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
= 200;
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 print_line_count(o
->file
, lc_a
);
585 fprintf(o
->file
, " +");
586 print_line_count(o
->file
, lc_b
);
587 fprintf(o
->file
, " @@%s\n", reset
);
589 emit_rewrite_lines(&ecbdata
, '-', data_one
, size_one
);
591 emit_rewrite_lines(&ecbdata
, '+', data_two
, size_two
);
593 free((char *)data_one
);
595 free((char *)data_two
);
598 struct diff_words_buffer
{
601 struct diff_words_orig
{
602 const char *begin
, *end
;
604 int orig_nr
, orig_alloc
;
607 static void diff_words_append(char *line
, unsigned long len
,
608 struct diff_words_buffer
*buffer
)
610 ALLOC_GROW(buffer
->text
.ptr
, buffer
->text
.size
+ len
, buffer
->alloc
);
613 memcpy(buffer
->text
.ptr
+ buffer
->text
.size
, line
, len
);
614 buffer
->text
.size
+= len
;
615 buffer
->text
.ptr
[buffer
->text
.size
] = '\0';
618 struct diff_words_style_elem
{
621 const char *color
; /* NULL; filled in by the setup code if
622 * color is enabled */
625 struct diff_words_style
{
626 enum diff_words_type type
;
627 struct diff_words_style_elem
new, old
, ctx
;
631 struct diff_words_style diff_words_styles
[] = {
632 { DIFF_WORDS_PORCELAIN
, {"+", "\n"}, {"-", "\n"}, {" ", "\n"}, "~\n" },
633 { DIFF_WORDS_PLAIN
, {"{+", "+}"}, {"[-", "-]"}, {"", ""}, "\n" },
634 { DIFF_WORDS_COLOR
, {"", ""}, {"", ""}, {"", ""}, "\n" }
637 struct diff_words_data
{
638 struct diff_words_buffer minus
, plus
;
639 const char *current_plus
;
641 struct diff_options
*opt
;
643 enum diff_words_type type
;
644 struct diff_words_style
*style
;
647 static int fn_out_diff_words_write_helper(FILE *fp
,
648 struct diff_words_style_elem
*st_el
,
650 size_t count
, const char *buf
,
651 const char *line_prefix
)
656 char *p
= memchr(buf
, '\n', count
);
658 fputs(line_prefix
, fp
);
660 if (st_el
->color
&& fputs(st_el
->color
, fp
) < 0)
662 if (fputs(st_el
->prefix
, fp
) < 0 ||
663 fwrite(buf
, p
? p
- buf
: count
, 1, fp
) != 1 ||
664 fputs(st_el
->suffix
, fp
) < 0)
666 if (st_el
->color
&& *st_el
->color
667 && fputs(GIT_COLOR_RESET
, fp
) < 0)
672 if (fputs(newline
, fp
) < 0)
674 count
-= p
+ 1 - buf
;
682 * '--color-words' algorithm can be described as:
684 * 1. collect a the minus/plus lines of a diff hunk, divided into
685 * minus-lines and plus-lines;
687 * 2. break both minus-lines and plus-lines into words and
688 * place them into two mmfile_t with one word for each line;
690 * 3. use xdiff to run diff on the two mmfile_t to get the words level diff;
692 * And for the common parts of the both file, we output the plus side text.
693 * diff_words->current_plus is used to trace the current position of the plus file
694 * which printed. diff_words->last_minus is used to trace the last minus word
697 * For '--graph' to work with '--color-words', we need to output the graph prefix
698 * on each line of color words output. Generally, there are two conditions on
699 * which we should output the prefix.
701 * 1. diff_words->last_minus == 0 &&
702 * diff_words->current_plus == diff_words->plus.text.ptr
704 * that is: the plus text must start as a new line, and if there is no minus
705 * word printed, a graph prefix must be printed.
707 * 2. diff_words->current_plus > diff_words->plus.text.ptr &&
708 * *(diff_words->current_plus - 1) == '\n'
710 * that is: a graph prefix must be printed following a '\n'
712 static int color_words_output_graph_prefix(struct diff_words_data
*diff_words
)
714 if ((diff_words
->last_minus
== 0 &&
715 diff_words
->current_plus
== diff_words
->plus
.text
.ptr
) ||
716 (diff_words
->current_plus
> diff_words
->plus
.text
.ptr
&&
717 *(diff_words
->current_plus
- 1) == '\n')) {
724 static void fn_out_diff_words_aux(void *priv
, char *line
, unsigned long len
)
726 struct diff_words_data
*diff_words
= priv
;
727 struct diff_words_style
*style
= diff_words
->style
;
728 int minus_first
, minus_len
, plus_first
, plus_len
;
729 const char *minus_begin
, *minus_end
, *plus_begin
, *plus_end
;
730 struct diff_options
*opt
= diff_words
->opt
;
731 struct strbuf
*msgbuf
;
732 char *line_prefix
= "";
734 if (line
[0] != '@' || parse_hunk_header(line
, len
,
735 &minus_first
, &minus_len
, &plus_first
, &plus_len
))
739 if (opt
->output_prefix
) {
740 msgbuf
= opt
->output_prefix(opt
, opt
->output_prefix_data
);
741 line_prefix
= msgbuf
->buf
;
744 /* POSIX requires that first be decremented by one if len == 0... */
746 minus_begin
= diff_words
->minus
.orig
[minus_first
].begin
;
748 diff_words
->minus
.orig
[minus_first
+ minus_len
- 1].end
;
750 minus_begin
= minus_end
=
751 diff_words
->minus
.orig
[minus_first
].end
;
754 plus_begin
= diff_words
->plus
.orig
[plus_first
].begin
;
755 plus_end
= diff_words
->plus
.orig
[plus_first
+ plus_len
- 1].end
;
757 plus_begin
= plus_end
= diff_words
->plus
.orig
[plus_first
].end
;
759 if (color_words_output_graph_prefix(diff_words
)) {
760 fputs(line_prefix
, diff_words
->opt
->file
);
762 if (diff_words
->current_plus
!= plus_begin
) {
763 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
764 &style
->ctx
, style
->newline
,
765 plus_begin
- diff_words
->current_plus
,
766 diff_words
->current_plus
, line_prefix
);
767 if (*(plus_begin
- 1) == '\n')
768 fputs(line_prefix
, diff_words
->opt
->file
);
770 if (minus_begin
!= minus_end
) {
771 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
772 &style
->old
, style
->newline
,
773 minus_end
- minus_begin
, minus_begin
,
776 if (plus_begin
!= plus_end
) {
777 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
778 &style
->new, style
->newline
,
779 plus_end
- plus_begin
, plus_begin
,
783 diff_words
->current_plus
= plus_end
;
784 diff_words
->last_minus
= minus_first
;
787 /* This function starts looking at *begin, and returns 0 iff a word was found. */
788 static int find_word_boundaries(mmfile_t
*buffer
, regex_t
*word_regex
,
789 int *begin
, int *end
)
791 if (word_regex
&& *begin
< buffer
->size
) {
793 if (!regexec(word_regex
, buffer
->ptr
+ *begin
, 1, match
, 0)) {
794 char *p
= memchr(buffer
->ptr
+ *begin
+ match
[0].rm_so
,
795 '\n', match
[0].rm_eo
- match
[0].rm_so
);
796 *end
= p
? p
- buffer
->ptr
: match
[0].rm_eo
+ *begin
;
797 *begin
+= match
[0].rm_so
;
798 return *begin
>= *end
;
803 /* find the next word */
804 while (*begin
< buffer
->size
&& isspace(buffer
->ptr
[*begin
]))
806 if (*begin
>= buffer
->size
)
809 /* find the end of the word */
811 while (*end
< buffer
->size
&& !isspace(buffer
->ptr
[*end
]))
818 * This function splits the words in buffer->text, stores the list with
819 * newline separator into out, and saves the offsets of the original words
822 static void diff_words_fill(struct diff_words_buffer
*buffer
, mmfile_t
*out
,
831 /* fake an empty "0th" word */
832 ALLOC_GROW(buffer
->orig
, 1, buffer
->orig_alloc
);
833 buffer
->orig
[0].begin
= buffer
->orig
[0].end
= buffer
->text
.ptr
;
836 for (i
= 0; i
< buffer
->text
.size
; i
++) {
837 if (find_word_boundaries(&buffer
->text
, word_regex
, &i
, &j
))
840 /* store original boundaries */
841 ALLOC_GROW(buffer
->orig
, buffer
->orig_nr
+ 1,
843 buffer
->orig
[buffer
->orig_nr
].begin
= buffer
->text
.ptr
+ i
;
844 buffer
->orig
[buffer
->orig_nr
].end
= buffer
->text
.ptr
+ j
;
848 ALLOC_GROW(out
->ptr
, out
->size
+ j
- i
+ 1, alloc
);
849 memcpy(out
->ptr
+ out
->size
, buffer
->text
.ptr
+ i
, j
- i
);
850 out
->ptr
[out
->size
+ j
- i
] = '\n';
851 out
->size
+= j
- i
+ 1;
857 /* this executes the word diff on the accumulated buffers */
858 static void diff_words_show(struct diff_words_data
*diff_words
)
862 mmfile_t minus
, plus
;
863 struct diff_words_style
*style
= diff_words
->style
;
865 struct diff_options
*opt
= diff_words
->opt
;
866 struct strbuf
*msgbuf
;
867 char *line_prefix
= "";
870 if (opt
->output_prefix
) {
871 msgbuf
= opt
->output_prefix(opt
, opt
->output_prefix_data
);
872 line_prefix
= msgbuf
->buf
;
875 /* special case: only removal */
876 if (!diff_words
->plus
.text
.size
) {
877 fputs(line_prefix
, diff_words
->opt
->file
);
878 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
879 &style
->old
, style
->newline
,
880 diff_words
->minus
.text
.size
,
881 diff_words
->minus
.text
.ptr
, line_prefix
);
882 diff_words
->minus
.text
.size
= 0;
886 diff_words
->current_plus
= diff_words
->plus
.text
.ptr
;
887 diff_words
->last_minus
= 0;
889 memset(&xpp
, 0, sizeof(xpp
));
890 memset(&xecfg
, 0, sizeof(xecfg
));
891 diff_words_fill(&diff_words
->minus
, &minus
, diff_words
->word_regex
);
892 diff_words_fill(&diff_words
->plus
, &plus
, diff_words
->word_regex
);
894 /* as only the hunk header will be parsed, we need a 0-context */
896 xdi_diff_outf(&minus
, &plus
, fn_out_diff_words_aux
, diff_words
,
900 if (diff_words
->current_plus
!= diff_words
->plus
.text
.ptr
+
901 diff_words
->plus
.text
.size
) {
902 if (color_words_output_graph_prefix(diff_words
))
903 fputs(line_prefix
, diff_words
->opt
->file
);
904 fn_out_diff_words_write_helper(diff_words
->opt
->file
,
905 &style
->ctx
, style
->newline
,
906 diff_words
->plus
.text
.ptr
+ diff_words
->plus
.text
.size
907 - diff_words
->current_plus
, diff_words
->current_plus
,
910 diff_words
->minus
.text
.size
= diff_words
->plus
.text
.size
= 0;
913 /* In "color-words" mode, show word-diff of words accumulated in the buffer */
914 static void diff_words_flush(struct emit_callback
*ecbdata
)
916 if (ecbdata
->diff_words
->minus
.text
.size
||
917 ecbdata
->diff_words
->plus
.text
.size
)
918 diff_words_show(ecbdata
->diff_words
);
921 static void free_diff_words_data(struct emit_callback
*ecbdata
)
923 if (ecbdata
->diff_words
) {
924 diff_words_flush(ecbdata
);
925 free (ecbdata
->diff_words
->minus
.text
.ptr
);
926 free (ecbdata
->diff_words
->minus
.orig
);
927 free (ecbdata
->diff_words
->plus
.text
.ptr
);
928 free (ecbdata
->diff_words
->plus
.orig
);
929 if (ecbdata
->diff_words
->word_regex
) {
930 regfree(ecbdata
->diff_words
->word_regex
);
931 free(ecbdata
->diff_words
->word_regex
);
933 free(ecbdata
->diff_words
);
934 ecbdata
->diff_words
= NULL
;
938 const char *diff_get_color(int diff_use_color
, enum color_diff ix
)
941 return diff_colors
[ix
];
945 static unsigned long sane_truncate_line(struct emit_callback
*ecb
, char *line
, unsigned long len
)
952 return ecb
->truncate(line
, len
);
956 (void) utf8_width(&cp
, &l
);
958 break; /* truncated in the middle? */
963 static void find_lno(const char *line
, struct emit_callback
*ecbdata
)
966 ecbdata
->lno_in_preimage
= 0;
967 ecbdata
->lno_in_postimage
= 0;
968 p
= strchr(line
, '-');
970 return; /* cannot happen */
971 ecbdata
->lno_in_preimage
= strtol(p
+ 1, NULL
, 10);
974 return; /* cannot happen */
975 ecbdata
->lno_in_postimage
= strtol(p
+ 1, NULL
, 10);
978 static void fn_out_consume(void *priv
, char *line
, unsigned long len
)
980 struct emit_callback
*ecbdata
= priv
;
981 const char *meta
= diff_get_color(ecbdata
->color_diff
, DIFF_METAINFO
);
982 const char *plain
= diff_get_color(ecbdata
->color_diff
, DIFF_PLAIN
);
983 const char *reset
= diff_get_color(ecbdata
->color_diff
, DIFF_RESET
);
984 struct diff_options
*o
= ecbdata
->opt
;
985 char *line_prefix
= "";
986 struct strbuf
*msgbuf
;
988 if (o
&& o
->output_prefix
) {
989 msgbuf
= o
->output_prefix(o
, o
->output_prefix_data
);
990 line_prefix
= msgbuf
->buf
;
993 if (ecbdata
->header
) {
994 fprintf(ecbdata
->opt
->file
, "%s", ecbdata
->header
->buf
);
995 strbuf_reset(ecbdata
->header
);
996 ecbdata
->header
= NULL
;
998 *(ecbdata
->found_changesp
) = 1;
1000 if (ecbdata
->label_path
[0]) {
1001 const char *name_a_tab
, *name_b_tab
;
1003 name_a_tab
= strchr(ecbdata
->label_path
[0], ' ') ? "\t" : "";
1004 name_b_tab
= strchr(ecbdata
->label_path
[1], ' ') ? "\t" : "";
1006 fprintf(ecbdata
->opt
->file
, "%s%s--- %s%s%s\n",
1007 line_prefix
, meta
, ecbdata
->label_path
[0], reset
, name_a_tab
);
1008 fprintf(ecbdata
->opt
->file
, "%s%s+++ %s%s%s\n",
1009 line_prefix
, meta
, ecbdata
->label_path
[1], reset
, name_b_tab
);
1010 ecbdata
->label_path
[0] = ecbdata
->label_path
[1] = NULL
;
1013 if (diff_suppress_blank_empty
1014 && len
== 2 && line
[0] == ' ' && line
[1] == '\n') {
1019 if (line
[0] == '@') {
1020 if (ecbdata
->diff_words
)
1021 diff_words_flush(ecbdata
);
1022 len
= sane_truncate_line(ecbdata
, line
, len
);
1023 find_lno(line
, ecbdata
);
1024 emit_hunk_header(ecbdata
, line
, len
);
1025 if (line
[len
-1] != '\n')
1026 putc('\n', ecbdata
->opt
->file
);
1031 emit_line(ecbdata
->opt
, reset
, reset
, line
, len
);
1032 if (ecbdata
->diff_words
1033 && ecbdata
->diff_words
->type
== DIFF_WORDS_PORCELAIN
)
1034 fputs("~\n", ecbdata
->opt
->file
);
1038 if (ecbdata
->diff_words
) {
1039 if (line
[0] == '-') {
1040 diff_words_append(line
, len
,
1041 &ecbdata
->diff_words
->minus
);
1043 } else if (line
[0] == '+') {
1044 diff_words_append(line
, len
,
1045 &ecbdata
->diff_words
->plus
);
1048 diff_words_flush(ecbdata
);
1049 if (ecbdata
->diff_words
->type
== DIFF_WORDS_PORCELAIN
) {
1050 emit_line(ecbdata
->opt
, plain
, reset
, line
, len
);
1051 fputs("~\n", ecbdata
->opt
->file
);
1053 /* don't print the prefix character */
1054 emit_line(ecbdata
->opt
, plain
, reset
, line
+1, len
-1);
1059 if (line
[0] != '+') {
1061 diff_get_color(ecbdata
->color_diff
,
1062 line
[0] == '-' ? DIFF_FILE_OLD
: DIFF_PLAIN
);
1063 ecbdata
->lno_in_preimage
++;
1065 ecbdata
->lno_in_postimage
++;
1066 emit_line(ecbdata
->opt
, color
, reset
, line
, len
);
1068 ecbdata
->lno_in_postimage
++;
1069 emit_add_line(reset
, ecbdata
, line
+ 1, len
- 1);
1073 static char *pprint_rename(const char *a
, const char *b
)
1075 const char *old
= a
;
1076 const char *new = b
;
1077 struct strbuf name
= STRBUF_INIT
;
1078 int pfx_length
, sfx_length
;
1079 int len_a
= strlen(a
);
1080 int len_b
= strlen(b
);
1081 int a_midlen
, b_midlen
;
1082 int qlen_a
= quote_c_style(a
, NULL
, NULL
, 0);
1083 int qlen_b
= quote_c_style(b
, NULL
, NULL
, 0);
1085 if (qlen_a
|| qlen_b
) {
1086 quote_c_style(a
, &name
, NULL
, 0);
1087 strbuf_addstr(&name
, " => ");
1088 quote_c_style(b
, &name
, NULL
, 0);
1089 return strbuf_detach(&name
, NULL
);
1092 /* Find common prefix */
1094 while (*old
&& *new && *old
== *new) {
1096 pfx_length
= old
- a
+ 1;
1101 /* Find common suffix */
1105 while (a
<= old
&& b
<= new && *old
== *new) {
1107 sfx_length
= len_a
- (old
- a
);
1113 * pfx{mid-a => mid-b}sfx
1114 * {pfx-a => pfx-b}sfx
1115 * pfx{sfx-a => sfx-b}
1118 a_midlen
= len_a
- pfx_length
- sfx_length
;
1119 b_midlen
= len_b
- pfx_length
- sfx_length
;
1125 strbuf_grow(&name
, pfx_length
+ a_midlen
+ b_midlen
+ sfx_length
+ 7);
1126 if (pfx_length
+ sfx_length
) {
1127 strbuf_add(&name
, a
, pfx_length
);
1128 strbuf_addch(&name
, '{');
1130 strbuf_add(&name
, a
+ pfx_length
, a_midlen
);
1131 strbuf_addstr(&name
, " => ");
1132 strbuf_add(&name
, b
+ pfx_length
, b_midlen
);
1133 if (pfx_length
+ sfx_length
) {
1134 strbuf_addch(&name
, '}');
1135 strbuf_add(&name
, a
+ len_a
- sfx_length
, sfx_length
);
1137 return strbuf_detach(&name
, NULL
);
1143 struct diffstat_file
{
1147 unsigned is_unmerged
:1;
1148 unsigned is_binary
:1;
1149 unsigned is_renamed
:1;
1150 uintmax_t added
, deleted
;
1154 static struct diffstat_file
*diffstat_add(struct diffstat_t
*diffstat
,
1158 struct diffstat_file
*x
;
1159 x
= xcalloc(sizeof (*x
), 1);
1160 if (diffstat
->nr
== diffstat
->alloc
) {
1161 diffstat
->alloc
= alloc_nr(diffstat
->alloc
);
1162 diffstat
->files
= xrealloc(diffstat
->files
,
1163 diffstat
->alloc
* sizeof(x
));
1165 diffstat
->files
[diffstat
->nr
++] = x
;
1167 x
->from_name
= xstrdup(name_a
);
1168 x
->name
= xstrdup(name_b
);
1172 x
->from_name
= NULL
;
1173 x
->name
= xstrdup(name_a
);
1178 static void diffstat_consume(void *priv
, char *line
, unsigned long len
)
1180 struct diffstat_t
*diffstat
= priv
;
1181 struct diffstat_file
*x
= diffstat
->files
[diffstat
->nr
- 1];
1185 else if (line
[0] == '-')
1189 const char mime_boundary_leader
[] = "------------";
1191 static int scale_linear(int it
, int width
, int max_change
)
1194 * make sure that at least one '-' is printed if there were deletions,
1195 * and likewise for '+'.
1199 return ((it
- 1) * (width
- 1) + max_change
- 1) / (max_change
- 1);
1202 static void show_name(FILE *file
,
1203 const char *prefix
, const char *name
, int len
)
1205 fprintf(file
, " %s%-*s |", prefix
, len
, name
);
1208 static void show_graph(FILE *file
, char ch
, int cnt
, const char *set
, const char *reset
)
1212 fprintf(file
, "%s", set
);
1215 fprintf(file
, "%s", reset
);
1218 static void fill_print_name(struct diffstat_file
*file
)
1222 if (file
->print_name
)
1225 if (!file
->is_renamed
) {
1226 struct strbuf buf
= STRBUF_INIT
;
1227 if (quote_c_style(file
->name
, &buf
, NULL
, 0)) {
1228 pname
= strbuf_detach(&buf
, NULL
);
1231 strbuf_release(&buf
);
1234 pname
= pprint_rename(file
->from_name
, file
->name
);
1236 file
->print_name
= pname
;
1239 static void show_stats(struct diffstat_t
*data
, struct diff_options
*options
)
1241 int i
, len
, add
, del
, adds
= 0, dels
= 0;
1242 uintmax_t max_change
= 0, max_len
= 0;
1243 int total_files
= data
->nr
;
1244 int width
, name_width
;
1245 const char *reset
, *set
, *add_c
, *del_c
;
1246 const char *line_prefix
= "";
1247 struct strbuf
*msg
= NULL
;
1252 if (options
->output_prefix
) {
1253 msg
= options
->output_prefix(options
, options
->output_prefix_data
);
1254 line_prefix
= msg
->buf
;
1257 width
= options
->stat_width
? options
->stat_width
: 80;
1258 name_width
= options
->stat_name_width
? options
->stat_name_width
: 50;
1260 /* Sanity: give at least 5 columns to the graph,
1261 * but leave at least 10 columns for the name.
1265 if (name_width
< 10)
1267 else if (width
< name_width
+ 15)
1268 name_width
= width
- 15;
1270 /* Find the longest filename and max number of changes */
1271 reset
= diff_get_color_opt(options
, DIFF_RESET
);
1272 set
= diff_get_color_opt(options
, DIFF_PLAIN
);
1273 add_c
= diff_get_color_opt(options
, DIFF_FILE_NEW
);
1274 del_c
= diff_get_color_opt(options
, DIFF_FILE_OLD
);
1276 for (i
= 0; i
< data
->nr
; i
++) {
1277 struct diffstat_file
*file
= data
->files
[i
];
1278 uintmax_t change
= file
->added
+ file
->deleted
;
1279 fill_print_name(file
);
1280 len
= strlen(file
->print_name
);
1284 if (file
->is_binary
|| file
->is_unmerged
)
1286 if (max_change
< change
)
1287 max_change
= change
;
1290 /* Compute the width of the graph part;
1291 * 10 is for one blank at the beginning of the line plus
1292 * " | count " between the name and the graph.
1294 * From here on, name_width is the width of the name area,
1295 * and width is the width of the graph area.
1297 name_width
= (name_width
< max_len
) ? name_width
: max_len
;
1298 if (width
< (name_width
+ 10) + max_change
)
1299 width
= width
- (name_width
+ 10);
1303 for (i
= 0; i
< data
->nr
; i
++) {
1304 const char *prefix
= "";
1305 char *name
= data
->files
[i
]->print_name
;
1306 uintmax_t added
= data
->files
[i
]->added
;
1307 uintmax_t deleted
= data
->files
[i
]->deleted
;
1311 * "scale" the filename
1314 name_len
= strlen(name
);
1315 if (name_width
< name_len
) {
1319 name
+= name_len
- len
;
1320 slash
= strchr(name
, '/');
1325 if (data
->files
[i
]->is_binary
) {
1326 fprintf(options
->file
, "%s", line_prefix
);
1327 show_name(options
->file
, prefix
, name
, len
);
1328 fprintf(options
->file
, " Bin ");
1329 fprintf(options
->file
, "%s%"PRIuMAX
"%s",
1330 del_c
, deleted
, reset
);
1331 fprintf(options
->file
, " -> ");
1332 fprintf(options
->file
, "%s%"PRIuMAX
"%s",
1333 add_c
, added
, reset
);
1334 fprintf(options
->file
, " bytes");
1335 fprintf(options
->file
, "\n");
1338 else if (data
->files
[i
]->is_unmerged
) {
1339 fprintf(options
->file
, "%s", line_prefix
);
1340 show_name(options
->file
, prefix
, name
, len
);
1341 fprintf(options
->file
, " Unmerged\n");
1344 else if (!data
->files
[i
]->is_renamed
&&
1345 (added
+ deleted
== 0)) {
1351 * scale the add/delete
1358 if (width
<= max_change
) {
1359 add
= scale_linear(add
, width
, max_change
);
1360 del
= scale_linear(del
, width
, max_change
);
1362 fprintf(options
->file
, "%s", line_prefix
);
1363 show_name(options
->file
, prefix
, name
, len
);
1364 fprintf(options
->file
, "%5"PRIuMAX
"%s", added
+ deleted
,
1365 added
+ deleted
? " " : "");
1366 show_graph(options
->file
, '+', add
, add_c
, reset
);
1367 show_graph(options
->file
, '-', del
, del_c
, reset
);
1368 fprintf(options
->file
, "\n");
1370 fprintf(options
->file
, "%s", line_prefix
);
1371 fprintf(options
->file
,
1372 " %d files changed, %d insertions(+), %d deletions(-)\n",
1373 total_files
, adds
, dels
);
1376 static void show_shortstats(struct diffstat_t
*data
, struct diff_options
*options
)
1378 int i
, adds
= 0, dels
= 0, total_files
= data
->nr
;
1383 for (i
= 0; i
< data
->nr
; i
++) {
1384 if (!data
->files
[i
]->is_binary
&&
1385 !data
->files
[i
]->is_unmerged
) {
1386 int added
= data
->files
[i
]->added
;
1387 int deleted
= data
->files
[i
]->deleted
;
1388 if (!data
->files
[i
]->is_renamed
&&
1389 (added
+ deleted
== 0)) {
1397 if (options
->output_prefix
) {
1398 struct strbuf
*msg
= NULL
;
1399 msg
= options
->output_prefix(options
,
1400 options
->output_prefix_data
);
1401 fprintf(options
->file
, "%s", msg
->buf
);
1403 fprintf(options
->file
, " %d files changed, %d insertions(+), %d deletions(-)\n",
1404 total_files
, adds
, dels
);
1407 static void show_numstat(struct diffstat_t
*data
, struct diff_options
*options
)
1414 for (i
= 0; i
< data
->nr
; i
++) {
1415 struct diffstat_file
*file
= data
->files
[i
];
1417 if (options
->output_prefix
) {
1418 struct strbuf
*msg
= NULL
;
1419 msg
= options
->output_prefix(options
,
1420 options
->output_prefix_data
);
1421 fprintf(options
->file
, "%s", msg
->buf
);
1424 if (file
->is_binary
)
1425 fprintf(options
->file
, "-\t-\t");
1427 fprintf(options
->file
,
1428 "%"PRIuMAX
"\t%"PRIuMAX
"\t",
1429 file
->added
, file
->deleted
);
1430 if (options
->line_termination
) {
1431 fill_print_name(file
);
1432 if (!file
->is_renamed
)
1433 write_name_quoted(file
->name
, options
->file
,
1434 options
->line_termination
);
1436 fputs(file
->print_name
, options
->file
);
1437 putc(options
->line_termination
, options
->file
);
1440 if (file
->is_renamed
) {
1441 putc('\0', options
->file
);
1442 write_name_quoted(file
->from_name
, options
->file
, '\0');
1444 write_name_quoted(file
->name
, options
->file
, '\0');
1449 struct dirstat_file
{
1451 unsigned long changed
;
1454 struct dirstat_dir
{
1455 struct dirstat_file
*files
;
1456 int alloc
, nr
, percent
, cumulative
;
1459 static long gather_dirstat(struct diff_options
*opt
, struct dirstat_dir
*dir
,
1460 unsigned long changed
, const char *base
, int baselen
)
1462 unsigned long this_dir
= 0;
1463 unsigned int sources
= 0;
1464 const char *line_prefix
= "";
1465 struct strbuf
*msg
= NULL
;
1467 if (opt
->output_prefix
) {
1468 msg
= opt
->output_prefix(opt
, opt
->output_prefix_data
);
1469 line_prefix
= msg
->buf
;
1473 struct dirstat_file
*f
= dir
->files
;
1474 int namelen
= strlen(f
->name
);
1478 if (namelen
< baselen
)
1480 if (memcmp(f
->name
, base
, baselen
))
1482 slash
= strchr(f
->name
+ baselen
, '/');
1484 int newbaselen
= slash
+ 1 - f
->name
;
1485 this = gather_dirstat(opt
, dir
, changed
, f
->name
, newbaselen
);
1497 * We don't report dirstat's for
1499 * - or cases where everything came from a single directory
1500 * under this directory (sources == 1).
1502 if (baselen
&& sources
!= 1) {
1503 int permille
= this_dir
* 1000 / changed
;
1505 int percent
= permille
/ 10;
1506 if (percent
>= dir
->percent
) {
1507 fprintf(opt
->file
, "%s%4d.%01d%% %.*s\n", line_prefix
,
1508 percent
, permille
% 10, baselen
, base
);
1509 if (!dir
->cumulative
)
1517 static int dirstat_compare(const void *_a
, const void *_b
)
1519 const struct dirstat_file
*a
= _a
;
1520 const struct dirstat_file
*b
= _b
;
1521 return strcmp(a
->name
, b
->name
);
1524 static void show_dirstat(struct diff_options
*options
)
1527 unsigned long changed
;
1528 struct dirstat_dir dir
;
1529 struct diff_queue_struct
*q
= &diff_queued_diff
;
1534 dir
.percent
= options
->dirstat_percent
;
1535 dir
.cumulative
= DIFF_OPT_TST(options
, DIRSTAT_CUMULATIVE
);
1538 for (i
= 0; i
< q
->nr
; i
++) {
1539 struct diff_filepair
*p
= q
->queue
[i
];
1541 unsigned long copied
, added
, damage
;
1542 int content_changed
;
1544 name
= p
->one
->path
? p
->one
->path
: p
->two
->path
;
1546 if (p
->one
->sha1_valid
&& p
->two
->sha1_valid
)
1547 content_changed
= hashcmp(p
->one
->sha1
, p
->two
->sha1
);
1549 content_changed
= 1;
1551 if (!content_changed
) {
1553 * The SHA1 has not changed, so pre-/post-content is
1554 * identical. We can therefore skip looking at the
1555 * file contents altogether.
1561 if (DIFF_OPT_TST(options
, DIRSTAT_BY_FILE
)) {
1563 * In --dirstat-by-file mode, we don't really need to
1564 * look at the actual file contents at all.
1565 * The fact that the SHA1 changed is enough for us to
1566 * add this file to the list of results
1567 * (with each file contributing equal damage).
1573 if (DIFF_FILE_VALID(p
->one
) && DIFF_FILE_VALID(p
->two
)) {
1574 diff_populate_filespec(p
->one
, 0);
1575 diff_populate_filespec(p
->two
, 0);
1576 diffcore_count_changes(p
->one
, p
->two
, NULL
, NULL
, 0,
1578 diff_free_filespec_data(p
->one
);
1579 diff_free_filespec_data(p
->two
);
1580 } else if (DIFF_FILE_VALID(p
->one
)) {
1581 diff_populate_filespec(p
->one
, 1);
1583 diff_free_filespec_data(p
->one
);
1584 } else if (DIFF_FILE_VALID(p
->two
)) {
1585 diff_populate_filespec(p
->two
, 1);
1587 added
= p
->two
->size
;
1588 diff_free_filespec_data(p
->two
);
1593 * Original minus copied is the removed material,
1594 * added is the new material. They are both damages
1595 * made to the preimage.
1596 * If the resulting damage is zero, we know that
1597 * diffcore_count_changes() considers the two entries to
1598 * be identical, but since content_changed is true, we
1599 * know that there must have been _some_ kind of change,
1600 * so we force all entries to have damage > 0.
1602 damage
= (p
->one
->size
- copied
) + added
;
1607 ALLOC_GROW(dir
.files
, dir
.nr
+ 1, dir
.alloc
);
1608 dir
.files
[dir
.nr
].name
= name
;
1609 dir
.files
[dir
.nr
].changed
= damage
;
1614 /* This can happen even with many files, if everything was renames */
1618 /* Show all directories with more than x% of the changes */
1619 qsort(dir
.files
, dir
.nr
, sizeof(dir
.files
[0]), dirstat_compare
);
1620 gather_dirstat(options
, &dir
, changed
, "", 0);
1623 static void free_diffstat_info(struct diffstat_t
*diffstat
)
1626 for (i
= 0; i
< diffstat
->nr
; i
++) {
1627 struct diffstat_file
*f
= diffstat
->files
[i
];
1628 if (f
->name
!= f
->print_name
)
1629 free(f
->print_name
);
1634 free(diffstat
->files
);
1637 struct checkdiff_t
{
1638 const char *filename
;
1640 int conflict_marker_size
;
1641 struct diff_options
*o
;
1646 static int is_conflict_marker(const char *line
, int marker_size
, unsigned long len
)
1651 if (len
< marker_size
+ 1)
1653 firstchar
= line
[0];
1654 switch (firstchar
) {
1655 case '=': case '>': case '<': case '|':
1660 for (cnt
= 1; cnt
< marker_size
; cnt
++)
1661 if (line
[cnt
] != firstchar
)
1663 /* line[1] thru line[marker_size-1] are same as firstchar */
1664 if (len
< marker_size
+ 1 || !isspace(line
[marker_size
]))
1669 static void checkdiff_consume(void *priv
, char *line
, unsigned long len
)
1671 struct checkdiff_t
*data
= priv
;
1672 int color_diff
= DIFF_OPT_TST(data
->o
, COLOR_DIFF
);
1673 int marker_size
= data
->conflict_marker_size
;
1674 const char *ws
= diff_get_color(color_diff
, DIFF_WHITESPACE
);
1675 const char *reset
= diff_get_color(color_diff
, DIFF_RESET
);
1676 const char *set
= diff_get_color(color_diff
, DIFF_FILE_NEW
);
1678 char *line_prefix
= "";
1679 struct strbuf
*msgbuf
;
1682 if (data
->o
->output_prefix
) {
1683 msgbuf
= data
->o
->output_prefix(data
->o
,
1684 data
->o
->output_prefix_data
);
1685 line_prefix
= msgbuf
->buf
;
1688 if (line
[0] == '+') {
1691 if (is_conflict_marker(line
+ 1, marker_size
, len
- 1)) {
1693 fprintf(data
->o
->file
,
1694 "%s%s:%d: leftover conflict marker\n",
1695 line_prefix
, data
->filename
, data
->lineno
);
1697 bad
= ws_check(line
+ 1, len
- 1, data
->ws_rule
);
1700 data
->status
|= bad
;
1701 err
= whitespace_error_string(bad
);
1702 fprintf(data
->o
->file
, "%s%s:%d: %s.\n",
1703 line_prefix
, data
->filename
, data
->lineno
, err
);
1705 emit_line(data
->o
, set
, reset
, line
, 1);
1706 ws_check_emit(line
+ 1, len
- 1, data
->ws_rule
,
1707 data
->o
->file
, set
, reset
, ws
);
1708 } else if (line
[0] == ' ') {
1710 } else if (line
[0] == '@') {
1711 char *plus
= strchr(line
, '+');
1713 data
->lineno
= strtol(plus
, NULL
, 10) - 1;
1715 die("invalid diff");
1719 static unsigned char *deflate_it(char *data
,
1721 unsigned long *result_size
)
1724 unsigned char *deflated
;
1727 memset(&stream
, 0, sizeof(stream
));
1728 deflateInit(&stream
, zlib_compression_level
);
1729 bound
= deflateBound(&stream
, size
);
1730 deflated
= xmalloc(bound
);
1731 stream
.next_out
= deflated
;
1732 stream
.avail_out
= bound
;
1734 stream
.next_in
= (unsigned char *)data
;
1735 stream
.avail_in
= size
;
1736 while (deflate(&stream
, Z_FINISH
) == Z_OK
)
1738 deflateEnd(&stream
);
1739 *result_size
= stream
.total_out
;
1743 static void emit_binary_diff_body(FILE *file
, mmfile_t
*one
, mmfile_t
*two
, char *prefix
)
1749 unsigned long orig_size
;
1750 unsigned long delta_size
;
1751 unsigned long deflate_size
;
1752 unsigned long data_size
;
1754 /* We could do deflated delta, or we could do just deflated two,
1755 * whichever is smaller.
1758 deflated
= deflate_it(two
->ptr
, two
->size
, &deflate_size
);
1759 if (one
->size
&& two
->size
) {
1760 delta
= diff_delta(one
->ptr
, one
->size
,
1761 two
->ptr
, two
->size
,
1762 &delta_size
, deflate_size
);
1764 void *to_free
= delta
;
1765 orig_size
= delta_size
;
1766 delta
= deflate_it(delta
, delta_size
, &delta_size
);
1771 if (delta
&& delta_size
< deflate_size
) {
1772 fprintf(file
, "%sdelta %lu\n", prefix
, orig_size
);
1775 data_size
= delta_size
;
1778 fprintf(file
, "%sliteral %lu\n", prefix
, two
->size
);
1781 data_size
= deflate_size
;
1784 /* emit data encoded in base85 */
1787 int bytes
= (52 < data_size
) ? 52 : data_size
;
1791 line
[0] = bytes
+ 'A' - 1;
1793 line
[0] = bytes
- 26 + 'a' - 1;
1794 encode_85(line
+ 1, cp
, bytes
);
1795 cp
= (char *) cp
+ bytes
;
1796 fprintf(file
, "%s", prefix
);
1800 fprintf(file
, "%s\n", prefix
);
1804 static void emit_binary_diff(FILE *file
, mmfile_t
*one
, mmfile_t
*two
, char *prefix
)
1806 fprintf(file
, "%sGIT binary patch\n", prefix
);
1807 emit_binary_diff_body(file
, one
, two
, prefix
);
1808 emit_binary_diff_body(file
, two
, one
, prefix
);
1811 static void diff_filespec_load_driver(struct diff_filespec
*one
)
1813 /* Use already-loaded driver */
1817 if (S_ISREG(one
->mode
))
1818 one
->driver
= userdiff_find_by_path(one
->path
);
1820 /* Fallback to default settings */
1822 one
->driver
= userdiff_find_by_name("default");
1825 int diff_filespec_is_binary(struct diff_filespec
*one
)
1827 if (one
->is_binary
== -1) {
1828 diff_filespec_load_driver(one
);
1829 if (one
->driver
->binary
!= -1)
1830 one
->is_binary
= one
->driver
->binary
;
1832 if (!one
->data
&& DIFF_FILE_VALID(one
))
1833 diff_populate_filespec(one
, 0);
1835 one
->is_binary
= buffer_is_binary(one
->data
,
1837 if (one
->is_binary
== -1)
1841 return one
->is_binary
;
1844 static const struct userdiff_funcname
*diff_funcname_pattern(struct diff_filespec
*one
)
1846 diff_filespec_load_driver(one
);
1847 return one
->driver
->funcname
.pattern
? &one
->driver
->funcname
: NULL
;
1850 static const char *userdiff_word_regex(struct diff_filespec
*one
)
1852 diff_filespec_load_driver(one
);
1853 return one
->driver
->word_regex
;
1856 void diff_set_mnemonic_prefix(struct diff_options
*options
, const char *a
, const char *b
)
1858 if (!options
->a_prefix
)
1859 options
->a_prefix
= a
;
1860 if (!options
->b_prefix
)
1861 options
->b_prefix
= b
;
1864 struct userdiff_driver
*get_textconv(struct diff_filespec
*one
)
1866 if (!DIFF_FILE_VALID(one
))
1869 diff_filespec_load_driver(one
);
1870 if (!one
->driver
->textconv
)
1873 if (one
->driver
->textconv_want_cache
&& !one
->driver
->textconv_cache
) {
1874 struct notes_cache
*c
= xmalloc(sizeof(*c
));
1875 struct strbuf name
= STRBUF_INIT
;
1877 strbuf_addf(&name
, "textconv/%s", one
->driver
->name
);
1878 notes_cache_init(c
, name
.buf
, one
->driver
->textconv
);
1879 one
->driver
->textconv_cache
= c
;
1885 static void builtin_diff(const char *name_a
,
1887 struct diff_filespec
*one
,
1888 struct diff_filespec
*two
,
1889 const char *xfrm_msg
,
1890 int must_show_header
,
1891 struct diff_options
*o
,
1892 int complete_rewrite
)
1896 char *a_one
, *b_two
;
1897 const char *set
= diff_get_color_opt(o
, DIFF_METAINFO
);
1898 const char *reset
= diff_get_color_opt(o
, DIFF_RESET
);
1899 const char *a_prefix
, *b_prefix
;
1900 struct userdiff_driver
*textconv_one
= NULL
;
1901 struct userdiff_driver
*textconv_two
= NULL
;
1902 struct strbuf header
= STRBUF_INIT
;
1903 struct strbuf
*msgbuf
;
1904 char *line_prefix
= "";
1906 if (o
->output_prefix
) {
1907 msgbuf
= o
->output_prefix(o
, o
->output_prefix_data
);
1908 line_prefix
= msgbuf
->buf
;
1911 if (DIFF_OPT_TST(o
, SUBMODULE_LOG
) &&
1912 (!one
->mode
|| S_ISGITLINK(one
->mode
)) &&
1913 (!two
->mode
|| S_ISGITLINK(two
->mode
))) {
1914 const char *del
= diff_get_color_opt(o
, DIFF_FILE_OLD
);
1915 const char *add
= diff_get_color_opt(o
, DIFF_FILE_NEW
);
1916 show_submodule_summary(o
->file
, one
? one
->path
: two
->path
,
1917 one
->sha1
, two
->sha1
, two
->dirty_submodule
,
1922 if (DIFF_OPT_TST(o
, ALLOW_TEXTCONV
)) {
1923 textconv_one
= get_textconv(one
);
1924 textconv_two
= get_textconv(two
);
1927 diff_set_mnemonic_prefix(o
, "a/", "b/");
1928 if (DIFF_OPT_TST(o
, REVERSE_DIFF
)) {
1929 a_prefix
= o
->b_prefix
;
1930 b_prefix
= o
->a_prefix
;
1932 a_prefix
= o
->a_prefix
;
1933 b_prefix
= o
->b_prefix
;
1936 /* Never use a non-valid filename anywhere if at all possible */
1937 name_a
= DIFF_FILE_VALID(one
) ? name_a
: name_b
;
1938 name_b
= DIFF_FILE_VALID(two
) ? name_b
: name_a
;
1940 a_one
= quote_two(a_prefix
, name_a
+ (*name_a
== '/'));
1941 b_two
= quote_two(b_prefix
, name_b
+ (*name_b
== '/'));
1942 lbl
[0] = DIFF_FILE_VALID(one
) ? a_one
: "/dev/null";
1943 lbl
[1] = DIFF_FILE_VALID(two
) ? b_two
: "/dev/null";
1944 strbuf_addf(&header
, "%s%sdiff --git %s %s%s\n", line_prefix
, set
, a_one
, b_two
, reset
);
1945 if (lbl
[0][0] == '/') {
1947 strbuf_addf(&header
, "%s%snew file mode %06o%s\n", line_prefix
, set
, two
->mode
, reset
);
1949 strbuf_addstr(&header
, xfrm_msg
);
1950 must_show_header
= 1;
1952 else if (lbl
[1][0] == '/') {
1953 strbuf_addf(&header
, "%s%sdeleted file mode %06o%s\n", line_prefix
, set
, one
->mode
, reset
);
1955 strbuf_addstr(&header
, xfrm_msg
);
1956 must_show_header
= 1;
1959 if (one
->mode
!= two
->mode
) {
1960 strbuf_addf(&header
, "%s%sold mode %06o%s\n", line_prefix
, set
, one
->mode
, reset
);
1961 strbuf_addf(&header
, "%s%snew mode %06o%s\n", line_prefix
, set
, two
->mode
, reset
);
1962 must_show_header
= 1;
1965 strbuf_addstr(&header
, xfrm_msg
);
1968 * we do not run diff between different kind
1971 if ((one
->mode
^ two
->mode
) & S_IFMT
)
1972 goto free_ab_and_return
;
1973 if (complete_rewrite
&&
1974 (textconv_one
|| !diff_filespec_is_binary(one
)) &&
1975 (textconv_two
|| !diff_filespec_is_binary(two
))) {
1976 fprintf(o
->file
, "%s", header
.buf
);
1977 strbuf_reset(&header
);
1978 emit_rewrite_diff(name_a
, name_b
, one
, two
,
1979 textconv_one
, textconv_two
, o
);
1980 o
->found_changes
= 1;
1981 goto free_ab_and_return
;
1985 if (!DIFF_OPT_TST(o
, TEXT
) &&
1986 ( (!textconv_one
&& diff_filespec_is_binary(one
)) ||
1987 (!textconv_two
&& diff_filespec_is_binary(two
)) )) {
1988 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
1989 die("unable to read files to diff");
1990 /* Quite common confusing case */
1991 if (mf1
.size
== mf2
.size
&&
1992 !memcmp(mf1
.ptr
, mf2
.ptr
, mf1
.size
)) {
1993 if (must_show_header
)
1994 fprintf(o
->file
, "%s", header
.buf
);
1995 goto free_ab_and_return
;
1997 fprintf(o
->file
, "%s", header
.buf
);
1998 strbuf_reset(&header
);
1999 if (DIFF_OPT_TST(o
, BINARY
))
2000 emit_binary_diff(o
->file
, &mf1
, &mf2
, line_prefix
);
2002 fprintf(o
->file
, "%sBinary files %s and %s differ\n",
2003 line_prefix
, lbl
[0], lbl
[1]);
2004 o
->found_changes
= 1;
2007 /* Crazy xdl interfaces.. */
2008 const char *diffopts
= getenv("GIT_DIFF_OPTS");
2011 struct emit_callback ecbdata
;
2012 const struct userdiff_funcname
*pe
;
2014 if (!DIFF_XDL_TST(o
, WHITESPACE_FLAGS
) || must_show_header
) {
2015 fprintf(o
->file
, "%s", header
.buf
);
2016 strbuf_reset(&header
);
2019 mf1
.size
= fill_textconv(textconv_one
, one
, &mf1
.ptr
);
2020 mf2
.size
= fill_textconv(textconv_two
, two
, &mf2
.ptr
);
2022 pe
= diff_funcname_pattern(one
);
2024 pe
= diff_funcname_pattern(two
);
2026 memset(&xpp
, 0, sizeof(xpp
));
2027 memset(&xecfg
, 0, sizeof(xecfg
));
2028 memset(&ecbdata
, 0, sizeof(ecbdata
));
2029 ecbdata
.label_path
= lbl
;
2030 ecbdata
.color_diff
= DIFF_OPT_TST(o
, COLOR_DIFF
);
2031 ecbdata
.found_changesp
= &o
->found_changes
;
2032 ecbdata
.ws_rule
= whitespace_rule(name_b
? name_b
: name_a
);
2033 if (ecbdata
.ws_rule
& WS_BLANK_AT_EOF
)
2034 check_blank_at_eof(&mf1
, &mf2
, &ecbdata
);
2036 ecbdata
.header
= header
.len
? &header
: NULL
;
2037 xpp
.flags
= o
->xdl_opts
;
2038 xecfg
.ctxlen
= o
->context
;
2039 xecfg
.interhunkctxlen
= o
->interhunkcontext
;
2040 xecfg
.flags
= XDL_EMIT_FUNCNAMES
;
2042 xdiff_set_find_func(&xecfg
, pe
->pattern
, pe
->cflags
);
2045 else if (!prefixcmp(diffopts
, "--unified="))
2046 xecfg
.ctxlen
= strtoul(diffopts
+ 10, NULL
, 10);
2047 else if (!prefixcmp(diffopts
, "-u"))
2048 xecfg
.ctxlen
= strtoul(diffopts
+ 2, NULL
, 10);
2052 ecbdata
.diff_words
=
2053 xcalloc(1, sizeof(struct diff_words_data
));
2054 ecbdata
.diff_words
->type
= o
->word_diff
;
2055 ecbdata
.diff_words
->opt
= o
;
2057 o
->word_regex
= userdiff_word_regex(one
);
2059 o
->word_regex
= userdiff_word_regex(two
);
2061 o
->word_regex
= diff_word_regex_cfg
;
2062 if (o
->word_regex
) {
2063 ecbdata
.diff_words
->word_regex
= (regex_t
*)
2064 xmalloc(sizeof(regex_t
));
2065 if (regcomp(ecbdata
.diff_words
->word_regex
,
2067 REG_EXTENDED
| REG_NEWLINE
))
2068 die ("Invalid regular expression: %s",
2071 for (i
= 0; i
< ARRAY_SIZE(diff_words_styles
); i
++) {
2072 if (o
->word_diff
== diff_words_styles
[i
].type
) {
2073 ecbdata
.diff_words
->style
=
2074 &diff_words_styles
[i
];
2078 if (DIFF_OPT_TST(o
, COLOR_DIFF
)) {
2079 struct diff_words_style
*st
= ecbdata
.diff_words
->style
;
2080 st
->old
.color
= diff_get_color_opt(o
, DIFF_FILE_OLD
);
2081 st
->new.color
= diff_get_color_opt(o
, DIFF_FILE_NEW
);
2082 st
->ctx
.color
= diff_get_color_opt(o
, DIFF_PLAIN
);
2085 xdi_diff_outf(&mf1
, &mf2
, fn_out_consume
, &ecbdata
,
2088 free_diff_words_data(&ecbdata
);
2093 xdiff_clear_find_func(&xecfg
);
2097 strbuf_release(&header
);
2098 diff_free_filespec_data(one
);
2099 diff_free_filespec_data(two
);
2105 static void builtin_diffstat(const char *name_a
, const char *name_b
,
2106 struct diff_filespec
*one
,
2107 struct diff_filespec
*two
,
2108 struct diffstat_t
*diffstat
,
2109 struct diff_options
*o
,
2110 int complete_rewrite
)
2113 struct diffstat_file
*data
;
2115 data
= diffstat_add(diffstat
, name_a
, name_b
);
2118 data
->is_unmerged
= 1;
2122 if (diff_filespec_is_binary(one
) || diff_filespec_is_binary(two
)) {
2123 data
->is_binary
= 1;
2124 data
->added
= diff_filespec_size(two
);
2125 data
->deleted
= diff_filespec_size(one
);
2128 else if (complete_rewrite
) {
2129 diff_populate_filespec(one
, 0);
2130 diff_populate_filespec(two
, 0);
2131 data
->deleted
= count_lines(one
->data
, one
->size
);
2132 data
->added
= count_lines(two
->data
, two
->size
);
2136 /* Crazy xdl interfaces.. */
2140 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
2141 die("unable to read files to diff");
2143 memset(&xpp
, 0, sizeof(xpp
));
2144 memset(&xecfg
, 0, sizeof(xecfg
));
2145 xpp
.flags
= o
->xdl_opts
;
2146 xdi_diff_outf(&mf1
, &mf2
, diffstat_consume
, diffstat
,
2150 diff_free_filespec_data(one
);
2151 diff_free_filespec_data(two
);
2154 static void builtin_checkdiff(const char *name_a
, const char *name_b
,
2155 const char *attr_path
,
2156 struct diff_filespec
*one
,
2157 struct diff_filespec
*two
,
2158 struct diff_options
*o
)
2161 struct checkdiff_t data
;
2166 memset(&data
, 0, sizeof(data
));
2167 data
.filename
= name_b
? name_b
: name_a
;
2170 data
.ws_rule
= whitespace_rule(attr_path
);
2171 data
.conflict_marker_size
= ll_merge_marker_size(attr_path
);
2173 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
2174 die("unable to read files to diff");
2177 * All the other codepaths check both sides, but not checking
2178 * the "old" side here is deliberate. We are checking the newly
2179 * introduced changes, and as long as the "new" side is text, we
2180 * can and should check what it introduces.
2182 if (diff_filespec_is_binary(two
))
2183 goto free_and_return
;
2185 /* Crazy xdl interfaces.. */
2189 memset(&xpp
, 0, sizeof(xpp
));
2190 memset(&xecfg
, 0, sizeof(xecfg
));
2191 xecfg
.ctxlen
= 1; /* at least one context line */
2193 xdi_diff_outf(&mf1
, &mf2
, checkdiff_consume
, &data
,
2196 if (data
.ws_rule
& WS_BLANK_AT_EOF
) {
2197 struct emit_callback ecbdata
;
2200 ecbdata
.ws_rule
= data
.ws_rule
;
2201 check_blank_at_eof(&mf1
, &mf2
, &ecbdata
);
2202 blank_at_eof
= ecbdata
.blank_at_eof_in_postimage
;
2207 err
= whitespace_error_string(WS_BLANK_AT_EOF
);
2208 fprintf(o
->file
, "%s:%d: %s.\n",
2209 data
.filename
, blank_at_eof
, err
);
2210 data
.status
= 1; /* report errors */
2215 diff_free_filespec_data(one
);
2216 diff_free_filespec_data(two
);
2218 DIFF_OPT_SET(o
, CHECK_FAILED
);
2221 struct diff_filespec
*alloc_filespec(const char *path
)
2223 int namelen
= strlen(path
);
2224 struct diff_filespec
*spec
= xmalloc(sizeof(*spec
) + namelen
+ 1);
2226 memset(spec
, 0, sizeof(*spec
));
2227 spec
->path
= (char *)(spec
+ 1);
2228 memcpy(spec
->path
, path
, namelen
+1);
2230 spec
->is_binary
= -1;
2234 void free_filespec(struct diff_filespec
*spec
)
2236 if (!--spec
->count
) {
2237 diff_free_filespec_data(spec
);
2242 void fill_filespec(struct diff_filespec
*spec
, const unsigned char *sha1
,
2243 unsigned short mode
)
2246 spec
->mode
= canon_mode(mode
);
2247 hashcpy(spec
->sha1
, sha1
);
2248 spec
->sha1_valid
= !is_null_sha1(sha1
);
2253 * Given a name and sha1 pair, if the index tells us the file in
2254 * the work tree has that object contents, return true, so that
2255 * prepare_temp_file() does not have to inflate and extract.
2257 static int reuse_worktree_file(const char *name
, const unsigned char *sha1
, int want_file
)
2259 struct cache_entry
*ce
;
2264 * We do not read the cache ourselves here, because the
2265 * benchmark with my previous version that always reads cache
2266 * shows that it makes things worse for diff-tree comparing
2267 * two linux-2.6 kernel trees in an already checked out work
2268 * tree. This is because most diff-tree comparisons deal with
2269 * only a small number of files, while reading the cache is
2270 * expensive for a large project, and its cost outweighs the
2271 * savings we get by not inflating the object to a temporary
2272 * file. Practically, this code only helps when we are used
2273 * by diff-cache --cached, which does read the cache before
2279 /* We want to avoid the working directory if our caller
2280 * doesn't need the data in a normal file, this system
2281 * is rather slow with its stat/open/mmap/close syscalls,
2282 * and the object is contained in a pack file. The pack
2283 * is probably already open and will be faster to obtain
2284 * the data through than the working directory. Loose
2285 * objects however would tend to be slower as they need
2286 * to be individually opened and inflated.
2288 if (!FAST_WORKING_DIRECTORY
&& !want_file
&& has_sha1_pack(sha1
))
2292 pos
= cache_name_pos(name
, len
);
2295 ce
= active_cache
[pos
];
2298 * This is not the sha1 we are looking for, or
2299 * unreusable because it is not a regular file.
2301 if (hashcmp(sha1
, ce
->sha1
) || !S_ISREG(ce
->ce_mode
))
2305 * If ce is marked as "assume unchanged", there is no
2306 * guarantee that work tree matches what we are looking for.
2308 if ((ce
->ce_flags
& CE_VALID
) || ce_skip_worktree(ce
))
2312 * If ce matches the file in the work tree, we can reuse it.
2314 if (ce_uptodate(ce
) ||
2315 (!lstat(name
, &st
) && !ce_match_stat(ce
, &st
, 0)))
2321 static int populate_from_stdin(struct diff_filespec
*s
)
2323 struct strbuf buf
= STRBUF_INIT
;
2326 if (strbuf_read(&buf
, 0, 0) < 0)
2327 return error("error while reading from stdin %s",
2330 s
->should_munmap
= 0;
2331 s
->data
= strbuf_detach(&buf
, &size
);
2337 static int diff_populate_gitlink(struct diff_filespec
*s
, int size_only
)
2340 char *data
= xmalloc(100), *dirty
= "";
2342 /* Are we looking at the work tree? */
2343 if (s
->dirty_submodule
)
2346 len
= snprintf(data
, 100,
2347 "Subproject commit %s%s\n", sha1_to_hex(s
->sha1
), dirty
);
2359 * While doing rename detection and pickaxe operation, we may need to
2360 * grab the data for the blob (or file) for our own in-core comparison.
2361 * diff_filespec has data and size fields for this purpose.
2363 int diff_populate_filespec(struct diff_filespec
*s
, int size_only
)
2366 if (!DIFF_FILE_VALID(s
))
2367 die("internal error: asking to populate invalid file.");
2368 if (S_ISDIR(s
->mode
))
2374 if (size_only
&& 0 < s
->size
)
2377 if (S_ISGITLINK(s
->mode
))
2378 return diff_populate_gitlink(s
, size_only
);
2380 if (!s
->sha1_valid
||
2381 reuse_worktree_file(s
->path
, s
->sha1
, 0)) {
2382 struct strbuf buf
= STRBUF_INIT
;
2386 if (!strcmp(s
->path
, "-"))
2387 return populate_from_stdin(s
);
2389 if (lstat(s
->path
, &st
) < 0) {
2390 if (errno
== ENOENT
) {
2394 s
->data
= (char *)"";
2399 s
->size
= xsize_t(st
.st_size
);
2402 if (S_ISLNK(st
.st_mode
)) {
2403 struct strbuf sb
= STRBUF_INIT
;
2405 if (strbuf_readlink(&sb
, s
->path
, s
->size
))
2408 s
->data
= strbuf_detach(&sb
, NULL
);
2414 fd
= open(s
->path
, O_RDONLY
);
2417 s
->data
= xmmap(NULL
, s
->size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
2419 s
->should_munmap
= 1;
2422 * Convert from working tree format to canonical git format
2424 if (convert_to_git(s
->path
, s
->data
, s
->size
, &buf
, safe_crlf
)) {
2426 munmap(s
->data
, s
->size
);
2427 s
->should_munmap
= 0;
2428 s
->data
= strbuf_detach(&buf
, &size
);
2434 enum object_type type
;
2436 type
= sha1_object_info(s
->sha1
, &s
->size
);
2438 die("unable to read %s", sha1_to_hex(s
->sha1
));
2440 s
->data
= read_sha1_file(s
->sha1
, &type
, &s
->size
);
2442 die("unable to read %s", sha1_to_hex(s
->sha1
));
2449 void diff_free_filespec_blob(struct diff_filespec
*s
)
2453 else if (s
->should_munmap
)
2454 munmap(s
->data
, s
->size
);
2456 if (s
->should_free
|| s
->should_munmap
) {
2457 s
->should_free
= s
->should_munmap
= 0;
2462 void diff_free_filespec_data(struct diff_filespec
*s
)
2464 diff_free_filespec_blob(s
);
2469 static void prep_temp_blob(const char *path
, struct diff_tempfile
*temp
,
2472 const unsigned char *sha1
,
2476 struct strbuf buf
= STRBUF_INIT
;
2477 struct strbuf
template = STRBUF_INIT
;
2478 char *path_dup
= xstrdup(path
);
2479 const char *base
= basename(path_dup
);
2481 /* Generate "XXXXXX_basename.ext" */
2482 strbuf_addstr(&template, "XXXXXX_");
2483 strbuf_addstr(&template, base
);
2485 fd
= git_mkstemps(temp
->tmp_path
, PATH_MAX
, template.buf
,
2488 die_errno("unable to create temp-file");
2489 if (convert_to_working_tree(path
,
2490 (const char *)blob
, (size_t)size
, &buf
)) {
2494 if (write_in_full(fd
, blob
, size
) != size
)
2495 die_errno("unable to write temp-file");
2497 temp
->name
= temp
->tmp_path
;
2498 strcpy(temp
->hex
, sha1_to_hex(sha1
));
2500 sprintf(temp
->mode
, "%06o", mode
);
2501 strbuf_release(&buf
);
2502 strbuf_release(&template);
2506 static struct diff_tempfile
*prepare_temp_file(const char *name
,
2507 struct diff_filespec
*one
)
2509 struct diff_tempfile
*temp
= claim_diff_tempfile();
2511 if (!DIFF_FILE_VALID(one
)) {
2513 /* A '-' entry produces this for file-2, and
2514 * a '+' entry produces this for file-1.
2516 temp
->name
= "/dev/null";
2517 strcpy(temp
->hex
, ".");
2518 strcpy(temp
->mode
, ".");
2522 if (!remove_tempfile_installed
) {
2523 atexit(remove_tempfile
);
2524 sigchain_push_common(remove_tempfile_on_signal
);
2525 remove_tempfile_installed
= 1;
2528 if (!one
->sha1_valid
||
2529 reuse_worktree_file(name
, one
->sha1
, 1)) {
2531 if (lstat(name
, &st
) < 0) {
2532 if (errno
== ENOENT
)
2533 goto not_a_valid_file
;
2534 die_errno("stat(%s)", name
);
2536 if (S_ISLNK(st
.st_mode
)) {
2537 struct strbuf sb
= STRBUF_INIT
;
2538 if (strbuf_readlink(&sb
, name
, st
.st_size
) < 0)
2539 die_errno("readlink(%s)", name
);
2540 prep_temp_blob(name
, temp
, sb
.buf
, sb
.len
,
2542 one
->sha1
: null_sha1
),
2544 one
->mode
: S_IFLNK
));
2545 strbuf_release(&sb
);
2548 /* we can borrow from the file in the work tree */
2550 if (!one
->sha1_valid
)
2551 strcpy(temp
->hex
, sha1_to_hex(null_sha1
));
2553 strcpy(temp
->hex
, sha1_to_hex(one
->sha1
));
2554 /* Even though we may sometimes borrow the
2555 * contents from the work tree, we always want
2556 * one->mode. mode is trustworthy even when
2557 * !(one->sha1_valid), as long as
2558 * DIFF_FILE_VALID(one).
2560 sprintf(temp
->mode
, "%06o", one
->mode
);
2565 if (diff_populate_filespec(one
, 0))
2566 die("cannot read data blob for %s", one
->path
);
2567 prep_temp_blob(name
, temp
, one
->data
, one
->size
,
2568 one
->sha1
, one
->mode
);
2573 /* An external diff command takes:
2575 * diff-cmd name infile1 infile1-sha1 infile1-mode \
2576 * infile2 infile2-sha1 infile2-mode [ rename-to ]
2579 static void run_external_diff(const char *pgm
,
2582 struct diff_filespec
*one
,
2583 struct diff_filespec
*two
,
2584 const char *xfrm_msg
,
2585 int complete_rewrite
)
2587 const char *spawn_arg
[10];
2589 const char **arg
= &spawn_arg
[0];
2592 struct diff_tempfile
*temp_one
, *temp_two
;
2593 const char *othername
= (other
? other
: name
);
2594 temp_one
= prepare_temp_file(name
, one
);
2595 temp_two
= prepare_temp_file(othername
, two
);
2598 *arg
++ = temp_one
->name
;
2599 *arg
++ = temp_one
->hex
;
2600 *arg
++ = temp_one
->mode
;
2601 *arg
++ = temp_two
->name
;
2602 *arg
++ = temp_two
->hex
;
2603 *arg
++ = temp_two
->mode
;
2614 retval
= run_command_v_opt(spawn_arg
, RUN_USING_SHELL
);
2617 fprintf(stderr
, "external diff died, stopping at %s.\n", name
);
2622 static int similarity_index(struct diff_filepair
*p
)
2624 return p
->score
* 100 / MAX_SCORE
;
2627 static void fill_metainfo(struct strbuf
*msg
,
2630 struct diff_filespec
*one
,
2631 struct diff_filespec
*two
,
2632 struct diff_options
*o
,
2633 struct diff_filepair
*p
,
2634 int *must_show_header
,
2637 const char *set
= diff_get_color(use_color
, DIFF_METAINFO
);
2638 const char *reset
= diff_get_color(use_color
, DIFF_RESET
);
2639 struct strbuf
*msgbuf
;
2640 char *line_prefix
= "";
2642 *must_show_header
= 1;
2643 if (o
->output_prefix
) {
2644 msgbuf
= o
->output_prefix(o
, o
->output_prefix_data
);
2645 line_prefix
= msgbuf
->buf
;
2647 strbuf_init(msg
, PATH_MAX
* 2 + 300);
2648 switch (p
->status
) {
2649 case DIFF_STATUS_COPIED
:
2650 strbuf_addf(msg
, "%s%ssimilarity index %d%%",
2651 line_prefix
, set
, similarity_index(p
));
2652 strbuf_addf(msg
, "%s\n%s%scopy from ",
2653 reset
, line_prefix
, set
);
2654 quote_c_style(name
, msg
, NULL
, 0);
2655 strbuf_addf(msg
, "%s\n%s%scopy to ", reset
, line_prefix
, set
);
2656 quote_c_style(other
, msg
, NULL
, 0);
2657 strbuf_addf(msg
, "%s\n", reset
);
2659 case DIFF_STATUS_RENAMED
:
2660 strbuf_addf(msg
, "%s%ssimilarity index %d%%",
2661 line_prefix
, set
, similarity_index(p
));
2662 strbuf_addf(msg
, "%s\n%s%srename from ",
2663 reset
, line_prefix
, set
);
2664 quote_c_style(name
, msg
, NULL
, 0);
2665 strbuf_addf(msg
, "%s\n%s%srename to ",
2666 reset
, line_prefix
, set
);
2667 quote_c_style(other
, msg
, NULL
, 0);
2668 strbuf_addf(msg
, "%s\n", reset
);
2670 case DIFF_STATUS_MODIFIED
:
2672 strbuf_addf(msg
, "%s%sdissimilarity index %d%%%s\n",
2674 set
, similarity_index(p
), reset
);
2679 *must_show_header
= 0;
2681 if (one
&& two
&& hashcmp(one
->sha1
, two
->sha1
)) {
2682 int abbrev
= DIFF_OPT_TST(o
, FULL_INDEX
) ? 40 : DEFAULT_ABBREV
;
2684 if (DIFF_OPT_TST(o
, BINARY
)) {
2686 if ((!fill_mmfile(&mf
, one
) && diff_filespec_is_binary(one
)) ||
2687 (!fill_mmfile(&mf
, two
) && diff_filespec_is_binary(two
)))
2690 strbuf_addf(msg
, "%s%sindex %s..", line_prefix
, set
,
2691 find_unique_abbrev(one
->sha1
, abbrev
));
2692 strbuf_addstr(msg
, find_unique_abbrev(two
->sha1
, abbrev
));
2693 if (one
->mode
== two
->mode
)
2694 strbuf_addf(msg
, " %06o", one
->mode
);
2695 strbuf_addf(msg
, "%s\n", reset
);
2699 static void run_diff_cmd(const char *pgm
,
2702 const char *attr_path
,
2703 struct diff_filespec
*one
,
2704 struct diff_filespec
*two
,
2706 struct diff_options
*o
,
2707 struct diff_filepair
*p
)
2709 const char *xfrm_msg
= NULL
;
2710 int complete_rewrite
= (p
->status
== DIFF_STATUS_MODIFIED
) && p
->score
;
2711 int must_show_header
= 0;
2713 if (!DIFF_OPT_TST(o
, ALLOW_EXTERNAL
))
2716 struct userdiff_driver
*drv
= userdiff_find_by_path(attr_path
);
2717 if (drv
&& drv
->external
)
2718 pgm
= drv
->external
;
2723 * don't use colors when the header is intended for an
2724 * external diff driver
2726 fill_metainfo(msg
, name
, other
, one
, two
, o
, p
,
2728 DIFF_OPT_TST(o
, COLOR_DIFF
) && !pgm
);
2729 xfrm_msg
= msg
->len
? msg
->buf
: NULL
;
2733 run_external_diff(pgm
, name
, other
, one
, two
, xfrm_msg
,
2738 builtin_diff(name
, other
? other
: name
,
2739 one
, two
, xfrm_msg
, must_show_header
,
2740 o
, complete_rewrite
);
2742 fprintf(o
->file
, "* Unmerged path %s\n", name
);
2745 static void diff_fill_sha1_info(struct diff_filespec
*one
)
2747 if (DIFF_FILE_VALID(one
)) {
2748 if (!one
->sha1_valid
) {
2750 if (!strcmp(one
->path
, "-")) {
2751 hashcpy(one
->sha1
, null_sha1
);
2754 if (lstat(one
->path
, &st
) < 0)
2755 die_errno("stat '%s'", one
->path
);
2756 if (index_path(one
->sha1
, one
->path
, &st
, 0))
2757 die("cannot hash %s", one
->path
);
2764 static void strip_prefix(int prefix_length
, const char **namep
, const char **otherp
)
2766 /* Strip the prefix but do not molest /dev/null and absolute paths */
2767 if (*namep
&& **namep
!= '/') {
2768 *namep
+= prefix_length
;
2772 if (*otherp
&& **otherp
!= '/') {
2773 *otherp
+= prefix_length
;
2774 if (**otherp
== '/')
2779 static void run_diff(struct diff_filepair
*p
, struct diff_options
*o
)
2781 const char *pgm
= external_diff();
2783 struct diff_filespec
*one
= p
->one
;
2784 struct diff_filespec
*two
= p
->two
;
2787 const char *attr_path
;
2789 name
= p
->one
->path
;
2790 other
= (strcmp(name
, p
->two
->path
) ? p
->two
->path
: NULL
);
2792 if (o
->prefix_length
)
2793 strip_prefix(o
->prefix_length
, &name
, &other
);
2795 if (DIFF_PAIR_UNMERGED(p
)) {
2796 run_diff_cmd(pgm
, name
, NULL
, attr_path
,
2797 NULL
, NULL
, NULL
, o
, p
);
2801 diff_fill_sha1_info(one
);
2802 diff_fill_sha1_info(two
);
2805 DIFF_FILE_VALID(one
) && DIFF_FILE_VALID(two
) &&
2806 (S_IFMT
& one
->mode
) != (S_IFMT
& two
->mode
)) {
2808 * a filepair that changes between file and symlink
2809 * needs to be split into deletion and creation.
2811 struct diff_filespec
*null
= alloc_filespec(two
->path
);
2812 run_diff_cmd(NULL
, name
, other
, attr_path
,
2813 one
, null
, &msg
, o
, p
);
2815 strbuf_release(&msg
);
2817 null
= alloc_filespec(one
->path
);
2818 run_diff_cmd(NULL
, name
, other
, attr_path
,
2819 null
, two
, &msg
, o
, p
);
2823 run_diff_cmd(pgm
, name
, other
, attr_path
,
2824 one
, two
, &msg
, o
, p
);
2826 strbuf_release(&msg
);
2829 static void run_diffstat(struct diff_filepair
*p
, struct diff_options
*o
,
2830 struct diffstat_t
*diffstat
)
2834 int complete_rewrite
= 0;
2836 if (DIFF_PAIR_UNMERGED(p
)) {
2838 builtin_diffstat(p
->one
->path
, NULL
, NULL
, NULL
, diffstat
, o
, 0);
2842 name
= p
->one
->path
;
2843 other
= (strcmp(name
, p
->two
->path
) ? p
->two
->path
: NULL
);
2845 if (o
->prefix_length
)
2846 strip_prefix(o
->prefix_length
, &name
, &other
);
2848 diff_fill_sha1_info(p
->one
);
2849 diff_fill_sha1_info(p
->two
);
2851 if (p
->status
== DIFF_STATUS_MODIFIED
&& p
->score
)
2852 complete_rewrite
= 1;
2853 builtin_diffstat(name
, other
, p
->one
, p
->two
, diffstat
, o
, complete_rewrite
);
2856 static void run_checkdiff(struct diff_filepair
*p
, struct diff_options
*o
)
2860 const char *attr_path
;
2862 if (DIFF_PAIR_UNMERGED(p
)) {
2867 name
= p
->one
->path
;
2868 other
= (strcmp(name
, p
->two
->path
) ? p
->two
->path
: NULL
);
2869 attr_path
= other
? other
: name
;
2871 if (o
->prefix_length
)
2872 strip_prefix(o
->prefix_length
, &name
, &other
);
2874 diff_fill_sha1_info(p
->one
);
2875 diff_fill_sha1_info(p
->two
);
2877 builtin_checkdiff(name
, other
, attr_path
, p
->one
, p
->two
, o
);
2880 void diff_setup(struct diff_options
*options
)
2882 memcpy(options
, &default_diff_options
, sizeof(*options
));
2884 options
->file
= stdout
;
2886 options
->line_termination
= '\n';
2887 options
->break_opt
= -1;
2888 options
->rename_limit
= -1;
2889 options
->dirstat_percent
= 3;
2890 options
->context
= 3;
2892 options
->change
= diff_change
;
2893 options
->add_remove
= diff_addremove
;
2894 if (diff_use_color_default
> 0)
2895 DIFF_OPT_SET(options
, COLOR_DIFF
);
2896 options
->detect_rename
= diff_detect_rename_default
;
2898 if (diff_no_prefix
) {
2899 options
->a_prefix
= options
->b_prefix
= "";
2900 } else if (!diff_mnemonic_prefix
) {
2901 options
->a_prefix
= "a/";
2902 options
->b_prefix
= "b/";
2906 int diff_setup_done(struct diff_options
*options
)
2910 if (options
->output_format
& DIFF_FORMAT_NAME
)
2912 if (options
->output_format
& DIFF_FORMAT_NAME_STATUS
)
2914 if (options
->output_format
& DIFF_FORMAT_CHECKDIFF
)
2916 if (options
->output_format
& DIFF_FORMAT_NO_OUTPUT
)
2919 die("--name-only, --name-status, --check and -s are mutually exclusive");
2922 * Most of the time we can say "there are changes"
2923 * only by checking if there are changed paths, but
2924 * --ignore-whitespace* options force us to look
2928 if (DIFF_XDL_TST(options
, IGNORE_WHITESPACE
) ||
2929 DIFF_XDL_TST(options
, IGNORE_WHITESPACE_CHANGE
) ||
2930 DIFF_XDL_TST(options
, IGNORE_WHITESPACE_AT_EOL
))
2931 DIFF_OPT_SET(options
, DIFF_FROM_CONTENTS
);
2933 DIFF_OPT_CLR(options
, DIFF_FROM_CONTENTS
);
2935 if (DIFF_OPT_TST(options
, FIND_COPIES_HARDER
))
2936 options
->detect_rename
= DIFF_DETECT_COPY
;
2938 if (!DIFF_OPT_TST(options
, RELATIVE_NAME
))
2939 options
->prefix
= NULL
;
2940 if (options
->prefix
)
2941 options
->prefix_length
= strlen(options
->prefix
);
2943 options
->prefix_length
= 0;
2945 if (options
->output_format
& (DIFF_FORMAT_NAME
|
2946 DIFF_FORMAT_NAME_STATUS
|
2947 DIFF_FORMAT_CHECKDIFF
|
2948 DIFF_FORMAT_NO_OUTPUT
))
2949 options
->output_format
&= ~(DIFF_FORMAT_RAW
|
2950 DIFF_FORMAT_NUMSTAT
|
2951 DIFF_FORMAT_DIFFSTAT
|
2952 DIFF_FORMAT_SHORTSTAT
|
2953 DIFF_FORMAT_DIRSTAT
|
2954 DIFF_FORMAT_SUMMARY
|
2958 * These cases always need recursive; we do not drop caller-supplied
2959 * recursive bits for other formats here.
2961 if (options
->output_format
& (DIFF_FORMAT_PATCH
|
2962 DIFF_FORMAT_NUMSTAT
|
2963 DIFF_FORMAT_DIFFSTAT
|
2964 DIFF_FORMAT_SHORTSTAT
|
2965 DIFF_FORMAT_DIRSTAT
|
2966 DIFF_FORMAT_SUMMARY
|
2967 DIFF_FORMAT_CHECKDIFF
))
2968 DIFF_OPT_SET(options
, RECURSIVE
);
2970 * Also pickaxe would not work very well if you do not say recursive
2972 if (options
->pickaxe
)
2973 DIFF_OPT_SET(options
, RECURSIVE
);
2975 * When patches are generated, submodules diffed against the work tree
2976 * must be checked for dirtiness too so it can be shown in the output
2978 if (options
->output_format
& DIFF_FORMAT_PATCH
)
2979 DIFF_OPT_SET(options
, DIRTY_SUBMODULES
);
2981 if (options
->detect_rename
&& options
->rename_limit
< 0)
2982 options
->rename_limit
= diff_rename_limit_default
;
2983 if (options
->setup
& DIFF_SETUP_USE_CACHE
) {
2985 /* read-cache does not die even when it fails
2986 * so it is safe for us to do this here. Also
2987 * it does not smudge active_cache or active_nr
2988 * when it fails, so we do not have to worry about
2989 * cleaning it up ourselves either.
2993 if (options
->abbrev
<= 0 || 40 < options
->abbrev
)
2994 options
->abbrev
= 40; /* full */
2997 * It does not make sense to show the first hit we happened
2998 * to have found. It does not make sense not to return with
2999 * exit code in such a case either.
3001 if (DIFF_OPT_TST(options
, QUICK
)) {
3002 options
->output_format
= DIFF_FORMAT_NO_OUTPUT
;
3003 DIFF_OPT_SET(options
, EXIT_WITH_STATUS
);
3009 static int opt_arg(const char *arg
, int arg_short
, const char *arg_long
, int *val
)
3019 if (c
== arg_short
) {
3023 if (val
&& isdigit(c
)) {
3025 int n
= strtoul(arg
, &end
, 10);
3036 eq
= strchr(arg
, '=');
3041 if (!len
|| strncmp(arg
, arg_long
, len
))
3046 if (!isdigit(*++eq
))
3048 n
= strtoul(eq
, &end
, 10);
3056 static int diff_scoreopt_parse(const char *opt
);
3058 static inline int short_opt(char opt
, const char **argv
,
3059 const char **optarg
)
3061 const char *arg
= argv
[0];
3062 if (arg
[0] != '-' || arg
[1] != opt
)
3064 if (arg
[2] != '\0') {
3069 die("Option '%c' requires a value", opt
);
3074 int parse_long_opt(const char *opt
, const char **argv
,
3075 const char **optarg
)
3077 const char *arg
= argv
[0];
3078 if (arg
[0] != '-' || arg
[1] != '-')
3080 arg
+= strlen("--");
3081 if (prefixcmp(arg
, opt
))
3084 if (*arg
== '=') { /* sticked form: --option=value */
3090 /* separate form: --option value */
3092 die("Option '--%s' requires a value", opt
);
3097 static int stat_opt(struct diff_options
*options
, const char **av
)
3099 const char *arg
= av
[0];
3101 int width
= options
->stat_width
;
3102 int name_width
= options
->stat_name_width
;
3105 arg
+= strlen("--stat");
3110 if (!prefixcmp(arg
, "-width")) {
3111 arg
+= strlen("-width");
3113 width
= strtoul(arg
+ 1, &end
, 10);
3114 else if (!*arg
&& !av
[1])
3115 die("Option '--stat-width' requires a value");
3117 width
= strtoul(av
[1], &end
, 10);
3120 } else if (!prefixcmp(arg
, "-name-width")) {
3121 arg
+= strlen("-name-width");
3123 name_width
= strtoul(arg
+ 1, &end
, 10);
3124 else if (!*arg
&& !av
[1])
3125 die("Option '--stat-name-width' requires a value");
3127 name_width
= strtoul(av
[1], &end
, 10);
3133 width
= strtoul(arg
+1, &end
, 10);
3135 name_width
= strtoul(end
+1, &end
, 10);
3138 /* Important! This checks all the error cases! */
3141 options
->output_format
|= DIFF_FORMAT_DIFFSTAT
;
3142 options
->stat_name_width
= name_width
;
3143 options
->stat_width
= width
;
3147 int diff_opt_parse(struct diff_options
*options
, const char **av
, int ac
)
3149 const char *arg
= av
[0];
3153 /* Output format options */
3154 if (!strcmp(arg
, "-p") || !strcmp(arg
, "-u") || !strcmp(arg
, "--patch"))
3155 options
->output_format
|= DIFF_FORMAT_PATCH
;
3156 else if (opt_arg(arg
, 'U', "unified", &options
->context
))
3157 options
->output_format
|= DIFF_FORMAT_PATCH
;
3158 else if (!strcmp(arg
, "--raw"))
3159 options
->output_format
|= DIFF_FORMAT_RAW
;
3160 else if (!strcmp(arg
, "--patch-with-raw"))
3161 options
->output_format
|= DIFF_FORMAT_PATCH
| DIFF_FORMAT_RAW
;
3162 else if (!strcmp(arg
, "--numstat"))
3163 options
->output_format
|= DIFF_FORMAT_NUMSTAT
;
3164 else if (!strcmp(arg
, "--shortstat"))
3165 options
->output_format
|= DIFF_FORMAT_SHORTSTAT
;
3166 else if (opt_arg(arg
, 'X', "dirstat", &options
->dirstat_percent
))
3167 options
->output_format
|= DIFF_FORMAT_DIRSTAT
;
3168 else if (!strcmp(arg
, "--cumulative")) {
3169 options
->output_format
|= DIFF_FORMAT_DIRSTAT
;
3170 DIFF_OPT_SET(options
, DIRSTAT_CUMULATIVE
);
3171 } else if (opt_arg(arg
, 0, "dirstat-by-file",
3172 &options
->dirstat_percent
)) {
3173 options
->output_format
|= DIFF_FORMAT_DIRSTAT
;
3174 DIFF_OPT_SET(options
, DIRSTAT_BY_FILE
);
3176 else if (!strcmp(arg
, "--check"))
3177 options
->output_format
|= DIFF_FORMAT_CHECKDIFF
;
3178 else if (!strcmp(arg
, "--summary"))
3179 options
->output_format
|= DIFF_FORMAT_SUMMARY
;
3180 else if (!strcmp(arg
, "--patch-with-stat"))
3181 options
->output_format
|= DIFF_FORMAT_PATCH
| DIFF_FORMAT_DIFFSTAT
;
3182 else if (!strcmp(arg
, "--name-only"))
3183 options
->output_format
|= DIFF_FORMAT_NAME
;
3184 else if (!strcmp(arg
, "--name-status"))
3185 options
->output_format
|= DIFF_FORMAT_NAME_STATUS
;
3186 else if (!strcmp(arg
, "-s"))
3187 options
->output_format
|= DIFF_FORMAT_NO_OUTPUT
;
3188 else if (!prefixcmp(arg
, "--stat"))
3189 /* --stat, --stat-width, or --stat-name-width */
3190 return stat_opt(options
, av
);
3192 /* renames options */
3193 else if (!prefixcmp(arg
, "-B") || !prefixcmp(arg
, "--break-rewrites=") ||
3194 !strcmp(arg
, "--break-rewrites")) {
3195 if ((options
->break_opt
= diff_scoreopt_parse(arg
)) == -1)
3196 return error("invalid argument to -B: %s", arg
+2);
3198 else if (!prefixcmp(arg
, "-M") || !prefixcmp(arg
, "--find-renames=") ||
3199 !strcmp(arg
, "--find-renames")) {
3200 if ((options
->rename_score
= diff_scoreopt_parse(arg
)) == -1)
3201 return error("invalid argument to -M: %s", arg
+2);
3202 options
->detect_rename
= DIFF_DETECT_RENAME
;
3204 else if (!prefixcmp(arg
, "-C") || !prefixcmp(arg
, "--find-copies=") ||
3205 !strcmp(arg
, "--find-copies")) {
3206 if (options
->detect_rename
== DIFF_DETECT_COPY
)
3207 DIFF_OPT_SET(options
, FIND_COPIES_HARDER
);
3208 if ((options
->rename_score
= diff_scoreopt_parse(arg
)) == -1)
3209 return error("invalid argument to -C: %s", arg
+2);
3210 options
->detect_rename
= DIFF_DETECT_COPY
;
3212 else if (!strcmp(arg
, "--no-renames"))
3213 options
->detect_rename
= 0;
3214 else if (!strcmp(arg
, "--relative"))
3215 DIFF_OPT_SET(options
, RELATIVE_NAME
);
3216 else if (!prefixcmp(arg
, "--relative=")) {
3217 DIFF_OPT_SET(options
, RELATIVE_NAME
);
3218 options
->prefix
= arg
+ 11;
3222 else if (!strcmp(arg
, "-w") || !strcmp(arg
, "--ignore-all-space"))
3223 DIFF_XDL_SET(options
, IGNORE_WHITESPACE
);
3224 else if (!strcmp(arg
, "-b") || !strcmp(arg
, "--ignore-space-change"))
3225 DIFF_XDL_SET(options
, IGNORE_WHITESPACE_CHANGE
);
3226 else if (!strcmp(arg
, "--ignore-space-at-eol"))
3227 DIFF_XDL_SET(options
, IGNORE_WHITESPACE_AT_EOL
);
3228 else if (!strcmp(arg
, "--patience"))
3229 DIFF_XDL_SET(options
, PATIENCE_DIFF
);
3232 else if (!strcmp(arg
, "--binary")) {
3233 options
->output_format
|= DIFF_FORMAT_PATCH
;
3234 DIFF_OPT_SET(options
, BINARY
);
3236 else if (!strcmp(arg
, "--full-index"))
3237 DIFF_OPT_SET(options
, FULL_INDEX
);
3238 else if (!strcmp(arg
, "-a") || !strcmp(arg
, "--text"))
3239 DIFF_OPT_SET(options
, TEXT
);
3240 else if (!strcmp(arg
, "-R"))
3241 DIFF_OPT_SET(options
, REVERSE_DIFF
);
3242 else if (!strcmp(arg
, "--find-copies-harder"))
3243 DIFF_OPT_SET(options
, FIND_COPIES_HARDER
);
3244 else if (!strcmp(arg
, "--follow"))
3245 DIFF_OPT_SET(options
, FOLLOW_RENAMES
);
3246 else if (!strcmp(arg
, "--color"))
3247 DIFF_OPT_SET(options
, COLOR_DIFF
);
3248 else if (!prefixcmp(arg
, "--color=")) {
3249 int value
= git_config_colorbool(NULL
, arg
+8, -1);
3251 DIFF_OPT_CLR(options
, COLOR_DIFF
);
3253 DIFF_OPT_SET(options
, COLOR_DIFF
);
3255 return error("option `color' expects \"always\", \"auto\", or \"never\"");
3257 else if (!strcmp(arg
, "--no-color"))
3258 DIFF_OPT_CLR(options
, COLOR_DIFF
);
3259 else if (!strcmp(arg
, "--color-words")) {
3260 DIFF_OPT_SET(options
, COLOR_DIFF
);
3261 options
->word_diff
= DIFF_WORDS_COLOR
;
3263 else if (!prefixcmp(arg
, "--color-words=")) {
3264 DIFF_OPT_SET(options
, COLOR_DIFF
);
3265 options
->word_diff
= DIFF_WORDS_COLOR
;
3266 options
->word_regex
= arg
+ 14;
3268 else if (!strcmp(arg
, "--word-diff")) {
3269 if (options
->word_diff
== DIFF_WORDS_NONE
)
3270 options
->word_diff
= DIFF_WORDS_PLAIN
;
3272 else if (!prefixcmp(arg
, "--word-diff=")) {
3273 const char *type
= arg
+ 12;
3274 if (!strcmp(type
, "plain"))
3275 options
->word_diff
= DIFF_WORDS_PLAIN
;
3276 else if (!strcmp(type
, "color")) {
3277 DIFF_OPT_SET(options
, COLOR_DIFF
);
3278 options
->word_diff
= DIFF_WORDS_COLOR
;
3280 else if (!strcmp(type
, "porcelain"))
3281 options
->word_diff
= DIFF_WORDS_PORCELAIN
;
3282 else if (!strcmp(type
, "none"))
3283 options
->word_diff
= DIFF_WORDS_NONE
;
3285 die("bad --word-diff argument: %s", type
);
3287 else if ((argcount
= parse_long_opt("word-diff-regex", av
, &optarg
))) {
3288 if (options
->word_diff
== DIFF_WORDS_NONE
)
3289 options
->word_diff
= DIFF_WORDS_PLAIN
;
3290 options
->word_regex
= optarg
;
3293 else if (!strcmp(arg
, "--exit-code"))
3294 DIFF_OPT_SET(options
, EXIT_WITH_STATUS
);
3295 else if (!strcmp(arg
, "--quiet"))
3296 DIFF_OPT_SET(options
, QUICK
);
3297 else if (!strcmp(arg
, "--ext-diff"))
3298 DIFF_OPT_SET(options
, ALLOW_EXTERNAL
);
3299 else if (!strcmp(arg
, "--no-ext-diff"))
3300 DIFF_OPT_CLR(options
, ALLOW_EXTERNAL
);
3301 else if (!strcmp(arg
, "--textconv"))
3302 DIFF_OPT_SET(options
, ALLOW_TEXTCONV
);
3303 else if (!strcmp(arg
, "--no-textconv"))
3304 DIFF_OPT_CLR(options
, ALLOW_TEXTCONV
);
3305 else if (!strcmp(arg
, "--ignore-submodules")) {
3306 DIFF_OPT_SET(options
, OVERRIDE_SUBMODULE_CONFIG
);
3307 handle_ignore_submodules_arg(options
, "all");
3308 } else if (!prefixcmp(arg
, "--ignore-submodules=")) {
3309 DIFF_OPT_SET(options
, OVERRIDE_SUBMODULE_CONFIG
);
3310 handle_ignore_submodules_arg(options
, arg
+ 20);
3311 } else if (!strcmp(arg
, "--submodule"))
3312 DIFF_OPT_SET(options
, SUBMODULE_LOG
);
3313 else if (!prefixcmp(arg
, "--submodule=")) {
3314 if (!strcmp(arg
+ 12, "log"))
3315 DIFF_OPT_SET(options
, SUBMODULE_LOG
);
3319 else if (!strcmp(arg
, "-z"))
3320 options
->line_termination
= 0;
3321 else if ((argcount
= short_opt('l', av
, &optarg
))) {
3322 options
->rename_limit
= strtoul(optarg
, NULL
, 10);
3325 else if ((argcount
= short_opt('S', av
, &optarg
))) {
3326 options
->pickaxe
= optarg
;
3327 options
->pickaxe_opts
|= DIFF_PICKAXE_KIND_S
;
3329 } else if ((argcount
= short_opt('G', av
, &optarg
))) {
3330 options
->pickaxe
= optarg
;
3331 options
->pickaxe_opts
|= DIFF_PICKAXE_KIND_G
;
3334 else if (!strcmp(arg
, "--pickaxe-all"))
3335 options
->pickaxe_opts
|= DIFF_PICKAXE_ALL
;
3336 else if (!strcmp(arg
, "--pickaxe-regex"))
3337 options
->pickaxe_opts
|= DIFF_PICKAXE_REGEX
;
3338 else if ((argcount
= short_opt('O', av
, &optarg
))) {
3339 options
->orderfile
= optarg
;
3342 else if ((argcount
= parse_long_opt("diff-filter", av
, &optarg
))) {
3343 options
->filter
= optarg
;
3346 else if (!strcmp(arg
, "--abbrev"))
3347 options
->abbrev
= DEFAULT_ABBREV
;
3348 else if (!prefixcmp(arg
, "--abbrev=")) {
3349 options
->abbrev
= strtoul(arg
+ 9, NULL
, 10);
3350 if (options
->abbrev
< MINIMUM_ABBREV
)
3351 options
->abbrev
= MINIMUM_ABBREV
;
3352 else if (40 < options
->abbrev
)
3353 options
->abbrev
= 40;
3355 else if ((argcount
= parse_long_opt("src-prefix", av
, &optarg
))) {
3356 options
->a_prefix
= optarg
;
3359 else if ((argcount
= parse_long_opt("dst-prefix", av
, &optarg
))) {
3360 options
->b_prefix
= optarg
;
3363 else if (!strcmp(arg
, "--no-prefix"))
3364 options
->a_prefix
= options
->b_prefix
= "";
3365 else if (opt_arg(arg
, '\0', "inter-hunk-context",
3366 &options
->interhunkcontext
))
3368 else if ((argcount
= parse_long_opt("output", av
, &optarg
))) {
3369 options
->file
= fopen(optarg
, "w");
3371 die_errno("Could not open '%s'", optarg
);
3372 options
->close_file
= 1;
3379 int parse_rename_score(const char **cp_p
)
3381 unsigned long num
, scale
;
3383 const char *cp
= *cp_p
;
3390 if ( !dot
&& ch
== '.' ) {
3393 } else if ( ch
== '%' ) {
3394 scale
= dot
? scale
*100 : 100;
3395 cp
++; /* % is always at the end */
3397 } else if ( ch
>= '0' && ch
<= '9' ) {
3398 if ( scale
< 100000 ) {
3400 num
= (num
*10) + (ch
-'0');
3409 /* user says num divided by scale and we say internally that
3410 * is MAX_SCORE * num / scale.
3412 return (int)((num
>= scale
) ? MAX_SCORE
: (MAX_SCORE
* num
/ scale
));
3415 static int diff_scoreopt_parse(const char *opt
)
3417 int opt1
, opt2
, cmd
;
3423 /* convert the long-form arguments into short-form versions */
3424 if (!prefixcmp(opt
, "break-rewrites")) {
3425 opt
+= strlen("break-rewrites");
3426 if (*opt
== 0 || *opt
++ == '=')
3428 } else if (!prefixcmp(opt
, "find-copies")) {
3429 opt
+= strlen("find-copies");
3430 if (*opt
== 0 || *opt
++ == '=')
3432 } else if (!prefixcmp(opt
, "find-renames")) {
3433 opt
+= strlen("find-renames");
3434 if (*opt
== 0 || *opt
++ == '=')
3438 if (cmd
!= 'M' && cmd
!= 'C' && cmd
!= 'B')
3439 return -1; /* that is not a -M, -C nor -B option */
3441 opt1
= parse_rename_score(&opt
);
3447 else if (*opt
!= '/')
3448 return -1; /* we expect -B80/99 or -B80 */
3451 opt2
= parse_rename_score(&opt
);
3456 return opt1
| (opt2
<< 16);
3459 struct diff_queue_struct diff_queued_diff
;
3461 void diff_q(struct diff_queue_struct
*queue
, struct diff_filepair
*dp
)
3463 if (queue
->alloc
<= queue
->nr
) {
3464 queue
->alloc
= alloc_nr(queue
->alloc
);
3465 queue
->queue
= xrealloc(queue
->queue
,
3466 sizeof(dp
) * queue
->alloc
);
3468 queue
->queue
[queue
->nr
++] = dp
;
3471 struct diff_filepair
*diff_queue(struct diff_queue_struct
*queue
,
3472 struct diff_filespec
*one
,
3473 struct diff_filespec
*two
)
3475 struct diff_filepair
*dp
= xcalloc(1, sizeof(*dp
));
3483 void diff_free_filepair(struct diff_filepair
*p
)
3485 free_filespec(p
->one
);
3486 free_filespec(p
->two
);
3490 /* This is different from find_unique_abbrev() in that
3491 * it stuffs the result with dots for alignment.
3493 const char *diff_unique_abbrev(const unsigned char *sha1
, int len
)
3498 return sha1_to_hex(sha1
);
3500 abbrev
= find_unique_abbrev(sha1
, len
);
3501 abblen
= strlen(abbrev
);
3503 static char hex
[41];
3504 if (len
< abblen
&& abblen
<= len
+ 2)
3505 sprintf(hex
, "%s%.*s", abbrev
, len
+3-abblen
, "..");
3507 sprintf(hex
, "%s...", abbrev
);
3510 return sha1_to_hex(sha1
);
3513 static void diff_flush_raw(struct diff_filepair
*p
, struct diff_options
*opt
)
3515 int line_termination
= opt
->line_termination
;
3516 int inter_name_termination
= line_termination
? '\t' : '\0';
3517 if (opt
->output_prefix
) {
3518 struct strbuf
*msg
= NULL
;
3519 msg
= opt
->output_prefix(opt
, opt
->output_prefix_data
);
3520 fprintf(opt
->file
, "%s", msg
->buf
);
3523 if (!(opt
->output_format
& DIFF_FORMAT_NAME_STATUS
)) {
3524 fprintf(opt
->file
, ":%06o %06o %s ", p
->one
->mode
, p
->two
->mode
,
3525 diff_unique_abbrev(p
->one
->sha1
, opt
->abbrev
));
3526 fprintf(opt
->file
, "%s ", diff_unique_abbrev(p
->two
->sha1
, opt
->abbrev
));
3529 fprintf(opt
->file
, "%c%03d%c", p
->status
, similarity_index(p
),
3530 inter_name_termination
);
3532 fprintf(opt
->file
, "%c%c", p
->status
, inter_name_termination
);
3535 if (p
->status
== DIFF_STATUS_COPIED
||
3536 p
->status
== DIFF_STATUS_RENAMED
) {
3537 const char *name_a
, *name_b
;
3538 name_a
= p
->one
->path
;
3539 name_b
= p
->two
->path
;
3540 strip_prefix(opt
->prefix_length
, &name_a
, &name_b
);
3541 write_name_quoted(name_a
, opt
->file
, inter_name_termination
);
3542 write_name_quoted(name_b
, opt
->file
, line_termination
);
3544 const char *name_a
, *name_b
;
3545 name_a
= p
->one
->mode
? p
->one
->path
: p
->two
->path
;
3547 strip_prefix(opt
->prefix_length
, &name_a
, &name_b
);
3548 write_name_quoted(name_a
, opt
->file
, line_termination
);
3552 int diff_unmodified_pair(struct diff_filepair
*p
)
3554 /* This function is written stricter than necessary to support
3555 * the currently implemented transformers, but the idea is to
3556 * let transformers to produce diff_filepairs any way they want,
3557 * and filter and clean them up here before producing the output.
3559 struct diff_filespec
*one
= p
->one
, *two
= p
->two
;
3561 if (DIFF_PAIR_UNMERGED(p
))
3562 return 0; /* unmerged is interesting */
3564 /* deletion, addition, mode or type change
3565 * and rename are all interesting.
3567 if (DIFF_FILE_VALID(one
) != DIFF_FILE_VALID(two
) ||
3568 DIFF_PAIR_MODE_CHANGED(p
) ||
3569 strcmp(one
->path
, two
->path
))
3572 /* both are valid and point at the same path. that is, we are
3573 * dealing with a change.
3575 if (one
->sha1_valid
&& two
->sha1_valid
&&
3576 !hashcmp(one
->sha1
, two
->sha1
) &&
3577 !one
->dirty_submodule
&& !two
->dirty_submodule
)
3578 return 1; /* no change */
3579 if (!one
->sha1_valid
&& !two
->sha1_valid
)
3580 return 1; /* both look at the same file on the filesystem. */
3584 static void diff_flush_patch(struct diff_filepair
*p
, struct diff_options
*o
)
3586 if (diff_unmodified_pair(p
))
3589 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
3590 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
3591 return; /* no tree diffs in patch format */
3596 static void diff_flush_stat(struct diff_filepair
*p
, struct diff_options
*o
,
3597 struct diffstat_t
*diffstat
)
3599 if (diff_unmodified_pair(p
))
3602 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
3603 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
3604 return; /* no useful stat for tree diffs */
3606 run_diffstat(p
, o
, diffstat
);
3609 static void diff_flush_checkdiff(struct diff_filepair
*p
,
3610 struct diff_options
*o
)
3612 if (diff_unmodified_pair(p
))
3615 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
3616 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
3617 return; /* nothing to check in tree diffs */
3619 run_checkdiff(p
, o
);
3622 int diff_queue_is_empty(void)
3624 struct diff_queue_struct
*q
= &diff_queued_diff
;
3626 for (i
= 0; i
< q
->nr
; i
++)
3627 if (!diff_unmodified_pair(q
->queue
[i
]))
3633 void diff_debug_filespec(struct diff_filespec
*s
, int x
, const char *one
)
3635 fprintf(stderr
, "queue[%d] %s (%s) %s %06o %s\n",
3638 DIFF_FILE_VALID(s
) ? "valid" : "invalid",
3640 s
->sha1_valid
? sha1_to_hex(s
->sha1
) : "");
3641 fprintf(stderr
, "queue[%d] %s size %lu flags %d\n",
3643 s
->size
, s
->xfrm_flags
);
3646 void diff_debug_filepair(const struct diff_filepair
*p
, int i
)
3648 diff_debug_filespec(p
->one
, i
, "one");
3649 diff_debug_filespec(p
->two
, i
, "two");
3650 fprintf(stderr
, "score %d, status %c rename_used %d broken %d\n",
3651 p
->score
, p
->status
? p
->status
: '?',
3652 p
->one
->rename_used
, p
->broken_pair
);
3655 void diff_debug_queue(const char *msg
, struct diff_queue_struct
*q
)
3659 fprintf(stderr
, "%s\n", msg
);
3660 fprintf(stderr
, "q->nr = %d\n", q
->nr
);
3661 for (i
= 0; i
< q
->nr
; i
++) {
3662 struct diff_filepair
*p
= q
->queue
[i
];
3663 diff_debug_filepair(p
, i
);
3668 static void diff_resolve_rename_copy(void)
3671 struct diff_filepair
*p
;
3672 struct diff_queue_struct
*q
= &diff_queued_diff
;
3674 diff_debug_queue("resolve-rename-copy", q
);
3676 for (i
= 0; i
< q
->nr
; i
++) {
3678 p
->status
= 0; /* undecided */
3679 if (DIFF_PAIR_UNMERGED(p
))
3680 p
->status
= DIFF_STATUS_UNMERGED
;
3681 else if (!DIFF_FILE_VALID(p
->one
))
3682 p
->status
= DIFF_STATUS_ADDED
;
3683 else if (!DIFF_FILE_VALID(p
->two
))
3684 p
->status
= DIFF_STATUS_DELETED
;
3685 else if (DIFF_PAIR_TYPE_CHANGED(p
))
3686 p
->status
= DIFF_STATUS_TYPE_CHANGED
;
3688 /* from this point on, we are dealing with a pair
3689 * whose both sides are valid and of the same type, i.e.
3690 * either in-place edit or rename/copy edit.
3692 else if (DIFF_PAIR_RENAME(p
)) {
3694 * A rename might have re-connected a broken
3695 * pair up, causing the pathnames to be the
3696 * same again. If so, that's not a rename at
3697 * all, just a modification..
3699 * Otherwise, see if this source was used for
3700 * multiple renames, in which case we decrement
3701 * the count, and call it a copy.
3703 if (!strcmp(p
->one
->path
, p
->two
->path
))
3704 p
->status
= DIFF_STATUS_MODIFIED
;
3705 else if (--p
->one
->rename_used
> 0)
3706 p
->status
= DIFF_STATUS_COPIED
;
3708 p
->status
= DIFF_STATUS_RENAMED
;
3710 else if (hashcmp(p
->one
->sha1
, p
->two
->sha1
) ||
3711 p
->one
->mode
!= p
->two
->mode
||
3712 p
->one
->dirty_submodule
||
3713 p
->two
->dirty_submodule
||
3714 is_null_sha1(p
->one
->sha1
))
3715 p
->status
= DIFF_STATUS_MODIFIED
;
3717 /* This is a "no-change" entry and should not
3718 * happen anymore, but prepare for broken callers.
3720 error("feeding unmodified %s to diffcore",
3722 p
->status
= DIFF_STATUS_UNKNOWN
;
3725 diff_debug_queue("resolve-rename-copy done", q
);
3728 static int check_pair_status(struct diff_filepair
*p
)
3730 switch (p
->status
) {
3731 case DIFF_STATUS_UNKNOWN
:
3734 die("internal error in diff-resolve-rename-copy");
3740 static void flush_one_pair(struct diff_filepair
*p
, struct diff_options
*opt
)
3742 int fmt
= opt
->output_format
;
3744 if (fmt
& DIFF_FORMAT_CHECKDIFF
)
3745 diff_flush_checkdiff(p
, opt
);
3746 else if (fmt
& (DIFF_FORMAT_RAW
| DIFF_FORMAT_NAME_STATUS
))
3747 diff_flush_raw(p
, opt
);
3748 else if (fmt
& DIFF_FORMAT_NAME
) {
3749 const char *name_a
, *name_b
;
3750 name_a
= p
->two
->path
;
3752 strip_prefix(opt
->prefix_length
, &name_a
, &name_b
);
3753 write_name_quoted(name_a
, opt
->file
, opt
->line_termination
);
3757 static void show_file_mode_name(FILE *file
, const char *newdelete
, struct diff_filespec
*fs
)
3760 fprintf(file
, " %s mode %06o ", newdelete
, fs
->mode
);
3762 fprintf(file
, " %s ", newdelete
);
3763 write_name_quoted(fs
->path
, file
, '\n');
3767 static void show_mode_change(FILE *file
, struct diff_filepair
*p
, int show_name
,
3768 const char *line_prefix
)
3770 if (p
->one
->mode
&& p
->two
->mode
&& p
->one
->mode
!= p
->two
->mode
) {
3771 fprintf(file
, "%s mode change %06o => %06o%c", line_prefix
, p
->one
->mode
,
3772 p
->two
->mode
, show_name
? ' ' : '\n');
3774 write_name_quoted(p
->two
->path
, file
, '\n');
3779 static void show_rename_copy(FILE *file
, const char *renamecopy
, struct diff_filepair
*p
,
3780 const char *line_prefix
)
3782 char *names
= pprint_rename(p
->one
->path
, p
->two
->path
);
3784 fprintf(file
, " %s %s (%d%%)\n", renamecopy
, names
, similarity_index(p
));
3786 show_mode_change(file
, p
, 0, line_prefix
);
3789 static void diff_summary(struct diff_options
*opt
, struct diff_filepair
*p
)
3791 FILE *file
= opt
->file
;
3792 char *line_prefix
= "";
3794 if (opt
->output_prefix
) {
3795 struct strbuf
*buf
= opt
->output_prefix(opt
, opt
->output_prefix_data
);
3796 line_prefix
= buf
->buf
;
3800 case DIFF_STATUS_DELETED
:
3801 fputs(line_prefix
, file
);
3802 show_file_mode_name(file
, "delete", p
->one
);
3804 case DIFF_STATUS_ADDED
:
3805 fputs(line_prefix
, file
);
3806 show_file_mode_name(file
, "create", p
->two
);
3808 case DIFF_STATUS_COPIED
:
3809 fputs(line_prefix
, file
);
3810 show_rename_copy(file
, "copy", p
, line_prefix
);
3812 case DIFF_STATUS_RENAMED
:
3813 fputs(line_prefix
, file
);
3814 show_rename_copy(file
, "rename", p
, line_prefix
);
3818 fprintf(file
, "%s rewrite ", line_prefix
);
3819 write_name_quoted(p
->two
->path
, file
, ' ');
3820 fprintf(file
, "(%d%%)\n", similarity_index(p
));
3822 show_mode_change(file
, p
, !p
->score
, line_prefix
);
3832 static int remove_space(char *line
, int len
)
3838 for (i
= 0; i
< len
; i
++)
3839 if (!isspace((c
= line
[i
])))
3845 static void patch_id_consume(void *priv
, char *line
, unsigned long len
)
3847 struct patch_id_t
*data
= priv
;
3850 /* Ignore line numbers when computing the SHA1 of the patch */
3851 if (!prefixcmp(line
, "@@ -"))
3854 new_len
= remove_space(line
, len
);
3856 git_SHA1_Update(data
->ctx
, line
, new_len
);
3857 data
->patchlen
+= new_len
;
3860 /* returns 0 upon success, and writes result into sha1 */
3861 static int diff_get_patch_id(struct diff_options
*options
, unsigned char *sha1
)
3863 struct diff_queue_struct
*q
= &diff_queued_diff
;
3866 struct patch_id_t data
;
3867 char buffer
[PATH_MAX
* 4 + 20];
3869 git_SHA1_Init(&ctx
);
3870 memset(&data
, 0, sizeof(struct patch_id_t
));
3873 for (i
= 0; i
< q
->nr
; i
++) {
3877 struct diff_filepair
*p
= q
->queue
[i
];
3880 memset(&xpp
, 0, sizeof(xpp
));
3881 memset(&xecfg
, 0, sizeof(xecfg
));
3883 return error("internal diff status error");
3884 if (p
->status
== DIFF_STATUS_UNKNOWN
)
3886 if (diff_unmodified_pair(p
))
3888 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
3889 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
3891 if (DIFF_PAIR_UNMERGED(p
))
3894 diff_fill_sha1_info(p
->one
);
3895 diff_fill_sha1_info(p
->two
);
3896 if (fill_mmfile(&mf1
, p
->one
) < 0 ||
3897 fill_mmfile(&mf2
, p
->two
) < 0)
3898 return error("unable to read files to diff");
3900 len1
= remove_space(p
->one
->path
, strlen(p
->one
->path
));
3901 len2
= remove_space(p
->two
->path
, strlen(p
->two
->path
));
3902 if (p
->one
->mode
== 0)
3903 len1
= snprintf(buffer
, sizeof(buffer
),
3904 "diff--gita/%.*sb/%.*s"
3911 len2
, p
->two
->path
);
3912 else if (p
->two
->mode
== 0)
3913 len1
= snprintf(buffer
, sizeof(buffer
),
3914 "diff--gita/%.*sb/%.*s"
3915 "deletedfilemode%06o"
3921 len1
, p
->one
->path
);
3923 len1
= snprintf(buffer
, sizeof(buffer
),
3924 "diff--gita/%.*sb/%.*s"
3930 len2
, p
->two
->path
);
3931 git_SHA1_Update(&ctx
, buffer
, len1
);
3933 if (diff_filespec_is_binary(p
->one
) ||
3934 diff_filespec_is_binary(p
->two
)) {
3935 git_SHA1_Update(&ctx
, sha1_to_hex(p
->one
->sha1
), 40);
3936 git_SHA1_Update(&ctx
, sha1_to_hex(p
->two
->sha1
), 40);
3943 xdi_diff_outf(&mf1
, &mf2
, patch_id_consume
, &data
,
3947 git_SHA1_Final(sha1
, &ctx
);
3951 int diff_flush_patch_id(struct diff_options
*options
, unsigned char *sha1
)
3953 struct diff_queue_struct
*q
= &diff_queued_diff
;
3955 int result
= diff_get_patch_id(options
, sha1
);
3957 for (i
= 0; i
< q
->nr
; i
++)
3958 diff_free_filepair(q
->queue
[i
]);
3961 DIFF_QUEUE_CLEAR(q
);
3966 static int is_summary_empty(const struct diff_queue_struct
*q
)
3970 for (i
= 0; i
< q
->nr
; i
++) {
3971 const struct diff_filepair
*p
= q
->queue
[i
];
3973 switch (p
->status
) {
3974 case DIFF_STATUS_DELETED
:
3975 case DIFF_STATUS_ADDED
:
3976 case DIFF_STATUS_COPIED
:
3977 case DIFF_STATUS_RENAMED
:
3982 if (p
->one
->mode
&& p
->two
->mode
&&
3983 p
->one
->mode
!= p
->two
->mode
)
3991 void diff_flush(struct diff_options
*options
)
3993 struct diff_queue_struct
*q
= &diff_queued_diff
;
3994 int i
, output_format
= options
->output_format
;
3998 * Order: raw, stat, summary, patch
3999 * or: name/name-status/checkdiff (other bits clear)
4004 if (output_format
& (DIFF_FORMAT_RAW
|
4006 DIFF_FORMAT_NAME_STATUS
|
4007 DIFF_FORMAT_CHECKDIFF
)) {
4008 for (i
= 0; i
< q
->nr
; i
++) {
4009 struct diff_filepair
*p
= q
->queue
[i
];
4010 if (check_pair_status(p
))
4011 flush_one_pair(p
, options
);
4016 if (output_format
& (DIFF_FORMAT_DIFFSTAT
|DIFF_FORMAT_SHORTSTAT
|DIFF_FORMAT_NUMSTAT
)) {
4017 struct diffstat_t diffstat
;
4019 memset(&diffstat
, 0, sizeof(struct diffstat_t
));
4020 for (i
= 0; i
< q
->nr
; i
++) {
4021 struct diff_filepair
*p
= q
->queue
[i
];
4022 if (check_pair_status(p
))
4023 diff_flush_stat(p
, options
, &diffstat
);
4025 if (output_format
& DIFF_FORMAT_NUMSTAT
)
4026 show_numstat(&diffstat
, options
);
4027 if (output_format
& DIFF_FORMAT_DIFFSTAT
)
4028 show_stats(&diffstat
, options
);
4029 if (output_format
& DIFF_FORMAT_SHORTSTAT
)
4030 show_shortstats(&diffstat
, options
);
4031 free_diffstat_info(&diffstat
);
4034 if (output_format
& DIFF_FORMAT_DIRSTAT
)
4035 show_dirstat(options
);
4037 if (output_format
& DIFF_FORMAT_SUMMARY
&& !is_summary_empty(q
)) {
4038 for (i
= 0; i
< q
->nr
; i
++) {
4039 diff_summary(options
, q
->queue
[i
]);
4044 if (output_format
& DIFF_FORMAT_NO_OUTPUT
&&
4045 DIFF_OPT_TST(options
, EXIT_WITH_STATUS
) &&
4046 DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
)) {
4048 * run diff_flush_patch for the exit status. setting
4049 * options->file to /dev/null should be safe, becaue we
4050 * aren't supposed to produce any output anyway.
4052 if (options
->close_file
)
4053 fclose(options
->file
);
4054 options
->file
= fopen("/dev/null", "w");
4056 die_errno("Could not open /dev/null");
4057 options
->close_file
= 1;
4058 for (i
= 0; i
< q
->nr
; i
++) {
4059 struct diff_filepair
*p
= q
->queue
[i
];
4060 if (check_pair_status(p
))
4061 diff_flush_patch(p
, options
);
4062 if (options
->found_changes
)
4067 if (output_format
& DIFF_FORMAT_PATCH
) {
4069 putc(options
->line_termination
, options
->file
);
4070 if (options
->stat_sep
) {
4071 /* attach patch instead of inline */
4072 fputs(options
->stat_sep
, options
->file
);
4076 for (i
= 0; i
< q
->nr
; i
++) {
4077 struct diff_filepair
*p
= q
->queue
[i
];
4078 if (check_pair_status(p
))
4079 diff_flush_patch(p
, options
);
4083 if (output_format
& DIFF_FORMAT_CALLBACK
)
4084 options
->format_callback(q
, options
, options
->format_callback_data
);
4086 for (i
= 0; i
< q
->nr
; i
++)
4087 diff_free_filepair(q
->queue
[i
]);
4090 DIFF_QUEUE_CLEAR(q
);
4091 if (options
->close_file
)
4092 fclose(options
->file
);
4095 * Report the content-level differences with HAS_CHANGES;
4096 * diff_addremove/diff_change does not set the bit when
4097 * DIFF_FROM_CONTENTS is in effect (e.g. with -w).
4099 if (DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
)) {
4100 if (options
->found_changes
)
4101 DIFF_OPT_SET(options
, HAS_CHANGES
);
4103 DIFF_OPT_CLR(options
, HAS_CHANGES
);
4107 static void diffcore_apply_filter(const char *filter
)
4110 struct diff_queue_struct
*q
= &diff_queued_diff
;
4111 struct diff_queue_struct outq
;
4112 DIFF_QUEUE_CLEAR(&outq
);
4117 if (strchr(filter
, DIFF_STATUS_FILTER_AON
)) {
4119 for (i
= found
= 0; !found
&& i
< q
->nr
; i
++) {
4120 struct diff_filepair
*p
= q
->queue
[i
];
4121 if (((p
->status
== DIFF_STATUS_MODIFIED
) &&
4123 strchr(filter
, DIFF_STATUS_FILTER_BROKEN
)) ||
4125 strchr(filter
, DIFF_STATUS_MODIFIED
)))) ||
4126 ((p
->status
!= DIFF_STATUS_MODIFIED
) &&
4127 strchr(filter
, p
->status
)))
4133 /* otherwise we will clear the whole queue
4134 * by copying the empty outq at the end of this
4135 * function, but first clear the current entries
4138 for (i
= 0; i
< q
->nr
; i
++)
4139 diff_free_filepair(q
->queue
[i
]);
4142 /* Only the matching ones */
4143 for (i
= 0; i
< q
->nr
; i
++) {
4144 struct diff_filepair
*p
= q
->queue
[i
];
4146 if (((p
->status
== DIFF_STATUS_MODIFIED
) &&
4148 strchr(filter
, DIFF_STATUS_FILTER_BROKEN
)) ||
4150 strchr(filter
, DIFF_STATUS_MODIFIED
)))) ||
4151 ((p
->status
!= DIFF_STATUS_MODIFIED
) &&
4152 strchr(filter
, p
->status
)))
4155 diff_free_filepair(p
);
4162 /* Check whether two filespecs with the same mode and size are identical */
4163 static int diff_filespec_is_identical(struct diff_filespec
*one
,
4164 struct diff_filespec
*two
)
4166 if (S_ISGITLINK(one
->mode
))
4168 if (diff_populate_filespec(one
, 0))
4170 if (diff_populate_filespec(two
, 0))
4172 return !memcmp(one
->data
, two
->data
, one
->size
);
4175 static void diffcore_skip_stat_unmatch(struct diff_options
*diffopt
)
4178 struct diff_queue_struct
*q
= &diff_queued_diff
;
4179 struct diff_queue_struct outq
;
4180 DIFF_QUEUE_CLEAR(&outq
);
4182 for (i
= 0; i
< q
->nr
; i
++) {
4183 struct diff_filepair
*p
= q
->queue
[i
];
4186 * 1. Entries that come from stat info dirtiness
4187 * always have both sides (iow, not create/delete),
4188 * one side of the object name is unknown, with
4189 * the same mode and size. Keep the ones that
4190 * do not match these criteria. They have real
4193 * 2. At this point, the file is known to be modified,
4194 * with the same mode and size, and the object
4195 * name of one side is unknown. Need to inspect
4196 * the identical contents.
4198 if (!DIFF_FILE_VALID(p
->one
) || /* (1) */
4199 !DIFF_FILE_VALID(p
->two
) ||
4200 (p
->one
->sha1_valid
&& p
->two
->sha1_valid
) ||
4201 (p
->one
->mode
!= p
->two
->mode
) ||
4202 diff_populate_filespec(p
->one
, 1) ||
4203 diff_populate_filespec(p
->two
, 1) ||
4204 (p
->one
->size
!= p
->two
->size
) ||
4205 !diff_filespec_is_identical(p
->one
, p
->two
)) /* (2) */
4209 * The caller can subtract 1 from skip_stat_unmatch
4210 * to determine how many paths were dirty only
4211 * due to stat info mismatch.
4213 if (!DIFF_OPT_TST(diffopt
, NO_INDEX
))
4214 diffopt
->skip_stat_unmatch
++;
4215 diff_free_filepair(p
);
4222 static int diffnamecmp(const void *a_
, const void *b_
)
4224 const struct diff_filepair
*a
= *((const struct diff_filepair
**)a_
);
4225 const struct diff_filepair
*b
= *((const struct diff_filepair
**)b_
);
4226 const char *name_a
, *name_b
;
4228 name_a
= a
->one
? a
->one
->path
: a
->two
->path
;
4229 name_b
= b
->one
? b
->one
->path
: b
->two
->path
;
4230 return strcmp(name_a
, name_b
);
4233 void diffcore_fix_diff_index(struct diff_options
*options
)
4235 struct diff_queue_struct
*q
= &diff_queued_diff
;
4236 qsort(q
->queue
, q
->nr
, sizeof(q
->queue
[0]), diffnamecmp
);
4239 void diffcore_std(struct diff_options
*options
)
4241 if (options
->skip_stat_unmatch
)
4242 diffcore_skip_stat_unmatch(options
);
4243 if (!options
->found_follow
) {
4244 /* See try_to_follow_renames() in tree-diff.c */
4245 if (options
->break_opt
!= -1)
4246 diffcore_break(options
->break_opt
);
4247 if (options
->detect_rename
)
4248 diffcore_rename(options
);
4249 if (options
->break_opt
!= -1)
4250 diffcore_merge_broken();
4252 if (options
->pickaxe
)
4253 diffcore_pickaxe(options
);
4254 if (options
->orderfile
)
4255 diffcore_order(options
->orderfile
);
4256 if (!options
->found_follow
)
4257 /* See try_to_follow_renames() in tree-diff.c */
4258 diff_resolve_rename_copy();
4259 diffcore_apply_filter(options
->filter
);
4261 if (diff_queued_diff
.nr
&& !DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
))
4262 DIFF_OPT_SET(options
, HAS_CHANGES
);
4264 DIFF_OPT_CLR(options
, HAS_CHANGES
);
4266 options
->found_follow
= 0;
4269 int diff_result_code(struct diff_options
*opt
, int status
)
4272 if (!DIFF_OPT_TST(opt
, EXIT_WITH_STATUS
) &&
4273 !(opt
->output_format
& DIFF_FORMAT_CHECKDIFF
))
4275 if (DIFF_OPT_TST(opt
, EXIT_WITH_STATUS
) &&
4276 DIFF_OPT_TST(opt
, HAS_CHANGES
))
4278 if ((opt
->output_format
& DIFF_FORMAT_CHECKDIFF
) &&
4279 DIFF_OPT_TST(opt
, CHECK_FAILED
))
4285 * Shall changes to this submodule be ignored?
4287 * Submodule changes can be configured to be ignored separately for each path,
4288 * but that configuration can be overridden from the command line.
4290 static int is_submodule_ignored(const char *path
, struct diff_options
*options
)
4293 unsigned orig_flags
= options
->flags
;
4294 if (!DIFF_OPT_TST(options
, OVERRIDE_SUBMODULE_CONFIG
))
4295 set_diffopt_flags_from_submodule_config(options
, path
);
4296 if (DIFF_OPT_TST(options
, IGNORE_SUBMODULES
))
4298 options
->flags
= orig_flags
;
4302 void diff_addremove(struct diff_options
*options
,
4303 int addremove
, unsigned mode
,
4304 const unsigned char *sha1
,
4305 const char *concatpath
, unsigned dirty_submodule
)
4307 struct diff_filespec
*one
, *two
;
4309 if (S_ISGITLINK(mode
) && is_submodule_ignored(concatpath
, options
))
4312 /* This may look odd, but it is a preparation for
4313 * feeding "there are unchanged files which should
4314 * not produce diffs, but when you are doing copy
4315 * detection you would need them, so here they are"
4316 * entries to the diff-core. They will be prefixed
4317 * with something like '=' or '*' (I haven't decided
4318 * which but should not make any difference).
4319 * Feeding the same new and old to diff_change()
4320 * also has the same effect.
4321 * Before the final output happens, they are pruned after
4322 * merged into rename/copy pairs as appropriate.
4324 if (DIFF_OPT_TST(options
, REVERSE_DIFF
))
4325 addremove
= (addremove
== '+' ? '-' :
4326 addremove
== '-' ? '+' : addremove
);
4328 if (options
->prefix
&&
4329 strncmp(concatpath
, options
->prefix
, options
->prefix_length
))
4332 one
= alloc_filespec(concatpath
);
4333 two
= alloc_filespec(concatpath
);
4335 if (addremove
!= '+')
4336 fill_filespec(one
, sha1
, mode
);
4337 if (addremove
!= '-') {
4338 fill_filespec(two
, sha1
, mode
);
4339 two
->dirty_submodule
= dirty_submodule
;
4342 diff_queue(&diff_queued_diff
, one
, two
);
4343 if (!DIFF_OPT_TST(options
, DIFF_FROM_CONTENTS
))
4344 DIFF_OPT_SET(options
, HAS_CHANGES
);
4347 void diff_change(struct diff_options
*options
,
4348 unsigned old_mode
, unsigned new_mode
,
4349 const unsigned char *old_sha1
,
4350 const unsigned char *new_sha1
,
4351 const char *concatpath
,
4352 unsigned old_dirty_submodule
, unsigned new_dirty_submodule
)
4354 struct diff_filespec
*one
, *two
;
4356 if (S_ISGITLINK(old_mode
) && S_ISGITLINK(new_mode
) &&
4357 is_submodule_ignored(concatpath
, options
))
4360 if (DIFF_OPT_TST(options
, REVERSE_DIFF
)) {
4362 const unsigned char *tmp_c
;
4363 tmp
= old_mode
; old_mode
= new_mode
; new_mode
= tmp
;
4364 tmp_c
= old_sha1
; old_sha1
= new_sha1
; new_sha1
= tmp_c
;
4365 tmp
= old_dirty_submodule
; old_dirty_submodule
= new_dirty_submodule
;
4366 new_dirty_submodule
= tmp
;
4369 if (options
->prefix
&&
4370 strncmp(concatpath
, options
->prefix
, options
->prefix_length
))
4373 one
= alloc_filespec(concatpath
);
4374 two
= alloc_filespec(concatpath
);
4375 fill_filespec(one
, old_sha1
, old_mode
);
4376 fill_filespec(two
, new_sha1
, new_mode
);
4377 one
->dirty_submodule
= old_dirty_submodule
;
4378 two
->dirty_submodule
= new_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_unmerge(struct diff_options
*options
,
4387 unsigned mode
, const unsigned char *sha1
)
4389 struct diff_filespec
*one
, *two
;
4391 if (options
->prefix
&&
4392 strncmp(path
, options
->prefix
, options
->prefix_length
))
4395 one
= alloc_filespec(path
);
4396 two
= alloc_filespec(path
);
4397 fill_filespec(one
, sha1
, mode
);
4398 diff_queue(&diff_queued_diff
, one
, two
)->is_unmerged
= 1;
4401 static char *run_textconv(const char *pgm
, struct diff_filespec
*spec
,
4404 struct diff_tempfile
*temp
;
4405 const char *argv
[3];
4406 const char **arg
= argv
;
4407 struct child_process child
;
4408 struct strbuf buf
= STRBUF_INIT
;
4411 temp
= prepare_temp_file(spec
->path
, spec
);
4413 *arg
++ = temp
->name
;
4416 memset(&child
, 0, sizeof(child
));
4417 child
.use_shell
= 1;
4420 if (start_command(&child
)) {
4425 if (strbuf_read(&buf
, child
.out
, 0) < 0)
4426 err
= error("error reading from textconv command '%s'", pgm
);
4429 if (finish_command(&child
) || err
) {
4430 strbuf_release(&buf
);
4436 return strbuf_detach(&buf
, outsize
);
4439 size_t fill_textconv(struct userdiff_driver
*driver
,
4440 struct diff_filespec
*df
,
4445 if (!driver
|| !driver
->textconv
) {
4446 if (!DIFF_FILE_VALID(df
)) {
4450 if (diff_populate_filespec(df
, 0))
4451 die("unable to read files to diff");
4456 if (driver
->textconv_cache
&& df
->sha1_valid
) {
4457 *outbuf
= notes_cache_get(driver
->textconv_cache
, df
->sha1
,
4463 *outbuf
= run_textconv(driver
->textconv
, df
, &size
);
4465 die("unable to read files to diff");
4467 if (driver
->textconv_cache
&& df
->sha1_valid
) {
4468 /* ignore errors, as we might be in a readonly repository */
4469 notes_cache_put(driver
->textconv_cache
, df
->sha1
, *outbuf
,
4472 * we could save up changes and flush them all at the end,
4473 * but we would need an extra call after all diffing is done.
4474 * Since generating a cache entry is the slow path anyway,
4475 * this extra overhead probably isn't a big deal.
4477 notes_cache_write(driver
->textconv_cache
);