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Commit | Line | Data |
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c1bb9350 LT |
1 | /* |
2 | * apply.c | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | * | |
6 | * This applies patches on top of some (arbitrary) version of the SCM. | |
7 | * | |
c1bb9350 | 8 | */ |
d854f783 | 9 | #include <fnmatch.h> |
c1bb9350 | 10 | #include "cache.h" |
03ac6e64 | 11 | #include "cache-tree.h" |
22943f1a | 12 | #include "quote.h" |
8e440259 | 13 | #include "blob.h" |
051308f6 | 14 | #include "delta.h" |
ac6245e3 | 15 | #include "builtin.h" |
c1bb9350 | 16 | |
a9486b02 PR |
17 | /* |
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. | |
25 | */ | |
edf2e370 JH |
26 | static const char *prefix; |
27 | static int prefix_length = -1; | |
dbd0f7d3 | 28 | static int newfd = -1; |
edf2e370 | 29 | |
e36f8b60 | 30 | static int p_value = 1; |
96f1e58f DR |
31 | static int allow_binary_replacement; |
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; | |
a577284a | 39 | static int apply = 1; |
96f1e58f | 40 | static int apply_in_reverse; |
57dc397c | 41 | static int apply_with_reject; |
a2bf404e | 42 | static int apply_verbosely; |
96f1e58f DR |
43 | static int no_add; |
44 | static int show_index_info; | |
22943f1a | 45 | static int line_termination = '\n'; |
47495887 | 46 | static unsigned long p_context = -1; |
12dd6e8c | 47 | static const char apply_usage[] = |
a2bf404e | 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>..."; |
c1bb9350 | 49 | |
19bfcd5a | 50 | static enum whitespace_eol { |
2ae1c53b | 51 | nowarn_whitespace, |
19bfcd5a | 52 | warn_on_whitespace, |
b5767dd6 | 53 | error_on_whitespace, |
2ae1c53b | 54 | strip_whitespace, |
621603b7 | 55 | } new_whitespace = warn_on_whitespace; |
96f1e58f | 56 | static int whitespace_error; |
fc96b7c9 | 57 | static int squelch_whitespace_errors = 5; |
96f1e58f DR |
58 | static int applied_after_stripping; |
59 | static const char *patch_input_file; | |
19bfcd5a | 60 | |
2ae1c53b JH |
61 | static void parse_whitespace_option(const char *option) |
62 | { | |
63 | if (!option) { | |
621603b7 | 64 | new_whitespace = warn_on_whitespace; |
2ae1c53b JH |
65 | return; |
66 | } | |
67 | if (!strcmp(option, "warn")) { | |
68 | new_whitespace = warn_on_whitespace; | |
69 | return; | |
70 | } | |
621603b7 JH |
71 | if (!strcmp(option, "nowarn")) { |
72 | new_whitespace = nowarn_whitespace; | |
73 | return; | |
74 | } | |
2ae1c53b JH |
75 | if (!strcmp(option, "error")) { |
76 | new_whitespace = error_on_whitespace; | |
77 | return; | |
78 | } | |
79 | if (!strcmp(option, "error-all")) { | |
80 | new_whitespace = error_on_whitespace; | |
81 | squelch_whitespace_errors = 0; | |
82 | return; | |
83 | } | |
84 | if (!strcmp(option, "strip")) { | |
85 | new_whitespace = strip_whitespace; | |
86 | return; | |
87 | } | |
88 | die("unrecognized whitespace option '%s'", option); | |
89 | } | |
90 | ||
f21d6726 JH |
91 | static void set_default_whitespace_mode(const char *whitespace_option) |
92 | { | |
93 | if (!whitespace_option && !apply_default_whitespace) { | |
94 | new_whitespace = (apply | |
95 | ? warn_on_whitespace | |
96 | : nowarn_whitespace); | |
97 | } | |
98 | } | |
99 | ||
3f40315a LT |
100 | /* |
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. | |
104 | */ | |
105 | static int max_change, max_len; | |
106 | ||
a4acb0eb LT |
107 | /* |
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". | |
111 | */ | |
46979f56 | 112 | static int linenr = 1; |
19c58fb8 | 113 | |
3cd4f5e8 JH |
114 | /* |
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. | |
120 | */ | |
19c58fb8 | 121 | struct fragment { |
47495887 | 122 | unsigned long leading, trailing; |
19c58fb8 LT |
123 | unsigned long oldpos, oldlines; |
124 | unsigned long newpos, newlines; | |
125 | const char *patch; | |
126 | int size; | |
57dc397c | 127 | int rejected; |
19c58fb8 LT |
128 | struct fragment *next; |
129 | }; | |
130 | ||
3cd4f5e8 JH |
131 | /* |
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". | |
135 | */ | |
136 | #define binary_patch_method leading | |
137 | #define BINARY_DELTA_DEFLATED 1 | |
138 | #define BINARY_LITERAL_DEFLATED 2 | |
139 | ||
19c58fb8 | 140 | struct patch { |
5041aa70 | 141 | char *new_name, *old_name, *def_name; |
19c58fb8 | 142 | unsigned int old_mode, new_mode; |
f686d030 | 143 | int is_rename, is_copy, is_new, is_delete, is_binary; |
57dc397c | 144 | int rejected; |
0660626c | 145 | unsigned long deflate_origlen; |
3f40315a | 146 | int lines_added, lines_deleted; |
96c912a4 | 147 | int score; |
3eaa38da | 148 | int inaccurate_eof:1; |
19c58fb8 | 149 | struct fragment *fragments; |
5aa7d94c | 150 | char *result; |
3cca928d | 151 | unsigned long resultsize; |
2cf67f1e JH |
152 | char old_sha1_prefix[41]; |
153 | char new_sha1_prefix[41]; | |
19c58fb8 LT |
154 | struct patch *next; |
155 | }; | |
46979f56 | 156 | |
a2bf404e JH |
157 | static void say_patch_name(FILE *output, const char *pre, struct patch *patch, const char *post) |
158 | { | |
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); | |
165 | } | |
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); | |
171 | } | |
172 | fputs(post, output); | |
173 | } | |
174 | ||
c1bb9350 | 175 | #define CHUNKSIZE (8192) |
a4acb0eb | 176 | #define SLOP (16) |
c1bb9350 LT |
177 | |
178 | static void *read_patch_file(int fd, unsigned long *sizep) | |
179 | { | |
180 | unsigned long size = 0, alloc = CHUNKSIZE; | |
181 | void *buffer = xmalloc(alloc); | |
182 | ||
183 | for (;;) { | |
184 | int nr = alloc - size; | |
185 | if (nr < 1024) { | |
186 | alloc += CHUNKSIZE; | |
187 | buffer = xrealloc(buffer, alloc); | |
188 | nr = alloc - size; | |
189 | } | |
1d7f171c | 190 | nr = xread(fd, (char *) buffer + size, nr); |
c1bb9350 LT |
191 | if (!nr) |
192 | break; | |
1c15afb9 | 193 | if (nr < 0) |
c1bb9350 | 194 | die("git-apply: read returned %s", strerror(errno)); |
c1bb9350 LT |
195 | size += nr; |
196 | } | |
197 | *sizep = size; | |
a4acb0eb LT |
198 | |
199 | /* | |
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. | |
203 | */ | |
204 | if (alloc < size + SLOP) | |
205 | buffer = xrealloc(buffer, size + SLOP); | |
1d7f171c | 206 | memset((char *) buffer + size, 0, SLOP); |
c1bb9350 LT |
207 | return buffer; |
208 | } | |
209 | ||
3cca928d | 210 | static unsigned long linelen(const char *buffer, unsigned long size) |
c1bb9350 LT |
211 | { |
212 | unsigned long len = 0; | |
213 | while (size--) { | |
214 | len++; | |
215 | if (*buffer++ == '\n') | |
216 | break; | |
217 | } | |
218 | return len; | |
219 | } | |
220 | ||
a4acb0eb LT |
221 | static int is_dev_null(const char *str) |
222 | { | |
223 | return !memcmp("/dev/null", str, 9) && isspace(str[9]); | |
224 | } | |
225 | ||
381ca9a3 LT |
226 | #define TERM_SPACE 1 |
227 | #define TERM_TAB 2 | |
9a4a100e LT |
228 | |
229 | static int name_terminate(const char *name, int namelen, int c, int terminate) | |
230 | { | |
231 | if (c == ' ' && !(terminate & TERM_SPACE)) | |
232 | return 0; | |
233 | if (c == '\t' && !(terminate & TERM_TAB)) | |
234 | return 0; | |
235 | ||
9a4a100e LT |
236 | return 1; |
237 | } | |
238 | ||
239 | static char * find_name(const char *line, char *def, int p_value, int terminate) | |
c1bb9350 | 240 | { |
a4acb0eb LT |
241 | int len; |
242 | const char *start = line; | |
243 | char *name; | |
244 | ||
22943f1a JH |
245 | if (*line == '"') { |
246 | /* Proposed "new-style" GNU patch/diff format; see | |
247 | * http://marc.theaimsgroup.com/?l=git&m=112927316408690&w=2 | |
248 | */ | |
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--; | |
258 | } | |
259 | if (cp) { | |
260 | /* name can later be freed, so we need | |
261 | * to memmove, not just return cp | |
262 | */ | |
263 | memmove(name, cp, strlen(cp) + 1); | |
264 | free(def); | |
265 | return name; | |
266 | } | |
267 | else { | |
268 | free(name); | |
269 | name = NULL; | |
270 | } | |
271 | } | |
272 | } | |
273 | ||
c1bb9350 | 274 | for (;;) { |
a4acb0eb | 275 | char c = *line; |
9a4a100e LT |
276 | |
277 | if (isspace(c)) { | |
278 | if (c == '\n') | |
279 | break; | |
280 | if (name_terminate(start, line-start, c, terminate)) | |
281 | break; | |
282 | } | |
a4acb0eb LT |
283 | line++; |
284 | if (c == '/' && !--p_value) | |
285 | start = line; | |
286 | } | |
287 | if (!start) | |
288 | return def; | |
289 | len = line - start; | |
290 | if (!len) | |
291 | return def; | |
292 | ||
293 | /* | |
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~"). | |
298 | */ | |
299 | if (def) { | |
300 | int deflen = strlen(def); | |
301 | if (deflen < len && !strncmp(start, def, deflen)) | |
302 | return def; | |
c1bb9350 | 303 | } |
a4acb0eb LT |
304 | |
305 | name = xmalloc(len + 1); | |
306 | memcpy(name, start, len); | |
307 | name[len] = 0; | |
308 | free(def); | |
309 | return name; | |
310 | } | |
311 | ||
312 | /* | |
313 | * Get the name etc info from the --/+++ lines of a traditional patch header | |
314 | * | |
315 | * NOTE! This hardcodes "-p1" behaviour in filename detection. | |
9a4a100e LT |
316 | * |
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. | |
a4acb0eb | 320 | */ |
19c58fb8 | 321 | static void parse_traditional_patch(const char *first, const char *second, struct patch *patch) |
a4acb0eb | 322 | { |
a4acb0eb LT |
323 | char *name; |
324 | ||
a9486b02 PR |
325 | first += 4; /* skip "--- " */ |
326 | second += 4; /* skip "+++ " */ | |
a4acb0eb | 327 | if (is_dev_null(first)) { |
19c58fb8 LT |
328 | patch->is_new = 1; |
329 | patch->is_delete = 0; | |
5041aa70 | 330 | name = find_name(second, NULL, p_value, TERM_SPACE | TERM_TAB); |
19c58fb8 | 331 | patch->new_name = name; |
a4acb0eb | 332 | } else if (is_dev_null(second)) { |
19c58fb8 LT |
333 | patch->is_new = 0; |
334 | patch->is_delete = 1; | |
381ca9a3 | 335 | name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB); |
19c58fb8 | 336 | patch->old_name = name; |
a4acb0eb | 337 | } else { |
381ca9a3 LT |
338 | name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB); |
339 | name = find_name(second, name, p_value, TERM_SPACE | TERM_TAB); | |
19c58fb8 | 340 | patch->old_name = patch->new_name = name; |
a4acb0eb LT |
341 | } |
342 | if (!name) | |
343 | die("unable to find filename in patch at line %d", linenr); | |
a4acb0eb LT |
344 | } |
345 | ||
19c58fb8 | 346 | static int gitdiff_hdrend(const char *line, struct patch *patch) |
a4acb0eb LT |
347 | { |
348 | return -1; | |
349 | } | |
350 | ||
1e3f6b6e LT |
351 | /* |
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. | |
355 | * | |
356 | * As a result, gitdiff_{old|new}name() will check | |
357 | * their names against any previous information, just | |
358 | * to make sure.. | |
359 | */ | |
360 | static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, const char *oldnew) | |
361 | { | |
1e3f6b6e LT |
362 | if (!orig_name && !isnull) |
363 | return find_name(line, NULL, 1, 0); | |
364 | ||
1e3f6b6e | 365 | if (orig_name) { |
22943f1a JH |
366 | int len; |
367 | const char *name; | |
368 | char *another; | |
1e3f6b6e LT |
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); | |
22943f1a JH |
373 | another = find_name(line, NULL, 1, 0); |
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); | |
1e3f6b6e LT |
377 | return orig_name; |
378 | } | |
22943f1a JH |
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; | |
384 | } | |
1e3f6b6e LT |
385 | } |
386 | ||
19c58fb8 | 387 | static int gitdiff_oldname(const char *line, struct patch *patch) |
a4acb0eb | 388 | { |
19c58fb8 | 389 | patch->old_name = gitdiff_verify_name(line, patch->is_new, patch->old_name, "old"); |
a4acb0eb LT |
390 | return 0; |
391 | } | |
392 | ||
19c58fb8 | 393 | static int gitdiff_newname(const char *line, struct patch *patch) |
a4acb0eb | 394 | { |
19c58fb8 | 395 | patch->new_name = gitdiff_verify_name(line, patch->is_delete, patch->new_name, "new"); |
a4acb0eb LT |
396 | return 0; |
397 | } | |
398 | ||
19c58fb8 | 399 | static int gitdiff_oldmode(const char *line, struct patch *patch) |
a4acb0eb | 400 | { |
19c58fb8 | 401 | patch->old_mode = strtoul(line, NULL, 8); |
a4acb0eb LT |
402 | return 0; |
403 | } | |
404 | ||
19c58fb8 | 405 | static int gitdiff_newmode(const char *line, struct patch *patch) |
a4acb0eb | 406 | { |
19c58fb8 | 407 | patch->new_mode = strtoul(line, NULL, 8); |
a4acb0eb LT |
408 | return 0; |
409 | } | |
410 | ||
19c58fb8 | 411 | static int gitdiff_delete(const char *line, struct patch *patch) |
a4acb0eb | 412 | { |
19c58fb8 | 413 | patch->is_delete = 1; |
5041aa70 | 414 | patch->old_name = patch->def_name; |
19c58fb8 | 415 | return gitdiff_oldmode(line, patch); |
a4acb0eb LT |
416 | } |
417 | ||
19c58fb8 | 418 | static int gitdiff_newfile(const char *line, struct patch *patch) |
a4acb0eb | 419 | { |
19c58fb8 | 420 | patch->is_new = 1; |
5041aa70 | 421 | patch->new_name = patch->def_name; |
19c58fb8 | 422 | return gitdiff_newmode(line, patch); |
a4acb0eb LT |
423 | } |
424 | ||
19c58fb8 | 425 | static int gitdiff_copysrc(const char *line, struct patch *patch) |
a4acb0eb | 426 | { |
19c58fb8 LT |
427 | patch->is_copy = 1; |
428 | patch->old_name = find_name(line, NULL, 0, 0); | |
a4acb0eb LT |
429 | return 0; |
430 | } | |
431 | ||
19c58fb8 | 432 | static int gitdiff_copydst(const char *line, struct patch *patch) |
a4acb0eb | 433 | { |
19c58fb8 LT |
434 | patch->is_copy = 1; |
435 | patch->new_name = find_name(line, NULL, 0, 0); | |
a4acb0eb LT |
436 | return 0; |
437 | } | |
438 | ||
19c58fb8 | 439 | static int gitdiff_renamesrc(const char *line, struct patch *patch) |
a4acb0eb | 440 | { |
19c58fb8 LT |
441 | patch->is_rename = 1; |
442 | patch->old_name = find_name(line, NULL, 0, 0); | |
a4acb0eb LT |
443 | return 0; |
444 | } | |
445 | ||
19c58fb8 | 446 | static int gitdiff_renamedst(const char *line, struct patch *patch) |
a4acb0eb | 447 | { |
19c58fb8 LT |
448 | patch->is_rename = 1; |
449 | patch->new_name = find_name(line, NULL, 0, 0); | |
a4acb0eb LT |
450 | return 0; |
451 | } | |
452 | ||
19c58fb8 | 453 | static int gitdiff_similarity(const char *line, struct patch *patch) |
a4acb0eb | 454 | { |
96c912a4 JH |
455 | if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX) |
456 | patch->score = 0; | |
a4acb0eb | 457 | return 0; |
c1bb9350 LT |
458 | } |
459 | ||
70aadac0 JH |
460 | static int gitdiff_dissimilarity(const char *line, struct patch *patch) |
461 | { | |
96c912a4 JH |
462 | if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX) |
463 | patch->score = 0; | |
70aadac0 JH |
464 | return 0; |
465 | } | |
466 | ||
2cf67f1e JH |
467 | static int gitdiff_index(const char *line, struct patch *patch) |
468 | { | |
469 | /* index line is N hexadecimal, "..", N hexadecimal, | |
470 | * and optional space with octal mode. | |
471 | */ | |
472 | const char *ptr, *eol; | |
473 | int len; | |
474 | ||
475 | ptr = strchr(line, '.'); | |
9add69b1 | 476 | if (!ptr || ptr[1] != '.' || 40 < ptr - line) |
2cf67f1e JH |
477 | return 0; |
478 | len = ptr - line; | |
479 | memcpy(patch->old_sha1_prefix, line, len); | |
480 | patch->old_sha1_prefix[len] = 0; | |
481 | ||
482 | line = ptr + 2; | |
483 | ptr = strchr(line, ' '); | |
484 | eol = strchr(line, '\n'); | |
485 | ||
486 | if (!ptr || eol < ptr) | |
487 | ptr = eol; | |
488 | len = ptr - line; | |
489 | ||
9add69b1 | 490 | if (40 < len) |
2cf67f1e JH |
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; | |
497 | } | |
498 | ||
9a4a100e LT |
499 | /* |
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. | |
502 | */ | |
19c58fb8 | 503 | static int gitdiff_unrecognized(const char *line, struct patch *patch) |
9a4a100e LT |
504 | { |
505 | return -1; | |
506 | } | |
507 | ||
22943f1a JH |
508 | static const char *stop_at_slash(const char *line, int llen) |
509 | { | |
510 | int i; | |
511 | ||
512 | for (i = 0; i < llen; i++) { | |
513 | int ch = line[i]; | |
514 | if (ch == '/') | |
515 | return line + i; | |
516 | } | |
517 | return NULL; | |
518 | } | |
519 | ||
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. | |
526 | */ | |
527 | static char *git_header_name(char *line, int llen) | |
5041aa70 LT |
528 | { |
529 | int len; | |
22943f1a JH |
530 | const char *name; |
531 | const char *second = NULL; | |
5041aa70 | 532 | |
22943f1a JH |
533 | line += strlen("diff --git "); |
534 | llen -= strlen("diff --git "); | |
535 | ||
536 | if (*line == '"') { | |
537 | const char *cp; | |
538 | char *first = unquote_c_style(line, &second); | |
539 | if (!first) | |
5041aa70 | 540 | return NULL; |
22943f1a JH |
541 | |
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; | |
549 | } | |
550 | len = strlen(cp+1); | |
551 | memmove(first, cp+1, len+1); /* including NUL */ | |
552 | ||
553 | /* second points at one past closing dq of name. | |
554 | * find the second name. | |
555 | */ | |
556 | while ((second < line + llen) && isspace(*second)) | |
557 | second++; | |
558 | ||
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; | |
570 | } | |
571 | /* They must match, otherwise ignore */ | |
572 | if (strcmp(cp+1, first)) | |
573 | goto free_both_and_fail; | |
574 | free(sp); | |
575 | return first; | |
576 | } | |
577 | ||
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; | |
5041aa70 LT |
587 | } |
588 | ||
22943f1a JH |
589 | /* unquoted first name */ |
590 | name = stop_at_slash(line, llen); | |
591 | if (!name || name == line) | |
5041aa70 LT |
592 | return NULL; |
593 | ||
22943f1a JH |
594 | name++; |
595 | ||
596 | /* since the first name is unquoted, a dq if exists must be | |
597 | * the beginning of the second name. | |
598 | */ | |
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); | |
604 | ||
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; | |
612 | } | |
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; | |
621 | } | |
622 | goto free_second_and_fail; | |
623 | } | |
624 | } | |
625 | ||
5041aa70 LT |
626 | /* |
627 | * Accept a name only if it shows up twice, exactly the same | |
628 | * form. | |
629 | */ | |
630 | for (len = 0 ; ; len++) { | |
631 | char c = name[len]; | |
632 | ||
633 | switch (c) { | |
634 | default: | |
635 | continue; | |
636 | case '\n': | |
e70a165d | 637 | return NULL; |
5041aa70 LT |
638 | case '\t': case ' ': |
639 | second = name+len; | |
640 | for (;;) { | |
641 | char c = *second++; | |
642 | if (c == '\n') | |
643 | return NULL; | |
644 | if (c == '/') | |
645 | break; | |
646 | } | |
0e87e048 | 647 | if (second[len] == '\n' && !memcmp(name, second, len)) { |
5041aa70 LT |
648 | char *ret = xmalloc(len + 1); |
649 | memcpy(ret, name, len); | |
650 | ret[len] = 0; | |
651 | return ret; | |
652 | } | |
653 | } | |
654 | } | |
655 | return NULL; | |
656 | } | |
657 | ||
c1bb9350 | 658 | /* Verify that we recognize the lines following a git header */ |
19c58fb8 | 659 | static int parse_git_header(char *line, int len, unsigned int size, struct patch *patch) |
c1bb9350 | 660 | { |
a4acb0eb LT |
661 | unsigned long offset; |
662 | ||
663 | /* A git diff has explicit new/delete information, so we don't guess */ | |
19c58fb8 LT |
664 | patch->is_new = 0; |
665 | patch->is_delete = 0; | |
a4acb0eb | 666 | |
5041aa70 LT |
667 | /* |
668 | * Some things may not have the old name in the | |
669 | * rest of the headers anywhere (pure mode changes, | |
670 | * or removing or adding empty files), so we get | |
671 | * the default name from the header. | |
672 | */ | |
22943f1a | 673 | patch->def_name = git_header_name(line, len); |
5041aa70 | 674 | |
a4acb0eb LT |
675 | line += len; |
676 | size -= len; | |
677 | linenr++; | |
678 | for (offset = len ; size > 0 ; offset += len, size -= len, line += len, linenr++) { | |
679 | static const struct opentry { | |
680 | const char *str; | |
19c58fb8 | 681 | int (*fn)(const char *, struct patch *); |
a4acb0eb LT |
682 | } optable[] = { |
683 | { "@@ -", gitdiff_hdrend }, | |
684 | { "--- ", gitdiff_oldname }, | |
685 | { "+++ ", gitdiff_newname }, | |
686 | { "old mode ", gitdiff_oldmode }, | |
687 | { "new mode ", gitdiff_newmode }, | |
688 | { "deleted file mode ", gitdiff_delete }, | |
689 | { "new file mode ", gitdiff_newfile }, | |
690 | { "copy from ", gitdiff_copysrc }, | |
691 | { "copy to ", gitdiff_copydst }, | |
33f4d087 LT |
692 | { "rename old ", gitdiff_renamesrc }, |
693 | { "rename new ", gitdiff_renamedst }, | |
dc938417 LT |
694 | { "rename from ", gitdiff_renamesrc }, |
695 | { "rename to ", gitdiff_renamedst }, | |
a4acb0eb | 696 | { "similarity index ", gitdiff_similarity }, |
70aadac0 | 697 | { "dissimilarity index ", gitdiff_dissimilarity }, |
2cf67f1e | 698 | { "index ", gitdiff_index }, |
9a4a100e | 699 | { "", gitdiff_unrecognized }, |
a4acb0eb LT |
700 | }; |
701 | int i; | |
c1bb9350 | 702 | |
c1bb9350 | 703 | len = linelen(line, size); |
a4acb0eb | 704 | if (!len || line[len-1] != '\n') |
c1bb9350 | 705 | break; |
b4f2a6ac | 706 | for (i = 0; i < ARRAY_SIZE(optable); i++) { |
a4acb0eb LT |
707 | const struct opentry *p = optable + i; |
708 | int oplen = strlen(p->str); | |
709 | if (len < oplen || memcmp(p->str, line, oplen)) | |
710 | continue; | |
19c58fb8 | 711 | if (p->fn(line + oplen, patch) < 0) |
a4acb0eb | 712 | return offset; |
9a4a100e | 713 | break; |
a4acb0eb | 714 | } |
c1bb9350 LT |
715 | } |
716 | ||
a4acb0eb | 717 | return offset; |
c1bb9350 LT |
718 | } |
719 | ||
fab2c257 | 720 | static int parse_num(const char *line, unsigned long *p) |
46979f56 LT |
721 | { |
722 | char *ptr; | |
fab2c257 LT |
723 | |
724 | if (!isdigit(*line)) | |
725 | return 0; | |
726 | *p = strtoul(line, &ptr, 10); | |
727 | return ptr - line; | |
728 | } | |
729 | ||
730 | static int parse_range(const char *line, int len, int offset, const char *expect, | |
731 | unsigned long *p1, unsigned long *p2) | |
732 | { | |
46979f56 LT |
733 | int digits, ex; |
734 | ||
735 | if (offset < 0 || offset >= len) | |
736 | return -1; | |
737 | line += offset; | |
738 | len -= offset; | |
739 | ||
fab2c257 LT |
740 | digits = parse_num(line, p1); |
741 | if (!digits) | |
46979f56 | 742 | return -1; |
46979f56 LT |
743 | |
744 | offset += digits; | |
745 | line += digits; | |
746 | len -= digits; | |
747 | ||
c1504628 | 748 | *p2 = 1; |
fab2c257 LT |
749 | if (*line == ',') { |
750 | digits = parse_num(line+1, p2); | |
751 | if (!digits) | |
752 | return -1; | |
753 | ||
754 | offset += digits+1; | |
755 | line += digits+1; | |
756 | len -= digits+1; | |
757 | } | |
758 | ||
46979f56 LT |
759 | ex = strlen(expect); |
760 | if (ex > len) | |
761 | return -1; | |
762 | if (memcmp(line, expect, ex)) | |
763 | return -1; | |
764 | ||
765 | return offset + ex; | |
766 | } | |
767 | ||
768 | /* | |
769 | * Parse a unified diff fragment header of the | |
770 | * form "@@ -a,b +c,d @@" | |
771 | */ | |
19c58fb8 | 772 | static int parse_fragment_header(char *line, int len, struct fragment *fragment) |
46979f56 LT |
773 | { |
774 | int offset; | |
775 | ||
776 | if (!len || line[len-1] != '\n') | |
777 | return -1; | |
778 | ||
779 | /* Figure out the number of lines in a fragment */ | |
fab2c257 LT |
780 | offset = parse_range(line, len, 4, " +", &fragment->oldpos, &fragment->oldlines); |
781 | offset = parse_range(line, len, offset, " @@", &fragment->newpos, &fragment->newlines); | |
46979f56 LT |
782 | |
783 | return offset; | |
784 | } | |
785 | ||
19c58fb8 | 786 | static int find_header(char *line, unsigned long size, int *hdrsize, struct patch *patch) |
c1bb9350 LT |
787 | { |
788 | unsigned long offset, len; | |
789 | ||
19c58fb8 LT |
790 | patch->is_rename = patch->is_copy = 0; |
791 | patch->is_new = patch->is_delete = -1; | |
792 | patch->old_mode = patch->new_mode = 0; | |
793 | patch->old_name = patch->new_name = NULL; | |
46979f56 | 794 | for (offset = 0; size > 0; offset += len, size -= len, line += len, linenr++) { |
c1bb9350 LT |
795 | unsigned long nextlen; |
796 | ||
797 | len = linelen(line, size); | |
798 | if (!len) | |
799 | break; | |
800 | ||
801 | /* Testing this early allows us to take a few shortcuts.. */ | |
802 | if (len < 6) | |
803 | continue; | |
46979f56 LT |
804 | |
805 | /* | |
82e5a82f | 806 | * Make sure we don't find any unconnected patch fragments. |
46979f56 LT |
807 | * That's a sign that we didn't find a header, and that a |
808 | * patch has become corrupted/broken up. | |
809 | */ | |
810 | if (!memcmp("@@ -", line, 4)) { | |
19c58fb8 LT |
811 | struct fragment dummy; |
812 | if (parse_fragment_header(line, len, &dummy) < 0) | |
46979f56 | 813 | continue; |
4ec99bf0 | 814 | error("patch fragment without header at line %d: %.*s", linenr, (int)len-1, line); |
46979f56 LT |
815 | } |
816 | ||
c1bb9350 LT |
817 | if (size < len + 6) |
818 | break; | |
819 | ||
820 | /* | |
821 | * Git patch? It might not have a real patch, just a rename | |
822 | * or mode change, so we handle that specially | |
823 | */ | |
824 | if (!memcmp("diff --git ", line, 11)) { | |
19c58fb8 | 825 | int git_hdr_len = parse_git_header(line, len, size, patch); |
206de27e | 826 | if (git_hdr_len <= len) |
c1bb9350 | 827 | continue; |
b7e8039a LT |
828 | if (!patch->old_name && !patch->new_name) { |
829 | if (!patch->def_name) | |
830 | die("git diff header lacks filename information (line %d)", linenr); | |
831 | patch->old_name = patch->new_name = patch->def_name; | |
832 | } | |
a4acb0eb | 833 | *hdrsize = git_hdr_len; |
c1bb9350 LT |
834 | return offset; |
835 | } | |
836 | ||
837 | /** --- followed by +++ ? */ | |
838 | if (memcmp("--- ", line, 4) || memcmp("+++ ", line + len, 4)) | |
839 | continue; | |
840 | ||
841 | /* | |
842 | * We only accept unified patches, so we want it to | |
843 | * at least have "@@ -a,b +c,d @@\n", which is 14 chars | |
844 | * minimum | |
845 | */ | |
846 | nextlen = linelen(line + len, size - len); | |
847 | if (size < nextlen + 14 || memcmp("@@ -", line + len + nextlen, 4)) | |
848 | continue; | |
849 | ||
850 | /* Ok, we'll consider it a patch */ | |
19c58fb8 | 851 | parse_traditional_patch(line, line+len, patch); |
c1bb9350 | 852 | *hdrsize = len + nextlen; |
46979f56 | 853 | linenr += 2; |
c1bb9350 LT |
854 | return offset; |
855 | } | |
856 | return -1; | |
857 | } | |
858 | ||
c1bb9350 LT |
859 | /* |
860 | * Parse a unified diff. Note that this really needs | |
861 | * to parse each fragment separately, since the only | |
862 | * way to know the difference between a "---" that is | |
863 | * part of a patch, and a "---" that starts the next | |
864 | * patch is to look at the line counts.. | |
865 | */ | |
19c58fb8 | 866 | static int parse_fragment(char *line, unsigned long size, struct patch *patch, struct fragment *fragment) |
c1bb9350 | 867 | { |
3f40315a | 868 | int added, deleted; |
c1bb9350 | 869 | int len = linelen(line, size), offset; |
30996652 | 870 | unsigned long oldlines, newlines; |
47495887 | 871 | unsigned long leading, trailing; |
c1bb9350 | 872 | |
19c58fb8 | 873 | offset = parse_fragment_header(line, len, fragment); |
c1bb9350 LT |
874 | if (offset < 0) |
875 | return -1; | |
19c58fb8 LT |
876 | oldlines = fragment->oldlines; |
877 | newlines = fragment->newlines; | |
47495887 EB |
878 | leading = 0; |
879 | trailing = 0; | |
c1bb9350 | 880 | |
30996652 LT |
881 | if (patch->is_new < 0) { |
882 | patch->is_new = !oldlines; | |
883 | if (!oldlines) | |
884 | patch->old_name = NULL; | |
885 | } | |
886 | if (patch->is_delete < 0) { | |
887 | patch->is_delete = !newlines; | |
888 | if (!newlines) | |
889 | patch->new_name = NULL; | |
890 | } | |
891 | ||
3103cf9e | 892 | if (patch->is_new && oldlines) |
30996652 | 893 | return error("new file depends on old contents"); |
af3f929f LT |
894 | if (patch->is_delete != !newlines) { |
895 | if (newlines) | |
896 | return error("deleted file still has contents"); | |
897 | fprintf(stderr, "** warning: file %s becomes empty but is not deleted\n", patch->new_name); | |
898 | } | |
a4acb0eb | 899 | |
c1bb9350 LT |
900 | /* Parse the thing.. */ |
901 | line += len; | |
902 | size -= len; | |
46979f56 | 903 | linenr++; |
3f40315a | 904 | added = deleted = 0; |
46979f56 | 905 | for (offset = len; size > 0; offset += len, size -= len, line += len, linenr++) { |
c1bb9350 LT |
906 | if (!oldlines && !newlines) |
907 | break; | |
908 | len = linelen(line, size); | |
909 | if (!len || line[len-1] != '\n') | |
910 | return -1; | |
911 | switch (*line) { | |
912 | default: | |
913 | return -1; | |
914 | case ' ': | |
915 | oldlines--; | |
916 | newlines--; | |
47495887 EB |
917 | if (!deleted && !added) |
918 | leading++; | |
919 | trailing++; | |
c1bb9350 LT |
920 | break; |
921 | case '-': | |
3f40315a | 922 | deleted++; |
c1bb9350 | 923 | oldlines--; |
47495887 | 924 | trailing = 0; |
c1bb9350 LT |
925 | break; |
926 | case '+': | |
19bfcd5a LT |
927 | /* |
928 | * We know len is at least two, since we have a '+' and | |
b5767dd6 JH |
929 | * we checked that the last character was a '\n' above. |
930 | * That is, an addition of an empty line would check | |
931 | * the '+' here. Sneaky... | |
19bfcd5a | 932 | */ |
2ae1c53b | 933 | if ((new_whitespace != nowarn_whitespace) && |
b5767dd6 | 934 | isspace(line[len-2])) { |
fc96b7c9 JH |
935 | whitespace_error++; |
936 | if (squelch_whitespace_errors && | |
937 | squelch_whitespace_errors < | |
938 | whitespace_error) | |
939 | ; | |
940 | else { | |
941 | fprintf(stderr, "Adds trailing whitespace.\n%s:%d:%.*s\n", | |
942 | patch_input_file, | |
943 | linenr, len-2, line+1); | |
944 | } | |
19bfcd5a | 945 | } |
3f40315a | 946 | added++; |
c1bb9350 | 947 | newlines--; |
47495887 | 948 | trailing = 0; |
c1bb9350 | 949 | break; |
433ef8a2 FK |
950 | |
951 | /* We allow "\ No newline at end of file". Depending | |
952 | * on locale settings when the patch was produced we | |
953 | * don't know what this line looks like. The only | |
56d33b11 JH |
954 | * thing we do know is that it begins with "\ ". |
955 | * Checking for 12 is just for sanity check -- any | |
956 | * l10n of "\ No newline..." is at least that long. | |
957 | */ | |
fab2c257 | 958 | case '\\': |
433ef8a2 | 959 | if (len < 12 || memcmp(line, "\\ ", 2)) |
3cca928d | 960 | return -1; |
fab2c257 | 961 | break; |
c1bb9350 LT |
962 | } |
963 | } | |
c1504628 LT |
964 | if (oldlines || newlines) |
965 | return -1; | |
47495887 EB |
966 | fragment->leading = leading; |
967 | fragment->trailing = trailing; | |
968 | ||
8b64647d JH |
969 | /* If a fragment ends with an incomplete line, we failed to include |
970 | * it in the above loop because we hit oldlines == newlines == 0 | |
971 | * before seeing it. | |
972 | */ | |
433ef8a2 | 973 | if (12 < size && !memcmp(line, "\\ ", 2)) |
8b64647d JH |
974 | offset += linelen(line, size); |
975 | ||
3f40315a LT |
976 | patch->lines_added += added; |
977 | patch->lines_deleted += deleted; | |
c1bb9350 LT |
978 | return offset; |
979 | } | |
980 | ||
19c58fb8 | 981 | static int parse_single_patch(char *line, unsigned long size, struct patch *patch) |
c1bb9350 LT |
982 | { |
983 | unsigned long offset = 0; | |
19c58fb8 | 984 | struct fragment **fragp = &patch->fragments; |
c1bb9350 LT |
985 | |
986 | while (size > 4 && !memcmp(line, "@@ -", 4)) { | |
19c58fb8 LT |
987 | struct fragment *fragment; |
988 | int len; | |
989 | ||
90321c10 | 990 | fragment = xcalloc(1, sizeof(*fragment)); |
19c58fb8 | 991 | len = parse_fragment(line, size, patch, fragment); |
c1bb9350 | 992 | if (len <= 0) |
46979f56 | 993 | die("corrupt patch at line %d", linenr); |
c1bb9350 | 994 | |
19c58fb8 LT |
995 | fragment->patch = line; |
996 | fragment->size = len; | |
997 | ||
998 | *fragp = fragment; | |
999 | fragp = &fragment->next; | |
c1bb9350 LT |
1000 | |
1001 | offset += len; | |
1002 | line += len; | |
1003 | size -= len; | |
1004 | } | |
1005 | return offset; | |
1006 | } | |
1007 | ||
1fea629f LT |
1008 | static inline int metadata_changes(struct patch *patch) |
1009 | { | |
1010 | return patch->is_rename > 0 || | |
1011 | patch->is_copy > 0 || | |
1012 | patch->is_new > 0 || | |
1013 | patch->is_delete || | |
1014 | (patch->old_mode && patch->new_mode && | |
1015 | patch->old_mode != patch->new_mode); | |
1016 | } | |
1017 | ||
3cd4f5e8 JH |
1018 | static char *inflate_it(const void *data, unsigned long size, |
1019 | unsigned long inflated_size) | |
051308f6 | 1020 | { |
3cd4f5e8 JH |
1021 | z_stream stream; |
1022 | void *out; | |
1023 | int st; | |
1024 | ||
1025 | memset(&stream, 0, sizeof(stream)); | |
1026 | ||
1027 | stream.next_in = (unsigned char *)data; | |
1028 | stream.avail_in = size; | |
1029 | stream.next_out = out = xmalloc(inflated_size); | |
1030 | stream.avail_out = inflated_size; | |
1031 | inflateInit(&stream); | |
1032 | st = inflate(&stream, Z_FINISH); | |
1033 | if ((st != Z_STREAM_END) || stream.total_out != inflated_size) { | |
1034 | free(out); | |
1035 | return NULL; | |
1036 | } | |
1037 | return out; | |
1038 | } | |
1039 | ||
1040 | static struct fragment *parse_binary_hunk(char **buf_p, | |
1041 | unsigned long *sz_p, | |
1042 | int *status_p, | |
1043 | int *used_p) | |
1044 | { | |
1045 | /* Expect a line that begins with binary patch method ("literal" | |
1046 | * or "delta"), followed by the length of data before deflating. | |
1047 | * a sequence of 'length-byte' followed by base-85 encoded data | |
1048 | * should follow, terminated by a newline. | |
051308f6 JH |
1049 | * |
1050 | * Each 5-byte sequence of base-85 encodes up to 4 bytes, | |
1051 | * and we would limit the patch line to 66 characters, | |
1052 | * so one line can fit up to 13 groups that would decode | |
1053 | * to 52 bytes max. The length byte 'A'-'Z' corresponds | |
1054 | * to 1-26 bytes, and 'a'-'z' corresponds to 27-52 bytes. | |
051308f6 JH |
1055 | */ |
1056 | int llen, used; | |
3cd4f5e8 JH |
1057 | unsigned long size = *sz_p; |
1058 | char *buffer = *buf_p; | |
1059 | int patch_method; | |
1060 | unsigned long origlen; | |
0660626c | 1061 | char *data = NULL; |
3cd4f5e8 JH |
1062 | int hunk_size = 0; |
1063 | struct fragment *frag; | |
051308f6 | 1064 | |
0660626c JH |
1065 | llen = linelen(buffer, size); |
1066 | used = llen; | |
3cd4f5e8 JH |
1067 | |
1068 | *status_p = 0; | |
0660626c JH |
1069 | |
1070 | if (!strncmp(buffer, "delta ", 6)) { | |
3cd4f5e8 JH |
1071 | patch_method = BINARY_DELTA_DEFLATED; |
1072 | origlen = strtoul(buffer + 6, NULL, 10); | |
0660626c JH |
1073 | } |
1074 | else if (!strncmp(buffer, "literal ", 8)) { | |
3cd4f5e8 JH |
1075 | patch_method = BINARY_LITERAL_DEFLATED; |
1076 | origlen = strtoul(buffer + 8, NULL, 10); | |
0660626c JH |
1077 | } |
1078 | else | |
3cd4f5e8 JH |
1079 | return NULL; |
1080 | ||
1081 | linenr++; | |
0660626c | 1082 | buffer += llen; |
051308f6 JH |
1083 | while (1) { |
1084 | int byte_length, max_byte_length, newsize; | |
1085 | llen = linelen(buffer, size); | |
1086 | used += llen; | |
1087 | linenr++; | |
03eb8f8a JH |
1088 | if (llen == 1) { |
1089 | /* consume the blank line */ | |
1090 | buffer++; | |
1091 | size--; | |
051308f6 | 1092 | break; |
03eb8f8a | 1093 | } |
051308f6 JH |
1094 | /* Minimum line is "A00000\n" which is 7-byte long, |
1095 | * and the line length must be multiple of 5 plus 2. | |
1096 | */ | |
1097 | if ((llen < 7) || (llen-2) % 5) | |
1098 | goto corrupt; | |
1099 | max_byte_length = (llen - 2) / 5 * 4; | |
1100 | byte_length = *buffer; | |
1101 | if ('A' <= byte_length && byte_length <= 'Z') | |
1102 | byte_length = byte_length - 'A' + 1; | |
1103 | else if ('a' <= byte_length && byte_length <= 'z') | |
1104 | byte_length = byte_length - 'a' + 27; | |
1105 | else | |
1106 | goto corrupt; | |
1107 | /* if the input length was not multiple of 4, we would | |
1108 | * have filler at the end but the filler should never | |
1109 | * exceed 3 bytes | |
1110 | */ | |
1111 | if (max_byte_length < byte_length || | |
1112 | byte_length <= max_byte_length - 4) | |
1113 | goto corrupt; | |
3cd4f5e8 | 1114 | newsize = hunk_size + byte_length; |
0660626c | 1115 | data = xrealloc(data, newsize); |
3cd4f5e8 | 1116 | if (decode_85(data + hunk_size, buffer + 1, byte_length)) |
051308f6 | 1117 | goto corrupt; |
3cd4f5e8 | 1118 | hunk_size = newsize; |
051308f6 JH |
1119 | buffer += llen; |
1120 | size -= llen; | |
1121 | } | |
3cd4f5e8 JH |
1122 | |
1123 | frag = xcalloc(1, sizeof(*frag)); | |
1124 | frag->patch = inflate_it(data, hunk_size, origlen); | |
1125 | if (!frag->patch) | |
1126 | goto corrupt; | |
1127 | free(data); | |
1128 | frag->size = origlen; | |
1129 | *buf_p = buffer; | |
1130 | *sz_p = size; | |
1131 | *used_p = used; | |
1132 | frag->binary_patch_method = patch_method; | |
1133 | return frag; | |
1134 | ||
051308f6 | 1135 | corrupt: |
3cd4f5e8 JH |
1136 | if (data) |
1137 | free(data); | |
1138 | *status_p = -1; | |
1139 | error("corrupt binary patch at line %d: %.*s", | |
1140 | linenr-1, llen-1, buffer); | |
1141 | return NULL; | |
1142 | } | |
1143 | ||
1144 | static int parse_binary(char *buffer, unsigned long size, struct patch *patch) | |
1145 | { | |
1146 | /* We have read "GIT binary patch\n"; what follows is a line | |
1147 | * that says the patch method (currently, either "literal" or | |
1148 | * "delta") and the length of data before deflating; a | |
1149 | * sequence of 'length-byte' followed by base-85 encoded data | |
1150 | * follows. | |
1151 | * | |
1152 | * When a binary patch is reversible, there is another binary | |
1153 | * hunk in the same format, starting with patch method (either | |
1154 | * "literal" or "delta") with the length of data, and a sequence | |
1155 | * of length-byte + base-85 encoded data, terminated with another | |
1156 | * empty line. This data, when applied to the postimage, produces | |
1157 | * the preimage. | |
1158 | */ | |
1159 | struct fragment *forward; | |
1160 | struct fragment *reverse; | |
1161 | int status; | |
1162 | int used, used_1; | |
1163 | ||
1164 | forward = parse_binary_hunk(&buffer, &size, &status, &used); | |
1165 | if (!forward && !status) | |
1166 | /* there has to be one hunk (forward hunk) */ | |
1167 | return error("unrecognized binary patch at line %d", linenr-1); | |
1168 | if (status) | |
1169 | /* otherwise we already gave an error message */ | |
1170 | return status; | |
1171 | ||
1172 | reverse = parse_binary_hunk(&buffer, &size, &status, &used_1); | |
1173 | if (reverse) | |
1174 | used += used_1; | |
1175 | else if (status) { | |
1176 | /* not having reverse hunk is not an error, but having | |
1177 | * a corrupt reverse hunk is. | |
1178 | */ | |
1179 | free((void*) forward->patch); | |
1180 | free(forward); | |
1181 | return status; | |
1182 | } | |
1183 | forward->next = reverse; | |
1184 | patch->fragments = forward; | |
1185 | patch->is_binary = 1; | |
1186 | return used; | |
051308f6 JH |
1187 | } |
1188 | ||
19c58fb8 | 1189 | static int parse_chunk(char *buffer, unsigned long size, struct patch *patch) |
c1bb9350 LT |
1190 | { |
1191 | int hdrsize, patchsize; | |
19c58fb8 | 1192 | int offset = find_header(buffer, size, &hdrsize, patch); |
c1bb9350 LT |
1193 | |
1194 | if (offset < 0) | |
1195 | return offset; | |
c1bb9350 | 1196 | |
19c58fb8 | 1197 | patchsize = parse_single_patch(buffer + offset + hdrsize, size - offset - hdrsize, patch); |
c1bb9350 | 1198 | |
92927ed0 | 1199 | if (!patchsize) { |
3200d1ae JH |
1200 | static const char *binhdr[] = { |
1201 | "Binary files ", | |
1202 | "Files ", | |
1203 | NULL, | |
1204 | }; | |
051308f6 | 1205 | static const char git_binary[] = "GIT binary patch\n"; |
3200d1ae JH |
1206 | int i; |
1207 | int hd = hdrsize + offset; | |
1208 | unsigned long llen = linelen(buffer + hd, size - hd); | |
1209 | ||
051308f6 JH |
1210 | if (llen == sizeof(git_binary) - 1 && |
1211 | !memcmp(git_binary, buffer + hd, llen)) { | |
1212 | int used; | |
1213 | linenr++; | |
1214 | used = parse_binary(buffer + hd + llen, | |
1215 | size - hd - llen, patch); | |
1216 | if (used) | |
1217 | patchsize = used + llen; | |
1218 | else | |
1219 | patchsize = 0; | |
1220 | } | |
1221 | else if (!memcmp(" differ\n", buffer + hd + llen - 8, 8)) { | |
3200d1ae JH |
1222 | for (i = 0; binhdr[i]; i++) { |
1223 | int len = strlen(binhdr[i]); | |
1224 | if (len < size - hd && | |
1225 | !memcmp(binhdr[i], buffer + hd, len)) { | |
051308f6 | 1226 | linenr++; |
3200d1ae | 1227 | patch->is_binary = 1; |
051308f6 | 1228 | patchsize = llen; |
3200d1ae JH |
1229 | break; |
1230 | } | |
1231 | } | |
051308f6 | 1232 | } |
ff36de08 | 1233 | |
92927ed0 | 1234 | /* Empty patch cannot be applied if: |
011f4274 JH |
1235 | * - it is a binary patch and we do not do binary_replace, or |
1236 | * - text patch without metadata change | |
92927ed0 JH |
1237 | */ |
1238 | if ((apply || check) && | |
011f4274 JH |
1239 | (patch->is_binary |
1240 | ? !allow_binary_replacement | |
1241 | : !metadata_changes(patch))) | |
ff36de08 JH |
1242 | die("patch with only garbage at line %d", linenr); |
1243 | } | |
1fea629f | 1244 | |
c1bb9350 LT |
1245 | return offset + hdrsize + patchsize; |
1246 | } | |
1247 | ||
e5a94313 JS |
1248 | #define swap(a,b) myswap((a),(b),sizeof(a)) |
1249 | ||
1250 | #define myswap(a, b, size) do { \ | |
1251 | unsigned char mytmp[size]; \ | |
1252 | memcpy(mytmp, &a, size); \ | |
1253 | memcpy(&a, &b, size); \ | |
1254 | memcpy(&b, mytmp, size); \ | |
1255 | } while (0) | |
1256 | ||
1257 | static void reverse_patches(struct patch *p) | |
1258 | { | |
1259 | for (; p; p = p->next) { | |
1260 | struct fragment *frag = p->fragments; | |
1261 | ||
1262 | swap(p->new_name, p->old_name); | |
1263 | swap(p->new_mode, p->old_mode); | |
1264 | swap(p->is_new, p->is_delete); | |
1265 | swap(p->lines_added, p->lines_deleted); | |
1266 | swap(p->old_sha1_prefix, p->new_sha1_prefix); | |
1267 | ||
1268 | for (; frag; frag = frag->next) { | |
1269 | swap(frag->newpos, frag->oldpos); | |
1270 | swap(frag->newlines, frag->oldlines); | |
1271 | } | |
e5a94313 JS |
1272 | } |
1273 | } | |
1274 | ||
6da4016a LT |
1275 | static const char pluses[] = "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"; |
1276 | static const char minuses[]= "----------------------------------------------------------------------"; | |
3f40315a LT |
1277 | |
1278 | static void show_stats(struct patch *patch) | |
1279 | { | |
62917097 | 1280 | const char *prefix = ""; |
03b4538b | 1281 | char *name = patch->new_name; |
22943f1a | 1282 | char *qname = NULL; |
95bedc9e | 1283 | int len, max, add, del, total; |
3f40315a | 1284 | |
5041aa70 | 1285 | if (!name) |
03b4538b | 1286 | name = patch->old_name; |
3f40315a | 1287 | |
22943f1a JH |
1288 | if (0 < (len = quote_c_style(name, NULL, NULL, 0))) { |
1289 | qname = xmalloc(len + 1); | |
1290 | quote_c_style(name, qname, NULL, 0); | |
1291 | name = qname; | |
1292 | } | |
1293 | ||
3f40315a LT |
1294 | /* |
1295 | * "scale" the filename | |
1296 | */ | |
1297 | len = strlen(name); | |
1298 | max = max_len; | |
1299 | if (max > 50) | |
1300 | max = 50; | |
62917097 LT |
1301 | if (len > max) { |
1302 | char *slash; | |
1303 | prefix = "..."; | |
1304 | max -= 3; | |
3f40315a | 1305 | name += len - max; |
62917097 LT |
1306 | slash = strchr(name, '/'); |
1307 | if (slash) | |
1308 | name = slash; | |
1309 | } | |
3f40315a LT |
1310 | len = max; |
1311 | ||
1312 | /* | |
1313 | * scale the add/delete | |
1314 | */ | |
1315 | max = max_change; | |
1316 | if (max + len > 70) | |
1317 | max = 70 - len; | |
95bedc9e LT |
1318 | |
1319 | add = patch->lines_added; | |
1320 | del = patch->lines_deleted; | |
1321 | total = add + del; | |
1322 | ||
69f956e1 SV |
1323 | if (max_change > 0) { |
1324 | total = (total * max + max_change / 2) / max_change; | |
1325 | add = (add * max + max_change / 2) / max_change; | |
1326 | del = total - add; | |
1327 | } | |
ff36de08 JH |
1328 | if (patch->is_binary) |
1329 | printf(" %s%-*s | Bin\n", prefix, len, name); | |
1330 | else | |
1331 | printf(" %s%-*s |%5d %.*s%.*s\n", prefix, | |
1332 | len, name, patch->lines_added + patch->lines_deleted, | |
1333 | add, pluses, del, minuses); | |
22943f1a JH |
1334 | if (qname) |
1335 | free(qname); | |
3f40315a LT |
1336 | } |
1337 | ||
3cca928d LT |
1338 | static int read_old_data(struct stat *st, const char *path, void *buf, unsigned long size) |
1339 | { | |
1340 | int fd; | |
1341 | unsigned long got; | |
1342 | ||
1343 | switch (st->st_mode & S_IFMT) { | |
1344 | case S_IFLNK: | |
1345 | return readlink(path, buf, size); | |
1346 | case S_IFREG: | |
1347 | fd = open(path, O_RDONLY); | |
1348 | if (fd < 0) | |
1349 | return error("unable to open %s", path); | |
1350 | got = 0; | |
1351 | for (;;) { | |
1d7f171c | 1352 | int ret = xread(fd, (char *) buf + got, size - got); |
1c15afb9 | 1353 | if (ret <= 0) |
3cca928d LT |
1354 | break; |
1355 | got += ret; | |
1356 | } | |
1357 | close(fd); | |
1358 | return got; | |
1359 | ||
1360 | default: | |
1361 | return -1; | |
1362 | } | |
1363 | } | |
1364 | ||
47495887 | 1365 | static int find_offset(const char *buf, unsigned long size, const char *fragment, unsigned long fragsize, int line, int *lines) |
3cca928d | 1366 | { |
6e7c92a9 LT |
1367 | int i; |
1368 | unsigned long start, backwards, forwards; | |
3cca928d LT |
1369 | |
1370 | if (fragsize > size) | |
1371 | return -1; | |
1372 | ||
1373 | start = 0; | |
1374 | if (line > 1) { | |
3cca928d | 1375 | unsigned long offset = 0; |
6e7c92a9 LT |
1376 | i = line-1; |
1377 | while (offset + fragsize <= size) { | |
3cca928d LT |
1378 | if (buf[offset++] == '\n') { |
1379 | start = offset; | |
6e7c92a9 | 1380 | if (!--i) |
3cca928d LT |
1381 | break; |
1382 | } | |
1383 | } | |
1384 | } | |
1385 | ||
1386 | /* Exact line number? */ | |
1387 | if (!memcmp(buf + start, fragment, fragsize)) | |
1388 | return start; | |
1389 | ||
6e7c92a9 LT |
1390 | /* |
1391 | * There's probably some smart way to do this, but I'll leave | |
1392 | * that to the smart and beautiful people. I'm simple and stupid. | |
1393 | */ | |
1394 | backwards = start; | |
1395 | forwards = start; | |
1396 | for (i = 0; ; i++) { | |
1397 | unsigned long try; | |
1398 | int n; | |
1399 | ||
1400 | /* "backward" */ | |
1401 | if (i & 1) { | |
1402 | if (!backwards) { | |
1403 | if (forwards + fragsize > size) | |
1404 | break; | |
1405 | continue; | |
1406 | } | |
1407 | do { | |
1408 | --backwards; | |
1409 | } while (backwards && buf[backwards-1] != '\n'); | |
1410 | try = backwards; | |
1411 | } else { | |
1412 | while (forwards + fragsize <= size) { | |
1413 | if (buf[forwards++] == '\n') | |
1414 | break; | |
1415 | } | |
1416 | try = forwards; | |
1417 | } | |
1418 | ||
1419 | if (try + fragsize > size) | |
1420 | continue; | |
1421 | if (memcmp(buf + try, fragment, fragsize)) | |
1422 | continue; | |
1423 | n = (i >> 1)+1; | |
1424 | if (i & 1) | |
1425 | n = -n; | |
47495887 | 1426 | *lines = n; |
6e7c92a9 LT |
1427 | return try; |
1428 | } | |
1429 | ||
3cca928d LT |
1430 | /* |
1431 | * We should start searching forward and backward. | |
1432 | */ | |
1433 | return -1; | |
1434 | } | |
1435 | ||
47495887 EB |
1436 | static void remove_first_line(const char **rbuf, int *rsize) |
1437 | { | |
1438 | const char *buf = *rbuf; | |
1439 | int size = *rsize; | |
1440 | unsigned long offset; | |
1441 | offset = 0; | |
1442 | while (offset <= size) { | |
1443 | if (buf[offset++] == '\n') | |
1444 | break; | |
1445 | } | |
1446 | *rsize = size - offset; | |
1447 | *rbuf = buf + offset; | |
1448 | } | |
1449 | ||
1450 | static void remove_last_line(const char **rbuf, int *rsize) | |
1451 | { | |
1452 | const char *buf = *rbuf; | |
1453 | int size = *rsize; | |
1454 | unsigned long offset; | |
1455 | offset = size - 1; | |
1456 | while (offset > 0) { | |
1457 | if (buf[--offset] == '\n') | |
1458 | break; | |
1459 | } | |
1460 | *rsize = offset + 1; | |
1461 | } | |
1462 | ||
6e7c92a9 LT |
1463 | struct buffer_desc { |
1464 | char *buffer; | |
1465 | unsigned long size; | |
1466 | unsigned long alloc; | |
1467 | }; | |
1468 | ||
b5767dd6 JH |
1469 | static int apply_line(char *output, const char *patch, int plen) |
1470 | { | |
1471 | /* plen is number of bytes to be copied from patch, | |
1472 | * starting at patch+1 (patch[0] is '+'). Typically | |
1473 | * patch[plen] is '\n'. | |
1474 | */ | |
1475 | int add_nl_to_tail = 0; | |
2ae1c53b | 1476 | if ((new_whitespace == strip_whitespace) && |
b5767dd6 JH |
1477 | 1 < plen && isspace(patch[plen-1])) { |
1478 | if (patch[plen] == '\n') | |
1479 | add_nl_to_tail = 1; | |
1480 | plen--; | |
1481 | while (0 < plen && isspace(patch[plen])) | |
1482 | plen--; | |
fc96b7c9 | 1483 | applied_after_stripping++; |
b5767dd6 JH |
1484 | } |
1485 | memcpy(output, patch + 1, plen); | |
1486 | if (add_nl_to_tail) | |
1487 | output[plen++] = '\n'; | |
1488 | return plen; | |
1489 | } | |
1490 | ||
f686d030 | 1491 | static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag, int inaccurate_eof) |
3cca928d | 1492 | { |
65aadb92 | 1493 | int match_beginning, match_end; |
6e7c92a9 | 1494 | char *buf = desc->buffer; |
3cca928d LT |
1495 | const char *patch = frag->patch; |
1496 | int offset, size = frag->size; | |
1497 | char *old = xmalloc(size); | |
1498 | char *new = xmalloc(size); | |
47495887 | 1499 | const char *oldlines, *newlines; |
3cca928d | 1500 | int oldsize = 0, newsize = 0; |
47495887 EB |
1501 | unsigned long leading, trailing; |
1502 | int pos, lines; | |
3cca928d LT |
1503 | |
1504 | while (size > 0) { | |
e5a94313 | 1505 | char first; |
3cca928d LT |
1506 | int len = linelen(patch, size); |
1507 | int plen; | |
1508 | ||
1509 | if (!len) | |
1510 | break; | |
1511 | ||
1512 | /* | |
1513 | * "plen" is how much of the line we should use for | |
1514 | * the actual patch data. Normally we just remove the | |
1515 | * first character on the line, but if the line is | |
1516 | * followed by "\ No newline", then we also remove the | |
1517 | * last one (which is the newline, of course). | |
1518 | */ | |
1519 | plen = len-1; | |
8b64647d | 1520 | if (len < size && patch[len] == '\\') |
3cca928d | 1521 | plen--; |
e5a94313 | 1522 | first = *patch; |
f686d030 | 1523 | if (apply_in_reverse) { |
e5a94313 JS |
1524 | if (first == '-') |
1525 | first = '+'; | |
1526 | else if (first == '+') | |
1527 | first = '-'; | |
1528 | } | |
1529 | switch (first) { | |
3cca928d LT |
1530 | case ' ': |
1531 | case '-': | |
1532 | memcpy(old + oldsize, patch + 1, plen); | |
1533 | oldsize += plen; | |
e5a94313 | 1534 | if (first == '-') |
3cca928d LT |
1535 | break; |
1536 | /* Fall-through for ' ' */ | |
1537 | case '+': | |
e5a94313 | 1538 | if (first != '+' || !no_add) |
b5767dd6 JH |
1539 | newsize += apply_line(new + newsize, patch, |
1540 | plen); | |
3cca928d LT |
1541 | break; |
1542 | case '@': case '\\': | |
1543 | /* Ignore it, we already handled it */ | |
1544 | break; | |
1545 | default: | |
1546 | return -1; | |
1547 | } | |
1548 | patch += len; | |
1549 | size -= len; | |
1550 | } | |
1551 | ||
3eaa38da | 1552 | if (inaccurate_eof && oldsize > 0 && old[oldsize - 1] == '\n' && |
5b5d4d9e JS |
1553 | newsize > 0 && new[newsize - 1] == '\n') { |
1554 | oldsize--; | |
1555 | newsize--; | |
1556 | } | |
47495887 EB |
1557 | |
1558 | oldlines = old; | |
1559 | newlines = new; | |
1560 | leading = frag->leading; | |
1561 | trailing = frag->trailing; | |
1bf1a859 LT |
1562 | |
1563 | /* | |
65aadb92 JH |
1564 | * If we don't have any leading/trailing data in the patch, |
1565 | * we want it to match at the beginning/end of the file. | |
1bf1a859 | 1566 | */ |
65aadb92 | 1567 | match_beginning = !leading && (frag->oldpos == 1); |
1bf1a859 LT |
1568 | match_end = !trailing; |
1569 | ||
47495887 EB |
1570 | lines = 0; |
1571 | pos = frag->newpos; | |
1572 | for (;;) { | |
57dc397c JH |
1573 | offset = find_offset(buf, desc->size, |
1574 | oldlines, oldsize, pos, &lines); | |
1bf1a859 LT |
1575 | if (match_end && offset + oldsize != desc->size) |
1576 | offset = -1; | |
65aadb92 JH |
1577 | if (match_beginning && offset) |
1578 | offset = -1; | |
47495887 EB |
1579 | if (offset >= 0) { |
1580 | int diff = newsize - oldsize; | |
1581 | unsigned long size = desc->size + diff; | |
1582 | unsigned long alloc = desc->alloc; | |
1583 | ||
1584 | /* Warn if it was necessary to reduce the number | |
1585 | * of context lines. | |
1586 | */ | |
57dc397c JH |
1587 | if ((leading != frag->leading) || |
1588 | (trailing != frag->trailing)) | |
1589 | fprintf(stderr, "Context reduced to (%ld/%ld)" | |
1590 | " to apply fragment at %d\n", | |
47495887 EB |
1591 | leading, trailing, pos + lines); |
1592 | ||
1593 | if (size > alloc) { | |
1594 | alloc = size + 8192; | |
1595 | desc->alloc = alloc; | |
1596 | buf = xrealloc(buf, alloc); | |
1597 | desc->buffer = buf; | |
1598 | } | |
1599 | desc->size = size; | |
57dc397c JH |
1600 | memmove(buf + offset + newsize, |
1601 | buf + offset + oldsize, | |
1602 | size - offset - newsize); | |
47495887 EB |
1603 | memcpy(buf + offset, newlines, newsize); |
1604 | offset = 0; | |
1605 | ||
1606 | break; | |
1607 | } | |
1608 | ||
1609 | /* Am I at my context limits? */ | |
1610 | if ((leading <= p_context) && (trailing <= p_context)) | |
1611 | break; | |
65aadb92 JH |
1612 | if (match_beginning || match_end) { |
1613 | match_beginning = match_end = 0; | |
1bf1a859 LT |
1614 | continue; |
1615 | } | |
47495887 EB |
1616 | /* Reduce the number of context lines |
1617 | * Reduce both leading and trailing if they are equal | |
1618 | * otherwise just reduce the larger context. | |
1619 | */ | |
1620 | if (leading >= trailing) { | |
1621 | remove_first_line(&oldlines, &oldsize); | |
1622 | remove_first_line(&newlines, &newsize); | |
1623 | pos--; | |
1624 | leading--; | |
1625 | } | |
1626 | if (trailing > leading) { | |
1627 | remove_last_line(&oldlines, &oldsize); | |
1628 | remove_last_line(&newlines, &newsize); | |
1629 | trailing--; | |
6e7c92a9 | 1630 | } |
3cca928d LT |
1631 | } |
1632 | ||
1633 | free(old); | |
1634 | free(new); | |
1635 | return offset; | |
1636 | } | |
1637 | ||
0660626c JH |
1638 | static int apply_binary_fragment(struct buffer_desc *desc, struct patch *patch) |
1639 | { | |
1640 | unsigned long dst_size; | |
1641 | struct fragment *fragment = patch->fragments; | |
1642 | void *data; | |
1643 | void *result; | |
1644 | ||
3cd4f5e8 JH |
1645 | /* Binary patch is irreversible without the optional second hunk */ |
1646 | if (apply_in_reverse) { | |
1647 | if (!fragment->next) | |
1648 | return error("cannot reverse-apply a binary patch " | |
1649 | "without the reverse hunk to '%s'", | |
1650 | patch->new_name | |
1651 | ? patch->new_name : patch->old_name); | |
03eb8f8a | 1652 | fragment = fragment->next; |
3cd4f5e8 JH |
1653 | } |
1654 | data = (void*) fragment->patch; | |
1655 | switch (fragment->binary_patch_method) { | |
0660626c JH |
1656 | case BINARY_DELTA_DEFLATED: |
1657 | result = patch_delta(desc->buffer, desc->size, | |
1658 | data, | |
3cd4f5e8 | 1659 | fragment->size, |
0660626c JH |
1660 | &dst_size); |
1661 | free(desc->buffer); | |
1662 | desc->buffer = result; | |
0660626c JH |
1663 | break; |
1664 | case BINARY_LITERAL_DEFLATED: | |
1665 | free(desc->buffer); | |
1666 | desc->buffer = data; | |
3cd4f5e8 | 1667 | dst_size = fragment->size; |
0660626c JH |
1668 | break; |
1669 | } | |
1670 | if (!desc->buffer) | |
1671 | return -1; | |
1672 | desc->size = desc->alloc = dst_size; | |
1673 | return 0; | |
1674 | } | |
1675 | ||
051308f6 | 1676 | static int apply_binary(struct buffer_desc *desc, struct patch *patch) |
3cca928d | 1677 | { |
011f4274 | 1678 | const char *name = patch->old_name ? patch->old_name : patch->new_name; |
051308f6 JH |
1679 | unsigned char sha1[20]; |
1680 | unsigned char hdr[50]; | |
1681 | int hdrlen; | |
011f4274 | 1682 | |
051308f6 JH |
1683 | if (!allow_binary_replacement) |
1684 | return error("cannot apply binary patch to '%s' " | |
1685 | "without --allow-binary-replacement", | |
1686 | name); | |
011f4274 | 1687 | |
051308f6 JH |
1688 | /* For safety, we require patch index line to contain |
1689 | * full 40-byte textual SHA1 for old and new, at least for now. | |
1690 | */ | |
1691 | if (strlen(patch->old_sha1_prefix) != 40 || | |
1692 | strlen(patch->new_sha1_prefix) != 40 || | |
1693 | get_sha1_hex(patch->old_sha1_prefix, sha1) || | |
1694 | get_sha1_hex(patch->new_sha1_prefix, sha1)) | |
1695 | return error("cannot apply binary patch to '%s' " | |
1696 | "without full index line", name); | |
011f4274 | 1697 | |
051308f6 JH |
1698 | if (patch->old_name) { |
1699 | /* See if the old one matches what the patch | |
1700 | * applies to. | |
011f4274 | 1701 | */ |
051308f6 JH |
1702 | write_sha1_file_prepare(desc->buffer, desc->size, |
1703 | blob_type, sha1, hdr, &hdrlen); | |
1704 | if (strcmp(sha1_to_hex(sha1), patch->old_sha1_prefix)) | |
1705 | return error("the patch applies to '%s' (%s), " | |
1706 | "which does not match the " | |
1707 | "current contents.", | |
1708 | name, sha1_to_hex(sha1)); | |
1709 | } | |
1710 | else { | |
1711 | /* Otherwise, the old one must be empty. */ | |
1712 | if (desc->size) | |
1713 | return error("the patch applies to an empty " | |
1714 | "'%s' but it is not empty", name); | |
1715 | } | |
011f4274 | 1716 | |
0660626c | 1717 | get_sha1_hex(patch->new_sha1_prefix, sha1); |
0bef57ee | 1718 | if (is_null_sha1(sha1)) { |
051308f6 JH |
1719 | free(desc->buffer); |
1720 | desc->alloc = desc->size = 0; | |
0660626c | 1721 | desc->buffer = NULL; |
051308f6 | 1722 | return 0; /* deletion patch */ |
0660626c | 1723 | } |
011f4274 | 1724 | |
051308f6 | 1725 | if (has_sha1_file(sha1)) { |
0660626c | 1726 | /* We already have the postimage */ |
051308f6 JH |
1727 | char type[10]; |
1728 | unsigned long size; | |
1729 | ||
0660626c | 1730 | free(desc->buffer); |
051308f6 JH |
1731 | desc->buffer = read_sha1_file(sha1, type, &size); |
1732 | if (!desc->buffer) | |
1733 | return error("the necessary postimage %s for " | |
1734 | "'%s' cannot be read", | |
1735 | patch->new_sha1_prefix, name); | |
1736 | desc->alloc = desc->size = size; | |
1737 | } | |
1738 | else { | |
0660626c JH |
1739 | /* We have verified desc matches the preimage; |
1740 | * apply the patch data to it, which is stored | |
1741 | * in the patch->fragments->{patch,size}. | |
011f4274 | 1742 | */ |
0660626c | 1743 | if (apply_binary_fragment(desc, patch)) |
051308f6 JH |
1744 | return error("binary patch does not apply to '%s'", |
1745 | name); | |
011f4274 | 1746 | |
051308f6 JH |
1747 | /* verify that the result matches */ |
1748 | write_sha1_file_prepare(desc->buffer, desc->size, blob_type, | |
1749 | sha1, hdr, &hdrlen); | |
1750 | if (strcmp(sha1_to_hex(sha1), patch->new_sha1_prefix)) | |
03eb8f8a | 1751 | return error("binary patch to '%s' creates incorrect result (expecting %s, got %s)", name, patch->new_sha1_prefix, sha1_to_hex(sha1)); |
011f4274 | 1752 | } |
3cca928d | 1753 | |
051308f6 JH |
1754 | return 0; |
1755 | } | |
1756 | ||
1757 | static int apply_fragments(struct buffer_desc *desc, struct patch *patch) | |
1758 | { | |
1759 | struct fragment *frag = patch->fragments; | |
1760 | const char *name = patch->old_name ? patch->old_name : patch->new_name; | |
1761 | ||
1762 | if (patch->is_binary) | |
1763 | return apply_binary(desc, patch); | |
1764 | ||
3cca928d | 1765 | while (frag) { |
57dc397c JH |
1766 | if (apply_one_fragment(desc, frag, patch->inaccurate_eof)) { |
1767 | error("patch failed: %s:%ld", name, frag->oldpos); | |
1768 | if (!apply_with_reject) | |
1769 | return -1; | |
1770 | frag->rejected = 1; | |
1771 | } | |
3cca928d LT |
1772 | frag = frag->next; |
1773 | } | |
30996652 | 1774 | return 0; |
3cca928d LT |
1775 | } |
1776 | ||
04e4888e | 1777 | static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *ce) |
3cca928d | 1778 | { |
6e7c92a9 LT |
1779 | char *buf; |
1780 | unsigned long size, alloc; | |
1781 | struct buffer_desc desc; | |
3cca928d | 1782 | |
30996652 LT |
1783 | size = 0; |
1784 | alloc = 0; | |
1785 | buf = NULL; | |
04e4888e JH |
1786 | if (cached) { |
1787 | if (ce) { | |
1788 | char type[20]; | |
1789 | buf = read_sha1_file(ce->sha1, type, &size); | |
1790 | if (!buf) | |
1791 | return error("read of %s failed", | |
1792 | patch->old_name); | |
1793 | alloc = size; | |
1794 | } | |
1795 | } | |
1796 | else if (patch->old_name) { | |
30996652 LT |
1797 | size = st->st_size; |
1798 | alloc = size + 8192; | |
1799 | buf = xmalloc(alloc); | |
1800 | if (read_old_data(st, patch->old_name, buf, alloc) != size) | |
1801 | return error("read of %s failed", patch->old_name); | |
1802 | } | |
6e7c92a9 LT |
1803 | |
1804 | desc.size = size; | |
1805 | desc.alloc = alloc; | |
1806 | desc.buffer = buf; | |
57dc397c | 1807 | |
6e7c92a9 | 1808 | if (apply_fragments(&desc, patch) < 0) |
57dc397c | 1809 | return -1; /* note with --reject this succeeds. */ |
2c71810b JH |
1810 | |
1811 | /* NUL terminate the result */ | |
242abf10 | 1812 | if (desc.alloc <= desc.size) |
2c71810b | 1813 | desc.buffer = xrealloc(desc.buffer, desc.size + 1); |
2c71810b JH |
1814 | desc.buffer[desc.size] = 0; |
1815 | ||
6e7c92a9 LT |
1816 | patch->result = desc.buffer; |
1817 | patch->resultsize = desc.size; | |
5aa7d94c LT |
1818 | |
1819 | if (patch->is_delete && patch->resultsize) | |
1820 | return error("removal patch leaves file contents"); | |
1821 | ||
3cca928d LT |
1822 | return 0; |
1823 | } | |
1824 | ||
7f95aef2 | 1825 | static int check_patch(struct patch *patch, struct patch *prev_patch) |
fab2c257 | 1826 | { |
a577284a | 1827 | struct stat st; |
fab2c257 LT |
1828 | const char *old_name = patch->old_name; |
1829 | const char *new_name = patch->new_name; | |
011f4274 | 1830 | const char *name = old_name ? old_name : new_name; |
04e4888e | 1831 | struct cache_entry *ce = NULL; |
7f95aef2 | 1832 | int ok_if_exists; |
fab2c257 | 1833 | |
57dc397c | 1834 | patch->rejected = 1; /* we will drop this after we succeed */ |
fab2c257 | 1835 | if (old_name) { |
04e4888e JH |
1836 | int changed = 0; |
1837 | int stat_ret = 0; | |
1838 | unsigned st_mode = 0; | |
a577284a | 1839 | |
04e4888e JH |
1840 | if (!cached) |
1841 | stat_ret = lstat(old_name, &st); | |
3cca928d LT |
1842 | if (check_index) { |
1843 | int pos = cache_name_pos(old_name, strlen(old_name)); | |
1844 | if (pos < 0) | |
56d33b11 JH |
1845 | return error("%s: does not exist in index", |
1846 | old_name); | |
04e4888e | 1847 | ce = active_cache[pos]; |
56d33b11 JH |
1848 | if (stat_ret < 0) { |
1849 | struct checkout costate; | |
1850 | if (errno != ENOENT) | |
1851 | return error("%s: %s", old_name, | |
1852 | strerror(errno)); | |
1853 | /* checkout */ | |
1854 | costate.base_dir = ""; | |
1855 | costate.base_dir_len = 0; | |
1856 | costate.force = 0; | |
1857 | costate.quiet = 0; | |
1858 | costate.not_new = 0; | |
1859 | costate.refresh_cache = 1; | |
04e4888e | 1860 | if (checkout_entry(ce, |
de84f99c SP |
1861 | &costate, |
1862 | NULL) || | |
56d33b11 JH |
1863 | lstat(old_name, &st)) |
1864 | return -1; | |
1865 | } | |
04e4888e JH |
1866 | if (!cached) |
1867 | changed = ce_match_stat(ce, &st, 1); | |
3cca928d | 1868 | if (changed) |
56d33b11 JH |
1869 | return error("%s: does not match index", |
1870 | old_name); | |
04e4888e JH |
1871 | if (cached) |
1872 | st_mode = ntohl(ce->ce_mode); | |
3cca928d | 1873 | } |
56d33b11 JH |
1874 | else if (stat_ret < 0) |
1875 | return error("%s: %s", old_name, strerror(errno)); | |
1876 | ||
04e4888e JH |
1877 | if (!cached) |
1878 | st_mode = ntohl(create_ce_mode(st.st_mode)); | |
1879 | ||
3cca928d LT |
1880 | if (patch->is_new < 0) |
1881 | patch->is_new = 0; | |
a577284a | 1882 | if (!patch->old_mode) |
04e4888e JH |
1883 | patch->old_mode = st_mode; |
1884 | if ((st_mode ^ patch->old_mode) & S_IFMT) | |
3cca928d | 1885 | return error("%s: wrong type", old_name); |
04e4888e | 1886 | if (st_mode != patch->old_mode) |
3cca928d | 1887 | fprintf(stderr, "warning: %s has type %o, expected %o\n", |
04e4888e | 1888 | old_name, st_mode, patch->old_mode); |
fab2c257 | 1889 | } |
a577284a | 1890 | |
7f95aef2 JH |
1891 | if (new_name && prev_patch && prev_patch->is_delete && |
1892 | !strcmp(prev_patch->old_name, new_name)) | |
1893 | /* A type-change diff is always split into a patch to | |
1894 | * delete old, immediately followed by a patch to | |
1895 | * create new (see diff.c::run_diff()); in such a case | |
1896 | * it is Ok that the entry to be deleted by the | |
1897 | * previous patch is still in the working tree and in | |
1898 | * the index. | |
1899 | */ | |
1900 | ok_if_exists = 1; | |
1901 | else | |
1902 | ok_if_exists = 0; | |
1903 | ||
fab2c257 | 1904 | if (new_name && (patch->is_new | patch->is_rename | patch->is_copy)) { |
7f95aef2 JH |
1905 | if (check_index && |
1906 | cache_name_pos(new_name, strlen(new_name)) >= 0 && | |
1907 | !ok_if_exists) | |
a577284a | 1908 | return error("%s: already exists in index", new_name); |
d91d4c2c | 1909 | if (!cached) { |
c28c571c JH |
1910 | struct stat nst; |
1911 | if (!lstat(new_name, &nst)) { | |
7f95aef2 | 1912 | if (S_ISDIR(nst.st_mode) || ok_if_exists) |
c28c571c JH |
1913 | ; /* ok */ |
1914 | else | |
1915 | return error("%s: already exists in working directory", new_name); | |
1916 | } | |
1917 | else if ((errno != ENOENT) && (errno != ENOTDIR)) | |
d91d4c2c JH |
1918 | return error("%s: %s", new_name, strerror(errno)); |
1919 | } | |
35cc4bcd JS |
1920 | if (!patch->new_mode) { |
1921 | if (patch->is_new) | |
1922 | patch->new_mode = S_IFREG | 0644; | |
1923 | else | |
1924 | patch->new_mode = patch->old_mode; | |
1925 | } | |
fab2c257 | 1926 | } |
3cca928d LT |
1927 | |
1928 | if (new_name && old_name) { | |
1929 | int same = !strcmp(old_name, new_name); | |
1930 | if (!patch->new_mode) | |
1931 | patch->new_mode = patch->old_mode; | |
1932 | if ((patch->old_mode ^ patch->new_mode) & S_IFMT) | |
1933 | return error("new mode (%o) of %s does not match old mode (%o)%s%s", | |
1934 | patch->new_mode, new_name, patch->old_mode, | |
1935 | same ? "" : " of ", same ? "" : old_name); | |
04e4888e | 1936 | } |
3cca928d | 1937 | |
04e4888e | 1938 | if (apply_data(patch, &st, ce) < 0) |
011f4274 | 1939 | return error("%s: patch does not apply", name); |
57dc397c | 1940 | patch->rejected = 0; |
a577284a | 1941 | return 0; |
fab2c257 LT |
1942 | } |
1943 | ||
a577284a | 1944 | static int check_patch_list(struct patch *patch) |
19c58fb8 | 1945 | { |
7f95aef2 | 1946 | struct patch *prev_patch = NULL; |
a577284a LT |
1947 | int error = 0; |
1948 | ||
7f95aef2 | 1949 | for (prev_patch = NULL; patch ; patch = patch->next) { |
a2bf404e JH |
1950 | if (apply_verbosely) |
1951 | say_patch_name(stderr, | |
1952 | "Checking patch ", patch, "...\n"); | |
7f95aef2 JH |
1953 | error |= check_patch(patch, prev_patch); |
1954 | prev_patch = patch; | |
1955 | } | |
a577284a LT |
1956 | return error; |
1957 | } | |
1958 | ||
2cf67f1e JH |
1959 | static void show_index_list(struct patch *list) |
1960 | { | |
1961 | struct patch *patch; | |
1962 | ||
1963 | /* Once we start supporting the reverse patch, it may be | |
1964 | * worth showing the new sha1 prefix, but until then... | |
1965 | */ | |
1966 | for (patch = list; patch; patch = patch->next) { | |
1967 | const unsigned char *sha1_ptr; | |
1968 | unsigned char sha1[20]; | |
1969 | const char *name; | |
1970 | ||
1971 | name = patch->old_name ? patch->old_name : patch->new_name; | |
1972 | if (patch->is_new) | |
1973 | sha1_ptr = null_sha1; | |
1974 | else if (get_sha1(patch->old_sha1_prefix, sha1)) | |
1975 | die("sha1 information is lacking or useless (%s).", | |
1976 | name); | |
1977 | else | |
1978 | sha1_ptr = sha1; | |
22943f1a JH |
1979 | |
1980 | printf("%06o %s ",patch->old_mode, sha1_to_hex(sha1_ptr)); | |
1981 | if (line_termination && quote_c_style(name, NULL, NULL, 0)) | |
1982 | quote_c_style(name, NULL, stdout, 0); | |
1983 | else | |
1984 | fputs(name, stdout); | |
1985 | putchar(line_termination); | |
2cf67f1e JH |
1986 | } |
1987 | } | |
1988 | ||
a577284a LT |
1989 | static void stat_patch_list(struct patch *patch) |
1990 | { | |
1991 | int files, adds, dels; | |
1992 | ||
1993 | for (files = adds = dels = 0 ; patch ; patch = patch->next) { | |
1994 | files++; | |
1995 | adds += patch->lines_added; | |
1996 | dels += patch->lines_deleted; | |
1997 | show_stats(patch); | |
1998 | } | |
1999 | ||
2000 | printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files, adds, dels); | |
3f40315a LT |
2001 | } |
2002 | ||
7d8b7c21 JH |
2003 | static void numstat_patch_list(struct patch *patch) |
2004 | { | |
2005 | for ( ; patch; patch = patch->next) { | |
2006 | const char *name; | |
49e3343c | 2007 | name = patch->new_name ? patch->new_name : patch->old_name; |
7d8b7c21 JH |
2008 | printf("%d\t%d\t", patch->lines_added, patch->lines_deleted); |
2009 | if (line_termination && quote_c_style(name, NULL, NULL, 0)) | |
2010 | quote_c_style(name, NULL, stdout, 0); | |
2011 | else | |
2012 | fputs(name, stdout); | |
2013 | putchar('\n'); | |
2014 | } | |
2015 | } | |
2016 | ||
96c912a4 JH |
2017 | static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name) |
2018 | { | |
2019 | if (mode) | |
2020 | printf(" %s mode %06o %s\n", newdelete, mode, name); | |
2021 | else | |
2022 | printf(" %s %s\n", newdelete, name); | |
2023 | } | |
2024 | ||
2025 | static void show_mode_change(struct patch *p, int show_name) | |
2026 | { | |
2027 | if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) { | |
2028 | if (show_name) | |
2029 | printf(" mode change %06o => %06o %s\n", | |
2030 | p->old_mode, p->new_mode, p->new_name); | |
2031 | else | |
2032 | printf(" mode change %06o => %06o\n", | |
2033 | p->old_mode, p->new_mode); | |
2034 | } | |
2035 | } | |
2036 | ||
2037 | static void show_rename_copy(struct patch *p) | |
2038 | { | |
2039 | const char *renamecopy = p->is_rename ? "rename" : "copy"; | |
2040 | const char *old, *new; | |
2041 | ||
2042 | /* Find common prefix */ | |
2043 | old = p->old_name; | |
2044 | new = p->new_name; | |
2045 | while (1) { | |
2046 | const char *slash_old, *slash_new; | |
2047 | slash_old = strchr(old, '/'); | |
2048 | slash_new = strchr(new, '/'); | |
2049 | if (!slash_old || | |
2050 | !slash_new || | |
2051 | slash_old - old != slash_new - new || | |
2052 | memcmp(old, new, slash_new - new)) | |
2053 | break; | |
2054 | old = slash_old + 1; | |
2055 | new = slash_new + 1; | |
2056 | } | |
2057 | /* p->old_name thru old is the common prefix, and old and new | |
2058 | * through the end of names are renames | |
2059 | */ | |
2060 | if (old != p->old_name) | |
2061 | printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy, | |
e30e814d | 2062 | (int)(old - p->old_name), p->old_name, |
96c912a4 JH |
2063 | old, new, p->score); |
2064 | else | |
2065 | printf(" %s %s => %s (%d%%)\n", renamecopy, | |
2066 | p->old_name, p->new_name, p->score); | |
2067 | show_mode_change(p, 0); | |
2068 | } | |
2069 | ||
2070 | static void summary_patch_list(struct patch *patch) | |
2071 | { | |
2072 | struct patch *p; | |
2073 | ||
2074 | for (p = patch; p; p = p->next) { | |
2075 | if (p->is_new) | |
2076 | show_file_mode_name("create", p->new_mode, p->new_name); | |
2077 | else if (p->is_delete) | |
2078 | show_file_mode_name("delete", p->old_mode, p->old_name); | |
2079 | else { | |
2080 | if (p->is_rename || p->is_copy) | |
2081 | show_rename_copy(p); | |
2082 | else { | |
2083 | if (p->score) { | |
2084 | printf(" rewrite %s (%d%%)\n", | |
2085 | p->new_name, p->score); | |
2086 | show_mode_change(p, 0); | |
2087 | } | |
2088 | else | |
2089 | show_mode_change(p, 1); | |
2090 | } | |
2091 | } | |
2092 | } | |
2093 | } | |
2094 | ||
3f40315a LT |
2095 | static void patch_stats(struct patch *patch) |
2096 | { | |
2097 | int lines = patch->lines_added + patch->lines_deleted; | |
2098 | ||
2099 | if (lines > max_change) | |
2100 | max_change = lines; | |
2101 | if (patch->old_name) { | |
22943f1a JH |
2102 | int len = quote_c_style(patch->old_name, NULL, NULL, 0); |
2103 | if (!len) | |
2104 | len = strlen(patch->old_name); | |
3f40315a LT |
2105 | if (len > max_len) |
2106 | max_len = len; | |
2107 | } | |
2108 | if (patch->new_name) { | |
22943f1a JH |
2109 | int len = quote_c_style(patch->new_name, NULL, NULL, 0); |
2110 | if (!len) | |
2111 | len = strlen(patch->new_name); | |
3f40315a LT |
2112 | if (len > max_len) |
2113 | max_len = len; | |
2114 | } | |
19c58fb8 LT |
2115 | } |
2116 | ||
5aa7d94c LT |
2117 | static void remove_file(struct patch *patch) |
2118 | { | |
2119 | if (write_index) { | |
2120 | if (remove_file_from_cache(patch->old_name) < 0) | |
2121 | die("unable to remove %s from index", patch->old_name); | |
03ac6e64 | 2122 | cache_tree_invalidate_path(active_cache_tree, patch->old_name); |
5aa7d94c | 2123 | } |
04e4888e JH |
2124 | if (!cached) |
2125 | unlink(patch->old_name); | |
5aa7d94c LT |
2126 | } |
2127 | ||
2128 | static void add_index_file(const char *path, unsigned mode, void *buf, unsigned long size) | |
2129 | { | |
2130 | struct stat st; | |
2131 | struct cache_entry *ce; | |
2132 | int namelen = strlen(path); | |
2133 | unsigned ce_size = cache_entry_size(namelen); | |
2134 | ||
2135 | if (!write_index) | |
2136 | return; | |
2137 | ||
90321c10 | 2138 | ce = xcalloc(1, ce_size); |
5aa7d94c LT |
2139 | memcpy(ce->name, path, namelen); |
2140 | ce->ce_mode = create_ce_mode(mode); | |
2141 | ce->ce_flags = htons(namelen); | |
04e4888e JH |
2142 | if (!cached) { |
2143 | if (lstat(path, &st) < 0) | |
2144 | die("unable to stat newly created file %s", path); | |
2145 | fill_stat_cache_info(ce, &st); | |
2146 | } | |
8e440259 | 2147 | if (write_sha1_file(buf, size, blob_type, ce->sha1) < 0) |
5aa7d94c LT |
2148 | die("unable to create backing store for newly created file %s", path); |
2149 | if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0) | |
2150 | die("unable to add cache entry for %s", path); | |
2151 | } | |
2152 | ||
1b668341 LT |
2153 | static int try_create_file(const char *path, unsigned int mode, const char *buf, unsigned long size) |
2154 | { | |
2155 | int fd; | |
2156 | ||
2157 | if (S_ISLNK(mode)) | |
2c71810b JH |
2158 | /* Although buf:size is counted string, it also is NUL |
2159 | * terminated. | |
2160 | */ | |
1b668341 | 2161 | return symlink(buf, path); |
781411ed | 2162 | fd = open(path, O_CREAT | O_EXCL | O_WRONLY, (mode & 0100) ? 0777 : 0666); |
1b668341 LT |
2163 | if (fd < 0) |
2164 | return -1; | |
2165 | while (size) { | |
1c15afb9 JH |
2166 | int written = xwrite(fd, buf, size); |
2167 | if (written < 0) | |
1b668341 | 2168 | die("writing file %s: %s", path, strerror(errno)); |
1b668341 LT |
2169 | if (!written) |
2170 | die("out of space writing file %s", path); | |
2171 | buf += written; | |
2172 | size -= written; | |
2173 | } | |
2174 | if (close(fd) < 0) | |
2175 | die("closing file %s: %s", path, strerror(errno)); | |
2176 | return 0; | |
2177 | } | |
2178 | ||
5c8af185 LT |
2179 | /* |
2180 | * We optimistically assume that the directories exist, | |
2181 | * which is true 99% of the time anyway. If they don't, | |
2182 | * we create them and try again. | |
2183 | */ | |
8361e1d4 | 2184 | static void create_one_file(char *path, unsigned mode, const char *buf, unsigned long size) |
5c8af185 | 2185 | { |
04e4888e JH |
2186 | if (cached) |
2187 | return; | |
1b668341 LT |
2188 | if (!try_create_file(path, mode, buf, size)) |
2189 | return; | |
5c8af185 | 2190 | |
1b668341 | 2191 | if (errno == ENOENT) { |
8361e1d4 JR |
2192 | if (safe_create_leading_directories(path)) |
2193 | return; | |
1b668341 LT |
2194 | if (!try_create_file(path, mode, buf, size)) |
2195 | return; | |
5c8af185 | 2196 | } |
5c8af185 | 2197 | |
56ac168f | 2198 | if (errno == EEXIST || errno == EACCES) { |
c28c571c JH |
2199 | /* We may be trying to create a file where a directory |
2200 | * used to be. | |
2201 | */ | |
2202 | struct stat st; | |
2203 | errno = 0; | |
2204 | if (!lstat(path, &st) && S_ISDIR(st.st_mode) && !rmdir(path)) | |
2205 | errno = EEXIST; | |
2206 | } | |
2207 | ||
1b668341 LT |
2208 | if (errno == EEXIST) { |
2209 | unsigned int nr = getpid(); | |
5c8af185 | 2210 | |
1b668341 LT |
2211 | for (;;) { |
2212 | const char *newpath; | |
2213 | newpath = mkpath("%s~%u", path, nr); | |
2214 | if (!try_create_file(newpath, mode, buf, size)) { | |
2215 | if (!rename(newpath, path)) | |
2216 | return; | |
2217 | unlink(newpath); | |
2218 | break; | |
2219 | } | |
2220 | if (errno != EEXIST) | |
2221 | break; | |
d9e08be9 AR |
2222 | ++nr; |
2223 | } | |
5c8af185 | 2224 | } |
1b668341 | 2225 | die("unable to write file %s mode %o", path, mode); |
5c8af185 LT |
2226 | } |
2227 | ||
5aa7d94c LT |
2228 | static void create_file(struct patch *patch) |
2229 | { | |
8361e1d4 | 2230 | char *path = patch->new_name; |
5aa7d94c LT |
2231 | unsigned mode = patch->new_mode; |
2232 | unsigned long size = patch->resultsize; | |
2233 | char *buf = patch->result; | |
2234 | ||
2235 | if (!mode) | |
2236 | mode = S_IFREG | 0644; | |
03ac6e64 | 2237 | create_one_file(path, mode, buf, size); |
1b668341 | 2238 | add_index_file(path, mode, buf, size); |
03ac6e64 | 2239 | cache_tree_invalidate_path(active_cache_tree, path); |
5aa7d94c LT |
2240 | } |
2241 | ||
eed46644 JH |
2242 | /* phase zero is to remove, phase one is to create */ |
2243 | static void write_out_one_result(struct patch *patch, int phase) | |
5aa7d94c LT |
2244 | { |
2245 | if (patch->is_delete > 0) { | |
eed46644 JH |
2246 | if (phase == 0) |
2247 | remove_file(patch); | |
5aa7d94c LT |
2248 | return; |
2249 | } | |
2250 | if (patch->is_new > 0 || patch->is_copy) { | |
eed46644 JH |
2251 | if (phase == 1) |
2252 | create_file(patch); | |
5aa7d94c LT |
2253 | return; |
2254 | } | |
2255 | /* | |
2256 | * Rename or modification boils down to the same | |
2257 | * thing: remove the old, write the new | |
2258 | */ | |
eed46644 JH |
2259 | if (phase == 0) |
2260 | remove_file(patch); | |
2261 | if (phase == 1) | |
57dc397c | 2262 | create_file(patch); |
5aa7d94c LT |
2263 | } |
2264 | ||
57dc397c JH |
2265 | static int write_out_one_reject(struct patch *patch) |
2266 | { | |
82e2765f JH |
2267 | FILE *rej; |
2268 | char namebuf[PATH_MAX]; | |
57dc397c | 2269 | struct fragment *frag; |
82e2765f | 2270 | int cnt = 0; |
57dc397c | 2271 | |
82e2765f | 2272 | for (cnt = 0, frag = patch->fragments; frag; frag = frag->next) { |
57dc397c JH |
2273 | if (!frag->rejected) |
2274 | continue; | |
82e2765f JH |
2275 | cnt++; |
2276 | } | |
2277 | ||
a2bf404e JH |
2278 | if (!cnt) { |
2279 | if (apply_verbosely) | |
2280 | say_patch_name(stderr, | |
2281 | "Applied patch ", patch, " cleanly.\n"); | |
82e2765f | 2282 | return 0; |
a2bf404e | 2283 | } |
82e2765f JH |
2284 | |
2285 | /* This should not happen, because a removal patch that leaves | |
2286 | * contents are marked "rejected" at the patch level. | |
2287 | */ | |
2288 | if (!patch->new_name) | |
2289 | die("internal error"); | |
2290 | ||
a2bf404e JH |
2291 | /* Say this even without --verbose */ |
2292 | say_patch_name(stderr, "Applying patch ", patch, " with"); | |
2293 | fprintf(stderr, " %d rejects...\n", cnt); | |
2294 | ||
82e2765f JH |
2295 | cnt = strlen(patch->new_name); |
2296 | if (ARRAY_SIZE(namebuf) <= cnt + 5) { | |
2297 | cnt = ARRAY_SIZE(namebuf) - 5; | |
2298 | fprintf(stderr, | |
2299 | "warning: truncating .rej filename to %.*s.rej", | |
2300 | cnt - 1, patch->new_name); | |
2301 | } | |
2302 | memcpy(namebuf, patch->new_name, cnt); | |
2303 | memcpy(namebuf + cnt, ".rej", 5); | |
2304 | ||
2305 | rej = fopen(namebuf, "w"); | |
2306 | if (!rej) | |
2307 | return error("cannot open %s: %s", namebuf, strerror(errno)); | |
2308 | ||
2309 | /* Normal git tools never deal with .rej, so do not pretend | |
2310 | * this is a git patch by saying --git nor give extended | |
2311 | * headers. While at it, maybe please "kompare" that wants | |
2312 | * the trailing TAB and some garbage at the end of line ;-). | |
2313 | */ | |
2314 | fprintf(rej, "diff a/%s b/%s\t(rejected hunks)\n", | |
2315 | patch->new_name, patch->new_name); | |
0e9ee323 | 2316 | for (cnt = 1, frag = patch->fragments; |
82e2765f JH |
2317 | frag; |
2318 | cnt++, frag = frag->next) { | |
2319 | if (!frag->rejected) { | |
2320 | fprintf(stderr, "Hunk #%d applied cleanly.\n", cnt); | |
2321 | continue; | |
57dc397c | 2322 | } |
82e2765f JH |
2323 | fprintf(stderr, "Rejected hunk #%d.\n", cnt); |
2324 | fprintf(rej, "%.*s", frag->size, frag->patch); | |
57dc397c | 2325 | if (frag->patch[frag->size-1] != '\n') |
82e2765f | 2326 | fputc('\n', rej); |
57dc397c | 2327 | } |
82e2765f JH |
2328 | fclose(rej); |
2329 | return -1; | |
57dc397c JH |
2330 | } |
2331 | ||
2332 | static int write_out_results(struct patch *list, int skipped_patch) | |
5aa7d94c | 2333 | { |
eed46644 | 2334 | int phase; |
57dc397c JH |
2335 | int errs = 0; |
2336 | struct patch *l; | |
eed46644 | 2337 | |
d854f783 | 2338 | if (!list && !skipped_patch) |
57dc397c | 2339 | return error("No changes"); |
f7b79707 | 2340 | |
eed46644 | 2341 | for (phase = 0; phase < 2; phase++) { |
57dc397c JH |
2342 | l = list; |
2343 | while (l) { | |
2344 | if (l->rejected) | |
2345 | errs = 1; | |
82e2765f | 2346 | else { |
57dc397c | 2347 | write_out_one_result(l, phase); |
82e2765f | 2348 | if (phase == 1 && write_out_one_reject(l)) |
57dc397c JH |
2349 | errs = 1; |
2350 | } | |
eed46644 JH |
2351 | l = l->next; |
2352 | } | |
5aa7d94c | 2353 | } |
57dc397c | 2354 | return errs; |
5aa7d94c LT |
2355 | } |
2356 | ||
021b6e45 | 2357 | static struct lock_file lock_file; |
5aa7d94c | 2358 | |
d854f783 JH |
2359 | static struct excludes { |
2360 | struct excludes *next; | |
2361 | const char *path; | |
2362 | } *excludes; | |
2363 | ||
2364 | static int use_patch(struct patch *p) | |
2365 | { | |
c7c81b3a | 2366 | const char *pathname = p->new_name ? p->new_name : p->old_name; |
d854f783 JH |
2367 | struct excludes *x = excludes; |
2368 | while (x) { | |
2369 | if (fnmatch(x->path, pathname, 0) == 0) | |
2370 | return 0; | |
2371 | x = x->next; | |
2372 | } | |
edf2e370 JH |
2373 | if (0 < prefix_length) { |
2374 | int pathlen = strlen(pathname); | |
2375 | if (pathlen <= prefix_length || | |
2376 | memcmp(prefix, pathname, prefix_length)) | |
2377 | return 0; | |
2378 | } | |
d854f783 JH |
2379 | return 1; |
2380 | } | |
2381 | ||
f686d030 | 2382 | static int apply_patch(int fd, const char *filename, int inaccurate_eof) |
c1bb9350 LT |
2383 | { |
2384 | unsigned long offset, size; | |
2385 | char *buffer = read_patch_file(fd, &size); | |
19c58fb8 | 2386 | struct patch *list = NULL, **listp = &list; |
d854f783 | 2387 | int skipped_patch = 0; |
c1bb9350 | 2388 | |
b5767dd6 | 2389 | patch_input_file = filename; |
c1bb9350 LT |
2390 | if (!buffer) |
2391 | return -1; | |
2392 | offset = 0; | |
2393 | while (size > 0) { | |
19c58fb8 LT |
2394 | struct patch *patch; |
2395 | int nr; | |
2396 | ||
90321c10 | 2397 | patch = xcalloc(1, sizeof(*patch)); |
3eaa38da | 2398 | patch->inaccurate_eof = inaccurate_eof; |
19c58fb8 | 2399 | nr = parse_chunk(buffer + offset, size, patch); |
c1bb9350 LT |
2400 | if (nr < 0) |
2401 | break; | |
f686d030 | 2402 | if (apply_in_reverse) |
e5a94313 | 2403 | reverse_patches(patch); |
d854f783 JH |
2404 | if (use_patch(patch)) { |
2405 | patch_stats(patch); | |
2406 | *listp = patch; | |
2407 | listp = &patch->next; | |
2408 | } else { | |
2409 | /* perhaps free it a bit better? */ | |
2410 | free(patch); | |
2411 | skipped_patch++; | |
2412 | } | |
c1bb9350 LT |
2413 | offset += nr; |
2414 | size -= nr; | |
2415 | } | |
19c58fb8 | 2416 | |
b5767dd6 JH |
2417 | if (whitespace_error && (new_whitespace == error_on_whitespace)) |
2418 | apply = 0; | |
2419 | ||
5aa7d94c | 2420 | write_index = check_index && apply; |
40aaae88 | 2421 | if (write_index && newfd < 0) |
021b6e45 | 2422 | newfd = hold_lock_file_for_update(&lock_file, |
40aaae88 | 2423 | get_index_file(), 1); |
5aa7d94c LT |
2424 | if (check_index) { |
2425 | if (read_cache() < 0) | |
2426 | die("unable to read index file"); | |
2427 | } | |
2428 | ||
57dc397c JH |
2429 | if ((check || apply) && |
2430 | check_patch_list(list) < 0 && | |
2431 | !apply_with_reject) | |
a577284a LT |
2432 | exit(1); |
2433 | ||
57dc397c JH |
2434 | if (apply && write_out_results(list, skipped_patch)) |
2435 | exit(1); | |
5aa7d94c | 2436 | |
2cf67f1e JH |
2437 | if (show_index_info) |
2438 | show_index_list(list); | |
2439 | ||
a577284a LT |
2440 | if (diffstat) |
2441 | stat_patch_list(list); | |
19c58fb8 | 2442 | |
7d8b7c21 JH |
2443 | if (numstat) |
2444 | numstat_patch_list(list); | |
2445 | ||
96c912a4 JH |
2446 | if (summary) |
2447 | summary_patch_list(list); | |
2448 | ||
c1bb9350 LT |
2449 | free(buffer); |
2450 | return 0; | |
2451 | } | |
2452 | ||
2ae1c53b JH |
2453 | static int git_apply_config(const char *var, const char *value) |
2454 | { | |
2455 | if (!strcmp(var, "apply.whitespace")) { | |
2456 | apply_default_whitespace = strdup(value); | |
2457 | return 0; | |
2458 | } | |
2459 | return git_default_config(var, value); | |
2460 | } | |
2461 | ||
2462 | ||
a633fca0 | 2463 | int cmd_apply(int argc, const char **argv, const char *prefix) |
c1bb9350 LT |
2464 | { |
2465 | int i; | |
4dfdbe10 | 2466 | int read_stdin = 1; |
3eaa38da | 2467 | int inaccurate_eof = 0; |
57dc397c | 2468 | int errs = 0; |
3eaa38da | 2469 | |
2ae1c53b | 2470 | const char *whitespace_option = NULL; |
c1bb9350 | 2471 | |
c1bb9350 LT |
2472 | for (i = 1; i < argc; i++) { |
2473 | const char *arg = argv[i]; | |
47495887 | 2474 | char *end; |
c1bb9350 LT |
2475 | int fd; |
2476 | ||
2477 | if (!strcmp(arg, "-")) { | |
57dc397c | 2478 | errs |= apply_patch(0, "<stdin>", inaccurate_eof); |
4dfdbe10 | 2479 | read_stdin = 0; |
c1bb9350 LT |
2480 | continue; |
2481 | } | |
d854f783 JH |
2482 | if (!strncmp(arg, "--exclude=", 10)) { |
2483 | struct excludes *x = xmalloc(sizeof(*x)); | |
2484 | x->path = arg + 10; | |
2485 | x->next = excludes; | |
2486 | excludes = x; | |
2487 | continue; | |
2488 | } | |
e36f8b60 DB |
2489 | if (!strncmp(arg, "-p", 2)) { |
2490 | p_value = atoi(arg + 2); | |
2491 | continue; | |
2492 | } | |
cb93c193 JH |
2493 | if (!strcmp(arg, "--no-add")) { |
2494 | no_add = 1; | |
2495 | continue; | |
2496 | } | |
fab2c257 | 2497 | if (!strcmp(arg, "--stat")) { |
a577284a | 2498 | apply = 0; |
fab2c257 LT |
2499 | diffstat = 1; |
2500 | continue; | |
2501 | } | |
0660626c JH |
2502 | if (!strcmp(arg, "--allow-binary-replacement") || |
2503 | !strcmp(arg, "--binary")) { | |
011f4274 JH |
2504 | allow_binary_replacement = 1; |
2505 | continue; | |
2506 | } | |
7d8b7c21 JH |
2507 | if (!strcmp(arg, "--numstat")) { |
2508 | apply = 0; | |
2509 | numstat = 1; | |
2510 | continue; | |
2511 | } | |
96c912a4 JH |
2512 | if (!strcmp(arg, "--summary")) { |
2513 | apply = 0; | |
2514 | summary = 1; | |
2515 | continue; | |
2516 | } | |
a577284a LT |
2517 | if (!strcmp(arg, "--check")) { |
2518 | apply = 0; | |
2519 | check = 1; | |
2520 | continue; | |
2521 | } | |
3cca928d LT |
2522 | if (!strcmp(arg, "--index")) { |
2523 | check_index = 1; | |
2524 | continue; | |
2525 | } | |
04e4888e JH |
2526 | if (!strcmp(arg, "--cached")) { |
2527 | check_index = 1; | |
2528 | cached = 1; | |
2529 | continue; | |
2530 | } | |
aefa4a5b LT |
2531 | if (!strcmp(arg, "--apply")) { |
2532 | apply = 1; | |
2533 | continue; | |
2534 | } | |
22943f1a | 2535 | if (!strcmp(arg, "--index-info")) { |
2cf67f1e JH |
2536 | apply = 0; |
2537 | show_index_info = 1; | |
2538 | continue; | |
2539 | } | |
22943f1a JH |
2540 | if (!strcmp(arg, "-z")) { |
2541 | line_termination = 0; | |
2542 | continue; | |
2543 | } | |
47495887 EB |
2544 | if (!strncmp(arg, "-C", 2)) { |
2545 | p_context = strtoul(arg + 2, &end, 0); | |
2546 | if (*end != '\0') | |
2547 | die("unrecognized context count '%s'", arg + 2); | |
2548 | continue; | |
2549 | } | |
19bfcd5a | 2550 | if (!strncmp(arg, "--whitespace=", 13)) { |
2ae1c53b JH |
2551 | whitespace_option = arg + 13; |
2552 | parse_whitespace_option(arg + 13); | |
2553 | continue; | |
19bfcd5a | 2554 | } |
e5a94313 | 2555 | if (!strcmp(arg, "-R") || !strcmp(arg, "--reverse")) { |
f686d030 | 2556 | apply_in_reverse = 1; |
e5a94313 JS |
2557 | continue; |
2558 | } | |
57dc397c | 2559 | if (!strcmp(arg, "--reject")) { |
8938045a | 2560 | apply = apply_with_reject = apply_verbosely = 1; |
57dc397c JH |
2561 | continue; |
2562 | } | |
a2bf404e JH |
2563 | if (!strcmp(arg, "--verbose")) { |
2564 | apply_verbosely = 1; | |
2565 | continue; | |
2566 | } | |
3eaa38da JS |
2567 | if (!strcmp(arg, "--inaccurate-eof")) { |
2568 | inaccurate_eof = 1; | |
2569 | continue; | |
2570 | } | |
edf2e370 JH |
2571 | |
2572 | if (check_index && prefix_length < 0) { | |
2573 | prefix = setup_git_directory(); | |
2574 | prefix_length = prefix ? strlen(prefix) : 0; | |
2ae1c53b JH |
2575 | git_config(git_apply_config); |
2576 | if (!whitespace_option && apply_default_whitespace) | |
2577 | parse_whitespace_option(apply_default_whitespace); | |
edf2e370 JH |
2578 | } |
2579 | if (0 < prefix_length) | |
2580 | arg = prefix_filename(prefix, prefix_length, arg); | |
2581 | ||
c1bb9350 LT |
2582 | fd = open(arg, O_RDONLY); |
2583 | if (fd < 0) | |
2584 | usage(apply_usage); | |
4dfdbe10 | 2585 | read_stdin = 0; |
f21d6726 | 2586 | set_default_whitespace_mode(whitespace_option); |
57dc397c | 2587 | errs |= apply_patch(fd, arg, inaccurate_eof); |
c1bb9350 LT |
2588 | close(fd); |
2589 | } | |
f21d6726 | 2590 | set_default_whitespace_mode(whitespace_option); |
4dfdbe10 | 2591 | if (read_stdin) |
57dc397c | 2592 | errs |= apply_patch(0, "<stdin>", inaccurate_eof); |
fc96b7c9 JH |
2593 | if (whitespace_error) { |
2594 | if (squelch_whitespace_errors && | |
2595 | squelch_whitespace_errors < whitespace_error) { | |
2596 | int squelched = | |
2597 | whitespace_error - squelch_whitespace_errors; | |
57dc397c JH |
2598 | fprintf(stderr, "warning: squelched %d " |
2599 | "whitespace error%s\n", | |
fc96b7c9 JH |
2600 | squelched, |
2601 | squelched == 1 ? "" : "s"); | |
2602 | } | |
2603 | if (new_whitespace == error_on_whitespace) | |
2604 | die("%d line%s add%s trailing whitespaces.", | |
2605 | whitespace_error, | |
2606 | whitespace_error == 1 ? "" : "s", | |
2607 | whitespace_error == 1 ? "s" : ""); | |
2608 | if (applied_after_stripping) | |
2609 | fprintf(stderr, "warning: %d line%s applied after" | |
2610 | " stripping trailing whitespaces.\n", | |
2611 | applied_after_stripping, | |
2612 | applied_after_stripping == 1 ? "" : "s"); | |
2613 | else if (whitespace_error) | |
2614 | fprintf(stderr, "warning: %d line%s add%s trailing" | |
2615 | " whitespaces.\n", | |
2616 | whitespace_error, | |
2617 | whitespace_error == 1 ? "" : "s", | |
2618 | whitespace_error == 1 ? "s" : ""); | |
2619 | } | |
dbd0f7d3 EW |
2620 | |
2621 | if (write_index) { | |
2622 | if (write_cache(newfd, active_cache, active_nr) || | |
6244b249 | 2623 | close(newfd) || commit_lock_file(&lock_file)) |
021b6e45 | 2624 | die("Unable to write new index file"); |
dbd0f7d3 EW |
2625 | } |
2626 | ||
57dc397c | 2627 | return !!errs; |
c1bb9350 | 2628 | } |