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Commit | Line | Data |
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c1bb9350 LT |
1 | /* |
2 | * apply.c | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | * | |
6 | * This applies patches on top of some (arbitrary) version of the SCM. | |
7 | * | |
c1bb9350 | 8 | */ |
c1bb9350 | 9 | #include "cache.h" |
03ac6e64 | 10 | #include "cache-tree.h" |
22943f1a | 11 | #include "quote.h" |
8e440259 | 12 | #include "blob.h" |
051308f6 | 13 | #include "delta.h" |
ac6245e3 | 14 | #include "builtin.h" |
c455c87c | 15 | #include "string-list.h" |
c1bb9350 | 16 | |
a9486b02 PR |
17 | /* |
18 | * --check turns on checking that the working tree matches the | |
19 | * files that are being modified, but doesn't apply the patch | |
20 | * --stat does just a diffstat, and doesn't actually apply | |
21 | * --numstat does numeric diffstat, and doesn't actually apply | |
22 | * --index-info shows the old and new index info for paths if available. | |
23 | * --index updates the cache as well. | |
24 | * --cached updates only the cache without ever touching the working tree. | |
25 | */ | |
edf2e370 JH |
26 | static const char *prefix; |
27 | static int prefix_length = -1; | |
dbd0f7d3 | 28 | static int newfd = -1; |
edf2e370 | 29 | |
4be60962 | 30 | static int unidiff_zero; |
e36f8b60 | 31 | static int p_value = 1; |
3e8a5db9 | 32 | static int p_value_known; |
96f1e58f | 33 | static int check_index; |
7da3bf37 | 34 | static int update_index; |
96f1e58f DR |
35 | static int cached; |
36 | static int diffstat; | |
37 | static int numstat; | |
38 | static int summary; | |
39 | static int check; | |
a577284a | 40 | static int apply = 1; |
96f1e58f | 41 | static int apply_in_reverse; |
57dc397c | 42 | static int apply_with_reject; |
a2bf404e | 43 | static int apply_verbosely; |
96f1e58f | 44 | static int no_add; |
7a988699 | 45 | static const char *fake_ancestor; |
22943f1a | 46 | static int line_termination = '\n'; |
bf8675d3 | 47 | static unsigned long p_context = ULONG_MAX; |
12dd6e8c | 48 | static const char apply_usage[] = |
1b1dd23f | 49 | "git apply [--stat] [--numstat] [--summary] [--check] [--index] [--cached] [--apply] [--no-add] [--index-info] [--allow-binary-replacement] [--reverse] [--reject] [--verbose] [-z] [-pNUM] [-CNUM] [--whitespace=<nowarn|warn|fix|error|error-all>] <patch>..."; |
c1bb9350 | 50 | |
81bf96bb JH |
51 | static enum ws_error_action { |
52 | nowarn_ws_error, | |
53 | warn_on_ws_error, | |
54 | die_on_ws_error, | |
55 | correct_ws_error, | |
56 | } ws_error_action = warn_on_ws_error; | |
96f1e58f | 57 | static int whitespace_error; |
fc96b7c9 | 58 | static int squelch_whitespace_errors = 5; |
c94bf41c | 59 | static int applied_after_fixing_ws; |
96f1e58f | 60 | static const char *patch_input_file; |
c4730f35 JS |
61 | static const char *root; |
62 | static int root_len; | |
19bfcd5a | 63 | |
2ae1c53b JH |
64 | static void parse_whitespace_option(const char *option) |
65 | { | |
66 | if (!option) { | |
81bf96bb | 67 | ws_error_action = warn_on_ws_error; |
2ae1c53b JH |
68 | return; |
69 | } | |
70 | if (!strcmp(option, "warn")) { | |
81bf96bb | 71 | ws_error_action = warn_on_ws_error; |
2ae1c53b JH |
72 | return; |
73 | } | |
621603b7 | 74 | if (!strcmp(option, "nowarn")) { |
81bf96bb | 75 | ws_error_action = nowarn_ws_error; |
621603b7 JH |
76 | return; |
77 | } | |
2ae1c53b | 78 | if (!strcmp(option, "error")) { |
81bf96bb | 79 | ws_error_action = die_on_ws_error; |
2ae1c53b JH |
80 | return; |
81 | } | |
82 | if (!strcmp(option, "error-all")) { | |
81bf96bb | 83 | ws_error_action = die_on_ws_error; |
2ae1c53b JH |
84 | squelch_whitespace_errors = 0; |
85 | return; | |
86 | } | |
81bf96bb JH |
87 | if (!strcmp(option, "strip") || !strcmp(option, "fix")) { |
88 | ws_error_action = correct_ws_error; | |
2ae1c53b JH |
89 | return; |
90 | } | |
91 | die("unrecognized whitespace option '%s'", option); | |
92 | } | |
93 | ||
f21d6726 JH |
94 | static void set_default_whitespace_mode(const char *whitespace_option) |
95 | { | |
81bf96bb JH |
96 | if (!whitespace_option && !apply_default_whitespace) |
97 | ws_error_action = (apply ? warn_on_ws_error : nowarn_ws_error); | |
f21d6726 JH |
98 | } |
99 | ||
3f40315a LT |
100 | /* |
101 | * For "diff-stat" like behaviour, we keep track of the biggest change | |
102 | * we've seen, and the longest filename. That allows us to do simple | |
103 | * scaling. | |
104 | */ | |
105 | static int max_change, max_len; | |
106 | ||
a4acb0eb LT |
107 | /* |
108 | * Various "current state", notably line numbers and what | |
109 | * file (and how) we're patching right now.. The "is_xxxx" | |
110 | * things are flags, where -1 means "don't know yet". | |
111 | */ | |
46979f56 | 112 | static int linenr = 1; |
19c58fb8 | 113 | |
3cd4f5e8 JH |
114 | /* |
115 | * This represents one "hunk" from a patch, starting with | |
116 | * "@@ -oldpos,oldlines +newpos,newlines @@" marker. The | |
117 | * patch text is pointed at by patch, and its byte length | |
118 | * is stored in size. leading and trailing are the number | |
119 | * of context lines. | |
120 | */ | |
19c58fb8 | 121 | struct fragment { |
47495887 | 122 | unsigned long leading, trailing; |
19c58fb8 LT |
123 | unsigned long oldpos, oldlines; |
124 | unsigned long newpos, newlines; | |
125 | const char *patch; | |
126 | int size; | |
57dc397c | 127 | int rejected; |
19c58fb8 LT |
128 | struct fragment *next; |
129 | }; | |
130 | ||
3cd4f5e8 JH |
131 | /* |
132 | * When dealing with a binary patch, we reuse "leading" field | |
133 | * to store the type of the binary hunk, either deflated "delta" | |
134 | * or deflated "literal". | |
135 | */ | |
136 | #define binary_patch_method leading | |
137 | #define BINARY_DELTA_DEFLATED 1 | |
138 | #define BINARY_LITERAL_DEFLATED 2 | |
139 | ||
81bf96bb JH |
140 | /* |
141 | * This represents a "patch" to a file, both metainfo changes | |
142 | * such as creation/deletion, filemode and content changes represented | |
143 | * as a series of fragments. | |
144 | */ | |
19c58fb8 | 145 | struct patch { |
5041aa70 | 146 | char *new_name, *old_name, *def_name; |
19c58fb8 | 147 | unsigned int old_mode, new_mode; |
3dad11bf | 148 | int is_new, is_delete; /* -1 = unknown, 0 = false, 1 = true */ |
57dc397c | 149 | int rejected; |
cf1b7869 | 150 | unsigned ws_rule; |
0660626c | 151 | unsigned long deflate_origlen; |
3f40315a | 152 | int lines_added, lines_deleted; |
96c912a4 | 153 | int score; |
9987d7c5 | 154 | unsigned int is_toplevel_relative:1; |
3dad11bf RS |
155 | unsigned int inaccurate_eof:1; |
156 | unsigned int is_binary:1; | |
157 | unsigned int is_copy:1; | |
158 | unsigned int is_rename:1; | |
c14b9d1e | 159 | unsigned int recount:1; |
19c58fb8 | 160 | struct fragment *fragments; |
5aa7d94c | 161 | char *result; |
c32f749f | 162 | size_t resultsize; |
2cf67f1e JH |
163 | char old_sha1_prefix[41]; |
164 | char new_sha1_prefix[41]; | |
19c58fb8 LT |
165 | struct patch *next; |
166 | }; | |
46979f56 | 167 | |
b94f2eda JH |
168 | /* |
169 | * A line in a file, len-bytes long (includes the terminating LF, | |
170 | * except for an incomplete line at the end if the file ends with | |
171 | * one), and its contents hashes to 'hash'. | |
172 | */ | |
173 | struct line { | |
174 | size_t len; | |
175 | unsigned hash : 24; | |
176 | unsigned flag : 8; | |
c330fdd4 | 177 | #define LINE_COMMON 1 |
b94f2eda JH |
178 | }; |
179 | ||
180 | /* | |
181 | * This represents a "file", which is an array of "lines". | |
182 | */ | |
183 | struct image { | |
184 | char *buf; | |
185 | size_t len; | |
186 | size_t nr; | |
c330fdd4 | 187 | size_t alloc; |
b94f2eda JH |
188 | struct line *line_allocated; |
189 | struct line *line; | |
190 | }; | |
191 | ||
7a07841c DZ |
192 | /* |
193 | * Records filenames that have been touched, in order to handle | |
194 | * the case where more than one patches touch the same file. | |
195 | */ | |
196 | ||
c455c87c | 197 | static struct string_list fn_table; |
7a07841c | 198 | |
b94f2eda JH |
199 | static uint32_t hash_line(const char *cp, size_t len) |
200 | { | |
201 | size_t i; | |
202 | uint32_t h; | |
203 | for (i = 0, h = 0; i < len; i++) { | |
204 | if (!isspace(cp[i])) { | |
205 | h = h * 3 + (cp[i] & 0xff); | |
206 | } | |
207 | } | |
208 | return h; | |
209 | } | |
210 | ||
c330fdd4 JH |
211 | static void add_line_info(struct image *img, const char *bol, size_t len, unsigned flag) |
212 | { | |
213 | ALLOC_GROW(img->line_allocated, img->nr + 1, img->alloc); | |
214 | img->line_allocated[img->nr].len = len; | |
215 | img->line_allocated[img->nr].hash = hash_line(bol, len); | |
216 | img->line_allocated[img->nr].flag = flag; | |
217 | img->nr++; | |
218 | } | |
219 | ||
b94f2eda JH |
220 | static void prepare_image(struct image *image, char *buf, size_t len, |
221 | int prepare_linetable) | |
222 | { | |
223 | const char *cp, *ep; | |
b94f2eda | 224 | |
c330fdd4 | 225 | memset(image, 0, sizeof(*image)); |
b94f2eda JH |
226 | image->buf = buf; |
227 | image->len = len; | |
228 | ||
c330fdd4 | 229 | if (!prepare_linetable) |
b94f2eda | 230 | return; |
b94f2eda JH |
231 | |
232 | ep = image->buf + image->len; | |
b94f2eda | 233 | cp = image->buf; |
b94f2eda JH |
234 | while (cp < ep) { |
235 | const char *next; | |
236 | for (next = cp; next < ep && *next != '\n'; next++) | |
237 | ; | |
238 | if (next < ep) | |
239 | next++; | |
c330fdd4 | 240 | add_line_info(image, cp, next - cp, 0); |
b94f2eda | 241 | cp = next; |
b94f2eda | 242 | } |
c330fdd4 | 243 | image->line = image->line_allocated; |
b94f2eda JH |
244 | } |
245 | ||
246 | static void clear_image(struct image *image) | |
247 | { | |
248 | free(image->buf); | |
249 | image->buf = NULL; | |
250 | image->len = 0; | |
251 | } | |
252 | ||
81bf96bb JH |
253 | static void say_patch_name(FILE *output, const char *pre, |
254 | struct patch *patch, const char *post) | |
a2bf404e JH |
255 | { |
256 | fputs(pre, output); | |
257 | if (patch->old_name && patch->new_name && | |
258 | strcmp(patch->old_name, patch->new_name)) { | |
663af342 | 259 | quote_c_style(patch->old_name, NULL, output, 0); |
a2bf404e | 260 | fputs(" => ", output); |
663af342 PH |
261 | quote_c_style(patch->new_name, NULL, output, 0); |
262 | } else { | |
a2bf404e JH |
263 | const char *n = patch->new_name; |
264 | if (!n) | |
265 | n = patch->old_name; | |
663af342 | 266 | quote_c_style(n, NULL, output, 0); |
a2bf404e JH |
267 | } |
268 | fputs(post, output); | |
269 | } | |
270 | ||
c1bb9350 | 271 | #define CHUNKSIZE (8192) |
a4acb0eb | 272 | #define SLOP (16) |
c1bb9350 | 273 | |
9a76adeb | 274 | static void read_patch_file(struct strbuf *sb, int fd) |
c1bb9350 | 275 | { |
9a76adeb | 276 | if (strbuf_read(sb, fd, 0) < 0) |
af6eb822 | 277 | die("git-apply: read returned %s", strerror(errno)); |
a4acb0eb LT |
278 | |
279 | /* | |
280 | * Make sure that we have some slop in the buffer | |
281 | * so that we can do speculative "memcmp" etc, and | |
282 | * see to it that it is NUL-filled. | |
283 | */ | |
9a76adeb PH |
284 | strbuf_grow(sb, SLOP); |
285 | memset(sb->buf + sb->len, 0, SLOP); | |
c1bb9350 LT |
286 | } |
287 | ||
3cca928d | 288 | static unsigned long linelen(const char *buffer, unsigned long size) |
c1bb9350 LT |
289 | { |
290 | unsigned long len = 0; | |
291 | while (size--) { | |
292 | len++; | |
293 | if (*buffer++ == '\n') | |
294 | break; | |
295 | } | |
296 | return len; | |
297 | } | |
298 | ||
a4acb0eb LT |
299 | static int is_dev_null(const char *str) |
300 | { | |
301 | return !memcmp("/dev/null", str, 9) && isspace(str[9]); | |
302 | } | |
303 | ||
381ca9a3 LT |
304 | #define TERM_SPACE 1 |
305 | #define TERM_TAB 2 | |
9a4a100e LT |
306 | |
307 | static int name_terminate(const char *name, int namelen, int c, int terminate) | |
308 | { | |
309 | if (c == ' ' && !(terminate & TERM_SPACE)) | |
310 | return 0; | |
311 | if (c == '\t' && !(terminate & TERM_TAB)) | |
312 | return 0; | |
313 | ||
9a4a100e LT |
314 | return 1; |
315 | } | |
316 | ||
56185f49 | 317 | static char *find_name(const char *line, char *def, int p_value, int terminate) |
c1bb9350 | 318 | { |
a4acb0eb LT |
319 | int len; |
320 | const char *start = line; | |
a4acb0eb | 321 | |
22943f1a | 322 | if (*line == '"') { |
7fb1011e PH |
323 | struct strbuf name; |
324 | ||
81bf96bb JH |
325 | /* |
326 | * Proposed "new-style" GNU patch/diff format; see | |
22943f1a JH |
327 | * http://marc.theaimsgroup.com/?l=git&m=112927316408690&w=2 |
328 | */ | |
7fb1011e PH |
329 | strbuf_init(&name, 0); |
330 | if (!unquote_c_style(&name, line, NULL)) { | |
331 | char *cp; | |
332 | ||
333 | for (cp = name.buf; p_value; p_value--) { | |
3d845d77 | 334 | cp = strchr(cp, '/'); |
22943f1a JH |
335 | if (!cp) |
336 | break; | |
337 | cp++; | |
22943f1a JH |
338 | } |
339 | if (cp) { | |
340 | /* name can later be freed, so we need | |
341 | * to memmove, not just return cp | |
342 | */ | |
7fb1011e | 343 | strbuf_remove(&name, 0, cp - name.buf); |
22943f1a | 344 | free(def); |
c4730f35 JS |
345 | if (root) |
346 | strbuf_insert(&name, 0, root, root_len); | |
b315c5c0 | 347 | return strbuf_detach(&name, NULL); |
22943f1a JH |
348 | } |
349 | } | |
7fb1011e | 350 | strbuf_release(&name); |
22943f1a JH |
351 | } |
352 | ||
c1bb9350 | 353 | for (;;) { |
a4acb0eb | 354 | char c = *line; |
9a4a100e LT |
355 | |
356 | if (isspace(c)) { | |
357 | if (c == '\n') | |
358 | break; | |
359 | if (name_terminate(start, line-start, c, terminate)) | |
360 | break; | |
361 | } | |
a4acb0eb LT |
362 | line++; |
363 | if (c == '/' && !--p_value) | |
364 | start = line; | |
365 | } | |
366 | if (!start) | |
367 | return def; | |
368 | len = line - start; | |
369 | if (!len) | |
370 | return def; | |
371 | ||
372 | /* | |
373 | * Generally we prefer the shorter name, especially | |
374 | * if the other one is just a variation of that with | |
375 | * something else tacked on to the end (ie "file.orig" | |
376 | * or "file~"). | |
377 | */ | |
378 | if (def) { | |
379 | int deflen = strlen(def); | |
380 | if (deflen < len && !strncmp(start, def, deflen)) | |
381 | return def; | |
ca032835 | 382 | free(def); |
c1bb9350 | 383 | } |
a4acb0eb | 384 | |
c4730f35 JS |
385 | if (root) { |
386 | char *ret = xmalloc(root_len + len + 1); | |
387 | strcpy(ret, root); | |
388 | memcpy(ret + root_len, start, len); | |
389 | ret[root_len + len] = '\0'; | |
390 | return ret; | |
391 | } | |
392 | ||
182af834 | 393 | return xmemdupz(start, len); |
a4acb0eb LT |
394 | } |
395 | ||
3e8a5db9 JH |
396 | static int count_slashes(const char *cp) |
397 | { | |
398 | int cnt = 0; | |
399 | char ch; | |
400 | ||
401 | while ((ch = *cp++)) | |
402 | if (ch == '/') | |
403 | cnt++; | |
404 | return cnt; | |
405 | } | |
406 | ||
407 | /* | |
408 | * Given the string after "--- " or "+++ ", guess the appropriate | |
409 | * p_value for the given patch. | |
410 | */ | |
411 | static int guess_p_value(const char *nameline) | |
412 | { | |
413 | char *name, *cp; | |
414 | int val = -1; | |
415 | ||
416 | if (is_dev_null(nameline)) | |
417 | return -1; | |
418 | name = find_name(nameline, NULL, 0, TERM_SPACE | TERM_TAB); | |
419 | if (!name) | |
420 | return -1; | |
421 | cp = strchr(name, '/'); | |
422 | if (!cp) | |
423 | val = 0; | |
424 | else if (prefix) { | |
425 | /* | |
426 | * Does it begin with "a/$our-prefix" and such? Then this is | |
427 | * very likely to apply to our directory. | |
428 | */ | |
429 | if (!strncmp(name, prefix, prefix_length)) | |
430 | val = count_slashes(prefix); | |
431 | else { | |
432 | cp++; | |
433 | if (!strncmp(cp, prefix, prefix_length)) | |
434 | val = count_slashes(prefix) + 1; | |
435 | } | |
436 | } | |
437 | free(name); | |
438 | return val; | |
439 | } | |
440 | ||
a4acb0eb | 441 | /* |
88f6dbaf | 442 | * Get the name etc info from the ---/+++ lines of a traditional patch header |
a4acb0eb | 443 | * |
9a4a100e LT |
444 | * FIXME! The end-of-filename heuristics are kind of screwy. For existing |
445 | * files, we can happily check the index for a match, but for creating a | |
446 | * new file we should try to match whatever "patch" does. I have no idea. | |
a4acb0eb | 447 | */ |
19c58fb8 | 448 | static void parse_traditional_patch(const char *first, const char *second, struct patch *patch) |
a4acb0eb | 449 | { |
a4acb0eb LT |
450 | char *name; |
451 | ||
a9486b02 PR |
452 | first += 4; /* skip "--- " */ |
453 | second += 4; /* skip "+++ " */ | |
3e8a5db9 JH |
454 | if (!p_value_known) { |
455 | int p, q; | |
456 | p = guess_p_value(first); | |
457 | q = guess_p_value(second); | |
458 | if (p < 0) p = q; | |
459 | if (0 <= p && p == q) { | |
460 | p_value = p; | |
461 | p_value_known = 1; | |
462 | } | |
463 | } | |
a4acb0eb | 464 | if (is_dev_null(first)) { |
19c58fb8 LT |
465 | patch->is_new = 1; |
466 | patch->is_delete = 0; | |
5041aa70 | 467 | name = find_name(second, NULL, p_value, TERM_SPACE | TERM_TAB); |
19c58fb8 | 468 | patch->new_name = name; |
a4acb0eb | 469 | } else if (is_dev_null(second)) { |
19c58fb8 LT |
470 | patch->is_new = 0; |
471 | patch->is_delete = 1; | |
381ca9a3 | 472 | name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB); |
19c58fb8 | 473 | patch->old_name = name; |
a4acb0eb | 474 | } else { |
381ca9a3 LT |
475 | name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB); |
476 | name = find_name(second, name, p_value, TERM_SPACE | TERM_TAB); | |
19c58fb8 | 477 | patch->old_name = patch->new_name = name; |
a4acb0eb LT |
478 | } |
479 | if (!name) | |
480 | die("unable to find filename in patch at line %d", linenr); | |
a4acb0eb LT |
481 | } |
482 | ||
19c58fb8 | 483 | static int gitdiff_hdrend(const char *line, struct patch *patch) |
a4acb0eb LT |
484 | { |
485 | return -1; | |
486 | } | |
487 | ||
1e3f6b6e LT |
488 | /* |
489 | * We're anal about diff header consistency, to make | |
490 | * sure that we don't end up having strange ambiguous | |
491 | * patches floating around. | |
492 | * | |
493 | * As a result, gitdiff_{old|new}name() will check | |
494 | * their names against any previous information, just | |
495 | * to make sure.. | |
496 | */ | |
497 | static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, const char *oldnew) | |
498 | { | |
1e3f6b6e | 499 | if (!orig_name && !isnull) |
79ee194e | 500 | return find_name(line, NULL, p_value, TERM_TAB); |
1e3f6b6e | 501 | |
1e3f6b6e | 502 | if (orig_name) { |
22943f1a JH |
503 | int len; |
504 | const char *name; | |
505 | char *another; | |
1e3f6b6e LT |
506 | name = orig_name; |
507 | len = strlen(name); | |
508 | if (isnull) | |
509 | die("git-apply: bad git-diff - expected /dev/null, got %s on line %d", name, linenr); | |
79ee194e | 510 | another = find_name(line, NULL, p_value, TERM_TAB); |
22943f1a JH |
511 | if (!another || memcmp(another, name, len)) |
512 | die("git-apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr); | |
513 | free(another); | |
1e3f6b6e LT |
514 | return orig_name; |
515 | } | |
22943f1a JH |
516 | else { |
517 | /* expect "/dev/null" */ | |
518 | if (memcmp("/dev/null", line, 9) || line[9] != '\n') | |
519 | die("git-apply: bad git-diff - expected /dev/null on line %d", linenr); | |
520 | return NULL; | |
521 | } | |
1e3f6b6e LT |
522 | } |
523 | ||
19c58fb8 | 524 | static int gitdiff_oldname(const char *line, struct patch *patch) |
a4acb0eb | 525 | { |
19c58fb8 | 526 | patch->old_name = gitdiff_verify_name(line, patch->is_new, patch->old_name, "old"); |
a4acb0eb LT |
527 | return 0; |
528 | } | |
529 | ||
19c58fb8 | 530 | static int gitdiff_newname(const char *line, struct patch *patch) |
a4acb0eb | 531 | { |
19c58fb8 | 532 | patch->new_name = gitdiff_verify_name(line, patch->is_delete, patch->new_name, "new"); |
a4acb0eb LT |
533 | return 0; |
534 | } | |
535 | ||
19c58fb8 | 536 | static int gitdiff_oldmode(const char *line, struct patch *patch) |
a4acb0eb | 537 | { |
19c58fb8 | 538 | patch->old_mode = strtoul(line, NULL, 8); |
a4acb0eb LT |
539 | return 0; |
540 | } | |
541 | ||
19c58fb8 | 542 | static int gitdiff_newmode(const char *line, struct patch *patch) |
a4acb0eb | 543 | { |
19c58fb8 | 544 | patch->new_mode = strtoul(line, NULL, 8); |
a4acb0eb LT |
545 | return 0; |
546 | } | |
547 | ||
19c58fb8 | 548 | static int gitdiff_delete(const char *line, struct patch *patch) |
a4acb0eb | 549 | { |
19c58fb8 | 550 | patch->is_delete = 1; |
5041aa70 | 551 | patch->old_name = patch->def_name; |
19c58fb8 | 552 | return gitdiff_oldmode(line, patch); |
a4acb0eb LT |
553 | } |
554 | ||
19c58fb8 | 555 | static int gitdiff_newfile(const char *line, struct patch *patch) |
a4acb0eb | 556 | { |
19c58fb8 | 557 | patch->is_new = 1; |
5041aa70 | 558 | patch->new_name = patch->def_name; |
19c58fb8 | 559 | return gitdiff_newmode(line, patch); |
a4acb0eb LT |
560 | } |
561 | ||
19c58fb8 | 562 | static int gitdiff_copysrc(const char *line, struct patch *patch) |
a4acb0eb | 563 | { |
19c58fb8 LT |
564 | patch->is_copy = 1; |
565 | patch->old_name = find_name(line, NULL, 0, 0); | |
a4acb0eb LT |
566 | return 0; |
567 | } | |
568 | ||
19c58fb8 | 569 | static int gitdiff_copydst(const char *line, struct patch *patch) |
a4acb0eb | 570 | { |
19c58fb8 LT |
571 | patch->is_copy = 1; |
572 | patch->new_name = find_name(line, NULL, 0, 0); | |
a4acb0eb LT |
573 | return 0; |
574 | } | |
575 | ||
19c58fb8 | 576 | static int gitdiff_renamesrc(const char *line, struct patch *patch) |
a4acb0eb | 577 | { |
19c58fb8 LT |
578 | patch->is_rename = 1; |
579 | patch->old_name = find_name(line, NULL, 0, 0); | |
a4acb0eb LT |
580 | return 0; |
581 | } | |
582 | ||
19c58fb8 | 583 | static int gitdiff_renamedst(const char *line, struct patch *patch) |
a4acb0eb | 584 | { |
19c58fb8 LT |
585 | patch->is_rename = 1; |
586 | patch->new_name = find_name(line, NULL, 0, 0); | |
a4acb0eb LT |
587 | return 0; |
588 | } | |
589 | ||
19c58fb8 | 590 | static int gitdiff_similarity(const char *line, struct patch *patch) |
a4acb0eb | 591 | { |
96c912a4 JH |
592 | if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX) |
593 | patch->score = 0; | |
a4acb0eb | 594 | return 0; |
c1bb9350 LT |
595 | } |
596 | ||
70aadac0 JH |
597 | static int gitdiff_dissimilarity(const char *line, struct patch *patch) |
598 | { | |
96c912a4 JH |
599 | if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX) |
600 | patch->score = 0; | |
70aadac0 JH |
601 | return 0; |
602 | } | |
603 | ||
2cf67f1e JH |
604 | static int gitdiff_index(const char *line, struct patch *patch) |
605 | { | |
81bf96bb JH |
606 | /* |
607 | * index line is N hexadecimal, "..", N hexadecimal, | |
2cf67f1e JH |
608 | * and optional space with octal mode. |
609 | */ | |
610 | const char *ptr, *eol; | |
611 | int len; | |
612 | ||
613 | ptr = strchr(line, '.'); | |
9add69b1 | 614 | if (!ptr || ptr[1] != '.' || 40 < ptr - line) |
2cf67f1e JH |
615 | return 0; |
616 | len = ptr - line; | |
617 | memcpy(patch->old_sha1_prefix, line, len); | |
618 | patch->old_sha1_prefix[len] = 0; | |
619 | ||
620 | line = ptr + 2; | |
621 | ptr = strchr(line, ' '); | |
622 | eol = strchr(line, '\n'); | |
623 | ||
624 | if (!ptr || eol < ptr) | |
625 | ptr = eol; | |
626 | len = ptr - line; | |
627 | ||
9add69b1 | 628 | if (40 < len) |
2cf67f1e JH |
629 | return 0; |
630 | memcpy(patch->new_sha1_prefix, line, len); | |
631 | patch->new_sha1_prefix[len] = 0; | |
632 | if (*ptr == ' ') | |
633 | patch->new_mode = patch->old_mode = strtoul(ptr+1, NULL, 8); | |
634 | return 0; | |
635 | } | |
636 | ||
9a4a100e LT |
637 | /* |
638 | * This is normal for a diff that doesn't change anything: we'll fall through | |
639 | * into the next diff. Tell the parser to break out. | |
640 | */ | |
19c58fb8 | 641 | static int gitdiff_unrecognized(const char *line, struct patch *patch) |
9a4a100e LT |
642 | { |
643 | return -1; | |
644 | } | |
645 | ||
22943f1a JH |
646 | static const char *stop_at_slash(const char *line, int llen) |
647 | { | |
648 | int i; | |
649 | ||
650 | for (i = 0; i < llen; i++) { | |
651 | int ch = line[i]; | |
652 | if (ch == '/') | |
653 | return line + i; | |
654 | } | |
655 | return NULL; | |
656 | } | |
657 | ||
81bf96bb JH |
658 | /* |
659 | * This is to extract the same name that appears on "diff --git" | |
22943f1a JH |
660 | * line. We do not find and return anything if it is a rename |
661 | * patch, and it is OK because we will find the name elsewhere. | |
662 | * We need to reliably find name only when it is mode-change only, | |
663 | * creation or deletion of an empty file. In any of these cases, | |
664 | * both sides are the same name under a/ and b/ respectively. | |
665 | */ | |
666 | static char *git_header_name(char *line, int llen) | |
5041aa70 | 667 | { |
22943f1a JH |
668 | const char *name; |
669 | const char *second = NULL; | |
7fb1011e | 670 | size_t len; |
5041aa70 | 671 | |
22943f1a JH |
672 | line += strlen("diff --git "); |
673 | llen -= strlen("diff --git "); | |
674 | ||
675 | if (*line == '"') { | |
676 | const char *cp; | |
7fb1011e PH |
677 | struct strbuf first; |
678 | struct strbuf sp; | |
679 | ||
680 | strbuf_init(&first, 0); | |
681 | strbuf_init(&sp, 0); | |
682 | ||
683 | if (unquote_c_style(&first, line, &second)) | |
684 | goto free_and_fail1; | |
22943f1a JH |
685 | |
686 | /* advance to the first slash */ | |
7fb1011e PH |
687 | cp = stop_at_slash(first.buf, first.len); |
688 | /* we do not accept absolute paths */ | |
689 | if (!cp || cp == first.buf) | |
690 | goto free_and_fail1; | |
691 | strbuf_remove(&first, 0, cp + 1 - first.buf); | |
22943f1a | 692 | |
81bf96bb JH |
693 | /* |
694 | * second points at one past closing dq of name. | |
22943f1a JH |
695 | * find the second name. |
696 | */ | |
697 | while ((second < line + llen) && isspace(*second)) | |
698 | second++; | |
699 | ||
700 | if (line + llen <= second) | |
7fb1011e | 701 | goto free_and_fail1; |
22943f1a | 702 | if (*second == '"') { |
7fb1011e PH |
703 | if (unquote_c_style(&sp, second, NULL)) |
704 | goto free_and_fail1; | |
705 | cp = stop_at_slash(sp.buf, sp.len); | |
706 | if (!cp || cp == sp.buf) | |
707 | goto free_and_fail1; | |
22943f1a | 708 | /* They must match, otherwise ignore */ |
7fb1011e PH |
709 | if (strcmp(cp + 1, first.buf)) |
710 | goto free_and_fail1; | |
711 | strbuf_release(&sp); | |
b315c5c0 | 712 | return strbuf_detach(&first, NULL); |
22943f1a JH |
713 | } |
714 | ||
715 | /* unquoted second */ | |
716 | cp = stop_at_slash(second, line + llen - second); | |
717 | if (!cp || cp == second) | |
7fb1011e | 718 | goto free_and_fail1; |
22943f1a | 719 | cp++; |
7fb1011e PH |
720 | if (line + llen - cp != first.len + 1 || |
721 | memcmp(first.buf, cp, first.len)) | |
722 | goto free_and_fail1; | |
b315c5c0 | 723 | return strbuf_detach(&first, NULL); |
7fb1011e PH |
724 | |
725 | free_and_fail1: | |
726 | strbuf_release(&first); | |
727 | strbuf_release(&sp); | |
728 | return NULL; | |
5041aa70 LT |
729 | } |
730 | ||
22943f1a JH |
731 | /* unquoted first name */ |
732 | name = stop_at_slash(line, llen); | |
733 | if (!name || name == line) | |
5041aa70 | 734 | return NULL; |
22943f1a JH |
735 | name++; |
736 | ||
81bf96bb JH |
737 | /* |
738 | * since the first name is unquoted, a dq if exists must be | |
22943f1a JH |
739 | * the beginning of the second name. |
740 | */ | |
741 | for (second = name; second < line + llen; second++) { | |
742 | if (*second == '"') { | |
7fb1011e | 743 | struct strbuf sp; |
22943f1a | 744 | const char *np; |
7fb1011e PH |
745 | |
746 | strbuf_init(&sp, 0); | |
747 | if (unquote_c_style(&sp, second, NULL)) | |
748 | goto free_and_fail2; | |
749 | ||
750 | np = stop_at_slash(sp.buf, sp.len); | |
751 | if (!np || np == sp.buf) | |
752 | goto free_and_fail2; | |
22943f1a | 753 | np++; |
7fb1011e PH |
754 | |
755 | len = sp.buf + sp.len - np; | |
756 | if (len < second - name && | |
22943f1a JH |
757 | !strncmp(np, name, len) && |
758 | isspace(name[len])) { | |
759 | /* Good */ | |
7fb1011e | 760 | strbuf_remove(&sp, 0, np - sp.buf); |
b315c5c0 | 761 | return strbuf_detach(&sp, NULL); |
22943f1a | 762 | } |
7fb1011e PH |
763 | |
764 | free_and_fail2: | |
765 | strbuf_release(&sp); | |
766 | return NULL; | |
22943f1a JH |
767 | } |
768 | } | |
769 | ||
5041aa70 LT |
770 | /* |
771 | * Accept a name only if it shows up twice, exactly the same | |
772 | * form. | |
773 | */ | |
774 | for (len = 0 ; ; len++) { | |
dd305c84 | 775 | switch (name[len]) { |
5041aa70 LT |
776 | default: |
777 | continue; | |
778 | case '\n': | |
e70a165d | 779 | return NULL; |
5041aa70 LT |
780 | case '\t': case ' ': |
781 | second = name+len; | |
782 | for (;;) { | |
783 | char c = *second++; | |
784 | if (c == '\n') | |
785 | return NULL; | |
786 | if (c == '/') | |
787 | break; | |
788 | } | |
0e87e048 | 789 | if (second[len] == '\n' && !memcmp(name, second, len)) { |
182af834 | 790 | return xmemdupz(name, len); |
5041aa70 LT |
791 | } |
792 | } | |
793 | } | |
5041aa70 LT |
794 | } |
795 | ||
c1bb9350 | 796 | /* Verify that we recognize the lines following a git header */ |
19c58fb8 | 797 | static int parse_git_header(char *line, int len, unsigned int size, struct patch *patch) |
c1bb9350 | 798 | { |
a4acb0eb LT |
799 | unsigned long offset; |
800 | ||
801 | /* A git diff has explicit new/delete information, so we don't guess */ | |
19c58fb8 LT |
802 | patch->is_new = 0; |
803 | patch->is_delete = 0; | |
a4acb0eb | 804 | |
5041aa70 LT |
805 | /* |
806 | * Some things may not have the old name in the | |
807 | * rest of the headers anywhere (pure mode changes, | |
808 | * or removing or adding empty files), so we get | |
809 | * the default name from the header. | |
810 | */ | |
22943f1a | 811 | patch->def_name = git_header_name(line, len); |
5041aa70 | 812 | |
a4acb0eb LT |
813 | line += len; |
814 | size -= len; | |
815 | linenr++; | |
816 | for (offset = len ; size > 0 ; offset += len, size -= len, line += len, linenr++) { | |
817 | static const struct opentry { | |
818 | const char *str; | |
19c58fb8 | 819 | int (*fn)(const char *, struct patch *); |
a4acb0eb LT |
820 | } optable[] = { |
821 | { "@@ -", gitdiff_hdrend }, | |
822 | { "--- ", gitdiff_oldname }, | |
823 | { "+++ ", gitdiff_newname }, | |
824 | { "old mode ", gitdiff_oldmode }, | |
825 | { "new mode ", gitdiff_newmode }, | |
826 | { "deleted file mode ", gitdiff_delete }, | |
827 | { "new file mode ", gitdiff_newfile }, | |
828 | { "copy from ", gitdiff_copysrc }, | |
829 | { "copy to ", gitdiff_copydst }, | |
33f4d087 LT |
830 | { "rename old ", gitdiff_renamesrc }, |
831 | { "rename new ", gitdiff_renamedst }, | |
dc938417 LT |
832 | { "rename from ", gitdiff_renamesrc }, |
833 | { "rename to ", gitdiff_renamedst }, | |
a4acb0eb | 834 | { "similarity index ", gitdiff_similarity }, |
70aadac0 | 835 | { "dissimilarity index ", gitdiff_dissimilarity }, |
2cf67f1e | 836 | { "index ", gitdiff_index }, |
9a4a100e | 837 | { "", gitdiff_unrecognized }, |
a4acb0eb LT |
838 | }; |
839 | int i; | |
c1bb9350 | 840 | |
c1bb9350 | 841 | len = linelen(line, size); |
a4acb0eb | 842 | if (!len || line[len-1] != '\n') |
c1bb9350 | 843 | break; |
b4f2a6ac | 844 | for (i = 0; i < ARRAY_SIZE(optable); i++) { |
a4acb0eb LT |
845 | const struct opentry *p = optable + i; |
846 | int oplen = strlen(p->str); | |
847 | if (len < oplen || memcmp(p->str, line, oplen)) | |
848 | continue; | |
19c58fb8 | 849 | if (p->fn(line + oplen, patch) < 0) |
a4acb0eb | 850 | return offset; |
9a4a100e | 851 | break; |
a4acb0eb | 852 | } |
c1bb9350 LT |
853 | } |
854 | ||
a4acb0eb | 855 | return offset; |
c1bb9350 LT |
856 | } |
857 | ||
fab2c257 | 858 | static int parse_num(const char *line, unsigned long *p) |
46979f56 LT |
859 | { |
860 | char *ptr; | |
fab2c257 LT |
861 | |
862 | if (!isdigit(*line)) | |
863 | return 0; | |
864 | *p = strtoul(line, &ptr, 10); | |
865 | return ptr - line; | |
866 | } | |
867 | ||
868 | static int parse_range(const char *line, int len, int offset, const char *expect, | |
81bf96bb | 869 | unsigned long *p1, unsigned long *p2) |
fab2c257 | 870 | { |
46979f56 LT |
871 | int digits, ex; |
872 | ||
873 | if (offset < 0 || offset >= len) | |
874 | return -1; | |
875 | line += offset; | |
876 | len -= offset; | |
877 | ||
fab2c257 LT |
878 | digits = parse_num(line, p1); |
879 | if (!digits) | |
46979f56 | 880 | return -1; |
46979f56 LT |
881 | |
882 | offset += digits; | |
883 | line += digits; | |
884 | len -= digits; | |
885 | ||
c1504628 | 886 | *p2 = 1; |
fab2c257 LT |
887 | if (*line == ',') { |
888 | digits = parse_num(line+1, p2); | |
889 | if (!digits) | |
890 | return -1; | |
891 | ||
892 | offset += digits+1; | |
893 | line += digits+1; | |
894 | len -= digits+1; | |
895 | } | |
896 | ||
46979f56 LT |
897 | ex = strlen(expect); |
898 | if (ex > len) | |
899 | return -1; | |
900 | if (memcmp(line, expect, ex)) | |
901 | return -1; | |
902 | ||
903 | return offset + ex; | |
904 | } | |
905 | ||
c14b9d1e JS |
906 | static void recount_diff(char *line, int size, struct fragment *fragment) |
907 | { | |
908 | int oldlines = 0, newlines = 0, ret = 0; | |
909 | ||
910 | if (size < 1) { | |
911 | warning("recount: ignore empty hunk"); | |
912 | return; | |
913 | } | |
914 | ||
915 | for (;;) { | |
916 | int len = linelen(line, size); | |
917 | size -= len; | |
918 | line += len; | |
919 | ||
920 | if (size < 1) | |
921 | break; | |
922 | ||
923 | switch (*line) { | |
924 | case ' ': case '\n': | |
925 | newlines++; | |
926 | /* fall through */ | |
927 | case '-': | |
928 | oldlines++; | |
929 | continue; | |
930 | case '+': | |
931 | newlines++; | |
932 | continue; | |
933 | case '\\': | |
6cf91492 | 934 | continue; |
c14b9d1e JS |
935 | case '@': |
936 | ret = size < 3 || prefixcmp(line, "@@ "); | |
937 | break; | |
938 | case 'd': | |
939 | ret = size < 5 || prefixcmp(line, "diff "); | |
940 | break; | |
941 | default: | |
942 | ret = -1; | |
943 | break; | |
944 | } | |
945 | if (ret) { | |
946 | warning("recount: unexpected line: %.*s", | |
947 | (int)linelen(line, size), line); | |
948 | return; | |
949 | } | |
950 | break; | |
951 | } | |
952 | fragment->oldlines = oldlines; | |
953 | fragment->newlines = newlines; | |
954 | } | |
955 | ||
46979f56 LT |
956 | /* |
957 | * Parse a unified diff fragment header of the | |
958 | * form "@@ -a,b +c,d @@" | |
959 | */ | |
19c58fb8 | 960 | static int parse_fragment_header(char *line, int len, struct fragment *fragment) |
46979f56 LT |
961 | { |
962 | int offset; | |
963 | ||
964 | if (!len || line[len-1] != '\n') | |
965 | return -1; | |
966 | ||
967 | /* Figure out the number of lines in a fragment */ | |
fab2c257 LT |
968 | offset = parse_range(line, len, 4, " +", &fragment->oldpos, &fragment->oldlines); |
969 | offset = parse_range(line, len, offset, " @@", &fragment->newpos, &fragment->newlines); | |
46979f56 LT |
970 | |
971 | return offset; | |
972 | } | |
973 | ||
19c58fb8 | 974 | static int find_header(char *line, unsigned long size, int *hdrsize, struct patch *patch) |
c1bb9350 LT |
975 | { |
976 | unsigned long offset, len; | |
977 | ||
9987d7c5 | 978 | patch->is_toplevel_relative = 0; |
19c58fb8 LT |
979 | patch->is_rename = patch->is_copy = 0; |
980 | patch->is_new = patch->is_delete = -1; | |
981 | patch->old_mode = patch->new_mode = 0; | |
982 | patch->old_name = patch->new_name = NULL; | |
46979f56 | 983 | for (offset = 0; size > 0; offset += len, size -= len, line += len, linenr++) { |
c1bb9350 LT |
984 | unsigned long nextlen; |
985 | ||
986 | len = linelen(line, size); | |
987 | if (!len) | |
988 | break; | |
989 | ||
990 | /* Testing this early allows us to take a few shortcuts.. */ | |
991 | if (len < 6) | |
992 | continue; | |
46979f56 LT |
993 | |
994 | /* | |
82e5a82f | 995 | * Make sure we don't find any unconnected patch fragments. |
46979f56 LT |
996 | * That's a sign that we didn't find a header, and that a |
997 | * patch has become corrupted/broken up. | |
998 | */ | |
999 | if (!memcmp("@@ -", line, 4)) { | |
19c58fb8 LT |
1000 | struct fragment dummy; |
1001 | if (parse_fragment_header(line, len, &dummy) < 0) | |
46979f56 | 1002 | continue; |
65341411 JH |
1003 | die("patch fragment without header at line %d: %.*s", |
1004 | linenr, (int)len-1, line); | |
46979f56 LT |
1005 | } |
1006 | ||
c1bb9350 LT |
1007 | if (size < len + 6) |
1008 | break; | |
1009 | ||
1010 | /* | |
1011 | * Git patch? It might not have a real patch, just a rename | |
1012 | * or mode change, so we handle that specially | |
1013 | */ | |
1014 | if (!memcmp("diff --git ", line, 11)) { | |
19c58fb8 | 1015 | int git_hdr_len = parse_git_header(line, len, size, patch); |
206de27e | 1016 | if (git_hdr_len <= len) |
c1bb9350 | 1017 | continue; |
b7e8039a LT |
1018 | if (!patch->old_name && !patch->new_name) { |
1019 | if (!patch->def_name) | |
1020 | die("git diff header lacks filename information (line %d)", linenr); | |
1021 | patch->old_name = patch->new_name = patch->def_name; | |
1022 | } | |
9987d7c5 | 1023 | patch->is_toplevel_relative = 1; |
a4acb0eb | 1024 | *hdrsize = git_hdr_len; |
c1bb9350 LT |
1025 | return offset; |
1026 | } | |
1027 | ||
81bf96bb | 1028 | /* --- followed by +++ ? */ |
c1bb9350 LT |
1029 | if (memcmp("--- ", line, 4) || memcmp("+++ ", line + len, 4)) |
1030 | continue; | |
1031 | ||
1032 | /* | |
1033 | * We only accept unified patches, so we want it to | |
1034 | * at least have "@@ -a,b +c,d @@\n", which is 14 chars | |
81bf96bb | 1035 | * minimum ("@@ -0,0 +1 @@\n" is the shortest). |
c1bb9350 LT |
1036 | */ |
1037 | nextlen = linelen(line + len, size - len); | |
1038 | if (size < nextlen + 14 || memcmp("@@ -", line + len + nextlen, 4)) | |
1039 | continue; | |
1040 | ||
1041 | /* Ok, we'll consider it a patch */ | |
19c58fb8 | 1042 | parse_traditional_patch(line, line+len, patch); |
c1bb9350 | 1043 | *hdrsize = len + nextlen; |
46979f56 | 1044 | linenr += 2; |
c1bb9350 LT |
1045 | return offset; |
1046 | } | |
1047 | return -1; | |
1048 | } | |
1049 | ||
cf1b7869 | 1050 | static void check_whitespace(const char *line, int len, unsigned ws_rule) |
d0c25035 | 1051 | { |
c1795bb0 | 1052 | char *err; |
8f8841e9 | 1053 | unsigned result = ws_check(line + 1, len - 1, ws_rule); |
c1795bb0 WC |
1054 | if (!result) |
1055 | return; | |
d0c25035 | 1056 | |
d0c25035 JH |
1057 | whitespace_error++; |
1058 | if (squelch_whitespace_errors && | |
1059 | squelch_whitespace_errors < whitespace_error) | |
1060 | ; | |
c1795bb0 WC |
1061 | else { |
1062 | err = whitespace_error_string(result); | |
45e2a4b2 | 1063 | fprintf(stderr, "%s:%d: %s.\n%.*s\n", |
8f8841e9 | 1064 | patch_input_file, linenr, err, len - 2, line + 1); |
c1795bb0 WC |
1065 | free(err); |
1066 | } | |
d0c25035 JH |
1067 | } |
1068 | ||
c1bb9350 | 1069 | /* |
4be60962 JH |
1070 | * Parse a unified diff. Note that this really needs to parse each |
1071 | * fragment separately, since the only way to know the difference | |
1072 | * between a "---" that is part of a patch, and a "---" that starts | |
1073 | * the next patch is to look at the line counts.. | |
c1bb9350 | 1074 | */ |
81bf96bb JH |
1075 | static int parse_fragment(char *line, unsigned long size, |
1076 | struct patch *patch, struct fragment *fragment) | |
c1bb9350 | 1077 | { |
3f40315a | 1078 | int added, deleted; |
c1bb9350 | 1079 | int len = linelen(line, size), offset; |
30996652 | 1080 | unsigned long oldlines, newlines; |
47495887 | 1081 | unsigned long leading, trailing; |
c1bb9350 | 1082 | |
19c58fb8 | 1083 | offset = parse_fragment_header(line, len, fragment); |
c1bb9350 LT |
1084 | if (offset < 0) |
1085 | return -1; | |
c14b9d1e JS |
1086 | if (offset > 0 && patch->recount) |
1087 | recount_diff(line + offset, size - offset, fragment); | |
19c58fb8 LT |
1088 | oldlines = fragment->oldlines; |
1089 | newlines = fragment->newlines; | |
47495887 EB |
1090 | leading = 0; |
1091 | trailing = 0; | |
c1bb9350 LT |
1092 | |
1093 | /* Parse the thing.. */ | |
1094 | line += len; | |
1095 | size -= len; | |
46979f56 | 1096 | linenr++; |
3f40315a | 1097 | added = deleted = 0; |
4be60962 JH |
1098 | for (offset = len; |
1099 | 0 < size; | |
1100 | offset += len, size -= len, line += len, linenr++) { | |
c1bb9350 LT |
1101 | if (!oldlines && !newlines) |
1102 | break; | |
1103 | len = linelen(line, size); | |
1104 | if (!len || line[len-1] != '\n') | |
1105 | return -1; | |
1106 | switch (*line) { | |
1107 | default: | |
1108 | return -1; | |
b507b465 | 1109 | case '\n': /* newer GNU diff, an empty context line */ |
c1bb9350 LT |
1110 | case ' ': |
1111 | oldlines--; | |
1112 | newlines--; | |
47495887 EB |
1113 | if (!deleted && !added) |
1114 | leading++; | |
1115 | trailing++; | |
c1bb9350 LT |
1116 | break; |
1117 | case '-': | |
5fda48d6 | 1118 | if (apply_in_reverse && |
81bf96bb | 1119 | ws_error_action != nowarn_ws_error) |
cf1b7869 | 1120 | check_whitespace(line, len, patch->ws_rule); |
3f40315a | 1121 | deleted++; |
c1bb9350 | 1122 | oldlines--; |
47495887 | 1123 | trailing = 0; |
c1bb9350 LT |
1124 | break; |
1125 | case '+': | |
5fda48d6 | 1126 | if (!apply_in_reverse && |
81bf96bb | 1127 | ws_error_action != nowarn_ws_error) |
cf1b7869 | 1128 | check_whitespace(line, len, patch->ws_rule); |
3f40315a | 1129 | added++; |
c1bb9350 | 1130 | newlines--; |
47495887 | 1131 | trailing = 0; |
c1bb9350 | 1132 | break; |
433ef8a2 | 1133 | |
81bf96bb JH |
1134 | /* |
1135 | * We allow "\ No newline at end of file". Depending | |
433ef8a2 FK |
1136 | * on locale settings when the patch was produced we |
1137 | * don't know what this line looks like. The only | |
56d33b11 JH |
1138 | * thing we do know is that it begins with "\ ". |
1139 | * Checking for 12 is just for sanity check -- any | |
1140 | * l10n of "\ No newline..." is at least that long. | |
1141 | */ | |
fab2c257 | 1142 | case '\\': |
433ef8a2 | 1143 | if (len < 12 || memcmp(line, "\\ ", 2)) |
3cca928d | 1144 | return -1; |
fab2c257 | 1145 | break; |
c1bb9350 LT |
1146 | } |
1147 | } | |
c1504628 LT |
1148 | if (oldlines || newlines) |
1149 | return -1; | |
47495887 EB |
1150 | fragment->leading = leading; |
1151 | fragment->trailing = trailing; | |
1152 | ||
81bf96bb JH |
1153 | /* |
1154 | * If a fragment ends with an incomplete line, we failed to include | |
8b64647d JH |
1155 | * it in the above loop because we hit oldlines == newlines == 0 |
1156 | * before seeing it. | |
1157 | */ | |
433ef8a2 | 1158 | if (12 < size && !memcmp(line, "\\ ", 2)) |
8b64647d JH |
1159 | offset += linelen(line, size); |
1160 | ||
3f40315a LT |
1161 | patch->lines_added += added; |
1162 | patch->lines_deleted += deleted; | |
4be60962 JH |
1163 | |
1164 | if (0 < patch->is_new && oldlines) | |
1165 | return error("new file depends on old contents"); | |
1166 | if (0 < patch->is_delete && newlines) | |
1167 | return error("deleted file still has contents"); | |
c1bb9350 LT |
1168 | return offset; |
1169 | } | |
1170 | ||
19c58fb8 | 1171 | static int parse_single_patch(char *line, unsigned long size, struct patch *patch) |
c1bb9350 LT |
1172 | { |
1173 | unsigned long offset = 0; | |
4be60962 | 1174 | unsigned long oldlines = 0, newlines = 0, context = 0; |
19c58fb8 | 1175 | struct fragment **fragp = &patch->fragments; |
c1bb9350 LT |
1176 | |
1177 | while (size > 4 && !memcmp(line, "@@ -", 4)) { | |
19c58fb8 LT |
1178 | struct fragment *fragment; |
1179 | int len; | |
1180 | ||
90321c10 | 1181 | fragment = xcalloc(1, sizeof(*fragment)); |
19c58fb8 | 1182 | len = parse_fragment(line, size, patch, fragment); |
c1bb9350 | 1183 | if (len <= 0) |
46979f56 | 1184 | die("corrupt patch at line %d", linenr); |
19c58fb8 LT |
1185 | fragment->patch = line; |
1186 | fragment->size = len; | |
4be60962 JH |
1187 | oldlines += fragment->oldlines; |
1188 | newlines += fragment->newlines; | |
1189 | context += fragment->leading + fragment->trailing; | |
19c58fb8 LT |
1190 | |
1191 | *fragp = fragment; | |
1192 | fragp = &fragment->next; | |
c1bb9350 LT |
1193 | |
1194 | offset += len; | |
1195 | line += len; | |
1196 | size -= len; | |
1197 | } | |
4be60962 JH |
1198 | |
1199 | /* | |
1200 | * If something was removed (i.e. we have old-lines) it cannot | |
1201 | * be creation, and if something was added it cannot be | |
1202 | * deletion. However, the reverse is not true; --unified=0 | |
1203 | * patches that only add are not necessarily creation even | |
1204 | * though they do not have any old lines, and ones that only | |
1205 | * delete are not necessarily deletion. | |
1206 | * | |
1207 | * Unfortunately, a real creation/deletion patch do _not_ have | |
1208 | * any context line by definition, so we cannot safely tell it | |
1209 | * apart with --unified=0 insanity. At least if the patch has | |
1210 | * more than one hunk it is not creation or deletion. | |
1211 | */ | |
1212 | if (patch->is_new < 0 && | |
1213 | (oldlines || (patch->fragments && patch->fragments->next))) | |
1214 | patch->is_new = 0; | |
1215 | if (patch->is_delete < 0 && | |
1216 | (newlines || (patch->fragments && patch->fragments->next))) | |
1217 | patch->is_delete = 0; | |
4be60962 JH |
1218 | |
1219 | if (0 < patch->is_new && oldlines) | |
1220 | die("new file %s depends on old contents", patch->new_name); | |
1221 | if (0 < patch->is_delete && newlines) | |
1222 | die("deleted file %s still has contents", patch->old_name); | |
1223 | if (!patch->is_delete && !newlines && context) | |
1224 | fprintf(stderr, "** warning: file %s becomes empty but " | |
1225 | "is not deleted\n", patch->new_name); | |
1226 | ||
c1bb9350 LT |
1227 | return offset; |
1228 | } | |
1229 | ||
1fea629f LT |
1230 | static inline int metadata_changes(struct patch *patch) |
1231 | { | |
1232 | return patch->is_rename > 0 || | |
1233 | patch->is_copy > 0 || | |
1234 | patch->is_new > 0 || | |
1235 | patch->is_delete || | |
1236 | (patch->old_mode && patch->new_mode && | |
1237 | patch->old_mode != patch->new_mode); | |
1238 | } | |
1239 | ||
3cd4f5e8 JH |
1240 | static char *inflate_it(const void *data, unsigned long size, |
1241 | unsigned long inflated_size) | |
051308f6 | 1242 | { |
3cd4f5e8 JH |
1243 | z_stream stream; |
1244 | void *out; | |
1245 | int st; | |
1246 | ||
1247 | memset(&stream, 0, sizeof(stream)); | |
1248 | ||
1249 | stream.next_in = (unsigned char *)data; | |
1250 | stream.avail_in = size; | |
1251 | stream.next_out = out = xmalloc(inflated_size); | |
1252 | stream.avail_out = inflated_size; | |
1253 | inflateInit(&stream); | |
1254 | st = inflate(&stream, Z_FINISH); | |
1255 | if ((st != Z_STREAM_END) || stream.total_out != inflated_size) { | |
1256 | free(out); | |
1257 | return NULL; | |
1258 | } | |
1259 | return out; | |
1260 | } | |
1261 | ||
1262 | static struct fragment *parse_binary_hunk(char **buf_p, | |
1263 | unsigned long *sz_p, | |
1264 | int *status_p, | |
1265 | int *used_p) | |
1266 | { | |
81bf96bb JH |
1267 | /* |
1268 | * Expect a line that begins with binary patch method ("literal" | |
3cd4f5e8 JH |
1269 | * or "delta"), followed by the length of data before deflating. |
1270 | * a sequence of 'length-byte' followed by base-85 encoded data | |
1271 | * should follow, terminated by a newline. | |
051308f6 JH |
1272 | * |
1273 | * Each 5-byte sequence of base-85 encodes up to 4 bytes, | |
1274 | * and we would limit the patch line to 66 characters, | |
1275 | * so one line can fit up to 13 groups that would decode | |
1276 | * to 52 bytes max. The length byte 'A'-'Z' corresponds | |
1277 | * to 1-26 bytes, and 'a'-'z' corresponds to 27-52 bytes. | |
051308f6 JH |
1278 | */ |
1279 | int llen, used; | |
3cd4f5e8 JH |
1280 | unsigned long size = *sz_p; |
1281 | char *buffer = *buf_p; | |
1282 | int patch_method; | |
1283 | unsigned long origlen; | |
0660626c | 1284 | char *data = NULL; |
3cd4f5e8 JH |
1285 | int hunk_size = 0; |
1286 | struct fragment *frag; | |
051308f6 | 1287 | |
0660626c JH |
1288 | llen = linelen(buffer, size); |
1289 | used = llen; | |
3cd4f5e8 JH |
1290 | |
1291 | *status_p = 0; | |
0660626c | 1292 | |
cc44c765 | 1293 | if (!prefixcmp(buffer, "delta ")) { |
3cd4f5e8 JH |
1294 | patch_method = BINARY_DELTA_DEFLATED; |
1295 | origlen = strtoul(buffer + 6, NULL, 10); | |
0660626c | 1296 | } |
cc44c765 | 1297 | else if (!prefixcmp(buffer, "literal ")) { |
3cd4f5e8 JH |
1298 | patch_method = BINARY_LITERAL_DEFLATED; |
1299 | origlen = strtoul(buffer + 8, NULL, 10); | |
0660626c JH |
1300 | } |
1301 | else | |
3cd4f5e8 JH |
1302 | return NULL; |
1303 | ||
1304 | linenr++; | |
0660626c | 1305 | buffer += llen; |
051308f6 JH |
1306 | while (1) { |
1307 | int byte_length, max_byte_length, newsize; | |
1308 | llen = linelen(buffer, size); | |
1309 | used += llen; | |
1310 | linenr++; | |
03eb8f8a JH |
1311 | if (llen == 1) { |
1312 | /* consume the blank line */ | |
1313 | buffer++; | |
1314 | size--; | |
051308f6 | 1315 | break; |
03eb8f8a | 1316 | } |
81bf96bb JH |
1317 | /* |
1318 | * Minimum line is "A00000\n" which is 7-byte long, | |
051308f6 JH |
1319 | * and the line length must be multiple of 5 plus 2. |
1320 | */ | |
1321 | if ((llen < 7) || (llen-2) % 5) | |
1322 | goto corrupt; | |
1323 | max_byte_length = (llen - 2) / 5 * 4; | |
1324 | byte_length = *buffer; | |
1325 | if ('A' <= byte_length && byte_length <= 'Z') | |
1326 | byte_length = byte_length - 'A' + 1; | |
1327 | else if ('a' <= byte_length && byte_length <= 'z') | |
1328 | byte_length = byte_length - 'a' + 27; | |
1329 | else | |
1330 | goto corrupt; | |
1331 | /* if the input length was not multiple of 4, we would | |
1332 | * have filler at the end but the filler should never | |
1333 | * exceed 3 bytes | |
1334 | */ | |
1335 | if (max_byte_length < byte_length || | |
1336 | byte_length <= max_byte_length - 4) | |
1337 | goto corrupt; | |
3cd4f5e8 | 1338 | newsize = hunk_size + byte_length; |
0660626c | 1339 | data = xrealloc(data, newsize); |
3cd4f5e8 | 1340 | if (decode_85(data + hunk_size, buffer + 1, byte_length)) |
051308f6 | 1341 | goto corrupt; |
3cd4f5e8 | 1342 | hunk_size = newsize; |
051308f6 JH |
1343 | buffer += llen; |
1344 | size -= llen; | |
1345 | } | |
3cd4f5e8 JH |
1346 | |
1347 | frag = xcalloc(1, sizeof(*frag)); | |
1348 | frag->patch = inflate_it(data, hunk_size, origlen); | |
1349 | if (!frag->patch) | |
1350 | goto corrupt; | |
1351 | free(data); | |
1352 | frag->size = origlen; | |
1353 | *buf_p = buffer; | |
1354 | *sz_p = size; | |
1355 | *used_p = used; | |
1356 | frag->binary_patch_method = patch_method; | |
1357 | return frag; | |
1358 | ||
051308f6 | 1359 | corrupt: |
4cac42b1 | 1360 | free(data); |
3cd4f5e8 JH |
1361 | *status_p = -1; |
1362 | error("corrupt binary patch at line %d: %.*s", | |
1363 | linenr-1, llen-1, buffer); | |
1364 | return NULL; | |
1365 | } | |
1366 | ||
1367 | static int parse_binary(char *buffer, unsigned long size, struct patch *patch) | |
1368 | { | |
81bf96bb JH |
1369 | /* |
1370 | * We have read "GIT binary patch\n"; what follows is a line | |
3cd4f5e8 JH |
1371 | * that says the patch method (currently, either "literal" or |
1372 | * "delta") and the length of data before deflating; a | |
1373 | * sequence of 'length-byte' followed by base-85 encoded data | |
1374 | * follows. | |
1375 | * | |
1376 | * When a binary patch is reversible, there is another binary | |
1377 | * hunk in the same format, starting with patch method (either | |
1378 | * "literal" or "delta") with the length of data, and a sequence | |
1379 | * of length-byte + base-85 encoded data, terminated with another | |
1380 | * empty line. This data, when applied to the postimage, produces | |
1381 | * the preimage. | |
1382 | */ | |
1383 | struct fragment *forward; | |
1384 | struct fragment *reverse; | |
1385 | int status; | |
1386 | int used, used_1; | |
1387 | ||
1388 | forward = parse_binary_hunk(&buffer, &size, &status, &used); | |
1389 | if (!forward && !status) | |
1390 | /* there has to be one hunk (forward hunk) */ | |
1391 | return error("unrecognized binary patch at line %d", linenr-1); | |
1392 | if (status) | |
1393 | /* otherwise we already gave an error message */ | |
1394 | return status; | |
1395 | ||
1396 | reverse = parse_binary_hunk(&buffer, &size, &status, &used_1); | |
1397 | if (reverse) | |
1398 | used += used_1; | |
1399 | else if (status) { | |
81bf96bb JH |
1400 | /* |
1401 | * Not having reverse hunk is not an error, but having | |
3cd4f5e8 JH |
1402 | * a corrupt reverse hunk is. |
1403 | */ | |
1404 | free((void*) forward->patch); | |
1405 | free(forward); | |
1406 | return status; | |
1407 | } | |
1408 | forward->next = reverse; | |
1409 | patch->fragments = forward; | |
1410 | patch->is_binary = 1; | |
1411 | return used; | |
051308f6 JH |
1412 | } |
1413 | ||
19c58fb8 | 1414 | static int parse_chunk(char *buffer, unsigned long size, struct patch *patch) |
c1bb9350 LT |
1415 | { |
1416 | int hdrsize, patchsize; | |
19c58fb8 | 1417 | int offset = find_header(buffer, size, &hdrsize, patch); |
c1bb9350 LT |
1418 | |
1419 | if (offset < 0) | |
1420 | return offset; | |
c1bb9350 | 1421 | |
cf1b7869 JH |
1422 | patch->ws_rule = whitespace_rule(patch->new_name |
1423 | ? patch->new_name | |
1424 | : patch->old_name); | |
1425 | ||
81bf96bb JH |
1426 | patchsize = parse_single_patch(buffer + offset + hdrsize, |
1427 | size - offset - hdrsize, patch); | |
c1bb9350 | 1428 | |
92927ed0 | 1429 | if (!patchsize) { |
3200d1ae JH |
1430 | static const char *binhdr[] = { |
1431 | "Binary files ", | |
1432 | "Files ", | |
1433 | NULL, | |
1434 | }; | |
051308f6 | 1435 | static const char git_binary[] = "GIT binary patch\n"; |
3200d1ae JH |
1436 | int i; |
1437 | int hd = hdrsize + offset; | |
1438 | unsigned long llen = linelen(buffer + hd, size - hd); | |
1439 | ||
051308f6 JH |
1440 | if (llen == sizeof(git_binary) - 1 && |
1441 | !memcmp(git_binary, buffer + hd, llen)) { | |
1442 | int used; | |
1443 | linenr++; | |
1444 | used = parse_binary(buffer + hd + llen, | |
1445 | size - hd - llen, patch); | |
1446 | if (used) | |
1447 | patchsize = used + llen; | |
1448 | else | |
1449 | patchsize = 0; | |
1450 | } | |
1451 | else if (!memcmp(" differ\n", buffer + hd + llen - 8, 8)) { | |
3200d1ae JH |
1452 | for (i = 0; binhdr[i]; i++) { |
1453 | int len = strlen(binhdr[i]); | |
1454 | if (len < size - hd && | |
1455 | !memcmp(binhdr[i], buffer + hd, len)) { | |
051308f6 | 1456 | linenr++; |
3200d1ae | 1457 | patch->is_binary = 1; |
051308f6 | 1458 | patchsize = llen; |
3200d1ae JH |
1459 | break; |
1460 | } | |
1461 | } | |
051308f6 | 1462 | } |
ff36de08 | 1463 | |
2b6eef94 JH |
1464 | /* Empty patch cannot be applied if it is a text patch |
1465 | * without metadata change. A binary patch appears | |
1466 | * empty to us here. | |
92927ed0 JH |
1467 | */ |
1468 | if ((apply || check) && | |
2b6eef94 | 1469 | (!patch->is_binary && !metadata_changes(patch))) |
ff36de08 JH |
1470 | die("patch with only garbage at line %d", linenr); |
1471 | } | |
1fea629f | 1472 | |
c1bb9350 LT |
1473 | return offset + hdrsize + patchsize; |
1474 | } | |
1475 | ||
e5a94313 JS |
1476 | #define swap(a,b) myswap((a),(b),sizeof(a)) |
1477 | ||
1478 | #define myswap(a, b, size) do { \ | |
1479 | unsigned char mytmp[size]; \ | |
1480 | memcpy(mytmp, &a, size); \ | |
1481 | memcpy(&a, &b, size); \ | |
1482 | memcpy(&b, mytmp, size); \ | |
1483 | } while (0) | |
1484 | ||
1485 | static void reverse_patches(struct patch *p) | |
1486 | { | |
1487 | for (; p; p = p->next) { | |
1488 | struct fragment *frag = p->fragments; | |
1489 | ||
1490 | swap(p->new_name, p->old_name); | |
1491 | swap(p->new_mode, p->old_mode); | |
1492 | swap(p->is_new, p->is_delete); | |
1493 | swap(p->lines_added, p->lines_deleted); | |
1494 | swap(p->old_sha1_prefix, p->new_sha1_prefix); | |
1495 | ||
1496 | for (; frag; frag = frag->next) { | |
1497 | swap(frag->newpos, frag->oldpos); | |
1498 | swap(frag->newlines, frag->oldlines); | |
1499 | } | |
e5a94313 JS |
1500 | } |
1501 | } | |
1502 | ||
81bf96bb JH |
1503 | static const char pluses[] = |
1504 | "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"; | |
1505 | static const char minuses[]= | |
1506 | "----------------------------------------------------------------------"; | |
3f40315a LT |
1507 | |
1508 | static void show_stats(struct patch *patch) | |
1509 | { | |
663af342 PH |
1510 | struct strbuf qname; |
1511 | char *cp = patch->new_name ? patch->new_name : patch->old_name; | |
1512 | int max, add, del; | |
3f40315a | 1513 | |
663af342 PH |
1514 | strbuf_init(&qname, 0); |
1515 | quote_c_style(cp, &qname, NULL, 0); | |
22943f1a | 1516 | |
3f40315a LT |
1517 | /* |
1518 | * "scale" the filename | |
1519 | */ | |
3f40315a LT |
1520 | max = max_len; |
1521 | if (max > 50) | |
1522 | max = 50; | |
663af342 PH |
1523 | |
1524 | if (qname.len > max) { | |
1525 | cp = strchr(qname.buf + qname.len + 3 - max, '/'); | |
1526 | if (!cp) | |
1527 | cp = qname.buf + qname.len + 3 - max; | |
1528 | strbuf_splice(&qname, 0, cp - qname.buf, "...", 3); | |
1529 | } | |
1530 | ||
1531 | if (patch->is_binary) { | |
1532 | printf(" %-*s | Bin\n", max, qname.buf); | |
1533 | strbuf_release(&qname); | |
1534 | return; | |
62917097 | 1535 | } |
663af342 PH |
1536 | |
1537 | printf(" %-*s |", max, qname.buf); | |
1538 | strbuf_release(&qname); | |
3f40315a LT |
1539 | |
1540 | /* | |
1541 | * scale the add/delete | |
1542 | */ | |
663af342 | 1543 | max = max + max_change > 70 ? 70 - max : max_change; |
95bedc9e LT |
1544 | add = patch->lines_added; |
1545 | del = patch->lines_deleted; | |
95bedc9e | 1546 | |
69f956e1 | 1547 | if (max_change > 0) { |
663af342 | 1548 | int total = ((add + del) * max + max_change / 2) / max_change; |
69f956e1 SV |
1549 | add = (add * max + max_change / 2) / max_change; |
1550 | del = total - add; | |
1551 | } | |
663af342 PH |
1552 | printf("%5d %.*s%.*s\n", patch->lines_added + patch->lines_deleted, |
1553 | add, pluses, del, minuses); | |
3f40315a LT |
1554 | } |
1555 | ||
c7f9cb14 | 1556 | static int read_old_data(struct stat *st, const char *path, struct strbuf *buf) |
3cca928d | 1557 | { |
3cca928d LT |
1558 | switch (st->st_mode & S_IFMT) { |
1559 | case S_IFLNK: | |
c7f9cb14 PH |
1560 | strbuf_grow(buf, st->st_size); |
1561 | if (readlink(path, buf->buf, st->st_size) != st->st_size) | |
1562 | return -1; | |
1563 | strbuf_setlen(buf, st->st_size); | |
1564 | return 0; | |
3cca928d | 1565 | case S_IFREG: |
387e7e19 PH |
1566 | if (strbuf_read_file(buf, path, st->st_size) != st->st_size) |
1567 | return error("unable to open or read %s", path); | |
21e5ad50 | 1568 | convert_to_git(path, buf->buf, buf->len, buf, 0); |
c7f9cb14 | 1569 | return 0; |
3cca928d LT |
1570 | default: |
1571 | return -1; | |
1572 | } | |
1573 | } | |
1574 | ||
c1beba5b JH |
1575 | static void update_pre_post_images(struct image *preimage, |
1576 | struct image *postimage, | |
1577 | char *buf, | |
1578 | size_t len) | |
3cca928d | 1579 | { |
c1beba5b JH |
1580 | int i, ctx; |
1581 | char *new, *old, *fixed; | |
1582 | struct image fixed_preimage; | |
3cca928d | 1583 | |
c1beba5b JH |
1584 | /* |
1585 | * Update the preimage with whitespace fixes. Note that we | |
1586 | * are not losing preimage->buf -- apply_one_fragment() will | |
1587 | * free "oldlines". | |
1588 | */ | |
1589 | prepare_image(&fixed_preimage, buf, len, 1); | |
1590 | assert(fixed_preimage.nr == preimage->nr); | |
1591 | for (i = 0; i < preimage->nr; i++) | |
1592 | fixed_preimage.line[i].flag = preimage->line[i].flag; | |
1593 | free(preimage->line_allocated); | |
1594 | *preimage = fixed_preimage; | |
3cca928d | 1595 | |
c1beba5b JH |
1596 | /* |
1597 | * Adjust the common context lines in postimage, in place. | |
1598 | * This is possible because whitespace fixing does not make | |
1599 | * the string grow. | |
1600 | */ | |
1601 | new = old = postimage->buf; | |
1602 | fixed = preimage->buf; | |
1603 | for (i = ctx = 0; i < postimage->nr; i++) { | |
1604 | size_t len = postimage->line[i].len; | |
1605 | if (!(postimage->line[i].flag & LINE_COMMON)) { | |
1606 | /* an added line -- no counterparts in preimage */ | |
1607 | memmove(new, old, len); | |
1608 | old += len; | |
1609 | new += len; | |
1610 | continue; | |
3cca928d | 1611 | } |
c1beba5b JH |
1612 | |
1613 | /* a common context -- skip it in the original postimage */ | |
1614 | old += len; | |
1615 | ||
1616 | /* and find the corresponding one in the fixed preimage */ | |
1617 | while (ctx < preimage->nr && | |
1618 | !(preimage->line[ctx].flag & LINE_COMMON)) { | |
1619 | fixed += preimage->line[ctx].len; | |
1620 | ctx++; | |
1621 | } | |
1622 | if (preimage->nr <= ctx) | |
1623 | die("oops"); | |
1624 | ||
1625 | /* and copy it in, while fixing the line length */ | |
1626 | len = preimage->line[ctx].len; | |
1627 | memcpy(new, fixed, len); | |
1628 | new += len; | |
1629 | fixed += len; | |
1630 | postimage->line[i].len = len; | |
1631 | ctx++; | |
1632 | } | |
1633 | ||
1634 | /* Fix the length of the whole thing */ | |
1635 | postimage->len = new - postimage->buf; | |
1636 | } | |
1637 | ||
b94f2eda JH |
1638 | static int match_fragment(struct image *img, |
1639 | struct image *preimage, | |
1640 | struct image *postimage, | |
c89fb6b1 | 1641 | unsigned long try, |
b94f2eda | 1642 | int try_lno, |
c607aaa2 | 1643 | unsigned ws_rule, |
dc41976a | 1644 | int match_beginning, int match_end) |
c89fb6b1 | 1645 | { |
b94f2eda | 1646 | int i; |
c1beba5b | 1647 | char *fixed_buf, *buf, *orig, *target; |
b94f2eda JH |
1648 | |
1649 | if (preimage->nr + try_lno > img->nr) | |
1650 | return 0; | |
1651 | ||
1652 | if (match_beginning && try_lno) | |
c89fb6b1 | 1653 | return 0; |
dc41976a | 1654 | |
b94f2eda JH |
1655 | if (match_end && preimage->nr + try_lno != img->nr) |
1656 | return 0; | |
1657 | ||
1658 | /* Quick hash check */ | |
1659 | for (i = 0; i < preimage->nr; i++) | |
1660 | if (preimage->line[i].hash != img->line[try_lno + i].hash) | |
1661 | return 0; | |
1662 | ||
dc41976a JH |
1663 | /* |
1664 | * Do we have an exact match? If we were told to match | |
1665 | * at the end, size must be exactly at try+fragsize, | |
1666 | * otherwise try+fragsize must be still within the preimage, | |
1667 | * and either case, the old piece should match the preimage | |
1668 | * exactly. | |
1669 | */ | |
1670 | if ((match_end | |
b94f2eda JH |
1671 | ? (try + preimage->len == img->len) |
1672 | : (try + preimage->len <= img->len)) && | |
1673 | !memcmp(img->buf + try, preimage->buf, preimage->len)) | |
dc41976a JH |
1674 | return 1; |
1675 | ||
c1beba5b JH |
1676 | if (ws_error_action != correct_ws_error) |
1677 | return 0; | |
1678 | ||
dc41976a | 1679 | /* |
c1beba5b JH |
1680 | * The hunk does not apply byte-by-byte, but the hash says |
1681 | * it might with whitespace fuzz. | |
dc41976a | 1682 | */ |
c1beba5b JH |
1683 | fixed_buf = xmalloc(preimage->len + 1); |
1684 | buf = fixed_buf; | |
1685 | orig = preimage->buf; | |
1686 | target = img->buf + try; | |
1687 | for (i = 0; i < preimage->nr; i++) { | |
1688 | size_t fixlen; /* length after fixing the preimage */ | |
1689 | size_t oldlen = preimage->line[i].len; | |
1690 | size_t tgtlen = img->line[try_lno + i].len; | |
1691 | size_t tgtfixlen; /* length after fixing the target line */ | |
1692 | char tgtfixbuf[1024], *tgtfix; | |
1693 | int match; | |
1694 | ||
1695 | /* Try fixing the line in the preimage */ | |
fe3403c3 | 1696 | fixlen = ws_fix_copy(buf, orig, oldlen, ws_rule, NULL); |
c1beba5b JH |
1697 | |
1698 | /* Try fixing the line in the target */ | |
1699 | if (sizeof(tgtfixbuf) < tgtlen) | |
1700 | tgtfix = tgtfixbuf; | |
1701 | else | |
1702 | tgtfix = xmalloc(tgtlen); | |
fe3403c3 | 1703 | tgtfixlen = ws_fix_copy(tgtfix, target, tgtlen, ws_rule, NULL); |
c1beba5b JH |
1704 | |
1705 | /* | |
1706 | * If they match, either the preimage was based on | |
1707 | * a version before our tree fixed whitespace breakage, | |
1708 | * or we are lacking a whitespace-fix patch the tree | |
1709 | * the preimage was based on already had (i.e. target | |
1710 | * has whitespace breakage, the preimage doesn't). | |
1711 | * In either case, we are fixing the whitespace breakages | |
1712 | * so we might as well take the fix together with their | |
1713 | * real change. | |
1714 | */ | |
1715 | match = (tgtfixlen == fixlen && !memcmp(tgtfix, buf, fixlen)); | |
1716 | ||
1717 | if (tgtfix != tgtfixbuf) | |
1718 | free(tgtfix); | |
1719 | if (!match) | |
1720 | goto unmatch_exit; | |
1721 | ||
1722 | orig += oldlen; | |
1723 | buf += fixlen; | |
1724 | target += tgtlen; | |
3cca928d LT |
1725 | } |
1726 | ||
c1beba5b JH |
1727 | /* |
1728 | * Yes, the preimage is based on an older version that still | |
1729 | * has whitespace breakages unfixed, and fixing them makes the | |
1730 | * hunk match. Update the context lines in the postimage. | |
1731 | */ | |
1732 | update_pre_post_images(preimage, postimage, | |
1733 | fixed_buf, buf - fixed_buf); | |
1734 | return 1; | |
1735 | ||
1736 | unmatch_exit: | |
1737 | free(fixed_buf); | |
dc41976a | 1738 | return 0; |
c89fb6b1 JH |
1739 | } |
1740 | ||
b94f2eda JH |
1741 | static int find_pos(struct image *img, |
1742 | struct image *preimage, | |
1743 | struct image *postimage, | |
1744 | int line, | |
c607aaa2 | 1745 | unsigned ws_rule, |
b94f2eda | 1746 | int match_beginning, int match_end) |
3cca928d | 1747 | { |
b94f2eda JH |
1748 | int i; |
1749 | unsigned long backwards, forwards, try; | |
1750 | int backwards_lno, forwards_lno, try_lno; | |
3cca928d | 1751 | |
b94f2eda | 1752 | if (preimage->nr > img->nr) |
3cca928d LT |
1753 | return -1; |
1754 | ||
ecf4c2ec JH |
1755 | /* |
1756 | * If match_begining or match_end is specified, there is no | |
1757 | * point starting from a wrong line that will never match and | |
1758 | * wander around and wait for a match at the specified end. | |
1759 | */ | |
1760 | if (match_beginning) | |
1761 | line = 0; | |
1762 | else if (match_end) | |
1763 | line = img->nr - preimage->nr; | |
1764 | ||
52f3c81a JH |
1765 | if (line > img->nr) |
1766 | line = img->nr; | |
1767 | ||
b94f2eda JH |
1768 | try = 0; |
1769 | for (i = 0; i < line; i++) | |
1770 | try += img->line[i].len; | |
3cca928d | 1771 | |
6e7c92a9 LT |
1772 | /* |
1773 | * There's probably some smart way to do this, but I'll leave | |
1774 | * that to the smart and beautiful people. I'm simple and stupid. | |
1775 | */ | |
b94f2eda JH |
1776 | backwards = try; |
1777 | backwards_lno = line; | |
1778 | forwards = try; | |
1779 | forwards_lno = line; | |
1780 | try_lno = line; | |
fcb77bc5 | 1781 | |
6e7c92a9 | 1782 | for (i = 0; ; i++) { |
b94f2eda | 1783 | if (match_fragment(img, preimage, postimage, |
c607aaa2 | 1784 | try, try_lno, ws_rule, |
b94f2eda JH |
1785 | match_beginning, match_end)) |
1786 | return try_lno; | |
fcb77bc5 JH |
1787 | |
1788 | again: | |
b94f2eda | 1789 | if (backwards_lno == 0 && forwards_lno == img->nr) |
fcb77bc5 | 1790 | break; |
6e7c92a9 | 1791 | |
6e7c92a9 | 1792 | if (i & 1) { |
b94f2eda | 1793 | if (backwards_lno == 0) { |
fcb77bc5 JH |
1794 | i++; |
1795 | goto again; | |
6e7c92a9 | 1796 | } |
b94f2eda JH |
1797 | backwards_lno--; |
1798 | backwards -= img->line[backwards_lno].len; | |
6e7c92a9 | 1799 | try = backwards; |
b94f2eda | 1800 | try_lno = backwards_lno; |
6e7c92a9 | 1801 | } else { |
b94f2eda | 1802 | if (forwards_lno == img->nr) { |
fcb77bc5 JH |
1803 | i++; |
1804 | goto again; | |
6e7c92a9 | 1805 | } |
b94f2eda JH |
1806 | forwards += img->line[forwards_lno].len; |
1807 | forwards_lno++; | |
6e7c92a9 | 1808 | try = forwards; |
b94f2eda | 1809 | try_lno = forwards_lno; |
6e7c92a9 LT |
1810 | } |
1811 | ||
6e7c92a9 | 1812 | } |
3cca928d LT |
1813 | return -1; |
1814 | } | |
1815 | ||
b94f2eda | 1816 | static void remove_first_line(struct image *img) |
47495887 | 1817 | { |
b94f2eda JH |
1818 | img->buf += img->line[0].len; |
1819 | img->len -= img->line[0].len; | |
1820 | img->line++; | |
1821 | img->nr--; | |
47495887 EB |
1822 | } |
1823 | ||
b94f2eda | 1824 | static void remove_last_line(struct image *img) |
47495887 | 1825 | { |
b94f2eda | 1826 | img->len -= img->line[--img->nr].len; |
47495887 EB |
1827 | } |
1828 | ||
b94f2eda JH |
1829 | static void update_image(struct image *img, |
1830 | int applied_pos, | |
1831 | struct image *preimage, | |
1832 | struct image *postimage) | |
b5767dd6 | 1833 | { |
81bf96bb | 1834 | /* |
b94f2eda JH |
1835 | * remove the copy of preimage at offset in img |
1836 | * and replace it with postimage | |
81bf96bb | 1837 | */ |
b94f2eda JH |
1838 | int i, nr; |
1839 | size_t remove_count, insert_count, applied_at = 0; | |
1840 | char *result; | |
d5a41641 | 1841 | |
b94f2eda JH |
1842 | for (i = 0; i < applied_pos; i++) |
1843 | applied_at += img->line[i].len; | |
1844 | ||
1845 | remove_count = 0; | |
1846 | for (i = 0; i < preimage->nr; i++) | |
1847 | remove_count += img->line[applied_pos + i].len; | |
1848 | insert_count = postimage->len; | |
1849 | ||
1850 | /* Adjust the contents */ | |
1851 | result = xmalloc(img->len + insert_count - remove_count + 1); | |
1852 | memcpy(result, img->buf, applied_at); | |
1853 | memcpy(result + applied_at, postimage->buf, postimage->len); | |
1854 | memcpy(result + applied_at + postimage->len, | |
1855 | img->buf + (applied_at + remove_count), | |
1856 | img->len - (applied_at + remove_count)); | |
1857 | free(img->buf); | |
1858 | img->buf = result; | |
1859 | img->len += insert_count - remove_count; | |
1860 | result[img->len] = '\0'; | |
1861 | ||
1862 | /* Adjust the line table */ | |
1863 | nr = img->nr + postimage->nr - preimage->nr; | |
1864 | if (preimage->nr < postimage->nr) { | |
81bf96bb | 1865 | /* |
b94f2eda JH |
1866 | * NOTE: this knows that we never call remove_first_line() |
1867 | * on anything other than pre/post image. | |
d0c25035 | 1868 | */ |
b94f2eda JH |
1869 | img->line = xrealloc(img->line, nr * sizeof(*img->line)); |
1870 | img->line_allocated = img->line; | |
d0c25035 | 1871 | } |
b94f2eda JH |
1872 | if (preimage->nr != postimage->nr) |
1873 | memmove(img->line + applied_pos + postimage->nr, | |
1874 | img->line + applied_pos + preimage->nr, | |
1875 | (img->nr - (applied_pos + preimage->nr)) * | |
1876 | sizeof(*img->line)); | |
1877 | memcpy(img->line + applied_pos, | |
1878 | postimage->line, | |
1879 | postimage->nr * sizeof(*img->line)); | |
1880 | img->nr = nr; | |
b5767dd6 JH |
1881 | } |
1882 | ||
b94f2eda | 1883 | static int apply_one_fragment(struct image *img, struct fragment *frag, |
cf1b7869 | 1884 | int inaccurate_eof, unsigned ws_rule) |
3cca928d | 1885 | { |
65aadb92 | 1886 | int match_beginning, match_end; |
3cca928d | 1887 | const char *patch = frag->patch; |
b94f2eda | 1888 | int size = frag->size; |
61e08cca | 1889 | char *old, *new, *oldlines, *newlines; |
077e1af5 | 1890 | int new_blank_lines_at_end = 0; |
47495887 | 1891 | unsigned long leading, trailing; |
b94f2eda JH |
1892 | int pos, applied_pos; |
1893 | struct image preimage; | |
1894 | struct image postimage; | |
3cca928d | 1895 | |
c330fdd4 JH |
1896 | memset(&preimage, 0, sizeof(preimage)); |
1897 | memset(&postimage, 0, sizeof(postimage)); | |
61e08cca JH |
1898 | oldlines = xmalloc(size); |
1899 | newlines = xmalloc(size); | |
c330fdd4 | 1900 | |
61e08cca JH |
1901 | old = oldlines; |
1902 | new = newlines; | |
3cca928d | 1903 | while (size > 0) { |
e5a94313 | 1904 | char first; |
3cca928d | 1905 | int len = linelen(patch, size); |
8441a9a8 | 1906 | int plen, added; |
077e1af5 | 1907 | int added_blank_line = 0; |
3cca928d LT |
1908 | |
1909 | if (!len) | |
1910 | break; | |
1911 | ||
1912 | /* | |
1913 | * "plen" is how much of the line we should use for | |
1914 | * the actual patch data. Normally we just remove the | |
1915 | * first character on the line, but if the line is | |
1916 | * followed by "\ No newline", then we also remove the | |
1917 | * last one (which is the newline, of course). | |
1918 | */ | |
61e08cca | 1919 | plen = len - 1; |
8b64647d | 1920 | if (len < size && patch[len] == '\\') |
3cca928d | 1921 | plen--; |
e5a94313 | 1922 | first = *patch; |
f686d030 | 1923 | if (apply_in_reverse) { |
e5a94313 JS |
1924 | if (first == '-') |
1925 | first = '+'; | |
1926 | else if (first == '+') | |
1927 | first = '-'; | |
1928 | } | |
efe7f358 | 1929 | |
e5a94313 | 1930 | switch (first) { |
b507b465 LT |
1931 | case '\n': |
1932 | /* Newer GNU diff, empty context line */ | |
1933 | if (plen < 0) | |
1934 | /* ... followed by '\No newline'; nothing */ | |
1935 | break; | |
61e08cca JH |
1936 | *old++ = '\n'; |
1937 | *new++ = '\n'; | |
c330fdd4 JH |
1938 | add_line_info(&preimage, "\n", 1, LINE_COMMON); |
1939 | add_line_info(&postimage, "\n", 1, LINE_COMMON); | |
b507b465 | 1940 | break; |
3cca928d LT |
1941 | case ' ': |
1942 | case '-': | |
61e08cca JH |
1943 | memcpy(old, patch + 1, plen); |
1944 | add_line_info(&preimage, old, plen, | |
c330fdd4 | 1945 | (first == ' ' ? LINE_COMMON : 0)); |
61e08cca | 1946 | old += plen; |
e5a94313 | 1947 | if (first == '-') |
3cca928d LT |
1948 | break; |
1949 | /* Fall-through for ' ' */ | |
1950 | case '+': | |
8441a9a8 JH |
1951 | /* --no-add does not add new lines */ |
1952 | if (first == '+' && no_add) | |
1953 | break; | |
1954 | ||
1955 | if (first != '+' || | |
1956 | !whitespace_error || | |
1957 | ws_error_action != correct_ws_error) { | |
1958 | memcpy(new, patch + 1, plen); | |
1959 | added = plen; | |
1960 | } | |
1961 | else { | |
fe3403c3 | 1962 | added = ws_fix_copy(new, patch + 1, plen, ws_rule, &applied_after_fixing_ws); |
077e1af5 | 1963 | } |
8441a9a8 JH |
1964 | add_line_info(&postimage, new, added, |
1965 | (first == '+' ? 0 : LINE_COMMON)); | |
1966 | new += added; | |
1967 | if (first == '+' && | |
1968 | added == 1 && new[-1] == '\n') | |
1969 | added_blank_line = 1; | |
3cca928d LT |
1970 | break; |
1971 | case '@': case '\\': | |
1972 | /* Ignore it, we already handled it */ | |
1973 | break; | |
1974 | default: | |
aeabfa07 JS |
1975 | if (apply_verbosely) |
1976 | error("invalid start of line: '%c'", first); | |
3cca928d LT |
1977 | return -1; |
1978 | } | |
077e1af5 JH |
1979 | if (added_blank_line) |
1980 | new_blank_lines_at_end++; | |
1981 | else | |
1982 | new_blank_lines_at_end = 0; | |
3cca928d LT |
1983 | patch += len; |
1984 | size -= len; | |
1985 | } | |
81bf96bb | 1986 | if (inaccurate_eof && |
61e08cca JH |
1987 | old > oldlines && old[-1] == '\n' && |
1988 | new > newlines && new[-1] == '\n') { | |
1989 | old--; | |
1990 | new--; | |
5b5d4d9e | 1991 | } |
47495887 | 1992 | |
47495887 EB |
1993 | leading = frag->leading; |
1994 | trailing = frag->trailing; | |
1bf1a859 LT |
1995 | |
1996 | /* | |
ee5a317e JH |
1997 | * A hunk to change lines at the beginning would begin with |
1998 | * @@ -1,L +N,M @@ | |
4be60962 | 1999 | * |
ee5a317e JH |
2000 | * And a hunk to add to an empty file would begin with |
2001 | * @@ -0,0 +N,M @@ | |
2002 | * | |
2003 | * In other words, a hunk that is (frag->oldpos <= 1) with or | |
2004 | * without leading context must match at the beginning. | |
1bf1a859 | 2005 | */ |
ee5a317e JH |
2006 | match_beginning = frag->oldpos <= 1; |
2007 | ||
2008 | /* | |
2009 | * A hunk without trailing lines must match at the end. | |
2010 | * However, we simply cannot tell if a hunk must match end | |
2011 | * from the lack of trailing lines if the patch was generated | |
2012 | * with unidiff without any context. | |
2013 | */ | |
2014 | match_end = !unidiff_zero && !trailing; | |
1bf1a859 | 2015 | |
b94f2eda | 2016 | pos = frag->newpos ? (frag->newpos - 1) : 0; |
61e08cca JH |
2017 | preimage.buf = oldlines; |
2018 | preimage.len = old - oldlines; | |
2019 | postimage.buf = newlines; | |
2020 | postimage.len = new - newlines; | |
c330fdd4 JH |
2021 | preimage.line = preimage.line_allocated; |
2022 | postimage.line = postimage.line_allocated; | |
2023 | ||
47495887 | 2024 | for (;;) { |
efe7f358 | 2025 | |
c607aaa2 JH |
2026 | applied_pos = find_pos(img, &preimage, &postimage, pos, |
2027 | ws_rule, match_beginning, match_end); | |
b94f2eda JH |
2028 | |
2029 | if (applied_pos >= 0) | |
47495887 | 2030 | break; |
47495887 EB |
2031 | |
2032 | /* Am I at my context limits? */ | |
2033 | if ((leading <= p_context) && (trailing <= p_context)) | |
2034 | break; | |
65aadb92 JH |
2035 | if (match_beginning || match_end) { |
2036 | match_beginning = match_end = 0; | |
1bf1a859 LT |
2037 | continue; |
2038 | } | |
b94f2eda | 2039 | |
81bf96bb JH |
2040 | /* |
2041 | * Reduce the number of context lines; reduce both | |
2042 | * leading and trailing if they are equal otherwise | |
2043 | * just reduce the larger context. | |
47495887 EB |
2044 | */ |
2045 | if (leading >= trailing) { | |
b94f2eda JH |
2046 | remove_first_line(&preimage); |
2047 | remove_first_line(&postimage); | |
47495887 EB |
2048 | pos--; |
2049 | leading--; | |
2050 | } | |
2051 | if (trailing > leading) { | |
b94f2eda JH |
2052 | remove_last_line(&preimage); |
2053 | remove_last_line(&postimage); | |
47495887 | 2054 | trailing--; |
6e7c92a9 | 2055 | } |
3cca928d LT |
2056 | } |
2057 | ||
b94f2eda JH |
2058 | if (applied_pos >= 0) { |
2059 | if (ws_error_action == correct_ws_error && | |
2060 | new_blank_lines_at_end && | |
2061 | postimage.nr + applied_pos == img->nr) { | |
2062 | /* | |
2063 | * If the patch application adds blank lines | |
2064 | * at the end, and if the patch applies at the | |
2065 | * end of the image, remove those added blank | |
2066 | * lines. | |
2067 | */ | |
2068 | while (new_blank_lines_at_end--) | |
2069 | remove_last_line(&postimage); | |
2070 | } | |
aeabfa07 | 2071 | |
b94f2eda JH |
2072 | /* |
2073 | * Warn if it was necessary to reduce the number | |
2074 | * of context lines. | |
2075 | */ | |
2076 | if ((leading != frag->leading) || | |
2077 | (trailing != frag->trailing)) | |
2078 | fprintf(stderr, "Context reduced to (%ld/%ld)" | |
2079 | " to apply fragment at %d\n", | |
2080 | leading, trailing, applied_pos+1); | |
2081 | update_image(img, applied_pos, &preimage, &postimage); | |
2082 | } else { | |
2083 | if (apply_verbosely) | |
61e08cca JH |
2084 | error("while searching for:\n%.*s", |
2085 | (int)(old - oldlines), oldlines); | |
b94f2eda | 2086 | } |
aeabfa07 | 2087 | |
61e08cca JH |
2088 | free(oldlines); |
2089 | free(newlines); | |
b94f2eda JH |
2090 | free(preimage.line_allocated); |
2091 | free(postimage.line_allocated); | |
2092 | ||
2093 | return (applied_pos < 0); | |
3cca928d LT |
2094 | } |
2095 | ||
b94f2eda | 2096 | static int apply_binary_fragment(struct image *img, struct patch *patch) |
0660626c | 2097 | { |
0660626c | 2098 | struct fragment *fragment = patch->fragments; |
c7f9cb14 PH |
2099 | unsigned long len; |
2100 | void *dst; | |
0660626c | 2101 | |
3cd4f5e8 JH |
2102 | /* Binary patch is irreversible without the optional second hunk */ |
2103 | if (apply_in_reverse) { | |
2104 | if (!fragment->next) | |
2105 | return error("cannot reverse-apply a binary patch " | |
2106 | "without the reverse hunk to '%s'", | |
2107 | patch->new_name | |
2108 | ? patch->new_name : patch->old_name); | |
03eb8f8a | 2109 | fragment = fragment->next; |
3cd4f5e8 | 2110 | } |
3cd4f5e8 | 2111 | switch (fragment->binary_patch_method) { |
0660626c | 2112 | case BINARY_DELTA_DEFLATED: |
b94f2eda | 2113 | dst = patch_delta(img->buf, img->len, fragment->patch, |
c7f9cb14 PH |
2114 | fragment->size, &len); |
2115 | if (!dst) | |
2116 | return -1; | |
b94f2eda JH |
2117 | clear_image(img); |
2118 | img->buf = dst; | |
2119 | img->len = len; | |
c7f9cb14 | 2120 | return 0; |
0660626c | 2121 | case BINARY_LITERAL_DEFLATED: |
b94f2eda JH |
2122 | clear_image(img); |
2123 | img->len = fragment->size; | |
2124 | img->buf = xmalloc(img->len+1); | |
2125 | memcpy(img->buf, fragment->patch, img->len); | |
2126 | img->buf[img->len] = '\0'; | |
c7f9cb14 | 2127 | return 0; |
0660626c | 2128 | } |
c7f9cb14 | 2129 | return -1; |
0660626c JH |
2130 | } |
2131 | ||
b94f2eda | 2132 | static int apply_binary(struct image *img, struct patch *patch) |
3cca928d | 2133 | { |
011f4274 | 2134 | const char *name = patch->old_name ? patch->old_name : patch->new_name; |
051308f6 | 2135 | unsigned char sha1[20]; |
011f4274 | 2136 | |
81bf96bb JH |
2137 | /* |
2138 | * For safety, we require patch index line to contain | |
051308f6 JH |
2139 | * full 40-byte textual SHA1 for old and new, at least for now. |
2140 | */ | |
2141 | if (strlen(patch->old_sha1_prefix) != 40 || | |
2142 | strlen(patch->new_sha1_prefix) != 40 || | |
2143 | get_sha1_hex(patch->old_sha1_prefix, sha1) || | |
2144 | get_sha1_hex(patch->new_sha1_prefix, sha1)) | |
2145 | return error("cannot apply binary patch to '%s' " | |
2146 | "without full index line", name); | |
011f4274 | 2147 | |
051308f6 | 2148 | if (patch->old_name) { |
81bf96bb JH |
2149 | /* |
2150 | * See if the old one matches what the patch | |
051308f6 | 2151 | * applies to. |
011f4274 | 2152 | */ |
b94f2eda | 2153 | hash_sha1_file(img->buf, img->len, blob_type, sha1); |
051308f6 JH |
2154 | if (strcmp(sha1_to_hex(sha1), patch->old_sha1_prefix)) |
2155 | return error("the patch applies to '%s' (%s), " | |
2156 | "which does not match the " | |
2157 | "current contents.", | |
2158 | name, sha1_to_hex(sha1)); | |
2159 | } | |
2160 | else { | |
2161 | /* Otherwise, the old one must be empty. */ | |
b94f2eda | 2162 | if (img->len) |
051308f6 JH |
2163 | return error("the patch applies to an empty " |
2164 | "'%s' but it is not empty", name); | |
2165 | } | |
011f4274 | 2166 | |
0660626c | 2167 | get_sha1_hex(patch->new_sha1_prefix, sha1); |
0bef57ee | 2168 | if (is_null_sha1(sha1)) { |
b94f2eda | 2169 | clear_image(img); |
051308f6 | 2170 | return 0; /* deletion patch */ |
0660626c | 2171 | } |
011f4274 | 2172 | |
051308f6 | 2173 | if (has_sha1_file(sha1)) { |
0660626c | 2174 | /* We already have the postimage */ |
21666f1a | 2175 | enum object_type type; |
051308f6 | 2176 | unsigned long size; |
c7f9cb14 | 2177 | char *result; |
051308f6 | 2178 | |
c7f9cb14 PH |
2179 | result = read_sha1_file(sha1, &type, &size); |
2180 | if (!result) | |
051308f6 JH |
2181 | return error("the necessary postimage %s for " |
2182 | "'%s' cannot be read", | |
2183 | patch->new_sha1_prefix, name); | |
b94f2eda JH |
2184 | clear_image(img); |
2185 | img->buf = result; | |
2186 | img->len = size; | |
c7f9cb14 | 2187 | } else { |
81bf96bb JH |
2188 | /* |
2189 | * We have verified buf matches the preimage; | |
0660626c JH |
2190 | * apply the patch data to it, which is stored |
2191 | * in the patch->fragments->{patch,size}. | |
011f4274 | 2192 | */ |
b94f2eda | 2193 | if (apply_binary_fragment(img, patch)) |
051308f6 JH |
2194 | return error("binary patch does not apply to '%s'", |
2195 | name); | |
011f4274 | 2196 | |
051308f6 | 2197 | /* verify that the result matches */ |
b94f2eda | 2198 | hash_sha1_file(img->buf, img->len, blob_type, sha1); |
051308f6 | 2199 | if (strcmp(sha1_to_hex(sha1), patch->new_sha1_prefix)) |
c7f9cb14 PH |
2200 | return error("binary patch to '%s' creates incorrect result (expecting %s, got %s)", |
2201 | name, patch->new_sha1_prefix, sha1_to_hex(sha1)); | |
011f4274 | 2202 | } |
3cca928d | 2203 | |
051308f6 JH |
2204 | return 0; |
2205 | } | |
2206 | ||
b94f2eda | 2207 | static int apply_fragments(struct image *img, struct patch *patch) |
051308f6 JH |
2208 | { |
2209 | struct fragment *frag = patch->fragments; | |
2210 | const char *name = patch->old_name ? patch->old_name : patch->new_name; | |
cf1b7869 JH |
2211 | unsigned ws_rule = patch->ws_rule; |
2212 | unsigned inaccurate_eof = patch->inaccurate_eof; | |
051308f6 JH |
2213 | |
2214 | if (patch->is_binary) | |
b94f2eda | 2215 | return apply_binary(img, patch); |
051308f6 | 2216 | |
3cca928d | 2217 | while (frag) { |
b94f2eda | 2218 | if (apply_one_fragment(img, frag, inaccurate_eof, ws_rule)) { |
57dc397c JH |
2219 | error("patch failed: %s:%ld", name, frag->oldpos); |
2220 | if (!apply_with_reject) | |
2221 | return -1; | |
2222 | frag->rejected = 1; | |
2223 | } | |
3cca928d LT |
2224 | frag = frag->next; |
2225 | } | |
30996652 | 2226 | return 0; |
3cca928d LT |
2227 | } |
2228 | ||
c7f9cb14 | 2229 | static int read_file_or_gitlink(struct cache_entry *ce, struct strbuf *buf) |
e06c5a6c SV |
2230 | { |
2231 | if (!ce) | |
2232 | return 0; | |
2233 | ||
7a51ed66 | 2234 | if (S_ISGITLINK(ce->ce_mode)) { |
c7f9cb14 PH |
2235 | strbuf_grow(buf, 100); |
2236 | strbuf_addf(buf, "Subproject commit %s\n", sha1_to_hex(ce->sha1)); | |
e06c5a6c SV |
2237 | } else { |
2238 | enum object_type type; | |
c7f9cb14 PH |
2239 | unsigned long sz; |
2240 | char *result; | |
2241 | ||
2242 | result = read_sha1_file(ce->sha1, &type, &sz); | |
2243 | if (!result) | |
e06c5a6c | 2244 | return -1; |
c7f9cb14 PH |
2245 | /* XXX read_sha1_file NUL-terminates */ |
2246 | strbuf_attach(buf, result, sz, sz + 1); | |
e06c5a6c SV |
2247 | } |
2248 | return 0; | |
2249 | } | |
2250 | ||
7a07841c DZ |
2251 | static struct patch *in_fn_table(const char *name) |
2252 | { | |
c455c87c | 2253 | struct string_list_item *item; |
7a07841c DZ |
2254 | |
2255 | if (name == NULL) | |
2256 | return NULL; | |
2257 | ||
c455c87c | 2258 | item = string_list_lookup(name, &fn_table); |
7a07841c DZ |
2259 | if (item != NULL) |
2260 | return (struct patch *)item->util; | |
2261 | ||
2262 | return NULL; | |
2263 | } | |
2264 | ||
2265 | static void add_to_fn_table(struct patch *patch) | |
2266 | { | |
c455c87c | 2267 | struct string_list_item *item; |
7a07841c DZ |
2268 | |
2269 | /* | |
2270 | * Always add new_name unless patch is a deletion | |
2271 | * This should cover the cases for normal diffs, | |
2272 | * file creations and copies | |
2273 | */ | |
2274 | if (patch->new_name != NULL) { | |
c455c87c | 2275 | item = string_list_insert(patch->new_name, &fn_table); |
7a07841c DZ |
2276 | item->util = patch; |
2277 | } | |
2278 | ||
2279 | /* | |
2280 | * store a failure on rename/deletion cases because | |
2281 | * later chunks shouldn't patch old names | |
2282 | */ | |
2283 | if ((patch->new_name == NULL) || (patch->is_rename)) { | |
c455c87c | 2284 | item = string_list_insert(patch->old_name, &fn_table); |
7a07841c DZ |
2285 | item->util = (struct patch *) -1; |
2286 | } | |
2287 | } | |
2288 | ||
04e4888e | 2289 | static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *ce) |
3cca928d | 2290 | { |
c7f9cb14 | 2291 | struct strbuf buf; |
b94f2eda JH |
2292 | struct image image; |
2293 | size_t len; | |
2294 | char *img; | |
7a07841c | 2295 | struct patch *tpatch; |
3cca928d | 2296 | |
c7f9cb14 | 2297 | strbuf_init(&buf, 0); |
7a07841c | 2298 | |
a9a3e82e JH |
2299 | if (!(patch->is_copy || patch->is_rename) && |
2300 | ((tpatch = in_fn_table(patch->old_name)) != NULL)) { | |
7a07841c DZ |
2301 | if (tpatch == (struct patch *) -1) { |
2302 | return error("patch %s has been renamed/deleted", | |
2303 | patch->old_name); | |
2304 | } | |
2305 | /* We have a patched copy in memory use that */ | |
2306 | strbuf_add(&buf, tpatch->result, tpatch->resultsize); | |
2307 | } else if (cached) { | |
c7f9cb14 | 2308 | if (read_file_or_gitlink(ce, &buf)) |
e06c5a6c | 2309 | return error("read of %s failed", patch->old_name); |
e06c5a6c SV |
2310 | } else if (patch->old_name) { |
2311 | if (S_ISGITLINK(patch->old_mode)) { | |
c7f9cb14 PH |
2312 | if (ce) { |
2313 | read_file_or_gitlink(ce, &buf); | |
2314 | } else { | |
e06c5a6c SV |
2315 | /* |
2316 | * There is no way to apply subproject | |
2317 | * patch without looking at the index. | |
2318 | */ | |
2319 | patch->fragments = NULL; | |
e06c5a6c | 2320 | } |
c7f9cb14 PH |
2321 | } else { |
2322 | if (read_old_data(st, patch->old_name, &buf)) | |
2323 | return error("read of %s failed", patch->old_name); | |
04e4888e JH |
2324 | } |
2325 | } | |
6e7c92a9 | 2326 | |
b94f2eda JH |
2327 | img = strbuf_detach(&buf, &len); |
2328 | prepare_image(&image, img, len, !patch->is_binary); | |
2329 | ||
2330 | if (apply_fragments(&image, patch) < 0) | |
57dc397c | 2331 | return -1; /* note with --reject this succeeds. */ |
b94f2eda JH |
2332 | patch->result = image.buf; |
2333 | patch->resultsize = image.len; | |
7a07841c | 2334 | add_to_fn_table(patch); |
b94f2eda | 2335 | free(image.line_allocated); |
5aa7d94c | 2336 | |
4be60962 | 2337 | if (0 < patch->is_delete && patch->resultsize) |
5aa7d94c LT |
2338 | return error("removal patch leaves file contents"); |
2339 | ||
3cca928d LT |
2340 | return 0; |
2341 | } | |
2342 | ||
64cab591 JH |
2343 | static int check_to_create_blob(const char *new_name, int ok_if_exists) |
2344 | { | |
2345 | struct stat nst; | |
2346 | if (!lstat(new_name, &nst)) { | |
2347 | if (S_ISDIR(nst.st_mode) || ok_if_exists) | |
2348 | return 0; | |
2349 | /* | |
2350 | * A leading component of new_name might be a symlink | |
2351 | * that is going to be removed with this patch, but | |
2352 | * still pointing at somewhere that has the path. | |
2353 | * In such a case, path "new_name" does not exist as | |
2354 | * far as git is concerned. | |
2355 | */ | |
c40641b7 | 2356 | if (has_symlink_leading_path(strlen(new_name), new_name)) |
64cab591 JH |
2357 | return 0; |
2358 | ||
2359 | return error("%s: already exists in working directory", new_name); | |
2360 | } | |
2361 | else if ((errno != ENOENT) && (errno != ENOTDIR)) | |
2362 | return error("%s: %s", new_name, strerror(errno)); | |
2363 | return 0; | |
2364 | } | |
2365 | ||
e06c5a6c SV |
2366 | static int verify_index_match(struct cache_entry *ce, struct stat *st) |
2367 | { | |
7a51ed66 | 2368 | if (S_ISGITLINK(ce->ce_mode)) { |
e06c5a6c SV |
2369 | if (!S_ISDIR(st->st_mode)) |
2370 | return -1; | |
2371 | return 0; | |
2372 | } | |
4bd5b7da | 2373 | return ce_match_stat(ce, st, CE_MATCH_IGNORE_VALID); |
e06c5a6c SV |
2374 | } |
2375 | ||
5c47f4c6 | 2376 | static int check_preimage(struct patch *patch, struct cache_entry **ce, struct stat *st) |
fab2c257 LT |
2377 | { |
2378 | const char *old_name = patch->old_name; | |
a9a3e82e | 2379 | struct patch *tpatch = NULL; |
5c47f4c6 JH |
2380 | int stat_ret = 0; |
2381 | unsigned st_mode = 0; | |
e06c5a6c SV |
2382 | |
2383 | /* | |
2384 | * Make sure that we do not have local modifications from the | |
2385 | * index when we are looking at the index. Also make sure | |
2386 | * we have the preimage file to be patched in the work tree, | |
2387 | * unless --cached, which tells git to apply only in the index. | |
2388 | */ | |
5c47f4c6 JH |
2389 | if (!old_name) |
2390 | return 0; | |
04e4888e | 2391 | |
5c47f4c6 | 2392 | assert(patch->is_new <= 0); |
a9a3e82e JH |
2393 | |
2394 | if (!(patch->is_copy || patch->is_rename) && | |
2395 | (tpatch = in_fn_table(old_name)) != NULL) { | |
7a07841c DZ |
2396 | if (tpatch == (struct patch *) -1) { |
2397 | return error("%s: has been deleted/renamed", old_name); | |
2398 | } | |
2399 | st_mode = tpatch->new_mode; | |
2400 | } else if (!cached) { | |
5c47f4c6 JH |
2401 | stat_ret = lstat(old_name, st); |
2402 | if (stat_ret && errno != ENOENT) | |
2403 | return error("%s: %s", old_name, strerror(errno)); | |
2404 | } | |
a9a3e82e | 2405 | |
7a07841c | 2406 | if (check_index && !tpatch) { |
5c47f4c6 JH |
2407 | int pos = cache_name_pos(old_name, strlen(old_name)); |
2408 | if (pos < 0) { | |
2409 | if (patch->is_new < 0) | |
2410 | goto is_new; | |
2411 | return error("%s: does not exist in index", old_name); | |
2412 | } | |
2413 | *ce = active_cache[pos]; | |
2414 | if (stat_ret < 0) { | |
2415 | struct checkout costate; | |
2416 | /* checkout */ | |
2417 | costate.base_dir = ""; | |
2418 | costate.base_dir_len = 0; | |
2419 | costate.force = 0; | |
2420 | costate.quiet = 0; | |
2421 | costate.not_new = 0; | |
2422 | costate.refresh_cache = 1; | |
2423 | if (checkout_entry(*ce, &costate, NULL) || | |
2424 | lstat(old_name, st)) | |
2425 | return -1; | |
2426 | } | |
2427 | if (!cached && verify_index_match(*ce, st)) | |
2428 | return error("%s: does not match index", old_name); | |
2429 | if (cached) | |
2430 | st_mode = (*ce)->ce_mode; | |
2431 | } else if (stat_ret < 0) { | |
3cca928d | 2432 | if (patch->is_new < 0) |
5c47f4c6 JH |
2433 | goto is_new; |
2434 | return error("%s: %s", old_name, strerror(errno)); | |
fab2c257 | 2435 | } |
a577284a | 2436 | |
5c47f4c6 JH |
2437 | if (!cached) |
2438 | st_mode = ce_mode_from_stat(*ce, st->st_mode); | |
2439 | ||
2440 | if (patch->is_new < 0) | |
2441 | patch->is_new = 0; | |
2442 | if (!patch->old_mode) | |
2443 | patch->old_mode = st_mode; | |
2444 | if ((st_mode ^ patch->old_mode) & S_IFMT) | |
2445 | return error("%s: wrong type", old_name); | |
2446 | if (st_mode != patch->old_mode) | |
2447 | fprintf(stderr, "warning: %s has type %o, expected %o\n", | |
2448 | old_name, st_mode, patch->old_mode); | |
2449 | return 0; | |
2450 | ||
2451 | is_new: | |
2452 | patch->is_new = 1; | |
2453 | patch->is_delete = 0; | |
2454 | patch->old_name = NULL; | |
2455 | return 0; | |
2456 | } | |
2457 | ||
7a07841c | 2458 | static int check_patch(struct patch *patch) |
5c47f4c6 JH |
2459 | { |
2460 | struct stat st; | |
2461 | const char *old_name = patch->old_name; | |
2462 | const char *new_name = patch->new_name; | |
2463 | const char *name = old_name ? old_name : new_name; | |
2464 | struct cache_entry *ce = NULL; | |
2465 | int ok_if_exists; | |
2466 | int status; | |
2467 | ||
2468 | patch->rejected = 1; /* we will drop this after we succeed */ | |
2469 | ||
2470 | status = check_preimage(patch, &ce, &st); | |
2471 | if (status) | |
2472 | return status; | |
2473 | old_name = patch->old_name; | |
2474 | ||
7a07841c | 2475 | if (in_fn_table(new_name) == (struct patch *) -1) |
81bf96bb JH |
2476 | /* |
2477 | * A type-change diff is always split into a patch to | |
7f95aef2 JH |
2478 | * delete old, immediately followed by a patch to |
2479 | * create new (see diff.c::run_diff()); in such a case | |
2480 | * it is Ok that the entry to be deleted by the | |
2481 | * previous patch is still in the working tree and in | |
2482 | * the index. | |
2483 | */ | |
2484 | ok_if_exists = 1; | |
2485 | else | |
2486 | ok_if_exists = 0; | |
2487 | ||
4be60962 JH |
2488 | if (new_name && |
2489 | ((0 < patch->is_new) | (0 < patch->is_rename) | patch->is_copy)) { | |
7f95aef2 JH |
2490 | if (check_index && |
2491 | cache_name_pos(new_name, strlen(new_name)) >= 0 && | |
2492 | !ok_if_exists) | |
a577284a | 2493 | return error("%s: already exists in index", new_name); |
d91d4c2c | 2494 | if (!cached) { |
64cab591 JH |
2495 | int err = check_to_create_blob(new_name, ok_if_exists); |
2496 | if (err) | |
2497 | return err; | |
d91d4c2c | 2498 | } |
35cc4bcd | 2499 | if (!patch->new_mode) { |
4be60962 | 2500 | if (0 < patch->is_new) |
35cc4bcd JS |
2501 | patch->new_mode = S_IFREG | 0644; |
2502 | else | |
2503 | patch->new_mode = patch->old_mode; | |
2504 | } | |
fab2c257 | 2505 | } |
3cca928d LT |
2506 | |
2507 | if (new_name && old_name) { | |
2508 | int same = !strcmp(old_name, new_name); | |
2509 | if (!patch->new_mode) | |
2510 | patch->new_mode = patch->old_mode; | |
2511 | if ((patch->old_mode ^ patch->new_mode) & S_IFMT) | |
2512 | return error("new mode (%o) of %s does not match old mode (%o)%s%s", | |
2513 | patch->new_mode, new_name, patch->old_mode, | |
2514 | same ? "" : " of ", same ? "" : old_name); | |
04e4888e | 2515 | } |
3cca928d | 2516 | |
04e4888e | 2517 | if (apply_data(patch, &st, ce) < 0) |
011f4274 | 2518 | return error("%s: patch does not apply", name); |
57dc397c | 2519 | patch->rejected = 0; |
a577284a | 2520 | return 0; |
fab2c257 LT |
2521 | } |
2522 | ||
a577284a | 2523 | static int check_patch_list(struct patch *patch) |
19c58fb8 | 2524 | { |
60b7f38e | 2525 | int err = 0; |
a577284a | 2526 | |
7a07841c | 2527 | while (patch) { |
a2bf404e JH |
2528 | if (apply_verbosely) |
2529 | say_patch_name(stderr, | |
2530 | "Checking patch ", patch, "...\n"); | |
7a07841c DZ |
2531 | err |= check_patch(patch); |
2532 | patch = patch->next; | |
7f95aef2 | 2533 | } |
60b7f38e | 2534 | return err; |
a577284a LT |
2535 | } |
2536 | ||
ece7b749 JS |
2537 | /* This function tries to read the sha1 from the current index */ |
2538 | static int get_current_sha1(const char *path, unsigned char *sha1) | |
2539 | { | |
2540 | int pos; | |
2541 | ||
2542 | if (read_cache() < 0) | |
2543 | return -1; | |
2544 | pos = cache_name_pos(path, strlen(path)); | |
2545 | if (pos < 0) | |
2546 | return -1; | |
2547 | hashcpy(sha1, active_cache[pos]->sha1); | |
2548 | return 0; | |
2549 | } | |
2550 | ||
7a988699 JS |
2551 | /* Build an index that contains the just the files needed for a 3way merge */ |
2552 | static void build_fake_ancestor(struct patch *list, const char *filename) | |
2cf67f1e JH |
2553 | { |
2554 | struct patch *patch; | |
7a988699 JS |
2555 | struct index_state result = { 0 }; |
2556 | int fd; | |
2cf67f1e JH |
2557 | |
2558 | /* Once we start supporting the reverse patch, it may be | |
2559 | * worth showing the new sha1 prefix, but until then... | |
2560 | */ | |
2561 | for (patch = list; patch; patch = patch->next) { | |
2562 | const unsigned char *sha1_ptr; | |
2563 | unsigned char sha1[20]; | |
7a988699 | 2564 | struct cache_entry *ce; |
2cf67f1e JH |
2565 | const char *name; |
2566 | ||
2567 | name = patch->old_name ? patch->old_name : patch->new_name; | |
4be60962 | 2568 | if (0 < patch->is_new) |
7a988699 | 2569 | continue; |
2cf67f1e | 2570 | else if (get_sha1(patch->old_sha1_prefix, sha1)) |
ece7b749 JS |
2571 | /* git diff has no index line for mode/type changes */ |
2572 | if (!patch->lines_added && !patch->lines_deleted) { | |
2573 | if (get_current_sha1(patch->new_name, sha1) || | |
2574 | get_current_sha1(patch->old_name, sha1)) | |
2575 | die("mode change for %s, which is not " | |
2576 | "in current HEAD", name); | |
2577 | sha1_ptr = sha1; | |
2578 | } else | |
2579 | die("sha1 information is lacking or useless " | |
2580 | "(%s).", name); | |
2cf67f1e JH |
2581 | else |
2582 | sha1_ptr = sha1; | |
22943f1a | 2583 | |
7a988699 JS |
2584 | ce = make_cache_entry(patch->old_mode, sha1_ptr, name, 0, 0); |
2585 | if (add_index_entry(&result, ce, ADD_CACHE_OK_TO_ADD)) | |
2586 | die ("Could not add %s to temporary index", name); | |
2cf67f1e | 2587 | } |
7a988699 JS |
2588 | |
2589 | fd = open(filename, O_WRONLY | O_CREAT, 0666); | |
2590 | if (fd < 0 || write_index(&result, fd) || close(fd)) | |
2591 | die ("Could not write temporary index to %s", filename); | |
2592 | ||
2593 | discard_index(&result); | |
2cf67f1e JH |
2594 | } |
2595 | ||
a577284a LT |
2596 | static void stat_patch_list(struct patch *patch) |
2597 | { | |
2598 | int files, adds, dels; | |
2599 | ||
2600 | for (files = adds = dels = 0 ; patch ; patch = patch->next) { | |
2601 | files++; | |
2602 | adds += patch->lines_added; | |
2603 | dels += patch->lines_deleted; | |
2604 | show_stats(patch); | |
2605 | } | |
2606 | ||
2607 | printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files, adds, dels); | |
3f40315a LT |
2608 | } |
2609 | ||
7d8b7c21 JH |
2610 | static void numstat_patch_list(struct patch *patch) |
2611 | { | |
2612 | for ( ; patch; patch = patch->next) { | |
2613 | const char *name; | |
49e3343c | 2614 | name = patch->new_name ? patch->new_name : patch->old_name; |
ef58d958 JH |
2615 | if (patch->is_binary) |
2616 | printf("-\t-\t"); | |
2617 | else | |
663af342 PH |
2618 | printf("%d\t%d\t", patch->lines_added, patch->lines_deleted); |
2619 | write_name_quoted(name, stdout, line_termination); | |
7d8b7c21 JH |
2620 | } |
2621 | } | |
2622 | ||
96c912a4 JH |
2623 | static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name) |
2624 | { | |
2625 | if (mode) | |
2626 | printf(" %s mode %06o %s\n", newdelete, mode, name); | |
2627 | else | |
2628 | printf(" %s %s\n", newdelete, name); | |
2629 | } | |
2630 | ||
2631 | static void show_mode_change(struct patch *p, int show_name) | |
2632 | { | |
2633 | if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) { | |
2634 | if (show_name) | |
2635 | printf(" mode change %06o => %06o %s\n", | |
2636 | p->old_mode, p->new_mode, p->new_name); | |
2637 | else | |
2638 | printf(" mode change %06o => %06o\n", | |
2639 | p->old_mode, p->new_mode); | |
2640 | } | |
2641 | } | |
2642 | ||
2643 | static void show_rename_copy(struct patch *p) | |
2644 | { | |
2645 | const char *renamecopy = p->is_rename ? "rename" : "copy"; | |
2646 | const char *old, *new; | |
2647 | ||
2648 | /* Find common prefix */ | |
2649 | old = p->old_name; | |
2650 | new = p->new_name; | |
2651 | while (1) { | |
2652 | const char *slash_old, *slash_new; | |
2653 | slash_old = strchr(old, '/'); | |
2654 | slash_new = strchr(new, '/'); | |
2655 | if (!slash_old || | |
2656 | !slash_new || | |
2657 | slash_old - old != slash_new - new || | |
2658 | memcmp(old, new, slash_new - new)) | |
2659 | break; | |
2660 | old = slash_old + 1; | |
2661 | new = slash_new + 1; | |
2662 | } | |
2663 | /* p->old_name thru old is the common prefix, and old and new | |
2664 | * through the end of names are renames | |
2665 | */ | |
2666 | if (old != p->old_name) | |
2667 | printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy, | |
e30e814d | 2668 | (int)(old - p->old_name), p->old_name, |
96c912a4 JH |
2669 | old, new, p->score); |
2670 | else | |
2671 | printf(" %s %s => %s (%d%%)\n", renamecopy, | |
2672 | p->old_name, p->new_name, p->score); | |
2673 | show_mode_change(p, 0); | |
2674 | } | |
2675 | ||
2676 | static void summary_patch_list(struct patch *patch) | |
2677 | { | |
2678 | struct patch *p; | |
2679 | ||
2680 | for (p = patch; p; p = p->next) { | |
2681 | if (p->is_new) | |
2682 | show_file_mode_name("create", p->new_mode, p->new_name); | |
2683 | else if (p->is_delete) | |
2684 | show_file_mode_name("delete", p->old_mode, p->old_name); | |
2685 | else { | |
2686 | if (p->is_rename || p->is_copy) | |
2687 | show_rename_copy(p); | |
2688 | else { | |
2689 | if (p->score) { | |
2690 | printf(" rewrite %s (%d%%)\n", | |
2691 | p->new_name, p->score); | |
2692 | show_mode_change(p, 0); | |
2693 | } | |
2694 | else | |
2695 | show_mode_change(p, 1); | |
2696 | } | |
2697 | } | |
2698 | } | |
2699 | } | |
2700 | ||
3f40315a LT |
2701 | static void patch_stats(struct patch *patch) |
2702 | { | |
2703 | int lines = patch->lines_added + patch->lines_deleted; | |
2704 | ||
2705 | if (lines > max_change) | |
2706 | max_change = lines; | |
2707 | if (patch->old_name) { | |
22943f1a JH |
2708 | int len = quote_c_style(patch->old_name, NULL, NULL, 0); |
2709 | if (!len) | |
2710 | len = strlen(patch->old_name); | |
3f40315a LT |
2711 | if (len > max_len) |
2712 | max_len = len; | |
2713 | } | |
2714 | if (patch->new_name) { | |
22943f1a JH |
2715 | int len = quote_c_style(patch->new_name, NULL, NULL, 0); |
2716 | if (!len) | |
2717 | len = strlen(patch->new_name); | |
3f40315a LT |
2718 | if (len > max_len) |
2719 | max_len = len; | |
2720 | } | |
19c58fb8 LT |
2721 | } |
2722 | ||
aea19457 | 2723 | static void remove_file(struct patch *patch, int rmdir_empty) |
5aa7d94c | 2724 | { |
7da3bf37 | 2725 | if (update_index) { |
5aa7d94c LT |
2726 | if (remove_file_from_cache(patch->old_name) < 0) |
2727 | die("unable to remove %s from index", patch->old_name); | |
2728 | } | |
d234b21c | 2729 | if (!cached) { |
e06c5a6c SV |
2730 | if (S_ISGITLINK(patch->old_mode)) { |
2731 | if (rmdir(patch->old_name)) | |
2732 | warning("unable to remove submodule %s", | |
2733 | patch->old_name); | |
2734 | } else if (!unlink(patch->old_name) && rmdir_empty) { | |
d234b21c AJ |
2735 | char *name = xstrdup(patch->old_name); |
2736 | char *end = strrchr(name, '/'); | |
2737 | while (end) { | |
2738 | *end = 0; | |
2739 | if (rmdir(name)) | |
2740 | break; | |
2741 | end = strrchr(name, '/'); | |
2742 | } | |
2743 | free(name); | |
2744 | } | |
2745 | } | |
5aa7d94c LT |
2746 | } |
2747 | ||
2748 | static void add_index_file(const char *path, unsigned mode, void *buf, unsigned long size) | |
2749 | { | |
2750 | struct stat st; | |
2751 | struct cache_entry *ce; | |
2752 | int namelen = strlen(path); | |
2753 | unsigned ce_size = cache_entry_size(namelen); | |
2754 | ||
7da3bf37 | 2755 | if (!update_index) |
5aa7d94c LT |
2756 | return; |
2757 | ||
90321c10 | 2758 | ce = xcalloc(1, ce_size); |
5aa7d94c LT |
2759 | memcpy(ce->name, path, namelen); |
2760 | ce->ce_mode = create_ce_mode(mode); | |
7a51ed66 | 2761 | ce->ce_flags = namelen; |
e06c5a6c SV |
2762 | if (S_ISGITLINK(mode)) { |
2763 | const char *s = buf; | |
2764 | ||
2765 | if (get_sha1_hex(s + strlen("Subproject commit "), ce->sha1)) | |
2766 | die("corrupt patch for subproject %s", path); | |
2767 | } else { | |
2768 | if (!cached) { | |
2769 | if (lstat(path, &st) < 0) | |
2770 | die("unable to stat newly created file %s", | |
2771 | path); | |
2772 | fill_stat_cache_info(ce, &st); | |
2773 | } | |
2774 | if (write_sha1_file(buf, size, blob_type, ce->sha1) < 0) | |
2775 | die("unable to create backing store for newly created file %s", path); | |
04e4888e | 2776 | } |
5aa7d94c LT |
2777 | if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0) |
2778 | die("unable to add cache entry for %s", path); | |
2779 | } | |
2780 | ||
1b668341 LT |
2781 | static int try_create_file(const char *path, unsigned int mode, const char *buf, unsigned long size) |
2782 | { | |
ac78e548 | 2783 | int fd; |
5ecd293d | 2784 | struct strbuf nbuf; |
1b668341 | 2785 | |
e06c5a6c SV |
2786 | if (S_ISGITLINK(mode)) { |
2787 | struct stat st; | |
2788 | if (!lstat(path, &st) && S_ISDIR(st.st_mode)) | |
2789 | return 0; | |
2790 | return mkdir(path, 0777); | |
2791 | } | |
2792 | ||
78a8d641 | 2793 | if (has_symlinks && S_ISLNK(mode)) |
2c71810b JH |
2794 | /* Although buf:size is counted string, it also is NUL |
2795 | * terminated. | |
2796 | */ | |
1b668341 | 2797 | return symlink(buf, path); |
cc96fd09 JH |
2798 | |
2799 | fd = open(path, O_CREAT | O_EXCL | O_WRONLY, (mode & 0100) ? 0777 : 0666); | |
2800 | if (fd < 0) | |
2801 | return -1; | |
2802 | ||
5ecd293d PH |
2803 | strbuf_init(&nbuf, 0); |
2804 | if (convert_to_working_tree(path, buf, size, &nbuf)) { | |
2805 | size = nbuf.len; | |
2806 | buf = nbuf.buf; | |
1b668341 | 2807 | } |
c7f9cb14 PH |
2808 | write_or_die(fd, buf, size); |
2809 | strbuf_release(&nbuf); | |
ac78e548 | 2810 | |
1b668341 LT |
2811 | if (close(fd) < 0) |
2812 | die("closing file %s: %s", path, strerror(errno)); | |
2813 | return 0; | |
2814 | } | |
2815 | ||
5c8af185 LT |
2816 | /* |
2817 | * We optimistically assume that the directories exist, | |
2818 | * which is true 99% of the time anyway. If they don't, | |
2819 | * we create them and try again. | |
2820 | */ | |
8361e1d4 | 2821 | static void create_one_file(char *path, unsigned mode, const char *buf, unsigned long size) |
5c8af185 | 2822 | { |
04e4888e JH |
2823 | if (cached) |
2824 | return; | |
1b668341 LT |
2825 | if (!try_create_file(path, mode, buf, size)) |
2826 | return; | |
5c8af185 | 2827 | |
1b668341 | 2828 | if (errno == ENOENT) { |
8361e1d4 JR |
2829 | if (safe_create_leading_directories(path)) |
2830 | return; | |
1b668341 LT |
2831 | if (!try_create_file(path, mode, buf, size)) |
2832 | return; | |
5c8af185 | 2833 | } |
5c8af185 | 2834 | |
56ac168f | 2835 | if (errno == EEXIST || errno == EACCES) { |
c28c571c JH |
2836 | /* We may be trying to create a file where a directory |
2837 | * used to be. | |
2838 | */ | |
2839 | struct stat st; | |
0afa7644 | 2840 | if (!lstat(path, &st) && (!S_ISDIR(st.st_mode) || !rmdir(path))) |
c28c571c JH |
2841 | errno = EEXIST; |
2842 | } | |
2843 | ||
1b668341 LT |
2844 | if (errno == EEXIST) { |
2845 | unsigned int nr = getpid(); | |
5c8af185 | 2846 | |
1b668341 LT |
2847 | for (;;) { |
2848 | const char *newpath; | |
2849 | newpath = mkpath("%s~%u", path, nr); | |
2850 | if (!try_create_file(newpath, mode, buf, size)) { | |
2851 | if (!rename(newpath, path)) | |
2852 | return; | |
2853 | unlink(newpath); | |
2854 | break; | |
2855 | } | |
2856 | if (errno != EEXIST) | |
2857 | break; | |
d9e08be9 AR |
2858 | ++nr; |
2859 | } | |
5c8af185 | 2860 | } |
1b668341 | 2861 | die("unable to write file %s mode %o", path, mode); |
5c8af185 LT |
2862 | } |
2863 | ||
5aa7d94c LT |
2864 | static void create_file(struct patch *patch) |
2865 | { | |
8361e1d4 | 2866 | char *path = patch->new_name; |
5aa7d94c LT |
2867 | unsigned mode = patch->new_mode; |
2868 | unsigned long size = patch->resultsize; | |
2869 | char *buf = patch->result; | |
2870 | ||
2871 | if (!mode) | |
2872 | mode = S_IFREG | 0644; | |
03ac6e64 | 2873 | create_one_file(path, mode, buf, size); |
1b668341 | 2874 | add_index_file(path, mode, buf, size); |
5aa7d94c LT |
2875 | } |
2876 | ||
eed46644 JH |
2877 | /* phase zero is to remove, phase one is to create */ |
2878 | static void write_out_one_result(struct patch *patch, int phase) | |
5aa7d94c LT |
2879 | { |
2880 | if (patch->is_delete > 0) { | |
eed46644 | 2881 | if (phase == 0) |
aea19457 | 2882 | remove_file(patch, 1); |
5aa7d94c LT |
2883 | return; |
2884 | } | |
2885 | if (patch->is_new > 0 || patch->is_copy) { | |
eed46644 JH |
2886 | if (phase == 1) |
2887 | create_file(patch); | |
5aa7d94c LT |
2888 | return; |
2889 | } | |
2890 | /* | |
2891 | * Rename or modification boils down to the same | |
2892 | * thing: remove the old, write the new | |
2893 | */ | |
eed46644 | 2894 | if (phase == 0) |
93969438 | 2895 | remove_file(patch, patch->is_rename); |
eed46644 | 2896 | if (phase == 1) |
57dc397c | 2897 | create_file(patch); |
5aa7d94c LT |
2898 | } |
2899 | ||
57dc397c JH |
2900 | static int write_out_one_reject(struct patch *patch) |
2901 | { | |
82e2765f JH |
2902 | FILE *rej; |
2903 | char namebuf[PATH_MAX]; | |
57dc397c | 2904 | struct fragment *frag; |
82e2765f | 2905 | int cnt = 0; |
57dc397c | 2906 | |
82e2765f | 2907 | for (cnt = 0, frag = patch->fragments; frag; frag = frag->next) { |
57dc397c JH |
2908 | if (!frag->rejected) |
2909 | continue; | |
82e2765f JH |
2910 | cnt++; |
2911 | } | |
2912 | ||
a2bf404e JH |
2913 | if (!cnt) { |
2914 | if (apply_verbosely) | |
2915 | say_patch_name(stderr, | |
2916 | "Applied patch ", patch, " cleanly.\n"); | |
82e2765f | 2917 | return 0; |
a2bf404e | 2918 | } |
82e2765f JH |
2919 | |
2920 | /* This should not happen, because a removal patch that leaves | |
2921 | * contents are marked "rejected" at the patch level. | |
2922 | */ | |
2923 | if (!patch->new_name) | |
2924 | die("internal error"); | |
2925 | ||
a2bf404e JH |
2926 | /* Say this even without --verbose */ |
2927 | say_patch_name(stderr, "Applying patch ", patch, " with"); | |
2928 | fprintf(stderr, " %d rejects...\n", cnt); | |
2929 | ||
82e2765f JH |
2930 | cnt = strlen(patch->new_name); |
2931 | if (ARRAY_SIZE(namebuf) <= cnt + 5) { | |
2932 | cnt = ARRAY_SIZE(namebuf) - 5; | |
2933 | fprintf(stderr, | |
2934 | "warning: truncating .rej filename to %.*s.rej", | |
2935 | cnt - 1, patch->new_name); | |
2936 | } | |
2937 | memcpy(namebuf, patch->new_name, cnt); | |
2938 | memcpy(namebuf + cnt, ".rej", 5); | |
2939 | ||
2940 | rej = fopen(namebuf, "w"); | |
2941 | if (!rej) | |
2942 | return error("cannot open %s: %s", namebuf, strerror(errno)); | |
2943 | ||
2944 | /* Normal git tools never deal with .rej, so do not pretend | |
2945 | * this is a git patch by saying --git nor give extended | |
2946 | * headers. While at it, maybe please "kompare" that wants | |
2947 | * the trailing TAB and some garbage at the end of line ;-). | |
2948 | */ | |
2949 | fprintf(rej, "diff a/%s b/%s\t(rejected hunks)\n", | |
2950 | patch->new_name, patch->new_name); | |
0e9ee323 | 2951 | for (cnt = 1, frag = patch->fragments; |
82e2765f JH |
2952 | frag; |
2953 | cnt++, frag = frag->next) { | |
2954 | if (!frag->rejected) { | |
2955 | fprintf(stderr, "Hunk #%d applied cleanly.\n", cnt); | |
2956 | continue; | |
57dc397c | 2957 | } |
82e2765f JH |
2958 | fprintf(stderr, "Rejected hunk #%d.\n", cnt); |
2959 | fprintf(rej, "%.*s", frag->size, frag->patch); | |
57dc397c | 2960 | if (frag->patch[frag->size-1] != '\n') |
82e2765f | 2961 | fputc('\n', rej); |
57dc397c | 2962 | } |
82e2765f JH |
2963 | fclose(rej); |
2964 | return -1; | |
5aa7d94c LT |
2965 | } |
2966 | ||
57dc397c | 2967 | static int write_out_results(struct patch *list, int skipped_patch) |
5aa7d94c | 2968 | { |
eed46644 | 2969 | int phase; |
57dc397c JH |
2970 | int errs = 0; |
2971 | struct patch *l; | |
eed46644 | 2972 | |
d854f783 | 2973 | if (!list && !skipped_patch) |
57dc397c | 2974 | return error("No changes"); |
f7b79707 | 2975 | |
eed46644 | 2976 | for (phase = 0; phase < 2; phase++) { |
57dc397c | 2977 | l = list; |
eed46644 | 2978 | while (l) { |
57dc397c JH |
2979 | if (l->rejected) |
2980 | errs = 1; | |
82e2765f | 2981 | else { |
57dc397c | 2982 | write_out_one_result(l, phase); |
82e2765f | 2983 | if (phase == 1 && write_out_one_reject(l)) |
57dc397c JH |
2984 | errs = 1; |
2985 | } | |
eed46644 JH |
2986 | l = l->next; |
2987 | } | |
5aa7d94c | 2988 | } |
57dc397c | 2989 | return errs; |
5aa7d94c LT |
2990 | } |
2991 | ||
021b6e45 | 2992 | static struct lock_file lock_file; |
5aa7d94c | 2993 | |
d854f783 JH |
2994 | static struct excludes { |
2995 | struct excludes *next; | |
2996 | const char *path; | |
2997 | } *excludes; | |
2998 | ||
2999 | static int use_patch(struct patch *p) | |
3000 | { | |
c7c81b3a | 3001 | const char *pathname = p->new_name ? p->new_name : p->old_name; |
d854f783 JH |
3002 | struct excludes *x = excludes; |
3003 | while (x) { | |
3004 | if (fnmatch(x->path, pathname, 0) == 0) | |
3005 | return 0; | |
3006 | x = x->next; | |
3007 | } | |
edf2e370 JH |
3008 | if (0 < prefix_length) { |
3009 | int pathlen = strlen(pathname); | |
3010 | if (pathlen <= prefix_length || | |
3011 | memcmp(prefix, pathname, prefix_length)) | |
3012 | return 0; | |
3013 | } | |
d854f783 JH |
3014 | return 1; |
3015 | } | |
3016 | ||
eac70c4f | 3017 | static void prefix_one(char **name) |
56185f49 | 3018 | { |
eac70c4f JS |
3019 | char *old_name = *name; |
3020 | if (!old_name) | |
3021 | return; | |
3022 | *name = xstrdup(prefix_filename(prefix, prefix_length, *name)); | |
3023 | free(old_name); | |
56185f49 JH |
3024 | } |
3025 | ||
3026 | static void prefix_patches(struct patch *p) | |
3027 | { | |
9987d7c5 | 3028 | if (!prefix || p->is_toplevel_relative) |
56185f49 JH |
3029 | return; |
3030 | for ( ; p; p = p->next) { | |
6c912f5b JH |
3031 | if (p->new_name == p->old_name) { |
3032 | char *prefixed = p->new_name; | |
3033 | prefix_one(&prefixed); | |
3034 | p->new_name = p->old_name = prefixed; | |
3035 | } | |
3036 | else { | |
eac70c4f | 3037 | prefix_one(&p->new_name); |
6c912f5b JH |
3038 | prefix_one(&p->old_name); |
3039 | } | |
56185f49 JH |
3040 | } |
3041 | } | |
3042 | ||
c14b9d1e JS |
3043 | #define INACCURATE_EOF (1<<0) |
3044 | #define RECOUNT (1<<1) | |
3045 | ||
3046 | static int apply_patch(int fd, const char *filename, int options) | |
c1bb9350 | 3047 | { |
9a76adeb PH |
3048 | size_t offset; |
3049 | struct strbuf buf; | |
19c58fb8 | 3050 | struct patch *list = NULL, **listp = &list; |
d854f783 | 3051 | int skipped_patch = 0; |
c1bb9350 | 3052 | |
7a07841c | 3053 | /* FIXME - memory leak when using multiple patch files as inputs */ |
c455c87c | 3054 | memset(&fn_table, 0, sizeof(struct string_list)); |
9a76adeb | 3055 | strbuf_init(&buf, 0); |
b5767dd6 | 3056 | patch_input_file = filename; |
9a76adeb | 3057 | read_patch_file(&buf, fd); |
c1bb9350 | 3058 | offset = 0; |
9a76adeb | 3059 | while (offset < buf.len) { |
19c58fb8 LT |
3060 | struct patch *patch; |
3061 | int nr; | |
3062 | ||
90321c10 | 3063 | patch = xcalloc(1, sizeof(*patch)); |
c14b9d1e JS |
3064 | patch->inaccurate_eof = !!(options & INACCURATE_EOF); |
3065 | patch->recount = !!(options & RECOUNT); | |
f94bf440 | 3066 | nr = parse_chunk(buf.buf + offset, buf.len - offset, patch); |
c1bb9350 LT |
3067 | if (nr < 0) |
3068 | break; | |
f686d030 | 3069 | if (apply_in_reverse) |
e5a94313 | 3070 | reverse_patches(patch); |
56185f49 JH |
3071 | if (prefix) |
3072 | prefix_patches(patch); | |
d854f783 JH |
3073 | if (use_patch(patch)) { |
3074 | patch_stats(patch); | |
3075 | *listp = patch; | |
3076 | listp = &patch->next; | |
56185f49 JH |
3077 | } |
3078 | else { | |
d854f783 JH |
3079 | /* perhaps free it a bit better? */ |
3080 | free(patch); | |
3081 | skipped_patch++; | |
3082 | } | |
c1bb9350 | 3083 | offset += nr; |
c1bb9350 | 3084 | } |
19c58fb8 | 3085 | |
81bf96bb | 3086 | if (whitespace_error && (ws_error_action == die_on_ws_error)) |
b5767dd6 JH |
3087 | apply = 0; |
3088 | ||
7da3bf37 JH |
3089 | update_index = check_index && apply; |
3090 | if (update_index && newfd < 0) | |
30ca07a2 JH |
3091 | newfd = hold_locked_index(&lock_file, 1); |
3092 | ||
5aa7d94c LT |
3093 | if (check_index) { |
3094 | if (read_cache() < 0) | |
3095 | die("unable to read index file"); | |
3096 | } | |
3097 | ||
57dc397c JH |
3098 | if ((check || apply) && |
3099 | check_patch_list(list) < 0 && | |
3100 | !apply_with_reject) | |
a577284a LT |
3101 | exit(1); |
3102 | ||
57dc397c JH |
3103 | if (apply && write_out_results(list, skipped_patch)) |
3104 | exit(1); | |
5aa7d94c | 3105 | |
7a988699 JS |
3106 | if (fake_ancestor) |
3107 | build_fake_ancestor(list, fake_ancestor); | |
2cf67f1e | 3108 | |
a577284a LT |
3109 | if (diffstat) |
3110 | stat_patch_list(list); | |
19c58fb8 | 3111 | |
7d8b7c21 JH |
3112 | if (numstat) |
3113 | numstat_patch_list(list); | |
3114 | ||
96c912a4 JH |
3115 | if (summary) |
3116 | summary_patch_list(list); | |
3117 | ||
9a76adeb | 3118 | strbuf_release(&buf); |
c1bb9350 LT |
3119 | return 0; |
3120 | } | |
3121 | ||
ef90d6d4 | 3122 | static int git_apply_config(const char *var, const char *value, void *cb) |
2ae1c53b | 3123 | { |
8e4c6aa1 SB |
3124 | if (!strcmp(var, "apply.whitespace")) |
3125 | return git_config_string(&apply_default_whitespace, var, value); | |
ef90d6d4 | 3126 | return git_default_config(var, value, cb); |
2ae1c53b JH |
3127 | } |
3128 | ||
3129 | ||
cd554bb1 | 3130 | int cmd_apply(int argc, const char **argv, const char *unused_prefix) |
c1bb9350 LT |
3131 | { |
3132 | int i; | |
4dfdbe10 | 3133 | int read_stdin = 1; |
c14b9d1e | 3134 | int options = 0; |
57dc397c | 3135 | int errs = 0; |
af05d679 | 3136 | int is_not_gitdir; |
3eaa38da | 3137 | |
2ae1c53b | 3138 | const char *whitespace_option = NULL; |
c1bb9350 | 3139 | |
dc7b2436 JH |
3140 | prefix = setup_git_directory_gently(&is_not_gitdir); |
3141 | prefix_length = prefix ? strlen(prefix) : 0; | |
ef90d6d4 | 3142 | git_config(git_apply_config, NULL); |
700ea479 JH |
3143 | if (apply_default_whitespace) |
3144 | parse_whitespace_option(apply_default_whitespace); | |
67160271 | 3145 | |
c1bb9350 LT |
3146 | for (i = 1; i < argc; i++) { |
3147 | const char *arg = argv[i]; | |
47495887 | 3148 | char *end; |
c1bb9350 LT |
3149 | int fd; |
3150 | ||
3151 | if (!strcmp(arg, "-")) { | |
c14b9d1e | 3152 | errs |= apply_patch(0, "<stdin>", options); |
4dfdbe10 | 3153 | read_stdin = 0; |
c1bb9350 LT |
3154 | continue; |
3155 | } | |
cc44c765 | 3156 | if (!prefixcmp(arg, "--exclude=")) { |
d854f783 JH |
3157 | struct excludes *x = xmalloc(sizeof(*x)); |
3158 | x->path = arg + 10; | |
3159 | x->next = excludes; | |
3160 | excludes = x; | |
3161 | continue; | |
3162 | } | |
cc44c765 | 3163 | if (!prefixcmp(arg, "-p")) { |
e36f8b60 | 3164 | p_value = atoi(arg + 2); |
3e8a5db9 | 3165 | p_value_known = 1; |
e36f8b60 DB |
3166 | continue; |
3167 | } | |
cb93c193 JH |
3168 | if (!strcmp(arg, "--no-add")) { |
3169 | no_add = 1; | |
3170 | continue; | |
3171 | } | |
fab2c257 | 3172 | if (!strcmp(arg, "--stat")) { |
a577284a | 3173 | apply = 0; |
fab2c257 LT |
3174 | diffstat = 1; |
3175 | continue; | |
3176 | } | |
0660626c JH |
3177 | if (!strcmp(arg, "--allow-binary-replacement") || |
3178 | !strcmp(arg, "--binary")) { | |
2b6eef94 | 3179 | continue; /* now no-op */ |
011f4274 | 3180 | } |
7d8b7c21 JH |
3181 | if (!strcmp(arg, "--numstat")) { |
3182 | apply = 0; | |
3183 | numstat = 1; | |
3184 | continue; | |
3185 | } | |
96c912a4 JH |
3186 | if (!strcmp(arg, "--summary")) { |
3187 | apply = 0; | |
3188 | summary = 1; | |
3189 | continue; | |
3190 | } | |
a577284a LT |
3191 | if (!strcmp(arg, "--check")) { |
3192 | apply = 0; | |
3193 | check = 1; | |
3194 | continue; | |
3195 | } | |
3cca928d | 3196 | if (!strcmp(arg, "--index")) { |
dc7b2436 JH |
3197 | if (is_not_gitdir) |
3198 | die("--index outside a repository"); | |
3cca928d LT |
3199 | check_index = 1; |
3200 | continue; | |
3201 | } | |
04e4888e | 3202 | if (!strcmp(arg, "--cached")) { |
dc7b2436 JH |
3203 | if (is_not_gitdir) |
3204 | die("--cached outside a repository"); | |
04e4888e JH |
3205 | check_index = 1; |
3206 | cached = 1; | |
3207 | continue; | |
3208 | } | |
aefa4a5b LT |
3209 | if (!strcmp(arg, "--apply")) { |
3210 | apply = 1; | |
3211 | continue; | |
3212 | } | |
7a988699 | 3213 | if (!strcmp(arg, "--build-fake-ancestor")) { |
2cf67f1e | 3214 | apply = 0; |
7a988699 JS |
3215 | if (++i >= argc) |
3216 | die ("need a filename"); | |
3217 | fake_ancestor = argv[i]; | |
2cf67f1e JH |
3218 | continue; |
3219 | } | |
22943f1a JH |
3220 | if (!strcmp(arg, "-z")) { |
3221 | line_termination = 0; | |
3222 | continue; | |
3223 | } | |
cc44c765 | 3224 | if (!prefixcmp(arg, "-C")) { |
47495887 EB |
3225 | p_context = strtoul(arg + 2, &end, 0); |
3226 | if (*end != '\0') | |
3227 | die("unrecognized context count '%s'", arg + 2); | |
3228 | continue; | |
3229 | } | |
cc44c765 | 3230 | if (!prefixcmp(arg, "--whitespace=")) { |
2ae1c53b JH |
3231 | whitespace_option = arg + 13; |
3232 | parse_whitespace_option(arg + 13); | |
3233 | continue; | |
19bfcd5a | 3234 | } |
e5a94313 | 3235 | if (!strcmp(arg, "-R") || !strcmp(arg, "--reverse")) { |
f686d030 | 3236 | apply_in_reverse = 1; |
e5a94313 | 3237 | continue; |
4be60962 JH |
3238 | } |
3239 | if (!strcmp(arg, "--unidiff-zero")) { | |
3240 | unidiff_zero = 1; | |
3241 | continue; | |
e5a94313 | 3242 | } |
57dc397c | 3243 | if (!strcmp(arg, "--reject")) { |
8938045a | 3244 | apply = apply_with_reject = apply_verbosely = 1; |
57dc397c JH |
3245 | continue; |
3246 | } | |
aeabfa07 | 3247 | if (!strcmp(arg, "-v") || !strcmp(arg, "--verbose")) { |
a2bf404e JH |
3248 | apply_verbosely = 1; |
3249 | continue; | |
3250 | } | |
3eaa38da | 3251 | if (!strcmp(arg, "--inaccurate-eof")) { |
c14b9d1e JS |
3252 | options |= INACCURATE_EOF; |
3253 | continue; | |
3254 | } | |
3255 | if (!strcmp(arg, "--recount")) { | |
3256 | options |= RECOUNT; | |
3eaa38da JS |
3257 | continue; |
3258 | } | |
f5563887 JH |
3259 | if (!prefixcmp(arg, "--directory=")) { |
3260 | arg += strlen("--directory="); | |
c4730f35 | 3261 | root_len = strlen(arg); |
8ee4a6c2 | 3262 | if (root_len && arg[root_len - 1] != '/') { |
c4730f35 JS |
3263 | char *new_root; |
3264 | root = new_root = xmalloc(root_len + 2); | |
3265 | strcpy(new_root, arg); | |
3266 | strcpy(new_root + root_len++, "/"); | |
3267 | } else | |
3268 | root = arg; | |
3269 | continue; | |
3270 | } | |
edf2e370 JH |
3271 | if (0 < prefix_length) |
3272 | arg = prefix_filename(prefix, prefix_length, arg); | |
3273 | ||
c1bb9350 LT |
3274 | fd = open(arg, O_RDONLY); |
3275 | if (fd < 0) | |
1da16439 | 3276 | die("can't open patch '%s': %s", arg, strerror(errno)); |
4dfdbe10 | 3277 | read_stdin = 0; |
f21d6726 | 3278 | set_default_whitespace_mode(whitespace_option); |
c14b9d1e | 3279 | errs |= apply_patch(fd, arg, options); |
c1bb9350 LT |
3280 | close(fd); |
3281 | } | |
f21d6726 | 3282 | set_default_whitespace_mode(whitespace_option); |
4dfdbe10 | 3283 | if (read_stdin) |
c14b9d1e | 3284 | errs |= apply_patch(0, "<stdin>", options); |
fc96b7c9 JH |
3285 | if (whitespace_error) { |
3286 | if (squelch_whitespace_errors && | |
3287 | squelch_whitespace_errors < whitespace_error) { | |
3288 | int squelched = | |
3289 | whitespace_error - squelch_whitespace_errors; | |
57dc397c JH |
3290 | fprintf(stderr, "warning: squelched %d " |
3291 | "whitespace error%s\n", | |
fc96b7c9 JH |
3292 | squelched, |
3293 | squelched == 1 ? "" : "s"); | |
3294 | } | |
81bf96bb | 3295 | if (ws_error_action == die_on_ws_error) |
c94bf41c | 3296 | die("%d line%s add%s whitespace errors.", |
fc96b7c9 JH |
3297 | whitespace_error, |
3298 | whitespace_error == 1 ? "" : "s", | |
3299 | whitespace_error == 1 ? "s" : ""); | |
d8c37945 | 3300 | if (applied_after_fixing_ws && apply) |
fc96b7c9 | 3301 | fprintf(stderr, "warning: %d line%s applied after" |
c94bf41c JH |
3302 | " fixing whitespace errors.\n", |
3303 | applied_after_fixing_ws, | |
3304 | applied_after_fixing_ws == 1 ? "" : "s"); | |
fc96b7c9 | 3305 | else if (whitespace_error) |
c94bf41c | 3306 | fprintf(stderr, "warning: %d line%s add%s whitespace errors.\n", |
fc96b7c9 JH |
3307 | whitespace_error, |
3308 | whitespace_error == 1 ? "" : "s", | |
3309 | whitespace_error == 1 ? "s" : ""); | |
3310 | } | |
dbd0f7d3 | 3311 | |
7da3bf37 | 3312 | if (update_index) { |
dbd0f7d3 | 3313 | if (write_cache(newfd, active_cache, active_nr) || |
4ed7cd3a | 3314 | commit_locked_index(&lock_file)) |
021b6e45 | 3315 | die("Unable to write new index file"); |
dbd0f7d3 EW |
3316 | } |
3317 | ||
57dc397c | 3318 | return !!errs; |
c1bb9350 | 3319 | } |