2 * Copyright (C) 2005 Junio C Hamano
9 #include "xdiff-interface.h"
12 #include "run-command.h"
16 #include "submodule.h"
18 #include "string-list.h"
19 #include "argv-array.h"
21 #ifdef NO_FAST_WORKING_DIRECTORY
22 #define FAST_WORKING_DIRECTORY 0
24 #define FAST_WORKING_DIRECTORY 1
27 static int diff_detect_rename_default
;
28 static int diff_compaction_heuristic
; /* experimental */
29 static int diff_rename_limit_default
= 400;
30 static int diff_suppress_blank_empty
;
31 static int diff_use_color_default
= -1;
32 static int diff_context_default
= 3;
33 static const char *diff_word_regex_cfg
;
34 static const char *external_diff_cmd_cfg
;
35 static const char *diff_order_file_cfg
;
36 int diff_auto_refresh_index
= 1;
37 static int diff_mnemonic_prefix
;
38 static int diff_no_prefix
;
39 static int diff_stat_graph_width
;
40 static int diff_dirstat_permille_default
= 30;
41 static struct diff_options default_diff_options
;
42 static long diff_algorithm
;
44 static char diff_colors
[][COLOR_MAXLEN
] = {
46 GIT_COLOR_NORMAL
, /* CONTEXT */
47 GIT_COLOR_BOLD
, /* METAINFO */
48 GIT_COLOR_CYAN
, /* FRAGINFO */
49 GIT_COLOR_RED
, /* OLD */
50 GIT_COLOR_GREEN
, /* NEW */
51 GIT_COLOR_YELLOW
, /* COMMIT */
52 GIT_COLOR_BG_RED
, /* WHITESPACE */
53 GIT_COLOR_NORMAL
, /* FUNCINFO */
56 static int parse_diff_color_slot(const char *var
)
58 if (!strcasecmp(var
, "context") || !strcasecmp(var
, "plain"))
60 if (!strcasecmp(var
, "meta"))
62 if (!strcasecmp(var
, "frag"))
64 if (!strcasecmp(var
, "old"))
66 if (!strcasecmp(var
, "new"))
68 if (!strcasecmp(var
, "commit"))
70 if (!strcasecmp(var
, "whitespace"))
71 return DIFF_WHITESPACE
;
72 if (!strcasecmp(var
, "func"))
77 static int parse_dirstat_params(struct diff_options
*options
, const char *params_string
,
78 struct strbuf
*errmsg
)
80 char *params_copy
= xstrdup(params_string
);
81 struct string_list params
= STRING_LIST_INIT_NODUP
;
86 string_list_split_in_place(¶ms
, params_copy
, ',', -1);
87 for (i
= 0; i
< params
.nr
; i
++) {
88 const char *p
= params
.items
[i
].string
;
89 if (!strcmp(p
, "changes")) {
90 DIFF_OPT_CLR(options
, DIRSTAT_BY_LINE
);
91 DIFF_OPT_CLR(options
, DIRSTAT_BY_FILE
);
92 } else if (!strcmp(p
, "lines")) {
93 DIFF_OPT_SET(options
, DIRSTAT_BY_LINE
);
94 DIFF_OPT_CLR(options
, DIRSTAT_BY_FILE
);
95 } else if (!strcmp(p
, "files")) {
96 DIFF_OPT_CLR(options
, DIRSTAT_BY_LINE
);
97 DIFF_OPT_SET(options
, DIRSTAT_BY_FILE
);
98 } else if (!strcmp(p
, "noncumulative")) {
99 DIFF_OPT_CLR(options
, DIRSTAT_CUMULATIVE
);
100 } else if (!strcmp(p
, "cumulative")) {
101 DIFF_OPT_SET(options
, DIRSTAT_CUMULATIVE
);
102 } else if (isdigit(*p
)) {
104 int permille
= strtoul(p
, &end
, 10) * 10;
105 if (*end
== '.' && isdigit(*++end
)) {
106 /* only use first digit */
107 permille
+= *end
- '0';
108 /* .. and ignore any further digits */
109 while (isdigit(*++end
))
113 options
->dirstat_permille
= permille
;
115 strbuf_addf(errmsg
, _(" Failed to parse dirstat cut-off percentage '%s'\n"),
120 strbuf_addf(errmsg
, _(" Unknown dirstat parameter '%s'\n"), p
);
125 string_list_clear(¶ms
, 0);
130 static int parse_submodule_params(struct diff_options
*options
, const char *value
)
132 if (!strcmp(value
, "log"))
133 DIFF_OPT_SET(options
, SUBMODULE_LOG
);
134 else if (!strcmp(value
, "short"))
135 DIFF_OPT_CLR(options
, SUBMODULE_LOG
);
141 static int git_config_rename(const char *var
, const char *value
)
144 return DIFF_DETECT_RENAME
;
145 if (!strcasecmp(value
, "copies") || !strcasecmp(value
, "copy"))
146 return DIFF_DETECT_COPY
;
147 return git_config_bool(var
,value
) ? DIFF_DETECT_RENAME
: 0;
150 long parse_algorithm_value(const char *value
)
154 else if (!strcasecmp(value
, "myers") || !strcasecmp(value
, "default"))
156 else if (!strcasecmp(value
, "minimal"))
157 return XDF_NEED_MINIMAL
;
158 else if (!strcasecmp(value
, "patience"))
159 return XDF_PATIENCE_DIFF
;
160 else if (!strcasecmp(value
, "histogram"))
161 return XDF_HISTOGRAM_DIFF
;
166 * These are to give UI layer defaults.
167 * The core-level commands such as git-diff-files should
168 * never be affected by the setting of diff.renames
169 * the user happens to have in the configuration file.
171 int git_diff_ui_config(const char *var
, const char *value
, void *cb
)
173 if (!strcmp(var
, "diff.color") || !strcmp(var
, "color.diff")) {
174 diff_use_color_default
= git_config_colorbool(var
, value
);
177 if (!strcmp(var
, "diff.context")) {
178 diff_context_default
= git_config_int(var
, value
);
179 if (diff_context_default
< 0)
183 if (!strcmp(var
, "diff.renames")) {
184 diff_detect_rename_default
= git_config_rename(var
, value
);
187 if (!strcmp(var
, "diff.compactionheuristic")) {
188 diff_compaction_heuristic
= git_config_bool(var
, value
);
191 if (!strcmp(var
, "diff.autorefreshindex")) {
192 diff_auto_refresh_index
= git_config_bool(var
, value
);
195 if (!strcmp(var
, "diff.mnemonicprefix")) {
196 diff_mnemonic_prefix
= git_config_bool(var
, value
);
199 if (!strcmp(var
, "diff.noprefix")) {
200 diff_no_prefix
= git_config_bool(var
, value
);
203 if (!strcmp(var
, "diff.statgraphwidth")) {
204 diff_stat_graph_width
= git_config_int(var
, value
);
207 if (!strcmp(var
, "diff.external"))
208 return git_config_string(&external_diff_cmd_cfg
, var
, value
);
209 if (!strcmp(var
, "diff.wordregex"))
210 return git_config_string(&diff_word_regex_cfg
, var
, value
);
211 if (!strcmp(var
, "diff.orderfile"))
212 return git_config_pathname(&diff_order_file_cfg
, var
, value
);
214 if (!strcmp(var
, "diff.ignoresubmodules"))
215 handle_ignore_submodules_arg(&default_diff_options
, value
);
217 if (!strcmp(var
, "diff.submodule")) {
218 if (parse_submodule_params(&default_diff_options
, value
))
219 warning(_("Unknown value for 'diff.submodule' config variable: '%s'"),
224 if (!strcmp(var
, "diff.algorithm")) {
225 diff_algorithm
= parse_algorithm_value(value
);
226 if (diff_algorithm
< 0)
231 if (git_color_config(var
, value
, cb
) < 0)
234 return git_diff_basic_config(var
, value
, cb
);
237 int git_diff_basic_config(const char *var
, const char *value
, void *cb
)
241 if (!strcmp(var
, "diff.renamelimit")) {
242 diff_rename_limit_default
= git_config_int(var
, value
);
246 if (userdiff_config(var
, value
) < 0)
249 if (skip_prefix(var
, "diff.color.", &name
) ||
250 skip_prefix(var
, "color.diff.", &name
)) {
251 int slot
= parse_diff_color_slot(name
);
255 return config_error_nonbool(var
);
256 return color_parse(value
, diff_colors
[slot
]);
259 /* like GNU diff's --suppress-blank-empty option */
260 if (!strcmp(var
, "diff.suppressblankempty") ||
261 /* for backwards compatibility */
262 !strcmp(var
, "diff.suppress-blank-empty")) {
263 diff_suppress_blank_empty
= git_config_bool(var
, value
);
267 if (!strcmp(var
, "diff.dirstat")) {
268 struct strbuf errmsg
= STRBUF_INIT
;
269 default_diff_options
.dirstat_permille
= diff_dirstat_permille_default
;
270 if (parse_dirstat_params(&default_diff_options
, value
, &errmsg
))
271 warning(_("Found errors in 'diff.dirstat' config variable:\n%s"),
273 strbuf_release(&errmsg
);
274 diff_dirstat_permille_default
= default_diff_options
.dirstat_permille
;
278 if (starts_with(var
, "submodule."))
279 return parse_submodule_config_option(var
, value
);
281 return git_default_config(var
, value
, cb
);
284 static char *quote_two(const char *one
, const char *two
)
286 int need_one
= quote_c_style(one
, NULL
, NULL
, 1);
287 int need_two
= quote_c_style(two
, NULL
, NULL
, 1);
288 struct strbuf res
= STRBUF_INIT
;
290 if (need_one
+ need_two
) {
291 strbuf_addch(&res
, '"');
292 quote_c_style(one
, &res
, NULL
, 1);
293 quote_c_style(two
, &res
, NULL
, 1);
294 strbuf_addch(&res
, '"');
296 strbuf_addstr(&res
, one
);
297 strbuf_addstr(&res
, two
);
299 return strbuf_detach(&res
, NULL
);
302 static const char *external_diff(void)
304 static const char *external_diff_cmd
= NULL
;
305 static int done_preparing
= 0;
308 return external_diff_cmd
;
309 external_diff_cmd
= getenv("GIT_EXTERNAL_DIFF");
310 if (!external_diff_cmd
)
311 external_diff_cmd
= external_diff_cmd_cfg
;
313 return external_diff_cmd
;
316 static struct diff_tempfile
{
317 const char *name
; /* filename external diff should read from */
320 char tmp_path
[PATH_MAX
];
323 typedef unsigned long (*sane_truncate_fn
)(char *line
, unsigned long len
);
325 struct emit_callback
{
328 int blank_at_eof_in_preimage
;
329 int blank_at_eof_in_postimage
;
331 int lno_in_postimage
;
332 sane_truncate_fn truncate
;
333 const char **label_path
;
334 struct diff_words_data
*diff_words
;
335 struct diff_options
*opt
;
337 struct strbuf
*header
;
340 static int count_lines(const char *data
, int size
)
342 int count
, ch
, completely_empty
= 1, nl_just_seen
= 0;
349 completely_empty
= 0;
353 completely_empty
= 0;
356 if (completely_empty
)
359 count
++; /* no trailing newline */
363 static int fill_mmfile(mmfile_t
*mf
, struct diff_filespec
*one
)
365 if (!DIFF_FILE_VALID(one
)) {
366 mf
->ptr
= (char *)""; /* does not matter */
370 else if (diff_populate_filespec(one
, 0))
374 mf
->size
= one
->size
;
378 /* like fill_mmfile, but only for size, so we can avoid retrieving blob */
379 static unsigned long diff_filespec_size(struct diff_filespec
*one
)
381 if (!DIFF_FILE_VALID(one
))
383 diff_populate_filespec(one
, CHECK_SIZE_ONLY
);
387 static int count_trailing_blank(mmfile_t
*mf
, unsigned ws_rule
)
390 long size
= mf
->size
;
395 ptr
+= size
- 1; /* pointing at the very end */
397 ; /* incomplete line */
399 ptr
--; /* skip the last LF */
400 while (mf
->ptr
< ptr
) {
402 for (prev_eol
= ptr
; mf
->ptr
<= prev_eol
; prev_eol
--)
403 if (*prev_eol
== '\n')
405 if (!ws_blank_line(prev_eol
+ 1, ptr
- prev_eol
, ws_rule
))
413 static void check_blank_at_eof(mmfile_t
*mf1
, mmfile_t
*mf2
,
414 struct emit_callback
*ecbdata
)
417 unsigned ws_rule
= ecbdata
->ws_rule
;
418 l1
= count_trailing_blank(mf1
, ws_rule
);
419 l2
= count_trailing_blank(mf2
, ws_rule
);
421 ecbdata
->blank_at_eof_in_preimage
= 0;
422 ecbdata
->blank_at_eof_in_postimage
= 0;
425 at
= count_lines(mf1
->ptr
, mf1
->size
);
426 ecbdata
->blank_at_eof_in_preimage
= (at
- l1
) + 1;
428 at
= count_lines(mf2
->ptr
, mf2
->size
);
429 ecbdata
->blank_at_eof_in_postimage
= (at
- l2
) + 1;
432 static void emit_line_0(struct diff_options
*o
, const char *set
, const char *reset
,
433 int first
, const char *line
, int len
)
435 int has_trailing_newline
, has_trailing_carriage_return
;
437 FILE *file
= o
->file
;
439 fputs(diff_line_prefix(o
), file
);
442 has_trailing_newline
= (first
== '\n');
443 has_trailing_carriage_return
= (!has_trailing_newline
&&
445 nofirst
= has_trailing_newline
|| has_trailing_carriage_return
;
447 has_trailing_newline
= (len
> 0 && line
[len
-1] == '\n');
448 if (has_trailing_newline
)
450 has_trailing_carriage_return
= (len
> 0 && line
[len
-1] == '\r');
451 if (has_trailing_carriage_return
)
456 if (len
|| !nofirst
) {
460 fwrite(line
, len
, 1, file
);
463 if (has_trailing_carriage_return
)
465 if (has_trailing_newline
)
469 static void emit_line(struct diff_options
*o
, const char *set
, const char *reset
,
470 const char *line
, int len
)
472 emit_line_0(o
, set
, reset
, line
[0], line
+1, len
-1);
475 static int new_blank_line_at_eof(struct emit_callback
*ecbdata
, const char *line
, int len
)
477 if (!((ecbdata
->ws_rule
& WS_BLANK_AT_EOF
) &&
478 ecbdata
->blank_at_eof_in_preimage
&&
479 ecbdata
->blank_at_eof_in_postimage
&&
480 ecbdata
->blank_at_eof_in_preimage
<= ecbdata
->lno_in_preimage
&&
481 ecbdata
->blank_at_eof_in_postimage
<= ecbdata
->lno_in_postimage
))
483 return ws_blank_line(line
, len
, ecbdata
->ws_rule
);
486 static void emit_add_line(const char *reset
,
487 struct emit_callback
*ecbdata
,
488 const char *line
, int len
)
490 const char *ws
= diff_get_color(ecbdata
->color_diff
, DIFF_WHITESPACE
);
491 const char *set
= diff_get_color(ecbdata
->color_diff
, DIFF_FILE_NEW
);
494 emit_line_0(ecbdata
->opt
, set
, reset
, '+', line
, len
);
495 else if (new_blank_line_at_eof(ecbdata
, line
, len
))
496 /* Blank line at EOF - paint '+' as well */
497 emit_line_0(ecbdata
->opt
, ws
, reset
, '+', line
, len
);
499 /* Emit just the prefix, then the rest. */
500 emit_line_0(ecbdata
->opt
, set
, reset
, '+', "", 0);
501 ws_check_emit(line
, len
, ecbdata
->ws_rule
,
502 ecbdata
->opt
->file
, set
, reset
, ws
);
506 static void emit_hunk_header(struct emit_callback
*ecbdata
,
507 const char *line
, int len
)
509 const char *context
= diff_get_color(ecbdata
->color_diff
, DIFF_CONTEXT
);
510 const char *frag
= diff_get_color(ecbdata
->color_diff
, DIFF_FRAGINFO
);
511 const char *func
= diff_get_color(ecbdata
->color_diff
, DIFF_FUNCINFO
);
512 const char *reset
= diff_get_color(ecbdata
->color_diff
, DIFF_RESET
);
513 static const char atat
[2] = { '@', '@' };
515 struct strbuf msgbuf
= STRBUF_INIT
;
520 * As a hunk header must begin with "@@ -<old>, +<new> @@",
521 * it always is at least 10 bytes long.
524 memcmp(line
, atat
, 2) ||
525 !(ep
= memmem(line
+ 2, len
- 2, atat
, 2))) {
526 emit_line(ecbdata
->opt
, context
, reset
, line
, len
);
529 ep
+= 2; /* skip over @@ */
531 /* The hunk header in fraginfo color */
532 strbuf_addstr(&msgbuf
, frag
);
533 strbuf_add(&msgbuf
, line
, ep
- line
);
534 strbuf_addstr(&msgbuf
, reset
);
540 if (line
[len
- i
] == '\r' || line
[len
- i
] == '\n')
543 /* blank before the func header */
544 for (cp
= ep
; ep
- line
< len
; ep
++)
545 if (*ep
!= ' ' && *ep
!= '\t')
548 strbuf_addstr(&msgbuf
, context
);
549 strbuf_add(&msgbuf
, cp
, ep
- cp
);
550 strbuf_addstr(&msgbuf
, reset
);
553 if (ep
< line
+ len
) {
554 strbuf_addstr(&msgbuf
, func
);
555 strbuf_add(&msgbuf
, ep
, line
+ len
- ep
);
556 strbuf_addstr(&msgbuf
, reset
);
559 strbuf_add(&msgbuf
, line
+ len
, org_len
- len
);
560 emit_line(ecbdata
->opt
, "", "", msgbuf
.buf
, msgbuf
.len
);
561 strbuf_release(&msgbuf
);
564 static struct diff_tempfile
*claim_diff_tempfile(void) {
566 for (i
= 0; i
< ARRAY_SIZE(diff_temp
); i
++)
567 if (!diff_temp
[i
].name
)
568 return diff_temp
+ i
;
569 die("BUG: diff is failing to clean up its tempfiles");
572 static int remove_tempfile_installed
;
574 static void remove_tempfile(void)
577 for (i
= 0; i
< ARRAY_SIZE(diff_temp
); i
++) {
578 if (diff_temp
[i
].name
== diff_temp
[i
].tmp_path
)
579 unlink_or_warn(diff_temp
[i
].name
);
580 diff_temp
[i
].name
= NULL
;
584 static void remove_tempfile_on_signal(int signo
)
591 static void print_line_count(FILE *file
, int count
)
595 fprintf(file
, "0,0");
601 fprintf(file
, "1,%d", count
);
606 static void emit_rewrite_lines(struct emit_callback
*ecb
,
607 int prefix
, const char *data
, int size
)
609 const char *endp
= NULL
;
610 static const char *nneof
= " No newline at end of file\n";
611 const char *old
= diff_get_color(ecb
->color_diff
, DIFF_FILE_OLD
);
612 const char *reset
= diff_get_color(ecb
->color_diff
, DIFF_RESET
);
617 endp
= memchr(data
, '\n', size
);
618 len
= endp
? (endp
- data
+ 1) : size
;
620 ecb
->lno_in_preimage
++;
621 emit_line_0(ecb
->opt
, old
, reset
, '-',
624 ecb
->lno_in_postimage
++;
625 emit_add_line(reset
, ecb
, data
, len
);
631 const char *context
= diff_get_color(ecb
->color_diff
,
633 putc('\n', ecb
->opt
->file
);
634 emit_line_0(ecb
->opt
, context
, reset
, '\\',
635 nneof
, strlen(nneof
));
639 static void emit_rewrite_diff(const char *name_a
,
641 struct diff_filespec
*one
,
642 struct diff_filespec
*two
,
643 struct userdiff_driver
*textconv_one
,
644 struct userdiff_driver
*textconv_two
,
645 struct diff_options
*o
)
648 const char *name_a_tab
, *name_b_tab
;
649 const char *metainfo
= diff_get_color(o
->use_color
, DIFF_METAINFO
);
650 const char *fraginfo
= diff_get_color(o
->use_color
, DIFF_FRAGINFO
);
651 const char *reset
= diff_get_color(o
->use_color
, DIFF_RESET
);
652 static struct strbuf a_name
= STRBUF_INIT
, b_name
= STRBUF_INIT
;
653 const char *a_prefix
, *b_prefix
;
654 char *data_one
, *data_two
;
655 size_t size_one
, size_two
;
656 struct emit_callback ecbdata
;
657 const char *line_prefix
= diff_line_prefix(o
);
659 if (diff_mnemonic_prefix
&& DIFF_OPT_TST(o
, REVERSE_DIFF
)) {
660 a_prefix
= o
->b_prefix
;
661 b_prefix
= o
->a_prefix
;
663 a_prefix
= o
->a_prefix
;
664 b_prefix
= o
->b_prefix
;
667 name_a
+= (*name_a
== '/');
668 name_b
+= (*name_b
== '/');
669 name_a_tab
= strchr(name_a
, ' ') ? "\t" : "";
670 name_b_tab
= strchr(name_b
, ' ') ? "\t" : "";
672 strbuf_reset(&a_name
);
673 strbuf_reset(&b_name
);
674 quote_two_c_style(&a_name
, a_prefix
, name_a
, 0);
675 quote_two_c_style(&b_name
, b_prefix
, name_b
, 0);
677 size_one
= fill_textconv(textconv_one
, one
, &data_one
);
678 size_two
= fill_textconv(textconv_two
, two
, &data_two
);
680 memset(&ecbdata
, 0, sizeof(ecbdata
));
681 ecbdata
.color_diff
= want_color(o
->use_color
);
682 ecbdata
.found_changesp
= &o
->found_changes
;
683 ecbdata
.ws_rule
= whitespace_rule(name_b
);
685 if (ecbdata
.ws_rule
& WS_BLANK_AT_EOF
) {
687 mf1
.ptr
= (char *)data_one
;
688 mf2
.ptr
= (char *)data_two
;
691 check_blank_at_eof(&mf1
, &mf2
, &ecbdata
);
693 ecbdata
.lno_in_preimage
= 1;
694 ecbdata
.lno_in_postimage
= 1;
696 lc_a
= count_lines(data_one
, size_one
);
697 lc_b
= count_lines(data_two
, size_two
);
699 "%s%s--- %s%s%s\n%s%s+++ %s%s%s\n%s%s@@ -",
700 line_prefix
, metainfo
, a_name
.buf
, name_a_tab
, reset
,
701 line_prefix
, metainfo
, b_name
.buf
, name_b_tab
, reset
,
702 line_prefix
, fraginfo
);
703 if (!o
->irreversible_delete
)
704 print_line_count(o
->file
, lc_a
);
706 fprintf(o
->file
, "?,?");
707 fprintf(o
->file
, " +");
708 print_line_count(o
->file
, lc_b
);
709 fprintf(o
->file
, " @@%s\n", reset
);
710 if (lc_a
&& !o
->irreversible_delete
)
711 emit_rewrite_lines(&ecbdata
, '-', data_one
, size_one
);
713 emit_rewrite_lines(&ecbdata
, '+', data_two
, size_two
);
715 free((char *)data_one
);
717 free((char *)data_two
);
720 struct diff_words_buffer
{
723 struct diff_words_orig
{
724 const char *begin
, *end
;
726 int orig_nr
, orig_alloc
;
729 static void diff_words_append(char *line
, unsigned long len
,
730 struct diff_words_buffer
*buffer
)
732 ALLOC_GROW(buffer
->text
.ptr
, buffer
->text
.size
+ len
, buffer
->alloc
);
735 memcpy(buffer
->text
.ptr
+ buffer
->text
.size
, line
, len
);
736 buffer
->text
.size
+= len
;
737 buffer
->text
.ptr
[buffer
->text
.size
] = '\0';
740 struct diff_words_style_elem
{
743 const char *color
; /* NULL; filled in by the setup code if
744 * color is enabled */
747 struct diff_words_style
{
748 enum diff_words_type type
;
749 struct diff_words_style_elem
new, old
, ctx
;
753 static struct diff_words_style diff_words_styles
[] = {
754 { DIFF_WORDS_PORCELAIN
, {"+", "\n"}, {"-", "\n"}, {" ", "\n"}, "~\n" },
755 { DIFF_WORDS_PLAIN
, {"{+", "+}"}, {"[-", "-]"}, {"", ""}, "\n" },
756 { DIFF_WORDS_COLOR
, {"", ""}, {"", ""}, {"", ""}, "\n" }
759 struct diff_words_data
{
760 struct diff_words_buffer minus
, plus
;
761 const char *current_plus
;
763 struct diff_options
*opt
;
765 enum diff_words_type type
;
766 struct diff_words_style
*style
;
769 static int fn_out_diff_words_write_helper(FILE *fp
,
770 struct diff_words_style_elem
*st_el
,
772 size_t count
, const char *buf
,
773 const char *line_prefix
)
778 char *p
= memchr(buf
, '\n', count
);
780 fputs(line_prefix
, fp
);
782 if (st_el
->color
&& fputs(st_el
->color
, fp
) < 0)
784 if (fputs(st_el
->prefix
, fp
) < 0 ||
785 fwrite(buf
, p
? p
- buf
: count
, 1, fp
) != 1 ||
786 fputs(st_el
->suffix
, fp
) < 0)
788 if (st_el
->color
&& *st_el
->color
789 && fputs(GIT_COLOR_RESET
, fp
) < 0)
794 if (fputs(newline
, fp
) < 0)
796 count
-= p
+ 1 - buf
;
804 * '--color-words' algorithm can be described as:
806 * 1. collect a the minus/plus lines of a diff hunk, divided into
807 * minus-lines and plus-lines;
809 * 2. break both minus-lines and plus-lines into words and
810 * place them into two mmfile_t with one word for each line;
812 * 3. use xdiff to run diff on the two mmfile_t to get the words level diff;
814 * And for the common parts of the both file, we output the plus side text.
815 * diff_words->current_plus is used to trace the current position of the plus file
816 * which printed. diff_words->last_minus is used to trace the last minus word
819 * For '--graph' to work with '--color-words', we need to output the graph prefix
820 * on each line of color words output. Generally, there are two conditions on
821 * which we should output the prefix.
823 * 1. diff_words->last_minus == 0 &&
824 * diff_words->current_plus == diff_words->plus.text.ptr
826 * that is: the plus text must start as a new line, and if there is no minus
827 * word printed, a graph prefix must be printed.
829 * 2. diff_words->current_plus > diff_words->plus.text.ptr &&
830 * *(diff_words->current_plus - 1) == '\n'
832 * that is: a graph prefix must be printed following a '\n'
834 static int color_words_output_graph_prefix(struct diff_words_data
*diff_words
)
836 if ((diff_words
->last_minus
== 0 &&
837 diff_words
->current_plus
== diff_words
->plus
.text
.ptr
) ||
838 (diff_words
->current_plus
> diff_words
->plus
.text
.ptr
&&
839 *(diff_words
->current_plus
- 1) == '\n')) {
846 static void fn_out_diff_words_aux(void *priv
, char *line
, unsigned long len
)
848 struct diff_words_data
*diff_words
= priv
;
849 struct diff_words_style
*style
= diff_words
->style
;
850 int minus_first
, minus_len
, plus_first
, plus_len
;
851 const char *minus_begin
, *minus_end
, *plus_begin
, *plus_end
;
852 struct diff_options
*opt
= diff_words
->opt
;
853 const char *line_prefix
;
855 if (line
[0] != '@' || parse_hunk_header(line
, len
,
856 &minus_first
, &minus_len
, &plus_first
, &plus_len
))
860 line_prefix
= diff_line_prefix(opt
);
862 /* POSIX requires that first be decremented by one if len == 0... */
864 minus_begin
= diff_words
->minus
.orig
[minus_first
].begin
;
866 diff_words
->minus
.orig
[minus_first
+ minus_len
- 1].end
;
868 minus_begin
= minus_end
=
869 diff_words
->minus
.orig
[minus_first
].end
;
872 plus_begin
= diff_words
->plus
.orig
[plus_first
].begin
;
873 plus_end
= diff_words
->plus
.orig
[plus_first
+ plus_len
- 1].end
;
875 plus_begin
= plus_end
= diff_words
->plus
.orig
[plus_first
].end
;
877 if (color_words_output_graph_prefix(diff_words
)) {
878 fputs(line_prefix
, diff_words
->opt
->file
);
880 if (diff_words
->current_plus
!= plus_begin
) {
881 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
882 &style
->ctx
, style
->newline
,
883 plus_begin
- diff_words
->current_plus
,
884 diff_words
->current_plus
, line_prefix
);
885 if (*(plus_begin
- 1) == '\n')
886 fputs(line_prefix
, diff_words
->opt
->file
);
888 if (minus_begin
!= minus_end
) {
889 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
890 &style
->old
, style
->newline
,
891 minus_end
- minus_begin
, minus_begin
,
894 if (plus_begin
!= plus_end
) {
895 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
896 &style
->new, style
->newline
,
897 plus_end
- plus_begin
, plus_begin
,
901 diff_words
->current_plus
= plus_end
;
902 diff_words
->last_minus
= minus_first
;
905 /* This function starts looking at *begin, and returns 0 iff a word was found. */
906 static int find_word_boundaries(mmfile_t
*buffer
, regex_t
*word_regex
,
907 int *begin
, int *end
)
909 if (word_regex
&& *begin
< buffer
->size
) {
911 if (!regexec(word_regex
, buffer
->ptr
+ *begin
, 1, match
, 0)) {
912 char *p
= memchr(buffer
->ptr
+ *begin
+ match
[0].rm_so
,
913 '\n', match
[0].rm_eo
- match
[0].rm_so
);
914 *end
= p
? p
- buffer
->ptr
: match
[0].rm_eo
+ *begin
;
915 *begin
+= match
[0].rm_so
;
916 return *begin
>= *end
;
921 /* find the next word */
922 while (*begin
< buffer
->size
&& isspace(buffer
->ptr
[*begin
]))
924 if (*begin
>= buffer
->size
)
927 /* find the end of the word */
929 while (*end
< buffer
->size
&& !isspace(buffer
->ptr
[*end
]))
936 * This function splits the words in buffer->text, stores the list with
937 * newline separator into out, and saves the offsets of the original words
940 static void diff_words_fill(struct diff_words_buffer
*buffer
, mmfile_t
*out
,
949 /* fake an empty "0th" word */
950 ALLOC_GROW(buffer
->orig
, 1, buffer
->orig_alloc
);
951 buffer
->orig
[0].begin
= buffer
->orig
[0].end
= buffer
->text
.ptr
;
954 for (i
= 0; i
< buffer
->text
.size
; i
++) {
955 if (find_word_boundaries(&buffer
->text
, word_regex
, &i
, &j
))
958 /* store original boundaries */
959 ALLOC_GROW(buffer
->orig
, buffer
->orig_nr
+ 1,
961 buffer
->orig
[buffer
->orig_nr
].begin
= buffer
->text
.ptr
+ i
;
962 buffer
->orig
[buffer
->orig_nr
].end
= buffer
->text
.ptr
+ j
;
966 ALLOC_GROW(out
->ptr
, out
->size
+ j
- i
+ 1, alloc
);
967 memcpy(out
->ptr
+ out
->size
, buffer
->text
.ptr
+ i
, j
- i
);
968 out
->ptr
[out
->size
+ j
- i
] = '\n';
969 out
->size
+= j
- i
+ 1;
975 /* this executes the word diff on the accumulated buffers */
976 static void diff_words_show(struct diff_words_data
*diff_words
)
980 mmfile_t minus
, plus
;
981 struct diff_words_style
*style
= diff_words
->style
;
983 struct diff_options
*opt
= diff_words
->opt
;
984 const char *line_prefix
;
987 line_prefix
= diff_line_prefix(opt
);
989 /* special case: only removal */
990 if (!diff_words
->plus
.text
.size
) {
991 fputs(line_prefix
, diff_words
->opt
->file
);
992 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
993 &style
->old
, style
->newline
,
994 diff_words
->minus
.text
.size
,
995 diff_words
->minus
.text
.ptr
, line_prefix
);
996 diff_words
->minus
.text
.size
= 0;
1000 diff_words
->current_plus
= diff_words
->plus
.text
.ptr
;
1001 diff_words
->last_minus
= 0;
1003 memset(&xpp
, 0, sizeof(xpp
));
1004 memset(&xecfg
, 0, sizeof(xecfg
));
1005 diff_words_fill(&diff_words
->minus
, &minus
, diff_words
->word_regex
);
1006 diff_words_fill(&diff_words
->plus
, &plus
, diff_words
->word_regex
);
1008 /* as only the hunk header will be parsed, we need a 0-context */
1010 if (xdi_diff_outf(&minus
, &plus
, fn_out_diff_words_aux
, diff_words
,
1012 die("unable to generate word diff");
1015 if (diff_words
->current_plus
!= diff_words
->plus
.text
.ptr
+
1016 diff_words
->plus
.text
.size
) {
1017 if (color_words_output_graph_prefix(diff_words
))
1018 fputs(line_prefix
, diff_words
->opt
->file
);
1019 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
1020 &style
->ctx
, style
->newline
,
1021 diff_words
->plus
.text
.ptr
+ diff_words
->plus
.text
.size
1022 - diff_words
->current_plus
, diff_words
->current_plus
,
1025 diff_words
->minus
.text
.size
= diff_words
->plus
.text
.size
= 0;
1028 /* In "color-words" mode, show word-diff of words accumulated in the buffer */
1029 static void diff_words_flush(struct emit_callback
*ecbdata
)
1031 if (ecbdata
->diff_words
->minus
.text
.size
||
1032 ecbdata
->diff_words
->plus
.text
.size
)
1033 diff_words_show(ecbdata
->diff_words
);
1036 static void diff_filespec_load_driver(struct diff_filespec
*one
)
1038 /* Use already-loaded driver */
1042 if (S_ISREG(one
->mode
))
1043 one
->driver
= userdiff_find_by_path(one
->path
);
1045 /* Fallback to default settings */
1047 one
->driver
= userdiff_find_by_name("default");
1050 static const char *userdiff_word_regex(struct diff_filespec
*one
)
1052 diff_filespec_load_driver(one
);
1053 return one
->driver
->word_regex
;
1056 static void init_diff_words_data(struct emit_callback
*ecbdata
,
1057 struct diff_options
*orig_opts
,
1058 struct diff_filespec
*one
,
1059 struct diff_filespec
*two
)
1062 struct diff_options
*o
= xmalloc(sizeof(struct diff_options
));
1063 memcpy(o
, orig_opts
, sizeof(struct diff_options
));
1065 ecbdata
->diff_words
=
1066 xcalloc(1, sizeof(struct diff_words_data
));
1067 ecbdata
->diff_words
->type
= o
->word_diff
;
1068 ecbdata
->diff_words
->opt
= o
;
1070 o
->word_regex
= userdiff_word_regex(one
);
1072 o
->word_regex
= userdiff_word_regex(two
);
1074 o
->word_regex
= diff_word_regex_cfg
;
1075 if (o
->word_regex
) {
1076 ecbdata
->diff_words
->word_regex
= (regex_t
*)
1077 xmalloc(sizeof(regex_t
));
1078 if (regcomp(ecbdata
->diff_words
->word_regex
,
1080 REG_EXTENDED
| REG_NEWLINE
))
1081 die ("Invalid regular expression: %s",
1084 for (i
= 0; i
< ARRAY_SIZE(diff_words_styles
); i
++) {
1085 if (o
->word_diff
== diff_words_styles
[i
].type
) {
1086 ecbdata
->diff_words
->style
=
1087 &diff_words_styles
[i
];
1091 if (want_color(o
->use_color
)) {
1092 struct diff_words_style
*st
= ecbdata
->diff_words
->style
;
1093 st
->old
.color
= diff_get_color_opt(o
, DIFF_FILE_OLD
);
1094 st
->new.color
= diff_get_color_opt(o
, DIFF_FILE_NEW
);
1095 st
->ctx
.color
= diff_get_color_opt(o
, DIFF_CONTEXT
);
1099 static void free_diff_words_data(struct emit_callback
*ecbdata
)
1101 if (ecbdata
->diff_words
) {
1102 diff_words_flush(ecbdata
);
1103 free (ecbdata
->diff_words
->opt
);
1104 free (ecbdata
->diff_words
->minus
.text
.ptr
);
1105 free (ecbdata
->diff_words
->minus
.orig
);
1106 free (ecbdata
->diff_words
->plus
.text
.ptr
);
1107 free (ecbdata
->diff_words
->plus
.orig
);
1108 if (ecbdata
->diff_words
->word_regex
) {
1109 regfree(ecbdata
->diff_words
->word_regex
);
1110 free(ecbdata
->diff_words
->word_regex
);
1112 free(ecbdata
->diff_words
);
1113 ecbdata
->diff_words
= NULL
;
1117 const char *diff_get_color(int diff_use_color
, enum color_diff ix
)
1119 if (want_color(diff_use_color
))
1120 return diff_colors
[ix
];
1124 const char *diff_line_prefix(struct diff_options
*opt
)
1126 struct strbuf
*msgbuf
;
1127 if (!opt
->output_prefix
)
1130 msgbuf
= opt
->output_prefix(opt
, opt
->output_prefix_data
);
1134 static unsigned long sane_truncate_line(struct emit_callback
*ecb
, char *line
, unsigned long len
)
1137 unsigned long allot
;
1141 return ecb
->truncate(line
, len
);
1145 (void) utf8_width(&cp
, &l
);
1147 break; /* truncated in the middle? */
1152 static void find_lno(const char *line
, struct emit_callback
*ecbdata
)
1155 ecbdata
->lno_in_preimage
= 0;
1156 ecbdata
->lno_in_postimage
= 0;
1157 p
= strchr(line
, '-');
1159 return; /* cannot happen */
1160 ecbdata
->lno_in_preimage
= strtol(p
+ 1, NULL
, 10);
1163 return; /* cannot happen */
1164 ecbdata
->lno_in_postimage
= strtol(p
+ 1, NULL
, 10);
1167 static void fn_out_consume(void *priv
, char *line
, unsigned long len
)
1169 struct emit_callback
*ecbdata
= priv
;
1170 const char *meta
= diff_get_color(ecbdata
->color_diff
, DIFF_METAINFO
);
1171 const char *context
= diff_get_color(ecbdata
->color_diff
, DIFF_CONTEXT
);
1172 const char *reset
= diff_get_color(ecbdata
->color_diff
, DIFF_RESET
);
1173 struct diff_options
*o
= ecbdata
->opt
;
1174 const char *line_prefix
= diff_line_prefix(o
);
1176 if (ecbdata
->header
) {
1177 fprintf(ecbdata
->opt
->file
, "%s", ecbdata
->header
->buf
);
1178 strbuf_reset(ecbdata
->header
);
1179 ecbdata
->header
= NULL
;
1181 *(ecbdata
->found_changesp
) = 1;
1183 if (ecbdata
->label_path
[0]) {
1184 const char *name_a_tab
, *name_b_tab
;
1186 name_a_tab
= strchr(ecbdata
->label_path
[0], ' ') ? "\t" : "";
1187 name_b_tab
= strchr(ecbdata
->label_path
[1], ' ') ? "\t" : "";
1189 fprintf(ecbdata
->opt
->file
, "%s%s--- %s%s%s\n",
1190 line_prefix
, meta
, ecbdata
->label_path
[0], reset
, name_a_tab
);
1191 fprintf(ecbdata
->opt
->file
, "%s%s+++ %s%s%s\n",
1192 line_prefix
, meta
, ecbdata
->label_path
[1], reset
, name_b_tab
);
1193 ecbdata
->label_path
[0] = ecbdata
->label_path
[1] = NULL
;
1196 if (diff_suppress_blank_empty
1197 && len
== 2 && line
[0] == ' ' && line
[1] == '\n') {
1202 if (line
[0] == '@') {
1203 if (ecbdata
->diff_words
)
1204 diff_words_flush(ecbdata
);
1205 len
= sane_truncate_line(ecbdata
, line
, len
);
1206 find_lno(line
, ecbdata
);
1207 emit_hunk_header(ecbdata
, line
, len
);
1208 if (line
[len
-1] != '\n')
1209 putc('\n', ecbdata
->opt
->file
);
1214 emit_line(ecbdata
->opt
, reset
, reset
, line
, len
);
1215 if (ecbdata
->diff_words
1216 && ecbdata
->diff_words
->type
== DIFF_WORDS_PORCELAIN
)
1217 fputs("~\n", ecbdata
->opt
->file
);
1221 if (ecbdata
->diff_words
) {
1222 if (line
[0] == '-') {
1223 diff_words_append(line
, len
,
1224 &ecbdata
->diff_words
->minus
);
1226 } else if (line
[0] == '+') {
1227 diff_words_append(line
, len
,
1228 &ecbdata
->diff_words
->plus
);
1230 } else if (starts_with(line
, "\\ ")) {
1232 * Eat the "no newline at eof" marker as if we
1233 * saw a "+" or "-" line with nothing on it,
1234 * and return without diff_words_flush() to
1235 * defer processing. If this is the end of
1236 * preimage, more "+" lines may come after it.
1240 diff_words_flush(ecbdata
);
1241 if (ecbdata
->diff_words
->type
== DIFF_WORDS_PORCELAIN
) {
1242 emit_line(ecbdata
->opt
, context
, reset
, line
, len
);
1243 fputs("~\n", ecbdata
->opt
->file
);
1246 * Skip the prefix character, if any. With
1247 * diff_suppress_blank_empty, there may be
1250 if (line
[0] != '\n') {
1254 emit_line(ecbdata
->opt
, context
, reset
, line
, len
);
1259 if (line
[0] != '+') {
1261 diff_get_color(ecbdata
->color_diff
,
1262 line
[0] == '-' ? DIFF_FILE_OLD
: DIFF_CONTEXT
);
1263 ecbdata
->lno_in_preimage
++;
1265 ecbdata
->lno_in_postimage
++;
1266 emit_line(ecbdata
->opt
, color
, reset
, line
, len
);
1268 ecbdata
->lno_in_postimage
++;
1269 emit_add_line(reset
, ecbdata
, line
+ 1, len
- 1);
1273 static char *pprint_rename(const char *a
, const char *b
)
1275 const char *old
= a
;
1276 const char *new = b
;
1277 struct strbuf name
= STRBUF_INIT
;
1278 int pfx_length
, sfx_length
;
1279 int pfx_adjust_for_slash
;
1280 int len_a
= strlen(a
);
1281 int len_b
= strlen(b
);
1282 int a_midlen
, b_midlen
;
1283 int qlen_a
= quote_c_style(a
, NULL
, NULL
, 0);
1284 int qlen_b
= quote_c_style(b
, NULL
, NULL
, 0);
1286 if (qlen_a
|| qlen_b
) {
1287 quote_c_style(a
, &name
, NULL
, 0);
1288 strbuf_addstr(&name
, " => ");
1289 quote_c_style(b
, &name
, NULL
, 0);
1290 return strbuf_detach(&name
, NULL
);
1293 /* Find common prefix */
1295 while (*old
&& *new && *old
== *new) {
1297 pfx_length
= old
- a
+ 1;
1302 /* Find common suffix */
1307 * If there is a common prefix, it must end in a slash. In
1308 * that case we let this loop run 1 into the prefix to see the
1311 * If there is no common prefix, we cannot do this as it would
1312 * underrun the input strings.
1314 pfx_adjust_for_slash
= (pfx_length
? 1 : 0);
1315 while (a
+ pfx_length
- pfx_adjust_for_slash
<= old
&&
1316 b
+ pfx_length
- pfx_adjust_for_slash
<= new &&
1319 sfx_length
= len_a
- (old
- a
);
1325 * pfx{mid-a => mid-b}sfx
1326 * {pfx-a => pfx-b}sfx
1327 * pfx{sfx-a => sfx-b}
1330 a_midlen
= len_a
- pfx_length
- sfx_length
;
1331 b_midlen
= len_b
- pfx_length
- sfx_length
;
1337 strbuf_grow(&name
, pfx_length
+ a_midlen
+ b_midlen
+ sfx_length
+ 7);
1338 if (pfx_length
+ sfx_length
) {
1339 strbuf_add(&name
, a
, pfx_length
);
1340 strbuf_addch(&name
, '{');
1342 strbuf_add(&name
, a
+ pfx_length
, a_midlen
);
1343 strbuf_addstr(&name
, " => ");
1344 strbuf_add(&name
, b
+ pfx_length
, b_midlen
);
1345 if (pfx_length
+ sfx_length
) {
1346 strbuf_addch(&name
, '}');
1347 strbuf_add(&name
, a
+ len_a
- sfx_length
, sfx_length
);
1349 return strbuf_detach(&name
, NULL
);
1355 struct diffstat_file
{
1359 unsigned is_unmerged
:1;
1360 unsigned is_binary
:1;
1361 unsigned is_renamed
:1;
1362 unsigned is_interesting
:1;
1363 uintmax_t added
, deleted
;
1367 static struct diffstat_file
*diffstat_add(struct diffstat_t
*diffstat
,
1371 struct diffstat_file
*x
;
1372 x
= xcalloc(1, sizeof(*x
));
1373 ALLOC_GROW(diffstat
->files
, diffstat
->nr
+ 1, diffstat
->alloc
);
1374 diffstat
->files
[diffstat
->nr
++] = x
;
1376 x
->from_name
= xstrdup(name_a
);
1377 x
->name
= xstrdup(name_b
);
1381 x
->from_name
= NULL
;
1382 x
->name
= xstrdup(name_a
);
1387 static void diffstat_consume(void *priv
, char *line
, unsigned long len
)
1389 struct diffstat_t
*diffstat
= priv
;
1390 struct diffstat_file
*x
= diffstat
->files
[diffstat
->nr
- 1];
1394 else if (line
[0] == '-')
1398 const char mime_boundary_leader
[] = "------------";
1400 static int scale_linear(int it
, int width
, int max_change
)
1405 * make sure that at least one '-' or '+' is printed if
1406 * there is any change to this path. The easiest way is to
1407 * scale linearly as if the alloted width is one column shorter
1408 * than it is, and then add 1 to the result.
1410 return 1 + (it
* (width
- 1) / max_change
);
1413 static void show_name(FILE *file
,
1414 const char *prefix
, const char *name
, int len
)
1416 fprintf(file
, " %s%-*s |", prefix
, len
, name
);
1419 static void show_graph(FILE *file
, char ch
, int cnt
, const char *set
, const char *reset
)
1423 fprintf(file
, "%s", set
);
1426 fprintf(file
, "%s", reset
);
1429 static void fill_print_name(struct diffstat_file
*file
)
1433 if (file
->print_name
)
1436 if (!file
->is_renamed
) {
1437 struct strbuf buf
= STRBUF_INIT
;
1438 if (quote_c_style(file
->name
, &buf
, NULL
, 0)) {
1439 pname
= strbuf_detach(&buf
, NULL
);
1442 strbuf_release(&buf
);
1445 pname
= pprint_rename(file
->from_name
, file
->name
);
1447 file
->print_name
= pname
;
1450 int print_stat_summary(FILE *fp
, int files
, int insertions
, int deletions
)
1452 struct strbuf sb
= STRBUF_INIT
;
1456 assert(insertions
== 0 && deletions
== 0);
1457 return fprintf(fp
, "%s\n", " 0 files changed");
1461 (files
== 1) ? " %d file changed" : " %d files changed",
1465 * For binary diff, the caller may want to print "x files
1466 * changed" with insertions == 0 && deletions == 0.
1468 * Not omitting "0 insertions(+), 0 deletions(-)" in this case
1469 * is probably less confusing (i.e skip over "2 files changed
1470 * but nothing about added/removed lines? Is this a bug in Git?").
1472 if (insertions
|| deletions
== 0) {
1474 (insertions
== 1) ? ", %d insertion(+)" : ", %d insertions(+)",
1478 if (deletions
|| insertions
== 0) {
1480 (deletions
== 1) ? ", %d deletion(-)" : ", %d deletions(-)",
1483 strbuf_addch(&sb
, '\n');
1484 ret
= fputs(sb
.buf
, fp
);
1485 strbuf_release(&sb
);
1489 static void show_stats(struct diffstat_t
*data
, struct diff_options
*options
)
1491 int i
, len
, add
, del
, adds
= 0, dels
= 0;
1492 uintmax_t max_change
= 0, max_len
= 0;
1493 int total_files
= data
->nr
, count
;
1494 int width
, name_width
, graph_width
, number_width
= 0, bin_width
= 0;
1495 const char *reset
, *add_c
, *del_c
;
1496 const char *line_prefix
= "";
1497 int extra_shown
= 0;
1502 line_prefix
= diff_line_prefix(options
);
1503 count
= options
->stat_count
? options
->stat_count
: data
->nr
;
1505 reset
= diff_get_color_opt(options
, DIFF_RESET
);
1506 add_c
= diff_get_color_opt(options
, DIFF_FILE_NEW
);
1507 del_c
= diff_get_color_opt(options
, DIFF_FILE_OLD
);
1510 * Find the longest filename and max number of changes
1512 for (i
= 0; (i
< count
) && (i
< data
->nr
); i
++) {
1513 struct diffstat_file
*file
= data
->files
[i
];
1514 uintmax_t change
= file
->added
+ file
->deleted
;
1516 if (!file
->is_interesting
&& (change
== 0)) {
1517 count
++; /* not shown == room for one more */
1520 fill_print_name(file
);
1521 len
= strlen(file
->print_name
);
1525 if (file
->is_unmerged
) {
1526 /* "Unmerged" is 8 characters */
1527 bin_width
= bin_width
< 8 ? 8 : bin_width
;
1530 if (file
->is_binary
) {
1531 /* "Bin XXX -> YYY bytes" */
1532 int w
= 14 + decimal_width(file
->added
)
1533 + decimal_width(file
->deleted
);
1534 bin_width
= bin_width
< w
? w
: bin_width
;
1535 /* Display change counts aligned with "Bin" */
1540 if (max_change
< change
)
1541 max_change
= change
;
1543 count
= i
; /* where we can stop scanning in data->files[] */
1546 * We have width = stat_width or term_columns() columns total.
1547 * We want a maximum of min(max_len, stat_name_width) for the name part.
1548 * We want a maximum of min(max_change, stat_graph_width) for the +- part.
1549 * We also need 1 for " " and 4 + decimal_width(max_change)
1550 * for " | NNNN " and one the empty column at the end, altogether
1551 * 6 + decimal_width(max_change).
1553 * If there's not enough space, we will use the smaller of
1554 * stat_name_width (if set) and 5/8*width for the filename,
1555 * and the rest for constant elements + graph part, but no more
1556 * than stat_graph_width for the graph part.
1557 * (5/8 gives 50 for filename and 30 for the constant parts + graph
1558 * for the standard terminal size).
1560 * In other words: stat_width limits the maximum width, and
1561 * stat_name_width fixes the maximum width of the filename,
1562 * and is also used to divide available columns if there
1565 * Binary files are displayed with "Bin XXX -> YYY bytes"
1566 * instead of the change count and graph. This part is treated
1567 * similarly to the graph part, except that it is not
1568 * "scaled". If total width is too small to accommodate the
1569 * guaranteed minimum width of the filename part and the
1570 * separators and this message, this message will "overflow"
1571 * making the line longer than the maximum width.
1574 if (options
->stat_width
== -1)
1575 width
= term_columns() - options
->output_prefix_length
;
1577 width
= options
->stat_width
? options
->stat_width
: 80;
1578 number_width
= decimal_width(max_change
) > number_width
?
1579 decimal_width(max_change
) : number_width
;
1581 if (options
->stat_graph_width
== -1)
1582 options
->stat_graph_width
= diff_stat_graph_width
;
1585 * Guarantee 3/8*16==6 for the graph part
1586 * and 5/8*16==10 for the filename part
1588 if (width
< 16 + 6 + number_width
)
1589 width
= 16 + 6 + number_width
;
1592 * First assign sizes that are wanted, ignoring available width.
1593 * strlen("Bin XXX -> YYY bytes") == bin_width, and the part
1594 * starting from "XXX" should fit in graph_width.
1596 graph_width
= max_change
+ 4 > bin_width
? max_change
: bin_width
- 4;
1597 if (options
->stat_graph_width
&&
1598 options
->stat_graph_width
< graph_width
)
1599 graph_width
= options
->stat_graph_width
;
1601 name_width
= (options
->stat_name_width
> 0 &&
1602 options
->stat_name_width
< max_len
) ?
1603 options
->stat_name_width
: max_len
;
1606 * Adjust adjustable widths not to exceed maximum width
1608 if (name_width
+ number_width
+ 6 + graph_width
> width
) {
1609 if (graph_width
> width
* 3/8 - number_width
- 6) {
1610 graph_width
= width
* 3/8 - number_width
- 6;
1611 if (graph_width
< 6)
1615 if (options
->stat_graph_width
&&
1616 graph_width
> options
->stat_graph_width
)
1617 graph_width
= options
->stat_graph_width
;
1618 if (name_width
> width
- number_width
- 6 - graph_width
)
1619 name_width
= width
- number_width
- 6 - graph_width
;
1621 graph_width
= width
- number_width
- 6 - name_width
;
1625 * From here name_width is the width of the name area,
1626 * and graph_width is the width of the graph area.
1627 * max_change is used to scale graph properly.
1629 for (i
= 0; i
< count
; i
++) {
1630 const char *prefix
= "";
1631 struct diffstat_file
*file
= data
->files
[i
];
1632 char *name
= file
->print_name
;
1633 uintmax_t added
= file
->added
;
1634 uintmax_t deleted
= file
->deleted
;
1637 if (!file
->is_interesting
&& (added
+ deleted
== 0))
1641 * "scale" the filename
1644 name_len
= strlen(name
);
1645 if (name_width
< name_len
) {
1649 name
+= name_len
- len
;
1650 slash
= strchr(name
, '/');
1655 if (file
->is_binary
) {
1656 fprintf(options
->file
, "%s", line_prefix
);
1657 show_name(options
->file
, prefix
, name
, len
);
1658 fprintf(options
->file
, " %*s", number_width
, "Bin");
1659 if (!added
&& !deleted
) {
1660 putc('\n', options
->file
);
1663 fprintf(options
->file
, " %s%"PRIuMAX
"%s",
1664 del_c
, deleted
, reset
);
1665 fprintf(options
->file
, " -> ");
1666 fprintf(options
->file
, "%s%"PRIuMAX
"%s",
1667 add_c
, added
, reset
);
1668 fprintf(options
->file
, " bytes");
1669 fprintf(options
->file
, "\n");
1672 else if (file
->is_unmerged
) {
1673 fprintf(options
->file
, "%s", line_prefix
);
1674 show_name(options
->file
, prefix
, name
, len
);
1675 fprintf(options
->file
, " Unmerged\n");
1680 * scale the add/delete
1685 if (graph_width
<= max_change
) {
1686 int total
= scale_linear(add
+ del
, graph_width
, max_change
);
1687 if (total
< 2 && add
&& del
)
1688 /* width >= 2 due to the sanity check */
1691 add
= scale_linear(add
, graph_width
, max_change
);
1694 del
= scale_linear(del
, graph_width
, max_change
);
1698 fprintf(options
->file
, "%s", line_prefix
);
1699 show_name(options
->file
, prefix
, name
, len
);
1700 fprintf(options
->file
, " %*"PRIuMAX
"%s",
1701 number_width
, added
+ deleted
,
1702 added
+ deleted
? " " : "");
1703 show_graph(options
->file
, '+', add
, add_c
, reset
);
1704 show_graph(options
->file
, '-', del
, del_c
, reset
);
1705 fprintf(options
->file
, "\n");
1708 for (i
= 0; i
< data
->nr
; i
++) {
1709 struct diffstat_file
*file
= data
->files
[i
];
1710 uintmax_t added
= file
->added
;
1711 uintmax_t deleted
= file
->deleted
;
1713 if (file
->is_unmerged
||
1714 (!file
->is_interesting
&& (added
+ deleted
== 0))) {
1719 if (!file
->is_binary
) {
1726 fprintf(options
->file
, "%s ...\n", line_prefix
);
1729 fprintf(options
->file
, "%s", line_prefix
);
1730 print_stat_summary(options
->file
, total_files
, adds
, dels
);
1733 static void show_shortstats(struct diffstat_t
*data
, struct diff_options
*options
)
1735 int i
, adds
= 0, dels
= 0, total_files
= data
->nr
;
1740 for (i
= 0; i
< data
->nr
; i
++) {
1741 int added
= data
->files
[i
]->added
;
1742 int deleted
= data
->files
[i
]->deleted
;
1744 if (data
->files
[i
]->is_unmerged
||
1745 (!data
->files
[i
]->is_interesting
&& (added
+ deleted
== 0))) {
1747 } else if (!data
->files
[i
]->is_binary
) { /* don't count bytes */
1752 fprintf(options
->file
, "%s", diff_line_prefix(options
));
1753 print_stat_summary(options
->file
, total_files
, adds
, dels
);
1756 static void show_numstat(struct diffstat_t
*data
, struct diff_options
*options
)
1763 for (i
= 0; i
< data
->nr
; i
++) {
1764 struct diffstat_file
*file
= data
->files
[i
];
1766 fprintf(options
->file
, "%s", diff_line_prefix(options
));
1768 if (file
->is_binary
)
1769 fprintf(options
->file
, "-\t-\t");
1771 fprintf(options
->file
,
1772 "%"PRIuMAX
"\t%"PRIuMAX
"\t",
1773 file
->added
, file
->deleted
);
1774 if (options
->line_termination
) {
1775 fill_print_name(file
);
1776 if (!file
->is_renamed
)
1777 write_name_quoted(file
->name
, options
->file
,
1778 options
->line_termination
);
1780 fputs(file
->print_name
, options
->file
);
1781 putc(options
->line_termination
, options
->file
);
1784 if (file
->is_renamed
) {
1785 putc('\0', options
->file
);
1786 write_name_quoted(file
->from_name
, options
->file
, '\0');
1788 write_name_quoted(file
->name
, options
->file
, '\0');
1793 struct dirstat_file
{
1795 unsigned long changed
;
1798 struct dirstat_dir
{
1799 struct dirstat_file
*files
;
1800 int alloc
, nr
, permille
, cumulative
;
1803 static long gather_dirstat(struct diff_options
*opt
, struct dirstat_dir
*dir
,
1804 unsigned long changed
, const char *base
, int baselen
)
1806 unsigned long this_dir
= 0;
1807 unsigned int sources
= 0;
1808 const char *line_prefix
= diff_line_prefix(opt
);
1811 struct dirstat_file
*f
= dir
->files
;
1812 int namelen
= strlen(f
->name
);
1816 if (namelen
< baselen
)
1818 if (memcmp(f
->name
, base
, baselen
))
1820 slash
= strchr(f
->name
+ baselen
, '/');
1822 int newbaselen
= slash
+ 1 - f
->name
;
1823 this = gather_dirstat(opt
, dir
, changed
, f
->name
, newbaselen
);
1835 * We don't report dirstat's for
1837 * - or cases where everything came from a single directory
1838 * under this directory (sources == 1).
1840 if (baselen
&& sources
!= 1) {
1842 int permille
= this_dir
* 1000 / changed
;
1843 if (permille
>= dir
->permille
) {
1844 fprintf(opt
->file
, "%s%4d.%01d%% %.*s\n", line_prefix
,
1845 permille
/ 10, permille
% 10, baselen
, base
);
1846 if (!dir
->cumulative
)
1854 static int dirstat_compare(const void *_a
, const void *_b
)
1856 const struct dirstat_file
*a
= _a
;
1857 const struct dirstat_file
*b
= _b
;
1858 return strcmp(a
->name
, b
->name
);
1861 static void show_dirstat(struct diff_options
*options
)
1864 unsigned long changed
;
1865 struct dirstat_dir dir
;
1866 struct diff_queue_struct
*q
= &diff_queued_diff
;
1871 dir
.permille
= options
->dirstat_permille
;
1872 dir
.cumulative
= DIFF_OPT_TST(options
, DIRSTAT_CUMULATIVE
);
1875 for (i
= 0; i
< q
->nr
; i
++) {
1876 struct diff_filepair
*p
= q
->queue
[i
];
1878 unsigned long copied
, added
, damage
;
1879 int content_changed
;
1881 name
= p
->two
->path
? p
->two
->path
: p
->one
->path
;
1883 if (p
->one
->sha1_valid
&& p
->two
->sha1_valid
)
1884 content_changed
= hashcmp(p
->one
->sha1
, p
->two
->sha1
);
1886 content_changed
= 1;
1888 if (!content_changed
) {
1890 * The SHA1 has not changed, so pre-/post-content is
1891 * identical. We can therefore skip looking at the
1892 * file contents altogether.
1898 if (DIFF_OPT_TST(options
, DIRSTAT_BY_FILE
)) {
1900 * In --dirstat-by-file mode, we don't really need to
1901 * look at the actual file contents at all.
1902 * The fact that the SHA1 changed is enough for us to
1903 * add this file to the list of results
1904 * (with each file contributing equal damage).
1910 if (DIFF_FILE_VALID(p
->one
) && DIFF_FILE_VALID(p
->two
)) {
1911 diff_populate_filespec(p
->one
, 0);
1912 diff_populate_filespec(p
->two
, 0);
1913 diffcore_count_changes(p
->one
, p
->two
, NULL
, NULL
, 0,
1915 diff_free_filespec_data(p
->one
);
1916 diff_free_filespec_data(p
->two
);
1917 } else if (DIFF_FILE_VALID(p
->one
)) {
1918 diff_populate_filespec(p
->one
, CHECK_SIZE_ONLY
);
1920 diff_free_filespec_data(p
->one
);
1921 } else if (DIFF_FILE_VALID(p
->two
)) {
1922 diff_populate_filespec(p
->two
, CHECK_SIZE_ONLY
);
1924 added
= p
->two
->size
;
1925 diff_free_filespec_data(p
->two
);
1930 * Original minus copied is the removed material,
1931 * added is the new material. They are both damages
1932 * made to the preimage.
1933 * If the resulting damage is zero, we know that
1934 * diffcore_count_changes() considers the two entries to
1935 * be identical, but since content_changed is true, we
1936 * know that there must have been _some_ kind of change,
1937 * so we force all entries to have damage > 0.
1939 damage
= (p
->one
->size
- copied
) + added
;
1944 ALLOC_GROW(dir
.files
, dir
.nr
+ 1, dir
.alloc
);
1945 dir
.files
[dir
.nr
].name
= name
;
1946 dir
.files
[dir
.nr
].changed
= damage
;
1951 /* This can happen even with many files, if everything was renames */
1955 /* Show all directories with more than x% of the changes */
1956 qsort(dir
.files
, dir
.nr
, sizeof(dir
.files
[0]), dirstat_compare
);
1957 gather_dirstat(options
, &dir
, changed
, "", 0);
1960 static void show_dirstat_by_line(struct diffstat_t
*data
, struct diff_options
*options
)
1963 unsigned long changed
;
1964 struct dirstat_dir dir
;
1972 dir
.permille
= options
->dirstat_permille
;
1973 dir
.cumulative
= DIFF_OPT_TST(options
, DIRSTAT_CUMULATIVE
);
1976 for (i
= 0; i
< data
->nr
; i
++) {
1977 struct diffstat_file
*file
= data
->files
[i
];
1978 unsigned long damage
= file
->added
+ file
->deleted
;
1979 if (file
->is_binary
)
1981 * binary files counts bytes, not lines. Must find some
1982 * way to normalize binary bytes vs. textual lines.
1983 * The following heuristic assumes that there are 64
1985 * This is stupid and ugly, but very cheap...
1987 damage
= (damage
+ 63) / 64;
1988 ALLOC_GROW(dir
.files
, dir
.nr
+ 1, dir
.alloc
);
1989 dir
.files
[dir
.nr
].name
= file
->name
;
1990 dir
.files
[dir
.nr
].changed
= damage
;
1995 /* This can happen even with many files, if everything was renames */
1999 /* Show all directories with more than x% of the changes */
2000 qsort(dir
.files
, dir
.nr
, sizeof(dir
.files
[0]), dirstat_compare
);
2001 gather_dirstat(options
, &dir
, changed
, "", 0);
2004 static void free_diffstat_info(struct diffstat_t
*diffstat
)
2007 for (i
= 0; i
< diffstat
->nr
; i
++) {
2008 struct diffstat_file
*f
= diffstat
->files
[i
];
2009 if (f
->name
!= f
->print_name
)
2010 free(f
->print_name
);
2015 free(diffstat
->files
);
2018 struct checkdiff_t
{
2019 const char *filename
;
2021 int conflict_marker_size
;
2022 struct diff_options
*o
;
2027 static int is_conflict_marker(const char *line
, int marker_size
, unsigned long len
)
2032 if (len
< marker_size
+ 1)
2034 firstchar
= line
[0];
2035 switch (firstchar
) {
2036 case '=': case '>': case '<': case '|':
2041 for (cnt
= 1; cnt
< marker_size
; cnt
++)
2042 if (line
[cnt
] != firstchar
)
2044 /* line[1] thru line[marker_size-1] are same as firstchar */
2045 if (len
< marker_size
+ 1 || !isspace(line
[marker_size
]))
2050 static void checkdiff_consume(void *priv
, char *line
, unsigned long len
)
2052 struct checkdiff_t
*data
= priv
;
2053 int marker_size
= data
->conflict_marker_size
;
2054 const char *ws
= diff_get_color(data
->o
->use_color
, DIFF_WHITESPACE
);
2055 const char *reset
= diff_get_color(data
->o
->use_color
, DIFF_RESET
);
2056 const char *set
= diff_get_color(data
->o
->use_color
, DIFF_FILE_NEW
);
2058 const char *line_prefix
;
2061 line_prefix
= diff_line_prefix(data
->o
);
2063 if (line
[0] == '+') {
2066 if (is_conflict_marker(line
+ 1, marker_size
, len
- 1)) {
2068 fprintf(data
->o
->file
,
2069 "%s%s:%d: leftover conflict marker\n",
2070 line_prefix
, data
->filename
, data
->lineno
);
2072 bad
= ws_check(line
+ 1, len
- 1, data
->ws_rule
);
2075 data
->status
|= bad
;
2076 err
= whitespace_error_string(bad
);
2077 fprintf(data
->o
->file
, "%s%s:%d: %s.\n",
2078 line_prefix
, data
->filename
, data
->lineno
, err
);
2080 emit_line(data
->o
, set
, reset
, line
, 1);
2081 ws_check_emit(line
+ 1, len
- 1, data
->ws_rule
,
2082 data
->o
->file
, set
, reset
, ws
);
2083 } else if (line
[0] == ' ') {
2085 } else if (line
[0] == '@') {
2086 char *plus
= strchr(line
, '+');
2088 data
->lineno
= strtol(plus
, NULL
, 10) - 1;
2090 die("invalid diff");
2094 static unsigned char *deflate_it(char *data
,
2096 unsigned long *result_size
)
2099 unsigned char *deflated
;
2102 git_deflate_init(&stream
, zlib_compression_level
);
2103 bound
= git_deflate_bound(&stream
, size
);
2104 deflated
= xmalloc(bound
);
2105 stream
.next_out
= deflated
;
2106 stream
.avail_out
= bound
;
2108 stream
.next_in
= (unsigned char *)data
;
2109 stream
.avail_in
= size
;
2110 while (git_deflate(&stream
, Z_FINISH
) == Z_OK
)
2112 git_deflate_end(&stream
);
2113 *result_size
= stream
.total_out
;
2117 static void emit_binary_diff_body(FILE *file
, mmfile_t
*one
, mmfile_t
*two
,
2124 unsigned long orig_size
;
2125 unsigned long delta_size
;
2126 unsigned long deflate_size
;
2127 unsigned long data_size
;
2129 /* We could do deflated delta, or we could do just deflated two,
2130 * whichever is smaller.
2133 deflated
= deflate_it(two
->ptr
, two
->size
, &deflate_size
);
2134 if (one
->size
&& two
->size
) {
2135 delta
= diff_delta(one
->ptr
, one
->size
,
2136 two
->ptr
, two
->size
,
2137 &delta_size
, deflate_size
);
2139 void *to_free
= delta
;
2140 orig_size
= delta_size
;
2141 delta
= deflate_it(delta
, delta_size
, &delta_size
);
2146 if (delta
&& delta_size
< deflate_size
) {
2147 fprintf(file
, "%sdelta %lu\n", prefix
, orig_size
);
2150 data_size
= delta_size
;
2153 fprintf(file
, "%sliteral %lu\n", prefix
, two
->size
);
2156 data_size
= deflate_size
;
2159 /* emit data encoded in base85 */
2162 int bytes
= (52 < data_size
) ? 52 : data_size
;
2166 line
[0] = bytes
+ 'A' - 1;
2168 line
[0] = bytes
- 26 + 'a' - 1;
2169 encode_85(line
+ 1, cp
, bytes
);
2170 cp
= (char *) cp
+ bytes
;
2171 fprintf(file
, "%s", prefix
);
2175 fprintf(file
, "%s\n", prefix
);
2179 static void emit_binary_diff(FILE *file
, mmfile_t
*one
, mmfile_t
*two
,
2182 fprintf(file
, "%sGIT binary patch\n", prefix
);
2183 emit_binary_diff_body(file
, one
, two
, prefix
);
2184 emit_binary_diff_body(file
, two
, one
, prefix
);
2187 int diff_filespec_is_binary(struct diff_filespec
*one
)
2189 if (one
->is_binary
== -1) {
2190 diff_filespec_load_driver(one
);
2191 if (one
->driver
->binary
!= -1)
2192 one
->is_binary
= one
->driver
->binary
;
2194 if (!one
->data
&& DIFF_FILE_VALID(one
))
2195 diff_populate_filespec(one
, CHECK_BINARY
);
2196 if (one
->is_binary
== -1 && one
->data
)
2197 one
->is_binary
= buffer_is_binary(one
->data
,
2199 if (one
->is_binary
== -1)
2203 return one
->is_binary
;
2206 static const struct userdiff_funcname
*diff_funcname_pattern(struct diff_filespec
*one
)
2208 diff_filespec_load_driver(one
);
2209 return one
->driver
->funcname
.pattern
? &one
->driver
->funcname
: NULL
;
2212 void diff_set_mnemonic_prefix(struct diff_options
*options
, const char *a
, const char *b
)
2214 if (!options
->a_prefix
)
2215 options
->a_prefix
= a
;
2216 if (!options
->b_prefix
)
2217 options
->b_prefix
= b
;
2220 struct userdiff_driver
*get_textconv(struct diff_filespec
*one
)
2222 if (!DIFF_FILE_VALID(one
))
2225 diff_filespec_load_driver(one
);
2226 return userdiff_get_textconv(one
->driver
);
2229 static void builtin_diff(const char *name_a
,
2231 struct diff_filespec
*one
,
2232 struct diff_filespec
*two
,
2233 const char *xfrm_msg
,
2234 int must_show_header
,
2235 struct diff_options
*o
,
2236 int complete_rewrite
)
2240 char *a_one
, *b_two
;
2241 const char *meta
= diff_get_color_opt(o
, DIFF_METAINFO
);
2242 const char *reset
= diff_get_color_opt(o
, DIFF_RESET
);
2243 const char *a_prefix
, *b_prefix
;
2244 struct userdiff_driver
*textconv_one
= NULL
;
2245 struct userdiff_driver
*textconv_two
= NULL
;
2246 struct strbuf header
= STRBUF_INIT
;
2247 const char *line_prefix
= diff_line_prefix(o
);
2249 if (DIFF_OPT_TST(o
, SUBMODULE_LOG
) &&
2250 (!one
->mode
|| S_ISGITLINK(one
->mode
)) &&
2251 (!two
->mode
|| S_ISGITLINK(two
->mode
))) {
2252 const char *del
= diff_get_color_opt(o
, DIFF_FILE_OLD
);
2253 const char *add
= diff_get_color_opt(o
, DIFF_FILE_NEW
);
2254 show_submodule_summary(o
->file
, one
->path
? one
->path
: two
->path
,
2256 one
->sha1
, two
->sha1
, two
->dirty_submodule
,
2257 meta
, del
, add
, reset
);
2261 if (DIFF_OPT_TST(o
, ALLOW_TEXTCONV
)) {
2262 textconv_one
= get_textconv(one
);
2263 textconv_two
= get_textconv(two
);
2266 diff_set_mnemonic_prefix(o
, "a/", "b/");
2267 if (DIFF_OPT_TST(o
, REVERSE_DIFF
)) {
2268 a_prefix
= o
->b_prefix
;
2269 b_prefix
= o
->a_prefix
;
2271 a_prefix
= o
->a_prefix
;
2272 b_prefix
= o
->b_prefix
;
2275 /* Never use a non-valid filename anywhere if at all possible */
2276 name_a
= DIFF_FILE_VALID(one
) ? name_a
: name_b
;
2277 name_b
= DIFF_FILE_VALID(two
) ? name_b
: name_a
;
2279 a_one
= quote_two(a_prefix
, name_a
+ (*name_a
== '/'));
2280 b_two
= quote_two(b_prefix
, name_b
+ (*name_b
== '/'));
2281 lbl
[0] = DIFF_FILE_VALID(one
) ? a_one
: "/dev/null";
2282 lbl
[1] = DIFF_FILE_VALID(two
) ? b_two
: "/dev/null";
2283 strbuf_addf(&header
, "%s%sdiff --git %s %s%s\n", line_prefix
, meta
, a_one
, b_two
, reset
);
2284 if (lbl
[0][0] == '/') {
2286 strbuf_addf(&header
, "%s%snew file mode %06o%s\n", line_prefix
, meta
, two
->mode
, reset
);
2288 strbuf_addstr(&header
, xfrm_msg
);
2289 must_show_header
= 1;
2291 else if (lbl
[1][0] == '/') {
2292 strbuf_addf(&header
, "%s%sdeleted file mode %06o%s\n", line_prefix
, meta
, one
->mode
, reset
);
2294 strbuf_addstr(&header
, xfrm_msg
);
2295 must_show_header
= 1;
2298 if (one
->mode
!= two
->mode
) {
2299 strbuf_addf(&header
, "%s%sold mode %06o%s\n", line_prefix
, meta
, one
->mode
, reset
);
2300 strbuf_addf(&header
, "%s%snew mode %06o%s\n", line_prefix
, meta
, two
->mode
, reset
);
2301 must_show_header
= 1;
2304 strbuf_addstr(&header
, xfrm_msg
);
2307 * we do not run diff between different kind
2310 if ((one
->mode
^ two
->mode
) & S_IFMT
)
2311 goto free_ab_and_return
;
2312 if (complete_rewrite
&&
2313 (textconv_one
|| !diff_filespec_is_binary(one
)) &&
2314 (textconv_two
|| !diff_filespec_is_binary(two
))) {
2315 fprintf(o
->file
, "%s", header
.buf
);
2316 strbuf_reset(&header
);
2317 emit_rewrite_diff(name_a
, name_b
, one
, two
,
2318 textconv_one
, textconv_two
, o
);
2319 o
->found_changes
= 1;
2320 goto free_ab_and_return
;
2324 if (o
->irreversible_delete
&& lbl
[1][0] == '/') {
2325 fprintf(o
->file
, "%s", header
.buf
);
2326 strbuf_reset(&header
);
2327 goto free_ab_and_return
;
2328 } else if (!DIFF_OPT_TST(o
, TEXT
) &&
2329 ( (!textconv_one
&& diff_filespec_is_binary(one
)) ||
2330 (!textconv_two
&& diff_filespec_is_binary(two
)) )) {
2331 if (!one
->data
&& !two
->data
&&
2332 S_ISREG(one
->mode
) && S_ISREG(two
->mode
) &&
2333 !DIFF_OPT_TST(o
, BINARY
)) {
2334 if (!hashcmp(one
->sha1
, two
->sha1
)) {
2335 if (must_show_header
)
2336 fprintf(o
->file
, "%s", header
.buf
);
2337 goto free_ab_and_return
;
2339 fprintf(o
->file
, "%s", header
.buf
);
2340 fprintf(o
->file
, "%sBinary files %s and %s differ\n",
2341 line_prefix
, lbl
[0], lbl
[1]);
2342 goto free_ab_and_return
;
2344 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
2345 die("unable to read files to diff");
2346 /* Quite common confusing case */
2347 if (mf1
.size
== mf2
.size
&&
2348 !memcmp(mf1
.ptr
, mf2
.ptr
, mf1
.size
)) {
2349 if (must_show_header
)
2350 fprintf(o
->file
, "%s", header
.buf
);
2351 goto free_ab_and_return
;
2353 fprintf(o
->file
, "%s", header
.buf
);
2354 strbuf_reset(&header
);
2355 if (DIFF_OPT_TST(o
, BINARY
))
2356 emit_binary_diff(o
->file
, &mf1
, &mf2
, line_prefix
);
2358 fprintf(o
->file
, "%sBinary files %s and %s differ\n",
2359 line_prefix
, lbl
[0], lbl
[1]);
2360 o
->found_changes
= 1;
2362 /* Crazy xdl interfaces.. */
2363 const char *diffopts
= getenv("GIT_DIFF_OPTS");
2367 struct emit_callback ecbdata
;
2368 const struct userdiff_funcname
*pe
;
2370 if (must_show_header
) {
2371 fprintf(o
->file
, "%s", header
.buf
);
2372 strbuf_reset(&header
);
2375 mf1
.size
= fill_textconv(textconv_one
, one
, &mf1
.ptr
);
2376 mf2
.size
= fill_textconv(textconv_two
, two
, &mf2
.ptr
);
2378 pe
= diff_funcname_pattern(one
);
2380 pe
= diff_funcname_pattern(two
);
2382 memset(&xpp
, 0, sizeof(xpp
));
2383 memset(&xecfg
, 0, sizeof(xecfg
));
2384 memset(&ecbdata
, 0, sizeof(ecbdata
));
2385 ecbdata
.label_path
= lbl
;
2386 ecbdata
.color_diff
= want_color(o
->use_color
);
2387 ecbdata
.found_changesp
= &o
->found_changes
;
2388 ecbdata
.ws_rule
= whitespace_rule(name_b
);
2389 if (ecbdata
.ws_rule
& WS_BLANK_AT_EOF
)
2390 check_blank_at_eof(&mf1
, &mf2
, &ecbdata
);
2392 ecbdata
.header
= header
.len
? &header
: NULL
;
2393 xpp
.flags
= o
->xdl_opts
;
2394 xecfg
.ctxlen
= o
->context
;
2395 xecfg
.interhunkctxlen
= o
->interhunkcontext
;
2396 xecfg
.flags
= XDL_EMIT_FUNCNAMES
;
2397 if (DIFF_OPT_TST(o
, FUNCCONTEXT
))
2398 xecfg
.flags
|= XDL_EMIT_FUNCCONTEXT
;
2400 xdiff_set_find_func(&xecfg
, pe
->pattern
, pe
->cflags
);
2403 else if (skip_prefix(diffopts
, "--unified=", &v
))
2404 xecfg
.ctxlen
= strtoul(v
, NULL
, 10);
2405 else if (skip_prefix(diffopts
, "-u", &v
))
2406 xecfg
.ctxlen
= strtoul(v
, NULL
, 10);
2408 init_diff_words_data(&ecbdata
, o
, one
, two
);
2409 if (xdi_diff_outf(&mf1
, &mf2
, fn_out_consume
, &ecbdata
,
2411 die("unable to generate diff for %s", one
->path
);
2413 free_diff_words_data(&ecbdata
);
2418 xdiff_clear_find_func(&xecfg
);
2422 strbuf_release(&header
);
2423 diff_free_filespec_data(one
);
2424 diff_free_filespec_data(two
);
2430 static void builtin_diffstat(const char *name_a
, const char *name_b
,
2431 struct diff_filespec
*one
,
2432 struct diff_filespec
*two
,
2433 struct diffstat_t
*diffstat
,
2434 struct diff_options
*o
,
2435 struct diff_filepair
*p
)
2438 struct diffstat_file
*data
;
2440 int complete_rewrite
= 0;
2442 if (!DIFF_PAIR_UNMERGED(p
)) {
2443 if (p
->status
== DIFF_STATUS_MODIFIED
&& p
->score
)
2444 complete_rewrite
= 1;
2447 data
= diffstat_add(diffstat
, name_a
, name_b
);
2448 data
->is_interesting
= p
->status
!= DIFF_STATUS_UNKNOWN
;
2451 data
->is_unmerged
= 1;
2455 same_contents
= !hashcmp(one
->sha1
, two
->sha1
);
2457 if (diff_filespec_is_binary(one
) || diff_filespec_is_binary(two
)) {
2458 data
->is_binary
= 1;
2459 if (same_contents
) {
2463 data
->added
= diff_filespec_size(two
);
2464 data
->deleted
= diff_filespec_size(one
);
2468 else if (complete_rewrite
) {
2469 diff_populate_filespec(one
, 0);
2470 diff_populate_filespec(two
, 0);
2471 data
->deleted
= count_lines(one
->data
, one
->size
);
2472 data
->added
= count_lines(two
->data
, two
->size
);
2475 else if (!same_contents
) {
2476 /* Crazy xdl interfaces.. */
2480 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
2481 die("unable to read files to diff");
2483 memset(&xpp
, 0, sizeof(xpp
));
2484 memset(&xecfg
, 0, sizeof(xecfg
));
2485 xpp
.flags
= o
->xdl_opts
;
2486 xecfg
.ctxlen
= o
->context
;
2487 xecfg
.interhunkctxlen
= o
->interhunkcontext
;
2488 if (xdi_diff_outf(&mf1
, &mf2
, diffstat_consume
, diffstat
,
2490 die("unable to generate diffstat for %s", one
->path
);
2493 diff_free_filespec_data(one
);
2494 diff_free_filespec_data(two
);
2497 static void builtin_checkdiff(const char *name_a
, const char *name_b
,
2498 const char *attr_path
,
2499 struct diff_filespec
*one
,
2500 struct diff_filespec
*two
,
2501 struct diff_options
*o
)
2504 struct checkdiff_t data
;
2509 memset(&data
, 0, sizeof(data
));
2510 data
.filename
= name_b
? name_b
: name_a
;
2513 data
.ws_rule
= whitespace_rule(attr_path
);
2514 data
.conflict_marker_size
= ll_merge_marker_size(attr_path
);
2516 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
2517 die("unable to read files to diff");
2520 * All the other codepaths check both sides, but not checking
2521 * the "old" side here is deliberate. We are checking the newly
2522 * introduced changes, and as long as the "new" side is text, we
2523 * can and should check what it introduces.
2525 if (diff_filespec_is_binary(two
))
2526 goto free_and_return
;
2528 /* Crazy xdl interfaces.. */
2532 memset(&xpp
, 0, sizeof(xpp
));
2533 memset(&xecfg
, 0, sizeof(xecfg
));
2534 xecfg
.ctxlen
= 1; /* at least one context line */
2536 if (xdi_diff_outf(&mf1
, &mf2
, checkdiff_consume
, &data
,
2538 die("unable to generate checkdiff for %s", one
->path
);
2540 if (data
.ws_rule
& WS_BLANK_AT_EOF
) {
2541 struct emit_callback ecbdata
;
2544 ecbdata
.ws_rule
= data
.ws_rule
;
2545 check_blank_at_eof(&mf1
, &mf2
, &ecbdata
);
2546 blank_at_eof
= ecbdata
.blank_at_eof_in_postimage
;
2551 err
= whitespace_error_string(WS_BLANK_AT_EOF
);
2552 fprintf(o
->file
, "%s:%d: %s.\n",
2553 data
.filename
, blank_at_eof
, err
);
2554 data
.status
= 1; /* report errors */
2559 diff_free_filespec_data(one
);
2560 diff_free_filespec_data(two
);
2562 DIFF_OPT_SET(o
, CHECK_FAILED
);
2565 struct diff_filespec
*alloc_filespec(const char *path
)
2567 int namelen
= strlen(path
);
2568 struct diff_filespec
*spec
= xmalloc(sizeof(*spec
) + namelen
+ 1);
2570 memset(spec
, 0, sizeof(*spec
));
2571 spec
->path
= (char *)(spec
+ 1);
2572 memcpy(spec
->path
, path
, namelen
+1);
2574 spec
->is_binary
= -1;
2578 void free_filespec(struct diff_filespec
*spec
)
2580 if (!--spec
->count
) {
2581 diff_free_filespec_data(spec
);
2586 void fill_filespec(struct diff_filespec
*spec
, const unsigned char *sha1
,
2587 int sha1_valid
, unsigned short mode
)
2590 spec
->mode
= canon_mode(mode
);
2591 hashcpy(spec
->sha1
, sha1
);
2592 spec
->sha1_valid
= sha1_valid
;
2597 * Given a name and sha1 pair, if the index tells us the file in
2598 * the work tree has that object contents, return true, so that
2599 * prepare_temp_file() does not have to inflate and extract.
2601 static int reuse_worktree_file(const char *name
, const unsigned char *sha1
, int want_file
)
2603 const struct cache_entry
*ce
;
2608 * We do not read the cache ourselves here, because the
2609 * benchmark with my previous version that always reads cache
2610 * shows that it makes things worse for diff-tree comparing
2611 * two linux-2.6 kernel trees in an already checked out work
2612 * tree. This is because most diff-tree comparisons deal with
2613 * only a small number of files, while reading the cache is
2614 * expensive for a large project, and its cost outweighs the
2615 * savings we get by not inflating the object to a temporary
2616 * file. Practically, this code only helps when we are used
2617 * by diff-cache --cached, which does read the cache before
2623 /* We want to avoid the working directory if our caller
2624 * doesn't need the data in a normal file, this system
2625 * is rather slow with its stat/open/mmap/close syscalls,
2626 * and the object is contained in a pack file. The pack
2627 * is probably already open and will be faster to obtain
2628 * the data through than the working directory. Loose
2629 * objects however would tend to be slower as they need
2630 * to be individually opened and inflated.
2632 if (!FAST_WORKING_DIRECTORY
&& !want_file
&& has_sha1_pack(sha1
))
2636 pos
= cache_name_pos(name
, len
);
2639 ce
= active_cache
[pos
];
2642 * This is not the sha1 we are looking for, or
2643 * unreusable because it is not a regular file.
2645 if (hashcmp(sha1
, ce
->sha1
) || !S_ISREG(ce
->ce_mode
))
2649 * If ce is marked as "assume unchanged", there is no
2650 * guarantee that work tree matches what we are looking for.
2652 if ((ce
->ce_flags
& CE_VALID
) || ce_skip_worktree(ce
))
2656 * If ce matches the file in the work tree, we can reuse it.
2658 if (ce_uptodate(ce
) ||
2659 (!lstat(name
, &st
) && !ce_match_stat(ce
, &st
, 0)))
2665 static int diff_populate_gitlink(struct diff_filespec
*s
, int size_only
)
2668 char *data
= xmalloc(100), *dirty
= "";
2670 /* Are we looking at the work tree? */
2671 if (s
->dirty_submodule
)
2674 len
= snprintf(data
, 100,
2675 "Subproject commit %s%s\n", sha1_to_hex(s
->sha1
), dirty
);
2687 * While doing rename detection and pickaxe operation, we may need to
2688 * grab the data for the blob (or file) for our own in-core comparison.
2689 * diff_filespec has data and size fields for this purpose.
2691 int diff_populate_filespec(struct diff_filespec
*s
, unsigned int flags
)
2693 int size_only
= flags
& CHECK_SIZE_ONLY
;
2696 * demote FAIL to WARN to allow inspecting the situation
2697 * instead of refusing.
2699 enum safe_crlf crlf_warn
= (safe_crlf
== SAFE_CRLF_FAIL
2703 if (!DIFF_FILE_VALID(s
))
2704 die("internal error: asking to populate invalid file.");
2705 if (S_ISDIR(s
->mode
))
2711 if (size_only
&& 0 < s
->size
)
2714 if (S_ISGITLINK(s
->mode
))
2715 return diff_populate_gitlink(s
, size_only
);
2717 if (!s
->sha1_valid
||
2718 reuse_worktree_file(s
->path
, s
->sha1
, 0)) {
2719 struct strbuf buf
= STRBUF_INIT
;
2723 if (lstat(s
->path
, &st
) < 0) {
2724 if (errno
== ENOENT
) {
2728 s
->data
= (char *)"";
2733 s
->size
= xsize_t(st
.st_size
);
2736 if (S_ISLNK(st
.st_mode
)) {
2737 struct strbuf sb
= STRBUF_INIT
;
2739 if (strbuf_readlink(&sb
, s
->path
, s
->size
))
2742 s
->data
= strbuf_detach(&sb
, NULL
);
2748 if ((flags
& CHECK_BINARY
) &&
2749 s
->size
> big_file_threshold
&& s
->is_binary
== -1) {
2753 fd
= open(s
->path
, O_RDONLY
);
2756 s
->data
= xmmap(NULL
, s
->size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
2758 s
->should_munmap
= 1;
2761 * Convert from working tree format to canonical git format
2763 if (convert_to_git(s
->path
, s
->data
, s
->size
, &buf
, crlf_warn
)) {
2765 munmap(s
->data
, s
->size
);
2766 s
->should_munmap
= 0;
2767 s
->data
= strbuf_detach(&buf
, &size
);
2773 enum object_type type
;
2774 if (size_only
|| (flags
& CHECK_BINARY
)) {
2775 type
= sha1_object_info(s
->sha1
, &s
->size
);
2777 die("unable to read %s", sha1_to_hex(s
->sha1
));
2780 if (s
->size
> big_file_threshold
&& s
->is_binary
== -1) {
2785 s
->data
= read_sha1_file(s
->sha1
, &type
, &s
->size
);
2787 die("unable to read %s", sha1_to_hex(s
->sha1
));
2793 void diff_free_filespec_blob(struct diff_filespec
*s
)
2797 else if (s
->should_munmap
)
2798 munmap(s
->data
, s
->size
);
2800 if (s
->should_free
|| s
->should_munmap
) {
2801 s
->should_free
= s
->should_munmap
= 0;
2806 void diff_free_filespec_data(struct diff_filespec
*s
)
2808 diff_free_filespec_blob(s
);
2813 static void prep_temp_blob(const char *path
, struct diff_tempfile
*temp
,
2816 const unsigned char *sha1
,
2820 struct strbuf buf
= STRBUF_INIT
;
2821 struct strbuf
template = STRBUF_INIT
;
2822 char *path_dup
= xstrdup(path
);
2823 const char *base
= basename(path_dup
);
2825 /* Generate "XXXXXX_basename.ext" */
2826 strbuf_addstr(&template, "XXXXXX_");
2827 strbuf_addstr(&template, base
);
2829 fd
= git_mkstemps(temp
->tmp_path
, PATH_MAX
, template.buf
,
2832 die_errno("unable to create temp-file");
2833 if (convert_to_working_tree(path
,
2834 (const char *)blob
, (size_t)size
, &buf
)) {
2838 if (write_in_full(fd
, blob
, size
) != size
)
2839 die_errno("unable to write temp-file");
2841 temp
->name
= temp
->tmp_path
;
2842 strcpy(temp
->hex
, sha1_to_hex(sha1
));
2844 sprintf(temp
->mode
, "%06o", mode
);
2845 strbuf_release(&buf
);
2846 strbuf_release(&template);
2850 static struct diff_tempfile
*prepare_temp_file(const char *name
,
2851 struct diff_filespec
*one
)
2853 struct diff_tempfile
*temp
= claim_diff_tempfile();
2855 if (!DIFF_FILE_VALID(one
)) {
2857 /* A '-' entry produces this for file-2, and
2858 * a '+' entry produces this for file-1.
2860 temp
->name
= "/dev/null";
2861 strcpy(temp
->hex
, ".");
2862 strcpy(temp
->mode
, ".");
2866 if (!remove_tempfile_installed
) {
2867 atexit(remove_tempfile
);
2868 sigchain_push_common(remove_tempfile_on_signal
);
2869 remove_tempfile_installed
= 1;
2872 if (!S_ISGITLINK(one
->mode
) &&
2873 (!one
->sha1_valid
||
2874 reuse_worktree_file(name
, one
->sha1
, 1))) {
2876 if (lstat(name
, &st
) < 0) {
2877 if (errno
== ENOENT
)
2878 goto not_a_valid_file
;
2879 die_errno("stat(%s)", name
);
2881 if (S_ISLNK(st
.st_mode
)) {
2882 struct strbuf sb
= STRBUF_INIT
;
2883 if (strbuf_readlink(&sb
, name
, st
.st_size
) < 0)
2884 die_errno("readlink(%s)", name
);
2885 prep_temp_blob(name
, temp
, sb
.buf
, sb
.len
,
2887 one
->sha1
: null_sha1
),
2889 one
->mode
: S_IFLNK
));
2890 strbuf_release(&sb
);
2893 /* we can borrow from the file in the work tree */
2895 if (!one
->sha1_valid
)
2896 strcpy(temp
->hex
, sha1_to_hex(null_sha1
));
2898 strcpy(temp
->hex
, sha1_to_hex(one
->sha1
));
2899 /* Even though we may sometimes borrow the
2900 * contents from the work tree, we always want
2901 * one->mode. mode is trustworthy even when
2902 * !(one->sha1_valid), as long as
2903 * DIFF_FILE_VALID(one).
2905 sprintf(temp
->mode
, "%06o", one
->mode
);
2910 if (diff_populate_filespec(one
, 0))
2911 die("cannot read data blob for %s", one
->path
);
2912 prep_temp_blob(name
, temp
, one
->data
, one
->size
,
2913 one
->sha1
, one
->mode
);
2918 static void add_external_diff_name(struct argv_array
*argv
,
2920 struct diff_filespec
*df
)
2922 struct diff_tempfile
*temp
= prepare_temp_file(name
, df
);
2923 argv_array_push(argv
, temp
->name
);
2924 argv_array_push(argv
, temp
->hex
);
2925 argv_array_push(argv
, temp
->mode
);
2928 /* An external diff command takes:
2930 * diff-cmd name infile1 infile1-sha1 infile1-mode \
2931 * infile2 infile2-sha1 infile2-mode [ rename-to ]
2934 static void run_external_diff(const char *pgm
,
2937 struct diff_filespec
*one
,
2938 struct diff_filespec
*two
,
2939 const char *xfrm_msg
,
2940 int complete_rewrite
,
2941 struct diff_options
*o
)
2943 struct argv_array argv
= ARGV_ARRAY_INIT
;
2944 struct argv_array env
= ARGV_ARRAY_INIT
;
2945 struct diff_queue_struct
*q
= &diff_queued_diff
;
2947 argv_array_push(&argv
, pgm
);
2948 argv_array_push(&argv
, name
);
2951 add_external_diff_name(&argv
, name
, one
);
2953 add_external_diff_name(&argv
, name
, two
);
2955 add_external_diff_name(&argv
, other
, two
);
2956 argv_array_push(&argv
, other
);
2957 argv_array_push(&argv
, xfrm_msg
);
2961 argv_array_pushf(&env
, "GIT_DIFF_PATH_COUNTER=%d", ++o
->diff_path_counter
);
2962 argv_array_pushf(&env
, "GIT_DIFF_PATH_TOTAL=%d", q
->nr
);
2964 if (run_command_v_opt_cd_env(argv
.argv
, RUN_USING_SHELL
, NULL
, env
.argv
))
2965 die(_("external diff died, stopping at %s"), name
);
2968 argv_array_clear(&argv
);
2969 argv_array_clear(&env
);
2972 static int similarity_index(struct diff_filepair
*p
)
2974 return p
->score
* 100 / MAX_SCORE
;
2977 static void fill_metainfo(struct strbuf
*msg
,
2980 struct diff_filespec
*one
,
2981 struct diff_filespec
*two
,
2982 struct diff_options
*o
,
2983 struct diff_filepair
*p
,
2984 int *must_show_header
,
2987 const char *set
= diff_get_color(use_color
, DIFF_METAINFO
);
2988 const char *reset
= diff_get_color(use_color
, DIFF_RESET
);
2989 const char *line_prefix
= diff_line_prefix(o
);
2991 *must_show_header
= 1;
2992 strbuf_init(msg
, PATH_MAX
* 2 + 300);
2993 switch (p
->status
) {
2994 case DIFF_STATUS_COPIED
:
2995 strbuf_addf(msg
, "%s%ssimilarity index %d%%",
2996 line_prefix
, set
, similarity_index(p
));
2997 strbuf_addf(msg
, "%s\n%s%scopy from ",
2998 reset
, line_prefix
, set
);
2999 quote_c_style(name
, msg
, NULL
, 0);
3000 strbuf_addf(msg
, "%s\n%s%scopy to ", reset
, line_prefix
, set
);
3001 quote_c_style(other
, msg
, NULL
, 0);
3002 strbuf_addf(msg
, "%s\n", reset
);
3004 case DIFF_STATUS_RENAMED
:
3005 strbuf_addf(msg
, "%s%ssimilarity index %d%%",
3006 line_prefix
, set
, similarity_index(p
));
3007 strbuf_addf(msg
, "%s\n%s%srename from ",
3008 reset
, line_prefix
, set
);
3009 quote_c_style(name
, msg
, NULL
, 0);
3010 strbuf_addf(msg
, "%s\n%s%srename to ",
3011 reset
, line_prefix
, set
);
3012 quote_c_style(other
, msg
, NULL
, 0);
3013 strbuf_addf(msg
, "%s\n", reset
);
3015 case DIFF_STATUS_MODIFIED
:
3017 strbuf_addf(msg
, "%s%sdissimilarity index %d%%%s\n",
3019 set
, similarity_index(p
), reset
);
3024 *must_show_header
= 0;
3026 if (one
&& two
&& hashcmp(one
->sha1
, two
->sha1
)) {
3027 int abbrev
= DIFF_OPT_TST(o
, FULL_INDEX
) ? 40 : DEFAULT_ABBREV
;
3029 if (DIFF_OPT_TST(o
, BINARY
)) {
3031 if ((!fill_mmfile(&mf
, one
) && diff_filespec_is_binary(one
)) ||
3032 (!fill_mmfile(&mf
, two
) && diff_filespec_is_binary(two
)))
3035 strbuf_addf(msg
, "%s%sindex %s..", line_prefix
, set
,
3036 find_unique_abbrev(one
->sha1
, abbrev
));
3037 strbuf_addstr(msg
, find_unique_abbrev(two
->sha1
, abbrev
));
3038 if (one
->mode
== two
->mode
)
3039 strbuf_addf(msg
, " %06o", one
->mode
);
3040 strbuf_addf(msg
, "%s\n", reset
);
3044 static void run_diff_cmd(const char *pgm
,
3047 const char *attr_path
,
3048 struct diff_filespec
*one
,
3049 struct diff_filespec
*two
,
3051 struct diff_options
*o
,
3052 struct diff_filepair
*p
)
3054 const char *xfrm_msg
= NULL
;
3055 int complete_rewrite
= (p
->status
== DIFF_STATUS_MODIFIED
) && p
->score
;
3056 int must_show_header
= 0;
3059 if (DIFF_OPT_TST(o
, ALLOW_EXTERNAL
)) {
3060 struct userdiff_driver
*drv
= userdiff_find_by_path(attr_path
);
3061 if (drv
&& drv
->external
)
3062 pgm
= drv
->external
;
3067 * don't use colors when the header is intended for an
3068 * external diff driver
3070 fill_metainfo(msg
, name
, other
, one
, two
, o
, p
,
3072 want_color(o
->use_color
) && !pgm
);
3073 xfrm_msg
= msg
->len
? msg
->buf
: NULL
;
3077 run_external_diff(pgm
, name
, other
, one
, two
, xfrm_msg
,
3078 complete_rewrite
, o
);
3082 builtin_diff(name
, other
? other
: name
,
3083 one
, two
, xfrm_msg
, must_show_header
,
3084 o
, complete_rewrite
);
3086 fprintf(o
->file
, "* Unmerged path %s\n", name
);
3089 static void diff_fill_sha1_info(struct diff_filespec
*one
)
3091 if (DIFF_FILE_VALID(one
)) {
3092 if (!one
->sha1_valid
) {
3094 if (one
->is_stdin
) {
3095 hashcpy(one
->sha1
, null_sha1
);
3098 if (lstat(one
->path
, &st
) < 0)
3099 die_errno("stat '%s'", one
->path
);
3100 if (index_path(one
->sha1
, one
->path
, &st
, 0))
3101 die("cannot hash %s", one
->path
);
3108 static void strip_prefix(int prefix_length
, const char **namep
, const char **otherp
)
3110 /* Strip the prefix but do not molest /dev/null and absolute paths */
3111 if (*namep
&& **namep
!= '/') {
3112 *namep
+= prefix_length
;
3116 if (*otherp
&& **otherp
!= '/') {
3117 *otherp
+= prefix_length
;
3118 if (**otherp
== '/')
3123 static void run_diff(struct diff_filepair
*p
, struct diff_options
*o
)
3125 const char *pgm
= external_diff();
3127 struct diff_filespec
*one
= p
->one
;
3128 struct diff_filespec
*two
= p
->two
;
3131 const char *attr_path
;
3133 name
= p
->one
->path
;
3134 other
= (strcmp(name
, p
->two
->path
) ? p
->two
->path
: NULL
);
3136 if (o
->prefix_length
)
3137 strip_prefix(o
->prefix_length
, &name
, &other
);
3139 if (!DIFF_OPT_TST(o
, ALLOW_EXTERNAL
))
3142 if (DIFF_PAIR_UNMERGED(p
)) {
3143 run_diff_cmd(pgm
, name
, NULL
, attr_path
,
3144 NULL
, NULL
, NULL
, o
, p
);
3148 diff_fill_sha1_info(one
);
3149 diff_fill_sha1_info(two
);
3152 DIFF_FILE_VALID(one
) && DIFF_FILE_VALID(two
) &&
3153 (S_IFMT
& one
->mode
) != (S_IFMT
& two
->mode
)) {
3155 * a filepair that changes between file and symlink
3156 * needs to be split into deletion and creation.
3158 struct diff_filespec
*null
= alloc_filespec(two
->path
);
3159 run_diff_cmd(NULL
, name
, other
, attr_path
,
3160 one
, null
, &msg
, o
, p
);
3162 strbuf_release(&msg
);
3164 null
= alloc_filespec(one
->path
);
3165 run_diff_cmd(NULL
, name
, other
, attr_path
,
3166 null
, two
, &msg
, o
, p
);
3170 run_diff_cmd(pgm
, name
, other
, attr_path
,
3171 one
, two
, &msg
, o
, p
);
3173 strbuf_release(&msg
);
3176 static void run_diffstat(struct diff_filepair
*p
, struct diff_options
*o
,
3177 struct diffstat_t
*diffstat
)
3182 if (DIFF_PAIR_UNMERGED(p
)) {
3184 builtin_diffstat(p
->one
->path
, NULL
, NULL
, NULL
, diffstat
, o
, p
);
3188 name
= p
->one
->path
;
3189 other
= (strcmp(name
, p
->two
->path
) ? p
->two
->path
: NULL
);
3191 if (o
->prefix_length
)
3192 strip_prefix(o
->prefix_length
, &name
, &other
);
3194 diff_fill_sha1_info(p
->one
);
3195 diff_fill_sha1_info(p
->two
);
3197 builtin_diffstat(name
, other
, p
->one
, p
->two
, diffstat
, o
, p
);
3200 static void run_checkdiff(struct diff_filepair
*p
, struct diff_options
*o
)
3204 const char *attr_path
;
3206 if (DIFF_PAIR_UNMERGED(p
)) {
3211 name
= p
->one
->path
;
3212 other
= (strcmp(name
, p
->two
->path
) ? p
->two
->path
: NULL
);
3213 attr_path
= other
? other
: name
;
3215 if (o
->prefix_length
)
3216 strip_prefix(o
->prefix_length
, &name
, &other
);
3218 diff_fill_sha1_info(p
->one
);
3219 diff_fill_sha1_info(p
->two
);
3221 builtin_checkdiff(name
, other
, attr_path
, p
->one
, p
->two
, o
);
3224 void diff_setup(struct diff_options
*options
)
3226 memcpy(options
, &default_diff_options
, sizeof(*options
));
3228 options
->file
= stdout
;
3230 options
->line_termination
= '\n';
3231 options
->break_opt
= -1;
3232 options
->rename_limit
= -1;
3233 options
->dirstat_permille
= diff_dirstat_permille_default
;
3234 options
->context
= diff_context_default
;
3235 DIFF_OPT_SET(options
, RENAME_EMPTY
);
3237 /* pathchange left =NULL by default */
3238 options
->change
= diff_change
;
3239 options
->add_remove
= diff_addremove
;
3240 options
->use_color
= diff_use_color_default
;
3241 options
->detect_rename
= diff_detect_rename_default
;
3242 options
->xdl_opts
|= diff_algorithm
;
3243 if (diff_compaction_heuristic
)
3244 DIFF_XDL_SET(options
, COMPACTION_HEURISTIC
);
3246 options
->orderfile
= diff_order_file_cfg
;
3248 if (diff_no_prefix
) {
3249 options
->a_prefix
= options
->b_prefix
= "";
3250 } else if (!diff_mnemonic_prefix
) {
3251 options
->a_prefix
= "a/";
3252 options
->b_prefix
= "b/";
3256 void diff_setup_done(struct diff_options
*options
)
3260 if (options
->set_default
)
3261 options
->set_default(options
);
3263 if (options
->output_format
& DIFF_FORMAT_NAME
)
3265 if (options
->output_format
& DIFF_FORMAT_NAME_STATUS
)
3267 if (options
->output_format
& DIFF_FORMAT_CHECKDIFF
)
3269 if (options
->output_format
& DIFF_FORMAT_NO_OUTPUT
)
3272 die("--name-only, --name-status, --check and -s are mutually exclusive");
3275 * Most of the time we can say "there are changes"
3276 * only by checking if there are changed paths, but
3277 * --ignore-whitespace* options force us to look
3281 if (DIFF_XDL_TST(options
, IGNORE_WHITESPACE
) ||
3282 DIFF_XDL_TST(options
, IGNORE_WHITESPACE_CHANGE
) ||
3283 DIFF_XDL_TST(options
, IGNORE_WHITESPACE_AT_EOL
))
3284 DIFF_OPT_SET(options
, DIFF_FROM_CONTENTS
);
3286 DIFF_OPT_CLR(options
, DIFF_FROM_CONTENTS
);
3288 if (DIFF_OPT_TST(options
, FIND_COPIES_HARDER
))
3289 options
->detect_rename
= DIFF_DETECT_COPY
;
3291 if (!DIFF_OPT_TST(options
, RELATIVE_NAME
))
3292 options
->prefix
= NULL
;
3293 if (options
->prefix
)
3294 options
->prefix_length
= strlen(options
->prefix
);
3296 options
->prefix_length
= 0;
3298 if (options
->output_format
& (DIFF_FORMAT_NAME
|
3299 DIFF_FORMAT_NAME_STATUS
|
3300 DIFF_FORMAT_CHECKDIFF
|
3301 DIFF_FORMAT_NO_OUTPUT
))
3302 options
->output_format
&= ~(DIFF_FORMAT_RAW
|
3303 DIFF_FORMAT_NUMSTAT
|
3304 DIFF_FORMAT_DIFFSTAT
|
3305 DIFF_FORMAT_SHORTSTAT
|
3306 DIFF_FORMAT_DIRSTAT
|
3307 DIFF_FORMAT_SUMMARY
|
3311 * These cases always need recursive; we do not drop caller-supplied
3312 * recursive bits for other formats here.
3314 if (options
->output_format
& (DIFF_FORMAT_PATCH
|
3315 DIFF_FORMAT_NUMSTAT
|
3316 DIFF_FORMAT_DIFFSTAT
|
3317 DIFF_FORMAT_SHORTSTAT
|
3318 DIFF_FORMAT_DIRSTAT
|
3319 DIFF_FORMAT_SUMMARY
|
3320 DIFF_FORMAT_CHECKDIFF
))
3321 DIFF_OPT_SET(options
, RECURSIVE
);
3323 * Also pickaxe would not work very well if you do not say recursive
3325 if (options
->pickaxe
)
3326 DIFF_OPT_SET(options
, RECURSIVE
);
3328 * When patches are generated, submodules diffed against the work tree
3329 * must be checked for dirtiness too so it can be shown in the output
3331 if (options
->output_format
& DIFF_FORMAT_PATCH
)
3332 DIFF_OPT_SET(options
, DIRTY_SUBMODULES
);
3334 if (options
->detect_rename
&& options
->rename_limit
< 0)
3335 options
->rename_limit
= diff_rename_limit_default
;
3336 if (options
->setup
& DIFF_SETUP_USE_CACHE
) {
3338 /* read-cache does not die even when it fails
3339 * so it is safe for us to do this here. Also
3340 * it does not smudge active_cache or active_nr
3341 * when it fails, so we do not have to worry about
3342 * cleaning it up ourselves either.
3346 if (options
->abbrev
<= 0 || 40 < options
->abbrev
)
3347 options
->abbrev
= 40; /* full */
3350 * It does not make sense to show the first hit we happened
3351 * to have found. It does not make sense not to return with
3352 * exit code in such a case either.
3354 if (DIFF_OPT_TST(options
, QUICK
)) {
3355 options
->output_format
= DIFF_FORMAT_NO_OUTPUT
;
3356 DIFF_OPT_SET(options
, EXIT_WITH_STATUS
);
3359 options
->diff_path_counter
= 0;
3361 if (DIFF_OPT_TST(options
, FOLLOW_RENAMES
) && options
->pathspec
.nr
!= 1)
3362 die(_("--follow requires exactly one pathspec"));
3365 static int opt_arg(const char *arg
, int arg_short
, const char *arg_long
, int *val
)
3375 if (c
== arg_short
) {
3379 if (val
&& isdigit(c
)) {
3381 int n
= strtoul(arg
, &end
, 10);
3392 eq
= strchrnul(arg
, '=');
3394 if (!len
|| strncmp(arg
, arg_long
, len
))
3399 if (!isdigit(*++eq
))
3401 n
= strtoul(eq
, &end
, 10);
3409 static int diff_scoreopt_parse(const char *opt
);
3411 static inline int short_opt(char opt
, const char **argv
,
3412 const char **optarg
)
3414 const char *arg
= argv
[0];
3415 if (arg
[0] != '-' || arg
[1] != opt
)
3417 if (arg
[2] != '\0') {
3422 die("Option '%c' requires a value", opt
);
3427 int parse_long_opt(const char *opt
, const char **argv
,
3428 const char **optarg
)
3430 const char *arg
= argv
[0];
3431 if (!skip_prefix(arg
, "--", &arg
))
3433 if (!skip_prefix(arg
, opt
, &arg
))
3435 if (*arg
== '=') { /* stuck form: --option=value */
3441 /* separate form: --option value */
3443 die("Option '--%s' requires a value", opt
);
3448 static int stat_opt(struct diff_options
*options
, const char **av
)
3450 const char *arg
= av
[0];
3452 int width
= options
->stat_width
;
3453 int name_width
= options
->stat_name_width
;
3454 int graph_width
= options
->stat_graph_width
;
3455 int count
= options
->stat_count
;
3458 if (!skip_prefix(arg
, "--stat", &arg
))
3459 die("BUG: stat option does not begin with --stat: %s", arg
);
3464 if (skip_prefix(arg
, "-width", &arg
)) {
3466 width
= strtoul(arg
+ 1, &end
, 10);
3467 else if (!*arg
&& !av
[1])
3468 die("Option '--stat-width' requires a value");
3470 width
= strtoul(av
[1], &end
, 10);
3473 } else if (skip_prefix(arg
, "-name-width", &arg
)) {
3475 name_width
= strtoul(arg
+ 1, &end
, 10);
3476 else if (!*arg
&& !av
[1])
3477 die("Option '--stat-name-width' requires a value");
3479 name_width
= strtoul(av
[1], &end
, 10);
3482 } else if (skip_prefix(arg
, "-graph-width", &arg
)) {
3484 graph_width
= strtoul(arg
+ 1, &end
, 10);
3485 else if (!*arg
&& !av
[1])
3486 die("Option '--stat-graph-width' requires a value");
3488 graph_width
= strtoul(av
[1], &end
, 10);
3491 } else if (skip_prefix(arg
, "-count", &arg
)) {
3493 count
= strtoul(arg
+ 1, &end
, 10);
3494 else if (!*arg
&& !av
[1])
3495 die("Option '--stat-count' requires a value");
3497 count
= strtoul(av
[1], &end
, 10);
3503 width
= strtoul(arg
+1, &end
, 10);
3505 name_width
= strtoul(end
+1, &end
, 10);
3507 count
= strtoul(end
+1, &end
, 10);
3510 /* Important! This checks all the error cases! */
3513 options
->output_format
|= DIFF_FORMAT_DIFFSTAT
;
3514 options
->stat_name_width
= name_width
;
3515 options
->stat_graph_width
= graph_width
;
3516 options
->stat_width
= width
;
3517 options
->stat_count
= count
;
3521 static int parse_dirstat_opt(struct diff_options
*options
, const char *params
)
3523 struct strbuf errmsg
= STRBUF_INIT
;
3524 if (parse_dirstat_params(options
, params
, &errmsg
))
3525 die(_("Failed to parse --dirstat/-X option parameter:\n%s"),
3527 strbuf_release(&errmsg
);
3529 * The caller knows a dirstat-related option is given from the command
3530 * line; allow it to say "return this_function();"
3532 options
->output_format
|= DIFF_FORMAT_DIRSTAT
;
3536 static int parse_submodule_opt(struct diff_options
*options
, const char *value
)
3538 if (parse_submodule_params(options
, value
))
3539 die(_("Failed to parse --submodule option parameter: '%s'"),
3544 static const char diff_status_letters
[] = {
3547 DIFF_STATUS_DELETED
,
3548 DIFF_STATUS_MODIFIED
,
3549 DIFF_STATUS_RENAMED
,
3550 DIFF_STATUS_TYPE_CHANGED
,
3551 DIFF_STATUS_UNKNOWN
,
3552 DIFF_STATUS_UNMERGED
,
3553 DIFF_STATUS_FILTER_AON
,
3554 DIFF_STATUS_FILTER_BROKEN
,
3558 static unsigned int filter_bit
['Z' + 1];
3560 static void prepare_filter_bits(void)
3564 if (!filter_bit
[DIFF_STATUS_ADDED
]) {
3565 for (i
= 0; diff_status_letters
[i
]; i
++)
3566 filter_bit
[(int) diff_status_letters
[i
]] = (1 << i
);
3570 static unsigned filter_bit_tst(char status
, const struct diff_options
*opt
)
3572 return opt
->filter
& filter_bit
[(int) status
];
3575 static int parse_diff_filter_opt(const char *optarg
, struct diff_options
*opt
)
3579 prepare_filter_bits();
3582 * If there is a negation e.g. 'd' in the input, and we haven't
3583 * initialized the filter field with another --diff-filter, start
3584 * from full set of bits, except for AON.
3587 for (i
= 0; (optch
= optarg
[i
]) != '\0'; i
++) {
3588 if (optch
< 'a' || 'z' < optch
)
3590 opt
->filter
= (1 << (ARRAY_SIZE(diff_status_letters
) - 1)) - 1;
3591 opt
->filter
&= ~filter_bit
[DIFF_STATUS_FILTER_AON
];
3596 for (i
= 0; (optch
= optarg
[i
]) != '\0'; i
++) {
3600 if ('a' <= optch
&& optch
<= 'z') {
3602 optch
= toupper(optch
);
3607 bit
= (0 <= optch
&& optch
<= 'Z') ? filter_bit
[optch
] : 0;
3611 opt
->filter
&= ~bit
;
3618 static void enable_patch_output(int *fmt
) {
3619 *fmt
&= ~DIFF_FORMAT_NO_OUTPUT
;
3620 *fmt
|= DIFF_FORMAT_PATCH
;
3623 int diff_opt_parse(struct diff_options
*options
, const char **av
, int ac
)
3625 const char *arg
= av
[0];
3629 /* Output format options */
3630 if (!strcmp(arg
, "-p") || !strcmp(arg
, "-u") || !strcmp(arg
, "--patch")
3631 || opt_arg(arg
, 'U', "unified", &options
->context
))
3632 enable_patch_output(&options
->output_format
);
3633 else if (!strcmp(arg
, "--raw"))
3634 options
->output_format
|= DIFF_FORMAT_RAW
;
3635 else if (!strcmp(arg
, "--patch-with-raw")) {
3636 enable_patch_output(&options
->output_format
);
3637 options
->output_format
|= DIFF_FORMAT_RAW
;
3638 } else if (!strcmp(arg
, "--numstat"))
3639 options
->output_format
|= DIFF_FORMAT_NUMSTAT
;
3640 else if (!strcmp(arg
, "--shortstat"))
3641 options
->output_format
|= DIFF_FORMAT_SHORTSTAT
;
3642 else if (!strcmp(arg
, "-X") || !strcmp(arg
, "--dirstat"))
3643 return parse_dirstat_opt(options
, "");
3644 else if (skip_prefix(arg
, "-X", &arg
))
3645 return parse_dirstat_opt(options
, arg
);
3646 else if (skip_prefix(arg
, "--dirstat=", &arg
))
3647 return parse_dirstat_opt(options
, arg
);
3648 else if (!strcmp(arg
, "--cumulative"))
3649 return parse_dirstat_opt(options
, "cumulative");
3650 else if (!strcmp(arg
, "--dirstat-by-file"))
3651 return parse_dirstat_opt(options
, "files");
3652 else if (skip_prefix(arg
, "--dirstat-by-file=", &arg
)) {
3653 parse_dirstat_opt(options
, "files");
3654 return parse_dirstat_opt(options
, arg
);
3656 else if (!strcmp(arg
, "--check"))
3657 options
->output_format
|= DIFF_FORMAT_CHECKDIFF
;
3658 else if (!strcmp(arg
, "--summary"))
3659 options
->output_format
|= DIFF_FORMAT_SUMMARY
;
3660 else if (!strcmp(arg
, "--patch-with-stat")) {
3661 enable_patch_output(&options
->output_format
);
3662 options
->output_format
|= DIFF_FORMAT_DIFFSTAT
;
3663 } else if (!strcmp(arg
, "--name-only"))
3664 options
->output_format
|= DIFF_FORMAT_NAME
;
3665 else if (!strcmp(arg
, "--name-status"))
3666 options
->output_format
|= DIFF_FORMAT_NAME_STATUS
;
3667 else if (!strcmp(arg
, "-s") || !strcmp(arg
, "--no-patch"))
3668 options
->output_format
|= DIFF_FORMAT_NO_OUTPUT
;
3669 else if (starts_with(arg
, "--stat"))
3670 /* --stat, --stat-width, --stat-name-width, or --stat-count */
3671 return stat_opt(options
, av
);
3673 /* renames options */
3674 else if (starts_with(arg
, "-B") || starts_with(arg
, "--break-rewrites=") ||
3675 !strcmp(arg
, "--break-rewrites")) {
3676 if ((options
->break_opt
= diff_scoreopt_parse(arg
)) == -1)
3677 return error("invalid argument to -B: %s", arg
+2);
3679 else if (starts_with(arg
, "-M") || starts_with(arg
, "--find-renames=") ||
3680 !strcmp(arg
, "--find-renames")) {
3681 if ((options
->rename_score
= diff_scoreopt_parse(arg
)) == -1)
3682 return error("invalid argument to -M: %s", arg
+2);
3683 options
->detect_rename
= DIFF_DETECT_RENAME
;
3685 else if (!strcmp(arg
, "-D") || !strcmp(arg
, "--irreversible-delete")) {
3686 options
->irreversible_delete
= 1;
3688 else if (starts_with(arg
, "-C") || starts_with(arg
, "--find-copies=") ||
3689 !strcmp(arg
, "--find-copies")) {
3690 if (options
->detect_rename
== DIFF_DETECT_COPY
)
3691 DIFF_OPT_SET(options
, FIND_COPIES_HARDER
);
3692 if ((options
->rename_score
= diff_scoreopt_parse(arg
)) == -1)
3693 return error("invalid argument to -C: %s", arg
+2);
3694 options
->detect_rename
= DIFF_DETECT_COPY
;
3696 else if (!strcmp(arg
, "--no-renames"))
3697 options
->detect_rename
= 0;
3698 else if (!strcmp(arg
, "--rename-empty"))
3699 DIFF_OPT_SET(options
, RENAME_EMPTY
);
3700 else if (!strcmp(arg
, "--no-rename-empty"))
3701 DIFF_OPT_CLR(options
, RENAME_EMPTY
);
3702 else if (!strcmp(arg
, "--relative"))
3703 DIFF_OPT_SET(options
, RELATIVE_NAME
);
3704 else if (skip_prefix(arg
, "--relative=", &arg
)) {
3705 DIFF_OPT_SET(options
, RELATIVE_NAME
);
3706 options
->prefix
= arg
;
3710 else if (!strcmp(arg
, "--minimal"))
3711 DIFF_XDL_SET(options
, NEED_MINIMAL
);
3712 else if (!strcmp(arg
, "--no-minimal"))
3713 DIFF_XDL_CLR(options
, NEED_MINIMAL
);
3714 else if (!strcmp(arg
, "-w") || !strcmp(arg
, "--ignore-all-space"))
3715 DIFF_XDL_SET(options
, IGNORE_WHITESPACE
);
3716 else if (!strcmp(arg
, "-b") || !strcmp(arg
, "--ignore-space-change"))
3717 DIFF_XDL_SET(options
, IGNORE_WHITESPACE_CHANGE
);
3718 else if (!strcmp(arg
, "--ignore-space-at-eol"))
3719 DIFF_XDL_SET(options
, IGNORE_WHITESPACE_AT_EOL
);
3720 else if (!strcmp(arg
, "--ignore-blank-lines"))
3721 DIFF_XDL_SET(options
, IGNORE_BLANK_LINES
);
3722 else if (!strcmp(arg
, "--compaction-heuristic"))
3723 DIFF_XDL_SET(options
, COMPACTION_HEURISTIC
);
3724 else if (!strcmp(arg
, "--no-compaction-heuristic"))
3725 DIFF_XDL_CLR(options
, COMPACTION_HEURISTIC
);
3726 else if (!strcmp(arg
, "--patience"))
3727 options
->xdl_opts
= DIFF_WITH_ALG(options
, PATIENCE_DIFF
);
3728 else if (!strcmp(arg
, "--histogram"))
3729 options
->xdl_opts
= DIFF_WITH_ALG(options
, HISTOGRAM_DIFF
);
3730 else if ((argcount
= parse_long_opt("diff-algorithm", av
, &optarg
))) {
3731 long value
= parse_algorithm_value(optarg
);
3733 return error("option diff-algorithm accepts \"myers\", "
3734 "\"minimal\", \"patience\" and \"histogram\"");
3735 /* clear out previous settings */
3736 DIFF_XDL_CLR(options
, NEED_MINIMAL
);
3737 options
->xdl_opts
&= ~XDF_DIFF_ALGORITHM_MASK
;
3738 options
->xdl_opts
|= value
;
3743 else if (!strcmp(arg
, "--binary")) {
3744 enable_patch_output(&options
->output_format
);
3745 DIFF_OPT_SET(options
, BINARY
);
3747 else if (!strcmp(arg
, "--full-index"))
3748 DIFF_OPT_SET(options
, FULL_INDEX
);
3749 else if (!strcmp(arg
, "-a") || !strcmp(arg
, "--text"))
3750 DIFF_OPT_SET(options
, TEXT
);
3751 else if (!strcmp(arg
, "-R"))
3752 DIFF_OPT_SET(options
, REVERSE_DIFF
);
3753 else if (!strcmp(arg
, "--find-copies-harder"))
3754 DIFF_OPT_SET(options
, FIND_COPIES_HARDER
);
3755 else if (!strcmp(arg
, "--follow"))
3756 DIFF_OPT_SET(options
, FOLLOW_RENAMES
);
3757 else if (!strcmp(arg
, "--no-follow"))
3758 DIFF_OPT_CLR(options
, FOLLOW_RENAMES
);
3759 else if (!strcmp(arg
, "--color"))
3760 options
->use_color
= 1;
3761 else if (skip_prefix(arg
, "--color=", &arg
)) {
3762 int value
= git_config_colorbool(NULL
, arg
);
3764 return error("option `color' expects \"always\", \"auto\", or \"never\"");
3765 options
->use_color
= value
;
3767 else if (!strcmp(arg
, "--no-color"))
3768 options
->use_color
= 0;
3769 else if (!strcmp(arg
, "--color-words")) {
3770 options
->use_color
= 1;
3771 options
->word_diff
= DIFF_WORDS_COLOR
;
3773 else if (skip_prefix(arg
, "--color-words=", &arg
)) {
3774 options
->use_color
= 1;
3775 options
->word_diff
= DIFF_WORDS_COLOR
;
3776 options
->word_regex
= arg
;
3778 else if (!strcmp(arg
, "--word-diff")) {
3779 if (options
->word_diff
== DIFF_WORDS_NONE
)
3780 options
->word_diff
= DIFF_WORDS_PLAIN
;
3782 else if (skip_prefix(arg
, "--word-diff=", &arg
)) {
3783 if (!strcmp(arg
, "plain"))
3784 options
->word_diff
= DIFF_WORDS_PLAIN
;
3785 else if (!strcmp(arg
, "color")) {
3786 options
->use_color
= 1;
3787 options
->word_diff
= DIFF_WORDS_COLOR
;
3789 else if (!strcmp(arg
, "porcelain"))
3790 options
->word_diff
= DIFF_WORDS_PORCELAIN
;
3791 else if (!strcmp(arg
, "none"))
3792 options
->word_diff
= DIFF_WORDS_NONE
;
3794 die("bad --word-diff argument: %s", arg
);
3796 else if ((argcount
= parse_long_opt("word-diff-regex", av
, &optarg
))) {
3797 if (options
->word_diff
== DIFF_WORDS_NONE
)
3798 options
->word_diff
= DIFF_WORDS_PLAIN
;
3799 options
->word_regex
= optarg
;
3802 else if (!strcmp(arg
, "--exit-code"))
3803 DIFF_OPT_SET(options
, EXIT_WITH_STATUS
);
3804 else if (!strcmp(arg
, "--quiet"))
3805 DIFF_OPT_SET(options
, QUICK
);
3806 else if (!strcmp(arg
, "--ext-diff"))
3807 DIFF_OPT_SET(options
, ALLOW_EXTERNAL
);
3808 else if (!strcmp(arg
, "--no-ext-diff"))
3809 DIFF_OPT_CLR(options
, ALLOW_EXTERNAL
);
3810 else if (!strcmp(arg
, "--textconv"))
3811 DIFF_OPT_SET(options
, ALLOW_TEXTCONV
);
3812 else if (!strcmp(arg
, "--no-textconv"))
3813 DIFF_OPT_CLR(options
, ALLOW_TEXTCONV
);
3814 else if (!strcmp(arg
, "--ignore-submodules")) {
3815 DIFF_OPT_SET(options
, OVERRIDE_SUBMODULE_CONFIG
);
3816 handle_ignore_submodules_arg(options
, "all");
3817 } else if (skip_prefix(arg
, "--ignore-submodules=", &arg
)) {
3818 DIFF_OPT_SET(options
, OVERRIDE_SUBMODULE_CONFIG
);
3819 handle_ignore_submodules_arg(options
, arg
);
3820 } else if (!strcmp(arg
, "--submodule"))
3821 DIFF_OPT_SET(options
, SUBMODULE_LOG
);
3822 else if (skip_prefix(arg
, "--submodule=", &arg
))
3823 return parse_submodule_opt(options
, arg
);
3826 else if (!strcmp(arg
, "-z"))
3827 options
->line_termination
= 0;
3828 else if ((argcount
= short_opt('l', av
, &optarg
))) {
3829 options
->rename_limit
= strtoul(optarg
, NULL
, 10);
3832 else if ((argcount
= short_opt('S', av
, &optarg
))) {
3833 options
->pickaxe
= optarg
;
3834 options
->pickaxe_opts
|= DIFF_PICKAXE_KIND_S
;
3836 } else if ((argcount
= short_opt('G', av
, &optarg
))) {
3837 options
->pickaxe
= optarg
;
3838 options
->pickaxe_opts
|= DIFF_PICKAXE_KIND_G
;
3841 else if (!strcmp(arg
, "--pickaxe-all"))
3842 options
->pickaxe_opts
|= DIFF_PICKAXE_ALL
;
3843 else if (!strcmp(arg
, "--pickaxe-regex"))
3844 options
->pickaxe_opts
|= DIFF_PICKAXE_REGEX
;
3845 else if ((argcount
= short_opt('O', av
, &optarg
))) {
3846 options
->orderfile
= optarg
;
3849 else if ((argcount
= parse_long_opt("diff-filter", av
, &optarg
))) {
3850 int offending
= parse_diff_filter_opt(optarg
, options
);
3852 die("unknown change class '%c' in --diff-filter=%s",
3856 else if (!strcmp(arg
, "--abbrev"))
3857 options
->abbrev
= DEFAULT_ABBREV
;
3858 else if (skip_prefix(arg
, "--abbrev=", &arg
)) {
3859 options
->abbrev
= strtoul(arg
, NULL
, 10);
3860 if (options
->abbrev
< MINIMUM_ABBREV
)
3861 options
->abbrev
= MINIMUM_ABBREV
;
3862 else if (40 < options
->abbrev
)
3863 options
->abbrev
= 40;
3865 else if ((argcount
= parse_long_opt("src-prefix", av
, &optarg
))) {
3866 options
->a_prefix
= optarg
;
3869 else if ((argcount
= parse_long_opt("dst-prefix", av
, &optarg
))) {
3870 options
->b_prefix
= optarg
;
3873 else if (!strcmp(arg
, "--no-prefix"))
3874 options
->a_prefix
= options
->b_prefix
= "";
3875 else if (opt_arg(arg
, '\0', "inter-hunk-context",
3876 &options
->interhunkcontext
))
3878 else if (!strcmp(arg
, "-W"))
3879 DIFF_OPT_SET(options
, FUNCCONTEXT
);
3880 else if (!strcmp(arg
, "--function-context"))
3881 DIFF_OPT_SET(options
, FUNCCONTEXT
);
3882 else if (!strcmp(arg
, "--no-function-context"))
3883 DIFF_OPT_CLR(options
, FUNCCONTEXT
);
3884 else if ((argcount
= parse_long_opt("output", av
, &optarg
))) {
3885 options
->file
= fopen(optarg
, "w");
3887 die_errno("Could not open '%s'", optarg
);
3888 options
->close_file
= 1;
3895 int parse_rename_score(const char **cp_p
)
3897 unsigned long num
, scale
;
3899 const char *cp
= *cp_p
;
3906 if ( !dot
&& ch
== '.' ) {
3909 } else if ( ch
== '%' ) {
3910 scale
= dot
? scale
*100 : 100;
3911 cp
++; /* % is always at the end */
3913 } else if ( ch
>= '0' && ch
<= '9' ) {
3914 if ( scale
< 100000 ) {
3916 num
= (num
*10) + (ch
-'0');
3925 /* user says num divided by scale and we say internally that
3926 * is MAX_SCORE * num / scale.
3928 return (int)((num
>= scale
) ? MAX_SCORE
: (MAX_SCORE
* num
/ scale
));
3931 static int diff_scoreopt_parse(const char *opt
)
3933 int opt1
, opt2
, cmd
;
3939 /* convert the long-form arguments into short-form versions */
3940 if (skip_prefix(opt
, "break-rewrites", &opt
)) {
3941 if (*opt
== 0 || *opt
++ == '=')
3943 } else if (skip_prefix(opt
, "find-copies", &opt
)) {
3944 if (*opt
== 0 || *opt
++ == '=')
3946 } else if (skip_prefix(opt
, "find-renames", &opt
)) {
3947 if (*opt
== 0 || *opt
++ == '=')
3951 if (cmd
!= 'M' && cmd
!= 'C' && cmd
!= 'B')
3952 return -1; /* that is not a -M, -C, or -B option */
3954 opt1
= parse_rename_score(&opt
);
3960 else if (*opt
!= '/')
3961 return -1; /* we expect -B80/99 or -B80 */
3964 opt2
= parse_rename_score(&opt
);
3969 return opt1
| (opt2
<< 16);
3972 struct diff_queue_struct diff_queued_diff
;
3974 void diff_q(struct diff_queue_struct
*queue
, struct diff_filepair
*dp
)
3976 ALLOC_GROW(queue
->queue
, queue
->nr
+ 1, queue
->alloc
);
3977 queue
->queue
[queue
->nr
++] = dp
;
3980 struct diff_filepair
*diff_queue(struct diff_queue_struct
*queue
,
3981 struct diff_filespec
*one
,
3982 struct diff_filespec
*two
)
3984 struct diff_filepair
*dp
= xcalloc(1, sizeof(*dp
));
3992 void diff_free_filepair(struct diff_filepair
*p
)
3994 free_filespec(p
->one
);
3995 free_filespec(p
->two
);
3999 /* This is different from find_unique_abbrev() in that
4000 * it stuffs the result with dots for alignment.
4002 const char *diff_unique_abbrev(const unsigned char *sha1
, int len
)
4007 return sha1_to_hex(sha1
);
4009 abbrev
= find_unique_abbrev(sha1
, len
);
4010 abblen
= strlen(abbrev
);
4012 static char hex
[41];
4013 if (len
< abblen
&& abblen
<= len
+ 2)
4014 sprintf(hex
, "%s%.*s", abbrev
, len
+3-abblen
, "..");
4016 sprintf(hex
, "%s...", abbrev
);
4019 return sha1_to_hex(sha1
);
4022 static void diff_flush_raw(struct diff_filepair
*p
, struct diff_options
*opt
)
4024 int line_termination
= opt
->line_termination
;
4025 int inter_name_termination
= line_termination
? '\t' : '\0';
4027 fprintf(opt
->file
, "%s", diff_line_prefix(opt
));
4028 if (!(opt
->output_format
& DIFF_FORMAT_NAME_STATUS
)) {
4029 fprintf(opt
->file
, ":%06o %06o %s ", p
->one
->mode
, p
->two
->mode
,
4030 diff_unique_abbrev(p
->one
->sha1
, opt
->abbrev
));
4031 fprintf(opt
->file
, "%s ", diff_unique_abbrev(p
->two
->sha1
, opt
->abbrev
));
4034 fprintf(opt
->file
, "%c%03d%c", p
->status
, similarity_index(p
),
4035 inter_name_termination
);
4037 fprintf(opt
->file
, "%c%c", p
->status
, inter_name_termination
);
4040 if (p
->status
== DIFF_STATUS_COPIED
||
4041 p
->status
== DIFF_STATUS_RENAMED
) {
4042 const char *name_a
, *name_b
;
4043 name_a
= p
->one
->path
;
4044 name_b
= p
->two
->path
;
4045 strip_prefix(opt
->prefix_length
, &name_a
, &name_b
);
4046 write_name_quoted(name_a
, opt
->file
, inter_name_termination
);
4047 write_name_quoted(name_b
, opt
->file
, line_termination
);
4049 const char *name_a
, *name_b
;
4050 name_a
= p
->one
->mode
? p
->one
->path
: p
->two
->path
;
4052 strip_prefix(opt
->prefix_length
, &name_a
, &name_b
);
4053 write_name_quoted(name_a
, opt
->file
, line_termination
);
4057 int diff_unmodified_pair(struct diff_filepair
*p
)
4059 /* This function is written stricter than necessary to support
4060 * the currently implemented transformers, but the idea is to
4061 * let transformers to produce diff_filepairs any way they want,
4062 * and filter and clean them up here before producing the output.
4064 struct diff_filespec
*one
= p
->one
, *two
= p
->two
;
4066 if (DIFF_PAIR_UNMERGED(p
))
4067 return 0; /* unmerged is interesting */
4069 /* deletion, addition, mode or type change
4070 * and rename are all interesting.
4072 if (DIFF_FILE_VALID(one
) != DIFF_FILE_VALID(two
) ||
4073 DIFF_PAIR_MODE_CHANGED(p
) ||
4074 strcmp(one
->path
, two
->path
))
4077 /* both are valid and point at the same path. that is, we are
4078 * dealing with a change.
4080 if (one
->sha1_valid
&& two
->sha1_valid
&&
4081 !hashcmp(one
->sha1
, two
->sha1
) &&
4082 !one
->dirty_submodule
&& !two
->dirty_submodule
)
4083 return 1; /* no change */
4084 if (!one
->sha1_valid
&& !two
->sha1_valid
)
4085 return 1; /* both look at the same file on the filesystem. */
4089 static void diff_flush_patch(struct diff_filepair
*p
, struct diff_options
*o
)
4091 if (diff_unmodified_pair(p
))
4094 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
4095 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
4096 return; /* no tree diffs in patch format */
4101 static void diff_flush_stat(struct diff_filepair
*p
, struct diff_options
*o
,
4102 struct diffstat_t
*diffstat
)
4104 if (diff_unmodified_pair(p
))
4107 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
4108 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
4109 return; /* no useful stat for tree diffs */
4111 run_diffstat(p
, o
, diffstat
);
4114 static void diff_flush_checkdiff(struct diff_filepair
*p
,
4115 struct diff_options
*o
)
4117 if (diff_unmodified_pair(p
))
4120 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
4121 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
4122 return; /* nothing to check in tree diffs */
4124 run_checkdiff(p
, o
);
4127 int diff_queue_is_empty(void)
4129 struct diff_queue_struct
*q
= &diff_queued_diff
;
4131 for (i
= 0; i
< q
->nr
; i
++)
4132 if (!diff_unmodified_pair(q
->queue
[i
]))
4138 void diff_debug_filespec(struct diff_filespec
*s
, int x
, const char *one
)
4140 fprintf(stderr
, "queue[%d] %s (%s) %s %06o %s\n",
4143 DIFF_FILE_VALID(s
) ? "valid" : "invalid",
4145 s
->sha1_valid
? sha1_to_hex(s
->sha1
) : "");
4146 fprintf(stderr
, "queue[%d] %s size %lu\n",
4151 void diff_debug_filepair(const struct diff_filepair
*p
, int i
)
4153 diff_debug_filespec(p
->one
, i
, "one");
4154 diff_debug_filespec(p
->two
, i
, "two");
4155 fprintf(stderr
, "score %d, status %c rename_used %d broken %d\n",
4156 p
->score
, p
->status
? p
->status
: '?',
4157 p
->one
->rename_used
, p
->broken_pair
);
4160 void diff_debug_queue(const char *msg
, struct diff_queue_struct
*q
)
4164 fprintf(stderr
, "%s\n", msg
);
4165 fprintf(stderr
, "q->nr = %d\n", q
->nr
);
4166 for (i
= 0; i
< q
->nr
; i
++) {
4167 struct diff_filepair
*p
= q
->queue
[i
];
4168 diff_debug_filepair(p
, i
);
4173 static void diff_resolve_rename_copy(void)
4176 struct diff_filepair
*p
;
4177 struct diff_queue_struct
*q
= &diff_queued_diff
;
4179 diff_debug_queue("resolve-rename-copy", q
);
4181 for (i
= 0; i
< q
->nr
; i
++) {
4183 p
->status
= 0; /* undecided */
4184 if (DIFF_PAIR_UNMERGED(p
))
4185 p
->status
= DIFF_STATUS_UNMERGED
;
4186 else if (!DIFF_FILE_VALID(p
->one
))
4187 p
->status
= DIFF_STATUS_ADDED
;
4188 else if (!DIFF_FILE_VALID(p
->two
))
4189 p
->status
= DIFF_STATUS_DELETED
;
4190 else if (DIFF_PAIR_TYPE_CHANGED(p
))
4191 p
->status
= DIFF_STATUS_TYPE_CHANGED
;
4193 /* from this point on, we are dealing with a pair
4194 * whose both sides are valid and of the same type, i.e.
4195 * either in-place edit or rename/copy edit.
4197 else if (DIFF_PAIR_RENAME(p
)) {
4199 * A rename might have re-connected a broken
4200 * pair up, causing the pathnames to be the
4201 * same again. If so, that's not a rename at
4202 * all, just a modification..
4204 * Otherwise, see if this source was used for
4205 * multiple renames, in which case we decrement
4206 * the count, and call it a copy.
4208 if (!strcmp(p
->one
->path
, p
->two
->path
))
4209 p
->status
= DIFF_STATUS_MODIFIED
;
4210 else if (--p
->one
->rename_used
> 0)
4211 p
->status
= DIFF_STATUS_COPIED
;
4213 p
->status
= DIFF_STATUS_RENAMED
;
4215 else if (hashcmp(p
->one
->sha1
, p
->two
->sha1
) ||
4216 p
->one
->mode
!= p
->two
->mode
||
4217 p
->one
->dirty_submodule
||
4218 p
->two
->dirty_submodule
||
4219 is_null_sha1(p
->one
->sha1
))
4220 p
->status
= DIFF_STATUS_MODIFIED
;
4222 /* This is a "no-change" entry and should not
4223 * happen anymore, but prepare for broken callers.
4225 error("feeding unmodified %s to diffcore",
4227 p
->status
= DIFF_STATUS_UNKNOWN
;
4230 diff_debug_queue("resolve-rename-copy done", q
);
4233 static int check_pair_status(struct diff_filepair
*p
)
4235 switch (p
->status
) {
4236 case DIFF_STATUS_UNKNOWN
:
4239 die("internal error in diff-resolve-rename-copy");
4245 static void flush_one_pair(struct diff_filepair
*p
, struct diff_options
*opt
)
4247 int fmt
= opt
->output_format
;
4249 if (fmt
& DIFF_FORMAT_CHECKDIFF
)
4250 diff_flush_checkdiff(p
, opt
);
4251 else if (fmt
& (DIFF_FORMAT_RAW
| DIFF_FORMAT_NAME_STATUS
))
4252 diff_flush_raw(p
, opt
);
4253 else if (fmt
& DIFF_FORMAT_NAME
) {
4254 const char *name_a
, *name_b
;
4255 name_a
= p
->two
->path
;
4257 strip_prefix(opt
->prefix_length
, &name_a
, &name_b
);
4258 write_name_quoted(name_a
, opt
->file
, opt
->line_termination
);
4262 static void show_file_mode_name(FILE *file
, const char *newdelete
, struct diff_filespec
*fs
)
4265 fprintf(file
, " %s mode %06o ", newdelete
, fs
->mode
);
4267 fprintf(file
, " %s ", newdelete
);
4268 write_name_quoted(fs
->path
, file
, '\n');
4272 static void show_mode_change(FILE *file
, struct diff_filepair
*p
, int show_name
,
4273 const char *line_prefix
)
4275 if (p
->one
->mode
&& p
->two
->mode
&& p
->one
->mode
!= p
->two
->mode
) {
4276 fprintf(file
, "%s mode change %06o => %06o%c", line_prefix
, p
->one
->mode
,
4277 p
->two
->mode
, show_name
? ' ' : '\n');
4279 write_name_quoted(p
->two
->path
, file
, '\n');
4284 static void show_rename_copy(FILE *file
, const char *renamecopy
, struct diff_filepair
*p
,
4285 const char *line_prefix
)
4287 char *names
= pprint_rename(p
->one
->path
, p
->two
->path
);
4289 fprintf(file
, " %s %s (%d%%)\n", renamecopy
, names
, similarity_index(p
));
4291 show_mode_change(file
, p
, 0, line_prefix
);
4294 static void diff_summary(struct diff_options
*opt
, struct diff_filepair
*p
)
4296 FILE *file
= opt
->file
;
4297 const char *line_prefix
= diff_line_prefix(opt
);
4300 case DIFF_STATUS_DELETED
:
4301 fputs(line_prefix
, file
);
4302 show_file_mode_name(file
, "delete", p
->one
);
4304 case DIFF_STATUS_ADDED
:
4305 fputs(line_prefix
, file
);
4306 show_file_mode_name(file
, "create", p
->two
);
4308 case DIFF_STATUS_COPIED
:
4309 fputs(line_prefix
, file
);
4310 show_rename_copy(file
, "copy", p
, line_prefix
);
4312 case DIFF_STATUS_RENAMED
:
4313 fputs(line_prefix
, file
);
4314 show_rename_copy(file
, "rename", p
, line_prefix
);
4318 fprintf(file
, "%s rewrite ", line_prefix
);
4319 write_name_quoted(p
->two
->path
, file
, ' ');
4320 fprintf(file
, "(%d%%)\n", similarity_index(p
));
4322 show_mode_change(file
, p
, !p
->score
, line_prefix
);
4332 static int remove_space(char *line
, int len
)
4338 for (i
= 0; i
< len
; i
++)
4339 if (!isspace((c
= line
[i
])))
4345 static void patch_id_consume(void *priv
, char *line
, unsigned long len
)
4347 struct patch_id_t
*data
= priv
;
4350 /* Ignore line numbers when computing the SHA1 of the patch */
4351 if (starts_with(line
, "@@ -"))
4354 new_len
= remove_space(line
, len
);
4356 git_SHA1_Update(data
->ctx
, line
, new_len
);
4357 data
->patchlen
+= new_len
;
4360 /* returns 0 upon success, and writes result into sha1 */
4361 static int diff_get_patch_id(struct diff_options
*options
, unsigned char *sha1
)
4363 struct diff_queue_struct
*q
= &diff_queued_diff
;
4366 struct patch_id_t data
;
4367 char buffer
[PATH_MAX
* 4 + 20];
4369 git_SHA1_Init(&ctx
);
4370 memset(&data
, 0, sizeof(struct patch_id_t
));
4373 for (i
= 0; i
< q
->nr
; i
++) {
4377 struct diff_filepair
*p
= q
->queue
[i
];
4380 memset(&xpp
, 0, sizeof(xpp
));
4381 memset(&xecfg
, 0, sizeof(xecfg
));
4383 return error("internal diff status error");
4384 if (p
->status
== DIFF_STATUS_UNKNOWN
)
4386 if (diff_unmodified_pair(p
))
4388 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
4389 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
4391 if (DIFF_PAIR_UNMERGED(p
))
4394 diff_fill_sha1_info(p
->one
);
4395 diff_fill_sha1_info(p
->two
);
4396 if (fill_mmfile(&mf1
, p
->one
) < 0 ||
4397 fill_mmfile(&mf2
, p
->two
) < 0)
4398 return error("unable to read files to diff");
4400 len1
= remove_space(p
->one
->path
, strlen(p
->one
->path
));
4401 len2
= remove_space(p
->two
->path
, strlen(p
->two
->path
));
4402 if (p
->one
->mode
== 0)
4403 len1
= snprintf(buffer
, sizeof(buffer
),
4404 "diff--gita/%.*sb/%.*s"
4411 len2
, p
->two
->path
);
4412 else if (p
->two
->mode
== 0)
4413 len1
= snprintf(buffer
, sizeof(buffer
),
4414 "diff--gita/%.*sb/%.*s"
4415 "deletedfilemode%06o"
4421 len1
, p
->one
->path
);
4423 len1
= snprintf(buffer
, sizeof(buffer
),
4424 "diff--gita/%.*sb/%.*s"
4430 len2
, p
->two
->path
);
4431 git_SHA1_Update(&ctx
, buffer
, len1
);
4433 if (diff_filespec_is_binary(p
->one
) ||
4434 diff_filespec_is_binary(p
->two
)) {
4435 git_SHA1_Update(&ctx
, sha1_to_hex(p
->one
->sha1
), 40);
4436 git_SHA1_Update(&ctx
, sha1_to_hex(p
->two
->sha1
), 40);
4443 if (xdi_diff_outf(&mf1
, &mf2
, patch_id_consume
, &data
,
4445 return error("unable to generate patch-id diff for %s",
4449 git_SHA1_Final(sha1
, &ctx
);
4453 int diff_flush_patch_id(struct diff_options
*options
, unsigned char *sha1
)
4455 struct diff_queue_struct
*q
= &diff_queued_diff
;
4457 int result
= diff_get_patch_id(options
, sha1
);
4459 for (i
= 0; i
< q
->nr
; i
++)
4460 diff_free_filepair(q
->queue
[i
]);
4463 DIFF_QUEUE_CLEAR(q
);
4468 static int is_summary_empty(const struct diff_queue_struct
*q
)
4472 for (i
= 0; i
< q
->nr
; i
++) {
4473 const struct diff_filepair
*p
= q
->queue
[i
];
4475 switch (p
->status
) {
4476 case DIFF_STATUS_DELETED
:
4477 case DIFF_STATUS_ADDED
:
4478 case DIFF_STATUS_COPIED
:
4479 case DIFF_STATUS_RENAMED
:
4484 if (p
->one
->mode
&& p
->two
->mode
&&
4485 p
->one
->mode
!= p
->two
->mode
)
4493 static const char rename_limit_warning
[] =
4494 "inexact rename detection was skipped due to too many files.";
4496 static const char degrade_cc_to_c_warning
[] =
4497 "only found copies from modified paths due to too many files.";
4499 static const char rename_limit_advice
[] =
4500 "you may want to set your %s variable to at least "
4501 "%d and retry the command.";
4503 void diff_warn_rename_limit(const char *varname
, int needed
, int degraded_cc
)
4506 warning(degrade_cc_to_c_warning
);
4508 warning(rename_limit_warning
);
4511 if (0 < needed
&& needed
< 32767)
4512 warning(rename_limit_advice
, varname
, needed
);
4515 void diff_flush(struct diff_options
*options
)
4517 struct diff_queue_struct
*q
= &diff_queued_diff
;
4518 int i
, output_format
= options
->output_format
;
4520 int dirstat_by_line
= 0;
4523 * Order: raw, stat, summary, patch
4524 * or: name/name-status/checkdiff (other bits clear)
4529 if (output_format
& (DIFF_FORMAT_RAW
|
4531 DIFF_FORMAT_NAME_STATUS
|
4532 DIFF_FORMAT_CHECKDIFF
)) {
4533 for (i
= 0; i
< q
->nr
; i
++) {
4534 struct diff_filepair
*p
= q
->queue
[i
];
4535 if (check_pair_status(p
))
4536 flush_one_pair(p
, options
);
4541 if (output_format
& DIFF_FORMAT_DIRSTAT
&& DIFF_OPT_TST(options
, DIRSTAT_BY_LINE
))
4542 dirstat_by_line
= 1;
4544 if (output_format
& (DIFF_FORMAT_DIFFSTAT
|DIFF_FORMAT_SHORTSTAT
|DIFF_FORMAT_NUMSTAT
) ||
4546 struct diffstat_t diffstat
;
4548 memset(&diffstat
, 0, sizeof(struct diffstat_t
));
4549 for (i
= 0; i
< q
->nr
; i
++) {
4550 struct diff_filepair
*p
= q
->queue
[i
];
4551 if (check_pair_status(p
))
4552 diff_flush_stat(p
, options
, &diffstat
);
4554 if (output_format
& DIFF_FORMAT_NUMSTAT
)
4555 show_numstat(&diffstat
, options
);
4556 if (output_format
& DIFF_FORMAT_DIFFSTAT
)
4557 show_stats(&diffstat
, options
);
4558 if (output_format
& DIFF_FORMAT_SHORTSTAT
)
4559 show_shortstats(&diffstat
, options
);
4560 if (output_format
& DIFF_FORMAT_DIRSTAT
&& dirstat_by_line
)
4561 show_dirstat_by_line(&diffstat
, options
);
4562 free_diffstat_info(&diffstat
);
4565 if ((output_format
& DIFF_FORMAT_DIRSTAT
) && !dirstat_by_line
)
4566 show_dirstat(options
);
4568 if (output_format
& DIFF_FORMAT_SUMMARY
&& !is_summary_empty(q
)) {
4569 for (i
= 0; i
< q
->nr
; i
++) {
4570 diff_summary(options
, q
->queue
[i
]);
4575 if (output_format
& DIFF_FORMAT_NO_OUTPUT
&&
4576 DIFF_OPT_TST(options
, EXIT_WITH_STATUS
) &&
4577 DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
)) {
4579 * run diff_flush_patch for the exit status. setting
4580 * options->file to /dev/null should be safe, because we
4581 * aren't supposed to produce any output anyway.
4583 if (options
->close_file
)
4584 fclose(options
->file
);
4585 options
->file
= fopen("/dev/null", "w");
4587 die_errno("Could not open /dev/null");
4588 options
->close_file
= 1;
4589 for (i
= 0; i
< q
->nr
; i
++) {
4590 struct diff_filepair
*p
= q
->queue
[i
];
4591 if (check_pair_status(p
))
4592 diff_flush_patch(p
, options
);
4593 if (options
->found_changes
)
4598 if (output_format
& DIFF_FORMAT_PATCH
) {
4600 fprintf(options
->file
, "%s%c",
4601 diff_line_prefix(options
),
4602 options
->line_termination
);
4603 if (options
->stat_sep
) {
4604 /* attach patch instead of inline */
4605 fputs(options
->stat_sep
, options
->file
);
4609 for (i
= 0; i
< q
->nr
; i
++) {
4610 struct diff_filepair
*p
= q
->queue
[i
];
4611 if (check_pair_status(p
))
4612 diff_flush_patch(p
, options
);
4616 if (output_format
& DIFF_FORMAT_CALLBACK
)
4617 options
->format_callback(q
, options
, options
->format_callback_data
);
4619 for (i
= 0; i
< q
->nr
; i
++)
4620 diff_free_filepair(q
->queue
[i
]);
4623 DIFF_QUEUE_CLEAR(q
);
4624 if (options
->close_file
)
4625 fclose(options
->file
);
4628 * Report the content-level differences with HAS_CHANGES;
4629 * diff_addremove/diff_change does not set the bit when
4630 * DIFF_FROM_CONTENTS is in effect (e.g. with -w).
4632 if (DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
)) {
4633 if (options
->found_changes
)
4634 DIFF_OPT_SET(options
, HAS_CHANGES
);
4636 DIFF_OPT_CLR(options
, HAS_CHANGES
);
4640 static int match_filter(const struct diff_options
*options
, const struct diff_filepair
*p
)
4642 return (((p
->status
== DIFF_STATUS_MODIFIED
) &&
4644 filter_bit_tst(DIFF_STATUS_FILTER_BROKEN
, options
)) ||
4646 filter_bit_tst(DIFF_STATUS_MODIFIED
, options
)))) ||
4647 ((p
->status
!= DIFF_STATUS_MODIFIED
) &&
4648 filter_bit_tst(p
->status
, options
)));
4651 static void diffcore_apply_filter(struct diff_options
*options
)
4654 struct diff_queue_struct
*q
= &diff_queued_diff
;
4655 struct diff_queue_struct outq
;
4657 DIFF_QUEUE_CLEAR(&outq
);
4659 if (!options
->filter
)
4662 if (filter_bit_tst(DIFF_STATUS_FILTER_AON
, options
)) {
4664 for (i
= found
= 0; !found
&& i
< q
->nr
; i
++) {
4665 if (match_filter(options
, q
->queue
[i
]))
4671 /* otherwise we will clear the whole queue
4672 * by copying the empty outq at the end of this
4673 * function, but first clear the current entries
4676 for (i
= 0; i
< q
->nr
; i
++)
4677 diff_free_filepair(q
->queue
[i
]);
4680 /* Only the matching ones */
4681 for (i
= 0; i
< q
->nr
; i
++) {
4682 struct diff_filepair
*p
= q
->queue
[i
];
4683 if (match_filter(options
, p
))
4686 diff_free_filepair(p
);
4693 /* Check whether two filespecs with the same mode and size are identical */
4694 static int diff_filespec_is_identical(struct diff_filespec
*one
,
4695 struct diff_filespec
*two
)
4697 if (S_ISGITLINK(one
->mode
))
4699 if (diff_populate_filespec(one
, 0))
4701 if (diff_populate_filespec(two
, 0))
4703 return !memcmp(one
->data
, two
->data
, one
->size
);
4706 static int diff_filespec_check_stat_unmatch(struct diff_filepair
*p
)
4708 if (p
->done_skip_stat_unmatch
)
4709 return p
->skip_stat_unmatch_result
;
4711 p
->done_skip_stat_unmatch
= 1;
4712 p
->skip_stat_unmatch_result
= 0;
4714 * 1. Entries that come from stat info dirtiness
4715 * always have both sides (iow, not create/delete),
4716 * one side of the object name is unknown, with
4717 * the same mode and size. Keep the ones that
4718 * do not match these criteria. They have real
4721 * 2. At this point, the file is known to be modified,
4722 * with the same mode and size, and the object
4723 * name of one side is unknown. Need to inspect
4724 * the identical contents.
4726 if (!DIFF_FILE_VALID(p
->one
) || /* (1) */
4727 !DIFF_FILE_VALID(p
->two
) ||
4728 (p
->one
->sha1_valid
&& p
->two
->sha1_valid
) ||
4729 (p
->one
->mode
!= p
->two
->mode
) ||
4730 diff_populate_filespec(p
->one
, CHECK_SIZE_ONLY
) ||
4731 diff_populate_filespec(p
->two
, CHECK_SIZE_ONLY
) ||
4732 (p
->one
->size
!= p
->two
->size
) ||
4733 !diff_filespec_is_identical(p
->one
, p
->two
)) /* (2) */
4734 p
->skip_stat_unmatch_result
= 1;
4735 return p
->skip_stat_unmatch_result
;
4738 static void diffcore_skip_stat_unmatch(struct diff_options
*diffopt
)
4741 struct diff_queue_struct
*q
= &diff_queued_diff
;
4742 struct diff_queue_struct outq
;
4743 DIFF_QUEUE_CLEAR(&outq
);
4745 for (i
= 0; i
< q
->nr
; i
++) {
4746 struct diff_filepair
*p
= q
->queue
[i
];
4748 if (diff_filespec_check_stat_unmatch(p
))
4752 * The caller can subtract 1 from skip_stat_unmatch
4753 * to determine how many paths were dirty only
4754 * due to stat info mismatch.
4756 if (!DIFF_OPT_TST(diffopt
, NO_INDEX
))
4757 diffopt
->skip_stat_unmatch
++;
4758 diff_free_filepair(p
);
4765 static int diffnamecmp(const void *a_
, const void *b_
)
4767 const struct diff_filepair
*a
= *((const struct diff_filepair
**)a_
);
4768 const struct diff_filepair
*b
= *((const struct diff_filepair
**)b_
);
4769 const char *name_a
, *name_b
;
4771 name_a
= a
->one
? a
->one
->path
: a
->two
->path
;
4772 name_b
= b
->one
? b
->one
->path
: b
->two
->path
;
4773 return strcmp(name_a
, name_b
);
4776 void diffcore_fix_diff_index(struct diff_options
*options
)
4778 struct diff_queue_struct
*q
= &diff_queued_diff
;
4779 qsort(q
->queue
, q
->nr
, sizeof(q
->queue
[0]), diffnamecmp
);
4782 void diffcore_std(struct diff_options
*options
)
4784 /* NOTE please keep the following in sync with diff_tree_combined() */
4785 if (options
->skip_stat_unmatch
)
4786 diffcore_skip_stat_unmatch(options
);
4787 if (!options
->found_follow
) {
4788 /* See try_to_follow_renames() in tree-diff.c */
4789 if (options
->break_opt
!= -1)
4790 diffcore_break(options
->break_opt
);
4791 if (options
->detect_rename
)
4792 diffcore_rename(options
);
4793 if (options
->break_opt
!= -1)
4794 diffcore_merge_broken();
4796 if (options
->pickaxe
)
4797 diffcore_pickaxe(options
);
4798 if (options
->orderfile
)
4799 diffcore_order(options
->orderfile
);
4800 if (!options
->found_follow
)
4801 /* See try_to_follow_renames() in tree-diff.c */
4802 diff_resolve_rename_copy();
4803 diffcore_apply_filter(options
);
4805 if (diff_queued_diff
.nr
&& !DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
))
4806 DIFF_OPT_SET(options
, HAS_CHANGES
);
4808 DIFF_OPT_CLR(options
, HAS_CHANGES
);
4810 options
->found_follow
= 0;
4813 int diff_result_code(struct diff_options
*opt
, int status
)
4817 diff_warn_rename_limit("diff.renameLimit",
4818 opt
->needed_rename_limit
,
4819 opt
->degraded_cc_to_c
);
4820 if (!DIFF_OPT_TST(opt
, EXIT_WITH_STATUS
) &&
4821 !(opt
->output_format
& DIFF_FORMAT_CHECKDIFF
))
4823 if (DIFF_OPT_TST(opt
, EXIT_WITH_STATUS
) &&
4824 DIFF_OPT_TST(opt
, HAS_CHANGES
))
4826 if ((opt
->output_format
& DIFF_FORMAT_CHECKDIFF
) &&
4827 DIFF_OPT_TST(opt
, CHECK_FAILED
))
4832 int diff_can_quit_early(struct diff_options
*opt
)
4834 return (DIFF_OPT_TST(opt
, QUICK
) &&
4836 DIFF_OPT_TST(opt
, HAS_CHANGES
));
4840 * Shall changes to this submodule be ignored?
4842 * Submodule changes can be configured to be ignored separately for each path,
4843 * but that configuration can be overridden from the command line.
4845 static int is_submodule_ignored(const char *path
, struct diff_options
*options
)
4848 unsigned orig_flags
= options
->flags
;
4849 if (!DIFF_OPT_TST(options
, OVERRIDE_SUBMODULE_CONFIG
))
4850 set_diffopt_flags_from_submodule_config(options
, path
);
4851 if (DIFF_OPT_TST(options
, IGNORE_SUBMODULES
))
4853 options
->flags
= orig_flags
;
4857 void diff_addremove(struct diff_options
*options
,
4858 int addremove
, unsigned mode
,
4859 const unsigned char *sha1
,
4861 const char *concatpath
, unsigned dirty_submodule
)
4863 struct diff_filespec
*one
, *two
;
4865 if (S_ISGITLINK(mode
) && is_submodule_ignored(concatpath
, options
))
4868 /* This may look odd, but it is a preparation for
4869 * feeding "there are unchanged files which should
4870 * not produce diffs, but when you are doing copy
4871 * detection you would need them, so here they are"
4872 * entries to the diff-core. They will be prefixed
4873 * with something like '=' or '*' (I haven't decided
4874 * which but should not make any difference).
4875 * Feeding the same new and old to diff_change()
4876 * also has the same effect.
4877 * Before the final output happens, they are pruned after
4878 * merged into rename/copy pairs as appropriate.
4880 if (DIFF_OPT_TST(options
, REVERSE_DIFF
))
4881 addremove
= (addremove
== '+' ? '-' :
4882 addremove
== '-' ? '+' : addremove
);
4884 if (options
->prefix
&&
4885 strncmp(concatpath
, options
->prefix
, options
->prefix_length
))
4888 one
= alloc_filespec(concatpath
);
4889 two
= alloc_filespec(concatpath
);
4891 if (addremove
!= '+')
4892 fill_filespec(one
, sha1
, sha1_valid
, mode
);
4893 if (addremove
!= '-') {
4894 fill_filespec(two
, sha1
, sha1_valid
, mode
);
4895 two
->dirty_submodule
= dirty_submodule
;
4898 diff_queue(&diff_queued_diff
, one
, two
);
4899 if (!DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
))
4900 DIFF_OPT_SET(options
, HAS_CHANGES
);
4903 void diff_change(struct diff_options
*options
,
4904 unsigned old_mode
, unsigned new_mode
,
4905 const unsigned char *old_sha1
,
4906 const unsigned char *new_sha1
,
4907 int old_sha1_valid
, int new_sha1_valid
,
4908 const char *concatpath
,
4909 unsigned old_dirty_submodule
, unsigned new_dirty_submodule
)
4911 struct diff_filespec
*one
, *two
;
4912 struct diff_filepair
*p
;
4914 if (S_ISGITLINK(old_mode
) && S_ISGITLINK(new_mode
) &&
4915 is_submodule_ignored(concatpath
, options
))
4918 if (DIFF_OPT_TST(options
, REVERSE_DIFF
)) {
4920 const unsigned char *tmp_c
;
4921 tmp
= old_mode
; old_mode
= new_mode
; new_mode
= tmp
;
4922 tmp_c
= old_sha1
; old_sha1
= new_sha1
; new_sha1
= tmp_c
;
4923 tmp
= old_sha1_valid
; old_sha1_valid
= new_sha1_valid
;
4924 new_sha1_valid
= tmp
;
4925 tmp
= old_dirty_submodule
; old_dirty_submodule
= new_dirty_submodule
;
4926 new_dirty_submodule
= tmp
;
4929 if (options
->prefix
&&
4930 strncmp(concatpath
, options
->prefix
, options
->prefix_length
))
4933 one
= alloc_filespec(concatpath
);
4934 two
= alloc_filespec(concatpath
);
4935 fill_filespec(one
, old_sha1
, old_sha1_valid
, old_mode
);
4936 fill_filespec(two
, new_sha1
, new_sha1_valid
, new_mode
);
4937 one
->dirty_submodule
= old_dirty_submodule
;
4938 two
->dirty_submodule
= new_dirty_submodule
;
4939 p
= diff_queue(&diff_queued_diff
, one
, two
);
4941 if (DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
))
4944 if (DIFF_OPT_TST(options
, QUICK
) && options
->skip_stat_unmatch
&&
4945 !diff_filespec_check_stat_unmatch(p
))
4948 DIFF_OPT_SET(options
, HAS_CHANGES
);
4951 struct diff_filepair
*diff_unmerge(struct diff_options
*options
, const char *path
)
4953 struct diff_filepair
*pair
;
4954 struct diff_filespec
*one
, *two
;
4956 if (options
->prefix
&&
4957 strncmp(path
, options
->prefix
, options
->prefix_length
))
4960 one
= alloc_filespec(path
);
4961 two
= alloc_filespec(path
);
4962 pair
= diff_queue(&diff_queued_diff
, one
, two
);
4963 pair
->is_unmerged
= 1;
4967 static char *run_textconv(const char *pgm
, struct diff_filespec
*spec
,
4970 struct diff_tempfile
*temp
;
4971 const char *argv
[3];
4972 const char **arg
= argv
;
4973 struct child_process child
= CHILD_PROCESS_INIT
;
4974 struct strbuf buf
= STRBUF_INIT
;
4977 temp
= prepare_temp_file(spec
->path
, spec
);
4979 *arg
++ = temp
->name
;
4982 child
.use_shell
= 1;
4985 if (start_command(&child
)) {
4990 if (strbuf_read(&buf
, child
.out
, 0) < 0)
4991 err
= error("error reading from textconv command '%s'", pgm
);
4994 if (finish_command(&child
) || err
) {
4995 strbuf_release(&buf
);
5001 return strbuf_detach(&buf
, outsize
);
5004 size_t fill_textconv(struct userdiff_driver
*driver
,
5005 struct diff_filespec
*df
,
5010 if (!driver
|| !driver
->textconv
) {
5011 if (!DIFF_FILE_VALID(df
)) {
5015 if (diff_populate_filespec(df
, 0))
5016 die("unable to read files to diff");
5021 if (driver
->textconv_cache
&& df
->sha1_valid
) {
5022 *outbuf
= notes_cache_get(driver
->textconv_cache
, df
->sha1
,
5028 *outbuf
= run_textconv(driver
->textconv
, df
, &size
);
5030 die("unable to read files to diff");
5032 if (driver
->textconv_cache
&& df
->sha1_valid
) {
5033 /* ignore errors, as we might be in a readonly repository */
5034 notes_cache_put(driver
->textconv_cache
, df
->sha1
, *outbuf
,
5037 * we could save up changes and flush them all at the end,
5038 * but we would need an extra call after all diffing is done.
5039 * Since generating a cache entry is the slow path anyway,
5040 * this extra overhead probably isn't a big deal.
5042 notes_cache_write(driver
->textconv_cache
);
5048 void setup_diff_pager(struct diff_options
*opt
)
5051 * If the user asked for our exit code, then either they want --quiet
5052 * or --exit-code. We should definitely not bother with a pager in the
5053 * former case, as we will generate no output. Since we still properly
5054 * report our exit code even when a pager is run, we _could_ run a
5055 * pager with --exit-code. But since we have not done so historically,
5056 * and because it is easy to find people oneline advising "git diff
5057 * --exit-code" in hooks and other scripts, we do not do so.
5059 if (!DIFF_OPT_TST(opt
, EXIT_WITH_STATUS
) &&
5060 check_pager_config("diff") != 0)