4 * Copyright (C) Linus Torvalds, 2005
6 * This applies patches on top of some (arbitrary) version of the SCM.
10 #include "cache-tree.h"
17 * --check turns on checking that the working tree matches the
18 * files that are being modified, but doesn't apply the patch
19 * --stat does just a diffstat, and doesn't actually apply
20 * --numstat does numeric diffstat, and doesn't actually apply
21 * --index-info shows the old and new index info for paths if available.
22 * --index updates the cache as well.
23 * --cached updates only the cache without ever touching the working tree.
25 static const char *prefix
;
26 static int prefix_length
= -1;
27 static int newfd
= -1;
29 static int unidiff_zero
;
30 static int p_value
= 1;
31 static int p_value_known
;
32 static int check_index
;
33 static int update_index
;
40 static int apply_in_reverse
;
41 static int apply_with_reject
;
42 static int apply_verbosely
;
44 static int show_index_info
;
45 static int line_termination
= '\n';
46 static unsigned long p_context
= ULONG_MAX
;
47 static const char apply_usage
[] =
48 "git-apply [--stat] [--numstat] [--summary] [--check] [--index] [--cached] [--apply] [--no-add] [--index-info] [--allow-binary-replacement] [--reverse] [--reject] [--verbose] [-z] [-pNUM] [-CNUM] [--whitespace=<nowarn|warn|error|error-all|strip>] <patch>...";
50 static enum whitespace_eol
{
55 } new_whitespace
= warn_on_whitespace
;
56 static int whitespace_error
;
57 static int squelch_whitespace_errors
= 5;
58 static int applied_after_fixing_ws
;
59 static const char *patch_input_file
;
61 static void parse_whitespace_option(const char *option
)
64 new_whitespace
= warn_on_whitespace
;
67 if (!strcmp(option
, "warn")) {
68 new_whitespace
= warn_on_whitespace
;
71 if (!strcmp(option
, "nowarn")) {
72 new_whitespace
= nowarn_whitespace
;
75 if (!strcmp(option
, "error")) {
76 new_whitespace
= error_on_whitespace
;
79 if (!strcmp(option
, "error-all")) {
80 new_whitespace
= error_on_whitespace
;
81 squelch_whitespace_errors
= 0;
84 if (!strcmp(option
, "strip")) {
85 new_whitespace
= strip_whitespace
;
88 die("unrecognized whitespace option '%s'", option
);
91 static void set_default_whitespace_mode(const char *whitespace_option
)
93 if (!whitespace_option
&& !apply_default_whitespace
) {
94 new_whitespace
= (apply
101 * For "diff-stat" like behaviour, we keep track of the biggest change
102 * we've seen, and the longest filename. That allows us to do simple
105 static int max_change
, max_len
;
108 * Various "current state", notably line numbers and what
109 * file (and how) we're patching right now.. The "is_xxxx"
110 * things are flags, where -1 means "don't know yet".
112 static int linenr
= 1;
115 * This represents one "hunk" from a patch, starting with
116 * "@@ -oldpos,oldlines +newpos,newlines @@" marker. The
117 * patch text is pointed at by patch, and its byte length
118 * is stored in size. leading and trailing are the number
122 unsigned long leading
, trailing
;
123 unsigned long oldpos
, oldlines
;
124 unsigned long newpos
, newlines
;
128 struct fragment
*next
;
132 * When dealing with a binary patch, we reuse "leading" field
133 * to store the type of the binary hunk, either deflated "delta"
134 * or deflated "literal".
136 #define binary_patch_method leading
137 #define BINARY_DELTA_DEFLATED 1
138 #define BINARY_LITERAL_DEFLATED 2
141 char *new_name
, *old_name
, *def_name
;
142 unsigned int old_mode
, new_mode
;
143 int is_new
, is_delete
; /* -1 = unknown, 0 = false, 1 = true */
145 unsigned long deflate_origlen
;
146 int lines_added
, lines_deleted
;
148 unsigned int is_toplevel_relative
:1;
149 unsigned int inaccurate_eof
:1;
150 unsigned int is_binary
:1;
151 unsigned int is_copy
:1;
152 unsigned int is_rename
:1;
153 struct fragment
*fragments
;
155 unsigned long resultsize
;
156 char old_sha1_prefix
[41];
157 char new_sha1_prefix
[41];
161 static void say_patch_name(FILE *output
, const char *pre
, struct patch
*patch
, const char *post
)
164 if (patch
->old_name
&& patch
->new_name
&&
165 strcmp(patch
->old_name
, patch
->new_name
)) {
166 write_name_quoted(NULL
, 0, patch
->old_name
, 1, output
);
167 fputs(" => ", output
);
168 write_name_quoted(NULL
, 0, patch
->new_name
, 1, output
);
171 const char *n
= patch
->new_name
;
174 write_name_quoted(NULL
, 0, n
, 1, output
);
179 #define CHUNKSIZE (8192)
182 static void *read_patch_file(int fd
, unsigned long *sizep
)
186 strbuf_init(&buf
, 0);
187 if (strbuf_read(&buf
, fd
, 0) < 0)
188 die("git-apply: read returned %s", strerror(errno
));
192 * Make sure that we have some slop in the buffer
193 * so that we can do speculative "memcmp" etc, and
194 * see to it that it is NUL-filled.
196 strbuf_grow(&buf
, SLOP
);
197 memset(buf
.buf
+ buf
.len
, 0, SLOP
);
198 return strbuf_detach(&buf
);
201 static unsigned long linelen(const char *buffer
, unsigned long size
)
203 unsigned long len
= 0;
206 if (*buffer
++ == '\n')
212 static int is_dev_null(const char *str
)
214 return !memcmp("/dev/null", str
, 9) && isspace(str
[9]);
220 static int name_terminate(const char *name
, int namelen
, int c
, int terminate
)
222 if (c
== ' ' && !(terminate
& TERM_SPACE
))
224 if (c
== '\t' && !(terminate
& TERM_TAB
))
230 static char *find_name(const char *line
, char *def
, int p_value
, int terminate
)
233 const char *start
= line
;
237 /* Proposed "new-style" GNU patch/diff format; see
238 * http://marc.theaimsgroup.com/?l=git&m=112927316408690&w=2
240 name
= unquote_c_style(line
, NULL
);
244 cp
= strchr(cp
, '/');
251 /* name can later be freed, so we need
252 * to memmove, not just return cp
254 memmove(name
, cp
, strlen(cp
) + 1);
271 if (name_terminate(start
, line
-start
, c
, terminate
))
275 if (c
== '/' && !--p_value
)
285 * Generally we prefer the shorter name, especially
286 * if the other one is just a variation of that with
287 * something else tacked on to the end (ie "file.orig"
291 int deflen
= strlen(def
);
292 if (deflen
< len
&& !strncmp(start
, def
, deflen
))
297 return xmemdupz(start
, len
);
300 static int count_slashes(const char *cp
)
312 * Given the string after "--- " or "+++ ", guess the appropriate
313 * p_value for the given patch.
315 static int guess_p_value(const char *nameline
)
320 if (is_dev_null(nameline
))
322 name
= find_name(nameline
, NULL
, 0, TERM_SPACE
| TERM_TAB
);
325 cp
= strchr(name
, '/');
330 * Does it begin with "a/$our-prefix" and such? Then this is
331 * very likely to apply to our directory.
333 if (!strncmp(name
, prefix
, prefix_length
))
334 val
= count_slashes(prefix
);
337 if (!strncmp(cp
, prefix
, prefix_length
))
338 val
= count_slashes(prefix
) + 1;
346 * Get the name etc info from the --/+++ lines of a traditional patch header
348 * FIXME! The end-of-filename heuristics are kind of screwy. For existing
349 * files, we can happily check the index for a match, but for creating a
350 * new file we should try to match whatever "patch" does. I have no idea.
352 static void parse_traditional_patch(const char *first
, const char *second
, struct patch
*patch
)
356 first
+= 4; /* skip "--- " */
357 second
+= 4; /* skip "+++ " */
358 if (!p_value_known
) {
360 p
= guess_p_value(first
);
361 q
= guess_p_value(second
);
363 if (0 <= p
&& p
== q
) {
368 if (is_dev_null(first
)) {
370 patch
->is_delete
= 0;
371 name
= find_name(second
, NULL
, p_value
, TERM_SPACE
| TERM_TAB
);
372 patch
->new_name
= name
;
373 } else if (is_dev_null(second
)) {
375 patch
->is_delete
= 1;
376 name
= find_name(first
, NULL
, p_value
, TERM_SPACE
| TERM_TAB
);
377 patch
->old_name
= name
;
379 name
= find_name(first
, NULL
, p_value
, TERM_SPACE
| TERM_TAB
);
380 name
= find_name(second
, name
, p_value
, TERM_SPACE
| TERM_TAB
);
381 patch
->old_name
= patch
->new_name
= name
;
384 die("unable to find filename in patch at line %d", linenr
);
387 static int gitdiff_hdrend(const char *line
, struct patch
*patch
)
393 * We're anal about diff header consistency, to make
394 * sure that we don't end up having strange ambiguous
395 * patches floating around.
397 * As a result, gitdiff_{old|new}name() will check
398 * their names against any previous information, just
401 static char *gitdiff_verify_name(const char *line
, int isnull
, char *orig_name
, const char *oldnew
)
403 if (!orig_name
&& !isnull
)
404 return find_name(line
, NULL
, p_value
, TERM_TAB
);
413 die("git-apply: bad git-diff - expected /dev/null, got %s on line %d", name
, linenr
);
414 another
= find_name(line
, NULL
, p_value
, TERM_TAB
);
415 if (!another
|| memcmp(another
, name
, len
))
416 die("git-apply: bad git-diff - inconsistent %s filename on line %d", oldnew
, linenr
);
421 /* expect "/dev/null" */
422 if (memcmp("/dev/null", line
, 9) || line
[9] != '\n')
423 die("git-apply: bad git-diff - expected /dev/null on line %d", linenr
);
428 static int gitdiff_oldname(const char *line
, struct patch
*patch
)
430 patch
->old_name
= gitdiff_verify_name(line
, patch
->is_new
, patch
->old_name
, "old");
434 static int gitdiff_newname(const char *line
, struct patch
*patch
)
436 patch
->new_name
= gitdiff_verify_name(line
, patch
->is_delete
, patch
->new_name
, "new");
440 static int gitdiff_oldmode(const char *line
, struct patch
*patch
)
442 patch
->old_mode
= strtoul(line
, NULL
, 8);
446 static int gitdiff_newmode(const char *line
, struct patch
*patch
)
448 patch
->new_mode
= strtoul(line
, NULL
, 8);
452 static int gitdiff_delete(const char *line
, struct patch
*patch
)
454 patch
->is_delete
= 1;
455 patch
->old_name
= patch
->def_name
;
456 return gitdiff_oldmode(line
, patch
);
459 static int gitdiff_newfile(const char *line
, struct patch
*patch
)
462 patch
->new_name
= patch
->def_name
;
463 return gitdiff_newmode(line
, patch
);
466 static int gitdiff_copysrc(const char *line
, struct patch
*patch
)
469 patch
->old_name
= find_name(line
, NULL
, 0, 0);
473 static int gitdiff_copydst(const char *line
, struct patch
*patch
)
476 patch
->new_name
= find_name(line
, NULL
, 0, 0);
480 static int gitdiff_renamesrc(const char *line
, struct patch
*patch
)
482 patch
->is_rename
= 1;
483 patch
->old_name
= find_name(line
, NULL
, 0, 0);
487 static int gitdiff_renamedst(const char *line
, struct patch
*patch
)
489 patch
->is_rename
= 1;
490 patch
->new_name
= find_name(line
, NULL
, 0, 0);
494 static int gitdiff_similarity(const char *line
, struct patch
*patch
)
496 if ((patch
->score
= strtoul(line
, NULL
, 10)) == ULONG_MAX
)
501 static int gitdiff_dissimilarity(const char *line
, struct patch
*patch
)
503 if ((patch
->score
= strtoul(line
, NULL
, 10)) == ULONG_MAX
)
508 static int gitdiff_index(const char *line
, struct patch
*patch
)
510 /* index line is N hexadecimal, "..", N hexadecimal,
511 * and optional space with octal mode.
513 const char *ptr
, *eol
;
516 ptr
= strchr(line
, '.');
517 if (!ptr
|| ptr
[1] != '.' || 40 < ptr
- line
)
520 memcpy(patch
->old_sha1_prefix
, line
, len
);
521 patch
->old_sha1_prefix
[len
] = 0;
524 ptr
= strchr(line
, ' ');
525 eol
= strchr(line
, '\n');
527 if (!ptr
|| eol
< ptr
)
533 memcpy(patch
->new_sha1_prefix
, line
, len
);
534 patch
->new_sha1_prefix
[len
] = 0;
536 patch
->new_mode
= patch
->old_mode
= strtoul(ptr
+1, NULL
, 8);
541 * This is normal for a diff that doesn't change anything: we'll fall through
542 * into the next diff. Tell the parser to break out.
544 static int gitdiff_unrecognized(const char *line
, struct patch
*patch
)
549 static const char *stop_at_slash(const char *line
, int llen
)
553 for (i
= 0; i
< llen
; i
++) {
561 /* This is to extract the same name that appears on "diff --git"
562 * line. We do not find and return anything if it is a rename
563 * patch, and it is OK because we will find the name elsewhere.
564 * We need to reliably find name only when it is mode-change only,
565 * creation or deletion of an empty file. In any of these cases,
566 * both sides are the same name under a/ and b/ respectively.
568 static char *git_header_name(char *line
, int llen
)
572 const char *second
= NULL
;
574 line
+= strlen("diff --git ");
575 llen
-= strlen("diff --git ");
579 char *first
= unquote_c_style(line
, &second
);
583 /* advance to the first slash */
584 cp
= stop_at_slash(first
, strlen(first
));
585 if (!cp
|| cp
== first
) {
586 /* we do not accept absolute paths */
592 memmove(first
, cp
+1, len
+1); /* including NUL */
594 /* second points at one past closing dq of name.
595 * find the second name.
597 while ((second
< line
+ llen
) && isspace(*second
))
600 if (line
+ llen
<= second
)
601 goto free_first_and_fail
;
602 if (*second
== '"') {
603 char *sp
= unquote_c_style(second
, NULL
);
605 goto free_first_and_fail
;
606 cp
= stop_at_slash(sp
, strlen(sp
));
607 if (!cp
|| cp
== sp
) {
610 goto free_first_and_fail
;
612 /* They must match, otherwise ignore */
613 if (strcmp(cp
+1, first
))
614 goto free_both_and_fail
;
619 /* unquoted second */
620 cp
= stop_at_slash(second
, line
+ llen
- second
);
621 if (!cp
|| cp
== second
)
622 goto free_first_and_fail
;
624 if (line
+ llen
- cp
!= len
+ 1 ||
625 memcmp(first
, cp
, len
))
626 goto free_first_and_fail
;
630 /* unquoted first name */
631 name
= stop_at_slash(line
, llen
);
632 if (!name
|| name
== line
)
637 /* since the first name is unquoted, a dq if exists must be
638 * the beginning of the second name.
640 for (second
= name
; second
< line
+ llen
; second
++) {
641 if (*second
== '"') {
642 const char *cp
= second
;
644 char *sp
= unquote_c_style(second
, NULL
);
648 np
= stop_at_slash(sp
, strlen(sp
));
649 if (!np
|| np
== sp
) {
650 free_second_and_fail
:
656 if (len
< cp
- name
&&
657 !strncmp(np
, name
, len
) &&
658 isspace(name
[len
])) {
660 memmove(sp
, np
, len
+ 1);
663 goto free_second_and_fail
;
668 * Accept a name only if it shows up twice, exactly the same
671 for (len
= 0 ; ; len
++) {
686 if (second
[len
] == '\n' && !memcmp(name
, second
, len
)) {
687 return xmemdupz(name
, len
);
694 /* Verify that we recognize the lines following a git header */
695 static int parse_git_header(char *line
, int len
, unsigned int size
, struct patch
*patch
)
697 unsigned long offset
;
699 /* A git diff has explicit new/delete information, so we don't guess */
701 patch
->is_delete
= 0;
704 * Some things may not have the old name in the
705 * rest of the headers anywhere (pure mode changes,
706 * or removing or adding empty files), so we get
707 * the default name from the header.
709 patch
->def_name
= git_header_name(line
, len
);
714 for (offset
= len
; size
> 0 ; offset
+= len
, size
-= len
, line
+= len
, linenr
++) {
715 static const struct opentry
{
717 int (*fn
)(const char *, struct patch
*);
719 { "@@ -", gitdiff_hdrend
},
720 { "--- ", gitdiff_oldname
},
721 { "+++ ", gitdiff_newname
},
722 { "old mode ", gitdiff_oldmode
},
723 { "new mode ", gitdiff_newmode
},
724 { "deleted file mode ", gitdiff_delete
},
725 { "new file mode ", gitdiff_newfile
},
726 { "copy from ", gitdiff_copysrc
},
727 { "copy to ", gitdiff_copydst
},
728 { "rename old ", gitdiff_renamesrc
},
729 { "rename new ", gitdiff_renamedst
},
730 { "rename from ", gitdiff_renamesrc
},
731 { "rename to ", gitdiff_renamedst
},
732 { "similarity index ", gitdiff_similarity
},
733 { "dissimilarity index ", gitdiff_dissimilarity
},
734 { "index ", gitdiff_index
},
735 { "", gitdiff_unrecognized
},
739 len
= linelen(line
, size
);
740 if (!len
|| line
[len
-1] != '\n')
742 for (i
= 0; i
< ARRAY_SIZE(optable
); i
++) {
743 const struct opentry
*p
= optable
+ i
;
744 int oplen
= strlen(p
->str
);
745 if (len
< oplen
|| memcmp(p
->str
, line
, oplen
))
747 if (p
->fn(line
+ oplen
, patch
) < 0)
756 static int parse_num(const char *line
, unsigned long *p
)
762 *p
= strtoul(line
, &ptr
, 10);
766 static int parse_range(const char *line
, int len
, int offset
, const char *expect
,
767 unsigned long *p1
, unsigned long *p2
)
771 if (offset
< 0 || offset
>= len
)
776 digits
= parse_num(line
, p1
);
786 digits
= parse_num(line
+1, p2
);
798 if (memcmp(line
, expect
, ex
))
805 * Parse a unified diff fragment header of the
806 * form "@@ -a,b +c,d @@"
808 static int parse_fragment_header(char *line
, int len
, struct fragment
*fragment
)
812 if (!len
|| line
[len
-1] != '\n')
815 /* Figure out the number of lines in a fragment */
816 offset
= parse_range(line
, len
, 4, " +", &fragment
->oldpos
, &fragment
->oldlines
);
817 offset
= parse_range(line
, len
, offset
, " @@", &fragment
->newpos
, &fragment
->newlines
);
822 static int find_header(char *line
, unsigned long size
, int *hdrsize
, struct patch
*patch
)
824 unsigned long offset
, len
;
826 patch
->is_toplevel_relative
= 0;
827 patch
->is_rename
= patch
->is_copy
= 0;
828 patch
->is_new
= patch
->is_delete
= -1;
829 patch
->old_mode
= patch
->new_mode
= 0;
830 patch
->old_name
= patch
->new_name
= NULL
;
831 for (offset
= 0; size
> 0; offset
+= len
, size
-= len
, line
+= len
, linenr
++) {
832 unsigned long nextlen
;
834 len
= linelen(line
, size
);
838 /* Testing this early allows us to take a few shortcuts.. */
843 * Make sure we don't find any unconnected patch fragments.
844 * That's a sign that we didn't find a header, and that a
845 * patch has become corrupted/broken up.
847 if (!memcmp("@@ -", line
, 4)) {
848 struct fragment dummy
;
849 if (parse_fragment_header(line
, len
, &dummy
) < 0)
851 die("patch fragment without header at line %d: %.*s",
852 linenr
, (int)len
-1, line
);
859 * Git patch? It might not have a real patch, just a rename
860 * or mode change, so we handle that specially
862 if (!memcmp("diff --git ", line
, 11)) {
863 int git_hdr_len
= parse_git_header(line
, len
, size
, patch
);
864 if (git_hdr_len
<= len
)
866 if (!patch
->old_name
&& !patch
->new_name
) {
867 if (!patch
->def_name
)
868 die("git diff header lacks filename information (line %d)", linenr
);
869 patch
->old_name
= patch
->new_name
= patch
->def_name
;
871 patch
->is_toplevel_relative
= 1;
872 *hdrsize
= git_hdr_len
;
876 /** --- followed by +++ ? */
877 if (memcmp("--- ", line
, 4) || memcmp("+++ ", line
+ len
, 4))
881 * We only accept unified patches, so we want it to
882 * at least have "@@ -a,b +c,d @@\n", which is 14 chars
885 nextlen
= linelen(line
+ len
, size
- len
);
886 if (size
< nextlen
+ 14 || memcmp("@@ -", line
+ len
+ nextlen
, 4))
889 /* Ok, we'll consider it a patch */
890 parse_traditional_patch(line
, line
+len
, patch
);
891 *hdrsize
= len
+ nextlen
;
898 static void check_whitespace(const char *line
, int len
)
900 const char *err
= "Adds trailing whitespace";
905 * We know len is at least two, since we have a '+' and we
906 * checked that the last character was a '\n' before calling
907 * this function. That is, an addition of an empty line would
908 * check the '+' here. Sneaky...
910 if (isspace(line
[len
-2]))
914 * Make sure that there is no space followed by a tab in
917 err
= "Space in indent is followed by a tab";
918 for (i
= 1; i
< len
; i
++) {
919 if (line
[i
] == '\t') {
923 else if (line
[i
] == ' ')
932 if (squelch_whitespace_errors
&&
933 squelch_whitespace_errors
< whitespace_error
)
936 fprintf(stderr
, "%s.\n%s:%d:%.*s\n",
937 err
, patch_input_file
, linenr
, len
-2, line
+1);
942 * Parse a unified diff. Note that this really needs to parse each
943 * fragment separately, since the only way to know the difference
944 * between a "---" that is part of a patch, and a "---" that starts
945 * the next patch is to look at the line counts..
947 static int parse_fragment(char *line
, unsigned long size
, struct patch
*patch
, struct fragment
*fragment
)
950 int len
= linelen(line
, size
), offset
;
951 unsigned long oldlines
, newlines
;
952 unsigned long leading
, trailing
;
954 offset
= parse_fragment_header(line
, len
, fragment
);
957 oldlines
= fragment
->oldlines
;
958 newlines
= fragment
->newlines
;
962 /* Parse the thing.. */
969 offset
+= len
, size
-= len
, line
+= len
, linenr
++) {
970 if (!oldlines
&& !newlines
)
972 len
= linelen(line
, size
);
973 if (!len
|| line
[len
-1] != '\n')
978 case '\n': /* newer GNU diff, an empty context line */
982 if (!deleted
&& !added
)
987 if (apply_in_reverse
&&
988 new_whitespace
!= nowarn_whitespace
)
989 check_whitespace(line
, len
);
995 if (!apply_in_reverse
&&
996 new_whitespace
!= nowarn_whitespace
)
997 check_whitespace(line
, len
);
1003 /* We allow "\ No newline at end of file". Depending
1004 * on locale settings when the patch was produced we
1005 * don't know what this line looks like. The only
1006 * thing we do know is that it begins with "\ ".
1007 * Checking for 12 is just for sanity check -- any
1008 * l10n of "\ No newline..." is at least that long.
1011 if (len
< 12 || memcmp(line
, "\\ ", 2))
1016 if (oldlines
|| newlines
)
1018 fragment
->leading
= leading
;
1019 fragment
->trailing
= trailing
;
1021 /* If a fragment ends with an incomplete line, we failed to include
1022 * it in the above loop because we hit oldlines == newlines == 0
1025 if (12 < size
&& !memcmp(line
, "\\ ", 2))
1026 offset
+= linelen(line
, size
);
1028 patch
->lines_added
+= added
;
1029 patch
->lines_deleted
+= deleted
;
1031 if (0 < patch
->is_new
&& oldlines
)
1032 return error("new file depends on old contents");
1033 if (0 < patch
->is_delete
&& newlines
)
1034 return error("deleted file still has contents");
1038 static int parse_single_patch(char *line
, unsigned long size
, struct patch
*patch
)
1040 unsigned long offset
= 0;
1041 unsigned long oldlines
= 0, newlines
= 0, context
= 0;
1042 struct fragment
**fragp
= &patch
->fragments
;
1044 while (size
> 4 && !memcmp(line
, "@@ -", 4)) {
1045 struct fragment
*fragment
;
1048 fragment
= xcalloc(1, sizeof(*fragment
));
1049 len
= parse_fragment(line
, size
, patch
, fragment
);
1051 die("corrupt patch at line %d", linenr
);
1052 fragment
->patch
= line
;
1053 fragment
->size
= len
;
1054 oldlines
+= fragment
->oldlines
;
1055 newlines
+= fragment
->newlines
;
1056 context
+= fragment
->leading
+ fragment
->trailing
;
1059 fragp
= &fragment
->next
;
1067 * If something was removed (i.e. we have old-lines) it cannot
1068 * be creation, and if something was added it cannot be
1069 * deletion. However, the reverse is not true; --unified=0
1070 * patches that only add are not necessarily creation even
1071 * though they do not have any old lines, and ones that only
1072 * delete are not necessarily deletion.
1074 * Unfortunately, a real creation/deletion patch do _not_ have
1075 * any context line by definition, so we cannot safely tell it
1076 * apart with --unified=0 insanity. At least if the patch has
1077 * more than one hunk it is not creation or deletion.
1079 if (patch
->is_new
< 0 &&
1080 (oldlines
|| (patch
->fragments
&& patch
->fragments
->next
)))
1082 if (patch
->is_delete
< 0 &&
1083 (newlines
|| (patch
->fragments
&& patch
->fragments
->next
)))
1084 patch
->is_delete
= 0;
1085 if (!unidiff_zero
|| context
) {
1086 /* If the user says the patch is not generated with
1087 * --unified=0, or if we have seen context lines,
1088 * then not having oldlines means the patch is creation,
1089 * and not having newlines means the patch is deletion.
1091 if (patch
->is_new
< 0 && !oldlines
) {
1093 patch
->old_name
= NULL
;
1095 if (patch
->is_delete
< 0 && !newlines
) {
1096 patch
->is_delete
= 1;
1097 patch
->new_name
= NULL
;
1101 if (0 < patch
->is_new
&& oldlines
)
1102 die("new file %s depends on old contents", patch
->new_name
);
1103 if (0 < patch
->is_delete
&& newlines
)
1104 die("deleted file %s still has contents", patch
->old_name
);
1105 if (!patch
->is_delete
&& !newlines
&& context
)
1106 fprintf(stderr
, "** warning: file %s becomes empty but "
1107 "is not deleted\n", patch
->new_name
);
1112 static inline int metadata_changes(struct patch
*patch
)
1114 return patch
->is_rename
> 0 ||
1115 patch
->is_copy
> 0 ||
1116 patch
->is_new
> 0 ||
1118 (patch
->old_mode
&& patch
->new_mode
&&
1119 patch
->old_mode
!= patch
->new_mode
);
1122 static char *inflate_it(const void *data
, unsigned long size
,
1123 unsigned long inflated_size
)
1129 memset(&stream
, 0, sizeof(stream
));
1131 stream
.next_in
= (unsigned char *)data
;
1132 stream
.avail_in
= size
;
1133 stream
.next_out
= out
= xmalloc(inflated_size
);
1134 stream
.avail_out
= inflated_size
;
1135 inflateInit(&stream
);
1136 st
= inflate(&stream
, Z_FINISH
);
1137 if ((st
!= Z_STREAM_END
) || stream
.total_out
!= inflated_size
) {
1144 static struct fragment
*parse_binary_hunk(char **buf_p
,
1145 unsigned long *sz_p
,
1149 /* Expect a line that begins with binary patch method ("literal"
1150 * or "delta"), followed by the length of data before deflating.
1151 * a sequence of 'length-byte' followed by base-85 encoded data
1152 * should follow, terminated by a newline.
1154 * Each 5-byte sequence of base-85 encodes up to 4 bytes,
1155 * and we would limit the patch line to 66 characters,
1156 * so one line can fit up to 13 groups that would decode
1157 * to 52 bytes max. The length byte 'A'-'Z' corresponds
1158 * to 1-26 bytes, and 'a'-'z' corresponds to 27-52 bytes.
1161 unsigned long size
= *sz_p
;
1162 char *buffer
= *buf_p
;
1164 unsigned long origlen
;
1167 struct fragment
*frag
;
1169 llen
= linelen(buffer
, size
);
1174 if (!prefixcmp(buffer
, "delta ")) {
1175 patch_method
= BINARY_DELTA_DEFLATED
;
1176 origlen
= strtoul(buffer
+ 6, NULL
, 10);
1178 else if (!prefixcmp(buffer
, "literal ")) {
1179 patch_method
= BINARY_LITERAL_DEFLATED
;
1180 origlen
= strtoul(buffer
+ 8, NULL
, 10);
1188 int byte_length
, max_byte_length
, newsize
;
1189 llen
= linelen(buffer
, size
);
1193 /* consume the blank line */
1198 /* Minimum line is "A00000\n" which is 7-byte long,
1199 * and the line length must be multiple of 5 plus 2.
1201 if ((llen
< 7) || (llen
-2) % 5)
1203 max_byte_length
= (llen
- 2) / 5 * 4;
1204 byte_length
= *buffer
;
1205 if ('A' <= byte_length
&& byte_length
<= 'Z')
1206 byte_length
= byte_length
- 'A' + 1;
1207 else if ('a' <= byte_length
&& byte_length
<= 'z')
1208 byte_length
= byte_length
- 'a' + 27;
1211 /* if the input length was not multiple of 4, we would
1212 * have filler at the end but the filler should never
1215 if (max_byte_length
< byte_length
||
1216 byte_length
<= max_byte_length
- 4)
1218 newsize
= hunk_size
+ byte_length
;
1219 data
= xrealloc(data
, newsize
);
1220 if (decode_85(data
+ hunk_size
, buffer
+ 1, byte_length
))
1222 hunk_size
= newsize
;
1227 frag
= xcalloc(1, sizeof(*frag
));
1228 frag
->patch
= inflate_it(data
, hunk_size
, origlen
);
1232 frag
->size
= origlen
;
1236 frag
->binary_patch_method
= patch_method
;
1242 error("corrupt binary patch at line %d: %.*s",
1243 linenr
-1, llen
-1, buffer
);
1247 static int parse_binary(char *buffer
, unsigned long size
, struct patch
*patch
)
1249 /* We have read "GIT binary patch\n"; what follows is a line
1250 * that says the patch method (currently, either "literal" or
1251 * "delta") and the length of data before deflating; a
1252 * sequence of 'length-byte' followed by base-85 encoded data
1255 * When a binary patch is reversible, there is another binary
1256 * hunk in the same format, starting with patch method (either
1257 * "literal" or "delta") with the length of data, and a sequence
1258 * of length-byte + base-85 encoded data, terminated with another
1259 * empty line. This data, when applied to the postimage, produces
1262 struct fragment
*forward
;
1263 struct fragment
*reverse
;
1267 forward
= parse_binary_hunk(&buffer
, &size
, &status
, &used
);
1268 if (!forward
&& !status
)
1269 /* there has to be one hunk (forward hunk) */
1270 return error("unrecognized binary patch at line %d", linenr
-1);
1272 /* otherwise we already gave an error message */
1275 reverse
= parse_binary_hunk(&buffer
, &size
, &status
, &used_1
);
1279 /* not having reverse hunk is not an error, but having
1280 * a corrupt reverse hunk is.
1282 free((void*) forward
->patch
);
1286 forward
->next
= reverse
;
1287 patch
->fragments
= forward
;
1288 patch
->is_binary
= 1;
1292 static int parse_chunk(char *buffer
, unsigned long size
, struct patch
*patch
)
1294 int hdrsize
, patchsize
;
1295 int offset
= find_header(buffer
, size
, &hdrsize
, patch
);
1300 patchsize
= parse_single_patch(buffer
+ offset
+ hdrsize
, size
- offset
- hdrsize
, patch
);
1303 static const char *binhdr
[] = {
1308 static const char git_binary
[] = "GIT binary patch\n";
1310 int hd
= hdrsize
+ offset
;
1311 unsigned long llen
= linelen(buffer
+ hd
, size
- hd
);
1313 if (llen
== sizeof(git_binary
) - 1 &&
1314 !memcmp(git_binary
, buffer
+ hd
, llen
)) {
1317 used
= parse_binary(buffer
+ hd
+ llen
,
1318 size
- hd
- llen
, patch
);
1320 patchsize
= used
+ llen
;
1324 else if (!memcmp(" differ\n", buffer
+ hd
+ llen
- 8, 8)) {
1325 for (i
= 0; binhdr
[i
]; i
++) {
1326 int len
= strlen(binhdr
[i
]);
1327 if (len
< size
- hd
&&
1328 !memcmp(binhdr
[i
], buffer
+ hd
, len
)) {
1330 patch
->is_binary
= 1;
1337 /* Empty patch cannot be applied if it is a text patch
1338 * without metadata change. A binary patch appears
1341 if ((apply
|| check
) &&
1342 (!patch
->is_binary
&& !metadata_changes(patch
)))
1343 die("patch with only garbage at line %d", linenr
);
1346 return offset
+ hdrsize
+ patchsize
;
1349 #define swap(a,b) myswap((a),(b),sizeof(a))
1351 #define myswap(a, b, size) do { \
1352 unsigned char mytmp[size]; \
1353 memcpy(mytmp, &a, size); \
1354 memcpy(&a, &b, size); \
1355 memcpy(&b, mytmp, size); \
1358 static void reverse_patches(struct patch
*p
)
1360 for (; p
; p
= p
->next
) {
1361 struct fragment
*frag
= p
->fragments
;
1363 swap(p
->new_name
, p
->old_name
);
1364 swap(p
->new_mode
, p
->old_mode
);
1365 swap(p
->is_new
, p
->is_delete
);
1366 swap(p
->lines_added
, p
->lines_deleted
);
1367 swap(p
->old_sha1_prefix
, p
->new_sha1_prefix
);
1369 for (; frag
; frag
= frag
->next
) {
1370 swap(frag
->newpos
, frag
->oldpos
);
1371 swap(frag
->newlines
, frag
->oldlines
);
1376 static const char pluses
[] = "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
1377 static const char minuses
[]= "----------------------------------------------------------------------";
1379 static void show_stats(struct patch
*patch
)
1381 const char *prefix
= "";
1382 char *name
= patch
->new_name
;
1384 int len
, max
, add
, del
, total
;
1387 name
= patch
->old_name
;
1389 if (0 < (len
= quote_c_style(name
, NULL
, NULL
, 0))) {
1390 qname
= xmalloc(len
+ 1);
1391 quote_c_style(name
, qname
, NULL
, 0);
1396 * "scale" the filename
1407 slash
= strchr(name
, '/');
1414 * scale the add/delete
1420 add
= patch
->lines_added
;
1421 del
= patch
->lines_deleted
;
1424 if (max_change
> 0) {
1425 total
= (total
* max
+ max_change
/ 2) / max_change
;
1426 add
= (add
* max
+ max_change
/ 2) / max_change
;
1429 if (patch
->is_binary
)
1430 printf(" %s%-*s | Bin\n", prefix
, len
, name
);
1432 printf(" %s%-*s |%5d %.*s%.*s\n", prefix
,
1433 len
, name
, patch
->lines_added
+ patch
->lines_deleted
,
1434 add
, pluses
, del
, minuses
);
1438 static int read_old_data(struct stat
*st
, const char *path
, struct strbuf
*buf
)
1442 switch (st
->st_mode
& S_IFMT
) {
1444 strbuf_grow(buf
, st
->st_size
);
1445 if (readlink(path
, buf
->buf
, st
->st_size
) != st
->st_size
)
1447 strbuf_setlen(buf
, st
->st_size
);
1450 fd
= open(path
, O_RDONLY
);
1452 return error("unable to open %s", path
);
1453 if (strbuf_read(buf
, fd
, st
->st_size
) < 0) {
1458 convert_to_git(path
, buf
->buf
, buf
->len
, buf
);
1465 static int find_offset(const char *buf
, unsigned long size
, const char *fragment
, unsigned long fragsize
, int line
, int *lines
)
1468 unsigned long start
, backwards
, forwards
;
1470 if (fragsize
> size
)
1475 unsigned long offset
= 0;
1477 while (offset
+ fragsize
<= size
) {
1478 if (buf
[offset
++] == '\n') {
1486 /* Exact line number? */
1487 if ((start
+ fragsize
<= size
) &&
1488 !memcmp(buf
+ start
, fragment
, fragsize
))
1492 * There's probably some smart way to do this, but I'll leave
1493 * that to the smart and beautiful people. I'm simple and stupid.
1497 for (i
= 0; ; i
++) {
1504 if (forwards
+ fragsize
> size
)
1510 } while (backwards
&& buf
[backwards
-1] != '\n');
1513 while (forwards
+ fragsize
<= size
) {
1514 if (buf
[forwards
++] == '\n')
1520 if (try + fragsize
> size
)
1522 if (memcmp(buf
+ try, fragment
, fragsize
))
1532 * We should start searching forward and backward.
1537 static void remove_first_line(const char **rbuf
, int *rsize
)
1539 const char *buf
= *rbuf
;
1541 unsigned long offset
;
1543 while (offset
<= size
) {
1544 if (buf
[offset
++] == '\n')
1547 *rsize
= size
- offset
;
1548 *rbuf
= buf
+ offset
;
1551 static void remove_last_line(const char **rbuf
, int *rsize
)
1553 const char *buf
= *rbuf
;
1555 unsigned long offset
;
1557 while (offset
> 0) {
1558 if (buf
[--offset
] == '\n')
1561 *rsize
= offset
+ 1;
1564 static int apply_line(char *output
, const char *patch
, int plen
)
1566 /* plen is number of bytes to be copied from patch,
1567 * starting at patch+1 (patch[0] is '+'). Typically
1568 * patch[plen] is '\n', unless this is the incomplete
1572 int add_nl_to_tail
= 0;
1574 int last_tab_in_indent
= -1;
1575 int last_space_in_indent
= -1;
1576 int need_fix_leading_space
= 0;
1579 if ((new_whitespace
!= strip_whitespace
) || !whitespace_error
||
1581 memcpy(output
, patch
+ 1, plen
);
1585 if (1 < plen
&& isspace(patch
[plen
-1])) {
1586 if (patch
[plen
] == '\n')
1589 while (0 < plen
&& isspace(patch
[plen
]))
1594 for (i
= 1; i
< plen
; i
++) {
1597 last_tab_in_indent
= i
;
1598 if (0 <= last_space_in_indent
)
1599 need_fix_leading_space
= 1;
1602 last_space_in_indent
= i
;
1608 if (need_fix_leading_space
) {
1609 int consecutive_spaces
= 0;
1610 /* between patch[1..last_tab_in_indent] strip the
1611 * funny spaces, updating them to tab as needed.
1613 for (i
= 1; i
< last_tab_in_indent
; i
++, plen
--) {
1616 consecutive_spaces
= 0;
1619 consecutive_spaces
++;
1620 if (consecutive_spaces
== 8) {
1622 consecutive_spaces
= 0;
1627 i
= last_tab_in_indent
;
1632 memcpy(output
, patch
+ i
, plen
);
1634 output
[plen
++] = '\n';
1636 applied_after_fixing_ws
++;
1637 return output
+ plen
- buf
;
1640 static int apply_one_fragment(struct strbuf
*buf
, struct fragment
*frag
, int inaccurate_eof
)
1642 int match_beginning
, match_end
;
1643 const char *patch
= frag
->patch
;
1644 int offset
, size
= frag
->size
;
1645 char *old
= xmalloc(size
);
1646 char *new = xmalloc(size
);
1647 const char *oldlines
, *newlines
;
1648 int oldsize
= 0, newsize
= 0;
1649 int new_blank_lines_at_end
= 0;
1650 unsigned long leading
, trailing
;
1655 int len
= linelen(patch
, size
);
1657 int added_blank_line
= 0;
1663 * "plen" is how much of the line we should use for
1664 * the actual patch data. Normally we just remove the
1665 * first character on the line, but if the line is
1666 * followed by "\ No newline", then we also remove the
1667 * last one (which is the newline, of course).
1670 if (len
< size
&& patch
[len
] == '\\')
1673 if (apply_in_reverse
) {
1676 else if (first
== '+')
1682 /* Newer GNU diff, empty context line */
1684 /* ... followed by '\No newline'; nothing */
1686 old
[oldsize
++] = '\n';
1687 new[newsize
++] = '\n';
1691 memcpy(old
+ oldsize
, patch
+ 1, plen
);
1695 /* Fall-through for ' ' */
1697 if (first
!= '+' || !no_add
) {
1698 int added
= apply_line(new + newsize
, patch
,
1702 added
== 1 && new[newsize
-1] == '\n')
1703 added_blank_line
= 1;
1706 case '@': case '\\':
1707 /* Ignore it, we already handled it */
1710 if (apply_verbosely
)
1711 error("invalid start of line: '%c'", first
);
1714 if (added_blank_line
)
1715 new_blank_lines_at_end
++;
1717 new_blank_lines_at_end
= 0;
1722 if (inaccurate_eof
&& oldsize
> 0 && old
[oldsize
- 1] == '\n' &&
1723 newsize
> 0 && new[newsize
- 1] == '\n') {
1730 leading
= frag
->leading
;
1731 trailing
= frag
->trailing
;
1734 * If we don't have any leading/trailing data in the patch,
1735 * we want it to match at the beginning/end of the file.
1737 * But that would break if the patch is generated with
1738 * --unified=0; sane people wouldn't do that to cause us
1739 * trouble, but we try to please not so sane ones as well.
1742 match_beginning
= (!leading
&& !frag
->oldpos
);
1746 match_beginning
= !leading
&& (frag
->oldpos
== 1);
1747 match_end
= !trailing
;
1753 offset
= find_offset(buf
->buf
, buf
->len
,
1754 oldlines
, oldsize
, pos
, &lines
);
1755 if (match_end
&& offset
+ oldsize
!= buf
->len
)
1757 if (match_beginning
&& offset
)
1760 if (new_whitespace
== strip_whitespace
&&
1761 (buf
->len
- oldsize
- offset
== 0)) /* end of file? */
1762 newsize
-= new_blank_lines_at_end
;
1764 /* Warn if it was necessary to reduce the number
1767 if ((leading
!= frag
->leading
) ||
1768 (trailing
!= frag
->trailing
))
1769 fprintf(stderr
, "Context reduced to (%ld/%ld)"
1770 " to apply fragment at %d\n",
1771 leading
, trailing
, pos
+ lines
);
1773 strbuf_splice(buf
, offset
, oldsize
, newlines
, newsize
);
1778 /* Am I at my context limits? */
1779 if ((leading
<= p_context
) && (trailing
<= p_context
))
1781 if (match_beginning
|| match_end
) {
1782 match_beginning
= match_end
= 0;
1785 /* Reduce the number of context lines
1786 * Reduce both leading and trailing if they are equal
1787 * otherwise just reduce the larger context.
1789 if (leading
>= trailing
) {
1790 remove_first_line(&oldlines
, &oldsize
);
1791 remove_first_line(&newlines
, &newsize
);
1795 if (trailing
> leading
) {
1796 remove_last_line(&oldlines
, &oldsize
);
1797 remove_last_line(&newlines
, &newsize
);
1802 if (offset
&& apply_verbosely
)
1803 error("while searching for:\n%.*s", oldsize
, oldlines
);
1810 static int apply_binary_fragment(struct strbuf
*buf
, struct patch
*patch
)
1812 struct fragment
*fragment
= patch
->fragments
;
1816 /* Binary patch is irreversible without the optional second hunk */
1817 if (apply_in_reverse
) {
1818 if (!fragment
->next
)
1819 return error("cannot reverse-apply a binary patch "
1820 "without the reverse hunk to '%s'",
1822 ? patch
->new_name
: patch
->old_name
);
1823 fragment
= fragment
->next
;
1825 switch (fragment
->binary_patch_method
) {
1826 case BINARY_DELTA_DEFLATED
:
1827 dst
= patch_delta(buf
->buf
, buf
->len
, fragment
->patch
,
1828 fragment
->size
, &len
);
1831 /* XXX patch_delta NUL-terminates */
1832 strbuf_attach(buf
, dst
, len
, len
+ 1);
1834 case BINARY_LITERAL_DEFLATED
:
1836 strbuf_add(buf
, fragment
->patch
, fragment
->size
);
1842 static int apply_binary(struct strbuf
*buf
, struct patch
*patch
)
1844 const char *name
= patch
->old_name
? patch
->old_name
: patch
->new_name
;
1845 unsigned char sha1
[20];
1847 /* For safety, we require patch index line to contain
1848 * full 40-byte textual SHA1 for old and new, at least for now.
1850 if (strlen(patch
->old_sha1_prefix
) != 40 ||
1851 strlen(patch
->new_sha1_prefix
) != 40 ||
1852 get_sha1_hex(patch
->old_sha1_prefix
, sha1
) ||
1853 get_sha1_hex(patch
->new_sha1_prefix
, sha1
))
1854 return error("cannot apply binary patch to '%s' "
1855 "without full index line", name
);
1857 if (patch
->old_name
) {
1858 /* See if the old one matches what the patch
1861 hash_sha1_file(buf
->buf
, buf
->len
, blob_type
, sha1
);
1862 if (strcmp(sha1_to_hex(sha1
), patch
->old_sha1_prefix
))
1863 return error("the patch applies to '%s' (%s), "
1864 "which does not match the "
1865 "current contents.",
1866 name
, sha1_to_hex(sha1
));
1869 /* Otherwise, the old one must be empty. */
1871 return error("the patch applies to an empty "
1872 "'%s' but it is not empty", name
);
1875 get_sha1_hex(patch
->new_sha1_prefix
, sha1
);
1876 if (is_null_sha1(sha1
)) {
1877 strbuf_release(buf
);
1878 return 0; /* deletion patch */
1881 if (has_sha1_file(sha1
)) {
1882 /* We already have the postimage */
1883 enum object_type type
;
1887 result
= read_sha1_file(sha1
, &type
, &size
);
1889 return error("the necessary postimage %s for "
1890 "'%s' cannot be read",
1891 patch
->new_sha1_prefix
, name
);
1892 /* XXX read_sha1_file NUL-terminates */
1893 strbuf_attach(buf
, result
, size
, size
+ 1);
1895 /* We have verified buf matches the preimage;
1896 * apply the patch data to it, which is stored
1897 * in the patch->fragments->{patch,size}.
1899 if (apply_binary_fragment(buf
, patch
))
1900 return error("binary patch does not apply to '%s'",
1903 /* verify that the result matches */
1904 hash_sha1_file(buf
->buf
, buf
->len
, blob_type
, sha1
);
1905 if (strcmp(sha1_to_hex(sha1
), patch
->new_sha1_prefix
))
1906 return error("binary patch to '%s' creates incorrect result (expecting %s, got %s)",
1907 name
, patch
->new_sha1_prefix
, sha1_to_hex(sha1
));
1913 static int apply_fragments(struct strbuf
*buf
, struct patch
*patch
)
1915 struct fragment
*frag
= patch
->fragments
;
1916 const char *name
= patch
->old_name
? patch
->old_name
: patch
->new_name
;
1918 if (patch
->is_binary
)
1919 return apply_binary(buf
, patch
);
1922 if (apply_one_fragment(buf
, frag
, patch
->inaccurate_eof
)) {
1923 error("patch failed: %s:%ld", name
, frag
->oldpos
);
1924 if (!apply_with_reject
)
1933 static int read_file_or_gitlink(struct cache_entry
*ce
, struct strbuf
*buf
)
1938 if (S_ISGITLINK(ntohl(ce
->ce_mode
))) {
1939 strbuf_grow(buf
, 100);
1940 strbuf_addf(buf
, "Subproject commit %s\n", sha1_to_hex(ce
->sha1
));
1942 enum object_type type
;
1946 result
= read_sha1_file(ce
->sha1
, &type
, &sz
);
1949 /* XXX read_sha1_file NUL-terminates */
1950 strbuf_attach(buf
, result
, sz
, sz
+ 1);
1955 static int apply_data(struct patch
*patch
, struct stat
*st
, struct cache_entry
*ce
)
1959 strbuf_init(&buf
, 0);
1961 if (read_file_or_gitlink(ce
, &buf
))
1962 return error("read of %s failed", patch
->old_name
);
1963 } else if (patch
->old_name
) {
1964 if (S_ISGITLINK(patch
->old_mode
)) {
1966 read_file_or_gitlink(ce
, &buf
);
1969 * There is no way to apply subproject
1970 * patch without looking at the index.
1972 patch
->fragments
= NULL
;
1975 if (read_old_data(st
, patch
->old_name
, &buf
))
1976 return error("read of %s failed", patch
->old_name
);
1980 if (apply_fragments(&buf
, patch
) < 0)
1981 return -1; /* note with --reject this succeeds. */
1982 patch
->result
= buf
.buf
;
1983 patch
->resultsize
= buf
.len
;
1985 if (0 < patch
->is_delete
&& patch
->resultsize
)
1986 return error("removal patch leaves file contents");
1991 static int check_to_create_blob(const char *new_name
, int ok_if_exists
)
1994 if (!lstat(new_name
, &nst
)) {
1995 if (S_ISDIR(nst
.st_mode
) || ok_if_exists
)
1998 * A leading component of new_name might be a symlink
1999 * that is going to be removed with this patch, but
2000 * still pointing at somewhere that has the path.
2001 * In such a case, path "new_name" does not exist as
2002 * far as git is concerned.
2004 if (has_symlink_leading_path(new_name
, NULL
))
2007 return error("%s: already exists in working directory", new_name
);
2009 else if ((errno
!= ENOENT
) && (errno
!= ENOTDIR
))
2010 return error("%s: %s", new_name
, strerror(errno
));
2014 static int verify_index_match(struct cache_entry
*ce
, struct stat
*st
)
2016 if (S_ISGITLINK(ntohl(ce
->ce_mode
))) {
2017 if (!S_ISDIR(st
->st_mode
))
2021 return ce_match_stat(ce
, st
, 1);
2024 static int check_patch(struct patch
*patch
, struct patch
*prev_patch
)
2027 const char *old_name
= patch
->old_name
;
2028 const char *new_name
= patch
->new_name
;
2029 const char *name
= old_name
? old_name
: new_name
;
2030 struct cache_entry
*ce
= NULL
;
2033 patch
->rejected
= 1; /* we will drop this after we succeed */
2036 * Make sure that we do not have local modifications from the
2037 * index when we are looking at the index. Also make sure
2038 * we have the preimage file to be patched in the work tree,
2039 * unless --cached, which tells git to apply only in the index.
2043 unsigned st_mode
= 0;
2046 stat_ret
= lstat(old_name
, &st
);
2048 int pos
= cache_name_pos(old_name
, strlen(old_name
));
2050 return error("%s: does not exist in index",
2052 ce
= active_cache
[pos
];
2054 struct checkout costate
;
2055 if (errno
!= ENOENT
)
2056 return error("%s: %s", old_name
,
2059 costate
.base_dir
= "";
2060 costate
.base_dir_len
= 0;
2063 costate
.not_new
= 0;
2064 costate
.refresh_cache
= 1;
2065 if (checkout_entry(ce
,
2068 lstat(old_name
, &st
))
2071 if (!cached
&& verify_index_match(ce
, &st
))
2072 return error("%s: does not match index",
2075 st_mode
= ntohl(ce
->ce_mode
);
2076 } else if (stat_ret
< 0)
2077 return error("%s: %s", old_name
, strerror(errno
));
2080 st_mode
= ntohl(ce_mode_from_stat(ce
, st
.st_mode
));
2082 if (patch
->is_new
< 0)
2084 if (!patch
->old_mode
)
2085 patch
->old_mode
= st_mode
;
2086 if ((st_mode
^ patch
->old_mode
) & S_IFMT
)
2087 return error("%s: wrong type", old_name
);
2088 if (st_mode
!= patch
->old_mode
)
2089 fprintf(stderr
, "warning: %s has type %o, expected %o\n",
2090 old_name
, st_mode
, patch
->old_mode
);
2093 if (new_name
&& prev_patch
&& 0 < prev_patch
->is_delete
&&
2094 !strcmp(prev_patch
->old_name
, new_name
))
2095 /* A type-change diff is always split into a patch to
2096 * delete old, immediately followed by a patch to
2097 * create new (see diff.c::run_diff()); in such a case
2098 * it is Ok that the entry to be deleted by the
2099 * previous patch is still in the working tree and in
2107 ((0 < patch
->is_new
) | (0 < patch
->is_rename
) | patch
->is_copy
)) {
2109 cache_name_pos(new_name
, strlen(new_name
)) >= 0 &&
2111 return error("%s: already exists in index", new_name
);
2113 int err
= check_to_create_blob(new_name
, ok_if_exists
);
2117 if (!patch
->new_mode
) {
2118 if (0 < patch
->is_new
)
2119 patch
->new_mode
= S_IFREG
| 0644;
2121 patch
->new_mode
= patch
->old_mode
;
2125 if (new_name
&& old_name
) {
2126 int same
= !strcmp(old_name
, new_name
);
2127 if (!patch
->new_mode
)
2128 patch
->new_mode
= patch
->old_mode
;
2129 if ((patch
->old_mode
^ patch
->new_mode
) & S_IFMT
)
2130 return error("new mode (%o) of %s does not match old mode (%o)%s%s",
2131 patch
->new_mode
, new_name
, patch
->old_mode
,
2132 same
? "" : " of ", same
? "" : old_name
);
2135 if (apply_data(patch
, &st
, ce
) < 0)
2136 return error("%s: patch does not apply", name
);
2137 patch
->rejected
= 0;
2141 static int check_patch_list(struct patch
*patch
)
2143 struct patch
*prev_patch
= NULL
;
2146 for (prev_patch
= NULL
; patch
; patch
= patch
->next
) {
2147 if (apply_verbosely
)
2148 say_patch_name(stderr
,
2149 "Checking patch ", patch
, "...\n");
2150 err
|= check_patch(patch
, prev_patch
);
2156 /* This function tries to read the sha1 from the current index */
2157 static int get_current_sha1(const char *path
, unsigned char *sha1
)
2161 if (read_cache() < 0)
2163 pos
= cache_name_pos(path
, strlen(path
));
2166 hashcpy(sha1
, active_cache
[pos
]->sha1
);
2170 static void show_index_list(struct patch
*list
)
2172 struct patch
*patch
;
2174 /* Once we start supporting the reverse patch, it may be
2175 * worth showing the new sha1 prefix, but until then...
2177 for (patch
= list
; patch
; patch
= patch
->next
) {
2178 const unsigned char *sha1_ptr
;
2179 unsigned char sha1
[20];
2182 name
= patch
->old_name
? patch
->old_name
: patch
->new_name
;
2183 if (0 < patch
->is_new
)
2184 sha1_ptr
= null_sha1
;
2185 else if (get_sha1(patch
->old_sha1_prefix
, sha1
))
2186 /* git diff has no index line for mode/type changes */
2187 if (!patch
->lines_added
&& !patch
->lines_deleted
) {
2188 if (get_current_sha1(patch
->new_name
, sha1
) ||
2189 get_current_sha1(patch
->old_name
, sha1
))
2190 die("mode change for %s, which is not "
2191 "in current HEAD", name
);
2194 die("sha1 information is lacking or useless "
2199 printf("%06o %s ",patch
->old_mode
, sha1_to_hex(sha1_ptr
));
2200 if (line_termination
&& quote_c_style(name
, NULL
, NULL
, 0))
2201 quote_c_style(name
, NULL
, stdout
, 0);
2203 fputs(name
, stdout
);
2204 putchar(line_termination
);
2208 static void stat_patch_list(struct patch
*patch
)
2210 int files
, adds
, dels
;
2212 for (files
= adds
= dels
= 0 ; patch
; patch
= patch
->next
) {
2214 adds
+= patch
->lines_added
;
2215 dels
+= patch
->lines_deleted
;
2219 printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files
, adds
, dels
);
2222 static void numstat_patch_list(struct patch
*patch
)
2224 for ( ; patch
; patch
= patch
->next
) {
2226 name
= patch
->new_name
? patch
->new_name
: patch
->old_name
;
2227 if (patch
->is_binary
)
2231 patch
->lines_added
, patch
->lines_deleted
);
2232 if (line_termination
&& quote_c_style(name
, NULL
, NULL
, 0))
2233 quote_c_style(name
, NULL
, stdout
, 0);
2235 fputs(name
, stdout
);
2236 putchar(line_termination
);
2240 static void show_file_mode_name(const char *newdelete
, unsigned int mode
, const char *name
)
2243 printf(" %s mode %06o %s\n", newdelete
, mode
, name
);
2245 printf(" %s %s\n", newdelete
, name
);
2248 static void show_mode_change(struct patch
*p
, int show_name
)
2250 if (p
->old_mode
&& p
->new_mode
&& p
->old_mode
!= p
->new_mode
) {
2252 printf(" mode change %06o => %06o %s\n",
2253 p
->old_mode
, p
->new_mode
, p
->new_name
);
2255 printf(" mode change %06o => %06o\n",
2256 p
->old_mode
, p
->new_mode
);
2260 static void show_rename_copy(struct patch
*p
)
2262 const char *renamecopy
= p
->is_rename
? "rename" : "copy";
2263 const char *old
, *new;
2265 /* Find common prefix */
2269 const char *slash_old
, *slash_new
;
2270 slash_old
= strchr(old
, '/');
2271 slash_new
= strchr(new, '/');
2274 slash_old
- old
!= slash_new
- new ||
2275 memcmp(old
, new, slash_new
- new))
2277 old
= slash_old
+ 1;
2278 new = slash_new
+ 1;
2280 /* p->old_name thru old is the common prefix, and old and new
2281 * through the end of names are renames
2283 if (old
!= p
->old_name
)
2284 printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy
,
2285 (int)(old
- p
->old_name
), p
->old_name
,
2286 old
, new, p
->score
);
2288 printf(" %s %s => %s (%d%%)\n", renamecopy
,
2289 p
->old_name
, p
->new_name
, p
->score
);
2290 show_mode_change(p
, 0);
2293 static void summary_patch_list(struct patch
*patch
)
2297 for (p
= patch
; p
; p
= p
->next
) {
2299 show_file_mode_name("create", p
->new_mode
, p
->new_name
);
2300 else if (p
->is_delete
)
2301 show_file_mode_name("delete", p
->old_mode
, p
->old_name
);
2303 if (p
->is_rename
|| p
->is_copy
)
2304 show_rename_copy(p
);
2307 printf(" rewrite %s (%d%%)\n",
2308 p
->new_name
, p
->score
);
2309 show_mode_change(p
, 0);
2312 show_mode_change(p
, 1);
2318 static void patch_stats(struct patch
*patch
)
2320 int lines
= patch
->lines_added
+ patch
->lines_deleted
;
2322 if (lines
> max_change
)
2324 if (patch
->old_name
) {
2325 int len
= quote_c_style(patch
->old_name
, NULL
, NULL
, 0);
2327 len
= strlen(patch
->old_name
);
2331 if (patch
->new_name
) {
2332 int len
= quote_c_style(patch
->new_name
, NULL
, NULL
, 0);
2334 len
= strlen(patch
->new_name
);
2340 static void remove_file(struct patch
*patch
, int rmdir_empty
)
2343 if (remove_file_from_cache(patch
->old_name
) < 0)
2344 die("unable to remove %s from index", patch
->old_name
);
2347 if (S_ISGITLINK(patch
->old_mode
)) {
2348 if (rmdir(patch
->old_name
))
2349 warning("unable to remove submodule %s",
2351 } else if (!unlink(patch
->old_name
) && rmdir_empty
) {
2352 char *name
= xstrdup(patch
->old_name
);
2353 char *end
= strrchr(name
, '/');
2358 end
= strrchr(name
, '/');
2365 static void add_index_file(const char *path
, unsigned mode
, void *buf
, unsigned long size
)
2368 struct cache_entry
*ce
;
2369 int namelen
= strlen(path
);
2370 unsigned ce_size
= cache_entry_size(namelen
);
2375 ce
= xcalloc(1, ce_size
);
2376 memcpy(ce
->name
, path
, namelen
);
2377 ce
->ce_mode
= create_ce_mode(mode
);
2378 ce
->ce_flags
= htons(namelen
);
2379 if (S_ISGITLINK(mode
)) {
2380 const char *s
= buf
;
2382 if (get_sha1_hex(s
+ strlen("Subproject commit "), ce
->sha1
))
2383 die("corrupt patch for subproject %s", path
);
2386 if (lstat(path
, &st
) < 0)
2387 die("unable to stat newly created file %s",
2389 fill_stat_cache_info(ce
, &st
);
2391 if (write_sha1_file(buf
, size
, blob_type
, ce
->sha1
) < 0)
2392 die("unable to create backing store for newly created file %s", path
);
2394 if (add_cache_entry(ce
, ADD_CACHE_OK_TO_ADD
) < 0)
2395 die("unable to add cache entry for %s", path
);
2398 static int try_create_file(const char *path
, unsigned int mode
, const char *buf
, unsigned long size
)
2403 if (S_ISGITLINK(mode
)) {
2405 if (!lstat(path
, &st
) && S_ISDIR(st
.st_mode
))
2407 return mkdir(path
, 0777);
2410 if (has_symlinks
&& S_ISLNK(mode
))
2411 /* Although buf:size is counted string, it also is NUL
2414 return symlink(buf
, path
);
2416 fd
= open(path
, O_CREAT
| O_EXCL
| O_WRONLY
, (mode
& 0100) ? 0777 : 0666);
2420 strbuf_init(&nbuf
, 0);
2421 if (convert_to_working_tree(path
, buf
, size
, &nbuf
)) {
2425 write_or_die(fd
, buf
, size
);
2426 strbuf_release(&nbuf
);
2429 die("closing file %s: %s", path
, strerror(errno
));
2434 * We optimistically assume that the directories exist,
2435 * which is true 99% of the time anyway. If they don't,
2436 * we create them and try again.
2438 static void create_one_file(char *path
, unsigned mode
, const char *buf
, unsigned long size
)
2442 if (!try_create_file(path
, mode
, buf
, size
))
2445 if (errno
== ENOENT
) {
2446 if (safe_create_leading_directories(path
))
2448 if (!try_create_file(path
, mode
, buf
, size
))
2452 if (errno
== EEXIST
|| errno
== EACCES
) {
2453 /* We may be trying to create a file where a directory
2457 if (!lstat(path
, &st
) && (!S_ISDIR(st
.st_mode
) || !rmdir(path
)))
2461 if (errno
== EEXIST
) {
2462 unsigned int nr
= getpid();
2465 const char *newpath
;
2466 newpath
= mkpath("%s~%u", path
, nr
);
2467 if (!try_create_file(newpath
, mode
, buf
, size
)) {
2468 if (!rename(newpath
, path
))
2473 if (errno
!= EEXIST
)
2478 die("unable to write file %s mode %o", path
, mode
);
2481 static void create_file(struct patch
*patch
)
2483 char *path
= patch
->new_name
;
2484 unsigned mode
= patch
->new_mode
;
2485 unsigned long size
= patch
->resultsize
;
2486 char *buf
= patch
->result
;
2489 mode
= S_IFREG
| 0644;
2490 create_one_file(path
, mode
, buf
, size
);
2491 add_index_file(path
, mode
, buf
, size
);
2494 /* phase zero is to remove, phase one is to create */
2495 static void write_out_one_result(struct patch
*patch
, int phase
)
2497 if (patch
->is_delete
> 0) {
2499 remove_file(patch
, 1);
2502 if (patch
->is_new
> 0 || patch
->is_copy
) {
2508 * Rename or modification boils down to the same
2509 * thing: remove the old, write the new
2512 remove_file(patch
, patch
->is_rename
);
2517 static int write_out_one_reject(struct patch
*patch
)
2520 char namebuf
[PATH_MAX
];
2521 struct fragment
*frag
;
2524 for (cnt
= 0, frag
= patch
->fragments
; frag
; frag
= frag
->next
) {
2525 if (!frag
->rejected
)
2531 if (apply_verbosely
)
2532 say_patch_name(stderr
,
2533 "Applied patch ", patch
, " cleanly.\n");
2537 /* This should not happen, because a removal patch that leaves
2538 * contents are marked "rejected" at the patch level.
2540 if (!patch
->new_name
)
2541 die("internal error");
2543 /* Say this even without --verbose */
2544 say_patch_name(stderr
, "Applying patch ", patch
, " with");
2545 fprintf(stderr
, " %d rejects...\n", cnt
);
2547 cnt
= strlen(patch
->new_name
);
2548 if (ARRAY_SIZE(namebuf
) <= cnt
+ 5) {
2549 cnt
= ARRAY_SIZE(namebuf
) - 5;
2551 "warning: truncating .rej filename to %.*s.rej",
2552 cnt
- 1, patch
->new_name
);
2554 memcpy(namebuf
, patch
->new_name
, cnt
);
2555 memcpy(namebuf
+ cnt
, ".rej", 5);
2557 rej
= fopen(namebuf
, "w");
2559 return error("cannot open %s: %s", namebuf
, strerror(errno
));
2561 /* Normal git tools never deal with .rej, so do not pretend
2562 * this is a git patch by saying --git nor give extended
2563 * headers. While at it, maybe please "kompare" that wants
2564 * the trailing TAB and some garbage at the end of line ;-).
2566 fprintf(rej
, "diff a/%s b/%s\t(rejected hunks)\n",
2567 patch
->new_name
, patch
->new_name
);
2568 for (cnt
= 1, frag
= patch
->fragments
;
2570 cnt
++, frag
= frag
->next
) {
2571 if (!frag
->rejected
) {
2572 fprintf(stderr
, "Hunk #%d applied cleanly.\n", cnt
);
2575 fprintf(stderr
, "Rejected hunk #%d.\n", cnt
);
2576 fprintf(rej
, "%.*s", frag
->size
, frag
->patch
);
2577 if (frag
->patch
[frag
->size
-1] != '\n')
2584 static int write_out_results(struct patch
*list
, int skipped_patch
)
2590 if (!list
&& !skipped_patch
)
2591 return error("No changes");
2593 for (phase
= 0; phase
< 2; phase
++) {
2599 write_out_one_result(l
, phase
);
2600 if (phase
== 1 && write_out_one_reject(l
))
2609 static struct lock_file lock_file
;
2611 static struct excludes
{
2612 struct excludes
*next
;
2616 static int use_patch(struct patch
*p
)
2618 const char *pathname
= p
->new_name
? p
->new_name
: p
->old_name
;
2619 struct excludes
*x
= excludes
;
2621 if (fnmatch(x
->path
, pathname
, 0) == 0)
2625 if (0 < prefix_length
) {
2626 int pathlen
= strlen(pathname
);
2627 if (pathlen
<= prefix_length
||
2628 memcmp(prefix
, pathname
, prefix_length
))
2634 static void prefix_one(char **name
)
2636 char *old_name
= *name
;
2639 *name
= xstrdup(prefix_filename(prefix
, prefix_length
, *name
));
2643 static void prefix_patches(struct patch
*p
)
2645 if (!prefix
|| p
->is_toplevel_relative
)
2647 for ( ; p
; p
= p
->next
) {
2648 if (p
->new_name
== p
->old_name
) {
2649 char *prefixed
= p
->new_name
;
2650 prefix_one(&prefixed
);
2651 p
->new_name
= p
->old_name
= prefixed
;
2654 prefix_one(&p
->new_name
);
2655 prefix_one(&p
->old_name
);
2660 static int apply_patch(int fd
, const char *filename
, int inaccurate_eof
)
2662 unsigned long offset
, size
;
2663 char *buffer
= read_patch_file(fd
, &size
);
2664 struct patch
*list
= NULL
, **listp
= &list
;
2665 int skipped_patch
= 0;
2667 patch_input_file
= filename
;
2672 struct patch
*patch
;
2675 patch
= xcalloc(1, sizeof(*patch
));
2676 patch
->inaccurate_eof
= inaccurate_eof
;
2677 nr
= parse_chunk(buffer
+ offset
, size
, patch
);
2680 if (apply_in_reverse
)
2681 reverse_patches(patch
);
2683 prefix_patches(patch
);
2684 if (use_patch(patch
)) {
2687 listp
= &patch
->next
;
2690 /* perhaps free it a bit better? */
2698 if (whitespace_error
&& (new_whitespace
== error_on_whitespace
))
2701 update_index
= check_index
&& apply
;
2702 if (update_index
&& newfd
< 0)
2703 newfd
= hold_locked_index(&lock_file
, 1);
2706 if (read_cache() < 0)
2707 die("unable to read index file");
2710 if ((check
|| apply
) &&
2711 check_patch_list(list
) < 0 &&
2715 if (apply
&& write_out_results(list
, skipped_patch
))
2718 if (show_index_info
)
2719 show_index_list(list
);
2722 stat_patch_list(list
);
2725 numstat_patch_list(list
);
2728 summary_patch_list(list
);
2734 static int git_apply_config(const char *var
, const char *value
)
2736 if (!strcmp(var
, "apply.whitespace")) {
2737 apply_default_whitespace
= xstrdup(value
);
2740 return git_default_config(var
, value
);
2744 int cmd_apply(int argc
, const char **argv
, const char *unused_prefix
)
2748 int inaccurate_eof
= 0;
2750 int is_not_gitdir
= 0;
2752 const char *whitespace_option
= NULL
;
2754 prefix
= setup_git_directory_gently(&is_not_gitdir
);
2755 prefix_length
= prefix
? strlen(prefix
) : 0;
2756 git_config(git_apply_config
);
2757 if (apply_default_whitespace
)
2758 parse_whitespace_option(apply_default_whitespace
);
2760 for (i
= 1; i
< argc
; i
++) {
2761 const char *arg
= argv
[i
];
2765 if (!strcmp(arg
, "-")) {
2766 errs
|= apply_patch(0, "<stdin>", inaccurate_eof
);
2770 if (!prefixcmp(arg
, "--exclude=")) {
2771 struct excludes
*x
= xmalloc(sizeof(*x
));
2777 if (!prefixcmp(arg
, "-p")) {
2778 p_value
= atoi(arg
+ 2);
2782 if (!strcmp(arg
, "--no-add")) {
2786 if (!strcmp(arg
, "--stat")) {
2791 if (!strcmp(arg
, "--allow-binary-replacement") ||
2792 !strcmp(arg
, "--binary")) {
2793 continue; /* now no-op */
2795 if (!strcmp(arg
, "--numstat")) {
2800 if (!strcmp(arg
, "--summary")) {
2805 if (!strcmp(arg
, "--check")) {
2810 if (!strcmp(arg
, "--index")) {
2812 die("--index outside a repository");
2816 if (!strcmp(arg
, "--cached")) {
2818 die("--cached outside a repository");
2823 if (!strcmp(arg
, "--apply")) {
2827 if (!strcmp(arg
, "--index-info")) {
2829 show_index_info
= 1;
2832 if (!strcmp(arg
, "-z")) {
2833 line_termination
= 0;
2836 if (!prefixcmp(arg
, "-C")) {
2837 p_context
= strtoul(arg
+ 2, &end
, 0);
2839 die("unrecognized context count '%s'", arg
+ 2);
2842 if (!prefixcmp(arg
, "--whitespace=")) {
2843 whitespace_option
= arg
+ 13;
2844 parse_whitespace_option(arg
+ 13);
2847 if (!strcmp(arg
, "-R") || !strcmp(arg
, "--reverse")) {
2848 apply_in_reverse
= 1;
2851 if (!strcmp(arg
, "--unidiff-zero")) {
2855 if (!strcmp(arg
, "--reject")) {
2856 apply
= apply_with_reject
= apply_verbosely
= 1;
2859 if (!strcmp(arg
, "-v") || !strcmp(arg
, "--verbose")) {
2860 apply_verbosely
= 1;
2863 if (!strcmp(arg
, "--inaccurate-eof")) {
2867 if (0 < prefix_length
)
2868 arg
= prefix_filename(prefix
, prefix_length
, arg
);
2870 fd
= open(arg
, O_RDONLY
);
2874 set_default_whitespace_mode(whitespace_option
);
2875 errs
|= apply_patch(fd
, arg
, inaccurate_eof
);
2878 set_default_whitespace_mode(whitespace_option
);
2880 errs
|= apply_patch(0, "<stdin>", inaccurate_eof
);
2881 if (whitespace_error
) {
2882 if (squelch_whitespace_errors
&&
2883 squelch_whitespace_errors
< whitespace_error
) {
2885 whitespace_error
- squelch_whitespace_errors
;
2886 fprintf(stderr
, "warning: squelched %d "
2887 "whitespace error%s\n",
2889 squelched
== 1 ? "" : "s");
2891 if (new_whitespace
== error_on_whitespace
)
2892 die("%d line%s add%s whitespace errors.",
2894 whitespace_error
== 1 ? "" : "s",
2895 whitespace_error
== 1 ? "s" : "");
2896 if (applied_after_fixing_ws
)
2897 fprintf(stderr
, "warning: %d line%s applied after"
2898 " fixing whitespace errors.\n",
2899 applied_after_fixing_ws
,
2900 applied_after_fixing_ws
== 1 ? "" : "s");
2901 else if (whitespace_error
)
2902 fprintf(stderr
, "warning: %d line%s add%s whitespace errors.\n",
2904 whitespace_error
== 1 ? "" : "s",
2905 whitespace_error
== 1 ? "s" : "");
2909 if (write_cache(newfd
, active_cache
, active_nr
) ||
2910 close(newfd
) || commit_locked_index(&lock_file
))
2911 die("Unable to write new index file");