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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 | ||
e36f8b60 | 22 | static int p_value = 1; |
011f4274 | 23 | static int allow_binary_replacement = 0; |
3cca928d | 24 | static int check_index = 0; |
5aa7d94c | 25 | static int write_index = 0; |
fab2c257 | 26 | static int diffstat = 0; |
7d8b7c21 | 27 | static int numstat = 0; |
96c912a4 | 28 | static int summary = 0; |
a577284a LT |
29 | static int check = 0; |
30 | static int apply = 1; | |
cb93c193 | 31 | static int no_add = 0; |
2cf67f1e | 32 | static int show_index_info = 0; |
22943f1a | 33 | static int line_termination = '\n'; |
12dd6e8c | 34 | static const char apply_usage[] = |
8273c79a | 35 | "git-apply [--stat] [--numstat] [--summary] [--check] [--index] [--apply] [--no-add] [--index-info] [--allow-binary-replacement] [-z] [-pNUM] [--whitespace=<nowarn|warn|error|error-all|strip>] <patch>..."; |
c1bb9350 | 36 | |
19bfcd5a | 37 | static enum whitespace_eol { |
2ae1c53b | 38 | nowarn_whitespace, |
19bfcd5a | 39 | warn_on_whitespace, |
b5767dd6 | 40 | error_on_whitespace, |
2ae1c53b | 41 | strip_whitespace, |
621603b7 | 42 | } new_whitespace = warn_on_whitespace; |
b5767dd6 | 43 | static int whitespace_error = 0; |
fc96b7c9 JH |
44 | static int squelch_whitespace_errors = 5; |
45 | static int applied_after_stripping = 0; | |
b5767dd6 | 46 | static const char *patch_input_file = NULL; |
19bfcd5a | 47 | |
2ae1c53b JH |
48 | static void parse_whitespace_option(const char *option) |
49 | { | |
50 | if (!option) { | |
621603b7 | 51 | new_whitespace = warn_on_whitespace; |
2ae1c53b JH |
52 | return; |
53 | } | |
54 | if (!strcmp(option, "warn")) { | |
55 | new_whitespace = warn_on_whitespace; | |
56 | return; | |
57 | } | |
621603b7 JH |
58 | if (!strcmp(option, "nowarn")) { |
59 | new_whitespace = nowarn_whitespace; | |
60 | return; | |
61 | } | |
2ae1c53b JH |
62 | if (!strcmp(option, "error")) { |
63 | new_whitespace = error_on_whitespace; | |
64 | return; | |
65 | } | |
66 | if (!strcmp(option, "error-all")) { | |
67 | new_whitespace = error_on_whitespace; | |
68 | squelch_whitespace_errors = 0; | |
69 | return; | |
70 | } | |
71 | if (!strcmp(option, "strip")) { | |
72 | new_whitespace = strip_whitespace; | |
73 | return; | |
74 | } | |
75 | die("unrecognized whitespace option '%s'", option); | |
76 | } | |
77 | ||
f21d6726 JH |
78 | static void set_default_whitespace_mode(const char *whitespace_option) |
79 | { | |
80 | if (!whitespace_option && !apply_default_whitespace) { | |
81 | new_whitespace = (apply | |
82 | ? warn_on_whitespace | |
83 | : nowarn_whitespace); | |
84 | } | |
85 | } | |
86 | ||
3f40315a LT |
87 | /* |
88 | * For "diff-stat" like behaviour, we keep track of the biggest change | |
89 | * we've seen, and the longest filename. That allows us to do simple | |
90 | * scaling. | |
91 | */ | |
92 | static int max_change, max_len; | |
93 | ||
a4acb0eb LT |
94 | /* |
95 | * Various "current state", notably line numbers and what | |
96 | * file (and how) we're patching right now.. The "is_xxxx" | |
97 | * things are flags, where -1 means "don't know yet". | |
98 | */ | |
46979f56 | 99 | static int linenr = 1; |
19c58fb8 LT |
100 | |
101 | struct fragment { | |
102 | unsigned long oldpos, oldlines; | |
103 | unsigned long newpos, newlines; | |
104 | const char *patch; | |
105 | int size; | |
106 | struct fragment *next; | |
107 | }; | |
108 | ||
109 | struct patch { | |
5041aa70 | 110 | char *new_name, *old_name, *def_name; |
19c58fb8 | 111 | unsigned int old_mode, new_mode; |
ff36de08 | 112 | int is_rename, is_copy, is_new, is_delete, is_binary; |
3f40315a | 113 | int lines_added, lines_deleted; |
96c912a4 | 114 | int score; |
19c58fb8 | 115 | struct fragment *fragments; |
5aa7d94c | 116 | char *result; |
3cca928d | 117 | unsigned long resultsize; |
2cf67f1e JH |
118 | char old_sha1_prefix[41]; |
119 | char new_sha1_prefix[41]; | |
19c58fb8 LT |
120 | struct patch *next; |
121 | }; | |
46979f56 | 122 | |
c1bb9350 | 123 | #define CHUNKSIZE (8192) |
a4acb0eb | 124 | #define SLOP (16) |
c1bb9350 LT |
125 | |
126 | static void *read_patch_file(int fd, unsigned long *sizep) | |
127 | { | |
128 | unsigned long size = 0, alloc = CHUNKSIZE; | |
129 | void *buffer = xmalloc(alloc); | |
130 | ||
131 | for (;;) { | |
132 | int nr = alloc - size; | |
133 | if (nr < 1024) { | |
134 | alloc += CHUNKSIZE; | |
135 | buffer = xrealloc(buffer, alloc); | |
136 | nr = alloc - size; | |
137 | } | |
1c15afb9 | 138 | nr = xread(fd, buffer + size, nr); |
c1bb9350 LT |
139 | if (!nr) |
140 | break; | |
1c15afb9 | 141 | if (nr < 0) |
c1bb9350 | 142 | die("git-apply: read returned %s", strerror(errno)); |
c1bb9350 LT |
143 | size += nr; |
144 | } | |
145 | *sizep = size; | |
a4acb0eb LT |
146 | |
147 | /* | |
148 | * Make sure that we have some slop in the buffer | |
149 | * so that we can do speculative "memcmp" etc, and | |
150 | * see to it that it is NUL-filled. | |
151 | */ | |
152 | if (alloc < size + SLOP) | |
153 | buffer = xrealloc(buffer, size + SLOP); | |
154 | memset(buffer + size, 0, SLOP); | |
c1bb9350 LT |
155 | return buffer; |
156 | } | |
157 | ||
3cca928d | 158 | static unsigned long linelen(const char *buffer, unsigned long size) |
c1bb9350 LT |
159 | { |
160 | unsigned long len = 0; | |
161 | while (size--) { | |
162 | len++; | |
163 | if (*buffer++ == '\n') | |
164 | break; | |
165 | } | |
166 | return len; | |
167 | } | |
168 | ||
a4acb0eb LT |
169 | static int is_dev_null(const char *str) |
170 | { | |
171 | return !memcmp("/dev/null", str, 9) && isspace(str[9]); | |
172 | } | |
173 | ||
381ca9a3 LT |
174 | #define TERM_SPACE 1 |
175 | #define TERM_TAB 2 | |
9a4a100e LT |
176 | |
177 | static int name_terminate(const char *name, int namelen, int c, int terminate) | |
178 | { | |
179 | if (c == ' ' && !(terminate & TERM_SPACE)) | |
180 | return 0; | |
181 | if (c == '\t' && !(terminate & TERM_TAB)) | |
182 | return 0; | |
183 | ||
9a4a100e LT |
184 | return 1; |
185 | } | |
186 | ||
187 | static char * find_name(const char *line, char *def, int p_value, int terminate) | |
c1bb9350 | 188 | { |
a4acb0eb LT |
189 | int len; |
190 | const char *start = line; | |
191 | char *name; | |
192 | ||
22943f1a JH |
193 | if (*line == '"') { |
194 | /* Proposed "new-style" GNU patch/diff format; see | |
195 | * http://marc.theaimsgroup.com/?l=git&m=112927316408690&w=2 | |
196 | */ | |
197 | name = unquote_c_style(line, NULL); | |
198 | if (name) { | |
199 | char *cp = name; | |
200 | while (p_value) { | |
201 | cp = strchr(name, '/'); | |
202 | if (!cp) | |
203 | break; | |
204 | cp++; | |
205 | p_value--; | |
206 | } | |
207 | if (cp) { | |
208 | /* name can later be freed, so we need | |
209 | * to memmove, not just return cp | |
210 | */ | |
211 | memmove(name, cp, strlen(cp) + 1); | |
212 | free(def); | |
213 | return name; | |
214 | } | |
215 | else { | |
216 | free(name); | |
217 | name = NULL; | |
218 | } | |
219 | } | |
220 | } | |
221 | ||
c1bb9350 | 222 | for (;;) { |
a4acb0eb | 223 | char c = *line; |
9a4a100e LT |
224 | |
225 | if (isspace(c)) { | |
226 | if (c == '\n') | |
227 | break; | |
228 | if (name_terminate(start, line-start, c, terminate)) | |
229 | break; | |
230 | } | |
a4acb0eb LT |
231 | line++; |
232 | if (c == '/' && !--p_value) | |
233 | start = line; | |
234 | } | |
235 | if (!start) | |
236 | return def; | |
237 | len = line - start; | |
238 | if (!len) | |
239 | return def; | |
240 | ||
241 | /* | |
242 | * Generally we prefer the shorter name, especially | |
243 | * if the other one is just a variation of that with | |
244 | * something else tacked on to the end (ie "file.orig" | |
245 | * or "file~"). | |
246 | */ | |
247 | if (def) { | |
248 | int deflen = strlen(def); | |
249 | if (deflen < len && !strncmp(start, def, deflen)) | |
250 | return def; | |
c1bb9350 | 251 | } |
a4acb0eb LT |
252 | |
253 | name = xmalloc(len + 1); | |
254 | memcpy(name, start, len); | |
255 | name[len] = 0; | |
256 | free(def); | |
257 | return name; | |
258 | } | |
259 | ||
260 | /* | |
261 | * Get the name etc info from the --/+++ lines of a traditional patch header | |
262 | * | |
263 | * NOTE! This hardcodes "-p1" behaviour in filename detection. | |
9a4a100e LT |
264 | * |
265 | * FIXME! The end-of-filename heuristics are kind of screwy. For existing | |
266 | * files, we can happily check the index for a match, but for creating a | |
267 | * new file we should try to match whatever "patch" does. I have no idea. | |
a4acb0eb | 268 | */ |
19c58fb8 | 269 | static void parse_traditional_patch(const char *first, const char *second, struct patch *patch) |
a4acb0eb | 270 | { |
a4acb0eb LT |
271 | char *name; |
272 | ||
273 | first += 4; // skip "--- " | |
274 | second += 4; // skip "+++ " | |
275 | if (is_dev_null(first)) { | |
19c58fb8 LT |
276 | patch->is_new = 1; |
277 | patch->is_delete = 0; | |
5041aa70 | 278 | name = find_name(second, NULL, p_value, TERM_SPACE | TERM_TAB); |
19c58fb8 | 279 | patch->new_name = name; |
a4acb0eb | 280 | } else if (is_dev_null(second)) { |
19c58fb8 LT |
281 | patch->is_new = 0; |
282 | patch->is_delete = 1; | |
381ca9a3 | 283 | name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB); |
19c58fb8 | 284 | patch->old_name = name; |
a4acb0eb | 285 | } else { |
381ca9a3 LT |
286 | name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB); |
287 | name = find_name(second, name, p_value, TERM_SPACE | TERM_TAB); | |
19c58fb8 | 288 | patch->old_name = patch->new_name = name; |
a4acb0eb LT |
289 | } |
290 | if (!name) | |
291 | die("unable to find filename in patch at line %d", linenr); | |
a4acb0eb LT |
292 | } |
293 | ||
19c58fb8 | 294 | static int gitdiff_hdrend(const char *line, struct patch *patch) |
a4acb0eb LT |
295 | { |
296 | return -1; | |
297 | } | |
298 | ||
1e3f6b6e LT |
299 | /* |
300 | * We're anal about diff header consistency, to make | |
301 | * sure that we don't end up having strange ambiguous | |
302 | * patches floating around. | |
303 | * | |
304 | * As a result, gitdiff_{old|new}name() will check | |
305 | * their names against any previous information, just | |
306 | * to make sure.. | |
307 | */ | |
308 | static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, const char *oldnew) | |
309 | { | |
1e3f6b6e LT |
310 | if (!orig_name && !isnull) |
311 | return find_name(line, NULL, 1, 0); | |
312 | ||
1e3f6b6e | 313 | if (orig_name) { |
22943f1a JH |
314 | int len; |
315 | const char *name; | |
316 | char *another; | |
1e3f6b6e LT |
317 | name = orig_name; |
318 | len = strlen(name); | |
319 | if (isnull) | |
320 | die("git-apply: bad git-diff - expected /dev/null, got %s on line %d", name, linenr); | |
22943f1a JH |
321 | another = find_name(line, NULL, 1, 0); |
322 | if (!another || memcmp(another, name, len)) | |
323 | die("git-apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr); | |
324 | free(another); | |
1e3f6b6e LT |
325 | return orig_name; |
326 | } | |
22943f1a JH |
327 | else { |
328 | /* expect "/dev/null" */ | |
329 | if (memcmp("/dev/null", line, 9) || line[9] != '\n') | |
330 | die("git-apply: bad git-diff - expected /dev/null on line %d", linenr); | |
331 | return NULL; | |
332 | } | |
1e3f6b6e LT |
333 | } |
334 | ||
19c58fb8 | 335 | static int gitdiff_oldname(const char *line, struct patch *patch) |
a4acb0eb | 336 | { |
19c58fb8 | 337 | patch->old_name = gitdiff_verify_name(line, patch->is_new, patch->old_name, "old"); |
a4acb0eb LT |
338 | return 0; |
339 | } | |
340 | ||
19c58fb8 | 341 | static int gitdiff_newname(const char *line, struct patch *patch) |
a4acb0eb | 342 | { |
19c58fb8 | 343 | patch->new_name = gitdiff_verify_name(line, patch->is_delete, patch->new_name, "new"); |
a4acb0eb LT |
344 | return 0; |
345 | } | |
346 | ||
19c58fb8 | 347 | static int gitdiff_oldmode(const char *line, struct patch *patch) |
a4acb0eb | 348 | { |
19c58fb8 | 349 | patch->old_mode = strtoul(line, NULL, 8); |
a4acb0eb LT |
350 | return 0; |
351 | } | |
352 | ||
19c58fb8 | 353 | static int gitdiff_newmode(const char *line, struct patch *patch) |
a4acb0eb | 354 | { |
19c58fb8 | 355 | patch->new_mode = strtoul(line, NULL, 8); |
a4acb0eb LT |
356 | return 0; |
357 | } | |
358 | ||
19c58fb8 | 359 | static int gitdiff_delete(const char *line, struct patch *patch) |
a4acb0eb | 360 | { |
19c58fb8 | 361 | patch->is_delete = 1; |
5041aa70 | 362 | patch->old_name = patch->def_name; |
19c58fb8 | 363 | return gitdiff_oldmode(line, patch); |
a4acb0eb LT |
364 | } |
365 | ||
19c58fb8 | 366 | static int gitdiff_newfile(const char *line, struct patch *patch) |
a4acb0eb | 367 | { |
19c58fb8 | 368 | patch->is_new = 1; |
5041aa70 | 369 | patch->new_name = patch->def_name; |
19c58fb8 | 370 | return gitdiff_newmode(line, patch); |
a4acb0eb LT |
371 | } |
372 | ||
19c58fb8 | 373 | static int gitdiff_copysrc(const char *line, struct patch *patch) |
a4acb0eb | 374 | { |
19c58fb8 LT |
375 | patch->is_copy = 1; |
376 | patch->old_name = find_name(line, NULL, 0, 0); | |
a4acb0eb LT |
377 | return 0; |
378 | } | |
379 | ||
19c58fb8 | 380 | static int gitdiff_copydst(const char *line, struct patch *patch) |
a4acb0eb | 381 | { |
19c58fb8 LT |
382 | patch->is_copy = 1; |
383 | patch->new_name = find_name(line, NULL, 0, 0); | |
a4acb0eb LT |
384 | return 0; |
385 | } | |
386 | ||
19c58fb8 | 387 | static int gitdiff_renamesrc(const char *line, struct patch *patch) |
a4acb0eb | 388 | { |
19c58fb8 LT |
389 | patch->is_rename = 1; |
390 | patch->old_name = find_name(line, NULL, 0, 0); | |
a4acb0eb LT |
391 | return 0; |
392 | } | |
393 | ||
19c58fb8 | 394 | static int gitdiff_renamedst(const char *line, struct patch *patch) |
a4acb0eb | 395 | { |
19c58fb8 LT |
396 | patch->is_rename = 1; |
397 | patch->new_name = find_name(line, NULL, 0, 0); | |
a4acb0eb LT |
398 | return 0; |
399 | } | |
400 | ||
19c58fb8 | 401 | static int gitdiff_similarity(const char *line, struct patch *patch) |
a4acb0eb | 402 | { |
96c912a4 JH |
403 | if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX) |
404 | patch->score = 0; | |
a4acb0eb | 405 | return 0; |
c1bb9350 LT |
406 | } |
407 | ||
70aadac0 JH |
408 | static int gitdiff_dissimilarity(const char *line, struct patch *patch) |
409 | { | |
96c912a4 JH |
410 | if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX) |
411 | patch->score = 0; | |
70aadac0 JH |
412 | return 0; |
413 | } | |
414 | ||
2cf67f1e JH |
415 | static int gitdiff_index(const char *line, struct patch *patch) |
416 | { | |
417 | /* index line is N hexadecimal, "..", N hexadecimal, | |
418 | * and optional space with octal mode. | |
419 | */ | |
420 | const char *ptr, *eol; | |
421 | int len; | |
422 | ||
423 | ptr = strchr(line, '.'); | |
9add69b1 | 424 | if (!ptr || ptr[1] != '.' || 40 < ptr - line) |
2cf67f1e JH |
425 | return 0; |
426 | len = ptr - line; | |
427 | memcpy(patch->old_sha1_prefix, line, len); | |
428 | patch->old_sha1_prefix[len] = 0; | |
429 | ||
430 | line = ptr + 2; | |
431 | ptr = strchr(line, ' '); | |
432 | eol = strchr(line, '\n'); | |
433 | ||
434 | if (!ptr || eol < ptr) | |
435 | ptr = eol; | |
436 | len = ptr - line; | |
437 | ||
9add69b1 | 438 | if (40 < len) |
2cf67f1e JH |
439 | return 0; |
440 | memcpy(patch->new_sha1_prefix, line, len); | |
441 | patch->new_sha1_prefix[len] = 0; | |
442 | if (*ptr == ' ') | |
443 | patch->new_mode = patch->old_mode = strtoul(ptr+1, NULL, 8); | |
444 | return 0; | |
445 | } | |
446 | ||
9a4a100e LT |
447 | /* |
448 | * This is normal for a diff that doesn't change anything: we'll fall through | |
449 | * into the next diff. Tell the parser to break out. | |
450 | */ | |
19c58fb8 | 451 | static int gitdiff_unrecognized(const char *line, struct patch *patch) |
9a4a100e LT |
452 | { |
453 | return -1; | |
454 | } | |
455 | ||
22943f1a JH |
456 | static const char *stop_at_slash(const char *line, int llen) |
457 | { | |
458 | int i; | |
459 | ||
460 | for (i = 0; i < llen; i++) { | |
461 | int ch = line[i]; | |
462 | if (ch == '/') | |
463 | return line + i; | |
464 | } | |
465 | return NULL; | |
466 | } | |
467 | ||
468 | /* This is to extract the same name that appears on "diff --git" | |
469 | * line. We do not find and return anything if it is a rename | |
470 | * patch, and it is OK because we will find the name elsewhere. | |
471 | * We need to reliably find name only when it is mode-change only, | |
472 | * creation or deletion of an empty file. In any of these cases, | |
473 | * both sides are the same name under a/ and b/ respectively. | |
474 | */ | |
475 | static char *git_header_name(char *line, int llen) | |
5041aa70 LT |
476 | { |
477 | int len; | |
22943f1a JH |
478 | const char *name; |
479 | const char *second = NULL; | |
5041aa70 | 480 | |
22943f1a JH |
481 | line += strlen("diff --git "); |
482 | llen -= strlen("diff --git "); | |
483 | ||
484 | if (*line == '"') { | |
485 | const char *cp; | |
486 | char *first = unquote_c_style(line, &second); | |
487 | if (!first) | |
5041aa70 | 488 | return NULL; |
22943f1a JH |
489 | |
490 | /* advance to the first slash */ | |
491 | cp = stop_at_slash(first, strlen(first)); | |
492 | if (!cp || cp == first) { | |
493 | /* we do not accept absolute paths */ | |
494 | free_first_and_fail: | |
495 | free(first); | |
496 | return NULL; | |
497 | } | |
498 | len = strlen(cp+1); | |
499 | memmove(first, cp+1, len+1); /* including NUL */ | |
500 | ||
501 | /* second points at one past closing dq of name. | |
502 | * find the second name. | |
503 | */ | |
504 | while ((second < line + llen) && isspace(*second)) | |
505 | second++; | |
506 | ||
507 | if (line + llen <= second) | |
508 | goto free_first_and_fail; | |
509 | if (*second == '"') { | |
510 | char *sp = unquote_c_style(second, NULL); | |
511 | if (!sp) | |
512 | goto free_first_and_fail; | |
513 | cp = stop_at_slash(sp, strlen(sp)); | |
514 | if (!cp || cp == sp) { | |
515 | free_both_and_fail: | |
516 | free(sp); | |
517 | goto free_first_and_fail; | |
518 | } | |
519 | /* They must match, otherwise ignore */ | |
520 | if (strcmp(cp+1, first)) | |
521 | goto free_both_and_fail; | |
522 | free(sp); | |
523 | return first; | |
524 | } | |
525 | ||
526 | /* unquoted second */ | |
527 | cp = stop_at_slash(second, line + llen - second); | |
528 | if (!cp || cp == second) | |
529 | goto free_first_and_fail; | |
530 | cp++; | |
531 | if (line + llen - cp != len + 1 || | |
532 | memcmp(first, cp, len)) | |
533 | goto free_first_and_fail; | |
534 | return first; | |
5041aa70 LT |
535 | } |
536 | ||
22943f1a JH |
537 | /* unquoted first name */ |
538 | name = stop_at_slash(line, llen); | |
539 | if (!name || name == line) | |
5041aa70 LT |
540 | return NULL; |
541 | ||
22943f1a JH |
542 | name++; |
543 | ||
544 | /* since the first name is unquoted, a dq if exists must be | |
545 | * the beginning of the second name. | |
546 | */ | |
547 | for (second = name; second < line + llen; second++) { | |
548 | if (*second == '"') { | |
549 | const char *cp = second; | |
550 | const char *np; | |
551 | char *sp = unquote_c_style(second, NULL); | |
552 | ||
553 | if (!sp) | |
554 | return NULL; | |
555 | np = stop_at_slash(sp, strlen(sp)); | |
556 | if (!np || np == sp) { | |
557 | free_second_and_fail: | |
558 | free(sp); | |
559 | return NULL; | |
560 | } | |
561 | np++; | |
562 | len = strlen(np); | |
563 | if (len < cp - name && | |
564 | !strncmp(np, name, len) && | |
565 | isspace(name[len])) { | |
566 | /* Good */ | |
567 | memmove(sp, np, len + 1); | |
568 | return sp; | |
569 | } | |
570 | goto free_second_and_fail; | |
571 | } | |
572 | } | |
573 | ||
5041aa70 LT |
574 | /* |
575 | * Accept a name only if it shows up twice, exactly the same | |
576 | * form. | |
577 | */ | |
578 | for (len = 0 ; ; len++) { | |
579 | char c = name[len]; | |
580 | ||
581 | switch (c) { | |
582 | default: | |
583 | continue; | |
584 | case '\n': | |
e70a165d | 585 | return NULL; |
5041aa70 LT |
586 | case '\t': case ' ': |
587 | second = name+len; | |
588 | for (;;) { | |
589 | char c = *second++; | |
590 | if (c == '\n') | |
591 | return NULL; | |
592 | if (c == '/') | |
593 | break; | |
594 | } | |
0e87e048 | 595 | if (second[len] == '\n' && !memcmp(name, second, len)) { |
5041aa70 LT |
596 | char *ret = xmalloc(len + 1); |
597 | memcpy(ret, name, len); | |
598 | ret[len] = 0; | |
599 | return ret; | |
600 | } | |
601 | } | |
602 | } | |
603 | return NULL; | |
604 | } | |
605 | ||
c1bb9350 | 606 | /* Verify that we recognize the lines following a git header */ |
19c58fb8 | 607 | static int parse_git_header(char *line, int len, unsigned int size, struct patch *patch) |
c1bb9350 | 608 | { |
a4acb0eb LT |
609 | unsigned long offset; |
610 | ||
611 | /* A git diff has explicit new/delete information, so we don't guess */ | |
19c58fb8 LT |
612 | patch->is_new = 0; |
613 | patch->is_delete = 0; | |
a4acb0eb | 614 | |
5041aa70 LT |
615 | /* |
616 | * Some things may not have the old name in the | |
617 | * rest of the headers anywhere (pure mode changes, | |
618 | * or removing or adding empty files), so we get | |
619 | * the default name from the header. | |
620 | */ | |
22943f1a | 621 | patch->def_name = git_header_name(line, len); |
5041aa70 | 622 | |
a4acb0eb LT |
623 | line += len; |
624 | size -= len; | |
625 | linenr++; | |
626 | for (offset = len ; size > 0 ; offset += len, size -= len, line += len, linenr++) { | |
627 | static const struct opentry { | |
628 | const char *str; | |
19c58fb8 | 629 | int (*fn)(const char *, struct patch *); |
a4acb0eb LT |
630 | } optable[] = { |
631 | { "@@ -", gitdiff_hdrend }, | |
632 | { "--- ", gitdiff_oldname }, | |
633 | { "+++ ", gitdiff_newname }, | |
634 | { "old mode ", gitdiff_oldmode }, | |
635 | { "new mode ", gitdiff_newmode }, | |
636 | { "deleted file mode ", gitdiff_delete }, | |
637 | { "new file mode ", gitdiff_newfile }, | |
638 | { "copy from ", gitdiff_copysrc }, | |
639 | { "copy to ", gitdiff_copydst }, | |
33f4d087 LT |
640 | { "rename old ", gitdiff_renamesrc }, |
641 | { "rename new ", gitdiff_renamedst }, | |
dc938417 LT |
642 | { "rename from ", gitdiff_renamesrc }, |
643 | { "rename to ", gitdiff_renamedst }, | |
a4acb0eb | 644 | { "similarity index ", gitdiff_similarity }, |
70aadac0 | 645 | { "dissimilarity index ", gitdiff_dissimilarity }, |
2cf67f1e | 646 | { "index ", gitdiff_index }, |
9a4a100e | 647 | { "", gitdiff_unrecognized }, |
a4acb0eb LT |
648 | }; |
649 | int i; | |
c1bb9350 | 650 | |
c1bb9350 | 651 | len = linelen(line, size); |
a4acb0eb | 652 | if (!len || line[len-1] != '\n') |
c1bb9350 | 653 | break; |
a4acb0eb LT |
654 | for (i = 0; i < sizeof(optable) / sizeof(optable[0]); i++) { |
655 | const struct opentry *p = optable + i; | |
656 | int oplen = strlen(p->str); | |
657 | if (len < oplen || memcmp(p->str, line, oplen)) | |
658 | continue; | |
19c58fb8 | 659 | if (p->fn(line + oplen, patch) < 0) |
a4acb0eb | 660 | return offset; |
9a4a100e | 661 | break; |
a4acb0eb | 662 | } |
c1bb9350 LT |
663 | } |
664 | ||
a4acb0eb | 665 | return offset; |
c1bb9350 LT |
666 | } |
667 | ||
fab2c257 | 668 | static int parse_num(const char *line, unsigned long *p) |
46979f56 LT |
669 | { |
670 | char *ptr; | |
fab2c257 LT |
671 | |
672 | if (!isdigit(*line)) | |
673 | return 0; | |
674 | *p = strtoul(line, &ptr, 10); | |
675 | return ptr - line; | |
676 | } | |
677 | ||
678 | static int parse_range(const char *line, int len, int offset, const char *expect, | |
679 | unsigned long *p1, unsigned long *p2) | |
680 | { | |
46979f56 LT |
681 | int digits, ex; |
682 | ||
683 | if (offset < 0 || offset >= len) | |
684 | return -1; | |
685 | line += offset; | |
686 | len -= offset; | |
687 | ||
fab2c257 LT |
688 | digits = parse_num(line, p1); |
689 | if (!digits) | |
46979f56 | 690 | return -1; |
46979f56 LT |
691 | |
692 | offset += digits; | |
693 | line += digits; | |
694 | len -= digits; | |
695 | ||
fab2c257 LT |
696 | *p2 = *p1; |
697 | if (*line == ',') { | |
698 | digits = parse_num(line+1, p2); | |
699 | if (!digits) | |
700 | return -1; | |
701 | ||
702 | offset += digits+1; | |
703 | line += digits+1; | |
704 | len -= digits+1; | |
705 | } | |
706 | ||
46979f56 LT |
707 | ex = strlen(expect); |
708 | if (ex > len) | |
709 | return -1; | |
710 | if (memcmp(line, expect, ex)) | |
711 | return -1; | |
712 | ||
713 | return offset + ex; | |
714 | } | |
715 | ||
716 | /* | |
717 | * Parse a unified diff fragment header of the | |
718 | * form "@@ -a,b +c,d @@" | |
719 | */ | |
19c58fb8 | 720 | static int parse_fragment_header(char *line, int len, struct fragment *fragment) |
46979f56 LT |
721 | { |
722 | int offset; | |
723 | ||
724 | if (!len || line[len-1] != '\n') | |
725 | return -1; | |
726 | ||
727 | /* Figure out the number of lines in a fragment */ | |
fab2c257 LT |
728 | offset = parse_range(line, len, 4, " +", &fragment->oldpos, &fragment->oldlines); |
729 | offset = parse_range(line, len, offset, " @@", &fragment->newpos, &fragment->newlines); | |
46979f56 LT |
730 | |
731 | return offset; | |
732 | } | |
733 | ||
19c58fb8 | 734 | static int find_header(char *line, unsigned long size, int *hdrsize, struct patch *patch) |
c1bb9350 LT |
735 | { |
736 | unsigned long offset, len; | |
737 | ||
19c58fb8 LT |
738 | patch->is_rename = patch->is_copy = 0; |
739 | patch->is_new = patch->is_delete = -1; | |
740 | patch->old_mode = patch->new_mode = 0; | |
741 | patch->old_name = patch->new_name = NULL; | |
46979f56 | 742 | for (offset = 0; size > 0; offset += len, size -= len, line += len, linenr++) { |
c1bb9350 LT |
743 | unsigned long nextlen; |
744 | ||
745 | len = linelen(line, size); | |
746 | if (!len) | |
747 | break; | |
748 | ||
749 | /* Testing this early allows us to take a few shortcuts.. */ | |
750 | if (len < 6) | |
751 | continue; | |
46979f56 LT |
752 | |
753 | /* | |
754 | * Make sure we don't find any unconnected patch fragmants. | |
755 | * That's a sign that we didn't find a header, and that a | |
756 | * patch has become corrupted/broken up. | |
757 | */ | |
758 | if (!memcmp("@@ -", line, 4)) { | |
19c58fb8 LT |
759 | struct fragment dummy; |
760 | if (parse_fragment_header(line, len, &dummy) < 0) | |
46979f56 | 761 | continue; |
4ec99bf0 | 762 | error("patch fragment without header at line %d: %.*s", linenr, (int)len-1, line); |
46979f56 LT |
763 | } |
764 | ||
c1bb9350 LT |
765 | if (size < len + 6) |
766 | break; | |
767 | ||
768 | /* | |
769 | * Git patch? It might not have a real patch, just a rename | |
770 | * or mode change, so we handle that specially | |
771 | */ | |
772 | if (!memcmp("diff --git ", line, 11)) { | |
19c58fb8 | 773 | int git_hdr_len = parse_git_header(line, len, size, patch); |
206de27e | 774 | if (git_hdr_len <= len) |
c1bb9350 | 775 | continue; |
b7e8039a LT |
776 | if (!patch->old_name && !patch->new_name) { |
777 | if (!patch->def_name) | |
778 | die("git diff header lacks filename information (line %d)", linenr); | |
779 | patch->old_name = patch->new_name = patch->def_name; | |
780 | } | |
a4acb0eb | 781 | *hdrsize = git_hdr_len; |
c1bb9350 LT |
782 | return offset; |
783 | } | |
784 | ||
785 | /** --- followed by +++ ? */ | |
786 | if (memcmp("--- ", line, 4) || memcmp("+++ ", line + len, 4)) | |
787 | continue; | |
788 | ||
789 | /* | |
790 | * We only accept unified patches, so we want it to | |
791 | * at least have "@@ -a,b +c,d @@\n", which is 14 chars | |
792 | * minimum | |
793 | */ | |
794 | nextlen = linelen(line + len, size - len); | |
795 | if (size < nextlen + 14 || memcmp("@@ -", line + len + nextlen, 4)) | |
796 | continue; | |
797 | ||
798 | /* Ok, we'll consider it a patch */ | |
19c58fb8 | 799 | parse_traditional_patch(line, line+len, patch); |
c1bb9350 | 800 | *hdrsize = len + nextlen; |
46979f56 | 801 | linenr += 2; |
c1bb9350 LT |
802 | return offset; |
803 | } | |
804 | return -1; | |
805 | } | |
806 | ||
c1bb9350 LT |
807 | /* |
808 | * Parse a unified diff. Note that this really needs | |
809 | * to parse each fragment separately, since the only | |
810 | * way to know the difference between a "---" that is | |
811 | * part of a patch, and a "---" that starts the next | |
812 | * patch is to look at the line counts.. | |
813 | */ | |
19c58fb8 | 814 | static int parse_fragment(char *line, unsigned long size, struct patch *patch, struct fragment *fragment) |
c1bb9350 | 815 | { |
3f40315a | 816 | int added, deleted; |
c1bb9350 | 817 | int len = linelen(line, size), offset; |
30996652 | 818 | unsigned long oldlines, newlines; |
c1bb9350 | 819 | |
19c58fb8 | 820 | offset = parse_fragment_header(line, len, fragment); |
c1bb9350 LT |
821 | if (offset < 0) |
822 | return -1; | |
19c58fb8 LT |
823 | oldlines = fragment->oldlines; |
824 | newlines = fragment->newlines; | |
c1bb9350 | 825 | |
30996652 LT |
826 | if (patch->is_new < 0) { |
827 | patch->is_new = !oldlines; | |
828 | if (!oldlines) | |
829 | patch->old_name = NULL; | |
830 | } | |
831 | if (patch->is_delete < 0) { | |
832 | patch->is_delete = !newlines; | |
833 | if (!newlines) | |
834 | patch->new_name = NULL; | |
835 | } | |
836 | ||
837 | if (patch->is_new != !oldlines) | |
838 | return error("new file depends on old contents"); | |
af3f929f LT |
839 | if (patch->is_delete != !newlines) { |
840 | if (newlines) | |
841 | return error("deleted file still has contents"); | |
842 | fprintf(stderr, "** warning: file %s becomes empty but is not deleted\n", patch->new_name); | |
843 | } | |
a4acb0eb | 844 | |
c1bb9350 LT |
845 | /* Parse the thing.. */ |
846 | line += len; | |
847 | size -= len; | |
46979f56 | 848 | linenr++; |
3f40315a | 849 | added = deleted = 0; |
46979f56 | 850 | for (offset = len; size > 0; offset += len, size -= len, line += len, linenr++) { |
c1bb9350 LT |
851 | if (!oldlines && !newlines) |
852 | break; | |
853 | len = linelen(line, size); | |
854 | if (!len || line[len-1] != '\n') | |
855 | return -1; | |
856 | switch (*line) { | |
857 | default: | |
858 | return -1; | |
859 | case ' ': | |
860 | oldlines--; | |
861 | newlines--; | |
862 | break; | |
863 | case '-': | |
3f40315a | 864 | deleted++; |
c1bb9350 LT |
865 | oldlines--; |
866 | break; | |
867 | case '+': | |
19bfcd5a LT |
868 | /* |
869 | * We know len is at least two, since we have a '+' and | |
b5767dd6 JH |
870 | * we checked that the last character was a '\n' above. |
871 | * That is, an addition of an empty line would check | |
872 | * the '+' here. Sneaky... | |
19bfcd5a | 873 | */ |
2ae1c53b | 874 | if ((new_whitespace != nowarn_whitespace) && |
b5767dd6 | 875 | isspace(line[len-2])) { |
fc96b7c9 JH |
876 | whitespace_error++; |
877 | if (squelch_whitespace_errors && | |
878 | squelch_whitespace_errors < | |
879 | whitespace_error) | |
880 | ; | |
881 | else { | |
882 | fprintf(stderr, "Adds trailing whitespace.\n%s:%d:%.*s\n", | |
883 | patch_input_file, | |
884 | linenr, len-2, line+1); | |
885 | } | |
19bfcd5a | 886 | } |
3f40315a | 887 | added++; |
c1bb9350 LT |
888 | newlines--; |
889 | break; | |
433ef8a2 FK |
890 | |
891 | /* We allow "\ No newline at end of file". Depending | |
892 | * on locale settings when the patch was produced we | |
893 | * don't know what this line looks like. The only | |
56d33b11 JH |
894 | * thing we do know is that it begins with "\ ". |
895 | * Checking for 12 is just for sanity check -- any | |
896 | * l10n of "\ No newline..." is at least that long. | |
897 | */ | |
fab2c257 | 898 | case '\\': |
433ef8a2 | 899 | if (len < 12 || memcmp(line, "\\ ", 2)) |
3cca928d | 900 | return -1; |
fab2c257 | 901 | break; |
c1bb9350 LT |
902 | } |
903 | } | |
8b64647d JH |
904 | /* If a fragment ends with an incomplete line, we failed to include |
905 | * it in the above loop because we hit oldlines == newlines == 0 | |
906 | * before seeing it. | |
907 | */ | |
433ef8a2 | 908 | if (12 < size && !memcmp(line, "\\ ", 2)) |
8b64647d JH |
909 | offset += linelen(line, size); |
910 | ||
3f40315a LT |
911 | patch->lines_added += added; |
912 | patch->lines_deleted += deleted; | |
c1bb9350 LT |
913 | return offset; |
914 | } | |
915 | ||
19c58fb8 | 916 | static int parse_single_patch(char *line, unsigned long size, struct patch *patch) |
c1bb9350 LT |
917 | { |
918 | unsigned long offset = 0; | |
19c58fb8 | 919 | struct fragment **fragp = &patch->fragments; |
c1bb9350 LT |
920 | |
921 | while (size > 4 && !memcmp(line, "@@ -", 4)) { | |
19c58fb8 LT |
922 | struct fragment *fragment; |
923 | int len; | |
924 | ||
925 | fragment = xmalloc(sizeof(*fragment)); | |
926 | memset(fragment, 0, sizeof(*fragment)); | |
927 | len = parse_fragment(line, size, patch, fragment); | |
c1bb9350 | 928 | if (len <= 0) |
46979f56 | 929 | die("corrupt patch at line %d", linenr); |
c1bb9350 | 930 | |
19c58fb8 LT |
931 | fragment->patch = line; |
932 | fragment->size = len; | |
933 | ||
934 | *fragp = fragment; | |
935 | fragp = &fragment->next; | |
c1bb9350 LT |
936 | |
937 | offset += len; | |
938 | line += len; | |
939 | size -= len; | |
940 | } | |
941 | return offset; | |
942 | } | |
943 | ||
1fea629f LT |
944 | static inline int metadata_changes(struct patch *patch) |
945 | { | |
946 | return patch->is_rename > 0 || | |
947 | patch->is_copy > 0 || | |
948 | patch->is_new > 0 || | |
949 | patch->is_delete || | |
950 | (patch->old_mode && patch->new_mode && | |
951 | patch->old_mode != patch->new_mode); | |
952 | } | |
953 | ||
19c58fb8 | 954 | static int parse_chunk(char *buffer, unsigned long size, struct patch *patch) |
c1bb9350 LT |
955 | { |
956 | int hdrsize, patchsize; | |
19c58fb8 | 957 | int offset = find_header(buffer, size, &hdrsize, patch); |
c1bb9350 LT |
958 | |
959 | if (offset < 0) | |
960 | return offset; | |
c1bb9350 | 961 | |
19c58fb8 | 962 | patchsize = parse_single_patch(buffer + offset + hdrsize, size - offset - hdrsize, patch); |
c1bb9350 | 963 | |
92927ed0 | 964 | if (!patchsize) { |
3200d1ae JH |
965 | static const char *binhdr[] = { |
966 | "Binary files ", | |
967 | "Files ", | |
968 | NULL, | |
969 | }; | |
970 | int i; | |
971 | int hd = hdrsize + offset; | |
972 | unsigned long llen = linelen(buffer + hd, size - hd); | |
973 | ||
974 | if (!memcmp(" differ\n", buffer + hd + llen - 8, 8)) | |
975 | for (i = 0; binhdr[i]; i++) { | |
976 | int len = strlen(binhdr[i]); | |
977 | if (len < size - hd && | |
978 | !memcmp(binhdr[i], buffer + hd, len)) { | |
979 | patch->is_binary = 1; | |
980 | break; | |
981 | } | |
982 | } | |
ff36de08 | 983 | |
92927ed0 | 984 | /* Empty patch cannot be applied if: |
011f4274 JH |
985 | * - it is a binary patch and we do not do binary_replace, or |
986 | * - text patch without metadata change | |
92927ed0 JH |
987 | */ |
988 | if ((apply || check) && | |
011f4274 JH |
989 | (patch->is_binary |
990 | ? !allow_binary_replacement | |
991 | : !metadata_changes(patch))) | |
ff36de08 JH |
992 | die("patch with only garbage at line %d", linenr); |
993 | } | |
1fea629f | 994 | |
c1bb9350 LT |
995 | return offset + hdrsize + patchsize; |
996 | } | |
997 | ||
6da4016a LT |
998 | static const char pluses[] = "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"; |
999 | static const char minuses[]= "----------------------------------------------------------------------"; | |
3f40315a LT |
1000 | |
1001 | static void show_stats(struct patch *patch) | |
1002 | { | |
62917097 | 1003 | const char *prefix = ""; |
03b4538b | 1004 | char *name = patch->new_name; |
22943f1a | 1005 | char *qname = NULL; |
95bedc9e | 1006 | int len, max, add, del, total; |
3f40315a | 1007 | |
5041aa70 | 1008 | if (!name) |
03b4538b | 1009 | name = patch->old_name; |
3f40315a | 1010 | |
22943f1a JH |
1011 | if (0 < (len = quote_c_style(name, NULL, NULL, 0))) { |
1012 | qname = xmalloc(len + 1); | |
1013 | quote_c_style(name, qname, NULL, 0); | |
1014 | name = qname; | |
1015 | } | |
1016 | ||
3f40315a LT |
1017 | /* |
1018 | * "scale" the filename | |
1019 | */ | |
1020 | len = strlen(name); | |
1021 | max = max_len; | |
1022 | if (max > 50) | |
1023 | max = 50; | |
62917097 LT |
1024 | if (len > max) { |
1025 | char *slash; | |
1026 | prefix = "..."; | |
1027 | max -= 3; | |
3f40315a | 1028 | name += len - max; |
62917097 LT |
1029 | slash = strchr(name, '/'); |
1030 | if (slash) | |
1031 | name = slash; | |
1032 | } | |
3f40315a LT |
1033 | len = max; |
1034 | ||
1035 | /* | |
1036 | * scale the add/delete | |
1037 | */ | |
1038 | max = max_change; | |
1039 | if (max + len > 70) | |
1040 | max = 70 - len; | |
95bedc9e LT |
1041 | |
1042 | add = patch->lines_added; | |
1043 | del = patch->lines_deleted; | |
1044 | total = add + del; | |
1045 | ||
69f956e1 SV |
1046 | if (max_change > 0) { |
1047 | total = (total * max + max_change / 2) / max_change; | |
1048 | add = (add * max + max_change / 2) / max_change; | |
1049 | del = total - add; | |
1050 | } | |
ff36de08 JH |
1051 | if (patch->is_binary) |
1052 | printf(" %s%-*s | Bin\n", prefix, len, name); | |
1053 | else | |
1054 | printf(" %s%-*s |%5d %.*s%.*s\n", prefix, | |
1055 | len, name, patch->lines_added + patch->lines_deleted, | |
1056 | add, pluses, del, minuses); | |
22943f1a JH |
1057 | if (qname) |
1058 | free(qname); | |
3f40315a LT |
1059 | } |
1060 | ||
3cca928d LT |
1061 | static int read_old_data(struct stat *st, const char *path, void *buf, unsigned long size) |
1062 | { | |
1063 | int fd; | |
1064 | unsigned long got; | |
1065 | ||
1066 | switch (st->st_mode & S_IFMT) { | |
1067 | case S_IFLNK: | |
1068 | return readlink(path, buf, size); | |
1069 | case S_IFREG: | |
1070 | fd = open(path, O_RDONLY); | |
1071 | if (fd < 0) | |
1072 | return error("unable to open %s", path); | |
1073 | got = 0; | |
1074 | for (;;) { | |
1c15afb9 JH |
1075 | int ret = xread(fd, buf + got, size - got); |
1076 | if (ret <= 0) | |
3cca928d LT |
1077 | break; |
1078 | got += ret; | |
1079 | } | |
1080 | close(fd); | |
1081 | return got; | |
1082 | ||
1083 | default: | |
1084 | return -1; | |
1085 | } | |
1086 | } | |
1087 | ||
1088 | static int find_offset(const char *buf, unsigned long size, const char *fragment, unsigned long fragsize, int line) | |
1089 | { | |
6e7c92a9 LT |
1090 | int i; |
1091 | unsigned long start, backwards, forwards; | |
3cca928d LT |
1092 | |
1093 | if (fragsize > size) | |
1094 | return -1; | |
1095 | ||
1096 | start = 0; | |
1097 | if (line > 1) { | |
3cca928d | 1098 | unsigned long offset = 0; |
6e7c92a9 LT |
1099 | i = line-1; |
1100 | while (offset + fragsize <= size) { | |
3cca928d LT |
1101 | if (buf[offset++] == '\n') { |
1102 | start = offset; | |
6e7c92a9 | 1103 | if (!--i) |
3cca928d LT |
1104 | break; |
1105 | } | |
1106 | } | |
1107 | } | |
1108 | ||
1109 | /* Exact line number? */ | |
1110 | if (!memcmp(buf + start, fragment, fragsize)) | |
1111 | return start; | |
1112 | ||
6e7c92a9 LT |
1113 | /* |
1114 | * There's probably some smart way to do this, but I'll leave | |
1115 | * that to the smart and beautiful people. I'm simple and stupid. | |
1116 | */ | |
1117 | backwards = start; | |
1118 | forwards = start; | |
1119 | for (i = 0; ; i++) { | |
1120 | unsigned long try; | |
1121 | int n; | |
1122 | ||
1123 | /* "backward" */ | |
1124 | if (i & 1) { | |
1125 | if (!backwards) { | |
1126 | if (forwards + fragsize > size) | |
1127 | break; | |
1128 | continue; | |
1129 | } | |
1130 | do { | |
1131 | --backwards; | |
1132 | } while (backwards && buf[backwards-1] != '\n'); | |
1133 | try = backwards; | |
1134 | } else { | |
1135 | while (forwards + fragsize <= size) { | |
1136 | if (buf[forwards++] == '\n') | |
1137 | break; | |
1138 | } | |
1139 | try = forwards; | |
1140 | } | |
1141 | ||
1142 | if (try + fragsize > size) | |
1143 | continue; | |
1144 | if (memcmp(buf + try, fragment, fragsize)) | |
1145 | continue; | |
1146 | n = (i >> 1)+1; | |
1147 | if (i & 1) | |
1148 | n = -n; | |
6e7c92a9 LT |
1149 | return try; |
1150 | } | |
1151 | ||
3cca928d LT |
1152 | /* |
1153 | * We should start searching forward and backward. | |
1154 | */ | |
1155 | return -1; | |
1156 | } | |
1157 | ||
6e7c92a9 LT |
1158 | struct buffer_desc { |
1159 | char *buffer; | |
1160 | unsigned long size; | |
1161 | unsigned long alloc; | |
1162 | }; | |
1163 | ||
b5767dd6 JH |
1164 | static int apply_line(char *output, const char *patch, int plen) |
1165 | { | |
1166 | /* plen is number of bytes to be copied from patch, | |
1167 | * starting at patch+1 (patch[0] is '+'). Typically | |
1168 | * patch[plen] is '\n'. | |
1169 | */ | |
1170 | int add_nl_to_tail = 0; | |
2ae1c53b | 1171 | if ((new_whitespace == strip_whitespace) && |
b5767dd6 JH |
1172 | 1 < plen && isspace(patch[plen-1])) { |
1173 | if (patch[plen] == '\n') | |
1174 | add_nl_to_tail = 1; | |
1175 | plen--; | |
1176 | while (0 < plen && isspace(patch[plen])) | |
1177 | plen--; | |
fc96b7c9 | 1178 | applied_after_stripping++; |
b5767dd6 JH |
1179 | } |
1180 | memcpy(output, patch + 1, plen); | |
1181 | if (add_nl_to_tail) | |
1182 | output[plen++] = '\n'; | |
1183 | return plen; | |
1184 | } | |
1185 | ||
6e7c92a9 | 1186 | static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag) |
3cca928d | 1187 | { |
6e7c92a9 | 1188 | char *buf = desc->buffer; |
3cca928d LT |
1189 | const char *patch = frag->patch; |
1190 | int offset, size = frag->size; | |
1191 | char *old = xmalloc(size); | |
1192 | char *new = xmalloc(size); | |
1193 | int oldsize = 0, newsize = 0; | |
1194 | ||
1195 | while (size > 0) { | |
1196 | int len = linelen(patch, size); | |
1197 | int plen; | |
1198 | ||
1199 | if (!len) | |
1200 | break; | |
1201 | ||
1202 | /* | |
1203 | * "plen" is how much of the line we should use for | |
1204 | * the actual patch data. Normally we just remove the | |
1205 | * first character on the line, but if the line is | |
1206 | * followed by "\ No newline", then we also remove the | |
1207 | * last one (which is the newline, of course). | |
1208 | */ | |
1209 | plen = len-1; | |
8b64647d | 1210 | if (len < size && patch[len] == '\\') |
3cca928d LT |
1211 | plen--; |
1212 | switch (*patch) { | |
1213 | case ' ': | |
1214 | case '-': | |
1215 | memcpy(old + oldsize, patch + 1, plen); | |
1216 | oldsize += plen; | |
1217 | if (*patch == '-') | |
1218 | break; | |
1219 | /* Fall-through for ' ' */ | |
1220 | case '+': | |
b5767dd6 JH |
1221 | if (*patch != '+' || !no_add) |
1222 | newsize += apply_line(new + newsize, patch, | |
1223 | plen); | |
3cca928d LT |
1224 | break; |
1225 | case '@': case '\\': | |
1226 | /* Ignore it, we already handled it */ | |
1227 | break; | |
1228 | default: | |
1229 | return -1; | |
1230 | } | |
1231 | patch += len; | |
1232 | size -= len; | |
1233 | } | |
1234 | ||
5b5d4d9e JS |
1235 | #ifdef NO_ACCURATE_DIFF |
1236 | if (oldsize > 0 && old[oldsize - 1] == '\n' && | |
1237 | newsize > 0 && new[newsize - 1] == '\n') { | |
1238 | oldsize--; | |
1239 | newsize--; | |
1240 | } | |
1241 | #endif | |
1242 | ||
6e7c92a9 | 1243 | offset = find_offset(buf, desc->size, old, oldsize, frag->newpos); |
3cca928d | 1244 | if (offset >= 0) { |
6e7c92a9 LT |
1245 | int diff = newsize - oldsize; |
1246 | unsigned long size = desc->size + diff; | |
1247 | unsigned long alloc = desc->alloc; | |
1248 | ||
1249 | if (size > alloc) { | |
1250 | alloc = size + 8192; | |
1251 | desc->alloc = alloc; | |
1252 | buf = xrealloc(buf, alloc); | |
1253 | desc->buffer = buf; | |
1254 | } | |
1255 | desc->size = size; | |
1256 | memmove(buf + offset + newsize, buf + offset + oldsize, size - offset - newsize); | |
1257 | memcpy(buf + offset, new, newsize); | |
3cca928d LT |
1258 | offset = 0; |
1259 | } | |
1260 | ||
1261 | free(old); | |
1262 | free(new); | |
1263 | return offset; | |
1264 | } | |
1265 | ||
6e7c92a9 | 1266 | static int apply_fragments(struct buffer_desc *desc, struct patch *patch) |
3cca928d LT |
1267 | { |
1268 | struct fragment *frag = patch->fragments; | |
011f4274 JH |
1269 | const char *name = patch->old_name ? patch->old_name : patch->new_name; |
1270 | ||
1271 | if (patch->is_binary) { | |
1272 | unsigned char sha1[20]; | |
1273 | ||
1274 | if (!allow_binary_replacement) | |
1275 | return error("cannot apply binary patch to '%s' " | |
1276 | "without --allow-binary-replacement", | |
1277 | name); | |
1278 | ||
1279 | /* For safety, we require patch index line to contain | |
1280 | * full 40-byte textual SHA1 for old and new, at least for now. | |
1281 | */ | |
1282 | if (strlen(patch->old_sha1_prefix) != 40 || | |
1283 | strlen(patch->new_sha1_prefix) != 40 || | |
1284 | get_sha1_hex(patch->old_sha1_prefix, sha1) || | |
1285 | get_sha1_hex(patch->new_sha1_prefix, sha1)) | |
1286 | return error("cannot apply binary patch to '%s' " | |
1287 | "without full index line", name); | |
1288 | ||
1289 | if (patch->old_name) { | |
1290 | unsigned char hdr[50]; | |
1291 | int hdrlen; | |
1292 | ||
1293 | /* See if the old one matches what the patch | |
1294 | * applies to. | |
1295 | */ | |
1296 | write_sha1_file_prepare(desc->buffer, desc->size, | |
1297 | "blob", sha1, hdr, &hdrlen); | |
1298 | if (strcmp(sha1_to_hex(sha1), patch->old_sha1_prefix)) | |
1299 | return error("the patch applies to '%s' (%s), " | |
1300 | "which does not match the " | |
1301 | "current contents.", | |
1302 | name, sha1_to_hex(sha1)); | |
1303 | } | |
1304 | else { | |
1305 | /* Otherwise, the old one must be empty. */ | |
1306 | if (desc->size) | |
1307 | return error("the patch applies to an empty " | |
1308 | "'%s' but it is not empty", name); | |
1309 | } | |
1310 | ||
1311 | /* For now, we do not record post-image data in the patch, | |
1312 | * and require the object already present in the recipient's | |
1313 | * object database. | |
1314 | */ | |
1315 | if (desc->buffer) { | |
1316 | free(desc->buffer); | |
1317 | desc->alloc = desc->size = 0; | |
1318 | } | |
1319 | get_sha1_hex(patch->new_sha1_prefix, sha1); | |
1320 | ||
1321 | if (memcmp(sha1, null_sha1, 20)) { | |
1322 | char type[10]; | |
1323 | unsigned long size; | |
1324 | ||
1325 | desc->buffer = read_sha1_file(sha1, type, &size); | |
1326 | if (!desc->buffer) | |
1327 | return error("the necessary postimage %s for " | |
1328 | "'%s' does not exist", | |
1329 | patch->new_sha1_prefix, name); | |
1330 | desc->alloc = desc->size = size; | |
1331 | } | |
1332 | ||
1333 | return 0; | |
1334 | } | |
3cca928d LT |
1335 | |
1336 | while (frag) { | |
6e7c92a9 | 1337 | if (apply_one_fragment(desc, frag) < 0) |
011f4274 JH |
1338 | return error("patch failed: %s:%ld", |
1339 | name, frag->oldpos); | |
3cca928d LT |
1340 | frag = frag->next; |
1341 | } | |
30996652 | 1342 | return 0; |
3cca928d LT |
1343 | } |
1344 | ||
1345 | static int apply_data(struct patch *patch, struct stat *st) | |
1346 | { | |
6e7c92a9 LT |
1347 | char *buf; |
1348 | unsigned long size, alloc; | |
1349 | struct buffer_desc desc; | |
3cca928d | 1350 | |
30996652 LT |
1351 | size = 0; |
1352 | alloc = 0; | |
1353 | buf = NULL; | |
1354 | if (patch->old_name) { | |
1355 | size = st->st_size; | |
1356 | alloc = size + 8192; | |
1357 | buf = xmalloc(alloc); | |
1358 | if (read_old_data(st, patch->old_name, buf, alloc) != size) | |
1359 | return error("read of %s failed", patch->old_name); | |
1360 | } | |
6e7c92a9 LT |
1361 | |
1362 | desc.size = size; | |
1363 | desc.alloc = alloc; | |
1364 | desc.buffer = buf; | |
1365 | if (apply_fragments(&desc, patch) < 0) | |
3cca928d | 1366 | return -1; |
6e7c92a9 LT |
1367 | patch->result = desc.buffer; |
1368 | patch->resultsize = desc.size; | |
5aa7d94c LT |
1369 | |
1370 | if (patch->is_delete && patch->resultsize) | |
1371 | return error("removal patch leaves file contents"); | |
1372 | ||
3cca928d LT |
1373 | return 0; |
1374 | } | |
1375 | ||
a577284a | 1376 | static int check_patch(struct patch *patch) |
fab2c257 | 1377 | { |
a577284a | 1378 | struct stat st; |
fab2c257 LT |
1379 | const char *old_name = patch->old_name; |
1380 | const char *new_name = patch->new_name; | |
011f4274 | 1381 | const char *name = old_name ? old_name : new_name; |
fab2c257 LT |
1382 | |
1383 | if (old_name) { | |
a577284a | 1384 | int changed; |
56d33b11 | 1385 | int stat_ret = lstat(old_name, &st); |
a577284a | 1386 | |
3cca928d LT |
1387 | if (check_index) { |
1388 | int pos = cache_name_pos(old_name, strlen(old_name)); | |
1389 | if (pos < 0) | |
56d33b11 JH |
1390 | return error("%s: does not exist in index", |
1391 | old_name); | |
1392 | if (stat_ret < 0) { | |
1393 | struct checkout costate; | |
1394 | if (errno != ENOENT) | |
1395 | return error("%s: %s", old_name, | |
1396 | strerror(errno)); | |
1397 | /* checkout */ | |
1398 | costate.base_dir = ""; | |
1399 | costate.base_dir_len = 0; | |
1400 | costate.force = 0; | |
1401 | costate.quiet = 0; | |
1402 | costate.not_new = 0; | |
1403 | costate.refresh_cache = 1; | |
1404 | if (checkout_entry(active_cache[pos], | |
1405 | &costate) || | |
1406 | lstat(old_name, &st)) | |
1407 | return -1; | |
1408 | } | |
1409 | ||
5f73076c | 1410 | changed = ce_match_stat(active_cache[pos], &st, 1); |
3cca928d | 1411 | if (changed) |
56d33b11 JH |
1412 | return error("%s: does not match index", |
1413 | old_name); | |
3cca928d | 1414 | } |
56d33b11 JH |
1415 | else if (stat_ret < 0) |
1416 | return error("%s: %s", old_name, strerror(errno)); | |
1417 | ||
3cca928d LT |
1418 | if (patch->is_new < 0) |
1419 | patch->is_new = 0; | |
de4971b5 | 1420 | st.st_mode = ntohl(create_ce_mode(st.st_mode)); |
a577284a LT |
1421 | if (!patch->old_mode) |
1422 | patch->old_mode = st.st_mode; | |
3cca928d LT |
1423 | if ((st.st_mode ^ patch->old_mode) & S_IFMT) |
1424 | return error("%s: wrong type", old_name); | |
1425 | if (st.st_mode != patch->old_mode) | |
1426 | fprintf(stderr, "warning: %s has type %o, expected %o\n", | |
1427 | old_name, st.st_mode, patch->old_mode); | |
fab2c257 | 1428 | } |
a577284a | 1429 | |
fab2c257 | 1430 | if (new_name && (patch->is_new | patch->is_rename | patch->is_copy)) { |
3cca928d | 1431 | if (check_index && cache_name_pos(new_name, strlen(new_name)) >= 0) |
a577284a LT |
1432 | return error("%s: already exists in index", new_name); |
1433 | if (!lstat(new_name, &st)) | |
1434 | return error("%s: already exists in working directory", new_name); | |
1435 | if (errno != ENOENT) | |
1436 | return error("%s: %s", new_name, strerror(errno)); | |
35cc4bcd JS |
1437 | if (!patch->new_mode) { |
1438 | if (patch->is_new) | |
1439 | patch->new_mode = S_IFREG | 0644; | |
1440 | else | |
1441 | patch->new_mode = patch->old_mode; | |
1442 | } | |
fab2c257 | 1443 | } |
3cca928d LT |
1444 | |
1445 | if (new_name && old_name) { | |
1446 | int same = !strcmp(old_name, new_name); | |
1447 | if (!patch->new_mode) | |
1448 | patch->new_mode = patch->old_mode; | |
1449 | if ((patch->old_mode ^ patch->new_mode) & S_IFMT) | |
1450 | return error("new mode (%o) of %s does not match old mode (%o)%s%s", | |
1451 | patch->new_mode, new_name, patch->old_mode, | |
1452 | same ? "" : " of ", same ? "" : old_name); | |
1453 | } | |
1454 | ||
1455 | if (apply_data(patch, &st) < 0) | |
011f4274 | 1456 | return error("%s: patch does not apply", name); |
a577284a | 1457 | return 0; |
fab2c257 LT |
1458 | } |
1459 | ||
a577284a | 1460 | static int check_patch_list(struct patch *patch) |
19c58fb8 | 1461 | { |
a577284a LT |
1462 | int error = 0; |
1463 | ||
1464 | for (;patch ; patch = patch->next) | |
1465 | error |= check_patch(patch); | |
1466 | return error; | |
1467 | } | |
1468 | ||
2cf67f1e JH |
1469 | static inline int is_null_sha1(const unsigned char *sha1) |
1470 | { | |
1471 | return !memcmp(sha1, null_sha1, 20); | |
1472 | } | |
1473 | ||
1474 | static void show_index_list(struct patch *list) | |
1475 | { | |
1476 | struct patch *patch; | |
1477 | ||
1478 | /* Once we start supporting the reverse patch, it may be | |
1479 | * worth showing the new sha1 prefix, but until then... | |
1480 | */ | |
1481 | for (patch = list; patch; patch = patch->next) { | |
1482 | const unsigned char *sha1_ptr; | |
1483 | unsigned char sha1[20]; | |
1484 | const char *name; | |
1485 | ||
1486 | name = patch->old_name ? patch->old_name : patch->new_name; | |
1487 | if (patch->is_new) | |
1488 | sha1_ptr = null_sha1; | |
1489 | else if (get_sha1(patch->old_sha1_prefix, sha1)) | |
1490 | die("sha1 information is lacking or useless (%s).", | |
1491 | name); | |
1492 | else | |
1493 | sha1_ptr = sha1; | |
22943f1a JH |
1494 | |
1495 | printf("%06o %s ",patch->old_mode, sha1_to_hex(sha1_ptr)); | |
1496 | if (line_termination && quote_c_style(name, NULL, NULL, 0)) | |
1497 | quote_c_style(name, NULL, stdout, 0); | |
1498 | else | |
1499 | fputs(name, stdout); | |
1500 | putchar(line_termination); | |
2cf67f1e JH |
1501 | } |
1502 | } | |
1503 | ||
a577284a LT |
1504 | static void stat_patch_list(struct patch *patch) |
1505 | { | |
1506 | int files, adds, dels; | |
1507 | ||
1508 | for (files = adds = dels = 0 ; patch ; patch = patch->next) { | |
1509 | files++; | |
1510 | adds += patch->lines_added; | |
1511 | dels += patch->lines_deleted; | |
1512 | show_stats(patch); | |
1513 | } | |
1514 | ||
1515 | printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files, adds, dels); | |
3f40315a LT |
1516 | } |
1517 | ||
7d8b7c21 JH |
1518 | static void numstat_patch_list(struct patch *patch) |
1519 | { | |
1520 | for ( ; patch; patch = patch->next) { | |
1521 | const char *name; | |
1522 | name = patch->old_name ? patch->old_name : patch->new_name; | |
1523 | printf("%d\t%d\t", patch->lines_added, patch->lines_deleted); | |
1524 | if (line_termination && quote_c_style(name, NULL, NULL, 0)) | |
1525 | quote_c_style(name, NULL, stdout, 0); | |
1526 | else | |
1527 | fputs(name, stdout); | |
1528 | putchar('\n'); | |
1529 | } | |
1530 | } | |
1531 | ||
96c912a4 JH |
1532 | static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name) |
1533 | { | |
1534 | if (mode) | |
1535 | printf(" %s mode %06o %s\n", newdelete, mode, name); | |
1536 | else | |
1537 | printf(" %s %s\n", newdelete, name); | |
1538 | } | |
1539 | ||
1540 | static void show_mode_change(struct patch *p, int show_name) | |
1541 | { | |
1542 | if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) { | |
1543 | if (show_name) | |
1544 | printf(" mode change %06o => %06o %s\n", | |
1545 | p->old_mode, p->new_mode, p->new_name); | |
1546 | else | |
1547 | printf(" mode change %06o => %06o\n", | |
1548 | p->old_mode, p->new_mode); | |
1549 | } | |
1550 | } | |
1551 | ||
1552 | static void show_rename_copy(struct patch *p) | |
1553 | { | |
1554 | const char *renamecopy = p->is_rename ? "rename" : "copy"; | |
1555 | const char *old, *new; | |
1556 | ||
1557 | /* Find common prefix */ | |
1558 | old = p->old_name; | |
1559 | new = p->new_name; | |
1560 | while (1) { | |
1561 | const char *slash_old, *slash_new; | |
1562 | slash_old = strchr(old, '/'); | |
1563 | slash_new = strchr(new, '/'); | |
1564 | if (!slash_old || | |
1565 | !slash_new || | |
1566 | slash_old - old != slash_new - new || | |
1567 | memcmp(old, new, slash_new - new)) | |
1568 | break; | |
1569 | old = slash_old + 1; | |
1570 | new = slash_new + 1; | |
1571 | } | |
1572 | /* p->old_name thru old is the common prefix, and old and new | |
1573 | * through the end of names are renames | |
1574 | */ | |
1575 | if (old != p->old_name) | |
1576 | printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy, | |
e30e814d | 1577 | (int)(old - p->old_name), p->old_name, |
96c912a4 JH |
1578 | old, new, p->score); |
1579 | else | |
1580 | printf(" %s %s => %s (%d%%)\n", renamecopy, | |
1581 | p->old_name, p->new_name, p->score); | |
1582 | show_mode_change(p, 0); | |
1583 | } | |
1584 | ||
1585 | static void summary_patch_list(struct patch *patch) | |
1586 | { | |
1587 | struct patch *p; | |
1588 | ||
1589 | for (p = patch; p; p = p->next) { | |
1590 | if (p->is_new) | |
1591 | show_file_mode_name("create", p->new_mode, p->new_name); | |
1592 | else if (p->is_delete) | |
1593 | show_file_mode_name("delete", p->old_mode, p->old_name); | |
1594 | else { | |
1595 | if (p->is_rename || p->is_copy) | |
1596 | show_rename_copy(p); | |
1597 | else { | |
1598 | if (p->score) { | |
1599 | printf(" rewrite %s (%d%%)\n", | |
1600 | p->new_name, p->score); | |
1601 | show_mode_change(p, 0); | |
1602 | } | |
1603 | else | |
1604 | show_mode_change(p, 1); | |
1605 | } | |
1606 | } | |
1607 | } | |
1608 | } | |
1609 | ||
3f40315a LT |
1610 | static void patch_stats(struct patch *patch) |
1611 | { | |
1612 | int lines = patch->lines_added + patch->lines_deleted; | |
1613 | ||
1614 | if (lines > max_change) | |
1615 | max_change = lines; | |
1616 | if (patch->old_name) { | |
22943f1a JH |
1617 | int len = quote_c_style(patch->old_name, NULL, NULL, 0); |
1618 | if (!len) | |
1619 | len = strlen(patch->old_name); | |
3f40315a LT |
1620 | if (len > max_len) |
1621 | max_len = len; | |
1622 | } | |
1623 | if (patch->new_name) { | |
22943f1a JH |
1624 | int len = quote_c_style(patch->new_name, NULL, NULL, 0); |
1625 | if (!len) | |
1626 | len = strlen(patch->new_name); | |
3f40315a LT |
1627 | if (len > max_len) |
1628 | max_len = len; | |
1629 | } | |
19c58fb8 LT |
1630 | } |
1631 | ||
5aa7d94c LT |
1632 | static void remove_file(struct patch *patch) |
1633 | { | |
1634 | if (write_index) { | |
1635 | if (remove_file_from_cache(patch->old_name) < 0) | |
1636 | die("unable to remove %s from index", patch->old_name); | |
1637 | } | |
1638 | unlink(patch->old_name); | |
1639 | } | |
1640 | ||
1641 | static void add_index_file(const char *path, unsigned mode, void *buf, unsigned long size) | |
1642 | { | |
1643 | struct stat st; | |
1644 | struct cache_entry *ce; | |
1645 | int namelen = strlen(path); | |
1646 | unsigned ce_size = cache_entry_size(namelen); | |
1647 | ||
1648 | if (!write_index) | |
1649 | return; | |
1650 | ||
1651 | ce = xmalloc(ce_size); | |
1652 | memset(ce, 0, ce_size); | |
1653 | memcpy(ce->name, path, namelen); | |
1654 | ce->ce_mode = create_ce_mode(mode); | |
1655 | ce->ce_flags = htons(namelen); | |
1656 | if (lstat(path, &st) < 0) | |
1657 | die("unable to stat newly created file %s", path); | |
1658 | fill_stat_cache_info(ce, &st); | |
1659 | if (write_sha1_file(buf, size, "blob", ce->sha1) < 0) | |
1660 | die("unable to create backing store for newly created file %s", path); | |
1661 | if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0) | |
1662 | die("unable to add cache entry for %s", path); | |
1663 | } | |
1664 | ||
1b668341 LT |
1665 | static int try_create_file(const char *path, unsigned int mode, const char *buf, unsigned long size) |
1666 | { | |
1667 | int fd; | |
1668 | ||
1669 | if (S_ISLNK(mode)) | |
1670 | return symlink(buf, path); | |
781411ed | 1671 | fd = open(path, O_CREAT | O_EXCL | O_WRONLY, (mode & 0100) ? 0777 : 0666); |
1b668341 LT |
1672 | if (fd < 0) |
1673 | return -1; | |
1674 | while (size) { | |
1c15afb9 JH |
1675 | int written = xwrite(fd, buf, size); |
1676 | if (written < 0) | |
1b668341 | 1677 | die("writing file %s: %s", path, strerror(errno)); |
1b668341 LT |
1678 | if (!written) |
1679 | die("out of space writing file %s", path); | |
1680 | buf += written; | |
1681 | size -= written; | |
1682 | } | |
1683 | if (close(fd) < 0) | |
1684 | die("closing file %s: %s", path, strerror(errno)); | |
1685 | return 0; | |
1686 | } | |
1687 | ||
5c8af185 LT |
1688 | /* |
1689 | * We optimistically assume that the directories exist, | |
1690 | * which is true 99% of the time anyway. If they don't, | |
1691 | * we create them and try again. | |
1692 | */ | |
8361e1d4 | 1693 | static void create_one_file(char *path, unsigned mode, const char *buf, unsigned long size) |
5c8af185 | 1694 | { |
1b668341 LT |
1695 | if (!try_create_file(path, mode, buf, size)) |
1696 | return; | |
5c8af185 | 1697 | |
1b668341 | 1698 | if (errno == ENOENT) { |
8361e1d4 JR |
1699 | if (safe_create_leading_directories(path)) |
1700 | return; | |
1b668341 LT |
1701 | if (!try_create_file(path, mode, buf, size)) |
1702 | return; | |
5c8af185 | 1703 | } |
5c8af185 | 1704 | |
1b668341 LT |
1705 | if (errno == EEXIST) { |
1706 | unsigned int nr = getpid(); | |
5c8af185 | 1707 | |
1b668341 LT |
1708 | for (;;) { |
1709 | const char *newpath; | |
1710 | newpath = mkpath("%s~%u", path, nr); | |
1711 | if (!try_create_file(newpath, mode, buf, size)) { | |
1712 | if (!rename(newpath, path)) | |
1713 | return; | |
1714 | unlink(newpath); | |
1715 | break; | |
1716 | } | |
1717 | if (errno != EEXIST) | |
1718 | break; | |
d9e08be9 AR |
1719 | ++nr; |
1720 | } | |
5c8af185 | 1721 | } |
1b668341 | 1722 | die("unable to write file %s mode %o", path, mode); |
5c8af185 LT |
1723 | } |
1724 | ||
5aa7d94c LT |
1725 | static void create_file(struct patch *patch) |
1726 | { | |
8361e1d4 | 1727 | char *path = patch->new_name; |
5aa7d94c LT |
1728 | unsigned mode = patch->new_mode; |
1729 | unsigned long size = patch->resultsize; | |
1730 | char *buf = patch->result; | |
1731 | ||
1732 | if (!mode) | |
1733 | mode = S_IFREG | 0644; | |
1b668341 LT |
1734 | create_one_file(path, mode, buf, size); |
1735 | add_index_file(path, mode, buf, size); | |
5aa7d94c LT |
1736 | } |
1737 | ||
1738 | static void write_out_one_result(struct patch *patch) | |
1739 | { | |
1740 | if (patch->is_delete > 0) { | |
1741 | remove_file(patch); | |
1742 | return; | |
1743 | } | |
1744 | if (patch->is_new > 0 || patch->is_copy) { | |
1745 | create_file(patch); | |
1746 | return; | |
1747 | } | |
1748 | /* | |
1749 | * Rename or modification boils down to the same | |
1750 | * thing: remove the old, write the new | |
1751 | */ | |
1752 | remove_file(patch); | |
1753 | create_file(patch); | |
1754 | } | |
1755 | ||
d854f783 | 1756 | static void write_out_results(struct patch *list, int skipped_patch) |
5aa7d94c | 1757 | { |
d854f783 | 1758 | if (!list && !skipped_patch) |
f7b79707 LT |
1759 | die("No changes"); |
1760 | ||
5aa7d94c LT |
1761 | while (list) { |
1762 | write_out_one_result(list); | |
1763 | list = list->next; | |
1764 | } | |
1765 | } | |
1766 | ||
1767 | static struct cache_file cache_file; | |
1768 | ||
d854f783 JH |
1769 | static struct excludes { |
1770 | struct excludes *next; | |
1771 | const char *path; | |
1772 | } *excludes; | |
1773 | ||
1774 | static int use_patch(struct patch *p) | |
1775 | { | |
c7c81b3a | 1776 | const char *pathname = p->new_name ? p->new_name : p->old_name; |
d854f783 JH |
1777 | struct excludes *x = excludes; |
1778 | while (x) { | |
1779 | if (fnmatch(x->path, pathname, 0) == 0) | |
1780 | return 0; | |
1781 | x = x->next; | |
1782 | } | |
edf2e370 JH |
1783 | if (0 < prefix_length) { |
1784 | int pathlen = strlen(pathname); | |
1785 | if (pathlen <= prefix_length || | |
1786 | memcmp(prefix, pathname, prefix_length)) | |
1787 | return 0; | |
1788 | } | |
d854f783 JH |
1789 | return 1; |
1790 | } | |
1791 | ||
b5767dd6 | 1792 | static int apply_patch(int fd, const char *filename) |
c1bb9350 | 1793 | { |
5aa7d94c | 1794 | int newfd; |
c1bb9350 LT |
1795 | unsigned long offset, size; |
1796 | char *buffer = read_patch_file(fd, &size); | |
19c58fb8 | 1797 | struct patch *list = NULL, **listp = &list; |
d854f783 | 1798 | int skipped_patch = 0; |
c1bb9350 | 1799 | |
b5767dd6 | 1800 | patch_input_file = filename; |
c1bb9350 LT |
1801 | if (!buffer) |
1802 | return -1; | |
1803 | offset = 0; | |
1804 | while (size > 0) { | |
19c58fb8 LT |
1805 | struct patch *patch; |
1806 | int nr; | |
1807 | ||
1808 | patch = xmalloc(sizeof(*patch)); | |
1809 | memset(patch, 0, sizeof(*patch)); | |
1810 | nr = parse_chunk(buffer + offset, size, patch); | |
c1bb9350 LT |
1811 | if (nr < 0) |
1812 | break; | |
d854f783 JH |
1813 | if (use_patch(patch)) { |
1814 | patch_stats(patch); | |
1815 | *listp = patch; | |
1816 | listp = &patch->next; | |
1817 | } else { | |
1818 | /* perhaps free it a bit better? */ | |
1819 | free(patch); | |
1820 | skipped_patch++; | |
1821 | } | |
c1bb9350 LT |
1822 | offset += nr; |
1823 | size -= nr; | |
1824 | } | |
19c58fb8 | 1825 | |
5aa7d94c | 1826 | newfd = -1; |
b5767dd6 JH |
1827 | if (whitespace_error && (new_whitespace == error_on_whitespace)) |
1828 | apply = 0; | |
1829 | ||
5aa7d94c LT |
1830 | write_index = check_index && apply; |
1831 | if (write_index) | |
1832 | newfd = hold_index_file_for_update(&cache_file, get_index_file()); | |
1833 | if (check_index) { | |
1834 | if (read_cache() < 0) | |
1835 | die("unable to read index file"); | |
1836 | } | |
1837 | ||
a577284a LT |
1838 | if ((check || apply) && check_patch_list(list) < 0) |
1839 | exit(1); | |
1840 | ||
5aa7d94c | 1841 | if (apply) |
d854f783 | 1842 | write_out_results(list, skipped_patch); |
5aa7d94c LT |
1843 | |
1844 | if (write_index) { | |
1845 | if (write_cache(newfd, active_cache, active_nr) || | |
1846 | commit_index_file(&cache_file)) | |
1847 | die("Unable to write new cachefile"); | |
1848 | } | |
1849 | ||
2cf67f1e JH |
1850 | if (show_index_info) |
1851 | show_index_list(list); | |
1852 | ||
a577284a LT |
1853 | if (diffstat) |
1854 | stat_patch_list(list); | |
19c58fb8 | 1855 | |
7d8b7c21 JH |
1856 | if (numstat) |
1857 | numstat_patch_list(list); | |
1858 | ||
96c912a4 JH |
1859 | if (summary) |
1860 | summary_patch_list(list); | |
1861 | ||
c1bb9350 LT |
1862 | free(buffer); |
1863 | return 0; | |
1864 | } | |
1865 | ||
2ae1c53b JH |
1866 | static int git_apply_config(const char *var, const char *value) |
1867 | { | |
1868 | if (!strcmp(var, "apply.whitespace")) { | |
1869 | apply_default_whitespace = strdup(value); | |
1870 | return 0; | |
1871 | } | |
1872 | return git_default_config(var, value); | |
1873 | } | |
1874 | ||
1875 | ||
c1bb9350 LT |
1876 | int main(int argc, char **argv) |
1877 | { | |
1878 | int i; | |
4dfdbe10 | 1879 | int read_stdin = 1; |
2ae1c53b | 1880 | const char *whitespace_option = NULL; |
c1bb9350 | 1881 | |
c1bb9350 LT |
1882 | for (i = 1; i < argc; i++) { |
1883 | const char *arg = argv[i]; | |
1884 | int fd; | |
1885 | ||
1886 | if (!strcmp(arg, "-")) { | |
b5767dd6 | 1887 | apply_patch(0, "<stdin>"); |
4dfdbe10 | 1888 | read_stdin = 0; |
c1bb9350 LT |
1889 | continue; |
1890 | } | |
d854f783 JH |
1891 | if (!strncmp(arg, "--exclude=", 10)) { |
1892 | struct excludes *x = xmalloc(sizeof(*x)); | |
1893 | x->path = arg + 10; | |
1894 | x->next = excludes; | |
1895 | excludes = x; | |
1896 | continue; | |
1897 | } | |
e36f8b60 DB |
1898 | if (!strncmp(arg, "-p", 2)) { |
1899 | p_value = atoi(arg + 2); | |
1900 | continue; | |
1901 | } | |
cb93c193 JH |
1902 | if (!strcmp(arg, "--no-add")) { |
1903 | no_add = 1; | |
1904 | continue; | |
1905 | } | |
fab2c257 | 1906 | if (!strcmp(arg, "--stat")) { |
a577284a | 1907 | apply = 0; |
fab2c257 LT |
1908 | diffstat = 1; |
1909 | continue; | |
1910 | } | |
011f4274 JH |
1911 | if (!strcmp(arg, "--allow-binary-replacement")) { |
1912 | allow_binary_replacement = 1; | |
1913 | continue; | |
1914 | } | |
7d8b7c21 JH |
1915 | if (!strcmp(arg, "--numstat")) { |
1916 | apply = 0; | |
1917 | numstat = 1; | |
1918 | continue; | |
1919 | } | |
96c912a4 JH |
1920 | if (!strcmp(arg, "--summary")) { |
1921 | apply = 0; | |
1922 | summary = 1; | |
1923 | continue; | |
1924 | } | |
a577284a LT |
1925 | if (!strcmp(arg, "--check")) { |
1926 | apply = 0; | |
1927 | check = 1; | |
1928 | continue; | |
1929 | } | |
3cca928d LT |
1930 | if (!strcmp(arg, "--index")) { |
1931 | check_index = 1; | |
1932 | continue; | |
1933 | } | |
aefa4a5b LT |
1934 | if (!strcmp(arg, "--apply")) { |
1935 | apply = 1; | |
1936 | continue; | |
1937 | } | |
22943f1a | 1938 | if (!strcmp(arg, "--index-info")) { |
2cf67f1e JH |
1939 | apply = 0; |
1940 | show_index_info = 1; | |
1941 | continue; | |
1942 | } | |
22943f1a JH |
1943 | if (!strcmp(arg, "-z")) { |
1944 | line_termination = 0; | |
1945 | continue; | |
1946 | } | |
19bfcd5a | 1947 | if (!strncmp(arg, "--whitespace=", 13)) { |
2ae1c53b JH |
1948 | whitespace_option = arg + 13; |
1949 | parse_whitespace_option(arg + 13); | |
1950 | continue; | |
19bfcd5a | 1951 | } |
edf2e370 JH |
1952 | |
1953 | if (check_index && prefix_length < 0) { | |
1954 | prefix = setup_git_directory(); | |
1955 | prefix_length = prefix ? strlen(prefix) : 0; | |
2ae1c53b JH |
1956 | git_config(git_apply_config); |
1957 | if (!whitespace_option && apply_default_whitespace) | |
1958 | parse_whitespace_option(apply_default_whitespace); | |
edf2e370 JH |
1959 | } |
1960 | if (0 < prefix_length) | |
1961 | arg = prefix_filename(prefix, prefix_length, arg); | |
1962 | ||
c1bb9350 LT |
1963 | fd = open(arg, O_RDONLY); |
1964 | if (fd < 0) | |
1965 | usage(apply_usage); | |
4dfdbe10 | 1966 | read_stdin = 0; |
f21d6726 | 1967 | set_default_whitespace_mode(whitespace_option); |
b5767dd6 | 1968 | apply_patch(fd, arg); |
c1bb9350 LT |
1969 | close(fd); |
1970 | } | |
f21d6726 | 1971 | set_default_whitespace_mode(whitespace_option); |
4dfdbe10 | 1972 | if (read_stdin) |
b5767dd6 | 1973 | apply_patch(0, "<stdin>"); |
fc96b7c9 JH |
1974 | if (whitespace_error) { |
1975 | if (squelch_whitespace_errors && | |
1976 | squelch_whitespace_errors < whitespace_error) { | |
1977 | int squelched = | |
1978 | whitespace_error - squelch_whitespace_errors; | |
1979 | fprintf(stderr, "warning: squelched %d whitespace error%s\n", | |
1980 | squelched, | |
1981 | squelched == 1 ? "" : "s"); | |
1982 | } | |
1983 | if (new_whitespace == error_on_whitespace) | |
1984 | die("%d line%s add%s trailing whitespaces.", | |
1985 | whitespace_error, | |
1986 | whitespace_error == 1 ? "" : "s", | |
1987 | whitespace_error == 1 ? "s" : ""); | |
1988 | if (applied_after_stripping) | |
1989 | fprintf(stderr, "warning: %d line%s applied after" | |
1990 | " stripping trailing whitespaces.\n", | |
1991 | applied_after_stripping, | |
1992 | applied_after_stripping == 1 ? "" : "s"); | |
1993 | else if (whitespace_error) | |
1994 | fprintf(stderr, "warning: %d line%s add%s trailing" | |
1995 | " whitespaces.\n", | |
1996 | whitespace_error, | |
1997 | whitespace_error == 1 ? "" : "s", | |
1998 | whitespace_error == 1 ? "s" : ""); | |
1999 | } | |
c1bb9350 LT |
2000 | return 0; |
2001 | } |