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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" |
175a4948 | 16 | #include "dir.h" |
f26c4940 | 17 | #include "parse-options.h" |
c1bb9350 | 18 | |
a9486b02 PR |
19 | /* |
20 | * --check turns on checking that the working tree matches the | |
21 | * files that are being modified, but doesn't apply the patch | |
22 | * --stat does just a diffstat, and doesn't actually apply | |
23 | * --numstat does numeric diffstat, and doesn't actually apply | |
24 | * --index-info shows the old and new index info for paths if available. | |
25 | * --index updates the cache as well. | |
26 | * --cached updates only the cache without ever touching the working tree. | |
27 | */ | |
edf2e370 JH |
28 | static const char *prefix; |
29 | static int prefix_length = -1; | |
dbd0f7d3 | 30 | static int newfd = -1; |
edf2e370 | 31 | |
4be60962 | 32 | static int unidiff_zero; |
e36f8b60 | 33 | static int p_value = 1; |
3e8a5db9 | 34 | static int p_value_known; |
96f1e58f | 35 | static int check_index; |
7da3bf37 | 36 | static int update_index; |
96f1e58f DR |
37 | static int cached; |
38 | static int diffstat; | |
39 | static int numstat; | |
40 | static int summary; | |
41 | static int check; | |
a577284a | 42 | static int apply = 1; |
96f1e58f | 43 | static int apply_in_reverse; |
57dc397c | 44 | static int apply_with_reject; |
a2bf404e | 45 | static int apply_verbosely; |
933e44d3 | 46 | static int allow_overlap; |
96f1e58f | 47 | static int no_add; |
7a988699 | 48 | static const char *fake_ancestor; |
22943f1a | 49 | static int line_termination = '\n'; |
f26c4940 MV |
50 | static unsigned int p_context = UINT_MAX; |
51 | static const char * const apply_usage[] = { | |
52 | "git apply [options] [<patch>...]", | |
53 | NULL | |
54 | }; | |
c1bb9350 | 55 | |
81bf96bb JH |
56 | static enum ws_error_action { |
57 | nowarn_ws_error, | |
58 | warn_on_ws_error, | |
59 | die_on_ws_error, | |
4b05548f | 60 | correct_ws_error |
81bf96bb | 61 | } ws_error_action = warn_on_ws_error; |
96f1e58f | 62 | static int whitespace_error; |
fc96b7c9 | 63 | static int squelch_whitespace_errors = 5; |
c94bf41c | 64 | static int applied_after_fixing_ws; |
86c91f91 GB |
65 | |
66 | static enum ws_ignore { | |
67 | ignore_ws_none, | |
4b05548f | 68 | ignore_ws_change |
86c91f91 GB |
69 | } ws_ignore_action = ignore_ws_none; |
70 | ||
71 | ||
96f1e58f | 72 | static const char *patch_input_file; |
c4730f35 JS |
73 | static const char *root; |
74 | static int root_len; | |
f26c4940 MV |
75 | static int read_stdin = 1; |
76 | static int options; | |
19bfcd5a | 77 | |
2ae1c53b JH |
78 | static void parse_whitespace_option(const char *option) |
79 | { | |
80 | if (!option) { | |
81bf96bb | 81 | ws_error_action = warn_on_ws_error; |
2ae1c53b JH |
82 | return; |
83 | } | |
84 | if (!strcmp(option, "warn")) { | |
81bf96bb | 85 | ws_error_action = warn_on_ws_error; |
2ae1c53b JH |
86 | return; |
87 | } | |
621603b7 | 88 | if (!strcmp(option, "nowarn")) { |
81bf96bb | 89 | ws_error_action = nowarn_ws_error; |
621603b7 JH |
90 | return; |
91 | } | |
2ae1c53b | 92 | if (!strcmp(option, "error")) { |
81bf96bb | 93 | ws_error_action = die_on_ws_error; |
2ae1c53b JH |
94 | return; |
95 | } | |
96 | if (!strcmp(option, "error-all")) { | |
81bf96bb | 97 | ws_error_action = die_on_ws_error; |
2ae1c53b JH |
98 | squelch_whitespace_errors = 0; |
99 | return; | |
100 | } | |
81bf96bb JH |
101 | if (!strcmp(option, "strip") || !strcmp(option, "fix")) { |
102 | ws_error_action = correct_ws_error; | |
2ae1c53b JH |
103 | return; |
104 | } | |
105 | die("unrecognized whitespace option '%s'", option); | |
106 | } | |
107 | ||
86c91f91 GB |
108 | static void parse_ignorewhitespace_option(const char *option) |
109 | { | |
110 | if (!option || !strcmp(option, "no") || | |
111 | !strcmp(option, "false") || !strcmp(option, "never") || | |
112 | !strcmp(option, "none")) { | |
113 | ws_ignore_action = ignore_ws_none; | |
114 | return; | |
115 | } | |
116 | if (!strcmp(option, "change")) { | |
117 | ws_ignore_action = ignore_ws_change; | |
118 | return; | |
119 | } | |
120 | die("unrecognized whitespace ignore option '%s'", option); | |
121 | } | |
122 | ||
f21d6726 JH |
123 | static void set_default_whitespace_mode(const char *whitespace_option) |
124 | { | |
81bf96bb JH |
125 | if (!whitespace_option && !apply_default_whitespace) |
126 | ws_error_action = (apply ? warn_on_ws_error : nowarn_ws_error); | |
f21d6726 JH |
127 | } |
128 | ||
3f40315a LT |
129 | /* |
130 | * For "diff-stat" like behaviour, we keep track of the biggest change | |
131 | * we've seen, and the longest filename. That allows us to do simple | |
132 | * scaling. | |
133 | */ | |
134 | static int max_change, max_len; | |
135 | ||
a4acb0eb LT |
136 | /* |
137 | * Various "current state", notably line numbers and what | |
138 | * file (and how) we're patching right now.. The "is_xxxx" | |
139 | * things are flags, where -1 means "don't know yet". | |
140 | */ | |
46979f56 | 141 | static int linenr = 1; |
19c58fb8 | 142 | |
3cd4f5e8 JH |
143 | /* |
144 | * This represents one "hunk" from a patch, starting with | |
145 | * "@@ -oldpos,oldlines +newpos,newlines @@" marker. The | |
146 | * patch text is pointed at by patch, and its byte length | |
147 | * is stored in size. leading and trailing are the number | |
148 | * of context lines. | |
149 | */ | |
19c58fb8 | 150 | struct fragment { |
47495887 | 151 | unsigned long leading, trailing; |
19c58fb8 LT |
152 | unsigned long oldpos, oldlines; |
153 | unsigned long newpos, newlines; | |
154 | const char *patch; | |
6fe53908 JH |
155 | unsigned free_patch:1, |
156 | rejected:1; | |
19c58fb8 | 157 | int size; |
77b15bbd | 158 | int linenr; |
19c58fb8 LT |
159 | struct fragment *next; |
160 | }; | |
161 | ||
3cd4f5e8 JH |
162 | /* |
163 | * When dealing with a binary patch, we reuse "leading" field | |
164 | * to store the type of the binary hunk, either deflated "delta" | |
165 | * or deflated "literal". | |
166 | */ | |
167 | #define binary_patch_method leading | |
168 | #define BINARY_DELTA_DEFLATED 1 | |
169 | #define BINARY_LITERAL_DEFLATED 2 | |
170 | ||
81bf96bb JH |
171 | /* |
172 | * This represents a "patch" to a file, both metainfo changes | |
173 | * such as creation/deletion, filemode and content changes represented | |
174 | * as a series of fragments. | |
175 | */ | |
19c58fb8 | 176 | struct patch { |
5041aa70 | 177 | char *new_name, *old_name, *def_name; |
19c58fb8 | 178 | unsigned int old_mode, new_mode; |
3dad11bf | 179 | int is_new, is_delete; /* -1 = unknown, 0 = false, 1 = true */ |
57dc397c | 180 | int rejected; |
cf1b7869 | 181 | unsigned ws_rule; |
0660626c | 182 | unsigned long deflate_origlen; |
3f40315a | 183 | int lines_added, lines_deleted; |
96c912a4 | 184 | int score; |
9987d7c5 | 185 | unsigned int is_toplevel_relative:1; |
3dad11bf RS |
186 | unsigned int inaccurate_eof:1; |
187 | unsigned int is_binary:1; | |
188 | unsigned int is_copy:1; | |
189 | unsigned int is_rename:1; | |
c14b9d1e | 190 | unsigned int recount:1; |
19c58fb8 | 191 | struct fragment *fragments; |
5aa7d94c | 192 | char *result; |
c32f749f | 193 | size_t resultsize; |
2cf67f1e JH |
194 | char old_sha1_prefix[41]; |
195 | char new_sha1_prefix[41]; | |
19c58fb8 LT |
196 | struct patch *next; |
197 | }; | |
46979f56 | 198 | |
9d16c2d5 | 199 | static void free_fragment_list(struct fragment *list) |
6fe53908 | 200 | { |
9d16c2d5 JH |
201 | while (list) { |
202 | struct fragment *next = list->next; | |
203 | if (list->free_patch) | |
204 | free((char *)list->patch); | |
205 | free(list); | |
206 | list = next; | |
a604ddef | 207 | } |
9d16c2d5 JH |
208 | } |
209 | ||
210 | static void free_patch(struct patch *patch) | |
211 | { | |
212 | free_fragment_list(patch->fragments); | |
2901bbe5 JH |
213 | free(patch->def_name); |
214 | free(patch->old_name); | |
215 | free(patch->new_name); | |
8192a2fa | 216 | free(patch->result); |
a604ddef JH |
217 | free(patch); |
218 | } | |
219 | ||
220 | static void free_patch_list(struct patch *list) | |
221 | { | |
222 | while (list) { | |
223 | struct patch *next = list->next; | |
224 | free_patch(list); | |
225 | list = next; | |
6fe53908 JH |
226 | } |
227 | } | |
228 | ||
b94f2eda JH |
229 | /* |
230 | * A line in a file, len-bytes long (includes the terminating LF, | |
231 | * except for an incomplete line at the end if the file ends with | |
232 | * one), and its contents hashes to 'hash'. | |
233 | */ | |
234 | struct line { | |
235 | size_t len; | |
236 | unsigned hash : 24; | |
237 | unsigned flag : 8; | |
c330fdd4 | 238 | #define LINE_COMMON 1 |
9d158601 | 239 | #define LINE_PATCHED 2 |
b94f2eda JH |
240 | }; |
241 | ||
242 | /* | |
243 | * This represents a "file", which is an array of "lines". | |
244 | */ | |
245 | struct image { | |
246 | char *buf; | |
247 | size_t len; | |
248 | size_t nr; | |
c330fdd4 | 249 | size_t alloc; |
b94f2eda JH |
250 | struct line *line_allocated; |
251 | struct line *line; | |
252 | }; | |
253 | ||
7a07841c DZ |
254 | /* |
255 | * Records filenames that have been touched, in order to handle | |
256 | * the case where more than one patches touch the same file. | |
257 | */ | |
258 | ||
c455c87c | 259 | static struct string_list fn_table; |
7a07841c | 260 | |
b94f2eda JH |
261 | static uint32_t hash_line(const char *cp, size_t len) |
262 | { | |
263 | size_t i; | |
264 | uint32_t h; | |
265 | for (i = 0, h = 0; i < len; i++) { | |
266 | if (!isspace(cp[i])) { | |
267 | h = h * 3 + (cp[i] & 0xff); | |
268 | } | |
269 | } | |
270 | return h; | |
271 | } | |
272 | ||
86c91f91 GB |
273 | /* |
274 | * Compare lines s1 of length n1 and s2 of length n2, ignoring | |
275 | * whitespace difference. Returns 1 if they match, 0 otherwise | |
276 | */ | |
277 | static int fuzzy_matchlines(const char *s1, size_t n1, | |
278 | const char *s2, size_t n2) | |
279 | { | |
280 | const char *last1 = s1 + n1 - 1; | |
281 | const char *last2 = s2 + n2 - 1; | |
282 | int result = 0; | |
283 | ||
86c91f91 GB |
284 | /* ignore line endings */ |
285 | while ((*last1 == '\r') || (*last1 == '\n')) | |
286 | last1--; | |
287 | while ((*last2 == '\r') || (*last2 == '\n')) | |
288 | last2--; | |
289 | ||
290 | /* skip leading whitespace */ | |
291 | while (isspace(*s1) && (s1 <= last1)) | |
292 | s1++; | |
293 | while (isspace(*s2) && (s2 <= last2)) | |
294 | s2++; | |
295 | /* early return if both lines are empty */ | |
296 | if ((s1 > last1) && (s2 > last2)) | |
297 | return 1; | |
298 | while (!result) { | |
299 | result = *s1++ - *s2++; | |
300 | /* | |
301 | * Skip whitespace inside. We check for whitespace on | |
302 | * both buffers because we don't want "a b" to match | |
303 | * "ab" | |
304 | */ | |
305 | if (isspace(*s1) && isspace(*s2)) { | |
306 | while (isspace(*s1) && s1 <= last1) | |
307 | s1++; | |
308 | while (isspace(*s2) && s2 <= last2) | |
309 | s2++; | |
310 | } | |
311 | /* | |
312 | * If we reached the end on one side only, | |
313 | * lines don't match | |
314 | */ | |
315 | if ( | |
316 | ((s2 > last2) && (s1 <= last1)) || | |
317 | ((s1 > last1) && (s2 <= last2))) | |
318 | return 0; | |
319 | if ((s1 > last1) && (s2 > last2)) | |
320 | break; | |
321 | } | |
322 | ||
323 | return !result; | |
324 | } | |
325 | ||
c330fdd4 JH |
326 | static void add_line_info(struct image *img, const char *bol, size_t len, unsigned flag) |
327 | { | |
328 | ALLOC_GROW(img->line_allocated, img->nr + 1, img->alloc); | |
329 | img->line_allocated[img->nr].len = len; | |
330 | img->line_allocated[img->nr].hash = hash_line(bol, len); | |
331 | img->line_allocated[img->nr].flag = flag; | |
332 | img->nr++; | |
333 | } | |
334 | ||
b94f2eda JH |
335 | static void prepare_image(struct image *image, char *buf, size_t len, |
336 | int prepare_linetable) | |
337 | { | |
338 | const char *cp, *ep; | |
b94f2eda | 339 | |
c330fdd4 | 340 | memset(image, 0, sizeof(*image)); |
b94f2eda JH |
341 | image->buf = buf; |
342 | image->len = len; | |
343 | ||
c330fdd4 | 344 | if (!prepare_linetable) |
b94f2eda | 345 | return; |
b94f2eda JH |
346 | |
347 | ep = image->buf + image->len; | |
b94f2eda | 348 | cp = image->buf; |
b94f2eda JH |
349 | while (cp < ep) { |
350 | const char *next; | |
351 | for (next = cp; next < ep && *next != '\n'; next++) | |
352 | ; | |
353 | if (next < ep) | |
354 | next++; | |
c330fdd4 | 355 | add_line_info(image, cp, next - cp, 0); |
b94f2eda | 356 | cp = next; |
b94f2eda | 357 | } |
c330fdd4 | 358 | image->line = image->line_allocated; |
b94f2eda JH |
359 | } |
360 | ||
361 | static void clear_image(struct image *image) | |
362 | { | |
363 | free(image->buf); | |
364 | image->buf = NULL; | |
365 | image->len = 0; | |
366 | } | |
367 | ||
81bf96bb JH |
368 | static void say_patch_name(FILE *output, const char *pre, |
369 | struct patch *patch, const char *post) | |
a2bf404e JH |
370 | { |
371 | fputs(pre, output); | |
372 | if (patch->old_name && patch->new_name && | |
373 | strcmp(patch->old_name, patch->new_name)) { | |
663af342 | 374 | quote_c_style(patch->old_name, NULL, output, 0); |
a2bf404e | 375 | fputs(" => ", output); |
663af342 PH |
376 | quote_c_style(patch->new_name, NULL, output, 0); |
377 | } else { | |
a2bf404e JH |
378 | const char *n = patch->new_name; |
379 | if (!n) | |
380 | n = patch->old_name; | |
663af342 | 381 | quote_c_style(n, NULL, output, 0); |
a2bf404e JH |
382 | } |
383 | fputs(post, output); | |
384 | } | |
385 | ||
a4acb0eb | 386 | #define SLOP (16) |
c1bb9350 | 387 | |
9a76adeb | 388 | static void read_patch_file(struct strbuf *sb, int fd) |
c1bb9350 | 389 | { |
9a76adeb | 390 | if (strbuf_read(sb, fd, 0) < 0) |
d824cbba | 391 | die_errno("git apply: failed to read"); |
a4acb0eb LT |
392 | |
393 | /* | |
394 | * Make sure that we have some slop in the buffer | |
395 | * so that we can do speculative "memcmp" etc, and | |
396 | * see to it that it is NUL-filled. | |
397 | */ | |
9a76adeb PH |
398 | strbuf_grow(sb, SLOP); |
399 | memset(sb->buf + sb->len, 0, SLOP); | |
c1bb9350 LT |
400 | } |
401 | ||
3cca928d | 402 | static unsigned long linelen(const char *buffer, unsigned long size) |
c1bb9350 LT |
403 | { |
404 | unsigned long len = 0; | |
405 | while (size--) { | |
406 | len++; | |
407 | if (*buffer++ == '\n') | |
408 | break; | |
409 | } | |
410 | return len; | |
411 | } | |
412 | ||
a4acb0eb LT |
413 | static int is_dev_null(const char *str) |
414 | { | |
415 | return !memcmp("/dev/null", str, 9) && isspace(str[9]); | |
416 | } | |
417 | ||
381ca9a3 LT |
418 | #define TERM_SPACE 1 |
419 | #define TERM_TAB 2 | |
9a4a100e LT |
420 | |
421 | static int name_terminate(const char *name, int namelen, int c, int terminate) | |
422 | { | |
423 | if (c == ' ' && !(terminate & TERM_SPACE)) | |
424 | return 0; | |
425 | if (c == '\t' && !(terminate & TERM_TAB)) | |
426 | return 0; | |
427 | ||
9a4a100e LT |
428 | return 1; |
429 | } | |
430 | ||
33eb4dd9 MM |
431 | /* remove double slashes to make --index work with such filenames */ |
432 | static char *squash_slash(char *name) | |
433 | { | |
434 | int i = 0, j = 0; | |
435 | ||
15862087 AG |
436 | if (!name) |
437 | return NULL; | |
438 | ||
33eb4dd9 MM |
439 | while (name[i]) { |
440 | if ((name[j++] = name[i++]) == '/') | |
441 | while (name[i] == '/') | |
442 | i++; | |
443 | } | |
444 | name[j] = '\0'; | |
445 | return name; | |
446 | } | |
447 | ||
2901bbe5 | 448 | static char *find_name_gnu(const char *line, const char *def, int p_value) |
c1bb9350 | 449 | { |
bb7306b5 JN |
450 | struct strbuf name = STRBUF_INIT; |
451 | char *cp; | |
15862087 | 452 | |
bb7306b5 JN |
453 | /* |
454 | * Proposed "new-style" GNU patch/diff format; see | |
455 | * http://marc.theaimsgroup.com/?l=git&m=112927316408690&w=2 | |
456 | */ | |
457 | if (unquote_c_style(&name, line, NULL)) { | |
458 | strbuf_release(&name); | |
459 | return NULL; | |
460 | } | |
7fb1011e | 461 | |
bb7306b5 JN |
462 | for (cp = name.buf; p_value; p_value--) { |
463 | cp = strchr(cp, '/'); | |
464 | if (!cp) { | |
465 | strbuf_release(&name); | |
466 | return NULL; | |
22943f1a | 467 | } |
bb7306b5 JN |
468 | cp++; |
469 | } | |
470 | ||
bb7306b5 | 471 | strbuf_remove(&name, 0, cp - name.buf); |
bb7306b5 JN |
472 | if (root) |
473 | strbuf_insert(&name, 0, root, root_len); | |
474 | return squash_slash(strbuf_detach(&name, NULL)); | |
475 | } | |
476 | ||
2d502e1f | 477 | static size_t sane_tz_len(const char *line, size_t len) |
c1bb9350 | 478 | { |
5a12c886 | 479 | const char *tz, *p; |
15862087 | 480 | |
5a12c886 JN |
481 | if (len < strlen(" +0500") || line[len-strlen(" +0500")] != ' ') |
482 | return 0; | |
483 | tz = line + len - strlen(" +0500"); | |
484 | ||
485 | if (tz[1] != '+' && tz[1] != '-') | |
486 | return 0; | |
487 | ||
488 | for (p = tz + 2; p != line + len; p++) | |
489 | if (!isdigit(*p)) | |
490 | return 0; | |
491 | ||
492 | return line + len - tz; | |
493 | } | |
494 | ||
2d502e1f JN |
495 | static size_t tz_with_colon_len(const char *line, size_t len) |
496 | { | |
497 | const char *tz, *p; | |
498 | ||
499 | if (len < strlen(" +08:00") || line[len - strlen(":00")] != ':') | |
500 | return 0; | |
501 | tz = line + len - strlen(" +08:00"); | |
502 | ||
503 | if (tz[0] != ' ' || (tz[1] != '+' && tz[1] != '-')) | |
504 | return 0; | |
505 | p = tz + 2; | |
506 | if (!isdigit(*p++) || !isdigit(*p++) || *p++ != ':' || | |
507 | !isdigit(*p++) || !isdigit(*p++)) | |
508 | return 0; | |
509 | ||
510 | return line + len - tz; | |
511 | } | |
512 | ||
5a12c886 JN |
513 | static size_t date_len(const char *line, size_t len) |
514 | { | |
515 | const char *date, *p; | |
516 | ||
517 | if (len < strlen("72-02-05") || line[len-strlen("-05")] != '-') | |
518 | return 0; | |
519 | p = date = line + len - strlen("72-02-05"); | |
520 | ||
521 | if (!isdigit(*p++) || !isdigit(*p++) || *p++ != '-' || | |
522 | !isdigit(*p++) || !isdigit(*p++) || *p++ != '-' || | |
523 | !isdigit(*p++) || !isdigit(*p++)) /* Not a date. */ | |
524 | return 0; | |
525 | ||
526 | if (date - line >= strlen("19") && | |
527 | isdigit(date[-1]) && isdigit(date[-2])) /* 4-digit year */ | |
528 | date -= strlen("19"); | |
529 | ||
530 | return line + len - date; | |
531 | } | |
532 | ||
533 | static size_t short_time_len(const char *line, size_t len) | |
534 | { | |
535 | const char *time, *p; | |
536 | ||
537 | if (len < strlen(" 07:01:32") || line[len-strlen(":32")] != ':') | |
538 | return 0; | |
539 | p = time = line + len - strlen(" 07:01:32"); | |
540 | ||
541 | /* Permit 1-digit hours? */ | |
542 | if (*p++ != ' ' || | |
543 | !isdigit(*p++) || !isdigit(*p++) || *p++ != ':' || | |
544 | !isdigit(*p++) || !isdigit(*p++) || *p++ != ':' || | |
545 | !isdigit(*p++) || !isdigit(*p++)) /* Not a time. */ | |
546 | return 0; | |
547 | ||
548 | return line + len - time; | |
549 | } | |
550 | ||
551 | static size_t fractional_time_len(const char *line, size_t len) | |
552 | { | |
553 | const char *p; | |
554 | size_t n; | |
555 | ||
556 | /* Expected format: 19:41:17.620000023 */ | |
557 | if (!len || !isdigit(line[len - 1])) | |
558 | return 0; | |
559 | p = line + len - 1; | |
560 | ||
561 | /* Fractional seconds. */ | |
562 | while (p > line && isdigit(*p)) | |
563 | p--; | |
564 | if (*p != '.') | |
565 | return 0; | |
566 | ||
567 | /* Hours, minutes, and whole seconds. */ | |
568 | n = short_time_len(line, p - line); | |
569 | if (!n) | |
570 | return 0; | |
571 | ||
572 | return line + len - p + n; | |
573 | } | |
574 | ||
575 | static size_t trailing_spaces_len(const char *line, size_t len) | |
576 | { | |
577 | const char *p; | |
578 | ||
579 | /* Expected format: ' ' x (1 or more) */ | |
580 | if (!len || line[len - 1] != ' ') | |
581 | return 0; | |
582 | ||
583 | p = line + len; | |
584 | while (p != line) { | |
585 | p--; | |
586 | if (*p != ' ') | |
587 | return line + len - (p + 1); | |
22943f1a JH |
588 | } |
589 | ||
5a12c886 JN |
590 | /* All spaces! */ |
591 | return len; | |
592 | } | |
593 | ||
594 | static size_t diff_timestamp_len(const char *line, size_t len) | |
595 | { | |
596 | const char *end = line + len; | |
597 | size_t n; | |
598 | ||
599 | /* | |
600 | * Posix: 2010-07-05 19:41:17 | |
601 | * GNU: 2010-07-05 19:41:17.620000023 -0500 | |
602 | */ | |
603 | ||
604 | if (!isdigit(end[-1])) | |
605 | return 0; | |
606 | ||
2d502e1f JN |
607 | n = sane_tz_len(line, end - line); |
608 | if (!n) | |
609 | n = tz_with_colon_len(line, end - line); | |
5a12c886 JN |
610 | end -= n; |
611 | ||
612 | n = short_time_len(line, end - line); | |
613 | if (!n) | |
614 | n = fractional_time_len(line, end - line); | |
615 | end -= n; | |
616 | ||
617 | n = date_len(line, end - line); | |
618 | if (!n) /* No date. Too bad. */ | |
619 | return 0; | |
620 | end -= n; | |
621 | ||
622 | if (end == line) /* No space before date. */ | |
623 | return 0; | |
624 | if (end[-1] == '\t') { /* Success! */ | |
625 | end--; | |
626 | return line + len - end; | |
627 | } | |
628 | if (end[-1] != ' ') /* No space before date. */ | |
629 | return 0; | |
630 | ||
631 | /* Whitespace damage. */ | |
632 | end -= trailing_spaces_len(line, end - line); | |
633 | return line + len - end; | |
634 | } | |
635 | ||
2901bbe5 JH |
636 | static char *null_strdup(const char *s) |
637 | { | |
638 | return s ? xstrdup(s) : NULL; | |
639 | } | |
640 | ||
641 | static char *find_name_common(const char *line, const char *def, | |
642 | int p_value, const char *end, int terminate) | |
5a12c886 JN |
643 | { |
644 | int len; | |
645 | const char *start = NULL; | |
646 | ||
bb7306b5 JN |
647 | if (p_value == 0) |
648 | start = line; | |
5a12c886 | 649 | while (line != end) { |
a4acb0eb | 650 | char c = *line; |
9a4a100e | 651 | |
5a12c886 | 652 | if (!end && isspace(c)) { |
9a4a100e LT |
653 | if (c == '\n') |
654 | break; | |
655 | if (name_terminate(start, line-start, c, terminate)) | |
656 | break; | |
657 | } | |
a4acb0eb LT |
658 | line++; |
659 | if (c == '/' && !--p_value) | |
660 | start = line; | |
661 | } | |
662 | if (!start) | |
2901bbe5 | 663 | return squash_slash(null_strdup(def)); |
a4acb0eb LT |
664 | len = line - start; |
665 | if (!len) | |
2901bbe5 | 666 | return squash_slash(null_strdup(def)); |
a4acb0eb LT |
667 | |
668 | /* | |
669 | * Generally we prefer the shorter name, especially | |
670 | * if the other one is just a variation of that with | |
671 | * something else tacked on to the end (ie "file.orig" | |
672 | * or "file~"). | |
673 | */ | |
674 | if (def) { | |
675 | int deflen = strlen(def); | |
676 | if (deflen < len && !strncmp(start, def, deflen)) | |
2901bbe5 | 677 | return squash_slash(xstrdup(def)); |
c1bb9350 | 678 | } |
a4acb0eb | 679 | |
c4730f35 JS |
680 | if (root) { |
681 | char *ret = xmalloc(root_len + len + 1); | |
682 | strcpy(ret, root); | |
683 | memcpy(ret + root_len, start, len); | |
684 | ret[root_len + len] = '\0'; | |
33eb4dd9 | 685 | return squash_slash(ret); |
c4730f35 JS |
686 | } |
687 | ||
33eb4dd9 | 688 | return squash_slash(xmemdupz(start, len)); |
a4acb0eb LT |
689 | } |
690 | ||
5a12c886 JN |
691 | static char *find_name(const char *line, char *def, int p_value, int terminate) |
692 | { | |
693 | if (*line == '"') { | |
694 | char *name = find_name_gnu(line, def, p_value); | |
695 | if (name) | |
696 | return name; | |
697 | } | |
698 | ||
699 | return find_name_common(line, def, p_value, NULL, terminate); | |
700 | } | |
701 | ||
702 | static char *find_name_traditional(const char *line, char *def, int p_value) | |
703 | { | |
704 | size_t len = strlen(line); | |
705 | size_t date_len; | |
706 | ||
707 | if (*line == '"') { | |
708 | char *name = find_name_gnu(line, def, p_value); | |
709 | if (name) | |
710 | return name; | |
711 | } | |
712 | ||
713 | len = strchrnul(line, '\n') - line; | |
714 | date_len = diff_timestamp_len(line, len); | |
715 | if (!date_len) | |
716 | return find_name_common(line, def, p_value, NULL, TERM_TAB); | |
717 | len -= date_len; | |
718 | ||
719 | return find_name_common(line, def, p_value, line + len, 0); | |
720 | } | |
721 | ||
3e8a5db9 JH |
722 | static int count_slashes(const char *cp) |
723 | { | |
724 | int cnt = 0; | |
725 | char ch; | |
726 | ||
727 | while ((ch = *cp++)) | |
728 | if (ch == '/') | |
729 | cnt++; | |
730 | return cnt; | |
731 | } | |
732 | ||
733 | /* | |
734 | * Given the string after "--- " or "+++ ", guess the appropriate | |
735 | * p_value for the given patch. | |
736 | */ | |
737 | static int guess_p_value(const char *nameline) | |
738 | { | |
739 | char *name, *cp; | |
740 | int val = -1; | |
741 | ||
742 | if (is_dev_null(nameline)) | |
743 | return -1; | |
5a12c886 | 744 | name = find_name_traditional(nameline, NULL, 0); |
3e8a5db9 JH |
745 | if (!name) |
746 | return -1; | |
747 | cp = strchr(name, '/'); | |
748 | if (!cp) | |
749 | val = 0; | |
750 | else if (prefix) { | |
751 | /* | |
752 | * Does it begin with "a/$our-prefix" and such? Then this is | |
753 | * very likely to apply to our directory. | |
754 | */ | |
755 | if (!strncmp(name, prefix, prefix_length)) | |
756 | val = count_slashes(prefix); | |
757 | else { | |
758 | cp++; | |
759 | if (!strncmp(cp, prefix, prefix_length)) | |
760 | val = count_slashes(prefix) + 1; | |
761 | } | |
762 | } | |
763 | free(name); | |
764 | return val; | |
765 | } | |
766 | ||
c4593faf JH |
767 | /* |
768 | * Does the ---/+++ line has the POSIX timestamp after the last HT? | |
769 | * GNU diff puts epoch there to signal a creation/deletion event. Is | |
770 | * this such a timestamp? | |
771 | */ | |
772 | static int has_epoch_timestamp(const char *nameline) | |
773 | { | |
774 | /* | |
775 | * We are only interested in epoch timestamp; any non-zero | |
776 | * fraction cannot be one, hence "(\.0+)?" in the regexp below. | |
777 | * For the same reason, the date must be either 1969-12-31 or | |
778 | * 1970-01-01, and the seconds part must be "00". | |
779 | */ | |
780 | const char stamp_regexp[] = | |
781 | "^(1969-12-31|1970-01-01)" | |
782 | " " | |
783 | "[0-2][0-9]:[0-5][0-9]:00(\\.0+)?" | |
784 | " " | |
a1980c4e AK |
785 | "([-+][0-2][0-9]:?[0-5][0-9])\n"; |
786 | const char *timestamp = NULL, *cp, *colon; | |
c4593faf JH |
787 | static regex_t *stamp; |
788 | regmatch_t m[10]; | |
789 | int zoneoffset; | |
790 | int hourminute; | |
791 | int status; | |
792 | ||
793 | for (cp = nameline; *cp != '\n'; cp++) { | |
794 | if (*cp == '\t') | |
795 | timestamp = cp + 1; | |
796 | } | |
797 | if (!timestamp) | |
798 | return 0; | |
799 | if (!stamp) { | |
800 | stamp = xmalloc(sizeof(*stamp)); | |
801 | if (regcomp(stamp, stamp_regexp, REG_EXTENDED)) { | |
802 | warning("Cannot prepare timestamp regexp %s", | |
803 | stamp_regexp); | |
804 | return 0; | |
805 | } | |
806 | } | |
807 | ||
808 | status = regexec(stamp, timestamp, ARRAY_SIZE(m), m, 0); | |
809 | if (status) { | |
810 | if (status != REG_NOMATCH) | |
811 | warning("regexec returned %d for input: %s", | |
812 | status, timestamp); | |
813 | return 0; | |
814 | } | |
815 | ||
a1980c4e AK |
816 | zoneoffset = strtol(timestamp + m[3].rm_so + 1, (char **) &colon, 10); |
817 | if (*colon == ':') | |
818 | zoneoffset = zoneoffset * 60 + strtol(colon + 1, NULL, 10); | |
819 | else | |
820 | zoneoffset = (zoneoffset / 100) * 60 + (zoneoffset % 100); | |
c4593faf JH |
821 | if (timestamp[m[3].rm_so] == '-') |
822 | zoneoffset = -zoneoffset; | |
823 | ||
824 | /* | |
825 | * YYYY-MM-DD hh:mm:ss must be from either 1969-12-31 | |
826 | * (west of GMT) or 1970-01-01 (east of GMT) | |
827 | */ | |
828 | if ((zoneoffset < 0 && memcmp(timestamp, "1969-12-31", 10)) || | |
829 | (0 <= zoneoffset && memcmp(timestamp, "1970-01-01", 10))) | |
830 | return 0; | |
831 | ||
832 | hourminute = (strtol(timestamp + 11, NULL, 10) * 60 + | |
833 | strtol(timestamp + 14, NULL, 10) - | |
834 | zoneoffset); | |
835 | ||
836 | return ((zoneoffset < 0 && hourminute == 1440) || | |
837 | (0 <= zoneoffset && !hourminute)); | |
838 | } | |
839 | ||
a4acb0eb | 840 | /* |
88f6dbaf | 841 | * Get the name etc info from the ---/+++ lines of a traditional patch header |
a4acb0eb | 842 | * |
9a4a100e LT |
843 | * FIXME! The end-of-filename heuristics are kind of screwy. For existing |
844 | * files, we can happily check the index for a match, but for creating a | |
845 | * new file we should try to match whatever "patch" does. I have no idea. | |
a4acb0eb | 846 | */ |
19c58fb8 | 847 | static void parse_traditional_patch(const char *first, const char *second, struct patch *patch) |
a4acb0eb | 848 | { |
a4acb0eb LT |
849 | char *name; |
850 | ||
a9486b02 PR |
851 | first += 4; /* skip "--- " */ |
852 | second += 4; /* skip "+++ " */ | |
3e8a5db9 JH |
853 | if (!p_value_known) { |
854 | int p, q; | |
855 | p = guess_p_value(first); | |
856 | q = guess_p_value(second); | |
857 | if (p < 0) p = q; | |
858 | if (0 <= p && p == q) { | |
859 | p_value = p; | |
860 | p_value_known = 1; | |
861 | } | |
862 | } | |
a4acb0eb | 863 | if (is_dev_null(first)) { |
19c58fb8 LT |
864 | patch->is_new = 1; |
865 | patch->is_delete = 0; | |
5a12c886 | 866 | name = find_name_traditional(second, NULL, p_value); |
19c58fb8 | 867 | patch->new_name = name; |
a4acb0eb | 868 | } else if (is_dev_null(second)) { |
19c58fb8 LT |
869 | patch->is_new = 0; |
870 | patch->is_delete = 1; | |
5a12c886 | 871 | name = find_name_traditional(first, NULL, p_value); |
19c58fb8 | 872 | patch->old_name = name; |
a4acb0eb | 873 | } else { |
2901bbe5 JH |
874 | char *first_name; |
875 | first_name = find_name_traditional(first, NULL, p_value); | |
876 | name = find_name_traditional(second, first_name, p_value); | |
877 | free(first_name); | |
c4593faf JH |
878 | if (has_epoch_timestamp(first)) { |
879 | patch->is_new = 1; | |
880 | patch->is_delete = 0; | |
881 | patch->new_name = name; | |
882 | } else if (has_epoch_timestamp(second)) { | |
883 | patch->is_new = 0; | |
884 | patch->is_delete = 1; | |
885 | patch->old_name = name; | |
886 | } else { | |
2901bbe5 JH |
887 | patch->old_name = name; |
888 | patch->new_name = xstrdup(name); | |
c4593faf | 889 | } |
a4acb0eb LT |
890 | } |
891 | if (!name) | |
892 | die("unable to find filename in patch at line %d", linenr); | |
a4acb0eb LT |
893 | } |
894 | ||
19c58fb8 | 895 | static int gitdiff_hdrend(const char *line, struct patch *patch) |
a4acb0eb LT |
896 | { |
897 | return -1; | |
898 | } | |
899 | ||
1e3f6b6e LT |
900 | /* |
901 | * We're anal about diff header consistency, to make | |
902 | * sure that we don't end up having strange ambiguous | |
903 | * patches floating around. | |
904 | * | |
905 | * As a result, gitdiff_{old|new}name() will check | |
906 | * their names against any previous information, just | |
907 | * to make sure.. | |
908 | */ | |
909 | static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, const char *oldnew) | |
910 | { | |
1e3f6b6e | 911 | if (!orig_name && !isnull) |
79ee194e | 912 | return find_name(line, NULL, p_value, TERM_TAB); |
1e3f6b6e | 913 | |
1e3f6b6e | 914 | if (orig_name) { |
22943f1a JH |
915 | int len; |
916 | const char *name; | |
917 | char *another; | |
1e3f6b6e LT |
918 | name = orig_name; |
919 | len = strlen(name); | |
920 | if (isnull) | |
7e44c935 | 921 | die("git apply: bad git-diff - expected /dev/null, got %s on line %d", name, linenr); |
79ee194e | 922 | another = find_name(line, NULL, p_value, TERM_TAB); |
da915939 | 923 | if (!another || memcmp(another, name, len + 1)) |
7e44c935 | 924 | die("git apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr); |
22943f1a | 925 | free(another); |
1e3f6b6e LT |
926 | return orig_name; |
927 | } | |
22943f1a JH |
928 | else { |
929 | /* expect "/dev/null" */ | |
930 | if (memcmp("/dev/null", line, 9) || line[9] != '\n') | |
7e44c935 | 931 | die("git apply: bad git-diff - expected /dev/null on line %d", linenr); |
22943f1a JH |
932 | return NULL; |
933 | } | |
1e3f6b6e LT |
934 | } |
935 | ||
19c58fb8 | 936 | static int gitdiff_oldname(const char *line, struct patch *patch) |
a4acb0eb | 937 | { |
2901bbe5 | 938 | char *orig = patch->old_name; |
19c58fb8 | 939 | patch->old_name = gitdiff_verify_name(line, patch->is_new, patch->old_name, "old"); |
2901bbe5 JH |
940 | if (orig != patch->old_name) |
941 | free(orig); | |
a4acb0eb LT |
942 | return 0; |
943 | } | |
944 | ||
19c58fb8 | 945 | static int gitdiff_newname(const char *line, struct patch *patch) |
a4acb0eb | 946 | { |
2901bbe5 | 947 | char *orig = patch->new_name; |
19c58fb8 | 948 | patch->new_name = gitdiff_verify_name(line, patch->is_delete, patch->new_name, "new"); |
2901bbe5 JH |
949 | if (orig != patch->new_name) |
950 | free(orig); | |
a4acb0eb LT |
951 | return 0; |
952 | } | |
953 | ||
19c58fb8 | 954 | static int gitdiff_oldmode(const char *line, struct patch *patch) |
a4acb0eb | 955 | { |
19c58fb8 | 956 | patch->old_mode = strtoul(line, NULL, 8); |
a4acb0eb LT |
957 | return 0; |
958 | } | |
959 | ||
19c58fb8 | 960 | static int gitdiff_newmode(const char *line, struct patch *patch) |
a4acb0eb | 961 | { |
19c58fb8 | 962 | patch->new_mode = strtoul(line, NULL, 8); |
a4acb0eb LT |
963 | return 0; |
964 | } | |
965 | ||
19c58fb8 | 966 | static int gitdiff_delete(const char *line, struct patch *patch) |
a4acb0eb | 967 | { |
19c58fb8 | 968 | patch->is_delete = 1; |
2901bbe5 JH |
969 | free(patch->old_name); |
970 | patch->old_name = null_strdup(patch->def_name); | |
19c58fb8 | 971 | return gitdiff_oldmode(line, patch); |
a4acb0eb LT |
972 | } |
973 | ||
19c58fb8 | 974 | static int gitdiff_newfile(const char *line, struct patch *patch) |
a4acb0eb | 975 | { |
19c58fb8 | 976 | patch->is_new = 1; |
2901bbe5 JH |
977 | free(patch->new_name); |
978 | patch->new_name = null_strdup(patch->def_name); | |
19c58fb8 | 979 | return gitdiff_newmode(line, patch); |
a4acb0eb LT |
980 | } |
981 | ||
19c58fb8 | 982 | static int gitdiff_copysrc(const char *line, struct patch *patch) |
a4acb0eb | 983 | { |
19c58fb8 | 984 | patch->is_copy = 1; |
2901bbe5 | 985 | free(patch->old_name); |
cefd43b7 | 986 | patch->old_name = find_name(line, NULL, p_value ? p_value - 1 : 0, 0); |
a4acb0eb LT |
987 | return 0; |
988 | } | |
989 | ||
19c58fb8 | 990 | static int gitdiff_copydst(const char *line, struct patch *patch) |
a4acb0eb | 991 | { |
19c58fb8 | 992 | patch->is_copy = 1; |
2901bbe5 | 993 | free(patch->new_name); |
cefd43b7 | 994 | patch->new_name = find_name(line, NULL, p_value ? p_value - 1 : 0, 0); |
a4acb0eb LT |
995 | return 0; |
996 | } | |
997 | ||
19c58fb8 | 998 | static int gitdiff_renamesrc(const char *line, struct patch *patch) |
a4acb0eb | 999 | { |
19c58fb8 | 1000 | patch->is_rename = 1; |
2901bbe5 | 1001 | free(patch->old_name); |
cefd43b7 | 1002 | patch->old_name = find_name(line, NULL, p_value ? p_value - 1 : 0, 0); |
a4acb0eb LT |
1003 | return 0; |
1004 | } | |
1005 | ||
19c58fb8 | 1006 | static int gitdiff_renamedst(const char *line, struct patch *patch) |
a4acb0eb | 1007 | { |
19c58fb8 | 1008 | patch->is_rename = 1; |
2901bbe5 | 1009 | free(patch->new_name); |
cefd43b7 | 1010 | patch->new_name = find_name(line, NULL, p_value ? p_value - 1 : 0, 0); |
a4acb0eb LT |
1011 | return 0; |
1012 | } | |
1013 | ||
19c58fb8 | 1014 | static int gitdiff_similarity(const char *line, struct patch *patch) |
a4acb0eb | 1015 | { |
96c912a4 JH |
1016 | if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX) |
1017 | patch->score = 0; | |
a4acb0eb | 1018 | return 0; |
c1bb9350 LT |
1019 | } |
1020 | ||
70aadac0 JH |
1021 | static int gitdiff_dissimilarity(const char *line, struct patch *patch) |
1022 | { | |
96c912a4 JH |
1023 | if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX) |
1024 | patch->score = 0; | |
70aadac0 JH |
1025 | return 0; |
1026 | } | |
1027 | ||
2cf67f1e JH |
1028 | static int gitdiff_index(const char *line, struct patch *patch) |
1029 | { | |
81bf96bb JH |
1030 | /* |
1031 | * index line is N hexadecimal, "..", N hexadecimal, | |
2cf67f1e JH |
1032 | * and optional space with octal mode. |
1033 | */ | |
1034 | const char *ptr, *eol; | |
1035 | int len; | |
1036 | ||
1037 | ptr = strchr(line, '.'); | |
9add69b1 | 1038 | if (!ptr || ptr[1] != '.' || 40 < ptr - line) |
2cf67f1e JH |
1039 | return 0; |
1040 | len = ptr - line; | |
1041 | memcpy(patch->old_sha1_prefix, line, len); | |
1042 | patch->old_sha1_prefix[len] = 0; | |
1043 | ||
1044 | line = ptr + 2; | |
1045 | ptr = strchr(line, ' '); | |
1046 | eol = strchr(line, '\n'); | |
1047 | ||
1048 | if (!ptr || eol < ptr) | |
1049 | ptr = eol; | |
1050 | len = ptr - line; | |
1051 | ||
9add69b1 | 1052 | if (40 < len) |
2cf67f1e JH |
1053 | return 0; |
1054 | memcpy(patch->new_sha1_prefix, line, len); | |
1055 | patch->new_sha1_prefix[len] = 0; | |
1056 | if (*ptr == ' ') | |
1f7903a3 | 1057 | patch->old_mode = strtoul(ptr+1, NULL, 8); |
2cf67f1e JH |
1058 | return 0; |
1059 | } | |
1060 | ||
9a4a100e LT |
1061 | /* |
1062 | * This is normal for a diff that doesn't change anything: we'll fall through | |
1063 | * into the next diff. Tell the parser to break out. | |
1064 | */ | |
19c58fb8 | 1065 | static int gitdiff_unrecognized(const char *line, struct patch *patch) |
9a4a100e LT |
1066 | { |
1067 | return -1; | |
1068 | } | |
1069 | ||
22943f1a JH |
1070 | static const char *stop_at_slash(const char *line, int llen) |
1071 | { | |
ec7fc0b1 | 1072 | int nslash = p_value; |
22943f1a JH |
1073 | int i; |
1074 | ||
1075 | for (i = 0; i < llen; i++) { | |
1076 | int ch = line[i]; | |
ec7fc0b1 JH |
1077 | if (ch == '/' && --nslash <= 0) |
1078 | return &line[i]; | |
22943f1a JH |
1079 | } |
1080 | return NULL; | |
1081 | } | |
1082 | ||
81bf96bb JH |
1083 | /* |
1084 | * This is to extract the same name that appears on "diff --git" | |
22943f1a JH |
1085 | * line. We do not find and return anything if it is a rename |
1086 | * patch, and it is OK because we will find the name elsewhere. | |
1087 | * We need to reliably find name only when it is mode-change only, | |
1088 | * creation or deletion of an empty file. In any of these cases, | |
1089 | * both sides are the same name under a/ and b/ respectively. | |
1090 | */ | |
26693ba8 | 1091 | static char *git_header_name(const char *line, int llen) |
5041aa70 | 1092 | { |
22943f1a JH |
1093 | const char *name; |
1094 | const char *second = NULL; | |
cefd43b7 | 1095 | size_t len, line_len; |
5041aa70 | 1096 | |
22943f1a JH |
1097 | line += strlen("diff --git "); |
1098 | llen -= strlen("diff --git "); | |
1099 | ||
1100 | if (*line == '"') { | |
1101 | const char *cp; | |
f285a2d7 BC |
1102 | struct strbuf first = STRBUF_INIT; |
1103 | struct strbuf sp = STRBUF_INIT; | |
7fb1011e PH |
1104 | |
1105 | if (unquote_c_style(&first, line, &second)) | |
1106 | goto free_and_fail1; | |
22943f1a JH |
1107 | |
1108 | /* advance to the first slash */ | |
7fb1011e PH |
1109 | cp = stop_at_slash(first.buf, first.len); |
1110 | /* we do not accept absolute paths */ | |
1111 | if (!cp || cp == first.buf) | |
1112 | goto free_and_fail1; | |
1113 | strbuf_remove(&first, 0, cp + 1 - first.buf); | |
22943f1a | 1114 | |
81bf96bb JH |
1115 | /* |
1116 | * second points at one past closing dq of name. | |
22943f1a JH |
1117 | * find the second name. |
1118 | */ | |
1119 | while ((second < line + llen) && isspace(*second)) | |
1120 | second++; | |
1121 | ||
1122 | if (line + llen <= second) | |
7fb1011e | 1123 | goto free_and_fail1; |
22943f1a | 1124 | if (*second == '"') { |
7fb1011e PH |
1125 | if (unquote_c_style(&sp, second, NULL)) |
1126 | goto free_and_fail1; | |
1127 | cp = stop_at_slash(sp.buf, sp.len); | |
1128 | if (!cp || cp == sp.buf) | |
1129 | goto free_and_fail1; | |
22943f1a | 1130 | /* They must match, otherwise ignore */ |
7fb1011e PH |
1131 | if (strcmp(cp + 1, first.buf)) |
1132 | goto free_and_fail1; | |
1133 | strbuf_release(&sp); | |
b315c5c0 | 1134 | return strbuf_detach(&first, NULL); |
22943f1a JH |
1135 | } |
1136 | ||
1137 | /* unquoted second */ | |
1138 | cp = stop_at_slash(second, line + llen - second); | |
1139 | if (!cp || cp == second) | |
7fb1011e | 1140 | goto free_and_fail1; |
22943f1a | 1141 | cp++; |
7fb1011e PH |
1142 | if (line + llen - cp != first.len + 1 || |
1143 | memcmp(first.buf, cp, first.len)) | |
1144 | goto free_and_fail1; | |
b315c5c0 | 1145 | return strbuf_detach(&first, NULL); |
7fb1011e PH |
1146 | |
1147 | free_and_fail1: | |
1148 | strbuf_release(&first); | |
1149 | strbuf_release(&sp); | |
1150 | return NULL; | |
5041aa70 LT |
1151 | } |
1152 | ||
22943f1a JH |
1153 | /* unquoted first name */ |
1154 | name = stop_at_slash(line, llen); | |
1155 | if (!name || name == line) | |
5041aa70 | 1156 | return NULL; |
22943f1a JH |
1157 | name++; |
1158 | ||
81bf96bb JH |
1159 | /* |
1160 | * since the first name is unquoted, a dq if exists must be | |
22943f1a JH |
1161 | * the beginning of the second name. |
1162 | */ | |
1163 | for (second = name; second < line + llen; second++) { | |
1164 | if (*second == '"') { | |
f285a2d7 | 1165 | struct strbuf sp = STRBUF_INIT; |
22943f1a | 1166 | const char *np; |
7fb1011e | 1167 | |
7fb1011e PH |
1168 | if (unquote_c_style(&sp, second, NULL)) |
1169 | goto free_and_fail2; | |
1170 | ||
1171 | np = stop_at_slash(sp.buf, sp.len); | |
1172 | if (!np || np == sp.buf) | |
1173 | goto free_and_fail2; | |
22943f1a | 1174 | np++; |
7fb1011e PH |
1175 | |
1176 | len = sp.buf + sp.len - np; | |
1177 | if (len < second - name && | |
22943f1a JH |
1178 | !strncmp(np, name, len) && |
1179 | isspace(name[len])) { | |
1180 | /* Good */ | |
7fb1011e | 1181 | strbuf_remove(&sp, 0, np - sp.buf); |
b315c5c0 | 1182 | return strbuf_detach(&sp, NULL); |
22943f1a | 1183 | } |
7fb1011e PH |
1184 | |
1185 | free_and_fail2: | |
1186 | strbuf_release(&sp); | |
1187 | return NULL; | |
22943f1a JH |
1188 | } |
1189 | } | |
1190 | ||
5041aa70 LT |
1191 | /* |
1192 | * Accept a name only if it shows up twice, exactly the same | |
1193 | * form. | |
1194 | */ | |
cefd43b7 FC |
1195 | second = strchr(name, '\n'); |
1196 | if (!second) | |
1197 | return NULL; | |
1198 | line_len = second - name; | |
5041aa70 | 1199 | for (len = 0 ; ; len++) { |
dd305c84 | 1200 | switch (name[len]) { |
5041aa70 LT |
1201 | default: |
1202 | continue; | |
1203 | case '\n': | |
e70a165d | 1204 | return NULL; |
5041aa70 | 1205 | case '\t': case ' ': |
cefd43b7 FC |
1206 | second = stop_at_slash(name + len, line_len - len); |
1207 | if (!second) | |
1208 | return NULL; | |
1209 | second++; | |
1210 | if (second[len] == '\n' && !strncmp(name, second, len)) { | |
182af834 | 1211 | return xmemdupz(name, len); |
5041aa70 LT |
1212 | } |
1213 | } | |
1214 | } | |
5041aa70 LT |
1215 | } |
1216 | ||
c1bb9350 | 1217 | /* Verify that we recognize the lines following a git header */ |
26693ba8 | 1218 | static int parse_git_header(const char *line, int len, unsigned int size, struct patch *patch) |
c1bb9350 | 1219 | { |
a4acb0eb LT |
1220 | unsigned long offset; |
1221 | ||
1222 | /* A git diff has explicit new/delete information, so we don't guess */ | |
19c58fb8 LT |
1223 | patch->is_new = 0; |
1224 | patch->is_delete = 0; | |
a4acb0eb | 1225 | |
5041aa70 LT |
1226 | /* |
1227 | * Some things may not have the old name in the | |
1228 | * rest of the headers anywhere (pure mode changes, | |
1229 | * or removing or adding empty files), so we get | |
1230 | * the default name from the header. | |
1231 | */ | |
22943f1a | 1232 | patch->def_name = git_header_name(line, len); |
969c8775 JK |
1233 | if (patch->def_name && root) { |
1234 | char *s = xmalloc(root_len + strlen(patch->def_name) + 1); | |
1235 | strcpy(s, root); | |
1236 | strcpy(s + root_len, patch->def_name); | |
1237 | free(patch->def_name); | |
1238 | patch->def_name = s; | |
1239 | } | |
5041aa70 | 1240 | |
a4acb0eb LT |
1241 | line += len; |
1242 | size -= len; | |
1243 | linenr++; | |
1244 | for (offset = len ; size > 0 ; offset += len, size -= len, line += len, linenr++) { | |
1245 | static const struct opentry { | |
1246 | const char *str; | |
19c58fb8 | 1247 | int (*fn)(const char *, struct patch *); |
a4acb0eb LT |
1248 | } optable[] = { |
1249 | { "@@ -", gitdiff_hdrend }, | |
1250 | { "--- ", gitdiff_oldname }, | |
1251 | { "+++ ", gitdiff_newname }, | |
1252 | { "old mode ", gitdiff_oldmode }, | |
1253 | { "new mode ", gitdiff_newmode }, | |
1254 | { "deleted file mode ", gitdiff_delete }, | |
1255 | { "new file mode ", gitdiff_newfile }, | |
1256 | { "copy from ", gitdiff_copysrc }, | |
1257 | { "copy to ", gitdiff_copydst }, | |
33f4d087 LT |
1258 | { "rename old ", gitdiff_renamesrc }, |
1259 | { "rename new ", gitdiff_renamedst }, | |
dc938417 LT |
1260 | { "rename from ", gitdiff_renamesrc }, |
1261 | { "rename to ", gitdiff_renamedst }, | |
a4acb0eb | 1262 | { "similarity index ", gitdiff_similarity }, |
70aadac0 | 1263 | { "dissimilarity index ", gitdiff_dissimilarity }, |
2cf67f1e | 1264 | { "index ", gitdiff_index }, |
9a4a100e | 1265 | { "", gitdiff_unrecognized }, |
a4acb0eb LT |
1266 | }; |
1267 | int i; | |
c1bb9350 | 1268 | |
c1bb9350 | 1269 | len = linelen(line, size); |
a4acb0eb | 1270 | if (!len || line[len-1] != '\n') |
c1bb9350 | 1271 | break; |
b4f2a6ac | 1272 | for (i = 0; i < ARRAY_SIZE(optable); i++) { |
a4acb0eb LT |
1273 | const struct opentry *p = optable + i; |
1274 | int oplen = strlen(p->str); | |
1275 | if (len < oplen || memcmp(p->str, line, oplen)) | |
1276 | continue; | |
19c58fb8 | 1277 | if (p->fn(line + oplen, patch) < 0) |
a4acb0eb | 1278 | return offset; |
9a4a100e | 1279 | break; |
a4acb0eb | 1280 | } |
c1bb9350 LT |
1281 | } |
1282 | ||
a4acb0eb | 1283 | return offset; |
c1bb9350 LT |
1284 | } |
1285 | ||
fab2c257 | 1286 | static int parse_num(const char *line, unsigned long *p) |
46979f56 LT |
1287 | { |
1288 | char *ptr; | |
fab2c257 LT |
1289 | |
1290 | if (!isdigit(*line)) | |
1291 | return 0; | |
1292 | *p = strtoul(line, &ptr, 10); | |
1293 | return ptr - line; | |
1294 | } | |
1295 | ||
1296 | static int parse_range(const char *line, int len, int offset, const char *expect, | |
81bf96bb | 1297 | unsigned long *p1, unsigned long *p2) |
fab2c257 | 1298 | { |
46979f56 LT |
1299 | int digits, ex; |
1300 | ||
1301 | if (offset < 0 || offset >= len) | |
1302 | return -1; | |
1303 | line += offset; | |
1304 | len -= offset; | |
1305 | ||
fab2c257 LT |
1306 | digits = parse_num(line, p1); |
1307 | if (!digits) | |
46979f56 | 1308 | return -1; |
46979f56 LT |
1309 | |
1310 | offset += digits; | |
1311 | line += digits; | |
1312 | len -= digits; | |
1313 | ||
c1504628 | 1314 | *p2 = 1; |
fab2c257 LT |
1315 | if (*line == ',') { |
1316 | digits = parse_num(line+1, p2); | |
1317 | if (!digits) | |
1318 | return -1; | |
1319 | ||
1320 | offset += digits+1; | |
1321 | line += digits+1; | |
1322 | len -= digits+1; | |
1323 | } | |
1324 | ||
46979f56 LT |
1325 | ex = strlen(expect); |
1326 | if (ex > len) | |
1327 | return -1; | |
1328 | if (memcmp(line, expect, ex)) | |
1329 | return -1; | |
1330 | ||
1331 | return offset + ex; | |
1332 | } | |
1333 | ||
26693ba8 | 1334 | static void recount_diff(const char *line, int size, struct fragment *fragment) |
c14b9d1e JS |
1335 | { |
1336 | int oldlines = 0, newlines = 0, ret = 0; | |
1337 | ||
1338 | if (size < 1) { | |
1339 | warning("recount: ignore empty hunk"); | |
1340 | return; | |
1341 | } | |
1342 | ||
1343 | for (;;) { | |
1344 | int len = linelen(line, size); | |
1345 | size -= len; | |
1346 | line += len; | |
1347 | ||
1348 | if (size < 1) | |
1349 | break; | |
1350 | ||
1351 | switch (*line) { | |
1352 | case ' ': case '\n': | |
1353 | newlines++; | |
1354 | /* fall through */ | |
1355 | case '-': | |
1356 | oldlines++; | |
1357 | continue; | |
1358 | case '+': | |
1359 | newlines++; | |
1360 | continue; | |
1361 | case '\\': | |
6cf91492 | 1362 | continue; |
c14b9d1e JS |
1363 | case '@': |
1364 | ret = size < 3 || prefixcmp(line, "@@ "); | |
1365 | break; | |
1366 | case 'd': | |
1367 | ret = size < 5 || prefixcmp(line, "diff "); | |
1368 | break; | |
1369 | default: | |
1370 | ret = -1; | |
1371 | break; | |
1372 | } | |
1373 | if (ret) { | |
1374 | warning("recount: unexpected line: %.*s", | |
1375 | (int)linelen(line, size), line); | |
1376 | return; | |
1377 | } | |
1378 | break; | |
1379 | } | |
1380 | fragment->oldlines = oldlines; | |
1381 | fragment->newlines = newlines; | |
1382 | } | |
1383 | ||
46979f56 LT |
1384 | /* |
1385 | * Parse a unified diff fragment header of the | |
1386 | * form "@@ -a,b +c,d @@" | |
1387 | */ | |
26693ba8 | 1388 | static int parse_fragment_header(const char *line, int len, struct fragment *fragment) |
46979f56 LT |
1389 | { |
1390 | int offset; | |
1391 | ||
1392 | if (!len || line[len-1] != '\n') | |
1393 | return -1; | |
1394 | ||
1395 | /* Figure out the number of lines in a fragment */ | |
fab2c257 LT |
1396 | offset = parse_range(line, len, 4, " +", &fragment->oldpos, &fragment->oldlines); |
1397 | offset = parse_range(line, len, offset, " @@", &fragment->newpos, &fragment->newlines); | |
46979f56 LT |
1398 | |
1399 | return offset; | |
1400 | } | |
1401 | ||
26693ba8 | 1402 | static int find_header(const char *line, unsigned long size, int *hdrsize, struct patch *patch) |
c1bb9350 LT |
1403 | { |
1404 | unsigned long offset, len; | |
1405 | ||
9987d7c5 | 1406 | patch->is_toplevel_relative = 0; |
19c58fb8 LT |
1407 | patch->is_rename = patch->is_copy = 0; |
1408 | patch->is_new = patch->is_delete = -1; | |
1409 | patch->old_mode = patch->new_mode = 0; | |
1410 | patch->old_name = patch->new_name = NULL; | |
46979f56 | 1411 | for (offset = 0; size > 0; offset += len, size -= len, line += len, linenr++) { |
c1bb9350 LT |
1412 | unsigned long nextlen; |
1413 | ||
1414 | len = linelen(line, size); | |
1415 | if (!len) | |
1416 | break; | |
1417 | ||
1418 | /* Testing this early allows us to take a few shortcuts.. */ | |
1419 | if (len < 6) | |
1420 | continue; | |
46979f56 LT |
1421 | |
1422 | /* | |
82e5a82f | 1423 | * Make sure we don't find any unconnected patch fragments. |
46979f56 LT |
1424 | * That's a sign that we didn't find a header, and that a |
1425 | * patch has become corrupted/broken up. | |
1426 | */ | |
1427 | if (!memcmp("@@ -", line, 4)) { | |
19c58fb8 LT |
1428 | struct fragment dummy; |
1429 | if (parse_fragment_header(line, len, &dummy) < 0) | |
46979f56 | 1430 | continue; |
65341411 JH |
1431 | die("patch fragment without header at line %d: %.*s", |
1432 | linenr, (int)len-1, line); | |
46979f56 LT |
1433 | } |
1434 | ||
c1bb9350 LT |
1435 | if (size < len + 6) |
1436 | break; | |
1437 | ||
1438 | /* | |
1439 | * Git patch? It might not have a real patch, just a rename | |
1440 | * or mode change, so we handle that specially | |
1441 | */ | |
1442 | if (!memcmp("diff --git ", line, 11)) { | |
19c58fb8 | 1443 | int git_hdr_len = parse_git_header(line, len, size, patch); |
206de27e | 1444 | if (git_hdr_len <= len) |
c1bb9350 | 1445 | continue; |
b7e8039a LT |
1446 | if (!patch->old_name && !patch->new_name) { |
1447 | if (!patch->def_name) | |
15862087 AG |
1448 | die("git diff header lacks filename information when removing " |
1449 | "%d leading pathname components (line %d)" , p_value, linenr); | |
2901bbe5 JH |
1450 | patch->old_name = xstrdup(patch->def_name); |
1451 | patch->new_name = xstrdup(patch->def_name); | |
b7e8039a | 1452 | } |
2c93286a JM |
1453 | if (!patch->is_delete && !patch->new_name) |
1454 | die("git diff header lacks filename information " | |
1455 | "(line %d)", linenr); | |
9987d7c5 | 1456 | patch->is_toplevel_relative = 1; |
a4acb0eb | 1457 | *hdrsize = git_hdr_len; |
c1bb9350 LT |
1458 | return offset; |
1459 | } | |
1460 | ||
81bf96bb | 1461 | /* --- followed by +++ ? */ |
c1bb9350 LT |
1462 | if (memcmp("--- ", line, 4) || memcmp("+++ ", line + len, 4)) |
1463 | continue; | |
1464 | ||
1465 | /* | |
1466 | * We only accept unified patches, so we want it to | |
1467 | * at least have "@@ -a,b +c,d @@\n", which is 14 chars | |
81bf96bb | 1468 | * minimum ("@@ -0,0 +1 @@\n" is the shortest). |
c1bb9350 LT |
1469 | */ |
1470 | nextlen = linelen(line + len, size - len); | |
1471 | if (size < nextlen + 14 || memcmp("@@ -", line + len + nextlen, 4)) | |
1472 | continue; | |
1473 | ||
1474 | /* Ok, we'll consider it a patch */ | |
19c58fb8 | 1475 | parse_traditional_patch(line, line+len, patch); |
c1bb9350 | 1476 | *hdrsize = len + nextlen; |
46979f56 | 1477 | linenr += 2; |
c1bb9350 LT |
1478 | return offset; |
1479 | } | |
1480 | return -1; | |
1481 | } | |
1482 | ||
92a1747e | 1483 | static void record_ws_error(unsigned result, const char *line, int len, int linenr) |
d0c25035 | 1484 | { |
c1795bb0 | 1485 | char *err; |
92a1747e | 1486 | |
c1795bb0 WC |
1487 | if (!result) |
1488 | return; | |
d0c25035 | 1489 | |
d0c25035 JH |
1490 | whitespace_error++; |
1491 | if (squelch_whitespace_errors && | |
1492 | squelch_whitespace_errors < whitespace_error) | |
92a1747e JH |
1493 | return; |
1494 | ||
1495 | err = whitespace_error_string(result); | |
1496 | fprintf(stderr, "%s:%d: %s.\n%.*s\n", | |
1497 | patch_input_file, linenr, err, len, line); | |
1498 | free(err); | |
1499 | } | |
1500 | ||
1501 | static void check_whitespace(const char *line, int len, unsigned ws_rule) | |
1502 | { | |
1503 | unsigned result = ws_check(line + 1, len - 1, ws_rule); | |
1504 | ||
1505 | record_ws_error(result, line + 1, len - 2, linenr); | |
d0c25035 JH |
1506 | } |
1507 | ||
c1bb9350 | 1508 | /* |
4be60962 JH |
1509 | * Parse a unified diff. Note that this really needs to parse each |
1510 | * fragment separately, since the only way to know the difference | |
1511 | * between a "---" that is part of a patch, and a "---" that starts | |
1512 | * the next patch is to look at the line counts.. | |
c1bb9350 | 1513 | */ |
26693ba8 | 1514 | static int parse_fragment(const char *line, unsigned long size, |
81bf96bb | 1515 | struct patch *patch, struct fragment *fragment) |
c1bb9350 | 1516 | { |
3f40315a | 1517 | int added, deleted; |
c1bb9350 | 1518 | int len = linelen(line, size), offset; |
30996652 | 1519 | unsigned long oldlines, newlines; |
47495887 | 1520 | unsigned long leading, trailing; |
c1bb9350 | 1521 | |
19c58fb8 | 1522 | offset = parse_fragment_header(line, len, fragment); |
c1bb9350 LT |
1523 | if (offset < 0) |
1524 | return -1; | |
c14b9d1e JS |
1525 | if (offset > 0 && patch->recount) |
1526 | recount_diff(line + offset, size - offset, fragment); | |
19c58fb8 LT |
1527 | oldlines = fragment->oldlines; |
1528 | newlines = fragment->newlines; | |
47495887 EB |
1529 | leading = 0; |
1530 | trailing = 0; | |
c1bb9350 LT |
1531 | |
1532 | /* Parse the thing.. */ | |
1533 | line += len; | |
1534 | size -= len; | |
46979f56 | 1535 | linenr++; |
3f40315a | 1536 | added = deleted = 0; |
4be60962 JH |
1537 | for (offset = len; |
1538 | 0 < size; | |
1539 | offset += len, size -= len, line += len, linenr++) { | |
c1bb9350 LT |
1540 | if (!oldlines && !newlines) |
1541 | break; | |
1542 | len = linelen(line, size); | |
1543 | if (!len || line[len-1] != '\n') | |
1544 | return -1; | |
1545 | switch (*line) { | |
1546 | default: | |
1547 | return -1; | |
b507b465 | 1548 | case '\n': /* newer GNU diff, an empty context line */ |
c1bb9350 LT |
1549 | case ' ': |
1550 | oldlines--; | |
1551 | newlines--; | |
47495887 EB |
1552 | if (!deleted && !added) |
1553 | leading++; | |
1554 | trailing++; | |
c1bb9350 LT |
1555 | break; |
1556 | case '-': | |
5fda48d6 | 1557 | if (apply_in_reverse && |
81bf96bb | 1558 | ws_error_action != nowarn_ws_error) |
cf1b7869 | 1559 | check_whitespace(line, len, patch->ws_rule); |
3f40315a | 1560 | deleted++; |
c1bb9350 | 1561 | oldlines--; |
47495887 | 1562 | trailing = 0; |
c1bb9350 LT |
1563 | break; |
1564 | case '+': | |
5fda48d6 | 1565 | if (!apply_in_reverse && |
81bf96bb | 1566 | ws_error_action != nowarn_ws_error) |
cf1b7869 | 1567 | check_whitespace(line, len, patch->ws_rule); |
3f40315a | 1568 | added++; |
c1bb9350 | 1569 | newlines--; |
47495887 | 1570 | trailing = 0; |
c1bb9350 | 1571 | break; |
433ef8a2 | 1572 | |
81bf96bb JH |
1573 | /* |
1574 | * We allow "\ No newline at end of file". Depending | |
433ef8a2 FK |
1575 | * on locale settings when the patch was produced we |
1576 | * don't know what this line looks like. The only | |
56d33b11 JH |
1577 | * thing we do know is that it begins with "\ ". |
1578 | * Checking for 12 is just for sanity check -- any | |
1579 | * l10n of "\ No newline..." is at least that long. | |
1580 | */ | |
fab2c257 | 1581 | case '\\': |
433ef8a2 | 1582 | if (len < 12 || memcmp(line, "\\ ", 2)) |
3cca928d | 1583 | return -1; |
fab2c257 | 1584 | break; |
c1bb9350 LT |
1585 | } |
1586 | } | |
c1504628 LT |
1587 | if (oldlines || newlines) |
1588 | return -1; | |
47495887 EB |
1589 | fragment->leading = leading; |
1590 | fragment->trailing = trailing; | |
1591 | ||
81bf96bb JH |
1592 | /* |
1593 | * If a fragment ends with an incomplete line, we failed to include | |
8b64647d JH |
1594 | * it in the above loop because we hit oldlines == newlines == 0 |
1595 | * before seeing it. | |
1596 | */ | |
433ef8a2 | 1597 | if (12 < size && !memcmp(line, "\\ ", 2)) |
8b64647d JH |
1598 | offset += linelen(line, size); |
1599 | ||
3f40315a LT |
1600 | patch->lines_added += added; |
1601 | patch->lines_deleted += deleted; | |
4be60962 JH |
1602 | |
1603 | if (0 < patch->is_new && oldlines) | |
1604 | return error("new file depends on old contents"); | |
1605 | if (0 < patch->is_delete && newlines) | |
1606 | return error("deleted file still has contents"); | |
c1bb9350 LT |
1607 | return offset; |
1608 | } | |
1609 | ||
26693ba8 | 1610 | static int parse_single_patch(const char *line, unsigned long size, struct patch *patch) |
c1bb9350 LT |
1611 | { |
1612 | unsigned long offset = 0; | |
4be60962 | 1613 | unsigned long oldlines = 0, newlines = 0, context = 0; |
19c58fb8 | 1614 | struct fragment **fragp = &patch->fragments; |
c1bb9350 LT |
1615 | |
1616 | while (size > 4 && !memcmp(line, "@@ -", 4)) { | |
19c58fb8 LT |
1617 | struct fragment *fragment; |
1618 | int len; | |
1619 | ||
90321c10 | 1620 | fragment = xcalloc(1, sizeof(*fragment)); |
77b15bbd | 1621 | fragment->linenr = linenr; |
19c58fb8 | 1622 | len = parse_fragment(line, size, patch, fragment); |
c1bb9350 | 1623 | if (len <= 0) |
46979f56 | 1624 | die("corrupt patch at line %d", linenr); |
19c58fb8 LT |
1625 | fragment->patch = line; |
1626 | fragment->size = len; | |
4be60962 JH |
1627 | oldlines += fragment->oldlines; |
1628 | newlines += fragment->newlines; | |
1629 | context += fragment->leading + fragment->trailing; | |
19c58fb8 LT |
1630 | |
1631 | *fragp = fragment; | |
1632 | fragp = &fragment->next; | |
c1bb9350 LT |
1633 | |
1634 | offset += len; | |
1635 | line += len; | |
1636 | size -= len; | |
1637 | } | |
4be60962 JH |
1638 | |
1639 | /* | |
1640 | * If something was removed (i.e. we have old-lines) it cannot | |
1641 | * be creation, and if something was added it cannot be | |
1642 | * deletion. However, the reverse is not true; --unified=0 | |
1643 | * patches that only add are not necessarily creation even | |
1644 | * though they do not have any old lines, and ones that only | |
1645 | * delete are not necessarily deletion. | |
1646 | * | |
1647 | * Unfortunately, a real creation/deletion patch do _not_ have | |
1648 | * any context line by definition, so we cannot safely tell it | |
1649 | * apart with --unified=0 insanity. At least if the patch has | |
1650 | * more than one hunk it is not creation or deletion. | |
1651 | */ | |
1652 | if (patch->is_new < 0 && | |
1653 | (oldlines || (patch->fragments && patch->fragments->next))) | |
1654 | patch->is_new = 0; | |
1655 | if (patch->is_delete < 0 && | |
1656 | (newlines || (patch->fragments && patch->fragments->next))) | |
1657 | patch->is_delete = 0; | |
4be60962 JH |
1658 | |
1659 | if (0 < patch->is_new && oldlines) | |
1660 | die("new file %s depends on old contents", patch->new_name); | |
1661 | if (0 < patch->is_delete && newlines) | |
1662 | die("deleted file %s still has contents", patch->old_name); | |
1663 | if (!patch->is_delete && !newlines && context) | |
1664 | fprintf(stderr, "** warning: file %s becomes empty but " | |
1665 | "is not deleted\n", patch->new_name); | |
1666 | ||
c1bb9350 LT |
1667 | return offset; |
1668 | } | |
1669 | ||
1fea629f LT |
1670 | static inline int metadata_changes(struct patch *patch) |
1671 | { | |
1672 | return patch->is_rename > 0 || | |
1673 | patch->is_copy > 0 || | |
1674 | patch->is_new > 0 || | |
1675 | patch->is_delete || | |
1676 | (patch->old_mode && patch->new_mode && | |
1677 | patch->old_mode != patch->new_mode); | |
1678 | } | |
1679 | ||
3cd4f5e8 JH |
1680 | static char *inflate_it(const void *data, unsigned long size, |
1681 | unsigned long inflated_size) | |
051308f6 | 1682 | { |
ef49a7a0 | 1683 | git_zstream stream; |
3cd4f5e8 JH |
1684 | void *out; |
1685 | int st; | |
1686 | ||
1687 | memset(&stream, 0, sizeof(stream)); | |
1688 | ||
1689 | stream.next_in = (unsigned char *)data; | |
1690 | stream.avail_in = size; | |
1691 | stream.next_out = out = xmalloc(inflated_size); | |
1692 | stream.avail_out = inflated_size; | |
39c68542 LT |
1693 | git_inflate_init(&stream); |
1694 | st = git_inflate(&stream, Z_FINISH); | |
1695 | git_inflate_end(&stream); | |
3cd4f5e8 JH |
1696 | if ((st != Z_STREAM_END) || stream.total_out != inflated_size) { |
1697 | free(out); | |
1698 | return NULL; | |
1699 | } | |
1700 | return out; | |
1701 | } | |
1702 | ||
1703 | static struct fragment *parse_binary_hunk(char **buf_p, | |
1704 | unsigned long *sz_p, | |
1705 | int *status_p, | |
1706 | int *used_p) | |
1707 | { | |
81bf96bb JH |
1708 | /* |
1709 | * Expect a line that begins with binary patch method ("literal" | |
3cd4f5e8 JH |
1710 | * or "delta"), followed by the length of data before deflating. |
1711 | * a sequence of 'length-byte' followed by base-85 encoded data | |
1712 | * should follow, terminated by a newline. | |
051308f6 JH |
1713 | * |
1714 | * Each 5-byte sequence of base-85 encodes up to 4 bytes, | |
1715 | * and we would limit the patch line to 66 characters, | |
1716 | * so one line can fit up to 13 groups that would decode | |
1717 | * to 52 bytes max. The length byte 'A'-'Z' corresponds | |
1718 | * to 1-26 bytes, and 'a'-'z' corresponds to 27-52 bytes. | |
051308f6 JH |
1719 | */ |
1720 | int llen, used; | |
3cd4f5e8 JH |
1721 | unsigned long size = *sz_p; |
1722 | char *buffer = *buf_p; | |
1723 | int patch_method; | |
1724 | unsigned long origlen; | |
0660626c | 1725 | char *data = NULL; |
3cd4f5e8 JH |
1726 | int hunk_size = 0; |
1727 | struct fragment *frag; | |
051308f6 | 1728 | |
0660626c JH |
1729 | llen = linelen(buffer, size); |
1730 | used = llen; | |
3cd4f5e8 JH |
1731 | |
1732 | *status_p = 0; | |
0660626c | 1733 | |
cc44c765 | 1734 | if (!prefixcmp(buffer, "delta ")) { |
3cd4f5e8 JH |
1735 | patch_method = BINARY_DELTA_DEFLATED; |
1736 | origlen = strtoul(buffer + 6, NULL, 10); | |
0660626c | 1737 | } |
cc44c765 | 1738 | else if (!prefixcmp(buffer, "literal ")) { |
3cd4f5e8 JH |
1739 | patch_method = BINARY_LITERAL_DEFLATED; |
1740 | origlen = strtoul(buffer + 8, NULL, 10); | |
0660626c JH |
1741 | } |
1742 | else | |
3cd4f5e8 JH |
1743 | return NULL; |
1744 | ||
1745 | linenr++; | |
0660626c | 1746 | buffer += llen; |
051308f6 JH |
1747 | while (1) { |
1748 | int byte_length, max_byte_length, newsize; | |
1749 | llen = linelen(buffer, size); | |
1750 | used += llen; | |
1751 | linenr++; | |
03eb8f8a JH |
1752 | if (llen == 1) { |
1753 | /* consume the blank line */ | |
1754 | buffer++; | |
1755 | size--; | |
051308f6 | 1756 | break; |
03eb8f8a | 1757 | } |
81bf96bb JH |
1758 | /* |
1759 | * Minimum line is "A00000\n" which is 7-byte long, | |
051308f6 JH |
1760 | * and the line length must be multiple of 5 plus 2. |
1761 | */ | |
1762 | if ((llen < 7) || (llen-2) % 5) | |
1763 | goto corrupt; | |
1764 | max_byte_length = (llen - 2) / 5 * 4; | |
1765 | byte_length = *buffer; | |
1766 | if ('A' <= byte_length && byte_length <= 'Z') | |
1767 | byte_length = byte_length - 'A' + 1; | |
1768 | else if ('a' <= byte_length && byte_length <= 'z') | |
1769 | byte_length = byte_length - 'a' + 27; | |
1770 | else | |
1771 | goto corrupt; | |
1772 | /* if the input length was not multiple of 4, we would | |
1773 | * have filler at the end but the filler should never | |
1774 | * exceed 3 bytes | |
1775 | */ | |
1776 | if (max_byte_length < byte_length || | |
1777 | byte_length <= max_byte_length - 4) | |
1778 | goto corrupt; | |
3cd4f5e8 | 1779 | newsize = hunk_size + byte_length; |
0660626c | 1780 | data = xrealloc(data, newsize); |
3cd4f5e8 | 1781 | if (decode_85(data + hunk_size, buffer + 1, byte_length)) |
051308f6 | 1782 | goto corrupt; |
3cd4f5e8 | 1783 | hunk_size = newsize; |
051308f6 JH |
1784 | buffer += llen; |
1785 | size -= llen; | |
1786 | } | |
3cd4f5e8 JH |
1787 | |
1788 | frag = xcalloc(1, sizeof(*frag)); | |
1789 | frag->patch = inflate_it(data, hunk_size, origlen); | |
6fe53908 | 1790 | frag->free_patch = 1; |
3cd4f5e8 JH |
1791 | if (!frag->patch) |
1792 | goto corrupt; | |
1793 | free(data); | |
1794 | frag->size = origlen; | |
1795 | *buf_p = buffer; | |
1796 | *sz_p = size; | |
1797 | *used_p = used; | |
1798 | frag->binary_patch_method = patch_method; | |
1799 | return frag; | |
1800 | ||
051308f6 | 1801 | corrupt: |
4cac42b1 | 1802 | free(data); |
3cd4f5e8 JH |
1803 | *status_p = -1; |
1804 | error("corrupt binary patch at line %d: %.*s", | |
1805 | linenr-1, llen-1, buffer); | |
1806 | return NULL; | |
1807 | } | |
1808 | ||
1809 | static int parse_binary(char *buffer, unsigned long size, struct patch *patch) | |
1810 | { | |
81bf96bb JH |
1811 | /* |
1812 | * We have read "GIT binary patch\n"; what follows is a line | |
3cd4f5e8 JH |
1813 | * that says the patch method (currently, either "literal" or |
1814 | * "delta") and the length of data before deflating; a | |
1815 | * sequence of 'length-byte' followed by base-85 encoded data | |
1816 | * follows. | |
1817 | * | |
1818 | * When a binary patch is reversible, there is another binary | |
1819 | * hunk in the same format, starting with patch method (either | |
1820 | * "literal" or "delta") with the length of data, and a sequence | |
1821 | * of length-byte + base-85 encoded data, terminated with another | |
1822 | * empty line. This data, when applied to the postimage, produces | |
1823 | * the preimage. | |
1824 | */ | |
1825 | struct fragment *forward; | |
1826 | struct fragment *reverse; | |
1827 | int status; | |
1828 | int used, used_1; | |
1829 | ||
1830 | forward = parse_binary_hunk(&buffer, &size, &status, &used); | |
1831 | if (!forward && !status) | |
1832 | /* there has to be one hunk (forward hunk) */ | |
1833 | return error("unrecognized binary patch at line %d", linenr-1); | |
1834 | if (status) | |
1835 | /* otherwise we already gave an error message */ | |
1836 | return status; | |
1837 | ||
1838 | reverse = parse_binary_hunk(&buffer, &size, &status, &used_1); | |
1839 | if (reverse) | |
1840 | used += used_1; | |
1841 | else if (status) { | |
81bf96bb JH |
1842 | /* |
1843 | * Not having reverse hunk is not an error, but having | |
3cd4f5e8 JH |
1844 | * a corrupt reverse hunk is. |
1845 | */ | |
1846 | free((void*) forward->patch); | |
1847 | free(forward); | |
1848 | return status; | |
1849 | } | |
1850 | forward->next = reverse; | |
1851 | patch->fragments = forward; | |
1852 | patch->is_binary = 1; | |
1853 | return used; | |
051308f6 JH |
1854 | } |
1855 | ||
19c58fb8 | 1856 | static int parse_chunk(char *buffer, unsigned long size, struct patch *patch) |
c1bb9350 LT |
1857 | { |
1858 | int hdrsize, patchsize; | |
19c58fb8 | 1859 | int offset = find_header(buffer, size, &hdrsize, patch); |
c1bb9350 LT |
1860 | |
1861 | if (offset < 0) | |
1862 | return offset; | |
c1bb9350 | 1863 | |
cf1b7869 JH |
1864 | patch->ws_rule = whitespace_rule(patch->new_name |
1865 | ? patch->new_name | |
1866 | : patch->old_name); | |
1867 | ||
81bf96bb JH |
1868 | patchsize = parse_single_patch(buffer + offset + hdrsize, |
1869 | size - offset - hdrsize, patch); | |
c1bb9350 | 1870 | |
92927ed0 | 1871 | if (!patchsize) { |
3200d1ae JH |
1872 | static const char *binhdr[] = { |
1873 | "Binary files ", | |
1874 | "Files ", | |
1875 | NULL, | |
1876 | }; | |
051308f6 | 1877 | static const char git_binary[] = "GIT binary patch\n"; |
3200d1ae JH |
1878 | int i; |
1879 | int hd = hdrsize + offset; | |
1880 | unsigned long llen = linelen(buffer + hd, size - hd); | |
1881 | ||
051308f6 JH |
1882 | if (llen == sizeof(git_binary) - 1 && |
1883 | !memcmp(git_binary, buffer + hd, llen)) { | |
1884 | int used; | |
1885 | linenr++; | |
1886 | used = parse_binary(buffer + hd + llen, | |
1887 | size - hd - llen, patch); | |
1888 | if (used) | |
1889 | patchsize = used + llen; | |
1890 | else | |
1891 | patchsize = 0; | |
1892 | } | |
1893 | else if (!memcmp(" differ\n", buffer + hd + llen - 8, 8)) { | |
3200d1ae JH |
1894 | for (i = 0; binhdr[i]; i++) { |
1895 | int len = strlen(binhdr[i]); | |
1896 | if (len < size - hd && | |
1897 | !memcmp(binhdr[i], buffer + hd, len)) { | |
051308f6 | 1898 | linenr++; |
3200d1ae | 1899 | patch->is_binary = 1; |
051308f6 | 1900 | patchsize = llen; |
3200d1ae JH |
1901 | break; |
1902 | } | |
1903 | } | |
051308f6 | 1904 | } |
ff36de08 | 1905 | |
2b6eef94 JH |
1906 | /* Empty patch cannot be applied if it is a text patch |
1907 | * without metadata change. A binary patch appears | |
1908 | * empty to us here. | |
92927ed0 JH |
1909 | */ |
1910 | if ((apply || check) && | |
2b6eef94 | 1911 | (!patch->is_binary && !metadata_changes(patch))) |
ff36de08 JH |
1912 | die("patch with only garbage at line %d", linenr); |
1913 | } | |
1fea629f | 1914 | |
c1bb9350 LT |
1915 | return offset + hdrsize + patchsize; |
1916 | } | |
1917 | ||
e5a94313 JS |
1918 | #define swap(a,b) myswap((a),(b),sizeof(a)) |
1919 | ||
1920 | #define myswap(a, b, size) do { \ | |
1921 | unsigned char mytmp[size]; \ | |
1922 | memcpy(mytmp, &a, size); \ | |
1923 | memcpy(&a, &b, size); \ | |
1924 | memcpy(&b, mytmp, size); \ | |
1925 | } while (0) | |
1926 | ||
1927 | static void reverse_patches(struct patch *p) | |
1928 | { | |
1929 | for (; p; p = p->next) { | |
1930 | struct fragment *frag = p->fragments; | |
1931 | ||
1932 | swap(p->new_name, p->old_name); | |
1933 | swap(p->new_mode, p->old_mode); | |
1934 | swap(p->is_new, p->is_delete); | |
1935 | swap(p->lines_added, p->lines_deleted); | |
1936 | swap(p->old_sha1_prefix, p->new_sha1_prefix); | |
1937 | ||
1938 | for (; frag; frag = frag->next) { | |
1939 | swap(frag->newpos, frag->oldpos); | |
1940 | swap(frag->newlines, frag->oldlines); | |
1941 | } | |
e5a94313 JS |
1942 | } |
1943 | } | |
1944 | ||
81bf96bb JH |
1945 | static const char pluses[] = |
1946 | "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"; | |
1947 | static const char minuses[]= | |
1948 | "----------------------------------------------------------------------"; | |
3f40315a LT |
1949 | |
1950 | static void show_stats(struct patch *patch) | |
1951 | { | |
f285a2d7 | 1952 | struct strbuf qname = STRBUF_INIT; |
663af342 PH |
1953 | char *cp = patch->new_name ? patch->new_name : patch->old_name; |
1954 | int max, add, del; | |
3f40315a | 1955 | |
663af342 | 1956 | quote_c_style(cp, &qname, NULL, 0); |
22943f1a | 1957 | |
3f40315a LT |
1958 | /* |
1959 | * "scale" the filename | |
1960 | */ | |
3f40315a LT |
1961 | max = max_len; |
1962 | if (max > 50) | |
1963 | max = 50; | |
663af342 PH |
1964 | |
1965 | if (qname.len > max) { | |
1966 | cp = strchr(qname.buf + qname.len + 3 - max, '/'); | |
1967 | if (!cp) | |
1968 | cp = qname.buf + qname.len + 3 - max; | |
1969 | strbuf_splice(&qname, 0, cp - qname.buf, "...", 3); | |
1970 | } | |
1971 | ||
1972 | if (patch->is_binary) { | |
1973 | printf(" %-*s | Bin\n", max, qname.buf); | |
1974 | strbuf_release(&qname); | |
1975 | return; | |
62917097 | 1976 | } |
663af342 PH |
1977 | |
1978 | printf(" %-*s |", max, qname.buf); | |
1979 | strbuf_release(&qname); | |
3f40315a LT |
1980 | |
1981 | /* | |
1982 | * scale the add/delete | |
1983 | */ | |
663af342 | 1984 | max = max + max_change > 70 ? 70 - max : max_change; |
95bedc9e LT |
1985 | add = patch->lines_added; |
1986 | del = patch->lines_deleted; | |
95bedc9e | 1987 | |
69f956e1 | 1988 | if (max_change > 0) { |
663af342 | 1989 | int total = ((add + del) * max + max_change / 2) / max_change; |
69f956e1 SV |
1990 | add = (add * max + max_change / 2) / max_change; |
1991 | del = total - add; | |
1992 | } | |
663af342 PH |
1993 | printf("%5d %.*s%.*s\n", patch->lines_added + patch->lines_deleted, |
1994 | add, pluses, del, minuses); | |
3f40315a LT |
1995 | } |
1996 | ||
c7f9cb14 | 1997 | static int read_old_data(struct stat *st, const char *path, struct strbuf *buf) |
3cca928d | 1998 | { |
3cca928d LT |
1999 | switch (st->st_mode & S_IFMT) { |
2000 | case S_IFLNK: | |
b11b7e13 LT |
2001 | if (strbuf_readlink(buf, path, st->st_size) < 0) |
2002 | return error("unable to read symlink %s", path); | |
c7f9cb14 | 2003 | return 0; |
3cca928d | 2004 | case S_IFREG: |
387e7e19 PH |
2005 | if (strbuf_read_file(buf, path, st->st_size) != st->st_size) |
2006 | return error("unable to open or read %s", path); | |
21e5ad50 | 2007 | convert_to_git(path, buf->buf, buf->len, buf, 0); |
c7f9cb14 | 2008 | return 0; |
3cca928d LT |
2009 | default: |
2010 | return -1; | |
2011 | } | |
2012 | } | |
2013 | ||
86c91f91 GB |
2014 | /* |
2015 | * Update the preimage, and the common lines in postimage, | |
2016 | * from buffer buf of length len. If postlen is 0 the postimage | |
2017 | * is updated in place, otherwise it's updated on a new buffer | |
2018 | * of length postlen | |
2019 | */ | |
2020 | ||
c1beba5b JH |
2021 | static void update_pre_post_images(struct image *preimage, |
2022 | struct image *postimage, | |
2023 | char *buf, | |
86c91f91 | 2024 | size_t len, size_t postlen) |
3cca928d | 2025 | { |
c1beba5b JH |
2026 | int i, ctx; |
2027 | char *new, *old, *fixed; | |
2028 | struct image fixed_preimage; | |
3cca928d | 2029 | |
c1beba5b JH |
2030 | /* |
2031 | * Update the preimage with whitespace fixes. Note that we | |
2032 | * are not losing preimage->buf -- apply_one_fragment() will | |
2033 | * free "oldlines". | |
2034 | */ | |
2035 | prepare_image(&fixed_preimage, buf, len, 1); | |
2036 | assert(fixed_preimage.nr == preimage->nr); | |
2037 | for (i = 0; i < preimage->nr; i++) | |
2038 | fixed_preimage.line[i].flag = preimage->line[i].flag; | |
2039 | free(preimage->line_allocated); | |
2040 | *preimage = fixed_preimage; | |
3cca928d | 2041 | |
c1beba5b | 2042 | /* |
86c91f91 GB |
2043 | * Adjust the common context lines in postimage. This can be |
2044 | * done in-place when we are just doing whitespace fixing, | |
2045 | * which does not make the string grow, but needs a new buffer | |
2046 | * when ignoring whitespace causes the update, since in this case | |
2047 | * we could have e.g. tabs converted to multiple spaces. | |
2048 | * We trust the caller to tell us if the update can be done | |
2049 | * in place (postlen==0) or not. | |
c1beba5b | 2050 | */ |
86c91f91 GB |
2051 | old = postimage->buf; |
2052 | if (postlen) | |
2053 | new = postimage->buf = xmalloc(postlen); | |
2054 | else | |
2055 | new = old; | |
c1beba5b JH |
2056 | fixed = preimage->buf; |
2057 | for (i = ctx = 0; i < postimage->nr; i++) { | |
2058 | size_t len = postimage->line[i].len; | |
2059 | if (!(postimage->line[i].flag & LINE_COMMON)) { | |
2060 | /* an added line -- no counterparts in preimage */ | |
2061 | memmove(new, old, len); | |
2062 | old += len; | |
2063 | new += len; | |
2064 | continue; | |
3cca928d | 2065 | } |
c1beba5b JH |
2066 | |
2067 | /* a common context -- skip it in the original postimage */ | |
2068 | old += len; | |
2069 | ||
2070 | /* and find the corresponding one in the fixed preimage */ | |
2071 | while (ctx < preimage->nr && | |
2072 | !(preimage->line[ctx].flag & LINE_COMMON)) { | |
2073 | fixed += preimage->line[ctx].len; | |
2074 | ctx++; | |
2075 | } | |
2076 | if (preimage->nr <= ctx) | |
2077 | die("oops"); | |
2078 | ||
2079 | /* and copy it in, while fixing the line length */ | |
2080 | len = preimage->line[ctx].len; | |
2081 | memcpy(new, fixed, len); | |
2082 | new += len; | |
2083 | fixed += len; | |
2084 | postimage->line[i].len = len; | |
2085 | ctx++; | |
2086 | } | |
2087 | ||
2088 | /* Fix the length of the whole thing */ | |
2089 | postimage->len = new - postimage->buf; | |
2090 | } | |
2091 | ||
b94f2eda JH |
2092 | static int match_fragment(struct image *img, |
2093 | struct image *preimage, | |
2094 | struct image *postimage, | |
c89fb6b1 | 2095 | unsigned long try, |
b94f2eda | 2096 | int try_lno, |
c607aaa2 | 2097 | unsigned ws_rule, |
dc41976a | 2098 | int match_beginning, int match_end) |
c89fb6b1 | 2099 | { |
b94f2eda | 2100 | int i; |
c1beba5b | 2101 | char *fixed_buf, *buf, *orig, *target; |
d511bd33 CW |
2102 | struct strbuf fixed; |
2103 | size_t fixed_len; | |
51667147 | 2104 | int preimage_limit; |
b94f2eda | 2105 | |
51667147 BG |
2106 | if (preimage->nr + try_lno <= img->nr) { |
2107 | /* | |
2108 | * The hunk falls within the boundaries of img. | |
2109 | */ | |
2110 | preimage_limit = preimage->nr; | |
2111 | if (match_end && (preimage->nr + try_lno != img->nr)) | |
2112 | return 0; | |
2113 | } else if (ws_error_action == correct_ws_error && | |
0c3ef984 | 2114 | (ws_rule & WS_BLANK_AT_EOF)) { |
51667147 | 2115 | /* |
0c3ef984 BG |
2116 | * This hunk extends beyond the end of img, and we are |
2117 | * removing blank lines at the end of the file. This | |
2118 | * many lines from the beginning of the preimage must | |
2119 | * match with img, and the remainder of the preimage | |
2120 | * must be blank. | |
51667147 BG |
2121 | */ |
2122 | preimage_limit = img->nr - try_lno; | |
2123 | } else { | |
2124 | /* | |
2125 | * The hunk extends beyond the end of the img and | |
2126 | * we are not removing blanks at the end, so we | |
2127 | * should reject the hunk at this position. | |
2128 | */ | |
b94f2eda | 2129 | return 0; |
51667147 | 2130 | } |
b94f2eda JH |
2131 | |
2132 | if (match_beginning && try_lno) | |
c89fb6b1 | 2133 | return 0; |
dc41976a | 2134 | |
b94f2eda | 2135 | /* Quick hash check */ |
51667147 | 2136 | for (i = 0; i < preimage_limit; i++) |
9d158601 JH |
2137 | if ((img->line[try_lno + i].flag & LINE_PATCHED) || |
2138 | (preimage->line[i].hash != img->line[try_lno + i].hash)) | |
b94f2eda JH |
2139 | return 0; |
2140 | ||
51667147 BG |
2141 | if (preimage_limit == preimage->nr) { |
2142 | /* | |
2143 | * Do we have an exact match? If we were told to match | |
2144 | * at the end, size must be exactly at try+fragsize, | |
2145 | * otherwise try+fragsize must be still within the preimage, | |
2146 | * and either case, the old piece should match the preimage | |
2147 | * exactly. | |
2148 | */ | |
2149 | if ((match_end | |
2150 | ? (try + preimage->len == img->len) | |
2151 | : (try + preimage->len <= img->len)) && | |
2152 | !memcmp(img->buf + try, preimage->buf, preimage->len)) | |
2153 | return 1; | |
2154 | } else { | |
2155 | /* | |
2156 | * The preimage extends beyond the end of img, so | |
2157 | * there cannot be an exact match. | |
2158 | * | |
2159 | * There must be one non-blank context line that match | |
2160 | * a line before the end of img. | |
2161 | */ | |
2162 | char *buf_end; | |
2163 | ||
2164 | buf = preimage->buf; | |
2165 | buf_end = buf; | |
2166 | for (i = 0; i < preimage_limit; i++) | |
2167 | buf_end += preimage->line[i].len; | |
2168 | ||
2169 | for ( ; buf < buf_end; buf++) | |
2170 | if (!isspace(*buf)) | |
2171 | break; | |
2172 | if (buf == buf_end) | |
2173 | return 0; | |
2174 | } | |
dc41976a | 2175 | |
86c91f91 GB |
2176 | /* |
2177 | * No exact match. If we are ignoring whitespace, run a line-by-line | |
2178 | * fuzzy matching. We collect all the line length information because | |
2179 | * we need it to adjust whitespace if we match. | |
2180 | */ | |
2181 | if (ws_ignore_action == ignore_ws_change) { | |
2182 | size_t imgoff = 0; | |
2183 | size_t preoff = 0; | |
2184 | size_t postlen = postimage->len; | |
51667147 BG |
2185 | size_t extra_chars; |
2186 | char *preimage_eof; | |
2187 | char *preimage_end; | |
2188 | for (i = 0; i < preimage_limit; i++) { | |
86c91f91 | 2189 | size_t prelen = preimage->line[i].len; |
0b1fac32 | 2190 | size_t imglen = img->line[try_lno+i].len; |
86c91f91 | 2191 | |
0b1fac32 JH |
2192 | if (!fuzzy_matchlines(img->buf + try + imgoff, imglen, |
2193 | preimage->buf + preoff, prelen)) | |
86c91f91 GB |
2194 | return 0; |
2195 | if (preimage->line[i].flag & LINE_COMMON) | |
0b1fac32 JH |
2196 | postlen += imglen - prelen; |
2197 | imgoff += imglen; | |
86c91f91 GB |
2198 | preoff += prelen; |
2199 | } | |
2200 | ||
2201 | /* | |
9b25949a BG |
2202 | * Ok, the preimage matches with whitespace fuzz. |
2203 | * | |
2204 | * imgoff now holds the true length of the target that | |
51667147 BG |
2205 | * matches the preimage before the end of the file. |
2206 | * | |
2207 | * Count the number of characters in the preimage that fall | |
2208 | * beyond the end of the file and make sure that all of them | |
2209 | * are whitespace characters. (This can only happen if | |
2210 | * we are removing blank lines at the end of the file.) | |
86c91f91 | 2211 | */ |
51667147 BG |
2212 | buf = preimage_eof = preimage->buf + preoff; |
2213 | for ( ; i < preimage->nr; i++) | |
2214 | preoff += preimage->line[i].len; | |
2215 | preimage_end = preimage->buf + preoff; | |
2216 | for ( ; buf < preimage_end; buf++) | |
2217 | if (!isspace(*buf)) | |
2218 | return 0; | |
2219 | ||
2220 | /* | |
2221 | * Update the preimage and the common postimage context | |
2222 | * lines to use the same whitespace as the target. | |
2223 | * If whitespace is missing in the target (i.e. | |
2224 | * if the preimage extends beyond the end of the file), | |
2225 | * use the whitespace from the preimage. | |
2226 | */ | |
2227 | extra_chars = preimage_end - preimage_eof; | |
d511bd33 CW |
2228 | strbuf_init(&fixed, imgoff + extra_chars); |
2229 | strbuf_add(&fixed, img->buf + try, imgoff); | |
2230 | strbuf_add(&fixed, preimage_eof, extra_chars); | |
2231 | fixed_buf = strbuf_detach(&fixed, &fixed_len); | |
86c91f91 | 2232 | update_pre_post_images(preimage, postimage, |
d511bd33 | 2233 | fixed_buf, fixed_len, postlen); |
86c91f91 GB |
2234 | return 1; |
2235 | } | |
2236 | ||
c1beba5b JH |
2237 | if (ws_error_action != correct_ws_error) |
2238 | return 0; | |
2239 | ||
dc41976a | 2240 | /* |
c1beba5b | 2241 | * The hunk does not apply byte-by-byte, but the hash says |
86c91f91 GB |
2242 | * it might with whitespace fuzz. We haven't been asked to |
2243 | * ignore whitespace, we were asked to correct whitespace | |
2244 | * errors, so let's try matching after whitespace correction. | |
51667147 BG |
2245 | * |
2246 | * The preimage may extend beyond the end of the file, | |
2247 | * but in this loop we will only handle the part of the | |
2248 | * preimage that falls within the file. | |
dc41976a | 2249 | */ |
d511bd33 | 2250 | strbuf_init(&fixed, preimage->len + 1); |
c1beba5b JH |
2251 | orig = preimage->buf; |
2252 | target = img->buf + try; | |
51667147 | 2253 | for (i = 0; i < preimage_limit; i++) { |
c1beba5b JH |
2254 | size_t oldlen = preimage->line[i].len; |
2255 | size_t tgtlen = img->line[try_lno + i].len; | |
d511bd33 CW |
2256 | size_t fixstart = fixed.len; |
2257 | struct strbuf tgtfix; | |
c1beba5b JH |
2258 | int match; |
2259 | ||
2260 | /* Try fixing the line in the preimage */ | |
d511bd33 | 2261 | ws_fix_copy(&fixed, orig, oldlen, ws_rule, NULL); |
c1beba5b JH |
2262 | |
2263 | /* Try fixing the line in the target */ | |
d511bd33 CW |
2264 | strbuf_init(&tgtfix, tgtlen); |
2265 | ws_fix_copy(&tgtfix, target, tgtlen, ws_rule, NULL); | |
c1beba5b JH |
2266 | |
2267 | /* | |
2268 | * If they match, either the preimage was based on | |
2269 | * a version before our tree fixed whitespace breakage, | |
2270 | * or we are lacking a whitespace-fix patch the tree | |
2271 | * the preimage was based on already had (i.e. target | |
2272 | * has whitespace breakage, the preimage doesn't). | |
2273 | * In either case, we are fixing the whitespace breakages | |
2274 | * so we might as well take the fix together with their | |
2275 | * real change. | |
2276 | */ | |
d511bd33 CW |
2277 | match = (tgtfix.len == fixed.len - fixstart && |
2278 | !memcmp(tgtfix.buf, fixed.buf + fixstart, | |
2279 | fixed.len - fixstart)); | |
c1beba5b | 2280 | |
d511bd33 | 2281 | strbuf_release(&tgtfix); |
c1beba5b JH |
2282 | if (!match) |
2283 | goto unmatch_exit; | |
2284 | ||
2285 | orig += oldlen; | |
c1beba5b | 2286 | target += tgtlen; |
3cca928d LT |
2287 | } |
2288 | ||
51667147 BG |
2289 | |
2290 | /* | |
2291 | * Now handle the lines in the preimage that falls beyond the | |
2292 | * end of the file (if any). They will only match if they are | |
2293 | * empty or only contain whitespace (if WS_BLANK_AT_EOL is | |
2294 | * false). | |
2295 | */ | |
2296 | for ( ; i < preimage->nr; i++) { | |
d511bd33 | 2297 | size_t fixstart = fixed.len; /* start of the fixed preimage */ |
51667147 BG |
2298 | size_t oldlen = preimage->line[i].len; |
2299 | int j; | |
2300 | ||
2301 | /* Try fixing the line in the preimage */ | |
d511bd33 | 2302 | ws_fix_copy(&fixed, orig, oldlen, ws_rule, NULL); |
51667147 | 2303 | |
d511bd33 CW |
2304 | for (j = fixstart; j < fixed.len; j++) |
2305 | if (!isspace(fixed.buf[j])) | |
51667147 BG |
2306 | goto unmatch_exit; |
2307 | ||
2308 | orig += oldlen; | |
51667147 BG |
2309 | } |
2310 | ||
c1beba5b JH |
2311 | /* |
2312 | * Yes, the preimage is based on an older version that still | |
2313 | * has whitespace breakages unfixed, and fixing them makes the | |
2314 | * hunk match. Update the context lines in the postimage. | |
2315 | */ | |
d511bd33 | 2316 | fixed_buf = strbuf_detach(&fixed, &fixed_len); |
c1beba5b | 2317 | update_pre_post_images(preimage, postimage, |
d511bd33 | 2318 | fixed_buf, fixed_len, 0); |
c1beba5b JH |
2319 | return 1; |
2320 | ||
2321 | unmatch_exit: | |
d511bd33 | 2322 | strbuf_release(&fixed); |
dc41976a | 2323 | return 0; |
c89fb6b1 JH |
2324 | } |
2325 | ||
b94f2eda JH |
2326 | static int find_pos(struct image *img, |
2327 | struct image *preimage, | |
2328 | struct image *postimage, | |
2329 | int line, | |
c607aaa2 | 2330 | unsigned ws_rule, |
b94f2eda | 2331 | int match_beginning, int match_end) |
3cca928d | 2332 | { |
b94f2eda JH |
2333 | int i; |
2334 | unsigned long backwards, forwards, try; | |
2335 | int backwards_lno, forwards_lno, try_lno; | |
3cca928d | 2336 | |
ecf4c2ec | 2337 | /* |
24ff4d56 | 2338 | * If match_beginning or match_end is specified, there is no |
ecf4c2ec JH |
2339 | * point starting from a wrong line that will never match and |
2340 | * wander around and wait for a match at the specified end. | |
2341 | */ | |
2342 | if (match_beginning) | |
2343 | line = 0; | |
2344 | else if (match_end) | |
2345 | line = img->nr - preimage->nr; | |
2346 | ||
24ff4d56 BG |
2347 | /* |
2348 | * Because the comparison is unsigned, the following test | |
2349 | * will also take care of a negative line number that can | |
2350 | * result when match_end and preimage is larger than the target. | |
2351 | */ | |
2352 | if ((size_t) line > img->nr) | |
52f3c81a JH |
2353 | line = img->nr; |
2354 | ||
b94f2eda JH |
2355 | try = 0; |
2356 | for (i = 0; i < line; i++) | |
2357 | try += img->line[i].len; | |
3cca928d | 2358 | |
6e7c92a9 LT |
2359 | /* |
2360 | * There's probably some smart way to do this, but I'll leave | |
2361 | * that to the smart and beautiful people. I'm simple and stupid. | |
2362 | */ | |
b94f2eda JH |
2363 | backwards = try; |
2364 | backwards_lno = line; | |
2365 | forwards = try; | |
2366 | forwards_lno = line; | |
2367 | try_lno = line; | |
fcb77bc5 | 2368 | |
6e7c92a9 | 2369 | for (i = 0; ; i++) { |
b94f2eda | 2370 | if (match_fragment(img, preimage, postimage, |
c607aaa2 | 2371 | try, try_lno, ws_rule, |
b94f2eda JH |
2372 | match_beginning, match_end)) |
2373 | return try_lno; | |
fcb77bc5 JH |
2374 | |
2375 | again: | |
b94f2eda | 2376 | if (backwards_lno == 0 && forwards_lno == img->nr) |
fcb77bc5 | 2377 | break; |
6e7c92a9 | 2378 | |
6e7c92a9 | 2379 | if (i & 1) { |
b94f2eda | 2380 | if (backwards_lno == 0) { |
fcb77bc5 JH |
2381 | i++; |
2382 | goto again; | |
6e7c92a9 | 2383 | } |
b94f2eda JH |
2384 | backwards_lno--; |
2385 | backwards -= img->line[backwards_lno].len; | |
6e7c92a9 | 2386 | try = backwards; |
b94f2eda | 2387 | try_lno = backwards_lno; |
6e7c92a9 | 2388 | } else { |
b94f2eda | 2389 | if (forwards_lno == img->nr) { |
fcb77bc5 JH |
2390 | i++; |
2391 | goto again; | |
6e7c92a9 | 2392 | } |
b94f2eda JH |
2393 | forwards += img->line[forwards_lno].len; |
2394 | forwards_lno++; | |
6e7c92a9 | 2395 | try = forwards; |
b94f2eda | 2396 | try_lno = forwards_lno; |
6e7c92a9 LT |
2397 | } |
2398 | ||
6e7c92a9 | 2399 | } |
3cca928d LT |
2400 | return -1; |
2401 | } | |
2402 | ||
b94f2eda | 2403 | static void remove_first_line(struct image *img) |
47495887 | 2404 | { |
b94f2eda JH |
2405 | img->buf += img->line[0].len; |
2406 | img->len -= img->line[0].len; | |
2407 | img->line++; | |
2408 | img->nr--; | |
47495887 EB |
2409 | } |
2410 | ||
b94f2eda | 2411 | static void remove_last_line(struct image *img) |
47495887 | 2412 | { |
b94f2eda | 2413 | img->len -= img->line[--img->nr].len; |
47495887 EB |
2414 | } |
2415 | ||
b94f2eda JH |
2416 | static void update_image(struct image *img, |
2417 | int applied_pos, | |
2418 | struct image *preimage, | |
2419 | struct image *postimage) | |
b5767dd6 | 2420 | { |
81bf96bb | 2421 | /* |
b94f2eda JH |
2422 | * remove the copy of preimage at offset in img |
2423 | * and replace it with postimage | |
81bf96bb | 2424 | */ |
b94f2eda JH |
2425 | int i, nr; |
2426 | size_t remove_count, insert_count, applied_at = 0; | |
2427 | char *result; | |
51667147 BG |
2428 | int preimage_limit; |
2429 | ||
2430 | /* | |
2431 | * If we are removing blank lines at the end of img, | |
2432 | * the preimage may extend beyond the end. | |
2433 | * If that is the case, we must be careful only to | |
2434 | * remove the part of the preimage that falls within | |
2435 | * the boundaries of img. Initialize preimage_limit | |
2436 | * to the number of lines in the preimage that falls | |
2437 | * within the boundaries. | |
2438 | */ | |
2439 | preimage_limit = preimage->nr; | |
2440 | if (preimage_limit > img->nr - applied_pos) | |
2441 | preimage_limit = img->nr - applied_pos; | |
d5a41641 | 2442 | |
b94f2eda JH |
2443 | for (i = 0; i < applied_pos; i++) |
2444 | applied_at += img->line[i].len; | |
2445 | ||
2446 | remove_count = 0; | |
51667147 | 2447 | for (i = 0; i < preimage_limit; i++) |
b94f2eda JH |
2448 | remove_count += img->line[applied_pos + i].len; |
2449 | insert_count = postimage->len; | |
2450 | ||
2451 | /* Adjust the contents */ | |
2452 | result = xmalloc(img->len + insert_count - remove_count + 1); | |
2453 | memcpy(result, img->buf, applied_at); | |
2454 | memcpy(result + applied_at, postimage->buf, postimage->len); | |
2455 | memcpy(result + applied_at + postimage->len, | |
2456 | img->buf + (applied_at + remove_count), | |
2457 | img->len - (applied_at + remove_count)); | |
2458 | free(img->buf); | |
2459 | img->buf = result; | |
2460 | img->len += insert_count - remove_count; | |
2461 | result[img->len] = '\0'; | |
2462 | ||
2463 | /* Adjust the line table */ | |
51667147 BG |
2464 | nr = img->nr + postimage->nr - preimage_limit; |
2465 | if (preimage_limit < postimage->nr) { | |
81bf96bb | 2466 | /* |
b94f2eda JH |
2467 | * NOTE: this knows that we never call remove_first_line() |
2468 | * on anything other than pre/post image. | |
d0c25035 | 2469 | */ |
b94f2eda JH |
2470 | img->line = xrealloc(img->line, nr * sizeof(*img->line)); |
2471 | img->line_allocated = img->line; | |
d0c25035 | 2472 | } |
51667147 | 2473 | if (preimage_limit != postimage->nr) |
b94f2eda | 2474 | memmove(img->line + applied_pos + postimage->nr, |
51667147 BG |
2475 | img->line + applied_pos + preimage_limit, |
2476 | (img->nr - (applied_pos + preimage_limit)) * | |
b94f2eda JH |
2477 | sizeof(*img->line)); |
2478 | memcpy(img->line + applied_pos, | |
2479 | postimage->line, | |
2480 | postimage->nr * sizeof(*img->line)); | |
933e44d3 JH |
2481 | if (!allow_overlap) |
2482 | for (i = 0; i < postimage->nr; i++) | |
2483 | img->line[applied_pos + i].flag |= LINE_PATCHED; | |
b94f2eda | 2484 | img->nr = nr; |
b5767dd6 JH |
2485 | } |
2486 | ||
b94f2eda | 2487 | static int apply_one_fragment(struct image *img, struct fragment *frag, |
334f8cb2 JH |
2488 | int inaccurate_eof, unsigned ws_rule, |
2489 | int nth_fragment) | |
3cca928d | 2490 | { |
65aadb92 | 2491 | int match_beginning, match_end; |
3cca928d | 2492 | const char *patch = frag->patch; |
b94f2eda | 2493 | int size = frag->size; |
d511bd33 CW |
2494 | char *old, *oldlines; |
2495 | struct strbuf newlines; | |
077e1af5 | 2496 | int new_blank_lines_at_end = 0; |
85572639 JH |
2497 | int found_new_blank_lines_at_end = 0; |
2498 | int hunk_linenr = frag->linenr; | |
47495887 | 2499 | unsigned long leading, trailing; |
b94f2eda JH |
2500 | int pos, applied_pos; |
2501 | struct image preimage; | |
2502 | struct image postimage; | |
3cca928d | 2503 | |
c330fdd4 JH |
2504 | memset(&preimage, 0, sizeof(preimage)); |
2505 | memset(&postimage, 0, sizeof(postimage)); | |
61e08cca | 2506 | oldlines = xmalloc(size); |
d511bd33 | 2507 | strbuf_init(&newlines, size); |
c330fdd4 | 2508 | |
61e08cca | 2509 | old = oldlines; |
3cca928d | 2510 | while (size > 0) { |
e5a94313 | 2511 | char first; |
3cca928d | 2512 | int len = linelen(patch, size); |
d511bd33 | 2513 | int plen; |
077e1af5 | 2514 | int added_blank_line = 0; |
efa57443 | 2515 | int is_blank_context = 0; |
d511bd33 | 2516 | size_t start; |
3cca928d LT |
2517 | |
2518 | if (!len) | |
2519 | break; | |
2520 | ||
2521 | /* | |
2522 | * "plen" is how much of the line we should use for | |
2523 | * the actual patch data. Normally we just remove the | |
2524 | * first character on the line, but if the line is | |
2525 | * followed by "\ No newline", then we also remove the | |
2526 | * last one (which is the newline, of course). | |
2527 | */ | |
61e08cca | 2528 | plen = len - 1; |
8b64647d | 2529 | if (len < size && patch[len] == '\\') |
3cca928d | 2530 | plen--; |
e5a94313 | 2531 | first = *patch; |
f686d030 | 2532 | if (apply_in_reverse) { |
e5a94313 JS |
2533 | if (first == '-') |
2534 | first = '+'; | |
2535 | else if (first == '+') | |
2536 | first = '-'; | |
2537 | } | |
efe7f358 | 2538 | |
e5a94313 | 2539 | switch (first) { |
b507b465 LT |
2540 | case '\n': |
2541 | /* Newer GNU diff, empty context line */ | |
2542 | if (plen < 0) | |
2543 | /* ... followed by '\No newline'; nothing */ | |
2544 | break; | |
61e08cca | 2545 | *old++ = '\n'; |
d511bd33 | 2546 | strbuf_addch(&newlines, '\n'); |
c330fdd4 JH |
2547 | add_line_info(&preimage, "\n", 1, LINE_COMMON); |
2548 | add_line_info(&postimage, "\n", 1, LINE_COMMON); | |
efa57443 | 2549 | is_blank_context = 1; |
b507b465 | 2550 | break; |
3cca928d | 2551 | case ' ': |
94ea026b JH |
2552 | if (plen && (ws_rule & WS_BLANK_AT_EOF) && |
2553 | ws_blank_line(patch + 1, plen, ws_rule)) | |
efa57443 | 2554 | is_blank_context = 1; |
3cca928d | 2555 | case '-': |
61e08cca JH |
2556 | memcpy(old, patch + 1, plen); |
2557 | add_line_info(&preimage, old, plen, | |
c330fdd4 | 2558 | (first == ' ' ? LINE_COMMON : 0)); |
61e08cca | 2559 | old += plen; |
e5a94313 | 2560 | if (first == '-') |
3cca928d LT |
2561 | break; |
2562 | /* Fall-through for ' ' */ | |
2563 | case '+': | |
8441a9a8 JH |
2564 | /* --no-add does not add new lines */ |
2565 | if (first == '+' && no_add) | |
2566 | break; | |
2567 | ||
d511bd33 | 2568 | start = newlines.len; |
8441a9a8 JH |
2569 | if (first != '+' || |
2570 | !whitespace_error || | |
2571 | ws_error_action != correct_ws_error) { | |
d511bd33 | 2572 | strbuf_add(&newlines, patch + 1, plen); |
8441a9a8 JH |
2573 | } |
2574 | else { | |
d511bd33 | 2575 | ws_fix_copy(&newlines, patch + 1, plen, ws_rule, &applied_after_fixing_ws); |
077e1af5 | 2576 | } |
d511bd33 | 2577 | add_line_info(&postimage, newlines.buf + start, newlines.len - start, |
8441a9a8 | 2578 | (first == '+' ? 0 : LINE_COMMON)); |
8441a9a8 | 2579 | if (first == '+' && |
94ea026b JH |
2580 | (ws_rule & WS_BLANK_AT_EOF) && |
2581 | ws_blank_line(patch + 1, plen, ws_rule)) | |
8441a9a8 | 2582 | added_blank_line = 1; |
3cca928d LT |
2583 | break; |
2584 | case '@': case '\\': | |
2585 | /* Ignore it, we already handled it */ | |
2586 | break; | |
2587 | default: | |
aeabfa07 JS |
2588 | if (apply_verbosely) |
2589 | error("invalid start of line: '%c'", first); | |
3cca928d LT |
2590 | return -1; |
2591 | } | |
85572639 JH |
2592 | if (added_blank_line) { |
2593 | if (!new_blank_lines_at_end) | |
2594 | found_new_blank_lines_at_end = hunk_linenr; | |
077e1af5 | 2595 | new_blank_lines_at_end++; |
85572639 | 2596 | } |
efa57443 JH |
2597 | else if (is_blank_context) |
2598 | ; | |
077e1af5 JH |
2599 | else |
2600 | new_blank_lines_at_end = 0; | |
3cca928d LT |
2601 | patch += len; |
2602 | size -= len; | |
85572639 | 2603 | hunk_linenr++; |
3cca928d | 2604 | } |
81bf96bb | 2605 | if (inaccurate_eof && |
61e08cca | 2606 | old > oldlines && old[-1] == '\n' && |
d511bd33 | 2607 | newlines.len > 0 && newlines.buf[newlines.len - 1] == '\n') { |
61e08cca | 2608 | old--; |
d511bd33 | 2609 | strbuf_setlen(&newlines, newlines.len - 1); |
5b5d4d9e | 2610 | } |
47495887 | 2611 | |
47495887 EB |
2612 | leading = frag->leading; |
2613 | trailing = frag->trailing; | |
1bf1a859 LT |
2614 | |
2615 | /* | |
ee5a317e JH |
2616 | * A hunk to change lines at the beginning would begin with |
2617 | * @@ -1,L +N,M @@ | |
ed0f47a8 JH |
2618 | * but we need to be careful. -U0 that inserts before the second |
2619 | * line also has this pattern. | |
4be60962 | 2620 | * |
ee5a317e JH |
2621 | * And a hunk to add to an empty file would begin with |
2622 | * @@ -0,0 +N,M @@ | |
2623 | * | |
2624 | * In other words, a hunk that is (frag->oldpos <= 1) with or | |
2625 | * without leading context must match at the beginning. | |
1bf1a859 | 2626 | */ |
ed0f47a8 JH |
2627 | match_beginning = (!frag->oldpos || |
2628 | (frag->oldpos == 1 && !unidiff_zero)); | |
ee5a317e JH |
2629 | |
2630 | /* | |
2631 | * A hunk without trailing lines must match at the end. | |
2632 | * However, we simply cannot tell if a hunk must match end | |
2633 | * from the lack of trailing lines if the patch was generated | |
2634 | * with unidiff without any context. | |
2635 | */ | |
2636 | match_end = !unidiff_zero && !trailing; | |
1bf1a859 | 2637 | |
b94f2eda | 2638 | pos = frag->newpos ? (frag->newpos - 1) : 0; |
61e08cca JH |
2639 | preimage.buf = oldlines; |
2640 | preimage.len = old - oldlines; | |
d511bd33 CW |
2641 | postimage.buf = newlines.buf; |
2642 | postimage.len = newlines.len; | |
c330fdd4 JH |
2643 | preimage.line = preimage.line_allocated; |
2644 | postimage.line = postimage.line_allocated; | |
2645 | ||
47495887 | 2646 | for (;;) { |
efe7f358 | 2647 | |
c607aaa2 JH |
2648 | applied_pos = find_pos(img, &preimage, &postimage, pos, |
2649 | ws_rule, match_beginning, match_end); | |
b94f2eda JH |
2650 | |
2651 | if (applied_pos >= 0) | |
47495887 | 2652 | break; |
47495887 EB |
2653 | |
2654 | /* Am I at my context limits? */ | |
2655 | if ((leading <= p_context) && (trailing <= p_context)) | |
2656 | break; | |
65aadb92 JH |
2657 | if (match_beginning || match_end) { |
2658 | match_beginning = match_end = 0; | |
1bf1a859 LT |
2659 | continue; |
2660 | } | |
b94f2eda | 2661 | |
81bf96bb JH |
2662 | /* |
2663 | * Reduce the number of context lines; reduce both | |
2664 | * leading and trailing if they are equal otherwise | |
2665 | * just reduce the larger context. | |
47495887 EB |
2666 | */ |
2667 | if (leading >= trailing) { | |
b94f2eda JH |
2668 | remove_first_line(&preimage); |
2669 | remove_first_line(&postimage); | |
47495887 EB |
2670 | pos--; |
2671 | leading--; | |
2672 | } | |
2673 | if (trailing > leading) { | |
b94f2eda JH |
2674 | remove_last_line(&preimage); |
2675 | remove_last_line(&postimage); | |
47495887 | 2676 | trailing--; |
6e7c92a9 | 2677 | } |
3cca928d LT |
2678 | } |
2679 | ||
b94f2eda | 2680 | if (applied_pos >= 0) { |
77b15bbd | 2681 | if (new_blank_lines_at_end && |
51667147 | 2682 | preimage.nr + applied_pos >= img->nr && |
77b15bbd JH |
2683 | (ws_rule & WS_BLANK_AT_EOF) && |
2684 | ws_error_action != nowarn_ws_error) { | |
85572639 JH |
2685 | record_ws_error(WS_BLANK_AT_EOF, "+", 1, |
2686 | found_new_blank_lines_at_end); | |
77b15bbd JH |
2687 | if (ws_error_action == correct_ws_error) { |
2688 | while (new_blank_lines_at_end--) | |
2689 | remove_last_line(&postimage); | |
2690 | } | |
b94f2eda | 2691 | /* |
77b15bbd JH |
2692 | * We would want to prevent write_out_results() |
2693 | * from taking place in apply_patch() that follows | |
2694 | * the callchain led us here, which is: | |
2695 | * apply_patch->check_patch_list->check_patch-> | |
2696 | * apply_data->apply_fragments->apply_one_fragment | |
b94f2eda | 2697 | */ |
77b15bbd JH |
2698 | if (ws_error_action == die_on_ws_error) |
2699 | apply = 0; | |
b94f2eda | 2700 | } |
aeabfa07 | 2701 | |
334f8cb2 JH |
2702 | if (apply_verbosely && applied_pos != pos) { |
2703 | int offset = applied_pos - pos; | |
2704 | if (apply_in_reverse) | |
2705 | offset = 0 - offset; | |
2706 | fprintf(stderr, | |
2707 | "Hunk #%d succeeded at %d (offset %d lines).\n", | |
2708 | nth_fragment, applied_pos + 1, offset); | |
2709 | } | |
2710 | ||
b94f2eda JH |
2711 | /* |
2712 | * Warn if it was necessary to reduce the number | |
2713 | * of context lines. | |
2714 | */ | |
2715 | if ((leading != frag->leading) || | |
2716 | (trailing != frag->trailing)) | |
2717 | fprintf(stderr, "Context reduced to (%ld/%ld)" | |
2718 | " to apply fragment at %d\n", | |
2719 | leading, trailing, applied_pos+1); | |
2720 | update_image(img, applied_pos, &preimage, &postimage); | |
2721 | } else { | |
2722 | if (apply_verbosely) | |
61e08cca JH |
2723 | error("while searching for:\n%.*s", |
2724 | (int)(old - oldlines), oldlines); | |
b94f2eda | 2725 | } |
aeabfa07 | 2726 | |
61e08cca | 2727 | free(oldlines); |
d511bd33 | 2728 | strbuf_release(&newlines); |
b94f2eda JH |
2729 | free(preimage.line_allocated); |
2730 | free(postimage.line_allocated); | |
2731 | ||
2732 | return (applied_pos < 0); | |
3cca928d LT |
2733 | } |
2734 | ||
b94f2eda | 2735 | static int apply_binary_fragment(struct image *img, struct patch *patch) |
0660626c | 2736 | { |
0660626c | 2737 | struct fragment *fragment = patch->fragments; |
c7f9cb14 PH |
2738 | unsigned long len; |
2739 | void *dst; | |
0660626c | 2740 | |
24305cd7 JK |
2741 | if (!fragment) |
2742 | return error("missing binary patch data for '%s'", | |
2743 | patch->new_name ? | |
2744 | patch->new_name : | |
2745 | patch->old_name); | |
2746 | ||
3cd4f5e8 JH |
2747 | /* Binary patch is irreversible without the optional second hunk */ |
2748 | if (apply_in_reverse) { | |
2749 | if (!fragment->next) | |
2750 | return error("cannot reverse-apply a binary patch " | |
2751 | "without the reverse hunk to '%s'", | |
2752 | patch->new_name | |
2753 | ? patch->new_name : patch->old_name); | |
03eb8f8a | 2754 | fragment = fragment->next; |
3cd4f5e8 | 2755 | } |
3cd4f5e8 | 2756 | switch (fragment->binary_patch_method) { |
0660626c | 2757 | case BINARY_DELTA_DEFLATED: |
b94f2eda | 2758 | dst = patch_delta(img->buf, img->len, fragment->patch, |
c7f9cb14 PH |
2759 | fragment->size, &len); |
2760 | if (!dst) | |
2761 | return -1; | |
b94f2eda JH |
2762 | clear_image(img); |
2763 | img->buf = dst; | |
2764 | img->len = len; | |
c7f9cb14 | 2765 | return 0; |
0660626c | 2766 | case BINARY_LITERAL_DEFLATED: |
b94f2eda JH |
2767 | clear_image(img); |
2768 | img->len = fragment->size; | |
2769 | img->buf = xmalloc(img->len+1); | |
2770 | memcpy(img->buf, fragment->patch, img->len); | |
2771 | img->buf[img->len] = '\0'; | |
c7f9cb14 | 2772 | return 0; |
0660626c | 2773 | } |
c7f9cb14 | 2774 | return -1; |
0660626c JH |
2775 | } |
2776 | ||
b94f2eda | 2777 | static int apply_binary(struct image *img, struct patch *patch) |
3cca928d | 2778 | { |
011f4274 | 2779 | const char *name = patch->old_name ? patch->old_name : patch->new_name; |
051308f6 | 2780 | unsigned char sha1[20]; |
011f4274 | 2781 | |
81bf96bb JH |
2782 | /* |
2783 | * For safety, we require patch index line to contain | |
051308f6 JH |
2784 | * full 40-byte textual SHA1 for old and new, at least for now. |
2785 | */ | |
2786 | if (strlen(patch->old_sha1_prefix) != 40 || | |
2787 | strlen(patch->new_sha1_prefix) != 40 || | |
2788 | get_sha1_hex(patch->old_sha1_prefix, sha1) || | |
2789 | get_sha1_hex(patch->new_sha1_prefix, sha1)) | |
2790 | return error("cannot apply binary patch to '%s' " | |
2791 | "without full index line", name); | |
011f4274 | 2792 | |
051308f6 | 2793 | if (patch->old_name) { |
81bf96bb JH |
2794 | /* |
2795 | * See if the old one matches what the patch | |
051308f6 | 2796 | * applies to. |
011f4274 | 2797 | */ |
b94f2eda | 2798 | hash_sha1_file(img->buf, img->len, blob_type, sha1); |
051308f6 JH |
2799 | if (strcmp(sha1_to_hex(sha1), patch->old_sha1_prefix)) |
2800 | return error("the patch applies to '%s' (%s), " | |
2801 | "which does not match the " | |
2802 | "current contents.", | |
2803 | name, sha1_to_hex(sha1)); | |
2804 | } | |
2805 | else { | |
2806 | /* Otherwise, the old one must be empty. */ | |
b94f2eda | 2807 | if (img->len) |
051308f6 JH |
2808 | return error("the patch applies to an empty " |
2809 | "'%s' but it is not empty", name); | |
2810 | } | |
011f4274 | 2811 | |
0660626c | 2812 | get_sha1_hex(patch->new_sha1_prefix, sha1); |
0bef57ee | 2813 | if (is_null_sha1(sha1)) { |
b94f2eda | 2814 | clear_image(img); |
051308f6 | 2815 | return 0; /* deletion patch */ |
0660626c | 2816 | } |
011f4274 | 2817 | |
051308f6 | 2818 | if (has_sha1_file(sha1)) { |
0660626c | 2819 | /* We already have the postimage */ |
21666f1a | 2820 | enum object_type type; |
051308f6 | 2821 | unsigned long size; |
c7f9cb14 | 2822 | char *result; |
051308f6 | 2823 | |
c7f9cb14 PH |
2824 | result = read_sha1_file(sha1, &type, &size); |
2825 | if (!result) | |
051308f6 JH |
2826 | return error("the necessary postimage %s for " |
2827 | "'%s' cannot be read", | |
2828 | patch->new_sha1_prefix, name); | |
b94f2eda JH |
2829 | clear_image(img); |
2830 | img->buf = result; | |
2831 | img->len = size; | |
c7f9cb14 | 2832 | } else { |
81bf96bb JH |
2833 | /* |
2834 | * We have verified buf matches the preimage; | |
0660626c JH |
2835 | * apply the patch data to it, which is stored |
2836 | * in the patch->fragments->{patch,size}. | |
011f4274 | 2837 | */ |
b94f2eda | 2838 | if (apply_binary_fragment(img, patch)) |
051308f6 JH |
2839 | return error("binary patch does not apply to '%s'", |
2840 | name); | |
011f4274 | 2841 | |
051308f6 | 2842 | /* verify that the result matches */ |
b94f2eda | 2843 | hash_sha1_file(img->buf, img->len, blob_type, sha1); |
051308f6 | 2844 | if (strcmp(sha1_to_hex(sha1), patch->new_sha1_prefix)) |
c7f9cb14 PH |
2845 | return error("binary patch to '%s' creates incorrect result (expecting %s, got %s)", |
2846 | name, patch->new_sha1_prefix, sha1_to_hex(sha1)); | |
011f4274 | 2847 | } |
3cca928d | 2848 | |
051308f6 JH |
2849 | return 0; |
2850 | } | |
2851 | ||
b94f2eda | 2852 | static int apply_fragments(struct image *img, struct patch *patch) |
051308f6 JH |
2853 | { |
2854 | struct fragment *frag = patch->fragments; | |
2855 | const char *name = patch->old_name ? patch->old_name : patch->new_name; | |
cf1b7869 JH |
2856 | unsigned ws_rule = patch->ws_rule; |
2857 | unsigned inaccurate_eof = patch->inaccurate_eof; | |
334f8cb2 | 2858 | int nth = 0; |
051308f6 JH |
2859 | |
2860 | if (patch->is_binary) | |
b94f2eda | 2861 | return apply_binary(img, patch); |
051308f6 | 2862 | |
3cca928d | 2863 | while (frag) { |
334f8cb2 JH |
2864 | nth++; |
2865 | if (apply_one_fragment(img, frag, inaccurate_eof, ws_rule, nth)) { | |
57dc397c JH |
2866 | error("patch failed: %s:%ld", name, frag->oldpos); |
2867 | if (!apply_with_reject) | |
2868 | return -1; | |
2869 | frag->rejected = 1; | |
2870 | } | |
3cca928d LT |
2871 | frag = frag->next; |
2872 | } | |
30996652 | 2873 | return 0; |
3cca928d LT |
2874 | } |
2875 | ||
c7f9cb14 | 2876 | static int read_file_or_gitlink(struct cache_entry *ce, struct strbuf *buf) |
e06c5a6c SV |
2877 | { |
2878 | if (!ce) | |
2879 | return 0; | |
2880 | ||
7a51ed66 | 2881 | if (S_ISGITLINK(ce->ce_mode)) { |
c7f9cb14 PH |
2882 | strbuf_grow(buf, 100); |
2883 | strbuf_addf(buf, "Subproject commit %s\n", sha1_to_hex(ce->sha1)); | |
e06c5a6c SV |
2884 | } else { |
2885 | enum object_type type; | |
c7f9cb14 PH |
2886 | unsigned long sz; |
2887 | char *result; | |
2888 | ||
2889 | result = read_sha1_file(ce->sha1, &type, &sz); | |
2890 | if (!result) | |
e06c5a6c | 2891 | return -1; |
c7f9cb14 PH |
2892 | /* XXX read_sha1_file NUL-terminates */ |
2893 | strbuf_attach(buf, result, sz, sz + 1); | |
e06c5a6c SV |
2894 | } |
2895 | return 0; | |
2896 | } | |
2897 | ||
7a07841c DZ |
2898 | static struct patch *in_fn_table(const char *name) |
2899 | { | |
c455c87c | 2900 | struct string_list_item *item; |
7a07841c DZ |
2901 | |
2902 | if (name == NULL) | |
2903 | return NULL; | |
2904 | ||
e8c8b713 | 2905 | item = string_list_lookup(&fn_table, name); |
7a07841c DZ |
2906 | if (item != NULL) |
2907 | return (struct patch *)item->util; | |
2908 | ||
2909 | return NULL; | |
2910 | } | |
2911 | ||
7fac0eef MK |
2912 | /* |
2913 | * item->util in the filename table records the status of the path. | |
2914 | * Usually it points at a patch (whose result records the contents | |
2915 | * of it after applying it), but it could be PATH_WAS_DELETED for a | |
2916 | * path that a previously applied patch has already removed. | |
2917 | */ | |
2918 | #define PATH_TO_BE_DELETED ((struct patch *) -2) | |
2919 | #define PATH_WAS_DELETED ((struct patch *) -1) | |
2920 | ||
2921 | static int to_be_deleted(struct patch *patch) | |
2922 | { | |
2923 | return patch == PATH_TO_BE_DELETED; | |
2924 | } | |
2925 | ||
2926 | static int was_deleted(struct patch *patch) | |
2927 | { | |
2928 | return patch == PATH_WAS_DELETED; | |
2929 | } | |
2930 | ||
7a07841c DZ |
2931 | static void add_to_fn_table(struct patch *patch) |
2932 | { | |
c455c87c | 2933 | struct string_list_item *item; |
7a07841c DZ |
2934 | |
2935 | /* | |
2936 | * Always add new_name unless patch is a deletion | |
2937 | * This should cover the cases for normal diffs, | |
2938 | * file creations and copies | |
2939 | */ | |
2940 | if (patch->new_name != NULL) { | |
78a395d3 | 2941 | item = string_list_insert(&fn_table, patch->new_name); |
7a07841c DZ |
2942 | item->util = patch; |
2943 | } | |
2944 | ||
2945 | /* | |
2946 | * store a failure on rename/deletion cases because | |
2947 | * later chunks shouldn't patch old names | |
2948 | */ | |
2949 | if ((patch->new_name == NULL) || (patch->is_rename)) { | |
78a395d3 | 2950 | item = string_list_insert(&fn_table, patch->old_name); |
7fac0eef MK |
2951 | item->util = PATH_WAS_DELETED; |
2952 | } | |
2953 | } | |
2954 | ||
2955 | static void prepare_fn_table(struct patch *patch) | |
2956 | { | |
2957 | /* | |
2958 | * store information about incoming file deletion | |
2959 | */ | |
2960 | while (patch) { | |
2961 | if ((patch->new_name == NULL) || (patch->is_rename)) { | |
2962 | struct string_list_item *item; | |
78a395d3 | 2963 | item = string_list_insert(&fn_table, patch->old_name); |
7fac0eef MK |
2964 | item->util = PATH_TO_BE_DELETED; |
2965 | } | |
2966 | patch = patch->next; | |
7a07841c DZ |
2967 | } |
2968 | } | |
2969 | ||
04e4888e | 2970 | static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *ce) |
3cca928d | 2971 | { |
f285a2d7 | 2972 | struct strbuf buf = STRBUF_INIT; |
b94f2eda JH |
2973 | struct image image; |
2974 | size_t len; | |
2975 | char *img; | |
7a07841c | 2976 | struct patch *tpatch; |
3cca928d | 2977 | |
a9a3e82e | 2978 | if (!(patch->is_copy || patch->is_rename) && |
7fac0eef MK |
2979 | (tpatch = in_fn_table(patch->old_name)) != NULL && !to_be_deleted(tpatch)) { |
2980 | if (was_deleted(tpatch)) { | |
7a07841c DZ |
2981 | return error("patch %s has been renamed/deleted", |
2982 | patch->old_name); | |
2983 | } | |
2984 | /* We have a patched copy in memory use that */ | |
2985 | strbuf_add(&buf, tpatch->result, tpatch->resultsize); | |
2986 | } else if (cached) { | |
c7f9cb14 | 2987 | if (read_file_or_gitlink(ce, &buf)) |
e06c5a6c | 2988 | return error("read of %s failed", patch->old_name); |
e06c5a6c SV |
2989 | } else if (patch->old_name) { |
2990 | if (S_ISGITLINK(patch->old_mode)) { | |
c7f9cb14 PH |
2991 | if (ce) { |
2992 | read_file_or_gitlink(ce, &buf); | |
2993 | } else { | |
e06c5a6c SV |
2994 | /* |
2995 | * There is no way to apply subproject | |
2996 | * patch without looking at the index. | |
9d16c2d5 JH |
2997 | * NEEDSWORK: shouldn't this be flagged |
2998 | * as an error??? | |
e06c5a6c | 2999 | */ |
9d16c2d5 | 3000 | free_fragment_list(patch->fragments); |
e06c5a6c | 3001 | patch->fragments = NULL; |
e06c5a6c | 3002 | } |
c7f9cb14 PH |
3003 | } else { |
3004 | if (read_old_data(st, patch->old_name, &buf)) | |
3005 | return error("read of %s failed", patch->old_name); | |
04e4888e JH |
3006 | } |
3007 | } | |
6e7c92a9 | 3008 | |
b94f2eda JH |
3009 | img = strbuf_detach(&buf, &len); |
3010 | prepare_image(&image, img, len, !patch->is_binary); | |
3011 | ||
3012 | if (apply_fragments(&image, patch) < 0) | |
57dc397c | 3013 | return -1; /* note with --reject this succeeds. */ |
b94f2eda JH |
3014 | patch->result = image.buf; |
3015 | patch->resultsize = image.len; | |
7a07841c | 3016 | add_to_fn_table(patch); |
b94f2eda | 3017 | free(image.line_allocated); |
5aa7d94c | 3018 | |
4be60962 | 3019 | if (0 < patch->is_delete && patch->resultsize) |
5aa7d94c LT |
3020 | return error("removal patch leaves file contents"); |
3021 | ||
3cca928d LT |
3022 | return 0; |
3023 | } | |
3024 | ||
64cab591 JH |
3025 | static int check_to_create_blob(const char *new_name, int ok_if_exists) |
3026 | { | |
3027 | struct stat nst; | |
3028 | if (!lstat(new_name, &nst)) { | |
3029 | if (S_ISDIR(nst.st_mode) || ok_if_exists) | |
3030 | return 0; | |
3031 | /* | |
3032 | * A leading component of new_name might be a symlink | |
3033 | * that is going to be removed with this patch, but | |
3034 | * still pointing at somewhere that has the path. | |
3035 | * In such a case, path "new_name" does not exist as | |
3036 | * far as git is concerned. | |
3037 | */ | |
57199892 | 3038 | if (has_symlink_leading_path(new_name, strlen(new_name))) |
64cab591 JH |
3039 | return 0; |
3040 | ||
3041 | return error("%s: already exists in working directory", new_name); | |
3042 | } | |
3043 | else if ((errno != ENOENT) && (errno != ENOTDIR)) | |
3044 | return error("%s: %s", new_name, strerror(errno)); | |
3045 | return 0; | |
3046 | } | |
3047 | ||
e06c5a6c SV |
3048 | static int verify_index_match(struct cache_entry *ce, struct stat *st) |
3049 | { | |
7a51ed66 | 3050 | if (S_ISGITLINK(ce->ce_mode)) { |
e06c5a6c SV |
3051 | if (!S_ISDIR(st->st_mode)) |
3052 | return -1; | |
3053 | return 0; | |
3054 | } | |
56cac48c | 3055 | return ce_match_stat(ce, st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE); |
e06c5a6c SV |
3056 | } |
3057 | ||
5c47f4c6 | 3058 | static int check_preimage(struct patch *patch, struct cache_entry **ce, struct stat *st) |
fab2c257 LT |
3059 | { |
3060 | const char *old_name = patch->old_name; | |
a9a3e82e | 3061 | struct patch *tpatch = NULL; |
5c47f4c6 JH |
3062 | int stat_ret = 0; |
3063 | unsigned st_mode = 0; | |
e06c5a6c SV |
3064 | |
3065 | /* | |
3066 | * Make sure that we do not have local modifications from the | |
3067 | * index when we are looking at the index. Also make sure | |
3068 | * we have the preimage file to be patched in the work tree, | |
3069 | * unless --cached, which tells git to apply only in the index. | |
3070 | */ | |
5c47f4c6 JH |
3071 | if (!old_name) |
3072 | return 0; | |
04e4888e | 3073 | |
5c47f4c6 | 3074 | assert(patch->is_new <= 0); |
a9a3e82e JH |
3075 | |
3076 | if (!(patch->is_copy || patch->is_rename) && | |
7fac0eef MK |
3077 | (tpatch = in_fn_table(old_name)) != NULL && !to_be_deleted(tpatch)) { |
3078 | if (was_deleted(tpatch)) | |
7a07841c | 3079 | return error("%s: has been deleted/renamed", old_name); |
7a07841c DZ |
3080 | st_mode = tpatch->new_mode; |
3081 | } else if (!cached) { | |
5c47f4c6 JH |
3082 | stat_ret = lstat(old_name, st); |
3083 | if (stat_ret && errno != ENOENT) | |
3084 | return error("%s: %s", old_name, strerror(errno)); | |
3085 | } | |
a9a3e82e | 3086 | |
7fac0eef MK |
3087 | if (to_be_deleted(tpatch)) |
3088 | tpatch = NULL; | |
3089 | ||
7a07841c | 3090 | if (check_index && !tpatch) { |
5c47f4c6 JH |
3091 | int pos = cache_name_pos(old_name, strlen(old_name)); |
3092 | if (pos < 0) { | |
3093 | if (patch->is_new < 0) | |
3094 | goto is_new; | |
3095 | return error("%s: does not exist in index", old_name); | |
3096 | } | |
3097 | *ce = active_cache[pos]; | |
3098 | if (stat_ret < 0) { | |
3099 | struct checkout costate; | |
3100 | /* checkout */ | |
54fd955c | 3101 | memset(&costate, 0, sizeof(costate)); |
5c47f4c6 | 3102 | costate.base_dir = ""; |
5c47f4c6 JH |
3103 | costate.refresh_cache = 1; |
3104 | if (checkout_entry(*ce, &costate, NULL) || | |
3105 | lstat(old_name, st)) | |
3106 | return -1; | |
3107 | } | |
3108 | if (!cached && verify_index_match(*ce, st)) | |
3109 | return error("%s: does not match index", old_name); | |
3110 | if (cached) | |
3111 | st_mode = (*ce)->ce_mode; | |
3112 | } else if (stat_ret < 0) { | |
3cca928d | 3113 | if (patch->is_new < 0) |
5c47f4c6 JH |
3114 | goto is_new; |
3115 | return error("%s: %s", old_name, strerror(errno)); | |
fab2c257 | 3116 | } |
a577284a | 3117 | |
e1e43898 | 3118 | if (!cached && !tpatch) |
5c47f4c6 JH |
3119 | st_mode = ce_mode_from_stat(*ce, st->st_mode); |
3120 | ||
3121 | if (patch->is_new < 0) | |
3122 | patch->is_new = 0; | |
3123 | if (!patch->old_mode) | |
3124 | patch->old_mode = st_mode; | |
3125 | if ((st_mode ^ patch->old_mode) & S_IFMT) | |
3126 | return error("%s: wrong type", old_name); | |
3127 | if (st_mode != patch->old_mode) | |
eca2a8f0 | 3128 | warning("%s has type %o, expected %o", |
5c47f4c6 | 3129 | old_name, st_mode, patch->old_mode); |
a15080e5 | 3130 | if (!patch->new_mode && !patch->is_delete) |
1f7903a3 | 3131 | patch->new_mode = st_mode; |
5c47f4c6 JH |
3132 | return 0; |
3133 | ||
3134 | is_new: | |
3135 | patch->is_new = 1; | |
3136 | patch->is_delete = 0; | |
2901bbe5 | 3137 | free(patch->old_name); |
5c47f4c6 JH |
3138 | patch->old_name = NULL; |
3139 | return 0; | |
3140 | } | |
3141 | ||
7a07841c | 3142 | static int check_patch(struct patch *patch) |
5c47f4c6 JH |
3143 | { |
3144 | struct stat st; | |
3145 | const char *old_name = patch->old_name; | |
3146 | const char *new_name = patch->new_name; | |
3147 | const char *name = old_name ? old_name : new_name; | |
3148 | struct cache_entry *ce = NULL; | |
7fac0eef | 3149 | struct patch *tpatch; |
5c47f4c6 JH |
3150 | int ok_if_exists; |
3151 | int status; | |
3152 | ||
3153 | patch->rejected = 1; /* we will drop this after we succeed */ | |
3154 | ||
3155 | status = check_preimage(patch, &ce, &st); | |
3156 | if (status) | |
3157 | return status; | |
3158 | old_name = patch->old_name; | |
3159 | ||
7fac0eef MK |
3160 | if ((tpatch = in_fn_table(new_name)) && |
3161 | (was_deleted(tpatch) || to_be_deleted(tpatch))) | |
81bf96bb JH |
3162 | /* |
3163 | * A type-change diff is always split into a patch to | |
7f95aef2 JH |
3164 | * delete old, immediately followed by a patch to |
3165 | * create new (see diff.c::run_diff()); in such a case | |
3166 | * it is Ok that the entry to be deleted by the | |
3167 | * previous patch is still in the working tree and in | |
3168 | * the index. | |
3169 | */ | |
3170 | ok_if_exists = 1; | |
3171 | else | |
3172 | ok_if_exists = 0; | |
3173 | ||
4be60962 JH |
3174 | if (new_name && |
3175 | ((0 < patch->is_new) | (0 < patch->is_rename) | patch->is_copy)) { | |
7f95aef2 JH |
3176 | if (check_index && |
3177 | cache_name_pos(new_name, strlen(new_name)) >= 0 && | |
3178 | !ok_if_exists) | |
a577284a | 3179 | return error("%s: already exists in index", new_name); |
d91d4c2c | 3180 | if (!cached) { |
64cab591 JH |
3181 | int err = check_to_create_blob(new_name, ok_if_exists); |
3182 | if (err) | |
3183 | return err; | |
d91d4c2c | 3184 | } |
35cc4bcd | 3185 | if (!patch->new_mode) { |
4be60962 | 3186 | if (0 < patch->is_new) |
35cc4bcd JS |
3187 | patch->new_mode = S_IFREG | 0644; |
3188 | else | |
3189 | patch->new_mode = patch->old_mode; | |
3190 | } | |
fab2c257 | 3191 | } |
3cca928d LT |
3192 | |
3193 | if (new_name && old_name) { | |
3194 | int same = !strcmp(old_name, new_name); | |
3195 | if (!patch->new_mode) | |
3196 | patch->new_mode = patch->old_mode; | |
3197 | if ((patch->old_mode ^ patch->new_mode) & S_IFMT) | |
3198 | return error("new mode (%o) of %s does not match old mode (%o)%s%s", | |
3199 | patch->new_mode, new_name, patch->old_mode, | |
3200 | same ? "" : " of ", same ? "" : old_name); | |
04e4888e | 3201 | } |
3cca928d | 3202 | |
04e4888e | 3203 | if (apply_data(patch, &st, ce) < 0) |
011f4274 | 3204 | return error("%s: patch does not apply", name); |
57dc397c | 3205 | patch->rejected = 0; |
a577284a | 3206 | return 0; |
fab2c257 LT |
3207 | } |
3208 | ||
a577284a | 3209 | static int check_patch_list(struct patch *patch) |
19c58fb8 | 3210 | { |
60b7f38e | 3211 | int err = 0; |
a577284a | 3212 | |
7fac0eef | 3213 | prepare_fn_table(patch); |
7a07841c | 3214 | while (patch) { |
a2bf404e JH |
3215 | if (apply_verbosely) |
3216 | say_patch_name(stderr, | |
3217 | "Checking patch ", patch, "...\n"); | |
7a07841c DZ |
3218 | err |= check_patch(patch); |
3219 | patch = patch->next; | |
7f95aef2 | 3220 | } |
60b7f38e | 3221 | return err; |
a577284a LT |
3222 | } |
3223 | ||
ece7b749 JS |
3224 | /* This function tries to read the sha1 from the current index */ |
3225 | static int get_current_sha1(const char *path, unsigned char *sha1) | |
3226 | { | |
3227 | int pos; | |
3228 | ||
3229 | if (read_cache() < 0) | |
3230 | return -1; | |
3231 | pos = cache_name_pos(path, strlen(path)); | |
3232 | if (pos < 0) | |
3233 | return -1; | |
3234 | hashcpy(sha1, active_cache[pos]->sha1); | |
3235 | return 0; | |
3236 | } | |
3237 | ||
7a988699 JS |
3238 | /* Build an index that contains the just the files needed for a 3way merge */ |
3239 | static void build_fake_ancestor(struct patch *list, const char *filename) | |
2cf67f1e JH |
3240 | { |
3241 | struct patch *patch; | |
2af202be | 3242 | struct index_state result = { NULL }; |
7a988699 | 3243 | int fd; |
2cf67f1e JH |
3244 | |
3245 | /* Once we start supporting the reverse patch, it may be | |
3246 | * worth showing the new sha1 prefix, but until then... | |
3247 | */ | |
3248 | for (patch = list; patch; patch = patch->next) { | |
3249 | const unsigned char *sha1_ptr; | |
3250 | unsigned char sha1[20]; | |
7a988699 | 3251 | struct cache_entry *ce; |
2cf67f1e JH |
3252 | const char *name; |
3253 | ||
3254 | name = patch->old_name ? patch->old_name : patch->new_name; | |
4be60962 | 3255 | if (0 < patch->is_new) |
7a988699 | 3256 | continue; |
2cf67f1e | 3257 | else if (get_sha1(patch->old_sha1_prefix, sha1)) |
ece7b749 JS |
3258 | /* git diff has no index line for mode/type changes */ |
3259 | if (!patch->lines_added && !patch->lines_deleted) { | |
18cdf802 | 3260 | if (get_current_sha1(patch->old_name, sha1)) |
ece7b749 JS |
3261 | die("mode change for %s, which is not " |
3262 | "in current HEAD", name); | |
3263 | sha1_ptr = sha1; | |
3264 | } else | |
3265 | die("sha1 information is lacking or useless " | |
3266 | "(%s).", name); | |
2cf67f1e JH |
3267 | else |
3268 | sha1_ptr = sha1; | |
22943f1a | 3269 | |
7a988699 | 3270 | ce = make_cache_entry(patch->old_mode, sha1_ptr, name, 0, 0); |
048f2762 DP |
3271 | if (!ce) |
3272 | die("make_cache_entry failed for path '%s'", name); | |
7a988699 JS |
3273 | if (add_index_entry(&result, ce, ADD_CACHE_OK_TO_ADD)) |
3274 | die ("Could not add %s to temporary index", name); | |
2cf67f1e | 3275 | } |
7a988699 JS |
3276 | |
3277 | fd = open(filename, O_WRONLY | O_CREAT, 0666); | |
3278 | if (fd < 0 || write_index(&result, fd) || close(fd)) | |
3279 | die ("Could not write temporary index to %s", filename); | |
3280 | ||
3281 | discard_index(&result); | |
2cf67f1e JH |
3282 | } |
3283 | ||
a577284a LT |
3284 | static void stat_patch_list(struct patch *patch) |
3285 | { | |
3286 | int files, adds, dels; | |
3287 | ||
3288 | for (files = adds = dels = 0 ; patch ; patch = patch->next) { | |
3289 | files++; | |
3290 | adds += patch->lines_added; | |
3291 | dels += patch->lines_deleted; | |
3292 | show_stats(patch); | |
3293 | } | |
3294 | ||
3295 | printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files, adds, dels); | |
3f40315a LT |
3296 | } |
3297 | ||
7d8b7c21 JH |
3298 | static void numstat_patch_list(struct patch *patch) |
3299 | { | |
3300 | for ( ; patch; patch = patch->next) { | |
3301 | const char *name; | |
49e3343c | 3302 | name = patch->new_name ? patch->new_name : patch->old_name; |
ef58d958 JH |
3303 | if (patch->is_binary) |
3304 | printf("-\t-\t"); | |
3305 | else | |
663af342 PH |
3306 | printf("%d\t%d\t", patch->lines_added, patch->lines_deleted); |
3307 | write_name_quoted(name, stdout, line_termination); | |
7d8b7c21 JH |
3308 | } |
3309 | } | |
3310 | ||
96c912a4 JH |
3311 | static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name) |
3312 | { | |
3313 | if (mode) | |
3314 | printf(" %s mode %06o %s\n", newdelete, mode, name); | |
3315 | else | |
3316 | printf(" %s %s\n", newdelete, name); | |
3317 | } | |
3318 | ||
3319 | static void show_mode_change(struct patch *p, int show_name) | |
3320 | { | |
3321 | if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) { | |
3322 | if (show_name) | |
3323 | printf(" mode change %06o => %06o %s\n", | |
3324 | p->old_mode, p->new_mode, p->new_name); | |
3325 | else | |
3326 | printf(" mode change %06o => %06o\n", | |
3327 | p->old_mode, p->new_mode); | |
3328 | } | |
3329 | } | |
3330 | ||
3331 | static void show_rename_copy(struct patch *p) | |
3332 | { | |
3333 | const char *renamecopy = p->is_rename ? "rename" : "copy"; | |
3334 | const char *old, *new; | |
3335 | ||
3336 | /* Find common prefix */ | |
3337 | old = p->old_name; | |
3338 | new = p->new_name; | |
3339 | while (1) { | |
3340 | const char *slash_old, *slash_new; | |
3341 | slash_old = strchr(old, '/'); | |
3342 | slash_new = strchr(new, '/'); | |
3343 | if (!slash_old || | |
3344 | !slash_new || | |
3345 | slash_old - old != slash_new - new || | |
3346 | memcmp(old, new, slash_new - new)) | |
3347 | break; | |
3348 | old = slash_old + 1; | |
3349 | new = slash_new + 1; | |
3350 | } | |
3351 | /* p->old_name thru old is the common prefix, and old and new | |
3352 | * through the end of names are renames | |
3353 | */ | |
3354 | if (old != p->old_name) | |
3355 | printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy, | |
e30e814d | 3356 | (int)(old - p->old_name), p->old_name, |
96c912a4 JH |
3357 | old, new, p->score); |
3358 | else | |
3359 | printf(" %s %s => %s (%d%%)\n", renamecopy, | |
3360 | p->old_name, p->new_name, p->score); | |
3361 | show_mode_change(p, 0); | |
3362 | } | |
3363 | ||
3364 | static void summary_patch_list(struct patch *patch) | |
3365 | { | |
3366 | struct patch *p; | |
3367 | ||
3368 | for (p = patch; p; p = p->next) { | |
3369 | if (p->is_new) | |
3370 | show_file_mode_name("create", p->new_mode, p->new_name); | |
3371 | else if (p->is_delete) | |
3372 | show_file_mode_name("delete", p->old_mode, p->old_name); | |
3373 | else { | |
3374 | if (p->is_rename || p->is_copy) | |
3375 | show_rename_copy(p); | |
3376 | else { | |
3377 | if (p->score) { | |
3378 | printf(" rewrite %s (%d%%)\n", | |
3379 | p->new_name, p->score); | |
3380 | show_mode_change(p, 0); | |
3381 | } | |
3382 | else | |
3383 | show_mode_change(p, 1); | |
3384 | } | |
3385 | } | |
3386 | } | |
3387 | } | |
3388 | ||
3f40315a LT |
3389 | static void patch_stats(struct patch *patch) |
3390 | { | |
3391 | int lines = patch->lines_added + patch->lines_deleted; | |
3392 | ||
3393 | if (lines > max_change) | |
3394 | max_change = lines; | |
3395 | if (patch->old_name) { | |
22943f1a JH |
3396 | int len = quote_c_style(patch->old_name, NULL, NULL, 0); |
3397 | if (!len) | |
3398 | len = strlen(patch->old_name); | |
3f40315a LT |
3399 | if (len > max_len) |
3400 | max_len = len; | |
3401 | } | |
3402 | if (patch->new_name) { | |
22943f1a JH |
3403 | int len = quote_c_style(patch->new_name, NULL, NULL, 0); |
3404 | if (!len) | |
3405 | len = strlen(patch->new_name); | |
3f40315a LT |
3406 | if (len > max_len) |
3407 | max_len = len; | |
3408 | } | |
19c58fb8 LT |
3409 | } |
3410 | ||
aea19457 | 3411 | static void remove_file(struct patch *patch, int rmdir_empty) |
5aa7d94c | 3412 | { |
7da3bf37 | 3413 | if (update_index) { |
5aa7d94c LT |
3414 | if (remove_file_from_cache(patch->old_name) < 0) |
3415 | die("unable to remove %s from index", patch->old_name); | |
3416 | } | |
d234b21c | 3417 | if (!cached) { |
80d706af | 3418 | if (!remove_or_warn(patch->old_mode, patch->old_name) && rmdir_empty) { |
175a4948 | 3419 | remove_path(patch->old_name); |
d234b21c AJ |
3420 | } |
3421 | } | |
5aa7d94c LT |
3422 | } |
3423 | ||
3424 | static void add_index_file(const char *path, unsigned mode, void *buf, unsigned long size) | |
3425 | { | |
3426 | struct stat st; | |
3427 | struct cache_entry *ce; | |
3428 | int namelen = strlen(path); | |
3429 | unsigned ce_size = cache_entry_size(namelen); | |
3430 | ||
7da3bf37 | 3431 | if (!update_index) |
5aa7d94c LT |
3432 | return; |
3433 | ||
90321c10 | 3434 | ce = xcalloc(1, ce_size); |
5aa7d94c LT |
3435 | memcpy(ce->name, path, namelen); |
3436 | ce->ce_mode = create_ce_mode(mode); | |
7a51ed66 | 3437 | ce->ce_flags = namelen; |
e06c5a6c SV |
3438 | if (S_ISGITLINK(mode)) { |
3439 | const char *s = buf; | |
3440 | ||
3441 | if (get_sha1_hex(s + strlen("Subproject commit "), ce->sha1)) | |
3442 | die("corrupt patch for subproject %s", path); | |
3443 | } else { | |
3444 | if (!cached) { | |
3445 | if (lstat(path, &st) < 0) | |
0721c314 TR |
3446 | die_errno("unable to stat newly created file '%s'", |
3447 | path); | |
e06c5a6c SV |
3448 | fill_stat_cache_info(ce, &st); |
3449 | } | |
3450 | if (write_sha1_file(buf, size, blob_type, ce->sha1) < 0) | |
3451 | die("unable to create backing store for newly created file %s", path); | |
04e4888e | 3452 | } |
5aa7d94c LT |
3453 | if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0) |
3454 | die("unable to add cache entry for %s", path); | |
3455 | } | |
3456 | ||
1b668341 LT |
3457 | static int try_create_file(const char *path, unsigned int mode, const char *buf, unsigned long size) |
3458 | { | |
ac78e548 | 3459 | int fd; |
f285a2d7 | 3460 | struct strbuf nbuf = STRBUF_INIT; |
1b668341 | 3461 | |
e06c5a6c SV |
3462 | if (S_ISGITLINK(mode)) { |
3463 | struct stat st; | |
3464 | if (!lstat(path, &st) && S_ISDIR(st.st_mode)) | |
3465 | return 0; | |
3466 | return mkdir(path, 0777); | |
3467 | } | |
3468 | ||
78a8d641 | 3469 | if (has_symlinks && S_ISLNK(mode)) |
2c71810b JH |
3470 | /* Although buf:size is counted string, it also is NUL |
3471 | * terminated. | |
3472 | */ | |
1b668341 | 3473 | return symlink(buf, path); |
cc96fd09 JH |
3474 | |
3475 | fd = open(path, O_CREAT | O_EXCL | O_WRONLY, (mode & 0100) ? 0777 : 0666); | |
3476 | if (fd < 0) | |
3477 | return -1; | |
3478 | ||
5ecd293d PH |
3479 | if (convert_to_working_tree(path, buf, size, &nbuf)) { |
3480 | size = nbuf.len; | |
3481 | buf = nbuf.buf; | |
1b668341 | 3482 | } |
c7f9cb14 PH |
3483 | write_or_die(fd, buf, size); |
3484 | strbuf_release(&nbuf); | |
ac78e548 | 3485 | |
1b668341 | 3486 | if (close(fd) < 0) |
d824cbba | 3487 | die_errno("closing file '%s'", path); |
1b668341 LT |
3488 | return 0; |
3489 | } | |
3490 | ||
5c8af185 LT |
3491 | /* |
3492 | * We optimistically assume that the directories exist, | |
3493 | * which is true 99% of the time anyway. If they don't, | |
3494 | * we create them and try again. | |
3495 | */ | |
8361e1d4 | 3496 | static void create_one_file(char *path, unsigned mode, const char *buf, unsigned long size) |
5c8af185 | 3497 | { |
04e4888e JH |
3498 | if (cached) |
3499 | return; | |
1b668341 LT |
3500 | if (!try_create_file(path, mode, buf, size)) |
3501 | return; | |
5c8af185 | 3502 | |
1b668341 | 3503 | if (errno == ENOENT) { |
8361e1d4 JR |
3504 | if (safe_create_leading_directories(path)) |
3505 | return; | |
1b668341 LT |
3506 | if (!try_create_file(path, mode, buf, size)) |
3507 | return; | |
5c8af185 | 3508 | } |
5c8af185 | 3509 | |
56ac168f | 3510 | if (errno == EEXIST || errno == EACCES) { |
c28c571c JH |
3511 | /* We may be trying to create a file where a directory |
3512 | * used to be. | |
3513 | */ | |
3514 | struct stat st; | |
0afa7644 | 3515 | if (!lstat(path, &st) && (!S_ISDIR(st.st_mode) || !rmdir(path))) |
c28c571c JH |
3516 | errno = EEXIST; |
3517 | } | |
3518 | ||
1b668341 LT |
3519 | if (errno == EEXIST) { |
3520 | unsigned int nr = getpid(); | |
5c8af185 | 3521 | |
1b668341 | 3522 | for (;;) { |
9fa03c17 AR |
3523 | char newpath[PATH_MAX]; |
3524 | mksnpath(newpath, sizeof(newpath), "%s~%u", path, nr); | |
1b668341 LT |
3525 | if (!try_create_file(newpath, mode, buf, size)) { |
3526 | if (!rename(newpath, path)) | |
3527 | return; | |
691f1a28 | 3528 | unlink_or_warn(newpath); |
1b668341 LT |
3529 | break; |
3530 | } | |
3531 | if (errno != EEXIST) | |
3532 | break; | |
d9e08be9 AR |
3533 | ++nr; |
3534 | } | |
5c8af185 | 3535 | } |
0721c314 | 3536 | die_errno("unable to write file '%s' mode %o", path, mode); |
5c8af185 LT |
3537 | } |
3538 | ||
5aa7d94c LT |
3539 | static void create_file(struct patch *patch) |
3540 | { | |
8361e1d4 | 3541 | char *path = patch->new_name; |
5aa7d94c LT |
3542 | unsigned mode = patch->new_mode; |
3543 | unsigned long size = patch->resultsize; | |
3544 | char *buf = patch->result; | |
3545 | ||
3546 | if (!mode) | |
3547 | mode = S_IFREG | 0644; | |
03ac6e64 | 3548 | create_one_file(path, mode, buf, size); |
1b668341 | 3549 | add_index_file(path, mode, buf, size); |
5aa7d94c LT |
3550 | } |
3551 | ||
eed46644 JH |
3552 | /* phase zero is to remove, phase one is to create */ |
3553 | static void write_out_one_result(struct patch *patch, int phase) | |
5aa7d94c LT |
3554 | { |
3555 | if (patch->is_delete > 0) { | |
eed46644 | 3556 | if (phase == 0) |
aea19457 | 3557 | remove_file(patch, 1); |
5aa7d94c LT |
3558 | return; |
3559 | } | |
3560 | if (patch->is_new > 0 || patch->is_copy) { | |
eed46644 JH |
3561 | if (phase == 1) |
3562 | create_file(patch); | |
5aa7d94c LT |
3563 | return; |
3564 | } | |
3565 | /* | |
3566 | * Rename or modification boils down to the same | |
3567 | * thing: remove the old, write the new | |
3568 | */ | |
eed46644 | 3569 | if (phase == 0) |
93969438 | 3570 | remove_file(patch, patch->is_rename); |
eed46644 | 3571 | if (phase == 1) |
57dc397c | 3572 | create_file(patch); |
5aa7d94c LT |
3573 | } |
3574 | ||
57dc397c JH |
3575 | static int write_out_one_reject(struct patch *patch) |
3576 | { | |
82e2765f JH |
3577 | FILE *rej; |
3578 | char namebuf[PATH_MAX]; | |
57dc397c | 3579 | struct fragment *frag; |
82e2765f | 3580 | int cnt = 0; |
57dc397c | 3581 | |
82e2765f | 3582 | for (cnt = 0, frag = patch->fragments; frag; frag = frag->next) { |
57dc397c JH |
3583 | if (!frag->rejected) |
3584 | continue; | |
82e2765f JH |
3585 | cnt++; |
3586 | } | |
3587 | ||
a2bf404e JH |
3588 | if (!cnt) { |
3589 | if (apply_verbosely) | |
3590 | say_patch_name(stderr, | |
3591 | "Applied patch ", patch, " cleanly.\n"); | |
82e2765f | 3592 | return 0; |
a2bf404e | 3593 | } |
82e2765f JH |
3594 | |
3595 | /* This should not happen, because a removal patch that leaves | |
3596 | * contents are marked "rejected" at the patch level. | |
3597 | */ | |
3598 | if (!patch->new_name) | |
3599 | die("internal error"); | |
3600 | ||
a2bf404e JH |
3601 | /* Say this even without --verbose */ |
3602 | say_patch_name(stderr, "Applying patch ", patch, " with"); | |
3603 | fprintf(stderr, " %d rejects...\n", cnt); | |
3604 | ||
82e2765f JH |
3605 | cnt = strlen(patch->new_name); |
3606 | if (ARRAY_SIZE(namebuf) <= cnt + 5) { | |
3607 | cnt = ARRAY_SIZE(namebuf) - 5; | |
eca2a8f0 | 3608 | warning("truncating .rej filename to %.*s.rej", |
82e2765f JH |
3609 | cnt - 1, patch->new_name); |
3610 | } | |
3611 | memcpy(namebuf, patch->new_name, cnt); | |
3612 | memcpy(namebuf + cnt, ".rej", 5); | |
3613 | ||
3614 | rej = fopen(namebuf, "w"); | |
3615 | if (!rej) | |
3616 | return error("cannot open %s: %s", namebuf, strerror(errno)); | |
3617 | ||
3618 | /* Normal git tools never deal with .rej, so do not pretend | |
3619 | * this is a git patch by saying --git nor give extended | |
3620 | * headers. While at it, maybe please "kompare" that wants | |
3621 | * the trailing TAB and some garbage at the end of line ;-). | |
3622 | */ | |
3623 | fprintf(rej, "diff a/%s b/%s\t(rejected hunks)\n", | |
3624 | patch->new_name, patch->new_name); | |
0e9ee323 | 3625 | for (cnt = 1, frag = patch->fragments; |
82e2765f JH |
3626 | frag; |
3627 | cnt++, frag = frag->next) { | |
3628 | if (!frag->rejected) { | |
3629 | fprintf(stderr, "Hunk #%d applied cleanly.\n", cnt); | |
3630 | continue; | |
57dc397c | 3631 | } |
82e2765f JH |
3632 | fprintf(stderr, "Rejected hunk #%d.\n", cnt); |
3633 | fprintf(rej, "%.*s", frag->size, frag->patch); | |
57dc397c | 3634 | if (frag->patch[frag->size-1] != '\n') |
82e2765f | 3635 | fputc('\n', rej); |
57dc397c | 3636 | } |
82e2765f JH |
3637 | fclose(rej); |
3638 | return -1; | |
5aa7d94c LT |
3639 | } |
3640 | ||
cc64b318 | 3641 | static int write_out_results(struct patch *list) |
5aa7d94c | 3642 | { |
eed46644 | 3643 | int phase; |
57dc397c JH |
3644 | int errs = 0; |
3645 | struct patch *l; | |
eed46644 | 3646 | |
eed46644 | 3647 | for (phase = 0; phase < 2; phase++) { |
57dc397c | 3648 | l = list; |
eed46644 | 3649 | while (l) { |
57dc397c JH |
3650 | if (l->rejected) |
3651 | errs = 1; | |
82e2765f | 3652 | else { |
57dc397c | 3653 | write_out_one_result(l, phase); |
82e2765f | 3654 | if (phase == 1 && write_out_one_reject(l)) |
57dc397c JH |
3655 | errs = 1; |
3656 | } | |
eed46644 JH |
3657 | l = l->next; |
3658 | } | |
5aa7d94c | 3659 | } |
57dc397c | 3660 | return errs; |
5aa7d94c LT |
3661 | } |
3662 | ||
021b6e45 | 3663 | static struct lock_file lock_file; |
5aa7d94c | 3664 | |
6ecb1ee2 JH |
3665 | static struct string_list limit_by_name; |
3666 | static int has_include; | |
3667 | static void add_name_limit(const char *name, int exclude) | |
3668 | { | |
3669 | struct string_list_item *it; | |
3670 | ||
1d2f80fa | 3671 | it = string_list_append(&limit_by_name, name); |
6ecb1ee2 JH |
3672 | it->util = exclude ? NULL : (void *) 1; |
3673 | } | |
d854f783 JH |
3674 | |
3675 | static int use_patch(struct patch *p) | |
3676 | { | |
c7c81b3a | 3677 | const char *pathname = p->new_name ? p->new_name : p->old_name; |
6ecb1ee2 JH |
3678 | int i; |
3679 | ||
3680 | /* Paths outside are not touched regardless of "--include" */ | |
edf2e370 JH |
3681 | if (0 < prefix_length) { |
3682 | int pathlen = strlen(pathname); | |
3683 | if (pathlen <= prefix_length || | |
3684 | memcmp(prefix, pathname, prefix_length)) | |
3685 | return 0; | |
3686 | } | |
6ecb1ee2 JH |
3687 | |
3688 | /* See if it matches any of exclude/include rule */ | |
3689 | for (i = 0; i < limit_by_name.nr; i++) { | |
3690 | struct string_list_item *it = &limit_by_name.items[i]; | |
3691 | if (!fnmatch(it->string, pathname, 0)) | |
3692 | return (it->util != NULL); | |
3693 | } | |
3694 | ||
3695 | /* | |
3696 | * If we had any include, a path that does not match any rule is | |
3697 | * not used. Otherwise, we saw bunch of exclude rules (or none) | |
3698 | * and such a path is used. | |
3699 | */ | |
3700 | return !has_include; | |
d854f783 JH |
3701 | } |
3702 | ||
6ecb1ee2 | 3703 | |
eac70c4f | 3704 | static void prefix_one(char **name) |
56185f49 | 3705 | { |
eac70c4f JS |
3706 | char *old_name = *name; |
3707 | if (!old_name) | |
3708 | return; | |
3709 | *name = xstrdup(prefix_filename(prefix, prefix_length, *name)); | |
3710 | free(old_name); | |
56185f49 JH |
3711 | } |
3712 | ||
3713 | static void prefix_patches(struct patch *p) | |
3714 | { | |
9987d7c5 | 3715 | if (!prefix || p->is_toplevel_relative) |
56185f49 JH |
3716 | return; |
3717 | for ( ; p; p = p->next) { | |
2901bbe5 JH |
3718 | prefix_one(&p->new_name); |
3719 | prefix_one(&p->old_name); | |
56185f49 JH |
3720 | } |
3721 | } | |
3722 | ||
c14b9d1e JS |
3723 | #define INACCURATE_EOF (1<<0) |
3724 | #define RECOUNT (1<<1) | |
3725 | ||
3726 | static int apply_patch(int fd, const char *filename, int options) | |
c1bb9350 | 3727 | { |
9a76adeb | 3728 | size_t offset; |
f285a2d7 | 3729 | struct strbuf buf = STRBUF_INIT; |
19c58fb8 | 3730 | struct patch *list = NULL, **listp = &list; |
d854f783 | 3731 | int skipped_patch = 0; |
c1bb9350 | 3732 | |
b5767dd6 | 3733 | patch_input_file = filename; |
9a76adeb | 3734 | read_patch_file(&buf, fd); |
c1bb9350 | 3735 | offset = 0; |
9a76adeb | 3736 | while (offset < buf.len) { |
19c58fb8 LT |
3737 | struct patch *patch; |
3738 | int nr; | |
3739 | ||
90321c10 | 3740 | patch = xcalloc(1, sizeof(*patch)); |
c14b9d1e JS |
3741 | patch->inaccurate_eof = !!(options & INACCURATE_EOF); |
3742 | patch->recount = !!(options & RECOUNT); | |
f94bf440 | 3743 | nr = parse_chunk(buf.buf + offset, buf.len - offset, patch); |
c1bb9350 LT |
3744 | if (nr < 0) |
3745 | break; | |
f686d030 | 3746 | if (apply_in_reverse) |
e5a94313 | 3747 | reverse_patches(patch); |
56185f49 JH |
3748 | if (prefix) |
3749 | prefix_patches(patch); | |
d854f783 JH |
3750 | if (use_patch(patch)) { |
3751 | patch_stats(patch); | |
3752 | *listp = patch; | |
3753 | listp = &patch->next; | |
56185f49 JH |
3754 | } |
3755 | else { | |
6fe53908 | 3756 | free_patch(patch); |
d854f783 JH |
3757 | skipped_patch++; |
3758 | } | |
c1bb9350 | 3759 | offset += nr; |
c1bb9350 | 3760 | } |
19c58fb8 | 3761 | |
cc64b318 BC |
3762 | if (!list && !skipped_patch) |
3763 | die("unrecognized input"); | |
3764 | ||
81bf96bb | 3765 | if (whitespace_error && (ws_error_action == die_on_ws_error)) |
b5767dd6 JH |
3766 | apply = 0; |
3767 | ||
7da3bf37 JH |
3768 | update_index = check_index && apply; |
3769 | if (update_index && newfd < 0) | |
30ca07a2 JH |
3770 | newfd = hold_locked_index(&lock_file, 1); |
3771 | ||
5aa7d94c LT |
3772 | if (check_index) { |
3773 | if (read_cache() < 0) | |
3774 | die("unable to read index file"); | |
3775 | } | |
3776 | ||
57dc397c JH |
3777 | if ((check || apply) && |
3778 | check_patch_list(list) < 0 && | |
3779 | !apply_with_reject) | |
a577284a LT |
3780 | exit(1); |
3781 | ||
cc64b318 | 3782 | if (apply && write_out_results(list)) |
57dc397c | 3783 | exit(1); |
5aa7d94c | 3784 | |
7a988699 JS |
3785 | if (fake_ancestor) |
3786 | build_fake_ancestor(list, fake_ancestor); | |
2cf67f1e | 3787 | |
a577284a LT |
3788 | if (diffstat) |
3789 | stat_patch_list(list); | |
19c58fb8 | 3790 | |
7d8b7c21 JH |
3791 | if (numstat) |
3792 | numstat_patch_list(list); | |
3793 | ||
96c912a4 JH |
3794 | if (summary) |
3795 | summary_patch_list(list); | |
3796 | ||
a604ddef | 3797 | free_patch_list(list); |
9a76adeb | 3798 | strbuf_release(&buf); |
5c877433 | 3799 | string_list_clear(&fn_table, 0); |
c1bb9350 LT |
3800 | return 0; |
3801 | } | |
3802 | ||
ef90d6d4 | 3803 | static int git_apply_config(const char *var, const char *value, void *cb) |
2ae1c53b | 3804 | { |
8e4c6aa1 SB |
3805 | if (!strcmp(var, "apply.whitespace")) |
3806 | return git_config_string(&apply_default_whitespace, var, value); | |
86c91f91 GB |
3807 | else if (!strcmp(var, "apply.ignorewhitespace")) |
3808 | return git_config_string(&apply_default_ignorewhitespace, var, value); | |
ef90d6d4 | 3809 | return git_default_config(var, value, cb); |
2ae1c53b JH |
3810 | } |
3811 | ||
f26c4940 MV |
3812 | static int option_parse_exclude(const struct option *opt, |
3813 | const char *arg, int unset) | |
3814 | { | |
3815 | add_name_limit(arg, 1); | |
3816 | return 0; | |
3817 | } | |
3818 | ||
3819 | static int option_parse_include(const struct option *opt, | |
3820 | const char *arg, int unset) | |
3821 | { | |
3822 | add_name_limit(arg, 0); | |
3823 | has_include = 1; | |
3824 | return 0; | |
3825 | } | |
3826 | ||
3827 | static int option_parse_p(const struct option *opt, | |
3828 | const char *arg, int unset) | |
3829 | { | |
3830 | p_value = atoi(arg); | |
3831 | p_value_known = 1; | |
3832 | return 0; | |
3833 | } | |
3834 | ||
3835 | static int option_parse_z(const struct option *opt, | |
3836 | const char *arg, int unset) | |
3837 | { | |
3838 | if (unset) | |
3839 | line_termination = '\n'; | |
3840 | else | |
3841 | line_termination = 0; | |
3842 | return 0; | |
3843 | } | |
3844 | ||
86c91f91 GB |
3845 | static int option_parse_space_change(const struct option *opt, |
3846 | const char *arg, int unset) | |
3847 | { | |
3848 | if (unset) | |
3849 | ws_ignore_action = ignore_ws_none; | |
3850 | else | |
3851 | ws_ignore_action = ignore_ws_change; | |
3852 | return 0; | |
3853 | } | |
3854 | ||
f26c4940 MV |
3855 | static int option_parse_whitespace(const struct option *opt, |
3856 | const char *arg, int unset) | |
3857 | { | |
3858 | const char **whitespace_option = opt->value; | |
3859 | ||
3860 | *whitespace_option = arg; | |
3861 | parse_whitespace_option(arg); | |
3862 | return 0; | |
3863 | } | |
3864 | ||
3865 | static int option_parse_directory(const struct option *opt, | |
3866 | const char *arg, int unset) | |
3867 | { | |
3868 | root_len = strlen(arg); | |
3869 | if (root_len && arg[root_len - 1] != '/') { | |
3870 | char *new_root; | |
3871 | root = new_root = xmalloc(root_len + 2); | |
3872 | strcpy(new_root, arg); | |
3873 | strcpy(new_root + root_len++, "/"); | |
3874 | } else | |
3875 | root = arg; | |
3876 | return 0; | |
3877 | } | |
2ae1c53b | 3878 | |
d1ea8962 | 3879 | int cmd_apply(int argc, const char **argv, const char *prefix_) |
c1bb9350 LT |
3880 | { |
3881 | int i; | |
57dc397c | 3882 | int errs = 0; |
d1ea8962 | 3883 | int is_not_gitdir = !startup_info->have_repository; |
f26c4940 | 3884 | int force_apply = 0; |
3eaa38da | 3885 | |
2ae1c53b | 3886 | const char *whitespace_option = NULL; |
c1bb9350 | 3887 | |
f26c4940 | 3888 | struct option builtin_apply_options[] = { |
f26c4940 | 3889 | { OPTION_CALLBACK, 0, "exclude", NULL, "path", |
40bac151 | 3890 | "don't apply changes matching the given path", |
f26c4940 MV |
3891 | 0, option_parse_exclude }, |
3892 | { OPTION_CALLBACK, 0, "include", NULL, "path", | |
3893 | "apply changes matching the given path", | |
3894 | 0, option_parse_include }, | |
3895 | { OPTION_CALLBACK, 'p', NULL, NULL, "num", | |
3896 | "remove <num> leading slashes from traditional diff paths", | |
3897 | 0, option_parse_p }, | |
3898 | OPT_BOOLEAN(0, "no-add", &no_add, | |
3899 | "ignore additions made by the patch"), | |
3900 | OPT_BOOLEAN(0, "stat", &diffstat, | |
3901 | "instead of applying the patch, output diffstat for the input"), | |
af1032ed RS |
3902 | OPT_NOOP_NOARG(0, "allow-binary-replacement"), |
3903 | OPT_NOOP_NOARG(0, "binary"), | |
f26c4940 MV |
3904 | OPT_BOOLEAN(0, "numstat", &numstat, |
3905 | "shows number of added and deleted lines in decimal notation"), | |
3906 | OPT_BOOLEAN(0, "summary", &summary, | |
3907 | "instead of applying the patch, output a summary for the input"), | |
3908 | OPT_BOOLEAN(0, "check", &check, | |
3909 | "instead of applying the patch, see if the patch is applicable"), | |
3910 | OPT_BOOLEAN(0, "index", &check_index, | |
3911 | "make sure the patch is applicable to the current index"), | |
3912 | OPT_BOOLEAN(0, "cached", &cached, | |
3913 | "apply a patch without touching the working tree"), | |
3914 | OPT_BOOLEAN(0, "apply", &force_apply, | |
3915 | "also apply the patch (use with --stat/--summary/--check)"), | |
df217ed6 | 3916 | OPT_FILENAME(0, "build-fake-ancestor", &fake_ancestor, |
f26c4940 MV |
3917 | "build a temporary index based on embedded index information"), |
3918 | { OPTION_CALLBACK, 'z', NULL, NULL, NULL, | |
3919 | "paths are separated with NUL character", | |
3920 | PARSE_OPT_NOARG, option_parse_z }, | |
3921 | OPT_INTEGER('C', NULL, &p_context, | |
3922 | "ensure at least <n> lines of context match"), | |
3923 | { OPTION_CALLBACK, 0, "whitespace", &whitespace_option, "action", | |
3924 | "detect new or modified lines that have whitespace errors", | |
3925 | 0, option_parse_whitespace }, | |
86c91f91 GB |
3926 | { OPTION_CALLBACK, 0, "ignore-space-change", NULL, NULL, |
3927 | "ignore changes in whitespace when finding context", | |
3928 | PARSE_OPT_NOARG, option_parse_space_change }, | |
3929 | { OPTION_CALLBACK, 0, "ignore-whitespace", NULL, NULL, | |
3930 | "ignore changes in whitespace when finding context", | |
3931 | PARSE_OPT_NOARG, option_parse_space_change }, | |
f26c4940 MV |
3932 | OPT_BOOLEAN('R', "reverse", &apply_in_reverse, |
3933 | "apply the patch in reverse"), | |
3934 | OPT_BOOLEAN(0, "unidiff-zero", &unidiff_zero, | |
3935 | "don't expect at least one line of context"), | |
3936 | OPT_BOOLEAN(0, "reject", &apply_with_reject, | |
3937 | "leave the rejected hunks in corresponding *.rej files"), | |
933e44d3 JH |
3938 | OPT_BOOLEAN(0, "allow-overlap", &allow_overlap, |
3939 | "allow overlapping hunks"), | |
fd03881a | 3940 | OPT__VERBOSE(&apply_verbosely, "be verbose"), |
f26c4940 MV |
3941 | OPT_BIT(0, "inaccurate-eof", &options, |
3942 | "tolerate incorrectly detected missing new-line at the end of file", | |
3943 | INACCURATE_EOF), | |
3944 | OPT_BIT(0, "recount", &options, | |
3945 | "do not trust the line counts in the hunk headers", | |
3946 | RECOUNT), | |
3947 | { OPTION_CALLBACK, 0, "directory", NULL, "root", | |
3948 | "prepend <root> to all filenames", | |
3949 | 0, option_parse_directory }, | |
3950 | OPT_END() | |
3951 | }; | |
3952 | ||
d1ea8962 | 3953 | prefix = prefix_; |
dc7b2436 | 3954 | prefix_length = prefix ? strlen(prefix) : 0; |
ef90d6d4 | 3955 | git_config(git_apply_config, NULL); |
700ea479 JH |
3956 | if (apply_default_whitespace) |
3957 | parse_whitespace_option(apply_default_whitespace); | |
86c91f91 GB |
3958 | if (apply_default_ignorewhitespace) |
3959 | parse_ignorewhitespace_option(apply_default_ignorewhitespace); | |
67160271 | 3960 | |
37782920 | 3961 | argc = parse_options(argc, argv, prefix, builtin_apply_options, |
f26c4940 | 3962 | apply_usage, 0); |
4c8d4c14 | 3963 | |
f26c4940 MV |
3964 | if (apply_with_reject) |
3965 | apply = apply_verbosely = 1; | |
3966 | if (!force_apply && (diffstat || numstat || summary || check || fake_ancestor)) | |
3967 | apply = 0; | |
3968 | if (check_index && is_not_gitdir) | |
3969 | die("--index outside a repository"); | |
3970 | if (cached) { | |
3971 | if (is_not_gitdir) | |
3972 | die("--cached outside a repository"); | |
3973 | check_index = 1; | |
3974 | } | |
3975 | for (i = 0; i < argc; i++) { | |
c1bb9350 LT |
3976 | const char *arg = argv[i]; |
3977 | int fd; | |
3978 | ||
3979 | if (!strcmp(arg, "-")) { | |
c14b9d1e | 3980 | errs |= apply_patch(0, "<stdin>", options); |
4dfdbe10 | 3981 | read_stdin = 0; |
c1bb9350 | 3982 | continue; |
64912a67 | 3983 | } else if (0 < prefix_length) |
edf2e370 JH |
3984 | arg = prefix_filename(prefix, prefix_length, arg); |
3985 | ||
c1bb9350 LT |
3986 | fd = open(arg, O_RDONLY); |
3987 | if (fd < 0) | |
d824cbba | 3988 | die_errno("can't open patch '%s'", arg); |
4dfdbe10 | 3989 | read_stdin = 0; |
f21d6726 | 3990 | set_default_whitespace_mode(whitespace_option); |
c14b9d1e | 3991 | errs |= apply_patch(fd, arg, options); |
c1bb9350 LT |
3992 | close(fd); |
3993 | } | |
f21d6726 | 3994 | set_default_whitespace_mode(whitespace_option); |
4dfdbe10 | 3995 | if (read_stdin) |
c14b9d1e | 3996 | errs |= apply_patch(0, "<stdin>", options); |
fc96b7c9 JH |
3997 | if (whitespace_error) { |
3998 | if (squelch_whitespace_errors && | |
3999 | squelch_whitespace_errors < whitespace_error) { | |
4000 | int squelched = | |
4001 | whitespace_error - squelch_whitespace_errors; | |
eca2a8f0 MV |
4002 | warning("squelched %d " |
4003 | "whitespace error%s", | |
fc96b7c9 JH |
4004 | squelched, |
4005 | squelched == 1 ? "" : "s"); | |
4006 | } | |
81bf96bb | 4007 | if (ws_error_action == die_on_ws_error) |
c94bf41c | 4008 | die("%d line%s add%s whitespace errors.", |
fc96b7c9 JH |
4009 | whitespace_error, |
4010 | whitespace_error == 1 ? "" : "s", | |
4011 | whitespace_error == 1 ? "s" : ""); | |
d8c37945 | 4012 | if (applied_after_fixing_ws && apply) |
eca2a8f0 MV |
4013 | warning("%d line%s applied after" |
4014 | " fixing whitespace errors.", | |
c94bf41c JH |
4015 | applied_after_fixing_ws, |
4016 | applied_after_fixing_ws == 1 ? "" : "s"); | |
fc96b7c9 | 4017 | else if (whitespace_error) |
eca2a8f0 | 4018 | warning("%d line%s add%s whitespace errors.", |
fc96b7c9 JH |
4019 | whitespace_error, |
4020 | whitespace_error == 1 ? "" : "s", | |
4021 | whitespace_error == 1 ? "s" : ""); | |
4022 | } | |
dbd0f7d3 | 4023 | |
7da3bf37 | 4024 | if (update_index) { |
dbd0f7d3 | 4025 | if (write_cache(newfd, active_cache, active_nr) || |
4ed7cd3a | 4026 | commit_locked_index(&lock_file)) |
021b6e45 | 4027 | die("Unable to write new index file"); |
dbd0f7d3 EW |
4028 | } |
4029 | ||
57dc397c | 4030 | return !!errs; |
c1bb9350 | 4031 | } |