Merge branch 'maint'
[git/debian.git] / builtin-apply.c
blob11397f5504f98ccff47a90b228abc71b30327fb9
1 /*
2 * apply.c
4 * Copyright (C) Linus Torvalds, 2005
6 * This applies patches on top of some (arbitrary) version of the SCM.
8 */
9 #include <fnmatch.h>
10 #include "cache.h"
11 #include "cache-tree.h"
12 #include "quote.h"
13 #include "blob.h"
14 #include "delta.h"
15 #include "builtin.h"
18 * --check turns on checking that the working tree matches the
19 * files that are being modified, but doesn't apply the patch
20 * --stat does just a diffstat, and doesn't actually apply
21 * --numstat does numeric diffstat, and doesn't actually apply
22 * --index-info shows the old and new index info for paths if available.
23 * --index updates the cache as well.
24 * --cached updates only the cache without ever touching the working tree.
26 static const char *prefix;
27 static int prefix_length = -1;
28 static int newfd = -1;
30 static int unidiff_zero;
31 static int p_value = 1;
32 static int check_index;
33 static int write_index;
34 static int cached;
35 static int diffstat;
36 static int numstat;
37 static int summary;
38 static int check;
39 static int apply = 1;
40 static int apply_in_reverse;
41 static int apply_with_reject;
42 static int apply_verbosely;
43 static int no_add;
44 static int show_index_info;
45 static int line_termination = '\n';
46 static unsigned long p_context = -1;
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 {
51 nowarn_whitespace,
52 warn_on_whitespace,
53 error_on_whitespace,
54 strip_whitespace,
55 } new_whitespace = warn_on_whitespace;
56 static int whitespace_error;
57 static int squelch_whitespace_errors = 5;
58 static int applied_after_stripping;
59 static const char *patch_input_file;
61 static void parse_whitespace_option(const char *option)
63 if (!option) {
64 new_whitespace = warn_on_whitespace;
65 return;
67 if (!strcmp(option, "warn")) {
68 new_whitespace = warn_on_whitespace;
69 return;
71 if (!strcmp(option, "nowarn")) {
72 new_whitespace = nowarn_whitespace;
73 return;
75 if (!strcmp(option, "error")) {
76 new_whitespace = error_on_whitespace;
77 return;
79 if (!strcmp(option, "error-all")) {
80 new_whitespace = error_on_whitespace;
81 squelch_whitespace_errors = 0;
82 return;
84 if (!strcmp(option, "strip")) {
85 new_whitespace = strip_whitespace;
86 return;
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
95 ? warn_on_whitespace
96 : nowarn_whitespace);
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
103 * scaling.
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
119 * of context lines.
121 struct fragment {
122 unsigned long leading, trailing;
123 unsigned long oldpos, oldlines;
124 unsigned long newpos, newlines;
125 const char *patch;
126 int size;
127 int rejected;
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
140 struct patch {
141 char *new_name, *old_name, *def_name;
142 unsigned int old_mode, new_mode;
143 int is_rename, is_copy, is_new, is_delete, is_binary;
144 int rejected;
145 unsigned long deflate_origlen;
146 int lines_added, lines_deleted;
147 int score;
148 int inaccurate_eof:1;
149 struct fragment *fragments;
150 char *result;
151 unsigned long resultsize;
152 char old_sha1_prefix[41];
153 char new_sha1_prefix[41];
154 struct patch *next;
157 static void say_patch_name(FILE *output, const char *pre, struct patch *patch, const char *post)
159 fputs(pre, output);
160 if (patch->old_name && patch->new_name &&
161 strcmp(patch->old_name, patch->new_name)) {
162 write_name_quoted(NULL, 0, patch->old_name, 1, output);
163 fputs(" => ", output);
164 write_name_quoted(NULL, 0, patch->new_name, 1, output);
166 else {
167 const char *n = patch->new_name;
168 if (!n)
169 n = patch->old_name;
170 write_name_quoted(NULL, 0, n, 1, output);
172 fputs(post, output);
175 #define CHUNKSIZE (8192)
176 #define SLOP (16)
178 static void *read_patch_file(int fd, unsigned long *sizep)
180 unsigned long size = 0, alloc = CHUNKSIZE;
181 void *buffer = xmalloc(alloc);
183 for (;;) {
184 int nr = alloc - size;
185 if (nr < 1024) {
186 alloc += CHUNKSIZE;
187 buffer = xrealloc(buffer, alloc);
188 nr = alloc - size;
190 nr = xread(fd, (char *) buffer + size, nr);
191 if (!nr)
192 break;
193 if (nr < 0)
194 die("git-apply: read returned %s", strerror(errno));
195 size += nr;
197 *sizep = size;
200 * Make sure that we have some slop in the buffer
201 * so that we can do speculative "memcmp" etc, and
202 * see to it that it is NUL-filled.
204 if (alloc < size + SLOP)
205 buffer = xrealloc(buffer, size + SLOP);
206 memset((char *) buffer + size, 0, SLOP);
207 return buffer;
210 static unsigned long linelen(const char *buffer, unsigned long size)
212 unsigned long len = 0;
213 while (size--) {
214 len++;
215 if (*buffer++ == '\n')
216 break;
218 return len;
221 static int is_dev_null(const char *str)
223 return !memcmp("/dev/null", str, 9) && isspace(str[9]);
226 #define TERM_SPACE 1
227 #define TERM_TAB 2
229 static int name_terminate(const char *name, int namelen, int c, int terminate)
231 if (c == ' ' && !(terminate & TERM_SPACE))
232 return 0;
233 if (c == '\t' && !(terminate & TERM_TAB))
234 return 0;
236 return 1;
239 static char * find_name(const char *line, char *def, int p_value, int terminate)
241 int len;
242 const char *start = line;
243 char *name;
245 if (*line == '"') {
246 /* Proposed "new-style" GNU patch/diff format; see
247 * http://marc.theaimsgroup.com/?l=git&m=112927316408690&w=2
249 name = unquote_c_style(line, NULL);
250 if (name) {
251 char *cp = name;
252 while (p_value) {
253 cp = strchr(name, '/');
254 if (!cp)
255 break;
256 cp++;
257 p_value--;
259 if (cp) {
260 /* name can later be freed, so we need
261 * to memmove, not just return cp
263 memmove(name, cp, strlen(cp) + 1);
264 free(def);
265 return name;
267 else {
268 free(name);
269 name = NULL;
274 for (;;) {
275 char c = *line;
277 if (isspace(c)) {
278 if (c == '\n')
279 break;
280 if (name_terminate(start, line-start, c, terminate))
281 break;
283 line++;
284 if (c == '/' && !--p_value)
285 start = line;
287 if (!start)
288 return def;
289 len = line - start;
290 if (!len)
291 return def;
294 * Generally we prefer the shorter name, especially
295 * if the other one is just a variation of that with
296 * something else tacked on to the end (ie "file.orig"
297 * or "file~").
299 if (def) {
300 int deflen = strlen(def);
301 if (deflen < len && !strncmp(start, def, deflen))
302 return def;
305 name = xmalloc(len + 1);
306 memcpy(name, start, len);
307 name[len] = 0;
308 free(def);
309 return name;
313 * Get the name etc info from the --/+++ lines of a traditional patch header
315 * NOTE! This hardcodes "-p1" behaviour in filename detection.
317 * FIXME! The end-of-filename heuristics are kind of screwy. For existing
318 * files, we can happily check the index for a match, but for creating a
319 * new file we should try to match whatever "patch" does. I have no idea.
321 static void parse_traditional_patch(const char *first, const char *second, struct patch *patch)
323 char *name;
325 first += 4; /* skip "--- " */
326 second += 4; /* skip "+++ " */
327 if (is_dev_null(first)) {
328 patch->is_new = 1;
329 patch->is_delete = 0;
330 name = find_name(second, NULL, p_value, TERM_SPACE | TERM_TAB);
331 patch->new_name = name;
332 } else if (is_dev_null(second)) {
333 patch->is_new = 0;
334 patch->is_delete = 1;
335 name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
336 patch->old_name = name;
337 } else {
338 name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
339 name = find_name(second, name, p_value, TERM_SPACE | TERM_TAB);
340 patch->old_name = patch->new_name = name;
342 if (!name)
343 die("unable to find filename in patch at line %d", linenr);
346 static int gitdiff_hdrend(const char *line, struct patch *patch)
348 return -1;
352 * We're anal about diff header consistency, to make
353 * sure that we don't end up having strange ambiguous
354 * patches floating around.
356 * As a result, gitdiff_{old|new}name() will check
357 * their names against any previous information, just
358 * to make sure..
360 static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, const char *oldnew)
362 if (!orig_name && !isnull)
363 return find_name(line, NULL, 1, TERM_TAB);
365 if (orig_name) {
366 int len;
367 const char *name;
368 char *another;
369 name = orig_name;
370 len = strlen(name);
371 if (isnull)
372 die("git-apply: bad git-diff - expected /dev/null, got %s on line %d", name, linenr);
373 another = find_name(line, NULL, 1, TERM_TAB);
374 if (!another || memcmp(another, name, len))
375 die("git-apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr);
376 free(another);
377 return orig_name;
379 else {
380 /* expect "/dev/null" */
381 if (memcmp("/dev/null", line, 9) || line[9] != '\n')
382 die("git-apply: bad git-diff - expected /dev/null on line %d", linenr);
383 return NULL;
387 static int gitdiff_oldname(const char *line, struct patch *patch)
389 patch->old_name = gitdiff_verify_name(line, patch->is_new, patch->old_name, "old");
390 return 0;
393 static int gitdiff_newname(const char *line, struct patch *patch)
395 patch->new_name = gitdiff_verify_name(line, patch->is_delete, patch->new_name, "new");
396 return 0;
399 static int gitdiff_oldmode(const char *line, struct patch *patch)
401 patch->old_mode = strtoul(line, NULL, 8);
402 return 0;
405 static int gitdiff_newmode(const char *line, struct patch *patch)
407 patch->new_mode = strtoul(line, NULL, 8);
408 return 0;
411 static int gitdiff_delete(const char *line, struct patch *patch)
413 patch->is_delete = 1;
414 patch->old_name = patch->def_name;
415 return gitdiff_oldmode(line, patch);
418 static int gitdiff_newfile(const char *line, struct patch *patch)
420 patch->is_new = 1;
421 patch->new_name = patch->def_name;
422 return gitdiff_newmode(line, patch);
425 static int gitdiff_copysrc(const char *line, struct patch *patch)
427 patch->is_copy = 1;
428 patch->old_name = find_name(line, NULL, 0, 0);
429 return 0;
432 static int gitdiff_copydst(const char *line, struct patch *patch)
434 patch->is_copy = 1;
435 patch->new_name = find_name(line, NULL, 0, 0);
436 return 0;
439 static int gitdiff_renamesrc(const char *line, struct patch *patch)
441 patch->is_rename = 1;
442 patch->old_name = find_name(line, NULL, 0, 0);
443 return 0;
446 static int gitdiff_renamedst(const char *line, struct patch *patch)
448 patch->is_rename = 1;
449 patch->new_name = find_name(line, NULL, 0, 0);
450 return 0;
453 static int gitdiff_similarity(const char *line, struct patch *patch)
455 if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
456 patch->score = 0;
457 return 0;
460 static int gitdiff_dissimilarity(const char *line, struct patch *patch)
462 if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
463 patch->score = 0;
464 return 0;
467 static int gitdiff_index(const char *line, struct patch *patch)
469 /* index line is N hexadecimal, "..", N hexadecimal,
470 * and optional space with octal mode.
472 const char *ptr, *eol;
473 int len;
475 ptr = strchr(line, '.');
476 if (!ptr || ptr[1] != '.' || 40 < ptr - line)
477 return 0;
478 len = ptr - line;
479 memcpy(patch->old_sha1_prefix, line, len);
480 patch->old_sha1_prefix[len] = 0;
482 line = ptr + 2;
483 ptr = strchr(line, ' ');
484 eol = strchr(line, '\n');
486 if (!ptr || eol < ptr)
487 ptr = eol;
488 len = ptr - line;
490 if (40 < len)
491 return 0;
492 memcpy(patch->new_sha1_prefix, line, len);
493 patch->new_sha1_prefix[len] = 0;
494 if (*ptr == ' ')
495 patch->new_mode = patch->old_mode = strtoul(ptr+1, NULL, 8);
496 return 0;
500 * This is normal for a diff that doesn't change anything: we'll fall through
501 * into the next diff. Tell the parser to break out.
503 static int gitdiff_unrecognized(const char *line, struct patch *patch)
505 return -1;
508 static const char *stop_at_slash(const char *line, int llen)
510 int i;
512 for (i = 0; i < llen; i++) {
513 int ch = line[i];
514 if (ch == '/')
515 return line + i;
517 return NULL;
520 /* This is to extract the same name that appears on "diff --git"
521 * line. We do not find and return anything if it is a rename
522 * patch, and it is OK because we will find the name elsewhere.
523 * We need to reliably find name only when it is mode-change only,
524 * creation or deletion of an empty file. In any of these cases,
525 * both sides are the same name under a/ and b/ respectively.
527 static char *git_header_name(char *line, int llen)
529 int len;
530 const char *name;
531 const char *second = NULL;
533 line += strlen("diff --git ");
534 llen -= strlen("diff --git ");
536 if (*line == '"') {
537 const char *cp;
538 char *first = unquote_c_style(line, &second);
539 if (!first)
540 return NULL;
542 /* advance to the first slash */
543 cp = stop_at_slash(first, strlen(first));
544 if (!cp || cp == first) {
545 /* we do not accept absolute paths */
546 free_first_and_fail:
547 free(first);
548 return NULL;
550 len = strlen(cp+1);
551 memmove(first, cp+1, len+1); /* including NUL */
553 /* second points at one past closing dq of name.
554 * find the second name.
556 while ((second < line + llen) && isspace(*second))
557 second++;
559 if (line + llen <= second)
560 goto free_first_and_fail;
561 if (*second == '"') {
562 char *sp = unquote_c_style(second, NULL);
563 if (!sp)
564 goto free_first_and_fail;
565 cp = stop_at_slash(sp, strlen(sp));
566 if (!cp || cp == sp) {
567 free_both_and_fail:
568 free(sp);
569 goto free_first_and_fail;
571 /* They must match, otherwise ignore */
572 if (strcmp(cp+1, first))
573 goto free_both_and_fail;
574 free(sp);
575 return first;
578 /* unquoted second */
579 cp = stop_at_slash(second, line + llen - second);
580 if (!cp || cp == second)
581 goto free_first_and_fail;
582 cp++;
583 if (line + llen - cp != len + 1 ||
584 memcmp(first, cp, len))
585 goto free_first_and_fail;
586 return first;
589 /* unquoted first name */
590 name = stop_at_slash(line, llen);
591 if (!name || name == line)
592 return NULL;
594 name++;
596 /* since the first name is unquoted, a dq if exists must be
597 * the beginning of the second name.
599 for (second = name; second < line + llen; second++) {
600 if (*second == '"') {
601 const char *cp = second;
602 const char *np;
603 char *sp = unquote_c_style(second, NULL);
605 if (!sp)
606 return NULL;
607 np = stop_at_slash(sp, strlen(sp));
608 if (!np || np == sp) {
609 free_second_and_fail:
610 free(sp);
611 return NULL;
613 np++;
614 len = strlen(np);
615 if (len < cp - name &&
616 !strncmp(np, name, len) &&
617 isspace(name[len])) {
618 /* Good */
619 memmove(sp, np, len + 1);
620 return sp;
622 goto free_second_and_fail;
627 * Accept a name only if it shows up twice, exactly the same
628 * form.
630 for (len = 0 ; ; len++) {
631 switch (name[len]) {
632 default:
633 continue;
634 case '\n':
635 return NULL;
636 case '\t': case ' ':
637 second = name+len;
638 for (;;) {
639 char c = *second++;
640 if (c == '\n')
641 return NULL;
642 if (c == '/')
643 break;
645 if (second[len] == '\n' && !memcmp(name, second, len)) {
646 char *ret = xmalloc(len + 1);
647 memcpy(ret, name, len);
648 ret[len] = 0;
649 return ret;
653 return NULL;
656 /* Verify that we recognize the lines following a git header */
657 static int parse_git_header(char *line, int len, unsigned int size, struct patch *patch)
659 unsigned long offset;
661 /* A git diff has explicit new/delete information, so we don't guess */
662 patch->is_new = 0;
663 patch->is_delete = 0;
666 * Some things may not have the old name in the
667 * rest of the headers anywhere (pure mode changes,
668 * or removing or adding empty files), so we get
669 * the default name from the header.
671 patch->def_name = git_header_name(line, len);
673 line += len;
674 size -= len;
675 linenr++;
676 for (offset = len ; size > 0 ; offset += len, size -= len, line += len, linenr++) {
677 static const struct opentry {
678 const char *str;
679 int (*fn)(const char *, struct patch *);
680 } optable[] = {
681 { "@@ -", gitdiff_hdrend },
682 { "--- ", gitdiff_oldname },
683 { "+++ ", gitdiff_newname },
684 { "old mode ", gitdiff_oldmode },
685 { "new mode ", gitdiff_newmode },
686 { "deleted file mode ", gitdiff_delete },
687 { "new file mode ", gitdiff_newfile },
688 { "copy from ", gitdiff_copysrc },
689 { "copy to ", gitdiff_copydst },
690 { "rename old ", gitdiff_renamesrc },
691 { "rename new ", gitdiff_renamedst },
692 { "rename from ", gitdiff_renamesrc },
693 { "rename to ", gitdiff_renamedst },
694 { "similarity index ", gitdiff_similarity },
695 { "dissimilarity index ", gitdiff_dissimilarity },
696 { "index ", gitdiff_index },
697 { "", gitdiff_unrecognized },
699 int i;
701 len = linelen(line, size);
702 if (!len || line[len-1] != '\n')
703 break;
704 for (i = 0; i < ARRAY_SIZE(optable); i++) {
705 const struct opentry *p = optable + i;
706 int oplen = strlen(p->str);
707 if (len < oplen || memcmp(p->str, line, oplen))
708 continue;
709 if (p->fn(line + oplen, patch) < 0)
710 return offset;
711 break;
715 return offset;
718 static int parse_num(const char *line, unsigned long *p)
720 char *ptr;
722 if (!isdigit(*line))
723 return 0;
724 *p = strtoul(line, &ptr, 10);
725 return ptr - line;
728 static int parse_range(const char *line, int len, int offset, const char *expect,
729 unsigned long *p1, unsigned long *p2)
731 int digits, ex;
733 if (offset < 0 || offset >= len)
734 return -1;
735 line += offset;
736 len -= offset;
738 digits = parse_num(line, p1);
739 if (!digits)
740 return -1;
742 offset += digits;
743 line += digits;
744 len -= digits;
746 *p2 = 1;
747 if (*line == ',') {
748 digits = parse_num(line+1, p2);
749 if (!digits)
750 return -1;
752 offset += digits+1;
753 line += digits+1;
754 len -= digits+1;
757 ex = strlen(expect);
758 if (ex > len)
759 return -1;
760 if (memcmp(line, expect, ex))
761 return -1;
763 return offset + ex;
767 * Parse a unified diff fragment header of the
768 * form "@@ -a,b +c,d @@"
770 static int parse_fragment_header(char *line, int len, struct fragment *fragment)
772 int offset;
774 if (!len || line[len-1] != '\n')
775 return -1;
777 /* Figure out the number of lines in a fragment */
778 offset = parse_range(line, len, 4, " +", &fragment->oldpos, &fragment->oldlines);
779 offset = parse_range(line, len, offset, " @@", &fragment->newpos, &fragment->newlines);
781 return offset;
784 static int find_header(char *line, unsigned long size, int *hdrsize, struct patch *patch)
786 unsigned long offset, len;
788 patch->is_rename = patch->is_copy = 0;
789 patch->is_new = patch->is_delete = -1;
790 patch->old_mode = patch->new_mode = 0;
791 patch->old_name = patch->new_name = NULL;
792 for (offset = 0; size > 0; offset += len, size -= len, line += len, linenr++) {
793 unsigned long nextlen;
795 len = linelen(line, size);
796 if (!len)
797 break;
799 /* Testing this early allows us to take a few shortcuts.. */
800 if (len < 6)
801 continue;
804 * Make sure we don't find any unconnected patch fragments.
805 * That's a sign that we didn't find a header, and that a
806 * patch has become corrupted/broken up.
808 if (!memcmp("@@ -", line, 4)) {
809 struct fragment dummy;
810 if (parse_fragment_header(line, len, &dummy) < 0)
811 continue;
812 error("patch fragment without header at line %d: %.*s", linenr, (int)len-1, line);
815 if (size < len + 6)
816 break;
819 * Git patch? It might not have a real patch, just a rename
820 * or mode change, so we handle that specially
822 if (!memcmp("diff --git ", line, 11)) {
823 int git_hdr_len = parse_git_header(line, len, size, patch);
824 if (git_hdr_len <= len)
825 continue;
826 if (!patch->old_name && !patch->new_name) {
827 if (!patch->def_name)
828 die("git diff header lacks filename information (line %d)", linenr);
829 patch->old_name = patch->new_name = patch->def_name;
831 *hdrsize = git_hdr_len;
832 return offset;
835 /** --- followed by +++ ? */
836 if (memcmp("--- ", line, 4) || memcmp("+++ ", line + len, 4))
837 continue;
840 * We only accept unified patches, so we want it to
841 * at least have "@@ -a,b +c,d @@\n", which is 14 chars
842 * minimum
844 nextlen = linelen(line + len, size - len);
845 if (size < nextlen + 14 || memcmp("@@ -", line + len + nextlen, 4))
846 continue;
848 /* Ok, we'll consider it a patch */
849 parse_traditional_patch(line, line+len, patch);
850 *hdrsize = len + nextlen;
851 linenr += 2;
852 return offset;
854 return -1;
857 static void check_whitespace(const char *line, int len)
859 const char *err = "Adds trailing whitespace";
860 int seen_space = 0;
861 int i;
864 * We know len is at least two, since we have a '+' and we
865 * checked that the last character was a '\n' before calling
866 * this function. That is, an addition of an empty line would
867 * check the '+' here. Sneaky...
869 if (isspace(line[len-2]))
870 goto error;
873 * Make sure that there is no space followed by a tab in
874 * indentation.
876 err = "Space in indent is followed by a tab";
877 for (i = 1; i < len; i++) {
878 if (line[i] == '\t') {
879 if (seen_space)
880 goto error;
882 else if (line[i] == ' ')
883 seen_space = 1;
884 else
885 break;
887 return;
889 error:
890 whitespace_error++;
891 if (squelch_whitespace_errors &&
892 squelch_whitespace_errors < whitespace_error)
894 else
895 fprintf(stderr, "%s.\n%s:%d:%.*s\n",
896 err, patch_input_file, linenr, len-2, line+1);
901 * Parse a unified diff. Note that this really needs to parse each
902 * fragment separately, since the only way to know the difference
903 * between a "---" that is part of a patch, and a "---" that starts
904 * the next patch is to look at the line counts..
906 static int parse_fragment(char *line, unsigned long size, struct patch *patch, struct fragment *fragment)
908 int added, deleted;
909 int len = linelen(line, size), offset;
910 unsigned long oldlines, newlines;
911 unsigned long leading, trailing;
913 offset = parse_fragment_header(line, len, fragment);
914 if (offset < 0)
915 return -1;
916 oldlines = fragment->oldlines;
917 newlines = fragment->newlines;
918 leading = 0;
919 trailing = 0;
921 /* Parse the thing.. */
922 line += len;
923 size -= len;
924 linenr++;
925 added = deleted = 0;
926 for (offset = len;
927 0 < size;
928 offset += len, size -= len, line += len, linenr++) {
929 if (!oldlines && !newlines)
930 break;
931 len = linelen(line, size);
932 if (!len || line[len-1] != '\n')
933 return -1;
934 switch (*line) {
935 default:
936 return -1;
937 case '\n': /* newer GNU diff, an empty context line */
938 case ' ':
939 oldlines--;
940 newlines--;
941 if (!deleted && !added)
942 leading++;
943 trailing++;
944 break;
945 case '-':
946 deleted++;
947 oldlines--;
948 trailing = 0;
949 break;
950 case '+':
951 if (new_whitespace != nowarn_whitespace)
952 check_whitespace(line, len);
953 added++;
954 newlines--;
955 trailing = 0;
956 break;
958 /* We allow "\ No newline at end of file". Depending
959 * on locale settings when the patch was produced we
960 * don't know what this line looks like. The only
961 * thing we do know is that it begins with "\ ".
962 * Checking for 12 is just for sanity check -- any
963 * l10n of "\ No newline..." is at least that long.
965 case '\\':
966 if (len < 12 || memcmp(line, "\\ ", 2))
967 return -1;
968 break;
971 if (oldlines || newlines)
972 return -1;
973 fragment->leading = leading;
974 fragment->trailing = trailing;
976 /* If a fragment ends with an incomplete line, we failed to include
977 * it in the above loop because we hit oldlines == newlines == 0
978 * before seeing it.
980 if (12 < size && !memcmp(line, "\\ ", 2))
981 offset += linelen(line, size);
983 patch->lines_added += added;
984 patch->lines_deleted += deleted;
986 if (0 < patch->is_new && oldlines)
987 return error("new file depends on old contents");
988 if (0 < patch->is_delete && newlines)
989 return error("deleted file still has contents");
990 return offset;
993 static int parse_single_patch(char *line, unsigned long size, struct patch *patch)
995 unsigned long offset = 0;
996 unsigned long oldlines = 0, newlines = 0, context = 0;
997 struct fragment **fragp = &patch->fragments;
999 while (size > 4 && !memcmp(line, "@@ -", 4)) {
1000 struct fragment *fragment;
1001 int len;
1003 fragment = xcalloc(1, sizeof(*fragment));
1004 len = parse_fragment(line, size, patch, fragment);
1005 if (len <= 0)
1006 die("corrupt patch at line %d", linenr);
1007 fragment->patch = line;
1008 fragment->size = len;
1009 oldlines += fragment->oldlines;
1010 newlines += fragment->newlines;
1011 context += fragment->leading + fragment->trailing;
1013 *fragp = fragment;
1014 fragp = &fragment->next;
1016 offset += len;
1017 line += len;
1018 size -= len;
1022 * If something was removed (i.e. we have old-lines) it cannot
1023 * be creation, and if something was added it cannot be
1024 * deletion. However, the reverse is not true; --unified=0
1025 * patches that only add are not necessarily creation even
1026 * though they do not have any old lines, and ones that only
1027 * delete are not necessarily deletion.
1029 * Unfortunately, a real creation/deletion patch do _not_ have
1030 * any context line by definition, so we cannot safely tell it
1031 * apart with --unified=0 insanity. At least if the patch has
1032 * more than one hunk it is not creation or deletion.
1034 if (patch->is_new < 0 &&
1035 (oldlines || (patch->fragments && patch->fragments->next)))
1036 patch->is_new = 0;
1037 if (patch->is_delete < 0 &&
1038 (newlines || (patch->fragments && patch->fragments->next)))
1039 patch->is_delete = 0;
1040 if (!unidiff_zero || context) {
1041 /* If the user says the patch is not generated with
1042 * --unified=0, or if we have seen context lines,
1043 * then not having oldlines means the patch is creation,
1044 * and not having newlines means the patch is deletion.
1046 if (patch->is_new < 0 && !oldlines)
1047 patch->is_new = 1;
1048 if (patch->is_delete < 0 && !newlines)
1049 patch->is_delete = 1;
1052 if (0 < patch->is_new && oldlines)
1053 die("new file %s depends on old contents", patch->new_name);
1054 if (0 < patch->is_delete && newlines)
1055 die("deleted file %s still has contents", patch->old_name);
1056 if (!patch->is_delete && !newlines && context)
1057 fprintf(stderr, "** warning: file %s becomes empty but "
1058 "is not deleted\n", patch->new_name);
1060 return offset;
1063 static inline int metadata_changes(struct patch *patch)
1065 return patch->is_rename > 0 ||
1066 patch->is_copy > 0 ||
1067 patch->is_new > 0 ||
1068 patch->is_delete ||
1069 (patch->old_mode && patch->new_mode &&
1070 patch->old_mode != patch->new_mode);
1073 static char *inflate_it(const void *data, unsigned long size,
1074 unsigned long inflated_size)
1076 z_stream stream;
1077 void *out;
1078 int st;
1080 memset(&stream, 0, sizeof(stream));
1082 stream.next_in = (unsigned char *)data;
1083 stream.avail_in = size;
1084 stream.next_out = out = xmalloc(inflated_size);
1085 stream.avail_out = inflated_size;
1086 inflateInit(&stream);
1087 st = inflate(&stream, Z_FINISH);
1088 if ((st != Z_STREAM_END) || stream.total_out != inflated_size) {
1089 free(out);
1090 return NULL;
1092 return out;
1095 static struct fragment *parse_binary_hunk(char **buf_p,
1096 unsigned long *sz_p,
1097 int *status_p,
1098 int *used_p)
1100 /* Expect a line that begins with binary patch method ("literal"
1101 * or "delta"), followed by the length of data before deflating.
1102 * a sequence of 'length-byte' followed by base-85 encoded data
1103 * should follow, terminated by a newline.
1105 * Each 5-byte sequence of base-85 encodes up to 4 bytes,
1106 * and we would limit the patch line to 66 characters,
1107 * so one line can fit up to 13 groups that would decode
1108 * to 52 bytes max. The length byte 'A'-'Z' corresponds
1109 * to 1-26 bytes, and 'a'-'z' corresponds to 27-52 bytes.
1111 int llen, used;
1112 unsigned long size = *sz_p;
1113 char *buffer = *buf_p;
1114 int patch_method;
1115 unsigned long origlen;
1116 char *data = NULL;
1117 int hunk_size = 0;
1118 struct fragment *frag;
1120 llen = linelen(buffer, size);
1121 used = llen;
1123 *status_p = 0;
1125 if (!strncmp(buffer, "delta ", 6)) {
1126 patch_method = BINARY_DELTA_DEFLATED;
1127 origlen = strtoul(buffer + 6, NULL, 10);
1129 else if (!strncmp(buffer, "literal ", 8)) {
1130 patch_method = BINARY_LITERAL_DEFLATED;
1131 origlen = strtoul(buffer + 8, NULL, 10);
1133 else
1134 return NULL;
1136 linenr++;
1137 buffer += llen;
1138 while (1) {
1139 int byte_length, max_byte_length, newsize;
1140 llen = linelen(buffer, size);
1141 used += llen;
1142 linenr++;
1143 if (llen == 1) {
1144 /* consume the blank line */
1145 buffer++;
1146 size--;
1147 break;
1149 /* Minimum line is "A00000\n" which is 7-byte long,
1150 * and the line length must be multiple of 5 plus 2.
1152 if ((llen < 7) || (llen-2) % 5)
1153 goto corrupt;
1154 max_byte_length = (llen - 2) / 5 * 4;
1155 byte_length = *buffer;
1156 if ('A' <= byte_length && byte_length <= 'Z')
1157 byte_length = byte_length - 'A' + 1;
1158 else if ('a' <= byte_length && byte_length <= 'z')
1159 byte_length = byte_length - 'a' + 27;
1160 else
1161 goto corrupt;
1162 /* if the input length was not multiple of 4, we would
1163 * have filler at the end but the filler should never
1164 * exceed 3 bytes
1166 if (max_byte_length < byte_length ||
1167 byte_length <= max_byte_length - 4)
1168 goto corrupt;
1169 newsize = hunk_size + byte_length;
1170 data = xrealloc(data, newsize);
1171 if (decode_85(data + hunk_size, buffer + 1, byte_length))
1172 goto corrupt;
1173 hunk_size = newsize;
1174 buffer += llen;
1175 size -= llen;
1178 frag = xcalloc(1, sizeof(*frag));
1179 frag->patch = inflate_it(data, hunk_size, origlen);
1180 if (!frag->patch)
1181 goto corrupt;
1182 free(data);
1183 frag->size = origlen;
1184 *buf_p = buffer;
1185 *sz_p = size;
1186 *used_p = used;
1187 frag->binary_patch_method = patch_method;
1188 return frag;
1190 corrupt:
1191 free(data);
1192 *status_p = -1;
1193 error("corrupt binary patch at line %d: %.*s",
1194 linenr-1, llen-1, buffer);
1195 return NULL;
1198 static int parse_binary(char *buffer, unsigned long size, struct patch *patch)
1200 /* We have read "GIT binary patch\n"; what follows is a line
1201 * that says the patch method (currently, either "literal" or
1202 * "delta") and the length of data before deflating; a
1203 * sequence of 'length-byte' followed by base-85 encoded data
1204 * follows.
1206 * When a binary patch is reversible, there is another binary
1207 * hunk in the same format, starting with patch method (either
1208 * "literal" or "delta") with the length of data, and a sequence
1209 * of length-byte + base-85 encoded data, terminated with another
1210 * empty line. This data, when applied to the postimage, produces
1211 * the preimage.
1213 struct fragment *forward;
1214 struct fragment *reverse;
1215 int status;
1216 int used, used_1;
1218 forward = parse_binary_hunk(&buffer, &size, &status, &used);
1219 if (!forward && !status)
1220 /* there has to be one hunk (forward hunk) */
1221 return error("unrecognized binary patch at line %d", linenr-1);
1222 if (status)
1223 /* otherwise we already gave an error message */
1224 return status;
1226 reverse = parse_binary_hunk(&buffer, &size, &status, &used_1);
1227 if (reverse)
1228 used += used_1;
1229 else if (status) {
1230 /* not having reverse hunk is not an error, but having
1231 * a corrupt reverse hunk is.
1233 free((void*) forward->patch);
1234 free(forward);
1235 return status;
1237 forward->next = reverse;
1238 patch->fragments = forward;
1239 patch->is_binary = 1;
1240 return used;
1243 static int parse_chunk(char *buffer, unsigned long size, struct patch *patch)
1245 int hdrsize, patchsize;
1246 int offset = find_header(buffer, size, &hdrsize, patch);
1248 if (offset < 0)
1249 return offset;
1251 patchsize = parse_single_patch(buffer + offset + hdrsize, size - offset - hdrsize, patch);
1253 if (!patchsize) {
1254 static const char *binhdr[] = {
1255 "Binary files ",
1256 "Files ",
1257 NULL,
1259 static const char git_binary[] = "GIT binary patch\n";
1260 int i;
1261 int hd = hdrsize + offset;
1262 unsigned long llen = linelen(buffer + hd, size - hd);
1264 if (llen == sizeof(git_binary) - 1 &&
1265 !memcmp(git_binary, buffer + hd, llen)) {
1266 int used;
1267 linenr++;
1268 used = parse_binary(buffer + hd + llen,
1269 size - hd - llen, patch);
1270 if (used)
1271 patchsize = used + llen;
1272 else
1273 patchsize = 0;
1275 else if (!memcmp(" differ\n", buffer + hd + llen - 8, 8)) {
1276 for (i = 0; binhdr[i]; i++) {
1277 int len = strlen(binhdr[i]);
1278 if (len < size - hd &&
1279 !memcmp(binhdr[i], buffer + hd, len)) {
1280 linenr++;
1281 patch->is_binary = 1;
1282 patchsize = llen;
1283 break;
1288 /* Empty patch cannot be applied if it is a text patch
1289 * without metadata change. A binary patch appears
1290 * empty to us here.
1292 if ((apply || check) &&
1293 (!patch->is_binary && !metadata_changes(patch)))
1294 die("patch with only garbage at line %d", linenr);
1297 return offset + hdrsize + patchsize;
1300 #define swap(a,b) myswap((a),(b),sizeof(a))
1302 #define myswap(a, b, size) do { \
1303 unsigned char mytmp[size]; \
1304 memcpy(mytmp, &a, size); \
1305 memcpy(&a, &b, size); \
1306 memcpy(&b, mytmp, size); \
1307 } while (0)
1309 static void reverse_patches(struct patch *p)
1311 for (; p; p = p->next) {
1312 struct fragment *frag = p->fragments;
1314 swap(p->new_name, p->old_name);
1315 swap(p->new_mode, p->old_mode);
1316 swap(p->is_new, p->is_delete);
1317 swap(p->lines_added, p->lines_deleted);
1318 swap(p->old_sha1_prefix, p->new_sha1_prefix);
1320 for (; frag; frag = frag->next) {
1321 swap(frag->newpos, frag->oldpos);
1322 swap(frag->newlines, frag->oldlines);
1327 static const char pluses[] = "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
1328 static const char minuses[]= "----------------------------------------------------------------------";
1330 static void show_stats(struct patch *patch)
1332 const char *prefix = "";
1333 char *name = patch->new_name;
1334 char *qname = NULL;
1335 int len, max, add, del, total;
1337 if (!name)
1338 name = patch->old_name;
1340 if (0 < (len = quote_c_style(name, NULL, NULL, 0))) {
1341 qname = xmalloc(len + 1);
1342 quote_c_style(name, qname, NULL, 0);
1343 name = qname;
1347 * "scale" the filename
1349 len = strlen(name);
1350 max = max_len;
1351 if (max > 50)
1352 max = 50;
1353 if (len > max) {
1354 char *slash;
1355 prefix = "...";
1356 max -= 3;
1357 name += len - max;
1358 slash = strchr(name, '/');
1359 if (slash)
1360 name = slash;
1362 len = max;
1365 * scale the add/delete
1367 max = max_change;
1368 if (max + len > 70)
1369 max = 70 - len;
1371 add = patch->lines_added;
1372 del = patch->lines_deleted;
1373 total = add + del;
1375 if (max_change > 0) {
1376 total = (total * max + max_change / 2) / max_change;
1377 add = (add * max + max_change / 2) / max_change;
1378 del = total - add;
1380 if (patch->is_binary)
1381 printf(" %s%-*s | Bin\n", prefix, len, name);
1382 else
1383 printf(" %s%-*s |%5d %.*s%.*s\n", prefix,
1384 len, name, patch->lines_added + patch->lines_deleted,
1385 add, pluses, del, minuses);
1386 free(qname);
1389 static int read_old_data(struct stat *st, const char *path, void *buf, unsigned long size)
1391 int fd;
1392 unsigned long got;
1394 switch (st->st_mode & S_IFMT) {
1395 case S_IFLNK:
1396 return readlink(path, buf, size);
1397 case S_IFREG:
1398 fd = open(path, O_RDONLY);
1399 if (fd < 0)
1400 return error("unable to open %s", path);
1401 got = 0;
1402 for (;;) {
1403 int ret = xread(fd, (char *) buf + got, size - got);
1404 if (ret <= 0)
1405 break;
1406 got += ret;
1408 close(fd);
1409 return got;
1411 default:
1412 return -1;
1416 static int find_offset(const char *buf, unsigned long size, const char *fragment, unsigned long fragsize, int line, int *lines)
1418 int i;
1419 unsigned long start, backwards, forwards;
1421 if (fragsize > size)
1422 return -1;
1424 start = 0;
1425 if (line > 1) {
1426 unsigned long offset = 0;
1427 i = line-1;
1428 while (offset + fragsize <= size) {
1429 if (buf[offset++] == '\n') {
1430 start = offset;
1431 if (!--i)
1432 break;
1437 /* Exact line number? */
1438 if (!memcmp(buf + start, fragment, fragsize))
1439 return start;
1442 * There's probably some smart way to do this, but I'll leave
1443 * that to the smart and beautiful people. I'm simple and stupid.
1445 backwards = start;
1446 forwards = start;
1447 for (i = 0; ; i++) {
1448 unsigned long try;
1449 int n;
1451 /* "backward" */
1452 if (i & 1) {
1453 if (!backwards) {
1454 if (forwards + fragsize > size)
1455 break;
1456 continue;
1458 do {
1459 --backwards;
1460 } while (backwards && buf[backwards-1] != '\n');
1461 try = backwards;
1462 } else {
1463 while (forwards + fragsize <= size) {
1464 if (buf[forwards++] == '\n')
1465 break;
1467 try = forwards;
1470 if (try + fragsize > size)
1471 continue;
1472 if (memcmp(buf + try, fragment, fragsize))
1473 continue;
1474 n = (i >> 1)+1;
1475 if (i & 1)
1476 n = -n;
1477 *lines = n;
1478 return try;
1482 * We should start searching forward and backward.
1484 return -1;
1487 static void remove_first_line(const char **rbuf, int *rsize)
1489 const char *buf = *rbuf;
1490 int size = *rsize;
1491 unsigned long offset;
1492 offset = 0;
1493 while (offset <= size) {
1494 if (buf[offset++] == '\n')
1495 break;
1497 *rsize = size - offset;
1498 *rbuf = buf + offset;
1501 static void remove_last_line(const char **rbuf, int *rsize)
1503 const char *buf = *rbuf;
1504 int size = *rsize;
1505 unsigned long offset;
1506 offset = size - 1;
1507 while (offset > 0) {
1508 if (buf[--offset] == '\n')
1509 break;
1511 *rsize = offset + 1;
1514 struct buffer_desc {
1515 char *buffer;
1516 unsigned long size;
1517 unsigned long alloc;
1520 static int apply_line(char *output, const char *patch, int plen)
1522 /* plen is number of bytes to be copied from patch,
1523 * starting at patch+1 (patch[0] is '+'). Typically
1524 * patch[plen] is '\n', unless this is the incomplete
1525 * last line.
1527 int i;
1528 int add_nl_to_tail = 0;
1529 int fixed = 0;
1530 int last_tab_in_indent = -1;
1531 int last_space_in_indent = -1;
1532 int need_fix_leading_space = 0;
1533 char *buf;
1535 if ((new_whitespace != strip_whitespace) || !whitespace_error) {
1536 memcpy(output, patch + 1, plen);
1537 return plen;
1540 if (1 < plen && isspace(patch[plen-1])) {
1541 if (patch[plen] == '\n')
1542 add_nl_to_tail = 1;
1543 plen--;
1544 while (0 < plen && isspace(patch[plen]))
1545 plen--;
1546 fixed = 1;
1549 for (i = 1; i < plen; i++) {
1550 char ch = patch[i];
1551 if (ch == '\t') {
1552 last_tab_in_indent = i;
1553 if (0 <= last_space_in_indent)
1554 need_fix_leading_space = 1;
1556 else if (ch == ' ')
1557 last_space_in_indent = i;
1558 else
1559 break;
1562 buf = output;
1563 if (need_fix_leading_space) {
1564 /* between patch[1..last_tab_in_indent] strip the
1565 * funny spaces, updating them to tab as needed.
1567 for (i = 1; i < last_tab_in_indent; i++, plen--) {
1568 char ch = patch[i];
1569 if (ch != ' ')
1570 *output++ = ch;
1571 else if ((i % 8) == 0)
1572 *output++ = '\t';
1574 fixed = 1;
1575 i = last_tab_in_indent;
1577 else
1578 i = 1;
1580 memcpy(output, patch + i, plen);
1581 if (add_nl_to_tail)
1582 output[plen++] = '\n';
1583 if (fixed)
1584 applied_after_stripping++;
1585 return output + plen - buf;
1588 static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag, int inaccurate_eof)
1590 int match_beginning, match_end;
1591 char *buf = desc->buffer;
1592 const char *patch = frag->patch;
1593 int offset, size = frag->size;
1594 char *old = xmalloc(size);
1595 char *new = xmalloc(size);
1596 const char *oldlines, *newlines;
1597 int oldsize = 0, newsize = 0;
1598 unsigned long leading, trailing;
1599 int pos, lines;
1601 while (size > 0) {
1602 char first;
1603 int len = linelen(patch, size);
1604 int plen;
1606 if (!len)
1607 break;
1610 * "plen" is how much of the line we should use for
1611 * the actual patch data. Normally we just remove the
1612 * first character on the line, but if the line is
1613 * followed by "\ No newline", then we also remove the
1614 * last one (which is the newline, of course).
1616 plen = len-1;
1617 if (len < size && patch[len] == '\\')
1618 plen--;
1619 first = *patch;
1620 if (apply_in_reverse) {
1621 if (first == '-')
1622 first = '+';
1623 else if (first == '+')
1624 first = '-';
1626 switch (first) {
1627 case '\n':
1628 /* Newer GNU diff, empty context line */
1629 if (plen < 0)
1630 /* ... followed by '\No newline'; nothing */
1631 break;
1632 old[oldsize++] = '\n';
1633 new[newsize++] = '\n';
1634 break;
1635 case ' ':
1636 case '-':
1637 memcpy(old + oldsize, patch + 1, plen);
1638 oldsize += plen;
1639 if (first == '-')
1640 break;
1641 /* Fall-through for ' ' */
1642 case '+':
1643 if (first != '+' || !no_add)
1644 newsize += apply_line(new + newsize, patch,
1645 plen);
1646 break;
1647 case '@': case '\\':
1648 /* Ignore it, we already handled it */
1649 break;
1650 default:
1651 return -1;
1653 patch += len;
1654 size -= len;
1657 if (inaccurate_eof && oldsize > 0 && old[oldsize - 1] == '\n' &&
1658 newsize > 0 && new[newsize - 1] == '\n') {
1659 oldsize--;
1660 newsize--;
1663 oldlines = old;
1664 newlines = new;
1665 leading = frag->leading;
1666 trailing = frag->trailing;
1669 * If we don't have any leading/trailing data in the patch,
1670 * we want it to match at the beginning/end of the file.
1672 * But that would break if the patch is generated with
1673 * --unified=0; sane people wouldn't do that to cause us
1674 * trouble, but we try to please not so sane ones as well.
1676 if (unidiff_zero) {
1677 match_beginning = (!leading && !frag->oldpos);
1678 match_end = 0;
1680 else {
1681 match_beginning = !leading && (frag->oldpos == 1);
1682 match_end = !trailing;
1685 lines = 0;
1686 pos = frag->newpos;
1687 for (;;) {
1688 offset = find_offset(buf, desc->size,
1689 oldlines, oldsize, pos, &lines);
1690 if (match_end && offset + oldsize != desc->size)
1691 offset = -1;
1692 if (match_beginning && offset)
1693 offset = -1;
1694 if (offset >= 0) {
1695 int diff = newsize - oldsize;
1696 unsigned long size = desc->size + diff;
1697 unsigned long alloc = desc->alloc;
1699 /* Warn if it was necessary to reduce the number
1700 * of context lines.
1702 if ((leading != frag->leading) ||
1703 (trailing != frag->trailing))
1704 fprintf(stderr, "Context reduced to (%ld/%ld)"
1705 " to apply fragment at %d\n",
1706 leading, trailing, pos + lines);
1708 if (size > alloc) {
1709 alloc = size + 8192;
1710 desc->alloc = alloc;
1711 buf = xrealloc(buf, alloc);
1712 desc->buffer = buf;
1714 desc->size = size;
1715 memmove(buf + offset + newsize,
1716 buf + offset + oldsize,
1717 size - offset - newsize);
1718 memcpy(buf + offset, newlines, newsize);
1719 offset = 0;
1721 break;
1724 /* Am I at my context limits? */
1725 if ((leading <= p_context) && (trailing <= p_context))
1726 break;
1727 if (match_beginning || match_end) {
1728 match_beginning = match_end = 0;
1729 continue;
1731 /* Reduce the number of context lines
1732 * Reduce both leading and trailing if they are equal
1733 * otherwise just reduce the larger context.
1735 if (leading >= trailing) {
1736 remove_first_line(&oldlines, &oldsize);
1737 remove_first_line(&newlines, &newsize);
1738 pos--;
1739 leading--;
1741 if (trailing > leading) {
1742 remove_last_line(&oldlines, &oldsize);
1743 remove_last_line(&newlines, &newsize);
1744 trailing--;
1748 free(old);
1749 free(new);
1750 return offset;
1753 static int apply_binary_fragment(struct buffer_desc *desc, struct patch *patch)
1755 unsigned long dst_size;
1756 struct fragment *fragment = patch->fragments;
1757 void *data;
1758 void *result;
1760 /* Binary patch is irreversible without the optional second hunk */
1761 if (apply_in_reverse) {
1762 if (!fragment->next)
1763 return error("cannot reverse-apply a binary patch "
1764 "without the reverse hunk to '%s'",
1765 patch->new_name
1766 ? patch->new_name : patch->old_name);
1767 fragment = fragment->next;
1769 data = (void*) fragment->patch;
1770 switch (fragment->binary_patch_method) {
1771 case BINARY_DELTA_DEFLATED:
1772 result = patch_delta(desc->buffer, desc->size,
1773 data,
1774 fragment->size,
1775 &dst_size);
1776 free(desc->buffer);
1777 desc->buffer = result;
1778 break;
1779 case BINARY_LITERAL_DEFLATED:
1780 free(desc->buffer);
1781 desc->buffer = data;
1782 dst_size = fragment->size;
1783 break;
1785 if (!desc->buffer)
1786 return -1;
1787 desc->size = desc->alloc = dst_size;
1788 return 0;
1791 static int apply_binary(struct buffer_desc *desc, struct patch *patch)
1793 const char *name = patch->old_name ? patch->old_name : patch->new_name;
1794 unsigned char sha1[20];
1796 /* For safety, we require patch index line to contain
1797 * full 40-byte textual SHA1 for old and new, at least for now.
1799 if (strlen(patch->old_sha1_prefix) != 40 ||
1800 strlen(patch->new_sha1_prefix) != 40 ||
1801 get_sha1_hex(patch->old_sha1_prefix, sha1) ||
1802 get_sha1_hex(patch->new_sha1_prefix, sha1))
1803 return error("cannot apply binary patch to '%s' "
1804 "without full index line", name);
1806 if (patch->old_name) {
1807 /* See if the old one matches what the patch
1808 * applies to.
1810 hash_sha1_file(desc->buffer, desc->size, blob_type, sha1);
1811 if (strcmp(sha1_to_hex(sha1), patch->old_sha1_prefix))
1812 return error("the patch applies to '%s' (%s), "
1813 "which does not match the "
1814 "current contents.",
1815 name, sha1_to_hex(sha1));
1817 else {
1818 /* Otherwise, the old one must be empty. */
1819 if (desc->size)
1820 return error("the patch applies to an empty "
1821 "'%s' but it is not empty", name);
1824 get_sha1_hex(patch->new_sha1_prefix, sha1);
1825 if (is_null_sha1(sha1)) {
1826 free(desc->buffer);
1827 desc->alloc = desc->size = 0;
1828 desc->buffer = NULL;
1829 return 0; /* deletion patch */
1832 if (has_sha1_file(sha1)) {
1833 /* We already have the postimage */
1834 char type[10];
1835 unsigned long size;
1837 free(desc->buffer);
1838 desc->buffer = read_sha1_file(sha1, type, &size);
1839 if (!desc->buffer)
1840 return error("the necessary postimage %s for "
1841 "'%s' cannot be read",
1842 patch->new_sha1_prefix, name);
1843 desc->alloc = desc->size = size;
1845 else {
1846 /* We have verified desc matches the preimage;
1847 * apply the patch data to it, which is stored
1848 * in the patch->fragments->{patch,size}.
1850 if (apply_binary_fragment(desc, patch))
1851 return error("binary patch does not apply to '%s'",
1852 name);
1854 /* verify that the result matches */
1855 hash_sha1_file(desc->buffer, desc->size, blob_type, sha1);
1856 if (strcmp(sha1_to_hex(sha1), patch->new_sha1_prefix))
1857 return error("binary patch to '%s' creates incorrect result (expecting %s, got %s)", name, patch->new_sha1_prefix, sha1_to_hex(sha1));
1860 return 0;
1863 static int apply_fragments(struct buffer_desc *desc, struct patch *patch)
1865 struct fragment *frag = patch->fragments;
1866 const char *name = patch->old_name ? patch->old_name : patch->new_name;
1868 if (patch->is_binary)
1869 return apply_binary(desc, patch);
1871 while (frag) {
1872 if (apply_one_fragment(desc, frag, patch->inaccurate_eof)) {
1873 error("patch failed: %s:%ld", name, frag->oldpos);
1874 if (!apply_with_reject)
1875 return -1;
1876 frag->rejected = 1;
1878 frag = frag->next;
1880 return 0;
1883 static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *ce)
1885 char *buf;
1886 unsigned long size, alloc;
1887 struct buffer_desc desc;
1889 size = 0;
1890 alloc = 0;
1891 buf = NULL;
1892 if (cached) {
1893 if (ce) {
1894 char type[20];
1895 buf = read_sha1_file(ce->sha1, type, &size);
1896 if (!buf)
1897 return error("read of %s failed",
1898 patch->old_name);
1899 alloc = size;
1902 else if (patch->old_name) {
1903 size = st->st_size;
1904 alloc = size + 8192;
1905 buf = xmalloc(alloc);
1906 if (read_old_data(st, patch->old_name, buf, alloc) != size)
1907 return error("read of %s failed", patch->old_name);
1910 desc.size = size;
1911 desc.alloc = alloc;
1912 desc.buffer = buf;
1914 if (apply_fragments(&desc, patch) < 0)
1915 return -1; /* note with --reject this succeeds. */
1917 /* NUL terminate the result */
1918 if (desc.alloc <= desc.size)
1919 desc.buffer = xrealloc(desc.buffer, desc.size + 1);
1920 desc.buffer[desc.size] = 0;
1922 patch->result = desc.buffer;
1923 patch->resultsize = desc.size;
1925 if (0 < patch->is_delete && patch->resultsize)
1926 return error("removal patch leaves file contents");
1928 return 0;
1931 static int check_patch(struct patch *patch, struct patch *prev_patch)
1933 struct stat st;
1934 const char *old_name = patch->old_name;
1935 const char *new_name = patch->new_name;
1936 const char *name = old_name ? old_name : new_name;
1937 struct cache_entry *ce = NULL;
1938 int ok_if_exists;
1940 patch->rejected = 1; /* we will drop this after we succeed */
1941 if (old_name) {
1942 int changed = 0;
1943 int stat_ret = 0;
1944 unsigned st_mode = 0;
1946 if (!cached)
1947 stat_ret = lstat(old_name, &st);
1948 if (check_index) {
1949 int pos = cache_name_pos(old_name, strlen(old_name));
1950 if (pos < 0)
1951 return error("%s: does not exist in index",
1952 old_name);
1953 ce = active_cache[pos];
1954 if (stat_ret < 0) {
1955 struct checkout costate;
1956 if (errno != ENOENT)
1957 return error("%s: %s", old_name,
1958 strerror(errno));
1959 /* checkout */
1960 costate.base_dir = "";
1961 costate.base_dir_len = 0;
1962 costate.force = 0;
1963 costate.quiet = 0;
1964 costate.not_new = 0;
1965 costate.refresh_cache = 1;
1966 if (checkout_entry(ce,
1967 &costate,
1968 NULL) ||
1969 lstat(old_name, &st))
1970 return -1;
1972 if (!cached)
1973 changed = ce_match_stat(ce, &st, 1);
1974 if (changed)
1975 return error("%s: does not match index",
1976 old_name);
1977 if (cached)
1978 st_mode = ntohl(ce->ce_mode);
1980 else if (stat_ret < 0)
1981 return error("%s: %s", old_name, strerror(errno));
1983 if (!cached)
1984 st_mode = ntohl(create_ce_mode(st.st_mode));
1986 if (patch->is_new < 0)
1987 patch->is_new = 0;
1988 if (!patch->old_mode)
1989 patch->old_mode = st_mode;
1990 if ((st_mode ^ patch->old_mode) & S_IFMT)
1991 return error("%s: wrong type", old_name);
1992 if (st_mode != patch->old_mode)
1993 fprintf(stderr, "warning: %s has type %o, expected %o\n",
1994 old_name, st_mode, patch->old_mode);
1997 if (new_name && prev_patch && 0 < prev_patch->is_delete &&
1998 !strcmp(prev_patch->old_name, new_name))
1999 /* A type-change diff is always split into a patch to
2000 * delete old, immediately followed by a patch to
2001 * create new (see diff.c::run_diff()); in such a case
2002 * it is Ok that the entry to be deleted by the
2003 * previous patch is still in the working tree and in
2004 * the index.
2006 ok_if_exists = 1;
2007 else
2008 ok_if_exists = 0;
2010 if (new_name &&
2011 ((0 < patch->is_new) | (0 < patch->is_rename) | patch->is_copy)) {
2012 if (check_index &&
2013 cache_name_pos(new_name, strlen(new_name)) >= 0 &&
2014 !ok_if_exists)
2015 return error("%s: already exists in index", new_name);
2016 if (!cached) {
2017 struct stat nst;
2018 if (!lstat(new_name, &nst)) {
2019 if (S_ISDIR(nst.st_mode) || ok_if_exists)
2020 ; /* ok */
2021 else
2022 return error("%s: already exists in working directory", new_name);
2024 else if ((errno != ENOENT) && (errno != ENOTDIR))
2025 return error("%s: %s", new_name, strerror(errno));
2027 if (!patch->new_mode) {
2028 if (0 < patch->is_new)
2029 patch->new_mode = S_IFREG | 0644;
2030 else
2031 patch->new_mode = patch->old_mode;
2035 if (new_name && old_name) {
2036 int same = !strcmp(old_name, new_name);
2037 if (!patch->new_mode)
2038 patch->new_mode = patch->old_mode;
2039 if ((patch->old_mode ^ patch->new_mode) & S_IFMT)
2040 return error("new mode (%o) of %s does not match old mode (%o)%s%s",
2041 patch->new_mode, new_name, patch->old_mode,
2042 same ? "" : " of ", same ? "" : old_name);
2045 if (apply_data(patch, &st, ce) < 0)
2046 return error("%s: patch does not apply", name);
2047 patch->rejected = 0;
2048 return 0;
2051 static int check_patch_list(struct patch *patch)
2053 struct patch *prev_patch = NULL;
2054 int err = 0;
2056 for (prev_patch = NULL; patch ; patch = patch->next) {
2057 if (apply_verbosely)
2058 say_patch_name(stderr,
2059 "Checking patch ", patch, "...\n");
2060 err |= check_patch(patch, prev_patch);
2061 prev_patch = patch;
2063 return err;
2066 static void show_index_list(struct patch *list)
2068 struct patch *patch;
2070 /* Once we start supporting the reverse patch, it may be
2071 * worth showing the new sha1 prefix, but until then...
2073 for (patch = list; patch; patch = patch->next) {
2074 const unsigned char *sha1_ptr;
2075 unsigned char sha1[20];
2076 const char *name;
2078 name = patch->old_name ? patch->old_name : patch->new_name;
2079 if (0 < patch->is_new)
2080 sha1_ptr = null_sha1;
2081 else if (get_sha1(patch->old_sha1_prefix, sha1))
2082 die("sha1 information is lacking or useless (%s).",
2083 name);
2084 else
2085 sha1_ptr = sha1;
2087 printf("%06o %s ",patch->old_mode, sha1_to_hex(sha1_ptr));
2088 if (line_termination && quote_c_style(name, NULL, NULL, 0))
2089 quote_c_style(name, NULL, stdout, 0);
2090 else
2091 fputs(name, stdout);
2092 putchar(line_termination);
2096 static void stat_patch_list(struct patch *patch)
2098 int files, adds, dels;
2100 for (files = adds = dels = 0 ; patch ; patch = patch->next) {
2101 files++;
2102 adds += patch->lines_added;
2103 dels += patch->lines_deleted;
2104 show_stats(patch);
2107 printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files, adds, dels);
2110 static void numstat_patch_list(struct patch *patch)
2112 for ( ; patch; patch = patch->next) {
2113 const char *name;
2114 name = patch->new_name ? patch->new_name : patch->old_name;
2115 printf("%d\t%d\t", patch->lines_added, patch->lines_deleted);
2116 if (line_termination && quote_c_style(name, NULL, NULL, 0))
2117 quote_c_style(name, NULL, stdout, 0);
2118 else
2119 fputs(name, stdout);
2120 putchar(line_termination);
2124 static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name)
2126 if (mode)
2127 printf(" %s mode %06o %s\n", newdelete, mode, name);
2128 else
2129 printf(" %s %s\n", newdelete, name);
2132 static void show_mode_change(struct patch *p, int show_name)
2134 if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) {
2135 if (show_name)
2136 printf(" mode change %06o => %06o %s\n",
2137 p->old_mode, p->new_mode, p->new_name);
2138 else
2139 printf(" mode change %06o => %06o\n",
2140 p->old_mode, p->new_mode);
2144 static void show_rename_copy(struct patch *p)
2146 const char *renamecopy = p->is_rename ? "rename" : "copy";
2147 const char *old, *new;
2149 /* Find common prefix */
2150 old = p->old_name;
2151 new = p->new_name;
2152 while (1) {
2153 const char *slash_old, *slash_new;
2154 slash_old = strchr(old, '/');
2155 slash_new = strchr(new, '/');
2156 if (!slash_old ||
2157 !slash_new ||
2158 slash_old - old != slash_new - new ||
2159 memcmp(old, new, slash_new - new))
2160 break;
2161 old = slash_old + 1;
2162 new = slash_new + 1;
2164 /* p->old_name thru old is the common prefix, and old and new
2165 * through the end of names are renames
2167 if (old != p->old_name)
2168 printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy,
2169 (int)(old - p->old_name), p->old_name,
2170 old, new, p->score);
2171 else
2172 printf(" %s %s => %s (%d%%)\n", renamecopy,
2173 p->old_name, p->new_name, p->score);
2174 show_mode_change(p, 0);
2177 static void summary_patch_list(struct patch *patch)
2179 struct patch *p;
2181 for (p = patch; p; p = p->next) {
2182 if (p->is_new)
2183 show_file_mode_name("create", p->new_mode, p->new_name);
2184 else if (p->is_delete)
2185 show_file_mode_name("delete", p->old_mode, p->old_name);
2186 else {
2187 if (p->is_rename || p->is_copy)
2188 show_rename_copy(p);
2189 else {
2190 if (p->score) {
2191 printf(" rewrite %s (%d%%)\n",
2192 p->new_name, p->score);
2193 show_mode_change(p, 0);
2195 else
2196 show_mode_change(p, 1);
2202 static void patch_stats(struct patch *patch)
2204 int lines = patch->lines_added + patch->lines_deleted;
2206 if (lines > max_change)
2207 max_change = lines;
2208 if (patch->old_name) {
2209 int len = quote_c_style(patch->old_name, NULL, NULL, 0);
2210 if (!len)
2211 len = strlen(patch->old_name);
2212 if (len > max_len)
2213 max_len = len;
2215 if (patch->new_name) {
2216 int len = quote_c_style(patch->new_name, NULL, NULL, 0);
2217 if (!len)
2218 len = strlen(patch->new_name);
2219 if (len > max_len)
2220 max_len = len;
2224 static void remove_file(struct patch *patch)
2226 if (write_index) {
2227 if (remove_file_from_cache(patch->old_name) < 0)
2228 die("unable to remove %s from index", patch->old_name);
2229 cache_tree_invalidate_path(active_cache_tree, patch->old_name);
2231 if (!cached)
2232 unlink(patch->old_name);
2235 static void add_index_file(const char *path, unsigned mode, void *buf, unsigned long size)
2237 struct stat st;
2238 struct cache_entry *ce;
2239 int namelen = strlen(path);
2240 unsigned ce_size = cache_entry_size(namelen);
2242 if (!write_index)
2243 return;
2245 ce = xcalloc(1, ce_size);
2246 memcpy(ce->name, path, namelen);
2247 ce->ce_mode = create_ce_mode(mode);
2248 ce->ce_flags = htons(namelen);
2249 if (!cached) {
2250 if (lstat(path, &st) < 0)
2251 die("unable to stat newly created file %s", path);
2252 fill_stat_cache_info(ce, &st);
2254 if (write_sha1_file(buf, size, blob_type, ce->sha1) < 0)
2255 die("unable to create backing store for newly created file %s", path);
2256 if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0)
2257 die("unable to add cache entry for %s", path);
2260 static int try_create_file(const char *path, unsigned int mode, const char *buf, unsigned long size)
2262 int fd;
2264 if (S_ISLNK(mode))
2265 /* Although buf:size is counted string, it also is NUL
2266 * terminated.
2268 return symlink(buf, path);
2269 fd = open(path, O_CREAT | O_EXCL | O_WRONLY, (mode & 0100) ? 0777 : 0666);
2270 if (fd < 0)
2271 return -1;
2272 while (size) {
2273 int written = xwrite(fd, buf, size);
2274 if (written < 0)
2275 die("writing file %s: %s", path, strerror(errno));
2276 if (!written)
2277 die("out of space writing file %s", path);
2278 buf += written;
2279 size -= written;
2281 if (close(fd) < 0)
2282 die("closing file %s: %s", path, strerror(errno));
2283 return 0;
2287 * We optimistically assume that the directories exist,
2288 * which is true 99% of the time anyway. If they don't,
2289 * we create them and try again.
2291 static void create_one_file(char *path, unsigned mode, const char *buf, unsigned long size)
2293 if (cached)
2294 return;
2295 if (!try_create_file(path, mode, buf, size))
2296 return;
2298 if (errno == ENOENT) {
2299 if (safe_create_leading_directories(path))
2300 return;
2301 if (!try_create_file(path, mode, buf, size))
2302 return;
2305 if (errno == EEXIST || errno == EACCES) {
2306 /* We may be trying to create a file where a directory
2307 * used to be.
2309 struct stat st;
2310 errno = 0;
2311 if (!lstat(path, &st) && S_ISDIR(st.st_mode) && !rmdir(path))
2312 errno = EEXIST;
2315 if (errno == EEXIST) {
2316 unsigned int nr = getpid();
2318 for (;;) {
2319 const char *newpath;
2320 newpath = mkpath("%s~%u", path, nr);
2321 if (!try_create_file(newpath, mode, buf, size)) {
2322 if (!rename(newpath, path))
2323 return;
2324 unlink(newpath);
2325 break;
2327 if (errno != EEXIST)
2328 break;
2329 ++nr;
2332 die("unable to write file %s mode %o", path, mode);
2335 static void create_file(struct patch *patch)
2337 char *path = patch->new_name;
2338 unsigned mode = patch->new_mode;
2339 unsigned long size = patch->resultsize;
2340 char *buf = patch->result;
2342 if (!mode)
2343 mode = S_IFREG | 0644;
2344 create_one_file(path, mode, buf, size);
2345 add_index_file(path, mode, buf, size);
2346 cache_tree_invalidate_path(active_cache_tree, path);
2349 /* phase zero is to remove, phase one is to create */
2350 static void write_out_one_result(struct patch *patch, int phase)
2352 if (patch->is_delete > 0) {
2353 if (phase == 0)
2354 remove_file(patch);
2355 return;
2357 if (patch->is_new > 0 || patch->is_copy) {
2358 if (phase == 1)
2359 create_file(patch);
2360 return;
2363 * Rename or modification boils down to the same
2364 * thing: remove the old, write the new
2366 if (phase == 0)
2367 remove_file(patch);
2368 if (phase == 1)
2369 create_file(patch);
2372 static int write_out_one_reject(struct patch *patch)
2374 FILE *rej;
2375 char namebuf[PATH_MAX];
2376 struct fragment *frag;
2377 int cnt = 0;
2379 for (cnt = 0, frag = patch->fragments; frag; frag = frag->next) {
2380 if (!frag->rejected)
2381 continue;
2382 cnt++;
2385 if (!cnt) {
2386 if (apply_verbosely)
2387 say_patch_name(stderr,
2388 "Applied patch ", patch, " cleanly.\n");
2389 return 0;
2392 /* This should not happen, because a removal patch that leaves
2393 * contents are marked "rejected" at the patch level.
2395 if (!patch->new_name)
2396 die("internal error");
2398 /* Say this even without --verbose */
2399 say_patch_name(stderr, "Applying patch ", patch, " with");
2400 fprintf(stderr, " %d rejects...\n", cnt);
2402 cnt = strlen(patch->new_name);
2403 if (ARRAY_SIZE(namebuf) <= cnt + 5) {
2404 cnt = ARRAY_SIZE(namebuf) - 5;
2405 fprintf(stderr,
2406 "warning: truncating .rej filename to %.*s.rej",
2407 cnt - 1, patch->new_name);
2409 memcpy(namebuf, patch->new_name, cnt);
2410 memcpy(namebuf + cnt, ".rej", 5);
2412 rej = fopen(namebuf, "w");
2413 if (!rej)
2414 return error("cannot open %s: %s", namebuf, strerror(errno));
2416 /* Normal git tools never deal with .rej, so do not pretend
2417 * this is a git patch by saying --git nor give extended
2418 * headers. While at it, maybe please "kompare" that wants
2419 * the trailing TAB and some garbage at the end of line ;-).
2421 fprintf(rej, "diff a/%s b/%s\t(rejected hunks)\n",
2422 patch->new_name, patch->new_name);
2423 for (cnt = 1, frag = patch->fragments;
2424 frag;
2425 cnt++, frag = frag->next) {
2426 if (!frag->rejected) {
2427 fprintf(stderr, "Hunk #%d applied cleanly.\n", cnt);
2428 continue;
2430 fprintf(stderr, "Rejected hunk #%d.\n", cnt);
2431 fprintf(rej, "%.*s", frag->size, frag->patch);
2432 if (frag->patch[frag->size-1] != '\n')
2433 fputc('\n', rej);
2435 fclose(rej);
2436 return -1;
2439 static int write_out_results(struct patch *list, int skipped_patch)
2441 int phase;
2442 int errs = 0;
2443 struct patch *l;
2445 if (!list && !skipped_patch)
2446 return error("No changes");
2448 for (phase = 0; phase < 2; phase++) {
2449 l = list;
2450 while (l) {
2451 if (l->rejected)
2452 errs = 1;
2453 else {
2454 write_out_one_result(l, phase);
2455 if (phase == 1 && write_out_one_reject(l))
2456 errs = 1;
2458 l = l->next;
2461 return errs;
2464 static struct lock_file lock_file;
2466 static struct excludes {
2467 struct excludes *next;
2468 const char *path;
2469 } *excludes;
2471 static int use_patch(struct patch *p)
2473 const char *pathname = p->new_name ? p->new_name : p->old_name;
2474 struct excludes *x = excludes;
2475 while (x) {
2476 if (fnmatch(x->path, pathname, 0) == 0)
2477 return 0;
2478 x = x->next;
2480 if (0 < prefix_length) {
2481 int pathlen = strlen(pathname);
2482 if (pathlen <= prefix_length ||
2483 memcmp(prefix, pathname, prefix_length))
2484 return 0;
2486 return 1;
2489 static int apply_patch(int fd, const char *filename, int inaccurate_eof)
2491 unsigned long offset, size;
2492 char *buffer = read_patch_file(fd, &size);
2493 struct patch *list = NULL, **listp = &list;
2494 int skipped_patch = 0;
2496 patch_input_file = filename;
2497 if (!buffer)
2498 return -1;
2499 offset = 0;
2500 while (size > 0) {
2501 struct patch *patch;
2502 int nr;
2504 patch = xcalloc(1, sizeof(*patch));
2505 patch->inaccurate_eof = inaccurate_eof;
2506 nr = parse_chunk(buffer + offset, size, patch);
2507 if (nr < 0)
2508 break;
2509 if (apply_in_reverse)
2510 reverse_patches(patch);
2511 if (use_patch(patch)) {
2512 patch_stats(patch);
2513 *listp = patch;
2514 listp = &patch->next;
2515 } else {
2516 /* perhaps free it a bit better? */
2517 free(patch);
2518 skipped_patch++;
2520 offset += nr;
2521 size -= nr;
2524 if (whitespace_error && (new_whitespace == error_on_whitespace))
2525 apply = 0;
2527 write_index = check_index && apply;
2528 if (write_index && newfd < 0)
2529 newfd = hold_lock_file_for_update(&lock_file,
2530 get_index_file(), 1);
2531 if (check_index) {
2532 if (read_cache() < 0)
2533 die("unable to read index file");
2536 if ((check || apply) &&
2537 check_patch_list(list) < 0 &&
2538 !apply_with_reject)
2539 exit(1);
2541 if (apply && write_out_results(list, skipped_patch))
2542 exit(1);
2544 if (show_index_info)
2545 show_index_list(list);
2547 if (diffstat)
2548 stat_patch_list(list);
2550 if (numstat)
2551 numstat_patch_list(list);
2553 if (summary)
2554 summary_patch_list(list);
2556 free(buffer);
2557 return 0;
2560 static int git_apply_config(const char *var, const char *value)
2562 if (!strcmp(var, "apply.whitespace")) {
2563 apply_default_whitespace = xstrdup(value);
2564 return 0;
2566 return git_default_config(var, value);
2570 int cmd_apply(int argc, const char **argv, const char *prefix)
2572 int i;
2573 int read_stdin = 1;
2574 int inaccurate_eof = 0;
2575 int errs = 0;
2577 const char *whitespace_option = NULL;
2579 for (i = 1; i < argc; i++) {
2580 const char *arg = argv[i];
2581 char *end;
2582 int fd;
2584 if (!strcmp(arg, "-")) {
2585 errs |= apply_patch(0, "<stdin>", inaccurate_eof);
2586 read_stdin = 0;
2587 continue;
2589 if (!strncmp(arg, "--exclude=", 10)) {
2590 struct excludes *x = xmalloc(sizeof(*x));
2591 x->path = arg + 10;
2592 x->next = excludes;
2593 excludes = x;
2594 continue;
2596 if (!strncmp(arg, "-p", 2)) {
2597 p_value = atoi(arg + 2);
2598 continue;
2600 if (!strcmp(arg, "--no-add")) {
2601 no_add = 1;
2602 continue;
2604 if (!strcmp(arg, "--stat")) {
2605 apply = 0;
2606 diffstat = 1;
2607 continue;
2609 if (!strcmp(arg, "--allow-binary-replacement") ||
2610 !strcmp(arg, "--binary")) {
2611 continue; /* now no-op */
2613 if (!strcmp(arg, "--numstat")) {
2614 apply = 0;
2615 numstat = 1;
2616 continue;
2618 if (!strcmp(arg, "--summary")) {
2619 apply = 0;
2620 summary = 1;
2621 continue;
2623 if (!strcmp(arg, "--check")) {
2624 apply = 0;
2625 check = 1;
2626 continue;
2628 if (!strcmp(arg, "--index")) {
2629 check_index = 1;
2630 continue;
2632 if (!strcmp(arg, "--cached")) {
2633 check_index = 1;
2634 cached = 1;
2635 continue;
2637 if (!strcmp(arg, "--apply")) {
2638 apply = 1;
2639 continue;
2641 if (!strcmp(arg, "--index-info")) {
2642 apply = 0;
2643 show_index_info = 1;
2644 continue;
2646 if (!strcmp(arg, "-z")) {
2647 line_termination = 0;
2648 continue;
2650 if (!strncmp(arg, "-C", 2)) {
2651 p_context = strtoul(arg + 2, &end, 0);
2652 if (*end != '\0')
2653 die("unrecognized context count '%s'", arg + 2);
2654 continue;
2656 if (!strncmp(arg, "--whitespace=", 13)) {
2657 whitespace_option = arg + 13;
2658 parse_whitespace_option(arg + 13);
2659 continue;
2661 if (!strcmp(arg, "-R") || !strcmp(arg, "--reverse")) {
2662 apply_in_reverse = 1;
2663 continue;
2665 if (!strcmp(arg, "--unidiff-zero")) {
2666 unidiff_zero = 1;
2667 continue;
2669 if (!strcmp(arg, "--reject")) {
2670 apply = apply_with_reject = apply_verbosely = 1;
2671 continue;
2673 if (!strcmp(arg, "--verbose")) {
2674 apply_verbosely = 1;
2675 continue;
2677 if (!strcmp(arg, "--inaccurate-eof")) {
2678 inaccurate_eof = 1;
2679 continue;
2682 if (check_index && prefix_length < 0) {
2683 prefix = setup_git_directory();
2684 prefix_length = prefix ? strlen(prefix) : 0;
2685 git_config(git_apply_config);
2686 if (!whitespace_option && apply_default_whitespace)
2687 parse_whitespace_option(apply_default_whitespace);
2689 if (0 < prefix_length)
2690 arg = prefix_filename(prefix, prefix_length, arg);
2692 fd = open(arg, O_RDONLY);
2693 if (fd < 0)
2694 usage(apply_usage);
2695 read_stdin = 0;
2696 set_default_whitespace_mode(whitespace_option);
2697 errs |= apply_patch(fd, arg, inaccurate_eof);
2698 close(fd);
2700 set_default_whitespace_mode(whitespace_option);
2701 if (read_stdin)
2702 errs |= apply_patch(0, "<stdin>", inaccurate_eof);
2703 if (whitespace_error) {
2704 if (squelch_whitespace_errors &&
2705 squelch_whitespace_errors < whitespace_error) {
2706 int squelched =
2707 whitespace_error - squelch_whitespace_errors;
2708 fprintf(stderr, "warning: squelched %d "
2709 "whitespace error%s\n",
2710 squelched,
2711 squelched == 1 ? "" : "s");
2713 if (new_whitespace == error_on_whitespace)
2714 die("%d line%s add%s trailing whitespaces.",
2715 whitespace_error,
2716 whitespace_error == 1 ? "" : "s",
2717 whitespace_error == 1 ? "s" : "");
2718 if (applied_after_stripping)
2719 fprintf(stderr, "warning: %d line%s applied after"
2720 " stripping trailing whitespaces.\n",
2721 applied_after_stripping,
2722 applied_after_stripping == 1 ? "" : "s");
2723 else if (whitespace_error)
2724 fprintf(stderr, "warning: %d line%s add%s trailing"
2725 " whitespaces.\n",
2726 whitespace_error,
2727 whitespace_error == 1 ? "" : "s",
2728 whitespace_error == 1 ? "s" : "");
2731 if (write_index) {
2732 if (write_cache(newfd, active_cache, active_nr) ||
2733 close(newfd) || commit_lock_file(&lock_file))
2734 die("Unable to write new index file");
2737 return !!errs;