2 * Copyright (C) 2005 Junio C Hamano
11 #include "xdiff-interface.h"
14 #include "run-command.h"
17 #include "submodule-config.h"
18 #include "submodule.h"
21 #include "string-list.h"
22 #include "argv-array.h"
25 #ifdef NO_FAST_WORKING_DIRECTORY
26 #define FAST_WORKING_DIRECTORY 0
28 #define FAST_WORKING_DIRECTORY 1
31 static int diff_detect_rename_default
;
32 static int diff_indent_heuristic
= 1;
33 static int diff_rename_limit_default
= 400;
34 static int diff_suppress_blank_empty
;
35 static int diff_use_color_default
= -1;
36 static int diff_color_moved_default
;
37 static int diff_context_default
= 3;
38 static int diff_interhunk_context_default
;
39 static const char *diff_word_regex_cfg
;
40 static const char *external_diff_cmd_cfg
;
41 static const char *diff_order_file_cfg
;
42 int diff_auto_refresh_index
= 1;
43 static int diff_mnemonic_prefix
;
44 static int diff_no_prefix
;
45 static int diff_stat_graph_width
;
46 static int diff_dirstat_permille_default
= 30;
47 static struct diff_options default_diff_options
;
48 static long diff_algorithm
;
49 static unsigned ws_error_highlight_default
= WSEH_NEW
;
51 static char diff_colors
[][COLOR_MAXLEN
] = {
53 GIT_COLOR_NORMAL
, /* CONTEXT */
54 GIT_COLOR_BOLD
, /* METAINFO */
55 GIT_COLOR_CYAN
, /* FRAGINFO */
56 GIT_COLOR_RED
, /* OLD */
57 GIT_COLOR_GREEN
, /* NEW */
58 GIT_COLOR_YELLOW
, /* COMMIT */
59 GIT_COLOR_BG_RED
, /* WHITESPACE */
60 GIT_COLOR_NORMAL
, /* FUNCINFO */
61 GIT_COLOR_BOLD_MAGENTA
, /* OLD_MOVED */
62 GIT_COLOR_BOLD_BLUE
, /* OLD_MOVED ALTERNATIVE */
63 GIT_COLOR_FAINT
, /* OLD_MOVED_DIM */
64 GIT_COLOR_FAINT_ITALIC
, /* OLD_MOVED_ALTERNATIVE_DIM */
65 GIT_COLOR_BOLD_CYAN
, /* NEW_MOVED */
66 GIT_COLOR_BOLD_YELLOW
, /* NEW_MOVED ALTERNATIVE */
67 GIT_COLOR_FAINT
, /* NEW_MOVED_DIM */
68 GIT_COLOR_FAINT_ITALIC
, /* NEW_MOVED_ALTERNATIVE_DIM */
71 static NORETURN
void die_want_option(const char *option_name
)
73 die(_("option '%s' requires a value"), option_name
);
76 static int parse_diff_color_slot(const char *var
)
78 if (!strcasecmp(var
, "context") || !strcasecmp(var
, "plain"))
80 if (!strcasecmp(var
, "meta"))
82 if (!strcasecmp(var
, "frag"))
84 if (!strcasecmp(var
, "old"))
86 if (!strcasecmp(var
, "new"))
88 if (!strcasecmp(var
, "commit"))
90 if (!strcasecmp(var
, "whitespace"))
91 return DIFF_WHITESPACE
;
92 if (!strcasecmp(var
, "func"))
94 if (!strcasecmp(var
, "oldmoved"))
95 return DIFF_FILE_OLD_MOVED
;
96 if (!strcasecmp(var
, "oldmovedalternative"))
97 return DIFF_FILE_OLD_MOVED_ALT
;
98 if (!strcasecmp(var
, "oldmoveddimmed"))
99 return DIFF_FILE_OLD_MOVED_DIM
;
100 if (!strcasecmp(var
, "oldmovedalternativedimmed"))
101 return DIFF_FILE_OLD_MOVED_ALT_DIM
;
102 if (!strcasecmp(var
, "newmoved"))
103 return DIFF_FILE_NEW_MOVED
;
104 if (!strcasecmp(var
, "newmovedalternative"))
105 return DIFF_FILE_NEW_MOVED_ALT
;
106 if (!strcasecmp(var
, "newmoveddimmed"))
107 return DIFF_FILE_NEW_MOVED_DIM
;
108 if (!strcasecmp(var
, "newmovedalternativedimmed"))
109 return DIFF_FILE_NEW_MOVED_ALT_DIM
;
113 static int parse_dirstat_params(struct diff_options
*options
, const char *params_string
,
114 struct strbuf
*errmsg
)
116 char *params_copy
= xstrdup(params_string
);
117 struct string_list params
= STRING_LIST_INIT_NODUP
;
122 string_list_split_in_place(¶ms
, params_copy
, ',', -1);
123 for (i
= 0; i
< params
.nr
; i
++) {
124 const char *p
= params
.items
[i
].string
;
125 if (!strcmp(p
, "changes")) {
126 DIFF_OPT_CLR(options
, DIRSTAT_BY_LINE
);
127 DIFF_OPT_CLR(options
, DIRSTAT_BY_FILE
);
128 } else if (!strcmp(p
, "lines")) {
129 DIFF_OPT_SET(options
, DIRSTAT_BY_LINE
);
130 DIFF_OPT_CLR(options
, DIRSTAT_BY_FILE
);
131 } else if (!strcmp(p
, "files")) {
132 DIFF_OPT_CLR(options
, DIRSTAT_BY_LINE
);
133 DIFF_OPT_SET(options
, DIRSTAT_BY_FILE
);
134 } else if (!strcmp(p
, "noncumulative")) {
135 DIFF_OPT_CLR(options
, DIRSTAT_CUMULATIVE
);
136 } else if (!strcmp(p
, "cumulative")) {
137 DIFF_OPT_SET(options
, DIRSTAT_CUMULATIVE
);
138 } else if (isdigit(*p
)) {
140 int permille
= strtoul(p
, &end
, 10) * 10;
141 if (*end
== '.' && isdigit(*++end
)) {
142 /* only use first digit */
143 permille
+= *end
- '0';
144 /* .. and ignore any further digits */
145 while (isdigit(*++end
))
149 options
->dirstat_permille
= permille
;
151 strbuf_addf(errmsg
, _(" Failed to parse dirstat cut-off percentage '%s'\n"),
156 strbuf_addf(errmsg
, _(" Unknown dirstat parameter '%s'\n"), p
);
161 string_list_clear(¶ms
, 0);
166 static int parse_submodule_params(struct diff_options
*options
, const char *value
)
168 if (!strcmp(value
, "log"))
169 options
->submodule_format
= DIFF_SUBMODULE_LOG
;
170 else if (!strcmp(value
, "short"))
171 options
->submodule_format
= DIFF_SUBMODULE_SHORT
;
172 else if (!strcmp(value
, "diff"))
173 options
->submodule_format
= DIFF_SUBMODULE_INLINE_DIFF
;
179 static int git_config_rename(const char *var
, const char *value
)
182 return DIFF_DETECT_RENAME
;
183 if (!strcasecmp(value
, "copies") || !strcasecmp(value
, "copy"))
184 return DIFF_DETECT_COPY
;
185 return git_config_bool(var
,value
) ? DIFF_DETECT_RENAME
: 0;
188 long parse_algorithm_value(const char *value
)
192 else if (!strcasecmp(value
, "myers") || !strcasecmp(value
, "default"))
194 else if (!strcasecmp(value
, "minimal"))
195 return XDF_NEED_MINIMAL
;
196 else if (!strcasecmp(value
, "patience"))
197 return XDF_PATIENCE_DIFF
;
198 else if (!strcasecmp(value
, "histogram"))
199 return XDF_HISTOGRAM_DIFF
;
203 static int parse_one_token(const char **arg
, const char *token
)
206 if (skip_prefix(*arg
, token
, &rest
) && (!*rest
|| *rest
== ',')) {
213 static int parse_ws_error_highlight(const char *arg
)
215 const char *orig_arg
= arg
;
219 if (parse_one_token(&arg
, "none"))
221 else if (parse_one_token(&arg
, "default"))
223 else if (parse_one_token(&arg
, "all"))
224 val
= WSEH_NEW
| WSEH_OLD
| WSEH_CONTEXT
;
225 else if (parse_one_token(&arg
, "new"))
227 else if (parse_one_token(&arg
, "old"))
229 else if (parse_one_token(&arg
, "context"))
232 return -1 - (int)(arg
- orig_arg
);
241 * These are to give UI layer defaults.
242 * The core-level commands such as git-diff-files should
243 * never be affected by the setting of diff.renames
244 * the user happens to have in the configuration file.
246 void init_diff_ui_defaults(void)
248 diff_detect_rename_default
= 1;
251 int git_diff_heuristic_config(const char *var
, const char *value
, void *cb
)
253 if (!strcmp(var
, "diff.indentheuristic"))
254 diff_indent_heuristic
= git_config_bool(var
, value
);
258 static int parse_color_moved(const char *arg
)
260 switch (git_parse_maybe_bool(arg
)) {
262 return COLOR_MOVED_NO
;
264 return COLOR_MOVED_DEFAULT
;
269 if (!strcmp(arg
, "no"))
270 return COLOR_MOVED_NO
;
271 else if (!strcmp(arg
, "plain"))
272 return COLOR_MOVED_PLAIN
;
273 else if (!strcmp(arg
, "zebra"))
274 return COLOR_MOVED_ZEBRA
;
275 else if (!strcmp(arg
, "default"))
276 return COLOR_MOVED_DEFAULT
;
277 else if (!strcmp(arg
, "dimmed_zebra"))
278 return COLOR_MOVED_ZEBRA_DIM
;
280 return error(_("color moved setting must be one of 'no', 'default', 'zebra', 'dimmed_zebra', 'plain'"));
283 int git_diff_ui_config(const char *var
, const char *value
, void *cb
)
285 if (!strcmp(var
, "diff.color") || !strcmp(var
, "color.diff")) {
286 diff_use_color_default
= git_config_colorbool(var
, value
);
289 if (!strcmp(var
, "diff.colormoved")) {
290 int cm
= parse_color_moved(value
);
293 diff_color_moved_default
= cm
;
296 if (!strcmp(var
, "diff.context")) {
297 diff_context_default
= git_config_int(var
, value
);
298 if (diff_context_default
< 0)
302 if (!strcmp(var
, "diff.interhunkcontext")) {
303 diff_interhunk_context_default
= git_config_int(var
, value
);
304 if (diff_interhunk_context_default
< 0)
308 if (!strcmp(var
, "diff.renames")) {
309 diff_detect_rename_default
= git_config_rename(var
, value
);
312 if (!strcmp(var
, "diff.autorefreshindex")) {
313 diff_auto_refresh_index
= git_config_bool(var
, value
);
316 if (!strcmp(var
, "diff.mnemonicprefix")) {
317 diff_mnemonic_prefix
= git_config_bool(var
, value
);
320 if (!strcmp(var
, "diff.noprefix")) {
321 diff_no_prefix
= git_config_bool(var
, value
);
324 if (!strcmp(var
, "diff.statgraphwidth")) {
325 diff_stat_graph_width
= git_config_int(var
, value
);
328 if (!strcmp(var
, "diff.external"))
329 return git_config_string(&external_diff_cmd_cfg
, var
, value
);
330 if (!strcmp(var
, "diff.wordregex"))
331 return git_config_string(&diff_word_regex_cfg
, var
, value
);
332 if (!strcmp(var
, "diff.orderfile"))
333 return git_config_pathname(&diff_order_file_cfg
, var
, value
);
335 if (!strcmp(var
, "diff.ignoresubmodules"))
336 handle_ignore_submodules_arg(&default_diff_options
, value
);
338 if (!strcmp(var
, "diff.submodule")) {
339 if (parse_submodule_params(&default_diff_options
, value
))
340 warning(_("Unknown value for 'diff.submodule' config variable: '%s'"),
345 if (!strcmp(var
, "diff.algorithm")) {
346 diff_algorithm
= parse_algorithm_value(value
);
347 if (diff_algorithm
< 0)
352 if (!strcmp(var
, "diff.wserrorhighlight")) {
353 int val
= parse_ws_error_highlight(value
);
356 ws_error_highlight_default
= val
;
360 if (git_color_config(var
, value
, cb
) < 0)
363 return git_diff_basic_config(var
, value
, cb
);
366 int git_diff_basic_config(const char *var
, const char *value
, void *cb
)
370 if (!strcmp(var
, "diff.renamelimit")) {
371 diff_rename_limit_default
= git_config_int(var
, value
);
375 if (userdiff_config(var
, value
) < 0)
378 if (skip_prefix(var
, "diff.color.", &name
) ||
379 skip_prefix(var
, "color.diff.", &name
)) {
380 int slot
= parse_diff_color_slot(name
);
384 return config_error_nonbool(var
);
385 return color_parse(value
, diff_colors
[slot
]);
388 /* like GNU diff's --suppress-blank-empty option */
389 if (!strcmp(var
, "diff.suppressblankempty") ||
390 /* for backwards compatibility */
391 !strcmp(var
, "diff.suppress-blank-empty")) {
392 diff_suppress_blank_empty
= git_config_bool(var
, value
);
396 if (!strcmp(var
, "diff.dirstat")) {
397 struct strbuf errmsg
= STRBUF_INIT
;
398 default_diff_options
.dirstat_permille
= diff_dirstat_permille_default
;
399 if (parse_dirstat_params(&default_diff_options
, value
, &errmsg
))
400 warning(_("Found errors in 'diff.dirstat' config variable:\n%s"),
402 strbuf_release(&errmsg
);
403 diff_dirstat_permille_default
= default_diff_options
.dirstat_permille
;
407 if (starts_with(var
, "submodule."))
408 return parse_submodule_config_option(var
, value
);
410 if (git_diff_heuristic_config(var
, value
, cb
) < 0)
413 return git_default_config(var
, value
, cb
);
416 static char *quote_two(const char *one
, const char *two
)
418 int need_one
= quote_c_style(one
, NULL
, NULL
, 1);
419 int need_two
= quote_c_style(two
, NULL
, NULL
, 1);
420 struct strbuf res
= STRBUF_INIT
;
422 if (need_one
+ need_two
) {
423 strbuf_addch(&res
, '"');
424 quote_c_style(one
, &res
, NULL
, 1);
425 quote_c_style(two
, &res
, NULL
, 1);
426 strbuf_addch(&res
, '"');
428 strbuf_addstr(&res
, one
);
429 strbuf_addstr(&res
, two
);
431 return strbuf_detach(&res
, NULL
);
434 static const char *external_diff(void)
436 static const char *external_diff_cmd
= NULL
;
437 static int done_preparing
= 0;
440 return external_diff_cmd
;
441 external_diff_cmd
= getenv("GIT_EXTERNAL_DIFF");
442 if (!external_diff_cmd
)
443 external_diff_cmd
= external_diff_cmd_cfg
;
445 return external_diff_cmd
;
449 * Keep track of files used for diffing. Sometimes such an entry
450 * refers to a temporary file, sometimes to an existing file, and
451 * sometimes to "/dev/null".
453 static struct diff_tempfile
{
455 * filename external diff should read from, or NULL if this
456 * entry is currently not in use:
460 char hex
[GIT_MAX_HEXSZ
+ 1];
464 * If this diff_tempfile instance refers to a temporary file,
465 * this tempfile object is used to manage its lifetime.
467 struct tempfile tempfile
;
470 typedef unsigned long (*sane_truncate_fn
)(char *line
, unsigned long len
);
472 struct emit_callback
{
475 int blank_at_eof_in_preimage
;
476 int blank_at_eof_in_postimage
;
478 int lno_in_postimage
;
479 sane_truncate_fn truncate
;
480 const char **label_path
;
481 struct diff_words_data
*diff_words
;
482 struct diff_options
*opt
;
483 struct strbuf
*header
;
486 static int count_lines(const char *data
, int size
)
488 int count
, ch
, completely_empty
= 1, nl_just_seen
= 0;
495 completely_empty
= 0;
499 completely_empty
= 0;
502 if (completely_empty
)
505 count
++; /* no trailing newline */
509 static int fill_mmfile(mmfile_t
*mf
, struct diff_filespec
*one
)
511 if (!DIFF_FILE_VALID(one
)) {
512 mf
->ptr
= (char *)""; /* does not matter */
516 else if (diff_populate_filespec(one
, 0))
520 mf
->size
= one
->size
;
524 /* like fill_mmfile, but only for size, so we can avoid retrieving blob */
525 static unsigned long diff_filespec_size(struct diff_filespec
*one
)
527 if (!DIFF_FILE_VALID(one
))
529 diff_populate_filespec(one
, CHECK_SIZE_ONLY
);
533 static int count_trailing_blank(mmfile_t
*mf
, unsigned ws_rule
)
536 long size
= mf
->size
;
541 ptr
+= size
- 1; /* pointing at the very end */
543 ; /* incomplete line */
545 ptr
--; /* skip the last LF */
546 while (mf
->ptr
< ptr
) {
548 for (prev_eol
= ptr
; mf
->ptr
<= prev_eol
; prev_eol
--)
549 if (*prev_eol
== '\n')
551 if (!ws_blank_line(prev_eol
+ 1, ptr
- prev_eol
, ws_rule
))
559 static void check_blank_at_eof(mmfile_t
*mf1
, mmfile_t
*mf2
,
560 struct emit_callback
*ecbdata
)
563 unsigned ws_rule
= ecbdata
->ws_rule
;
564 l1
= count_trailing_blank(mf1
, ws_rule
);
565 l2
= count_trailing_blank(mf2
, ws_rule
);
567 ecbdata
->blank_at_eof_in_preimage
= 0;
568 ecbdata
->blank_at_eof_in_postimage
= 0;
571 at
= count_lines(mf1
->ptr
, mf1
->size
);
572 ecbdata
->blank_at_eof_in_preimage
= (at
- l1
) + 1;
574 at
= count_lines(mf2
->ptr
, mf2
->size
);
575 ecbdata
->blank_at_eof_in_postimage
= (at
- l2
) + 1;
578 static void emit_line_0(struct diff_options
*o
, const char *set
, const char *reset
,
579 int first
, const char *line
, int len
)
581 int has_trailing_newline
, has_trailing_carriage_return
;
583 FILE *file
= o
->file
;
585 fputs(diff_line_prefix(o
), file
);
588 has_trailing_newline
= (first
== '\n');
589 has_trailing_carriage_return
= (!has_trailing_newline
&&
591 nofirst
= has_trailing_newline
|| has_trailing_carriage_return
;
593 has_trailing_newline
= (len
> 0 && line
[len
-1] == '\n');
594 if (has_trailing_newline
)
596 has_trailing_carriage_return
= (len
> 0 && line
[len
-1] == '\r');
597 if (has_trailing_carriage_return
)
602 if (len
|| !nofirst
) {
606 fwrite(line
, len
, 1, file
);
609 if (has_trailing_carriage_return
)
611 if (has_trailing_newline
)
615 static void emit_line(struct diff_options
*o
, const char *set
, const char *reset
,
616 const char *line
, int len
)
618 emit_line_0(o
, set
, reset
, line
[0], line
+1, len
-1);
622 DIFF_SYMBOL_BINARY_DIFF_HEADER
,
623 DIFF_SYMBOL_BINARY_DIFF_HEADER_DELTA
,
624 DIFF_SYMBOL_BINARY_DIFF_HEADER_LITERAL
,
625 DIFF_SYMBOL_BINARY_DIFF_BODY
,
626 DIFF_SYMBOL_BINARY_DIFF_FOOTER
,
627 DIFF_SYMBOL_STATS_SUMMARY_NO_FILES
,
628 DIFF_SYMBOL_STATS_SUMMARY_ABBREV
,
629 DIFF_SYMBOL_STATS_SUMMARY_INSERTS_DELETES
,
630 DIFF_SYMBOL_STATS_LINE
,
631 DIFF_SYMBOL_WORD_DIFF
,
632 DIFF_SYMBOL_STAT_SEP
,
634 DIFF_SYMBOL_SUBMODULE_ADD
,
635 DIFF_SYMBOL_SUBMODULE_DEL
,
636 DIFF_SYMBOL_SUBMODULE_UNTRACKED
,
637 DIFF_SYMBOL_SUBMODULE_MODIFIED
,
638 DIFF_SYMBOL_SUBMODULE_HEADER
,
639 DIFF_SYMBOL_SUBMODULE_ERROR
,
640 DIFF_SYMBOL_SUBMODULE_PIPETHROUGH
,
641 DIFF_SYMBOL_REWRITE_DIFF
,
642 DIFF_SYMBOL_BINARY_FILES
,
644 DIFF_SYMBOL_FILEPAIR_PLUS
,
645 DIFF_SYMBOL_FILEPAIR_MINUS
,
646 DIFF_SYMBOL_WORDS_PORCELAIN
,
649 DIFF_SYMBOL_CONTEXT_INCOMPLETE
,
652 DIFF_SYMBOL_NO_LF_EOF
,
653 DIFF_SYMBOL_CONTEXT_FRAGINFO
,
654 DIFF_SYMBOL_CONTEXT_MARKER
,
655 DIFF_SYMBOL_SEPARATOR
658 * Flags for content lines:
659 * 0..12 are whitespace rules
660 * 13-15 are WSEH_NEW | WSEH_OLD | WSEH_CONTEXT
661 * 16 is marking if the line is blank at EOF
663 #define DIFF_SYMBOL_CONTENT_BLANK_LINE_EOF (1<<16)
664 #define DIFF_SYMBOL_MOVED_LINE (1<<17)
665 #define DIFF_SYMBOL_MOVED_LINE_ALT (1<<18)
666 #define DIFF_SYMBOL_MOVED_LINE_UNINTERESTING (1<<19)
667 #define DIFF_SYMBOL_CONTENT_WS_MASK (WSEH_NEW | WSEH_OLD | WSEH_CONTEXT | WS_RULE_MASK)
670 * This struct is used when we need to buffer the output of the diff output.
672 * NEEDSWORK: Instead of storing a copy of the line, add an offset pointer
673 * into the pre/post image file. This pointer could be a union with the
674 * line pointer. By storing an offset into the file instead of the literal line,
675 * we can decrease the memory footprint for the buffered output. At first we
676 * may want to only have indirection for the content lines, but we could also
677 * enhance the state for emitting prefabricated lines, e.g. the similarity
678 * score line or hunk/file headers would only need to store a number or path
679 * and then the output can be constructed later on depending on state.
681 struct emitted_diff_symbol
{
687 #define EMITTED_DIFF_SYMBOL_INIT {NULL}
689 struct emitted_diff_symbols
{
690 struct emitted_diff_symbol
*buf
;
693 #define EMITTED_DIFF_SYMBOLS_INIT {NULL, 0, 0}
695 static void append_emitted_diff_symbol(struct diff_options
*o
,
696 struct emitted_diff_symbol
*e
)
698 struct emitted_diff_symbol
*f
;
700 ALLOC_GROW(o
->emitted_symbols
->buf
,
701 o
->emitted_symbols
->nr
+ 1,
702 o
->emitted_symbols
->alloc
);
703 f
= &o
->emitted_symbols
->buf
[o
->emitted_symbols
->nr
++];
705 memcpy(f
, e
, sizeof(struct emitted_diff_symbol
));
706 f
->line
= e
->line
? xmemdupz(e
->line
, e
->len
) : NULL
;
710 struct hashmap_entry ent
;
711 const struct emitted_diff_symbol
*es
;
712 struct moved_entry
*next_line
;
715 static int next_byte(const char **cp
, const char **endp
,
716 const struct diff_options
*diffopt
)
723 if (DIFF_XDL_TST(diffopt
, IGNORE_WHITESPACE_CHANGE
)) {
724 while (*cp
< *endp
&& isspace(**cp
))
727 * After skipping a couple of whitespaces, we still have to
728 * account for one space.
733 if (DIFF_XDL_TST(diffopt
, IGNORE_WHITESPACE
)) {
734 while (*cp
< *endp
&& isspace(**cp
))
736 /* return the first non-ws character via the usual below */
739 retval
= (unsigned char)(**cp
);
744 static int moved_entry_cmp(const struct diff_options
*diffopt
,
745 const struct moved_entry
*a
,
746 const struct moved_entry
*b
,
749 const char *ap
= a
->es
->line
, *ae
= a
->es
->line
+ a
->es
->len
;
750 const char *bp
= b
->es
->line
, *be
= b
->es
->line
+ b
->es
->len
;
752 if (!(diffopt
->xdl_opts
& XDF_WHITESPACE_FLAGS
))
753 return a
->es
->len
!= b
->es
->len
|| memcmp(ap
, bp
, a
->es
->len
);
755 if (DIFF_XDL_TST(diffopt
, IGNORE_WHITESPACE_AT_EOL
)) {
756 while (ae
> ap
&& isspace(*ae
))
758 while (be
> bp
&& isspace(*be
))
764 ca
= next_byte(&ap
, &ae
, diffopt
);
765 cb
= next_byte(&bp
, &be
, diffopt
);
773 static unsigned get_string_hash(struct emitted_diff_symbol
*es
, struct diff_options
*o
)
775 if (o
->xdl_opts
& XDF_WHITESPACE_FLAGS
) {
776 static struct strbuf sb
= STRBUF_INIT
;
777 const char *ap
= es
->line
, *ae
= es
->line
+ es
->len
;
781 while (ae
> ap
&& isspace(*ae
))
783 while ((c
= next_byte(&ap
, &ae
, o
)) > 0)
784 strbuf_addch(&sb
, c
);
786 return memhash(sb
.buf
, sb
.len
);
788 return memhash(es
->line
, es
->len
);
792 static struct moved_entry
*prepare_entry(struct diff_options
*o
,
795 struct moved_entry
*ret
= xmalloc(sizeof(*ret
));
796 struct emitted_diff_symbol
*l
= &o
->emitted_symbols
->buf
[line_no
];
798 ret
->ent
.hash
= get_string_hash(l
, o
);
800 ret
->next_line
= NULL
;
805 static void add_lines_to_move_detection(struct diff_options
*o
,
806 struct hashmap
*add_lines
,
807 struct hashmap
*del_lines
)
809 struct moved_entry
*prev_line
= NULL
;
812 for (n
= 0; n
< o
->emitted_symbols
->nr
; n
++) {
814 struct moved_entry
*key
;
816 switch (o
->emitted_symbols
->buf
[n
].s
) {
817 case DIFF_SYMBOL_PLUS
:
820 case DIFF_SYMBOL_MINUS
:
828 key
= prepare_entry(o
, n
);
829 if (prev_line
&& prev_line
->es
->s
== o
->emitted_symbols
->buf
[n
].s
)
830 prev_line
->next_line
= key
;
832 hashmap_add(hm
, key
);
837 static int shrink_potential_moved_blocks(struct moved_entry
**pmb
,
842 /* Shrink the set of potential block to the remaining running */
843 for (lp
= 0, rp
= pmb_nr
- 1; lp
<= rp
;) {
844 while (lp
< pmb_nr
&& pmb
[lp
])
846 /* lp points at the first NULL now */
848 while (rp
> -1 && !pmb
[rp
])
850 /* rp points at the last non-NULL */
852 if (lp
< pmb_nr
&& rp
> -1 && lp
< rp
) {
860 /* Remember the number of running sets */
864 /* Find blocks of moved code, delegate actual coloring decision to helper */
865 static void mark_color_as_moved(struct diff_options
*o
,
866 struct hashmap
*add_lines
,
867 struct hashmap
*del_lines
)
869 struct moved_entry
**pmb
= NULL
; /* potentially moved blocks */
870 int pmb_nr
= 0, pmb_alloc
= 0;
871 int n
, flipped_block
= 1, block_length
= 0;
874 for (n
= 0; n
< o
->emitted_symbols
->nr
; n
++) {
875 struct hashmap
*hm
= NULL
;
876 struct moved_entry
*key
;
877 struct moved_entry
*match
= NULL
;
878 struct emitted_diff_symbol
*l
= &o
->emitted_symbols
->buf
[n
];
882 case DIFF_SYMBOL_PLUS
:
884 key
= prepare_entry(o
, n
);
885 match
= hashmap_get(hm
, key
, o
);
888 case DIFF_SYMBOL_MINUS
:
890 key
= prepare_entry(o
, n
);
891 match
= hashmap_get(hm
, key
, o
);
899 if (block_length
< COLOR_MOVED_MIN_BLOCK_LENGTH
&&
900 o
->color_moved
!= COLOR_MOVED_PLAIN
) {
901 for (i
= 0; i
< block_length
+ 1; i
++) {
902 l
= &o
->emitted_symbols
->buf
[n
- i
];
903 l
->flags
&= ~DIFF_SYMBOL_MOVED_LINE
;
911 l
->flags
|= DIFF_SYMBOL_MOVED_LINE
;
914 if (o
->color_moved
== COLOR_MOVED_PLAIN
)
917 /* Check any potential block runs, advance each or nullify */
918 for (i
= 0; i
< pmb_nr
; i
++) {
919 struct moved_entry
*p
= pmb
[i
];
920 struct moved_entry
*pnext
= (p
&& p
->next_line
) ?
922 if (pnext
&& !hm
->cmpfn(o
, pnext
, match
, NULL
)) {
923 pmb
[i
] = p
->next_line
;
929 pmb_nr
= shrink_potential_moved_blocks(pmb
, pmb_nr
);
933 * The current line is the start of a new block.
934 * Setup the set of potential blocks.
936 for (; match
; match
= hashmap_get_next(hm
, match
)) {
937 ALLOC_GROW(pmb
, pmb_nr
+ 1, pmb_alloc
);
938 pmb
[pmb_nr
++] = match
;
941 flipped_block
= (flipped_block
+ 1) % 2;
945 l
->flags
|= DIFF_SYMBOL_MOVED_LINE_ALT
;
951 #define DIFF_SYMBOL_MOVED_LINE_ZEBRA_MASK \
952 (DIFF_SYMBOL_MOVED_LINE | DIFF_SYMBOL_MOVED_LINE_ALT)
953 static void dim_moved_lines(struct diff_options
*o
)
956 for (n
= 0; n
< o
->emitted_symbols
->nr
; n
++) {
957 struct emitted_diff_symbol
*prev
= (n
!= 0) ?
958 &o
->emitted_symbols
->buf
[n
- 1] : NULL
;
959 struct emitted_diff_symbol
*l
= &o
->emitted_symbols
->buf
[n
];
960 struct emitted_diff_symbol
*next
=
961 (n
< o
->emitted_symbols
->nr
- 1) ?
962 &o
->emitted_symbols
->buf
[n
+ 1] : NULL
;
964 /* Not a plus or minus line? */
965 if (l
->s
!= DIFF_SYMBOL_PLUS
&& l
->s
!= DIFF_SYMBOL_MINUS
)
968 /* Not a moved line? */
969 if (!(l
->flags
& DIFF_SYMBOL_MOVED_LINE
))
973 * If prev or next are not a plus or minus line,
974 * pretend they don't exist
976 if (prev
&& prev
->s
!= DIFF_SYMBOL_PLUS
&&
977 prev
->s
!= DIFF_SYMBOL_MINUS
)
979 if (next
&& next
->s
!= DIFF_SYMBOL_PLUS
&&
980 next
->s
!= DIFF_SYMBOL_MINUS
)
983 /* Inside a block? */
985 (prev
->flags
& DIFF_SYMBOL_MOVED_LINE_ZEBRA_MASK
) ==
986 (l
->flags
& DIFF_SYMBOL_MOVED_LINE_ZEBRA_MASK
)) &&
988 (next
->flags
& DIFF_SYMBOL_MOVED_LINE_ZEBRA_MASK
) ==
989 (l
->flags
& DIFF_SYMBOL_MOVED_LINE_ZEBRA_MASK
))) {
990 l
->flags
|= DIFF_SYMBOL_MOVED_LINE_UNINTERESTING
;
994 /* Check if we are at an interesting bound: */
995 if (prev
&& (prev
->flags
& DIFF_SYMBOL_MOVED_LINE
) &&
996 (prev
->flags
& DIFF_SYMBOL_MOVED_LINE_ALT
) !=
997 (l
->flags
& DIFF_SYMBOL_MOVED_LINE_ALT
))
999 if (next
&& (next
->flags
& DIFF_SYMBOL_MOVED_LINE
) &&
1000 (next
->flags
& DIFF_SYMBOL_MOVED_LINE_ALT
) !=
1001 (l
->flags
& DIFF_SYMBOL_MOVED_LINE_ALT
))
1005 * The boundary to prev and next are not interesting,
1006 * so this line is not interesting as a whole
1008 l
->flags
|= DIFF_SYMBOL_MOVED_LINE_UNINTERESTING
;
1012 static void emit_line_ws_markup(struct diff_options
*o
,
1013 const char *set
, const char *reset
,
1014 const char *line
, int len
, char sign
,
1015 unsigned ws_rule
, int blank_at_eof
)
1017 const char *ws
= NULL
;
1019 if (o
->ws_error_highlight
& ws_rule
) {
1020 ws
= diff_get_color_opt(o
, DIFF_WHITESPACE
);
1026 emit_line_0(o
, set
, reset
, sign
, line
, len
);
1027 else if (blank_at_eof
)
1028 /* Blank line at EOF - paint '+' as well */
1029 emit_line_0(o
, ws
, reset
, sign
, line
, len
);
1031 /* Emit just the prefix, then the rest. */
1032 emit_line_0(o
, set
, reset
, sign
, "", 0);
1033 ws_check_emit(line
, len
, ws_rule
,
1034 o
->file
, set
, reset
, ws
);
1038 static void emit_diff_symbol_from_struct(struct diff_options
*o
,
1039 struct emitted_diff_symbol
*eds
)
1041 static const char *nneof
= " No newline at end of file\n";
1042 const char *context
, *reset
, *set
, *meta
, *fraginfo
;
1043 struct strbuf sb
= STRBUF_INIT
;
1045 enum diff_symbol s
= eds
->s
;
1046 const char *line
= eds
->line
;
1048 unsigned flags
= eds
->flags
;
1051 case DIFF_SYMBOL_NO_LF_EOF
:
1052 context
= diff_get_color_opt(o
, DIFF_CONTEXT
);
1053 reset
= diff_get_color_opt(o
, DIFF_RESET
);
1054 putc('\n', o
->file
);
1055 emit_line_0(o
, context
, reset
, '\\',
1056 nneof
, strlen(nneof
));
1058 case DIFF_SYMBOL_SUBMODULE_HEADER
:
1059 case DIFF_SYMBOL_SUBMODULE_ERROR
:
1060 case DIFF_SYMBOL_SUBMODULE_PIPETHROUGH
:
1061 case DIFF_SYMBOL_STATS_SUMMARY_INSERTS_DELETES
:
1062 case DIFF_SYMBOL_SUMMARY
:
1063 case DIFF_SYMBOL_STATS_LINE
:
1064 case DIFF_SYMBOL_BINARY_DIFF_BODY
:
1065 case DIFF_SYMBOL_CONTEXT_FRAGINFO
:
1066 emit_line(o
, "", "", line
, len
);
1068 case DIFF_SYMBOL_CONTEXT_INCOMPLETE
:
1069 case DIFF_SYMBOL_CONTEXT_MARKER
:
1070 context
= diff_get_color_opt(o
, DIFF_CONTEXT
);
1071 reset
= diff_get_color_opt(o
, DIFF_RESET
);
1072 emit_line(o
, context
, reset
, line
, len
);
1074 case DIFF_SYMBOL_SEPARATOR
:
1075 fprintf(o
->file
, "%s%c",
1076 diff_line_prefix(o
),
1077 o
->line_termination
);
1079 case DIFF_SYMBOL_CONTEXT
:
1080 set
= diff_get_color_opt(o
, DIFF_CONTEXT
);
1081 reset
= diff_get_color_opt(o
, DIFF_RESET
);
1082 emit_line_ws_markup(o
, set
, reset
, line
, len
, ' ',
1083 flags
& (DIFF_SYMBOL_CONTENT_WS_MASK
), 0);
1085 case DIFF_SYMBOL_PLUS
:
1086 switch (flags
& (DIFF_SYMBOL_MOVED_LINE
|
1087 DIFF_SYMBOL_MOVED_LINE_ALT
|
1088 DIFF_SYMBOL_MOVED_LINE_UNINTERESTING
)) {
1089 case DIFF_SYMBOL_MOVED_LINE
|
1090 DIFF_SYMBOL_MOVED_LINE_ALT
|
1091 DIFF_SYMBOL_MOVED_LINE_UNINTERESTING
:
1092 set
= diff_get_color_opt(o
, DIFF_FILE_NEW_MOVED_ALT_DIM
);
1094 case DIFF_SYMBOL_MOVED_LINE
|
1095 DIFF_SYMBOL_MOVED_LINE_ALT
:
1096 set
= diff_get_color_opt(o
, DIFF_FILE_NEW_MOVED_ALT
);
1098 case DIFF_SYMBOL_MOVED_LINE
|
1099 DIFF_SYMBOL_MOVED_LINE_UNINTERESTING
:
1100 set
= diff_get_color_opt(o
, DIFF_FILE_NEW_MOVED_DIM
);
1102 case DIFF_SYMBOL_MOVED_LINE
:
1103 set
= diff_get_color_opt(o
, DIFF_FILE_NEW_MOVED
);
1106 set
= diff_get_color_opt(o
, DIFF_FILE_NEW
);
1108 reset
= diff_get_color_opt(o
, DIFF_RESET
);
1109 emit_line_ws_markup(o
, set
, reset
, line
, len
, '+',
1110 flags
& DIFF_SYMBOL_CONTENT_WS_MASK
,
1111 flags
& DIFF_SYMBOL_CONTENT_BLANK_LINE_EOF
);
1113 case DIFF_SYMBOL_MINUS
:
1114 switch (flags
& (DIFF_SYMBOL_MOVED_LINE
|
1115 DIFF_SYMBOL_MOVED_LINE_ALT
|
1116 DIFF_SYMBOL_MOVED_LINE_UNINTERESTING
)) {
1117 case DIFF_SYMBOL_MOVED_LINE
|
1118 DIFF_SYMBOL_MOVED_LINE_ALT
|
1119 DIFF_SYMBOL_MOVED_LINE_UNINTERESTING
:
1120 set
= diff_get_color_opt(o
, DIFF_FILE_OLD_MOVED_ALT_DIM
);
1122 case DIFF_SYMBOL_MOVED_LINE
|
1123 DIFF_SYMBOL_MOVED_LINE_ALT
:
1124 set
= diff_get_color_opt(o
, DIFF_FILE_OLD_MOVED_ALT
);
1126 case DIFF_SYMBOL_MOVED_LINE
|
1127 DIFF_SYMBOL_MOVED_LINE_UNINTERESTING
:
1128 set
= diff_get_color_opt(o
, DIFF_FILE_OLD_MOVED_DIM
);
1130 case DIFF_SYMBOL_MOVED_LINE
:
1131 set
= diff_get_color_opt(o
, DIFF_FILE_OLD_MOVED
);
1134 set
= diff_get_color_opt(o
, DIFF_FILE_OLD
);
1136 reset
= diff_get_color_opt(o
, DIFF_RESET
);
1137 emit_line_ws_markup(o
, set
, reset
, line
, len
, '-',
1138 flags
& DIFF_SYMBOL_CONTENT_WS_MASK
, 0);
1140 case DIFF_SYMBOL_WORDS_PORCELAIN
:
1141 context
= diff_get_color_opt(o
, DIFF_CONTEXT
);
1142 reset
= diff_get_color_opt(o
, DIFF_RESET
);
1143 emit_line(o
, context
, reset
, line
, len
);
1144 fputs("~\n", o
->file
);
1146 case DIFF_SYMBOL_WORDS
:
1147 context
= diff_get_color_opt(o
, DIFF_CONTEXT
);
1148 reset
= diff_get_color_opt(o
, DIFF_RESET
);
1150 * Skip the prefix character, if any. With
1151 * diff_suppress_blank_empty, there may be
1154 if (line
[0] != '\n') {
1158 emit_line(o
, context
, reset
, line
, len
);
1160 case DIFF_SYMBOL_FILEPAIR_PLUS
:
1161 meta
= diff_get_color_opt(o
, DIFF_METAINFO
);
1162 reset
= diff_get_color_opt(o
, DIFF_RESET
);
1163 fprintf(o
->file
, "%s%s+++ %s%s%s\n", diff_line_prefix(o
), meta
,
1165 strchr(line
, ' ') ? "\t" : "");
1167 case DIFF_SYMBOL_FILEPAIR_MINUS
:
1168 meta
= diff_get_color_opt(o
, DIFF_METAINFO
);
1169 reset
= diff_get_color_opt(o
, DIFF_RESET
);
1170 fprintf(o
->file
, "%s%s--- %s%s%s\n", diff_line_prefix(o
), meta
,
1172 strchr(line
, ' ') ? "\t" : "");
1174 case DIFF_SYMBOL_BINARY_FILES
:
1175 case DIFF_SYMBOL_HEADER
:
1176 fprintf(o
->file
, "%s", line
);
1178 case DIFF_SYMBOL_BINARY_DIFF_HEADER
:
1179 fprintf(o
->file
, "%sGIT binary patch\n", diff_line_prefix(o
));
1181 case DIFF_SYMBOL_BINARY_DIFF_HEADER_DELTA
:
1182 fprintf(o
->file
, "%sdelta %s\n", diff_line_prefix(o
), line
);
1184 case DIFF_SYMBOL_BINARY_DIFF_HEADER_LITERAL
:
1185 fprintf(o
->file
, "%sliteral %s\n", diff_line_prefix(o
), line
);
1187 case DIFF_SYMBOL_BINARY_DIFF_FOOTER
:
1188 fputs(diff_line_prefix(o
), o
->file
);
1189 fputc('\n', o
->file
);
1191 case DIFF_SYMBOL_REWRITE_DIFF
:
1192 fraginfo
= diff_get_color(o
->use_color
, DIFF_FRAGINFO
);
1193 reset
= diff_get_color_opt(o
, DIFF_RESET
);
1194 emit_line(o
, fraginfo
, reset
, line
, len
);
1196 case DIFF_SYMBOL_SUBMODULE_ADD
:
1197 set
= diff_get_color_opt(o
, DIFF_FILE_NEW
);
1198 reset
= diff_get_color_opt(o
, DIFF_RESET
);
1199 emit_line(o
, set
, reset
, line
, len
);
1201 case DIFF_SYMBOL_SUBMODULE_DEL
:
1202 set
= diff_get_color_opt(o
, DIFF_FILE_OLD
);
1203 reset
= diff_get_color_opt(o
, DIFF_RESET
);
1204 emit_line(o
, set
, reset
, line
, len
);
1206 case DIFF_SYMBOL_SUBMODULE_UNTRACKED
:
1207 fprintf(o
->file
, "%sSubmodule %s contains untracked content\n",
1208 diff_line_prefix(o
), line
);
1210 case DIFF_SYMBOL_SUBMODULE_MODIFIED
:
1211 fprintf(o
->file
, "%sSubmodule %s contains modified content\n",
1212 diff_line_prefix(o
), line
);
1214 case DIFF_SYMBOL_STATS_SUMMARY_NO_FILES
:
1215 emit_line(o
, "", "", " 0 files changed\n",
1216 strlen(" 0 files changed\n"));
1218 case DIFF_SYMBOL_STATS_SUMMARY_ABBREV
:
1219 emit_line(o
, "", "", " ...\n", strlen(" ...\n"));
1221 case DIFF_SYMBOL_WORD_DIFF
:
1222 fprintf(o
->file
, "%.*s", len
, line
);
1224 case DIFF_SYMBOL_STAT_SEP
:
1225 fputs(o
->stat_sep
, o
->file
);
1228 die("BUG: unknown diff symbol");
1230 strbuf_release(&sb
);
1233 static void emit_diff_symbol(struct diff_options
*o
, enum diff_symbol s
,
1234 const char *line
, int len
, unsigned flags
)
1236 struct emitted_diff_symbol e
= {line
, len
, flags
, s
};
1238 if (o
->emitted_symbols
)
1239 append_emitted_diff_symbol(o
, &e
);
1241 emit_diff_symbol_from_struct(o
, &e
);
1244 void diff_emit_submodule_del(struct diff_options
*o
, const char *line
)
1246 emit_diff_symbol(o
, DIFF_SYMBOL_SUBMODULE_DEL
, line
, strlen(line
), 0);
1249 void diff_emit_submodule_add(struct diff_options
*o
, const char *line
)
1251 emit_diff_symbol(o
, DIFF_SYMBOL_SUBMODULE_ADD
, line
, strlen(line
), 0);
1254 void diff_emit_submodule_untracked(struct diff_options
*o
, const char *path
)
1256 emit_diff_symbol(o
, DIFF_SYMBOL_SUBMODULE_UNTRACKED
,
1257 path
, strlen(path
), 0);
1260 void diff_emit_submodule_modified(struct diff_options
*o
, const char *path
)
1262 emit_diff_symbol(o
, DIFF_SYMBOL_SUBMODULE_MODIFIED
,
1263 path
, strlen(path
), 0);
1266 void diff_emit_submodule_header(struct diff_options
*o
, const char *header
)
1268 emit_diff_symbol(o
, DIFF_SYMBOL_SUBMODULE_HEADER
,
1269 header
, strlen(header
), 0);
1272 void diff_emit_submodule_error(struct diff_options
*o
, const char *err
)
1274 emit_diff_symbol(o
, DIFF_SYMBOL_SUBMODULE_ERROR
, err
, strlen(err
), 0);
1277 void diff_emit_submodule_pipethrough(struct diff_options
*o
,
1278 const char *line
, int len
)
1280 emit_diff_symbol(o
, DIFF_SYMBOL_SUBMODULE_PIPETHROUGH
, line
, len
, 0);
1283 static int new_blank_line_at_eof(struct emit_callback
*ecbdata
, const char *line
, int len
)
1285 if (!((ecbdata
->ws_rule
& WS_BLANK_AT_EOF
) &&
1286 ecbdata
->blank_at_eof_in_preimage
&&
1287 ecbdata
->blank_at_eof_in_postimage
&&
1288 ecbdata
->blank_at_eof_in_preimage
<= ecbdata
->lno_in_preimage
&&
1289 ecbdata
->blank_at_eof_in_postimage
<= ecbdata
->lno_in_postimage
))
1291 return ws_blank_line(line
, len
, ecbdata
->ws_rule
);
1294 static void emit_add_line(const char *reset
,
1295 struct emit_callback
*ecbdata
,
1296 const char *line
, int len
)
1298 unsigned flags
= WSEH_NEW
| ecbdata
->ws_rule
;
1299 if (new_blank_line_at_eof(ecbdata
, line
, len
))
1300 flags
|= DIFF_SYMBOL_CONTENT_BLANK_LINE_EOF
;
1302 emit_diff_symbol(ecbdata
->opt
, DIFF_SYMBOL_PLUS
, line
, len
, flags
);
1305 static void emit_del_line(const char *reset
,
1306 struct emit_callback
*ecbdata
,
1307 const char *line
, int len
)
1309 unsigned flags
= WSEH_OLD
| ecbdata
->ws_rule
;
1310 emit_diff_symbol(ecbdata
->opt
, DIFF_SYMBOL_MINUS
, line
, len
, flags
);
1313 static void emit_context_line(const char *reset
,
1314 struct emit_callback
*ecbdata
,
1315 const char *line
, int len
)
1317 unsigned flags
= WSEH_CONTEXT
| ecbdata
->ws_rule
;
1318 emit_diff_symbol(ecbdata
->opt
, DIFF_SYMBOL_CONTEXT
, line
, len
, flags
);
1321 static void emit_hunk_header(struct emit_callback
*ecbdata
,
1322 const char *line
, int len
)
1324 const char *context
= diff_get_color(ecbdata
->color_diff
, DIFF_CONTEXT
);
1325 const char *frag
= diff_get_color(ecbdata
->color_diff
, DIFF_FRAGINFO
);
1326 const char *func
= diff_get_color(ecbdata
->color_diff
, DIFF_FUNCINFO
);
1327 const char *reset
= diff_get_color(ecbdata
->color_diff
, DIFF_RESET
);
1328 static const char atat
[2] = { '@', '@' };
1329 const char *cp
, *ep
;
1330 struct strbuf msgbuf
= STRBUF_INIT
;
1335 * As a hunk header must begin with "@@ -<old>, +<new> @@",
1336 * it always is at least 10 bytes long.
1339 memcmp(line
, atat
, 2) ||
1340 !(ep
= memmem(line
+ 2, len
- 2, atat
, 2))) {
1341 emit_diff_symbol(ecbdata
->opt
,
1342 DIFF_SYMBOL_CONTEXT_MARKER
, line
, len
, 0);
1345 ep
+= 2; /* skip over @@ */
1347 /* The hunk header in fraginfo color */
1348 strbuf_addstr(&msgbuf
, frag
);
1349 strbuf_add(&msgbuf
, line
, ep
- line
);
1350 strbuf_addstr(&msgbuf
, reset
);
1356 if (line
[len
- i
] == '\r' || line
[len
- i
] == '\n')
1359 /* blank before the func header */
1360 for (cp
= ep
; ep
- line
< len
; ep
++)
1361 if (*ep
!= ' ' && *ep
!= '\t')
1364 strbuf_addstr(&msgbuf
, context
);
1365 strbuf_add(&msgbuf
, cp
, ep
- cp
);
1366 strbuf_addstr(&msgbuf
, reset
);
1369 if (ep
< line
+ len
) {
1370 strbuf_addstr(&msgbuf
, func
);
1371 strbuf_add(&msgbuf
, ep
, line
+ len
- ep
);
1372 strbuf_addstr(&msgbuf
, reset
);
1375 strbuf_add(&msgbuf
, line
+ len
, org_len
- len
);
1376 strbuf_complete_line(&msgbuf
);
1377 emit_diff_symbol(ecbdata
->opt
,
1378 DIFF_SYMBOL_CONTEXT_FRAGINFO
, msgbuf
.buf
, msgbuf
.len
, 0);
1379 strbuf_release(&msgbuf
);
1382 static struct diff_tempfile
*claim_diff_tempfile(void) {
1384 for (i
= 0; i
< ARRAY_SIZE(diff_temp
); i
++)
1385 if (!diff_temp
[i
].name
)
1386 return diff_temp
+ i
;
1387 die("BUG: diff is failing to clean up its tempfiles");
1390 static void remove_tempfile(void)
1393 for (i
= 0; i
< ARRAY_SIZE(diff_temp
); i
++) {
1394 if (is_tempfile_active(&diff_temp
[i
].tempfile
))
1395 delete_tempfile(&diff_temp
[i
].tempfile
);
1396 diff_temp
[i
].name
= NULL
;
1400 static void add_line_count(struct strbuf
*out
, int count
)
1404 strbuf_addstr(out
, "0,0");
1407 strbuf_addstr(out
, "1");
1410 strbuf_addf(out
, "1,%d", count
);
1415 static void emit_rewrite_lines(struct emit_callback
*ecb
,
1416 int prefix
, const char *data
, int size
)
1418 const char *endp
= NULL
;
1419 const char *reset
= diff_get_color(ecb
->color_diff
, DIFF_RESET
);
1424 endp
= memchr(data
, '\n', size
);
1425 len
= endp
? (endp
- data
+ 1) : size
;
1426 if (prefix
!= '+') {
1427 ecb
->lno_in_preimage
++;
1428 emit_del_line(reset
, ecb
, data
, len
);
1430 ecb
->lno_in_postimage
++;
1431 emit_add_line(reset
, ecb
, data
, len
);
1437 emit_diff_symbol(ecb
->opt
, DIFF_SYMBOL_NO_LF_EOF
, NULL
, 0, 0);
1440 static void emit_rewrite_diff(const char *name_a
,
1442 struct diff_filespec
*one
,
1443 struct diff_filespec
*two
,
1444 struct userdiff_driver
*textconv_one
,
1445 struct userdiff_driver
*textconv_two
,
1446 struct diff_options
*o
)
1449 static struct strbuf a_name
= STRBUF_INIT
, b_name
= STRBUF_INIT
;
1450 const char *a_prefix
, *b_prefix
;
1451 char *data_one
, *data_two
;
1452 size_t size_one
, size_two
;
1453 struct emit_callback ecbdata
;
1454 struct strbuf out
= STRBUF_INIT
;
1456 if (diff_mnemonic_prefix
&& DIFF_OPT_TST(o
, REVERSE_DIFF
)) {
1457 a_prefix
= o
->b_prefix
;
1458 b_prefix
= o
->a_prefix
;
1460 a_prefix
= o
->a_prefix
;
1461 b_prefix
= o
->b_prefix
;
1464 name_a
+= (*name_a
== '/');
1465 name_b
+= (*name_b
== '/');
1467 strbuf_reset(&a_name
);
1468 strbuf_reset(&b_name
);
1469 quote_two_c_style(&a_name
, a_prefix
, name_a
, 0);
1470 quote_two_c_style(&b_name
, b_prefix
, name_b
, 0);
1472 size_one
= fill_textconv(textconv_one
, one
, &data_one
);
1473 size_two
= fill_textconv(textconv_two
, two
, &data_two
);
1475 memset(&ecbdata
, 0, sizeof(ecbdata
));
1476 ecbdata
.color_diff
= want_color(o
->use_color
);
1477 ecbdata
.ws_rule
= whitespace_rule(name_b
);
1479 if (ecbdata
.ws_rule
& WS_BLANK_AT_EOF
) {
1481 mf1
.ptr
= (char *)data_one
;
1482 mf2
.ptr
= (char *)data_two
;
1483 mf1
.size
= size_one
;
1484 mf2
.size
= size_two
;
1485 check_blank_at_eof(&mf1
, &mf2
, &ecbdata
);
1487 ecbdata
.lno_in_preimage
= 1;
1488 ecbdata
.lno_in_postimage
= 1;
1490 lc_a
= count_lines(data_one
, size_one
);
1491 lc_b
= count_lines(data_two
, size_two
);
1493 emit_diff_symbol(o
, DIFF_SYMBOL_FILEPAIR_MINUS
,
1494 a_name
.buf
, a_name
.len
, 0);
1495 emit_diff_symbol(o
, DIFF_SYMBOL_FILEPAIR_PLUS
,
1496 b_name
.buf
, b_name
.len
, 0);
1498 strbuf_addstr(&out
, "@@ -");
1499 if (!o
->irreversible_delete
)
1500 add_line_count(&out
, lc_a
);
1502 strbuf_addstr(&out
, "?,?");
1503 strbuf_addstr(&out
, " +");
1504 add_line_count(&out
, lc_b
);
1505 strbuf_addstr(&out
, " @@\n");
1506 emit_diff_symbol(o
, DIFF_SYMBOL_REWRITE_DIFF
, out
.buf
, out
.len
, 0);
1507 strbuf_release(&out
);
1509 if (lc_a
&& !o
->irreversible_delete
)
1510 emit_rewrite_lines(&ecbdata
, '-', data_one
, size_one
);
1512 emit_rewrite_lines(&ecbdata
, '+', data_two
, size_two
);
1514 free((char *)data_one
);
1516 free((char *)data_two
);
1519 struct diff_words_buffer
{
1522 struct diff_words_orig
{
1523 const char *begin
, *end
;
1525 int orig_nr
, orig_alloc
;
1528 static void diff_words_append(char *line
, unsigned long len
,
1529 struct diff_words_buffer
*buffer
)
1531 ALLOC_GROW(buffer
->text
.ptr
, buffer
->text
.size
+ len
, buffer
->alloc
);
1534 memcpy(buffer
->text
.ptr
+ buffer
->text
.size
, line
, len
);
1535 buffer
->text
.size
+= len
;
1536 buffer
->text
.ptr
[buffer
->text
.size
] = '\0';
1539 struct diff_words_style_elem
{
1542 const char *color
; /* NULL; filled in by the setup code if
1543 * color is enabled */
1546 struct diff_words_style
{
1547 enum diff_words_type type
;
1548 struct diff_words_style_elem
new, old
, ctx
;
1549 const char *newline
;
1552 static struct diff_words_style diff_words_styles
[] = {
1553 { DIFF_WORDS_PORCELAIN
, {"+", "\n"}, {"-", "\n"}, {" ", "\n"}, "~\n" },
1554 { DIFF_WORDS_PLAIN
, {"{+", "+}"}, {"[-", "-]"}, {"", ""}, "\n" },
1555 { DIFF_WORDS_COLOR
, {"", ""}, {"", ""}, {"", ""}, "\n" }
1558 struct diff_words_data
{
1559 struct diff_words_buffer minus
, plus
;
1560 const char *current_plus
;
1562 struct diff_options
*opt
;
1563 regex_t
*word_regex
;
1564 enum diff_words_type type
;
1565 struct diff_words_style
*style
;
1568 static int fn_out_diff_words_write_helper(struct diff_options
*o
,
1569 struct diff_words_style_elem
*st_el
,
1570 const char *newline
,
1571 size_t count
, const char *buf
)
1574 struct strbuf sb
= STRBUF_INIT
;
1577 char *p
= memchr(buf
, '\n', count
);
1579 strbuf_addstr(&sb
, diff_line_prefix(o
));
1582 const char *reset
= st_el
->color
&& *st_el
->color
?
1583 GIT_COLOR_RESET
: NULL
;
1584 if (st_el
->color
&& *st_el
->color
)
1585 strbuf_addstr(&sb
, st_el
->color
);
1586 strbuf_addstr(&sb
, st_el
->prefix
);
1587 strbuf_add(&sb
, buf
, p
? p
- buf
: count
);
1588 strbuf_addstr(&sb
, st_el
->suffix
);
1590 strbuf_addstr(&sb
, reset
);
1595 strbuf_addstr(&sb
, newline
);
1596 count
-= p
+ 1 - buf
;
1600 emit_diff_symbol(o
, DIFF_SYMBOL_WORD_DIFF
,
1608 emit_diff_symbol(o
, DIFF_SYMBOL_WORD_DIFF
,
1610 strbuf_release(&sb
);
1615 * '--color-words' algorithm can be described as:
1617 * 1. collect the minus/plus lines of a diff hunk, divided into
1618 * minus-lines and plus-lines;
1620 * 2. break both minus-lines and plus-lines into words and
1621 * place them into two mmfile_t with one word for each line;
1623 * 3. use xdiff to run diff on the two mmfile_t to get the words level diff;
1625 * And for the common parts of the both file, we output the plus side text.
1626 * diff_words->current_plus is used to trace the current position of the plus file
1627 * which printed. diff_words->last_minus is used to trace the last minus word
1630 * For '--graph' to work with '--color-words', we need to output the graph prefix
1631 * on each line of color words output. Generally, there are two conditions on
1632 * which we should output the prefix.
1634 * 1. diff_words->last_minus == 0 &&
1635 * diff_words->current_plus == diff_words->plus.text.ptr
1637 * that is: the plus text must start as a new line, and if there is no minus
1638 * word printed, a graph prefix must be printed.
1640 * 2. diff_words->current_plus > diff_words->plus.text.ptr &&
1641 * *(diff_words->current_plus - 1) == '\n'
1643 * that is: a graph prefix must be printed following a '\n'
1645 static int color_words_output_graph_prefix(struct diff_words_data
*diff_words
)
1647 if ((diff_words
->last_minus
== 0 &&
1648 diff_words
->current_plus
== diff_words
->plus
.text
.ptr
) ||
1649 (diff_words
->current_plus
> diff_words
->plus
.text
.ptr
&&
1650 *(diff_words
->current_plus
- 1) == '\n')) {
1657 static void fn_out_diff_words_aux(void *priv
, char *line
, unsigned long len
)
1659 struct diff_words_data
*diff_words
= priv
;
1660 struct diff_words_style
*style
= diff_words
->style
;
1661 int minus_first
, minus_len
, plus_first
, plus_len
;
1662 const char *minus_begin
, *minus_end
, *plus_begin
, *plus_end
;
1663 struct diff_options
*opt
= diff_words
->opt
;
1664 const char *line_prefix
;
1666 if (line
[0] != '@' || parse_hunk_header(line
, len
,
1667 &minus_first
, &minus_len
, &plus_first
, &plus_len
))
1671 line_prefix
= diff_line_prefix(opt
);
1673 /* POSIX requires that first be decremented by one if len == 0... */
1675 minus_begin
= diff_words
->minus
.orig
[minus_first
].begin
;
1677 diff_words
->minus
.orig
[minus_first
+ minus_len
- 1].end
;
1679 minus_begin
= minus_end
=
1680 diff_words
->minus
.orig
[minus_first
].end
;
1683 plus_begin
= diff_words
->plus
.orig
[plus_first
].begin
;
1684 plus_end
= diff_words
->plus
.orig
[plus_first
+ plus_len
- 1].end
;
1686 plus_begin
= plus_end
= diff_words
->plus
.orig
[plus_first
].end
;
1688 if (color_words_output_graph_prefix(diff_words
)) {
1689 fputs(line_prefix
, diff_words
->opt
->file
);
1691 if (diff_words
->current_plus
!= plus_begin
) {
1692 fn_out_diff_words_write_helper(diff_words
->opt
,
1693 &style
->ctx
, style
->newline
,
1694 plus_begin
- diff_words
->current_plus
,
1695 diff_words
->current_plus
);
1697 if (minus_begin
!= minus_end
) {
1698 fn_out_diff_words_write_helper(diff_words
->opt
,
1699 &style
->old
, style
->newline
,
1700 minus_end
- minus_begin
, minus_begin
);
1702 if (plus_begin
!= plus_end
) {
1703 fn_out_diff_words_write_helper(diff_words
->opt
,
1704 &style
->new, style
->newline
,
1705 plus_end
- plus_begin
, plus_begin
);
1708 diff_words
->current_plus
= plus_end
;
1709 diff_words
->last_minus
= minus_first
;
1712 /* This function starts looking at *begin, and returns 0 iff a word was found. */
1713 static int find_word_boundaries(mmfile_t
*buffer
, regex_t
*word_regex
,
1714 int *begin
, int *end
)
1716 if (word_regex
&& *begin
< buffer
->size
) {
1717 regmatch_t match
[1];
1718 if (!regexec_buf(word_regex
, buffer
->ptr
+ *begin
,
1719 buffer
->size
- *begin
, 1, match
, 0)) {
1720 char *p
= memchr(buffer
->ptr
+ *begin
+ match
[0].rm_so
,
1721 '\n', match
[0].rm_eo
- match
[0].rm_so
);
1722 *end
= p
? p
- buffer
->ptr
: match
[0].rm_eo
+ *begin
;
1723 *begin
+= match
[0].rm_so
;
1724 return *begin
>= *end
;
1729 /* find the next word */
1730 while (*begin
< buffer
->size
&& isspace(buffer
->ptr
[*begin
]))
1732 if (*begin
>= buffer
->size
)
1735 /* find the end of the word */
1737 while (*end
< buffer
->size
&& !isspace(buffer
->ptr
[*end
]))
1744 * This function splits the words in buffer->text, stores the list with
1745 * newline separator into out, and saves the offsets of the original words
1748 static void diff_words_fill(struct diff_words_buffer
*buffer
, mmfile_t
*out
,
1749 regex_t
*word_regex
)
1757 /* fake an empty "0th" word */
1758 ALLOC_GROW(buffer
->orig
, 1, buffer
->orig_alloc
);
1759 buffer
->orig
[0].begin
= buffer
->orig
[0].end
= buffer
->text
.ptr
;
1760 buffer
->orig_nr
= 1;
1762 for (i
= 0; i
< buffer
->text
.size
; i
++) {
1763 if (find_word_boundaries(&buffer
->text
, word_regex
, &i
, &j
))
1766 /* store original boundaries */
1767 ALLOC_GROW(buffer
->orig
, buffer
->orig_nr
+ 1,
1768 buffer
->orig_alloc
);
1769 buffer
->orig
[buffer
->orig_nr
].begin
= buffer
->text
.ptr
+ i
;
1770 buffer
->orig
[buffer
->orig_nr
].end
= buffer
->text
.ptr
+ j
;
1773 /* store one word */
1774 ALLOC_GROW(out
->ptr
, out
->size
+ j
- i
+ 1, alloc
);
1775 memcpy(out
->ptr
+ out
->size
, buffer
->text
.ptr
+ i
, j
- i
);
1776 out
->ptr
[out
->size
+ j
- i
] = '\n';
1777 out
->size
+= j
- i
+ 1;
1783 /* this executes the word diff on the accumulated buffers */
1784 static void diff_words_show(struct diff_words_data
*diff_words
)
1788 mmfile_t minus
, plus
;
1789 struct diff_words_style
*style
= diff_words
->style
;
1791 struct diff_options
*opt
= diff_words
->opt
;
1792 const char *line_prefix
;
1795 line_prefix
= diff_line_prefix(opt
);
1797 /* special case: only removal */
1798 if (!diff_words
->plus
.text
.size
) {
1799 emit_diff_symbol(diff_words
->opt
, DIFF_SYMBOL_WORD_DIFF
,
1800 line_prefix
, strlen(line_prefix
), 0);
1801 fn_out_diff_words_write_helper(diff_words
->opt
,
1802 &style
->old
, style
->newline
,
1803 diff_words
->minus
.text
.size
,
1804 diff_words
->minus
.text
.ptr
);
1805 diff_words
->minus
.text
.size
= 0;
1809 diff_words
->current_plus
= diff_words
->plus
.text
.ptr
;
1810 diff_words
->last_minus
= 0;
1812 memset(&xpp
, 0, sizeof(xpp
));
1813 memset(&xecfg
, 0, sizeof(xecfg
));
1814 diff_words_fill(&diff_words
->minus
, &minus
, diff_words
->word_regex
);
1815 diff_words_fill(&diff_words
->plus
, &plus
, diff_words
->word_regex
);
1817 /* as only the hunk header will be parsed, we need a 0-context */
1819 if (xdi_diff_outf(&minus
, &plus
, fn_out_diff_words_aux
, diff_words
,
1821 die("unable to generate word diff");
1824 if (diff_words
->current_plus
!= diff_words
->plus
.text
.ptr
+
1825 diff_words
->plus
.text
.size
) {
1826 if (color_words_output_graph_prefix(diff_words
))
1827 emit_diff_symbol(diff_words
->opt
, DIFF_SYMBOL_WORD_DIFF
,
1828 line_prefix
, strlen(line_prefix
), 0);
1829 fn_out_diff_words_write_helper(diff_words
->opt
,
1830 &style
->ctx
, style
->newline
,
1831 diff_words
->plus
.text
.ptr
+ diff_words
->plus
.text
.size
1832 - diff_words
->current_plus
, diff_words
->current_plus
);
1834 diff_words
->minus
.text
.size
= diff_words
->plus
.text
.size
= 0;
1837 /* In "color-words" mode, show word-diff of words accumulated in the buffer */
1838 static void diff_words_flush(struct emit_callback
*ecbdata
)
1840 struct diff_options
*wo
= ecbdata
->diff_words
->opt
;
1842 if (ecbdata
->diff_words
->minus
.text
.size
||
1843 ecbdata
->diff_words
->plus
.text
.size
)
1844 diff_words_show(ecbdata
->diff_words
);
1846 if (wo
->emitted_symbols
) {
1847 struct diff_options
*o
= ecbdata
->opt
;
1848 struct emitted_diff_symbols
*wol
= wo
->emitted_symbols
;
1853 * Instead of appending each, concat all words to a line?
1855 for (i
= 0; i
< wol
->nr
; i
++)
1856 append_emitted_diff_symbol(o
, &wol
->buf
[i
]);
1858 for (i
= 0; i
< wol
->nr
; i
++)
1859 free((void *)wol
->buf
[i
].line
);
1865 static void diff_filespec_load_driver(struct diff_filespec
*one
)
1867 /* Use already-loaded driver */
1871 if (S_ISREG(one
->mode
))
1872 one
->driver
= userdiff_find_by_path(one
->path
);
1874 /* Fallback to default settings */
1876 one
->driver
= userdiff_find_by_name("default");
1879 static const char *userdiff_word_regex(struct diff_filespec
*one
)
1881 diff_filespec_load_driver(one
);
1882 return one
->driver
->word_regex
;
1885 static void init_diff_words_data(struct emit_callback
*ecbdata
,
1886 struct diff_options
*orig_opts
,
1887 struct diff_filespec
*one
,
1888 struct diff_filespec
*two
)
1891 struct diff_options
*o
= xmalloc(sizeof(struct diff_options
));
1892 memcpy(o
, orig_opts
, sizeof(struct diff_options
));
1894 ecbdata
->diff_words
=
1895 xcalloc(1, sizeof(struct diff_words_data
));
1896 ecbdata
->diff_words
->type
= o
->word_diff
;
1897 ecbdata
->diff_words
->opt
= o
;
1899 if (orig_opts
->emitted_symbols
)
1900 o
->emitted_symbols
=
1901 xcalloc(1, sizeof(struct emitted_diff_symbols
));
1904 o
->word_regex
= userdiff_word_regex(one
);
1906 o
->word_regex
= userdiff_word_regex(two
);
1908 o
->word_regex
= diff_word_regex_cfg
;
1909 if (o
->word_regex
) {
1910 ecbdata
->diff_words
->word_regex
= (regex_t
*)
1911 xmalloc(sizeof(regex_t
));
1912 if (regcomp(ecbdata
->diff_words
->word_regex
,
1914 REG_EXTENDED
| REG_NEWLINE
))
1915 die ("Invalid regular expression: %s",
1918 for (i
= 0; i
< ARRAY_SIZE(diff_words_styles
); i
++) {
1919 if (o
->word_diff
== diff_words_styles
[i
].type
) {
1920 ecbdata
->diff_words
->style
=
1921 &diff_words_styles
[i
];
1925 if (want_color(o
->use_color
)) {
1926 struct diff_words_style
*st
= ecbdata
->diff_words
->style
;
1927 st
->old
.color
= diff_get_color_opt(o
, DIFF_FILE_OLD
);
1928 st
->new.color
= diff_get_color_opt(o
, DIFF_FILE_NEW
);
1929 st
->ctx
.color
= diff_get_color_opt(o
, DIFF_CONTEXT
);
1933 static void free_diff_words_data(struct emit_callback
*ecbdata
)
1935 if (ecbdata
->diff_words
) {
1936 diff_words_flush(ecbdata
);
1937 free (ecbdata
->diff_words
->opt
->emitted_symbols
);
1938 free (ecbdata
->diff_words
->opt
);
1939 free (ecbdata
->diff_words
->minus
.text
.ptr
);
1940 free (ecbdata
->diff_words
->minus
.orig
);
1941 free (ecbdata
->diff_words
->plus
.text
.ptr
);
1942 free (ecbdata
->diff_words
->plus
.orig
);
1943 if (ecbdata
->diff_words
->word_regex
) {
1944 regfree(ecbdata
->diff_words
->word_regex
);
1945 free(ecbdata
->diff_words
->word_regex
);
1947 FREE_AND_NULL(ecbdata
->diff_words
);
1951 const char *diff_get_color(int diff_use_color
, enum color_diff ix
)
1953 if (want_color(diff_use_color
))
1954 return diff_colors
[ix
];
1958 const char *diff_line_prefix(struct diff_options
*opt
)
1960 struct strbuf
*msgbuf
;
1961 if (!opt
->output_prefix
)
1964 msgbuf
= opt
->output_prefix(opt
, opt
->output_prefix_data
);
1968 static unsigned long sane_truncate_line(struct emit_callback
*ecb
, char *line
, unsigned long len
)
1971 unsigned long allot
;
1975 return ecb
->truncate(line
, len
);
1979 (void) utf8_width(&cp
, &l
);
1981 break; /* truncated in the middle? */
1986 static void find_lno(const char *line
, struct emit_callback
*ecbdata
)
1989 ecbdata
->lno_in_preimage
= 0;
1990 ecbdata
->lno_in_postimage
= 0;
1991 p
= strchr(line
, '-');
1993 return; /* cannot happen */
1994 ecbdata
->lno_in_preimage
= strtol(p
+ 1, NULL
, 10);
1997 return; /* cannot happen */
1998 ecbdata
->lno_in_postimage
= strtol(p
+ 1, NULL
, 10);
2001 static void fn_out_consume(void *priv
, char *line
, unsigned long len
)
2003 struct emit_callback
*ecbdata
= priv
;
2004 const char *reset
= diff_get_color(ecbdata
->color_diff
, DIFF_RESET
);
2005 struct diff_options
*o
= ecbdata
->opt
;
2007 o
->found_changes
= 1;
2009 if (ecbdata
->header
) {
2010 emit_diff_symbol(o
, DIFF_SYMBOL_HEADER
,
2011 ecbdata
->header
->buf
, ecbdata
->header
->len
, 0);
2012 strbuf_reset(ecbdata
->header
);
2013 ecbdata
->header
= NULL
;
2016 if (ecbdata
->label_path
[0]) {
2017 emit_diff_symbol(o
, DIFF_SYMBOL_FILEPAIR_MINUS
,
2018 ecbdata
->label_path
[0],
2019 strlen(ecbdata
->label_path
[0]), 0);
2020 emit_diff_symbol(o
, DIFF_SYMBOL_FILEPAIR_PLUS
,
2021 ecbdata
->label_path
[1],
2022 strlen(ecbdata
->label_path
[1]), 0);
2023 ecbdata
->label_path
[0] = ecbdata
->label_path
[1] = NULL
;
2026 if (diff_suppress_blank_empty
2027 && len
== 2 && line
[0] == ' ' && line
[1] == '\n') {
2032 if (line
[0] == '@') {
2033 if (ecbdata
->diff_words
)
2034 diff_words_flush(ecbdata
);
2035 len
= sane_truncate_line(ecbdata
, line
, len
);
2036 find_lno(line
, ecbdata
);
2037 emit_hunk_header(ecbdata
, line
, len
);
2041 if (ecbdata
->diff_words
) {
2042 enum diff_symbol s
=
2043 ecbdata
->diff_words
->type
== DIFF_WORDS_PORCELAIN
?
2044 DIFF_SYMBOL_WORDS_PORCELAIN
: DIFF_SYMBOL_WORDS
;
2045 if (line
[0] == '-') {
2046 diff_words_append(line
, len
,
2047 &ecbdata
->diff_words
->minus
);
2049 } else if (line
[0] == '+') {
2050 diff_words_append(line
, len
,
2051 &ecbdata
->diff_words
->plus
);
2053 } else if (starts_with(line
, "\\ ")) {
2055 * Eat the "no newline at eof" marker as if we
2056 * saw a "+" or "-" line with nothing on it,
2057 * and return without diff_words_flush() to
2058 * defer processing. If this is the end of
2059 * preimage, more "+" lines may come after it.
2063 diff_words_flush(ecbdata
);
2064 emit_diff_symbol(o
, s
, line
, len
, 0);
2070 ecbdata
->lno_in_postimage
++;
2071 emit_add_line(reset
, ecbdata
, line
+ 1, len
- 1);
2074 ecbdata
->lno_in_preimage
++;
2075 emit_del_line(reset
, ecbdata
, line
+ 1, len
- 1);
2078 ecbdata
->lno_in_postimage
++;
2079 ecbdata
->lno_in_preimage
++;
2080 emit_context_line(reset
, ecbdata
, line
+ 1, len
- 1);
2083 /* incomplete line at the end */
2084 ecbdata
->lno_in_preimage
++;
2085 emit_diff_symbol(o
, DIFF_SYMBOL_CONTEXT_INCOMPLETE
,
2091 static char *pprint_rename(const char *a
, const char *b
)
2093 const char *old
= a
;
2094 const char *new = b
;
2095 struct strbuf name
= STRBUF_INIT
;
2096 int pfx_length
, sfx_length
;
2097 int pfx_adjust_for_slash
;
2098 int len_a
= strlen(a
);
2099 int len_b
= strlen(b
);
2100 int a_midlen
, b_midlen
;
2101 int qlen_a
= quote_c_style(a
, NULL
, NULL
, 0);
2102 int qlen_b
= quote_c_style(b
, NULL
, NULL
, 0);
2104 if (qlen_a
|| qlen_b
) {
2105 quote_c_style(a
, &name
, NULL
, 0);
2106 strbuf_addstr(&name
, " => ");
2107 quote_c_style(b
, &name
, NULL
, 0);
2108 return strbuf_detach(&name
, NULL
);
2111 /* Find common prefix */
2113 while (*old
&& *new && *old
== *new) {
2115 pfx_length
= old
- a
+ 1;
2120 /* Find common suffix */
2125 * If there is a common prefix, it must end in a slash. In
2126 * that case we let this loop run 1 into the prefix to see the
2129 * If there is no common prefix, we cannot do this as it would
2130 * underrun the input strings.
2132 pfx_adjust_for_slash
= (pfx_length
? 1 : 0);
2133 while (a
+ pfx_length
- pfx_adjust_for_slash
<= old
&&
2134 b
+ pfx_length
- pfx_adjust_for_slash
<= new &&
2137 sfx_length
= len_a
- (old
- a
);
2143 * pfx{mid-a => mid-b}sfx
2144 * {pfx-a => pfx-b}sfx
2145 * pfx{sfx-a => sfx-b}
2148 a_midlen
= len_a
- pfx_length
- sfx_length
;
2149 b_midlen
= len_b
- pfx_length
- sfx_length
;
2155 strbuf_grow(&name
, pfx_length
+ a_midlen
+ b_midlen
+ sfx_length
+ 7);
2156 if (pfx_length
+ sfx_length
) {
2157 strbuf_add(&name
, a
, pfx_length
);
2158 strbuf_addch(&name
, '{');
2160 strbuf_add(&name
, a
+ pfx_length
, a_midlen
);
2161 strbuf_addstr(&name
, " => ");
2162 strbuf_add(&name
, b
+ pfx_length
, b_midlen
);
2163 if (pfx_length
+ sfx_length
) {
2164 strbuf_addch(&name
, '}');
2165 strbuf_add(&name
, a
+ len_a
- sfx_length
, sfx_length
);
2167 return strbuf_detach(&name
, NULL
);
2173 struct diffstat_file
{
2177 unsigned is_unmerged
:1;
2178 unsigned is_binary
:1;
2179 unsigned is_renamed
:1;
2180 unsigned is_interesting
:1;
2181 uintmax_t added
, deleted
;
2185 static struct diffstat_file
*diffstat_add(struct diffstat_t
*diffstat
,
2189 struct diffstat_file
*x
;
2190 x
= xcalloc(1, sizeof(*x
));
2191 ALLOC_GROW(diffstat
->files
, diffstat
->nr
+ 1, diffstat
->alloc
);
2192 diffstat
->files
[diffstat
->nr
++] = x
;
2194 x
->from_name
= xstrdup(name_a
);
2195 x
->name
= xstrdup(name_b
);
2199 x
->from_name
= NULL
;
2200 x
->name
= xstrdup(name_a
);
2205 static void diffstat_consume(void *priv
, char *line
, unsigned long len
)
2207 struct diffstat_t
*diffstat
= priv
;
2208 struct diffstat_file
*x
= diffstat
->files
[diffstat
->nr
- 1];
2212 else if (line
[0] == '-')
2216 const char mime_boundary_leader
[] = "------------";
2218 static int scale_linear(int it
, int width
, int max_change
)
2223 * make sure that at least one '-' or '+' is printed if
2224 * there is any change to this path. The easiest way is to
2225 * scale linearly as if the alloted width is one column shorter
2226 * than it is, and then add 1 to the result.
2228 return 1 + (it
* (width
- 1) / max_change
);
2231 static void show_graph(struct strbuf
*out
, char ch
, int cnt
,
2232 const char *set
, const char *reset
)
2236 strbuf_addstr(out
, set
);
2237 strbuf_addchars(out
, ch
, cnt
);
2238 strbuf_addstr(out
, reset
);
2241 static void fill_print_name(struct diffstat_file
*file
)
2245 if (file
->print_name
)
2248 if (!file
->is_renamed
) {
2249 struct strbuf buf
= STRBUF_INIT
;
2250 if (quote_c_style(file
->name
, &buf
, NULL
, 0)) {
2251 pname
= strbuf_detach(&buf
, NULL
);
2254 strbuf_release(&buf
);
2257 pname
= pprint_rename(file
->from_name
, file
->name
);
2259 file
->print_name
= pname
;
2262 static void print_stat_summary_inserts_deletes(struct diff_options
*options
,
2263 int files
, int insertions
, int deletions
)
2265 struct strbuf sb
= STRBUF_INIT
;
2268 assert(insertions
== 0 && deletions
== 0);
2269 emit_diff_symbol(options
, DIFF_SYMBOL_STATS_SUMMARY_NO_FILES
,
2275 (files
== 1) ? " %d file changed" : " %d files changed",
2279 * For binary diff, the caller may want to print "x files
2280 * changed" with insertions == 0 && deletions == 0.
2282 * Not omitting "0 insertions(+), 0 deletions(-)" in this case
2283 * is probably less confusing (i.e skip over "2 files changed
2284 * but nothing about added/removed lines? Is this a bug in Git?").
2286 if (insertions
|| deletions
== 0) {
2288 (insertions
== 1) ? ", %d insertion(+)" : ", %d insertions(+)",
2292 if (deletions
|| insertions
== 0) {
2294 (deletions
== 1) ? ", %d deletion(-)" : ", %d deletions(-)",
2297 strbuf_addch(&sb
, '\n');
2298 emit_diff_symbol(options
, DIFF_SYMBOL_STATS_SUMMARY_INSERTS_DELETES
,
2300 strbuf_release(&sb
);
2303 void print_stat_summary(FILE *fp
, int files
,
2304 int insertions
, int deletions
)
2306 struct diff_options o
;
2307 memset(&o
, 0, sizeof(o
));
2310 print_stat_summary_inserts_deletes(&o
, files
, insertions
, deletions
);
2313 static void show_stats(struct diffstat_t
*data
, struct diff_options
*options
)
2315 int i
, len
, add
, del
, adds
= 0, dels
= 0;
2316 uintmax_t max_change
= 0, max_len
= 0;
2317 int total_files
= data
->nr
, count
;
2318 int width
, name_width
, graph_width
, number_width
= 0, bin_width
= 0;
2319 const char *reset
, *add_c
, *del_c
;
2320 int extra_shown
= 0;
2321 const char *line_prefix
= diff_line_prefix(options
);
2322 struct strbuf out
= STRBUF_INIT
;
2327 count
= options
->stat_count
? options
->stat_count
: data
->nr
;
2329 reset
= diff_get_color_opt(options
, DIFF_RESET
);
2330 add_c
= diff_get_color_opt(options
, DIFF_FILE_NEW
);
2331 del_c
= diff_get_color_opt(options
, DIFF_FILE_OLD
);
2334 * Find the longest filename and max number of changes
2336 for (i
= 0; (i
< count
) && (i
< data
->nr
); i
++) {
2337 struct diffstat_file
*file
= data
->files
[i
];
2338 uintmax_t change
= file
->added
+ file
->deleted
;
2340 if (!file
->is_interesting
&& (change
== 0)) {
2341 count
++; /* not shown == room for one more */
2344 fill_print_name(file
);
2345 len
= strlen(file
->print_name
);
2349 if (file
->is_unmerged
) {
2350 /* "Unmerged" is 8 characters */
2351 bin_width
= bin_width
< 8 ? 8 : bin_width
;
2354 if (file
->is_binary
) {
2355 /* "Bin XXX -> YYY bytes" */
2356 int w
= 14 + decimal_width(file
->added
)
2357 + decimal_width(file
->deleted
);
2358 bin_width
= bin_width
< w
? w
: bin_width
;
2359 /* Display change counts aligned with "Bin" */
2364 if (max_change
< change
)
2365 max_change
= change
;
2367 count
= i
; /* where we can stop scanning in data->files[] */
2370 * We have width = stat_width or term_columns() columns total.
2371 * We want a maximum of min(max_len, stat_name_width) for the name part.
2372 * We want a maximum of min(max_change, stat_graph_width) for the +- part.
2373 * We also need 1 for " " and 4 + decimal_width(max_change)
2374 * for " | NNNN " and one the empty column at the end, altogether
2375 * 6 + decimal_width(max_change).
2377 * If there's not enough space, we will use the smaller of
2378 * stat_name_width (if set) and 5/8*width for the filename,
2379 * and the rest for constant elements + graph part, but no more
2380 * than stat_graph_width for the graph part.
2381 * (5/8 gives 50 for filename and 30 for the constant parts + graph
2382 * for the standard terminal size).
2384 * In other words: stat_width limits the maximum width, and
2385 * stat_name_width fixes the maximum width of the filename,
2386 * and is also used to divide available columns if there
2389 * Binary files are displayed with "Bin XXX -> YYY bytes"
2390 * instead of the change count and graph. This part is treated
2391 * similarly to the graph part, except that it is not
2392 * "scaled". If total width is too small to accommodate the
2393 * guaranteed minimum width of the filename part and the
2394 * separators and this message, this message will "overflow"
2395 * making the line longer than the maximum width.
2398 if (options
->stat_width
== -1)
2399 width
= term_columns() - strlen(line_prefix
);
2401 width
= options
->stat_width
? options
->stat_width
: 80;
2402 number_width
= decimal_width(max_change
) > number_width
?
2403 decimal_width(max_change
) : number_width
;
2405 if (options
->stat_graph_width
== -1)
2406 options
->stat_graph_width
= diff_stat_graph_width
;
2409 * Guarantee 3/8*16==6 for the graph part
2410 * and 5/8*16==10 for the filename part
2412 if (width
< 16 + 6 + number_width
)
2413 width
= 16 + 6 + number_width
;
2416 * First assign sizes that are wanted, ignoring available width.
2417 * strlen("Bin XXX -> YYY bytes") == bin_width, and the part
2418 * starting from "XXX" should fit in graph_width.
2420 graph_width
= max_change
+ 4 > bin_width
? max_change
: bin_width
- 4;
2421 if (options
->stat_graph_width
&&
2422 options
->stat_graph_width
< graph_width
)
2423 graph_width
= options
->stat_graph_width
;
2425 name_width
= (options
->stat_name_width
> 0 &&
2426 options
->stat_name_width
< max_len
) ?
2427 options
->stat_name_width
: max_len
;
2430 * Adjust adjustable widths not to exceed maximum width
2432 if (name_width
+ number_width
+ 6 + graph_width
> width
) {
2433 if (graph_width
> width
* 3/8 - number_width
- 6) {
2434 graph_width
= width
* 3/8 - number_width
- 6;
2435 if (graph_width
< 6)
2439 if (options
->stat_graph_width
&&
2440 graph_width
> options
->stat_graph_width
)
2441 graph_width
= options
->stat_graph_width
;
2442 if (name_width
> width
- number_width
- 6 - graph_width
)
2443 name_width
= width
- number_width
- 6 - graph_width
;
2445 graph_width
= width
- number_width
- 6 - name_width
;
2449 * From here name_width is the width of the name area,
2450 * and graph_width is the width of the graph area.
2451 * max_change is used to scale graph properly.
2453 for (i
= 0; i
< count
; i
++) {
2454 const char *prefix
= "";
2455 struct diffstat_file
*file
= data
->files
[i
];
2456 char *name
= file
->print_name
;
2457 uintmax_t added
= file
->added
;
2458 uintmax_t deleted
= file
->deleted
;
2461 if (!file
->is_interesting
&& (added
+ deleted
== 0))
2465 * "scale" the filename
2468 name_len
= strlen(name
);
2469 if (name_width
< name_len
) {
2473 name
+= name_len
- len
;
2474 slash
= strchr(name
, '/');
2479 if (file
->is_binary
) {
2480 strbuf_addf(&out
, " %s%-*s |", prefix
, len
, name
);
2481 strbuf_addf(&out
, " %*s", number_width
, "Bin");
2482 if (!added
&& !deleted
) {
2483 strbuf_addch(&out
, '\n');
2484 emit_diff_symbol(options
, DIFF_SYMBOL_STATS_LINE
,
2485 out
.buf
, out
.len
, 0);
2489 strbuf_addf(&out
, " %s%"PRIuMAX
"%s",
2490 del_c
, deleted
, reset
);
2491 strbuf_addstr(&out
, " -> ");
2492 strbuf_addf(&out
, "%s%"PRIuMAX
"%s",
2493 add_c
, added
, reset
);
2494 strbuf_addstr(&out
, " bytes\n");
2495 emit_diff_symbol(options
, DIFF_SYMBOL_STATS_LINE
,
2496 out
.buf
, out
.len
, 0);
2500 else if (file
->is_unmerged
) {
2501 strbuf_addf(&out
, " %s%-*s |", prefix
, len
, name
);
2502 strbuf_addstr(&out
, " Unmerged\n");
2503 emit_diff_symbol(options
, DIFF_SYMBOL_STATS_LINE
,
2504 out
.buf
, out
.len
, 0);
2510 * scale the add/delete
2515 if (graph_width
<= max_change
) {
2516 int total
= scale_linear(add
+ del
, graph_width
, max_change
);
2517 if (total
< 2 && add
&& del
)
2518 /* width >= 2 due to the sanity check */
2521 add
= scale_linear(add
, graph_width
, max_change
);
2524 del
= scale_linear(del
, graph_width
, max_change
);
2528 strbuf_addf(&out
, " %s%-*s |", prefix
, len
, name
);
2529 strbuf_addf(&out
, " %*"PRIuMAX
"%s",
2530 number_width
, added
+ deleted
,
2531 added
+ deleted
? " " : "");
2532 show_graph(&out
, '+', add
, add_c
, reset
);
2533 show_graph(&out
, '-', del
, del_c
, reset
);
2534 strbuf_addch(&out
, '\n');
2535 emit_diff_symbol(options
, DIFF_SYMBOL_STATS_LINE
,
2536 out
.buf
, out
.len
, 0);
2540 for (i
= 0; i
< data
->nr
; i
++) {
2541 struct diffstat_file
*file
= data
->files
[i
];
2542 uintmax_t added
= file
->added
;
2543 uintmax_t deleted
= file
->deleted
;
2545 if (file
->is_unmerged
||
2546 (!file
->is_interesting
&& (added
+ deleted
== 0))) {
2551 if (!file
->is_binary
) {
2558 emit_diff_symbol(options
,
2559 DIFF_SYMBOL_STATS_SUMMARY_ABBREV
,
2564 print_stat_summary_inserts_deletes(options
, total_files
, adds
, dels
);
2567 static void show_shortstats(struct diffstat_t
*data
, struct diff_options
*options
)
2569 int i
, adds
= 0, dels
= 0, total_files
= data
->nr
;
2574 for (i
= 0; i
< data
->nr
; i
++) {
2575 int added
= data
->files
[i
]->added
;
2576 int deleted
= data
->files
[i
]->deleted
;
2578 if (data
->files
[i
]->is_unmerged
||
2579 (!data
->files
[i
]->is_interesting
&& (added
+ deleted
== 0))) {
2581 } else if (!data
->files
[i
]->is_binary
) { /* don't count bytes */
2586 print_stat_summary_inserts_deletes(options
, total_files
, adds
, dels
);
2589 static void show_numstat(struct diffstat_t
*data
, struct diff_options
*options
)
2596 for (i
= 0; i
< data
->nr
; i
++) {
2597 struct diffstat_file
*file
= data
->files
[i
];
2599 fprintf(options
->file
, "%s", diff_line_prefix(options
));
2601 if (file
->is_binary
)
2602 fprintf(options
->file
, "-\t-\t");
2604 fprintf(options
->file
,
2605 "%"PRIuMAX
"\t%"PRIuMAX
"\t",
2606 file
->added
, file
->deleted
);
2607 if (options
->line_termination
) {
2608 fill_print_name(file
);
2609 if (!file
->is_renamed
)
2610 write_name_quoted(file
->name
, options
->file
,
2611 options
->line_termination
);
2613 fputs(file
->print_name
, options
->file
);
2614 putc(options
->line_termination
, options
->file
);
2617 if (file
->is_renamed
) {
2618 putc('\0', options
->file
);
2619 write_name_quoted(file
->from_name
, options
->file
, '\0');
2621 write_name_quoted(file
->name
, options
->file
, '\0');
2626 struct dirstat_file
{
2628 unsigned long changed
;
2631 struct dirstat_dir
{
2632 struct dirstat_file
*files
;
2633 int alloc
, nr
, permille
, cumulative
;
2636 static long gather_dirstat(struct diff_options
*opt
, struct dirstat_dir
*dir
,
2637 unsigned long changed
, const char *base
, int baselen
)
2639 unsigned long this_dir
= 0;
2640 unsigned int sources
= 0;
2641 const char *line_prefix
= diff_line_prefix(opt
);
2644 struct dirstat_file
*f
= dir
->files
;
2645 int namelen
= strlen(f
->name
);
2649 if (namelen
< baselen
)
2651 if (memcmp(f
->name
, base
, baselen
))
2653 slash
= strchr(f
->name
+ baselen
, '/');
2655 int newbaselen
= slash
+ 1 - f
->name
;
2656 this = gather_dirstat(opt
, dir
, changed
, f
->name
, newbaselen
);
2668 * We don't report dirstat's for
2670 * - or cases where everything came from a single directory
2671 * under this directory (sources == 1).
2673 if (baselen
&& sources
!= 1) {
2675 int permille
= this_dir
* 1000 / changed
;
2676 if (permille
>= dir
->permille
) {
2677 fprintf(opt
->file
, "%s%4d.%01d%% %.*s\n", line_prefix
,
2678 permille
/ 10, permille
% 10, baselen
, base
);
2679 if (!dir
->cumulative
)
2687 static int dirstat_compare(const void *_a
, const void *_b
)
2689 const struct dirstat_file
*a
= _a
;
2690 const struct dirstat_file
*b
= _b
;
2691 return strcmp(a
->name
, b
->name
);
2694 static void show_dirstat(struct diff_options
*options
)
2697 unsigned long changed
;
2698 struct dirstat_dir dir
;
2699 struct diff_queue_struct
*q
= &diff_queued_diff
;
2704 dir
.permille
= options
->dirstat_permille
;
2705 dir
.cumulative
= DIFF_OPT_TST(options
, DIRSTAT_CUMULATIVE
);
2708 for (i
= 0; i
< q
->nr
; i
++) {
2709 struct diff_filepair
*p
= q
->queue
[i
];
2711 unsigned long copied
, added
, damage
;
2712 int content_changed
;
2714 name
= p
->two
->path
? p
->two
->path
: p
->one
->path
;
2716 if (p
->one
->oid_valid
&& p
->two
->oid_valid
)
2717 content_changed
= oidcmp(&p
->one
->oid
, &p
->two
->oid
);
2719 content_changed
= 1;
2721 if (!content_changed
) {
2723 * The SHA1 has not changed, so pre-/post-content is
2724 * identical. We can therefore skip looking at the
2725 * file contents altogether.
2731 if (DIFF_OPT_TST(options
, DIRSTAT_BY_FILE
)) {
2733 * In --dirstat-by-file mode, we don't really need to
2734 * look at the actual file contents at all.
2735 * The fact that the SHA1 changed is enough for us to
2736 * add this file to the list of results
2737 * (with each file contributing equal damage).
2743 if (DIFF_FILE_VALID(p
->one
) && DIFF_FILE_VALID(p
->two
)) {
2744 diff_populate_filespec(p
->one
, 0);
2745 diff_populate_filespec(p
->two
, 0);
2746 diffcore_count_changes(p
->one
, p
->two
, NULL
, NULL
,
2748 diff_free_filespec_data(p
->one
);
2749 diff_free_filespec_data(p
->two
);
2750 } else if (DIFF_FILE_VALID(p
->one
)) {
2751 diff_populate_filespec(p
->one
, CHECK_SIZE_ONLY
);
2753 diff_free_filespec_data(p
->one
);
2754 } else if (DIFF_FILE_VALID(p
->two
)) {
2755 diff_populate_filespec(p
->two
, CHECK_SIZE_ONLY
);
2757 added
= p
->two
->size
;
2758 diff_free_filespec_data(p
->two
);
2763 * Original minus copied is the removed material,
2764 * added is the new material. They are both damages
2765 * made to the preimage.
2766 * If the resulting damage is zero, we know that
2767 * diffcore_count_changes() considers the two entries to
2768 * be identical, but since content_changed is true, we
2769 * know that there must have been _some_ kind of change,
2770 * so we force all entries to have damage > 0.
2772 damage
= (p
->one
->size
- copied
) + added
;
2777 ALLOC_GROW(dir
.files
, dir
.nr
+ 1, dir
.alloc
);
2778 dir
.files
[dir
.nr
].name
= name
;
2779 dir
.files
[dir
.nr
].changed
= damage
;
2784 /* This can happen even with many files, if everything was renames */
2788 /* Show all directories with more than x% of the changes */
2789 QSORT(dir
.files
, dir
.nr
, dirstat_compare
);
2790 gather_dirstat(options
, &dir
, changed
, "", 0);
2793 static void show_dirstat_by_line(struct diffstat_t
*data
, struct diff_options
*options
)
2796 unsigned long changed
;
2797 struct dirstat_dir dir
;
2805 dir
.permille
= options
->dirstat_permille
;
2806 dir
.cumulative
= DIFF_OPT_TST(options
, DIRSTAT_CUMULATIVE
);
2809 for (i
= 0; i
< data
->nr
; i
++) {
2810 struct diffstat_file
*file
= data
->files
[i
];
2811 unsigned long damage
= file
->added
+ file
->deleted
;
2812 if (file
->is_binary
)
2814 * binary files counts bytes, not lines. Must find some
2815 * way to normalize binary bytes vs. textual lines.
2816 * The following heuristic assumes that there are 64
2818 * This is stupid and ugly, but very cheap...
2820 damage
= (damage
+ 63) / 64;
2821 ALLOC_GROW(dir
.files
, dir
.nr
+ 1, dir
.alloc
);
2822 dir
.files
[dir
.nr
].name
= file
->name
;
2823 dir
.files
[dir
.nr
].changed
= damage
;
2828 /* This can happen even with many files, if everything was renames */
2832 /* Show all directories with more than x% of the changes */
2833 QSORT(dir
.files
, dir
.nr
, dirstat_compare
);
2834 gather_dirstat(options
, &dir
, changed
, "", 0);
2837 static void free_diffstat_info(struct diffstat_t
*diffstat
)
2840 for (i
= 0; i
< diffstat
->nr
; i
++) {
2841 struct diffstat_file
*f
= diffstat
->files
[i
];
2842 if (f
->name
!= f
->print_name
)
2843 free(f
->print_name
);
2848 free(diffstat
->files
);
2851 struct checkdiff_t
{
2852 const char *filename
;
2854 int conflict_marker_size
;
2855 struct diff_options
*o
;
2860 static int is_conflict_marker(const char *line
, int marker_size
, unsigned long len
)
2865 if (len
< marker_size
+ 1)
2867 firstchar
= line
[0];
2868 switch (firstchar
) {
2869 case '=': case '>': case '<': case '|':
2874 for (cnt
= 1; cnt
< marker_size
; cnt
++)
2875 if (line
[cnt
] != firstchar
)
2877 /* line[1] thru line[marker_size-1] are same as firstchar */
2878 if (len
< marker_size
+ 1 || !isspace(line
[marker_size
]))
2883 static void checkdiff_consume(void *priv
, char *line
, unsigned long len
)
2885 struct checkdiff_t
*data
= priv
;
2886 int marker_size
= data
->conflict_marker_size
;
2887 const char *ws
= diff_get_color(data
->o
->use_color
, DIFF_WHITESPACE
);
2888 const char *reset
= diff_get_color(data
->o
->use_color
, DIFF_RESET
);
2889 const char *set
= diff_get_color(data
->o
->use_color
, DIFF_FILE_NEW
);
2891 const char *line_prefix
;
2894 line_prefix
= diff_line_prefix(data
->o
);
2896 if (line
[0] == '+') {
2899 if (is_conflict_marker(line
+ 1, marker_size
, len
- 1)) {
2901 fprintf(data
->o
->file
,
2902 "%s%s:%d: leftover conflict marker\n",
2903 line_prefix
, data
->filename
, data
->lineno
);
2905 bad
= ws_check(line
+ 1, len
- 1, data
->ws_rule
);
2908 data
->status
|= bad
;
2909 err
= whitespace_error_string(bad
);
2910 fprintf(data
->o
->file
, "%s%s:%d: %s.\n",
2911 line_prefix
, data
->filename
, data
->lineno
, err
);
2913 emit_line(data
->o
, set
, reset
, line
, 1);
2914 ws_check_emit(line
+ 1, len
- 1, data
->ws_rule
,
2915 data
->o
->file
, set
, reset
, ws
);
2916 } else if (line
[0] == ' ') {
2918 } else if (line
[0] == '@') {
2919 char *plus
= strchr(line
, '+');
2921 data
->lineno
= strtol(plus
, NULL
, 10) - 1;
2923 die("invalid diff");
2927 static unsigned char *deflate_it(char *data
,
2929 unsigned long *result_size
)
2932 unsigned char *deflated
;
2935 git_deflate_init(&stream
, zlib_compression_level
);
2936 bound
= git_deflate_bound(&stream
, size
);
2937 deflated
= xmalloc(bound
);
2938 stream
.next_out
= deflated
;
2939 stream
.avail_out
= bound
;
2941 stream
.next_in
= (unsigned char *)data
;
2942 stream
.avail_in
= size
;
2943 while (git_deflate(&stream
, Z_FINISH
) == Z_OK
)
2945 git_deflate_end(&stream
);
2946 *result_size
= stream
.total_out
;
2950 static void emit_binary_diff_body(struct diff_options
*o
,
2951 mmfile_t
*one
, mmfile_t
*two
)
2957 unsigned long orig_size
;
2958 unsigned long delta_size
;
2959 unsigned long deflate_size
;
2960 unsigned long data_size
;
2962 /* We could do deflated delta, or we could do just deflated two,
2963 * whichever is smaller.
2966 deflated
= deflate_it(two
->ptr
, two
->size
, &deflate_size
);
2967 if (one
->size
&& two
->size
) {
2968 delta
= diff_delta(one
->ptr
, one
->size
,
2969 two
->ptr
, two
->size
,
2970 &delta_size
, deflate_size
);
2972 void *to_free
= delta
;
2973 orig_size
= delta_size
;
2974 delta
= deflate_it(delta
, delta_size
, &delta_size
);
2979 if (delta
&& delta_size
< deflate_size
) {
2980 char *s
= xstrfmt("%lu", orig_size
);
2981 emit_diff_symbol(o
, DIFF_SYMBOL_BINARY_DIFF_HEADER_DELTA
,
2986 data_size
= delta_size
;
2988 char *s
= xstrfmt("%lu", two
->size
);
2989 emit_diff_symbol(o
, DIFF_SYMBOL_BINARY_DIFF_HEADER_LITERAL
,
2994 data_size
= deflate_size
;
2997 /* emit data encoded in base85 */
3001 int bytes
= (52 < data_size
) ? 52 : data_size
;
3005 line
[0] = bytes
+ 'A' - 1;
3007 line
[0] = bytes
- 26 + 'a' - 1;
3008 encode_85(line
+ 1, cp
, bytes
);
3009 cp
= (char *) cp
+ bytes
;
3015 emit_diff_symbol(o
, DIFF_SYMBOL_BINARY_DIFF_BODY
,
3018 emit_diff_symbol(o
, DIFF_SYMBOL_BINARY_DIFF_FOOTER
, NULL
, 0, 0);
3022 static void emit_binary_diff(struct diff_options
*o
,
3023 mmfile_t
*one
, mmfile_t
*two
)
3025 emit_diff_symbol(o
, DIFF_SYMBOL_BINARY_DIFF_HEADER
, NULL
, 0, 0);
3026 emit_binary_diff_body(o
, one
, two
);
3027 emit_binary_diff_body(o
, two
, one
);
3030 int diff_filespec_is_binary(struct diff_filespec
*one
)
3032 if (one
->is_binary
== -1) {
3033 diff_filespec_load_driver(one
);
3034 if (one
->driver
->binary
!= -1)
3035 one
->is_binary
= one
->driver
->binary
;
3037 if (!one
->data
&& DIFF_FILE_VALID(one
))
3038 diff_populate_filespec(one
, CHECK_BINARY
);
3039 if (one
->is_binary
== -1 && one
->data
)
3040 one
->is_binary
= buffer_is_binary(one
->data
,
3042 if (one
->is_binary
== -1)
3046 return one
->is_binary
;
3049 static const struct userdiff_funcname
*diff_funcname_pattern(struct diff_filespec
*one
)
3051 diff_filespec_load_driver(one
);
3052 return one
->driver
->funcname
.pattern
? &one
->driver
->funcname
: NULL
;
3055 void diff_set_mnemonic_prefix(struct diff_options
*options
, const char *a
, const char *b
)
3057 if (!options
->a_prefix
)
3058 options
->a_prefix
= a
;
3059 if (!options
->b_prefix
)
3060 options
->b_prefix
= b
;
3063 struct userdiff_driver
*get_textconv(struct diff_filespec
*one
)
3065 if (!DIFF_FILE_VALID(one
))
3068 diff_filespec_load_driver(one
);
3069 return userdiff_get_textconv(one
->driver
);
3072 static void builtin_diff(const char *name_a
,
3074 struct diff_filespec
*one
,
3075 struct diff_filespec
*two
,
3076 const char *xfrm_msg
,
3077 int must_show_header
,
3078 struct diff_options
*o
,
3079 int complete_rewrite
)
3083 char *a_one
, *b_two
;
3084 const char *meta
= diff_get_color_opt(o
, DIFF_METAINFO
);
3085 const char *reset
= diff_get_color_opt(o
, DIFF_RESET
);
3086 const char *a_prefix
, *b_prefix
;
3087 struct userdiff_driver
*textconv_one
= NULL
;
3088 struct userdiff_driver
*textconv_two
= NULL
;
3089 struct strbuf header
= STRBUF_INIT
;
3090 const char *line_prefix
= diff_line_prefix(o
);
3092 diff_set_mnemonic_prefix(o
, "a/", "b/");
3093 if (DIFF_OPT_TST(o
, REVERSE_DIFF
)) {
3094 a_prefix
= o
->b_prefix
;
3095 b_prefix
= o
->a_prefix
;
3097 a_prefix
= o
->a_prefix
;
3098 b_prefix
= o
->b_prefix
;
3101 if (o
->submodule_format
== DIFF_SUBMODULE_LOG
&&
3102 (!one
->mode
|| S_ISGITLINK(one
->mode
)) &&
3103 (!two
->mode
|| S_ISGITLINK(two
->mode
))) {
3104 show_submodule_summary(o
, one
->path
? one
->path
: two
->path
,
3105 &one
->oid
, &two
->oid
,
3106 two
->dirty_submodule
);
3108 } else if (o
->submodule_format
== DIFF_SUBMODULE_INLINE_DIFF
&&
3109 (!one
->mode
|| S_ISGITLINK(one
->mode
)) &&
3110 (!two
->mode
|| S_ISGITLINK(two
->mode
))) {
3111 show_submodule_inline_diff(o
, one
->path
? one
->path
: two
->path
,
3112 &one
->oid
, &two
->oid
,
3113 two
->dirty_submodule
);
3117 if (DIFF_OPT_TST(o
, ALLOW_TEXTCONV
)) {
3118 textconv_one
= get_textconv(one
);
3119 textconv_two
= get_textconv(two
);
3122 /* Never use a non-valid filename anywhere if at all possible */
3123 name_a
= DIFF_FILE_VALID(one
) ? name_a
: name_b
;
3124 name_b
= DIFF_FILE_VALID(two
) ? name_b
: name_a
;
3126 a_one
= quote_two(a_prefix
, name_a
+ (*name_a
== '/'));
3127 b_two
= quote_two(b_prefix
, name_b
+ (*name_b
== '/'));
3128 lbl
[0] = DIFF_FILE_VALID(one
) ? a_one
: "/dev/null";
3129 lbl
[1] = DIFF_FILE_VALID(two
) ? b_two
: "/dev/null";
3130 strbuf_addf(&header
, "%s%sdiff --git %s %s%s\n", line_prefix
, meta
, a_one
, b_two
, reset
);
3131 if (lbl
[0][0] == '/') {
3133 strbuf_addf(&header
, "%s%snew file mode %06o%s\n", line_prefix
, meta
, two
->mode
, reset
);
3135 strbuf_addstr(&header
, xfrm_msg
);
3136 must_show_header
= 1;
3138 else if (lbl
[1][0] == '/') {
3139 strbuf_addf(&header
, "%s%sdeleted file mode %06o%s\n", line_prefix
, meta
, one
->mode
, reset
);
3141 strbuf_addstr(&header
, xfrm_msg
);
3142 must_show_header
= 1;
3145 if (one
->mode
!= two
->mode
) {
3146 strbuf_addf(&header
, "%s%sold mode %06o%s\n", line_prefix
, meta
, one
->mode
, reset
);
3147 strbuf_addf(&header
, "%s%snew mode %06o%s\n", line_prefix
, meta
, two
->mode
, reset
);
3148 must_show_header
= 1;
3151 strbuf_addstr(&header
, xfrm_msg
);
3154 * we do not run diff between different kind
3157 if ((one
->mode
^ two
->mode
) & S_IFMT
)
3158 goto free_ab_and_return
;
3159 if (complete_rewrite
&&
3160 (textconv_one
|| !diff_filespec_is_binary(one
)) &&
3161 (textconv_two
|| !diff_filespec_is_binary(two
))) {
3162 emit_diff_symbol(o
, DIFF_SYMBOL_HEADER
,
3163 header
.buf
, header
.len
, 0);
3164 strbuf_reset(&header
);
3165 emit_rewrite_diff(name_a
, name_b
, one
, two
,
3166 textconv_one
, textconv_two
, o
);
3167 o
->found_changes
= 1;
3168 goto free_ab_and_return
;
3172 if (o
->irreversible_delete
&& lbl
[1][0] == '/') {
3173 emit_diff_symbol(o
, DIFF_SYMBOL_HEADER
, header
.buf
,
3175 strbuf_reset(&header
);
3176 goto free_ab_and_return
;
3177 } else if (!DIFF_OPT_TST(o
, TEXT
) &&
3178 ( (!textconv_one
&& diff_filespec_is_binary(one
)) ||
3179 (!textconv_two
&& diff_filespec_is_binary(two
)) )) {
3180 struct strbuf sb
= STRBUF_INIT
;
3181 if (!one
->data
&& !two
->data
&&
3182 S_ISREG(one
->mode
) && S_ISREG(two
->mode
) &&
3183 !DIFF_OPT_TST(o
, BINARY
)) {
3184 if (!oidcmp(&one
->oid
, &two
->oid
)) {
3185 if (must_show_header
)
3186 emit_diff_symbol(o
, DIFF_SYMBOL_HEADER
,
3187 header
.buf
, header
.len
,
3189 goto free_ab_and_return
;
3191 emit_diff_symbol(o
, DIFF_SYMBOL_HEADER
,
3192 header
.buf
, header
.len
, 0);
3193 strbuf_addf(&sb
, "%sBinary files %s and %s differ\n",
3194 diff_line_prefix(o
), lbl
[0], lbl
[1]);
3195 emit_diff_symbol(o
, DIFF_SYMBOL_BINARY_FILES
,
3197 strbuf_release(&sb
);
3198 goto free_ab_and_return
;
3200 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
3201 die("unable to read files to diff");
3202 /* Quite common confusing case */
3203 if (mf1
.size
== mf2
.size
&&
3204 !memcmp(mf1
.ptr
, mf2
.ptr
, mf1
.size
)) {
3205 if (must_show_header
)
3206 emit_diff_symbol(o
, DIFF_SYMBOL_HEADER
,
3207 header
.buf
, header
.len
, 0);
3208 goto free_ab_and_return
;
3210 emit_diff_symbol(o
, DIFF_SYMBOL_HEADER
, header
.buf
, header
.len
, 0);
3211 strbuf_reset(&header
);
3212 if (DIFF_OPT_TST(o
, BINARY
))
3213 emit_binary_diff(o
, &mf1
, &mf2
);
3215 strbuf_addf(&sb
, "%sBinary files %s and %s differ\n",
3216 diff_line_prefix(o
), lbl
[0], lbl
[1]);
3217 emit_diff_symbol(o
, DIFF_SYMBOL_BINARY_FILES
,
3219 strbuf_release(&sb
);
3221 o
->found_changes
= 1;
3223 /* Crazy xdl interfaces.. */
3224 const char *diffopts
= getenv("GIT_DIFF_OPTS");
3228 struct emit_callback ecbdata
;
3229 const struct userdiff_funcname
*pe
;
3231 if (must_show_header
) {
3232 emit_diff_symbol(o
, DIFF_SYMBOL_HEADER
,
3233 header
.buf
, header
.len
, 0);
3234 strbuf_reset(&header
);
3237 mf1
.size
= fill_textconv(textconv_one
, one
, &mf1
.ptr
);
3238 mf2
.size
= fill_textconv(textconv_two
, two
, &mf2
.ptr
);
3240 pe
= diff_funcname_pattern(one
);
3242 pe
= diff_funcname_pattern(two
);
3244 memset(&xpp
, 0, sizeof(xpp
));
3245 memset(&xecfg
, 0, sizeof(xecfg
));
3246 memset(&ecbdata
, 0, sizeof(ecbdata
));
3247 ecbdata
.label_path
= lbl
;
3248 ecbdata
.color_diff
= want_color(o
->use_color
);
3249 ecbdata
.ws_rule
= whitespace_rule(name_b
);
3250 if (ecbdata
.ws_rule
& WS_BLANK_AT_EOF
)
3251 check_blank_at_eof(&mf1
, &mf2
, &ecbdata
);
3253 ecbdata
.header
= header
.len
? &header
: NULL
;
3254 xpp
.flags
= o
->xdl_opts
;
3255 xecfg
.ctxlen
= o
->context
;
3256 xecfg
.interhunkctxlen
= o
->interhunkcontext
;
3257 xecfg
.flags
= XDL_EMIT_FUNCNAMES
;
3258 if (DIFF_OPT_TST(o
, FUNCCONTEXT
))
3259 xecfg
.flags
|= XDL_EMIT_FUNCCONTEXT
;
3261 xdiff_set_find_func(&xecfg
, pe
->pattern
, pe
->cflags
);
3264 else if (skip_prefix(diffopts
, "--unified=", &v
))
3265 xecfg
.ctxlen
= strtoul(v
, NULL
, 10);
3266 else if (skip_prefix(diffopts
, "-u", &v
))
3267 xecfg
.ctxlen
= strtoul(v
, NULL
, 10);
3269 init_diff_words_data(&ecbdata
, o
, one
, two
);
3270 if (xdi_diff_outf(&mf1
, &mf2
, fn_out_consume
, &ecbdata
,
3272 die("unable to generate diff for %s", one
->path
);
3274 free_diff_words_data(&ecbdata
);
3279 xdiff_clear_find_func(&xecfg
);
3283 strbuf_release(&header
);
3284 diff_free_filespec_data(one
);
3285 diff_free_filespec_data(two
);
3291 static void builtin_diffstat(const char *name_a
, const char *name_b
,
3292 struct diff_filespec
*one
,
3293 struct diff_filespec
*two
,
3294 struct diffstat_t
*diffstat
,
3295 struct diff_options
*o
,
3296 struct diff_filepair
*p
)
3299 struct diffstat_file
*data
;
3301 int complete_rewrite
= 0;
3303 if (!DIFF_PAIR_UNMERGED(p
)) {
3304 if (p
->status
== DIFF_STATUS_MODIFIED
&& p
->score
)
3305 complete_rewrite
= 1;
3308 data
= diffstat_add(diffstat
, name_a
, name_b
);
3309 data
->is_interesting
= p
->status
!= DIFF_STATUS_UNKNOWN
;
3312 data
->is_unmerged
= 1;
3316 same_contents
= !oidcmp(&one
->oid
, &two
->oid
);
3318 if (diff_filespec_is_binary(one
) || diff_filespec_is_binary(two
)) {
3319 data
->is_binary
= 1;
3320 if (same_contents
) {
3324 data
->added
= diff_filespec_size(two
);
3325 data
->deleted
= diff_filespec_size(one
);
3329 else if (complete_rewrite
) {
3330 diff_populate_filespec(one
, 0);
3331 diff_populate_filespec(two
, 0);
3332 data
->deleted
= count_lines(one
->data
, one
->size
);
3333 data
->added
= count_lines(two
->data
, two
->size
);
3336 else if (!same_contents
) {
3337 /* Crazy xdl interfaces.. */
3341 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
3342 die("unable to read files to diff");
3344 memset(&xpp
, 0, sizeof(xpp
));
3345 memset(&xecfg
, 0, sizeof(xecfg
));
3346 xpp
.flags
= o
->xdl_opts
;
3347 xecfg
.ctxlen
= o
->context
;
3348 xecfg
.interhunkctxlen
= o
->interhunkcontext
;
3349 if (xdi_diff_outf(&mf1
, &mf2
, diffstat_consume
, diffstat
,
3351 die("unable to generate diffstat for %s", one
->path
);
3354 diff_free_filespec_data(one
);
3355 diff_free_filespec_data(two
);
3358 static void builtin_checkdiff(const char *name_a
, const char *name_b
,
3359 const char *attr_path
,
3360 struct diff_filespec
*one
,
3361 struct diff_filespec
*two
,
3362 struct diff_options
*o
)
3365 struct checkdiff_t data
;
3370 memset(&data
, 0, sizeof(data
));
3371 data
.filename
= name_b
? name_b
: name_a
;
3374 data
.ws_rule
= whitespace_rule(attr_path
);
3375 data
.conflict_marker_size
= ll_merge_marker_size(attr_path
);
3377 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
3378 die("unable to read files to diff");
3381 * All the other codepaths check both sides, but not checking
3382 * the "old" side here is deliberate. We are checking the newly
3383 * introduced changes, and as long as the "new" side is text, we
3384 * can and should check what it introduces.
3386 if (diff_filespec_is_binary(two
))
3387 goto free_and_return
;
3389 /* Crazy xdl interfaces.. */
3393 memset(&xpp
, 0, sizeof(xpp
));
3394 memset(&xecfg
, 0, sizeof(xecfg
));
3395 xecfg
.ctxlen
= 1; /* at least one context line */
3397 if (xdi_diff_outf(&mf1
, &mf2
, checkdiff_consume
, &data
,
3399 die("unable to generate checkdiff for %s", one
->path
);
3401 if (data
.ws_rule
& WS_BLANK_AT_EOF
) {
3402 struct emit_callback ecbdata
;
3405 ecbdata
.ws_rule
= data
.ws_rule
;
3406 check_blank_at_eof(&mf1
, &mf2
, &ecbdata
);
3407 blank_at_eof
= ecbdata
.blank_at_eof_in_postimage
;
3412 err
= whitespace_error_string(WS_BLANK_AT_EOF
);
3413 fprintf(o
->file
, "%s:%d: %s.\n",
3414 data
.filename
, blank_at_eof
, err
);
3415 data
.status
= 1; /* report errors */
3420 diff_free_filespec_data(one
);
3421 diff_free_filespec_data(two
);
3423 DIFF_OPT_SET(o
, CHECK_FAILED
);
3426 struct diff_filespec
*alloc_filespec(const char *path
)
3428 struct diff_filespec
*spec
;
3430 FLEXPTR_ALLOC_STR(spec
, path
, path
);
3432 spec
->is_binary
= -1;
3436 void free_filespec(struct diff_filespec
*spec
)
3438 if (!--spec
->count
) {
3439 diff_free_filespec_data(spec
);
3444 void fill_filespec(struct diff_filespec
*spec
, const struct object_id
*oid
,
3445 int oid_valid
, unsigned short mode
)
3448 spec
->mode
= canon_mode(mode
);
3449 oidcpy(&spec
->oid
, oid
);
3450 spec
->oid_valid
= oid_valid
;
3455 * Given a name and sha1 pair, if the index tells us the file in
3456 * the work tree has that object contents, return true, so that
3457 * prepare_temp_file() does not have to inflate and extract.
3459 static int reuse_worktree_file(const char *name
, const struct object_id
*oid
, int want_file
)
3461 const struct cache_entry
*ce
;
3466 * We do not read the cache ourselves here, because the
3467 * benchmark with my previous version that always reads cache
3468 * shows that it makes things worse for diff-tree comparing
3469 * two linux-2.6 kernel trees in an already checked out work
3470 * tree. This is because most diff-tree comparisons deal with
3471 * only a small number of files, while reading the cache is
3472 * expensive for a large project, and its cost outweighs the
3473 * savings we get by not inflating the object to a temporary
3474 * file. Practically, this code only helps when we are used
3475 * by diff-cache --cached, which does read the cache before
3481 /* We want to avoid the working directory if our caller
3482 * doesn't need the data in a normal file, this system
3483 * is rather slow with its stat/open/mmap/close syscalls,
3484 * and the object is contained in a pack file. The pack
3485 * is probably already open and will be faster to obtain
3486 * the data through than the working directory. Loose
3487 * objects however would tend to be slower as they need
3488 * to be individually opened and inflated.
3490 if (!FAST_WORKING_DIRECTORY
&& !want_file
&& has_sha1_pack(oid
->hash
))
3494 * Similarly, if we'd have to convert the file contents anyway, that
3495 * makes the optimization not worthwhile.
3497 if (!want_file
&& would_convert_to_git(&the_index
, name
))
3501 pos
= cache_name_pos(name
, len
);
3504 ce
= active_cache
[pos
];
3507 * This is not the sha1 we are looking for, or
3508 * unreusable because it is not a regular file.
3510 if (oidcmp(oid
, &ce
->oid
) || !S_ISREG(ce
->ce_mode
))
3514 * If ce is marked as "assume unchanged", there is no
3515 * guarantee that work tree matches what we are looking for.
3517 if ((ce
->ce_flags
& CE_VALID
) || ce_skip_worktree(ce
))
3521 * If ce matches the file in the work tree, we can reuse it.
3523 if (ce_uptodate(ce
) ||
3524 (!lstat(name
, &st
) && !ce_match_stat(ce
, &st
, 0)))
3530 static int diff_populate_gitlink(struct diff_filespec
*s
, int size_only
)
3532 struct strbuf buf
= STRBUF_INIT
;
3535 /* Are we looking at the work tree? */
3536 if (s
->dirty_submodule
)
3539 strbuf_addf(&buf
, "Subproject commit %s%s\n",
3540 oid_to_hex(&s
->oid
), dirty
);
3544 strbuf_release(&buf
);
3546 s
->data
= strbuf_detach(&buf
, NULL
);
3553 * While doing rename detection and pickaxe operation, we may need to
3554 * grab the data for the blob (or file) for our own in-core comparison.
3555 * diff_filespec has data and size fields for this purpose.
3557 int diff_populate_filespec(struct diff_filespec
*s
, unsigned int flags
)
3559 int size_only
= flags
& CHECK_SIZE_ONLY
;
3562 * demote FAIL to WARN to allow inspecting the situation
3563 * instead of refusing.
3565 enum safe_crlf crlf_warn
= (safe_crlf
== SAFE_CRLF_FAIL
3569 if (!DIFF_FILE_VALID(s
))
3570 die("internal error: asking to populate invalid file.");
3571 if (S_ISDIR(s
->mode
))
3577 if (size_only
&& 0 < s
->size
)
3580 if (S_ISGITLINK(s
->mode
))
3581 return diff_populate_gitlink(s
, size_only
);
3583 if (!s
->oid_valid
||
3584 reuse_worktree_file(s
->path
, &s
->oid
, 0)) {
3585 struct strbuf buf
= STRBUF_INIT
;
3589 if (lstat(s
->path
, &st
) < 0) {
3590 if (errno
== ENOENT
) {
3594 s
->data
= (char *)"";
3599 s
->size
= xsize_t(st
.st_size
);
3602 if (S_ISLNK(st
.st_mode
)) {
3603 struct strbuf sb
= STRBUF_INIT
;
3605 if (strbuf_readlink(&sb
, s
->path
, s
->size
))
3608 s
->data
= strbuf_detach(&sb
, NULL
);
3614 * Even if the caller would be happy with getting
3615 * only the size, we cannot return early at this
3616 * point if the path requires us to run the content
3619 if (size_only
&& !would_convert_to_git(&the_index
, s
->path
))
3623 * Note: this check uses xsize_t(st.st_size) that may
3624 * not be the true size of the blob after it goes
3625 * through convert_to_git(). This may not strictly be
3626 * correct, but the whole point of big_file_threshold
3627 * and is_binary check being that we want to avoid
3628 * opening the file and inspecting the contents, this
3631 if ((flags
& CHECK_BINARY
) &&
3632 s
->size
> big_file_threshold
&& s
->is_binary
== -1) {
3636 fd
= open(s
->path
, O_RDONLY
);
3639 s
->data
= xmmap(NULL
, s
->size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
3641 s
->should_munmap
= 1;
3644 * Convert from working tree format to canonical git format
3646 if (convert_to_git(&the_index
, s
->path
, s
->data
, s
->size
, &buf
, crlf_warn
)) {
3648 munmap(s
->data
, s
->size
);
3649 s
->should_munmap
= 0;
3650 s
->data
= strbuf_detach(&buf
, &size
);
3656 enum object_type type
;
3657 if (size_only
|| (flags
& CHECK_BINARY
)) {
3658 type
= sha1_object_info(s
->oid
.hash
, &s
->size
);
3660 die("unable to read %s",
3661 oid_to_hex(&s
->oid
));
3664 if (s
->size
> big_file_threshold
&& s
->is_binary
== -1) {
3669 s
->data
= read_sha1_file(s
->oid
.hash
, &type
, &s
->size
);
3671 die("unable to read %s", oid_to_hex(&s
->oid
));
3677 void diff_free_filespec_blob(struct diff_filespec
*s
)
3681 else if (s
->should_munmap
)
3682 munmap(s
->data
, s
->size
);
3684 if (s
->should_free
|| s
->should_munmap
) {
3685 s
->should_free
= s
->should_munmap
= 0;
3690 void diff_free_filespec_data(struct diff_filespec
*s
)
3692 diff_free_filespec_blob(s
);
3693 FREE_AND_NULL(s
->cnt_data
);
3696 static void prep_temp_blob(const char *path
, struct diff_tempfile
*temp
,
3699 const struct object_id
*oid
,
3703 struct strbuf buf
= STRBUF_INIT
;
3704 struct strbuf
template = STRBUF_INIT
;
3705 char *path_dup
= xstrdup(path
);
3706 const char *base
= basename(path_dup
);
3708 /* Generate "XXXXXX_basename.ext" */
3709 strbuf_addstr(&template, "XXXXXX_");
3710 strbuf_addstr(&template, base
);
3712 fd
= mks_tempfile_ts(&temp
->tempfile
, template.buf
, strlen(base
) + 1);
3714 die_errno("unable to create temp-file");
3715 if (convert_to_working_tree(path
,
3716 (const char *)blob
, (size_t)size
, &buf
)) {
3720 if (write_in_full(fd
, blob
, size
) != size
)
3721 die_errno("unable to write temp-file");
3722 close_tempfile(&temp
->tempfile
);
3723 temp
->name
= get_tempfile_path(&temp
->tempfile
);
3724 oid_to_hex_r(temp
->hex
, oid
);
3725 xsnprintf(temp
->mode
, sizeof(temp
->mode
), "%06o", mode
);
3726 strbuf_release(&buf
);
3727 strbuf_release(&template);
3731 static struct diff_tempfile
*prepare_temp_file(const char *name
,
3732 struct diff_filespec
*one
)
3734 struct diff_tempfile
*temp
= claim_diff_tempfile();
3736 if (!DIFF_FILE_VALID(one
)) {
3738 /* A '-' entry produces this for file-2, and
3739 * a '+' entry produces this for file-1.
3741 temp
->name
= "/dev/null";
3742 xsnprintf(temp
->hex
, sizeof(temp
->hex
), ".");
3743 xsnprintf(temp
->mode
, sizeof(temp
->mode
), ".");
3747 if (!S_ISGITLINK(one
->mode
) &&
3749 reuse_worktree_file(name
, &one
->oid
, 1))) {
3751 if (lstat(name
, &st
) < 0) {
3752 if (errno
== ENOENT
)
3753 goto not_a_valid_file
;
3754 die_errno("stat(%s)", name
);
3756 if (S_ISLNK(st
.st_mode
)) {
3757 struct strbuf sb
= STRBUF_INIT
;
3758 if (strbuf_readlink(&sb
, name
, st
.st_size
) < 0)
3759 die_errno("readlink(%s)", name
);
3760 prep_temp_blob(name
, temp
, sb
.buf
, sb
.len
,
3762 &one
->oid
: &null_oid
),
3764 one
->mode
: S_IFLNK
));
3765 strbuf_release(&sb
);
3768 /* we can borrow from the file in the work tree */
3770 if (!one
->oid_valid
)
3771 oid_to_hex_r(temp
->hex
, &null_oid
);
3773 oid_to_hex_r(temp
->hex
, &one
->oid
);
3774 /* Even though we may sometimes borrow the
3775 * contents from the work tree, we always want
3776 * one->mode. mode is trustworthy even when
3777 * !(one->oid_valid), as long as
3778 * DIFF_FILE_VALID(one).
3780 xsnprintf(temp
->mode
, sizeof(temp
->mode
), "%06o", one
->mode
);
3785 if (diff_populate_filespec(one
, 0))
3786 die("cannot read data blob for %s", one
->path
);
3787 prep_temp_blob(name
, temp
, one
->data
, one
->size
,
3788 &one
->oid
, one
->mode
);
3793 static void add_external_diff_name(struct argv_array
*argv
,
3795 struct diff_filespec
*df
)
3797 struct diff_tempfile
*temp
= prepare_temp_file(name
, df
);
3798 argv_array_push(argv
, temp
->name
);
3799 argv_array_push(argv
, temp
->hex
);
3800 argv_array_push(argv
, temp
->mode
);
3803 /* An external diff command takes:
3805 * diff-cmd name infile1 infile1-sha1 infile1-mode \
3806 * infile2 infile2-sha1 infile2-mode [ rename-to ]
3809 static void run_external_diff(const char *pgm
,
3812 struct diff_filespec
*one
,
3813 struct diff_filespec
*two
,
3814 const char *xfrm_msg
,
3815 int complete_rewrite
,
3816 struct diff_options
*o
)
3818 struct argv_array argv
= ARGV_ARRAY_INIT
;
3819 struct argv_array env
= ARGV_ARRAY_INIT
;
3820 struct diff_queue_struct
*q
= &diff_queued_diff
;
3822 argv_array_push(&argv
, pgm
);
3823 argv_array_push(&argv
, name
);
3826 add_external_diff_name(&argv
, name
, one
);
3828 add_external_diff_name(&argv
, name
, two
);
3830 add_external_diff_name(&argv
, other
, two
);
3831 argv_array_push(&argv
, other
);
3832 argv_array_push(&argv
, xfrm_msg
);
3836 argv_array_pushf(&env
, "GIT_DIFF_PATH_COUNTER=%d", ++o
->diff_path_counter
);
3837 argv_array_pushf(&env
, "GIT_DIFF_PATH_TOTAL=%d", q
->nr
);
3839 if (run_command_v_opt_cd_env(argv
.argv
, RUN_USING_SHELL
, NULL
, env
.argv
))
3840 die(_("external diff died, stopping at %s"), name
);
3843 argv_array_clear(&argv
);
3844 argv_array_clear(&env
);
3847 static int similarity_index(struct diff_filepair
*p
)
3849 return p
->score
* 100 / MAX_SCORE
;
3852 static const char *diff_abbrev_oid(const struct object_id
*oid
, int abbrev
)
3854 if (startup_info
->have_repository
)
3855 return find_unique_abbrev(oid
->hash
, abbrev
);
3857 char *hex
= oid_to_hex(oid
);
3859 abbrev
= FALLBACK_DEFAULT_ABBREV
;
3860 if (abbrev
> GIT_SHA1_HEXSZ
)
3861 die("BUG: oid abbreviation out of range: %d", abbrev
);
3868 static void fill_metainfo(struct strbuf
*msg
,
3871 struct diff_filespec
*one
,
3872 struct diff_filespec
*two
,
3873 struct diff_options
*o
,
3874 struct diff_filepair
*p
,
3875 int *must_show_header
,
3878 const char *set
= diff_get_color(use_color
, DIFF_METAINFO
);
3879 const char *reset
= diff_get_color(use_color
, DIFF_RESET
);
3880 const char *line_prefix
= diff_line_prefix(o
);
3882 *must_show_header
= 1;
3883 strbuf_init(msg
, PATH_MAX
* 2 + 300);
3884 switch (p
->status
) {
3885 case DIFF_STATUS_COPIED
:
3886 strbuf_addf(msg
, "%s%ssimilarity index %d%%",
3887 line_prefix
, set
, similarity_index(p
));
3888 strbuf_addf(msg
, "%s\n%s%scopy from ",
3889 reset
, line_prefix
, set
);
3890 quote_c_style(name
, msg
, NULL
, 0);
3891 strbuf_addf(msg
, "%s\n%s%scopy to ", reset
, line_prefix
, set
);
3892 quote_c_style(other
, msg
, NULL
, 0);
3893 strbuf_addf(msg
, "%s\n", reset
);
3895 case DIFF_STATUS_RENAMED
:
3896 strbuf_addf(msg
, "%s%ssimilarity index %d%%",
3897 line_prefix
, set
, similarity_index(p
));
3898 strbuf_addf(msg
, "%s\n%s%srename from ",
3899 reset
, line_prefix
, set
);
3900 quote_c_style(name
, msg
, NULL
, 0);
3901 strbuf_addf(msg
, "%s\n%s%srename to ",
3902 reset
, line_prefix
, set
);
3903 quote_c_style(other
, msg
, NULL
, 0);
3904 strbuf_addf(msg
, "%s\n", reset
);
3906 case DIFF_STATUS_MODIFIED
:
3908 strbuf_addf(msg
, "%s%sdissimilarity index %d%%%s\n",
3910 set
, similarity_index(p
), reset
);
3915 *must_show_header
= 0;
3917 if (one
&& two
&& oidcmp(&one
->oid
, &two
->oid
)) {
3918 int abbrev
= DIFF_OPT_TST(o
, FULL_INDEX
) ? 40 : DEFAULT_ABBREV
;
3920 if (DIFF_OPT_TST(o
, BINARY
)) {
3922 if ((!fill_mmfile(&mf
, one
) && diff_filespec_is_binary(one
)) ||
3923 (!fill_mmfile(&mf
, two
) && diff_filespec_is_binary(two
)))
3926 strbuf_addf(msg
, "%s%sindex %s..%s", line_prefix
, set
,
3927 diff_abbrev_oid(&one
->oid
, abbrev
),
3928 diff_abbrev_oid(&two
->oid
, abbrev
));
3929 if (one
->mode
== two
->mode
)
3930 strbuf_addf(msg
, " %06o", one
->mode
);
3931 strbuf_addf(msg
, "%s\n", reset
);
3935 static void run_diff_cmd(const char *pgm
,
3938 const char *attr_path
,
3939 struct diff_filespec
*one
,
3940 struct diff_filespec
*two
,
3942 struct diff_options
*o
,
3943 struct diff_filepair
*p
)
3945 const char *xfrm_msg
= NULL
;
3946 int complete_rewrite
= (p
->status
== DIFF_STATUS_MODIFIED
) && p
->score
;
3947 int must_show_header
= 0;
3950 if (DIFF_OPT_TST(o
, ALLOW_EXTERNAL
)) {
3951 struct userdiff_driver
*drv
= userdiff_find_by_path(attr_path
);
3952 if (drv
&& drv
->external
)
3953 pgm
= drv
->external
;
3958 * don't use colors when the header is intended for an
3959 * external diff driver
3961 fill_metainfo(msg
, name
, other
, one
, two
, o
, p
,
3963 want_color(o
->use_color
) && !pgm
);
3964 xfrm_msg
= msg
->len
? msg
->buf
: NULL
;
3968 run_external_diff(pgm
, name
, other
, one
, two
, xfrm_msg
,
3969 complete_rewrite
, o
);
3973 builtin_diff(name
, other
? other
: name
,
3974 one
, two
, xfrm_msg
, must_show_header
,
3975 o
, complete_rewrite
);
3977 fprintf(o
->file
, "* Unmerged path %s\n", name
);
3980 static void diff_fill_oid_info(struct diff_filespec
*one
)
3982 if (DIFF_FILE_VALID(one
)) {
3983 if (!one
->oid_valid
) {
3985 if (one
->is_stdin
) {
3989 if (lstat(one
->path
, &st
) < 0)
3990 die_errno("stat '%s'", one
->path
);
3991 if (index_path(one
->oid
.hash
, one
->path
, &st
, 0))
3992 die("cannot hash %s", one
->path
);
3999 static void strip_prefix(int prefix_length
, const char **namep
, const char **otherp
)
4001 /* Strip the prefix but do not molest /dev/null and absolute paths */
4002 if (*namep
&& **namep
!= '/') {
4003 *namep
+= prefix_length
;
4007 if (*otherp
&& **otherp
!= '/') {
4008 *otherp
+= prefix_length
;
4009 if (**otherp
== '/')
4014 static void run_diff(struct diff_filepair
*p
, struct diff_options
*o
)
4016 const char *pgm
= external_diff();
4018 struct diff_filespec
*one
= p
->one
;
4019 struct diff_filespec
*two
= p
->two
;
4022 const char *attr_path
;
4025 other
= (strcmp(name
, two
->path
) ? two
->path
: NULL
);
4027 if (o
->prefix_length
)
4028 strip_prefix(o
->prefix_length
, &name
, &other
);
4030 if (!DIFF_OPT_TST(o
, ALLOW_EXTERNAL
))
4033 if (DIFF_PAIR_UNMERGED(p
)) {
4034 run_diff_cmd(pgm
, name
, NULL
, attr_path
,
4035 NULL
, NULL
, NULL
, o
, p
);
4039 diff_fill_oid_info(one
);
4040 diff_fill_oid_info(two
);
4043 DIFF_FILE_VALID(one
) && DIFF_FILE_VALID(two
) &&
4044 (S_IFMT
& one
->mode
) != (S_IFMT
& two
->mode
)) {
4046 * a filepair that changes between file and symlink
4047 * needs to be split into deletion and creation.
4049 struct diff_filespec
*null
= alloc_filespec(two
->path
);
4050 run_diff_cmd(NULL
, name
, other
, attr_path
,
4051 one
, null
, &msg
, o
, p
);
4053 strbuf_release(&msg
);
4055 null
= alloc_filespec(one
->path
);
4056 run_diff_cmd(NULL
, name
, other
, attr_path
,
4057 null
, two
, &msg
, o
, p
);
4061 run_diff_cmd(pgm
, name
, other
, attr_path
,
4062 one
, two
, &msg
, o
, p
);
4064 strbuf_release(&msg
);
4067 static void run_diffstat(struct diff_filepair
*p
, struct diff_options
*o
,
4068 struct diffstat_t
*diffstat
)
4073 if (DIFF_PAIR_UNMERGED(p
)) {
4075 builtin_diffstat(p
->one
->path
, NULL
, NULL
, NULL
, diffstat
, o
, p
);
4079 name
= p
->one
->path
;
4080 other
= (strcmp(name
, p
->two
->path
) ? p
->two
->path
: NULL
);
4082 if (o
->prefix_length
)
4083 strip_prefix(o
->prefix_length
, &name
, &other
);
4085 diff_fill_oid_info(p
->one
);
4086 diff_fill_oid_info(p
->two
);
4088 builtin_diffstat(name
, other
, p
->one
, p
->two
, diffstat
, o
, p
);
4091 static void run_checkdiff(struct diff_filepair
*p
, struct diff_options
*o
)
4095 const char *attr_path
;
4097 if (DIFF_PAIR_UNMERGED(p
)) {
4102 name
= p
->one
->path
;
4103 other
= (strcmp(name
, p
->two
->path
) ? p
->two
->path
: NULL
);
4104 attr_path
= other
? other
: name
;
4106 if (o
->prefix_length
)
4107 strip_prefix(o
->prefix_length
, &name
, &other
);
4109 diff_fill_oid_info(p
->one
);
4110 diff_fill_oid_info(p
->two
);
4112 builtin_checkdiff(name
, other
, attr_path
, p
->one
, p
->two
, o
);
4115 void diff_setup(struct diff_options
*options
)
4117 memcpy(options
, &default_diff_options
, sizeof(*options
));
4119 options
->file
= stdout
;
4121 options
->abbrev
= DEFAULT_ABBREV
;
4122 options
->line_termination
= '\n';
4123 options
->break_opt
= -1;
4124 options
->rename_limit
= -1;
4125 options
->dirstat_permille
= diff_dirstat_permille_default
;
4126 options
->context
= diff_context_default
;
4127 options
->interhunkcontext
= diff_interhunk_context_default
;
4128 options
->ws_error_highlight
= ws_error_highlight_default
;
4129 DIFF_OPT_SET(options
, RENAME_EMPTY
);
4131 /* pathchange left =NULL by default */
4132 options
->change
= diff_change
;
4133 options
->add_remove
= diff_addremove
;
4134 options
->use_color
= diff_use_color_default
;
4135 options
->detect_rename
= diff_detect_rename_default
;
4136 options
->xdl_opts
|= diff_algorithm
;
4137 if (diff_indent_heuristic
)
4138 DIFF_XDL_SET(options
, INDENT_HEURISTIC
);
4140 options
->orderfile
= diff_order_file_cfg
;
4142 if (diff_no_prefix
) {
4143 options
->a_prefix
= options
->b_prefix
= "";
4144 } else if (!diff_mnemonic_prefix
) {
4145 options
->a_prefix
= "a/";
4146 options
->b_prefix
= "b/";
4149 options
->color_moved
= diff_color_moved_default
;
4152 void diff_setup_done(struct diff_options
*options
)
4156 if (options
->set_default
)
4157 options
->set_default(options
);
4159 if (options
->output_format
& DIFF_FORMAT_NAME
)
4161 if (options
->output_format
& DIFF_FORMAT_NAME_STATUS
)
4163 if (options
->output_format
& DIFF_FORMAT_CHECKDIFF
)
4165 if (options
->output_format
& DIFF_FORMAT_NO_OUTPUT
)
4168 die(_("--name-only, --name-status, --check and -s are mutually exclusive"));
4171 * Most of the time we can say "there are changes"
4172 * only by checking if there are changed paths, but
4173 * --ignore-whitespace* options force us to look
4177 if (DIFF_XDL_TST(options
, IGNORE_WHITESPACE
) ||
4178 DIFF_XDL_TST(options
, IGNORE_WHITESPACE_CHANGE
) ||
4179 DIFF_XDL_TST(options
, IGNORE_WHITESPACE_AT_EOL
))
4180 DIFF_OPT_SET(options
, DIFF_FROM_CONTENTS
);
4182 DIFF_OPT_CLR(options
, DIFF_FROM_CONTENTS
);
4184 if (DIFF_OPT_TST(options
, FIND_COPIES_HARDER
))
4185 options
->detect_rename
= DIFF_DETECT_COPY
;
4187 if (!DIFF_OPT_TST(options
, RELATIVE_NAME
))
4188 options
->prefix
= NULL
;
4189 if (options
->prefix
)
4190 options
->prefix_length
= strlen(options
->prefix
);
4192 options
->prefix_length
= 0;
4194 if (options
->output_format
& (DIFF_FORMAT_NAME
|
4195 DIFF_FORMAT_NAME_STATUS
|
4196 DIFF_FORMAT_CHECKDIFF
|
4197 DIFF_FORMAT_NO_OUTPUT
))
4198 options
->output_format
&= ~(DIFF_FORMAT_RAW
|
4199 DIFF_FORMAT_NUMSTAT
|
4200 DIFF_FORMAT_DIFFSTAT
|
4201 DIFF_FORMAT_SHORTSTAT
|
4202 DIFF_FORMAT_DIRSTAT
|
4203 DIFF_FORMAT_SUMMARY
|
4207 * These cases always need recursive; we do not drop caller-supplied
4208 * recursive bits for other formats here.
4210 if (options
->output_format
& (DIFF_FORMAT_PATCH
|
4211 DIFF_FORMAT_NUMSTAT
|
4212 DIFF_FORMAT_DIFFSTAT
|
4213 DIFF_FORMAT_SHORTSTAT
|
4214 DIFF_FORMAT_DIRSTAT
|
4215 DIFF_FORMAT_SUMMARY
|
4216 DIFF_FORMAT_CHECKDIFF
))
4217 DIFF_OPT_SET(options
, RECURSIVE
);
4219 * Also pickaxe would not work very well if you do not say recursive
4221 if (options
->pickaxe
)
4222 DIFF_OPT_SET(options
, RECURSIVE
);
4224 * When patches are generated, submodules diffed against the work tree
4225 * must be checked for dirtiness too so it can be shown in the output
4227 if (options
->output_format
& DIFF_FORMAT_PATCH
)
4228 DIFF_OPT_SET(options
, DIRTY_SUBMODULES
);
4230 if (options
->detect_rename
&& options
->rename_limit
< 0)
4231 options
->rename_limit
= diff_rename_limit_default
;
4232 if (options
->setup
& DIFF_SETUP_USE_CACHE
) {
4234 /* read-cache does not die even when it fails
4235 * so it is safe for us to do this here. Also
4236 * it does not smudge active_cache or active_nr
4237 * when it fails, so we do not have to worry about
4238 * cleaning it up ourselves either.
4242 if (40 < options
->abbrev
)
4243 options
->abbrev
= 40; /* full */
4246 * It does not make sense to show the first hit we happened
4247 * to have found. It does not make sense not to return with
4248 * exit code in such a case either.
4250 if (DIFF_OPT_TST(options
, QUICK
)) {
4251 options
->output_format
= DIFF_FORMAT_NO_OUTPUT
;
4252 DIFF_OPT_SET(options
, EXIT_WITH_STATUS
);
4255 options
->diff_path_counter
= 0;
4257 if (DIFF_OPT_TST(options
, FOLLOW_RENAMES
) && options
->pathspec
.nr
!= 1)
4258 die(_("--follow requires exactly one pathspec"));
4260 if (!options
->use_color
|| external_diff())
4261 options
->color_moved
= 0;
4264 static int opt_arg(const char *arg
, int arg_short
, const char *arg_long
, int *val
)
4274 if (c
== arg_short
) {
4278 if (val
&& isdigit(c
)) {
4280 int n
= strtoul(arg
, &end
, 10);
4291 eq
= strchrnul(arg
, '=');
4293 if (!len
|| strncmp(arg
, arg_long
, len
))
4298 if (!isdigit(*++eq
))
4300 n
= strtoul(eq
, &end
, 10);
4308 static int diff_scoreopt_parse(const char *opt
);
4310 static inline int short_opt(char opt
, const char **argv
,
4311 const char **optarg
)
4313 const char *arg
= argv
[0];
4314 if (arg
[0] != '-' || arg
[1] != opt
)
4316 if (arg
[2] != '\0') {
4321 die("Option '%c' requires a value", opt
);
4326 int parse_long_opt(const char *opt
, const char **argv
,
4327 const char **optarg
)
4329 const char *arg
= argv
[0];
4330 if (!skip_prefix(arg
, "--", &arg
))
4332 if (!skip_prefix(arg
, opt
, &arg
))
4334 if (*arg
== '=') { /* stuck form: --option=value */
4340 /* separate form: --option value */
4342 die("Option '--%s' requires a value", opt
);
4347 static int stat_opt(struct diff_options
*options
, const char **av
)
4349 const char *arg
= av
[0];
4351 int width
= options
->stat_width
;
4352 int name_width
= options
->stat_name_width
;
4353 int graph_width
= options
->stat_graph_width
;
4354 int count
= options
->stat_count
;
4357 if (!skip_prefix(arg
, "--stat", &arg
))
4358 die("BUG: stat option does not begin with --stat: %s", arg
);
4363 if (skip_prefix(arg
, "-width", &arg
)) {
4365 width
= strtoul(arg
+ 1, &end
, 10);
4366 else if (!*arg
&& !av
[1])
4367 die_want_option("--stat-width");
4369 width
= strtoul(av
[1], &end
, 10);
4372 } else if (skip_prefix(arg
, "-name-width", &arg
)) {
4374 name_width
= strtoul(arg
+ 1, &end
, 10);
4375 else if (!*arg
&& !av
[1])
4376 die_want_option("--stat-name-width");
4378 name_width
= strtoul(av
[1], &end
, 10);
4381 } else if (skip_prefix(arg
, "-graph-width", &arg
)) {
4383 graph_width
= strtoul(arg
+ 1, &end
, 10);
4384 else if (!*arg
&& !av
[1])
4385 die_want_option("--stat-graph-width");
4387 graph_width
= strtoul(av
[1], &end
, 10);
4390 } else if (skip_prefix(arg
, "-count", &arg
)) {
4392 count
= strtoul(arg
+ 1, &end
, 10);
4393 else if (!*arg
&& !av
[1])
4394 die_want_option("--stat-count");
4396 count
= strtoul(av
[1], &end
, 10);
4402 width
= strtoul(arg
+1, &end
, 10);
4404 name_width
= strtoul(end
+1, &end
, 10);
4406 count
= strtoul(end
+1, &end
, 10);
4409 /* Important! This checks all the error cases! */
4412 options
->output_format
|= DIFF_FORMAT_DIFFSTAT
;
4413 options
->stat_name_width
= name_width
;
4414 options
->stat_graph_width
= graph_width
;
4415 options
->stat_width
= width
;
4416 options
->stat_count
= count
;
4420 static int parse_dirstat_opt(struct diff_options
*options
, const char *params
)
4422 struct strbuf errmsg
= STRBUF_INIT
;
4423 if (parse_dirstat_params(options
, params
, &errmsg
))
4424 die(_("Failed to parse --dirstat/-X option parameter:\n%s"),
4426 strbuf_release(&errmsg
);
4428 * The caller knows a dirstat-related option is given from the command
4429 * line; allow it to say "return this_function();"
4431 options
->output_format
|= DIFF_FORMAT_DIRSTAT
;
4435 static int parse_submodule_opt(struct diff_options
*options
, const char *value
)
4437 if (parse_submodule_params(options
, value
))
4438 die(_("Failed to parse --submodule option parameter: '%s'"),
4443 static const char diff_status_letters
[] = {
4446 DIFF_STATUS_DELETED
,
4447 DIFF_STATUS_MODIFIED
,
4448 DIFF_STATUS_RENAMED
,
4449 DIFF_STATUS_TYPE_CHANGED
,
4450 DIFF_STATUS_UNKNOWN
,
4451 DIFF_STATUS_UNMERGED
,
4452 DIFF_STATUS_FILTER_AON
,
4453 DIFF_STATUS_FILTER_BROKEN
,
4457 static unsigned int filter_bit
['Z' + 1];
4459 static void prepare_filter_bits(void)
4463 if (!filter_bit
[DIFF_STATUS_ADDED
]) {
4464 for (i
= 0; diff_status_letters
[i
]; i
++)
4465 filter_bit
[(int) diff_status_letters
[i
]] = (1 << i
);
4469 static unsigned filter_bit_tst(char status
, const struct diff_options
*opt
)
4471 return opt
->filter
& filter_bit
[(int) status
];
4474 static int parse_diff_filter_opt(const char *optarg
, struct diff_options
*opt
)
4478 prepare_filter_bits();
4481 * If there is a negation e.g. 'd' in the input, and we haven't
4482 * initialized the filter field with another --diff-filter, start
4483 * from full set of bits, except for AON.
4486 for (i
= 0; (optch
= optarg
[i
]) != '\0'; i
++) {
4487 if (optch
< 'a' || 'z' < optch
)
4489 opt
->filter
= (1 << (ARRAY_SIZE(diff_status_letters
) - 1)) - 1;
4490 opt
->filter
&= ~filter_bit
[DIFF_STATUS_FILTER_AON
];
4495 for (i
= 0; (optch
= optarg
[i
]) != '\0'; i
++) {
4499 if ('a' <= optch
&& optch
<= 'z') {
4501 optch
= toupper(optch
);
4506 bit
= (0 <= optch
&& optch
<= 'Z') ? filter_bit
[optch
] : 0;
4510 opt
->filter
&= ~bit
;
4517 static void enable_patch_output(int *fmt
) {
4518 *fmt
&= ~DIFF_FORMAT_NO_OUTPUT
;
4519 *fmt
|= DIFF_FORMAT_PATCH
;
4522 static int parse_ws_error_highlight_opt(struct diff_options
*opt
, const char *arg
)
4524 int val
= parse_ws_error_highlight(arg
);
4527 error("unknown value after ws-error-highlight=%.*s",
4531 opt
->ws_error_highlight
= val
;
4535 int diff_opt_parse(struct diff_options
*options
,
4536 const char **av
, int ac
, const char *prefix
)
4538 const char *arg
= av
[0];
4545 /* Output format options */
4546 if (!strcmp(arg
, "-p") || !strcmp(arg
, "-u") || !strcmp(arg
, "--patch")
4547 || opt_arg(arg
, 'U', "unified", &options
->context
))
4548 enable_patch_output(&options
->output_format
);
4549 else if (!strcmp(arg
, "--raw"))
4550 options
->output_format
|= DIFF_FORMAT_RAW
;
4551 else if (!strcmp(arg
, "--patch-with-raw")) {
4552 enable_patch_output(&options
->output_format
);
4553 options
->output_format
|= DIFF_FORMAT_RAW
;
4554 } else if (!strcmp(arg
, "--numstat"))
4555 options
->output_format
|= DIFF_FORMAT_NUMSTAT
;
4556 else if (!strcmp(arg
, "--shortstat"))
4557 options
->output_format
|= DIFF_FORMAT_SHORTSTAT
;
4558 else if (!strcmp(arg
, "-X") || !strcmp(arg
, "--dirstat"))
4559 return parse_dirstat_opt(options
, "");
4560 else if (skip_prefix(arg
, "-X", &arg
))
4561 return parse_dirstat_opt(options
, arg
);
4562 else if (skip_prefix(arg
, "--dirstat=", &arg
))
4563 return parse_dirstat_opt(options
, arg
);
4564 else if (!strcmp(arg
, "--cumulative"))
4565 return parse_dirstat_opt(options
, "cumulative");
4566 else if (!strcmp(arg
, "--dirstat-by-file"))
4567 return parse_dirstat_opt(options
, "files");
4568 else if (skip_prefix(arg
, "--dirstat-by-file=", &arg
)) {
4569 parse_dirstat_opt(options
, "files");
4570 return parse_dirstat_opt(options
, arg
);
4572 else if (!strcmp(arg
, "--check"))
4573 options
->output_format
|= DIFF_FORMAT_CHECKDIFF
;
4574 else if (!strcmp(arg
, "--summary"))
4575 options
->output_format
|= DIFF_FORMAT_SUMMARY
;
4576 else if (!strcmp(arg
, "--patch-with-stat")) {
4577 enable_patch_output(&options
->output_format
);
4578 options
->output_format
|= DIFF_FORMAT_DIFFSTAT
;
4579 } else if (!strcmp(arg
, "--name-only"))
4580 options
->output_format
|= DIFF_FORMAT_NAME
;
4581 else if (!strcmp(arg
, "--name-status"))
4582 options
->output_format
|= DIFF_FORMAT_NAME_STATUS
;
4583 else if (!strcmp(arg
, "-s") || !strcmp(arg
, "--no-patch"))
4584 options
->output_format
|= DIFF_FORMAT_NO_OUTPUT
;
4585 else if (starts_with(arg
, "--stat"))
4586 /* --stat, --stat-width, --stat-name-width, or --stat-count */
4587 return stat_opt(options
, av
);
4589 /* renames options */
4590 else if (starts_with(arg
, "-B") || starts_with(arg
, "--break-rewrites=") ||
4591 !strcmp(arg
, "--break-rewrites")) {
4592 if ((options
->break_opt
= diff_scoreopt_parse(arg
)) == -1)
4593 return error("invalid argument to -B: %s", arg
+2);
4595 else if (starts_with(arg
, "-M") || starts_with(arg
, "--find-renames=") ||
4596 !strcmp(arg
, "--find-renames")) {
4597 if ((options
->rename_score
= diff_scoreopt_parse(arg
)) == -1)
4598 return error("invalid argument to -M: %s", arg
+2);
4599 options
->detect_rename
= DIFF_DETECT_RENAME
;
4601 else if (!strcmp(arg
, "-D") || !strcmp(arg
, "--irreversible-delete")) {
4602 options
->irreversible_delete
= 1;
4604 else if (starts_with(arg
, "-C") || starts_with(arg
, "--find-copies=") ||
4605 !strcmp(arg
, "--find-copies")) {
4606 if (options
->detect_rename
== DIFF_DETECT_COPY
)
4607 DIFF_OPT_SET(options
, FIND_COPIES_HARDER
);
4608 if ((options
->rename_score
= diff_scoreopt_parse(arg
)) == -1)
4609 return error("invalid argument to -C: %s", arg
+2);
4610 options
->detect_rename
= DIFF_DETECT_COPY
;
4612 else if (!strcmp(arg
, "--no-renames"))
4613 options
->detect_rename
= 0;
4614 else if (!strcmp(arg
, "--rename-empty"))
4615 DIFF_OPT_SET(options
, RENAME_EMPTY
);
4616 else if (!strcmp(arg
, "--no-rename-empty"))
4617 DIFF_OPT_CLR(options
, RENAME_EMPTY
);
4618 else if (!strcmp(arg
, "--relative"))
4619 DIFF_OPT_SET(options
, RELATIVE_NAME
);
4620 else if (skip_prefix(arg
, "--relative=", &arg
)) {
4621 DIFF_OPT_SET(options
, RELATIVE_NAME
);
4622 options
->prefix
= arg
;
4626 else if (!strcmp(arg
, "--minimal"))
4627 DIFF_XDL_SET(options
, NEED_MINIMAL
);
4628 else if (!strcmp(arg
, "--no-minimal"))
4629 DIFF_XDL_CLR(options
, NEED_MINIMAL
);
4630 else if (!strcmp(arg
, "-w") || !strcmp(arg
, "--ignore-all-space"))
4631 DIFF_XDL_SET(options
, IGNORE_WHITESPACE
);
4632 else if (!strcmp(arg
, "-b") || !strcmp(arg
, "--ignore-space-change"))
4633 DIFF_XDL_SET(options
, IGNORE_WHITESPACE_CHANGE
);
4634 else if (!strcmp(arg
, "--ignore-space-at-eol"))
4635 DIFF_XDL_SET(options
, IGNORE_WHITESPACE_AT_EOL
);
4636 else if (!strcmp(arg
, "--ignore-blank-lines"))
4637 DIFF_XDL_SET(options
, IGNORE_BLANK_LINES
);
4638 else if (!strcmp(arg
, "--indent-heuristic"))
4639 DIFF_XDL_SET(options
, INDENT_HEURISTIC
);
4640 else if (!strcmp(arg
, "--no-indent-heuristic"))
4641 DIFF_XDL_CLR(options
, INDENT_HEURISTIC
);
4642 else if (!strcmp(arg
, "--patience"))
4643 options
->xdl_opts
= DIFF_WITH_ALG(options
, PATIENCE_DIFF
);
4644 else if (!strcmp(arg
, "--histogram"))
4645 options
->xdl_opts
= DIFF_WITH_ALG(options
, HISTOGRAM_DIFF
);
4646 else if ((argcount
= parse_long_opt("diff-algorithm", av
, &optarg
))) {
4647 long value
= parse_algorithm_value(optarg
);
4649 return error("option diff-algorithm accepts \"myers\", "
4650 "\"minimal\", \"patience\" and \"histogram\"");
4651 /* clear out previous settings */
4652 DIFF_XDL_CLR(options
, NEED_MINIMAL
);
4653 options
->xdl_opts
&= ~XDF_DIFF_ALGORITHM_MASK
;
4654 options
->xdl_opts
|= value
;
4659 else if (!strcmp(arg
, "--binary")) {
4660 enable_patch_output(&options
->output_format
);
4661 DIFF_OPT_SET(options
, BINARY
);
4663 else if (!strcmp(arg
, "--full-index"))
4664 DIFF_OPT_SET(options
, FULL_INDEX
);
4665 else if (!strcmp(arg
, "-a") || !strcmp(arg
, "--text"))
4666 DIFF_OPT_SET(options
, TEXT
);
4667 else if (!strcmp(arg
, "-R"))
4668 DIFF_OPT_SET(options
, REVERSE_DIFF
);
4669 else if (!strcmp(arg
, "--find-copies-harder"))
4670 DIFF_OPT_SET(options
, FIND_COPIES_HARDER
);
4671 else if (!strcmp(arg
, "--follow"))
4672 DIFF_OPT_SET(options
, FOLLOW_RENAMES
);
4673 else if (!strcmp(arg
, "--no-follow")) {
4674 DIFF_OPT_CLR(options
, FOLLOW_RENAMES
);
4675 DIFF_OPT_CLR(options
, DEFAULT_FOLLOW_RENAMES
);
4676 } else if (!strcmp(arg
, "--color"))
4677 options
->use_color
= 1;
4678 else if (skip_prefix(arg
, "--color=", &arg
)) {
4679 int value
= git_config_colorbool(NULL
, arg
);
4681 return error("option `color' expects \"always\", \"auto\", or \"never\"");
4682 options
->use_color
= value
;
4684 else if (!strcmp(arg
, "--no-color"))
4685 options
->use_color
= 0;
4686 else if (!strcmp(arg
, "--color-moved")) {
4687 if (diff_color_moved_default
)
4688 options
->color_moved
= diff_color_moved_default
;
4689 if (options
->color_moved
== COLOR_MOVED_NO
)
4690 options
->color_moved
= COLOR_MOVED_DEFAULT
;
4691 } else if (!strcmp(arg
, "--no-color-moved"))
4692 options
->color_moved
= COLOR_MOVED_NO
;
4693 else if (skip_prefix(arg
, "--color-moved=", &arg
)) {
4694 int cm
= parse_color_moved(arg
);
4696 die("bad --color-moved argument: %s", arg
);
4697 options
->color_moved
= cm
;
4698 } else if (!strcmp(arg
, "--color-words")) {
4699 options
->use_color
= 1;
4700 options
->word_diff
= DIFF_WORDS_COLOR
;
4702 else if (skip_prefix(arg
, "--color-words=", &arg
)) {
4703 options
->use_color
= 1;
4704 options
->word_diff
= DIFF_WORDS_COLOR
;
4705 options
->word_regex
= arg
;
4707 else if (!strcmp(arg
, "--word-diff")) {
4708 if (options
->word_diff
== DIFF_WORDS_NONE
)
4709 options
->word_diff
= DIFF_WORDS_PLAIN
;
4711 else if (skip_prefix(arg
, "--word-diff=", &arg
)) {
4712 if (!strcmp(arg
, "plain"))
4713 options
->word_diff
= DIFF_WORDS_PLAIN
;
4714 else if (!strcmp(arg
, "color")) {
4715 options
->use_color
= 1;
4716 options
->word_diff
= DIFF_WORDS_COLOR
;
4718 else if (!strcmp(arg
, "porcelain"))
4719 options
->word_diff
= DIFF_WORDS_PORCELAIN
;
4720 else if (!strcmp(arg
, "none"))
4721 options
->word_diff
= DIFF_WORDS_NONE
;
4723 die("bad --word-diff argument: %s", arg
);
4725 else if ((argcount
= parse_long_opt("word-diff-regex", av
, &optarg
))) {
4726 if (options
->word_diff
== DIFF_WORDS_NONE
)
4727 options
->word_diff
= DIFF_WORDS_PLAIN
;
4728 options
->word_regex
= optarg
;
4731 else if (!strcmp(arg
, "--exit-code"))
4732 DIFF_OPT_SET(options
, EXIT_WITH_STATUS
);
4733 else if (!strcmp(arg
, "--quiet"))
4734 DIFF_OPT_SET(options
, QUICK
);
4735 else if (!strcmp(arg
, "--ext-diff"))
4736 DIFF_OPT_SET(options
, ALLOW_EXTERNAL
);
4737 else if (!strcmp(arg
, "--no-ext-diff"))
4738 DIFF_OPT_CLR(options
, ALLOW_EXTERNAL
);
4739 else if (!strcmp(arg
, "--textconv"))
4740 DIFF_OPT_SET(options
, ALLOW_TEXTCONV
);
4741 else if (!strcmp(arg
, "--no-textconv"))
4742 DIFF_OPT_CLR(options
, ALLOW_TEXTCONV
);
4743 else if (!strcmp(arg
, "--ignore-submodules")) {
4744 DIFF_OPT_SET(options
, OVERRIDE_SUBMODULE_CONFIG
);
4745 handle_ignore_submodules_arg(options
, "all");
4746 } else if (skip_prefix(arg
, "--ignore-submodules=", &arg
)) {
4747 DIFF_OPT_SET(options
, OVERRIDE_SUBMODULE_CONFIG
);
4748 handle_ignore_submodules_arg(options
, arg
);
4749 } else if (!strcmp(arg
, "--submodule"))
4750 options
->submodule_format
= DIFF_SUBMODULE_LOG
;
4751 else if (skip_prefix(arg
, "--submodule=", &arg
))
4752 return parse_submodule_opt(options
, arg
);
4753 else if (skip_prefix(arg
, "--ws-error-highlight=", &arg
))
4754 return parse_ws_error_highlight_opt(options
, arg
);
4755 else if (!strcmp(arg
, "--ita-invisible-in-index"))
4756 options
->ita_invisible_in_index
= 1;
4757 else if (!strcmp(arg
, "--ita-visible-in-index"))
4758 options
->ita_invisible_in_index
= 0;
4761 else if (!strcmp(arg
, "-z"))
4762 options
->line_termination
= 0;
4763 else if ((argcount
= short_opt('l', av
, &optarg
))) {
4764 options
->rename_limit
= strtoul(optarg
, NULL
, 10);
4767 else if ((argcount
= short_opt('S', av
, &optarg
))) {
4768 options
->pickaxe
= optarg
;
4769 options
->pickaxe_opts
|= DIFF_PICKAXE_KIND_S
;
4771 } else if ((argcount
= short_opt('G', av
, &optarg
))) {
4772 options
->pickaxe
= optarg
;
4773 options
->pickaxe_opts
|= DIFF_PICKAXE_KIND_G
;
4776 else if (!strcmp(arg
, "--pickaxe-all"))
4777 options
->pickaxe_opts
|= DIFF_PICKAXE_ALL
;
4778 else if (!strcmp(arg
, "--pickaxe-regex"))
4779 options
->pickaxe_opts
|= DIFF_PICKAXE_REGEX
;
4780 else if ((argcount
= short_opt('O', av
, &optarg
))) {
4781 options
->orderfile
= prefix_filename(prefix
, optarg
);
4784 else if ((argcount
= parse_long_opt("diff-filter", av
, &optarg
))) {
4785 int offending
= parse_diff_filter_opt(optarg
, options
);
4787 die("unknown change class '%c' in --diff-filter=%s",
4791 else if (!strcmp(arg
, "--no-abbrev"))
4792 options
->abbrev
= 0;
4793 else if (!strcmp(arg
, "--abbrev"))
4794 options
->abbrev
= DEFAULT_ABBREV
;
4795 else if (skip_prefix(arg
, "--abbrev=", &arg
)) {
4796 options
->abbrev
= strtoul(arg
, NULL
, 10);
4797 if (options
->abbrev
< MINIMUM_ABBREV
)
4798 options
->abbrev
= MINIMUM_ABBREV
;
4799 else if (40 < options
->abbrev
)
4800 options
->abbrev
= 40;
4802 else if ((argcount
= parse_long_opt("src-prefix", av
, &optarg
))) {
4803 options
->a_prefix
= optarg
;
4806 else if ((argcount
= parse_long_opt("line-prefix", av
, &optarg
))) {
4807 options
->line_prefix
= optarg
;
4808 options
->line_prefix_length
= strlen(options
->line_prefix
);
4809 graph_setup_line_prefix(options
);
4812 else if ((argcount
= parse_long_opt("dst-prefix", av
, &optarg
))) {
4813 options
->b_prefix
= optarg
;
4816 else if (!strcmp(arg
, "--no-prefix"))
4817 options
->a_prefix
= options
->b_prefix
= "";
4818 else if (opt_arg(arg
, '\0', "inter-hunk-context",
4819 &options
->interhunkcontext
))
4821 else if (!strcmp(arg
, "-W"))
4822 DIFF_OPT_SET(options
, FUNCCONTEXT
);
4823 else if (!strcmp(arg
, "--function-context"))
4824 DIFF_OPT_SET(options
, FUNCCONTEXT
);
4825 else if (!strcmp(arg
, "--no-function-context"))
4826 DIFF_OPT_CLR(options
, FUNCCONTEXT
);
4827 else if ((argcount
= parse_long_opt("output", av
, &optarg
))) {
4828 char *path
= prefix_filename(prefix
, optarg
);
4829 options
->file
= xfopen(path
, "w");
4830 options
->close_file
= 1;
4831 if (options
->use_color
!= GIT_COLOR_ALWAYS
)
4832 options
->use_color
= GIT_COLOR_NEVER
;
4840 int parse_rename_score(const char **cp_p
)
4842 unsigned long num
, scale
;
4844 const char *cp
= *cp_p
;
4851 if ( !dot
&& ch
== '.' ) {
4854 } else if ( ch
== '%' ) {
4855 scale
= dot
? scale
*100 : 100;
4856 cp
++; /* % is always at the end */
4858 } else if ( ch
>= '0' && ch
<= '9' ) {
4859 if ( scale
< 100000 ) {
4861 num
= (num
*10) + (ch
-'0');
4870 /* user says num divided by scale and we say internally that
4871 * is MAX_SCORE * num / scale.
4873 return (int)((num
>= scale
) ? MAX_SCORE
: (MAX_SCORE
* num
/ scale
));
4876 static int diff_scoreopt_parse(const char *opt
)
4878 int opt1
, opt2
, cmd
;
4884 /* convert the long-form arguments into short-form versions */
4885 if (skip_prefix(opt
, "break-rewrites", &opt
)) {
4886 if (*opt
== 0 || *opt
++ == '=')
4888 } else if (skip_prefix(opt
, "find-copies", &opt
)) {
4889 if (*opt
== 0 || *opt
++ == '=')
4891 } else if (skip_prefix(opt
, "find-renames", &opt
)) {
4892 if (*opt
== 0 || *opt
++ == '=')
4896 if (cmd
!= 'M' && cmd
!= 'C' && cmd
!= 'B')
4897 return -1; /* that is not a -M, -C, or -B option */
4899 opt1
= parse_rename_score(&opt
);
4905 else if (*opt
!= '/')
4906 return -1; /* we expect -B80/99 or -B80 */
4909 opt2
= parse_rename_score(&opt
);
4914 return opt1
| (opt2
<< 16);
4917 struct diff_queue_struct diff_queued_diff
;
4919 void diff_q(struct diff_queue_struct
*queue
, struct diff_filepair
*dp
)
4921 ALLOC_GROW(queue
->queue
, queue
->nr
+ 1, queue
->alloc
);
4922 queue
->queue
[queue
->nr
++] = dp
;
4925 struct diff_filepair
*diff_queue(struct diff_queue_struct
*queue
,
4926 struct diff_filespec
*one
,
4927 struct diff_filespec
*two
)
4929 struct diff_filepair
*dp
= xcalloc(1, sizeof(*dp
));
4937 void diff_free_filepair(struct diff_filepair
*p
)
4939 free_filespec(p
->one
);
4940 free_filespec(p
->two
);
4944 const char *diff_aligned_abbrev(const struct object_id
*oid
, int len
)
4949 if (len
== GIT_SHA1_HEXSZ
)
4950 return oid_to_hex(oid
);
4952 abbrev
= diff_abbrev_oid(oid
, len
);
4953 abblen
= strlen(abbrev
);
4956 * In well-behaved cases, where the abbbreviated result is the
4957 * same as the requested length, append three dots after the
4958 * abbreviation (hence the whole logic is limited to the case
4959 * where abblen < 37); when the actual abbreviated result is a
4960 * bit longer than the requested length, we reduce the number
4961 * of dots so that they match the well-behaved ones. However,
4962 * if the actual abbreviation is longer than the requested
4963 * length by more than three, we give up on aligning, and add
4964 * three dots anyway, to indicate that the output is not the
4965 * full object name. Yes, this may be suboptimal, but this
4966 * appears only in "diff --raw --abbrev" output and it is not
4967 * worth the effort to change it now. Note that this would
4968 * likely to work fine when the automatic sizing of default
4969 * abbreviation length is used--we would be fed -1 in "len" in
4970 * that case, and will end up always appending three-dots, but
4971 * the automatic sizing is supposed to give abblen that ensures
4972 * uniqueness across all objects (statistically speaking).
4974 if (abblen
< GIT_SHA1_HEXSZ
- 3) {
4975 static char hex
[GIT_MAX_HEXSZ
+ 1];
4976 if (len
< abblen
&& abblen
<= len
+ 2)
4977 xsnprintf(hex
, sizeof(hex
), "%s%.*s", abbrev
, len
+3-abblen
, "..");
4979 xsnprintf(hex
, sizeof(hex
), "%s...", abbrev
);
4983 return oid_to_hex(oid
);
4986 static void diff_flush_raw(struct diff_filepair
*p
, struct diff_options
*opt
)
4988 int line_termination
= opt
->line_termination
;
4989 int inter_name_termination
= line_termination
? '\t' : '\0';
4991 fprintf(opt
->file
, "%s", diff_line_prefix(opt
));
4992 if (!(opt
->output_format
& DIFF_FORMAT_NAME_STATUS
)) {
4993 fprintf(opt
->file
, ":%06o %06o %s ", p
->one
->mode
, p
->two
->mode
,
4994 diff_aligned_abbrev(&p
->one
->oid
, opt
->abbrev
));
4995 fprintf(opt
->file
, "%s ",
4996 diff_aligned_abbrev(&p
->two
->oid
, opt
->abbrev
));
4999 fprintf(opt
->file
, "%c%03d%c", p
->status
, similarity_index(p
),
5000 inter_name_termination
);
5002 fprintf(opt
->file
, "%c%c", p
->status
, inter_name_termination
);
5005 if (p
->status
== DIFF_STATUS_COPIED
||
5006 p
->status
== DIFF_STATUS_RENAMED
) {
5007 const char *name_a
, *name_b
;
5008 name_a
= p
->one
->path
;
5009 name_b
= p
->two
->path
;
5010 strip_prefix(opt
->prefix_length
, &name_a
, &name_b
);
5011 write_name_quoted(name_a
, opt
->file
, inter_name_termination
);
5012 write_name_quoted(name_b
, opt
->file
, line_termination
);
5014 const char *name_a
, *name_b
;
5015 name_a
= p
->one
->mode
? p
->one
->path
: p
->two
->path
;
5017 strip_prefix(opt
->prefix_length
, &name_a
, &name_b
);
5018 write_name_quoted(name_a
, opt
->file
, line_termination
);
5022 int diff_unmodified_pair(struct diff_filepair
*p
)
5024 /* This function is written stricter than necessary to support
5025 * the currently implemented transformers, but the idea is to
5026 * let transformers to produce diff_filepairs any way they want,
5027 * and filter and clean them up here before producing the output.
5029 struct diff_filespec
*one
= p
->one
, *two
= p
->two
;
5031 if (DIFF_PAIR_UNMERGED(p
))
5032 return 0; /* unmerged is interesting */
5034 /* deletion, addition, mode or type change
5035 * and rename are all interesting.
5037 if (DIFF_FILE_VALID(one
) != DIFF_FILE_VALID(two
) ||
5038 DIFF_PAIR_MODE_CHANGED(p
) ||
5039 strcmp(one
->path
, two
->path
))
5042 /* both are valid and point at the same path. that is, we are
5043 * dealing with a change.
5045 if (one
->oid_valid
&& two
->oid_valid
&&
5046 !oidcmp(&one
->oid
, &two
->oid
) &&
5047 !one
->dirty_submodule
&& !two
->dirty_submodule
)
5048 return 1; /* no change */
5049 if (!one
->oid_valid
&& !two
->oid_valid
)
5050 return 1; /* both look at the same file on the filesystem. */
5054 static void diff_flush_patch(struct diff_filepair
*p
, struct diff_options
*o
)
5056 if (diff_unmodified_pair(p
))
5059 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
5060 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
5061 return; /* no tree diffs in patch format */
5066 static void diff_flush_stat(struct diff_filepair
*p
, struct diff_options
*o
,
5067 struct diffstat_t
*diffstat
)
5069 if (diff_unmodified_pair(p
))
5072 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
5073 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
5074 return; /* no useful stat for tree diffs */
5076 run_diffstat(p
, o
, diffstat
);
5079 static void diff_flush_checkdiff(struct diff_filepair
*p
,
5080 struct diff_options
*o
)
5082 if (diff_unmodified_pair(p
))
5085 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
5086 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
5087 return; /* nothing to check in tree diffs */
5089 run_checkdiff(p
, o
);
5092 int diff_queue_is_empty(void)
5094 struct diff_queue_struct
*q
= &diff_queued_diff
;
5096 for (i
= 0; i
< q
->nr
; i
++)
5097 if (!diff_unmodified_pair(q
->queue
[i
]))
5103 void diff_debug_filespec(struct diff_filespec
*s
, int x
, const char *one
)
5105 fprintf(stderr
, "queue[%d] %s (%s) %s %06o %s\n",
5108 DIFF_FILE_VALID(s
) ? "valid" : "invalid",
5110 s
->oid_valid
? oid_to_hex(&s
->oid
) : "");
5111 fprintf(stderr
, "queue[%d] %s size %lu\n",
5116 void diff_debug_filepair(const struct diff_filepair
*p
, int i
)
5118 diff_debug_filespec(p
->one
, i
, "one");
5119 diff_debug_filespec(p
->two
, i
, "two");
5120 fprintf(stderr
, "score %d, status %c rename_used %d broken %d\n",
5121 p
->score
, p
->status
? p
->status
: '?',
5122 p
->one
->rename_used
, p
->broken_pair
);
5125 void diff_debug_queue(const char *msg
, struct diff_queue_struct
*q
)
5129 fprintf(stderr
, "%s\n", msg
);
5130 fprintf(stderr
, "q->nr = %d\n", q
->nr
);
5131 for (i
= 0; i
< q
->nr
; i
++) {
5132 struct diff_filepair
*p
= q
->queue
[i
];
5133 diff_debug_filepair(p
, i
);
5138 static void diff_resolve_rename_copy(void)
5141 struct diff_filepair
*p
;
5142 struct diff_queue_struct
*q
= &diff_queued_diff
;
5144 diff_debug_queue("resolve-rename-copy", q
);
5146 for (i
= 0; i
< q
->nr
; i
++) {
5148 p
->status
= 0; /* undecided */
5149 if (DIFF_PAIR_UNMERGED(p
))
5150 p
->status
= DIFF_STATUS_UNMERGED
;
5151 else if (!DIFF_FILE_VALID(p
->one
))
5152 p
->status
= DIFF_STATUS_ADDED
;
5153 else if (!DIFF_FILE_VALID(p
->two
))
5154 p
->status
= DIFF_STATUS_DELETED
;
5155 else if (DIFF_PAIR_TYPE_CHANGED(p
))
5156 p
->status
= DIFF_STATUS_TYPE_CHANGED
;
5158 /* from this point on, we are dealing with a pair
5159 * whose both sides are valid and of the same type, i.e.
5160 * either in-place edit or rename/copy edit.
5162 else if (DIFF_PAIR_RENAME(p
)) {
5164 * A rename might have re-connected a broken
5165 * pair up, causing the pathnames to be the
5166 * same again. If so, that's not a rename at
5167 * all, just a modification..
5169 * Otherwise, see if this source was used for
5170 * multiple renames, in which case we decrement
5171 * the count, and call it a copy.
5173 if (!strcmp(p
->one
->path
, p
->two
->path
))
5174 p
->status
= DIFF_STATUS_MODIFIED
;
5175 else if (--p
->one
->rename_used
> 0)
5176 p
->status
= DIFF_STATUS_COPIED
;
5178 p
->status
= DIFF_STATUS_RENAMED
;
5180 else if (oidcmp(&p
->one
->oid
, &p
->two
->oid
) ||
5181 p
->one
->mode
!= p
->two
->mode
||
5182 p
->one
->dirty_submodule
||
5183 p
->two
->dirty_submodule
||
5184 is_null_oid(&p
->one
->oid
))
5185 p
->status
= DIFF_STATUS_MODIFIED
;
5187 /* This is a "no-change" entry and should not
5188 * happen anymore, but prepare for broken callers.
5190 error("feeding unmodified %s to diffcore",
5192 p
->status
= DIFF_STATUS_UNKNOWN
;
5195 diff_debug_queue("resolve-rename-copy done", q
);
5198 static int check_pair_status(struct diff_filepair
*p
)
5200 switch (p
->status
) {
5201 case DIFF_STATUS_UNKNOWN
:
5204 die("internal error in diff-resolve-rename-copy");
5210 static void flush_one_pair(struct diff_filepair
*p
, struct diff_options
*opt
)
5212 int fmt
= opt
->output_format
;
5214 if (fmt
& DIFF_FORMAT_CHECKDIFF
)
5215 diff_flush_checkdiff(p
, opt
);
5216 else if (fmt
& (DIFF_FORMAT_RAW
| DIFF_FORMAT_NAME_STATUS
))
5217 diff_flush_raw(p
, opt
);
5218 else if (fmt
& DIFF_FORMAT_NAME
) {
5219 const char *name_a
, *name_b
;
5220 name_a
= p
->two
->path
;
5222 strip_prefix(opt
->prefix_length
, &name_a
, &name_b
);
5223 fprintf(opt
->file
, "%s", diff_line_prefix(opt
));
5224 write_name_quoted(name_a
, opt
->file
, opt
->line_termination
);
5228 static void show_file_mode_name(struct diff_options
*opt
, const char *newdelete
, struct diff_filespec
*fs
)
5230 struct strbuf sb
= STRBUF_INIT
;
5232 strbuf_addf(&sb
, " %s mode %06o ", newdelete
, fs
->mode
);
5234 strbuf_addf(&sb
, " %s ", newdelete
);
5236 quote_c_style(fs
->path
, &sb
, NULL
, 0);
5237 strbuf_addch(&sb
, '\n');
5238 emit_diff_symbol(opt
, DIFF_SYMBOL_SUMMARY
,
5240 strbuf_release(&sb
);
5243 static void show_mode_change(struct diff_options
*opt
, struct diff_filepair
*p
,
5246 if (p
->one
->mode
&& p
->two
->mode
&& p
->one
->mode
!= p
->two
->mode
) {
5247 struct strbuf sb
= STRBUF_INIT
;
5248 strbuf_addf(&sb
, " mode change %06o => %06o",
5249 p
->one
->mode
, p
->two
->mode
);
5251 strbuf_addch(&sb
, ' ');
5252 quote_c_style(p
->two
->path
, &sb
, NULL
, 0);
5254 strbuf_addch(&sb
, '\n');
5255 emit_diff_symbol(opt
, DIFF_SYMBOL_SUMMARY
,
5257 strbuf_release(&sb
);
5261 static void show_rename_copy(struct diff_options
*opt
, const char *renamecopy
,
5262 struct diff_filepair
*p
)
5264 struct strbuf sb
= STRBUF_INIT
;
5265 char *names
= pprint_rename(p
->one
->path
, p
->two
->path
);
5266 strbuf_addf(&sb
, " %s %s (%d%%)\n",
5267 renamecopy
, names
, similarity_index(p
));
5269 emit_diff_symbol(opt
, DIFF_SYMBOL_SUMMARY
,
5271 show_mode_change(opt
, p
, 0);
5274 static void diff_summary(struct diff_options
*opt
, struct diff_filepair
*p
)
5277 case DIFF_STATUS_DELETED
:
5278 show_file_mode_name(opt
, "delete", p
->one
);
5280 case DIFF_STATUS_ADDED
:
5281 show_file_mode_name(opt
, "create", p
->two
);
5283 case DIFF_STATUS_COPIED
:
5284 show_rename_copy(opt
, "copy", p
);
5286 case DIFF_STATUS_RENAMED
:
5287 show_rename_copy(opt
, "rename", p
);
5291 struct strbuf sb
= STRBUF_INIT
;
5292 strbuf_addstr(&sb
, " rewrite ");
5293 quote_c_style(p
->two
->path
, &sb
, NULL
, 0);
5294 strbuf_addf(&sb
, " (%d%%)\n", similarity_index(p
));
5295 emit_diff_symbol(opt
, DIFF_SYMBOL_SUMMARY
,
5298 show_mode_change(opt
, p
, !p
->score
);
5308 static int remove_space(char *line
, int len
)
5314 for (i
= 0; i
< len
; i
++)
5315 if (!isspace((c
= line
[i
])))
5321 static void patch_id_consume(void *priv
, char *line
, unsigned long len
)
5323 struct patch_id_t
*data
= priv
;
5326 /* Ignore line numbers when computing the SHA1 of the patch */
5327 if (starts_with(line
, "@@ -"))
5330 new_len
= remove_space(line
, len
);
5332 git_SHA1_Update(data
->ctx
, line
, new_len
);
5333 data
->patchlen
+= new_len
;
5336 static void patch_id_add_string(git_SHA_CTX
*ctx
, const char *str
)
5338 git_SHA1_Update(ctx
, str
, strlen(str
));
5341 static void patch_id_add_mode(git_SHA_CTX
*ctx
, unsigned mode
)
5343 /* large enough for 2^32 in octal */
5345 int len
= xsnprintf(buf
, sizeof(buf
), "%06o", mode
);
5346 git_SHA1_Update(ctx
, buf
, len
);
5349 /* returns 0 upon success, and writes result into sha1 */
5350 static int diff_get_patch_id(struct diff_options
*options
, struct object_id
*oid
, int diff_header_only
)
5352 struct diff_queue_struct
*q
= &diff_queued_diff
;
5355 struct patch_id_t data
;
5357 git_SHA1_Init(&ctx
);
5358 memset(&data
, 0, sizeof(struct patch_id_t
));
5361 for (i
= 0; i
< q
->nr
; i
++) {
5365 struct diff_filepair
*p
= q
->queue
[i
];
5368 memset(&xpp
, 0, sizeof(xpp
));
5369 memset(&xecfg
, 0, sizeof(xecfg
));
5371 return error("internal diff status error");
5372 if (p
->status
== DIFF_STATUS_UNKNOWN
)
5374 if (diff_unmodified_pair(p
))
5376 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
5377 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
5379 if (DIFF_PAIR_UNMERGED(p
))
5382 diff_fill_oid_info(p
->one
);
5383 diff_fill_oid_info(p
->two
);
5385 len1
= remove_space(p
->one
->path
, strlen(p
->one
->path
));
5386 len2
= remove_space(p
->two
->path
, strlen(p
->two
->path
));
5387 patch_id_add_string(&ctx
, "diff--git");
5388 patch_id_add_string(&ctx
, "a/");
5389 git_SHA1_Update(&ctx
, p
->one
->path
, len1
);
5390 patch_id_add_string(&ctx
, "b/");
5391 git_SHA1_Update(&ctx
, p
->two
->path
, len2
);
5393 if (p
->one
->mode
== 0) {
5394 patch_id_add_string(&ctx
, "newfilemode");
5395 patch_id_add_mode(&ctx
, p
->two
->mode
);
5396 patch_id_add_string(&ctx
, "---/dev/null");
5397 patch_id_add_string(&ctx
, "+++b/");
5398 git_SHA1_Update(&ctx
, p
->two
->path
, len2
);
5399 } else if (p
->two
->mode
== 0) {
5400 patch_id_add_string(&ctx
, "deletedfilemode");
5401 patch_id_add_mode(&ctx
, p
->one
->mode
);
5402 patch_id_add_string(&ctx
, "---a/");
5403 git_SHA1_Update(&ctx
, p
->one
->path
, len1
);
5404 patch_id_add_string(&ctx
, "+++/dev/null");
5406 patch_id_add_string(&ctx
, "---a/");
5407 git_SHA1_Update(&ctx
, p
->one
->path
, len1
);
5408 patch_id_add_string(&ctx
, "+++b/");
5409 git_SHA1_Update(&ctx
, p
->two
->path
, len2
);
5412 if (diff_header_only
)
5415 if (fill_mmfile(&mf1
, p
->one
) < 0 ||
5416 fill_mmfile(&mf2
, p
->two
) < 0)
5417 return error("unable to read files to diff");
5419 if (diff_filespec_is_binary(p
->one
) ||
5420 diff_filespec_is_binary(p
->two
)) {
5421 git_SHA1_Update(&ctx
, oid_to_hex(&p
->one
->oid
),
5423 git_SHA1_Update(&ctx
, oid_to_hex(&p
->two
->oid
),
5431 if (xdi_diff_outf(&mf1
, &mf2
, patch_id_consume
, &data
,
5433 return error("unable to generate patch-id diff for %s",
5437 git_SHA1_Final(oid
->hash
, &ctx
);
5441 int diff_flush_patch_id(struct diff_options
*options
, struct object_id
*oid
, int diff_header_only
)
5443 struct diff_queue_struct
*q
= &diff_queued_diff
;
5445 int result
= diff_get_patch_id(options
, oid
, diff_header_only
);
5447 for (i
= 0; i
< q
->nr
; i
++)
5448 diff_free_filepair(q
->queue
[i
]);
5451 DIFF_QUEUE_CLEAR(q
);
5456 static int is_summary_empty(const struct diff_queue_struct
*q
)
5460 for (i
= 0; i
< q
->nr
; i
++) {
5461 const struct diff_filepair
*p
= q
->queue
[i
];
5463 switch (p
->status
) {
5464 case DIFF_STATUS_DELETED
:
5465 case DIFF_STATUS_ADDED
:
5466 case DIFF_STATUS_COPIED
:
5467 case DIFF_STATUS_RENAMED
:
5472 if (p
->one
->mode
&& p
->two
->mode
&&
5473 p
->one
->mode
!= p
->two
->mode
)
5481 static const char rename_limit_warning
[] =
5482 N_("inexact rename detection was skipped due to too many files.");
5484 static const char degrade_cc_to_c_warning
[] =
5485 N_("only found copies from modified paths due to too many files.");
5487 static const char rename_limit_advice
[] =
5488 N_("you may want to set your %s variable to at least "
5489 "%d and retry the command.");
5491 void diff_warn_rename_limit(const char *varname
, int needed
, int degraded_cc
)
5494 warning(_(degrade_cc_to_c_warning
));
5496 warning(_(rename_limit_warning
));
5499 if (0 < needed
&& needed
< 32767)
5500 warning(_(rename_limit_advice
), varname
, needed
);
5503 static void diff_flush_patch_all_file_pairs(struct diff_options
*o
)
5506 static struct emitted_diff_symbols esm
= EMITTED_DIFF_SYMBOLS_INIT
;
5507 struct diff_queue_struct
*q
= &diff_queued_diff
;
5509 if (WSEH_NEW
& WS_RULE_MASK
)
5510 die("BUG: WS rules bit mask overlaps with diff symbol flags");
5513 o
->emitted_symbols
= &esm
;
5515 for (i
= 0; i
< q
->nr
; i
++) {
5516 struct diff_filepair
*p
= q
->queue
[i
];
5517 if (check_pair_status(p
))
5518 diff_flush_patch(p
, o
);
5521 if (o
->emitted_symbols
) {
5522 if (o
->color_moved
) {
5523 struct hashmap add_lines
, del_lines
;
5525 hashmap_init(&del_lines
,
5526 (hashmap_cmp_fn
)moved_entry_cmp
, o
, 0);
5527 hashmap_init(&add_lines
,
5528 (hashmap_cmp_fn
)moved_entry_cmp
, o
, 0);
5530 add_lines_to_move_detection(o
, &add_lines
, &del_lines
);
5531 mark_color_as_moved(o
, &add_lines
, &del_lines
);
5532 if (o
->color_moved
== COLOR_MOVED_ZEBRA_DIM
)
5535 hashmap_free(&add_lines
, 0);
5536 hashmap_free(&del_lines
, 0);
5539 for (i
= 0; i
< esm
.nr
; i
++)
5540 emit_diff_symbol_from_struct(o
, &esm
.buf
[i
]);
5542 for (i
= 0; i
< esm
.nr
; i
++)
5543 free((void *)esm
.buf
[i
].line
);
5548 void diff_flush(struct diff_options
*options
)
5550 struct diff_queue_struct
*q
= &diff_queued_diff
;
5551 int i
, output_format
= options
->output_format
;
5553 int dirstat_by_line
= 0;
5556 * Order: raw, stat, summary, patch
5557 * or: name/name-status/checkdiff (other bits clear)
5562 if (output_format
& (DIFF_FORMAT_RAW
|
5564 DIFF_FORMAT_NAME_STATUS
|
5565 DIFF_FORMAT_CHECKDIFF
)) {
5566 for (i
= 0; i
< q
->nr
; i
++) {
5567 struct diff_filepair
*p
= q
->queue
[i
];
5568 if (check_pair_status(p
))
5569 flush_one_pair(p
, options
);
5574 if (output_format
& DIFF_FORMAT_DIRSTAT
&& DIFF_OPT_TST(options
, DIRSTAT_BY_LINE
))
5575 dirstat_by_line
= 1;
5577 if (output_format
& (DIFF_FORMAT_DIFFSTAT
|DIFF_FORMAT_SHORTSTAT
|DIFF_FORMAT_NUMSTAT
) ||
5579 struct diffstat_t diffstat
;
5581 memset(&diffstat
, 0, sizeof(struct diffstat_t
));
5582 for (i
= 0; i
< q
->nr
; i
++) {
5583 struct diff_filepair
*p
= q
->queue
[i
];
5584 if (check_pair_status(p
))
5585 diff_flush_stat(p
, options
, &diffstat
);
5587 if (output_format
& DIFF_FORMAT_NUMSTAT
)
5588 show_numstat(&diffstat
, options
);
5589 if (output_format
& DIFF_FORMAT_DIFFSTAT
)
5590 show_stats(&diffstat
, options
);
5591 if (output_format
& DIFF_FORMAT_SHORTSTAT
)
5592 show_shortstats(&diffstat
, options
);
5593 if (output_format
& DIFF_FORMAT_DIRSTAT
&& dirstat_by_line
)
5594 show_dirstat_by_line(&diffstat
, options
);
5595 free_diffstat_info(&diffstat
);
5598 if ((output_format
& DIFF_FORMAT_DIRSTAT
) && !dirstat_by_line
)
5599 show_dirstat(options
);
5601 if (output_format
& DIFF_FORMAT_SUMMARY
&& !is_summary_empty(q
)) {
5602 for (i
= 0; i
< q
->nr
; i
++) {
5603 diff_summary(options
, q
->queue
[i
]);
5608 if (output_format
& DIFF_FORMAT_NO_OUTPUT
&&
5609 DIFF_OPT_TST(options
, EXIT_WITH_STATUS
) &&
5610 DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
)) {
5612 * run diff_flush_patch for the exit status. setting
5613 * options->file to /dev/null should be safe, because we
5614 * aren't supposed to produce any output anyway.
5616 if (options
->close_file
)
5617 fclose(options
->file
);
5618 options
->file
= xfopen("/dev/null", "w");
5619 options
->close_file
= 1;
5620 options
->color_moved
= 0;
5621 for (i
= 0; i
< q
->nr
; i
++) {
5622 struct diff_filepair
*p
= q
->queue
[i
];
5623 if (check_pair_status(p
))
5624 diff_flush_patch(p
, options
);
5625 if (options
->found_changes
)
5630 if (output_format
& DIFF_FORMAT_PATCH
) {
5632 emit_diff_symbol(options
, DIFF_SYMBOL_SEPARATOR
, NULL
, 0, 0);
5633 if (options
->stat_sep
)
5634 /* attach patch instead of inline */
5635 emit_diff_symbol(options
, DIFF_SYMBOL_STAT_SEP
,
5639 diff_flush_patch_all_file_pairs(options
);
5642 if (output_format
& DIFF_FORMAT_CALLBACK
)
5643 options
->format_callback(q
, options
, options
->format_callback_data
);
5645 for (i
= 0; i
< q
->nr
; i
++)
5646 diff_free_filepair(q
->queue
[i
]);
5649 DIFF_QUEUE_CLEAR(q
);
5650 if (options
->close_file
)
5651 fclose(options
->file
);
5654 * Report the content-level differences with HAS_CHANGES;
5655 * diff_addremove/diff_change does not set the bit when
5656 * DIFF_FROM_CONTENTS is in effect (e.g. with -w).
5658 if (DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
)) {
5659 if (options
->found_changes
)
5660 DIFF_OPT_SET(options
, HAS_CHANGES
);
5662 DIFF_OPT_CLR(options
, HAS_CHANGES
);
5666 static int match_filter(const struct diff_options
*options
, const struct diff_filepair
*p
)
5668 return (((p
->status
== DIFF_STATUS_MODIFIED
) &&
5670 filter_bit_tst(DIFF_STATUS_FILTER_BROKEN
, options
)) ||
5672 filter_bit_tst(DIFF_STATUS_MODIFIED
, options
)))) ||
5673 ((p
->status
!= DIFF_STATUS_MODIFIED
) &&
5674 filter_bit_tst(p
->status
, options
)));
5677 static void diffcore_apply_filter(struct diff_options
*options
)
5680 struct diff_queue_struct
*q
= &diff_queued_diff
;
5681 struct diff_queue_struct outq
;
5683 DIFF_QUEUE_CLEAR(&outq
);
5685 if (!options
->filter
)
5688 if (filter_bit_tst(DIFF_STATUS_FILTER_AON
, options
)) {
5690 for (i
= found
= 0; !found
&& i
< q
->nr
; i
++) {
5691 if (match_filter(options
, q
->queue
[i
]))
5697 /* otherwise we will clear the whole queue
5698 * by copying the empty outq at the end of this
5699 * function, but first clear the current entries
5702 for (i
= 0; i
< q
->nr
; i
++)
5703 diff_free_filepair(q
->queue
[i
]);
5706 /* Only the matching ones */
5707 for (i
= 0; i
< q
->nr
; i
++) {
5708 struct diff_filepair
*p
= q
->queue
[i
];
5709 if (match_filter(options
, p
))
5712 diff_free_filepair(p
);
5719 /* Check whether two filespecs with the same mode and size are identical */
5720 static int diff_filespec_is_identical(struct diff_filespec
*one
,
5721 struct diff_filespec
*two
)
5723 if (S_ISGITLINK(one
->mode
))
5725 if (diff_populate_filespec(one
, 0))
5727 if (diff_populate_filespec(two
, 0))
5729 return !memcmp(one
->data
, two
->data
, one
->size
);
5732 static int diff_filespec_check_stat_unmatch(struct diff_filepair
*p
)
5734 if (p
->done_skip_stat_unmatch
)
5735 return p
->skip_stat_unmatch_result
;
5737 p
->done_skip_stat_unmatch
= 1;
5738 p
->skip_stat_unmatch_result
= 0;
5740 * 1. Entries that come from stat info dirtiness
5741 * always have both sides (iow, not create/delete),
5742 * one side of the object name is unknown, with
5743 * the same mode and size. Keep the ones that
5744 * do not match these criteria. They have real
5747 * 2. At this point, the file is known to be modified,
5748 * with the same mode and size, and the object
5749 * name of one side is unknown. Need to inspect
5750 * the identical contents.
5752 if (!DIFF_FILE_VALID(p
->one
) || /* (1) */
5753 !DIFF_FILE_VALID(p
->two
) ||
5754 (p
->one
->oid_valid
&& p
->two
->oid_valid
) ||
5755 (p
->one
->mode
!= p
->two
->mode
) ||
5756 diff_populate_filespec(p
->one
, CHECK_SIZE_ONLY
) ||
5757 diff_populate_filespec(p
->two
, CHECK_SIZE_ONLY
) ||
5758 (p
->one
->size
!= p
->two
->size
) ||
5759 !diff_filespec_is_identical(p
->one
, p
->two
)) /* (2) */
5760 p
->skip_stat_unmatch_result
= 1;
5761 return p
->skip_stat_unmatch_result
;
5764 static void diffcore_skip_stat_unmatch(struct diff_options
*diffopt
)
5767 struct diff_queue_struct
*q
= &diff_queued_diff
;
5768 struct diff_queue_struct outq
;
5769 DIFF_QUEUE_CLEAR(&outq
);
5771 for (i
= 0; i
< q
->nr
; i
++) {
5772 struct diff_filepair
*p
= q
->queue
[i
];
5774 if (diff_filespec_check_stat_unmatch(p
))
5778 * The caller can subtract 1 from skip_stat_unmatch
5779 * to determine how many paths were dirty only
5780 * due to stat info mismatch.
5782 if (!DIFF_OPT_TST(diffopt
, NO_INDEX
))
5783 diffopt
->skip_stat_unmatch
++;
5784 diff_free_filepair(p
);
5791 static int diffnamecmp(const void *a_
, const void *b_
)
5793 const struct diff_filepair
*a
= *((const struct diff_filepair
**)a_
);
5794 const struct diff_filepair
*b
= *((const struct diff_filepair
**)b_
);
5795 const char *name_a
, *name_b
;
5797 name_a
= a
->one
? a
->one
->path
: a
->two
->path
;
5798 name_b
= b
->one
? b
->one
->path
: b
->two
->path
;
5799 return strcmp(name_a
, name_b
);
5802 void diffcore_fix_diff_index(struct diff_options
*options
)
5804 struct diff_queue_struct
*q
= &diff_queued_diff
;
5805 QSORT(q
->queue
, q
->nr
, diffnamecmp
);
5808 void diffcore_std(struct diff_options
*options
)
5810 /* NOTE please keep the following in sync with diff_tree_combined() */
5811 if (options
->skip_stat_unmatch
)
5812 diffcore_skip_stat_unmatch(options
);
5813 if (!options
->found_follow
) {
5814 /* See try_to_follow_renames() in tree-diff.c */
5815 if (options
->break_opt
!= -1)
5816 diffcore_break(options
->break_opt
);
5817 if (options
->detect_rename
)
5818 diffcore_rename(options
);
5819 if (options
->break_opt
!= -1)
5820 diffcore_merge_broken();
5822 if (options
->pickaxe
)
5823 diffcore_pickaxe(options
);
5824 if (options
->orderfile
)
5825 diffcore_order(options
->orderfile
);
5826 if (!options
->found_follow
)
5827 /* See try_to_follow_renames() in tree-diff.c */
5828 diff_resolve_rename_copy();
5829 diffcore_apply_filter(options
);
5831 if (diff_queued_diff
.nr
&& !DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
))
5832 DIFF_OPT_SET(options
, HAS_CHANGES
);
5834 DIFF_OPT_CLR(options
, HAS_CHANGES
);
5836 options
->found_follow
= 0;
5839 int diff_result_code(struct diff_options
*opt
, int status
)
5843 diff_warn_rename_limit("diff.renameLimit",
5844 opt
->needed_rename_limit
,
5845 opt
->degraded_cc_to_c
);
5846 if (!DIFF_OPT_TST(opt
, EXIT_WITH_STATUS
) &&
5847 !(opt
->output_format
& DIFF_FORMAT_CHECKDIFF
))
5849 if (DIFF_OPT_TST(opt
, EXIT_WITH_STATUS
) &&
5850 DIFF_OPT_TST(opt
, HAS_CHANGES
))
5852 if ((opt
->output_format
& DIFF_FORMAT_CHECKDIFF
) &&
5853 DIFF_OPT_TST(opt
, CHECK_FAILED
))
5858 int diff_can_quit_early(struct diff_options
*opt
)
5860 return (DIFF_OPT_TST(opt
, QUICK
) &&
5862 DIFF_OPT_TST(opt
, HAS_CHANGES
));
5866 * Shall changes to this submodule be ignored?
5868 * Submodule changes can be configured to be ignored separately for each path,
5869 * but that configuration can be overridden from the command line.
5871 static int is_submodule_ignored(const char *path
, struct diff_options
*options
)
5874 unsigned orig_flags
= options
->flags
;
5875 if (!DIFF_OPT_TST(options
, OVERRIDE_SUBMODULE_CONFIG
))
5876 set_diffopt_flags_from_submodule_config(options
, path
);
5877 if (DIFF_OPT_TST(options
, IGNORE_SUBMODULES
))
5879 options
->flags
= orig_flags
;
5883 void diff_addremove(struct diff_options
*options
,
5884 int addremove
, unsigned mode
,
5885 const struct object_id
*oid
,
5887 const char *concatpath
, unsigned dirty_submodule
)
5889 struct diff_filespec
*one
, *two
;
5891 if (S_ISGITLINK(mode
) && is_submodule_ignored(concatpath
, options
))
5894 /* This may look odd, but it is a preparation for
5895 * feeding "there are unchanged files which should
5896 * not produce diffs, but when you are doing copy
5897 * detection you would need them, so here they are"
5898 * entries to the diff-core. They will be prefixed
5899 * with something like '=' or '*' (I haven't decided
5900 * which but should not make any difference).
5901 * Feeding the same new and old to diff_change()
5902 * also has the same effect.
5903 * Before the final output happens, they are pruned after
5904 * merged into rename/copy pairs as appropriate.
5906 if (DIFF_OPT_TST(options
, REVERSE_DIFF
))
5907 addremove
= (addremove
== '+' ? '-' :
5908 addremove
== '-' ? '+' : addremove
);
5910 if (options
->prefix
&&
5911 strncmp(concatpath
, options
->prefix
, options
->prefix_length
))
5914 one
= alloc_filespec(concatpath
);
5915 two
= alloc_filespec(concatpath
);
5917 if (addremove
!= '+')
5918 fill_filespec(one
, oid
, oid_valid
, mode
);
5919 if (addremove
!= '-') {
5920 fill_filespec(two
, oid
, oid_valid
, mode
);
5921 two
->dirty_submodule
= dirty_submodule
;
5924 diff_queue(&diff_queued_diff
, one
, two
);
5925 if (!DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
))
5926 DIFF_OPT_SET(options
, HAS_CHANGES
);
5929 void diff_change(struct diff_options
*options
,
5930 unsigned old_mode
, unsigned new_mode
,
5931 const struct object_id
*old_oid
,
5932 const struct object_id
*new_oid
,
5933 int old_oid_valid
, int new_oid_valid
,
5934 const char *concatpath
,
5935 unsigned old_dirty_submodule
, unsigned new_dirty_submodule
)
5937 struct diff_filespec
*one
, *two
;
5938 struct diff_filepair
*p
;
5940 if (S_ISGITLINK(old_mode
) && S_ISGITLINK(new_mode
) &&
5941 is_submodule_ignored(concatpath
, options
))
5944 if (DIFF_OPT_TST(options
, REVERSE_DIFF
)) {
5945 SWAP(old_mode
, new_mode
);
5946 SWAP(old_oid
, new_oid
);
5947 SWAP(old_oid_valid
, new_oid_valid
);
5948 SWAP(old_dirty_submodule
, new_dirty_submodule
);
5951 if (options
->prefix
&&
5952 strncmp(concatpath
, options
->prefix
, options
->prefix_length
))
5955 one
= alloc_filespec(concatpath
);
5956 two
= alloc_filespec(concatpath
);
5957 fill_filespec(one
, old_oid
, old_oid_valid
, old_mode
);
5958 fill_filespec(two
, new_oid
, new_oid_valid
, new_mode
);
5959 one
->dirty_submodule
= old_dirty_submodule
;
5960 two
->dirty_submodule
= new_dirty_submodule
;
5961 p
= diff_queue(&diff_queued_diff
, one
, two
);
5963 if (DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
))
5966 if (DIFF_OPT_TST(options
, QUICK
) && options
->skip_stat_unmatch
&&
5967 !diff_filespec_check_stat_unmatch(p
))
5970 DIFF_OPT_SET(options
, HAS_CHANGES
);
5973 struct diff_filepair
*diff_unmerge(struct diff_options
*options
, const char *path
)
5975 struct diff_filepair
*pair
;
5976 struct diff_filespec
*one
, *two
;
5978 if (options
->prefix
&&
5979 strncmp(path
, options
->prefix
, options
->prefix_length
))
5982 one
= alloc_filespec(path
);
5983 two
= alloc_filespec(path
);
5984 pair
= diff_queue(&diff_queued_diff
, one
, two
);
5985 pair
->is_unmerged
= 1;
5989 static char *run_textconv(const char *pgm
, struct diff_filespec
*spec
,
5992 struct diff_tempfile
*temp
;
5993 const char *argv
[3];
5994 const char **arg
= argv
;
5995 struct child_process child
= CHILD_PROCESS_INIT
;
5996 struct strbuf buf
= STRBUF_INIT
;
5999 temp
= prepare_temp_file(spec
->path
, spec
);
6001 *arg
++ = temp
->name
;
6004 child
.use_shell
= 1;
6007 if (start_command(&child
)) {
6012 if (strbuf_read(&buf
, child
.out
, 0) < 0)
6013 err
= error("error reading from textconv command '%s'", pgm
);
6016 if (finish_command(&child
) || err
) {
6017 strbuf_release(&buf
);
6023 return strbuf_detach(&buf
, outsize
);
6026 size_t fill_textconv(struct userdiff_driver
*driver
,
6027 struct diff_filespec
*df
,
6033 if (!DIFF_FILE_VALID(df
)) {
6037 if (diff_populate_filespec(df
, 0))
6038 die("unable to read files to diff");
6043 if (!driver
->textconv
)
6044 die("BUG: fill_textconv called with non-textconv driver");
6046 if (driver
->textconv_cache
&& df
->oid_valid
) {
6047 *outbuf
= notes_cache_get(driver
->textconv_cache
,
6054 *outbuf
= run_textconv(driver
->textconv
, df
, &size
);
6056 die("unable to read files to diff");
6058 if (driver
->textconv_cache
&& df
->oid_valid
) {
6059 /* ignore errors, as we might be in a readonly repository */
6060 notes_cache_put(driver
->textconv_cache
, &df
->oid
, *outbuf
,
6063 * we could save up changes and flush them all at the end,
6064 * but we would need an extra call after all diffing is done.
6065 * Since generating a cache entry is the slow path anyway,
6066 * this extra overhead probably isn't a big deal.
6068 notes_cache_write(driver
->textconv_cache
);
6074 int textconv_object(const char *path
,
6076 const struct object_id
*oid
,
6079 unsigned long *buf_size
)
6081 struct diff_filespec
*df
;
6082 struct userdiff_driver
*textconv
;
6084 df
= alloc_filespec(path
);
6085 fill_filespec(df
, oid
, oid_valid
, mode
);
6086 textconv
= get_textconv(df
);
6092 *buf_size
= fill_textconv(textconv
, df
, buf
);
6097 void setup_diff_pager(struct diff_options
*opt
)
6100 * If the user asked for our exit code, then either they want --quiet
6101 * or --exit-code. We should definitely not bother with a pager in the
6102 * former case, as we will generate no output. Since we still properly
6103 * report our exit code even when a pager is run, we _could_ run a
6104 * pager with --exit-code. But since we have not done so historically,
6105 * and because it is easy to find people oneline advising "git diff
6106 * --exit-code" in hooks and other scripts, we do not do so.
6108 if (!DIFF_OPT_TST(opt
, EXIT_WITH_STATUS
) &&
6109 check_pager_config("diff") != 0)