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 const char *fake_ancestor;
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|fix|error|error-all>] <patch>...";
50 static enum ws_error_action {
55 } ws_error_action = warn_on_ws_error;
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 ws_error_action = warn_on_ws_error;
67 if (!strcmp(option, "warn")) {
68 ws_error_action = warn_on_ws_error;
71 if (!strcmp(option, "nowarn")) {
72 ws_error_action = nowarn_ws_error;
75 if (!strcmp(option, "error")) {
76 ws_error_action = die_on_ws_error;
79 if (!strcmp(option, "error-all")) {
80 ws_error_action = die_on_ws_error;
81 squelch_whitespace_errors = 0;
84 if (!strcmp(option, "strip") || !strcmp(option, "fix")) {
85 ws_error_action = correct_ws_error;
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 ws_error_action = (apply ? warn_on_ws_error : nowarn_ws_error);
98 * For "diff-stat" like behaviour, we keep track of the biggest change
99 * we've seen, and the longest filename. That allows us to do simple
102 static int max_change, max_len;
105 * Various "current state", notably line numbers and what
106 * file (and how) we're patching right now.. The "is_xxxx"
107 * things are flags, where -1 means "don't know yet".
109 static int linenr = 1;
112 * This represents one "hunk" from a patch, starting with
113 * "@@ -oldpos,oldlines +newpos,newlines @@" marker. The
114 * patch text is pointed at by patch, and its byte length
115 * is stored in size. leading and trailing are the number
119 unsigned long leading, trailing;
120 unsigned long oldpos, oldlines;
121 unsigned long newpos, newlines;
125 struct fragment *next;
129 * When dealing with a binary patch, we reuse "leading" field
130 * to store the type of the binary hunk, either deflated "delta"
131 * or deflated "literal".
133 #define binary_patch_method leading
134 #define BINARY_DELTA_DEFLATED 1
135 #define BINARY_LITERAL_DEFLATED 2
138 * This represents a "patch" to a file, both metainfo changes
139 * such as creation/deletion, filemode and content changes represented
140 * as a series of fragments.
143 char *new_name, *old_name, *def_name;
144 unsigned int old_mode, new_mode;
145 int is_new, is_delete; /* -1 = unknown, 0 = false, 1 = true */
147 unsigned long deflate_origlen;
148 int lines_added, lines_deleted;
150 unsigned int is_toplevel_relative:1;
151 unsigned int inaccurate_eof:1;
152 unsigned int is_binary:1;
153 unsigned int is_copy:1;
154 unsigned int is_rename:1;
155 struct fragment *fragments;
158 char old_sha1_prefix[41];
159 char new_sha1_prefix[41];
163 static void say_patch_name(FILE *output, const char *pre,
164 struct patch *patch, const char *post)
167 if (patch->old_name && patch->new_name &&
168 strcmp(patch->old_name, patch->new_name)) {
169 quote_c_style(patch->old_name, NULL, output, 0);
170 fputs(" => ", output);
171 quote_c_style(patch->new_name, NULL, output, 0);
173 const char *n = patch->new_name;
176 quote_c_style(n, NULL, output, 0);
181 #define CHUNKSIZE (8192)
184 static void read_patch_file(struct strbuf *sb, int fd)
186 if (strbuf_read(sb, fd, 0) < 0)
187 die("git-apply: read returned %s", strerror(errno));
190 * Make sure that we have some slop in the buffer
191 * so that we can do speculative "memcmp" etc, and
192 * see to it that it is NUL-filled.
194 strbuf_grow(sb, SLOP);
195 memset(sb->buf + sb->len, 0, SLOP);
198 static unsigned long linelen(const char *buffer, unsigned long size)
200 unsigned long len = 0;
203 if (*buffer++ == '\n')
209 static int is_dev_null(const char *str)
211 return !memcmp("/dev/null", str, 9) && isspace(str[9]);
217 static int name_terminate(const char *name, int namelen, int c, int terminate)
219 if (c == ' ' && !(terminate & TERM_SPACE))
221 if (c == '\t' && !(terminate & TERM_TAB))
227 static char *find_name(const char *line, char *def, int p_value, int terminate)
230 const char *start = line;
236 * Proposed "new-style" GNU patch/diff format; see
237 * http://marc.theaimsgroup.com/?l=git&m=112927316408690&w=2
239 strbuf_init(&name, 0);
240 if (!unquote_c_style(&name, line, NULL)) {
243 for (cp = name.buf; p_value; p_value--) {
244 cp = strchr(cp, '/');
250 /* name can later be freed, so we need
251 * to memmove, not just return cp
253 strbuf_remove(&name, 0, cp - name.buf);
255 return strbuf_detach(&name, NULL);
258 strbuf_release(&name);
267 if (name_terminate(start, line-start, c, terminate))
271 if (c == '/' && !--p_value)
281 * Generally we prefer the shorter name, especially
282 * if the other one is just a variation of that with
283 * something else tacked on to the end (ie "file.orig"
287 int deflen = strlen(def);
288 if (deflen < len && !strncmp(start, def, deflen))
293 return xmemdupz(start, len);
296 static int count_slashes(const char *cp)
308 * Given the string after "--- " or "+++ ", guess the appropriate
309 * p_value for the given patch.
311 static int guess_p_value(const char *nameline)
316 if (is_dev_null(nameline))
318 name = find_name(nameline, NULL, 0, TERM_SPACE | TERM_TAB);
321 cp = strchr(name, '/');
326 * Does it begin with "a/$our-prefix" and such? Then this is
327 * very likely to apply to our directory.
329 if (!strncmp(name, prefix, prefix_length))
330 val = count_slashes(prefix);
333 if (!strncmp(cp, prefix, prefix_length))
334 val = count_slashes(prefix) + 1;
342 * Get the name etc info from the --/+++ lines of a traditional patch header
344 * FIXME! The end-of-filename heuristics are kind of screwy. For existing
345 * files, we can happily check the index for a match, but for creating a
346 * new file we should try to match whatever "patch" does. I have no idea.
348 static void parse_traditional_patch(const char *first, const char *second, struct patch *patch)
352 first += 4; /* skip "--- " */
353 second += 4; /* skip "+++ " */
354 if (!p_value_known) {
356 p = guess_p_value(first);
357 q = guess_p_value(second);
359 if (0 <= p && p == q) {
364 if (is_dev_null(first)) {
366 patch->is_delete = 0;
367 name = find_name(second, NULL, p_value, TERM_SPACE | TERM_TAB);
368 patch->new_name = name;
369 } else if (is_dev_null(second)) {
371 patch->is_delete = 1;
372 name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
373 patch->old_name = name;
375 name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
376 name = find_name(second, name, p_value, TERM_SPACE | TERM_TAB);
377 patch->old_name = patch->new_name = name;
380 die("unable to find filename in patch at line %d", linenr);
383 static int gitdiff_hdrend(const char *line, struct patch *patch)
389 * We're anal about diff header consistency, to make
390 * sure that we don't end up having strange ambiguous
391 * patches floating around.
393 * As a result, gitdiff_{old|new}name() will check
394 * their names against any previous information, just
397 static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, const char *oldnew)
399 if (!orig_name && !isnull)
400 return find_name(line, NULL, p_value, TERM_TAB);
409 die("git-apply: bad git-diff - expected /dev/null, got %s on line %d", name, linenr);
410 another = find_name(line, NULL, p_value, TERM_TAB);
411 if (!another || memcmp(another, name, len))
412 die("git-apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr);
417 /* expect "/dev/null" */
418 if (memcmp("/dev/null", line, 9) || line[9] != '\n')
419 die("git-apply: bad git-diff - expected /dev/null on line %d", linenr);
424 static int gitdiff_oldname(const char *line, struct patch *patch)
426 patch->old_name = gitdiff_verify_name(line, patch->is_new, patch->old_name, "old");
430 static int gitdiff_newname(const char *line, struct patch *patch)
432 patch->new_name = gitdiff_verify_name(line, patch->is_delete, patch->new_name, "new");
436 static int gitdiff_oldmode(const char *line, struct patch *patch)
438 patch->old_mode = strtoul(line, NULL, 8);
442 static int gitdiff_newmode(const char *line, struct patch *patch)
444 patch->new_mode = strtoul(line, NULL, 8);
448 static int gitdiff_delete(const char *line, struct patch *patch)
450 patch->is_delete = 1;
451 patch->old_name = patch->def_name;
452 return gitdiff_oldmode(line, patch);
455 static int gitdiff_newfile(const char *line, struct patch *patch)
458 patch->new_name = patch->def_name;
459 return gitdiff_newmode(line, patch);
462 static int gitdiff_copysrc(const char *line, struct patch *patch)
465 patch->old_name = find_name(line, NULL, 0, 0);
469 static int gitdiff_copydst(const char *line, struct patch *patch)
472 patch->new_name = find_name(line, NULL, 0, 0);
476 static int gitdiff_renamesrc(const char *line, struct patch *patch)
478 patch->is_rename = 1;
479 patch->old_name = find_name(line, NULL, 0, 0);
483 static int gitdiff_renamedst(const char *line, struct patch *patch)
485 patch->is_rename = 1;
486 patch->new_name = find_name(line, NULL, 0, 0);
490 static int gitdiff_similarity(const char *line, struct patch *patch)
492 if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
497 static int gitdiff_dissimilarity(const char *line, struct patch *patch)
499 if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
504 static int gitdiff_index(const char *line, struct patch *patch)
507 * index line is N hexadecimal, "..", N hexadecimal,
508 * and optional space with octal mode.
510 const char *ptr, *eol;
513 ptr = strchr(line, '.');
514 if (!ptr || ptr[1] != '.' || 40 < ptr - line)
517 memcpy(patch->old_sha1_prefix, line, len);
518 patch->old_sha1_prefix[len] = 0;
521 ptr = strchr(line, ' ');
522 eol = strchr(line, '\n');
524 if (!ptr || eol < ptr)
530 memcpy(patch->new_sha1_prefix, line, len);
531 patch->new_sha1_prefix[len] = 0;
533 patch->new_mode = patch->old_mode = strtoul(ptr+1, NULL, 8);
538 * This is normal for a diff that doesn't change anything: we'll fall through
539 * into the next diff. Tell the parser to break out.
541 static int gitdiff_unrecognized(const char *line, struct patch *patch)
546 static const char *stop_at_slash(const char *line, int llen)
550 for (i = 0; i < llen; i++) {
559 * This is to extract the same name that appears on "diff --git"
560 * line. We do not find and return anything if it is a rename
561 * patch, and it is OK because we will find the name elsewhere.
562 * We need to reliably find name only when it is mode-change only,
563 * creation or deletion of an empty file. In any of these cases,
564 * both sides are the same name under a/ and b/ respectively.
566 static char *git_header_name(char *line, int llen)
569 const char *second = NULL;
572 line += strlen("diff --git ");
573 llen -= strlen("diff --git ");
580 strbuf_init(&first, 0);
583 if (unquote_c_style(&first, line, &second))
586 /* advance to the first slash */
587 cp = stop_at_slash(first.buf, first.len);
588 /* we do not accept absolute paths */
589 if (!cp || cp == first.buf)
591 strbuf_remove(&first, 0, cp + 1 - first.buf);
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)
602 if (*second == '"') {
603 if (unquote_c_style(&sp, second, NULL))
605 cp = stop_at_slash(sp.buf, sp.len);
606 if (!cp || cp == sp.buf)
608 /* They must match, otherwise ignore */
609 if (strcmp(cp + 1, first.buf))
612 return strbuf_detach(&first, NULL);
615 /* unquoted second */
616 cp = stop_at_slash(second, line + llen - second);
617 if (!cp || cp == second)
620 if (line + llen - cp != first.len + 1 ||
621 memcmp(first.buf, cp, first.len))
623 return strbuf_detach(&first, NULL);
626 strbuf_release(&first);
631 /* unquoted first name */
632 name = stop_at_slash(line, llen);
633 if (!name || name == line)
638 * since the first name is unquoted, a dq if exists must be
639 * the beginning of the second name.
641 for (second = name; second < line + llen; second++) {
642 if (*second == '"') {
647 if (unquote_c_style(&sp, second, NULL))
650 np = stop_at_slash(sp.buf, sp.len);
651 if (!np || np == sp.buf)
655 len = sp.buf + sp.len - np;
656 if (len < second - name &&
657 !strncmp(np, name, len) &&
658 isspace(name[len])) {
660 strbuf_remove(&sp, 0, np - sp.buf);
661 return strbuf_detach(&sp, NULL);
671 * Accept a name only if it shows up twice, exactly the same
674 for (len = 0 ; ; len++) {
689 if (second[len] == '\n' && !memcmp(name, second, len)) {
690 return xmemdupz(name, len);
697 /* Verify that we recognize the lines following a git header */
698 static int parse_git_header(char *line, int len, unsigned int size, struct patch *patch)
700 unsigned long offset;
702 /* A git diff has explicit new/delete information, so we don't guess */
704 patch->is_delete = 0;
707 * Some things may not have the old name in the
708 * rest of the headers anywhere (pure mode changes,
709 * or removing or adding empty files), so we get
710 * the default name from the header.
712 patch->def_name = git_header_name(line, len);
717 for (offset = len ; size > 0 ; offset += len, size -= len, line += len, linenr++) {
718 static const struct opentry {
720 int (*fn)(const char *, struct patch *);
722 { "@@ -", gitdiff_hdrend },
723 { "--- ", gitdiff_oldname },
724 { "+++ ", gitdiff_newname },
725 { "old mode ", gitdiff_oldmode },
726 { "new mode ", gitdiff_newmode },
727 { "deleted file mode ", gitdiff_delete },
728 { "new file mode ", gitdiff_newfile },
729 { "copy from ", gitdiff_copysrc },
730 { "copy to ", gitdiff_copydst },
731 { "rename old ", gitdiff_renamesrc },
732 { "rename new ", gitdiff_renamedst },
733 { "rename from ", gitdiff_renamesrc },
734 { "rename to ", gitdiff_renamedst },
735 { "similarity index ", gitdiff_similarity },
736 { "dissimilarity index ", gitdiff_dissimilarity },
737 { "index ", gitdiff_index },
738 { "", gitdiff_unrecognized },
742 len = linelen(line, size);
743 if (!len || line[len-1] != '\n')
745 for (i = 0; i < ARRAY_SIZE(optable); i++) {
746 const struct opentry *p = optable + i;
747 int oplen = strlen(p->str);
748 if (len < oplen || memcmp(p->str, line, oplen))
750 if (p->fn(line + oplen, patch) < 0)
759 static int parse_num(const char *line, unsigned long *p)
765 *p = strtoul(line, &ptr, 10);
769 static int parse_range(const char *line, int len, int offset, const char *expect,
770 unsigned long *p1, unsigned long *p2)
774 if (offset < 0 || offset >= len)
779 digits = parse_num(line, p1);
789 digits = parse_num(line+1, p2);
801 if (memcmp(line, expect, ex))
808 * Parse a unified diff fragment header of the
809 * form "@@ -a,b +c,d @@"
811 static int parse_fragment_header(char *line, int len, struct fragment *fragment)
815 if (!len || line[len-1] != '\n')
818 /* Figure out the number of lines in a fragment */
819 offset = parse_range(line, len, 4, " +", &fragment->oldpos, &fragment->oldlines);
820 offset = parse_range(line, len, offset, " @@", &fragment->newpos, &fragment->newlines);
825 static int find_header(char *line, unsigned long size, int *hdrsize, struct patch *patch)
827 unsigned long offset, len;
829 patch->is_toplevel_relative = 0;
830 patch->is_rename = patch->is_copy = 0;
831 patch->is_new = patch->is_delete = -1;
832 patch->old_mode = patch->new_mode = 0;
833 patch->old_name = patch->new_name = NULL;
834 for (offset = 0; size > 0; offset += len, size -= len, line += len, linenr++) {
835 unsigned long nextlen;
837 len = linelen(line, size);
841 /* Testing this early allows us to take a few shortcuts.. */
846 * Make sure we don't find any unconnected patch fragments.
847 * That's a sign that we didn't find a header, and that a
848 * patch has become corrupted/broken up.
850 if (!memcmp("@@ -", line, 4)) {
851 struct fragment dummy;
852 if (parse_fragment_header(line, len, &dummy) < 0)
854 die("patch fragment without header at line %d: %.*s",
855 linenr, (int)len-1, line);
862 * Git patch? It might not have a real patch, just a rename
863 * or mode change, so we handle that specially
865 if (!memcmp("diff --git ", line, 11)) {
866 int git_hdr_len = parse_git_header(line, len, size, patch);
867 if (git_hdr_len <= len)
869 if (!patch->old_name && !patch->new_name) {
870 if (!patch->def_name)
871 die("git diff header lacks filename information (line %d)", linenr);
872 patch->old_name = patch->new_name = patch->def_name;
874 patch->is_toplevel_relative = 1;
875 *hdrsize = git_hdr_len;
879 /* --- followed by +++ ? */
880 if (memcmp("--- ", line, 4) || memcmp("+++ ", line + len, 4))
884 * We only accept unified patches, so we want it to
885 * at least have "@@ -a,b +c,d @@\n", which is 14 chars
886 * minimum ("@@ -0,0 +1 @@\n" is the shortest).
888 nextlen = linelen(line + len, size - len);
889 if (size < nextlen + 14 || memcmp("@@ -", line + len + nextlen, 4))
892 /* Ok, we'll consider it a patch */
893 parse_traditional_patch(line, line+len, patch);
894 *hdrsize = len + nextlen;
901 static void check_whitespace(const char *line, int len)
903 const char *err = "Adds trailing whitespace";
908 * We know len is at least two, since we have a '+' and we
909 * checked that the last character was a '\n' before calling
910 * this function. That is, an addition of an empty line would
911 * check the '+' here. Sneaky...
913 if ((whitespace_rule & WS_TRAILING_SPACE) && isspace(line[len-2]))
917 * Make sure that there is no space followed by a tab in
920 if (whitespace_rule & WS_SPACE_BEFORE_TAB) {
921 err = "Space in indent is followed by a tab";
922 for (i = 1; i < len; i++) {
923 if (line[i] == '\t') {
927 else if (line[i] == ' ')
935 * Make sure that the indentation does not contain more than
938 if ((whitespace_rule & WS_INDENT_WITH_NON_TAB) &&
939 (8 < len) && !strncmp("+ ", line, 9)) {
940 err = "Indent more than 8 places with spaces";
947 if (squelch_whitespace_errors &&
948 squelch_whitespace_errors < whitespace_error)
951 fprintf(stderr, "%s.\n%s:%d:%.*s\n",
952 err, patch_input_file, linenr, len-2, line+1);
956 * Parse a unified diff. Note that this really needs to parse each
957 * fragment separately, since the only way to know the difference
958 * between a "---" that is part of a patch, and a "---" that starts
959 * the next patch is to look at the line counts..
961 static int parse_fragment(char *line, unsigned long size,
962 struct patch *patch, struct fragment *fragment)
965 int len = linelen(line, size), offset;
966 unsigned long oldlines, newlines;
967 unsigned long leading, trailing;
969 offset = parse_fragment_header(line, len, fragment);
972 oldlines = fragment->oldlines;
973 newlines = fragment->newlines;
977 /* Parse the thing.. */
984 offset += len, size -= len, line += len, linenr++) {
985 if (!oldlines && !newlines)
987 len = linelen(line, size);
988 if (!len || line[len-1] != '\n')
993 case '\n': /* newer GNU diff, an empty context line */
997 if (!deleted && !added)
1002 if (apply_in_reverse &&
1003 ws_error_action != nowarn_ws_error)
1004 check_whitespace(line, len);
1010 if (!apply_in_reverse &&
1011 ws_error_action != nowarn_ws_error)
1012 check_whitespace(line, len);
1019 * We allow "\ No newline at end of file". Depending
1020 * on locale settings when the patch was produced we
1021 * don't know what this line looks like. The only
1022 * thing we do know is that it begins with "\ ".
1023 * Checking for 12 is just for sanity check -- any
1024 * l10n of "\ No newline..." is at least that long.
1027 if (len < 12 || memcmp(line, "\\ ", 2))
1032 if (oldlines || newlines)
1034 fragment->leading = leading;
1035 fragment->trailing = trailing;
1038 * If a fragment ends with an incomplete line, we failed to include
1039 * it in the above loop because we hit oldlines == newlines == 0
1042 if (12 < size && !memcmp(line, "\\ ", 2))
1043 offset += linelen(line, size);
1045 patch->lines_added += added;
1046 patch->lines_deleted += deleted;
1048 if (0 < patch->is_new && oldlines)
1049 return error("new file depends on old contents");
1050 if (0 < patch->is_delete && newlines)
1051 return error("deleted file still has contents");
1055 static int parse_single_patch(char *line, unsigned long size, struct patch *patch)
1057 unsigned long offset = 0;
1058 unsigned long oldlines = 0, newlines = 0, context = 0;
1059 struct fragment **fragp = &patch->fragments;
1061 while (size > 4 && !memcmp(line, "@@ -", 4)) {
1062 struct fragment *fragment;
1065 fragment = xcalloc(1, sizeof(*fragment));
1066 len = parse_fragment(line, size, patch, fragment);
1068 die("corrupt patch at line %d", linenr);
1069 fragment->patch = line;
1070 fragment->size = len;
1071 oldlines += fragment->oldlines;
1072 newlines += fragment->newlines;
1073 context += fragment->leading + fragment->trailing;
1076 fragp = &fragment->next;
1084 * If something was removed (i.e. we have old-lines) it cannot
1085 * be creation, and if something was added it cannot be
1086 * deletion. However, the reverse is not true; --unified=0
1087 * patches that only add are not necessarily creation even
1088 * though they do not have any old lines, and ones that only
1089 * delete are not necessarily deletion.
1091 * Unfortunately, a real creation/deletion patch do _not_ have
1092 * any context line by definition, so we cannot safely tell it
1093 * apart with --unified=0 insanity. At least if the patch has
1094 * more than one hunk it is not creation or deletion.
1096 if (patch->is_new < 0 &&
1097 (oldlines || (patch->fragments && patch->fragments->next)))
1099 if (patch->is_delete < 0 &&
1100 (newlines || (patch->fragments && patch->fragments->next)))
1101 patch->is_delete = 0;
1102 if (!unidiff_zero || context) {
1103 /* If the user says the patch is not generated with
1104 * --unified=0, or if we have seen context lines,
1105 * then not having oldlines means the patch is creation,
1106 * and not having newlines means the patch is deletion.
1108 if (patch->is_new < 0 && !oldlines) {
1110 patch->old_name = NULL;
1112 if (patch->is_delete < 0 && !newlines) {
1113 patch->is_delete = 1;
1114 patch->new_name = NULL;
1118 if (0 < patch->is_new && oldlines)
1119 die("new file %s depends on old contents", patch->new_name);
1120 if (0 < patch->is_delete && newlines)
1121 die("deleted file %s still has contents", patch->old_name);
1122 if (!patch->is_delete && !newlines && context)
1123 fprintf(stderr, "** warning: file %s becomes empty but "
1124 "is not deleted\n", patch->new_name);
1129 static inline int metadata_changes(struct patch *patch)
1131 return patch->is_rename > 0 ||
1132 patch->is_copy > 0 ||
1133 patch->is_new > 0 ||
1135 (patch->old_mode && patch->new_mode &&
1136 patch->old_mode != patch->new_mode);
1139 static char *inflate_it(const void *data, unsigned long size,
1140 unsigned long inflated_size)
1146 memset(&stream, 0, sizeof(stream));
1148 stream.next_in = (unsigned char *)data;
1149 stream.avail_in = size;
1150 stream.next_out = out = xmalloc(inflated_size);
1151 stream.avail_out = inflated_size;
1152 inflateInit(&stream);
1153 st = inflate(&stream, Z_FINISH);
1154 if ((st != Z_STREAM_END) || stream.total_out != inflated_size) {
1161 static struct fragment *parse_binary_hunk(char **buf_p,
1162 unsigned long *sz_p,
1167 * Expect a line that begins with binary patch method ("literal"
1168 * or "delta"), followed by the length of data before deflating.
1169 * a sequence of 'length-byte' followed by base-85 encoded data
1170 * should follow, terminated by a newline.
1172 * Each 5-byte sequence of base-85 encodes up to 4 bytes,
1173 * and we would limit the patch line to 66 characters,
1174 * so one line can fit up to 13 groups that would decode
1175 * to 52 bytes max. The length byte 'A'-'Z' corresponds
1176 * to 1-26 bytes, and 'a'-'z' corresponds to 27-52 bytes.
1179 unsigned long size = *sz_p;
1180 char *buffer = *buf_p;
1182 unsigned long origlen;
1185 struct fragment *frag;
1187 llen = linelen(buffer, size);
1192 if (!prefixcmp(buffer, "delta ")) {
1193 patch_method = BINARY_DELTA_DEFLATED;
1194 origlen = strtoul(buffer + 6, NULL, 10);
1196 else if (!prefixcmp(buffer, "literal ")) {
1197 patch_method = BINARY_LITERAL_DEFLATED;
1198 origlen = strtoul(buffer + 8, NULL, 10);
1206 int byte_length, max_byte_length, newsize;
1207 llen = linelen(buffer, size);
1211 /* consume the blank line */
1217 * Minimum line is "A00000\n" which is 7-byte long,
1218 * and the line length must be multiple of 5 plus 2.
1220 if ((llen < 7) || (llen-2) % 5)
1222 max_byte_length = (llen - 2) / 5 * 4;
1223 byte_length = *buffer;
1224 if ('A' <= byte_length && byte_length <= 'Z')
1225 byte_length = byte_length - 'A' + 1;
1226 else if ('a' <= byte_length && byte_length <= 'z')
1227 byte_length = byte_length - 'a' + 27;
1230 /* if the input length was not multiple of 4, we would
1231 * have filler at the end but the filler should never
1234 if (max_byte_length < byte_length ||
1235 byte_length <= max_byte_length - 4)
1237 newsize = hunk_size + byte_length;
1238 data = xrealloc(data, newsize);
1239 if (decode_85(data + hunk_size, buffer + 1, byte_length))
1241 hunk_size = newsize;
1246 frag = xcalloc(1, sizeof(*frag));
1247 frag->patch = inflate_it(data, hunk_size, origlen);
1251 frag->size = origlen;
1255 frag->binary_patch_method = patch_method;
1261 error("corrupt binary patch at line %d: %.*s",
1262 linenr-1, llen-1, buffer);
1266 static int parse_binary(char *buffer, unsigned long size, struct patch *patch)
1269 * We have read "GIT binary patch\n"; what follows is a line
1270 * that says the patch method (currently, either "literal" or
1271 * "delta") and the length of data before deflating; a
1272 * sequence of 'length-byte' followed by base-85 encoded data
1275 * When a binary patch is reversible, there is another binary
1276 * hunk in the same format, starting with patch method (either
1277 * "literal" or "delta") with the length of data, and a sequence
1278 * of length-byte + base-85 encoded data, terminated with another
1279 * empty line. This data, when applied to the postimage, produces
1282 struct fragment *forward;
1283 struct fragment *reverse;
1287 forward = parse_binary_hunk(&buffer, &size, &status, &used);
1288 if (!forward && !status)
1289 /* there has to be one hunk (forward hunk) */
1290 return error("unrecognized binary patch at line %d", linenr-1);
1292 /* otherwise we already gave an error message */
1295 reverse = parse_binary_hunk(&buffer, &size, &status, &used_1);
1300 * Not having reverse hunk is not an error, but having
1301 * a corrupt reverse hunk is.
1303 free((void*) forward->patch);
1307 forward->next = reverse;
1308 patch->fragments = forward;
1309 patch->is_binary = 1;
1313 static int parse_chunk(char *buffer, unsigned long size, struct patch *patch)
1315 int hdrsize, patchsize;
1316 int offset = find_header(buffer, size, &hdrsize, patch);
1321 patchsize = parse_single_patch(buffer + offset + hdrsize,
1322 size - offset - hdrsize, patch);
1325 static const char *binhdr[] = {
1330 static const char git_binary[] = "GIT binary patch\n";
1332 int hd = hdrsize + offset;
1333 unsigned long llen = linelen(buffer + hd, size - hd);
1335 if (llen == sizeof(git_binary) - 1 &&
1336 !memcmp(git_binary, buffer + hd, llen)) {
1339 used = parse_binary(buffer + hd + llen,
1340 size - hd - llen, patch);
1342 patchsize = used + llen;
1346 else if (!memcmp(" differ\n", buffer + hd + llen - 8, 8)) {
1347 for (i = 0; binhdr[i]; i++) {
1348 int len = strlen(binhdr[i]);
1349 if (len < size - hd &&
1350 !memcmp(binhdr[i], buffer + hd, len)) {
1352 patch->is_binary = 1;
1359 /* Empty patch cannot be applied if it is a text patch
1360 * without metadata change. A binary patch appears
1363 if ((apply || check) &&
1364 (!patch->is_binary && !metadata_changes(patch)))
1365 die("patch with only garbage at line %d", linenr);
1368 return offset + hdrsize + patchsize;
1371 #define swap(a,b) myswap((a),(b),sizeof(a))
1373 #define myswap(a, b, size) do { \
1374 unsigned char mytmp[size]; \
1375 memcpy(mytmp, &a, size); \
1376 memcpy(&a, &b, size); \
1377 memcpy(&b, mytmp, size); \
1380 static void reverse_patches(struct patch *p)
1382 for (; p; p = p->next) {
1383 struct fragment *frag = p->fragments;
1385 swap(p->new_name, p->old_name);
1386 swap(p->new_mode, p->old_mode);
1387 swap(p->is_new, p->is_delete);
1388 swap(p->lines_added, p->lines_deleted);
1389 swap(p->old_sha1_prefix, p->new_sha1_prefix);
1391 for (; frag; frag = frag->next) {
1392 swap(frag->newpos, frag->oldpos);
1393 swap(frag->newlines, frag->oldlines);
1398 static const char pluses[] =
1399 "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
1400 static const char minuses[]=
1401 "----------------------------------------------------------------------";
1403 static void show_stats(struct patch *patch)
1405 struct strbuf qname;
1406 char *cp = patch->new_name ? patch->new_name : patch->old_name;
1409 strbuf_init(&qname, 0);
1410 quote_c_style(cp, &qname, NULL, 0);
1413 * "scale" the filename
1419 if (qname.len > max) {
1420 cp = strchr(qname.buf + qname.len + 3 - max, '/');
1422 cp = qname.buf + qname.len + 3 - max;
1423 strbuf_splice(&qname, 0, cp - qname.buf, "...", 3);
1426 if (patch->is_binary) {
1427 printf(" %-*s | Bin\n", max, qname.buf);
1428 strbuf_release(&qname);
1432 printf(" %-*s |", max, qname.buf);
1433 strbuf_release(&qname);
1436 * scale the add/delete
1438 max = max + max_change > 70 ? 70 - max : max_change;
1439 add = patch->lines_added;
1440 del = patch->lines_deleted;
1442 if (max_change > 0) {
1443 int total = ((add + del) * max + max_change / 2) / max_change;
1444 add = (add * max + max_change / 2) / max_change;
1447 printf("%5d %.*s%.*s\n", patch->lines_added + patch->lines_deleted,
1448 add, pluses, del, minuses);
1451 static int read_old_data(struct stat *st, const char *path, struct strbuf *buf)
1453 switch (st->st_mode & S_IFMT) {
1455 strbuf_grow(buf, st->st_size);
1456 if (readlink(path, buf->buf, st->st_size) != st->st_size)
1458 strbuf_setlen(buf, st->st_size);
1461 if (strbuf_read_file(buf, path, st->st_size) != st->st_size)
1462 return error("unable to open or read %s", path);
1463 convert_to_git(path, buf->buf, buf->len, buf);
1470 static int find_offset(const char *buf, unsigned long size,
1471 const char *fragment, unsigned long fragsize,
1472 int line, int *lines)
1475 unsigned long start, backwards, forwards;
1477 if (fragsize > size)
1482 unsigned long offset = 0;
1484 while (offset + fragsize <= size) {
1485 if (buf[offset++] == '\n') {
1493 /* Exact line number? */
1494 if ((start + fragsize <= size) &&
1495 !memcmp(buf + start, fragment, fragsize))
1499 * There's probably some smart way to do this, but I'll leave
1500 * that to the smart and beautiful people. I'm simple and stupid.
1504 for (i = 0; ; i++) {
1511 if (forwards + fragsize > size)
1517 } while (backwards && buf[backwards-1] != '\n');
1520 while (forwards + fragsize <= size) {
1521 if (buf[forwards++] == '\n')
1527 if (try + fragsize > size)
1529 if (memcmp(buf + try, fragment, fragsize))
1539 * We should start searching forward and backward.
1544 static void remove_first_line(const char **rbuf, int *rsize)
1546 const char *buf = *rbuf;
1548 unsigned long offset;
1550 while (offset <= size) {
1551 if (buf[offset++] == '\n')
1554 *rsize = size - offset;
1555 *rbuf = buf + offset;
1558 static void remove_last_line(const char **rbuf, int *rsize)
1560 const char *buf = *rbuf;
1562 unsigned long offset;
1564 while (offset > 0) {
1565 if (buf[--offset] == '\n')
1568 *rsize = offset + 1;
1571 static int apply_line(char *output, const char *patch, int plen)
1574 * plen is number of bytes to be copied from patch,
1575 * starting at patch+1 (patch[0] is '+'). Typically
1576 * patch[plen] is '\n', unless this is the incomplete
1580 int add_nl_to_tail = 0;
1582 int last_tab_in_indent = -1;
1583 int last_space_in_indent = -1;
1584 int need_fix_leading_space = 0;
1587 if ((ws_error_action != correct_ws_error) || !whitespace_error ||
1589 memcpy(output, patch + 1, plen);
1594 * Strip trailing whitespace
1596 if ((whitespace_rule & WS_TRAILING_SPACE) &&
1597 (1 < plen && isspace(patch[plen-1]))) {
1598 if (patch[plen] == '\n')
1601 while (0 < plen && isspace(patch[plen]))
1607 * Check leading whitespaces (indent)
1609 for (i = 1; i < plen; i++) {
1612 last_tab_in_indent = i;
1613 if ((whitespace_rule & WS_SPACE_BEFORE_TAB) &&
1614 0 <= last_space_in_indent)
1615 need_fix_leading_space = 1;
1616 } else if (ch == ' ') {
1617 last_space_in_indent = i;
1618 if ((whitespace_rule & WS_INDENT_WITH_NON_TAB) &&
1619 last_tab_in_indent < 0 &&
1621 need_fix_leading_space = 1;
1628 if (need_fix_leading_space) {
1629 int consecutive_spaces = 0;
1630 int last = last_tab_in_indent + 1;
1632 if (whitespace_rule & WS_INDENT_WITH_NON_TAB) {
1633 /* have "last" point at one past the indent */
1634 if (last_tab_in_indent < last_space_in_indent)
1635 last = last_space_in_indent + 1;
1637 last = last_tab_in_indent + 1;
1641 * between patch[1..last], strip the funny spaces,
1642 * updating them to tab as needed.
1644 for (i = 1; i < last; i++, plen--) {
1647 consecutive_spaces = 0;
1650 consecutive_spaces++;
1651 if (consecutive_spaces == 8) {
1653 consecutive_spaces = 0;
1657 while (0 < consecutive_spaces--)
1665 memcpy(output, patch + i, plen);
1667 output[plen++] = '\n';
1669 applied_after_fixing_ws++;
1670 return output + plen - buf;
1673 static int apply_one_fragment(struct strbuf *buf, struct fragment *frag,
1676 int match_beginning, match_end;
1677 const char *patch = frag->patch;
1678 int offset, size = frag->size;
1679 char *old = xmalloc(size);
1680 char *new = xmalloc(size);
1681 const char *oldlines, *newlines;
1682 int oldsize = 0, newsize = 0;
1683 int new_blank_lines_at_end = 0;
1684 unsigned long leading, trailing;
1689 int len = linelen(patch, size);
1691 int added_blank_line = 0;
1697 * "plen" is how much of the line we should use for
1698 * the actual patch data. Normally we just remove the
1699 * first character on the line, but if the line is
1700 * followed by "\ No newline", then we also remove the
1701 * last one (which is the newline, of course).
1704 if (len < size && patch[len] == '\\')
1707 if (apply_in_reverse) {
1710 else if (first == '+')
1716 /* Newer GNU diff, empty context line */
1718 /* ... followed by '\No newline'; nothing */
1720 old[oldsize++] = '\n';
1721 new[newsize++] = '\n';
1725 memcpy(old + oldsize, patch + 1, plen);
1729 /* Fall-through for ' ' */
1731 if (first != '+' || !no_add) {
1732 int added = apply_line(new + newsize, patch,
1736 added == 1 && new[newsize-1] == '\n')
1737 added_blank_line = 1;
1740 case '@': case '\\':
1741 /* Ignore it, we already handled it */
1744 if (apply_verbosely)
1745 error("invalid start of line: '%c'", first);
1748 if (added_blank_line)
1749 new_blank_lines_at_end++;
1751 new_blank_lines_at_end = 0;
1756 if (inaccurate_eof &&
1757 oldsize > 0 && old[oldsize - 1] == '\n' &&
1758 newsize > 0 && new[newsize - 1] == '\n') {
1765 leading = frag->leading;
1766 trailing = frag->trailing;
1769 * If we don't have any leading/trailing data in the patch,
1770 * we want it to match at the beginning/end of the file.
1772 * But that would break if the patch is generated with
1773 * --unified=0; sane people wouldn't do that to cause us
1774 * trouble, but we try to please not so sane ones as well.
1777 match_beginning = (!leading && !frag->oldpos);
1781 match_beginning = !leading && (frag->oldpos == 1);
1782 match_end = !trailing;
1788 offset = find_offset(buf->buf, buf->len,
1789 oldlines, oldsize, pos, &lines);
1790 if (match_end && offset + oldsize != buf->len)
1792 if (match_beginning && offset)
1795 if (ws_error_action == correct_ws_error &&
1796 (buf->len - oldsize - offset == 0)) /* end of file? */
1797 newsize -= new_blank_lines_at_end;
1799 /* Warn if it was necessary to reduce the number
1802 if ((leading != frag->leading) ||
1803 (trailing != frag->trailing))
1804 fprintf(stderr, "Context reduced to (%ld/%ld)"
1805 " to apply fragment at %d\n",
1806 leading, trailing, pos + lines);
1808 strbuf_splice(buf, offset, oldsize, newlines, newsize);
1813 /* Am I at my context limits? */
1814 if ((leading <= p_context) && (trailing <= p_context))
1816 if (match_beginning || match_end) {
1817 match_beginning = match_end = 0;
1821 * Reduce the number of context lines; reduce both
1822 * leading and trailing if they are equal otherwise
1823 * just reduce the larger context.
1825 if (leading >= trailing) {
1826 remove_first_line(&oldlines, &oldsize);
1827 remove_first_line(&newlines, &newsize);
1831 if (trailing > leading) {
1832 remove_last_line(&oldlines, &oldsize);
1833 remove_last_line(&newlines, &newsize);
1838 if (offset && apply_verbosely)
1839 error("while searching for:\n%.*s", oldsize, oldlines);
1846 static int apply_binary_fragment(struct strbuf *buf, struct patch *patch)
1848 struct fragment *fragment = patch->fragments;
1852 /* Binary patch is irreversible without the optional second hunk */
1853 if (apply_in_reverse) {
1854 if (!fragment->next)
1855 return error("cannot reverse-apply a binary patch "
1856 "without the reverse hunk to '%s'",
1858 ? patch->new_name : patch->old_name);
1859 fragment = fragment->next;
1861 switch (fragment->binary_patch_method) {
1862 case BINARY_DELTA_DEFLATED:
1863 dst = patch_delta(buf->buf, buf->len, fragment->patch,
1864 fragment->size, &len);
1867 /* XXX patch_delta NUL-terminates */
1868 strbuf_attach(buf, dst, len, len + 1);
1870 case BINARY_LITERAL_DEFLATED:
1872 strbuf_add(buf, fragment->patch, fragment->size);
1878 static int apply_binary(struct strbuf *buf, struct patch *patch)
1880 const char *name = patch->old_name ? patch->old_name : patch->new_name;
1881 unsigned char sha1[20];
1884 * For safety, we require patch index line to contain
1885 * full 40-byte textual SHA1 for old and new, at least for now.
1887 if (strlen(patch->old_sha1_prefix) != 40 ||
1888 strlen(patch->new_sha1_prefix) != 40 ||
1889 get_sha1_hex(patch->old_sha1_prefix, sha1) ||
1890 get_sha1_hex(patch->new_sha1_prefix, sha1))
1891 return error("cannot apply binary patch to '%s' "
1892 "without full index line", name);
1894 if (patch->old_name) {
1896 * See if the old one matches what the patch
1899 hash_sha1_file(buf->buf, buf->len, blob_type, sha1);
1900 if (strcmp(sha1_to_hex(sha1), patch->old_sha1_prefix))
1901 return error("the patch applies to '%s' (%s), "
1902 "which does not match the "
1903 "current contents.",
1904 name, sha1_to_hex(sha1));
1907 /* Otherwise, the old one must be empty. */
1909 return error("the patch applies to an empty "
1910 "'%s' but it is not empty", name);
1913 get_sha1_hex(patch->new_sha1_prefix, sha1);
1914 if (is_null_sha1(sha1)) {
1915 strbuf_release(buf);
1916 return 0; /* deletion patch */
1919 if (has_sha1_file(sha1)) {
1920 /* We already have the postimage */
1921 enum object_type type;
1925 result = read_sha1_file(sha1, &type, &size);
1927 return error("the necessary postimage %s for "
1928 "'%s' cannot be read",
1929 patch->new_sha1_prefix, name);
1930 /* XXX read_sha1_file NUL-terminates */
1931 strbuf_attach(buf, result, size, size + 1);
1934 * We have verified buf matches the preimage;
1935 * apply the patch data to it, which is stored
1936 * in the patch->fragments->{patch,size}.
1938 if (apply_binary_fragment(buf, patch))
1939 return error("binary patch does not apply to '%s'",
1942 /* verify that the result matches */
1943 hash_sha1_file(buf->buf, buf->len, blob_type, sha1);
1944 if (strcmp(sha1_to_hex(sha1), patch->new_sha1_prefix))
1945 return error("binary patch to '%s' creates incorrect result (expecting %s, got %s)",
1946 name, patch->new_sha1_prefix, sha1_to_hex(sha1));
1952 static int apply_fragments(struct strbuf *buf, struct patch *patch)
1954 struct fragment *frag = patch->fragments;
1955 const char *name = patch->old_name ? patch->old_name : patch->new_name;
1957 if (patch->is_binary)
1958 return apply_binary(buf, patch);
1961 if (apply_one_fragment(buf, frag, patch->inaccurate_eof)) {
1962 error("patch failed: %s:%ld", name, frag->oldpos);
1963 if (!apply_with_reject)
1972 static int read_file_or_gitlink(struct cache_entry *ce, struct strbuf *buf)
1977 if (S_ISGITLINK(ntohl(ce->ce_mode))) {
1978 strbuf_grow(buf, 100);
1979 strbuf_addf(buf, "Subproject commit %s\n", sha1_to_hex(ce->sha1));
1981 enum object_type type;
1985 result = read_sha1_file(ce->sha1, &type, &sz);
1988 /* XXX read_sha1_file NUL-terminates */
1989 strbuf_attach(buf, result, sz, sz + 1);
1994 static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *ce)
1998 strbuf_init(&buf, 0);
2000 if (read_file_or_gitlink(ce, &buf))
2001 return error("read of %s failed", patch->old_name);
2002 } else if (patch->old_name) {
2003 if (S_ISGITLINK(patch->old_mode)) {
2005 read_file_or_gitlink(ce, &buf);
2008 * There is no way to apply subproject
2009 * patch without looking at the index.
2011 patch->fragments = NULL;
2014 if (read_old_data(st, patch->old_name, &buf))
2015 return error("read of %s failed", patch->old_name);
2019 if (apply_fragments(&buf, patch) < 0)
2020 return -1; /* note with --reject this succeeds. */
2021 patch->result = strbuf_detach(&buf, &patch->resultsize);
2023 if (0 < patch->is_delete && patch->resultsize)
2024 return error("removal patch leaves file contents");
2029 static int check_to_create_blob(const char *new_name, int ok_if_exists)
2032 if (!lstat(new_name, &nst)) {
2033 if (S_ISDIR(nst.st_mode) || ok_if_exists)
2036 * A leading component of new_name might be a symlink
2037 * that is going to be removed with this patch, but
2038 * still pointing at somewhere that has the path.
2039 * In such a case, path "new_name" does not exist as
2040 * far as git is concerned.
2042 if (has_symlink_leading_path(new_name, NULL))
2045 return error("%s: already exists in working directory", new_name);
2047 else if ((errno != ENOENT) && (errno != ENOTDIR))
2048 return error("%s: %s", new_name, strerror(errno));
2052 static int verify_index_match(struct cache_entry *ce, struct stat *st)
2054 if (S_ISGITLINK(ntohl(ce->ce_mode))) {
2055 if (!S_ISDIR(st->st_mode))
2059 return ce_match_stat(ce, st, 1);
2062 static int check_patch(struct patch *patch, struct patch *prev_patch)
2065 const char *old_name = patch->old_name;
2066 const char *new_name = patch->new_name;
2067 const char *name = old_name ? old_name : new_name;
2068 struct cache_entry *ce = NULL;
2071 patch->rejected = 1; /* we will drop this after we succeed */
2074 * Make sure that we do not have local modifications from the
2075 * index when we are looking at the index. Also make sure
2076 * we have the preimage file to be patched in the work tree,
2077 * unless --cached, which tells git to apply only in the index.
2081 unsigned st_mode = 0;
2084 stat_ret = lstat(old_name, &st);
2086 int pos = cache_name_pos(old_name, strlen(old_name));
2088 return error("%s: does not exist in index",
2090 ce = active_cache[pos];
2092 struct checkout costate;
2093 if (errno != ENOENT)
2094 return error("%s: %s", old_name,
2097 costate.base_dir = "";
2098 costate.base_dir_len = 0;
2101 costate.not_new = 0;
2102 costate.refresh_cache = 1;
2103 if (checkout_entry(ce,
2106 lstat(old_name, &st))
2109 if (!cached && verify_index_match(ce, &st))
2110 return error("%s: does not match index",
2113 st_mode = ntohl(ce->ce_mode);
2114 } else if (stat_ret < 0)
2115 return error("%s: %s", old_name, strerror(errno));
2118 st_mode = ntohl(ce_mode_from_stat(ce, st.st_mode));
2120 if (patch->is_new < 0)
2122 if (!patch->old_mode)
2123 patch->old_mode = st_mode;
2124 if ((st_mode ^ patch->old_mode) & S_IFMT)
2125 return error("%s: wrong type", old_name);
2126 if (st_mode != patch->old_mode)
2127 fprintf(stderr, "warning: %s has type %o, expected %o\n",
2128 old_name, st_mode, patch->old_mode);
2131 if (new_name && prev_patch && 0 < prev_patch->is_delete &&
2132 !strcmp(prev_patch->old_name, new_name))
2134 * A type-change diff is always split into a patch to
2135 * delete old, immediately followed by a patch to
2136 * create new (see diff.c::run_diff()); in such a case
2137 * it is Ok that the entry to be deleted by the
2138 * previous patch is still in the working tree and in
2146 ((0 < patch->is_new) | (0 < patch->is_rename) | patch->is_copy)) {
2148 cache_name_pos(new_name, strlen(new_name)) >= 0 &&
2150 return error("%s: already exists in index", new_name);
2152 int err = check_to_create_blob(new_name, ok_if_exists);
2156 if (!patch->new_mode) {
2157 if (0 < patch->is_new)
2158 patch->new_mode = S_IFREG | 0644;
2160 patch->new_mode = patch->old_mode;
2164 if (new_name && old_name) {
2165 int same = !strcmp(old_name, new_name);
2166 if (!patch->new_mode)
2167 patch->new_mode = patch->old_mode;
2168 if ((patch->old_mode ^ patch->new_mode) & S_IFMT)
2169 return error("new mode (%o) of %s does not match old mode (%o)%s%s",
2170 patch->new_mode, new_name, patch->old_mode,
2171 same ? "" : " of ", same ? "" : old_name);
2174 if (apply_data(patch, &st, ce) < 0)
2175 return error("%s: patch does not apply", name);
2176 patch->rejected = 0;
2180 static int check_patch_list(struct patch *patch)
2182 struct patch *prev_patch = NULL;
2185 for (prev_patch = NULL; patch ; patch = patch->next) {
2186 if (apply_verbosely)
2187 say_patch_name(stderr,
2188 "Checking patch ", patch, "...\n");
2189 err |= check_patch(patch, prev_patch);
2195 /* This function tries to read the sha1 from the current index */
2196 static int get_current_sha1(const char *path, unsigned char *sha1)
2200 if (read_cache() < 0)
2202 pos = cache_name_pos(path, strlen(path));
2205 hashcpy(sha1, active_cache[pos]->sha1);
2209 /* Build an index that contains the just the files needed for a 3way merge */
2210 static void build_fake_ancestor(struct patch *list, const char *filename)
2212 struct patch *patch;
2213 struct index_state result = { 0 };
2216 /* Once we start supporting the reverse patch, it may be
2217 * worth showing the new sha1 prefix, but until then...
2219 for (patch = list; patch; patch = patch->next) {
2220 const unsigned char *sha1_ptr;
2221 unsigned char sha1[20];
2222 struct cache_entry *ce;
2225 name = patch->old_name ? patch->old_name : patch->new_name;
2226 if (0 < patch->is_new)
2228 else if (get_sha1(patch->old_sha1_prefix, sha1))
2229 /* git diff has no index line for mode/type changes */
2230 if (!patch->lines_added && !patch->lines_deleted) {
2231 if (get_current_sha1(patch->new_name, sha1) ||
2232 get_current_sha1(patch->old_name, sha1))
2233 die("mode change for %s, which is not "
2234 "in current HEAD", name);
2237 die("sha1 information is lacking or useless "
2242 ce = make_cache_entry(patch->old_mode, sha1_ptr, name, 0, 0);
2243 if (add_index_entry(&result, ce, ADD_CACHE_OK_TO_ADD))
2244 die ("Could not add %s to temporary index", name);
2247 fd = open(filename, O_WRONLY | O_CREAT, 0666);
2248 if (fd < 0 || write_index(&result, fd) || close(fd))
2249 die ("Could not write temporary index to %s", filename);
2251 discard_index(&result);
2254 static void stat_patch_list(struct patch *patch)
2256 int files, adds, dels;
2258 for (files = adds = dels = 0 ; patch ; patch = patch->next) {
2260 adds += patch->lines_added;
2261 dels += patch->lines_deleted;
2265 printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files, adds, dels);
2268 static void numstat_patch_list(struct patch *patch)
2270 for ( ; patch; patch = patch->next) {
2272 name = patch->new_name ? patch->new_name : patch->old_name;
2273 if (patch->is_binary)
2276 printf("%d\t%d\t", patch->lines_added, patch->lines_deleted);
2277 write_name_quoted(name, stdout, line_termination);
2281 static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name)
2284 printf(" %s mode %06o %s\n", newdelete, mode, name);
2286 printf(" %s %s\n", newdelete, name);
2289 static void show_mode_change(struct patch *p, int show_name)
2291 if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) {
2293 printf(" mode change %06o => %06o %s\n",
2294 p->old_mode, p->new_mode, p->new_name);
2296 printf(" mode change %06o => %06o\n",
2297 p->old_mode, p->new_mode);
2301 static void show_rename_copy(struct patch *p)
2303 const char *renamecopy = p->is_rename ? "rename" : "copy";
2304 const char *old, *new;
2306 /* Find common prefix */
2310 const char *slash_old, *slash_new;
2311 slash_old = strchr(old, '/');
2312 slash_new = strchr(new, '/');
2315 slash_old - old != slash_new - new ||
2316 memcmp(old, new, slash_new - new))
2318 old = slash_old + 1;
2319 new = slash_new + 1;
2321 /* p->old_name thru old is the common prefix, and old and new
2322 * through the end of names are renames
2324 if (old != p->old_name)
2325 printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy,
2326 (int)(old - p->old_name), p->old_name,
2327 old, new, p->score);
2329 printf(" %s %s => %s (%d%%)\n", renamecopy,
2330 p->old_name, p->new_name, p->score);
2331 show_mode_change(p, 0);
2334 static void summary_patch_list(struct patch *patch)
2338 for (p = patch; p; p = p->next) {
2340 show_file_mode_name("create", p->new_mode, p->new_name);
2341 else if (p->is_delete)
2342 show_file_mode_name("delete", p->old_mode, p->old_name);
2344 if (p->is_rename || p->is_copy)
2345 show_rename_copy(p);
2348 printf(" rewrite %s (%d%%)\n",
2349 p->new_name, p->score);
2350 show_mode_change(p, 0);
2353 show_mode_change(p, 1);
2359 static void patch_stats(struct patch *patch)
2361 int lines = patch->lines_added + patch->lines_deleted;
2363 if (lines > max_change)
2365 if (patch->old_name) {
2366 int len = quote_c_style(patch->old_name, NULL, NULL, 0);
2368 len = strlen(patch->old_name);
2372 if (patch->new_name) {
2373 int len = quote_c_style(patch->new_name, NULL, NULL, 0);
2375 len = strlen(patch->new_name);
2381 static void remove_file(struct patch *patch, int rmdir_empty)
2384 if (remove_file_from_cache(patch->old_name) < 0)
2385 die("unable to remove %s from index", patch->old_name);
2388 if (S_ISGITLINK(patch->old_mode)) {
2389 if (rmdir(patch->old_name))
2390 warning("unable to remove submodule %s",
2392 } else if (!unlink(patch->old_name) && rmdir_empty) {
2393 char *name = xstrdup(patch->old_name);
2394 char *end = strrchr(name, '/');
2399 end = strrchr(name, '/');
2406 static void add_index_file(const char *path, unsigned mode, void *buf, unsigned long size)
2409 struct cache_entry *ce;
2410 int namelen = strlen(path);
2411 unsigned ce_size = cache_entry_size(namelen);
2416 ce = xcalloc(1, ce_size);
2417 memcpy(ce->name, path, namelen);
2418 ce->ce_mode = create_ce_mode(mode);
2419 ce->ce_flags = htons(namelen);
2420 if (S_ISGITLINK(mode)) {
2421 const char *s = buf;
2423 if (get_sha1_hex(s + strlen("Subproject commit "), ce->sha1))
2424 die("corrupt patch for subproject %s", path);
2427 if (lstat(path, &st) < 0)
2428 die("unable to stat newly created file %s",
2430 fill_stat_cache_info(ce, &st);
2432 if (write_sha1_file(buf, size, blob_type, ce->sha1) < 0)
2433 die("unable to create backing store for newly created file %s", path);
2435 if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0)
2436 die("unable to add cache entry for %s", path);
2439 static int try_create_file(const char *path, unsigned int mode, const char *buf, unsigned long size)
2444 if (S_ISGITLINK(mode)) {
2446 if (!lstat(path, &st) && S_ISDIR(st.st_mode))
2448 return mkdir(path, 0777);
2451 if (has_symlinks && S_ISLNK(mode))
2452 /* Although buf:size is counted string, it also is NUL
2455 return symlink(buf, path);
2457 fd = open(path, O_CREAT | O_EXCL | O_WRONLY, (mode & 0100) ? 0777 : 0666);
2461 strbuf_init(&nbuf, 0);
2462 if (convert_to_working_tree(path, buf, size, &nbuf)) {
2466 write_or_die(fd, buf, size);
2467 strbuf_release(&nbuf);
2470 die("closing file %s: %s", path, strerror(errno));
2475 * We optimistically assume that the directories exist,
2476 * which is true 99% of the time anyway. If they don't,
2477 * we create them and try again.
2479 static void create_one_file(char *path, unsigned mode, const char *buf, unsigned long size)
2483 if (!try_create_file(path, mode, buf, size))
2486 if (errno == ENOENT) {
2487 if (safe_create_leading_directories(path))
2489 if (!try_create_file(path, mode, buf, size))
2493 if (errno == EEXIST || errno == EACCES) {
2494 /* We may be trying to create a file where a directory
2498 if (!lstat(path, &st) && (!S_ISDIR(st.st_mode) || !rmdir(path)))
2502 if (errno == EEXIST) {
2503 unsigned int nr = getpid();
2506 const char *newpath;
2507 newpath = mkpath("%s~%u", path, nr);
2508 if (!try_create_file(newpath, mode, buf, size)) {
2509 if (!rename(newpath, path))
2514 if (errno != EEXIST)
2519 die("unable to write file %s mode %o", path, mode);
2522 static void create_file(struct patch *patch)
2524 char *path = patch->new_name;
2525 unsigned mode = patch->new_mode;
2526 unsigned long size = patch->resultsize;
2527 char *buf = patch->result;
2530 mode = S_IFREG | 0644;
2531 create_one_file(path, mode, buf, size);
2532 add_index_file(path, mode, buf, size);
2535 /* phase zero is to remove, phase one is to create */
2536 static void write_out_one_result(struct patch *patch, int phase)
2538 if (patch->is_delete > 0) {
2540 remove_file(patch, 1);
2543 if (patch->is_new > 0 || patch->is_copy) {
2549 * Rename or modification boils down to the same
2550 * thing: remove the old, write the new
2553 remove_file(patch, patch->is_rename);
2558 static int write_out_one_reject(struct patch *patch)
2561 char namebuf[PATH_MAX];
2562 struct fragment *frag;
2565 for (cnt = 0, frag = patch->fragments; frag; frag = frag->next) {
2566 if (!frag->rejected)
2572 if (apply_verbosely)
2573 say_patch_name(stderr,
2574 "Applied patch ", patch, " cleanly.\n");
2578 /* This should not happen, because a removal patch that leaves
2579 * contents are marked "rejected" at the patch level.
2581 if (!patch->new_name)
2582 die("internal error");
2584 /* Say this even without --verbose */
2585 say_patch_name(stderr, "Applying patch ", patch, " with");
2586 fprintf(stderr, " %d rejects...\n", cnt);
2588 cnt = strlen(patch->new_name);
2589 if (ARRAY_SIZE(namebuf) <= cnt + 5) {
2590 cnt = ARRAY_SIZE(namebuf) - 5;
2592 "warning: truncating .rej filename to %.*s.rej",
2593 cnt - 1, patch->new_name);
2595 memcpy(namebuf, patch->new_name, cnt);
2596 memcpy(namebuf + cnt, ".rej", 5);
2598 rej = fopen(namebuf, "w");
2600 return error("cannot open %s: %s", namebuf, strerror(errno));
2602 /* Normal git tools never deal with .rej, so do not pretend
2603 * this is a git patch by saying --git nor give extended
2604 * headers. While at it, maybe please "kompare" that wants
2605 * the trailing TAB and some garbage at the end of line ;-).
2607 fprintf(rej, "diff a/%s b/%s\t(rejected hunks)\n",
2608 patch->new_name, patch->new_name);
2609 for (cnt = 1, frag = patch->fragments;
2611 cnt++, frag = frag->next) {
2612 if (!frag->rejected) {
2613 fprintf(stderr, "Hunk #%d applied cleanly.\n", cnt);
2616 fprintf(stderr, "Rejected hunk #%d.\n", cnt);
2617 fprintf(rej, "%.*s", frag->size, frag->patch);
2618 if (frag->patch[frag->size-1] != '\n')
2625 static int write_out_results(struct patch *list, int skipped_patch)
2631 if (!list && !skipped_patch)
2632 return error("No changes");
2634 for (phase = 0; phase < 2; phase++) {
2640 write_out_one_result(l, phase);
2641 if (phase == 1 && write_out_one_reject(l))
2650 static struct lock_file lock_file;
2652 static struct excludes {
2653 struct excludes *next;
2657 static int use_patch(struct patch *p)
2659 const char *pathname = p->new_name ? p->new_name : p->old_name;
2660 struct excludes *x = excludes;
2662 if (fnmatch(x->path, pathname, 0) == 0)
2666 if (0 < prefix_length) {
2667 int pathlen = strlen(pathname);
2668 if (pathlen <= prefix_length ||
2669 memcmp(prefix, pathname, prefix_length))
2675 static void prefix_one(char **name)
2677 char *old_name = *name;
2680 *name = xstrdup(prefix_filename(prefix, prefix_length, *name));
2684 static void prefix_patches(struct patch *p)
2686 if (!prefix || p->is_toplevel_relative)
2688 for ( ; p; p = p->next) {
2689 if (p->new_name == p->old_name) {
2690 char *prefixed = p->new_name;
2691 prefix_one(&prefixed);
2692 p->new_name = p->old_name = prefixed;
2695 prefix_one(&p->new_name);
2696 prefix_one(&p->old_name);
2701 static int apply_patch(int fd, const char *filename, int inaccurate_eof)
2705 struct patch *list = NULL, **listp = &list;
2706 int skipped_patch = 0;
2708 strbuf_init(&buf, 0);
2709 patch_input_file = filename;
2710 read_patch_file(&buf, fd);
2712 while (offset < buf.len) {
2713 struct patch *patch;
2716 patch = xcalloc(1, sizeof(*patch));
2717 patch->inaccurate_eof = inaccurate_eof;
2718 nr = parse_chunk(buf.buf + offset, buf.len - offset, patch);
2721 if (apply_in_reverse)
2722 reverse_patches(patch);
2724 prefix_patches(patch);
2725 if (use_patch(patch)) {
2728 listp = &patch->next;
2731 /* perhaps free it a bit better? */
2738 if (whitespace_error && (ws_error_action == die_on_ws_error))
2741 update_index = check_index && apply;
2742 if (update_index && newfd < 0)
2743 newfd = hold_locked_index(&lock_file, 1);
2746 if (read_cache() < 0)
2747 die("unable to read index file");
2750 if ((check || apply) &&
2751 check_patch_list(list) < 0 &&
2755 if (apply && write_out_results(list, skipped_patch))
2759 build_fake_ancestor(list, fake_ancestor);
2762 stat_patch_list(list);
2765 numstat_patch_list(list);
2768 summary_patch_list(list);
2770 strbuf_release(&buf);
2774 static int git_apply_config(const char *var, const char *value)
2776 if (!strcmp(var, "apply.whitespace")) {
2777 apply_default_whitespace = xstrdup(value);
2780 return git_default_config(var, value);
2784 int cmd_apply(int argc, const char **argv, const char *unused_prefix)
2788 int inaccurate_eof = 0;
2790 int is_not_gitdir = 0;
2792 const char *whitespace_option = NULL;
2794 prefix = setup_git_directory_gently(&is_not_gitdir);
2795 prefix_length = prefix ? strlen(prefix) : 0;
2796 git_config(git_apply_config);
2797 if (apply_default_whitespace)
2798 parse_whitespace_option(apply_default_whitespace);
2800 for (i = 1; i < argc; i++) {
2801 const char *arg = argv[i];
2805 if (!strcmp(arg, "-")) {
2806 errs |= apply_patch(0, "<stdin>", inaccurate_eof);
2810 if (!prefixcmp(arg, "--exclude=")) {
2811 struct excludes *x = xmalloc(sizeof(*x));
2817 if (!prefixcmp(arg, "-p")) {
2818 p_value = atoi(arg + 2);
2822 if (!strcmp(arg, "--no-add")) {
2826 if (!strcmp(arg, "--stat")) {
2831 if (!strcmp(arg, "--allow-binary-replacement") ||
2832 !strcmp(arg, "--binary")) {
2833 continue; /* now no-op */
2835 if (!strcmp(arg, "--numstat")) {
2840 if (!strcmp(arg, "--summary")) {
2845 if (!strcmp(arg, "--check")) {
2850 if (!strcmp(arg, "--index")) {
2852 die("--index outside a repository");
2856 if (!strcmp(arg, "--cached")) {
2858 die("--cached outside a repository");
2863 if (!strcmp(arg, "--apply")) {
2867 if (!strcmp(arg, "--build-fake-ancestor")) {
2870 die ("need a filename");
2871 fake_ancestor = argv[i];
2874 if (!strcmp(arg, "-z")) {
2875 line_termination = 0;
2878 if (!prefixcmp(arg, "-C")) {
2879 p_context = strtoul(arg + 2, &end, 0);
2881 die("unrecognized context count '%s'", arg + 2);
2884 if (!prefixcmp(arg, "--whitespace=")) {
2885 whitespace_option = arg + 13;
2886 parse_whitespace_option(arg + 13);
2889 if (!strcmp(arg, "-R") || !strcmp(arg, "--reverse")) {
2890 apply_in_reverse = 1;
2893 if (!strcmp(arg, "--unidiff-zero")) {
2897 if (!strcmp(arg, "--reject")) {
2898 apply = apply_with_reject = apply_verbosely = 1;
2901 if (!strcmp(arg, "-v") || !strcmp(arg, "--verbose")) {
2902 apply_verbosely = 1;
2905 if (!strcmp(arg, "--inaccurate-eof")) {
2909 if (0 < prefix_length)
2910 arg = prefix_filename(prefix, prefix_length, arg);
2912 fd = open(arg, O_RDONLY);
2916 set_default_whitespace_mode(whitespace_option);
2917 errs |= apply_patch(fd, arg, inaccurate_eof);
2920 set_default_whitespace_mode(whitespace_option);
2922 errs |= apply_patch(0, "<stdin>", inaccurate_eof);
2923 if (whitespace_error) {
2924 if (squelch_whitespace_errors &&
2925 squelch_whitespace_errors < whitespace_error) {
2927 whitespace_error - squelch_whitespace_errors;
2928 fprintf(stderr, "warning: squelched %d "
2929 "whitespace error%s\n",
2931 squelched == 1 ? "" : "s");
2933 if (ws_error_action == die_on_ws_error)
2934 die("%d line%s add%s whitespace errors.",
2936 whitespace_error == 1 ? "" : "s",
2937 whitespace_error == 1 ? "s" : "");
2938 if (applied_after_fixing_ws)
2939 fprintf(stderr, "warning: %d line%s applied after"
2940 " fixing whitespace errors.\n",
2941 applied_after_fixing_ws,
2942 applied_after_fixing_ws == 1 ? "" : "s");
2943 else if (whitespace_error)
2944 fprintf(stderr, "warning: %d line%s add%s whitespace errors.\n",
2946 whitespace_error == 1 ? "" : "s",
2947 whitespace_error == 1 ? "s" : "");
2951 if (write_cache(newfd, active_cache, active_nr) ||
2952 close(newfd) || commit_locked_index(&lock_file))
2953 die("Unable to write new index file");