2 * Copyright (C) 2005 Junio C Hamano
9 #include "xdiff-interface.h"
13 #ifdef NO_FAST_WORKING_DIRECTORY
14 #define FAST_WORKING_DIRECTORY 0
16 #define FAST_WORKING_DIRECTORY 1
19 static int diff_detect_rename_default
;
20 static int diff_rename_limit_default
= -1;
21 static int diff_use_color_default
;
23 static char diff_colors
[][COLOR_MAXLEN
] = {
25 "", /* PLAIN (normal) */
26 "\033[1m", /* METAINFO (bold) */
27 "\033[36m", /* FRAGINFO (cyan) */
28 "\033[31m", /* OLD (red) */
29 "\033[32m", /* NEW (green) */
30 "\033[33m", /* COMMIT (yellow) */
31 "\033[41m", /* WHITESPACE (red background) */
34 static int parse_diff_color_slot(const char *var
, int ofs
)
36 if (!strcasecmp(var
+ofs
, "plain"))
38 if (!strcasecmp(var
+ofs
, "meta"))
40 if (!strcasecmp(var
+ofs
, "frag"))
42 if (!strcasecmp(var
+ofs
, "old"))
44 if (!strcasecmp(var
+ofs
, "new"))
46 if (!strcasecmp(var
+ofs
, "commit"))
48 if (!strcasecmp(var
+ofs
, "whitespace"))
49 return DIFF_WHITESPACE
;
50 die("bad config variable '%s'", var
);
53 static struct ll_diff_driver
{
55 struct ll_diff_driver
*next
;
57 } *user_diff
, **user_diff_tail
;
60 * Currently there is only "diff.<drivername>.command" variable;
61 * because there are "diff.color.<slot>" variables, we are parsing
62 * this in a bit convoluted way to allow low level diff driver
65 static int parse_lldiff_command(const char *var
, const char *ep
, const char *value
)
69 struct ll_diff_driver
*drv
;
73 for (drv
= user_diff
; drv
; drv
= drv
->next
)
74 if (!strncmp(drv
->name
, name
, namelen
) && !drv
->name
[namelen
])
78 drv
= xcalloc(1, sizeof(struct ll_diff_driver
));
79 namebuf
= xmalloc(namelen
+ 1);
80 memcpy(namebuf
, name
, namelen
);
85 user_diff_tail
= &user_diff
;
86 *user_diff_tail
= drv
;
87 user_diff_tail
= &(drv
->next
);
91 return error("%s: lacks value", var
);
92 drv
->cmd
= strdup(value
);
97 * These are to give UI layer defaults.
98 * The core-level commands such as git-diff-files should
99 * never be affected by the setting of diff.renames
100 * the user happens to have in the configuration file.
102 int git_diff_ui_config(const char *var
, const char *value
)
104 if (!strcmp(var
, "diff.renamelimit")) {
105 diff_rename_limit_default
= git_config_int(var
, value
);
108 if (!strcmp(var
, "diff.color") || !strcmp(var
, "color.diff")) {
109 diff_use_color_default
= git_config_colorbool(var
, value
);
112 if (!strcmp(var
, "diff.renames")) {
114 diff_detect_rename_default
= DIFF_DETECT_RENAME
;
115 else if (!strcasecmp(value
, "copies") ||
116 !strcasecmp(value
, "copy"))
117 diff_detect_rename_default
= DIFF_DETECT_COPY
;
118 else if (git_config_bool(var
,value
))
119 diff_detect_rename_default
= DIFF_DETECT_RENAME
;
122 if (!prefixcmp(var
, "diff.")) {
123 const char *ep
= strrchr(var
, '.');
125 if (ep
!= var
+ 4 && !strcmp(ep
, ".command"))
126 return parse_lldiff_command(var
, ep
, value
);
128 if (!prefixcmp(var
, "diff.color.") || !prefixcmp(var
, "color.diff.")) {
129 int slot
= parse_diff_color_slot(var
, 11);
130 color_parse(value
, var
, diff_colors
[slot
]);
134 return git_default_config(var
, value
);
137 static char *quote_one(const char *str
)
144 needlen
= quote_c_style(str
, NULL
, NULL
, 0);
147 xp
= xmalloc(needlen
+ 1);
148 quote_c_style(str
, xp
, NULL
, 0);
152 static char *quote_two(const char *one
, const char *two
)
154 int need_one
= quote_c_style(one
, NULL
, NULL
, 1);
155 int need_two
= quote_c_style(two
, NULL
, NULL
, 1);
158 if (need_one
+ need_two
) {
159 if (!need_one
) need_one
= strlen(one
);
160 if (!need_two
) need_one
= strlen(two
);
162 xp
= xmalloc(need_one
+ need_two
+ 3);
164 quote_c_style(one
, xp
+ 1, NULL
, 1);
165 quote_c_style(two
, xp
+ need_one
+ 1, NULL
, 1);
166 strcpy(xp
+ need_one
+ need_two
+ 1, "\"");
169 need_one
= strlen(one
);
170 need_two
= strlen(two
);
171 xp
= xmalloc(need_one
+ need_two
+ 1);
173 strcpy(xp
+ need_one
, two
);
177 static const char *external_diff(void)
179 static const char *external_diff_cmd
= NULL
;
180 static int done_preparing
= 0;
183 return external_diff_cmd
;
184 external_diff_cmd
= getenv("GIT_EXTERNAL_DIFF");
186 return external_diff_cmd
;
189 static struct diff_tempfile
{
190 const char *name
; /* filename external diff should read from */
193 char tmp_path
[PATH_MAX
];
196 static int count_lines(const char *data
, int size
)
198 int count
, ch
, completely_empty
= 1, nl_just_seen
= 0;
205 completely_empty
= 0;
209 completely_empty
= 0;
212 if (completely_empty
)
215 count
++; /* no trailing newline */
219 static void print_line_count(int count
)
229 printf("1,%d", count
);
234 static void copy_file(int prefix
, const char *data
, int size
,
235 const char *set
, const char *reset
)
237 int ch
, nl_just_seen
= 1;
246 fputs(reset
, stdout
);
252 printf("%s\n\\ No newline at end of file\n", reset
);
255 static void emit_rewrite_diff(const char *name_a
,
257 struct diff_filespec
*one
,
258 struct diff_filespec
*two
,
262 const char *name_a_tab
, *name_b_tab
;
263 const char *metainfo
= diff_get_color(color_diff
, DIFF_METAINFO
);
264 const char *fraginfo
= diff_get_color(color_diff
, DIFF_FRAGINFO
);
265 const char *old
= diff_get_color(color_diff
, DIFF_FILE_OLD
);
266 const char *new = diff_get_color(color_diff
, DIFF_FILE_NEW
);
267 const char *reset
= diff_get_color(color_diff
, DIFF_RESET
);
269 name_a
+= (*name_a
== '/');
270 name_b
+= (*name_b
== '/');
271 name_a_tab
= strchr(name_a
, ' ') ? "\t" : "";
272 name_b_tab
= strchr(name_b
, ' ') ? "\t" : "";
274 diff_populate_filespec(one
, 0);
275 diff_populate_filespec(two
, 0);
276 lc_a
= count_lines(one
->data
, one
->size
);
277 lc_b
= count_lines(two
->data
, two
->size
);
278 printf("%s--- a/%s%s%s\n%s+++ b/%s%s%s\n%s@@ -",
279 metainfo
, name_a
, name_a_tab
, reset
,
280 metainfo
, name_b
, name_b_tab
, reset
, fraginfo
);
281 print_line_count(lc_a
);
283 print_line_count(lc_b
);
284 printf(" @@%s\n", reset
);
286 copy_file('-', one
->data
, one
->size
, old
, reset
);
288 copy_file('+', two
->data
, two
->size
, new, reset
);
291 static int fill_mmfile(mmfile_t
*mf
, struct diff_filespec
*one
)
293 if (!DIFF_FILE_VALID(one
)) {
294 mf
->ptr
= (char *)""; /* does not matter */
298 else if (diff_populate_filespec(one
, 0))
301 mf
->size
= one
->size
;
305 struct diff_words_buffer
{
308 long current
; /* output pointer */
309 int suppressed_newline
;
312 static void diff_words_append(char *line
, unsigned long len
,
313 struct diff_words_buffer
*buffer
)
315 if (buffer
->text
.size
+ len
> buffer
->alloc
) {
316 buffer
->alloc
= (buffer
->text
.size
+ len
) * 3 / 2;
317 buffer
->text
.ptr
= xrealloc(buffer
->text
.ptr
, buffer
->alloc
);
321 memcpy(buffer
->text
.ptr
+ buffer
->text
.size
, line
, len
);
322 buffer
->text
.size
+= len
;
325 struct diff_words_data
{
326 struct xdiff_emit_state xm
;
327 struct diff_words_buffer minus
, plus
;
330 static void print_word(struct diff_words_buffer
*buffer
, int len
, int color
,
331 int suppress_newline
)
339 ptr
= buffer
->text
.ptr
+ buffer
->current
;
340 buffer
->current
+= len
;
342 if (ptr
[len
- 1] == '\n') {
347 fputs(diff_get_color(1, color
), stdout
);
348 fwrite(ptr
, len
, 1, stdout
);
349 fputs(diff_get_color(1, DIFF_RESET
), stdout
);
352 if (suppress_newline
)
353 buffer
->suppressed_newline
= 1;
359 static void fn_out_diff_words_aux(void *priv
, char *line
, unsigned long len
)
361 struct diff_words_data
*diff_words
= priv
;
363 if (diff_words
->minus
.suppressed_newline
) {
366 diff_words
->minus
.suppressed_newline
= 0;
372 print_word(&diff_words
->minus
, len
, DIFF_FILE_OLD
, 1);
375 print_word(&diff_words
->plus
, len
, DIFF_FILE_NEW
, 0);
378 print_word(&diff_words
->plus
, len
, DIFF_PLAIN
, 0);
379 diff_words
->minus
.current
+= len
;
384 /* this executes the word diff on the accumulated buffers */
385 static void diff_words_show(struct diff_words_data
*diff_words
)
390 mmfile_t minus
, plus
;
393 memset(&xecfg
, 0, sizeof(xecfg
));
394 minus
.size
= diff_words
->minus
.text
.size
;
395 minus
.ptr
= xmalloc(minus
.size
);
396 memcpy(minus
.ptr
, diff_words
->minus
.text
.ptr
, minus
.size
);
397 for (i
= 0; i
< minus
.size
; i
++)
398 if (isspace(minus
.ptr
[i
]))
400 diff_words
->minus
.current
= 0;
402 plus
.size
= diff_words
->plus
.text
.size
;
403 plus
.ptr
= xmalloc(plus
.size
);
404 memcpy(plus
.ptr
, diff_words
->plus
.text
.ptr
, plus
.size
);
405 for (i
= 0; i
< plus
.size
; i
++)
406 if (isspace(plus
.ptr
[i
]))
408 diff_words
->plus
.current
= 0;
410 xpp
.flags
= XDF_NEED_MINIMAL
;
411 xecfg
.ctxlen
= diff_words
->minus
.alloc
+ diff_words
->plus
.alloc
;
412 ecb
.outf
= xdiff_outf
;
413 ecb
.priv
= diff_words
;
414 diff_words
->xm
.consume
= fn_out_diff_words_aux
;
415 xdl_diff(&minus
, &plus
, &xpp
, &xecfg
, &ecb
);
419 diff_words
->minus
.text
.size
= diff_words
->plus
.text
.size
= 0;
421 if (diff_words
->minus
.suppressed_newline
) {
423 diff_words
->minus
.suppressed_newline
= 0;
427 struct emit_callback
{
428 struct xdiff_emit_state xm
;
429 int nparents
, color_diff
;
430 const char **label_path
;
431 struct diff_words_data
*diff_words
;
435 static void free_diff_words_data(struct emit_callback
*ecbdata
)
437 if (ecbdata
->diff_words
) {
439 if (ecbdata
->diff_words
->minus
.text
.size
||
440 ecbdata
->diff_words
->plus
.text
.size
)
441 diff_words_show(ecbdata
->diff_words
);
443 if (ecbdata
->diff_words
->minus
.text
.ptr
)
444 free (ecbdata
->diff_words
->minus
.text
.ptr
);
445 if (ecbdata
->diff_words
->plus
.text
.ptr
)
446 free (ecbdata
->diff_words
->plus
.text
.ptr
);
447 free(ecbdata
->diff_words
);
448 ecbdata
->diff_words
= NULL
;
452 const char *diff_get_color(int diff_use_color
, enum color_diff ix
)
455 return diff_colors
[ix
];
459 static void emit_line(const char *set
, const char *reset
, const char *line
, int len
)
461 if (len
> 0 && line
[len
-1] == '\n')
464 fwrite(line
, len
, 1, stdout
);
468 static void emit_line_with_ws(int nparents
,
469 const char *set
, const char *reset
, const char *ws
,
470 const char *line
, int len
)
473 int last_tab_in_indent
= -1;
474 int last_space_in_indent
= -1;
477 int need_highlight_leading_space
= 0;
478 /* The line is a newly added line. Does it have funny leading
479 * whitespaces? In indent, SP should never precede a TAB.
481 for (i
= col0
; i
< len
; i
++) {
482 if (line
[i
] == '\t') {
483 last_tab_in_indent
= i
;
484 if (0 <= last_space_in_indent
)
485 need_highlight_leading_space
= 1;
487 else if (line
[i
] == ' ')
488 last_space_in_indent
= i
;
493 fwrite(line
, col0
, 1, stdout
);
494 fputs(reset
, stdout
);
495 if (((i
== len
) || line
[i
] == '\n') && i
!= col0
) {
496 /* The whole line was indent */
497 emit_line(ws
, reset
, line
+ col0
, len
- col0
);
501 if (need_highlight_leading_space
) {
502 while (i
< last_tab_in_indent
) {
503 if (line
[i
] == ' ') {
506 fputs(reset
, stdout
);
514 if (line
[tail
] == '\n' && i
< tail
)
517 if (!isspace(line
[tail
]))
521 if ((i
< tail
&& line
[tail
+ 1] != '\n')) {
522 /* This has whitespace between tail+1..len */
524 fwrite(line
+ i
, tail
- i
+ 1, 1, stdout
);
525 fputs(reset
, stdout
);
526 emit_line(ws
, reset
, line
+ tail
+ 1, len
- tail
- 1);
529 emit_line(set
, reset
, line
+ i
, len
- i
);
532 static void emit_add_line(const char *reset
, struct emit_callback
*ecbdata
, const char *line
, int len
)
534 const char *ws
= diff_get_color(ecbdata
->color_diff
, DIFF_WHITESPACE
);
535 const char *set
= diff_get_color(ecbdata
->color_diff
, DIFF_FILE_NEW
);
538 emit_line(set
, reset
, line
, len
);
540 emit_line_with_ws(ecbdata
->nparents
, set
, reset
, ws
,
544 static void fn_out_consume(void *priv
, char *line
, unsigned long len
)
548 struct emit_callback
*ecbdata
= priv
;
549 const char *set
= diff_get_color(ecbdata
->color_diff
, DIFF_METAINFO
);
550 const char *reset
= diff_get_color(ecbdata
->color_diff
, DIFF_RESET
);
552 *(ecbdata
->found_changesp
) = 1;
554 if (ecbdata
->label_path
[0]) {
555 const char *name_a_tab
, *name_b_tab
;
557 name_a_tab
= strchr(ecbdata
->label_path
[0], ' ') ? "\t" : "";
558 name_b_tab
= strchr(ecbdata
->label_path
[1], ' ') ? "\t" : "";
560 printf("%s--- %s%s%s\n",
561 set
, ecbdata
->label_path
[0], reset
, name_a_tab
);
562 printf("%s+++ %s%s%s\n",
563 set
, ecbdata
->label_path
[1], reset
, name_b_tab
);
564 ecbdata
->label_path
[0] = ecbdata
->label_path
[1] = NULL
;
567 /* This is not really necessary for now because
568 * this codepath only deals with two-way diffs.
570 for (i
= 0; i
< len
&& line
[i
] == '@'; i
++)
572 if (2 <= i
&& i
< len
&& line
[i
] == ' ') {
573 ecbdata
->nparents
= i
- 1;
574 emit_line(diff_get_color(ecbdata
->color_diff
, DIFF_FRAGINFO
),
579 if (len
< ecbdata
->nparents
) {
581 emit_line(reset
, reset
, line
, len
);
586 if (ecbdata
->diff_words
&& ecbdata
->nparents
!= 1)
587 /* fall back to normal diff */
588 free_diff_words_data(ecbdata
);
589 if (ecbdata
->diff_words
) {
590 if (line
[0] == '-') {
591 diff_words_append(line
, len
,
592 &ecbdata
->diff_words
->minus
);
594 } else if (line
[0] == '+') {
595 diff_words_append(line
, len
,
596 &ecbdata
->diff_words
->plus
);
599 if (ecbdata
->diff_words
->minus
.text
.size
||
600 ecbdata
->diff_words
->plus
.text
.size
)
601 diff_words_show(ecbdata
->diff_words
);
604 emit_line(set
, reset
, line
, len
);
607 for (i
= 0; i
< ecbdata
->nparents
&& len
; i
++) {
609 color
= DIFF_FILE_OLD
;
610 else if (line
[i
] == '+')
611 color
= DIFF_FILE_NEW
;
614 if (color
!= DIFF_FILE_NEW
) {
615 emit_line(diff_get_color(ecbdata
->color_diff
, color
),
619 emit_add_line(reset
, ecbdata
, line
, len
);
622 static char *pprint_rename(const char *a
, const char *b
)
627 int pfx_length
, sfx_length
;
628 int len_a
= strlen(a
);
629 int len_b
= strlen(b
);
630 int qlen_a
= quote_c_style(a
, NULL
, NULL
, 0);
631 int qlen_b
= quote_c_style(b
, NULL
, NULL
, 0);
633 if (qlen_a
|| qlen_b
) {
634 if (qlen_a
) len_a
= qlen_a
;
635 if (qlen_b
) len_b
= qlen_b
;
636 name
= xmalloc( len_a
+ len_b
+ 5 );
638 quote_c_style(a
, name
, NULL
, 0);
640 memcpy(name
, a
, len_a
);
641 memcpy(name
+ len_a
, " => ", 4);
643 quote_c_style(b
, name
+ len_a
+ 4, NULL
, 0);
645 memcpy(name
+ len_a
+ 4, b
, len_b
+ 1);
649 /* Find common prefix */
651 while (*old
&& *new && *old
== *new) {
653 pfx_length
= old
- a
+ 1;
658 /* Find common suffix */
662 while (a
<= old
&& b
<= new && *old
== *new) {
664 sfx_length
= len_a
- (old
- a
);
670 * pfx{mid-a => mid-b}sfx
671 * {pfx-a => pfx-b}sfx
672 * pfx{sfx-a => sfx-b}
675 if (pfx_length
+ sfx_length
) {
676 int a_midlen
= len_a
- pfx_length
- sfx_length
;
677 int b_midlen
= len_b
- pfx_length
- sfx_length
;
678 if (a_midlen
< 0) a_midlen
= 0;
679 if (b_midlen
< 0) b_midlen
= 0;
681 name
= xmalloc(pfx_length
+ a_midlen
+ b_midlen
+ sfx_length
+ 7);
682 sprintf(name
, "%.*s{%.*s => %.*s}%s",
684 a_midlen
, a
+ pfx_length
,
685 b_midlen
, b
+ pfx_length
,
686 a
+ len_a
- sfx_length
);
689 name
= xmalloc(len_a
+ len_b
+ 5);
690 sprintf(name
, "%s => %s", a
, b
);
696 struct xdiff_emit_state xm
;
700 struct diffstat_file
{
702 unsigned is_unmerged
:1;
703 unsigned is_binary
:1;
704 unsigned is_renamed
:1;
705 unsigned int added
, deleted
;
709 static struct diffstat_file
*diffstat_add(struct diffstat_t
*diffstat
,
713 struct diffstat_file
*x
;
714 x
= xcalloc(sizeof (*x
), 1);
715 if (diffstat
->nr
== diffstat
->alloc
) {
716 diffstat
->alloc
= alloc_nr(diffstat
->alloc
);
717 diffstat
->files
= xrealloc(diffstat
->files
,
718 diffstat
->alloc
* sizeof(x
));
720 diffstat
->files
[diffstat
->nr
++] = x
;
722 x
->name
= pprint_rename(name_a
, name_b
);
726 x
->name
= xstrdup(name_a
);
730 static void diffstat_consume(void *priv
, char *line
, unsigned long len
)
732 struct diffstat_t
*diffstat
= priv
;
733 struct diffstat_file
*x
= diffstat
->files
[diffstat
->nr
- 1];
737 else if (line
[0] == '-')
741 const char mime_boundary_leader
[] = "------------";
743 static int scale_linear(int it
, int width
, int max_change
)
746 * make sure that at least one '-' is printed if there were deletions,
747 * and likewise for '+'.
751 return ((it
- 1) * (width
- 1) + max_change
- 1) / (max_change
- 1);
754 static void show_name(const char *prefix
, const char *name
, int len
,
755 const char *reset
, const char *set
)
757 printf(" %s%s%-*s%s |", set
, prefix
, len
, name
, reset
);
760 static void show_graph(char ch
, int cnt
, const char *set
, const char *reset
)
770 static void show_stats(struct diffstat_t
* data
, struct diff_options
*options
)
772 int i
, len
, add
, del
, total
, adds
= 0, dels
= 0;
773 int max_change
= 0, max_len
= 0;
774 int total_files
= data
->nr
;
775 int width
, name_width
;
776 const char *reset
, *set
, *add_c
, *del_c
;
781 width
= options
->stat_width
? options
->stat_width
: 80;
782 name_width
= options
->stat_name_width
? options
->stat_name_width
: 50;
784 /* Sanity: give at least 5 columns to the graph,
785 * but leave at least 10 columns for the name.
787 if (width
< name_width
+ 15) {
788 if (name_width
<= 25)
789 width
= name_width
+ 15;
791 name_width
= width
- 15;
794 /* Find the longest filename and max number of changes */
795 reset
= diff_get_color(options
->color_diff
, DIFF_RESET
);
796 set
= diff_get_color(options
->color_diff
, DIFF_PLAIN
);
797 add_c
= diff_get_color(options
->color_diff
, DIFF_FILE_NEW
);
798 del_c
= diff_get_color(options
->color_diff
, DIFF_FILE_OLD
);
800 for (i
= 0; i
< data
->nr
; i
++) {
801 struct diffstat_file
*file
= data
->files
[i
];
802 int change
= file
->added
+ file
->deleted
;
804 if (!file
->is_renamed
) { /* renames are already quoted by pprint_rename */
805 len
= quote_c_style(file
->name
, NULL
, NULL
, 0);
807 char *qname
= xmalloc(len
+ 1);
808 quote_c_style(file
->name
, qname
, NULL
, 0);
814 len
= strlen(file
->name
);
818 if (file
->is_binary
|| file
->is_unmerged
)
820 if (max_change
< change
)
824 /* Compute the width of the graph part;
825 * 10 is for one blank at the beginning of the line plus
826 * " | count " between the name and the graph.
828 * From here on, name_width is the width of the name area,
829 * and width is the width of the graph area.
831 name_width
= (name_width
< max_len
) ? name_width
: max_len
;
832 if (width
< (name_width
+ 10) + max_change
)
833 width
= width
- (name_width
+ 10);
837 for (i
= 0; i
< data
->nr
; i
++) {
838 const char *prefix
= "";
839 char *name
= data
->files
[i
]->name
;
840 int added
= data
->files
[i
]->added
;
841 int deleted
= data
->files
[i
]->deleted
;
845 * "scale" the filename
848 name_len
= strlen(name
);
849 if (name_width
< name_len
) {
853 name
+= name_len
- len
;
854 slash
= strchr(name
, '/');
859 if (data
->files
[i
]->is_binary
) {
860 show_name(prefix
, name
, len
, reset
, set
);
862 printf("%s%d%s", del_c
, deleted
, reset
);
864 printf("%s%d%s", add_c
, added
, reset
);
867 goto free_diffstat_file
;
869 else if (data
->files
[i
]->is_unmerged
) {
870 show_name(prefix
, name
, len
, reset
, set
);
871 printf(" Unmerged\n");
872 goto free_diffstat_file
;
874 else if (!data
->files
[i
]->is_renamed
&&
875 (added
+ deleted
== 0)) {
877 goto free_diffstat_file
;
881 * scale the add/delete
889 if (width
<= max_change
) {
890 add
= scale_linear(add
, width
, max_change
);
891 del
= scale_linear(del
, width
, max_change
);
894 show_name(prefix
, name
, len
, reset
, set
);
895 printf("%5d ", added
+ deleted
);
896 show_graph('+', add
, add_c
, reset
);
897 show_graph('-', del
, del_c
, reset
);
900 free(data
->files
[i
]->name
);
901 free(data
->files
[i
]);
904 printf("%s %d files changed, %d insertions(+), %d deletions(-)%s\n",
905 set
, total_files
, adds
, dels
, reset
);
908 static void show_shortstats(struct diffstat_t
* data
)
910 int i
, adds
= 0, dels
= 0, total_files
= data
->nr
;
915 for (i
= 0; i
< data
->nr
; i
++) {
916 if (!data
->files
[i
]->is_binary
&&
917 !data
->files
[i
]->is_unmerged
) {
918 int added
= data
->files
[i
]->added
;
919 int deleted
= data
->files
[i
]->deleted
;
920 if (!data
->files
[i
]->is_renamed
&&
921 (added
+ deleted
== 0)) {
928 free(data
->files
[i
]->name
);
929 free(data
->files
[i
]);
933 printf(" %d files changed, %d insertions(+), %d deletions(-)\n",
934 total_files
, adds
, dels
);
937 static void show_numstat(struct diffstat_t
* data
, struct diff_options
*options
)
941 for (i
= 0; i
< data
->nr
; i
++) {
942 struct diffstat_file
*file
= data
->files
[i
];
947 printf("%d\t%d\t", file
->added
, file
->deleted
);
948 if (options
->line_termination
&& !file
->is_renamed
&&
949 quote_c_style(file
->name
, NULL
, NULL
, 0))
950 quote_c_style(file
->name
, NULL
, stdout
, 0);
952 fputs(file
->name
, stdout
);
953 putchar(options
->line_termination
);
958 struct xdiff_emit_state xm
;
959 const char *filename
;
960 int lineno
, color_diff
;
963 static void checkdiff_consume(void *priv
, char *line
, unsigned long len
)
965 struct checkdiff_t
*data
= priv
;
966 const char *ws
= diff_get_color(data
->color_diff
, DIFF_WHITESPACE
);
967 const char *reset
= diff_get_color(data
->color_diff
, DIFF_RESET
);
968 const char *set
= diff_get_color(data
->color_diff
, DIFF_FILE_NEW
);
970 if (line
[0] == '+') {
971 int i
, spaces
= 0, space_before_tab
= 0, white_space_at_end
= 0;
973 /* check space before tab */
974 for (i
= 1; i
< len
&& (line
[i
] == ' ' || line
[i
] == '\t'); i
++)
977 if (line
[i
- 1] == '\t' && spaces
)
978 space_before_tab
= 1;
980 /* check white space at line end */
981 if (line
[len
- 1] == '\n')
983 if (isspace(line
[len
- 1]))
984 white_space_at_end
= 1;
986 if (space_before_tab
|| white_space_at_end
) {
987 printf("%s:%d: %s", data
->filename
, data
->lineno
, ws
);
988 if (space_before_tab
) {
989 printf("space before tab");
990 if (white_space_at_end
)
993 if (white_space_at_end
)
994 printf("white space at end");
995 printf(":%s ", reset
);
996 emit_line_with_ws(1, set
, reset
, ws
, line
, len
);
1000 } else if (line
[0] == ' ')
1002 else if (line
[0] == '@') {
1003 char *plus
= strchr(line
, '+');
1005 data
->lineno
= strtol(plus
, NULL
, 10);
1007 die("invalid diff");
1011 static unsigned char *deflate_it(char *data
,
1013 unsigned long *result_size
)
1016 unsigned char *deflated
;
1019 memset(&stream
, 0, sizeof(stream
));
1020 deflateInit(&stream
, zlib_compression_level
);
1021 bound
= deflateBound(&stream
, size
);
1022 deflated
= xmalloc(bound
);
1023 stream
.next_out
= deflated
;
1024 stream
.avail_out
= bound
;
1026 stream
.next_in
= (unsigned char *)data
;
1027 stream
.avail_in
= size
;
1028 while (deflate(&stream
, Z_FINISH
) == Z_OK
)
1030 deflateEnd(&stream
);
1031 *result_size
= stream
.total_out
;
1035 static void emit_binary_diff_body(mmfile_t
*one
, mmfile_t
*two
)
1041 unsigned long orig_size
;
1042 unsigned long delta_size
;
1043 unsigned long deflate_size
;
1044 unsigned long data_size
;
1046 /* We could do deflated delta, or we could do just deflated two,
1047 * whichever is smaller.
1050 deflated
= deflate_it(two
->ptr
, two
->size
, &deflate_size
);
1051 if (one
->size
&& two
->size
) {
1052 delta
= diff_delta(one
->ptr
, one
->size
,
1053 two
->ptr
, two
->size
,
1054 &delta_size
, deflate_size
);
1056 void *to_free
= delta
;
1057 orig_size
= delta_size
;
1058 delta
= deflate_it(delta
, delta_size
, &delta_size
);
1063 if (delta
&& delta_size
< deflate_size
) {
1064 printf("delta %lu\n", orig_size
);
1067 data_size
= delta_size
;
1070 printf("literal %lu\n", two
->size
);
1073 data_size
= deflate_size
;
1076 /* emit data encoded in base85 */
1079 int bytes
= (52 < data_size
) ? 52 : data_size
;
1083 line
[0] = bytes
+ 'A' - 1;
1085 line
[0] = bytes
- 26 + 'a' - 1;
1086 encode_85(line
+ 1, cp
, bytes
);
1087 cp
= (char *) cp
+ bytes
;
1094 static void emit_binary_diff(mmfile_t
*one
, mmfile_t
*two
)
1096 printf("GIT binary patch\n");
1097 emit_binary_diff_body(one
, two
);
1098 emit_binary_diff_body(two
, one
);
1101 static void setup_diff_attr_check(struct git_attr_check
*check
)
1103 static struct git_attr
*attr_diff
;
1106 attr_diff
= git_attr("diff", 4);
1108 check
[0].attr
= attr_diff
;
1111 static void diff_filespec_check_attr(struct diff_filespec
*one
)
1113 struct git_attr_check attr_diff_check
[1];
1115 if (one
->checked_attr
)
1118 setup_diff_attr_check(attr_diff_check
);
1121 if (!git_checkattr(one
->path
, ARRAY_SIZE(attr_diff_check
), attr_diff_check
)) {
1125 value
= attr_diff_check
[0].value
;
1126 if (ATTR_TRUE(value
))
1128 else if (ATTR_FALSE(value
))
1132 if (!one
->data
&& DIFF_FILE_VALID(one
))
1133 diff_populate_filespec(one
, 0);
1136 one
->is_binary
= buffer_is_binary(one
->data
, one
->size
);
1140 int diff_filespec_is_binary(struct diff_filespec
*one
)
1142 diff_filespec_check_attr(one
);
1143 return one
->is_binary
;
1146 static void builtin_diff(const char *name_a
,
1148 struct diff_filespec
*one
,
1149 struct diff_filespec
*two
,
1150 const char *xfrm_msg
,
1151 struct diff_options
*o
,
1152 int complete_rewrite
)
1156 char *a_one
, *b_two
;
1157 const char *set
= diff_get_color(o
->color_diff
, DIFF_METAINFO
);
1158 const char *reset
= diff_get_color(o
->color_diff
, DIFF_RESET
);
1160 a_one
= quote_two("a/", name_a
+ (*name_a
== '/'));
1161 b_two
= quote_two("b/", name_b
+ (*name_b
== '/'));
1162 lbl
[0] = DIFF_FILE_VALID(one
) ? a_one
: "/dev/null";
1163 lbl
[1] = DIFF_FILE_VALID(two
) ? b_two
: "/dev/null";
1164 printf("%sdiff --git %s %s%s\n", set
, a_one
, b_two
, reset
);
1165 if (lbl
[0][0] == '/') {
1167 printf("%snew file mode %06o%s\n", set
, two
->mode
, reset
);
1168 if (xfrm_msg
&& xfrm_msg
[0])
1169 printf("%s%s%s\n", set
, xfrm_msg
, reset
);
1171 else if (lbl
[1][0] == '/') {
1172 printf("%sdeleted file mode %06o%s\n", set
, one
->mode
, reset
);
1173 if (xfrm_msg
&& xfrm_msg
[0])
1174 printf("%s%s%s\n", set
, xfrm_msg
, reset
);
1177 if (one
->mode
!= two
->mode
) {
1178 printf("%sold mode %06o%s\n", set
, one
->mode
, reset
);
1179 printf("%snew mode %06o%s\n", set
, two
->mode
, reset
);
1181 if (xfrm_msg
&& xfrm_msg
[0])
1182 printf("%s%s%s\n", set
, xfrm_msg
, reset
);
1184 * we do not run diff between different kind
1187 if ((one
->mode
^ two
->mode
) & S_IFMT
)
1188 goto free_ab_and_return
;
1189 if (complete_rewrite
) {
1190 emit_rewrite_diff(name_a
, name_b
, one
, two
,
1192 o
->found_changes
= 1;
1193 goto free_ab_and_return
;
1197 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
1198 die("unable to read files to diff");
1201 (diff_filespec_is_binary(one
) || diff_filespec_is_binary(two
))) {
1202 /* Quite common confusing case */
1203 if (mf1
.size
== mf2
.size
&&
1204 !memcmp(mf1
.ptr
, mf2
.ptr
, mf1
.size
))
1205 goto free_ab_and_return
;
1207 emit_binary_diff(&mf1
, &mf2
);
1209 printf("Binary files %s and %s differ\n",
1211 o
->found_changes
= 1;
1214 /* Crazy xdl interfaces.. */
1215 const char *diffopts
= getenv("GIT_DIFF_OPTS");
1219 struct emit_callback ecbdata
;
1221 memset(&xecfg
, 0, sizeof(xecfg
));
1222 memset(&ecbdata
, 0, sizeof(ecbdata
));
1223 ecbdata
.label_path
= lbl
;
1224 ecbdata
.color_diff
= o
->color_diff
;
1225 ecbdata
.found_changesp
= &o
->found_changes
;
1226 xpp
.flags
= XDF_NEED_MINIMAL
| o
->xdl_opts
;
1227 xecfg
.ctxlen
= o
->context
;
1228 xecfg
.flags
= XDL_EMIT_FUNCNAMES
;
1231 else if (!prefixcmp(diffopts
, "--unified="))
1232 xecfg
.ctxlen
= strtoul(diffopts
+ 10, NULL
, 10);
1233 else if (!prefixcmp(diffopts
, "-u"))
1234 xecfg
.ctxlen
= strtoul(diffopts
+ 2, NULL
, 10);
1235 ecb
.outf
= xdiff_outf
;
1236 ecb
.priv
= &ecbdata
;
1237 ecbdata
.xm
.consume
= fn_out_consume
;
1238 if (o
->color_diff_words
)
1239 ecbdata
.diff_words
=
1240 xcalloc(1, sizeof(struct diff_words_data
));
1241 xdl_diff(&mf1
, &mf2
, &xpp
, &xecfg
, &ecb
);
1242 if (o
->color_diff_words
)
1243 free_diff_words_data(&ecbdata
);
1247 diff_free_filespec_data(one
);
1248 diff_free_filespec_data(two
);
1254 static void builtin_diffstat(const char *name_a
, const char *name_b
,
1255 struct diff_filespec
*one
,
1256 struct diff_filespec
*two
,
1257 struct diffstat_t
*diffstat
,
1258 struct diff_options
*o
,
1259 int complete_rewrite
)
1262 struct diffstat_file
*data
;
1264 data
= diffstat_add(diffstat
, name_a
, name_b
);
1267 data
->is_unmerged
= 1;
1270 if (complete_rewrite
) {
1271 diff_populate_filespec(one
, 0);
1272 diff_populate_filespec(two
, 0);
1273 data
->deleted
= count_lines(one
->data
, one
->size
);
1274 data
->added
= count_lines(two
->data
, two
->size
);
1275 goto free_and_return
;
1277 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
1278 die("unable to read files to diff");
1280 if (diff_filespec_is_binary(one
) || diff_filespec_is_binary(two
)) {
1281 data
->is_binary
= 1;
1282 data
->added
= mf2
.size
;
1283 data
->deleted
= mf1
.size
;
1285 /* Crazy xdl interfaces.. */
1290 memset(&xecfg
, 0, sizeof(xecfg
));
1291 xpp
.flags
= XDF_NEED_MINIMAL
| o
->xdl_opts
;
1292 ecb
.outf
= xdiff_outf
;
1293 ecb
.priv
= diffstat
;
1294 xdl_diff(&mf1
, &mf2
, &xpp
, &xecfg
, &ecb
);
1298 diff_free_filespec_data(one
);
1299 diff_free_filespec_data(two
);
1302 static void builtin_checkdiff(const char *name_a
, const char *name_b
,
1303 struct diff_filespec
*one
,
1304 struct diff_filespec
*two
, struct diff_options
*o
)
1307 struct checkdiff_t data
;
1312 memset(&data
, 0, sizeof(data
));
1313 data
.xm
.consume
= checkdiff_consume
;
1314 data
.filename
= name_b
? name_b
: name_a
;
1316 data
.color_diff
= o
->color_diff
;
1318 if (fill_mmfile(&mf1
, one
) < 0 || fill_mmfile(&mf2
, two
) < 0)
1319 die("unable to read files to diff");
1321 if (diff_filespec_is_binary(two
))
1322 goto free_and_return
;
1324 /* Crazy xdl interfaces.. */
1329 memset(&xecfg
, 0, sizeof(xecfg
));
1330 xpp
.flags
= XDF_NEED_MINIMAL
;
1331 ecb
.outf
= xdiff_outf
;
1333 xdl_diff(&mf1
, &mf2
, &xpp
, &xecfg
, &ecb
);
1336 diff_free_filespec_data(one
);
1337 diff_free_filespec_data(two
);
1340 struct diff_filespec
*alloc_filespec(const char *path
)
1342 int namelen
= strlen(path
);
1343 struct diff_filespec
*spec
= xmalloc(sizeof(*spec
) + namelen
+ 1);
1345 memset(spec
, 0, sizeof(*spec
));
1346 spec
->path
= (char *)(spec
+ 1);
1347 memcpy(spec
->path
, path
, namelen
+1);
1351 void fill_filespec(struct diff_filespec
*spec
, const unsigned char *sha1
,
1352 unsigned short mode
)
1355 spec
->mode
= canon_mode(mode
);
1356 hashcpy(spec
->sha1
, sha1
);
1357 spec
->sha1_valid
= !is_null_sha1(sha1
);
1362 * Given a name and sha1 pair, if the index tells us the file in
1363 * the work tree has that object contents, return true, so that
1364 * prepare_temp_file() does not have to inflate and extract.
1366 static int reuse_worktree_file(const char *name
, const unsigned char *sha1
, int want_file
)
1368 struct cache_entry
*ce
;
1372 /* We do not read the cache ourselves here, because the
1373 * benchmark with my previous version that always reads cache
1374 * shows that it makes things worse for diff-tree comparing
1375 * two linux-2.6 kernel trees in an already checked out work
1376 * tree. This is because most diff-tree comparisons deal with
1377 * only a small number of files, while reading the cache is
1378 * expensive for a large project, and its cost outweighs the
1379 * savings we get by not inflating the object to a temporary
1380 * file. Practically, this code only helps when we are used
1381 * by diff-cache --cached, which does read the cache before
1387 /* We want to avoid the working directory if our caller
1388 * doesn't need the data in a normal file, this system
1389 * is rather slow with its stat/open/mmap/close syscalls,
1390 * and the object is contained in a pack file. The pack
1391 * is probably already open and will be faster to obtain
1392 * the data through than the working directory. Loose
1393 * objects however would tend to be slower as they need
1394 * to be individually opened and inflated.
1396 if (!FAST_WORKING_DIRECTORY
&& !want_file
&& has_sha1_pack(sha1
, NULL
))
1400 pos
= cache_name_pos(name
, len
);
1403 ce
= active_cache
[pos
];
1404 if ((lstat(name
, &st
) < 0) ||
1405 !S_ISREG(st
.st_mode
) || /* careful! */
1406 ce_match_stat(ce
, &st
, 0) ||
1407 hashcmp(sha1
, ce
->sha1
))
1409 /* we return 1 only when we can stat, it is a regular file,
1410 * stat information matches, and sha1 recorded in the cache
1411 * matches. I.e. we know the file in the work tree really is
1412 * the same as the <name, sha1> pair.
1417 static int populate_from_stdin(struct diff_filespec
*s
)
1419 #define INCREMENT 1024
1427 buf
= xrealloc(buf
, size
+ INCREMENT
);
1428 got
= xread(0, buf
+ size
, INCREMENT
);
1432 return error("error while reading from stdin %s",
1436 s
->should_munmap
= 0;
1443 static int diff_populate_gitlink(struct diff_filespec
*s
, int size_only
)
1446 char *data
= xmalloc(100);
1447 len
= snprintf(data
, 100,
1448 "Subproject commit %s\n", sha1_to_hex(s
->sha1
));
1460 * While doing rename detection and pickaxe operation, we may need to
1461 * grab the data for the blob (or file) for our own in-core comparison.
1462 * diff_filespec has data and size fields for this purpose.
1464 int diff_populate_filespec(struct diff_filespec
*s
, int size_only
)
1467 if (!DIFF_FILE_VALID(s
))
1468 die("internal error: asking to populate invalid file.");
1469 if (S_ISDIR(s
->mode
))
1475 if (size_only
&& 0 < s
->size
)
1478 if (S_ISGITLINK(s
->mode
))
1479 return diff_populate_gitlink(s
, size_only
);
1481 if (!s
->sha1_valid
||
1482 reuse_worktree_file(s
->path
, s
->sha1
, 0)) {
1488 if (!strcmp(s
->path
, "-"))
1489 return populate_from_stdin(s
);
1491 if (lstat(s
->path
, &st
) < 0) {
1492 if (errno
== ENOENT
) {
1496 s
->data
= (char *)"";
1501 s
->size
= xsize_t(st
.st_size
);
1506 if (S_ISLNK(st
.st_mode
)) {
1508 s
->data
= xmalloc(s
->size
);
1510 ret
= readlink(s
->path
, s
->data
, s
->size
);
1517 fd
= open(s
->path
, O_RDONLY
);
1520 s
->data
= xmmap(NULL
, s
->size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
1522 s
->should_munmap
= 1;
1525 * Convert from working tree format to canonical git format
1528 buf
= convert_to_git(s
->path
, s
->data
, &size
);
1530 munmap(s
->data
, s
->size
);
1531 s
->should_munmap
= 0;
1538 enum object_type type
;
1540 type
= sha1_object_info(s
->sha1
, &s
->size
);
1542 s
->data
= read_sha1_file(s
->sha1
, &type
, &s
->size
);
1549 void diff_free_filespec_data(struct diff_filespec
*s
)
1553 else if (s
->should_munmap
)
1554 munmap(s
->data
, s
->size
);
1556 if (s
->should_free
|| s
->should_munmap
) {
1557 s
->should_free
= s
->should_munmap
= 0;
1564 static void prep_temp_blob(struct diff_tempfile
*temp
,
1567 const unsigned char *sha1
,
1572 fd
= git_mkstemp(temp
->tmp_path
, PATH_MAX
, ".diff_XXXXXX");
1574 die("unable to create temp-file");
1575 if (write_in_full(fd
, blob
, size
) != size
)
1576 die("unable to write temp-file");
1578 temp
->name
= temp
->tmp_path
;
1579 strcpy(temp
->hex
, sha1_to_hex(sha1
));
1581 sprintf(temp
->mode
, "%06o", mode
);
1584 static void prepare_temp_file(const char *name
,
1585 struct diff_tempfile
*temp
,
1586 struct diff_filespec
*one
)
1588 if (!DIFF_FILE_VALID(one
)) {
1590 /* A '-' entry produces this for file-2, and
1591 * a '+' entry produces this for file-1.
1593 temp
->name
= "/dev/null";
1594 strcpy(temp
->hex
, ".");
1595 strcpy(temp
->mode
, ".");
1599 if (!one
->sha1_valid
||
1600 reuse_worktree_file(name
, one
->sha1
, 1)) {
1602 if (lstat(name
, &st
) < 0) {
1603 if (errno
== ENOENT
)
1604 goto not_a_valid_file
;
1605 die("stat(%s): %s", name
, strerror(errno
));
1607 if (S_ISLNK(st
.st_mode
)) {
1609 char buf
[PATH_MAX
+ 1]; /* ought to be SYMLINK_MAX */
1610 size_t sz
= xsize_t(st
.st_size
);
1611 if (sizeof(buf
) <= st
.st_size
)
1612 die("symlink too long: %s", name
);
1613 ret
= readlink(name
, buf
, sz
);
1615 die("readlink(%s)", name
);
1616 prep_temp_blob(temp
, buf
, sz
,
1618 one
->sha1
: null_sha1
),
1620 one
->mode
: S_IFLNK
));
1623 /* we can borrow from the file in the work tree */
1625 if (!one
->sha1_valid
)
1626 strcpy(temp
->hex
, sha1_to_hex(null_sha1
));
1628 strcpy(temp
->hex
, sha1_to_hex(one
->sha1
));
1629 /* Even though we may sometimes borrow the
1630 * contents from the work tree, we always want
1631 * one->mode. mode is trustworthy even when
1632 * !(one->sha1_valid), as long as
1633 * DIFF_FILE_VALID(one).
1635 sprintf(temp
->mode
, "%06o", one
->mode
);
1640 if (diff_populate_filespec(one
, 0))
1641 die("cannot read data blob for %s", one
->path
);
1642 prep_temp_blob(temp
, one
->data
, one
->size
,
1643 one
->sha1
, one
->mode
);
1647 static void remove_tempfile(void)
1651 for (i
= 0; i
< 2; i
++)
1652 if (diff_temp
[i
].name
== diff_temp
[i
].tmp_path
) {
1653 unlink(diff_temp
[i
].name
);
1654 diff_temp
[i
].name
= NULL
;
1658 static void remove_tempfile_on_signal(int signo
)
1661 signal(SIGINT
, SIG_DFL
);
1665 static int spawn_prog(const char *pgm
, const char **arg
)
1673 die("unable to fork");
1675 execvp(pgm
, (char *const*) arg
);
1679 while (waitpid(pid
, &status
, 0) < 0) {
1685 /* Earlier we did not check the exit status because
1686 * diff exits non-zero if files are different, and
1687 * we are not interested in knowing that. It was a
1688 * mistake which made it harder to quit a diff-*
1689 * session that uses the git-apply-patch-script as
1690 * the GIT_EXTERNAL_DIFF. A custom GIT_EXTERNAL_DIFF
1691 * should also exit non-zero only when it wants to
1692 * abort the entire diff-* session.
1694 if (WIFEXITED(status
) && !WEXITSTATUS(status
))
1699 /* An external diff command takes:
1701 * diff-cmd name infile1 infile1-sha1 infile1-mode \
1702 * infile2 infile2-sha1 infile2-mode [ rename-to ]
1705 static void run_external_diff(const char *pgm
,
1708 struct diff_filespec
*one
,
1709 struct diff_filespec
*two
,
1710 const char *xfrm_msg
,
1711 int complete_rewrite
)
1713 const char *spawn_arg
[10];
1714 struct diff_tempfile
*temp
= diff_temp
;
1716 static int atexit_asked
= 0;
1717 const char *othername
;
1718 const char **arg
= &spawn_arg
[0];
1720 othername
= (other
? other
: name
);
1722 prepare_temp_file(name
, &temp
[0], one
);
1723 prepare_temp_file(othername
, &temp
[1], two
);
1724 if (! atexit_asked
&&
1725 (temp
[0].name
== temp
[0].tmp_path
||
1726 temp
[1].name
== temp
[1].tmp_path
)) {
1728 atexit(remove_tempfile
);
1730 signal(SIGINT
, remove_tempfile_on_signal
);
1736 *arg
++ = temp
[0].name
;
1737 *arg
++ = temp
[0].hex
;
1738 *arg
++ = temp
[0].mode
;
1739 *arg
++ = temp
[1].name
;
1740 *arg
++ = temp
[1].hex
;
1741 *arg
++ = temp
[1].mode
;
1751 retval
= spawn_prog(pgm
, spawn_arg
);
1754 fprintf(stderr
, "external diff died, stopping at %s.\n", name
);
1759 static const char *external_diff_attr(const char *name
)
1761 struct git_attr_check attr_diff_check
;
1763 setup_diff_attr_check(&attr_diff_check
);
1764 if (!git_checkattr(name
, 1, &attr_diff_check
)) {
1765 const char *value
= attr_diff_check
.value
;
1766 if (!ATTR_TRUE(value
) &&
1767 !ATTR_FALSE(value
) &&
1768 !ATTR_UNSET(value
)) {
1769 struct ll_diff_driver
*drv
;
1771 if (!user_diff_tail
) {
1772 user_diff_tail
= &user_diff
;
1773 git_config(git_diff_ui_config
);
1775 for (drv
= user_diff
; drv
; drv
= drv
->next
)
1776 if (!strcmp(drv
->name
, value
))
1783 static void run_diff_cmd(const char *pgm
,
1786 struct diff_filespec
*one
,
1787 struct diff_filespec
*two
,
1788 const char *xfrm_msg
,
1789 struct diff_options
*o
,
1790 int complete_rewrite
)
1792 if (!o
->allow_external
)
1795 const char *cmd
= external_diff_attr(name
);
1801 run_external_diff(pgm
, name
, other
, one
, two
, xfrm_msg
,
1806 builtin_diff(name
, other
? other
: name
,
1807 one
, two
, xfrm_msg
, o
, complete_rewrite
);
1809 printf("* Unmerged path %s\n", name
);
1812 static void diff_fill_sha1_info(struct diff_filespec
*one
)
1814 if (DIFF_FILE_VALID(one
)) {
1815 if (!one
->sha1_valid
) {
1817 if (!strcmp(one
->path
, "-")) {
1818 hashcpy(one
->sha1
, null_sha1
);
1821 if (lstat(one
->path
, &st
) < 0)
1822 die("stat %s", one
->path
);
1823 if (index_path(one
->sha1
, one
->path
, &st
, 0))
1824 die("cannot hash %s\n", one
->path
);
1831 static int similarity_index(struct diff_filepair
*p
)
1833 return p
->score
* 100 / MAX_SCORE
;
1836 static void run_diff(struct diff_filepair
*p
, struct diff_options
*o
)
1838 const char *pgm
= external_diff();
1839 char msg
[PATH_MAX
*2+300], *xfrm_msg
;
1840 struct diff_filespec
*one
;
1841 struct diff_filespec
*two
;
1844 char *name_munged
, *other_munged
;
1845 int complete_rewrite
= 0;
1848 if (DIFF_PAIR_UNMERGED(p
)) {
1850 run_diff_cmd(pgm
, p
->one
->path
, NULL
, NULL
, NULL
, NULL
, o
, 0);
1854 name
= p
->one
->path
;
1855 other
= (strcmp(name
, p
->two
->path
) ? p
->two
->path
: NULL
);
1856 name_munged
= quote_one(name
);
1857 other_munged
= quote_one(other
);
1858 one
= p
->one
; two
= p
->two
;
1860 diff_fill_sha1_info(one
);
1861 diff_fill_sha1_info(two
);
1864 switch (p
->status
) {
1865 case DIFF_STATUS_COPIED
:
1866 len
+= snprintf(msg
+ len
, sizeof(msg
) - len
,
1867 "similarity index %d%%\n"
1870 similarity_index(p
), name_munged
, other_munged
);
1872 case DIFF_STATUS_RENAMED
:
1873 len
+= snprintf(msg
+ len
, sizeof(msg
) - len
,
1874 "similarity index %d%%\n"
1877 similarity_index(p
), name_munged
, other_munged
);
1879 case DIFF_STATUS_MODIFIED
:
1881 len
+= snprintf(msg
+ len
, sizeof(msg
) - len
,
1882 "dissimilarity index %d%%\n",
1883 similarity_index(p
));
1884 complete_rewrite
= 1;
1893 if (hashcmp(one
->sha1
, two
->sha1
)) {
1894 int abbrev
= o
->full_index
? 40 : DEFAULT_ABBREV
;
1898 if ((!fill_mmfile(&mf
, one
) && diff_filespec_is_binary(one
)) ||
1899 (!fill_mmfile(&mf
, two
) && diff_filespec_is_binary(two
)))
1902 len
+= snprintf(msg
+ len
, sizeof(msg
) - len
,
1904 abbrev
, sha1_to_hex(one
->sha1
),
1905 abbrev
, sha1_to_hex(two
->sha1
));
1906 if (one
->mode
== two
->mode
)
1907 len
+= snprintf(msg
+ len
, sizeof(msg
) - len
,
1908 " %06o", one
->mode
);
1909 len
+= snprintf(msg
+ len
, sizeof(msg
) - len
, "\n");
1914 xfrm_msg
= len
? msg
: NULL
;
1917 DIFF_FILE_VALID(one
) && DIFF_FILE_VALID(two
) &&
1918 (S_IFMT
& one
->mode
) != (S_IFMT
& two
->mode
)) {
1919 /* a filepair that changes between file and symlink
1920 * needs to be split into deletion and creation.
1922 struct diff_filespec
*null
= alloc_filespec(two
->path
);
1923 run_diff_cmd(NULL
, name
, other
, one
, null
, xfrm_msg
, o
, 0);
1925 null
= alloc_filespec(one
->path
);
1926 run_diff_cmd(NULL
, name
, other
, null
, two
, xfrm_msg
, o
, 0);
1930 run_diff_cmd(pgm
, name
, other
, one
, two
, xfrm_msg
, o
,
1937 static void run_diffstat(struct diff_filepair
*p
, struct diff_options
*o
,
1938 struct diffstat_t
*diffstat
)
1942 int complete_rewrite
= 0;
1944 if (DIFF_PAIR_UNMERGED(p
)) {
1946 builtin_diffstat(p
->one
->path
, NULL
, NULL
, NULL
, diffstat
, o
, 0);
1950 name
= p
->one
->path
;
1951 other
= (strcmp(name
, p
->two
->path
) ? p
->two
->path
: NULL
);
1953 diff_fill_sha1_info(p
->one
);
1954 diff_fill_sha1_info(p
->two
);
1956 if (p
->status
== DIFF_STATUS_MODIFIED
&& p
->score
)
1957 complete_rewrite
= 1;
1958 builtin_diffstat(name
, other
, p
->one
, p
->two
, diffstat
, o
, complete_rewrite
);
1961 static void run_checkdiff(struct diff_filepair
*p
, struct diff_options
*o
)
1966 if (DIFF_PAIR_UNMERGED(p
)) {
1971 name
= p
->one
->path
;
1972 other
= (strcmp(name
, p
->two
->path
) ? p
->two
->path
: NULL
);
1974 diff_fill_sha1_info(p
->one
);
1975 diff_fill_sha1_info(p
->two
);
1977 builtin_checkdiff(name
, other
, p
->one
, p
->two
, o
);
1980 void diff_setup(struct diff_options
*options
)
1982 memset(options
, 0, sizeof(*options
));
1983 options
->line_termination
= '\n';
1984 options
->break_opt
= -1;
1985 options
->rename_limit
= -1;
1986 options
->context
= 3;
1987 options
->msg_sep
= "";
1989 options
->change
= diff_change
;
1990 options
->add_remove
= diff_addremove
;
1991 options
->color_diff
= diff_use_color_default
;
1992 options
->detect_rename
= diff_detect_rename_default
;
1995 int diff_setup_done(struct diff_options
*options
)
1999 if (options
->output_format
& DIFF_FORMAT_NAME
)
2001 if (options
->output_format
& DIFF_FORMAT_NAME_STATUS
)
2003 if (options
->output_format
& DIFF_FORMAT_CHECKDIFF
)
2005 if (options
->output_format
& DIFF_FORMAT_NO_OUTPUT
)
2008 die("--name-only, --name-status, --check and -s are mutually exclusive");
2010 if (options
->find_copies_harder
)
2011 options
->detect_rename
= DIFF_DETECT_COPY
;
2013 if (options
->output_format
& (DIFF_FORMAT_NAME
|
2014 DIFF_FORMAT_NAME_STATUS
|
2015 DIFF_FORMAT_CHECKDIFF
|
2016 DIFF_FORMAT_NO_OUTPUT
))
2017 options
->output_format
&= ~(DIFF_FORMAT_RAW
|
2018 DIFF_FORMAT_NUMSTAT
|
2019 DIFF_FORMAT_DIFFSTAT
|
2020 DIFF_FORMAT_SHORTSTAT
|
2021 DIFF_FORMAT_SUMMARY
|
2025 * These cases always need recursive; we do not drop caller-supplied
2026 * recursive bits for other formats here.
2028 if (options
->output_format
& (DIFF_FORMAT_PATCH
|
2029 DIFF_FORMAT_NUMSTAT
|
2030 DIFF_FORMAT_DIFFSTAT
|
2031 DIFF_FORMAT_SHORTSTAT
|
2032 DIFF_FORMAT_SUMMARY
|
2033 DIFF_FORMAT_CHECKDIFF
))
2034 options
->recursive
= 1;
2036 * Also pickaxe would not work very well if you do not say recursive
2038 if (options
->pickaxe
)
2039 options
->recursive
= 1;
2041 if (options
->detect_rename
&& options
->rename_limit
< 0)
2042 options
->rename_limit
= diff_rename_limit_default
;
2043 if (options
->setup
& DIFF_SETUP_USE_CACHE
) {
2045 /* read-cache does not die even when it fails
2046 * so it is safe for us to do this here. Also
2047 * it does not smudge active_cache or active_nr
2048 * when it fails, so we do not have to worry about
2049 * cleaning it up ourselves either.
2053 if (options
->abbrev
<= 0 || 40 < options
->abbrev
)
2054 options
->abbrev
= 40; /* full */
2057 * It does not make sense to show the first hit we happened
2058 * to have found. It does not make sense not to return with
2059 * exit code in such a case either.
2061 if (options
->quiet
) {
2062 options
->output_format
= DIFF_FORMAT_NO_OUTPUT
;
2063 options
->exit_with_status
= 1;
2067 * If we postprocess in diffcore, we cannot simply return
2068 * upon the first hit. We need to run diff as usual.
2070 if (options
->pickaxe
|| options
->filter
)
2076 static int opt_arg(const char *arg
, int arg_short
, const char *arg_long
, int *val
)
2086 if (c
== arg_short
) {
2090 if (val
&& isdigit(c
)) {
2092 int n
= strtoul(arg
, &end
, 10);
2103 eq
= strchr(arg
, '=');
2108 if (!len
|| strncmp(arg
, arg_long
, len
))
2113 if (!isdigit(*++eq
))
2115 n
= strtoul(eq
, &end
, 10);
2123 static int diff_scoreopt_parse(const char *opt
);
2125 int diff_opt_parse(struct diff_options
*options
, const char **av
, int ac
)
2127 const char *arg
= av
[0];
2128 if (!strcmp(arg
, "-p") || !strcmp(arg
, "-u"))
2129 options
->output_format
|= DIFF_FORMAT_PATCH
;
2130 else if (opt_arg(arg
, 'U', "unified", &options
->context
))
2131 options
->output_format
|= DIFF_FORMAT_PATCH
;
2132 else if (!strcmp(arg
, "--raw"))
2133 options
->output_format
|= DIFF_FORMAT_RAW
;
2134 else if (!strcmp(arg
, "--patch-with-raw")) {
2135 options
->output_format
|= DIFF_FORMAT_PATCH
| DIFF_FORMAT_RAW
;
2137 else if (!strcmp(arg
, "--numstat")) {
2138 options
->output_format
|= DIFF_FORMAT_NUMSTAT
;
2140 else if (!strcmp(arg
, "--shortstat")) {
2141 options
->output_format
|= DIFF_FORMAT_SHORTSTAT
;
2143 else if (!prefixcmp(arg
, "--stat")) {
2145 int width
= options
->stat_width
;
2146 int name_width
= options
->stat_name_width
;
2152 if (!prefixcmp(arg
, "-width="))
2153 width
= strtoul(arg
+ 7, &end
, 10);
2154 else if (!prefixcmp(arg
, "-name-width="))
2155 name_width
= strtoul(arg
+ 12, &end
, 10);
2158 width
= strtoul(arg
+1, &end
, 10);
2160 name_width
= strtoul(end
+1, &end
, 10);
2163 /* Important! This checks all the error cases! */
2166 options
->output_format
|= DIFF_FORMAT_DIFFSTAT
;
2167 options
->stat_name_width
= name_width
;
2168 options
->stat_width
= width
;
2170 else if (!strcmp(arg
, "--check"))
2171 options
->output_format
|= DIFF_FORMAT_CHECKDIFF
;
2172 else if (!strcmp(arg
, "--summary"))
2173 options
->output_format
|= DIFF_FORMAT_SUMMARY
;
2174 else if (!strcmp(arg
, "--patch-with-stat")) {
2175 options
->output_format
|= DIFF_FORMAT_PATCH
| DIFF_FORMAT_DIFFSTAT
;
2177 else if (!strcmp(arg
, "-z"))
2178 options
->line_termination
= 0;
2179 else if (!prefixcmp(arg
, "-l"))
2180 options
->rename_limit
= strtoul(arg
+2, NULL
, 10);
2181 else if (!strcmp(arg
, "--full-index"))
2182 options
->full_index
= 1;
2183 else if (!strcmp(arg
, "--binary")) {
2184 options
->output_format
|= DIFF_FORMAT_PATCH
;
2185 options
->binary
= 1;
2187 else if (!strcmp(arg
, "-a") || !strcmp(arg
, "--text")) {
2190 else if (!strcmp(arg
, "--name-only"))
2191 options
->output_format
|= DIFF_FORMAT_NAME
;
2192 else if (!strcmp(arg
, "--name-status"))
2193 options
->output_format
|= DIFF_FORMAT_NAME_STATUS
;
2194 else if (!strcmp(arg
, "-R"))
2195 options
->reverse_diff
= 1;
2196 else if (!prefixcmp(arg
, "-S"))
2197 options
->pickaxe
= arg
+ 2;
2198 else if (!strcmp(arg
, "-s")) {
2199 options
->output_format
|= DIFF_FORMAT_NO_OUTPUT
;
2201 else if (!prefixcmp(arg
, "-O"))
2202 options
->orderfile
= arg
+ 2;
2203 else if (!prefixcmp(arg
, "--diff-filter="))
2204 options
->filter
= arg
+ 14;
2205 else if (!strcmp(arg
, "--pickaxe-all"))
2206 options
->pickaxe_opts
= DIFF_PICKAXE_ALL
;
2207 else if (!strcmp(arg
, "--pickaxe-regex"))
2208 options
->pickaxe_opts
= DIFF_PICKAXE_REGEX
;
2209 else if (!prefixcmp(arg
, "-B")) {
2210 if ((options
->break_opt
=
2211 diff_scoreopt_parse(arg
)) == -1)
2214 else if (!prefixcmp(arg
, "-M")) {
2215 if ((options
->rename_score
=
2216 diff_scoreopt_parse(arg
)) == -1)
2218 options
->detect_rename
= DIFF_DETECT_RENAME
;
2220 else if (!prefixcmp(arg
, "-C")) {
2221 if (options
->detect_rename
== DIFF_DETECT_COPY
)
2222 options
->find_copies_harder
= 1;
2223 if ((options
->rename_score
=
2224 diff_scoreopt_parse(arg
)) == -1)
2226 options
->detect_rename
= DIFF_DETECT_COPY
;
2228 else if (!strcmp(arg
, "--find-copies-harder"))
2229 options
->find_copies_harder
= 1;
2230 else if (!strcmp(arg
, "--follow"))
2231 options
->follow_renames
= 1;
2232 else if (!strcmp(arg
, "--abbrev"))
2233 options
->abbrev
= DEFAULT_ABBREV
;
2234 else if (!prefixcmp(arg
, "--abbrev=")) {
2235 options
->abbrev
= strtoul(arg
+ 9, NULL
, 10);
2236 if (options
->abbrev
< MINIMUM_ABBREV
)
2237 options
->abbrev
= MINIMUM_ABBREV
;
2238 else if (40 < options
->abbrev
)
2239 options
->abbrev
= 40;
2241 else if (!strcmp(arg
, "--color"))
2242 options
->color_diff
= 1;
2243 else if (!strcmp(arg
, "--no-color"))
2244 options
->color_diff
= 0;
2245 else if (!strcmp(arg
, "-w") || !strcmp(arg
, "--ignore-all-space"))
2246 options
->xdl_opts
|= XDF_IGNORE_WHITESPACE
;
2247 else if (!strcmp(arg
, "-b") || !strcmp(arg
, "--ignore-space-change"))
2248 options
->xdl_opts
|= XDF_IGNORE_WHITESPACE_CHANGE
;
2249 else if (!strcmp(arg
, "--ignore-space-at-eol"))
2250 options
->xdl_opts
|= XDF_IGNORE_WHITESPACE_AT_EOL
;
2251 else if (!strcmp(arg
, "--color-words"))
2252 options
->color_diff
= options
->color_diff_words
= 1;
2253 else if (!strcmp(arg
, "--no-renames"))
2254 options
->detect_rename
= 0;
2255 else if (!strcmp(arg
, "--exit-code"))
2256 options
->exit_with_status
= 1;
2257 else if (!strcmp(arg
, "--quiet"))
2259 else if (!strcmp(arg
, "--ext-diff"))
2260 options
->allow_external
= 1;
2261 else if (!strcmp(arg
, "--no-ext-diff"))
2262 options
->allow_external
= 0;
2268 static int parse_num(const char **cp_p
)
2270 unsigned long num
, scale
;
2272 const char *cp
= *cp_p
;
2279 if ( !dot
&& ch
== '.' ) {
2282 } else if ( ch
== '%' ) {
2283 scale
= dot
? scale
*100 : 100;
2284 cp
++; /* % is always at the end */
2286 } else if ( ch
>= '0' && ch
<= '9' ) {
2287 if ( scale
< 100000 ) {
2289 num
= (num
*10) + (ch
-'0');
2298 /* user says num divided by scale and we say internally that
2299 * is MAX_SCORE * num / scale.
2301 return (int)((num
>= scale
) ? MAX_SCORE
: (MAX_SCORE
* num
/ scale
));
2304 static int diff_scoreopt_parse(const char *opt
)
2306 int opt1
, opt2
, cmd
;
2311 if (cmd
!= 'M' && cmd
!= 'C' && cmd
!= 'B')
2312 return -1; /* that is not a -M, -C nor -B option */
2314 opt1
= parse_num(&opt
);
2320 else if (*opt
!= '/')
2321 return -1; /* we expect -B80/99 or -B80 */
2324 opt2
= parse_num(&opt
);
2329 return opt1
| (opt2
<< 16);
2332 struct diff_queue_struct diff_queued_diff
;
2334 void diff_q(struct diff_queue_struct
*queue
, struct diff_filepair
*dp
)
2336 if (queue
->alloc
<= queue
->nr
) {
2337 queue
->alloc
= alloc_nr(queue
->alloc
);
2338 queue
->queue
= xrealloc(queue
->queue
,
2339 sizeof(dp
) * queue
->alloc
);
2341 queue
->queue
[queue
->nr
++] = dp
;
2344 struct diff_filepair
*diff_queue(struct diff_queue_struct
*queue
,
2345 struct diff_filespec
*one
,
2346 struct diff_filespec
*two
)
2348 struct diff_filepair
*dp
= xcalloc(1, sizeof(*dp
));
2356 void diff_free_filepair(struct diff_filepair
*p
)
2358 diff_free_filespec_data(p
->one
);
2359 diff_free_filespec_data(p
->two
);
2365 /* This is different from find_unique_abbrev() in that
2366 * it stuffs the result with dots for alignment.
2368 const char *diff_unique_abbrev(const unsigned char *sha1
, int len
)
2373 return sha1_to_hex(sha1
);
2375 abbrev
= find_unique_abbrev(sha1
, len
);
2377 return sha1_to_hex(sha1
);
2378 abblen
= strlen(abbrev
);
2380 static char hex
[41];
2381 if (len
< abblen
&& abblen
<= len
+ 2)
2382 sprintf(hex
, "%s%.*s", abbrev
, len
+3-abblen
, "..");
2384 sprintf(hex
, "%s...", abbrev
);
2387 return sha1_to_hex(sha1
);
2390 static void diff_flush_raw(struct diff_filepair
*p
,
2391 struct diff_options
*options
)
2395 int abbrev
= options
->abbrev
;
2396 const char *path_one
, *path_two
;
2397 int inter_name_termination
= '\t';
2398 int line_termination
= options
->line_termination
;
2400 if (!line_termination
)
2401 inter_name_termination
= 0;
2403 path_one
= p
->one
->path
;
2404 path_two
= p
->two
->path
;
2405 if (line_termination
) {
2406 path_one
= quote_one(path_one
);
2407 path_two
= quote_one(path_two
);
2411 sprintf(status
, "%c%03d", p
->status
, similarity_index(p
));
2413 status
[0] = p
->status
;
2416 switch (p
->status
) {
2417 case DIFF_STATUS_COPIED
:
2418 case DIFF_STATUS_RENAMED
:
2421 case DIFF_STATUS_ADDED
:
2422 case DIFF_STATUS_DELETED
:
2429 if (!(options
->output_format
& DIFF_FORMAT_NAME_STATUS
)) {
2430 printf(":%06o %06o %s ",
2431 p
->one
->mode
, p
->two
->mode
,
2432 diff_unique_abbrev(p
->one
->sha1
, abbrev
));
2434 diff_unique_abbrev(p
->two
->sha1
, abbrev
));
2436 printf("%s%c%s", status
, inter_name_termination
,
2437 two_paths
|| p
->one
->mode
? path_one
: path_two
);
2439 printf("%c%s", inter_name_termination
, path_two
);
2440 putchar(line_termination
);
2441 if (path_one
!= p
->one
->path
)
2442 free((void*)path_one
);
2443 if (path_two
!= p
->two
->path
)
2444 free((void*)path_two
);
2447 static void diff_flush_name(struct diff_filepair
*p
, struct diff_options
*opt
)
2449 char *path
= p
->two
->path
;
2451 if (opt
->line_termination
)
2452 path
= quote_one(p
->two
->path
);
2453 printf("%s%c", path
, opt
->line_termination
);
2454 if (p
->two
->path
!= path
)
2458 int diff_unmodified_pair(struct diff_filepair
*p
)
2460 /* This function is written stricter than necessary to support
2461 * the currently implemented transformers, but the idea is to
2462 * let transformers to produce diff_filepairs any way they want,
2463 * and filter and clean them up here before producing the output.
2465 struct diff_filespec
*one
, *two
;
2467 if (DIFF_PAIR_UNMERGED(p
))
2468 return 0; /* unmerged is interesting */
2473 /* deletion, addition, mode or type change
2474 * and rename are all interesting.
2476 if (DIFF_FILE_VALID(one
) != DIFF_FILE_VALID(two
) ||
2477 DIFF_PAIR_MODE_CHANGED(p
) ||
2478 strcmp(one
->path
, two
->path
))
2481 /* both are valid and point at the same path. that is, we are
2482 * dealing with a change.
2484 if (one
->sha1_valid
&& two
->sha1_valid
&&
2485 !hashcmp(one
->sha1
, two
->sha1
))
2486 return 1; /* no change */
2487 if (!one
->sha1_valid
&& !two
->sha1_valid
)
2488 return 1; /* both look at the same file on the filesystem. */
2492 static void diff_flush_patch(struct diff_filepair
*p
, struct diff_options
*o
)
2494 if (diff_unmodified_pair(p
))
2497 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
2498 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
2499 return; /* no tree diffs in patch format */
2504 static void diff_flush_stat(struct diff_filepair
*p
, struct diff_options
*o
,
2505 struct diffstat_t
*diffstat
)
2507 if (diff_unmodified_pair(p
))
2510 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
2511 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
2512 return; /* no tree diffs in patch format */
2514 run_diffstat(p
, o
, diffstat
);
2517 static void diff_flush_checkdiff(struct diff_filepair
*p
,
2518 struct diff_options
*o
)
2520 if (diff_unmodified_pair(p
))
2523 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
2524 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
2525 return; /* no tree diffs in patch format */
2527 run_checkdiff(p
, o
);
2530 int diff_queue_is_empty(void)
2532 struct diff_queue_struct
*q
= &diff_queued_diff
;
2534 for (i
= 0; i
< q
->nr
; i
++)
2535 if (!diff_unmodified_pair(q
->queue
[i
]))
2541 void diff_debug_filespec(struct diff_filespec
*s
, int x
, const char *one
)
2543 fprintf(stderr
, "queue[%d] %s (%s) %s %06o %s\n",
2546 DIFF_FILE_VALID(s
) ? "valid" : "invalid",
2548 s
->sha1_valid
? sha1_to_hex(s
->sha1
) : "");
2549 fprintf(stderr
, "queue[%d] %s size %lu flags %d\n",
2551 s
->size
, s
->xfrm_flags
);
2554 void diff_debug_filepair(const struct diff_filepair
*p
, int i
)
2556 diff_debug_filespec(p
->one
, i
, "one");
2557 diff_debug_filespec(p
->two
, i
, "two");
2558 fprintf(stderr
, "score %d, status %c stays %d broken %d\n",
2559 p
->score
, p
->status
? p
->status
: '?',
2560 p
->source_stays
, p
->broken_pair
);
2563 void diff_debug_queue(const char *msg
, struct diff_queue_struct
*q
)
2567 fprintf(stderr
, "%s\n", msg
);
2568 fprintf(stderr
, "q->nr = %d\n", q
->nr
);
2569 for (i
= 0; i
< q
->nr
; i
++) {
2570 struct diff_filepair
*p
= q
->queue
[i
];
2571 diff_debug_filepair(p
, i
);
2576 static void diff_resolve_rename_copy(void)
2579 struct diff_filepair
*p
, *pp
;
2580 struct diff_queue_struct
*q
= &diff_queued_diff
;
2582 diff_debug_queue("resolve-rename-copy", q
);
2584 for (i
= 0; i
< q
->nr
; i
++) {
2586 p
->status
= 0; /* undecided */
2587 if (DIFF_PAIR_UNMERGED(p
))
2588 p
->status
= DIFF_STATUS_UNMERGED
;
2589 else if (!DIFF_FILE_VALID(p
->one
))
2590 p
->status
= DIFF_STATUS_ADDED
;
2591 else if (!DIFF_FILE_VALID(p
->two
))
2592 p
->status
= DIFF_STATUS_DELETED
;
2593 else if (DIFF_PAIR_TYPE_CHANGED(p
))
2594 p
->status
= DIFF_STATUS_TYPE_CHANGED
;
2596 /* from this point on, we are dealing with a pair
2597 * whose both sides are valid and of the same type, i.e.
2598 * either in-place edit or rename/copy edit.
2600 else if (DIFF_PAIR_RENAME(p
)) {
2601 if (p
->source_stays
) {
2602 p
->status
= DIFF_STATUS_COPIED
;
2605 /* See if there is some other filepair that
2606 * copies from the same source as us. If so
2607 * we are a copy. Otherwise we are either a
2608 * copy if the path stays, or a rename if it
2609 * does not, but we already handled "stays" case.
2611 for (j
= i
+ 1; j
< q
->nr
; j
++) {
2613 if (strcmp(pp
->one
->path
, p
->one
->path
))
2614 continue; /* not us */
2615 if (!DIFF_PAIR_RENAME(pp
))
2616 continue; /* not a rename/copy */
2617 /* pp is a rename/copy from the same source */
2618 p
->status
= DIFF_STATUS_COPIED
;
2622 p
->status
= DIFF_STATUS_RENAMED
;
2624 else if (hashcmp(p
->one
->sha1
, p
->two
->sha1
) ||
2625 p
->one
->mode
!= p
->two
->mode
||
2626 is_null_sha1(p
->one
->sha1
))
2627 p
->status
= DIFF_STATUS_MODIFIED
;
2629 /* This is a "no-change" entry and should not
2630 * happen anymore, but prepare for broken callers.
2632 error("feeding unmodified %s to diffcore",
2634 p
->status
= DIFF_STATUS_UNKNOWN
;
2637 diff_debug_queue("resolve-rename-copy done", q
);
2640 static int check_pair_status(struct diff_filepair
*p
)
2642 switch (p
->status
) {
2643 case DIFF_STATUS_UNKNOWN
:
2646 die("internal error in diff-resolve-rename-copy");
2652 static void flush_one_pair(struct diff_filepair
*p
, struct diff_options
*opt
)
2654 int fmt
= opt
->output_format
;
2656 if (fmt
& DIFF_FORMAT_CHECKDIFF
)
2657 diff_flush_checkdiff(p
, opt
);
2658 else if (fmt
& (DIFF_FORMAT_RAW
| DIFF_FORMAT_NAME_STATUS
))
2659 diff_flush_raw(p
, opt
);
2660 else if (fmt
& DIFF_FORMAT_NAME
)
2661 diff_flush_name(p
, opt
);
2664 static void show_file_mode_name(const char *newdelete
, struct diff_filespec
*fs
)
2666 char *name
= quote_one(fs
->path
);
2668 printf(" %s mode %06o %s\n", newdelete
, fs
->mode
, name
);
2670 printf(" %s %s\n", newdelete
, name
);
2675 static void show_mode_change(struct diff_filepair
*p
, int show_name
)
2677 if (p
->one
->mode
&& p
->two
->mode
&& p
->one
->mode
!= p
->two
->mode
) {
2679 char *name
= quote_one(p
->two
->path
);
2680 printf(" mode change %06o => %06o %s\n",
2681 p
->one
->mode
, p
->two
->mode
, name
);
2685 printf(" mode change %06o => %06o\n",
2686 p
->one
->mode
, p
->two
->mode
);
2690 static void show_rename_copy(const char *renamecopy
, struct diff_filepair
*p
)
2692 char *names
= pprint_rename(p
->one
->path
, p
->two
->path
);
2694 printf(" %s %s (%d%%)\n", renamecopy
, names
, similarity_index(p
));
2696 show_mode_change(p
, 0);
2699 static void diff_summary(struct diff_filepair
*p
)
2702 case DIFF_STATUS_DELETED
:
2703 show_file_mode_name("delete", p
->one
);
2705 case DIFF_STATUS_ADDED
:
2706 show_file_mode_name("create", p
->two
);
2708 case DIFF_STATUS_COPIED
:
2709 show_rename_copy("copy", p
);
2711 case DIFF_STATUS_RENAMED
:
2712 show_rename_copy("rename", p
);
2716 char *name
= quote_one(p
->two
->path
);
2717 printf(" rewrite %s (%d%%)\n", name
,
2718 similarity_index(p
));
2720 show_mode_change(p
, 0);
2721 } else show_mode_change(p
, 1);
2727 struct xdiff_emit_state xm
;
2732 static int remove_space(char *line
, int len
)
2738 for (i
= 0; i
< len
; i
++)
2739 if (!isspace((c
= line
[i
])))
2745 static void patch_id_consume(void *priv
, char *line
, unsigned long len
)
2747 struct patch_id_t
*data
= priv
;
2750 /* Ignore line numbers when computing the SHA1 of the patch */
2751 if (!prefixcmp(line
, "@@ -"))
2754 new_len
= remove_space(line
, len
);
2756 SHA1_Update(data
->ctx
, line
, new_len
);
2757 data
->patchlen
+= new_len
;
2760 /* returns 0 upon success, and writes result into sha1 */
2761 static int diff_get_patch_id(struct diff_options
*options
, unsigned char *sha1
)
2763 struct diff_queue_struct
*q
= &diff_queued_diff
;
2766 struct patch_id_t data
;
2767 char buffer
[PATH_MAX
* 4 + 20];
2770 memset(&data
, 0, sizeof(struct patch_id_t
));
2772 data
.xm
.consume
= patch_id_consume
;
2774 for (i
= 0; i
< q
->nr
; i
++) {
2779 struct diff_filepair
*p
= q
->queue
[i
];
2782 memset(&xecfg
, 0, sizeof(xecfg
));
2784 return error("internal diff status error");
2785 if (p
->status
== DIFF_STATUS_UNKNOWN
)
2787 if (diff_unmodified_pair(p
))
2789 if ((DIFF_FILE_VALID(p
->one
) && S_ISDIR(p
->one
->mode
)) ||
2790 (DIFF_FILE_VALID(p
->two
) && S_ISDIR(p
->two
->mode
)))
2792 if (DIFF_PAIR_UNMERGED(p
))
2795 diff_fill_sha1_info(p
->one
);
2796 diff_fill_sha1_info(p
->two
);
2797 if (fill_mmfile(&mf1
, p
->one
) < 0 ||
2798 fill_mmfile(&mf2
, p
->two
) < 0)
2799 return error("unable to read files to diff");
2801 /* Maybe hash p->two? into the patch id? */
2802 if (diff_filespec_is_binary(p
->two
))
2805 len1
= remove_space(p
->one
->path
, strlen(p
->one
->path
));
2806 len2
= remove_space(p
->two
->path
, strlen(p
->two
->path
));
2807 if (p
->one
->mode
== 0)
2808 len1
= snprintf(buffer
, sizeof(buffer
),
2809 "diff--gita/%.*sb/%.*s"
2816 len2
, p
->two
->path
);
2817 else if (p
->two
->mode
== 0)
2818 len1
= snprintf(buffer
, sizeof(buffer
),
2819 "diff--gita/%.*sb/%.*s"
2820 "deletedfilemode%06o"
2826 len1
, p
->one
->path
);
2828 len1
= snprintf(buffer
, sizeof(buffer
),
2829 "diff--gita/%.*sb/%.*s"
2835 len2
, p
->two
->path
);
2836 SHA1_Update(&ctx
, buffer
, len1
);
2838 xpp
.flags
= XDF_NEED_MINIMAL
;
2840 xecfg
.flags
= XDL_EMIT_FUNCNAMES
;
2841 ecb
.outf
= xdiff_outf
;
2843 xdl_diff(&mf1
, &mf2
, &xpp
, &xecfg
, &ecb
);
2846 SHA1_Final(sha1
, &ctx
);
2850 int diff_flush_patch_id(struct diff_options
*options
, unsigned char *sha1
)
2852 struct diff_queue_struct
*q
= &diff_queued_diff
;
2854 int result
= diff_get_patch_id(options
, sha1
);
2856 for (i
= 0; i
< q
->nr
; i
++)
2857 diff_free_filepair(q
->queue
[i
]);
2861 q
->nr
= q
->alloc
= 0;
2866 static int is_summary_empty(const struct diff_queue_struct
*q
)
2870 for (i
= 0; i
< q
->nr
; i
++) {
2871 const struct diff_filepair
*p
= q
->queue
[i
];
2873 switch (p
->status
) {
2874 case DIFF_STATUS_DELETED
:
2875 case DIFF_STATUS_ADDED
:
2876 case DIFF_STATUS_COPIED
:
2877 case DIFF_STATUS_RENAMED
:
2882 if (p
->one
->mode
&& p
->two
->mode
&&
2883 p
->one
->mode
!= p
->two
->mode
)
2891 void diff_flush(struct diff_options
*options
)
2893 struct diff_queue_struct
*q
= &diff_queued_diff
;
2894 int i
, output_format
= options
->output_format
;
2898 * Order: raw, stat, summary, patch
2899 * or: name/name-status/checkdiff (other bits clear)
2904 if (output_format
& (DIFF_FORMAT_RAW
|
2906 DIFF_FORMAT_NAME_STATUS
|
2907 DIFF_FORMAT_CHECKDIFF
)) {
2908 for (i
= 0; i
< q
->nr
; i
++) {
2909 struct diff_filepair
*p
= q
->queue
[i
];
2910 if (check_pair_status(p
))
2911 flush_one_pair(p
, options
);
2916 if (output_format
& (DIFF_FORMAT_DIFFSTAT
|DIFF_FORMAT_SHORTSTAT
|DIFF_FORMAT_NUMSTAT
)) {
2917 struct diffstat_t diffstat
;
2919 memset(&diffstat
, 0, sizeof(struct diffstat_t
));
2920 diffstat
.xm
.consume
= diffstat_consume
;
2921 for (i
= 0; i
< q
->nr
; i
++) {
2922 struct diff_filepair
*p
= q
->queue
[i
];
2923 if (check_pair_status(p
))
2924 diff_flush_stat(p
, options
, &diffstat
);
2926 if (output_format
& DIFF_FORMAT_NUMSTAT
)
2927 show_numstat(&diffstat
, options
);
2928 if (output_format
& DIFF_FORMAT_DIFFSTAT
)
2929 show_stats(&diffstat
, options
);
2930 else if (output_format
& DIFF_FORMAT_SHORTSTAT
)
2931 show_shortstats(&diffstat
);
2935 if (output_format
& DIFF_FORMAT_SUMMARY
&& !is_summary_empty(q
)) {
2936 for (i
= 0; i
< q
->nr
; i
++)
2937 diff_summary(q
->queue
[i
]);
2941 if (output_format
& DIFF_FORMAT_PATCH
) {
2943 if (options
->stat_sep
) {
2944 /* attach patch instead of inline */
2945 fputs(options
->stat_sep
, stdout
);
2947 putchar(options
->line_termination
);
2951 for (i
= 0; i
< q
->nr
; i
++) {
2952 struct diff_filepair
*p
= q
->queue
[i
];
2953 if (check_pair_status(p
))
2954 diff_flush_patch(p
, options
);
2958 if (output_format
& DIFF_FORMAT_CALLBACK
)
2959 options
->format_callback(q
, options
, options
->format_callback_data
);
2961 for (i
= 0; i
< q
->nr
; i
++)
2962 diff_free_filepair(q
->queue
[i
]);
2966 q
->nr
= q
->alloc
= 0;
2969 static void diffcore_apply_filter(const char *filter
)
2972 struct diff_queue_struct
*q
= &diff_queued_diff
;
2973 struct diff_queue_struct outq
;
2975 outq
.nr
= outq
.alloc
= 0;
2980 if (strchr(filter
, DIFF_STATUS_FILTER_AON
)) {
2982 for (i
= found
= 0; !found
&& i
< q
->nr
; i
++) {
2983 struct diff_filepair
*p
= q
->queue
[i
];
2984 if (((p
->status
== DIFF_STATUS_MODIFIED
) &&
2986 strchr(filter
, DIFF_STATUS_FILTER_BROKEN
)) ||
2988 strchr(filter
, DIFF_STATUS_MODIFIED
)))) ||
2989 ((p
->status
!= DIFF_STATUS_MODIFIED
) &&
2990 strchr(filter
, p
->status
)))
2996 /* otherwise we will clear the whole queue
2997 * by copying the empty outq at the end of this
2998 * function, but first clear the current entries
3001 for (i
= 0; i
< q
->nr
; i
++)
3002 diff_free_filepair(q
->queue
[i
]);
3005 /* Only the matching ones */
3006 for (i
= 0; i
< q
->nr
; i
++) {
3007 struct diff_filepair
*p
= q
->queue
[i
];
3009 if (((p
->status
== DIFF_STATUS_MODIFIED
) &&
3011 strchr(filter
, DIFF_STATUS_FILTER_BROKEN
)) ||
3013 strchr(filter
, DIFF_STATUS_MODIFIED
)))) ||
3014 ((p
->status
!= DIFF_STATUS_MODIFIED
) &&
3015 strchr(filter
, p
->status
)))
3018 diff_free_filepair(p
);
3025 void diffcore_std(struct diff_options
*options
)
3030 if (options
->break_opt
!= -1)
3031 diffcore_break(options
->break_opt
);
3032 if (options
->detect_rename
)
3033 diffcore_rename(options
);
3034 if (options
->break_opt
!= -1)
3035 diffcore_merge_broken();
3036 if (options
->pickaxe
)
3037 diffcore_pickaxe(options
->pickaxe
, options
->pickaxe_opts
);
3038 if (options
->orderfile
)
3039 diffcore_order(options
->orderfile
);
3040 diff_resolve_rename_copy();
3041 diffcore_apply_filter(options
->filter
);
3043 options
->has_changes
= !!diff_queued_diff
.nr
;
3047 void diff_addremove(struct diff_options
*options
,
3048 int addremove
, unsigned mode
,
3049 const unsigned char *sha1
,
3050 const char *base
, const char *path
)
3052 char concatpath
[PATH_MAX
];
3053 struct diff_filespec
*one
, *two
;
3055 /* This may look odd, but it is a preparation for
3056 * feeding "there are unchanged files which should
3057 * not produce diffs, but when you are doing copy
3058 * detection you would need them, so here they are"
3059 * entries to the diff-core. They will be prefixed
3060 * with something like '=' or '*' (I haven't decided
3061 * which but should not make any difference).
3062 * Feeding the same new and old to diff_change()
3063 * also has the same effect.
3064 * Before the final output happens, they are pruned after
3065 * merged into rename/copy pairs as appropriate.
3067 if (options
->reverse_diff
)
3068 addremove
= (addremove
== '+' ? '-' :
3069 addremove
== '-' ? '+' : addremove
);
3071 if (!path
) path
= "";
3072 sprintf(concatpath
, "%s%s", base
, path
);
3073 one
= alloc_filespec(concatpath
);
3074 two
= alloc_filespec(concatpath
);
3076 if (addremove
!= '+')
3077 fill_filespec(one
, sha1
, mode
);
3078 if (addremove
!= '-')
3079 fill_filespec(two
, sha1
, mode
);
3081 diff_queue(&diff_queued_diff
, one
, two
);
3082 options
->has_changes
= 1;
3085 void diff_change(struct diff_options
*options
,
3086 unsigned old_mode
, unsigned new_mode
,
3087 const unsigned char *old_sha1
,
3088 const unsigned char *new_sha1
,
3089 const char *base
, const char *path
)
3091 char concatpath
[PATH_MAX
];
3092 struct diff_filespec
*one
, *two
;
3094 if (options
->reverse_diff
) {
3096 const unsigned char *tmp_c
;
3097 tmp
= old_mode
; old_mode
= new_mode
; new_mode
= tmp
;
3098 tmp_c
= old_sha1
; old_sha1
= new_sha1
; new_sha1
= tmp_c
;
3100 if (!path
) path
= "";
3101 sprintf(concatpath
, "%s%s", base
, path
);
3102 one
= alloc_filespec(concatpath
);
3103 two
= alloc_filespec(concatpath
);
3104 fill_filespec(one
, old_sha1
, old_mode
);
3105 fill_filespec(two
, new_sha1
, new_mode
);
3107 diff_queue(&diff_queued_diff
, one
, two
);
3108 options
->has_changes
= 1;
3111 void diff_unmerge(struct diff_options
*options
,
3113 unsigned mode
, const unsigned char *sha1
)
3115 struct diff_filespec
*one
, *two
;
3116 one
= alloc_filespec(path
);
3117 two
= alloc_filespec(path
);
3118 fill_filespec(one
, sha1
, mode
);
3119 diff_queue(&diff_queued_diff
, one
, two
)->is_unmerged
= 1;