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 struct diff_options default_diff_options
;
36 static char diff_colors
[][COLOR_MAXLEN
] = {
38 GIT_COLOR_NORMAL
, /* PLAIN */
39 GIT_COLOR_BOLD
, /* METAINFO */
40 GIT_COLOR_CYAN
, /* FRAGINFO */
41 GIT_COLOR_RED
, /* OLD */
42 GIT_COLOR_GREEN
, /* NEW */
43 GIT_COLOR_YELLOW
, /* COMMIT */
44 GIT_COLOR_BG_RED
, /* WHITESPACE */
45 GIT_COLOR_NORMAL
, /* FUNCINFO */
48 static int parse_diff_color_slot(const char *var
, int ofs
)
50 if (!strcasecmp(var
+ofs
, "plain"))
52 if (!strcasecmp(var
+ofs
, "meta"))
54 if (!strcasecmp(var
+ofs
, "frag"))
56 if (!strcasecmp(var
+ofs
, "old"))
58 if (!strcasecmp(var
+ofs
, "new"))
60 if (!strcasecmp(var
+ofs
, "commit"))
62 if (!strcasecmp(var
+ofs
, "whitespace"))
63 return DIFF_WHITESPACE
;
64 if (!strcasecmp(var
+ofs
, "func"))
69 static int git_config_rename(const char *var
, const char *value
)
72 return DIFF_DETECT_RENAME
;
73 if (!strcasecmp(value
, "copies") || !strcasecmp(value
, "copy"))
74 return DIFF_DETECT_COPY
;
75 return git_config_bool(var
,value
) ? DIFF_DETECT_RENAME
: 0;
79 * These are to give UI layer defaults.
80 * The core-level commands such as git-diff-files should
81 * never be affected by the setting of diff.renames
82 * the user happens to have in the configuration file.
84 int git_diff_ui_config(const char *var
, const char *value
, void *cb
)
86 if (!strcmp(var
, "diff.color") || !strcmp(var
, "color.diff")) {
87 diff_use_color_default
= git_config_colorbool(var
, value
, -1);
90 if (!strcmp(var
, "diff.renames")) {
91 diff_detect_rename_default
= git_config_rename(var
, value
);
94 if (!strcmp(var
, "diff.autorefreshindex")) {
95 diff_auto_refresh_index
= git_config_bool(var
, value
);
98 if (!strcmp(var
, "diff.mnemonicprefix")) {
99 diff_mnemonic_prefix
= git_config_bool(var
, value
);
102 if (!strcmp(var
, "diff.noprefix")) {
103 diff_no_prefix
= git_config_bool(var
, value
);
106 if (!strcmp(var
, "diff.external"))
107 return git_config_string(&external_diff_cmd_cfg
, var
, value
);
108 if (!strcmp(var
, "diff.wordregex"))
109 return git_config_string(&diff_word_regex_cfg
, var
, value
);
111 if (!strcmp(var
, "diff.ignoresubmodules"))
112 handle_ignore_submodules_arg(&default_diff_options
, value
);
114 return git_diff_basic_config(var
, value
, cb
);
117 int git_diff_basic_config(const char *var
, const char *value
, void *cb
)
119 if (!strcmp(var
, "diff.renamelimit")) {
120 diff_rename_limit_default
= git_config_int(var
, value
);
124 switch (userdiff_config(var
, value
)) {
130 if (!prefixcmp(var
, "diff.color.") || !prefixcmp(var
, "color.diff.")) {
131 int slot
= parse_diff_color_slot(var
, 11);
135 return config_error_nonbool(var
);
136 color_parse(value
, var
, diff_colors
[slot
]);
140 /* like GNU diff's --suppress-blank-empty option */
141 if (!strcmp(var
, "diff.suppressblankempty") ||
142 /* for backwards compatibility */
143 !strcmp(var
, "diff.suppress-blank-empty")) {
144 diff_suppress_blank_empty
= git_config_bool(var
, value
);
148 if (!prefixcmp(var
, "submodule."))
149 return parse_submodule_config_option(var
, value
);
151 return git_color_default_config(var
, value
, cb
);
154 static char *quote_two(const char *one
, const char *two
)
156 int need_one
= quote_c_style(one
, NULL
, NULL
, 1);
157 int need_two
= quote_c_style(two
, NULL
, NULL
, 1);
158 struct strbuf res
= STRBUF_INIT
;
160 if (need_one
+ need_two
) {
161 strbuf_addch(&res
, '"');
162 quote_c_style(one
, &res
, NULL
, 1);
163 quote_c_style(two
, &res
, NULL
, 1);
164 strbuf_addch(&res
, '"');
166 strbuf_addstr(&res
, one
);
167 strbuf_addstr(&res
, two
);
169 return strbuf_detach(&res
, NULL
);
172 static const char *external_diff(void)
174 static const char *external_diff_cmd
= NULL
;
175 static int done_preparing
= 0;
178 return external_diff_cmd
;
179 external_diff_cmd
= getenv("GIT_EXTERNAL_DIFF");
180 if (!external_diff_cmd
)
181 external_diff_cmd
= external_diff_cmd_cfg
;
183 return external_diff_cmd
;
186 static struct diff_tempfile
{
187 const char *name
; /* filename external diff should read from */
190 char tmp_path
[PATH_MAX
];
193 typedef unsigned long (*sane_truncate_fn
)(char *line
, unsigned long len
);
195 struct emit_callback
{
198 int blank_at_eof_in_preimage
;
199 int blank_at_eof_in_postimage
;
201 int lno_in_postimage
;
202 sane_truncate_fn truncate
;
203 const char **label_path
;
204 struct diff_words_data
*diff_words
;
205 struct diff_options
*opt
;
207 struct strbuf
*header
;
210 static int count_lines(const char *data
, int size
)
212 int count
, ch
, completely_empty
= 1, nl_just_seen
= 0;
219 completely_empty
= 0;
223 completely_empty
= 0;
226 if (completely_empty
)
229 count
++; /* no trailing newline */
233 static int fill_mmfile(mmfile_t
*mf
, struct diff_filespec
*one
)
235 if (!DIFF_FILE_VALID(one
)) {
236 mf
->ptr
= (char *)""; /* does not matter */
240 else if (diff_populate_filespec(one
, 0))
244 mf
->size
= one
->size
;
248 /* like fill_mmfile, but only for size, so we can avoid retrieving blob */
249 static unsigned long diff_filespec_size(struct diff_filespec
*one
)
251 if (!DIFF_FILE_VALID(one
))
253 diff_populate_filespec(one
, 1);
257 static int count_trailing_blank(mmfile_t
*mf
, unsigned ws_rule
)
260 long size
= mf
->size
;
265 ptr
+= size
- 1; /* pointing at the very end */
267 ; /* incomplete line */
269 ptr
--; /* skip the last LF */
270 while (mf
->ptr
< ptr
) {
272 for (prev_eol
= ptr
; mf
->ptr
<= prev_eol
; prev_eol
--)
273 if (*prev_eol
== '\n')
275 if (!ws_blank_line(prev_eol
+ 1, ptr
- prev_eol
, ws_rule
))
283 static void check_blank_at_eof(mmfile_t
*mf1
, mmfile_t
*mf2
,
284 struct emit_callback
*ecbdata
)
287 unsigned ws_rule
= ecbdata
->ws_rule
;
288 l1
= count_trailing_blank(mf1
, ws_rule
);
289 l2
= count_trailing_blank(mf2
, ws_rule
);
291 ecbdata
->blank_at_eof_in_preimage
= 0;
292 ecbdata
->blank_at_eof_in_postimage
= 0;
295 at
= count_lines(mf1
->ptr
, mf1
->size
);
296 ecbdata
->blank_at_eof_in_preimage
= (at
- l1
) + 1;
298 at
= count_lines(mf2
->ptr
, mf2
->size
);
299 ecbdata
->blank_at_eof_in_postimage
= (at
- l2
) + 1;
302 static void emit_line_0(struct diff_options
*o
, const char *set
, const char *reset
,
303 int first
, const char *line
, int len
)
305 int has_trailing_newline
, has_trailing_carriage_return
;
307 FILE *file
= o
->file
;
309 if (o
->output_prefix
) {
310 struct strbuf
*msg
= NULL
;
311 msg
= o
->output_prefix(o
, o
->output_prefix_data
);
313 fwrite(msg
->buf
, msg
->len
, 1, file
);
317 has_trailing_newline
= (first
== '\n');
318 has_trailing_carriage_return
= (!has_trailing_newline
&&
320 nofirst
= has_trailing_newline
|| has_trailing_carriage_return
;
322 has_trailing_newline
= (len
> 0 && line
[len
-1] == '\n');
323 if (has_trailing_newline
)
325 has_trailing_carriage_return
= (len
> 0 && line
[len
-1] == '\r');
326 if (has_trailing_carriage_return
)
331 if (len
|| !nofirst
) {
335 fwrite(line
, len
, 1, file
);
338 if (has_trailing_carriage_return
)
340 if (has_trailing_newline
)
344 static void emit_line(struct diff_options
*o
, const char *set
, const char *reset
,
345 const char *line
, int len
)
347 emit_line_0(o
, set
, reset
, line
[0], line
+1, len
-1);
350 static int new_blank_line_at_eof(struct emit_callback
*ecbdata
, const char *line
, int len
)
352 if (!((ecbdata
->ws_rule
& WS_BLANK_AT_EOF
) &&
353 ecbdata
->blank_at_eof_in_preimage
&&
354 ecbdata
->blank_at_eof_in_postimage
&&
355 ecbdata
->blank_at_eof_in_preimage
<= ecbdata
->lno_in_preimage
&&
356 ecbdata
->blank_at_eof_in_postimage
<= ecbdata
->lno_in_postimage
))
358 return ws_blank_line(line
, len
, ecbdata
->ws_rule
);
361 static void emit_add_line(const char *reset
,
362 struct emit_callback
*ecbdata
,
363 const char *line
, int len
)
365 const char *ws
= diff_get_color(ecbdata
->color_diff
, DIFF_WHITESPACE
);
366 const char *set
= diff_get_color(ecbdata
->color_diff
, DIFF_FILE_NEW
);
369 emit_line_0(ecbdata
->opt
, set
, reset
, '+', line
, len
);
370 else if (new_blank_line_at_eof(ecbdata
, line
, len
))
371 /* Blank line at EOF - paint '+' as well */
372 emit_line_0(ecbdata
->opt
, ws
, reset
, '+', line
, len
);
374 /* Emit just the prefix, then the rest. */
375 emit_line_0(ecbdata
->opt
, set
, reset
, '+', "", 0);
376 ws_check_emit(line
, len
, ecbdata
->ws_rule
,
377 ecbdata
->opt
->file
, set
, reset
, ws
);
381 static void emit_hunk_header(struct emit_callback
*ecbdata
,
382 const char *line
, int len
)
384 const char *plain
= diff_get_color(ecbdata
->color_diff
, DIFF_PLAIN
);
385 const char *frag
= diff_get_color(ecbdata
->color_diff
, DIFF_FRAGINFO
);
386 const char *func
= diff_get_color(ecbdata
->color_diff
, DIFF_FUNCINFO
);
387 const char *reset
= diff_get_color(ecbdata
->color_diff
, DIFF_RESET
);
388 static const char atat
[2] = { '@', '@' };
390 struct strbuf msgbuf
= STRBUF_INIT
;
395 * As a hunk header must begin with "@@ -<old>, +<new> @@",
396 * it always is at least 10 bytes long.
399 memcmp(line
, atat
, 2) ||
400 !(ep
= memmem(line
+ 2, len
- 2, atat
, 2))) {
401 emit_line(ecbdata
->opt
, plain
, reset
, line
, len
);
404 ep
+= 2; /* skip over @@ */
406 /* The hunk header in fraginfo color */
407 strbuf_add(&msgbuf
, frag
, strlen(frag
));
408 strbuf_add(&msgbuf
, line
, ep
- line
);
409 strbuf_add(&msgbuf
, reset
, strlen(reset
));
415 if (line
[len
- i
] == '\r' || line
[len
- i
] == '\n')
418 /* blank before the func header */
419 for (cp
= ep
; ep
- line
< len
; ep
++)
420 if (*ep
!= ' ' && *ep
!= '\t')
423 strbuf_add(&msgbuf
, plain
, strlen(plain
));
424 strbuf_add(&msgbuf
, cp
, ep
- cp
);
425 strbuf_add(&msgbuf
, reset
, strlen(reset
));
428 if (ep
< line
+ len
) {
429 strbuf_add(&msgbuf
, func
, strlen(func
));
430 strbuf_add(&msgbuf
, ep
, line
+ len
- ep
);
431 strbuf_add(&msgbuf
, reset
, strlen(reset
));
434 strbuf_add(&msgbuf
, line
+ len
, org_len
- len
);
435 emit_line(ecbdata
->opt
, "", "", msgbuf
.buf
, msgbuf
.len
);
436 strbuf_release(&msgbuf
);
439 static struct diff_tempfile
*claim_diff_tempfile(void) {
441 for (i
= 0; i
< ARRAY_SIZE(diff_temp
); i
++)
442 if (!diff_temp
[i
].name
)
443 return diff_temp
+ i
;
444 die("BUG: diff is failing to clean up its tempfiles");
447 static int remove_tempfile_installed
;
449 static void remove_tempfile(void)
452 for (i
= 0; i
< ARRAY_SIZE(diff_temp
); i
++) {
453 if (diff_temp
[i
].name
== diff_temp
[i
].tmp_path
)
454 unlink_or_warn(diff_temp
[i
].name
);
455 diff_temp
[i
].name
= NULL
;
459 static void remove_tempfile_on_signal(int signo
)
466 static void print_line_count(FILE *file
, int count
)
470 fprintf(file
, "0,0");
476 fprintf(file
, "1,%d", count
);
481 static void emit_rewrite_lines(struct emit_callback
*ecb
,
482 int prefix
, const char *data
, int size
)
484 const char *endp
= NULL
;
485 static const char *nneof
= " No newline at end of file\n";
486 const char *old
= diff_get_color(ecb
->color_diff
, DIFF_FILE_OLD
);
487 const char *reset
= diff_get_color(ecb
->color_diff
, DIFF_RESET
);
492 endp
= memchr(data
, '\n', size
);
493 len
= endp
? (endp
- data
+ 1) : size
;
495 ecb
->lno_in_preimage
++;
496 emit_line_0(ecb
->opt
, old
, reset
, '-',
499 ecb
->lno_in_postimage
++;
500 emit_add_line(reset
, ecb
, data
, len
);
506 const char *plain
= diff_get_color(ecb
->color_diff
,
508 emit_line_0(ecb
->opt
, plain
, reset
, '\\',
509 nneof
, strlen(nneof
));
513 static void emit_rewrite_diff(const char *name_a
,
515 struct diff_filespec
*one
,
516 struct diff_filespec
*two
,
517 struct userdiff_driver
*textconv_one
,
518 struct userdiff_driver
*textconv_two
,
519 struct diff_options
*o
)
522 int color_diff
= DIFF_OPT_TST(o
, COLOR_DIFF
);
523 const char *name_a_tab
, *name_b_tab
;
524 const char *metainfo
= diff_get_color(color_diff
, DIFF_METAINFO
);
525 const char *fraginfo
= diff_get_color(color_diff
, DIFF_FRAGINFO
);
526 const char *reset
= diff_get_color(color_diff
, DIFF_RESET
);
527 static struct strbuf a_name
= STRBUF_INIT
, b_name
= STRBUF_INIT
;
528 const char *a_prefix
, *b_prefix
;
529 char *data_one
, *data_two
;
530 size_t size_one
, size_two
;
531 struct emit_callback ecbdata
;
532 char *line_prefix
= "";
533 struct strbuf
*msgbuf
;
535 if (o
&& o
->output_prefix
) {
536 msgbuf
= o
->output_prefix(o
, o
->output_prefix_data
);
537 line_prefix
= msgbuf
->buf
;
540 if (diff_mnemonic_prefix
&& DIFF_OPT_TST(o
, REVERSE_DIFF
)) {
541 a_prefix
= o
->b_prefix
;
542 b_prefix
= o
->a_prefix
;
544 a_prefix
= o
->a_prefix
;
545 b_prefix
= o
->b_prefix
;
548 name_a
+= (*name_a
== '/');
549 name_b
+= (*name_b
== '/');
550 name_a_tab
= strchr(name_a
, ' ') ? "\t" : "";
551 name_b_tab
= strchr(name_b
, ' ') ? "\t" : "";
553 strbuf_reset(&a_name
);
554 strbuf_reset(&b_name
);
555 quote_two_c_style(&a_name
, a_prefix
, name_a
, 0);
556 quote_two_c_style(&b_name
, b_prefix
, name_b
, 0);
558 size_one
= fill_textconv(textconv_one
, one
, &data_one
);
559 size_two
= fill_textconv(textconv_two
, two
, &data_two
);
561 memset(&ecbdata
, 0, sizeof(ecbdata
));
562 ecbdata
.color_diff
= color_diff
;
563 ecbdata
.found_changesp
= &o
->found_changes
;
564 ecbdata
.ws_rule
= whitespace_rule(name_b
? name_b
: name_a
);
566 if (ecbdata
.ws_rule
& WS_BLANK_AT_EOF
) {
568 mf1
.ptr
= (char *)data_one
;
569 mf2
.ptr
= (char *)data_two
;
572 check_blank_at_eof(&mf1
, &mf2
, &ecbdata
);
574 ecbdata
.lno_in_preimage
= 1;
575 ecbdata
.lno_in_postimage
= 1;
577 lc_a
= count_lines(data_one
, size_one
);
578 lc_b
= count_lines(data_two
, size_two
);
580 "%s%s--- %s%s%s\n%s%s+++ %s%s%s\n%s%s@@ -",
581 line_prefix
, metainfo
, a_name
.buf
, name_a_tab
, reset
,
582 line_prefix
, metainfo
, b_name
.buf
, name_b_tab
, reset
,
583 line_prefix
, fraginfo
);
584 if (!o
->irreversible_delete
)
585 print_line_count(o
->file
, lc_a
);
587 fprintf(o
->file
, "?,?");
588 fprintf(o
->file
, " +");
589 print_line_count(o
->file
, lc_b
);
590 fprintf(o
->file
, " @@%s\n", reset
);
591 if (lc_a
&& !o
->irreversible_delete
)
592 emit_rewrite_lines(&ecbdata
, '-', data_one
, size_one
);
594 emit_rewrite_lines(&ecbdata
, '+', data_two
, size_two
);
596 free((char *)data_one
);
598 free((char *)data_two
);
601 struct diff_words_buffer
{
604 struct diff_words_orig
{
605 const char *begin
, *end
;
607 int orig_nr
, orig_alloc
;
610 static void diff_words_append(char *line
, unsigned long len
,
611 struct diff_words_buffer
*buffer
)
613 ALLOC_GROW(buffer
->text
.ptr
, buffer
->text
.size
+ len
, buffer
->alloc
);
616 memcpy(buffer
->text
.ptr
+ buffer
->text
.size
, line
, len
);
617 buffer
->text
.size
+= len
;
618 buffer
->text
.ptr
[buffer
->text
.size
] = '\0';
621 struct diff_words_style_elem
{
624 const char *color
; /* NULL; filled in by the setup code if
625 * color is enabled */
628 struct diff_words_style
{
629 enum diff_words_type type
;
630 struct diff_words_style_elem
new, old
, ctx
;
634 static struct diff_words_style diff_words_styles
[] = {
635 { DIFF_WORDS_PORCELAIN
, {"+", "\n"}, {"-", "\n"}, {" ", "\n"}, "~\n" },
636 { DIFF_WORDS_PLAIN
, {"{+", "+}"}, {"[-", "-]"}, {"", ""}, "\n" },
637 { DIFF_WORDS_COLOR
, {"", ""}, {"", ""}, {"", ""}, "\n" }
640 struct diff_words_data
{
641 struct diff_words_buffer minus
, plus
;
642 const char *current_plus
;
644 struct diff_options
*opt
;
646 enum diff_words_type type
;
647 struct diff_words_style
*style
;
650 static int fn_out_diff_words_write_helper(FILE *fp
,
651 struct diff_words_style_elem
*st_el
,
653 size_t count
, const char *buf
,
654 const char *line_prefix
)
659 char *p
= memchr(buf
, '\n', count
);
661 fputs(line_prefix
, fp
);
663 if (st_el
->color
&& fputs(st_el
->color
, fp
) < 0)
665 if (fputs(st_el
->prefix
, fp
) < 0 ||
666 fwrite(buf
, p
? p
- buf
: count
, 1, fp
) != 1 ||
667 fputs(st_el
->suffix
, fp
) < 0)
669 if (st_el
->color
&& *st_el
->color
670 && fputs(GIT_COLOR_RESET
, fp
) < 0)
675 if (fputs(newline
, fp
) < 0)
677 count
-= p
+ 1 - buf
;
685 * '--color-words' algorithm can be described as:
687 * 1. collect a the minus/plus lines of a diff hunk, divided into
688 * minus-lines and plus-lines;
690 * 2. break both minus-lines and plus-lines into words and
691 * place them into two mmfile_t with one word for each line;
693 * 3. use xdiff to run diff on the two mmfile_t to get the words level diff;
695 * And for the common parts of the both file, we output the plus side text.
696 * diff_words->current_plus is used to trace the current position of the plus file
697 * which printed. diff_words->last_minus is used to trace the last minus word
700 * For '--graph' to work with '--color-words', we need to output the graph prefix
701 * on each line of color words output. Generally, there are two conditions on
702 * which we should output the prefix.
704 * 1. diff_words->last_minus == 0 &&
705 * diff_words->current_plus == diff_words->plus.text.ptr
707 * that is: the plus text must start as a new line, and if there is no minus
708 * word printed, a graph prefix must be printed.
710 * 2. diff_words->current_plus > diff_words->plus.text.ptr &&
711 * *(diff_words->current_plus - 1) == '\n'
713 * that is: a graph prefix must be printed following a '\n'
715 static int color_words_output_graph_prefix(struct diff_words_data
*diff_words
)
717 if ((diff_words
->last_minus
== 0 &&
718 diff_words
->current_plus
== diff_words
->plus
.text
.ptr
) ||
719 (diff_words
->current_plus
> diff_words
->plus
.text
.ptr
&&
720 *(diff_words
->current_plus
- 1) == '\n')) {
727 static void fn_out_diff_words_aux(void *priv
, char *line
, unsigned long len
)
729 struct diff_words_data
*diff_words
= priv
;
730 struct diff_words_style
*style
= diff_words
->style
;
731 int minus_first
, minus_len
, plus_first
, plus_len
;
732 const char *minus_begin
, *minus_end
, *plus_begin
, *plus_end
;
733 struct diff_options
*opt
= diff_words
->opt
;
734 struct strbuf
*msgbuf
;
735 char *line_prefix
= "";
737 if (line
[0] != '@' || parse_hunk_header(line
, len
,
738 &minus_first
, &minus_len
, &plus_first
, &plus_len
))
742 if (opt
->output_prefix
) {
743 msgbuf
= opt
->output_prefix(opt
, opt
->output_prefix_data
);
744 line_prefix
= msgbuf
->buf
;
747 /* POSIX requires that first be decremented by one if len == 0... */
749 minus_begin
= diff_words
->minus
.orig
[minus_first
].begin
;
751 diff_words
->minus
.orig
[minus_first
+ minus_len
- 1].end
;
753 minus_begin
= minus_end
=
754 diff_words
->minus
.orig
[minus_first
].end
;
757 plus_begin
= diff_words
->plus
.orig
[plus_first
].begin
;
758 plus_end
= diff_words
->plus
.orig
[plus_first
+ plus_len
- 1].end
;
760 plus_begin
= plus_end
= diff_words
->plus
.orig
[plus_first
].end
;
762 if (color_words_output_graph_prefix(diff_words
)) {
763 fputs(line_prefix
, diff_words
->opt
->file
);
765 if (diff_words
->current_plus
!= plus_begin
) {
766 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
767 &style
->ctx
, style
->newline
,
768 plus_begin
- diff_words
->current_plus
,
769 diff_words
->current_plus
, line_prefix
);
770 if (*(plus_begin
- 1) == '\n')
771 fputs(line_prefix
, diff_words
->opt
->file
);
773 if (minus_begin
!= minus_end
) {
774 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
775 &style
->old
, style
->newline
,
776 minus_end
- minus_begin
, minus_begin
,
779 if (plus_begin
!= plus_end
) {
780 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
781 &style
->new, style
->newline
,
782 plus_end
- plus_begin
, plus_begin
,
786 diff_words
->current_plus
= plus_end
;
787 diff_words
->last_minus
= minus_first
;
790 /* This function starts looking at *begin, and returns 0 iff a word was found. */
791 static int find_word_boundaries(mmfile_t
*buffer
, regex_t
*word_regex
,
792 int *begin
, int *end
)
794 if (word_regex
&& *begin
< buffer
->size
) {
796 if (!regexec(word_regex
, buffer
->ptr
+ *begin
, 1, match
, 0)) {
797 char *p
= memchr(buffer
->ptr
+ *begin
+ match
[0].rm_so
,
798 '\n', match
[0].rm_eo
- match
[0].rm_so
);
799 *end
= p
? p
- buffer
->ptr
: match
[0].rm_eo
+ *begin
;
800 *begin
+= match
[0].rm_so
;
801 return *begin
>= *end
;
806 /* find the next word */
807 while (*begin
< buffer
->size
&& isspace(buffer
->ptr
[*begin
]))
809 if (*begin
>= buffer
->size
)
812 /* find the end of the word */
814 while (*end
< buffer
->size
&& !isspace(buffer
->ptr
[*end
]))
821 * This function splits the words in buffer->text, stores the list with
822 * newline separator into out, and saves the offsets of the original words
825 static void diff_words_fill(struct diff_words_buffer
*buffer
, mmfile_t
*out
,
834 /* fake an empty "0th" word */
835 ALLOC_GROW(buffer
->orig
, 1, buffer
->orig_alloc
);
836 buffer
->orig
[0].begin
= buffer
->orig
[0].end
= buffer
->text
.ptr
;
839 for (i
= 0; i
< buffer
->text
.size
; i
++) {
840 if (find_word_boundaries(&buffer
->text
, word_regex
, &i
, &j
))
843 /* store original boundaries */
844 ALLOC_GROW(buffer
->orig
, buffer
->orig_nr
+ 1,
846 buffer
->orig
[buffer
->orig_nr
].begin
= buffer
->text
.ptr
+ i
;
847 buffer
->orig
[buffer
->orig_nr
].end
= buffer
->text
.ptr
+ j
;
851 ALLOC_GROW(out
->ptr
, out
->size
+ j
- i
+ 1, alloc
);
852 memcpy(out
->ptr
+ out
->size
, buffer
->text
.ptr
+ i
, j
- i
);
853 out
->ptr
[out
->size
+ j
- i
] = '\n';
854 out
->size
+= j
- i
+ 1;
860 /* this executes the word diff on the accumulated buffers */
861 static void diff_words_show(struct diff_words_data
*diff_words
)
865 mmfile_t minus
, plus
;
866 struct diff_words_style
*style
= diff_words
->style
;
868 struct diff_options
*opt
= diff_words
->opt
;
869 struct strbuf
*msgbuf
;
870 char *line_prefix
= "";
873 if (opt
->output_prefix
) {
874 msgbuf
= opt
->output_prefix(opt
, opt
->output_prefix_data
);
875 line_prefix
= msgbuf
->buf
;
878 /* special case: only removal */
879 if (!diff_words
->plus
.text
.size
) {
880 fputs(line_prefix
, diff_words
->opt
->file
);
881 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
882 &style
->old
, style
->newline
,
883 diff_words
->minus
.text
.size
,
884 diff_words
->minus
.text
.ptr
, line_prefix
);
885 diff_words
->minus
.text
.size
= 0;
889 diff_words
->current_plus
= diff_words
->plus
.text
.ptr
;
890 diff_words
->last_minus
= 0;
892 memset(&xpp
, 0, sizeof(xpp
));
893 memset(&xecfg
, 0, sizeof(xecfg
));
894 diff_words_fill(&diff_words
->minus
, &minus
, diff_words
->word_regex
);
895 diff_words_fill(&diff_words
->plus
, &plus
, diff_words
->word_regex
);
897 /* as only the hunk header will be parsed, we need a 0-context */
899 xdi_diff_outf(&minus
, &plus
, fn_out_diff_words_aux
, diff_words
,
903 if (diff_words
->current_plus
!= diff_words
->plus
.text
.ptr
+
904 diff_words
->plus
.text
.size
) {
905 if (color_words_output_graph_prefix(diff_words
))
906 fputs(line_prefix
, diff_words
->opt
->file
);
907 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
908 &style
->ctx
, style
->newline
,
909 diff_words
->plus
.text
.ptr
+ diff_words
->plus
.text
.size
910 - diff_words
->current_plus
, diff_words
->current_plus
,
913 diff_words
->minus
.text
.size
= diff_words
->plus
.text
.size
= 0;
916 /* In "color-words" mode, show word-diff of words accumulated in the buffer */
917 static void diff_words_flush(struct emit_callback
*ecbdata
)
919 if (ecbdata
->diff_words
->minus
.text
.size
||
920 ecbdata
->diff_words
->plus
.text
.size
)
921 diff_words_show(ecbdata
->diff_words
);
924 static void free_diff_words_data(struct emit_callback
*ecbdata
)
926 if (ecbdata
->diff_words
) {
927 diff_words_flush(ecbdata
);
928 free (ecbdata
->diff_words
->minus
.text
.ptr
);
929 free (ecbdata
->diff_words
->minus
.orig
);
930 free (ecbdata
->diff_words
->plus
.text
.ptr
);
931 free (ecbdata
->diff_words
->plus
.orig
);
932 if (ecbdata
->diff_words
->word_regex
) {
933 regfree(ecbdata
->diff_words
->word_regex
);
934 free(ecbdata
->diff_words
->word_regex
);
936 free(ecbdata
->diff_words
);
937 ecbdata
->diff_words
= NULL
;
941 const char *diff_get_color(int diff_use_color
, enum color_diff ix
)
944 return diff_colors
[ix
];
948 static unsigned long sane_truncate_line(struct emit_callback
*ecb
, char *line
, unsigned long len
)
955 return ecb
->truncate(line
, len
);
959 (void) utf8_width(&cp
, &l
);
961 break; /* truncated in the middle? */
966 static void find_lno(const char *line
, struct emit_callback
*ecbdata
)
969 ecbdata
->lno_in_preimage
= 0;
970 ecbdata
->lno_in_postimage
= 0;
971 p
= strchr(line
, '-');
973 return; /* cannot happen */
974 ecbdata
->lno_in_preimage
= strtol(p
+ 1, NULL
, 10);
977 return; /* cannot happen */
978 ecbdata
->lno_in_postimage
= strtol(p
+ 1, NULL
, 10);
981 static void fn_out_consume(void *priv
, char *line
, unsigned long len
)
983 struct emit_callback
*ecbdata
= priv
;
984 const char *meta
= diff_get_color(ecbdata
->color_diff
, DIFF_METAINFO
);
985 const char *plain
= diff_get_color(ecbdata
->color_diff
, DIFF_PLAIN
);
986 const char *reset
= diff_get_color(ecbdata
->color_diff
, DIFF_RESET
);
987 struct diff_options
*o
= ecbdata
->opt
;
988 char *line_prefix
= "";
989 struct strbuf
*msgbuf
;
991 if (o
&& o
->output_prefix
) {
992 msgbuf
= o
->output_prefix(o
, o
->output_prefix_data
);
993 line_prefix
= msgbuf
->buf
;
996 if (ecbdata
->header
) {
997 fprintf(ecbdata
->opt
->file
, "%s", ecbdata
->header
->buf
);
998 strbuf_reset(ecbdata
->header
);
999 ecbdata
->header
= NULL
;
1001 *(ecbdata
->found_changesp
) = 1;
1003 if (ecbdata
->label_path
[0]) {
1004 const char *name_a_tab
, *name_b_tab
;
1006 name_a_tab
= strchr(ecbdata
->label_path
[0], ' ') ? "\t" : "";
1007 name_b_tab
= strchr(ecbdata
->label_path
[1], ' ') ? "\t" : "";
1009 fprintf(ecbdata
->opt
->file
, "%s%s--- %s%s%s\n",
1010 line_prefix
, meta
, ecbdata
->label_path
[0], reset
, name_a_tab
);
1011 fprintf(ecbdata
->opt
->file
, "%s%s+++ %s%s%s\n",
1012 line_prefix
, meta
, ecbdata
->label_path
[1], reset
, name_b_tab
);
1013 ecbdata
->label_path
[0] = ecbdata
->label_path
[1] = NULL
;
1016 if (diff_suppress_blank_empty
1017 && len
== 2 && line
[0] == ' ' && line
[1] == '\n') {
1022 if (line
[0] == '@') {
1023 if (ecbdata
->diff_words
)
1024 diff_words_flush(ecbdata
);
1025 len
= sane_truncate_line(ecbdata
, line
, len
);
1026 find_lno(line
, ecbdata
);
1027 emit_hunk_header(ecbdata
, line
, len
);
1028 if (line
[len
-1] != '\n')
1029 putc('\n', ecbdata
->opt
->file
);
1034 emit_line(ecbdata
->opt
, reset
, reset
, line
, len
);
1035 if (ecbdata
->diff_words
1036 && ecbdata
->diff_words
->type
== DIFF_WORDS_PORCELAIN
)
1037 fputs("~\n", ecbdata
->opt
->file
);
1041 if (ecbdata
->diff_words
) {
1042 if (line
[0] == '-') {
1043 diff_words_append(line
, len
,
1044 &ecbdata
->diff_words
->minus
);
1046 } else if (line
[0] == '+') {
1047 diff_words_append(line
, len
,
1048 &ecbdata
->diff_words
->plus
);
1051 diff_words_flush(ecbdata
);
1052 if (ecbdata
->diff_words
->type
== DIFF_WORDS_PORCELAIN
) {
1053 emit_line(ecbdata
->opt
, plain
, reset
, line
, len
);
1054 fputs("~\n", ecbdata
->opt
->file
);
1056 /* don't print the prefix character */
1057 emit_line(ecbdata
->opt
, plain
, reset
, line
+1, len
-1);
1062 if (line
[0] != '+') {
1064 diff_get_color(ecbdata
->color_diff
,
1065 line
[0] == '-' ? DIFF_FILE_OLD
: DIFF_PLAIN
);
1066 ecbdata
->lno_in_preimage
++;
1068 ecbdata
->lno_in_postimage
++;
1069 emit_line(ecbdata
->opt
, color
, reset
, line
, len
);
1071 ecbdata
->lno_in_postimage
++;
1072 emit_add_line(reset
, ecbdata
, line
+ 1, len
- 1);
1076 static char *pprint_rename(const char *a
, const char *b
)
1078 const char *old
= a
;
1079 const char *new = b
;
1080 struct strbuf name
= STRBUF_INIT
;
1081 int pfx_length
, sfx_length
;
1082 int len_a
= strlen(a
);
1083 int len_b
= strlen(b
);
1084 int a_midlen
, b_midlen
;
1085 int qlen_a
= quote_c_style(a
, NULL
, NULL
, 0);
1086 int qlen_b
= quote_c_style(b
, NULL
, NULL
, 0);
1088 if (qlen_a
|| qlen_b
) {
1089 quote_c_style(a
, &name
, NULL
, 0);
1090 strbuf_addstr(&name
, " => ");
1091 quote_c_style(b
, &name
, NULL
, 0);
1092 return strbuf_detach(&name
, NULL
);
1095 /* Find common prefix */
1097 while (*old
&& *new && *old
== *new) {
1099 pfx_length
= old
- a
+ 1;
1104 /* Find common suffix */
1108 while (a
<= old
&& b
<= new && *old
== *new) {
1110 sfx_length
= len_a
- (old
- a
);
1116 * pfx{mid-a => mid-b}sfx
1117 * {pfx-a => pfx-b}sfx
1118 * pfx{sfx-a => sfx-b}
1121 a_midlen
= len_a
- pfx_length
- sfx_length
;
1122 b_midlen
= len_b
- pfx_length
- sfx_length
;
1128 strbuf_grow(&name
, pfx_length
+ a_midlen
+ b_midlen
+ sfx_length
+ 7);
1129 if (pfx_length
+ sfx_length
) {
1130 strbuf_add(&name
, a
, pfx_length
);
1131 strbuf_addch(&name
, '{');
1133 strbuf_add(&name
, a
+ pfx_length
, a_midlen
);
1134 strbuf_addstr(&name
, " => ");
1135 strbuf_add(&name
, b
+ pfx_length
, b_midlen
);
1136 if (pfx_length
+ sfx_length
) {
1137 strbuf_addch(&name
, '}');
1138 strbuf_add(&name
, a
+ len_a
- sfx_length
, sfx_length
);
1140 return strbuf_detach(&name
, NULL
);
1146 struct diffstat_file
{
1150 unsigned is_unmerged
:1;
1151 unsigned is_binary
:1;
1152 unsigned is_renamed
:1;
1153 uintmax_t added
, deleted
;
1157 static struct diffstat_file
*diffstat_add(struct diffstat_t
*diffstat
,
1161 struct diffstat_file
*x
;
1162 x
= xcalloc(sizeof (*x
), 1);
1163 if (diffstat
->nr
== diffstat
->alloc
) {
1164 diffstat
->alloc
= alloc_nr(diffstat
->alloc
);
1165 diffstat
->files
= xrealloc(diffstat
->files
,
1166 diffstat
->alloc
* sizeof(x
));
1168 diffstat
->files
[diffstat
->nr
++] = x
;
1170 x
->from_name
= xstrdup(name_a
);
1171 x
->name
= xstrdup(name_b
);
1175 x
->from_name
= NULL
;
1176 x
->name
= xstrdup(name_a
);
1181 static void diffstat_consume(void *priv
, char *line
, unsigned long len
)
1183 struct diffstat_t
*diffstat
= priv
;
1184 struct diffstat_file
*x
= diffstat
->files
[diffstat
->nr
- 1];
1188 else if (line
[0] == '-')
1192 const char mime_boundary_leader
[] = "------------";
1194 static int scale_linear(int it
, int width
, int max_change
)
1197 * make sure that at least one '-' is printed if there were deletions,
1198 * and likewise for '+'.
1202 return ((it
- 1) * (width
- 1) + max_change
- 1) / (max_change
- 1);
1205 static void show_name(FILE *file
,
1206 const char *prefix
, const char *name
, int len
)
1208 fprintf(file
, " %s%-*s |", prefix
, len
, name
);
1211 static void show_graph(FILE *file
, char ch
, int cnt
, const char *set
, const char *reset
)
1215 fprintf(file
, "%s", set
);
1218 fprintf(file
, "%s", reset
);
1221 static void fill_print_name(struct diffstat_file
*file
)
1225 if (file
->print_name
)
1228 if (!file
->is_renamed
) {
1229 struct strbuf buf
= STRBUF_INIT
;
1230 if (quote_c_style(file
->name
, &buf
, NULL
, 0)) {
1231 pname
= strbuf_detach(&buf
, NULL
);
1234 strbuf_release(&buf
);
1237 pname
= pprint_rename(file
->from_name
, file
->name
);
1239 file
->print_name
= pname
;
1242 static void show_stats(struct diffstat_t
*data
, struct diff_options
*options
)
1244 int i
, len
, add
, del
, adds
= 0, dels
= 0;
1245 uintmax_t max_change
= 0, max_len
= 0;
1246 int total_files
= data
->nr
;
1247 int width
, name_width
;
1248 const char *reset
, *add_c
, *del_c
;
1249 const char *line_prefix
= "";
1250 struct strbuf
*msg
= NULL
;
1255 if (options
->output_prefix
) {
1256 msg
= options
->output_prefix(options
, options
->output_prefix_data
);
1257 line_prefix
= msg
->buf
;
1260 width
= options
->stat_width
? options
->stat_width
: 80;
1261 name_width
= options
->stat_name_width
? options
->stat_name_width
: 50;
1263 /* Sanity: give at least 5 columns to the graph,
1264 * but leave at least 10 columns for the name.
1268 if (name_width
< 10)
1270 else if (width
< name_width
+ 15)
1271 name_width
= width
- 15;
1273 /* Find the longest filename and max number of changes */
1274 reset
= diff_get_color_opt(options
, DIFF_RESET
);
1275 add_c
= diff_get_color_opt(options
, DIFF_FILE_NEW
);
1276 del_c
= diff_get_color_opt(options
, DIFF_FILE_OLD
);
1278 for (i
= 0; i
< data
->nr
; i
++) {
1279 struct diffstat_file
*file
= data
->files
[i
];
1280 uintmax_t change
= file
->added
+ file
->deleted
;
1281 if (!data
->files
[i
]->is_renamed
&&
1285 fill_print_name(file
);
1286 len
= strlen(file
->print_name
);
1290 if (file
->is_binary
|| file
->is_unmerged
)
1292 if (max_change
< change
)
1293 max_change
= change
;
1296 /* Compute the width of the graph part;
1297 * 10 is for one blank at the beginning of the line plus
1298 * " | count " between the name and the graph.
1300 * From here on, name_width is the width of the name area,
1301 * and width is the width of the graph area.
1303 name_width
= (name_width
< max_len
) ? name_width
: max_len
;
1304 if (width
< (name_width
+ 10) + max_change
)
1305 width
= width
- (name_width
+ 10);
1309 for (i
= 0; i
< data
->nr
; i
++) {
1310 const char *prefix
= "";
1311 char *name
= data
->files
[i
]->print_name
;
1312 uintmax_t added
= data
->files
[i
]->added
;
1313 uintmax_t deleted
= data
->files
[i
]->deleted
;
1316 if (!data
->files
[i
]->is_renamed
&&
1317 (added
+ deleted
== 0)) {
1322 * "scale" the filename
1325 name_len
= strlen(name
);
1326 if (name_width
< name_len
) {
1330 name
+= name_len
- len
;
1331 slash
= strchr(name
, '/');
1336 if (data
->files
[i
]->is_binary
) {
1337 fprintf(options
->file
, "%s", line_prefix
);
1338 show_name(options
->file
, prefix
, name
, len
);
1339 fprintf(options
->file
, " Bin ");
1340 fprintf(options
->file
, "%s%"PRIuMAX
"%s",
1341 del_c
, deleted
, reset
);
1342 fprintf(options
->file
, " -> ");
1343 fprintf(options
->file
, "%s%"PRIuMAX
"%s",
1344 add_c
, added
, reset
);
1345 fprintf(options
->file
, " bytes");
1346 fprintf(options
->file
, "\n");
1349 else if (data
->files
[i
]->is_unmerged
) {
1350 fprintf(options
->file
, "%s", line_prefix
);
1351 show_name(options
->file
, prefix
, name
, len
);
1352 fprintf(options
->file
, " Unmerged\n");
1357 * scale the add/delete
1364 if (width
<= max_change
) {
1365 add
= scale_linear(add
, width
, max_change
);
1366 del
= scale_linear(del
, width
, max_change
);
1368 fprintf(options
->file
, "%s", line_prefix
);
1369 show_name(options
->file
, prefix
, name
, len
);
1370 fprintf(options
->file
, "%5"PRIuMAX
"%s", added
+ deleted
,
1371 added
+ deleted
? " " : "");
1372 show_graph(options
->file
, '+', add
, add_c
, reset
);
1373 show_graph(options
->file
, '-', del
, del_c
, reset
);
1374 fprintf(options
->file
, "\n");
1376 fprintf(options
->file
, "%s", line_prefix
);
1377 fprintf(options
->file
,
1378 " %d files changed, %d insertions(+), %d deletions(-)\n",
1379 total_files
, adds
, dels
);
1382 static void show_shortstats(struct diffstat_t
*data
, struct diff_options
*options
)
1384 int i
, adds
= 0, dels
= 0, total_files
= data
->nr
;
1389 for (i
= 0; i
< data
->nr
; i
++) {
1390 if (!data
->files
[i
]->is_binary
&&
1391 !data
->files
[i
]->is_unmerged
) {
1392 int added
= data
->files
[i
]->added
;
1393 int deleted
= data
->files
[i
]->deleted
;
1394 if (!data
->files
[i
]->is_renamed
&&
1395 (added
+ deleted
== 0)) {
1403 if (options
->output_prefix
) {
1404 struct strbuf
*msg
= NULL
;
1405 msg
= options
->output_prefix(options
,
1406 options
->output_prefix_data
);
1407 fprintf(options
->file
, "%s", msg
->buf
);
1409 fprintf(options
->file
, " %d files changed, %d insertions(+), %d deletions(-)\n",
1410 total_files
, adds
, dels
);
1413 static void show_numstat(struct diffstat_t
*data
, struct diff_options
*options
)
1420 for (i
= 0; i
< data
->nr
; i
++) {
1421 struct diffstat_file
*file
= data
->files
[i
];
1423 if (options
->output_prefix
) {
1424 struct strbuf
*msg
= NULL
;
1425 msg
= options
->output_prefix(options
,
1426 options
->output_prefix_data
);
1427 fprintf(options
->file
, "%s", msg
->buf
);
1430 if (file
->is_binary
)
1431 fprintf(options
->file
, "-\t-\t");
1433 fprintf(options
->file
,
1434 "%"PRIuMAX
"\t%"PRIuMAX
"\t",
1435 file
->added
, file
->deleted
);
1436 if (options
->line_termination
) {
1437 fill_print_name(file
);
1438 if (!file
->is_renamed
)
1439 write_name_quoted(file
->name
, options
->file
,
1440 options
->line_termination
);
1442 fputs(file
->print_name
, options
->file
);
1443 putc(options
->line_termination
, options
->file
);
1446 if (file
->is_renamed
) {
1447 putc('\0', options
->file
);
1448 write_name_quoted(file
->from_name
, options
->file
, '\0');
1450 write_name_quoted(file
->name
, options
->file
, '\0');
1455 struct dirstat_file
{
1457 unsigned long changed
;
1460 struct dirstat_dir
{
1461 struct dirstat_file
*files
;
1462 int alloc
, nr
, percent
, cumulative
;
1465 static long gather_dirstat(struct diff_options
*opt
, struct dirstat_dir
*dir
,
1466 unsigned long changed
, const char *base
, int baselen
)
1468 unsigned long this_dir
= 0;
1469 unsigned int sources
= 0;
1470 const char *line_prefix
= "";
1471 struct strbuf
*msg
= NULL
;
1473 if (opt
->output_prefix
) {
1474 msg
= opt
->output_prefix(opt
, opt
->output_prefix_data
);
1475 line_prefix
= msg
->buf
;
1479 struct dirstat_file
*f
= dir
->files
;
1480 int namelen
= strlen(f
->name
);
1484 if (namelen
< baselen
)
1486 if (memcmp(f
->name
, base
, baselen
))
1488 slash
= strchr(f
->name
+ baselen
, '/');
1490 int newbaselen
= slash
+ 1 - f
->name
;
1491 this = gather_dirstat(opt
, dir
, changed
, f
->name
, newbaselen
);
1503 * We don't report dirstat's for
1505 * - or cases where everything came from a single directory
1506 * under this directory (sources == 1).
1508 if (baselen
&& sources
!= 1) {
1509 int permille
= this_dir
* 1000 / changed
;
1511 int percent
= permille
/ 10;
1512 if (percent
>= dir
->percent
) {
1513 fprintf(opt
->file
, "%s%4d.%01d%% %.*s\n", line_prefix
,
1514 percent
, permille
% 10, baselen
, base
);
1515 if (!dir
->cumulative
)
1523 static int dirstat_compare(const void *_a
, const void *_b
)
1525 const struct dirstat_file
*a
= _a
;
1526 const struct dirstat_file
*b
= _b
;
1527 return strcmp(a
->name
, b
->name
);
1530 static void show_dirstat(struct diff_options
*options
)
1533 unsigned long changed
;
1534 struct dirstat_dir dir
;
1535 struct diff_queue_struct
*q
= &diff_queued_diff
;
1540 dir
.percent
= options
->dirstat_percent
;
1541 dir
.cumulative
= DIFF_OPT_TST(options
, DIRSTAT_CUMULATIVE
);
1544 for (i
= 0; i
< q
->nr
; i
++) {
1545 struct diff_filepair
*p
= q
->queue
[i
];
1547 unsigned long copied
, added
, damage
;
1548 int content_changed
;
1550 name
= p
->two
->path
? p
->two
->path
: p
->one
->path
;
1552 if (p
->one
->sha1_valid
&& p
->two
->sha1_valid
)
1553 content_changed
= hashcmp(p
->one
->sha1
, p
->two
->sha1
);
1555 content_changed
= 1;
1557 if (!content_changed
) {
1559 * The SHA1 has not changed, so pre-/post-content is
1560 * identical. We can therefore skip looking at the
1561 * file contents altogether.
1567 if (DIFF_OPT_TST(options
, DIRSTAT_BY_FILE
)) {
1569 * In --dirstat-by-file mode, we don't really need to
1570 * look at the actual file contents at all.
1571 * The fact that the SHA1 changed is enough for us to
1572 * add this file to the list of results
1573 * (with each file contributing equal damage).
1579 if (DIFF_FILE_VALID(p
->one
) && DIFF_FILE_VALID(p
->two
)) {
1580 diff_populate_filespec(p
->one
, 0);
1581 diff_populate_filespec(p
->two
, 0);
1582 diffcore_count_changes(p
->one
, p
->two
, NULL
, NULL
, 0,
1584 diff_free_filespec_data(p
->one
);
1585 diff_free_filespec_data(p
->two
);
1586 } else if (DIFF_FILE_VALID(p
->one
)) {
1587 diff_populate_filespec(p
->one
, 1);
1589 diff_free_filespec_data(p
->one
);
1590 } else if (DIFF_FILE_VALID(p
->two
)) {
1591 diff_populate_filespec(p
->two
, 1);
1593 added
= p
->two
->size
;
1594 diff_free_filespec_data(p
->two
);
1599 * Original minus copied is the removed material,
1600 * added is the new material. They are both damages
1601 * made to the preimage.
1602 * If the resulting damage is zero, we know that
1603 * diffcore_count_changes() considers the two entries to
1604 * be identical, but since content_changed is true, we
1605 * know that there must have been _some_ kind of change,
1606 * so we force all entries to have damage > 0.
1608 damage
= (p
->one
->size
- copied
) + added
;
1613 ALLOC_GROW(dir
.files
, dir
.nr
+ 1, dir
.alloc
);
1614 dir
.files
[dir
.nr
].name
= name
;
1615 dir
.files
[dir
.nr
].changed
= damage
;
1620 /* This can happen even with many files, if everything was renames */
1624 /* Show all directories with more than x% of the changes */
1625 qsort(dir
.files
, dir
.nr
, sizeof(dir
.files
[0]), dirstat_compare
);
1626 gather_dirstat(options
, &dir
, changed
, "", 0);
1629 static void free_diffstat_info(struct diffstat_t
*diffstat
)
1632 for (i
= 0; i
< diffstat
->nr
; i
++) {
1633 struct diffstat_file
*f
= diffstat
->files
[i
];
1634 if (f
->name
!= f
->print_name
)
1635 free(f
->print_name
);
1640 free(diffstat
->files
);
1643 struct checkdiff_t
{
1644 const char *filename
;
1646 int conflict_marker_size
;
1647 struct diff_options
*o
;
1652 static int is_conflict_marker(const char *line
, int marker_size
, unsigned long len
)
1657 if (len
< marker_size
+ 1)
1659 firstchar
= line
[0];
1660 switch (firstchar
) {
1661 case '=': case '>': case '<': case '|':
1666 for (cnt
= 1; cnt
< marker_size
; cnt
++)
1667 if (line
[cnt
] != firstchar
)
1669 /* line[1] thru line[marker_size-1] are same as firstchar */
1670 if (len
< marker_size
+ 1 || !isspace(line
[marker_size
]))
1675 static void checkdiff_consume(void *priv
, char *line
, unsigned long len
)
1677 struct checkdiff_t
*data
= priv
;
1678 int color_diff
= DIFF_OPT_TST(data
->o
, COLOR_DIFF
);
1679 int marker_size
= data
->conflict_marker_size
;
1680 const char *ws
= diff_get_color(color_diff
, DIFF_WHITESPACE
);
1681 const char *reset
= diff_get_color(color_diff
, DIFF_RESET
);
1682 const char *set
= diff_get_color(color_diff
, DIFF_FILE_NEW
);
1684 char *line_prefix
= "";
1685 struct strbuf
*msgbuf
;
1688 if (data
->o
->output_prefix
) {
1689 msgbuf
= data
->o
->output_prefix(data
->o
,
1690 data
->o
->output_prefix_data
);
1691 line_prefix
= msgbuf
->buf
;
1694 if (line
[0] == '+') {
1697 if (is_conflict_marker(line
+ 1, marker_size
, len
- 1)) {
1699 fprintf(data
->o
->file
,
1700 "%s%s:%d: leftover conflict marker\n",
1701 line_prefix
, data
->filename
, data
->lineno
);
1703 bad
= ws_check(line
+ 1, len
- 1, data
->ws_rule
);
1706 data
->status
|= bad
;
1707 err
= whitespace_error_string(bad
);
1708 fprintf(data
->o
->file
, "%s%s:%d: %s.\n",
1709 line_prefix
, data
->filename
, data
->lineno
, err
);
1711 emit_line(data
->o
, set
, reset
, line
, 1);
1712 ws_check_emit(line
+ 1, len
- 1, data
->ws_rule
,
1713 data
->o
->file
, set
, reset
, ws
);
1714 } else if (line
[0] == ' ') {
1716 } else if (line
[0] == '@') {
1717 char *plus
= strchr(line
, '+');
1719 data
->lineno
= strtol(plus
, NULL
, 10) - 1;
1721 die("invalid diff");
1725 static unsigned char *deflate_it(char *data
,
1727 unsigned long *result_size
)
1730 unsigned char *deflated
;
1733 memset(&stream
, 0, sizeof(stream
));
1734 deflateInit(&stream
, zlib_compression_level
);
1735 bound
= deflateBound(&stream
, size
);
1736 deflated
= xmalloc(bound
);
1737 stream
.next_out
= deflated
;
1738 stream
.avail_out
= bound
;
1740 stream
.next_in
= (unsigned char *)data
;
1741 stream
.avail_in
= size
;
1742 while (deflate(&stream
, Z_FINISH
) == Z_OK
)
1744 deflateEnd(&stream
);
1745 *result_size
= stream
.total_out
;
1749 static void emit_binary_diff_body(FILE *file
, mmfile_t
*one
, mmfile_t
*two
, char *prefix
)
1755 unsigned long orig_size
;
1756 unsigned long delta_size
;
1757 unsigned long deflate_size
;
1758 unsigned long data_size
;
1760 /* We could do deflated delta, or we could do just deflated two,
1761 * whichever is smaller.
1764 deflated
= deflate_it(two
->ptr
, two
->size
, &deflate_size
);
1765 if (one
->size
&& two
->size
) {
1766 delta
= diff_delta(one
->ptr
, one
->size
,
1767 two
->ptr
, two
->size
,
1768 &delta_size
, deflate_size
);
1770 void *to_free
= delta
;
1771 orig_size
= delta_size
;
1772 delta
= deflate_it(delta
, delta_size
, &delta_size
);
1777 if (delta
&& delta_size
< deflate_size
) {
1778 fprintf(file
, "%sdelta %lu\n", prefix
, orig_size
);
1781 data_size
= delta_size
;
1784 fprintf(file
, "%sliteral %lu\n", prefix
, two
->size
);
1787 data_size
= deflate_size
;
1790 /* emit data encoded in base85 */
1793 int bytes
= (52 < data_size
) ? 52 : data_size
;
1797 line
[0] = bytes
+ 'A' - 1;
1799 line
[0] = bytes
- 26 + 'a' - 1;
1800 encode_85(line
+ 1, cp
, bytes
);
1801 cp
= (char *) cp
+ bytes
;
1802 fprintf(file
, "%s", prefix
);
1806 fprintf(file
, "%s\n", prefix
);
1810 static void emit_binary_diff(FILE *file
, mmfile_t
*one
, mmfile_t
*two
, char *prefix
)
1812 fprintf(file
, "%sGIT binary patch\n", prefix
);
1813 emit_binary_diff_body(file
, one
, two
, prefix
);
1814 emit_binary_diff_body(file
, two
, one
, prefix
);
1817 static void diff_filespec_load_driver(struct diff_filespec
*one
)
1819 /* Use already-loaded driver */
1823 if (S_ISREG(one
->mode
))
1824 one
->driver
= userdiff_find_by_path(one
->path
);
1826 /* Fallback to default settings */
1828 one
->driver
= userdiff_find_by_name("default");
1831 int diff_filespec_is_binary(struct diff_filespec
*one
)
1833 if (one
->is_binary
== -1) {
1834 diff_filespec_load_driver(one
);
1835 if (one
->driver
->binary
!= -1)
1836 one
->is_binary
= one
->driver
->binary
;
1838 if (!one
->data
&& DIFF_FILE_VALID(one
))
1839 diff_populate_filespec(one
, 0);
1841 one
->is_binary
= buffer_is_binary(one
->data
,
1843 if (one
->is_binary
== -1)
1847 return one
->is_binary
;
1850 static const struct userdiff_funcname
*diff_funcname_pattern(struct diff_filespec
*one
)
1852 diff_filespec_load_driver(one
);
1853 return one
->driver
->funcname
.pattern
? &one
->driver
->funcname
: NULL
;
1856 static const char *userdiff_word_regex(struct diff_filespec
*one
)
1858 diff_filespec_load_driver(one
);
1859 return one
->driver
->word_regex
;
1862 void diff_set_mnemonic_prefix(struct diff_options
*options
, const char *a
, const char *b
)
1864 if (!options
->a_prefix
)
1865 options
->a_prefix
= a
;
1866 if (!options
->b_prefix
)
1867 options
->b_prefix
= b
;
1870 struct userdiff_driver
*get_textconv(struct diff_filespec
*one
)
1872 if (!DIFF_FILE_VALID(one
))
1875 diff_filespec_load_driver(one
);
1876 if (!one
->driver
->textconv
)
1879 if (one
->driver
->textconv_want_cache
&& !one
->driver
->textconv_cache
) {
1880 struct notes_cache
*c
= xmalloc(sizeof(*c
));
1881 struct strbuf name
= STRBUF_INIT
;
1883 strbuf_addf(&name
, "textconv/%s", one
->driver
->name
);
1884 notes_cache_init(c
, name
.buf
, one
->driver
->textconv
);
1885 one
->driver
->textconv_cache
= c
;
1891 static void builtin_diff(const char *name_a
,
1893 struct diff_filespec
*one
,
1894 struct diff_filespec
*two
,
1895 const char *xfrm_msg
,
1896 int must_show_header
,
1897 struct diff_options
*o
,
1898 int complete_rewrite
)
1902 char *a_one
, *b_two
;
1903 const char *set
= diff_get_color_opt(o
, DIFF_METAINFO
);
1904 const char *reset
= diff_get_color_opt(o
, DIFF_RESET
);
1905 const char *a_prefix
, *b_prefix
;
1906 struct userdiff_driver
*textconv_one
= NULL
;
1907 struct userdiff_driver
*textconv_two
= NULL
;
1908 struct strbuf header
= STRBUF_INIT
;
1909 struct strbuf
*msgbuf
;
1910 char *line_prefix
= "";
1912 if (o
->output_prefix
) {
1913 msgbuf
= o
->output_prefix(o
, o
->output_prefix_data
);
1914 line_prefix
= msgbuf
->buf
;
1917 if (DIFF_OPT_TST(o
, SUBMODULE_LOG
) &&
1918 (!one
->mode
|| S_ISGITLINK(one
->mode
)) &&
1919 (!two
->mode
|| S_ISGITLINK(two
->mode
))) {
1920 const char *del
= diff_get_color_opt(o
, DIFF_FILE_OLD
);
1921 const char *add
= diff_get_color_opt(o
, DIFF_FILE_NEW
);
1922 show_submodule_summary(o
->file
, one
? one
->path
: two
->path
,
1923 one
->sha1
, two
->sha1
, two
->dirty_submodule
,
1928 if (DIFF_OPT_TST(o
, ALLOW_TEXTCONV
)) {
1929 textconv_one
= get_textconv(one
);
1930 textconv_two
= get_textconv(two
);
1933 diff_set_mnemonic_prefix(o
, "a/", "b/");
1934 if (DIFF_OPT_TST(o
, REVERSE_DIFF
)) {
1935 a_prefix
= o
->b_prefix
;
1936 b_prefix
= o
->a_prefix
;
1938 a_prefix
= o
->a_prefix
;
1939 b_prefix
= o
->b_prefix
;
1942 /* Never use a non-valid filename anywhere if at all possible */
1943 name_a
= DIFF_FILE_VALID(one
) ? name_a
: name_b
;
1944 name_b
= DIFF_FILE_VALID(two
) ? name_b
: name_a
;
1946 a_one
= quote_two(a_prefix
, name_a
+ (*name_a
== '/'));
1947 b_two
= quote_two(b_prefix
, name_b
+ (*name_b
== '/'));
1948 lbl
[0] = DIFF_FILE_VALID(one
) ? a_one
: "/dev/null";
1949 lbl
[1] = DIFF_FILE_VALID(two
) ? b_two
: "/dev/null";
1950 strbuf_addf(&header
, "%s%sdiff --git %s %s%s\n", line_prefix
, set
, a_one
, b_two
, reset
);
1951 if (lbl
[0][0] == '/') {
1953 strbuf_addf(&header
, "%s%snew file mode %06o%s\n", line_prefix
, set
, two
->mode
, reset
);
1955 strbuf_addstr(&header
, xfrm_msg
);
1956 must_show_header
= 1;
1958 else if (lbl
[1][0] == '/') {
1959 strbuf_addf(&header
, "%s%sdeleted file mode %06o%s\n", line_prefix
, set
, one
->mode
, reset
);
1961 strbuf_addstr(&header
, xfrm_msg
);
1962 must_show_header
= 1;
1965 if (one
->mode
!= two
->mode
) {
1966 strbuf_addf(&header
, "%s%sold mode %06o%s\n", line_prefix
, set
, one
->mode
, reset
);
1967 strbuf_addf(&header
, "%s%snew mode %06o%s\n", line_prefix
, set
, two
->mode
, reset
);
1968 must_show_header
= 1;
1971 strbuf_addstr(&header
, xfrm_msg
);
1974 * we do not run diff between different kind
1977 if ((one
->mode
^ two
->mode
) & S_IFMT
)
1978 goto free_ab_and_return
;
1979 if (complete_rewrite
&&
1980 (textconv_one
|| !diff_filespec_is_binary(one
)) &&
1981 (textconv_two
|| !diff_filespec_is_binary(two
))) {
1982 fprintf(o
->file
, "%s", header
.buf
);
1983 strbuf_reset(&header
);
1984 emit_rewrite_diff(name_a
, name_b
, one
, two
,
1985 textconv_one
, textconv_two
, o
);
1986 o
->found_changes
= 1;
1987 goto free_ab_and_return
;
1991 if (o
->irreversible_delete
&& lbl
[1][0] == '/') {
1992 fprintf(o
->file
, "%s", header
.buf
);
1993 strbuf_reset(&header
);
1994 goto free_ab_and_return
;
1995 } else if (!DIFF_OPT_TST(o
, TEXT
) &&
1996 ( (!textconv_one
&& diff_filespec_is_binary(one
)) ||
1997 (!textconv_two
&& diff_filespec_is_binary(two
)) )) {
1998 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
1999 die("unable to read files to diff");
2000 /* Quite common confusing case */
2001 if (mf1
.size
== mf2
.size
&&
2002 !memcmp(mf1
.ptr
, mf2
.ptr
, mf1
.size
)) {
2003 if (must_show_header
)
2004 fprintf(o
->file
, "%s", header
.buf
);
2005 goto free_ab_and_return
;
2007 fprintf(o
->file
, "%s", header
.buf
);
2008 strbuf_reset(&header
);
2009 if (DIFF_OPT_TST(o
, BINARY
))
2010 emit_binary_diff(o
->file
, &mf1
, &mf2
, line_prefix
);
2012 fprintf(o
->file
, "%sBinary files %s and %s differ\n",
2013 line_prefix
, lbl
[0], lbl
[1]);
2014 o
->found_changes
= 1;
2016 /* Crazy xdl interfaces.. */
2017 const char *diffopts
= getenv("GIT_DIFF_OPTS");
2020 struct emit_callback ecbdata
;
2021 const struct userdiff_funcname
*pe
;
2023 if (!DIFF_XDL_TST(o
, WHITESPACE_FLAGS
) || must_show_header
) {
2024 fprintf(o
->file
, "%s", header
.buf
);
2025 strbuf_reset(&header
);
2028 mf1
.size
= fill_textconv(textconv_one
, one
, &mf1
.ptr
);
2029 mf2
.size
= fill_textconv(textconv_two
, two
, &mf2
.ptr
);
2031 pe
= diff_funcname_pattern(one
);
2033 pe
= diff_funcname_pattern(two
);
2035 memset(&xpp
, 0, sizeof(xpp
));
2036 memset(&xecfg
, 0, sizeof(xecfg
));
2037 memset(&ecbdata
, 0, sizeof(ecbdata
));
2038 ecbdata
.label_path
= lbl
;
2039 ecbdata
.color_diff
= DIFF_OPT_TST(o
, COLOR_DIFF
);
2040 ecbdata
.found_changesp
= &o
->found_changes
;
2041 ecbdata
.ws_rule
= whitespace_rule(name_b
? name_b
: name_a
);
2042 if (ecbdata
.ws_rule
& WS_BLANK_AT_EOF
)
2043 check_blank_at_eof(&mf1
, &mf2
, &ecbdata
);
2045 ecbdata
.header
= header
.len
? &header
: NULL
;
2046 xpp
.flags
= o
->xdl_opts
;
2047 xecfg
.ctxlen
= o
->context
;
2048 xecfg
.interhunkctxlen
= o
->interhunkcontext
;
2049 xecfg
.flags
= XDL_EMIT_FUNCNAMES
;
2051 xdiff_set_find_func(&xecfg
, pe
->pattern
, pe
->cflags
);
2054 else if (!prefixcmp(diffopts
, "--unified="))
2055 xecfg
.ctxlen
= strtoul(diffopts
+ 10, NULL
, 10);
2056 else if (!prefixcmp(diffopts
, "-u"))
2057 xecfg
.ctxlen
= strtoul(diffopts
+ 2, NULL
, 10);
2061 ecbdata
.diff_words
=
2062 xcalloc(1, sizeof(struct diff_words_data
));
2063 ecbdata
.diff_words
->type
= o
->word_diff
;
2064 ecbdata
.diff_words
->opt
= o
;
2066 o
->word_regex
= userdiff_word_regex(one
);
2068 o
->word_regex
= userdiff_word_regex(two
);
2070 o
->word_regex
= diff_word_regex_cfg
;
2071 if (o
->word_regex
) {
2072 ecbdata
.diff_words
->word_regex
= (regex_t
*)
2073 xmalloc(sizeof(regex_t
));
2074 if (regcomp(ecbdata
.diff_words
->word_regex
,
2076 REG_EXTENDED
| REG_NEWLINE
))
2077 die ("Invalid regular expression: %s",
2080 for (i
= 0; i
< ARRAY_SIZE(diff_words_styles
); i
++) {
2081 if (o
->word_diff
== diff_words_styles
[i
].type
) {
2082 ecbdata
.diff_words
->style
=
2083 &diff_words_styles
[i
];
2087 if (DIFF_OPT_TST(o
, COLOR_DIFF
)) {
2088 struct diff_words_style
*st
= ecbdata
.diff_words
->style
;
2089 st
->old
.color
= diff_get_color_opt(o
, DIFF_FILE_OLD
);
2090 st
->new.color
= diff_get_color_opt(o
, DIFF_FILE_NEW
);
2091 st
->ctx
.color
= diff_get_color_opt(o
, DIFF_PLAIN
);
2094 xdi_diff_outf(&mf1
, &mf2
, fn_out_consume
, &ecbdata
,
2097 free_diff_words_data(&ecbdata
);
2102 xdiff_clear_find_func(&xecfg
);
2106 strbuf_release(&header
);
2107 diff_free_filespec_data(one
);
2108 diff_free_filespec_data(two
);
2114 static void builtin_diffstat(const char *name_a
, const char *name_b
,
2115 struct diff_filespec
*one
,
2116 struct diff_filespec
*two
,
2117 struct diffstat_t
*diffstat
,
2118 struct diff_options
*o
,
2119 int complete_rewrite
)
2122 struct diffstat_file
*data
;
2124 data
= diffstat_add(diffstat
, name_a
, name_b
);
2127 data
->is_unmerged
= 1;
2131 if (diff_filespec_is_binary(one
) || diff_filespec_is_binary(two
)) {
2132 data
->is_binary
= 1;
2133 data
->added
= diff_filespec_size(two
);
2134 data
->deleted
= diff_filespec_size(one
);
2137 else if (complete_rewrite
) {
2138 diff_populate_filespec(one
, 0);
2139 diff_populate_filespec(two
, 0);
2140 data
->deleted
= count_lines(one
->data
, one
->size
);
2141 data
->added
= count_lines(two
->data
, two
->size
);
2145 /* Crazy xdl interfaces.. */
2149 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
2150 die("unable to read files to diff");
2152 memset(&xpp
, 0, sizeof(xpp
));
2153 memset(&xecfg
, 0, sizeof(xecfg
));
2154 xpp
.flags
= o
->xdl_opts
;
2155 xdi_diff_outf(&mf1
, &mf2
, diffstat_consume
, diffstat
,
2159 diff_free_filespec_data(one
);
2160 diff_free_filespec_data(two
);
2163 static void builtin_checkdiff(const char *name_a
, const char *name_b
,
2164 const char *attr_path
,
2165 struct diff_filespec
*one
,
2166 struct diff_filespec
*two
,
2167 struct diff_options
*o
)
2170 struct checkdiff_t data
;
2175 memset(&data
, 0, sizeof(data
));
2176 data
.filename
= name_b
? name_b
: name_a
;
2179 data
.ws_rule
= whitespace_rule(attr_path
);
2180 data
.conflict_marker_size
= ll_merge_marker_size(attr_path
);
2182 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
2183 die("unable to read files to diff");
2186 * All the other codepaths check both sides, but not checking
2187 * the "old" side here is deliberate. We are checking the newly
2188 * introduced changes, and as long as the "new" side is text, we
2189 * can and should check what it introduces.
2191 if (diff_filespec_is_binary(two
))
2192 goto free_and_return
;
2194 /* Crazy xdl interfaces.. */
2198 memset(&xpp
, 0, sizeof(xpp
));
2199 memset(&xecfg
, 0, sizeof(xecfg
));
2200 xecfg
.ctxlen
= 1; /* at least one context line */
2202 xdi_diff_outf(&mf1
, &mf2
, checkdiff_consume
, &data
,
2205 if (data
.ws_rule
& WS_BLANK_AT_EOF
) {
2206 struct emit_callback ecbdata
;
2209 ecbdata
.ws_rule
= data
.ws_rule
;
2210 check_blank_at_eof(&mf1
, &mf2
, &ecbdata
);
2211 blank_at_eof
= ecbdata
.blank_at_eof_in_postimage
;
2216 err
= whitespace_error_string(WS_BLANK_AT_EOF
);
2217 fprintf(o
->file
, "%s:%d: %s.\n",
2218 data
.filename
, blank_at_eof
, err
);
2219 data
.status
= 1; /* report errors */
2224 diff_free_filespec_data(one
);
2225 diff_free_filespec_data(two
);
2227 DIFF_OPT_SET(o
, CHECK_FAILED
);
2230 struct diff_filespec
*alloc_filespec(const char *path
)
2232 int namelen
= strlen(path
);
2233 struct diff_filespec
*spec
= xmalloc(sizeof(*spec
) + namelen
+ 1);
2235 memset(spec
, 0, sizeof(*spec
));
2236 spec
->path
= (char *)(spec
+ 1);
2237 memcpy(spec
->path
, path
, namelen
+1);
2239 spec
->is_binary
= -1;
2243 void free_filespec(struct diff_filespec
*spec
)
2245 if (!--spec
->count
) {
2246 diff_free_filespec_data(spec
);
2251 void fill_filespec(struct diff_filespec
*spec
, const unsigned char *sha1
,
2252 unsigned short mode
)
2255 spec
->mode
= canon_mode(mode
);
2256 hashcpy(spec
->sha1
, sha1
);
2257 spec
->sha1_valid
= !is_null_sha1(sha1
);
2262 * Given a name and sha1 pair, if the index tells us the file in
2263 * the work tree has that object contents, return true, so that
2264 * prepare_temp_file() does not have to inflate and extract.
2266 static int reuse_worktree_file(const char *name
, const unsigned char *sha1
, int want_file
)
2268 struct cache_entry
*ce
;
2273 * We do not read the cache ourselves here, because the
2274 * benchmark with my previous version that always reads cache
2275 * shows that it makes things worse for diff-tree comparing
2276 * two linux-2.6 kernel trees in an already checked out work
2277 * tree. This is because most diff-tree comparisons deal with
2278 * only a small number of files, while reading the cache is
2279 * expensive for a large project, and its cost outweighs the
2280 * savings we get by not inflating the object to a temporary
2281 * file. Practically, this code only helps when we are used
2282 * by diff-cache --cached, which does read the cache before
2288 /* We want to avoid the working directory if our caller
2289 * doesn't need the data in a normal file, this system
2290 * is rather slow with its stat/open/mmap/close syscalls,
2291 * and the object is contained in a pack file. The pack
2292 * is probably already open and will be faster to obtain
2293 * the data through than the working directory. Loose
2294 * objects however would tend to be slower as they need
2295 * to be individually opened and inflated.
2297 if (!FAST_WORKING_DIRECTORY
&& !want_file
&& has_sha1_pack(sha1
))
2301 pos
= cache_name_pos(name
, len
);
2304 ce
= active_cache
[pos
];
2307 * This is not the sha1 we are looking for, or
2308 * unreusable because it is not a regular file.
2310 if (hashcmp(sha1
, ce
->sha1
) || !S_ISREG(ce
->ce_mode
))
2314 * If ce is marked as "assume unchanged", there is no
2315 * guarantee that work tree matches what we are looking for.
2317 if ((ce
->ce_flags
& CE_VALID
) || ce_skip_worktree(ce
))
2321 * If ce matches the file in the work tree, we can reuse it.
2323 if (ce_uptodate(ce
) ||
2324 (!lstat(name
, &st
) && !ce_match_stat(ce
, &st
, 0)))
2330 static int populate_from_stdin(struct diff_filespec
*s
)
2332 struct strbuf buf
= STRBUF_INIT
;
2335 if (strbuf_read(&buf
, 0, 0) < 0)
2336 return error("error while reading from stdin %s",
2339 s
->should_munmap
= 0;
2340 s
->data
= strbuf_detach(&buf
, &size
);
2346 static int diff_populate_gitlink(struct diff_filespec
*s
, int size_only
)
2349 char *data
= xmalloc(100), *dirty
= "";
2351 /* Are we looking at the work tree? */
2352 if (s
->dirty_submodule
)
2355 len
= snprintf(data
, 100,
2356 "Subproject commit %s%s\n", sha1_to_hex(s
->sha1
), dirty
);
2368 * While doing rename detection and pickaxe operation, we may need to
2369 * grab the data for the blob (or file) for our own in-core comparison.
2370 * diff_filespec has data and size fields for this purpose.
2372 int diff_populate_filespec(struct diff_filespec
*s
, int size_only
)
2375 if (!DIFF_FILE_VALID(s
))
2376 die("internal error: asking to populate invalid file.");
2377 if (S_ISDIR(s
->mode
))
2383 if (size_only
&& 0 < s
->size
)
2386 if (S_ISGITLINK(s
->mode
))
2387 return diff_populate_gitlink(s
, size_only
);
2389 if (!s
->sha1_valid
||
2390 reuse_worktree_file(s
->path
, s
->sha1
, 0)) {
2391 struct strbuf buf
= STRBUF_INIT
;
2395 if (!strcmp(s
->path
, "-"))
2396 return populate_from_stdin(s
);
2398 if (lstat(s
->path
, &st
) < 0) {
2399 if (errno
== ENOENT
) {
2403 s
->data
= (char *)"";
2408 s
->size
= xsize_t(st
.st_size
);
2411 if (S_ISLNK(st
.st_mode
)) {
2412 struct strbuf sb
= STRBUF_INIT
;
2414 if (strbuf_readlink(&sb
, s
->path
, s
->size
))
2417 s
->data
= strbuf_detach(&sb
, NULL
);
2423 fd
= open(s
->path
, O_RDONLY
);
2426 s
->data
= xmmap(NULL
, s
->size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
2428 s
->should_munmap
= 1;
2431 * Convert from working tree format to canonical git format
2433 if (convert_to_git(s
->path
, s
->data
, s
->size
, &buf
, safe_crlf
)) {
2435 munmap(s
->data
, s
->size
);
2436 s
->should_munmap
= 0;
2437 s
->data
= strbuf_detach(&buf
, &size
);
2443 enum object_type type
;
2445 type
= sha1_object_info(s
->sha1
, &s
->size
);
2447 die("unable to read %s", sha1_to_hex(s
->sha1
));
2449 s
->data
= read_sha1_file(s
->sha1
, &type
, &s
->size
);
2451 die("unable to read %s", sha1_to_hex(s
->sha1
));
2458 void diff_free_filespec_blob(struct diff_filespec
*s
)
2462 else if (s
->should_munmap
)
2463 munmap(s
->data
, s
->size
);
2465 if (s
->should_free
|| s
->should_munmap
) {
2466 s
->should_free
= s
->should_munmap
= 0;
2471 void diff_free_filespec_data(struct diff_filespec
*s
)
2473 diff_free_filespec_blob(s
);
2478 static void prep_temp_blob(const char *path
, struct diff_tempfile
*temp
,
2481 const unsigned char *sha1
,
2485 struct strbuf buf
= STRBUF_INIT
;
2486 struct strbuf
template = STRBUF_INIT
;
2487 char *path_dup
= xstrdup(path
);
2488 const char *base
= basename(path_dup
);
2490 /* Generate "XXXXXX_basename.ext" */
2491 strbuf_addstr(&template, "XXXXXX_");
2492 strbuf_addstr(&template, base
);
2494 fd
= git_mkstemps(temp
->tmp_path
, PATH_MAX
, template.buf
,
2497 die_errno("unable to create temp-file");
2498 if (convert_to_working_tree(path
,
2499 (const char *)blob
, (size_t)size
, &buf
)) {
2503 if (write_in_full(fd
, blob
, size
) != size
)
2504 die_errno("unable to write temp-file");
2506 temp
->name
= temp
->tmp_path
;
2507 strcpy(temp
->hex
, sha1_to_hex(sha1
));
2509 sprintf(temp
->mode
, "%06o", mode
);
2510 strbuf_release(&buf
);
2511 strbuf_release(&template);
2515 static struct diff_tempfile
*prepare_temp_file(const char *name
,
2516 struct diff_filespec
*one
)
2518 struct diff_tempfile
*temp
= claim_diff_tempfile();
2520 if (!DIFF_FILE_VALID(one
)) {
2522 /* A '-' entry produces this for file-2, and
2523 * a '+' entry produces this for file-1.
2525 temp
->name
= "/dev/null";
2526 strcpy(temp
->hex
, ".");
2527 strcpy(temp
->mode
, ".");
2531 if (!remove_tempfile_installed
) {
2532 atexit(remove_tempfile
);
2533 sigchain_push_common(remove_tempfile_on_signal
);
2534 remove_tempfile_installed
= 1;
2537 if (!one
->sha1_valid
||
2538 reuse_worktree_file(name
, one
->sha1
, 1)) {
2540 if (lstat(name
, &st
) < 0) {
2541 if (errno
== ENOENT
)
2542 goto not_a_valid_file
;
2543 die_errno("stat(%s)", name
);
2545 if (S_ISLNK(st
.st_mode
)) {
2546 struct strbuf sb
= STRBUF_INIT
;
2547 if (strbuf_readlink(&sb
, name
, st
.st_size
) < 0)
2548 die_errno("readlink(%s)", name
);
2549 prep_temp_blob(name
, temp
, sb
.buf
, sb
.len
,
2551 one
->sha1
: null_sha1
),
2553 one
->mode
: S_IFLNK
));
2554 strbuf_release(&sb
);
2557 /* we can borrow from the file in the work tree */
2559 if (!one
->sha1_valid
)
2560 strcpy(temp
->hex
, sha1_to_hex(null_sha1
));
2562 strcpy(temp
->hex
, sha1_to_hex(one
->sha1
));
2563 /* Even though we may sometimes borrow the
2564 * contents from the work tree, we always want
2565 * one->mode. mode is trustworthy even when
2566 * !(one->sha1_valid), as long as
2567 * DIFF_FILE_VALID(one).
2569 sprintf(temp
->mode
, "%06o", one
->mode
);
2574 if (diff_populate_filespec(one
, 0))
2575 die("cannot read data blob for %s", one
->path
);
2576 prep_temp_blob(name
, temp
, one
->data
, one
->size
,
2577 one
->sha1
, one
->mode
);
2582 /* An external diff command takes:
2584 * diff-cmd name infile1 infile1-sha1 infile1-mode \
2585 * infile2 infile2-sha1 infile2-mode [ rename-to ]
2588 static void run_external_diff(const char *pgm
,
2591 struct diff_filespec
*one
,
2592 struct diff_filespec
*two
,
2593 const char *xfrm_msg
,
2594 int complete_rewrite
)
2596 const char *spawn_arg
[10];
2598 const char **arg
= &spawn_arg
[0];
2601 struct diff_tempfile
*temp_one
, *temp_two
;
2602 const char *othername
= (other
? other
: name
);
2603 temp_one
= prepare_temp_file(name
, one
);
2604 temp_two
= prepare_temp_file(othername
, two
);
2607 *arg
++ = temp_one
->name
;
2608 *arg
++ = temp_one
->hex
;
2609 *arg
++ = temp_one
->mode
;
2610 *arg
++ = temp_two
->name
;
2611 *arg
++ = temp_two
->hex
;
2612 *arg
++ = temp_two
->mode
;
2623 retval
= run_command_v_opt(spawn_arg
, RUN_USING_SHELL
);
2626 fprintf(stderr
, "external diff died, stopping at %s.\n", name
);
2631 static int similarity_index(struct diff_filepair
*p
)
2633 return p
->score
* 100 / MAX_SCORE
;
2636 static void fill_metainfo(struct strbuf
*msg
,
2639 struct diff_filespec
*one
,
2640 struct diff_filespec
*two
,
2641 struct diff_options
*o
,
2642 struct diff_filepair
*p
,
2643 int *must_show_header
,
2646 const char *set
= diff_get_color(use_color
, DIFF_METAINFO
);
2647 const char *reset
= diff_get_color(use_color
, DIFF_RESET
);
2648 struct strbuf
*msgbuf
;
2649 char *line_prefix
= "";
2651 *must_show_header
= 1;
2652 if (o
->output_prefix
) {
2653 msgbuf
= o
->output_prefix(o
, o
->output_prefix_data
);
2654 line_prefix
= msgbuf
->buf
;
2656 strbuf_init(msg
, PATH_MAX
* 2 + 300);
2657 switch (p
->status
) {
2658 case DIFF_STATUS_COPIED
:
2659 strbuf_addf(msg
, "%s%ssimilarity index %d%%",
2660 line_prefix
, set
, similarity_index(p
));
2661 strbuf_addf(msg
, "%s\n%s%scopy from ",
2662 reset
, line_prefix
, set
);
2663 quote_c_style(name
, msg
, NULL
, 0);
2664 strbuf_addf(msg
, "%s\n%s%scopy to ", reset
, line_prefix
, set
);
2665 quote_c_style(other
, msg
, NULL
, 0);
2666 strbuf_addf(msg
, "%s\n", reset
);
2668 case DIFF_STATUS_RENAMED
:
2669 strbuf_addf(msg
, "%s%ssimilarity index %d%%",
2670 line_prefix
, set
, similarity_index(p
));
2671 strbuf_addf(msg
, "%s\n%s%srename from ",
2672 reset
, line_prefix
, set
);
2673 quote_c_style(name
, msg
, NULL
, 0);
2674 strbuf_addf(msg
, "%s\n%s%srename to ",
2675 reset
, line_prefix
, set
);
2676 quote_c_style(other
, msg
, NULL
, 0);
2677 strbuf_addf(msg
, "%s\n", reset
);
2679 case DIFF_STATUS_MODIFIED
:
2681 strbuf_addf(msg
, "%s%sdissimilarity index %d%%%s\n",
2683 set
, similarity_index(p
), reset
);
2688 *must_show_header
= 0;
2690 if (one
&& two
&& hashcmp(one
->sha1
, two
->sha1
)) {
2691 int abbrev
= DIFF_OPT_TST(o
, FULL_INDEX
) ? 40 : DEFAULT_ABBREV
;
2693 if (DIFF_OPT_TST(o
, BINARY
)) {
2695 if ((!fill_mmfile(&mf
, one
) && diff_filespec_is_binary(one
)) ||
2696 (!fill_mmfile(&mf
, two
) && diff_filespec_is_binary(two
)))
2699 strbuf_addf(msg
, "%s%sindex %s..", line_prefix
, set
,
2700 find_unique_abbrev(one
->sha1
, abbrev
));
2701 strbuf_addstr(msg
, find_unique_abbrev(two
->sha1
, abbrev
));
2702 if (one
->mode
== two
->mode
)
2703 strbuf_addf(msg
, " %06o", one
->mode
);
2704 strbuf_addf(msg
, "%s\n", reset
);
2708 static void run_diff_cmd(const char *pgm
,
2711 const char *attr_path
,
2712 struct diff_filespec
*one
,
2713 struct diff_filespec
*two
,
2715 struct diff_options
*o
,
2716 struct diff_filepair
*p
)
2718 const char *xfrm_msg
= NULL
;
2719 int complete_rewrite
= (p
->status
== DIFF_STATUS_MODIFIED
) && p
->score
;
2720 int must_show_header
= 0;
2722 if (!DIFF_OPT_TST(o
, ALLOW_EXTERNAL
))
2725 struct userdiff_driver
*drv
= userdiff_find_by_path(attr_path
);
2726 if (drv
&& drv
->external
)
2727 pgm
= drv
->external
;
2732 * don't use colors when the header is intended for an
2733 * external diff driver
2735 fill_metainfo(msg
, name
, other
, one
, two
, o
, p
,
2737 DIFF_OPT_TST(o
, COLOR_DIFF
) && !pgm
);
2738 xfrm_msg
= msg
->len
? msg
->buf
: NULL
;
2742 run_external_diff(pgm
, name
, other
, one
, two
, xfrm_msg
,
2747 builtin_diff(name
, other
? other
: name
,
2748 one
, two
, xfrm_msg
, must_show_header
,
2749 o
, complete_rewrite
);
2751 fprintf(o
->file
, "* Unmerged path %s\n", name
);
2754 static void diff_fill_sha1_info(struct diff_filespec
*one
)
2756 if (DIFF_FILE_VALID(one
)) {
2757 if (!one
->sha1_valid
) {
2759 if (!strcmp(one
->path
, "-")) {
2760 hashcpy(one
->sha1
, null_sha1
);
2763 if (lstat(one
->path
, &st
) < 0)
2764 die_errno("stat '%s'", one
->path
);
2765 if (index_path(one
->sha1
, one
->path
, &st
, 0))
2766 die("cannot hash %s", one
->path
);
2773 static void strip_prefix(int prefix_length
, const char **namep
, const char **otherp
)
2775 /* Strip the prefix but do not molest /dev/null and absolute paths */
2776 if (*namep
&& **namep
!= '/') {
2777 *namep
+= prefix_length
;
2781 if (*otherp
&& **otherp
!= '/') {
2782 *otherp
+= prefix_length
;
2783 if (**otherp
== '/')
2788 static void run_diff(struct diff_filepair
*p
, struct diff_options
*o
)
2790 const char *pgm
= external_diff();
2792 struct diff_filespec
*one
= p
->one
;
2793 struct diff_filespec
*two
= p
->two
;
2796 const char *attr_path
;
2798 name
= p
->one
->path
;
2799 other
= (strcmp(name
, p
->two
->path
) ? p
->two
->path
: NULL
);
2801 if (o
->prefix_length
)
2802 strip_prefix(o
->prefix_length
, &name
, &other
);
2804 if (DIFF_PAIR_UNMERGED(p
)) {
2805 run_diff_cmd(pgm
, name
, NULL
, attr_path
,
2806 NULL
, NULL
, NULL
, o
, p
);
2810 diff_fill_sha1_info(one
);
2811 diff_fill_sha1_info(two
);
2814 DIFF_FILE_VALID(one
) && DIFF_FILE_VALID(two
) &&
2815 (S_IFMT
& one
->mode
) != (S_IFMT
& two
->mode
)) {
2817 * a filepair that changes between file and symlink
2818 * needs to be split into deletion and creation.
2820 struct diff_filespec
*null
= alloc_filespec(two
->path
);
2821 run_diff_cmd(NULL
, name
, other
, attr_path
,
2822 one
, null
, &msg
, o
, p
);
2824 strbuf_release(&msg
);
2826 null
= alloc_filespec(one
->path
);
2827 run_diff_cmd(NULL
, name
, other
, attr_path
,
2828 null
, two
, &msg
, o
, p
);
2832 run_diff_cmd(pgm
, name
, other
, attr_path
,
2833 one
, two
, &msg
, o
, p
);
2835 strbuf_release(&msg
);
2838 static void run_diffstat(struct diff_filepair
*p
, struct diff_options
*o
,
2839 struct diffstat_t
*diffstat
)
2843 int complete_rewrite
= 0;
2845 if (DIFF_PAIR_UNMERGED(p
)) {
2847 builtin_diffstat(p
->one
->path
, NULL
, NULL
, NULL
, diffstat
, o
, 0);
2851 name
= p
->one
->path
;
2852 other
= (strcmp(name
, p
->two
->path
) ? p
->two
->path
: NULL
);
2854 if (o
->prefix_length
)
2855 strip_prefix(o
->prefix_length
, &name
, &other
);
2857 diff_fill_sha1_info(p
->one
);
2858 diff_fill_sha1_info(p
->two
);
2860 if (p
->status
== DIFF_STATUS_MODIFIED
&& p
->score
)
2861 complete_rewrite
= 1;
2862 builtin_diffstat(name
, other
, p
->one
, p
->two
, diffstat
, o
, complete_rewrite
);
2865 static void run_checkdiff(struct diff_filepair
*p
, struct diff_options
*o
)
2869 const char *attr_path
;
2871 if (DIFF_PAIR_UNMERGED(p
)) {
2876 name
= p
->one
->path
;
2877 other
= (strcmp(name
, p
->two
->path
) ? p
->two
->path
: NULL
);
2878 attr_path
= other
? other
: name
;
2880 if (o
->prefix_length
)
2881 strip_prefix(o
->prefix_length
, &name
, &other
);
2883 diff_fill_sha1_info(p
->one
);
2884 diff_fill_sha1_info(p
->two
);
2886 builtin_checkdiff(name
, other
, attr_path
, p
->one
, p
->two
, o
);
2889 void diff_setup(struct diff_options
*options
)
2891 memcpy(options
, &default_diff_options
, sizeof(*options
));
2893 options
->file
= stdout
;
2895 options
->line_termination
= '\n';
2896 options
->break_opt
= -1;
2897 options
->rename_limit
= -1;
2898 options
->dirstat_percent
= 3;
2899 options
->context
= 3;
2901 options
->change
= diff_change
;
2902 options
->add_remove
= diff_addremove
;
2903 if (diff_use_color_default
> 0)
2904 DIFF_OPT_SET(options
, COLOR_DIFF
);
2905 options
->detect_rename
= diff_detect_rename_default
;
2907 if (diff_no_prefix
) {
2908 options
->a_prefix
= options
->b_prefix
= "";
2909 } else if (!diff_mnemonic_prefix
) {
2910 options
->a_prefix
= "a/";
2911 options
->b_prefix
= "b/";
2915 int diff_setup_done(struct diff_options
*options
)
2919 if (options
->output_format
& DIFF_FORMAT_NAME
)
2921 if (options
->output_format
& DIFF_FORMAT_NAME_STATUS
)
2923 if (options
->output_format
& DIFF_FORMAT_CHECKDIFF
)
2925 if (options
->output_format
& DIFF_FORMAT_NO_OUTPUT
)
2928 die("--name-only, --name-status, --check and -s are mutually exclusive");
2931 * Most of the time we can say "there are changes"
2932 * only by checking if there are changed paths, but
2933 * --ignore-whitespace* options force us to look
2937 if (DIFF_XDL_TST(options
, IGNORE_WHITESPACE
) ||
2938 DIFF_XDL_TST(options
, IGNORE_WHITESPACE_CHANGE
) ||
2939 DIFF_XDL_TST(options
, IGNORE_WHITESPACE_AT_EOL
))
2940 DIFF_OPT_SET(options
, DIFF_FROM_CONTENTS
);
2942 DIFF_OPT_CLR(options
, DIFF_FROM_CONTENTS
);
2944 if (DIFF_OPT_TST(options
, FIND_COPIES_HARDER
))
2945 options
->detect_rename
= DIFF_DETECT_COPY
;
2947 if (!DIFF_OPT_TST(options
, RELATIVE_NAME
))
2948 options
->prefix
= NULL
;
2949 if (options
->prefix
)
2950 options
->prefix_length
= strlen(options
->prefix
);
2952 options
->prefix_length
= 0;
2954 if (options
->output_format
& (DIFF_FORMAT_NAME
|
2955 DIFF_FORMAT_NAME_STATUS
|
2956 DIFF_FORMAT_CHECKDIFF
|
2957 DIFF_FORMAT_NO_OUTPUT
))
2958 options
->output_format
&= ~(DIFF_FORMAT_RAW
|
2959 DIFF_FORMAT_NUMSTAT
|
2960 DIFF_FORMAT_DIFFSTAT
|
2961 DIFF_FORMAT_SHORTSTAT
|
2962 DIFF_FORMAT_DIRSTAT
|
2963 DIFF_FORMAT_SUMMARY
|
2967 * These cases always need recursive; we do not drop caller-supplied
2968 * recursive bits for other formats here.
2970 if (options
->output_format
& (DIFF_FORMAT_PATCH
|
2971 DIFF_FORMAT_NUMSTAT
|
2972 DIFF_FORMAT_DIFFSTAT
|
2973 DIFF_FORMAT_SHORTSTAT
|
2974 DIFF_FORMAT_DIRSTAT
|
2975 DIFF_FORMAT_SUMMARY
|
2976 DIFF_FORMAT_CHECKDIFF
))
2977 DIFF_OPT_SET(options
, RECURSIVE
);
2979 * Also pickaxe would not work very well if you do not say recursive
2981 if (options
->pickaxe
)
2982 DIFF_OPT_SET(options
, RECURSIVE
);
2984 * When patches are generated, submodules diffed against the work tree
2985 * must be checked for dirtiness too so it can be shown in the output
2987 if (options
->output_format
& DIFF_FORMAT_PATCH
)
2988 DIFF_OPT_SET(options
, DIRTY_SUBMODULES
);
2990 if (options
->detect_rename
&& options
->rename_limit
< 0)
2991 options
->rename_limit
= diff_rename_limit_default
;
2992 if (options
->setup
& DIFF_SETUP_USE_CACHE
) {
2994 /* read-cache does not die even when it fails
2995 * so it is safe for us to do this here. Also
2996 * it does not smudge active_cache or active_nr
2997 * when it fails, so we do not have to worry about
2998 * cleaning it up ourselves either.
3002 if (options
->abbrev
<= 0 || 40 < options
->abbrev
)
3003 options
->abbrev
= 40; /* full */
3006 * It does not make sense to show the first hit we happened
3007 * to have found. It does not make sense not to return with
3008 * exit code in such a case either.
3010 if (DIFF_OPT_TST(options
, QUICK
)) {
3011 options
->output_format
= DIFF_FORMAT_NO_OUTPUT
;
3012 DIFF_OPT_SET(options
, EXIT_WITH_STATUS
);
3018 static int opt_arg(const char *arg
, int arg_short
, const char *arg_long
, int *val
)
3028 if (c
== arg_short
) {
3032 if (val
&& isdigit(c
)) {
3034 int n
= strtoul(arg
, &end
, 10);
3045 eq
= strchr(arg
, '=');
3050 if (!len
|| strncmp(arg
, arg_long
, len
))
3055 if (!isdigit(*++eq
))
3057 n
= strtoul(eq
, &end
, 10);
3065 static int diff_scoreopt_parse(const char *opt
);
3067 static inline int short_opt(char opt
, const char **argv
,
3068 const char **optarg
)
3070 const char *arg
= argv
[0];
3071 if (arg
[0] != '-' || arg
[1] != opt
)
3073 if (arg
[2] != '\0') {
3078 die("Option '%c' requires a value", opt
);
3083 int parse_long_opt(const char *opt
, const char **argv
,
3084 const char **optarg
)
3086 const char *arg
= argv
[0];
3087 if (arg
[0] != '-' || arg
[1] != '-')
3089 arg
+= strlen("--");
3090 if (prefixcmp(arg
, opt
))
3093 if (*arg
== '=') { /* sticked form: --option=value */
3099 /* separate form: --option value */
3101 die("Option '--%s' requires a value", opt
);
3106 static int stat_opt(struct diff_options
*options
, const char **av
)
3108 const char *arg
= av
[0];
3110 int width
= options
->stat_width
;
3111 int name_width
= options
->stat_name_width
;
3114 arg
+= strlen("--stat");
3119 if (!prefixcmp(arg
, "-width")) {
3120 arg
+= strlen("-width");
3122 width
= strtoul(arg
+ 1, &end
, 10);
3123 else if (!*arg
&& !av
[1])
3124 die("Option '--stat-width' requires a value");
3126 width
= strtoul(av
[1], &end
, 10);
3129 } else if (!prefixcmp(arg
, "-name-width")) {
3130 arg
+= strlen("-name-width");
3132 name_width
= strtoul(arg
+ 1, &end
, 10);
3133 else if (!*arg
&& !av
[1])
3134 die("Option '--stat-name-width' requires a value");
3136 name_width
= strtoul(av
[1], &end
, 10);
3142 width
= strtoul(arg
+1, &end
, 10);
3144 name_width
= strtoul(end
+1, &end
, 10);
3147 /* Important! This checks all the error cases! */
3150 options
->output_format
|= DIFF_FORMAT_DIFFSTAT
;
3151 options
->stat_name_width
= name_width
;
3152 options
->stat_width
= width
;
3156 int diff_opt_parse(struct diff_options
*options
, const char **av
, int ac
)
3158 const char *arg
= av
[0];
3162 /* Output format options */
3163 if (!strcmp(arg
, "-p") || !strcmp(arg
, "-u") || !strcmp(arg
, "--patch"))
3164 options
->output_format
|= DIFF_FORMAT_PATCH
;
3165 else if (opt_arg(arg
, 'U', "unified", &options
->context
))
3166 options
->output_format
|= DIFF_FORMAT_PATCH
;
3167 else if (!strcmp(arg
, "--raw"))
3168 options
->output_format
|= DIFF_FORMAT_RAW
;
3169 else if (!strcmp(arg
, "--patch-with-raw"))
3170 options
->output_format
|= DIFF_FORMAT_PATCH
| DIFF_FORMAT_RAW
;
3171 else if (!strcmp(arg
, "--numstat"))
3172 options
->output_format
|= DIFF_FORMAT_NUMSTAT
;
3173 else if (!strcmp(arg
, "--shortstat"))
3174 options
->output_format
|= DIFF_FORMAT_SHORTSTAT
;
3175 else if (opt_arg(arg
, 'X', "dirstat", &options
->dirstat_percent
))
3176 options
->output_format
|= DIFF_FORMAT_DIRSTAT
;
3177 else if (!strcmp(arg
, "--cumulative")) {
3178 options
->output_format
|= DIFF_FORMAT_DIRSTAT
;
3179 DIFF_OPT_SET(options
, DIRSTAT_CUMULATIVE
);
3180 } else if (opt_arg(arg
, 0, "dirstat-by-file",
3181 &options
->dirstat_percent
)) {
3182 options
->output_format
|= DIFF_FORMAT_DIRSTAT
;
3183 DIFF_OPT_SET(options
, DIRSTAT_BY_FILE
);
3185 else if (!strcmp(arg
, "--check"))
3186 options
->output_format
|= DIFF_FORMAT_CHECKDIFF
;
3187 else if (!strcmp(arg
, "--summary"))
3188 options
->output_format
|= DIFF_FORMAT_SUMMARY
;
3189 else if (!strcmp(arg
, "--patch-with-stat"))
3190 options
->output_format
|= DIFF_FORMAT_PATCH
| DIFF_FORMAT_DIFFSTAT
;
3191 else if (!strcmp(arg
, "--name-only"))
3192 options
->output_format
|= DIFF_FORMAT_NAME
;
3193 else if (!strcmp(arg
, "--name-status"))
3194 options
->output_format
|= DIFF_FORMAT_NAME_STATUS
;
3195 else if (!strcmp(arg
, "-s"))
3196 options
->output_format
|= DIFF_FORMAT_NO_OUTPUT
;
3197 else if (!prefixcmp(arg
, "--stat"))
3198 /* --stat, --stat-width, or --stat-name-width */
3199 return stat_opt(options
, av
);
3201 /* renames options */
3202 else if (!prefixcmp(arg
, "-B") || !prefixcmp(arg
, "--break-rewrites=") ||
3203 !strcmp(arg
, "--break-rewrites")) {
3204 if ((options
->break_opt
= diff_scoreopt_parse(arg
)) == -1)
3205 return error("invalid argument to -B: %s", arg
+2);
3207 else if (!prefixcmp(arg
, "-M") || !prefixcmp(arg
, "--find-renames=") ||
3208 !strcmp(arg
, "--find-renames")) {
3209 if ((options
->rename_score
= diff_scoreopt_parse(arg
)) == -1)
3210 return error("invalid argument to -M: %s", arg
+2);
3211 options
->detect_rename
= DIFF_DETECT_RENAME
;
3213 else if (!strcmp(arg
, "-D") || !strcmp(arg
, "--irreversible-delete")) {
3214 options
->irreversible_delete
= 1;
3216 else if (!prefixcmp(arg
, "-C") || !prefixcmp(arg
, "--find-copies=") ||
3217 !strcmp(arg
, "--find-copies")) {
3218 if (options
->detect_rename
== DIFF_DETECT_COPY
)
3219 DIFF_OPT_SET(options
, FIND_COPIES_HARDER
);
3220 if ((options
->rename_score
= diff_scoreopt_parse(arg
)) == -1)
3221 return error("invalid argument to -C: %s", arg
+2);
3222 options
->detect_rename
= DIFF_DETECT_COPY
;
3224 else if (!strcmp(arg
, "--no-renames"))
3225 options
->detect_rename
= 0;
3226 else if (!strcmp(arg
, "--relative"))
3227 DIFF_OPT_SET(options
, RELATIVE_NAME
);
3228 else if (!prefixcmp(arg
, "--relative=")) {
3229 DIFF_OPT_SET(options
, RELATIVE_NAME
);
3230 options
->prefix
= arg
+ 11;
3234 else if (!strcmp(arg
, "-w") || !strcmp(arg
, "--ignore-all-space"))
3235 DIFF_XDL_SET(options
, IGNORE_WHITESPACE
);
3236 else if (!strcmp(arg
, "-b") || !strcmp(arg
, "--ignore-space-change"))
3237 DIFF_XDL_SET(options
, IGNORE_WHITESPACE_CHANGE
);
3238 else if (!strcmp(arg
, "--ignore-space-at-eol"))
3239 DIFF_XDL_SET(options
, IGNORE_WHITESPACE_AT_EOL
);
3240 else if (!strcmp(arg
, "--patience"))
3241 DIFF_XDL_SET(options
, PATIENCE_DIFF
);
3244 else if (!strcmp(arg
, "--binary")) {
3245 options
->output_format
|= DIFF_FORMAT_PATCH
;
3246 DIFF_OPT_SET(options
, BINARY
);
3248 else if (!strcmp(arg
, "--full-index"))
3249 DIFF_OPT_SET(options
, FULL_INDEX
);
3250 else if (!strcmp(arg
, "-a") || !strcmp(arg
, "--text"))
3251 DIFF_OPT_SET(options
, TEXT
);
3252 else if (!strcmp(arg
, "-R"))
3253 DIFF_OPT_SET(options
, REVERSE_DIFF
);
3254 else if (!strcmp(arg
, "--find-copies-harder"))
3255 DIFF_OPT_SET(options
, FIND_COPIES_HARDER
);
3256 else if (!strcmp(arg
, "--follow"))
3257 DIFF_OPT_SET(options
, FOLLOW_RENAMES
);
3258 else if (!strcmp(arg
, "--color"))
3259 DIFF_OPT_SET(options
, COLOR_DIFF
);
3260 else if (!prefixcmp(arg
, "--color=")) {
3261 int value
= git_config_colorbool(NULL
, arg
+8, -1);
3263 DIFF_OPT_CLR(options
, COLOR_DIFF
);
3265 DIFF_OPT_SET(options
, COLOR_DIFF
);
3267 return error("option `color' expects \"always\", \"auto\", or \"never\"");
3269 else if (!strcmp(arg
, "--no-color"))
3270 DIFF_OPT_CLR(options
, COLOR_DIFF
);
3271 else if (!strcmp(arg
, "--color-words")) {
3272 DIFF_OPT_SET(options
, COLOR_DIFF
);
3273 options
->word_diff
= DIFF_WORDS_COLOR
;
3275 else if (!prefixcmp(arg
, "--color-words=")) {
3276 DIFF_OPT_SET(options
, COLOR_DIFF
);
3277 options
->word_diff
= DIFF_WORDS_COLOR
;
3278 options
->word_regex
= arg
+ 14;
3280 else if (!strcmp(arg
, "--word-diff")) {
3281 if (options
->word_diff
== DIFF_WORDS_NONE
)
3282 options
->word_diff
= DIFF_WORDS_PLAIN
;
3284 else if (!prefixcmp(arg
, "--word-diff=")) {
3285 const char *type
= arg
+ 12;
3286 if (!strcmp(type
, "plain"))
3287 options
->word_diff
= DIFF_WORDS_PLAIN
;
3288 else if (!strcmp(type
, "color")) {
3289 DIFF_OPT_SET(options
, COLOR_DIFF
);
3290 options
->word_diff
= DIFF_WORDS_COLOR
;
3292 else if (!strcmp(type
, "porcelain"))
3293 options
->word_diff
= DIFF_WORDS_PORCELAIN
;
3294 else if (!strcmp(type
, "none"))
3295 options
->word_diff
= DIFF_WORDS_NONE
;
3297 die("bad --word-diff argument: %s", type
);
3299 else if ((argcount
= parse_long_opt("word-diff-regex", av
, &optarg
))) {
3300 if (options
->word_diff
== DIFF_WORDS_NONE
)
3301 options
->word_diff
= DIFF_WORDS_PLAIN
;
3302 options
->word_regex
= optarg
;
3305 else if (!strcmp(arg
, "--exit-code"))
3306 DIFF_OPT_SET(options
, EXIT_WITH_STATUS
);
3307 else if (!strcmp(arg
, "--quiet"))
3308 DIFF_OPT_SET(options
, QUICK
);
3309 else if (!strcmp(arg
, "--ext-diff"))
3310 DIFF_OPT_SET(options
, ALLOW_EXTERNAL
);
3311 else if (!strcmp(arg
, "--no-ext-diff"))
3312 DIFF_OPT_CLR(options
, ALLOW_EXTERNAL
);
3313 else if (!strcmp(arg
, "--textconv"))
3314 DIFF_OPT_SET(options
, ALLOW_TEXTCONV
);
3315 else if (!strcmp(arg
, "--no-textconv"))
3316 DIFF_OPT_CLR(options
, ALLOW_TEXTCONV
);
3317 else if (!strcmp(arg
, "--ignore-submodules")) {
3318 DIFF_OPT_SET(options
, OVERRIDE_SUBMODULE_CONFIG
);
3319 handle_ignore_submodules_arg(options
, "all");
3320 } else if (!prefixcmp(arg
, "--ignore-submodules=")) {
3321 DIFF_OPT_SET(options
, OVERRIDE_SUBMODULE_CONFIG
);
3322 handle_ignore_submodules_arg(options
, arg
+ 20);
3323 } else if (!strcmp(arg
, "--submodule"))
3324 DIFF_OPT_SET(options
, SUBMODULE_LOG
);
3325 else if (!prefixcmp(arg
, "--submodule=")) {
3326 if (!strcmp(arg
+ 12, "log"))
3327 DIFF_OPT_SET(options
, SUBMODULE_LOG
);
3331 else if (!strcmp(arg
, "-z"))
3332 options
->line_termination
= 0;
3333 else if ((argcount
= short_opt('l', av
, &optarg
))) {
3334 options
->rename_limit
= strtoul(optarg
, NULL
, 10);
3337 else if ((argcount
= short_opt('S', av
, &optarg
))) {
3338 options
->pickaxe
= optarg
;
3339 options
->pickaxe_opts
|= DIFF_PICKAXE_KIND_S
;
3341 } else if ((argcount
= short_opt('G', av
, &optarg
))) {
3342 options
->pickaxe
= optarg
;
3343 options
->pickaxe_opts
|= DIFF_PICKAXE_KIND_G
;
3346 else if (!strcmp(arg
, "--pickaxe-all"))
3347 options
->pickaxe_opts
|= DIFF_PICKAXE_ALL
;
3348 else if (!strcmp(arg
, "--pickaxe-regex"))
3349 options
->pickaxe_opts
|= DIFF_PICKAXE_REGEX
;
3350 else if ((argcount
= short_opt('O', av
, &optarg
))) {
3351 options
->orderfile
= optarg
;
3354 else if ((argcount
= parse_long_opt("diff-filter", av
, &optarg
))) {
3355 options
->filter
= optarg
;
3358 else if (!strcmp(arg
, "--abbrev"))
3359 options
->abbrev
= DEFAULT_ABBREV
;
3360 else if (!prefixcmp(arg
, "--abbrev=")) {
3361 options
->abbrev
= strtoul(arg
+ 9, NULL
, 10);
3362 if (options
->abbrev
< MINIMUM_ABBREV
)
3363 options
->abbrev
= MINIMUM_ABBREV
;
3364 else if (40 < options
->abbrev
)
3365 options
->abbrev
= 40;
3367 else if ((argcount
= parse_long_opt("src-prefix", av
, &optarg
))) {
3368 options
->a_prefix
= optarg
;
3371 else if ((argcount
= parse_long_opt("dst-prefix", av
, &optarg
))) {
3372 options
->b_prefix
= optarg
;
3375 else if (!strcmp(arg
, "--no-prefix"))
3376 options
->a_prefix
= options
->b_prefix
= "";
3377 else if (opt_arg(arg
, '\0', "inter-hunk-context",
3378 &options
->interhunkcontext
))
3380 else if ((argcount
= parse_long_opt("output", av
, &optarg
))) {
3381 options
->file
= fopen(optarg
, "w");
3383 die_errno("Could not open '%s'", optarg
);
3384 options
->close_file
= 1;
3391 int parse_rename_score(const char **cp_p
)
3393 unsigned long num
, scale
;
3395 const char *cp
= *cp_p
;
3402 if ( !dot
&& ch
== '.' ) {
3405 } else if ( ch
== '%' ) {
3406 scale
= dot
? scale
*100 : 100;
3407 cp
++; /* % is always at the end */
3409 } else if ( ch
>= '0' && ch
<= '9' ) {
3410 if ( scale
< 100000 ) {
3412 num
= (num
*10) + (ch
-'0');
3421 /* user says num divided by scale and we say internally that
3422 * is MAX_SCORE * num / scale.
3424 return (int)((num
>= scale
) ? MAX_SCORE
: (MAX_SCORE
* num
/ scale
));
3427 static int diff_scoreopt_parse(const char *opt
)
3429 int opt1
, opt2
, cmd
;
3435 /* convert the long-form arguments into short-form versions */
3436 if (!prefixcmp(opt
, "break-rewrites")) {
3437 opt
+= strlen("break-rewrites");
3438 if (*opt
== 0 || *opt
++ == '=')
3440 } else if (!prefixcmp(opt
, "find-copies")) {
3441 opt
+= strlen("find-copies");
3442 if (*opt
== 0 || *opt
++ == '=')
3444 } else if (!prefixcmp(opt
, "find-renames")) {
3445 opt
+= strlen("find-renames");
3446 if (*opt
== 0 || *opt
++ == '=')
3450 if (cmd
!= 'M' && cmd
!= 'C' && cmd
!= 'B')
3451 return -1; /* that is not a -M, -C nor -B option */
3453 opt1
= parse_rename_score(&opt
);
3459 else if (*opt
!= '/')
3460 return -1; /* we expect -B80/99 or -B80 */
3463 opt2
= parse_rename_score(&opt
);
3468 return opt1
| (opt2
<< 16);
3471 struct diff_queue_struct diff_queued_diff
;
3473 void diff_q(struct diff_queue_struct
*queue
, struct diff_filepair
*dp
)
3475 if (queue
->alloc
<= queue
->nr
) {
3476 queue
->alloc
= alloc_nr(queue
->alloc
);
3477 queue
->queue
= xrealloc(queue
->queue
,
3478 sizeof(dp
) * queue
->alloc
);
3480 queue
->queue
[queue
->nr
++] = dp
;
3483 struct diff_filepair
*diff_queue(struct diff_queue_struct
*queue
,
3484 struct diff_filespec
*one
,
3485 struct diff_filespec
*two
)
3487 struct diff_filepair
*dp
= xcalloc(1, sizeof(*dp
));
3495 void diff_free_filepair(struct diff_filepair
*p
)
3497 free_filespec(p
->one
);
3498 free_filespec(p
->two
);
3502 /* This is different from find_unique_abbrev() in that
3503 * it stuffs the result with dots for alignment.
3505 const char *diff_unique_abbrev(const unsigned char *sha1
, int len
)
3510 return sha1_to_hex(sha1
);
3512 abbrev
= find_unique_abbrev(sha1
, len
);
3513 abblen
= strlen(abbrev
);
3515 static char hex
[41];
3516 if (len
< abblen
&& abblen
<= len
+ 2)
3517 sprintf(hex
, "%s%.*s", abbrev
, len
+3-abblen
, "..");
3519 sprintf(hex
, "%s...", abbrev
);
3522 return sha1_to_hex(sha1
);
3525 static void diff_flush_raw(struct diff_filepair
*p
, struct diff_options
*opt
)
3527 int line_termination
= opt
->line_termination
;
3528 int inter_name_termination
= line_termination
? '\t' : '\0';
3529 if (opt
->output_prefix
) {
3530 struct strbuf
*msg
= NULL
;
3531 msg
= opt
->output_prefix(opt
, opt
->output_prefix_data
);
3532 fprintf(opt
->file
, "%s", msg
->buf
);
3535 if (!(opt
->output_format
& DIFF_FORMAT_NAME_STATUS
)) {
3536 fprintf(opt
->file
, ":%06o %06o %s ", p
->one
->mode
, p
->two
->mode
,
3537 diff_unique_abbrev(p
->one
->sha1
, opt
->abbrev
));
3538 fprintf(opt
->file
, "%s ", diff_unique_abbrev(p
->two
->sha1
, opt
->abbrev
));
3541 fprintf(opt
->file
, "%c%03d%c", p
->status
, similarity_index(p
),
3542 inter_name_termination
);
3544 fprintf(opt
->file
, "%c%c", p
->status
, inter_name_termination
);
3547 if (p
->status
== DIFF_STATUS_COPIED
||
3548 p
->status
== DIFF_STATUS_RENAMED
) {
3549 const char *name_a
, *name_b
;
3550 name_a
= p
->one
->path
;
3551 name_b
= p
->two
->path
;
3552 strip_prefix(opt
->prefix_length
, &name_a
, &name_b
);
3553 write_name_quoted(name_a
, opt
->file
, inter_name_termination
);
3554 write_name_quoted(name_b
, opt
->file
, line_termination
);
3556 const char *name_a
, *name_b
;
3557 name_a
= p
->one
->mode
? p
->one
->path
: p
->two
->path
;
3559 strip_prefix(opt
->prefix_length
, &name_a
, &name_b
);
3560 write_name_quoted(name_a
, opt
->file
, line_termination
);
3564 int diff_unmodified_pair(struct diff_filepair
*p
)
3566 /* This function is written stricter than necessary to support
3567 * the currently implemented transformers, but the idea is to
3568 * let transformers to produce diff_filepairs any way they want,
3569 * and filter and clean them up here before producing the output.
3571 struct diff_filespec
*one
= p
->one
, *two
= p
->two
;
3573 if (DIFF_PAIR_UNMERGED(p
))
3574 return 0; /* unmerged is interesting */
3576 /* deletion, addition, mode or type change
3577 * and rename are all interesting.
3579 if (DIFF_FILE_VALID(one
) != DIFF_FILE_VALID(two
) ||
3580 DIFF_PAIR_MODE_CHANGED(p
) ||
3581 strcmp(one
->path
, two
->path
))
3584 /* both are valid and point at the same path. that is, we are
3585 * dealing with a change.
3587 if (one
->sha1_valid
&& two
->sha1_valid
&&
3588 !hashcmp(one
->sha1
, two
->sha1
) &&
3589 !one
->dirty_submodule
&& !two
->dirty_submodule
)
3590 return 1; /* no change */
3591 if (!one
->sha1_valid
&& !two
->sha1_valid
)
3592 return 1; /* both look at the same file on the filesystem. */
3596 static void diff_flush_patch(struct diff_filepair
*p
, struct diff_options
*o
)
3598 if (diff_unmodified_pair(p
))
3601 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
3602 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
3603 return; /* no tree diffs in patch format */
3608 static void diff_flush_stat(struct diff_filepair
*p
, struct diff_options
*o
,
3609 struct diffstat_t
*diffstat
)
3611 if (diff_unmodified_pair(p
))
3614 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
3615 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
3616 return; /* no useful stat for tree diffs */
3618 run_diffstat(p
, o
, diffstat
);
3621 static void diff_flush_checkdiff(struct diff_filepair
*p
,
3622 struct diff_options
*o
)
3624 if (diff_unmodified_pair(p
))
3627 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
3628 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
3629 return; /* nothing to check in tree diffs */
3631 run_checkdiff(p
, o
);
3634 int diff_queue_is_empty(void)
3636 struct diff_queue_struct
*q
= &diff_queued_diff
;
3638 for (i
= 0; i
< q
->nr
; i
++)
3639 if (!diff_unmodified_pair(q
->queue
[i
]))
3645 void diff_debug_filespec(struct diff_filespec
*s
, int x
, const char *one
)
3647 fprintf(stderr
, "queue[%d] %s (%s) %s %06o %s\n",
3650 DIFF_FILE_VALID(s
) ? "valid" : "invalid",
3652 s
->sha1_valid
? sha1_to_hex(s
->sha1
) : "");
3653 fprintf(stderr
, "queue[%d] %s size %lu flags %d\n",
3655 s
->size
, s
->xfrm_flags
);
3658 void diff_debug_filepair(const struct diff_filepair
*p
, int i
)
3660 diff_debug_filespec(p
->one
, i
, "one");
3661 diff_debug_filespec(p
->two
, i
, "two");
3662 fprintf(stderr
, "score %d, status %c rename_used %d broken %d\n",
3663 p
->score
, p
->status
? p
->status
: '?',
3664 p
->one
->rename_used
, p
->broken_pair
);
3667 void diff_debug_queue(const char *msg
, struct diff_queue_struct
*q
)
3671 fprintf(stderr
, "%s\n", msg
);
3672 fprintf(stderr
, "q->nr = %d\n", q
->nr
);
3673 for (i
= 0; i
< q
->nr
; i
++) {
3674 struct diff_filepair
*p
= q
->queue
[i
];
3675 diff_debug_filepair(p
, i
);
3680 static void diff_resolve_rename_copy(void)
3683 struct diff_filepair
*p
;
3684 struct diff_queue_struct
*q
= &diff_queued_diff
;
3686 diff_debug_queue("resolve-rename-copy", q
);
3688 for (i
= 0; i
< q
->nr
; i
++) {
3690 p
->status
= 0; /* undecided */
3691 if (DIFF_PAIR_UNMERGED(p
))
3692 p
->status
= DIFF_STATUS_UNMERGED
;
3693 else if (!DIFF_FILE_VALID(p
->one
))
3694 p
->status
= DIFF_STATUS_ADDED
;
3695 else if (!DIFF_FILE_VALID(p
->two
))
3696 p
->status
= DIFF_STATUS_DELETED
;
3697 else if (DIFF_PAIR_TYPE_CHANGED(p
))
3698 p
->status
= DIFF_STATUS_TYPE_CHANGED
;
3700 /* from this point on, we are dealing with a pair
3701 * whose both sides are valid and of the same type, i.e.
3702 * either in-place edit or rename/copy edit.
3704 else if (DIFF_PAIR_RENAME(p
)) {
3706 * A rename might have re-connected a broken
3707 * pair up, causing the pathnames to be the
3708 * same again. If so, that's not a rename at
3709 * all, just a modification..
3711 * Otherwise, see if this source was used for
3712 * multiple renames, in which case we decrement
3713 * the count, and call it a copy.
3715 if (!strcmp(p
->one
->path
, p
->two
->path
))
3716 p
->status
= DIFF_STATUS_MODIFIED
;
3717 else if (--p
->one
->rename_used
> 0)
3718 p
->status
= DIFF_STATUS_COPIED
;
3720 p
->status
= DIFF_STATUS_RENAMED
;
3722 else if (hashcmp(p
->one
->sha1
, p
->two
->sha1
) ||
3723 p
->one
->mode
!= p
->two
->mode
||
3724 p
->one
->dirty_submodule
||
3725 p
->two
->dirty_submodule
||
3726 is_null_sha1(p
->one
->sha1
))
3727 p
->status
= DIFF_STATUS_MODIFIED
;
3729 /* This is a "no-change" entry and should not
3730 * happen anymore, but prepare for broken callers.
3732 error("feeding unmodified %s to diffcore",
3734 p
->status
= DIFF_STATUS_UNKNOWN
;
3737 diff_debug_queue("resolve-rename-copy done", q
);
3740 static int check_pair_status(struct diff_filepair
*p
)
3742 switch (p
->status
) {
3743 case DIFF_STATUS_UNKNOWN
:
3746 die("internal error in diff-resolve-rename-copy");
3752 static void flush_one_pair(struct diff_filepair
*p
, struct diff_options
*opt
)
3754 int fmt
= opt
->output_format
;
3756 if (fmt
& DIFF_FORMAT_CHECKDIFF
)
3757 diff_flush_checkdiff(p
, opt
);
3758 else if (fmt
& (DIFF_FORMAT_RAW
| DIFF_FORMAT_NAME_STATUS
))
3759 diff_flush_raw(p
, opt
);
3760 else if (fmt
& DIFF_FORMAT_NAME
) {
3761 const char *name_a
, *name_b
;
3762 name_a
= p
->two
->path
;
3764 strip_prefix(opt
->prefix_length
, &name_a
, &name_b
);
3765 write_name_quoted(name_a
, opt
->file
, opt
->line_termination
);
3769 static void show_file_mode_name(FILE *file
, const char *newdelete
, struct diff_filespec
*fs
)
3772 fprintf(file
, " %s mode %06o ", newdelete
, fs
->mode
);
3774 fprintf(file
, " %s ", newdelete
);
3775 write_name_quoted(fs
->path
, file
, '\n');
3779 static void show_mode_change(FILE *file
, struct diff_filepair
*p
, int show_name
,
3780 const char *line_prefix
)
3782 if (p
->one
->mode
&& p
->two
->mode
&& p
->one
->mode
!= p
->two
->mode
) {
3783 fprintf(file
, "%s mode change %06o => %06o%c", line_prefix
, p
->one
->mode
,
3784 p
->two
->mode
, show_name
? ' ' : '\n');
3786 write_name_quoted(p
->two
->path
, file
, '\n');
3791 static void show_rename_copy(FILE *file
, const char *renamecopy
, struct diff_filepair
*p
,
3792 const char *line_prefix
)
3794 char *names
= pprint_rename(p
->one
->path
, p
->two
->path
);
3796 fprintf(file
, " %s %s (%d%%)\n", renamecopy
, names
, similarity_index(p
));
3798 show_mode_change(file
, p
, 0, line_prefix
);
3801 static void diff_summary(struct diff_options
*opt
, struct diff_filepair
*p
)
3803 FILE *file
= opt
->file
;
3804 char *line_prefix
= "";
3806 if (opt
->output_prefix
) {
3807 struct strbuf
*buf
= opt
->output_prefix(opt
, opt
->output_prefix_data
);
3808 line_prefix
= buf
->buf
;
3812 case DIFF_STATUS_DELETED
:
3813 fputs(line_prefix
, file
);
3814 show_file_mode_name(file
, "delete", p
->one
);
3816 case DIFF_STATUS_ADDED
:
3817 fputs(line_prefix
, file
);
3818 show_file_mode_name(file
, "create", p
->two
);
3820 case DIFF_STATUS_COPIED
:
3821 fputs(line_prefix
, file
);
3822 show_rename_copy(file
, "copy", p
, line_prefix
);
3824 case DIFF_STATUS_RENAMED
:
3825 fputs(line_prefix
, file
);
3826 show_rename_copy(file
, "rename", p
, line_prefix
);
3830 fprintf(file
, "%s rewrite ", line_prefix
);
3831 write_name_quoted(p
->two
->path
, file
, ' ');
3832 fprintf(file
, "(%d%%)\n", similarity_index(p
));
3834 show_mode_change(file
, p
, !p
->score
, line_prefix
);
3844 static int remove_space(char *line
, int len
)
3850 for (i
= 0; i
< len
; i
++)
3851 if (!isspace((c
= line
[i
])))
3857 static void patch_id_consume(void *priv
, char *line
, unsigned long len
)
3859 struct patch_id_t
*data
= priv
;
3862 /* Ignore line numbers when computing the SHA1 of the patch */
3863 if (!prefixcmp(line
, "@@ -"))
3866 new_len
= remove_space(line
, len
);
3868 git_SHA1_Update(data
->ctx
, line
, new_len
);
3869 data
->patchlen
+= new_len
;
3872 /* returns 0 upon success, and writes result into sha1 */
3873 static int diff_get_patch_id(struct diff_options
*options
, unsigned char *sha1
)
3875 struct diff_queue_struct
*q
= &diff_queued_diff
;
3878 struct patch_id_t data
;
3879 char buffer
[PATH_MAX
* 4 + 20];
3881 git_SHA1_Init(&ctx
);
3882 memset(&data
, 0, sizeof(struct patch_id_t
));
3885 for (i
= 0; i
< q
->nr
; i
++) {
3889 struct diff_filepair
*p
= q
->queue
[i
];
3892 memset(&xpp
, 0, sizeof(xpp
));
3893 memset(&xecfg
, 0, sizeof(xecfg
));
3895 return error("internal diff status error");
3896 if (p
->status
== DIFF_STATUS_UNKNOWN
)
3898 if (diff_unmodified_pair(p
))
3900 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
3901 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
3903 if (DIFF_PAIR_UNMERGED(p
))
3906 diff_fill_sha1_info(p
->one
);
3907 diff_fill_sha1_info(p
->two
);
3908 if (fill_mmfile(&mf1
, p
->one
) < 0 ||
3909 fill_mmfile(&mf2
, p
->two
) < 0)
3910 return error("unable to read files to diff");
3912 len1
= remove_space(p
->one
->path
, strlen(p
->one
->path
));
3913 len2
= remove_space(p
->two
->path
, strlen(p
->two
->path
));
3914 if (p
->one
->mode
== 0)
3915 len1
= snprintf(buffer
, sizeof(buffer
),
3916 "diff--gita/%.*sb/%.*s"
3923 len2
, p
->two
->path
);
3924 else if (p
->two
->mode
== 0)
3925 len1
= snprintf(buffer
, sizeof(buffer
),
3926 "diff--gita/%.*sb/%.*s"
3927 "deletedfilemode%06o"
3933 len1
, p
->one
->path
);
3935 len1
= snprintf(buffer
, sizeof(buffer
),
3936 "diff--gita/%.*sb/%.*s"
3942 len2
, p
->two
->path
);
3943 git_SHA1_Update(&ctx
, buffer
, len1
);
3945 if (diff_filespec_is_binary(p
->one
) ||
3946 diff_filespec_is_binary(p
->two
)) {
3947 git_SHA1_Update(&ctx
, sha1_to_hex(p
->one
->sha1
), 40);
3948 git_SHA1_Update(&ctx
, sha1_to_hex(p
->two
->sha1
), 40);
3955 xdi_diff_outf(&mf1
, &mf2
, patch_id_consume
, &data
,
3959 git_SHA1_Final(sha1
, &ctx
);
3963 int diff_flush_patch_id(struct diff_options
*options
, unsigned char *sha1
)
3965 struct diff_queue_struct
*q
= &diff_queued_diff
;
3967 int result
= diff_get_patch_id(options
, sha1
);
3969 for (i
= 0; i
< q
->nr
; i
++)
3970 diff_free_filepair(q
->queue
[i
]);
3973 DIFF_QUEUE_CLEAR(q
);
3978 static int is_summary_empty(const struct diff_queue_struct
*q
)
3982 for (i
= 0; i
< q
->nr
; i
++) {
3983 const struct diff_filepair
*p
= q
->queue
[i
];
3985 switch (p
->status
) {
3986 case DIFF_STATUS_DELETED
:
3987 case DIFF_STATUS_ADDED
:
3988 case DIFF_STATUS_COPIED
:
3989 case DIFF_STATUS_RENAMED
:
3994 if (p
->one
->mode
&& p
->two
->mode
&&
3995 p
->one
->mode
!= p
->two
->mode
)
4003 static const char rename_limit_warning
[] =
4004 "inexact rename detection was skipped due to too many files.";
4006 static const char degrade_cc_to_c_warning
[] =
4007 "only found copies from modified paths due to too many files.";
4009 static const char rename_limit_advice
[] =
4010 "you may want to set your %s variable to at least "
4011 "%d and retry the command.";
4013 void diff_warn_rename_limit(const char *varname
, int needed
, int degraded_cc
)
4016 warning(degrade_cc_to_c_warning
);
4018 warning(rename_limit_warning
);
4021 if (0 < needed
&& needed
< 32767)
4022 warning(rename_limit_advice
, varname
, needed
);
4025 void diff_flush(struct diff_options
*options
)
4027 struct diff_queue_struct
*q
= &diff_queued_diff
;
4028 int i
, output_format
= options
->output_format
;
4032 * Order: raw, stat, summary, patch
4033 * or: name/name-status/checkdiff (other bits clear)
4038 if (output_format
& (DIFF_FORMAT_RAW
|
4040 DIFF_FORMAT_NAME_STATUS
|
4041 DIFF_FORMAT_CHECKDIFF
)) {
4042 for (i
= 0; i
< q
->nr
; i
++) {
4043 struct diff_filepair
*p
= q
->queue
[i
];
4044 if (check_pair_status(p
))
4045 flush_one_pair(p
, options
);
4050 if (output_format
& (DIFF_FORMAT_DIFFSTAT
|DIFF_FORMAT_SHORTSTAT
|DIFF_FORMAT_NUMSTAT
)) {
4051 struct diffstat_t diffstat
;
4053 memset(&diffstat
, 0, sizeof(struct diffstat_t
));
4054 for (i
= 0; i
< q
->nr
; i
++) {
4055 struct diff_filepair
*p
= q
->queue
[i
];
4056 if (check_pair_status(p
))
4057 diff_flush_stat(p
, options
, &diffstat
);
4059 if (output_format
& DIFF_FORMAT_NUMSTAT
)
4060 show_numstat(&diffstat
, options
);
4061 if (output_format
& DIFF_FORMAT_DIFFSTAT
)
4062 show_stats(&diffstat
, options
);
4063 if (output_format
& DIFF_FORMAT_SHORTSTAT
)
4064 show_shortstats(&diffstat
, options
);
4065 free_diffstat_info(&diffstat
);
4068 if (output_format
& DIFF_FORMAT_DIRSTAT
)
4069 show_dirstat(options
);
4071 if (output_format
& DIFF_FORMAT_SUMMARY
&& !is_summary_empty(q
)) {
4072 for (i
= 0; i
< q
->nr
; i
++) {
4073 diff_summary(options
, q
->queue
[i
]);
4078 if (output_format
& DIFF_FORMAT_NO_OUTPUT
&&
4079 DIFF_OPT_TST(options
, EXIT_WITH_STATUS
) &&
4080 DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
)) {
4082 * run diff_flush_patch for the exit status. setting
4083 * options->file to /dev/null should be safe, becaue we
4084 * aren't supposed to produce any output anyway.
4086 if (options
->close_file
)
4087 fclose(options
->file
);
4088 options
->file
= fopen("/dev/null", "w");
4090 die_errno("Could not open /dev/null");
4091 options
->close_file
= 1;
4092 for (i
= 0; i
< q
->nr
; i
++) {
4093 struct diff_filepair
*p
= q
->queue
[i
];
4094 if (check_pair_status(p
))
4095 diff_flush_patch(p
, options
);
4096 if (options
->found_changes
)
4101 if (output_format
& DIFF_FORMAT_PATCH
) {
4103 putc(options
->line_termination
, options
->file
);
4104 if (options
->stat_sep
) {
4105 /* attach patch instead of inline */
4106 fputs(options
->stat_sep
, options
->file
);
4110 for (i
= 0; i
< q
->nr
; i
++) {
4111 struct diff_filepair
*p
= q
->queue
[i
];
4112 if (check_pair_status(p
))
4113 diff_flush_patch(p
, options
);
4117 if (output_format
& DIFF_FORMAT_CALLBACK
)
4118 options
->format_callback(q
, options
, options
->format_callback_data
);
4120 for (i
= 0; i
< q
->nr
; i
++)
4121 diff_free_filepair(q
->queue
[i
]);
4124 DIFF_QUEUE_CLEAR(q
);
4125 if (options
->close_file
)
4126 fclose(options
->file
);
4129 * Report the content-level differences with HAS_CHANGES;
4130 * diff_addremove/diff_change does not set the bit when
4131 * DIFF_FROM_CONTENTS is in effect (e.g. with -w).
4133 if (DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
)) {
4134 if (options
->found_changes
)
4135 DIFF_OPT_SET(options
, HAS_CHANGES
);
4137 DIFF_OPT_CLR(options
, HAS_CHANGES
);
4141 static void diffcore_apply_filter(const char *filter
)
4144 struct diff_queue_struct
*q
= &diff_queued_diff
;
4145 struct diff_queue_struct outq
;
4146 DIFF_QUEUE_CLEAR(&outq
);
4151 if (strchr(filter
, DIFF_STATUS_FILTER_AON
)) {
4153 for (i
= found
= 0; !found
&& i
< q
->nr
; i
++) {
4154 struct diff_filepair
*p
= q
->queue
[i
];
4155 if (((p
->status
== DIFF_STATUS_MODIFIED
) &&
4157 strchr(filter
, DIFF_STATUS_FILTER_BROKEN
)) ||
4159 strchr(filter
, DIFF_STATUS_MODIFIED
)))) ||
4160 ((p
->status
!= DIFF_STATUS_MODIFIED
) &&
4161 strchr(filter
, p
->status
)))
4167 /* otherwise we will clear the whole queue
4168 * by copying the empty outq at the end of this
4169 * function, but first clear the current entries
4172 for (i
= 0; i
< q
->nr
; i
++)
4173 diff_free_filepair(q
->queue
[i
]);
4176 /* Only the matching ones */
4177 for (i
= 0; i
< q
->nr
; i
++) {
4178 struct diff_filepair
*p
= q
->queue
[i
];
4180 if (((p
->status
== DIFF_STATUS_MODIFIED
) &&
4182 strchr(filter
, DIFF_STATUS_FILTER_BROKEN
)) ||
4184 strchr(filter
, DIFF_STATUS_MODIFIED
)))) ||
4185 ((p
->status
!= DIFF_STATUS_MODIFIED
) &&
4186 strchr(filter
, p
->status
)))
4189 diff_free_filepair(p
);
4196 /* Check whether two filespecs with the same mode and size are identical */
4197 static int diff_filespec_is_identical(struct diff_filespec
*one
,
4198 struct diff_filespec
*two
)
4200 if (S_ISGITLINK(one
->mode
))
4202 if (diff_populate_filespec(one
, 0))
4204 if (diff_populate_filespec(two
, 0))
4206 return !memcmp(one
->data
, two
->data
, one
->size
);
4209 static void diffcore_skip_stat_unmatch(struct diff_options
*diffopt
)
4212 struct diff_queue_struct
*q
= &diff_queued_diff
;
4213 struct diff_queue_struct outq
;
4214 DIFF_QUEUE_CLEAR(&outq
);
4216 for (i
= 0; i
< q
->nr
; i
++) {
4217 struct diff_filepair
*p
= q
->queue
[i
];
4220 * 1. Entries that come from stat info dirtiness
4221 * always have both sides (iow, not create/delete),
4222 * one side of the object name is unknown, with
4223 * the same mode and size. Keep the ones that
4224 * do not match these criteria. They have real
4227 * 2. At this point, the file is known to be modified,
4228 * with the same mode and size, and the object
4229 * name of one side is unknown. Need to inspect
4230 * the identical contents.
4232 if (!DIFF_FILE_VALID(p
->one
) || /* (1) */
4233 !DIFF_FILE_VALID(p
->two
) ||
4234 (p
->one
->sha1_valid
&& p
->two
->sha1_valid
) ||
4235 (p
->one
->mode
!= p
->two
->mode
) ||
4236 diff_populate_filespec(p
->one
, 1) ||
4237 diff_populate_filespec(p
->two
, 1) ||
4238 (p
->one
->size
!= p
->two
->size
) ||
4239 !diff_filespec_is_identical(p
->one
, p
->two
)) /* (2) */
4243 * The caller can subtract 1 from skip_stat_unmatch
4244 * to determine how many paths were dirty only
4245 * due to stat info mismatch.
4247 if (!DIFF_OPT_TST(diffopt
, NO_INDEX
))
4248 diffopt
->skip_stat_unmatch
++;
4249 diff_free_filepair(p
);
4256 static int diffnamecmp(const void *a_
, const void *b_
)
4258 const struct diff_filepair
*a
= *((const struct diff_filepair
**)a_
);
4259 const struct diff_filepair
*b
= *((const struct diff_filepair
**)b_
);
4260 const char *name_a
, *name_b
;
4262 name_a
= a
->one
? a
->one
->path
: a
->two
->path
;
4263 name_b
= b
->one
? b
->one
->path
: b
->two
->path
;
4264 return strcmp(name_a
, name_b
);
4267 void diffcore_fix_diff_index(struct diff_options
*options
)
4269 struct diff_queue_struct
*q
= &diff_queued_diff
;
4270 qsort(q
->queue
, q
->nr
, sizeof(q
->queue
[0]), diffnamecmp
);
4273 void diffcore_std(struct diff_options
*options
)
4275 if (options
->skip_stat_unmatch
)
4276 diffcore_skip_stat_unmatch(options
);
4277 if (!options
->found_follow
) {
4278 /* See try_to_follow_renames() in tree-diff.c */
4279 if (options
->break_opt
!= -1)
4280 diffcore_break(options
->break_opt
);
4281 if (options
->detect_rename
)
4282 diffcore_rename(options
);
4283 if (options
->break_opt
!= -1)
4284 diffcore_merge_broken();
4286 if (options
->pickaxe
)
4287 diffcore_pickaxe(options
);
4288 if (options
->orderfile
)
4289 diffcore_order(options
->orderfile
);
4290 if (!options
->found_follow
)
4291 /* See try_to_follow_renames() in tree-diff.c */
4292 diff_resolve_rename_copy();
4293 diffcore_apply_filter(options
->filter
);
4295 if (diff_queued_diff
.nr
&& !DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
))
4296 DIFF_OPT_SET(options
, HAS_CHANGES
);
4298 DIFF_OPT_CLR(options
, HAS_CHANGES
);
4300 options
->found_follow
= 0;
4303 int diff_result_code(struct diff_options
*opt
, int status
)
4307 diff_warn_rename_limit("diff.renamelimit",
4308 opt
->needed_rename_limit
,
4309 opt
->degraded_cc_to_c
);
4310 if (!DIFF_OPT_TST(opt
, EXIT_WITH_STATUS
) &&
4311 !(opt
->output_format
& DIFF_FORMAT_CHECKDIFF
))
4313 if (DIFF_OPT_TST(opt
, EXIT_WITH_STATUS
) &&
4314 DIFF_OPT_TST(opt
, HAS_CHANGES
))
4316 if ((opt
->output_format
& DIFF_FORMAT_CHECKDIFF
) &&
4317 DIFF_OPT_TST(opt
, CHECK_FAILED
))
4323 * Shall changes to this submodule be ignored?
4325 * Submodule changes can be configured to be ignored separately for each path,
4326 * but that configuration can be overridden from the command line.
4328 static int is_submodule_ignored(const char *path
, struct diff_options
*options
)
4331 unsigned orig_flags
= options
->flags
;
4332 if (!DIFF_OPT_TST(options
, OVERRIDE_SUBMODULE_CONFIG
))
4333 set_diffopt_flags_from_submodule_config(options
, path
);
4334 if (DIFF_OPT_TST(options
, IGNORE_SUBMODULES
))
4336 options
->flags
= orig_flags
;
4340 void diff_addremove(struct diff_options
*options
,
4341 int addremove
, unsigned mode
,
4342 const unsigned char *sha1
,
4343 const char *concatpath
, unsigned dirty_submodule
)
4345 struct diff_filespec
*one
, *two
;
4347 if (S_ISGITLINK(mode
) && is_submodule_ignored(concatpath
, options
))
4350 /* This may look odd, but it is a preparation for
4351 * feeding "there are unchanged files which should
4352 * not produce diffs, but when you are doing copy
4353 * detection you would need them, so here they are"
4354 * entries to the diff-core. They will be prefixed
4355 * with something like '=' or '*' (I haven't decided
4356 * which but should not make any difference).
4357 * Feeding the same new and old to diff_change()
4358 * also has the same effect.
4359 * Before the final output happens, they are pruned after
4360 * merged into rename/copy pairs as appropriate.
4362 if (DIFF_OPT_TST(options
, REVERSE_DIFF
))
4363 addremove
= (addremove
== '+' ? '-' :
4364 addremove
== '-' ? '+' : addremove
);
4366 if (options
->prefix
&&
4367 strncmp(concatpath
, options
->prefix
, options
->prefix_length
))
4370 one
= alloc_filespec(concatpath
);
4371 two
= alloc_filespec(concatpath
);
4373 if (addremove
!= '+')
4374 fill_filespec(one
, sha1
, mode
);
4375 if (addremove
!= '-') {
4376 fill_filespec(two
, sha1
, mode
);
4377 two
->dirty_submodule
= dirty_submodule
;
4380 diff_queue(&diff_queued_diff
, one
, two
);
4381 if (!DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
))
4382 DIFF_OPT_SET(options
, HAS_CHANGES
);
4385 void diff_change(struct diff_options
*options
,
4386 unsigned old_mode
, unsigned new_mode
,
4387 const unsigned char *old_sha1
,
4388 const unsigned char *new_sha1
,
4389 const char *concatpath
,
4390 unsigned old_dirty_submodule
, unsigned new_dirty_submodule
)
4392 struct diff_filespec
*one
, *two
;
4394 if (S_ISGITLINK(old_mode
) && S_ISGITLINK(new_mode
) &&
4395 is_submodule_ignored(concatpath
, options
))
4398 if (DIFF_OPT_TST(options
, REVERSE_DIFF
)) {
4400 const unsigned char *tmp_c
;
4401 tmp
= old_mode
; old_mode
= new_mode
; new_mode
= tmp
;
4402 tmp_c
= old_sha1
; old_sha1
= new_sha1
; new_sha1
= tmp_c
;
4403 tmp
= old_dirty_submodule
; old_dirty_submodule
= new_dirty_submodule
;
4404 new_dirty_submodule
= tmp
;
4407 if (options
->prefix
&&
4408 strncmp(concatpath
, options
->prefix
, options
->prefix_length
))
4411 one
= alloc_filespec(concatpath
);
4412 two
= alloc_filespec(concatpath
);
4413 fill_filespec(one
, old_sha1
, old_mode
);
4414 fill_filespec(two
, new_sha1
, new_mode
);
4415 one
->dirty_submodule
= old_dirty_submodule
;
4416 two
->dirty_submodule
= new_dirty_submodule
;
4418 diff_queue(&diff_queued_diff
, one
, two
);
4419 if (!DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
))
4420 DIFF_OPT_SET(options
, HAS_CHANGES
);
4423 void diff_unmerge(struct diff_options
*options
,
4425 unsigned mode
, const unsigned char *sha1
)
4427 struct diff_filespec
*one
, *two
;
4429 if (options
->prefix
&&
4430 strncmp(path
, options
->prefix
, options
->prefix_length
))
4433 one
= alloc_filespec(path
);
4434 two
= alloc_filespec(path
);
4435 fill_filespec(one
, sha1
, mode
);
4436 diff_queue(&diff_queued_diff
, one
, two
)->is_unmerged
= 1;
4439 static char *run_textconv(const char *pgm
, struct diff_filespec
*spec
,
4442 struct diff_tempfile
*temp
;
4443 const char *argv
[3];
4444 const char **arg
= argv
;
4445 struct child_process child
;
4446 struct strbuf buf
= STRBUF_INIT
;
4449 temp
= prepare_temp_file(spec
->path
, spec
);
4451 *arg
++ = temp
->name
;
4454 memset(&child
, 0, sizeof(child
));
4455 child
.use_shell
= 1;
4458 if (start_command(&child
)) {
4463 if (strbuf_read(&buf
, child
.out
, 0) < 0)
4464 err
= error("error reading from textconv command '%s'", pgm
);
4467 if (finish_command(&child
) || err
) {
4468 strbuf_release(&buf
);
4474 return strbuf_detach(&buf
, outsize
);
4477 size_t fill_textconv(struct userdiff_driver
*driver
,
4478 struct diff_filespec
*df
,
4483 if (!driver
|| !driver
->textconv
) {
4484 if (!DIFF_FILE_VALID(df
)) {
4488 if (diff_populate_filespec(df
, 0))
4489 die("unable to read files to diff");
4494 if (driver
->textconv_cache
&& df
->sha1_valid
) {
4495 *outbuf
= notes_cache_get(driver
->textconv_cache
, df
->sha1
,
4501 *outbuf
= run_textconv(driver
->textconv
, df
, &size
);
4503 die("unable to read files to diff");
4505 if (driver
->textconv_cache
&& df
->sha1_valid
) {
4506 /* ignore errors, as we might be in a readonly repository */
4507 notes_cache_put(driver
->textconv_cache
, df
->sha1
, *outbuf
,
4510 * we could save up changes and flush them all at the end,
4511 * but we would need an extra call after all diffing is done.
4512 * Since generating a cache entry is the slow path anyway,
4513 * this extra overhead probably isn't a big deal.
4515 notes_cache_write(driver
->textconv_cache
);