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Commit | Line | Data |
---|---|---|
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" |
22943f1a | 11 | #include "quote.h" |
c1bb9350 | 12 | |
a577284a LT |
13 | // --check turns on checking that the working tree matches the |
14 | // files that are being modified, but doesn't apply the patch | |
15 | // --stat does just a diffstat, and doesn't actually apply | |
7d8b7c21 | 16 | // --numstat does numeric diffstat, and doesn't actually apply |
22943f1a | 17 | // --index-info shows the old and new index info for paths if available. |
a577284a | 18 | // |
edf2e370 JH |
19 | static const char *prefix; |
20 | static int prefix_length = -1; | |
21 | ||
011f4274 | 22 | static int allow_binary_replacement = 0; |
3cca928d | 23 | static int check_index = 0; |
5aa7d94c | 24 | static int write_index = 0; |
fab2c257 | 25 | static int diffstat = 0; |
7d8b7c21 | 26 | static int numstat = 0; |
96c912a4 | 27 | static int summary = 0; |
a577284a LT |
28 | static int check = 0; |
29 | static int apply = 1; | |
cb93c193 | 30 | static int no_add = 0; |
2cf67f1e | 31 | static int show_index_info = 0; |
22943f1a | 32 | static int line_termination = '\n'; |
12dd6e8c | 33 | static const char apply_usage[] = |
011f4274 | 34 | "git-apply [--stat] [--numstat] [--summary] [--check] [--index] [--apply] [--no-add] [--index-info] [--allow-binary-replacement] [-z] <patch>..."; |
c1bb9350 | 35 | |
3f40315a LT |
36 | /* |
37 | * For "diff-stat" like behaviour, we keep track of the biggest change | |
38 | * we've seen, and the longest filename. That allows us to do simple | |
39 | * scaling. | |
40 | */ | |
41 | static int max_change, max_len; | |
42 | ||
a4acb0eb LT |
43 | /* |
44 | * Various "current state", notably line numbers and what | |
45 | * file (and how) we're patching right now.. The "is_xxxx" | |
46 | * things are flags, where -1 means "don't know yet". | |
47 | */ | |
46979f56 | 48 | static int linenr = 1; |
19c58fb8 LT |
49 | |
50 | struct fragment { | |
51 | unsigned long oldpos, oldlines; | |
52 | unsigned long newpos, newlines; | |
53 | const char *patch; | |
54 | int size; | |
55 | struct fragment *next; | |
56 | }; | |
57 | ||
58 | struct patch { | |
5041aa70 | 59 | char *new_name, *old_name, *def_name; |
19c58fb8 | 60 | unsigned int old_mode, new_mode; |
ff36de08 | 61 | int is_rename, is_copy, is_new, is_delete, is_binary; |
3f40315a | 62 | int lines_added, lines_deleted; |
96c912a4 | 63 | int score; |
19c58fb8 | 64 | struct fragment *fragments; |
5aa7d94c | 65 | char *result; |
3cca928d | 66 | unsigned long resultsize; |
2cf67f1e JH |
67 | char old_sha1_prefix[41]; |
68 | char new_sha1_prefix[41]; | |
19c58fb8 LT |
69 | struct patch *next; |
70 | }; | |
46979f56 | 71 | |
c1bb9350 | 72 | #define CHUNKSIZE (8192) |
a4acb0eb | 73 | #define SLOP (16) |
c1bb9350 LT |
74 | |
75 | static void *read_patch_file(int fd, unsigned long *sizep) | |
76 | { | |
77 | unsigned long size = 0, alloc = CHUNKSIZE; | |
78 | void *buffer = xmalloc(alloc); | |
79 | ||
80 | for (;;) { | |
81 | int nr = alloc - size; | |
82 | if (nr < 1024) { | |
83 | alloc += CHUNKSIZE; | |
84 | buffer = xrealloc(buffer, alloc); | |
85 | nr = alloc - size; | |
86 | } | |
87 | nr = read(fd, buffer + size, nr); | |
88 | if (!nr) | |
89 | break; | |
90 | if (nr < 0) { | |
91 | if (errno == EAGAIN) | |
92 | continue; | |
93 | die("git-apply: read returned %s", strerror(errno)); | |
94 | } | |
95 | size += nr; | |
96 | } | |
97 | *sizep = size; | |
a4acb0eb LT |
98 | |
99 | /* | |
100 | * Make sure that we have some slop in the buffer | |
101 | * so that we can do speculative "memcmp" etc, and | |
102 | * see to it that it is NUL-filled. | |
103 | */ | |
104 | if (alloc < size + SLOP) | |
105 | buffer = xrealloc(buffer, size + SLOP); | |
106 | memset(buffer + size, 0, SLOP); | |
c1bb9350 LT |
107 | return buffer; |
108 | } | |
109 | ||
3cca928d | 110 | static unsigned long linelen(const char *buffer, unsigned long size) |
c1bb9350 LT |
111 | { |
112 | unsigned long len = 0; | |
113 | while (size--) { | |
114 | len++; | |
115 | if (*buffer++ == '\n') | |
116 | break; | |
117 | } | |
118 | return len; | |
119 | } | |
120 | ||
a4acb0eb LT |
121 | static int is_dev_null(const char *str) |
122 | { | |
123 | return !memcmp("/dev/null", str, 9) && isspace(str[9]); | |
124 | } | |
125 | ||
381ca9a3 LT |
126 | #define TERM_SPACE 1 |
127 | #define TERM_TAB 2 | |
9a4a100e LT |
128 | |
129 | static int name_terminate(const char *name, int namelen, int c, int terminate) | |
130 | { | |
131 | if (c == ' ' && !(terminate & TERM_SPACE)) | |
132 | return 0; | |
133 | if (c == '\t' && !(terminate & TERM_TAB)) | |
134 | return 0; | |
135 | ||
9a4a100e LT |
136 | return 1; |
137 | } | |
138 | ||
139 | static char * find_name(const char *line, char *def, int p_value, int terminate) | |
c1bb9350 | 140 | { |
a4acb0eb LT |
141 | int len; |
142 | const char *start = line; | |
143 | char *name; | |
144 | ||
22943f1a JH |
145 | if (*line == '"') { |
146 | /* Proposed "new-style" GNU patch/diff format; see | |
147 | * http://marc.theaimsgroup.com/?l=git&m=112927316408690&w=2 | |
148 | */ | |
149 | name = unquote_c_style(line, NULL); | |
150 | if (name) { | |
151 | char *cp = name; | |
152 | while (p_value) { | |
153 | cp = strchr(name, '/'); | |
154 | if (!cp) | |
155 | break; | |
156 | cp++; | |
157 | p_value--; | |
158 | } | |
159 | if (cp) { | |
160 | /* name can later be freed, so we need | |
161 | * to memmove, not just return cp | |
162 | */ | |
163 | memmove(name, cp, strlen(cp) + 1); | |
164 | free(def); | |
165 | return name; | |
166 | } | |
167 | else { | |
168 | free(name); | |
169 | name = NULL; | |
170 | } | |
171 | } | |
172 | } | |
173 | ||
c1bb9350 | 174 | for (;;) { |
a4acb0eb | 175 | char c = *line; |
9a4a100e LT |
176 | |
177 | if (isspace(c)) { | |
178 | if (c == '\n') | |
179 | break; | |
180 | if (name_terminate(start, line-start, c, terminate)) | |
181 | break; | |
182 | } | |
a4acb0eb LT |
183 | line++; |
184 | if (c == '/' && !--p_value) | |
185 | start = line; | |
186 | } | |
187 | if (!start) | |
188 | return def; | |
189 | len = line - start; | |
190 | if (!len) | |
191 | return def; | |
192 | ||
193 | /* | |
194 | * Generally we prefer the shorter name, especially | |
195 | * if the other one is just a variation of that with | |
196 | * something else tacked on to the end (ie "file.orig" | |
197 | * or "file~"). | |
198 | */ | |
199 | if (def) { | |
200 | int deflen = strlen(def); | |
201 | if (deflen < len && !strncmp(start, def, deflen)) | |
202 | return def; | |
c1bb9350 | 203 | } |
a4acb0eb LT |
204 | |
205 | name = xmalloc(len + 1); | |
206 | memcpy(name, start, len); | |
207 | name[len] = 0; | |
208 | free(def); | |
209 | return name; | |
210 | } | |
211 | ||
212 | /* | |
213 | * Get the name etc info from the --/+++ lines of a traditional patch header | |
214 | * | |
215 | * NOTE! This hardcodes "-p1" behaviour in filename detection. | |
9a4a100e LT |
216 | * |
217 | * FIXME! The end-of-filename heuristics are kind of screwy. For existing | |
218 | * files, we can happily check the index for a match, but for creating a | |
219 | * new file we should try to match whatever "patch" does. I have no idea. | |
a4acb0eb | 220 | */ |
19c58fb8 | 221 | static void parse_traditional_patch(const char *first, const char *second, struct patch *patch) |
a4acb0eb LT |
222 | { |
223 | int p_value = 1; | |
224 | char *name; | |
225 | ||
226 | first += 4; // skip "--- " | |
227 | second += 4; // skip "+++ " | |
228 | if (is_dev_null(first)) { | |
19c58fb8 LT |
229 | patch->is_new = 1; |
230 | patch->is_delete = 0; | |
5041aa70 | 231 | name = find_name(second, NULL, p_value, TERM_SPACE | TERM_TAB); |
19c58fb8 | 232 | patch->new_name = name; |
a4acb0eb | 233 | } else if (is_dev_null(second)) { |
19c58fb8 LT |
234 | patch->is_new = 0; |
235 | patch->is_delete = 1; | |
381ca9a3 | 236 | name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB); |
19c58fb8 | 237 | patch->old_name = name; |
a4acb0eb | 238 | } else { |
381ca9a3 LT |
239 | name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB); |
240 | name = find_name(second, name, p_value, TERM_SPACE | TERM_TAB); | |
19c58fb8 | 241 | patch->old_name = patch->new_name = name; |
a4acb0eb LT |
242 | } |
243 | if (!name) | |
244 | die("unable to find filename in patch at line %d", linenr); | |
a4acb0eb LT |
245 | } |
246 | ||
19c58fb8 | 247 | static int gitdiff_hdrend(const char *line, struct patch *patch) |
a4acb0eb LT |
248 | { |
249 | return -1; | |
250 | } | |
251 | ||
1e3f6b6e LT |
252 | /* |
253 | * We're anal about diff header consistency, to make | |
254 | * sure that we don't end up having strange ambiguous | |
255 | * patches floating around. | |
256 | * | |
257 | * As a result, gitdiff_{old|new}name() will check | |
258 | * their names against any previous information, just | |
259 | * to make sure.. | |
260 | */ | |
261 | static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, const char *oldnew) | |
262 | { | |
1e3f6b6e LT |
263 | if (!orig_name && !isnull) |
264 | return find_name(line, NULL, 1, 0); | |
265 | ||
1e3f6b6e | 266 | if (orig_name) { |
22943f1a JH |
267 | int len; |
268 | const char *name; | |
269 | char *another; | |
1e3f6b6e LT |
270 | name = orig_name; |
271 | len = strlen(name); | |
272 | if (isnull) | |
273 | die("git-apply: bad git-diff - expected /dev/null, got %s on line %d", name, linenr); | |
22943f1a JH |
274 | another = find_name(line, NULL, 1, 0); |
275 | if (!another || memcmp(another, name, len)) | |
276 | die("git-apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr); | |
277 | free(another); | |
1e3f6b6e LT |
278 | return orig_name; |
279 | } | |
22943f1a JH |
280 | else { |
281 | /* expect "/dev/null" */ | |
282 | if (memcmp("/dev/null", line, 9) || line[9] != '\n') | |
283 | die("git-apply: bad git-diff - expected /dev/null on line %d", linenr); | |
284 | return NULL; | |
285 | } | |
1e3f6b6e LT |
286 | } |
287 | ||
19c58fb8 | 288 | static int gitdiff_oldname(const char *line, struct patch *patch) |
a4acb0eb | 289 | { |
19c58fb8 | 290 | patch->old_name = gitdiff_verify_name(line, patch->is_new, patch->old_name, "old"); |
a4acb0eb LT |
291 | return 0; |
292 | } | |
293 | ||
19c58fb8 | 294 | static int gitdiff_newname(const char *line, struct patch *patch) |
a4acb0eb | 295 | { |
19c58fb8 | 296 | patch->new_name = gitdiff_verify_name(line, patch->is_delete, patch->new_name, "new"); |
a4acb0eb LT |
297 | return 0; |
298 | } | |
299 | ||
19c58fb8 | 300 | static int gitdiff_oldmode(const char *line, struct patch *patch) |
a4acb0eb | 301 | { |
19c58fb8 | 302 | patch->old_mode = strtoul(line, NULL, 8); |
a4acb0eb LT |
303 | return 0; |
304 | } | |
305 | ||
19c58fb8 | 306 | static int gitdiff_newmode(const char *line, struct patch *patch) |
a4acb0eb | 307 | { |
19c58fb8 | 308 | patch->new_mode = strtoul(line, NULL, 8); |
a4acb0eb LT |
309 | return 0; |
310 | } | |
311 | ||
19c58fb8 | 312 | static int gitdiff_delete(const char *line, struct patch *patch) |
a4acb0eb | 313 | { |
19c58fb8 | 314 | patch->is_delete = 1; |
5041aa70 | 315 | patch->old_name = patch->def_name; |
19c58fb8 | 316 | return gitdiff_oldmode(line, patch); |
a4acb0eb LT |
317 | } |
318 | ||
19c58fb8 | 319 | static int gitdiff_newfile(const char *line, struct patch *patch) |
a4acb0eb | 320 | { |
19c58fb8 | 321 | patch->is_new = 1; |
5041aa70 | 322 | patch->new_name = patch->def_name; |
19c58fb8 | 323 | return gitdiff_newmode(line, patch); |
a4acb0eb LT |
324 | } |
325 | ||
19c58fb8 | 326 | static int gitdiff_copysrc(const char *line, struct patch *patch) |
a4acb0eb | 327 | { |
19c58fb8 LT |
328 | patch->is_copy = 1; |
329 | patch->old_name = find_name(line, NULL, 0, 0); | |
a4acb0eb LT |
330 | return 0; |
331 | } | |
332 | ||
19c58fb8 | 333 | static int gitdiff_copydst(const char *line, struct patch *patch) |
a4acb0eb | 334 | { |
19c58fb8 LT |
335 | patch->is_copy = 1; |
336 | patch->new_name = find_name(line, NULL, 0, 0); | |
a4acb0eb LT |
337 | return 0; |
338 | } | |
339 | ||
19c58fb8 | 340 | static int gitdiff_renamesrc(const char *line, struct patch *patch) |
a4acb0eb | 341 | { |
19c58fb8 LT |
342 | patch->is_rename = 1; |
343 | patch->old_name = find_name(line, NULL, 0, 0); | |
a4acb0eb LT |
344 | return 0; |
345 | } | |
346 | ||
19c58fb8 | 347 | static int gitdiff_renamedst(const char *line, struct patch *patch) |
a4acb0eb | 348 | { |
19c58fb8 LT |
349 | patch->is_rename = 1; |
350 | patch->new_name = find_name(line, NULL, 0, 0); | |
a4acb0eb LT |
351 | return 0; |
352 | } | |
353 | ||
19c58fb8 | 354 | static int gitdiff_similarity(const char *line, struct patch *patch) |
a4acb0eb | 355 | { |
96c912a4 JH |
356 | if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX) |
357 | patch->score = 0; | |
a4acb0eb | 358 | return 0; |
c1bb9350 LT |
359 | } |
360 | ||
70aadac0 JH |
361 | static int gitdiff_dissimilarity(const char *line, struct patch *patch) |
362 | { | |
96c912a4 JH |
363 | if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX) |
364 | patch->score = 0; | |
70aadac0 JH |
365 | return 0; |
366 | } | |
367 | ||
2cf67f1e JH |
368 | static int gitdiff_index(const char *line, struct patch *patch) |
369 | { | |
370 | /* index line is N hexadecimal, "..", N hexadecimal, | |
371 | * and optional space with octal mode. | |
372 | */ | |
373 | const char *ptr, *eol; | |
374 | int len; | |
375 | ||
376 | ptr = strchr(line, '.'); | |
9add69b1 | 377 | if (!ptr || ptr[1] != '.' || 40 < ptr - line) |
2cf67f1e JH |
378 | return 0; |
379 | len = ptr - line; | |
380 | memcpy(patch->old_sha1_prefix, line, len); | |
381 | patch->old_sha1_prefix[len] = 0; | |
382 | ||
383 | line = ptr + 2; | |
384 | ptr = strchr(line, ' '); | |
385 | eol = strchr(line, '\n'); | |
386 | ||
387 | if (!ptr || eol < ptr) | |
388 | ptr = eol; | |
389 | len = ptr - line; | |
390 | ||
9add69b1 | 391 | if (40 < len) |
2cf67f1e JH |
392 | return 0; |
393 | memcpy(patch->new_sha1_prefix, line, len); | |
394 | patch->new_sha1_prefix[len] = 0; | |
395 | if (*ptr == ' ') | |
396 | patch->new_mode = patch->old_mode = strtoul(ptr+1, NULL, 8); | |
397 | return 0; | |
398 | } | |
399 | ||
9a4a100e LT |
400 | /* |
401 | * This is normal for a diff that doesn't change anything: we'll fall through | |
402 | * into the next diff. Tell the parser to break out. | |
403 | */ | |
19c58fb8 | 404 | static int gitdiff_unrecognized(const char *line, struct patch *patch) |
9a4a100e LT |
405 | { |
406 | return -1; | |
407 | } | |
408 | ||
22943f1a JH |
409 | static const char *stop_at_slash(const char *line, int llen) |
410 | { | |
411 | int i; | |
412 | ||
413 | for (i = 0; i < llen; i++) { | |
414 | int ch = line[i]; | |
415 | if (ch == '/') | |
416 | return line + i; | |
417 | } | |
418 | return NULL; | |
419 | } | |
420 | ||
421 | /* This is to extract the same name that appears on "diff --git" | |
422 | * line. We do not find and return anything if it is a rename | |
423 | * patch, and it is OK because we will find the name elsewhere. | |
424 | * We need to reliably find name only when it is mode-change only, | |
425 | * creation or deletion of an empty file. In any of these cases, | |
426 | * both sides are the same name under a/ and b/ respectively. | |
427 | */ | |
428 | static char *git_header_name(char *line, int llen) | |
5041aa70 LT |
429 | { |
430 | int len; | |
22943f1a JH |
431 | const char *name; |
432 | const char *second = NULL; | |
5041aa70 | 433 | |
22943f1a JH |
434 | line += strlen("diff --git "); |
435 | llen -= strlen("diff --git "); | |
436 | ||
437 | if (*line == '"') { | |
438 | const char *cp; | |
439 | char *first = unquote_c_style(line, &second); | |
440 | if (!first) | |
5041aa70 | 441 | return NULL; |
22943f1a JH |
442 | |
443 | /* advance to the first slash */ | |
444 | cp = stop_at_slash(first, strlen(first)); | |
445 | if (!cp || cp == first) { | |
446 | /* we do not accept absolute paths */ | |
447 | free_first_and_fail: | |
448 | free(first); | |
449 | return NULL; | |
450 | } | |
451 | len = strlen(cp+1); | |
452 | memmove(first, cp+1, len+1); /* including NUL */ | |
453 | ||
454 | /* second points at one past closing dq of name. | |
455 | * find the second name. | |
456 | */ | |
457 | while ((second < line + llen) && isspace(*second)) | |
458 | second++; | |
459 | ||
460 | if (line + llen <= second) | |
461 | goto free_first_and_fail; | |
462 | if (*second == '"') { | |
463 | char *sp = unquote_c_style(second, NULL); | |
464 | if (!sp) | |
465 | goto free_first_and_fail; | |
466 | cp = stop_at_slash(sp, strlen(sp)); | |
467 | if (!cp || cp == sp) { | |
468 | free_both_and_fail: | |
469 | free(sp); | |
470 | goto free_first_and_fail; | |
471 | } | |
472 | /* They must match, otherwise ignore */ | |
473 | if (strcmp(cp+1, first)) | |
474 | goto free_both_and_fail; | |
475 | free(sp); | |
476 | return first; | |
477 | } | |
478 | ||
479 | /* unquoted second */ | |
480 | cp = stop_at_slash(second, line + llen - second); | |
481 | if (!cp || cp == second) | |
482 | goto free_first_and_fail; | |
483 | cp++; | |
484 | if (line + llen - cp != len + 1 || | |
485 | memcmp(first, cp, len)) | |
486 | goto free_first_and_fail; | |
487 | return first; | |
5041aa70 LT |
488 | } |
489 | ||
22943f1a JH |
490 | /* unquoted first name */ |
491 | name = stop_at_slash(line, llen); | |
492 | if (!name || name == line) | |
5041aa70 LT |
493 | return NULL; |
494 | ||
22943f1a JH |
495 | name++; |
496 | ||
497 | /* since the first name is unquoted, a dq if exists must be | |
498 | * the beginning of the second name. | |
499 | */ | |
500 | for (second = name; second < line + llen; second++) { | |
501 | if (*second == '"') { | |
502 | const char *cp = second; | |
503 | const char *np; | |
504 | char *sp = unquote_c_style(second, NULL); | |
505 | ||
506 | if (!sp) | |
507 | return NULL; | |
508 | np = stop_at_slash(sp, strlen(sp)); | |
509 | if (!np || np == sp) { | |
510 | free_second_and_fail: | |
511 | free(sp); | |
512 | return NULL; | |
513 | } | |
514 | np++; | |
515 | len = strlen(np); | |
516 | if (len < cp - name && | |
517 | !strncmp(np, name, len) && | |
518 | isspace(name[len])) { | |
519 | /* Good */ | |
520 | memmove(sp, np, len + 1); | |
521 | return sp; | |
522 | } | |
523 | goto free_second_and_fail; | |
524 | } | |
525 | } | |
526 | ||
5041aa70 LT |
527 | /* |
528 | * Accept a name only if it shows up twice, exactly the same | |
529 | * form. | |
530 | */ | |
531 | for (len = 0 ; ; len++) { | |
532 | char c = name[len]; | |
533 | ||
534 | switch (c) { | |
535 | default: | |
536 | continue; | |
537 | case '\n': | |
e70a165d | 538 | return NULL; |
5041aa70 LT |
539 | case '\t': case ' ': |
540 | second = name+len; | |
541 | for (;;) { | |
542 | char c = *second++; | |
543 | if (c == '\n') | |
544 | return NULL; | |
545 | if (c == '/') | |
546 | break; | |
547 | } | |
0e87e048 | 548 | if (second[len] == '\n' && !memcmp(name, second, len)) { |
5041aa70 LT |
549 | char *ret = xmalloc(len + 1); |
550 | memcpy(ret, name, len); | |
551 | ret[len] = 0; | |
552 | return ret; | |
553 | } | |
554 | } | |
555 | } | |
556 | return NULL; | |
557 | } | |
558 | ||
c1bb9350 | 559 | /* Verify that we recognize the lines following a git header */ |
19c58fb8 | 560 | static int parse_git_header(char *line, int len, unsigned int size, struct patch *patch) |
c1bb9350 | 561 | { |
a4acb0eb LT |
562 | unsigned long offset; |
563 | ||
564 | /* A git diff has explicit new/delete information, so we don't guess */ | |
19c58fb8 LT |
565 | patch->is_new = 0; |
566 | patch->is_delete = 0; | |
a4acb0eb | 567 | |
5041aa70 LT |
568 | /* |
569 | * Some things may not have the old name in the | |
570 | * rest of the headers anywhere (pure mode changes, | |
571 | * or removing or adding empty files), so we get | |
572 | * the default name from the header. | |
573 | */ | |
22943f1a | 574 | patch->def_name = git_header_name(line, len); |
5041aa70 | 575 | |
a4acb0eb LT |
576 | line += len; |
577 | size -= len; | |
578 | linenr++; | |
579 | for (offset = len ; size > 0 ; offset += len, size -= len, line += len, linenr++) { | |
580 | static const struct opentry { | |
581 | const char *str; | |
19c58fb8 | 582 | int (*fn)(const char *, struct patch *); |
a4acb0eb LT |
583 | } optable[] = { |
584 | { "@@ -", gitdiff_hdrend }, | |
585 | { "--- ", gitdiff_oldname }, | |
586 | { "+++ ", gitdiff_newname }, | |
587 | { "old mode ", gitdiff_oldmode }, | |
588 | { "new mode ", gitdiff_newmode }, | |
589 | { "deleted file mode ", gitdiff_delete }, | |
590 | { "new file mode ", gitdiff_newfile }, | |
591 | { "copy from ", gitdiff_copysrc }, | |
592 | { "copy to ", gitdiff_copydst }, | |
33f4d087 LT |
593 | { "rename old ", gitdiff_renamesrc }, |
594 | { "rename new ", gitdiff_renamedst }, | |
dc938417 LT |
595 | { "rename from ", gitdiff_renamesrc }, |
596 | { "rename to ", gitdiff_renamedst }, | |
a4acb0eb | 597 | { "similarity index ", gitdiff_similarity }, |
70aadac0 | 598 | { "dissimilarity index ", gitdiff_dissimilarity }, |
2cf67f1e | 599 | { "index ", gitdiff_index }, |
9a4a100e | 600 | { "", gitdiff_unrecognized }, |
a4acb0eb LT |
601 | }; |
602 | int i; | |
c1bb9350 | 603 | |
c1bb9350 | 604 | len = linelen(line, size); |
a4acb0eb | 605 | if (!len || line[len-1] != '\n') |
c1bb9350 | 606 | break; |
a4acb0eb LT |
607 | for (i = 0; i < sizeof(optable) / sizeof(optable[0]); i++) { |
608 | const struct opentry *p = optable + i; | |
609 | int oplen = strlen(p->str); | |
610 | if (len < oplen || memcmp(p->str, line, oplen)) | |
611 | continue; | |
19c58fb8 | 612 | if (p->fn(line + oplen, patch) < 0) |
a4acb0eb | 613 | return offset; |
9a4a100e | 614 | break; |
a4acb0eb | 615 | } |
c1bb9350 LT |
616 | } |
617 | ||
a4acb0eb | 618 | return offset; |
c1bb9350 LT |
619 | } |
620 | ||
fab2c257 | 621 | static int parse_num(const char *line, unsigned long *p) |
46979f56 LT |
622 | { |
623 | char *ptr; | |
fab2c257 LT |
624 | |
625 | if (!isdigit(*line)) | |
626 | return 0; | |
627 | *p = strtoul(line, &ptr, 10); | |
628 | return ptr - line; | |
629 | } | |
630 | ||
631 | static int parse_range(const char *line, int len, int offset, const char *expect, | |
632 | unsigned long *p1, unsigned long *p2) | |
633 | { | |
46979f56 LT |
634 | int digits, ex; |
635 | ||
636 | if (offset < 0 || offset >= len) | |
637 | return -1; | |
638 | line += offset; | |
639 | len -= offset; | |
640 | ||
fab2c257 LT |
641 | digits = parse_num(line, p1); |
642 | if (!digits) | |
46979f56 | 643 | return -1; |
46979f56 LT |
644 | |
645 | offset += digits; | |
646 | line += digits; | |
647 | len -= digits; | |
648 | ||
fab2c257 LT |
649 | *p2 = *p1; |
650 | if (*line == ',') { | |
651 | digits = parse_num(line+1, p2); | |
652 | if (!digits) | |
653 | return -1; | |
654 | ||
655 | offset += digits+1; | |
656 | line += digits+1; | |
657 | len -= digits+1; | |
658 | } | |
659 | ||
46979f56 LT |
660 | ex = strlen(expect); |
661 | if (ex > len) | |
662 | return -1; | |
663 | if (memcmp(line, expect, ex)) | |
664 | return -1; | |
665 | ||
666 | return offset + ex; | |
667 | } | |
668 | ||
669 | /* | |
670 | * Parse a unified diff fragment header of the | |
671 | * form "@@ -a,b +c,d @@" | |
672 | */ | |
19c58fb8 | 673 | static int parse_fragment_header(char *line, int len, struct fragment *fragment) |
46979f56 LT |
674 | { |
675 | int offset; | |
676 | ||
677 | if (!len || line[len-1] != '\n') | |
678 | return -1; | |
679 | ||
680 | /* Figure out the number of lines in a fragment */ | |
fab2c257 LT |
681 | offset = parse_range(line, len, 4, " +", &fragment->oldpos, &fragment->oldlines); |
682 | offset = parse_range(line, len, offset, " @@", &fragment->newpos, &fragment->newlines); | |
46979f56 LT |
683 | |
684 | return offset; | |
685 | } | |
686 | ||
19c58fb8 | 687 | static int find_header(char *line, unsigned long size, int *hdrsize, struct patch *patch) |
c1bb9350 LT |
688 | { |
689 | unsigned long offset, len; | |
690 | ||
19c58fb8 LT |
691 | patch->is_rename = patch->is_copy = 0; |
692 | patch->is_new = patch->is_delete = -1; | |
693 | patch->old_mode = patch->new_mode = 0; | |
694 | patch->old_name = patch->new_name = NULL; | |
46979f56 | 695 | for (offset = 0; size > 0; offset += len, size -= len, line += len, linenr++) { |
c1bb9350 LT |
696 | unsigned long nextlen; |
697 | ||
698 | len = linelen(line, size); | |
699 | if (!len) | |
700 | break; | |
701 | ||
702 | /* Testing this early allows us to take a few shortcuts.. */ | |
703 | if (len < 6) | |
704 | continue; | |
46979f56 LT |
705 | |
706 | /* | |
707 | * Make sure we don't find any unconnected patch fragmants. | |
708 | * That's a sign that we didn't find a header, and that a | |
709 | * patch has become corrupted/broken up. | |
710 | */ | |
711 | if (!memcmp("@@ -", line, 4)) { | |
19c58fb8 LT |
712 | struct fragment dummy; |
713 | if (parse_fragment_header(line, len, &dummy) < 0) | |
46979f56 | 714 | continue; |
4ec99bf0 | 715 | error("patch fragment without header at line %d: %.*s", linenr, (int)len-1, line); |
46979f56 LT |
716 | } |
717 | ||
c1bb9350 LT |
718 | if (size < len + 6) |
719 | break; | |
720 | ||
721 | /* | |
722 | * Git patch? It might not have a real patch, just a rename | |
723 | * or mode change, so we handle that specially | |
724 | */ | |
725 | if (!memcmp("diff --git ", line, 11)) { | |
19c58fb8 | 726 | int git_hdr_len = parse_git_header(line, len, size, patch); |
206de27e | 727 | if (git_hdr_len <= len) |
c1bb9350 | 728 | continue; |
b7e8039a LT |
729 | if (!patch->old_name && !patch->new_name) { |
730 | if (!patch->def_name) | |
731 | die("git diff header lacks filename information (line %d)", linenr); | |
732 | patch->old_name = patch->new_name = patch->def_name; | |
733 | } | |
a4acb0eb | 734 | *hdrsize = git_hdr_len; |
c1bb9350 LT |
735 | return offset; |
736 | } | |
737 | ||
738 | /** --- followed by +++ ? */ | |
739 | if (memcmp("--- ", line, 4) || memcmp("+++ ", line + len, 4)) | |
740 | continue; | |
741 | ||
742 | /* | |
743 | * We only accept unified patches, so we want it to | |
744 | * at least have "@@ -a,b +c,d @@\n", which is 14 chars | |
745 | * minimum | |
746 | */ | |
747 | nextlen = linelen(line + len, size - len); | |
748 | if (size < nextlen + 14 || memcmp("@@ -", line + len + nextlen, 4)) | |
749 | continue; | |
750 | ||
751 | /* Ok, we'll consider it a patch */ | |
19c58fb8 | 752 | parse_traditional_patch(line, line+len, patch); |
c1bb9350 | 753 | *hdrsize = len + nextlen; |
46979f56 | 754 | linenr += 2; |
c1bb9350 LT |
755 | return offset; |
756 | } | |
757 | return -1; | |
758 | } | |
759 | ||
c1bb9350 LT |
760 | /* |
761 | * Parse a unified diff. Note that this really needs | |
762 | * to parse each fragment separately, since the only | |
763 | * way to know the difference between a "---" that is | |
764 | * part of a patch, and a "---" that starts the next | |
765 | * patch is to look at the line counts.. | |
766 | */ | |
19c58fb8 | 767 | static int parse_fragment(char *line, unsigned long size, struct patch *patch, struct fragment *fragment) |
c1bb9350 | 768 | { |
3f40315a | 769 | int added, deleted; |
c1bb9350 | 770 | int len = linelen(line, size), offset; |
30996652 | 771 | unsigned long oldlines, newlines; |
c1bb9350 | 772 | |
19c58fb8 | 773 | offset = parse_fragment_header(line, len, fragment); |
c1bb9350 LT |
774 | if (offset < 0) |
775 | return -1; | |
19c58fb8 LT |
776 | oldlines = fragment->oldlines; |
777 | newlines = fragment->newlines; | |
c1bb9350 | 778 | |
30996652 LT |
779 | if (patch->is_new < 0) { |
780 | patch->is_new = !oldlines; | |
781 | if (!oldlines) | |
782 | patch->old_name = NULL; | |
783 | } | |
784 | if (patch->is_delete < 0) { | |
785 | patch->is_delete = !newlines; | |
786 | if (!newlines) | |
787 | patch->new_name = NULL; | |
788 | } | |
789 | ||
790 | if (patch->is_new != !oldlines) | |
791 | return error("new file depends on old contents"); | |
af3f929f LT |
792 | if (patch->is_delete != !newlines) { |
793 | if (newlines) | |
794 | return error("deleted file still has contents"); | |
795 | fprintf(stderr, "** warning: file %s becomes empty but is not deleted\n", patch->new_name); | |
796 | } | |
a4acb0eb | 797 | |
c1bb9350 LT |
798 | /* Parse the thing.. */ |
799 | line += len; | |
800 | size -= len; | |
46979f56 | 801 | linenr++; |
3f40315a | 802 | added = deleted = 0; |
46979f56 | 803 | for (offset = len; size > 0; offset += len, size -= len, line += len, linenr++) { |
c1bb9350 LT |
804 | if (!oldlines && !newlines) |
805 | break; | |
806 | len = linelen(line, size); | |
807 | if (!len || line[len-1] != '\n') | |
808 | return -1; | |
809 | switch (*line) { | |
810 | default: | |
811 | return -1; | |
812 | case ' ': | |
813 | oldlines--; | |
814 | newlines--; | |
815 | break; | |
816 | case '-': | |
3f40315a | 817 | deleted++; |
c1bb9350 LT |
818 | oldlines--; |
819 | break; | |
820 | case '+': | |
3f40315a | 821 | added++; |
c1bb9350 LT |
822 | newlines--; |
823 | break; | |
433ef8a2 FK |
824 | |
825 | /* We allow "\ No newline at end of file". Depending | |
826 | * on locale settings when the patch was produced we | |
827 | * don't know what this line looks like. The only | |
56d33b11 JH |
828 | * thing we do know is that it begins with "\ ". |
829 | * Checking for 12 is just for sanity check -- any | |
830 | * l10n of "\ No newline..." is at least that long. | |
831 | */ | |
fab2c257 | 832 | case '\\': |
433ef8a2 | 833 | if (len < 12 || memcmp(line, "\\ ", 2)) |
3cca928d | 834 | return -1; |
fab2c257 | 835 | break; |
c1bb9350 LT |
836 | } |
837 | } | |
8b64647d JH |
838 | /* If a fragment ends with an incomplete line, we failed to include |
839 | * it in the above loop because we hit oldlines == newlines == 0 | |
840 | * before seeing it. | |
841 | */ | |
433ef8a2 | 842 | if (12 < size && !memcmp(line, "\\ ", 2)) |
8b64647d JH |
843 | offset += linelen(line, size); |
844 | ||
3f40315a LT |
845 | patch->lines_added += added; |
846 | patch->lines_deleted += deleted; | |
c1bb9350 LT |
847 | return offset; |
848 | } | |
849 | ||
19c58fb8 | 850 | static int parse_single_patch(char *line, unsigned long size, struct patch *patch) |
c1bb9350 LT |
851 | { |
852 | unsigned long offset = 0; | |
19c58fb8 | 853 | struct fragment **fragp = &patch->fragments; |
c1bb9350 LT |
854 | |
855 | while (size > 4 && !memcmp(line, "@@ -", 4)) { | |
19c58fb8 LT |
856 | struct fragment *fragment; |
857 | int len; | |
858 | ||
859 | fragment = xmalloc(sizeof(*fragment)); | |
860 | memset(fragment, 0, sizeof(*fragment)); | |
861 | len = parse_fragment(line, size, patch, fragment); | |
c1bb9350 | 862 | if (len <= 0) |
46979f56 | 863 | die("corrupt patch at line %d", linenr); |
c1bb9350 | 864 | |
19c58fb8 LT |
865 | fragment->patch = line; |
866 | fragment->size = len; | |
867 | ||
868 | *fragp = fragment; | |
869 | fragp = &fragment->next; | |
c1bb9350 LT |
870 | |
871 | offset += len; | |
872 | line += len; | |
873 | size -= len; | |
874 | } | |
875 | return offset; | |
876 | } | |
877 | ||
1fea629f LT |
878 | static inline int metadata_changes(struct patch *patch) |
879 | { | |
880 | return patch->is_rename > 0 || | |
881 | patch->is_copy > 0 || | |
882 | patch->is_new > 0 || | |
883 | patch->is_delete || | |
884 | (patch->old_mode && patch->new_mode && | |
885 | patch->old_mode != patch->new_mode); | |
886 | } | |
887 | ||
19c58fb8 | 888 | static int parse_chunk(char *buffer, unsigned long size, struct patch *patch) |
c1bb9350 LT |
889 | { |
890 | int hdrsize, patchsize; | |
19c58fb8 | 891 | int offset = find_header(buffer, size, &hdrsize, patch); |
c1bb9350 LT |
892 | |
893 | if (offset < 0) | |
894 | return offset; | |
c1bb9350 | 895 | |
19c58fb8 | 896 | patchsize = parse_single_patch(buffer + offset + hdrsize, size - offset - hdrsize, patch); |
c1bb9350 | 897 | |
92927ed0 | 898 | if (!patchsize) { |
3200d1ae JH |
899 | static const char *binhdr[] = { |
900 | "Binary files ", | |
901 | "Files ", | |
902 | NULL, | |
903 | }; | |
904 | int i; | |
905 | int hd = hdrsize + offset; | |
906 | unsigned long llen = linelen(buffer + hd, size - hd); | |
907 | ||
908 | if (!memcmp(" differ\n", buffer + hd + llen - 8, 8)) | |
909 | for (i = 0; binhdr[i]; i++) { | |
910 | int len = strlen(binhdr[i]); | |
911 | if (len < size - hd && | |
912 | !memcmp(binhdr[i], buffer + hd, len)) { | |
913 | patch->is_binary = 1; | |
914 | break; | |
915 | } | |
916 | } | |
ff36de08 | 917 | |
92927ed0 | 918 | /* Empty patch cannot be applied if: |
011f4274 JH |
919 | * - it is a binary patch and we do not do binary_replace, or |
920 | * - text patch without metadata change | |
92927ed0 JH |
921 | */ |
922 | if ((apply || check) && | |
011f4274 JH |
923 | (patch->is_binary |
924 | ? !allow_binary_replacement | |
925 | : !metadata_changes(patch))) | |
ff36de08 JH |
926 | die("patch with only garbage at line %d", linenr); |
927 | } | |
1fea629f | 928 | |
c1bb9350 LT |
929 | return offset + hdrsize + patchsize; |
930 | } | |
931 | ||
6da4016a LT |
932 | static const char pluses[] = "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"; |
933 | static const char minuses[]= "----------------------------------------------------------------------"; | |
3f40315a LT |
934 | |
935 | static void show_stats(struct patch *patch) | |
936 | { | |
62917097 | 937 | const char *prefix = ""; |
03b4538b | 938 | char *name = patch->new_name; |
22943f1a | 939 | char *qname = NULL; |
95bedc9e | 940 | int len, max, add, del, total; |
3f40315a | 941 | |
5041aa70 | 942 | if (!name) |
03b4538b | 943 | name = patch->old_name; |
3f40315a | 944 | |
22943f1a JH |
945 | if (0 < (len = quote_c_style(name, NULL, NULL, 0))) { |
946 | qname = xmalloc(len + 1); | |
947 | quote_c_style(name, qname, NULL, 0); | |
948 | name = qname; | |
949 | } | |
950 | ||
3f40315a LT |
951 | /* |
952 | * "scale" the filename | |
953 | */ | |
954 | len = strlen(name); | |
955 | max = max_len; | |
956 | if (max > 50) | |
957 | max = 50; | |
62917097 LT |
958 | if (len > max) { |
959 | char *slash; | |
960 | prefix = "..."; | |
961 | max -= 3; | |
3f40315a | 962 | name += len - max; |
62917097 LT |
963 | slash = strchr(name, '/'); |
964 | if (slash) | |
965 | name = slash; | |
966 | } | |
3f40315a LT |
967 | len = max; |
968 | ||
969 | /* | |
970 | * scale the add/delete | |
971 | */ | |
972 | max = max_change; | |
973 | if (max + len > 70) | |
974 | max = 70 - len; | |
95bedc9e LT |
975 | |
976 | add = patch->lines_added; | |
977 | del = patch->lines_deleted; | |
978 | total = add + del; | |
979 | ||
69f956e1 SV |
980 | if (max_change > 0) { |
981 | total = (total * max + max_change / 2) / max_change; | |
982 | add = (add * max + max_change / 2) / max_change; | |
983 | del = total - add; | |
984 | } | |
ff36de08 JH |
985 | if (patch->is_binary) |
986 | printf(" %s%-*s | Bin\n", prefix, len, name); | |
987 | else | |
988 | printf(" %s%-*s |%5d %.*s%.*s\n", prefix, | |
989 | len, name, patch->lines_added + patch->lines_deleted, | |
990 | add, pluses, del, minuses); | |
22943f1a JH |
991 | if (qname) |
992 | free(qname); | |
3f40315a LT |
993 | } |
994 | ||
3cca928d LT |
995 | static int read_old_data(struct stat *st, const char *path, void *buf, unsigned long size) |
996 | { | |
997 | int fd; | |
998 | unsigned long got; | |
999 | ||
1000 | switch (st->st_mode & S_IFMT) { | |
1001 | case S_IFLNK: | |
1002 | return readlink(path, buf, size); | |
1003 | case S_IFREG: | |
1004 | fd = open(path, O_RDONLY); | |
1005 | if (fd < 0) | |
1006 | return error("unable to open %s", path); | |
1007 | got = 0; | |
1008 | for (;;) { | |
1009 | int ret = read(fd, buf + got, size - got); | |
1010 | if (ret < 0) { | |
1011 | if (errno == EAGAIN) | |
1012 | continue; | |
1013 | break; | |
1014 | } | |
1015 | if (!ret) | |
1016 | break; | |
1017 | got += ret; | |
1018 | } | |
1019 | close(fd); | |
1020 | return got; | |
1021 | ||
1022 | default: | |
1023 | return -1; | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | static int find_offset(const char *buf, unsigned long size, const char *fragment, unsigned long fragsize, int line) | |
1028 | { | |
6e7c92a9 LT |
1029 | int i; |
1030 | unsigned long start, backwards, forwards; | |
3cca928d LT |
1031 | |
1032 | if (fragsize > size) | |
1033 | return -1; | |
1034 | ||
1035 | start = 0; | |
1036 | if (line > 1) { | |
3cca928d | 1037 | unsigned long offset = 0; |
6e7c92a9 LT |
1038 | i = line-1; |
1039 | while (offset + fragsize <= size) { | |
3cca928d LT |
1040 | if (buf[offset++] == '\n') { |
1041 | start = offset; | |
6e7c92a9 | 1042 | if (!--i) |
3cca928d LT |
1043 | break; |
1044 | } | |
1045 | } | |
1046 | } | |
1047 | ||
1048 | /* Exact line number? */ | |
1049 | if (!memcmp(buf + start, fragment, fragsize)) | |
1050 | return start; | |
1051 | ||
6e7c92a9 LT |
1052 | /* |
1053 | * There's probably some smart way to do this, but I'll leave | |
1054 | * that to the smart and beautiful people. I'm simple and stupid. | |
1055 | */ | |
1056 | backwards = start; | |
1057 | forwards = start; | |
1058 | for (i = 0; ; i++) { | |
1059 | unsigned long try; | |
1060 | int n; | |
1061 | ||
1062 | /* "backward" */ | |
1063 | if (i & 1) { | |
1064 | if (!backwards) { | |
1065 | if (forwards + fragsize > size) | |
1066 | break; | |
1067 | continue; | |
1068 | } | |
1069 | do { | |
1070 | --backwards; | |
1071 | } while (backwards && buf[backwards-1] != '\n'); | |
1072 | try = backwards; | |
1073 | } else { | |
1074 | while (forwards + fragsize <= size) { | |
1075 | if (buf[forwards++] == '\n') | |
1076 | break; | |
1077 | } | |
1078 | try = forwards; | |
1079 | } | |
1080 | ||
1081 | if (try + fragsize > size) | |
1082 | continue; | |
1083 | if (memcmp(buf + try, fragment, fragsize)) | |
1084 | continue; | |
1085 | n = (i >> 1)+1; | |
1086 | if (i & 1) | |
1087 | n = -n; | |
6e7c92a9 LT |
1088 | return try; |
1089 | } | |
1090 | ||
3cca928d LT |
1091 | /* |
1092 | * We should start searching forward and backward. | |
1093 | */ | |
1094 | return -1; | |
1095 | } | |
1096 | ||
6e7c92a9 LT |
1097 | struct buffer_desc { |
1098 | char *buffer; | |
1099 | unsigned long size; | |
1100 | unsigned long alloc; | |
1101 | }; | |
1102 | ||
1103 | static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag) | |
3cca928d | 1104 | { |
6e7c92a9 | 1105 | char *buf = desc->buffer; |
3cca928d LT |
1106 | const char *patch = frag->patch; |
1107 | int offset, size = frag->size; | |
1108 | char *old = xmalloc(size); | |
1109 | char *new = xmalloc(size); | |
1110 | int oldsize = 0, newsize = 0; | |
1111 | ||
1112 | while (size > 0) { | |
1113 | int len = linelen(patch, size); | |
1114 | int plen; | |
1115 | ||
1116 | if (!len) | |
1117 | break; | |
1118 | ||
1119 | /* | |
1120 | * "plen" is how much of the line we should use for | |
1121 | * the actual patch data. Normally we just remove the | |
1122 | * first character on the line, but if the line is | |
1123 | * followed by "\ No newline", then we also remove the | |
1124 | * last one (which is the newline, of course). | |
1125 | */ | |
1126 | plen = len-1; | |
8b64647d | 1127 | if (len < size && patch[len] == '\\') |
3cca928d LT |
1128 | plen--; |
1129 | switch (*patch) { | |
1130 | case ' ': | |
1131 | case '-': | |
1132 | memcpy(old + oldsize, patch + 1, plen); | |
1133 | oldsize += plen; | |
1134 | if (*patch == '-') | |
1135 | break; | |
1136 | /* Fall-through for ' ' */ | |
1137 | case '+': | |
cb93c193 JH |
1138 | if (*patch != '+' || !no_add) { |
1139 | memcpy(new + newsize, patch + 1, plen); | |
1140 | newsize += plen; | |
1141 | } | |
3cca928d LT |
1142 | break; |
1143 | case '@': case '\\': | |
1144 | /* Ignore it, we already handled it */ | |
1145 | break; | |
1146 | default: | |
1147 | return -1; | |
1148 | } | |
1149 | patch += len; | |
1150 | size -= len; | |
1151 | } | |
1152 | ||
6e7c92a9 | 1153 | offset = find_offset(buf, desc->size, old, oldsize, frag->newpos); |
3cca928d | 1154 | if (offset >= 0) { |
6e7c92a9 LT |
1155 | int diff = newsize - oldsize; |
1156 | unsigned long size = desc->size + diff; | |
1157 | unsigned long alloc = desc->alloc; | |
1158 | ||
1159 | if (size > alloc) { | |
1160 | alloc = size + 8192; | |
1161 | desc->alloc = alloc; | |
1162 | buf = xrealloc(buf, alloc); | |
1163 | desc->buffer = buf; | |
1164 | } | |
1165 | desc->size = size; | |
1166 | memmove(buf + offset + newsize, buf + offset + oldsize, size - offset - newsize); | |
1167 | memcpy(buf + offset, new, newsize); | |
3cca928d LT |
1168 | offset = 0; |
1169 | } | |
1170 | ||
1171 | free(old); | |
1172 | free(new); | |
1173 | return offset; | |
1174 | } | |
1175 | ||
6e7c92a9 | 1176 | static int apply_fragments(struct buffer_desc *desc, struct patch *patch) |
3cca928d LT |
1177 | { |
1178 | struct fragment *frag = patch->fragments; | |
011f4274 JH |
1179 | const char *name = patch->old_name ? patch->old_name : patch->new_name; |
1180 | ||
1181 | if (patch->is_binary) { | |
1182 | unsigned char sha1[20]; | |
1183 | ||
1184 | if (!allow_binary_replacement) | |
1185 | return error("cannot apply binary patch to '%s' " | |
1186 | "without --allow-binary-replacement", | |
1187 | name); | |
1188 | ||
1189 | /* For safety, we require patch index line to contain | |
1190 | * full 40-byte textual SHA1 for old and new, at least for now. | |
1191 | */ | |
1192 | if (strlen(patch->old_sha1_prefix) != 40 || | |
1193 | strlen(patch->new_sha1_prefix) != 40 || | |
1194 | get_sha1_hex(patch->old_sha1_prefix, sha1) || | |
1195 | get_sha1_hex(patch->new_sha1_prefix, sha1)) | |
1196 | return error("cannot apply binary patch to '%s' " | |
1197 | "without full index line", name); | |
1198 | ||
1199 | if (patch->old_name) { | |
1200 | unsigned char hdr[50]; | |
1201 | int hdrlen; | |
1202 | ||
1203 | /* See if the old one matches what the patch | |
1204 | * applies to. | |
1205 | */ | |
1206 | write_sha1_file_prepare(desc->buffer, desc->size, | |
1207 | "blob", sha1, hdr, &hdrlen); | |
1208 | if (strcmp(sha1_to_hex(sha1), patch->old_sha1_prefix)) | |
1209 | return error("the patch applies to '%s' (%s), " | |
1210 | "which does not match the " | |
1211 | "current contents.", | |
1212 | name, sha1_to_hex(sha1)); | |
1213 | } | |
1214 | else { | |
1215 | /* Otherwise, the old one must be empty. */ | |
1216 | if (desc->size) | |
1217 | return error("the patch applies to an empty " | |
1218 | "'%s' but it is not empty", name); | |
1219 | } | |
1220 | ||
1221 | /* For now, we do not record post-image data in the patch, | |
1222 | * and require the object already present in the recipient's | |
1223 | * object database. | |
1224 | */ | |
1225 | if (desc->buffer) { | |
1226 | free(desc->buffer); | |
1227 | desc->alloc = desc->size = 0; | |
1228 | } | |
1229 | get_sha1_hex(patch->new_sha1_prefix, sha1); | |
1230 | ||
1231 | if (memcmp(sha1, null_sha1, 20)) { | |
1232 | char type[10]; | |
1233 | unsigned long size; | |
1234 | ||
1235 | desc->buffer = read_sha1_file(sha1, type, &size); | |
1236 | if (!desc->buffer) | |
1237 | return error("the necessary postimage %s for " | |
1238 | "'%s' does not exist", | |
1239 | patch->new_sha1_prefix, name); | |
1240 | desc->alloc = desc->size = size; | |
1241 | } | |
1242 | ||
1243 | return 0; | |
1244 | } | |
3cca928d LT |
1245 | |
1246 | while (frag) { | |
6e7c92a9 | 1247 | if (apply_one_fragment(desc, frag) < 0) |
011f4274 JH |
1248 | return error("patch failed: %s:%ld", |
1249 | name, frag->oldpos); | |
3cca928d LT |
1250 | frag = frag->next; |
1251 | } | |
30996652 | 1252 | return 0; |
3cca928d LT |
1253 | } |
1254 | ||
1255 | static int apply_data(struct patch *patch, struct stat *st) | |
1256 | { | |
6e7c92a9 LT |
1257 | char *buf; |
1258 | unsigned long size, alloc; | |
1259 | struct buffer_desc desc; | |
3cca928d | 1260 | |
30996652 LT |
1261 | size = 0; |
1262 | alloc = 0; | |
1263 | buf = NULL; | |
1264 | if (patch->old_name) { | |
1265 | size = st->st_size; | |
1266 | alloc = size + 8192; | |
1267 | buf = xmalloc(alloc); | |
1268 | if (read_old_data(st, patch->old_name, buf, alloc) != size) | |
1269 | return error("read of %s failed", patch->old_name); | |
1270 | } | |
6e7c92a9 LT |
1271 | |
1272 | desc.size = size; | |
1273 | desc.alloc = alloc; | |
1274 | desc.buffer = buf; | |
1275 | if (apply_fragments(&desc, patch) < 0) | |
3cca928d | 1276 | return -1; |
6e7c92a9 LT |
1277 | patch->result = desc.buffer; |
1278 | patch->resultsize = desc.size; | |
5aa7d94c LT |
1279 | |
1280 | if (patch->is_delete && patch->resultsize) | |
1281 | return error("removal patch leaves file contents"); | |
1282 | ||
3cca928d LT |
1283 | return 0; |
1284 | } | |
1285 | ||
a577284a | 1286 | static int check_patch(struct patch *patch) |
fab2c257 | 1287 | { |
a577284a | 1288 | struct stat st; |
fab2c257 LT |
1289 | const char *old_name = patch->old_name; |
1290 | const char *new_name = patch->new_name; | |
011f4274 | 1291 | const char *name = old_name ? old_name : new_name; |
fab2c257 LT |
1292 | |
1293 | if (old_name) { | |
a577284a | 1294 | int changed; |
56d33b11 | 1295 | int stat_ret = lstat(old_name, &st); |
a577284a | 1296 | |
3cca928d LT |
1297 | if (check_index) { |
1298 | int pos = cache_name_pos(old_name, strlen(old_name)); | |
1299 | if (pos < 0) | |
56d33b11 JH |
1300 | return error("%s: does not exist in index", |
1301 | old_name); | |
1302 | if (stat_ret < 0) { | |
1303 | struct checkout costate; | |
1304 | if (errno != ENOENT) | |
1305 | return error("%s: %s", old_name, | |
1306 | strerror(errno)); | |
1307 | /* checkout */ | |
1308 | costate.base_dir = ""; | |
1309 | costate.base_dir_len = 0; | |
1310 | costate.force = 0; | |
1311 | costate.quiet = 0; | |
1312 | costate.not_new = 0; | |
1313 | costate.refresh_cache = 1; | |
1314 | if (checkout_entry(active_cache[pos], | |
1315 | &costate) || | |
1316 | lstat(old_name, &st)) | |
1317 | return -1; | |
1318 | } | |
1319 | ||
3cca928d LT |
1320 | changed = ce_match_stat(active_cache[pos], &st); |
1321 | if (changed) | |
56d33b11 JH |
1322 | return error("%s: does not match index", |
1323 | old_name); | |
3cca928d | 1324 | } |
56d33b11 JH |
1325 | else if (stat_ret < 0) |
1326 | return error("%s: %s", old_name, strerror(errno)); | |
1327 | ||
3cca928d LT |
1328 | if (patch->is_new < 0) |
1329 | patch->is_new = 0; | |
de4971b5 | 1330 | st.st_mode = ntohl(create_ce_mode(st.st_mode)); |
a577284a LT |
1331 | if (!patch->old_mode) |
1332 | patch->old_mode = st.st_mode; | |
3cca928d LT |
1333 | if ((st.st_mode ^ patch->old_mode) & S_IFMT) |
1334 | return error("%s: wrong type", old_name); | |
1335 | if (st.st_mode != patch->old_mode) | |
1336 | fprintf(stderr, "warning: %s has type %o, expected %o\n", | |
1337 | old_name, st.st_mode, patch->old_mode); | |
fab2c257 | 1338 | } |
a577284a | 1339 | |
fab2c257 | 1340 | if (new_name && (patch->is_new | patch->is_rename | patch->is_copy)) { |
3cca928d | 1341 | if (check_index && cache_name_pos(new_name, strlen(new_name)) >= 0) |
a577284a LT |
1342 | return error("%s: already exists in index", new_name); |
1343 | if (!lstat(new_name, &st)) | |
1344 | return error("%s: already exists in working directory", new_name); | |
1345 | if (errno != ENOENT) | |
1346 | return error("%s: %s", new_name, strerror(errno)); | |
35cc4bcd JS |
1347 | if (!patch->new_mode) { |
1348 | if (patch->is_new) | |
1349 | patch->new_mode = S_IFREG | 0644; | |
1350 | else | |
1351 | patch->new_mode = patch->old_mode; | |
1352 | } | |
fab2c257 | 1353 | } |
3cca928d LT |
1354 | |
1355 | if (new_name && old_name) { | |
1356 | int same = !strcmp(old_name, new_name); | |
1357 | if (!patch->new_mode) | |
1358 | patch->new_mode = patch->old_mode; | |
1359 | if ((patch->old_mode ^ patch->new_mode) & S_IFMT) | |
1360 | return error("new mode (%o) of %s does not match old mode (%o)%s%s", | |
1361 | patch->new_mode, new_name, patch->old_mode, | |
1362 | same ? "" : " of ", same ? "" : old_name); | |
1363 | } | |
1364 | ||
1365 | if (apply_data(patch, &st) < 0) | |
011f4274 | 1366 | return error("%s: patch does not apply", name); |
a577284a | 1367 | return 0; |
fab2c257 LT |
1368 | } |
1369 | ||
a577284a | 1370 | static int check_patch_list(struct patch *patch) |
19c58fb8 | 1371 | { |
a577284a LT |
1372 | int error = 0; |
1373 | ||
1374 | for (;patch ; patch = patch->next) | |
1375 | error |= check_patch(patch); | |
1376 | return error; | |
1377 | } | |
1378 | ||
2cf67f1e JH |
1379 | static inline int is_null_sha1(const unsigned char *sha1) |
1380 | { | |
1381 | return !memcmp(sha1, null_sha1, 20); | |
1382 | } | |
1383 | ||
1384 | static void show_index_list(struct patch *list) | |
1385 | { | |
1386 | struct patch *patch; | |
1387 | ||
1388 | /* Once we start supporting the reverse patch, it may be | |
1389 | * worth showing the new sha1 prefix, but until then... | |
1390 | */ | |
1391 | for (patch = list; patch; patch = patch->next) { | |
1392 | const unsigned char *sha1_ptr; | |
1393 | unsigned char sha1[20]; | |
1394 | const char *name; | |
1395 | ||
1396 | name = patch->old_name ? patch->old_name : patch->new_name; | |
1397 | if (patch->is_new) | |
1398 | sha1_ptr = null_sha1; | |
1399 | else if (get_sha1(patch->old_sha1_prefix, sha1)) | |
1400 | die("sha1 information is lacking or useless (%s).", | |
1401 | name); | |
1402 | else | |
1403 | sha1_ptr = sha1; | |
22943f1a JH |
1404 | |
1405 | printf("%06o %s ",patch->old_mode, sha1_to_hex(sha1_ptr)); | |
1406 | if (line_termination && quote_c_style(name, NULL, NULL, 0)) | |
1407 | quote_c_style(name, NULL, stdout, 0); | |
1408 | else | |
1409 | fputs(name, stdout); | |
1410 | putchar(line_termination); | |
2cf67f1e JH |
1411 | } |
1412 | } | |
1413 | ||
a577284a LT |
1414 | static void stat_patch_list(struct patch *patch) |
1415 | { | |
1416 | int files, adds, dels; | |
1417 | ||
1418 | for (files = adds = dels = 0 ; patch ; patch = patch->next) { | |
1419 | files++; | |
1420 | adds += patch->lines_added; | |
1421 | dels += patch->lines_deleted; | |
1422 | show_stats(patch); | |
1423 | } | |
1424 | ||
1425 | printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files, adds, dels); | |
3f40315a LT |
1426 | } |
1427 | ||
7d8b7c21 JH |
1428 | static void numstat_patch_list(struct patch *patch) |
1429 | { | |
1430 | for ( ; patch; patch = patch->next) { | |
1431 | const char *name; | |
1432 | name = patch->old_name ? patch->old_name : patch->new_name; | |
1433 | printf("%d\t%d\t", patch->lines_added, patch->lines_deleted); | |
1434 | if (line_termination && quote_c_style(name, NULL, NULL, 0)) | |
1435 | quote_c_style(name, NULL, stdout, 0); | |
1436 | else | |
1437 | fputs(name, stdout); | |
1438 | putchar('\n'); | |
1439 | } | |
1440 | } | |
1441 | ||
96c912a4 JH |
1442 | static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name) |
1443 | { | |
1444 | if (mode) | |
1445 | printf(" %s mode %06o %s\n", newdelete, mode, name); | |
1446 | else | |
1447 | printf(" %s %s\n", newdelete, name); | |
1448 | } | |
1449 | ||
1450 | static void show_mode_change(struct patch *p, int show_name) | |
1451 | { | |
1452 | if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) { | |
1453 | if (show_name) | |
1454 | printf(" mode change %06o => %06o %s\n", | |
1455 | p->old_mode, p->new_mode, p->new_name); | |
1456 | else | |
1457 | printf(" mode change %06o => %06o\n", | |
1458 | p->old_mode, p->new_mode); | |
1459 | } | |
1460 | } | |
1461 | ||
1462 | static void show_rename_copy(struct patch *p) | |
1463 | { | |
1464 | const char *renamecopy = p->is_rename ? "rename" : "copy"; | |
1465 | const char *old, *new; | |
1466 | ||
1467 | /* Find common prefix */ | |
1468 | old = p->old_name; | |
1469 | new = p->new_name; | |
1470 | while (1) { | |
1471 | const char *slash_old, *slash_new; | |
1472 | slash_old = strchr(old, '/'); | |
1473 | slash_new = strchr(new, '/'); | |
1474 | if (!slash_old || | |
1475 | !slash_new || | |
1476 | slash_old - old != slash_new - new || | |
1477 | memcmp(old, new, slash_new - new)) | |
1478 | break; | |
1479 | old = slash_old + 1; | |
1480 | new = slash_new + 1; | |
1481 | } | |
1482 | /* p->old_name thru old is the common prefix, and old and new | |
1483 | * through the end of names are renames | |
1484 | */ | |
1485 | if (old != p->old_name) | |
1486 | printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy, | |
e30e814d | 1487 | (int)(old - p->old_name), p->old_name, |
96c912a4 JH |
1488 | old, new, p->score); |
1489 | else | |
1490 | printf(" %s %s => %s (%d%%)\n", renamecopy, | |
1491 | p->old_name, p->new_name, p->score); | |
1492 | show_mode_change(p, 0); | |
1493 | } | |
1494 | ||
1495 | static void summary_patch_list(struct patch *patch) | |
1496 | { | |
1497 | struct patch *p; | |
1498 | ||
1499 | for (p = patch; p; p = p->next) { | |
1500 | if (p->is_new) | |
1501 | show_file_mode_name("create", p->new_mode, p->new_name); | |
1502 | else if (p->is_delete) | |
1503 | show_file_mode_name("delete", p->old_mode, p->old_name); | |
1504 | else { | |
1505 | if (p->is_rename || p->is_copy) | |
1506 | show_rename_copy(p); | |
1507 | else { | |
1508 | if (p->score) { | |
1509 | printf(" rewrite %s (%d%%)\n", | |
1510 | p->new_name, p->score); | |
1511 | show_mode_change(p, 0); | |
1512 | } | |
1513 | else | |
1514 | show_mode_change(p, 1); | |
1515 | } | |
1516 | } | |
1517 | } | |
1518 | } | |
1519 | ||
3f40315a LT |
1520 | static void patch_stats(struct patch *patch) |
1521 | { | |
1522 | int lines = patch->lines_added + patch->lines_deleted; | |
1523 | ||
1524 | if (lines > max_change) | |
1525 | max_change = lines; | |
1526 | if (patch->old_name) { | |
22943f1a JH |
1527 | int len = quote_c_style(patch->old_name, NULL, NULL, 0); |
1528 | if (!len) | |
1529 | len = strlen(patch->old_name); | |
3f40315a LT |
1530 | if (len > max_len) |
1531 | max_len = len; | |
1532 | } | |
1533 | if (patch->new_name) { | |
22943f1a JH |
1534 | int len = quote_c_style(patch->new_name, NULL, NULL, 0); |
1535 | if (!len) | |
1536 | len = strlen(patch->new_name); | |
3f40315a LT |
1537 | if (len > max_len) |
1538 | max_len = len; | |
1539 | } | |
19c58fb8 LT |
1540 | } |
1541 | ||
5aa7d94c LT |
1542 | static void remove_file(struct patch *patch) |
1543 | { | |
1544 | if (write_index) { | |
1545 | if (remove_file_from_cache(patch->old_name) < 0) | |
1546 | die("unable to remove %s from index", patch->old_name); | |
1547 | } | |
1548 | unlink(patch->old_name); | |
1549 | } | |
1550 | ||
1551 | static void add_index_file(const char *path, unsigned mode, void *buf, unsigned long size) | |
1552 | { | |
1553 | struct stat st; | |
1554 | struct cache_entry *ce; | |
1555 | int namelen = strlen(path); | |
1556 | unsigned ce_size = cache_entry_size(namelen); | |
1557 | ||
1558 | if (!write_index) | |
1559 | return; | |
1560 | ||
1561 | ce = xmalloc(ce_size); | |
1562 | memset(ce, 0, ce_size); | |
1563 | memcpy(ce->name, path, namelen); | |
1564 | ce->ce_mode = create_ce_mode(mode); | |
1565 | ce->ce_flags = htons(namelen); | |
1566 | if (lstat(path, &st) < 0) | |
1567 | die("unable to stat newly created file %s", path); | |
1568 | fill_stat_cache_info(ce, &st); | |
1569 | if (write_sha1_file(buf, size, "blob", ce->sha1) < 0) | |
1570 | die("unable to create backing store for newly created file %s", path); | |
1571 | if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0) | |
1572 | die("unable to add cache entry for %s", path); | |
1573 | } | |
1574 | ||
5c8af185 LT |
1575 | static void create_subdirectories(const char *path) |
1576 | { | |
1577 | int len = strlen(path); | |
1578 | char *buf = xmalloc(len + 1); | |
1579 | const char *slash = path; | |
1580 | ||
1581 | while ((slash = strchr(slash+1, '/')) != NULL) { | |
1582 | len = slash - path; | |
1583 | memcpy(buf, path, len); | |
1584 | buf[len] = 0; | |
f312de01 | 1585 | if (mkdir(buf, 0777) < 0) { |
5c8af185 LT |
1586 | if (errno != EEXIST) |
1587 | break; | |
1588 | } | |
1589 | } | |
1590 | free(buf); | |
1591 | } | |
1592 | ||
1b668341 LT |
1593 | static int try_create_file(const char *path, unsigned int mode, const char *buf, unsigned long size) |
1594 | { | |
1595 | int fd; | |
1596 | ||
1597 | if (S_ISLNK(mode)) | |
1598 | return symlink(buf, path); | |
1599 | fd = open(path, O_CREAT | O_EXCL | O_WRONLY | O_TRUNC, (mode & 0100) ? 0777 : 0666); | |
1600 | if (fd < 0) | |
1601 | return -1; | |
1602 | while (size) { | |
1603 | int written = write(fd, buf, size); | |
1604 | if (written < 0) { | |
1605 | if (errno == EINTR || errno == EAGAIN) | |
1606 | continue; | |
1607 | die("writing file %s: %s", path, strerror(errno)); | |
1608 | } | |
1609 | if (!written) | |
1610 | die("out of space writing file %s", path); | |
1611 | buf += written; | |
1612 | size -= written; | |
1613 | } | |
1614 | if (close(fd) < 0) | |
1615 | die("closing file %s: %s", path, strerror(errno)); | |
1616 | return 0; | |
1617 | } | |
1618 | ||
5c8af185 LT |
1619 | /* |
1620 | * We optimistically assume that the directories exist, | |
1621 | * which is true 99% of the time anyway. If they don't, | |
1622 | * we create them and try again. | |
1623 | */ | |
1b668341 | 1624 | static void create_one_file(const char *path, unsigned mode, const char *buf, unsigned long size) |
5c8af185 | 1625 | { |
1b668341 LT |
1626 | if (!try_create_file(path, mode, buf, size)) |
1627 | return; | |
5c8af185 | 1628 | |
1b668341 | 1629 | if (errno == ENOENT) { |
5c8af185 | 1630 | create_subdirectories(path); |
1b668341 LT |
1631 | if (!try_create_file(path, mode, buf, size)) |
1632 | return; | |
5c8af185 | 1633 | } |
5c8af185 | 1634 | |
1b668341 LT |
1635 | if (errno == EEXIST) { |
1636 | unsigned int nr = getpid(); | |
5c8af185 | 1637 | |
1b668341 LT |
1638 | for (;;) { |
1639 | const char *newpath; | |
1640 | newpath = mkpath("%s~%u", path, nr); | |
1641 | if (!try_create_file(newpath, mode, buf, size)) { | |
1642 | if (!rename(newpath, path)) | |
1643 | return; | |
1644 | unlink(newpath); | |
1645 | break; | |
1646 | } | |
1647 | if (errno != EEXIST) | |
1648 | break; | |
1649 | } | |
5c8af185 | 1650 | } |
1b668341 | 1651 | die("unable to write file %s mode %o", path, mode); |
5c8af185 LT |
1652 | } |
1653 | ||
5aa7d94c LT |
1654 | static void create_file(struct patch *patch) |
1655 | { | |
1656 | const char *path = patch->new_name; | |
1657 | unsigned mode = patch->new_mode; | |
1658 | unsigned long size = patch->resultsize; | |
1659 | char *buf = patch->result; | |
1660 | ||
1661 | if (!mode) | |
1662 | mode = S_IFREG | 0644; | |
1b668341 LT |
1663 | create_one_file(path, mode, buf, size); |
1664 | add_index_file(path, mode, buf, size); | |
5aa7d94c LT |
1665 | } |
1666 | ||
1667 | static void write_out_one_result(struct patch *patch) | |
1668 | { | |
1669 | if (patch->is_delete > 0) { | |
1670 | remove_file(patch); | |
1671 | return; | |
1672 | } | |
1673 | if (patch->is_new > 0 || patch->is_copy) { | |
1674 | create_file(patch); | |
1675 | return; | |
1676 | } | |
1677 | /* | |
1678 | * Rename or modification boils down to the same | |
1679 | * thing: remove the old, write the new | |
1680 | */ | |
1681 | remove_file(patch); | |
1682 | create_file(patch); | |
1683 | } | |
1684 | ||
d854f783 | 1685 | static void write_out_results(struct patch *list, int skipped_patch) |
5aa7d94c | 1686 | { |
d854f783 | 1687 | if (!list && !skipped_patch) |
f7b79707 LT |
1688 | die("No changes"); |
1689 | ||
5aa7d94c LT |
1690 | while (list) { |
1691 | write_out_one_result(list); | |
1692 | list = list->next; | |
1693 | } | |
1694 | } | |
1695 | ||
1696 | static struct cache_file cache_file; | |
1697 | ||
d854f783 JH |
1698 | static struct excludes { |
1699 | struct excludes *next; | |
1700 | const char *path; | |
1701 | } *excludes; | |
1702 | ||
1703 | static int use_patch(struct patch *p) | |
1704 | { | |
c7c81b3a | 1705 | const char *pathname = p->new_name ? p->new_name : p->old_name; |
d854f783 JH |
1706 | struct excludes *x = excludes; |
1707 | while (x) { | |
1708 | if (fnmatch(x->path, pathname, 0) == 0) | |
1709 | return 0; | |
1710 | x = x->next; | |
1711 | } | |
edf2e370 JH |
1712 | if (0 < prefix_length) { |
1713 | int pathlen = strlen(pathname); | |
1714 | if (pathlen <= prefix_length || | |
1715 | memcmp(prefix, pathname, prefix_length)) | |
1716 | return 0; | |
1717 | } | |
d854f783 JH |
1718 | return 1; |
1719 | } | |
1720 | ||
c1bb9350 LT |
1721 | static int apply_patch(int fd) |
1722 | { | |
5aa7d94c | 1723 | int newfd; |
c1bb9350 LT |
1724 | unsigned long offset, size; |
1725 | char *buffer = read_patch_file(fd, &size); | |
19c58fb8 | 1726 | struct patch *list = NULL, **listp = &list; |
d854f783 | 1727 | int skipped_patch = 0; |
c1bb9350 LT |
1728 | |
1729 | if (!buffer) | |
1730 | return -1; | |
1731 | offset = 0; | |
1732 | while (size > 0) { | |
19c58fb8 LT |
1733 | struct patch *patch; |
1734 | int nr; | |
1735 | ||
1736 | patch = xmalloc(sizeof(*patch)); | |
1737 | memset(patch, 0, sizeof(*patch)); | |
1738 | nr = parse_chunk(buffer + offset, size, patch); | |
c1bb9350 LT |
1739 | if (nr < 0) |
1740 | break; | |
d854f783 JH |
1741 | if (use_patch(patch)) { |
1742 | patch_stats(patch); | |
1743 | *listp = patch; | |
1744 | listp = &patch->next; | |
1745 | } else { | |
1746 | /* perhaps free it a bit better? */ | |
1747 | free(patch); | |
1748 | skipped_patch++; | |
1749 | } | |
c1bb9350 LT |
1750 | offset += nr; |
1751 | size -= nr; | |
1752 | } | |
19c58fb8 | 1753 | |
5aa7d94c LT |
1754 | newfd = -1; |
1755 | write_index = check_index && apply; | |
1756 | if (write_index) | |
1757 | newfd = hold_index_file_for_update(&cache_file, get_index_file()); | |
1758 | if (check_index) { | |
1759 | if (read_cache() < 0) | |
1760 | die("unable to read index file"); | |
1761 | } | |
1762 | ||
a577284a LT |
1763 | if ((check || apply) && check_patch_list(list) < 0) |
1764 | exit(1); | |
1765 | ||
5aa7d94c | 1766 | if (apply) |
d854f783 | 1767 | write_out_results(list, skipped_patch); |
5aa7d94c LT |
1768 | |
1769 | if (write_index) { | |
1770 | if (write_cache(newfd, active_cache, active_nr) || | |
1771 | commit_index_file(&cache_file)) | |
1772 | die("Unable to write new cachefile"); | |
1773 | } | |
1774 | ||
2cf67f1e JH |
1775 | if (show_index_info) |
1776 | show_index_list(list); | |
1777 | ||
a577284a LT |
1778 | if (diffstat) |
1779 | stat_patch_list(list); | |
19c58fb8 | 1780 | |
7d8b7c21 JH |
1781 | if (numstat) |
1782 | numstat_patch_list(list); | |
1783 | ||
96c912a4 JH |
1784 | if (summary) |
1785 | summary_patch_list(list); | |
1786 | ||
c1bb9350 LT |
1787 | free(buffer); |
1788 | return 0; | |
1789 | } | |
1790 | ||
1791 | int main(int argc, char **argv) | |
1792 | { | |
1793 | int i; | |
4dfdbe10 | 1794 | int read_stdin = 1; |
c1bb9350 | 1795 | |
c1bb9350 LT |
1796 | for (i = 1; i < argc; i++) { |
1797 | const char *arg = argv[i]; | |
1798 | int fd; | |
1799 | ||
1800 | if (!strcmp(arg, "-")) { | |
1801 | apply_patch(0); | |
4dfdbe10 | 1802 | read_stdin = 0; |
c1bb9350 LT |
1803 | continue; |
1804 | } | |
d854f783 JH |
1805 | if (!strncmp(arg, "--exclude=", 10)) { |
1806 | struct excludes *x = xmalloc(sizeof(*x)); | |
1807 | x->path = arg + 10; | |
1808 | x->next = excludes; | |
1809 | excludes = x; | |
1810 | continue; | |
1811 | } | |
cb93c193 JH |
1812 | if (!strcmp(arg, "--no-add")) { |
1813 | no_add = 1; | |
1814 | continue; | |
1815 | } | |
fab2c257 | 1816 | if (!strcmp(arg, "--stat")) { |
a577284a | 1817 | apply = 0; |
fab2c257 LT |
1818 | diffstat = 1; |
1819 | continue; | |
1820 | } | |
011f4274 JH |
1821 | if (!strcmp(arg, "--allow-binary-replacement")) { |
1822 | allow_binary_replacement = 1; | |
1823 | continue; | |
1824 | } | |
7d8b7c21 JH |
1825 | if (!strcmp(arg, "--numstat")) { |
1826 | apply = 0; | |
1827 | numstat = 1; | |
1828 | continue; | |
1829 | } | |
96c912a4 JH |
1830 | if (!strcmp(arg, "--summary")) { |
1831 | apply = 0; | |
1832 | summary = 1; | |
1833 | continue; | |
1834 | } | |
a577284a LT |
1835 | if (!strcmp(arg, "--check")) { |
1836 | apply = 0; | |
1837 | check = 1; | |
1838 | continue; | |
1839 | } | |
3cca928d LT |
1840 | if (!strcmp(arg, "--index")) { |
1841 | check_index = 1; | |
1842 | continue; | |
1843 | } | |
aefa4a5b LT |
1844 | if (!strcmp(arg, "--apply")) { |
1845 | apply = 1; | |
1846 | continue; | |
1847 | } | |
22943f1a | 1848 | if (!strcmp(arg, "--index-info")) { |
2cf67f1e JH |
1849 | apply = 0; |
1850 | show_index_info = 1; | |
1851 | continue; | |
1852 | } | |
22943f1a JH |
1853 | if (!strcmp(arg, "-z")) { |
1854 | line_termination = 0; | |
1855 | continue; | |
1856 | } | |
edf2e370 JH |
1857 | |
1858 | if (check_index && prefix_length < 0) { | |
1859 | prefix = setup_git_directory(); | |
1860 | prefix_length = prefix ? strlen(prefix) : 0; | |
1861 | git_config(git_default_config); | |
1862 | } | |
1863 | if (0 < prefix_length) | |
1864 | arg = prefix_filename(prefix, prefix_length, arg); | |
1865 | ||
c1bb9350 LT |
1866 | fd = open(arg, O_RDONLY); |
1867 | if (fd < 0) | |
1868 | usage(apply_usage); | |
4dfdbe10 | 1869 | read_stdin = 0; |
c1bb9350 LT |
1870 | apply_patch(fd); |
1871 | close(fd); | |
1872 | } | |
4dfdbe10 LT |
1873 | if (read_stdin) |
1874 | apply_patch(0); | |
c1bb9350 LT |
1875 | return 0; |
1876 | } |