2 * Copyright (C) 2005 Junio C Hamano
9 #include "xdiff-interface.h"
12 #include "run-command.h"
16 #include "submodule.h"
19 #ifdef NO_FAST_WORKING_DIRECTORY
20 #define FAST_WORKING_DIRECTORY 0
22 #define FAST_WORKING_DIRECTORY 1
25 static int diff_detect_rename_default
;
26 static int diff_rename_limit_default
= 400;
27 static int diff_suppress_blank_empty
;
28 int diff_use_color_default
= -1;
29 static const char *diff_word_regex_cfg
;
30 static const char *external_diff_cmd_cfg
;
31 int diff_auto_refresh_index
= 1;
32 static int diff_mnemonic_prefix
;
33 static int diff_no_prefix
;
34 static int diff_dirstat_permille_default
= 30;
35 static struct diff_options default_diff_options
;
37 static char diff_colors
[][COLOR_MAXLEN
] = {
39 GIT_COLOR_NORMAL
, /* PLAIN */
40 GIT_COLOR_BOLD
, /* METAINFO */
41 GIT_COLOR_CYAN
, /* FRAGINFO */
42 GIT_COLOR_RED
, /* OLD */
43 GIT_COLOR_GREEN
, /* NEW */
44 GIT_COLOR_YELLOW
, /* COMMIT */
45 GIT_COLOR_BG_RED
, /* WHITESPACE */
46 GIT_COLOR_NORMAL
, /* FUNCINFO */
49 static int parse_diff_color_slot(const char *var
, int ofs
)
51 if (!strcasecmp(var
+ofs
, "plain"))
53 if (!strcasecmp(var
+ofs
, "meta"))
55 if (!strcasecmp(var
+ofs
, "frag"))
57 if (!strcasecmp(var
+ofs
, "old"))
59 if (!strcasecmp(var
+ofs
, "new"))
61 if (!strcasecmp(var
+ofs
, "commit"))
63 if (!strcasecmp(var
+ofs
, "whitespace"))
64 return DIFF_WHITESPACE
;
65 if (!strcasecmp(var
+ofs
, "func"))
70 static int parse_dirstat_params(struct diff_options
*options
, const char *params
,
71 struct strbuf
*errmsg
)
73 const char *p
= params
;
77 p_len
= strchrnul(p
, ',') - p
;
78 if (!memcmp(p
, "changes", p_len
)) {
79 DIFF_OPT_CLR(options
, DIRSTAT_BY_LINE
);
80 DIFF_OPT_CLR(options
, DIRSTAT_BY_FILE
);
81 } else if (!memcmp(p
, "lines", p_len
)) {
82 DIFF_OPT_SET(options
, DIRSTAT_BY_LINE
);
83 DIFF_OPT_CLR(options
, DIRSTAT_BY_FILE
);
84 } else if (!memcmp(p
, "files", p_len
)) {
85 DIFF_OPT_CLR(options
, DIRSTAT_BY_LINE
);
86 DIFF_OPT_SET(options
, DIRSTAT_BY_FILE
);
87 } else if (!memcmp(p
, "noncumulative", p_len
)) {
88 DIFF_OPT_CLR(options
, DIRSTAT_CUMULATIVE
);
89 } else if (!memcmp(p
, "cumulative", p_len
)) {
90 DIFF_OPT_SET(options
, DIRSTAT_CUMULATIVE
);
91 } else if (isdigit(*p
)) {
93 int permille
= strtoul(p
, &end
, 10) * 10;
94 if (*end
== '.' && isdigit(*++end
)) {
95 /* only use first digit */
96 permille
+= *end
- '0';
97 /* .. and ignore any further digits */
98 while (isdigit(*++end
))
101 if (end
- p
== p_len
)
102 options
->dirstat_permille
= permille
;
104 strbuf_addf(errmsg
, _(" Failed to parse dirstat cut-off percentage '%.*s'\n"),
109 strbuf_addf(errmsg
, _(" Unknown dirstat parameter '%.*s'\n"),
117 p
++; /* more parameters, swallow separator */
122 static int git_config_rename(const char *var
, const char *value
)
125 return DIFF_DETECT_RENAME
;
126 if (!strcasecmp(value
, "copies") || !strcasecmp(value
, "copy"))
127 return DIFF_DETECT_COPY
;
128 return git_config_bool(var
,value
) ? DIFF_DETECT_RENAME
: 0;
132 * These are to give UI layer defaults.
133 * The core-level commands such as git-diff-files should
134 * never be affected by the setting of diff.renames
135 * the user happens to have in the configuration file.
137 int git_diff_ui_config(const char *var
, const char *value
, void *cb
)
139 if (!strcmp(var
, "diff.color") || !strcmp(var
, "color.diff")) {
140 diff_use_color_default
= git_config_colorbool(var
, value
);
143 if (!strcmp(var
, "diff.renames")) {
144 diff_detect_rename_default
= git_config_rename(var
, value
);
147 if (!strcmp(var
, "diff.autorefreshindex")) {
148 diff_auto_refresh_index
= git_config_bool(var
, value
);
151 if (!strcmp(var
, "diff.mnemonicprefix")) {
152 diff_mnemonic_prefix
= git_config_bool(var
, value
);
155 if (!strcmp(var
, "diff.noprefix")) {
156 diff_no_prefix
= git_config_bool(var
, value
);
159 if (!strcmp(var
, "diff.external"))
160 return git_config_string(&external_diff_cmd_cfg
, var
, value
);
161 if (!strcmp(var
, "diff.wordregex"))
162 return git_config_string(&diff_word_regex_cfg
, var
, value
);
164 if (!strcmp(var
, "diff.ignoresubmodules"))
165 handle_ignore_submodules_arg(&default_diff_options
, value
);
167 if (git_color_config(var
, value
, cb
) < 0)
170 return git_diff_basic_config(var
, value
, cb
);
173 int git_diff_basic_config(const char *var
, const char *value
, void *cb
)
175 if (!strcmp(var
, "diff.renamelimit")) {
176 diff_rename_limit_default
= git_config_int(var
, value
);
180 switch (userdiff_config(var
, value
)) {
186 if (!prefixcmp(var
, "diff.color.") || !prefixcmp(var
, "color.diff.")) {
187 int slot
= parse_diff_color_slot(var
, 11);
191 return config_error_nonbool(var
);
192 color_parse(value
, var
, diff_colors
[slot
]);
196 /* like GNU diff's --suppress-blank-empty option */
197 if (!strcmp(var
, "diff.suppressblankempty") ||
198 /* for backwards compatibility */
199 !strcmp(var
, "diff.suppress-blank-empty")) {
200 diff_suppress_blank_empty
= git_config_bool(var
, value
);
204 if (!strcmp(var
, "diff.dirstat")) {
205 struct strbuf errmsg
= STRBUF_INIT
;
206 default_diff_options
.dirstat_permille
= diff_dirstat_permille_default
;
207 if (parse_dirstat_params(&default_diff_options
, value
, &errmsg
))
208 warning(_("Found errors in 'diff.dirstat' config variable:\n%s"),
210 strbuf_release(&errmsg
);
211 diff_dirstat_permille_default
= default_diff_options
.dirstat_permille
;
215 if (!prefixcmp(var
, "submodule."))
216 return parse_submodule_config_option(var
, value
);
218 return git_default_config(var
, value
, cb
);
221 static char *quote_two(const char *one
, const char *two
)
223 int need_one
= quote_c_style(one
, NULL
, NULL
, 1);
224 int need_two
= quote_c_style(two
, NULL
, NULL
, 1);
225 struct strbuf res
= STRBUF_INIT
;
227 if (need_one
+ need_two
) {
228 strbuf_addch(&res
, '"');
229 quote_c_style(one
, &res
, NULL
, 1);
230 quote_c_style(two
, &res
, NULL
, 1);
231 strbuf_addch(&res
, '"');
233 strbuf_addstr(&res
, one
);
234 strbuf_addstr(&res
, two
);
236 return strbuf_detach(&res
, NULL
);
239 static const char *external_diff(void)
241 static const char *external_diff_cmd
= NULL
;
242 static int done_preparing
= 0;
245 return external_diff_cmd
;
246 external_diff_cmd
= getenv("GIT_EXTERNAL_DIFF");
247 if (!external_diff_cmd
)
248 external_diff_cmd
= external_diff_cmd_cfg
;
250 return external_diff_cmd
;
253 static struct diff_tempfile
{
254 const char *name
; /* filename external diff should read from */
257 char tmp_path
[PATH_MAX
];
260 typedef unsigned long (*sane_truncate_fn
)(char *line
, unsigned long len
);
262 struct emit_callback
{
265 int blank_at_eof_in_preimage
;
266 int blank_at_eof_in_postimage
;
268 int lno_in_postimage
;
269 sane_truncate_fn truncate
;
270 const char **label_path
;
271 struct diff_words_data
*diff_words
;
272 struct diff_options
*opt
;
274 struct strbuf
*header
;
277 static int count_lines(const char *data
, int size
)
279 int count
, ch
, completely_empty
= 1, nl_just_seen
= 0;
286 completely_empty
= 0;
290 completely_empty
= 0;
293 if (completely_empty
)
296 count
++; /* no trailing newline */
300 static int fill_mmfile(mmfile_t
*mf
, struct diff_filespec
*one
)
302 if (!DIFF_FILE_VALID(one
)) {
303 mf
->ptr
= (char *)""; /* does not matter */
307 else if (diff_populate_filespec(one
, 0))
311 mf
->size
= one
->size
;
315 /* like fill_mmfile, but only for size, so we can avoid retrieving blob */
316 static unsigned long diff_filespec_size(struct diff_filespec
*one
)
318 if (!DIFF_FILE_VALID(one
))
320 diff_populate_filespec(one
, 1);
324 static int count_trailing_blank(mmfile_t
*mf
, unsigned ws_rule
)
327 long size
= mf
->size
;
332 ptr
+= size
- 1; /* pointing at the very end */
334 ; /* incomplete line */
336 ptr
--; /* skip the last LF */
337 while (mf
->ptr
< ptr
) {
339 for (prev_eol
= ptr
; mf
->ptr
<= prev_eol
; prev_eol
--)
340 if (*prev_eol
== '\n')
342 if (!ws_blank_line(prev_eol
+ 1, ptr
- prev_eol
, ws_rule
))
350 static void check_blank_at_eof(mmfile_t
*mf1
, mmfile_t
*mf2
,
351 struct emit_callback
*ecbdata
)
354 unsigned ws_rule
= ecbdata
->ws_rule
;
355 l1
= count_trailing_blank(mf1
, ws_rule
);
356 l2
= count_trailing_blank(mf2
, ws_rule
);
358 ecbdata
->blank_at_eof_in_preimage
= 0;
359 ecbdata
->blank_at_eof_in_postimage
= 0;
362 at
= count_lines(mf1
->ptr
, mf1
->size
);
363 ecbdata
->blank_at_eof_in_preimage
= (at
- l1
) + 1;
365 at
= count_lines(mf2
->ptr
, mf2
->size
);
366 ecbdata
->blank_at_eof_in_postimage
= (at
- l2
) + 1;
369 static void emit_line_0(struct diff_options
*o
, const char *set
, const char *reset
,
370 int first
, const char *line
, int len
)
372 int has_trailing_newline
, has_trailing_carriage_return
;
374 FILE *file
= o
->file
;
376 if (o
->output_prefix
) {
377 struct strbuf
*msg
= NULL
;
378 msg
= o
->output_prefix(o
, o
->output_prefix_data
);
380 fwrite(msg
->buf
, msg
->len
, 1, file
);
384 has_trailing_newline
= (first
== '\n');
385 has_trailing_carriage_return
= (!has_trailing_newline
&&
387 nofirst
= has_trailing_newline
|| has_trailing_carriage_return
;
389 has_trailing_newline
= (len
> 0 && line
[len
-1] == '\n');
390 if (has_trailing_newline
)
392 has_trailing_carriage_return
= (len
> 0 && line
[len
-1] == '\r');
393 if (has_trailing_carriage_return
)
398 if (len
|| !nofirst
) {
402 fwrite(line
, len
, 1, file
);
405 if (has_trailing_carriage_return
)
407 if (has_trailing_newline
)
411 static void emit_line(struct diff_options
*o
, const char *set
, const char *reset
,
412 const char *line
, int len
)
414 emit_line_0(o
, set
, reset
, line
[0], line
+1, len
-1);
417 static int new_blank_line_at_eof(struct emit_callback
*ecbdata
, const char *line
, int len
)
419 if (!((ecbdata
->ws_rule
& WS_BLANK_AT_EOF
) &&
420 ecbdata
->blank_at_eof_in_preimage
&&
421 ecbdata
->blank_at_eof_in_postimage
&&
422 ecbdata
->blank_at_eof_in_preimage
<= ecbdata
->lno_in_preimage
&&
423 ecbdata
->blank_at_eof_in_postimage
<= ecbdata
->lno_in_postimage
))
425 return ws_blank_line(line
, len
, ecbdata
->ws_rule
);
428 static void emit_add_line(const char *reset
,
429 struct emit_callback
*ecbdata
,
430 const char *line
, int len
)
432 const char *ws
= diff_get_color(ecbdata
->color_diff
, DIFF_WHITESPACE
);
433 const char *set
= diff_get_color(ecbdata
->color_diff
, DIFF_FILE_NEW
);
436 emit_line_0(ecbdata
->opt
, set
, reset
, '+', line
, len
);
437 else if (new_blank_line_at_eof(ecbdata
, line
, len
))
438 /* Blank line at EOF - paint '+' as well */
439 emit_line_0(ecbdata
->opt
, ws
, reset
, '+', line
, len
);
441 /* Emit just the prefix, then the rest. */
442 emit_line_0(ecbdata
->opt
, set
, reset
, '+', "", 0);
443 ws_check_emit(line
, len
, ecbdata
->ws_rule
,
444 ecbdata
->opt
->file
, set
, reset
, ws
);
448 static void emit_hunk_header(struct emit_callback
*ecbdata
,
449 const char *line
, int len
)
451 const char *plain
= diff_get_color(ecbdata
->color_diff
, DIFF_PLAIN
);
452 const char *frag
= diff_get_color(ecbdata
->color_diff
, DIFF_FRAGINFO
);
453 const char *func
= diff_get_color(ecbdata
->color_diff
, DIFF_FUNCINFO
);
454 const char *reset
= diff_get_color(ecbdata
->color_diff
, DIFF_RESET
);
455 static const char atat
[2] = { '@', '@' };
457 struct strbuf msgbuf
= STRBUF_INIT
;
462 * As a hunk header must begin with "@@ -<old>, +<new> @@",
463 * it always is at least 10 bytes long.
466 memcmp(line
, atat
, 2) ||
467 !(ep
= memmem(line
+ 2, len
- 2, atat
, 2))) {
468 emit_line(ecbdata
->opt
, plain
, reset
, line
, len
);
471 ep
+= 2; /* skip over @@ */
473 /* The hunk header in fraginfo color */
474 strbuf_add(&msgbuf
, frag
, strlen(frag
));
475 strbuf_add(&msgbuf
, line
, ep
- line
);
476 strbuf_add(&msgbuf
, reset
, strlen(reset
));
482 if (line
[len
- i
] == '\r' || line
[len
- i
] == '\n')
485 /* blank before the func header */
486 for (cp
= ep
; ep
- line
< len
; ep
++)
487 if (*ep
!= ' ' && *ep
!= '\t')
490 strbuf_add(&msgbuf
, plain
, strlen(plain
));
491 strbuf_add(&msgbuf
, cp
, ep
- cp
);
492 strbuf_add(&msgbuf
, reset
, strlen(reset
));
495 if (ep
< line
+ len
) {
496 strbuf_add(&msgbuf
, func
, strlen(func
));
497 strbuf_add(&msgbuf
, ep
, line
+ len
- ep
);
498 strbuf_add(&msgbuf
, reset
, strlen(reset
));
501 strbuf_add(&msgbuf
, line
+ len
, org_len
- len
);
502 emit_line(ecbdata
->opt
, "", "", msgbuf
.buf
, msgbuf
.len
);
503 strbuf_release(&msgbuf
);
506 static struct diff_tempfile
*claim_diff_tempfile(void) {
508 for (i
= 0; i
< ARRAY_SIZE(diff_temp
); i
++)
509 if (!diff_temp
[i
].name
)
510 return diff_temp
+ i
;
511 die("BUG: diff is failing to clean up its tempfiles");
514 static int remove_tempfile_installed
;
516 static void remove_tempfile(void)
519 for (i
= 0; i
< ARRAY_SIZE(diff_temp
); i
++) {
520 if (diff_temp
[i
].name
== diff_temp
[i
].tmp_path
)
521 unlink_or_warn(diff_temp
[i
].name
);
522 diff_temp
[i
].name
= NULL
;
526 static void remove_tempfile_on_signal(int signo
)
533 static void print_line_count(FILE *file
, int count
)
537 fprintf(file
, "0,0");
543 fprintf(file
, "1,%d", count
);
548 static void emit_rewrite_lines(struct emit_callback
*ecb
,
549 int prefix
, const char *data
, int size
)
551 const char *endp
= NULL
;
552 static const char *nneof
= " No newline at end of file\n";
553 const char *old
= diff_get_color(ecb
->color_diff
, DIFF_FILE_OLD
);
554 const char *reset
= diff_get_color(ecb
->color_diff
, DIFF_RESET
);
559 endp
= memchr(data
, '\n', size
);
560 len
= endp
? (endp
- data
+ 1) : size
;
562 ecb
->lno_in_preimage
++;
563 emit_line_0(ecb
->opt
, old
, reset
, '-',
566 ecb
->lno_in_postimage
++;
567 emit_add_line(reset
, ecb
, data
, len
);
573 const char *plain
= diff_get_color(ecb
->color_diff
,
575 emit_line_0(ecb
->opt
, plain
, reset
, '\\',
576 nneof
, strlen(nneof
));
580 static void emit_rewrite_diff(const char *name_a
,
582 struct diff_filespec
*one
,
583 struct diff_filespec
*two
,
584 struct userdiff_driver
*textconv_one
,
585 struct userdiff_driver
*textconv_two
,
586 struct diff_options
*o
)
589 const char *name_a_tab
, *name_b_tab
;
590 const char *metainfo
= diff_get_color(o
->use_color
, DIFF_METAINFO
);
591 const char *fraginfo
= diff_get_color(o
->use_color
, DIFF_FRAGINFO
);
592 const char *reset
= diff_get_color(o
->use_color
, DIFF_RESET
);
593 static struct strbuf a_name
= STRBUF_INIT
, b_name
= STRBUF_INIT
;
594 const char *a_prefix
, *b_prefix
;
595 char *data_one
, *data_two
;
596 size_t size_one
, size_two
;
597 struct emit_callback ecbdata
;
598 char *line_prefix
= "";
599 struct strbuf
*msgbuf
;
601 if (o
&& o
->output_prefix
) {
602 msgbuf
= o
->output_prefix(o
, o
->output_prefix_data
);
603 line_prefix
= msgbuf
->buf
;
606 if (diff_mnemonic_prefix
&& DIFF_OPT_TST(o
, REVERSE_DIFF
)) {
607 a_prefix
= o
->b_prefix
;
608 b_prefix
= o
->a_prefix
;
610 a_prefix
= o
->a_prefix
;
611 b_prefix
= o
->b_prefix
;
614 name_a
+= (*name_a
== '/');
615 name_b
+= (*name_b
== '/');
616 name_a_tab
= strchr(name_a
, ' ') ? "\t" : "";
617 name_b_tab
= strchr(name_b
, ' ') ? "\t" : "";
619 strbuf_reset(&a_name
);
620 strbuf_reset(&b_name
);
621 quote_two_c_style(&a_name
, a_prefix
, name_a
, 0);
622 quote_two_c_style(&b_name
, b_prefix
, name_b
, 0);
624 size_one
= fill_textconv(textconv_one
, one
, &data_one
);
625 size_two
= fill_textconv(textconv_two
, two
, &data_two
);
627 memset(&ecbdata
, 0, sizeof(ecbdata
));
628 ecbdata
.color_diff
= want_color(o
->use_color
);
629 ecbdata
.found_changesp
= &o
->found_changes
;
630 ecbdata
.ws_rule
= whitespace_rule(name_b
? name_b
: name_a
);
632 if (ecbdata
.ws_rule
& WS_BLANK_AT_EOF
) {
634 mf1
.ptr
= (char *)data_one
;
635 mf2
.ptr
= (char *)data_two
;
638 check_blank_at_eof(&mf1
, &mf2
, &ecbdata
);
640 ecbdata
.lno_in_preimage
= 1;
641 ecbdata
.lno_in_postimage
= 1;
643 lc_a
= count_lines(data_one
, size_one
);
644 lc_b
= count_lines(data_two
, size_two
);
646 "%s%s--- %s%s%s\n%s%s+++ %s%s%s\n%s%s@@ -",
647 line_prefix
, metainfo
, a_name
.buf
, name_a_tab
, reset
,
648 line_prefix
, metainfo
, b_name
.buf
, name_b_tab
, reset
,
649 line_prefix
, fraginfo
);
650 if (!o
->irreversible_delete
)
651 print_line_count(o
->file
, lc_a
);
653 fprintf(o
->file
, "?,?");
654 fprintf(o
->file
, " +");
655 print_line_count(o
->file
, lc_b
);
656 fprintf(o
->file
, " @@%s\n", reset
);
657 if (lc_a
&& !o
->irreversible_delete
)
658 emit_rewrite_lines(&ecbdata
, '-', data_one
, size_one
);
660 emit_rewrite_lines(&ecbdata
, '+', data_two
, size_two
);
662 free((char *)data_one
);
664 free((char *)data_two
);
667 struct diff_words_buffer
{
670 struct diff_words_orig
{
671 const char *begin
, *end
;
673 int orig_nr
, orig_alloc
;
676 static void diff_words_append(char *line
, unsigned long len
,
677 struct diff_words_buffer
*buffer
)
679 ALLOC_GROW(buffer
->text
.ptr
, buffer
->text
.size
+ len
, buffer
->alloc
);
682 memcpy(buffer
->text
.ptr
+ buffer
->text
.size
, line
, len
);
683 buffer
->text
.size
+= len
;
684 buffer
->text
.ptr
[buffer
->text
.size
] = '\0';
687 struct diff_words_style_elem
{
690 const char *color
; /* NULL; filled in by the setup code if
691 * color is enabled */
694 struct diff_words_style
{
695 enum diff_words_type type
;
696 struct diff_words_style_elem
new, old
, ctx
;
700 static struct diff_words_style diff_words_styles
[] = {
701 { DIFF_WORDS_PORCELAIN
, {"+", "\n"}, {"-", "\n"}, {" ", "\n"}, "~\n" },
702 { DIFF_WORDS_PLAIN
, {"{+", "+}"}, {"[-", "-]"}, {"", ""}, "\n" },
703 { DIFF_WORDS_COLOR
, {"", ""}, {"", ""}, {"", ""}, "\n" }
706 struct diff_words_data
{
707 struct diff_words_buffer minus
, plus
;
708 const char *current_plus
;
710 struct diff_options
*opt
;
712 enum diff_words_type type
;
713 struct diff_words_style
*style
;
716 static int fn_out_diff_words_write_helper(FILE *fp
,
717 struct diff_words_style_elem
*st_el
,
719 size_t count
, const char *buf
,
720 const char *line_prefix
)
725 char *p
= memchr(buf
, '\n', count
);
727 fputs(line_prefix
, fp
);
729 if (st_el
->color
&& fputs(st_el
->color
, fp
) < 0)
731 if (fputs(st_el
->prefix
, fp
) < 0 ||
732 fwrite(buf
, p
? p
- buf
: count
, 1, fp
) != 1 ||
733 fputs(st_el
->suffix
, fp
) < 0)
735 if (st_el
->color
&& *st_el
->color
736 && fputs(GIT_COLOR_RESET
, fp
) < 0)
741 if (fputs(newline
, fp
) < 0)
743 count
-= p
+ 1 - buf
;
751 * '--color-words' algorithm can be described as:
753 * 1. collect a the minus/plus lines of a diff hunk, divided into
754 * minus-lines and plus-lines;
756 * 2. break both minus-lines and plus-lines into words and
757 * place them into two mmfile_t with one word for each line;
759 * 3. use xdiff to run diff on the two mmfile_t to get the words level diff;
761 * And for the common parts of the both file, we output the plus side text.
762 * diff_words->current_plus is used to trace the current position of the plus file
763 * which printed. diff_words->last_minus is used to trace the last minus word
766 * For '--graph' to work with '--color-words', we need to output the graph prefix
767 * on each line of color words output. Generally, there are two conditions on
768 * which we should output the prefix.
770 * 1. diff_words->last_minus == 0 &&
771 * diff_words->current_plus == diff_words->plus.text.ptr
773 * that is: the plus text must start as a new line, and if there is no minus
774 * word printed, a graph prefix must be printed.
776 * 2. diff_words->current_plus > diff_words->plus.text.ptr &&
777 * *(diff_words->current_plus - 1) == '\n'
779 * that is: a graph prefix must be printed following a '\n'
781 static int color_words_output_graph_prefix(struct diff_words_data
*diff_words
)
783 if ((diff_words
->last_minus
== 0 &&
784 diff_words
->current_plus
== diff_words
->plus
.text
.ptr
) ||
785 (diff_words
->current_plus
> diff_words
->plus
.text
.ptr
&&
786 *(diff_words
->current_plus
- 1) == '\n')) {
793 static void fn_out_diff_words_aux(void *priv
, char *line
, unsigned long len
)
795 struct diff_words_data
*diff_words
= priv
;
796 struct diff_words_style
*style
= diff_words
->style
;
797 int minus_first
, minus_len
, plus_first
, plus_len
;
798 const char *minus_begin
, *minus_end
, *plus_begin
, *plus_end
;
799 struct diff_options
*opt
= diff_words
->opt
;
800 struct strbuf
*msgbuf
;
801 char *line_prefix
= "";
803 if (line
[0] != '@' || parse_hunk_header(line
, len
,
804 &minus_first
, &minus_len
, &plus_first
, &plus_len
))
808 if (opt
->output_prefix
) {
809 msgbuf
= opt
->output_prefix(opt
, opt
->output_prefix_data
);
810 line_prefix
= msgbuf
->buf
;
813 /* POSIX requires that first be decremented by one if len == 0... */
815 minus_begin
= diff_words
->minus
.orig
[minus_first
].begin
;
817 diff_words
->minus
.orig
[minus_first
+ minus_len
- 1].end
;
819 minus_begin
= minus_end
=
820 diff_words
->minus
.orig
[minus_first
].end
;
823 plus_begin
= diff_words
->plus
.orig
[plus_first
].begin
;
824 plus_end
= diff_words
->plus
.orig
[plus_first
+ plus_len
- 1].end
;
826 plus_begin
= plus_end
= diff_words
->plus
.orig
[plus_first
].end
;
828 if (color_words_output_graph_prefix(diff_words
)) {
829 fputs(line_prefix
, diff_words
->opt
->file
);
831 if (diff_words
->current_plus
!= plus_begin
) {
832 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
833 &style
->ctx
, style
->newline
,
834 plus_begin
- diff_words
->current_plus
,
835 diff_words
->current_plus
, line_prefix
);
836 if (*(plus_begin
- 1) == '\n')
837 fputs(line_prefix
, diff_words
->opt
->file
);
839 if (minus_begin
!= minus_end
) {
840 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
841 &style
->old
, style
->newline
,
842 minus_end
- minus_begin
, minus_begin
,
845 if (plus_begin
!= plus_end
) {
846 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
847 &style
->new, style
->newline
,
848 plus_end
- plus_begin
, plus_begin
,
852 diff_words
->current_plus
= plus_end
;
853 diff_words
->last_minus
= minus_first
;
856 /* This function starts looking at *begin, and returns 0 iff a word was found. */
857 static int find_word_boundaries(mmfile_t
*buffer
, regex_t
*word_regex
,
858 int *begin
, int *end
)
860 if (word_regex
&& *begin
< buffer
->size
) {
862 if (!regexec(word_regex
, buffer
->ptr
+ *begin
, 1, match
, 0)) {
863 char *p
= memchr(buffer
->ptr
+ *begin
+ match
[0].rm_so
,
864 '\n', match
[0].rm_eo
- match
[0].rm_so
);
865 *end
= p
? p
- buffer
->ptr
: match
[0].rm_eo
+ *begin
;
866 *begin
+= match
[0].rm_so
;
867 return *begin
>= *end
;
872 /* find the next word */
873 while (*begin
< buffer
->size
&& isspace(buffer
->ptr
[*begin
]))
875 if (*begin
>= buffer
->size
)
878 /* find the end of the word */
880 while (*end
< buffer
->size
&& !isspace(buffer
->ptr
[*end
]))
887 * This function splits the words in buffer->text, stores the list with
888 * newline separator into out, and saves the offsets of the original words
891 static void diff_words_fill(struct diff_words_buffer
*buffer
, mmfile_t
*out
,
900 /* fake an empty "0th" word */
901 ALLOC_GROW(buffer
->orig
, 1, buffer
->orig_alloc
);
902 buffer
->orig
[0].begin
= buffer
->orig
[0].end
= buffer
->text
.ptr
;
905 for (i
= 0; i
< buffer
->text
.size
; i
++) {
906 if (find_word_boundaries(&buffer
->text
, word_regex
, &i
, &j
))
909 /* store original boundaries */
910 ALLOC_GROW(buffer
->orig
, buffer
->orig_nr
+ 1,
912 buffer
->orig
[buffer
->orig_nr
].begin
= buffer
->text
.ptr
+ i
;
913 buffer
->orig
[buffer
->orig_nr
].end
= buffer
->text
.ptr
+ j
;
917 ALLOC_GROW(out
->ptr
, out
->size
+ j
- i
+ 1, alloc
);
918 memcpy(out
->ptr
+ out
->size
, buffer
->text
.ptr
+ i
, j
- i
);
919 out
->ptr
[out
->size
+ j
- i
] = '\n';
920 out
->size
+= j
- i
+ 1;
926 /* this executes the word diff on the accumulated buffers */
927 static void diff_words_show(struct diff_words_data
*diff_words
)
931 mmfile_t minus
, plus
;
932 struct diff_words_style
*style
= diff_words
->style
;
934 struct diff_options
*opt
= diff_words
->opt
;
935 struct strbuf
*msgbuf
;
936 char *line_prefix
= "";
939 if (opt
->output_prefix
) {
940 msgbuf
= opt
->output_prefix(opt
, opt
->output_prefix_data
);
941 line_prefix
= msgbuf
->buf
;
944 /* special case: only removal */
945 if (!diff_words
->plus
.text
.size
) {
946 fputs(line_prefix
, diff_words
->opt
->file
);
947 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
948 &style
->old
, style
->newline
,
949 diff_words
->minus
.text
.size
,
950 diff_words
->minus
.text
.ptr
, line_prefix
);
951 diff_words
->minus
.text
.size
= 0;
955 diff_words
->current_plus
= diff_words
->plus
.text
.ptr
;
956 diff_words
->last_minus
= 0;
958 memset(&xpp
, 0, sizeof(xpp
));
959 memset(&xecfg
, 0, sizeof(xecfg
));
960 diff_words_fill(&diff_words
->minus
, &minus
, diff_words
->word_regex
);
961 diff_words_fill(&diff_words
->plus
, &plus
, diff_words
->word_regex
);
963 /* as only the hunk header will be parsed, we need a 0-context */
965 xdi_diff_outf(&minus
, &plus
, fn_out_diff_words_aux
, diff_words
,
969 if (diff_words
->current_plus
!= diff_words
->plus
.text
.ptr
+
970 diff_words
->plus
.text
.size
) {
971 if (color_words_output_graph_prefix(diff_words
))
972 fputs(line_prefix
, diff_words
->opt
->file
);
973 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
974 &style
->ctx
, style
->newline
,
975 diff_words
->plus
.text
.ptr
+ diff_words
->plus
.text
.size
976 - diff_words
->current_plus
, diff_words
->current_plus
,
979 diff_words
->minus
.text
.size
= diff_words
->plus
.text
.size
= 0;
982 /* In "color-words" mode, show word-diff of words accumulated in the buffer */
983 static void diff_words_flush(struct emit_callback
*ecbdata
)
985 if (ecbdata
->diff_words
->minus
.text
.size
||
986 ecbdata
->diff_words
->plus
.text
.size
)
987 diff_words_show(ecbdata
->diff_words
);
990 static void diff_filespec_load_driver(struct diff_filespec
*one
)
992 /* Use already-loaded driver */
996 if (S_ISREG(one
->mode
))
997 one
->driver
= userdiff_find_by_path(one
->path
);
999 /* Fallback to default settings */
1001 one
->driver
= userdiff_find_by_name("default");
1004 static const char *userdiff_word_regex(struct diff_filespec
*one
)
1006 diff_filespec_load_driver(one
);
1007 return one
->driver
->word_regex
;
1010 static void init_diff_words_data(struct emit_callback
*ecbdata
,
1011 struct diff_options
*o
,
1012 struct diff_filespec
*one
,
1013 struct diff_filespec
*two
)
1017 ecbdata
->diff_words
=
1018 xcalloc(1, sizeof(struct diff_words_data
));
1019 ecbdata
->diff_words
->type
= o
->word_diff
;
1020 ecbdata
->diff_words
->opt
= o
;
1022 o
->word_regex
= userdiff_word_regex(one
);
1024 o
->word_regex
= userdiff_word_regex(two
);
1026 o
->word_regex
= diff_word_regex_cfg
;
1027 if (o
->word_regex
) {
1028 ecbdata
->diff_words
->word_regex
= (regex_t
*)
1029 xmalloc(sizeof(regex_t
));
1030 if (regcomp(ecbdata
->diff_words
->word_regex
,
1032 REG_EXTENDED
| REG_NEWLINE
))
1033 die ("Invalid regular expression: %s",
1036 for (i
= 0; i
< ARRAY_SIZE(diff_words_styles
); i
++) {
1037 if (o
->word_diff
== diff_words_styles
[i
].type
) {
1038 ecbdata
->diff_words
->style
=
1039 &diff_words_styles
[i
];
1043 if (want_color(o
->use_color
)) {
1044 struct diff_words_style
*st
= ecbdata
->diff_words
->style
;
1045 st
->old
.color
= diff_get_color_opt(o
, DIFF_FILE_OLD
);
1046 st
->new.color
= diff_get_color_opt(o
, DIFF_FILE_NEW
);
1047 st
->ctx
.color
= diff_get_color_opt(o
, DIFF_PLAIN
);
1051 static void free_diff_words_data(struct emit_callback
*ecbdata
)
1053 if (ecbdata
->diff_words
) {
1054 diff_words_flush(ecbdata
);
1055 free (ecbdata
->diff_words
->minus
.text
.ptr
);
1056 free (ecbdata
->diff_words
->minus
.orig
);
1057 free (ecbdata
->diff_words
->plus
.text
.ptr
);
1058 free (ecbdata
->diff_words
->plus
.orig
);
1059 if (ecbdata
->diff_words
->word_regex
) {
1060 regfree(ecbdata
->diff_words
->word_regex
);
1061 free(ecbdata
->diff_words
->word_regex
);
1063 free(ecbdata
->diff_words
);
1064 ecbdata
->diff_words
= NULL
;
1068 const char *diff_get_color(int diff_use_color
, enum color_diff ix
)
1070 if (want_color(diff_use_color
))
1071 return diff_colors
[ix
];
1075 static unsigned long sane_truncate_line(struct emit_callback
*ecb
, char *line
, unsigned long len
)
1078 unsigned long allot
;
1082 return ecb
->truncate(line
, len
);
1086 (void) utf8_width(&cp
, &l
);
1088 break; /* truncated in the middle? */
1093 static void find_lno(const char *line
, struct emit_callback
*ecbdata
)
1096 ecbdata
->lno_in_preimage
= 0;
1097 ecbdata
->lno_in_postimage
= 0;
1098 p
= strchr(line
, '-');
1100 return; /* cannot happen */
1101 ecbdata
->lno_in_preimage
= strtol(p
+ 1, NULL
, 10);
1104 return; /* cannot happen */
1105 ecbdata
->lno_in_postimage
= strtol(p
+ 1, NULL
, 10);
1108 static void fn_out_consume(void *priv
, char *line
, unsigned long len
)
1110 struct emit_callback
*ecbdata
= priv
;
1111 const char *meta
= diff_get_color(ecbdata
->color_diff
, DIFF_METAINFO
);
1112 const char *plain
= diff_get_color(ecbdata
->color_diff
, DIFF_PLAIN
);
1113 const char *reset
= diff_get_color(ecbdata
->color_diff
, DIFF_RESET
);
1114 struct diff_options
*o
= ecbdata
->opt
;
1115 char *line_prefix
= "";
1116 struct strbuf
*msgbuf
;
1118 if (o
&& o
->output_prefix
) {
1119 msgbuf
= o
->output_prefix(o
, o
->output_prefix_data
);
1120 line_prefix
= msgbuf
->buf
;
1123 if (ecbdata
->header
) {
1124 fprintf(ecbdata
->opt
->file
, "%s", ecbdata
->header
->buf
);
1125 strbuf_reset(ecbdata
->header
);
1126 ecbdata
->header
= NULL
;
1128 *(ecbdata
->found_changesp
) = 1;
1130 if (ecbdata
->label_path
[0]) {
1131 const char *name_a_tab
, *name_b_tab
;
1133 name_a_tab
= strchr(ecbdata
->label_path
[0], ' ') ? "\t" : "";
1134 name_b_tab
= strchr(ecbdata
->label_path
[1], ' ') ? "\t" : "";
1136 fprintf(ecbdata
->opt
->file
, "%s%s--- %s%s%s\n",
1137 line_prefix
, meta
, ecbdata
->label_path
[0], reset
, name_a_tab
);
1138 fprintf(ecbdata
->opt
->file
, "%s%s+++ %s%s%s\n",
1139 line_prefix
, meta
, ecbdata
->label_path
[1], reset
, name_b_tab
);
1140 ecbdata
->label_path
[0] = ecbdata
->label_path
[1] = NULL
;
1143 if (diff_suppress_blank_empty
1144 && len
== 2 && line
[0] == ' ' && line
[1] == '\n') {
1149 if (line
[0] == '@') {
1150 if (ecbdata
->diff_words
)
1151 diff_words_flush(ecbdata
);
1152 len
= sane_truncate_line(ecbdata
, line
, len
);
1153 find_lno(line
, ecbdata
);
1154 emit_hunk_header(ecbdata
, line
, len
);
1155 if (line
[len
-1] != '\n')
1156 putc('\n', ecbdata
->opt
->file
);
1161 emit_line(ecbdata
->opt
, reset
, reset
, line
, len
);
1162 if (ecbdata
->diff_words
1163 && ecbdata
->diff_words
->type
== DIFF_WORDS_PORCELAIN
)
1164 fputs("~\n", ecbdata
->opt
->file
);
1168 if (ecbdata
->diff_words
) {
1169 if (line
[0] == '-') {
1170 diff_words_append(line
, len
,
1171 &ecbdata
->diff_words
->minus
);
1173 } else if (line
[0] == '+') {
1174 diff_words_append(line
, len
,
1175 &ecbdata
->diff_words
->plus
);
1177 } else if (!prefixcmp(line
, "\\ ")) {
1179 * Eat the "no newline at eof" marker as if we
1180 * saw a "+" or "-" line with nothing on it,
1181 * and return without diff_words_flush() to
1182 * defer processing. If this is the end of
1183 * preimage, more "+" lines may come after it.
1187 diff_words_flush(ecbdata
);
1188 if (ecbdata
->diff_words
->type
== DIFF_WORDS_PORCELAIN
) {
1189 emit_line(ecbdata
->opt
, plain
, reset
, line
, len
);
1190 fputs("~\n", ecbdata
->opt
->file
);
1193 * Skip the prefix character, if any. With
1194 * diff_suppress_blank_empty, there may be
1197 if (line
[0] != '\n') {
1201 emit_line(ecbdata
->opt
, plain
, reset
, line
, len
);
1206 if (line
[0] != '+') {
1208 diff_get_color(ecbdata
->color_diff
,
1209 line
[0] == '-' ? DIFF_FILE_OLD
: DIFF_PLAIN
);
1210 ecbdata
->lno_in_preimage
++;
1212 ecbdata
->lno_in_postimage
++;
1213 emit_line(ecbdata
->opt
, color
, reset
, line
, len
);
1215 ecbdata
->lno_in_postimage
++;
1216 emit_add_line(reset
, ecbdata
, line
+ 1, len
- 1);
1220 static char *pprint_rename(const char *a
, const char *b
)
1222 const char *old
= a
;
1223 const char *new = b
;
1224 struct strbuf name
= STRBUF_INIT
;
1225 int pfx_length
, sfx_length
;
1226 int len_a
= strlen(a
);
1227 int len_b
= strlen(b
);
1228 int a_midlen
, b_midlen
;
1229 int qlen_a
= quote_c_style(a
, NULL
, NULL
, 0);
1230 int qlen_b
= quote_c_style(b
, NULL
, NULL
, 0);
1232 if (qlen_a
|| qlen_b
) {
1233 quote_c_style(a
, &name
, NULL
, 0);
1234 strbuf_addstr(&name
, " => ");
1235 quote_c_style(b
, &name
, NULL
, 0);
1236 return strbuf_detach(&name
, NULL
);
1239 /* Find common prefix */
1241 while (*old
&& *new && *old
== *new) {
1243 pfx_length
= old
- a
+ 1;
1248 /* Find common suffix */
1252 while (a
<= old
&& b
<= new && *old
== *new) {
1254 sfx_length
= len_a
- (old
- a
);
1260 * pfx{mid-a => mid-b}sfx
1261 * {pfx-a => pfx-b}sfx
1262 * pfx{sfx-a => sfx-b}
1265 a_midlen
= len_a
- pfx_length
- sfx_length
;
1266 b_midlen
= len_b
- pfx_length
- sfx_length
;
1272 strbuf_grow(&name
, pfx_length
+ a_midlen
+ b_midlen
+ sfx_length
+ 7);
1273 if (pfx_length
+ sfx_length
) {
1274 strbuf_add(&name
, a
, pfx_length
);
1275 strbuf_addch(&name
, '{');
1277 strbuf_add(&name
, a
+ pfx_length
, a_midlen
);
1278 strbuf_addstr(&name
, " => ");
1279 strbuf_add(&name
, b
+ pfx_length
, b_midlen
);
1280 if (pfx_length
+ sfx_length
) {
1281 strbuf_addch(&name
, '}');
1282 strbuf_add(&name
, a
+ len_a
- sfx_length
, sfx_length
);
1284 return strbuf_detach(&name
, NULL
);
1290 struct diffstat_file
{
1294 unsigned is_unmerged
:1;
1295 unsigned is_binary
:1;
1296 unsigned is_renamed
:1;
1297 uintmax_t added
, deleted
;
1301 static struct diffstat_file
*diffstat_add(struct diffstat_t
*diffstat
,
1305 struct diffstat_file
*x
;
1306 x
= xcalloc(sizeof (*x
), 1);
1307 if (diffstat
->nr
== diffstat
->alloc
) {
1308 diffstat
->alloc
= alloc_nr(diffstat
->alloc
);
1309 diffstat
->files
= xrealloc(diffstat
->files
,
1310 diffstat
->alloc
* sizeof(x
));
1312 diffstat
->files
[diffstat
->nr
++] = x
;
1314 x
->from_name
= xstrdup(name_a
);
1315 x
->name
= xstrdup(name_b
);
1319 x
->from_name
= NULL
;
1320 x
->name
= xstrdup(name_a
);
1325 static void diffstat_consume(void *priv
, char *line
, unsigned long len
)
1327 struct diffstat_t
*diffstat
= priv
;
1328 struct diffstat_file
*x
= diffstat
->files
[diffstat
->nr
- 1];
1332 else if (line
[0] == '-')
1336 const char mime_boundary_leader
[] = "------------";
1338 static int scale_linear(int it
, int width
, int max_change
)
1343 * make sure that at least one '-' or '+' is printed if
1344 * there is any change to this path. The easiest way is to
1345 * scale linearly as if the alloted width is one column shorter
1346 * than it is, and then add 1 to the result.
1348 return 1 + (it
* (width
- 1) / max_change
);
1351 static void show_name(FILE *file
,
1352 const char *prefix
, const char *name
, int len
)
1354 fprintf(file
, " %s%-*s |", prefix
, len
, name
);
1357 static void show_graph(FILE *file
, char ch
, int cnt
, const char *set
, const char *reset
)
1361 fprintf(file
, "%s", set
);
1364 fprintf(file
, "%s", reset
);
1367 static void fill_print_name(struct diffstat_file
*file
)
1371 if (file
->print_name
)
1374 if (!file
->is_renamed
) {
1375 struct strbuf buf
= STRBUF_INIT
;
1376 if (quote_c_style(file
->name
, &buf
, NULL
, 0)) {
1377 pname
= strbuf_detach(&buf
, NULL
);
1380 strbuf_release(&buf
);
1383 pname
= pprint_rename(file
->from_name
, file
->name
);
1385 file
->print_name
= pname
;
1388 int print_stat_summary(FILE *fp
, int files
, int insertions
, int deletions
)
1390 struct strbuf sb
= STRBUF_INIT
;
1394 assert(insertions
== 0 && deletions
== 0);
1395 return fputs(_(" 0 files changed\n"), fp
);
1399 Q_(" %d file changed", " %d files changed", files
),
1403 * For binary diff, the caller may want to print "x files
1404 * changed" with insertions == 0 && deletions == 0.
1406 * Not omitting "0 insertions(+), 0 deletions(-)" in this case
1407 * is probably less confusing (i.e skip over "2 files changed
1408 * but nothing about added/removed lines? Is this a bug in Git?").
1410 if (insertions
|| deletions
== 0) {
1412 * TRANSLATORS: "+" in (+) is a line addition marker;
1413 * do not translate it.
1416 Q_(", %d insertion(+)", ", %d insertions(+)",
1421 if (deletions
|| insertions
== 0) {
1423 * TRANSLATORS: "-" in (-) is a line removal marker;
1424 * do not translate it.
1427 Q_(", %d deletion(-)", ", %d deletions(-)",
1431 strbuf_addch(&sb
, '\n');
1432 ret
= fputs(sb
.buf
, fp
);
1433 strbuf_release(&sb
);
1437 static void show_stats(struct diffstat_t
*data
, struct diff_options
*options
)
1439 int i
, len
, add
, del
, adds
= 0, dels
= 0;
1440 uintmax_t max_change
= 0, max_len
= 0;
1441 int total_files
= data
->nr
;
1442 int width
, name_width
, count
;
1443 const char *reset
, *add_c
, *del_c
;
1444 const char *line_prefix
= "";
1445 int extra_shown
= 0;
1446 struct strbuf
*msg
= NULL
;
1451 if (options
->output_prefix
) {
1452 msg
= options
->output_prefix(options
, options
->output_prefix_data
);
1453 line_prefix
= msg
->buf
;
1456 width
= options
->stat_width
? options
->stat_width
: 80;
1457 name_width
= options
->stat_name_width
? options
->stat_name_width
: 50;
1458 count
= options
->stat_count
? options
->stat_count
: data
->nr
;
1460 /* Sanity: give at least 5 columns to the graph,
1461 * but leave at least 10 columns for the name.
1465 if (name_width
< 10)
1467 else if (width
< name_width
+ 15)
1468 name_width
= width
- 15;
1470 /* Find the longest filename and max number of changes */
1471 reset
= diff_get_color_opt(options
, DIFF_RESET
);
1472 add_c
= diff_get_color_opt(options
, DIFF_FILE_NEW
);
1473 del_c
= diff_get_color_opt(options
, DIFF_FILE_OLD
);
1475 for (i
= 0; (i
< count
) && (i
< data
->nr
); i
++) {
1476 struct diffstat_file
*file
= data
->files
[i
];
1477 uintmax_t change
= file
->added
+ file
->deleted
;
1478 if (!data
->files
[i
]->is_renamed
&&
1480 count
++; /* not shown == room for one more */
1483 fill_print_name(file
);
1484 len
= strlen(file
->print_name
);
1488 if (file
->is_binary
|| file
->is_unmerged
)
1490 if (max_change
< change
)
1491 max_change
= change
;
1493 count
= i
; /* min(count, data->nr) */
1495 /* Compute the width of the graph part;
1496 * 10 is for one blank at the beginning of the line plus
1497 * " | count " between the name and the graph.
1499 * From here on, name_width is the width of the name area,
1500 * and width is the width of the graph area.
1502 name_width
= (name_width
< max_len
) ? name_width
: max_len
;
1503 if (width
< (name_width
+ 10) + max_change
)
1504 width
= width
- (name_width
+ 10);
1508 for (i
= 0; i
< count
; i
++) {
1509 const char *prefix
= "";
1510 char *name
= data
->files
[i
]->print_name
;
1511 uintmax_t added
= data
->files
[i
]->added
;
1512 uintmax_t deleted
= data
->files
[i
]->deleted
;
1515 if (!data
->files
[i
]->is_renamed
&&
1516 (added
+ deleted
== 0)) {
1521 * "scale" the filename
1524 name_len
= strlen(name
);
1525 if (name_width
< name_len
) {
1529 name
+= name_len
- len
;
1530 slash
= strchr(name
, '/');
1535 if (data
->files
[i
]->is_binary
) {
1536 fprintf(options
->file
, "%s", line_prefix
);
1537 show_name(options
->file
, prefix
, name
, len
);
1538 fprintf(options
->file
, " Bin ");
1539 fprintf(options
->file
, "%s%"PRIuMAX
"%s",
1540 del_c
, deleted
, reset
);
1541 fprintf(options
->file
, " -> ");
1542 fprintf(options
->file
, "%s%"PRIuMAX
"%s",
1543 add_c
, added
, reset
);
1544 fprintf(options
->file
, " bytes");
1545 fprintf(options
->file
, "\n");
1548 else if (data
->files
[i
]->is_unmerged
) {
1549 fprintf(options
->file
, "%s", line_prefix
);
1550 show_name(options
->file
, prefix
, name
, len
);
1551 fprintf(options
->file
, " Unmerged\n");
1556 * scale the add/delete
1563 if (width
<= max_change
) {
1564 int total
= add
+ del
;
1566 total
= scale_linear(add
+ del
, width
, max_change
);
1567 if (total
< 2 && add
&& del
)
1568 /* width >= 2 due to the sanity check */
1571 add
= scale_linear(add
, width
, max_change
);
1574 del
= scale_linear(del
, width
, max_change
);
1578 fprintf(options
->file
, "%s", line_prefix
);
1579 show_name(options
->file
, prefix
, name
, len
);
1580 fprintf(options
->file
, "%5"PRIuMAX
"%s", added
+ deleted
,
1581 added
+ deleted
? " " : "");
1582 show_graph(options
->file
, '+', add
, add_c
, reset
);
1583 show_graph(options
->file
, '-', del
, del_c
, reset
);
1584 fprintf(options
->file
, "\n");
1586 for (i
= count
; i
< data
->nr
; i
++) {
1587 uintmax_t added
= data
->files
[i
]->added
;
1588 uintmax_t deleted
= data
->files
[i
]->deleted
;
1589 if (!data
->files
[i
]->is_renamed
&&
1590 (added
+ deleted
== 0)) {
1597 fprintf(options
->file
, "%s ...\n", line_prefix
);
1600 fprintf(options
->file
, "%s", line_prefix
);
1601 print_stat_summary(options
->file
, total_files
, adds
, dels
);
1604 static void show_shortstats(struct diffstat_t
*data
, struct diff_options
*options
)
1606 int i
, adds
= 0, dels
= 0, total_files
= data
->nr
;
1611 for (i
= 0; i
< data
->nr
; i
++) {
1612 if (!data
->files
[i
]->is_binary
&&
1613 !data
->files
[i
]->is_unmerged
) {
1614 int added
= data
->files
[i
]->added
;
1615 int deleted
= data
->files
[i
]->deleted
;
1616 if (!data
->files
[i
]->is_renamed
&&
1617 (added
+ deleted
== 0)) {
1625 if (options
->output_prefix
) {
1626 struct strbuf
*msg
= NULL
;
1627 msg
= options
->output_prefix(options
,
1628 options
->output_prefix_data
);
1629 fprintf(options
->file
, "%s", msg
->buf
);
1631 print_stat_summary(options
->file
, total_files
, adds
, dels
);
1634 static void show_numstat(struct diffstat_t
*data
, struct diff_options
*options
)
1641 for (i
= 0; i
< data
->nr
; i
++) {
1642 struct diffstat_file
*file
= data
->files
[i
];
1644 if (options
->output_prefix
) {
1645 struct strbuf
*msg
= NULL
;
1646 msg
= options
->output_prefix(options
,
1647 options
->output_prefix_data
);
1648 fprintf(options
->file
, "%s", msg
->buf
);
1651 if (file
->is_binary
)
1652 fprintf(options
->file
, "-\t-\t");
1654 fprintf(options
->file
,
1655 "%"PRIuMAX
"\t%"PRIuMAX
"\t",
1656 file
->added
, file
->deleted
);
1657 if (options
->line_termination
) {
1658 fill_print_name(file
);
1659 if (!file
->is_renamed
)
1660 write_name_quoted(file
->name
, options
->file
,
1661 options
->line_termination
);
1663 fputs(file
->print_name
, options
->file
);
1664 putc(options
->line_termination
, options
->file
);
1667 if (file
->is_renamed
) {
1668 putc('\0', options
->file
);
1669 write_name_quoted(file
->from_name
, options
->file
, '\0');
1671 write_name_quoted(file
->name
, options
->file
, '\0');
1676 struct dirstat_file
{
1678 unsigned long changed
;
1681 struct dirstat_dir
{
1682 struct dirstat_file
*files
;
1683 int alloc
, nr
, permille
, cumulative
;
1686 static long gather_dirstat(struct diff_options
*opt
, struct dirstat_dir
*dir
,
1687 unsigned long changed
, const char *base
, int baselen
)
1689 unsigned long this_dir
= 0;
1690 unsigned int sources
= 0;
1691 const char *line_prefix
= "";
1692 struct strbuf
*msg
= NULL
;
1694 if (opt
->output_prefix
) {
1695 msg
= opt
->output_prefix(opt
, opt
->output_prefix_data
);
1696 line_prefix
= msg
->buf
;
1700 struct dirstat_file
*f
= dir
->files
;
1701 int namelen
= strlen(f
->name
);
1705 if (namelen
< baselen
)
1707 if (memcmp(f
->name
, base
, baselen
))
1709 slash
= strchr(f
->name
+ baselen
, '/');
1711 int newbaselen
= slash
+ 1 - f
->name
;
1712 this = gather_dirstat(opt
, dir
, changed
, f
->name
, newbaselen
);
1724 * We don't report dirstat's for
1726 * - or cases where everything came from a single directory
1727 * under this directory (sources == 1).
1729 if (baselen
&& sources
!= 1) {
1731 int permille
= this_dir
* 1000 / changed
;
1732 if (permille
>= dir
->permille
) {
1733 fprintf(opt
->file
, "%s%4d.%01d%% %.*s\n", line_prefix
,
1734 permille
/ 10, permille
% 10, baselen
, base
);
1735 if (!dir
->cumulative
)
1743 static int dirstat_compare(const void *_a
, const void *_b
)
1745 const struct dirstat_file
*a
= _a
;
1746 const struct dirstat_file
*b
= _b
;
1747 return strcmp(a
->name
, b
->name
);
1750 static void show_dirstat(struct diff_options
*options
)
1753 unsigned long changed
;
1754 struct dirstat_dir dir
;
1755 struct diff_queue_struct
*q
= &diff_queued_diff
;
1760 dir
.permille
= options
->dirstat_permille
;
1761 dir
.cumulative
= DIFF_OPT_TST(options
, DIRSTAT_CUMULATIVE
);
1764 for (i
= 0; i
< q
->nr
; i
++) {
1765 struct diff_filepair
*p
= q
->queue
[i
];
1767 unsigned long copied
, added
, damage
;
1768 int content_changed
;
1770 name
= p
->two
->path
? p
->two
->path
: p
->one
->path
;
1772 if (p
->one
->sha1_valid
&& p
->two
->sha1_valid
)
1773 content_changed
= hashcmp(p
->one
->sha1
, p
->two
->sha1
);
1775 content_changed
= 1;
1777 if (!content_changed
) {
1779 * The SHA1 has not changed, so pre-/post-content is
1780 * identical. We can therefore skip looking at the
1781 * file contents altogether.
1787 if (DIFF_OPT_TST(options
, DIRSTAT_BY_FILE
)) {
1789 * In --dirstat-by-file mode, we don't really need to
1790 * look at the actual file contents at all.
1791 * The fact that the SHA1 changed is enough for us to
1792 * add this file to the list of results
1793 * (with each file contributing equal damage).
1799 if (DIFF_FILE_VALID(p
->one
) && DIFF_FILE_VALID(p
->two
)) {
1800 diff_populate_filespec(p
->one
, 0);
1801 diff_populate_filespec(p
->two
, 0);
1802 diffcore_count_changes(p
->one
, p
->two
, NULL
, NULL
, 0,
1804 diff_free_filespec_data(p
->one
);
1805 diff_free_filespec_data(p
->two
);
1806 } else if (DIFF_FILE_VALID(p
->one
)) {
1807 diff_populate_filespec(p
->one
, 1);
1809 diff_free_filespec_data(p
->one
);
1810 } else if (DIFF_FILE_VALID(p
->two
)) {
1811 diff_populate_filespec(p
->two
, 1);
1813 added
= p
->two
->size
;
1814 diff_free_filespec_data(p
->two
);
1819 * Original minus copied is the removed material,
1820 * added is the new material. They are both damages
1821 * made to the preimage.
1822 * If the resulting damage is zero, we know that
1823 * diffcore_count_changes() considers the two entries to
1824 * be identical, but since content_changed is true, we
1825 * know that there must have been _some_ kind of change,
1826 * so we force all entries to have damage > 0.
1828 damage
= (p
->one
->size
- copied
) + added
;
1833 ALLOC_GROW(dir
.files
, dir
.nr
+ 1, dir
.alloc
);
1834 dir
.files
[dir
.nr
].name
= name
;
1835 dir
.files
[dir
.nr
].changed
= damage
;
1840 /* This can happen even with many files, if everything was renames */
1844 /* Show all directories with more than x% of the changes */
1845 qsort(dir
.files
, dir
.nr
, sizeof(dir
.files
[0]), dirstat_compare
);
1846 gather_dirstat(options
, &dir
, changed
, "", 0);
1849 static void show_dirstat_by_line(struct diffstat_t
*data
, struct diff_options
*options
)
1852 unsigned long changed
;
1853 struct dirstat_dir dir
;
1861 dir
.permille
= options
->dirstat_permille
;
1862 dir
.cumulative
= DIFF_OPT_TST(options
, DIRSTAT_CUMULATIVE
);
1865 for (i
= 0; i
< data
->nr
; i
++) {
1866 struct diffstat_file
*file
= data
->files
[i
];
1867 unsigned long damage
= file
->added
+ file
->deleted
;
1868 if (file
->is_binary
)
1870 * binary files counts bytes, not lines. Must find some
1871 * way to normalize binary bytes vs. textual lines.
1872 * The following heuristic assumes that there are 64
1874 * This is stupid and ugly, but very cheap...
1876 damage
= (damage
+ 63) / 64;
1877 ALLOC_GROW(dir
.files
, dir
.nr
+ 1, dir
.alloc
);
1878 dir
.files
[dir
.nr
].name
= file
->name
;
1879 dir
.files
[dir
.nr
].changed
= damage
;
1884 /* This can happen even with many files, if everything was renames */
1888 /* Show all directories with more than x% of the changes */
1889 qsort(dir
.files
, dir
.nr
, sizeof(dir
.files
[0]), dirstat_compare
);
1890 gather_dirstat(options
, &dir
, changed
, "", 0);
1893 static void free_diffstat_info(struct diffstat_t
*diffstat
)
1896 for (i
= 0; i
< diffstat
->nr
; i
++) {
1897 struct diffstat_file
*f
= diffstat
->files
[i
];
1898 if (f
->name
!= f
->print_name
)
1899 free(f
->print_name
);
1904 free(diffstat
->files
);
1907 struct checkdiff_t
{
1908 const char *filename
;
1910 int conflict_marker_size
;
1911 struct diff_options
*o
;
1916 static int is_conflict_marker(const char *line
, int marker_size
, unsigned long len
)
1921 if (len
< marker_size
+ 1)
1923 firstchar
= line
[0];
1924 switch (firstchar
) {
1925 case '=': case '>': case '<': case '|':
1930 for (cnt
= 1; cnt
< marker_size
; cnt
++)
1931 if (line
[cnt
] != firstchar
)
1933 /* line[1] thru line[marker_size-1] are same as firstchar */
1934 if (len
< marker_size
+ 1 || !isspace(line
[marker_size
]))
1939 static void checkdiff_consume(void *priv
, char *line
, unsigned long len
)
1941 struct checkdiff_t
*data
= priv
;
1942 int marker_size
= data
->conflict_marker_size
;
1943 const char *ws
= diff_get_color(data
->o
->use_color
, DIFF_WHITESPACE
);
1944 const char *reset
= diff_get_color(data
->o
->use_color
, DIFF_RESET
);
1945 const char *set
= diff_get_color(data
->o
->use_color
, DIFF_FILE_NEW
);
1947 char *line_prefix
= "";
1948 struct strbuf
*msgbuf
;
1951 if (data
->o
->output_prefix
) {
1952 msgbuf
= data
->o
->output_prefix(data
->o
,
1953 data
->o
->output_prefix_data
);
1954 line_prefix
= msgbuf
->buf
;
1957 if (line
[0] == '+') {
1960 if (is_conflict_marker(line
+ 1, marker_size
, len
- 1)) {
1962 fprintf(data
->o
->file
,
1963 "%s%s:%d: leftover conflict marker\n",
1964 line_prefix
, data
->filename
, data
->lineno
);
1966 bad
= ws_check(line
+ 1, len
- 1, data
->ws_rule
);
1969 data
->status
|= bad
;
1970 err
= whitespace_error_string(bad
);
1971 fprintf(data
->o
->file
, "%s%s:%d: %s.\n",
1972 line_prefix
, data
->filename
, data
->lineno
, err
);
1974 emit_line(data
->o
, set
, reset
, line
, 1);
1975 ws_check_emit(line
+ 1, len
- 1, data
->ws_rule
,
1976 data
->o
->file
, set
, reset
, ws
);
1977 } else if (line
[0] == ' ') {
1979 } else if (line
[0] == '@') {
1980 char *plus
= strchr(line
, '+');
1982 data
->lineno
= strtol(plus
, NULL
, 10) - 1;
1984 die("invalid diff");
1988 static unsigned char *deflate_it(char *data
,
1990 unsigned long *result_size
)
1993 unsigned char *deflated
;
1996 memset(&stream
, 0, sizeof(stream
));
1997 git_deflate_init(&stream
, zlib_compression_level
);
1998 bound
= git_deflate_bound(&stream
, size
);
1999 deflated
= xmalloc(bound
);
2000 stream
.next_out
= deflated
;
2001 stream
.avail_out
= bound
;
2003 stream
.next_in
= (unsigned char *)data
;
2004 stream
.avail_in
= size
;
2005 while (git_deflate(&stream
, Z_FINISH
) == Z_OK
)
2007 git_deflate_end(&stream
);
2008 *result_size
= stream
.total_out
;
2012 static void emit_binary_diff_body(FILE *file
, mmfile_t
*one
, mmfile_t
*two
, char *prefix
)
2018 unsigned long orig_size
;
2019 unsigned long delta_size
;
2020 unsigned long deflate_size
;
2021 unsigned long data_size
;
2023 /* We could do deflated delta, or we could do just deflated two,
2024 * whichever is smaller.
2027 deflated
= deflate_it(two
->ptr
, two
->size
, &deflate_size
);
2028 if (one
->size
&& two
->size
) {
2029 delta
= diff_delta(one
->ptr
, one
->size
,
2030 two
->ptr
, two
->size
,
2031 &delta_size
, deflate_size
);
2033 void *to_free
= delta
;
2034 orig_size
= delta_size
;
2035 delta
= deflate_it(delta
, delta_size
, &delta_size
);
2040 if (delta
&& delta_size
< deflate_size
) {
2041 fprintf(file
, "%sdelta %lu\n", prefix
, orig_size
);
2044 data_size
= delta_size
;
2047 fprintf(file
, "%sliteral %lu\n", prefix
, two
->size
);
2050 data_size
= deflate_size
;
2053 /* emit data encoded in base85 */
2056 int bytes
= (52 < data_size
) ? 52 : data_size
;
2060 line
[0] = bytes
+ 'A' - 1;
2062 line
[0] = bytes
- 26 + 'a' - 1;
2063 encode_85(line
+ 1, cp
, bytes
);
2064 cp
= (char *) cp
+ bytes
;
2065 fprintf(file
, "%s", prefix
);
2069 fprintf(file
, "%s\n", prefix
);
2073 static void emit_binary_diff(FILE *file
, mmfile_t
*one
, mmfile_t
*two
, char *prefix
)
2075 fprintf(file
, "%sGIT binary patch\n", prefix
);
2076 emit_binary_diff_body(file
, one
, two
, prefix
);
2077 emit_binary_diff_body(file
, two
, one
, prefix
);
2080 int diff_filespec_is_binary(struct diff_filespec
*one
)
2082 if (one
->is_binary
== -1) {
2083 diff_filespec_load_driver(one
);
2084 if (one
->driver
->binary
!= -1)
2085 one
->is_binary
= one
->driver
->binary
;
2087 if (!one
->data
&& DIFF_FILE_VALID(one
))
2088 diff_populate_filespec(one
, 0);
2090 one
->is_binary
= buffer_is_binary(one
->data
,
2092 if (one
->is_binary
== -1)
2096 return one
->is_binary
;
2099 static const struct userdiff_funcname
*diff_funcname_pattern(struct diff_filespec
*one
)
2101 diff_filespec_load_driver(one
);
2102 return one
->driver
->funcname
.pattern
? &one
->driver
->funcname
: NULL
;
2105 void diff_set_mnemonic_prefix(struct diff_options
*options
, const char *a
, const char *b
)
2107 if (!options
->a_prefix
)
2108 options
->a_prefix
= a
;
2109 if (!options
->b_prefix
)
2110 options
->b_prefix
= b
;
2113 struct userdiff_driver
*get_textconv(struct diff_filespec
*one
)
2115 if (!DIFF_FILE_VALID(one
))
2118 diff_filespec_load_driver(one
);
2119 return userdiff_get_textconv(one
->driver
);
2122 static void builtin_diff(const char *name_a
,
2124 struct diff_filespec
*one
,
2125 struct diff_filespec
*two
,
2126 const char *xfrm_msg
,
2127 int must_show_header
,
2128 struct diff_options
*o
,
2129 int complete_rewrite
)
2133 char *a_one
, *b_two
;
2134 const char *set
= diff_get_color_opt(o
, DIFF_METAINFO
);
2135 const char *reset
= diff_get_color_opt(o
, DIFF_RESET
);
2136 const char *a_prefix
, *b_prefix
;
2137 struct userdiff_driver
*textconv_one
= NULL
;
2138 struct userdiff_driver
*textconv_two
= NULL
;
2139 struct strbuf header
= STRBUF_INIT
;
2140 struct strbuf
*msgbuf
;
2141 char *line_prefix
= "";
2143 if (o
->output_prefix
) {
2144 msgbuf
= o
->output_prefix(o
, o
->output_prefix_data
);
2145 line_prefix
= msgbuf
->buf
;
2148 if (DIFF_OPT_TST(o
, SUBMODULE_LOG
) &&
2149 (!one
->mode
|| S_ISGITLINK(one
->mode
)) &&
2150 (!two
->mode
|| S_ISGITLINK(two
->mode
))) {
2151 const char *del
= diff_get_color_opt(o
, DIFF_FILE_OLD
);
2152 const char *add
= diff_get_color_opt(o
, DIFF_FILE_NEW
);
2153 show_submodule_summary(o
->file
, one
? one
->path
: two
->path
,
2154 one
->sha1
, two
->sha1
, two
->dirty_submodule
,
2159 if (DIFF_OPT_TST(o
, ALLOW_TEXTCONV
)) {
2160 textconv_one
= get_textconv(one
);
2161 textconv_two
= get_textconv(two
);
2164 diff_set_mnemonic_prefix(o
, "a/", "b/");
2165 if (DIFF_OPT_TST(o
, REVERSE_DIFF
)) {
2166 a_prefix
= o
->b_prefix
;
2167 b_prefix
= o
->a_prefix
;
2169 a_prefix
= o
->a_prefix
;
2170 b_prefix
= o
->b_prefix
;
2173 /* Never use a non-valid filename anywhere if at all possible */
2174 name_a
= DIFF_FILE_VALID(one
) ? name_a
: name_b
;
2175 name_b
= DIFF_FILE_VALID(two
) ? name_b
: name_a
;
2177 a_one
= quote_two(a_prefix
, name_a
+ (*name_a
== '/'));
2178 b_two
= quote_two(b_prefix
, name_b
+ (*name_b
== '/'));
2179 lbl
[0] = DIFF_FILE_VALID(one
) ? a_one
: "/dev/null";
2180 lbl
[1] = DIFF_FILE_VALID(two
) ? b_two
: "/dev/null";
2181 strbuf_addf(&header
, "%s%sdiff --git %s %s%s\n", line_prefix
, set
, a_one
, b_two
, reset
);
2182 if (lbl
[0][0] == '/') {
2184 strbuf_addf(&header
, "%s%snew file mode %06o%s\n", line_prefix
, set
, two
->mode
, reset
);
2186 strbuf_addstr(&header
, xfrm_msg
);
2187 must_show_header
= 1;
2189 else if (lbl
[1][0] == '/') {
2190 strbuf_addf(&header
, "%s%sdeleted file mode %06o%s\n", line_prefix
, set
, one
->mode
, reset
);
2192 strbuf_addstr(&header
, xfrm_msg
);
2193 must_show_header
= 1;
2196 if (one
->mode
!= two
->mode
) {
2197 strbuf_addf(&header
, "%s%sold mode %06o%s\n", line_prefix
, set
, one
->mode
, reset
);
2198 strbuf_addf(&header
, "%s%snew mode %06o%s\n", line_prefix
, set
, two
->mode
, reset
);
2199 must_show_header
= 1;
2202 strbuf_addstr(&header
, xfrm_msg
);
2205 * we do not run diff between different kind
2208 if ((one
->mode
^ two
->mode
) & S_IFMT
)
2209 goto free_ab_and_return
;
2210 if (complete_rewrite
&&
2211 (textconv_one
|| !diff_filespec_is_binary(one
)) &&
2212 (textconv_two
|| !diff_filespec_is_binary(two
))) {
2213 fprintf(o
->file
, "%s", header
.buf
);
2214 strbuf_reset(&header
);
2215 emit_rewrite_diff(name_a
, name_b
, one
, two
,
2216 textconv_one
, textconv_two
, o
);
2217 o
->found_changes
= 1;
2218 goto free_ab_and_return
;
2222 if (o
->irreversible_delete
&& lbl
[1][0] == '/') {
2223 fprintf(o
->file
, "%s", header
.buf
);
2224 strbuf_reset(&header
);
2225 goto free_ab_and_return
;
2226 } else if (!DIFF_OPT_TST(o
, TEXT
) &&
2227 ( (!textconv_one
&& diff_filespec_is_binary(one
)) ||
2228 (!textconv_two
&& diff_filespec_is_binary(two
)) )) {
2229 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
2230 die("unable to read files to diff");
2231 /* Quite common confusing case */
2232 if (mf1
.size
== mf2
.size
&&
2233 !memcmp(mf1
.ptr
, mf2
.ptr
, mf1
.size
)) {
2234 if (must_show_header
)
2235 fprintf(o
->file
, "%s", header
.buf
);
2236 goto free_ab_and_return
;
2238 fprintf(o
->file
, "%s", header
.buf
);
2239 strbuf_reset(&header
);
2240 if (DIFF_OPT_TST(o
, BINARY
))
2241 emit_binary_diff(o
->file
, &mf1
, &mf2
, line_prefix
);
2243 fprintf(o
->file
, "%sBinary files %s and %s differ\n",
2244 line_prefix
, lbl
[0], lbl
[1]);
2245 o
->found_changes
= 1;
2247 /* Crazy xdl interfaces.. */
2248 const char *diffopts
= getenv("GIT_DIFF_OPTS");
2251 struct emit_callback ecbdata
;
2252 const struct userdiff_funcname
*pe
;
2254 if (must_show_header
) {
2255 fprintf(o
->file
, "%s", header
.buf
);
2256 strbuf_reset(&header
);
2259 mf1
.size
= fill_textconv(textconv_one
, one
, &mf1
.ptr
);
2260 mf2
.size
= fill_textconv(textconv_two
, two
, &mf2
.ptr
);
2262 pe
= diff_funcname_pattern(one
);
2264 pe
= diff_funcname_pattern(two
);
2266 memset(&xpp
, 0, sizeof(xpp
));
2267 memset(&xecfg
, 0, sizeof(xecfg
));
2268 memset(&ecbdata
, 0, sizeof(ecbdata
));
2269 ecbdata
.label_path
= lbl
;
2270 ecbdata
.color_diff
= want_color(o
->use_color
);
2271 ecbdata
.found_changesp
= &o
->found_changes
;
2272 ecbdata
.ws_rule
= whitespace_rule(name_b
? name_b
: name_a
);
2273 if (ecbdata
.ws_rule
& WS_BLANK_AT_EOF
)
2274 check_blank_at_eof(&mf1
, &mf2
, &ecbdata
);
2276 ecbdata
.header
= header
.len
? &header
: NULL
;
2277 xpp
.flags
= o
->xdl_opts
;
2278 xecfg
.ctxlen
= o
->context
;
2279 xecfg
.interhunkctxlen
= o
->interhunkcontext
;
2280 xecfg
.flags
= XDL_EMIT_FUNCNAMES
;
2281 if (DIFF_OPT_TST(o
, FUNCCONTEXT
))
2282 xecfg
.flags
|= XDL_EMIT_FUNCCONTEXT
;
2284 xdiff_set_find_func(&xecfg
, pe
->pattern
, pe
->cflags
);
2287 else if (!prefixcmp(diffopts
, "--unified="))
2288 xecfg
.ctxlen
= strtoul(diffopts
+ 10, NULL
, 10);
2289 else if (!prefixcmp(diffopts
, "-u"))
2290 xecfg
.ctxlen
= strtoul(diffopts
+ 2, NULL
, 10);
2292 init_diff_words_data(&ecbdata
, o
, one
, two
);
2293 xdi_diff_outf(&mf1
, &mf2
, fn_out_consume
, &ecbdata
,
2296 free_diff_words_data(&ecbdata
);
2301 xdiff_clear_find_func(&xecfg
);
2305 strbuf_release(&header
);
2306 diff_free_filespec_data(one
);
2307 diff_free_filespec_data(two
);
2313 static void builtin_diffstat(const char *name_a
, const char *name_b
,
2314 struct diff_filespec
*one
,
2315 struct diff_filespec
*two
,
2316 struct diffstat_t
*diffstat
,
2317 struct diff_options
*o
,
2318 int complete_rewrite
)
2321 struct diffstat_file
*data
;
2323 data
= diffstat_add(diffstat
, name_a
, name_b
);
2326 data
->is_unmerged
= 1;
2330 if (diff_filespec_is_binary(one
) || diff_filespec_is_binary(two
)) {
2331 data
->is_binary
= 1;
2332 data
->added
= diff_filespec_size(two
);
2333 data
->deleted
= diff_filespec_size(one
);
2336 else if (complete_rewrite
) {
2337 diff_populate_filespec(one
, 0);
2338 diff_populate_filespec(two
, 0);
2339 data
->deleted
= count_lines(one
->data
, one
->size
);
2340 data
->added
= count_lines(two
->data
, two
->size
);
2344 /* Crazy xdl interfaces.. */
2348 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
2349 die("unable to read files to diff");
2351 memset(&xpp
, 0, sizeof(xpp
));
2352 memset(&xecfg
, 0, sizeof(xecfg
));
2353 xpp
.flags
= o
->xdl_opts
;
2354 xecfg
.ctxlen
= o
->context
;
2355 xecfg
.interhunkctxlen
= o
->interhunkcontext
;
2356 xdi_diff_outf(&mf1
, &mf2
, diffstat_consume
, diffstat
,
2360 diff_free_filespec_data(one
);
2361 diff_free_filespec_data(two
);
2364 static void builtin_checkdiff(const char *name_a
, const char *name_b
,
2365 const char *attr_path
,
2366 struct diff_filespec
*one
,
2367 struct diff_filespec
*two
,
2368 struct diff_options
*o
)
2371 struct checkdiff_t data
;
2376 memset(&data
, 0, sizeof(data
));
2377 data
.filename
= name_b
? name_b
: name_a
;
2380 data
.ws_rule
= whitespace_rule(attr_path
);
2381 data
.conflict_marker_size
= ll_merge_marker_size(attr_path
);
2383 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
2384 die("unable to read files to diff");
2387 * All the other codepaths check both sides, but not checking
2388 * the "old" side here is deliberate. We are checking the newly
2389 * introduced changes, and as long as the "new" side is text, we
2390 * can and should check what it introduces.
2392 if (diff_filespec_is_binary(two
))
2393 goto free_and_return
;
2395 /* Crazy xdl interfaces.. */
2399 memset(&xpp
, 0, sizeof(xpp
));
2400 memset(&xecfg
, 0, sizeof(xecfg
));
2401 xecfg
.ctxlen
= 1; /* at least one context line */
2403 xdi_diff_outf(&mf1
, &mf2
, checkdiff_consume
, &data
,
2406 if (data
.ws_rule
& WS_BLANK_AT_EOF
) {
2407 struct emit_callback ecbdata
;
2410 ecbdata
.ws_rule
= data
.ws_rule
;
2411 check_blank_at_eof(&mf1
, &mf2
, &ecbdata
);
2412 blank_at_eof
= ecbdata
.blank_at_eof_in_postimage
;
2417 err
= whitespace_error_string(WS_BLANK_AT_EOF
);
2418 fprintf(o
->file
, "%s:%d: %s.\n",
2419 data
.filename
, blank_at_eof
, err
);
2420 data
.status
= 1; /* report errors */
2425 diff_free_filespec_data(one
);
2426 diff_free_filespec_data(two
);
2428 DIFF_OPT_SET(o
, CHECK_FAILED
);
2431 struct diff_filespec
*alloc_filespec(const char *path
)
2433 int namelen
= strlen(path
);
2434 struct diff_filespec
*spec
= xmalloc(sizeof(*spec
) + namelen
+ 1);
2436 memset(spec
, 0, sizeof(*spec
));
2437 spec
->path
= (char *)(spec
+ 1);
2438 memcpy(spec
->path
, path
, namelen
+1);
2440 spec
->is_binary
= -1;
2444 void free_filespec(struct diff_filespec
*spec
)
2446 if (!--spec
->count
) {
2447 diff_free_filespec_data(spec
);
2452 void fill_filespec(struct diff_filespec
*spec
, const unsigned char *sha1
,
2453 unsigned short mode
)
2456 spec
->mode
= canon_mode(mode
);
2457 hashcpy(spec
->sha1
, sha1
);
2458 spec
->sha1_valid
= !is_null_sha1(sha1
);
2463 * Given a name and sha1 pair, if the index tells us the file in
2464 * the work tree has that object contents, return true, so that
2465 * prepare_temp_file() does not have to inflate and extract.
2467 static int reuse_worktree_file(const char *name
, const unsigned char *sha1
, int want_file
)
2469 struct cache_entry
*ce
;
2474 * We do not read the cache ourselves here, because the
2475 * benchmark with my previous version that always reads cache
2476 * shows that it makes things worse for diff-tree comparing
2477 * two linux-2.6 kernel trees in an already checked out work
2478 * tree. This is because most diff-tree comparisons deal with
2479 * only a small number of files, while reading the cache is
2480 * expensive for a large project, and its cost outweighs the
2481 * savings we get by not inflating the object to a temporary
2482 * file. Practically, this code only helps when we are used
2483 * by diff-cache --cached, which does read the cache before
2489 /* We want to avoid the working directory if our caller
2490 * doesn't need the data in a normal file, this system
2491 * is rather slow with its stat/open/mmap/close syscalls,
2492 * and the object is contained in a pack file. The pack
2493 * is probably already open and will be faster to obtain
2494 * the data through than the working directory. Loose
2495 * objects however would tend to be slower as they need
2496 * to be individually opened and inflated.
2498 if (!FAST_WORKING_DIRECTORY
&& !want_file
&& has_sha1_pack(sha1
))
2502 pos
= cache_name_pos(name
, len
);
2505 ce
= active_cache
[pos
];
2508 * This is not the sha1 we are looking for, or
2509 * unreusable because it is not a regular file.
2511 if (hashcmp(sha1
, ce
->sha1
) || !S_ISREG(ce
->ce_mode
))
2515 * If ce is marked as "assume unchanged", there is no
2516 * guarantee that work tree matches what we are looking for.
2518 if ((ce
->ce_flags
& CE_VALID
) || ce_skip_worktree(ce
))
2522 * If ce matches the file in the work tree, we can reuse it.
2524 if (ce_uptodate(ce
) ||
2525 (!lstat(name
, &st
) && !ce_match_stat(ce
, &st
, 0)))
2531 static int populate_from_stdin(struct diff_filespec
*s
)
2533 struct strbuf buf
= STRBUF_INIT
;
2536 if (strbuf_read(&buf
, 0, 0) < 0)
2537 return error("error while reading from stdin %s",
2540 s
->should_munmap
= 0;
2541 s
->data
= strbuf_detach(&buf
, &size
);
2547 static int diff_populate_gitlink(struct diff_filespec
*s
, int size_only
)
2550 char *data
= xmalloc(100), *dirty
= "";
2552 /* Are we looking at the work tree? */
2553 if (s
->dirty_submodule
)
2556 len
= snprintf(data
, 100,
2557 "Subproject commit %s%s\n", sha1_to_hex(s
->sha1
), dirty
);
2569 * While doing rename detection and pickaxe operation, we may need to
2570 * grab the data for the blob (or file) for our own in-core comparison.
2571 * diff_filespec has data and size fields for this purpose.
2573 int diff_populate_filespec(struct diff_filespec
*s
, int size_only
)
2576 if (!DIFF_FILE_VALID(s
))
2577 die("internal error: asking to populate invalid file.");
2578 if (S_ISDIR(s
->mode
))
2584 if (size_only
&& 0 < s
->size
)
2587 if (S_ISGITLINK(s
->mode
))
2588 return diff_populate_gitlink(s
, size_only
);
2590 if (!s
->sha1_valid
||
2591 reuse_worktree_file(s
->path
, s
->sha1
, 0)) {
2592 struct strbuf buf
= STRBUF_INIT
;
2596 if (!strcmp(s
->path
, "-"))
2597 return populate_from_stdin(s
);
2599 if (lstat(s
->path
, &st
) < 0) {
2600 if (errno
== ENOENT
) {
2604 s
->data
= (char *)"";
2609 s
->size
= xsize_t(st
.st_size
);
2612 if (S_ISLNK(st
.st_mode
)) {
2613 struct strbuf sb
= STRBUF_INIT
;
2615 if (strbuf_readlink(&sb
, s
->path
, s
->size
))
2618 s
->data
= strbuf_detach(&sb
, NULL
);
2624 fd
= open(s
->path
, O_RDONLY
);
2627 s
->data
= xmmap(NULL
, s
->size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
2629 s
->should_munmap
= 1;
2632 * Convert from working tree format to canonical git format
2634 if (convert_to_git(s
->path
, s
->data
, s
->size
, &buf
, safe_crlf
)) {
2636 munmap(s
->data
, s
->size
);
2637 s
->should_munmap
= 0;
2638 s
->data
= strbuf_detach(&buf
, &size
);
2644 enum object_type type
;
2646 type
= sha1_object_info(s
->sha1
, &s
->size
);
2648 die("unable to read %s", sha1_to_hex(s
->sha1
));
2650 s
->data
= read_sha1_file(s
->sha1
, &type
, &s
->size
);
2652 die("unable to read %s", sha1_to_hex(s
->sha1
));
2659 void diff_free_filespec_blob(struct diff_filespec
*s
)
2663 else if (s
->should_munmap
)
2664 munmap(s
->data
, s
->size
);
2666 if (s
->should_free
|| s
->should_munmap
) {
2667 s
->should_free
= s
->should_munmap
= 0;
2672 void diff_free_filespec_data(struct diff_filespec
*s
)
2674 diff_free_filespec_blob(s
);
2679 static void prep_temp_blob(const char *path
, struct diff_tempfile
*temp
,
2682 const unsigned char *sha1
,
2686 struct strbuf buf
= STRBUF_INIT
;
2687 struct strbuf
template = STRBUF_INIT
;
2688 char *path_dup
= xstrdup(path
);
2689 const char *base
= basename(path_dup
);
2691 /* Generate "XXXXXX_basename.ext" */
2692 strbuf_addstr(&template, "XXXXXX_");
2693 strbuf_addstr(&template, base
);
2695 fd
= git_mkstemps(temp
->tmp_path
, PATH_MAX
, template.buf
,
2698 die_errno("unable to create temp-file");
2699 if (convert_to_working_tree(path
,
2700 (const char *)blob
, (size_t)size
, &buf
)) {
2704 if (write_in_full(fd
, blob
, size
) != size
)
2705 die_errno("unable to write temp-file");
2707 temp
->name
= temp
->tmp_path
;
2708 strcpy(temp
->hex
, sha1_to_hex(sha1
));
2710 sprintf(temp
->mode
, "%06o", mode
);
2711 strbuf_release(&buf
);
2712 strbuf_release(&template);
2716 static struct diff_tempfile
*prepare_temp_file(const char *name
,
2717 struct diff_filespec
*one
)
2719 struct diff_tempfile
*temp
= claim_diff_tempfile();
2721 if (!DIFF_FILE_VALID(one
)) {
2723 /* A '-' entry produces this for file-2, and
2724 * a '+' entry produces this for file-1.
2726 temp
->name
= "/dev/null";
2727 strcpy(temp
->hex
, ".");
2728 strcpy(temp
->mode
, ".");
2732 if (!remove_tempfile_installed
) {
2733 atexit(remove_tempfile
);
2734 sigchain_push_common(remove_tempfile_on_signal
);
2735 remove_tempfile_installed
= 1;
2738 if (!one
->sha1_valid
||
2739 reuse_worktree_file(name
, one
->sha1
, 1)) {
2741 if (lstat(name
, &st
) < 0) {
2742 if (errno
== ENOENT
)
2743 goto not_a_valid_file
;
2744 die_errno("stat(%s)", name
);
2746 if (S_ISLNK(st
.st_mode
)) {
2747 struct strbuf sb
= STRBUF_INIT
;
2748 if (strbuf_readlink(&sb
, name
, st
.st_size
) < 0)
2749 die_errno("readlink(%s)", name
);
2750 prep_temp_blob(name
, temp
, sb
.buf
, sb
.len
,
2752 one
->sha1
: null_sha1
),
2754 one
->mode
: S_IFLNK
));
2755 strbuf_release(&sb
);
2758 /* we can borrow from the file in the work tree */
2760 if (!one
->sha1_valid
)
2761 strcpy(temp
->hex
, sha1_to_hex(null_sha1
));
2763 strcpy(temp
->hex
, sha1_to_hex(one
->sha1
));
2764 /* Even though we may sometimes borrow the
2765 * contents from the work tree, we always want
2766 * one->mode. mode is trustworthy even when
2767 * !(one->sha1_valid), as long as
2768 * DIFF_FILE_VALID(one).
2770 sprintf(temp
->mode
, "%06o", one
->mode
);
2775 if (diff_populate_filespec(one
, 0))
2776 die("cannot read data blob for %s", one
->path
);
2777 prep_temp_blob(name
, temp
, one
->data
, one
->size
,
2778 one
->sha1
, one
->mode
);
2783 /* An external diff command takes:
2785 * diff-cmd name infile1 infile1-sha1 infile1-mode \
2786 * infile2 infile2-sha1 infile2-mode [ rename-to ]
2789 static void run_external_diff(const char *pgm
,
2792 struct diff_filespec
*one
,
2793 struct diff_filespec
*two
,
2794 const char *xfrm_msg
,
2795 int complete_rewrite
)
2797 const char *spawn_arg
[10];
2799 const char **arg
= &spawn_arg
[0];
2802 struct diff_tempfile
*temp_one
, *temp_two
;
2803 const char *othername
= (other
? other
: name
);
2804 temp_one
= prepare_temp_file(name
, one
);
2805 temp_two
= prepare_temp_file(othername
, two
);
2808 *arg
++ = temp_one
->name
;
2809 *arg
++ = temp_one
->hex
;
2810 *arg
++ = temp_one
->mode
;
2811 *arg
++ = temp_two
->name
;
2812 *arg
++ = temp_two
->hex
;
2813 *arg
++ = temp_two
->mode
;
2824 retval
= run_command_v_opt(spawn_arg
, RUN_USING_SHELL
);
2827 fprintf(stderr
, "external diff died, stopping at %s.\n", name
);
2832 static int similarity_index(struct diff_filepair
*p
)
2834 return p
->score
* 100 / MAX_SCORE
;
2837 static void fill_metainfo(struct strbuf
*msg
,
2840 struct diff_filespec
*one
,
2841 struct diff_filespec
*two
,
2842 struct diff_options
*o
,
2843 struct diff_filepair
*p
,
2844 int *must_show_header
,
2847 const char *set
= diff_get_color(use_color
, DIFF_METAINFO
);
2848 const char *reset
= diff_get_color(use_color
, DIFF_RESET
);
2849 struct strbuf
*msgbuf
;
2850 char *line_prefix
= "";
2852 *must_show_header
= 1;
2853 if (o
->output_prefix
) {
2854 msgbuf
= o
->output_prefix(o
, o
->output_prefix_data
);
2855 line_prefix
= msgbuf
->buf
;
2857 strbuf_init(msg
, PATH_MAX
* 2 + 300);
2858 switch (p
->status
) {
2859 case DIFF_STATUS_COPIED
:
2860 strbuf_addf(msg
, "%s%ssimilarity index %d%%",
2861 line_prefix
, set
, similarity_index(p
));
2862 strbuf_addf(msg
, "%s\n%s%scopy from ",
2863 reset
, line_prefix
, set
);
2864 quote_c_style(name
, msg
, NULL
, 0);
2865 strbuf_addf(msg
, "%s\n%s%scopy to ", reset
, line_prefix
, set
);
2866 quote_c_style(other
, msg
, NULL
, 0);
2867 strbuf_addf(msg
, "%s\n", reset
);
2869 case DIFF_STATUS_RENAMED
:
2870 strbuf_addf(msg
, "%s%ssimilarity index %d%%",
2871 line_prefix
, set
, similarity_index(p
));
2872 strbuf_addf(msg
, "%s\n%s%srename from ",
2873 reset
, line_prefix
, set
);
2874 quote_c_style(name
, msg
, NULL
, 0);
2875 strbuf_addf(msg
, "%s\n%s%srename to ",
2876 reset
, line_prefix
, set
);
2877 quote_c_style(other
, msg
, NULL
, 0);
2878 strbuf_addf(msg
, "%s\n", reset
);
2880 case DIFF_STATUS_MODIFIED
:
2882 strbuf_addf(msg
, "%s%sdissimilarity index %d%%%s\n",
2884 set
, similarity_index(p
), reset
);
2889 *must_show_header
= 0;
2891 if (one
&& two
&& hashcmp(one
->sha1
, two
->sha1
)) {
2892 int abbrev
= DIFF_OPT_TST(o
, FULL_INDEX
) ? 40 : DEFAULT_ABBREV
;
2894 if (DIFF_OPT_TST(o
, BINARY
)) {
2896 if ((!fill_mmfile(&mf
, one
) && diff_filespec_is_binary(one
)) ||
2897 (!fill_mmfile(&mf
, two
) && diff_filespec_is_binary(two
)))
2900 strbuf_addf(msg
, "%s%sindex %s..", line_prefix
, set
,
2901 find_unique_abbrev(one
->sha1
, abbrev
));
2902 strbuf_addstr(msg
, find_unique_abbrev(two
->sha1
, abbrev
));
2903 if (one
->mode
== two
->mode
)
2904 strbuf_addf(msg
, " %06o", one
->mode
);
2905 strbuf_addf(msg
, "%s\n", reset
);
2909 static void run_diff_cmd(const char *pgm
,
2912 const char *attr_path
,
2913 struct diff_filespec
*one
,
2914 struct diff_filespec
*two
,
2916 struct diff_options
*o
,
2917 struct diff_filepair
*p
)
2919 const char *xfrm_msg
= NULL
;
2920 int complete_rewrite
= (p
->status
== DIFF_STATUS_MODIFIED
) && p
->score
;
2921 int must_show_header
= 0;
2923 if (!DIFF_OPT_TST(o
, ALLOW_EXTERNAL
))
2926 struct userdiff_driver
*drv
= userdiff_find_by_path(attr_path
);
2927 if (drv
&& drv
->external
)
2928 pgm
= drv
->external
;
2933 * don't use colors when the header is intended for an
2934 * external diff driver
2936 fill_metainfo(msg
, name
, other
, one
, two
, o
, p
,
2938 want_color(o
->use_color
) && !pgm
);
2939 xfrm_msg
= msg
->len
? msg
->buf
: NULL
;
2943 run_external_diff(pgm
, name
, other
, one
, two
, xfrm_msg
,
2948 builtin_diff(name
, other
? other
: name
,
2949 one
, two
, xfrm_msg
, must_show_header
,
2950 o
, complete_rewrite
);
2952 fprintf(o
->file
, "* Unmerged path %s\n", name
);
2955 static void diff_fill_sha1_info(struct diff_filespec
*one
)
2957 if (DIFF_FILE_VALID(one
)) {
2958 if (!one
->sha1_valid
) {
2960 if (!strcmp(one
->path
, "-")) {
2961 hashcpy(one
->sha1
, null_sha1
);
2964 if (lstat(one
->path
, &st
) < 0)
2965 die_errno("stat '%s'", one
->path
);
2966 if (index_path(one
->sha1
, one
->path
, &st
, 0))
2967 die("cannot hash %s", one
->path
);
2974 static void strip_prefix(int prefix_length
, const char **namep
, const char **otherp
)
2976 /* Strip the prefix but do not molest /dev/null and absolute paths */
2977 if (*namep
&& **namep
!= '/') {
2978 *namep
+= prefix_length
;
2982 if (*otherp
&& **otherp
!= '/') {
2983 *otherp
+= prefix_length
;
2984 if (**otherp
== '/')
2989 static void run_diff(struct diff_filepair
*p
, struct diff_options
*o
)
2991 const char *pgm
= external_diff();
2993 struct diff_filespec
*one
= p
->one
;
2994 struct diff_filespec
*two
= p
->two
;
2997 const char *attr_path
;
2999 name
= p
->one
->path
;
3000 other
= (strcmp(name
, p
->two
->path
) ? p
->two
->path
: NULL
);
3002 if (o
->prefix_length
)
3003 strip_prefix(o
->prefix_length
, &name
, &other
);
3005 if (DIFF_PAIR_UNMERGED(p
)) {
3006 run_diff_cmd(pgm
, name
, NULL
, attr_path
,
3007 NULL
, NULL
, NULL
, o
, p
);
3011 diff_fill_sha1_info(one
);
3012 diff_fill_sha1_info(two
);
3015 DIFF_FILE_VALID(one
) && DIFF_FILE_VALID(two
) &&
3016 (S_IFMT
& one
->mode
) != (S_IFMT
& two
->mode
)) {
3018 * a filepair that changes between file and symlink
3019 * needs to be split into deletion and creation.
3021 struct diff_filespec
*null
= alloc_filespec(two
->path
);
3022 run_diff_cmd(NULL
, name
, other
, attr_path
,
3023 one
, null
, &msg
, o
, p
);
3025 strbuf_release(&msg
);
3027 null
= alloc_filespec(one
->path
);
3028 run_diff_cmd(NULL
, name
, other
, attr_path
,
3029 null
, two
, &msg
, o
, p
);
3033 run_diff_cmd(pgm
, name
, other
, attr_path
,
3034 one
, two
, &msg
, o
, p
);
3036 strbuf_release(&msg
);
3039 static void run_diffstat(struct diff_filepair
*p
, struct diff_options
*o
,
3040 struct diffstat_t
*diffstat
)
3044 int complete_rewrite
= 0;
3046 if (DIFF_PAIR_UNMERGED(p
)) {
3048 builtin_diffstat(p
->one
->path
, NULL
, NULL
, NULL
, diffstat
, o
, 0);
3052 name
= p
->one
->path
;
3053 other
= (strcmp(name
, p
->two
->path
) ? p
->two
->path
: NULL
);
3055 if (o
->prefix_length
)
3056 strip_prefix(o
->prefix_length
, &name
, &other
);
3058 diff_fill_sha1_info(p
->one
);
3059 diff_fill_sha1_info(p
->two
);
3061 if (p
->status
== DIFF_STATUS_MODIFIED
&& p
->score
)
3062 complete_rewrite
= 1;
3063 builtin_diffstat(name
, other
, p
->one
, p
->two
, diffstat
, o
, complete_rewrite
);
3066 static void run_checkdiff(struct diff_filepair
*p
, struct diff_options
*o
)
3070 const char *attr_path
;
3072 if (DIFF_PAIR_UNMERGED(p
)) {
3077 name
= p
->one
->path
;
3078 other
= (strcmp(name
, p
->two
->path
) ? p
->two
->path
: NULL
);
3079 attr_path
= other
? other
: name
;
3081 if (o
->prefix_length
)
3082 strip_prefix(o
->prefix_length
, &name
, &other
);
3084 diff_fill_sha1_info(p
->one
);
3085 diff_fill_sha1_info(p
->two
);
3087 builtin_checkdiff(name
, other
, attr_path
, p
->one
, p
->two
, o
);
3090 void diff_setup(struct diff_options
*options
)
3092 memcpy(options
, &default_diff_options
, sizeof(*options
));
3094 options
->file
= stdout
;
3096 options
->line_termination
= '\n';
3097 options
->break_opt
= -1;
3098 options
->rename_limit
= -1;
3099 options
->dirstat_permille
= diff_dirstat_permille_default
;
3100 options
->context
= 3;
3102 options
->change
= diff_change
;
3103 options
->add_remove
= diff_addremove
;
3104 options
->use_color
= diff_use_color_default
;
3105 options
->detect_rename
= diff_detect_rename_default
;
3107 if (diff_no_prefix
) {
3108 options
->a_prefix
= options
->b_prefix
= "";
3109 } else if (!diff_mnemonic_prefix
) {
3110 options
->a_prefix
= "a/";
3111 options
->b_prefix
= "b/";
3115 int diff_setup_done(struct diff_options
*options
)
3119 if (options
->output_format
& DIFF_FORMAT_NAME
)
3121 if (options
->output_format
& DIFF_FORMAT_NAME_STATUS
)
3123 if (options
->output_format
& DIFF_FORMAT_CHECKDIFF
)
3125 if (options
->output_format
& DIFF_FORMAT_NO_OUTPUT
)
3128 die("--name-only, --name-status, --check and -s are mutually exclusive");
3131 * Most of the time we can say "there are changes"
3132 * only by checking if there are changed paths, but
3133 * --ignore-whitespace* options force us to look
3137 if (DIFF_XDL_TST(options
, IGNORE_WHITESPACE
) ||
3138 DIFF_XDL_TST(options
, IGNORE_WHITESPACE_CHANGE
) ||
3139 DIFF_XDL_TST(options
, IGNORE_WHITESPACE_AT_EOL
))
3140 DIFF_OPT_SET(options
, DIFF_FROM_CONTENTS
);
3142 DIFF_OPT_CLR(options
, DIFF_FROM_CONTENTS
);
3144 if (DIFF_OPT_TST(options
, FIND_COPIES_HARDER
))
3145 options
->detect_rename
= DIFF_DETECT_COPY
;
3147 if (!DIFF_OPT_TST(options
, RELATIVE_NAME
))
3148 options
->prefix
= NULL
;
3149 if (options
->prefix
)
3150 options
->prefix_length
= strlen(options
->prefix
);
3152 options
->prefix_length
= 0;
3154 if (options
->output_format
& (DIFF_FORMAT_NAME
|
3155 DIFF_FORMAT_NAME_STATUS
|
3156 DIFF_FORMAT_CHECKDIFF
|
3157 DIFF_FORMAT_NO_OUTPUT
))
3158 options
->output_format
&= ~(DIFF_FORMAT_RAW
|
3159 DIFF_FORMAT_NUMSTAT
|
3160 DIFF_FORMAT_DIFFSTAT
|
3161 DIFF_FORMAT_SHORTSTAT
|
3162 DIFF_FORMAT_DIRSTAT
|
3163 DIFF_FORMAT_SUMMARY
|
3167 * These cases always need recursive; we do not drop caller-supplied
3168 * recursive bits for other formats here.
3170 if (options
->output_format
& (DIFF_FORMAT_PATCH
|
3171 DIFF_FORMAT_NUMSTAT
|
3172 DIFF_FORMAT_DIFFSTAT
|
3173 DIFF_FORMAT_SHORTSTAT
|
3174 DIFF_FORMAT_DIRSTAT
|
3175 DIFF_FORMAT_SUMMARY
|
3176 DIFF_FORMAT_CHECKDIFF
))
3177 DIFF_OPT_SET(options
, RECURSIVE
);
3179 * Also pickaxe would not work very well if you do not say recursive
3181 if (options
->pickaxe
)
3182 DIFF_OPT_SET(options
, RECURSIVE
);
3184 * When patches are generated, submodules diffed against the work tree
3185 * must be checked for dirtiness too so it can be shown in the output
3187 if (options
->output_format
& DIFF_FORMAT_PATCH
)
3188 DIFF_OPT_SET(options
, DIRTY_SUBMODULES
);
3190 if (options
->detect_rename
&& options
->rename_limit
< 0)
3191 options
->rename_limit
= diff_rename_limit_default
;
3192 if (options
->setup
& DIFF_SETUP_USE_CACHE
) {
3194 /* read-cache does not die even when it fails
3195 * so it is safe for us to do this here. Also
3196 * it does not smudge active_cache or active_nr
3197 * when it fails, so we do not have to worry about
3198 * cleaning it up ourselves either.
3202 if (options
->abbrev
<= 0 || 40 < options
->abbrev
)
3203 options
->abbrev
= 40; /* full */
3206 * It does not make sense to show the first hit we happened
3207 * to have found. It does not make sense not to return with
3208 * exit code in such a case either.
3210 if (DIFF_OPT_TST(options
, QUICK
)) {
3211 options
->output_format
= DIFF_FORMAT_NO_OUTPUT
;
3212 DIFF_OPT_SET(options
, EXIT_WITH_STATUS
);
3218 static int opt_arg(const char *arg
, int arg_short
, const char *arg_long
, int *val
)
3228 if (c
== arg_short
) {
3232 if (val
&& isdigit(c
)) {
3234 int n
= strtoul(arg
, &end
, 10);
3245 eq
= strchr(arg
, '=');
3250 if (!len
|| strncmp(arg
, arg_long
, len
))
3255 if (!isdigit(*++eq
))
3257 n
= strtoul(eq
, &end
, 10);
3265 static int diff_scoreopt_parse(const char *opt
);
3267 static inline int short_opt(char opt
, const char **argv
,
3268 const char **optarg
)
3270 const char *arg
= argv
[0];
3271 if (arg
[0] != '-' || arg
[1] != opt
)
3273 if (arg
[2] != '\0') {
3278 die("Option '%c' requires a value", opt
);
3283 int parse_long_opt(const char *opt
, const char **argv
,
3284 const char **optarg
)
3286 const char *arg
= argv
[0];
3287 if (arg
[0] != '-' || arg
[1] != '-')
3289 arg
+= strlen("--");
3290 if (prefixcmp(arg
, opt
))
3293 if (*arg
== '=') { /* sticked form: --option=value */
3299 /* separate form: --option value */
3301 die("Option '--%s' requires a value", opt
);
3306 static int stat_opt(struct diff_options
*options
, const char **av
)
3308 const char *arg
= av
[0];
3310 int width
= options
->stat_width
;
3311 int name_width
= options
->stat_name_width
;
3312 int count
= options
->stat_count
;
3315 arg
+= strlen("--stat");
3320 if (!prefixcmp(arg
, "-width")) {
3321 arg
+= strlen("-width");
3323 width
= strtoul(arg
+ 1, &end
, 10);
3324 else if (!*arg
&& !av
[1])
3325 die("Option '--stat-width' requires a value");
3327 width
= strtoul(av
[1], &end
, 10);
3330 } else if (!prefixcmp(arg
, "-name-width")) {
3331 arg
+= strlen("-name-width");
3333 name_width
= strtoul(arg
+ 1, &end
, 10);
3334 else if (!*arg
&& !av
[1])
3335 die("Option '--stat-name-width' requires a value");
3337 name_width
= strtoul(av
[1], &end
, 10);
3340 } else if (!prefixcmp(arg
, "-count")) {
3341 arg
+= strlen("-count");
3343 count
= strtoul(arg
+ 1, &end
, 10);
3344 else if (!*arg
&& !av
[1])
3345 die("Option '--stat-count' requires a value");
3347 count
= strtoul(av
[1], &end
, 10);
3353 width
= strtoul(arg
+1, &end
, 10);
3355 name_width
= strtoul(end
+1, &end
, 10);
3357 count
= strtoul(end
+1, &end
, 10);
3360 /* Important! This checks all the error cases! */
3363 options
->output_format
|= DIFF_FORMAT_DIFFSTAT
;
3364 options
->stat_name_width
= name_width
;
3365 options
->stat_width
= width
;
3366 options
->stat_count
= count
;
3370 static int parse_dirstat_opt(struct diff_options
*options
, const char *params
)
3372 struct strbuf errmsg
= STRBUF_INIT
;
3373 if (parse_dirstat_params(options
, params
, &errmsg
))
3374 die(_("Failed to parse --dirstat/-X option parameter:\n%s"),
3376 strbuf_release(&errmsg
);
3378 * The caller knows a dirstat-related option is given from the command
3379 * line; allow it to say "return this_function();"
3381 options
->output_format
|= DIFF_FORMAT_DIRSTAT
;
3385 int diff_opt_parse(struct diff_options
*options
, const char **av
, int ac
)
3387 const char *arg
= av
[0];
3391 /* Output format options */
3392 if (!strcmp(arg
, "-p") || !strcmp(arg
, "-u") || !strcmp(arg
, "--patch"))
3393 options
->output_format
|= DIFF_FORMAT_PATCH
;
3394 else if (opt_arg(arg
, 'U', "unified", &options
->context
))
3395 options
->output_format
|= DIFF_FORMAT_PATCH
;
3396 else if (!strcmp(arg
, "--raw"))
3397 options
->output_format
|= DIFF_FORMAT_RAW
;
3398 else if (!strcmp(arg
, "--patch-with-raw"))
3399 options
->output_format
|= DIFF_FORMAT_PATCH
| DIFF_FORMAT_RAW
;
3400 else if (!strcmp(arg
, "--numstat"))
3401 options
->output_format
|= DIFF_FORMAT_NUMSTAT
;
3402 else if (!strcmp(arg
, "--shortstat"))
3403 options
->output_format
|= DIFF_FORMAT_SHORTSTAT
;
3404 else if (!strcmp(arg
, "-X") || !strcmp(arg
, "--dirstat"))
3405 return parse_dirstat_opt(options
, "");
3406 else if (!prefixcmp(arg
, "-X"))
3407 return parse_dirstat_opt(options
, arg
+ 2);
3408 else if (!prefixcmp(arg
, "--dirstat="))
3409 return parse_dirstat_opt(options
, arg
+ 10);
3410 else if (!strcmp(arg
, "--cumulative"))
3411 return parse_dirstat_opt(options
, "cumulative");
3412 else if (!strcmp(arg
, "--dirstat-by-file"))
3413 return parse_dirstat_opt(options
, "files");
3414 else if (!prefixcmp(arg
, "--dirstat-by-file=")) {
3415 parse_dirstat_opt(options
, "files");
3416 return parse_dirstat_opt(options
, arg
+ 18);
3418 else if (!strcmp(arg
, "--check"))
3419 options
->output_format
|= DIFF_FORMAT_CHECKDIFF
;
3420 else if (!strcmp(arg
, "--summary"))
3421 options
->output_format
|= DIFF_FORMAT_SUMMARY
;
3422 else if (!strcmp(arg
, "--patch-with-stat"))
3423 options
->output_format
|= DIFF_FORMAT_PATCH
| DIFF_FORMAT_DIFFSTAT
;
3424 else if (!strcmp(arg
, "--name-only"))
3425 options
->output_format
|= DIFF_FORMAT_NAME
;
3426 else if (!strcmp(arg
, "--name-status"))
3427 options
->output_format
|= DIFF_FORMAT_NAME_STATUS
;
3428 else if (!strcmp(arg
, "-s"))
3429 options
->output_format
|= DIFF_FORMAT_NO_OUTPUT
;
3430 else if (!prefixcmp(arg
, "--stat"))
3431 /* --stat, --stat-width, --stat-name-width, or --stat-count */
3432 return stat_opt(options
, av
);
3434 /* renames options */
3435 else if (!prefixcmp(arg
, "-B") || !prefixcmp(arg
, "--break-rewrites=") ||
3436 !strcmp(arg
, "--break-rewrites")) {
3437 if ((options
->break_opt
= diff_scoreopt_parse(arg
)) == -1)
3438 return error("invalid argument to -B: %s", arg
+2);
3440 else if (!prefixcmp(arg
, "-M") || !prefixcmp(arg
, "--find-renames=") ||
3441 !strcmp(arg
, "--find-renames")) {
3442 if ((options
->rename_score
= diff_scoreopt_parse(arg
)) == -1)
3443 return error("invalid argument to -M: %s", arg
+2);
3444 options
->detect_rename
= DIFF_DETECT_RENAME
;
3446 else if (!strcmp(arg
, "-D") || !strcmp(arg
, "--irreversible-delete")) {
3447 options
->irreversible_delete
= 1;
3449 else if (!prefixcmp(arg
, "-C") || !prefixcmp(arg
, "--find-copies=") ||
3450 !strcmp(arg
, "--find-copies")) {
3451 if (options
->detect_rename
== DIFF_DETECT_COPY
)
3452 DIFF_OPT_SET(options
, FIND_COPIES_HARDER
);
3453 if ((options
->rename_score
= diff_scoreopt_parse(arg
)) == -1)
3454 return error("invalid argument to -C: %s", arg
+2);
3455 options
->detect_rename
= DIFF_DETECT_COPY
;
3457 else if (!strcmp(arg
, "--no-renames"))
3458 options
->detect_rename
= 0;
3459 else if (!strcmp(arg
, "--relative"))
3460 DIFF_OPT_SET(options
, RELATIVE_NAME
);
3461 else if (!prefixcmp(arg
, "--relative=")) {
3462 DIFF_OPT_SET(options
, RELATIVE_NAME
);
3463 options
->prefix
= arg
+ 11;
3467 else if (!strcmp(arg
, "--minimal"))
3468 DIFF_XDL_SET(options
, NEED_MINIMAL
);
3469 else if (!strcmp(arg
, "--no-minimal"))
3470 DIFF_XDL_CLR(options
, NEED_MINIMAL
);
3471 else if (!strcmp(arg
, "-w") || !strcmp(arg
, "--ignore-all-space"))
3472 DIFF_XDL_SET(options
, IGNORE_WHITESPACE
);
3473 else if (!strcmp(arg
, "-b") || !strcmp(arg
, "--ignore-space-change"))
3474 DIFF_XDL_SET(options
, IGNORE_WHITESPACE_CHANGE
);
3475 else if (!strcmp(arg
, "--ignore-space-at-eol"))
3476 DIFF_XDL_SET(options
, IGNORE_WHITESPACE_AT_EOL
);
3477 else if (!strcmp(arg
, "--patience"))
3478 DIFF_XDL_SET(options
, PATIENCE_DIFF
);
3479 else if (!strcmp(arg
, "--histogram"))
3480 DIFF_XDL_SET(options
, HISTOGRAM_DIFF
);
3483 else if (!strcmp(arg
, "--binary")) {
3484 options
->output_format
|= DIFF_FORMAT_PATCH
;
3485 DIFF_OPT_SET(options
, BINARY
);
3487 else if (!strcmp(arg
, "--full-index"))
3488 DIFF_OPT_SET(options
, FULL_INDEX
);
3489 else if (!strcmp(arg
, "-a") || !strcmp(arg
, "--text"))
3490 DIFF_OPT_SET(options
, TEXT
);
3491 else if (!strcmp(arg
, "-R"))
3492 DIFF_OPT_SET(options
, REVERSE_DIFF
);
3493 else if (!strcmp(arg
, "--find-copies-harder"))
3494 DIFF_OPT_SET(options
, FIND_COPIES_HARDER
);
3495 else if (!strcmp(arg
, "--follow"))
3496 DIFF_OPT_SET(options
, FOLLOW_RENAMES
);
3497 else if (!strcmp(arg
, "--color"))
3498 options
->use_color
= 1;
3499 else if (!prefixcmp(arg
, "--color=")) {
3500 int value
= git_config_colorbool(NULL
, arg
+8);
3502 return error("option `color' expects \"always\", \"auto\", or \"never\"");
3503 options
->use_color
= value
;
3505 else if (!strcmp(arg
, "--no-color"))
3506 options
->use_color
= 0;
3507 else if (!strcmp(arg
, "--color-words")) {
3508 options
->use_color
= 1;
3509 options
->word_diff
= DIFF_WORDS_COLOR
;
3511 else if (!prefixcmp(arg
, "--color-words=")) {
3512 options
->use_color
= 1;
3513 options
->word_diff
= DIFF_WORDS_COLOR
;
3514 options
->word_regex
= arg
+ 14;
3516 else if (!strcmp(arg
, "--word-diff")) {
3517 if (options
->word_diff
== DIFF_WORDS_NONE
)
3518 options
->word_diff
= DIFF_WORDS_PLAIN
;
3520 else if (!prefixcmp(arg
, "--word-diff=")) {
3521 const char *type
= arg
+ 12;
3522 if (!strcmp(type
, "plain"))
3523 options
->word_diff
= DIFF_WORDS_PLAIN
;
3524 else if (!strcmp(type
, "color")) {
3525 options
->use_color
= 1;
3526 options
->word_diff
= DIFF_WORDS_COLOR
;
3528 else if (!strcmp(type
, "porcelain"))
3529 options
->word_diff
= DIFF_WORDS_PORCELAIN
;
3530 else if (!strcmp(type
, "none"))
3531 options
->word_diff
= DIFF_WORDS_NONE
;
3533 die("bad --word-diff argument: %s", type
);
3535 else if ((argcount
= parse_long_opt("word-diff-regex", av
, &optarg
))) {
3536 if (options
->word_diff
== DIFF_WORDS_NONE
)
3537 options
->word_diff
= DIFF_WORDS_PLAIN
;
3538 options
->word_regex
= optarg
;
3541 else if (!strcmp(arg
, "--exit-code"))
3542 DIFF_OPT_SET(options
, EXIT_WITH_STATUS
);
3543 else if (!strcmp(arg
, "--quiet"))
3544 DIFF_OPT_SET(options
, QUICK
);
3545 else if (!strcmp(arg
, "--ext-diff"))
3546 DIFF_OPT_SET(options
, ALLOW_EXTERNAL
);
3547 else if (!strcmp(arg
, "--no-ext-diff"))
3548 DIFF_OPT_CLR(options
, ALLOW_EXTERNAL
);
3549 else if (!strcmp(arg
, "--textconv"))
3550 DIFF_OPT_SET(options
, ALLOW_TEXTCONV
);
3551 else if (!strcmp(arg
, "--no-textconv"))
3552 DIFF_OPT_CLR(options
, ALLOW_TEXTCONV
);
3553 else if (!strcmp(arg
, "--ignore-submodules")) {
3554 DIFF_OPT_SET(options
, OVERRIDE_SUBMODULE_CONFIG
);
3555 handle_ignore_submodules_arg(options
, "all");
3556 } else if (!prefixcmp(arg
, "--ignore-submodules=")) {
3557 DIFF_OPT_SET(options
, OVERRIDE_SUBMODULE_CONFIG
);
3558 handle_ignore_submodules_arg(options
, arg
+ 20);
3559 } else if (!strcmp(arg
, "--submodule"))
3560 DIFF_OPT_SET(options
, SUBMODULE_LOG
);
3561 else if (!prefixcmp(arg
, "--submodule=")) {
3562 if (!strcmp(arg
+ 12, "log"))
3563 DIFF_OPT_SET(options
, SUBMODULE_LOG
);
3567 else if (!strcmp(arg
, "-z"))
3568 options
->line_termination
= 0;
3569 else if ((argcount
= short_opt('l', av
, &optarg
))) {
3570 options
->rename_limit
= strtoul(optarg
, NULL
, 10);
3573 else if ((argcount
= short_opt('S', av
, &optarg
))) {
3574 options
->pickaxe
= optarg
;
3575 options
->pickaxe_opts
|= DIFF_PICKAXE_KIND_S
;
3577 } else if ((argcount
= short_opt('G', av
, &optarg
))) {
3578 options
->pickaxe
= optarg
;
3579 options
->pickaxe_opts
|= DIFF_PICKAXE_KIND_G
;
3582 else if (!strcmp(arg
, "--pickaxe-all"))
3583 options
->pickaxe_opts
|= DIFF_PICKAXE_ALL
;
3584 else if (!strcmp(arg
, "--pickaxe-regex"))
3585 options
->pickaxe_opts
|= DIFF_PICKAXE_REGEX
;
3586 else if ((argcount
= short_opt('O', av
, &optarg
))) {
3587 options
->orderfile
= optarg
;
3590 else if ((argcount
= parse_long_opt("diff-filter", av
, &optarg
))) {
3591 options
->filter
= optarg
;
3594 else if (!strcmp(arg
, "--abbrev"))
3595 options
->abbrev
= DEFAULT_ABBREV
;
3596 else if (!prefixcmp(arg
, "--abbrev=")) {
3597 options
->abbrev
= strtoul(arg
+ 9, NULL
, 10);
3598 if (options
->abbrev
< MINIMUM_ABBREV
)
3599 options
->abbrev
= MINIMUM_ABBREV
;
3600 else if (40 < options
->abbrev
)
3601 options
->abbrev
= 40;
3603 else if ((argcount
= parse_long_opt("src-prefix", av
, &optarg
))) {
3604 options
->a_prefix
= optarg
;
3607 else if ((argcount
= parse_long_opt("dst-prefix", av
, &optarg
))) {
3608 options
->b_prefix
= optarg
;
3611 else if (!strcmp(arg
, "--no-prefix"))
3612 options
->a_prefix
= options
->b_prefix
= "";
3613 else if (opt_arg(arg
, '\0', "inter-hunk-context",
3614 &options
->interhunkcontext
))
3616 else if (!strcmp(arg
, "-W"))
3617 DIFF_OPT_SET(options
, FUNCCONTEXT
);
3618 else if (!strcmp(arg
, "--function-context"))
3619 DIFF_OPT_SET(options
, FUNCCONTEXT
);
3620 else if (!strcmp(arg
, "--no-function-context"))
3621 DIFF_OPT_CLR(options
, FUNCCONTEXT
);
3622 else if ((argcount
= parse_long_opt("output", av
, &optarg
))) {
3623 options
->file
= fopen(optarg
, "w");
3625 die_errno("Could not open '%s'", optarg
);
3626 options
->close_file
= 1;
3633 int parse_rename_score(const char **cp_p
)
3635 unsigned long num
, scale
;
3637 const char *cp
= *cp_p
;
3644 if ( !dot
&& ch
== '.' ) {
3647 } else if ( ch
== '%' ) {
3648 scale
= dot
? scale
*100 : 100;
3649 cp
++; /* % is always at the end */
3651 } else if ( ch
>= '0' && ch
<= '9' ) {
3652 if ( scale
< 100000 ) {
3654 num
= (num
*10) + (ch
-'0');
3663 /* user says num divided by scale and we say internally that
3664 * is MAX_SCORE * num / scale.
3666 return (int)((num
>= scale
) ? MAX_SCORE
: (MAX_SCORE
* num
/ scale
));
3669 static int diff_scoreopt_parse(const char *opt
)
3671 int opt1
, opt2
, cmd
;
3677 /* convert the long-form arguments into short-form versions */
3678 if (!prefixcmp(opt
, "break-rewrites")) {
3679 opt
+= strlen("break-rewrites");
3680 if (*opt
== 0 || *opt
++ == '=')
3682 } else if (!prefixcmp(opt
, "find-copies")) {
3683 opt
+= strlen("find-copies");
3684 if (*opt
== 0 || *opt
++ == '=')
3686 } else if (!prefixcmp(opt
, "find-renames")) {
3687 opt
+= strlen("find-renames");
3688 if (*opt
== 0 || *opt
++ == '=')
3692 if (cmd
!= 'M' && cmd
!= 'C' && cmd
!= 'B')
3693 return -1; /* that is not a -M, -C nor -B option */
3695 opt1
= parse_rename_score(&opt
);
3701 else if (*opt
!= '/')
3702 return -1; /* we expect -B80/99 or -B80 */
3705 opt2
= parse_rename_score(&opt
);
3710 return opt1
| (opt2
<< 16);
3713 struct diff_queue_struct diff_queued_diff
;
3715 void diff_q(struct diff_queue_struct
*queue
, struct diff_filepair
*dp
)
3717 if (queue
->alloc
<= queue
->nr
) {
3718 queue
->alloc
= alloc_nr(queue
->alloc
);
3719 queue
->queue
= xrealloc(queue
->queue
,
3720 sizeof(dp
) * queue
->alloc
);
3722 queue
->queue
[queue
->nr
++] = dp
;
3725 struct diff_filepair
*diff_queue(struct diff_queue_struct
*queue
,
3726 struct diff_filespec
*one
,
3727 struct diff_filespec
*two
)
3729 struct diff_filepair
*dp
= xcalloc(1, sizeof(*dp
));
3737 void diff_free_filepair(struct diff_filepair
*p
)
3739 free_filespec(p
->one
);
3740 free_filespec(p
->two
);
3744 /* This is different from find_unique_abbrev() in that
3745 * it stuffs the result with dots for alignment.
3747 const char *diff_unique_abbrev(const unsigned char *sha1
, int len
)
3752 return sha1_to_hex(sha1
);
3754 abbrev
= find_unique_abbrev(sha1
, len
);
3755 abblen
= strlen(abbrev
);
3757 static char hex
[41];
3758 if (len
< abblen
&& abblen
<= len
+ 2)
3759 sprintf(hex
, "%s%.*s", abbrev
, len
+3-abblen
, "..");
3761 sprintf(hex
, "%s...", abbrev
);
3764 return sha1_to_hex(sha1
);
3767 static void diff_flush_raw(struct diff_filepair
*p
, struct diff_options
*opt
)
3769 int line_termination
= opt
->line_termination
;
3770 int inter_name_termination
= line_termination
? '\t' : '\0';
3771 if (opt
->output_prefix
) {
3772 struct strbuf
*msg
= NULL
;
3773 msg
= opt
->output_prefix(opt
, opt
->output_prefix_data
);
3774 fprintf(opt
->file
, "%s", msg
->buf
);
3777 if (!(opt
->output_format
& DIFF_FORMAT_NAME_STATUS
)) {
3778 fprintf(opt
->file
, ":%06o %06o %s ", p
->one
->mode
, p
->two
->mode
,
3779 diff_unique_abbrev(p
->one
->sha1
, opt
->abbrev
));
3780 fprintf(opt
->file
, "%s ", diff_unique_abbrev(p
->two
->sha1
, opt
->abbrev
));
3783 fprintf(opt
->file
, "%c%03d%c", p
->status
, similarity_index(p
),
3784 inter_name_termination
);
3786 fprintf(opt
->file
, "%c%c", p
->status
, inter_name_termination
);
3789 if (p
->status
== DIFF_STATUS_COPIED
||
3790 p
->status
== DIFF_STATUS_RENAMED
) {
3791 const char *name_a
, *name_b
;
3792 name_a
= p
->one
->path
;
3793 name_b
= p
->two
->path
;
3794 strip_prefix(opt
->prefix_length
, &name_a
, &name_b
);
3795 write_name_quoted(name_a
, opt
->file
, inter_name_termination
);
3796 write_name_quoted(name_b
, opt
->file
, line_termination
);
3798 const char *name_a
, *name_b
;
3799 name_a
= p
->one
->mode
? p
->one
->path
: p
->two
->path
;
3801 strip_prefix(opt
->prefix_length
, &name_a
, &name_b
);
3802 write_name_quoted(name_a
, opt
->file
, line_termination
);
3806 int diff_unmodified_pair(struct diff_filepair
*p
)
3808 /* This function is written stricter than necessary to support
3809 * the currently implemented transformers, but the idea is to
3810 * let transformers to produce diff_filepairs any way they want,
3811 * and filter and clean them up here before producing the output.
3813 struct diff_filespec
*one
= p
->one
, *two
= p
->two
;
3815 if (DIFF_PAIR_UNMERGED(p
))
3816 return 0; /* unmerged is interesting */
3818 /* deletion, addition, mode or type change
3819 * and rename are all interesting.
3821 if (DIFF_FILE_VALID(one
) != DIFF_FILE_VALID(two
) ||
3822 DIFF_PAIR_MODE_CHANGED(p
) ||
3823 strcmp(one
->path
, two
->path
))
3826 /* both are valid and point at the same path. that is, we are
3827 * dealing with a change.
3829 if (one
->sha1_valid
&& two
->sha1_valid
&&
3830 !hashcmp(one
->sha1
, two
->sha1
) &&
3831 !one
->dirty_submodule
&& !two
->dirty_submodule
)
3832 return 1; /* no change */
3833 if (!one
->sha1_valid
&& !two
->sha1_valid
)
3834 return 1; /* both look at the same file on the filesystem. */
3838 static void diff_flush_patch(struct diff_filepair
*p
, struct diff_options
*o
)
3840 if (diff_unmodified_pair(p
))
3843 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
3844 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
3845 return; /* no tree diffs in patch format */
3850 static void diff_flush_stat(struct diff_filepair
*p
, struct diff_options
*o
,
3851 struct diffstat_t
*diffstat
)
3853 if (diff_unmodified_pair(p
))
3856 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
3857 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
3858 return; /* no useful stat for tree diffs */
3860 run_diffstat(p
, o
, diffstat
);
3863 static void diff_flush_checkdiff(struct diff_filepair
*p
,
3864 struct diff_options
*o
)
3866 if (diff_unmodified_pair(p
))
3869 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
3870 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
3871 return; /* nothing to check in tree diffs */
3873 run_checkdiff(p
, o
);
3876 int diff_queue_is_empty(void)
3878 struct diff_queue_struct
*q
= &diff_queued_diff
;
3880 for (i
= 0; i
< q
->nr
; i
++)
3881 if (!diff_unmodified_pair(q
->queue
[i
]))
3887 void diff_debug_filespec(struct diff_filespec
*s
, int x
, const char *one
)
3889 fprintf(stderr
, "queue[%d] %s (%s) %s %06o %s\n",
3892 DIFF_FILE_VALID(s
) ? "valid" : "invalid",
3894 s
->sha1_valid
? sha1_to_hex(s
->sha1
) : "");
3895 fprintf(stderr
, "queue[%d] %s size %lu flags %d\n",
3897 s
->size
, s
->xfrm_flags
);
3900 void diff_debug_filepair(const struct diff_filepair
*p
, int i
)
3902 diff_debug_filespec(p
->one
, i
, "one");
3903 diff_debug_filespec(p
->two
, i
, "two");
3904 fprintf(stderr
, "score %d, status %c rename_used %d broken %d\n",
3905 p
->score
, p
->status
? p
->status
: '?',
3906 p
->one
->rename_used
, p
->broken_pair
);
3909 void diff_debug_queue(const char *msg
, struct diff_queue_struct
*q
)
3913 fprintf(stderr
, "%s\n", msg
);
3914 fprintf(stderr
, "q->nr = %d\n", q
->nr
);
3915 for (i
= 0; i
< q
->nr
; i
++) {
3916 struct diff_filepair
*p
= q
->queue
[i
];
3917 diff_debug_filepair(p
, i
);
3922 static void diff_resolve_rename_copy(void)
3925 struct diff_filepair
*p
;
3926 struct diff_queue_struct
*q
= &diff_queued_diff
;
3928 diff_debug_queue("resolve-rename-copy", q
);
3930 for (i
= 0; i
< q
->nr
; i
++) {
3932 p
->status
= 0; /* undecided */
3933 if (DIFF_PAIR_UNMERGED(p
))
3934 p
->status
= DIFF_STATUS_UNMERGED
;
3935 else if (!DIFF_FILE_VALID(p
->one
))
3936 p
->status
= DIFF_STATUS_ADDED
;
3937 else if (!DIFF_FILE_VALID(p
->two
))
3938 p
->status
= DIFF_STATUS_DELETED
;
3939 else if (DIFF_PAIR_TYPE_CHANGED(p
))
3940 p
->status
= DIFF_STATUS_TYPE_CHANGED
;
3942 /* from this point on, we are dealing with a pair
3943 * whose both sides are valid and of the same type, i.e.
3944 * either in-place edit or rename/copy edit.
3946 else if (DIFF_PAIR_RENAME(p
)) {
3948 * A rename might have re-connected a broken
3949 * pair up, causing the pathnames to be the
3950 * same again. If so, that's not a rename at
3951 * all, just a modification..
3953 * Otherwise, see if this source was used for
3954 * multiple renames, in which case we decrement
3955 * the count, and call it a copy.
3957 if (!strcmp(p
->one
->path
, p
->two
->path
))
3958 p
->status
= DIFF_STATUS_MODIFIED
;
3959 else if (--p
->one
->rename_used
> 0)
3960 p
->status
= DIFF_STATUS_COPIED
;
3962 p
->status
= DIFF_STATUS_RENAMED
;
3964 else if (hashcmp(p
->one
->sha1
, p
->two
->sha1
) ||
3965 p
->one
->mode
!= p
->two
->mode
||
3966 p
->one
->dirty_submodule
||
3967 p
->two
->dirty_submodule
||
3968 is_null_sha1(p
->one
->sha1
))
3969 p
->status
= DIFF_STATUS_MODIFIED
;
3971 /* This is a "no-change" entry and should not
3972 * happen anymore, but prepare for broken callers.
3974 error("feeding unmodified %s to diffcore",
3976 p
->status
= DIFF_STATUS_UNKNOWN
;
3979 diff_debug_queue("resolve-rename-copy done", q
);
3982 static int check_pair_status(struct diff_filepair
*p
)
3984 switch (p
->status
) {
3985 case DIFF_STATUS_UNKNOWN
:
3988 die("internal error in diff-resolve-rename-copy");
3994 static void flush_one_pair(struct diff_filepair
*p
, struct diff_options
*opt
)
3996 int fmt
= opt
->output_format
;
3998 if (fmt
& DIFF_FORMAT_CHECKDIFF
)
3999 diff_flush_checkdiff(p
, opt
);
4000 else if (fmt
& (DIFF_FORMAT_RAW
| DIFF_FORMAT_NAME_STATUS
))
4001 diff_flush_raw(p
, opt
);
4002 else if (fmt
& DIFF_FORMAT_NAME
) {
4003 const char *name_a
, *name_b
;
4004 name_a
= p
->two
->path
;
4006 strip_prefix(opt
->prefix_length
, &name_a
, &name_b
);
4007 write_name_quoted(name_a
, opt
->file
, opt
->line_termination
);
4011 static void show_file_mode_name(FILE *file
, const char *newdelete
, struct diff_filespec
*fs
)
4014 fprintf(file
, " %s mode %06o ", newdelete
, fs
->mode
);
4016 fprintf(file
, " %s ", newdelete
);
4017 write_name_quoted(fs
->path
, file
, '\n');
4021 static void show_mode_change(FILE *file
, struct diff_filepair
*p
, int show_name
,
4022 const char *line_prefix
)
4024 if (p
->one
->mode
&& p
->two
->mode
&& p
->one
->mode
!= p
->two
->mode
) {
4025 fprintf(file
, "%s mode change %06o => %06o%c", line_prefix
, p
->one
->mode
,
4026 p
->two
->mode
, show_name
? ' ' : '\n');
4028 write_name_quoted(p
->two
->path
, file
, '\n');
4033 static void show_rename_copy(FILE *file
, const char *renamecopy
, struct diff_filepair
*p
,
4034 const char *line_prefix
)
4036 char *names
= pprint_rename(p
->one
->path
, p
->two
->path
);
4038 fprintf(file
, " %s %s (%d%%)\n", renamecopy
, names
, similarity_index(p
));
4040 show_mode_change(file
, p
, 0, line_prefix
);
4043 static void diff_summary(struct diff_options
*opt
, struct diff_filepair
*p
)
4045 FILE *file
= opt
->file
;
4046 char *line_prefix
= "";
4048 if (opt
->output_prefix
) {
4049 struct strbuf
*buf
= opt
->output_prefix(opt
, opt
->output_prefix_data
);
4050 line_prefix
= buf
->buf
;
4054 case DIFF_STATUS_DELETED
:
4055 fputs(line_prefix
, file
);
4056 show_file_mode_name(file
, "delete", p
->one
);
4058 case DIFF_STATUS_ADDED
:
4059 fputs(line_prefix
, file
);
4060 show_file_mode_name(file
, "create", p
->two
);
4062 case DIFF_STATUS_COPIED
:
4063 fputs(line_prefix
, file
);
4064 show_rename_copy(file
, "copy", p
, line_prefix
);
4066 case DIFF_STATUS_RENAMED
:
4067 fputs(line_prefix
, file
);
4068 show_rename_copy(file
, "rename", p
, line_prefix
);
4072 fprintf(file
, "%s rewrite ", line_prefix
);
4073 write_name_quoted(p
->two
->path
, file
, ' ');
4074 fprintf(file
, "(%d%%)\n", similarity_index(p
));
4076 show_mode_change(file
, p
, !p
->score
, line_prefix
);
4086 static int remove_space(char *line
, int len
)
4092 for (i
= 0; i
< len
; i
++)
4093 if (!isspace((c
= line
[i
])))
4099 static void patch_id_consume(void *priv
, char *line
, unsigned long len
)
4101 struct patch_id_t
*data
= priv
;
4104 /* Ignore line numbers when computing the SHA1 of the patch */
4105 if (!prefixcmp(line
, "@@ -"))
4108 new_len
= remove_space(line
, len
);
4110 git_SHA1_Update(data
->ctx
, line
, new_len
);
4111 data
->patchlen
+= new_len
;
4114 /* returns 0 upon success, and writes result into sha1 */
4115 static int diff_get_patch_id(struct diff_options
*options
, unsigned char *sha1
)
4117 struct diff_queue_struct
*q
= &diff_queued_diff
;
4120 struct patch_id_t data
;
4121 char buffer
[PATH_MAX
* 4 + 20];
4123 git_SHA1_Init(&ctx
);
4124 memset(&data
, 0, sizeof(struct patch_id_t
));
4127 for (i
= 0; i
< q
->nr
; i
++) {
4131 struct diff_filepair
*p
= q
->queue
[i
];
4134 memset(&xpp
, 0, sizeof(xpp
));
4135 memset(&xecfg
, 0, sizeof(xecfg
));
4137 return error("internal diff status error");
4138 if (p
->status
== DIFF_STATUS_UNKNOWN
)
4140 if (diff_unmodified_pair(p
))
4142 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
4143 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
4145 if (DIFF_PAIR_UNMERGED(p
))
4148 diff_fill_sha1_info(p
->one
);
4149 diff_fill_sha1_info(p
->two
);
4150 if (fill_mmfile(&mf1
, p
->one
) < 0 ||
4151 fill_mmfile(&mf2
, p
->two
) < 0)
4152 return error("unable to read files to diff");
4154 len1
= remove_space(p
->one
->path
, strlen(p
->one
->path
));
4155 len2
= remove_space(p
->two
->path
, strlen(p
->two
->path
));
4156 if (p
->one
->mode
== 0)
4157 len1
= snprintf(buffer
, sizeof(buffer
),
4158 "diff--gita/%.*sb/%.*s"
4165 len2
, p
->two
->path
);
4166 else if (p
->two
->mode
== 0)
4167 len1
= snprintf(buffer
, sizeof(buffer
),
4168 "diff--gita/%.*sb/%.*s"
4169 "deletedfilemode%06o"
4175 len1
, p
->one
->path
);
4177 len1
= snprintf(buffer
, sizeof(buffer
),
4178 "diff--gita/%.*sb/%.*s"
4184 len2
, p
->two
->path
);
4185 git_SHA1_Update(&ctx
, buffer
, len1
);
4187 if (diff_filespec_is_binary(p
->one
) ||
4188 diff_filespec_is_binary(p
->two
)) {
4189 git_SHA1_Update(&ctx
, sha1_to_hex(p
->one
->sha1
), 40);
4190 git_SHA1_Update(&ctx
, sha1_to_hex(p
->two
->sha1
), 40);
4197 xdi_diff_outf(&mf1
, &mf2
, patch_id_consume
, &data
,
4201 git_SHA1_Final(sha1
, &ctx
);
4205 int diff_flush_patch_id(struct diff_options
*options
, unsigned char *sha1
)
4207 struct diff_queue_struct
*q
= &diff_queued_diff
;
4209 int result
= diff_get_patch_id(options
, sha1
);
4211 for (i
= 0; i
< q
->nr
; i
++)
4212 diff_free_filepair(q
->queue
[i
]);
4215 DIFF_QUEUE_CLEAR(q
);
4220 static int is_summary_empty(const struct diff_queue_struct
*q
)
4224 for (i
= 0; i
< q
->nr
; i
++) {
4225 const struct diff_filepair
*p
= q
->queue
[i
];
4227 switch (p
->status
) {
4228 case DIFF_STATUS_DELETED
:
4229 case DIFF_STATUS_ADDED
:
4230 case DIFF_STATUS_COPIED
:
4231 case DIFF_STATUS_RENAMED
:
4236 if (p
->one
->mode
&& p
->two
->mode
&&
4237 p
->one
->mode
!= p
->two
->mode
)
4245 static const char rename_limit_warning
[] =
4246 "inexact rename detection was skipped due to too many files.";
4248 static const char degrade_cc_to_c_warning
[] =
4249 "only found copies from modified paths due to too many files.";
4251 static const char rename_limit_advice
[] =
4252 "you may want to set your %s variable to at least "
4253 "%d and retry the command.";
4255 void diff_warn_rename_limit(const char *varname
, int needed
, int degraded_cc
)
4258 warning(degrade_cc_to_c_warning
);
4260 warning(rename_limit_warning
);
4263 if (0 < needed
&& needed
< 32767)
4264 warning(rename_limit_advice
, varname
, needed
);
4267 void diff_flush(struct diff_options
*options
)
4269 struct diff_queue_struct
*q
= &diff_queued_diff
;
4270 int i
, output_format
= options
->output_format
;
4272 int dirstat_by_line
= 0;
4275 * Order: raw, stat, summary, patch
4276 * or: name/name-status/checkdiff (other bits clear)
4281 if (output_format
& (DIFF_FORMAT_RAW
|
4283 DIFF_FORMAT_NAME_STATUS
|
4284 DIFF_FORMAT_CHECKDIFF
)) {
4285 for (i
= 0; i
< q
->nr
; i
++) {
4286 struct diff_filepair
*p
= q
->queue
[i
];
4287 if (check_pair_status(p
))
4288 flush_one_pair(p
, options
);
4293 if (output_format
& DIFF_FORMAT_DIRSTAT
&& DIFF_OPT_TST(options
, DIRSTAT_BY_LINE
))
4294 dirstat_by_line
= 1;
4296 if (output_format
& (DIFF_FORMAT_DIFFSTAT
|DIFF_FORMAT_SHORTSTAT
|DIFF_FORMAT_NUMSTAT
) ||
4298 struct diffstat_t diffstat
;
4300 memset(&diffstat
, 0, sizeof(struct diffstat_t
));
4301 for (i
= 0; i
< q
->nr
; i
++) {
4302 struct diff_filepair
*p
= q
->queue
[i
];
4303 if (check_pair_status(p
))
4304 diff_flush_stat(p
, options
, &diffstat
);
4306 if (output_format
& DIFF_FORMAT_NUMSTAT
)
4307 show_numstat(&diffstat
, options
);
4308 if (output_format
& DIFF_FORMAT_DIFFSTAT
)
4309 show_stats(&diffstat
, options
);
4310 if (output_format
& DIFF_FORMAT_SHORTSTAT
)
4311 show_shortstats(&diffstat
, options
);
4312 if (output_format
& DIFF_FORMAT_DIRSTAT
)
4313 show_dirstat_by_line(&diffstat
, options
);
4314 free_diffstat_info(&diffstat
);
4317 if ((output_format
& DIFF_FORMAT_DIRSTAT
) && !dirstat_by_line
)
4318 show_dirstat(options
);
4320 if (output_format
& DIFF_FORMAT_SUMMARY
&& !is_summary_empty(q
)) {
4321 for (i
= 0; i
< q
->nr
; i
++) {
4322 diff_summary(options
, q
->queue
[i
]);
4327 if (output_format
& DIFF_FORMAT_NO_OUTPUT
&&
4328 DIFF_OPT_TST(options
, EXIT_WITH_STATUS
) &&
4329 DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
)) {
4331 * run diff_flush_patch for the exit status. setting
4332 * options->file to /dev/null should be safe, becaue we
4333 * aren't supposed to produce any output anyway.
4335 if (options
->close_file
)
4336 fclose(options
->file
);
4337 options
->file
= fopen("/dev/null", "w");
4339 die_errno("Could not open /dev/null");
4340 options
->close_file
= 1;
4341 for (i
= 0; i
< q
->nr
; i
++) {
4342 struct diff_filepair
*p
= q
->queue
[i
];
4343 if (check_pair_status(p
))
4344 diff_flush_patch(p
, options
);
4345 if (options
->found_changes
)
4350 if (output_format
& DIFF_FORMAT_PATCH
) {
4352 putc(options
->line_termination
, options
->file
);
4353 if (options
->stat_sep
) {
4354 /* attach patch instead of inline */
4355 fputs(options
->stat_sep
, options
->file
);
4359 for (i
= 0; i
< q
->nr
; i
++) {
4360 struct diff_filepair
*p
= q
->queue
[i
];
4361 if (check_pair_status(p
))
4362 diff_flush_patch(p
, options
);
4366 if (output_format
& DIFF_FORMAT_CALLBACK
)
4367 options
->format_callback(q
, options
, options
->format_callback_data
);
4369 for (i
= 0; i
< q
->nr
; i
++)
4370 diff_free_filepair(q
->queue
[i
]);
4373 DIFF_QUEUE_CLEAR(q
);
4374 if (options
->close_file
)
4375 fclose(options
->file
);
4378 * Report the content-level differences with HAS_CHANGES;
4379 * diff_addremove/diff_change does not set the bit when
4380 * DIFF_FROM_CONTENTS is in effect (e.g. with -w).
4382 if (DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
)) {
4383 if (options
->found_changes
)
4384 DIFF_OPT_SET(options
, HAS_CHANGES
);
4386 DIFF_OPT_CLR(options
, HAS_CHANGES
);
4390 static void diffcore_apply_filter(const char *filter
)
4393 struct diff_queue_struct
*q
= &diff_queued_diff
;
4394 struct diff_queue_struct outq
;
4395 DIFF_QUEUE_CLEAR(&outq
);
4400 if (strchr(filter
, DIFF_STATUS_FILTER_AON
)) {
4402 for (i
= found
= 0; !found
&& i
< q
->nr
; i
++) {
4403 struct diff_filepair
*p
= q
->queue
[i
];
4404 if (((p
->status
== DIFF_STATUS_MODIFIED
) &&
4406 strchr(filter
, DIFF_STATUS_FILTER_BROKEN
)) ||
4408 strchr(filter
, DIFF_STATUS_MODIFIED
)))) ||
4409 ((p
->status
!= DIFF_STATUS_MODIFIED
) &&
4410 strchr(filter
, p
->status
)))
4416 /* otherwise we will clear the whole queue
4417 * by copying the empty outq at the end of this
4418 * function, but first clear the current entries
4421 for (i
= 0; i
< q
->nr
; i
++)
4422 diff_free_filepair(q
->queue
[i
]);
4425 /* Only the matching ones */
4426 for (i
= 0; i
< q
->nr
; i
++) {
4427 struct diff_filepair
*p
= q
->queue
[i
];
4429 if (((p
->status
== DIFF_STATUS_MODIFIED
) &&
4431 strchr(filter
, DIFF_STATUS_FILTER_BROKEN
)) ||
4433 strchr(filter
, DIFF_STATUS_MODIFIED
)))) ||
4434 ((p
->status
!= DIFF_STATUS_MODIFIED
) &&
4435 strchr(filter
, p
->status
)))
4438 diff_free_filepair(p
);
4445 /* Check whether two filespecs with the same mode and size are identical */
4446 static int diff_filespec_is_identical(struct diff_filespec
*one
,
4447 struct diff_filespec
*two
)
4449 if (S_ISGITLINK(one
->mode
))
4451 if (diff_populate_filespec(one
, 0))
4453 if (diff_populate_filespec(two
, 0))
4455 return !memcmp(one
->data
, two
->data
, one
->size
);
4458 static void diffcore_skip_stat_unmatch(struct diff_options
*diffopt
)
4461 struct diff_queue_struct
*q
= &diff_queued_diff
;
4462 struct diff_queue_struct outq
;
4463 DIFF_QUEUE_CLEAR(&outq
);
4465 for (i
= 0; i
< q
->nr
; i
++) {
4466 struct diff_filepair
*p
= q
->queue
[i
];
4469 * 1. Entries that come from stat info dirtiness
4470 * always have both sides (iow, not create/delete),
4471 * one side of the object name is unknown, with
4472 * the same mode and size. Keep the ones that
4473 * do not match these criteria. They have real
4476 * 2. At this point, the file is known to be modified,
4477 * with the same mode and size, and the object
4478 * name of one side is unknown. Need to inspect
4479 * the identical contents.
4481 if (!DIFF_FILE_VALID(p
->one
) || /* (1) */
4482 !DIFF_FILE_VALID(p
->two
) ||
4483 (p
->one
->sha1_valid
&& p
->two
->sha1_valid
) ||
4484 (p
->one
->mode
!= p
->two
->mode
) ||
4485 diff_populate_filespec(p
->one
, 1) ||
4486 diff_populate_filespec(p
->two
, 1) ||
4487 (p
->one
->size
!= p
->two
->size
) ||
4488 !diff_filespec_is_identical(p
->one
, p
->two
)) /* (2) */
4492 * The caller can subtract 1 from skip_stat_unmatch
4493 * to determine how many paths were dirty only
4494 * due to stat info mismatch.
4496 if (!DIFF_OPT_TST(diffopt
, NO_INDEX
))
4497 diffopt
->skip_stat_unmatch
++;
4498 diff_free_filepair(p
);
4505 static int diffnamecmp(const void *a_
, const void *b_
)
4507 const struct diff_filepair
*a
= *((const struct diff_filepair
**)a_
);
4508 const struct diff_filepair
*b
= *((const struct diff_filepair
**)b_
);
4509 const char *name_a
, *name_b
;
4511 name_a
= a
->one
? a
->one
->path
: a
->two
->path
;
4512 name_b
= b
->one
? b
->one
->path
: b
->two
->path
;
4513 return strcmp(name_a
, name_b
);
4516 void diffcore_fix_diff_index(struct diff_options
*options
)
4518 struct diff_queue_struct
*q
= &diff_queued_diff
;
4519 qsort(q
->queue
, q
->nr
, sizeof(q
->queue
[0]), diffnamecmp
);
4522 void diffcore_std(struct diff_options
*options
)
4524 if (options
->skip_stat_unmatch
)
4525 diffcore_skip_stat_unmatch(options
);
4526 if (!options
->found_follow
) {
4527 /* See try_to_follow_renames() in tree-diff.c */
4528 if (options
->break_opt
!= -1)
4529 diffcore_break(options
->break_opt
);
4530 if (options
->detect_rename
)
4531 diffcore_rename(options
);
4532 if (options
->break_opt
!= -1)
4533 diffcore_merge_broken();
4535 if (options
->pickaxe
)
4536 diffcore_pickaxe(options
);
4537 if (options
->orderfile
)
4538 diffcore_order(options
->orderfile
);
4539 if (!options
->found_follow
)
4540 /* See try_to_follow_renames() in tree-diff.c */
4541 diff_resolve_rename_copy();
4542 diffcore_apply_filter(options
->filter
);
4544 if (diff_queued_diff
.nr
&& !DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
))
4545 DIFF_OPT_SET(options
, HAS_CHANGES
);
4547 DIFF_OPT_CLR(options
, HAS_CHANGES
);
4549 options
->found_follow
= 0;
4552 int diff_result_code(struct diff_options
*opt
, int status
)
4556 diff_warn_rename_limit("diff.renamelimit",
4557 opt
->needed_rename_limit
,
4558 opt
->degraded_cc_to_c
);
4559 if (!DIFF_OPT_TST(opt
, EXIT_WITH_STATUS
) &&
4560 !(opt
->output_format
& DIFF_FORMAT_CHECKDIFF
))
4562 if (DIFF_OPT_TST(opt
, EXIT_WITH_STATUS
) &&
4563 DIFF_OPT_TST(opt
, HAS_CHANGES
))
4565 if ((opt
->output_format
& DIFF_FORMAT_CHECKDIFF
) &&
4566 DIFF_OPT_TST(opt
, CHECK_FAILED
))
4571 int diff_can_quit_early(struct diff_options
*opt
)
4573 return (DIFF_OPT_TST(opt
, QUICK
) &&
4575 DIFF_OPT_TST(opt
, HAS_CHANGES
));
4579 * Shall changes to this submodule be ignored?
4581 * Submodule changes can be configured to be ignored separately for each path,
4582 * but that configuration can be overridden from the command line.
4584 static int is_submodule_ignored(const char *path
, struct diff_options
*options
)
4587 unsigned orig_flags
= options
->flags
;
4588 if (!DIFF_OPT_TST(options
, OVERRIDE_SUBMODULE_CONFIG
))
4589 set_diffopt_flags_from_submodule_config(options
, path
);
4590 if (DIFF_OPT_TST(options
, IGNORE_SUBMODULES
))
4592 options
->flags
= orig_flags
;
4596 void diff_addremove(struct diff_options
*options
,
4597 int addremove
, unsigned mode
,
4598 const unsigned char *sha1
,
4599 const char *concatpath
, unsigned dirty_submodule
)
4601 struct diff_filespec
*one
, *two
;
4603 if (S_ISGITLINK(mode
) && is_submodule_ignored(concatpath
, options
))
4606 /* This may look odd, but it is a preparation for
4607 * feeding "there are unchanged files which should
4608 * not produce diffs, but when you are doing copy
4609 * detection you would need them, so here they are"
4610 * entries to the diff-core. They will be prefixed
4611 * with something like '=' or '*' (I haven't decided
4612 * which but should not make any difference).
4613 * Feeding the same new and old to diff_change()
4614 * also has the same effect.
4615 * Before the final output happens, they are pruned after
4616 * merged into rename/copy pairs as appropriate.
4618 if (DIFF_OPT_TST(options
, REVERSE_DIFF
))
4619 addremove
= (addremove
== '+' ? '-' :
4620 addremove
== '-' ? '+' : addremove
);
4622 if (options
->prefix
&&
4623 strncmp(concatpath
, options
->prefix
, options
->prefix_length
))
4626 one
= alloc_filespec(concatpath
);
4627 two
= alloc_filespec(concatpath
);
4629 if (addremove
!= '+')
4630 fill_filespec(one
, sha1
, mode
);
4631 if (addremove
!= '-') {
4632 fill_filespec(two
, sha1
, mode
);
4633 two
->dirty_submodule
= dirty_submodule
;
4636 diff_queue(&diff_queued_diff
, one
, two
);
4637 if (!DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
))
4638 DIFF_OPT_SET(options
, HAS_CHANGES
);
4641 void diff_change(struct diff_options
*options
,
4642 unsigned old_mode
, unsigned new_mode
,
4643 const unsigned char *old_sha1
,
4644 const unsigned char *new_sha1
,
4645 const char *concatpath
,
4646 unsigned old_dirty_submodule
, unsigned new_dirty_submodule
)
4648 struct diff_filespec
*one
, *two
;
4650 if (S_ISGITLINK(old_mode
) && S_ISGITLINK(new_mode
) &&
4651 is_submodule_ignored(concatpath
, options
))
4654 if (DIFF_OPT_TST(options
, REVERSE_DIFF
)) {
4656 const unsigned char *tmp_c
;
4657 tmp
= old_mode
; old_mode
= new_mode
; new_mode
= tmp
;
4658 tmp_c
= old_sha1
; old_sha1
= new_sha1
; new_sha1
= tmp_c
;
4659 tmp
= old_dirty_submodule
; old_dirty_submodule
= new_dirty_submodule
;
4660 new_dirty_submodule
= tmp
;
4663 if (options
->prefix
&&
4664 strncmp(concatpath
, options
->prefix
, options
->prefix_length
))
4667 one
= alloc_filespec(concatpath
);
4668 two
= alloc_filespec(concatpath
);
4669 fill_filespec(one
, old_sha1
, old_mode
);
4670 fill_filespec(two
, new_sha1
, new_mode
);
4671 one
->dirty_submodule
= old_dirty_submodule
;
4672 two
->dirty_submodule
= new_dirty_submodule
;
4674 diff_queue(&diff_queued_diff
, one
, two
);
4675 if (!DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
))
4676 DIFF_OPT_SET(options
, HAS_CHANGES
);
4679 struct diff_filepair
*diff_unmerge(struct diff_options
*options
, const char *path
)
4681 struct diff_filepair
*pair
;
4682 struct diff_filespec
*one
, *two
;
4684 if (options
->prefix
&&
4685 strncmp(path
, options
->prefix
, options
->prefix_length
))
4688 one
= alloc_filespec(path
);
4689 two
= alloc_filespec(path
);
4690 pair
= diff_queue(&diff_queued_diff
, one
, two
);
4691 pair
->is_unmerged
= 1;
4695 static char *run_textconv(const char *pgm
, struct diff_filespec
*spec
,
4698 struct diff_tempfile
*temp
;
4699 const char *argv
[3];
4700 const char **arg
= argv
;
4701 struct child_process child
;
4702 struct strbuf buf
= STRBUF_INIT
;
4705 temp
= prepare_temp_file(spec
->path
, spec
);
4707 *arg
++ = temp
->name
;
4710 memset(&child
, 0, sizeof(child
));
4711 child
.use_shell
= 1;
4714 if (start_command(&child
)) {
4719 if (strbuf_read(&buf
, child
.out
, 0) < 0)
4720 err
= error("error reading from textconv command '%s'", pgm
);
4723 if (finish_command(&child
) || err
) {
4724 strbuf_release(&buf
);
4730 return strbuf_detach(&buf
, outsize
);
4733 size_t fill_textconv(struct userdiff_driver
*driver
,
4734 struct diff_filespec
*df
,
4739 if (!driver
|| !driver
->textconv
) {
4740 if (!DIFF_FILE_VALID(df
)) {
4744 if (diff_populate_filespec(df
, 0))
4745 die("unable to read files to diff");
4750 if (driver
->textconv_cache
&& df
->sha1_valid
) {
4751 *outbuf
= notes_cache_get(driver
->textconv_cache
, df
->sha1
,
4757 *outbuf
= run_textconv(driver
->textconv
, df
, &size
);
4759 die("unable to read files to diff");
4761 if (driver
->textconv_cache
&& df
->sha1_valid
) {
4762 /* ignore errors, as we might be in a readonly repository */
4763 notes_cache_put(driver
->textconv_cache
, df
->sha1
, *outbuf
,
4766 * we could save up changes and flush them all at the end,
4767 * but we would need an extra call after all diffing is done.
4768 * Since generating a cache entry is the slow path anyway,
4769 * this extra overhead probably isn't a big deal.
4771 notes_cache_write(driver
->textconv_cache
);