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Commit | Line | Data |
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be3cfa85 JH |
1 | /* |
2 | * Copyright (C) 2005 Junio C Hamano | |
3 | */ | |
4 | #include <sys/types.h> | |
5 | #include <sys/wait.h> | |
532149d7 | 6 | #include <signal.h> |
86436c28 | 7 | #include "cache.h" |
6fb737be | 8 | #include "quote.h" |
86436c28 | 9 | #include "diff.h" |
427dcb4b | 10 | #include "diffcore.h" |
86436c28 | 11 | |
d19938ab | 12 | static const char *diff_opts = "-pu"; |
427dcb4b | 13 | |
f0c6b2a2 | 14 | static int use_size_cache; |
86436c28 | 15 | |
3299c6f6 JH |
16 | int diff_rename_limit_default = -1; |
17 | ||
9ce392f4 JH |
18 | int git_diff_config(const char *var, const char *value) |
19 | { | |
20 | if (!strcmp(var, "diff.renamelimit")) { | |
21 | diff_rename_limit_default = git_config_int(var, value); | |
22 | return 0; | |
23 | } | |
24 | ||
25 | return git_default_config(var, value); | |
26 | } | |
27 | ||
cf9dfc66 JH |
28 | static char *quote_one(const char *str) |
29 | { | |
30 | int needlen; | |
31 | char *xp; | |
32 | ||
33 | if (!str) | |
34 | return NULL; | |
35 | needlen = quote_c_style(str, NULL, NULL, 0); | |
36 | if (!needlen) | |
37 | return strdup(str); | |
38 | xp = xmalloc(needlen + 1); | |
39 | quote_c_style(str, xp, NULL, 0); | |
40 | return xp; | |
41 | } | |
42 | ||
43 | static char *quote_two(const char *one, const char *two) | |
44 | { | |
45 | int need_one = quote_c_style(one, NULL, NULL, 1); | |
46 | int need_two = quote_c_style(two, NULL, NULL, 1); | |
47 | char *xp; | |
48 | ||
49 | if (need_one + need_two) { | |
50 | if (!need_one) need_one = strlen(one); | |
51 | if (!need_two) need_one = strlen(two); | |
52 | ||
53 | xp = xmalloc(need_one + need_two + 3); | |
54 | xp[0] = '"'; | |
55 | quote_c_style(one, xp + 1, NULL, 1); | |
56 | quote_c_style(two, xp + need_one + 1, NULL, 1); | |
57 | strcpy(xp + need_one + need_two + 1, "\""); | |
58 | return xp; | |
59 | } | |
60 | need_one = strlen(one); | |
61 | need_two = strlen(two); | |
62 | xp = xmalloc(need_one + need_two + 1); | |
63 | strcpy(xp, one); | |
64 | strcpy(xp + need_one, two); | |
65 | return xp; | |
66 | } | |
67 | ||
be3cfa85 | 68 | static const char *external_diff(void) |
86436c28 | 69 | { |
d19938ab | 70 | static const char *external_diff_cmd = NULL; |
be3cfa85 | 71 | static int done_preparing = 0; |
c7c81b3a | 72 | const char *env_diff_opts; |
be3cfa85 JH |
73 | |
74 | if (done_preparing) | |
75 | return external_diff_cmd; | |
76 | ||
86436c28 JH |
77 | /* |
78 | * Default values above are meant to match the | |
79 | * Linux kernel development style. Examples of | |
80 | * alternative styles you can specify via environment | |
81 | * variables are: | |
82 | * | |
86436c28 JH |
83 | * GIT_DIFF_OPTS="-c"; |
84 | */ | |
a9ab586a | 85 | external_diff_cmd = getenv("GIT_EXTERNAL_DIFF"); |
be3cfa85 JH |
86 | |
87 | /* In case external diff fails... */ | |
a9ab586a | 88 | env_diff_opts = getenv("GIT_DIFF_OPTS"); |
c7c81b3a | 89 | if (env_diff_opts) diff_opts = env_diff_opts; |
be3cfa85 JH |
90 | |
91 | done_preparing = 1; | |
92 | return external_diff_cmd; | |
86436c28 JH |
93 | } |
94 | ||
64f8a631 HE |
95 | #define TEMPFILE_PATH_LEN 50 |
96 | ||
be3cfa85 | 97 | static struct diff_tempfile { |
427dcb4b | 98 | const char *name; /* filename external diff should read from */ |
be3cfa85 JH |
99 | char hex[41]; |
100 | char mode[10]; | |
64f8a631 | 101 | char tmp_path[TEMPFILE_PATH_LEN]; |
be3cfa85 JH |
102 | } diff_temp[2]; |
103 | ||
366175ef JH |
104 | static int count_lines(const char *filename) |
105 | { | |
106 | FILE *in; | |
107 | int count, ch, completely_empty = 1, nl_just_seen = 0; | |
108 | in = fopen(filename, "r"); | |
109 | count = 0; | |
110 | while ((ch = fgetc(in)) != EOF) | |
111 | if (ch == '\n') { | |
112 | count++; | |
113 | nl_just_seen = 1; | |
114 | completely_empty = 0; | |
115 | } | |
116 | else { | |
117 | nl_just_seen = 0; | |
118 | completely_empty = 0; | |
119 | } | |
120 | fclose(in); | |
121 | if (completely_empty) | |
122 | return 0; | |
123 | if (!nl_just_seen) | |
124 | count++; /* no trailing newline */ | |
125 | return count; | |
126 | } | |
127 | ||
128 | static void print_line_count(int count) | |
129 | { | |
130 | switch (count) { | |
131 | case 0: | |
132 | printf("0,0"); | |
133 | break; | |
134 | case 1: | |
135 | printf("1"); | |
136 | break; | |
137 | default: | |
138 | printf("1,%d", count); | |
139 | break; | |
140 | } | |
141 | } | |
142 | ||
143 | static void copy_file(int prefix, const char *filename) | |
144 | { | |
145 | FILE *in; | |
146 | int ch, nl_just_seen = 1; | |
147 | in = fopen(filename, "r"); | |
148 | while ((ch = fgetc(in)) != EOF) { | |
149 | if (nl_just_seen) | |
150 | putchar(prefix); | |
151 | putchar(ch); | |
152 | if (ch == '\n') | |
153 | nl_just_seen = 1; | |
154 | else | |
155 | nl_just_seen = 0; | |
156 | } | |
157 | fclose(in); | |
158 | if (!nl_just_seen) | |
159 | printf("\n\\ No newline at end of file\n"); | |
160 | } | |
161 | ||
162 | static void emit_rewrite_diff(const char *name_a, | |
163 | const char *name_b, | |
164 | struct diff_tempfile *temp) | |
165 | { | |
166 | /* Use temp[i].name as input, name_a and name_b as labels */ | |
167 | int lc_a, lc_b; | |
168 | lc_a = count_lines(temp[0].name); | |
169 | lc_b = count_lines(temp[1].name); | |
170 | printf("--- %s\n+++ %s\n@@ -", name_a, name_b); | |
171 | print_line_count(lc_a); | |
172 | printf(" +"); | |
173 | print_line_count(lc_b); | |
174 | printf(" @@\n"); | |
175 | if (lc_a) | |
176 | copy_file('-', temp[0].name); | |
177 | if (lc_b) | |
178 | copy_file('+', temp[1].name); | |
179 | } | |
180 | ||
8676eb43 | 181 | static const char *builtin_diff(const char *name_a, |
915838c3 | 182 | const char *name_b, |
57fe64a4 | 183 | struct diff_tempfile *temp, |
366175ef | 184 | const char *xfrm_msg, |
8676eb43 LT |
185 | int complete_rewrite, |
186 | const char **args) | |
86436c28 | 187 | { |
9669e17a | 188 | int i, next_at, cmd_size; |
cf9dfc66 | 189 | const char *const diff_cmd = "diff -L%s -L%s"; |
694a764f | 190 | const char *const diff_arg = "-- %s %s||:"; /* "||:" is to return 0 */ |
2f978138 | 191 | const char *input_name_sq[2]; |
cf9dfc66 | 192 | const char *label_path[2]; |
2f978138 | 193 | char *cmd; |
915838c3 | 194 | |
cf9dfc66 JH |
195 | /* diff_cmd and diff_arg have 4 %s in total which makes |
196 | * the sum of these strings 8 bytes larger than required. | |
be3cfa85 | 197 | * we use 2 spaces around diff-opts, and we need to count |
cf9dfc66 JH |
198 | * terminating NUL; we used to subtract 5 here, but we do not |
199 | * care about small leaks in this subprocess that is about | |
200 | * to exec "diff" anymore. | |
be3cfa85 | 201 | */ |
cf9dfc66 JH |
202 | cmd_size = (strlen(diff_cmd) + strlen(diff_opts) + strlen(diff_arg) |
203 | + 128); | |
204 | ||
2f978138 | 205 | for (i = 0; i < 2; i++) { |
6fb737be | 206 | input_name_sq[i] = sq_quote(temp[i].name); |
cf9dfc66 JH |
207 | if (!strcmp(temp[i].name, "/dev/null")) |
208 | label_path[i] = "/dev/null"; | |
209 | else if (!i) | |
210 | label_path[i] = sq_quote(quote_two("a/", name_a)); | |
211 | else | |
212 | label_path[i] = sq_quote(quote_two("b/", name_b)); | |
213 | cmd_size += (strlen(label_path[i]) + strlen(input_name_sq[i])); | |
2f978138 | 214 | } |
be3cfa85 | 215 | |
2f978138 JH |
216 | cmd = xmalloc(cmd_size); |
217 | ||
218 | next_at = 0; | |
be3cfa85 | 219 | next_at += snprintf(cmd+next_at, cmd_size-next_at, |
cf9dfc66 | 220 | diff_cmd, label_path[0], label_path[1]); |
be3cfa85 JH |
221 | next_at += snprintf(cmd+next_at, cmd_size-next_at, |
222 | " %s ", diff_opts); | |
223 | next_at += snprintf(cmd+next_at, cmd_size-next_at, | |
2f978138 JH |
224 | diff_arg, input_name_sq[0], input_name_sq[1]); |
225 | ||
cf9dfc66 JH |
226 | printf("diff --git %s %s\n", |
227 | quote_two("a/", name_a), quote_two("b/", name_b)); | |
228 | if (label_path[0][0] == '/') { | |
229 | /* dev/null */ | |
b58f23b3 | 230 | printf("new file mode %s\n", temp[1].mode); |
70aadac0 JH |
231 | if (xfrm_msg && xfrm_msg[0]) |
232 | puts(xfrm_msg); | |
233 | } | |
cf9dfc66 | 234 | else if (label_path[1][0] == '/') { |
b58f23b3 | 235 | printf("deleted file mode %s\n", temp[0].mode); |
70aadac0 JH |
236 | if (xfrm_msg && xfrm_msg[0]) |
237 | puts(xfrm_msg); | |
238 | } | |
273b9834 | 239 | else { |
b58f23b3 JH |
240 | if (strcmp(temp[0].mode, temp[1].mode)) { |
241 | printf("old mode %s\n", temp[0].mode); | |
242 | printf("new mode %s\n", temp[1].mode); | |
243 | } | |
427dcb4b | 244 | if (xfrm_msg && xfrm_msg[0]) |
09d9d1a6 | 245 | puts(xfrm_msg); |
8676eb43 LT |
246 | /* |
247 | * we do not run diff between different kind | |
248 | * of objects. | |
249 | */ | |
273b9834 | 250 | if (strncmp(temp[0].mode, temp[1].mode, 3)) |
8676eb43 | 251 | return NULL; |
366175ef | 252 | if (complete_rewrite) { |
366175ef | 253 | emit_rewrite_diff(name_a, name_b, temp); |
8676eb43 | 254 | return NULL; |
366175ef | 255 | } |
b28858bf | 256 | } |
8676eb43 LT |
257 | |
258 | /* This is disgusting */ | |
259 | *args++ = "sh"; | |
260 | *args++ = "-c"; | |
261 | *args++ = cmd; | |
262 | *args = NULL; | |
263 | return "/bin/sh"; | |
86436c28 JH |
264 | } |
265 | ||
427dcb4b JH |
266 | struct diff_filespec *alloc_filespec(const char *path) |
267 | { | |
268 | int namelen = strlen(path); | |
269 | struct diff_filespec *spec = xmalloc(sizeof(*spec) + namelen + 1); | |
705a7148 LT |
270 | |
271 | memset(spec, 0, sizeof(*spec)); | |
427dcb4b | 272 | spec->path = (char *)(spec + 1); |
705a7148 | 273 | memcpy(spec->path, path, namelen+1); |
427dcb4b JH |
274 | return spec; |
275 | } | |
276 | ||
277 | void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1, | |
278 | unsigned short mode) | |
279 | { | |
4130b995 JH |
280 | if (mode) { |
281 | spec->mode = DIFF_FILE_CANON_MODE(mode); | |
81e50eab JH |
282 | memcpy(spec->sha1, sha1, 20); |
283 | spec->sha1_valid = !!memcmp(sha1, null_sha1, 20); | |
284 | } | |
427dcb4b JH |
285 | } |
286 | ||
b46f0b6d JH |
287 | /* |
288 | * Given a name and sha1 pair, if the dircache tells us the file in | |
289 | * the work tree has that object contents, return true, so that | |
290 | * prepare_temp_file() does not have to inflate and extract. | |
291 | */ | |
292 | static int work_tree_matches(const char *name, const unsigned char *sha1) | |
293 | { | |
294 | struct cache_entry *ce; | |
295 | struct stat st; | |
296 | int pos, len; | |
5c97558c | 297 | |
b46f0b6d JH |
298 | /* We do not read the cache ourselves here, because the |
299 | * benchmark with my previous version that always reads cache | |
300 | * shows that it makes things worse for diff-tree comparing | |
301 | * two linux-2.6 kernel trees in an already checked out work | |
915838c3 | 302 | * tree. This is because most diff-tree comparisons deal with |
b46f0b6d JH |
303 | * only a small number of files, while reading the cache is |
304 | * expensive for a large project, and its cost outweighs the | |
305 | * savings we get by not inflating the object to a temporary | |
306 | * file. Practically, this code only helps when we are used | |
307 | * by diff-cache --cached, which does read the cache before | |
308 | * calling us. | |
57fe64a4 | 309 | */ |
b46f0b6d JH |
310 | if (!active_cache) |
311 | return 0; | |
312 | ||
313 | len = strlen(name); | |
314 | pos = cache_name_pos(name, len); | |
315 | if (pos < 0) | |
316 | return 0; | |
317 | ce = active_cache[pos]; | |
b28858bf | 318 | if ((lstat(name, &st) < 0) || |
427dcb4b | 319 | !S_ISREG(st.st_mode) || /* careful! */ |
5f73076c | 320 | ce_match_stat(ce, &st, 0) || |
b46f0b6d JH |
321 | memcmp(sha1, ce->sha1, 20)) |
322 | return 0; | |
427dcb4b JH |
323 | /* we return 1 only when we can stat, it is a regular file, |
324 | * stat information matches, and sha1 recorded in the cache | |
325 | * matches. I.e. we know the file in the work tree really is | |
326 | * the same as the <name, sha1> pair. | |
327 | */ | |
b46f0b6d JH |
328 | return 1; |
329 | } | |
330 | ||
f0c6b2a2 JH |
331 | static struct sha1_size_cache { |
332 | unsigned char sha1[20]; | |
333 | unsigned long size; | |
334 | } **sha1_size_cache; | |
335 | static int sha1_size_cache_nr, sha1_size_cache_alloc; | |
336 | ||
337 | static struct sha1_size_cache *locate_size_cache(unsigned char *sha1, | |
0601e131 | 338 | int find_only, |
f0c6b2a2 JH |
339 | unsigned long size) |
340 | { | |
341 | int first, last; | |
342 | struct sha1_size_cache *e; | |
343 | ||
344 | first = 0; | |
345 | last = sha1_size_cache_nr; | |
346 | while (last > first) { | |
0601e131 | 347 | int cmp, next = (last + first) >> 1; |
f0c6b2a2 | 348 | e = sha1_size_cache[next]; |
0601e131 | 349 | cmp = memcmp(e->sha1, sha1, 20); |
f0c6b2a2 JH |
350 | if (!cmp) |
351 | return e; | |
352 | if (cmp < 0) { | |
353 | last = next; | |
354 | continue; | |
355 | } | |
356 | first = next+1; | |
357 | } | |
358 | /* not found */ | |
0601e131 | 359 | if (find_only) |
f0c6b2a2 JH |
360 | return NULL; |
361 | /* insert to make it at "first" */ | |
362 | if (sha1_size_cache_alloc <= sha1_size_cache_nr) { | |
363 | sha1_size_cache_alloc = alloc_nr(sha1_size_cache_alloc); | |
364 | sha1_size_cache = xrealloc(sha1_size_cache, | |
365 | sha1_size_cache_alloc * | |
366 | sizeof(*sha1_size_cache)); | |
367 | } | |
368 | sha1_size_cache_nr++; | |
369 | if (first < sha1_size_cache_nr) | |
370 | memmove(sha1_size_cache + first + 1, sha1_size_cache + first, | |
371 | (sha1_size_cache_nr - first - 1) * | |
372 | sizeof(*sha1_size_cache)); | |
373 | e = xmalloc(sizeof(struct sha1_size_cache)); | |
374 | sha1_size_cache[first] = e; | |
375 | memcpy(e->sha1, sha1, 20); | |
376 | e->size = size; | |
377 | return e; | |
378 | } | |
379 | ||
427dcb4b JH |
380 | /* |
381 | * While doing rename detection and pickaxe operation, we may need to | |
382 | * grab the data for the blob (or file) for our own in-core comparison. | |
383 | * diff_filespec has data and size fields for this purpose. | |
384 | */ | |
f0c6b2a2 | 385 | int diff_populate_filespec(struct diff_filespec *s, int size_only) |
427dcb4b JH |
386 | { |
387 | int err = 0; | |
81e50eab | 388 | if (!DIFF_FILE_VALID(s)) |
427dcb4b JH |
389 | die("internal error: asking to populate invalid file."); |
390 | if (S_ISDIR(s->mode)) | |
391 | return -1; | |
392 | ||
f0c6b2a2 JH |
393 | if (!use_size_cache) |
394 | size_only = 0; | |
395 | ||
427dcb4b JH |
396 | if (s->data) |
397 | return err; | |
398 | if (!s->sha1_valid || | |
399 | work_tree_matches(s->path, s->sha1)) { | |
400 | struct stat st; | |
401 | int fd; | |
402 | if (lstat(s->path, &st) < 0) { | |
403 | if (errno == ENOENT) { | |
404 | err_empty: | |
405 | err = -1; | |
406 | empty: | |
407 | s->data = ""; | |
408 | s->size = 0; | |
409 | return err; | |
410 | } | |
411 | } | |
412 | s->size = st.st_size; | |
413 | if (!s->size) | |
414 | goto empty; | |
f0c6b2a2 JH |
415 | if (size_only) |
416 | return 0; | |
427dcb4b JH |
417 | if (S_ISLNK(st.st_mode)) { |
418 | int ret; | |
419 | s->data = xmalloc(s->size); | |
420 | s->should_free = 1; | |
421 | ret = readlink(s->path, s->data, s->size); | |
422 | if (ret < 0) { | |
423 | free(s->data); | |
424 | goto err_empty; | |
425 | } | |
426 | return 0; | |
427 | } | |
428 | fd = open(s->path, O_RDONLY); | |
429 | if (fd < 0) | |
430 | goto err_empty; | |
431 | s->data = mmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0); | |
427dcb4b | 432 | close(fd); |
e35f9824 PR |
433 | if (s->data == MAP_FAILED) |
434 | goto err_empty; | |
435 | s->should_munmap = 1; | |
427dcb4b JH |
436 | } |
437 | else { | |
438 | char type[20]; | |
f0c6b2a2 JH |
439 | struct sha1_size_cache *e; |
440 | ||
441 | if (size_only) { | |
0601e131 | 442 | e = locate_size_cache(s->sha1, 1, 0); |
f0c6b2a2 JH |
443 | if (e) { |
444 | s->size = e->size; | |
445 | return 0; | |
446 | } | |
36e4d74a | 447 | if (!sha1_object_info(s->sha1, type, &s->size)) |
0601e131 | 448 | locate_size_cache(s->sha1, 0, s->size); |
65c2e0c3 JH |
449 | } |
450 | else { | |
451 | s->data = read_sha1_file(s->sha1, type, &s->size); | |
452 | s->should_free = 1; | |
f0c6b2a2 | 453 | } |
427dcb4b JH |
454 | } |
455 | return 0; | |
456 | } | |
457 | ||
19397b45 | 458 | void diff_free_filespec_data(struct diff_filespec *s) |
427dcb4b JH |
459 | { |
460 | if (s->should_free) | |
461 | free(s->data); | |
462 | else if (s->should_munmap) | |
463 | munmap(s->data, s->size); | |
19397b45 JH |
464 | s->should_free = s->should_munmap = 0; |
465 | s->data = NULL; | |
427dcb4b JH |
466 | } |
467 | ||
b28858bf JH |
468 | static void prep_temp_blob(struct diff_tempfile *temp, |
469 | void *blob, | |
470 | unsigned long size, | |
88cd621d | 471 | const unsigned char *sha1, |
b28858bf JH |
472 | int mode) |
473 | { | |
474 | int fd; | |
475 | ||
64f8a631 | 476 | fd = git_mkstemp(temp->tmp_path, TEMPFILE_PATH_LEN, ".diff_XXXXXX"); |
b28858bf JH |
477 | if (fd < 0) |
478 | die("unable to create temp-file"); | |
479 | if (write(fd, blob, size) != size) | |
480 | die("unable to write temp-file"); | |
481 | close(fd); | |
482 | temp->name = temp->tmp_path; | |
483 | strcpy(temp->hex, sha1_to_hex(sha1)); | |
484 | temp->hex[40] = 0; | |
485 | sprintf(temp->mode, "%06o", mode); | |
486 | } | |
487 | ||
be3cfa85 JH |
488 | static void prepare_temp_file(const char *name, |
489 | struct diff_tempfile *temp, | |
427dcb4b | 490 | struct diff_filespec *one) |
86436c28 | 491 | { |
81e50eab | 492 | if (!DIFF_FILE_VALID(one)) { |
be3cfa85 | 493 | not_a_valid_file: |
532149d7 JH |
494 | /* A '-' entry produces this for file-2, and |
495 | * a '+' entry produces this for file-1. | |
496 | */ | |
be3cfa85 JH |
497 | temp->name = "/dev/null"; |
498 | strcpy(temp->hex, "."); | |
499 | strcpy(temp->mode, "."); | |
86436c28 JH |
500 | return; |
501 | } | |
be3cfa85 | 502 | |
5c97558c | 503 | if (!one->sha1_valid || |
427dcb4b | 504 | work_tree_matches(name, one->sha1)) { |
be3cfa85 | 505 | struct stat st; |
427dcb4b | 506 | if (lstat(name, &st) < 0) { |
be3cfa85 JH |
507 | if (errno == ENOENT) |
508 | goto not_a_valid_file; | |
427dcb4b | 509 | die("stat(%s): %s", name, strerror(errno)); |
be3cfa85 | 510 | } |
b28858bf JH |
511 | if (S_ISLNK(st.st_mode)) { |
512 | int ret; | |
7e4a2a84 JH |
513 | char buf[PATH_MAX + 1]; /* ought to be SYMLINK_MAX */ |
514 | if (sizeof(buf) <= st.st_size) | |
515 | die("symlink too long: %s", name); | |
b28858bf JH |
516 | ret = readlink(name, buf, st.st_size); |
517 | if (ret < 0) | |
518 | die("readlink(%s)", name); | |
519 | prep_temp_blob(temp, buf, st.st_size, | |
520 | (one->sha1_valid ? | |
427dcb4b | 521 | one->sha1 : null_sha1), |
b28858bf JH |
522 | (one->sha1_valid ? |
523 | one->mode : S_IFLNK)); | |
524 | } | |
525 | else { | |
427dcb4b JH |
526 | /* we can borrow from the file in the work tree */ |
527 | temp->name = name; | |
b28858bf JH |
528 | if (!one->sha1_valid) |
529 | strcpy(temp->hex, sha1_to_hex(null_sha1)); | |
530 | else | |
427dcb4b | 531 | strcpy(temp->hex, sha1_to_hex(one->sha1)); |
9d429ff6 JH |
532 | /* Even though we may sometimes borrow the |
533 | * contents from the work tree, we always want | |
534 | * one->mode. mode is trustworthy even when | |
535 | * !(one->sha1_valid), as long as | |
536 | * DIFF_FILE_VALID(one). | |
537 | */ | |
538 | sprintf(temp->mode, "%06o", one->mode); | |
b28858bf JH |
539 | } |
540 | return; | |
be3cfa85 JH |
541 | } |
542 | else { | |
f0c6b2a2 | 543 | if (diff_populate_filespec(one, 0)) |
427dcb4b JH |
544 | die("cannot read data blob for %s", one->path); |
545 | prep_temp_blob(temp, one->data, one->size, | |
546 | one->sha1, one->mode); | |
be3cfa85 JH |
547 | } |
548 | } | |
549 | ||
550 | static void remove_tempfile(void) | |
551 | { | |
552 | int i; | |
553 | ||
554 | for (i = 0; i < 2; i++) | |
555 | if (diff_temp[i].name == diff_temp[i].tmp_path) { | |
556 | unlink(diff_temp[i].name); | |
557 | diff_temp[i].name = NULL; | |
558 | } | |
559 | } | |
560 | ||
532149d7 JH |
561 | static void remove_tempfile_on_signal(int signo) |
562 | { | |
563 | remove_tempfile(); | |
6a1f79c1 PB |
564 | signal(SIGINT, SIG_DFL); |
565 | raise(signo); | |
532149d7 JH |
566 | } |
567 | ||
8676eb43 LT |
568 | static int spawn_prog(const char *pgm, const char **arg) |
569 | { | |
570 | pid_t pid; | |
571 | int status; | |
572 | ||
573 | fflush(NULL); | |
574 | pid = fork(); | |
575 | if (pid < 0) | |
576 | die("unable to fork"); | |
577 | if (!pid) { | |
578 | execvp(pgm, (char *const*) arg); | |
579 | exit(255); | |
580 | } | |
581 | ||
582 | while (waitpid(pid, &status, 0) < 0) { | |
583 | if (errno == EINTR) | |
584 | continue; | |
585 | return -1; | |
586 | } | |
587 | ||
588 | /* Earlier we did not check the exit status because | |
589 | * diff exits non-zero if files are different, and | |
590 | * we are not interested in knowing that. It was a | |
591 | * mistake which made it harder to quit a diff-* | |
592 | * session that uses the git-apply-patch-script as | |
593 | * the GIT_EXTERNAL_DIFF. A custom GIT_EXTERNAL_DIFF | |
594 | * should also exit non-zero only when it wants to | |
595 | * abort the entire diff-* session. | |
596 | */ | |
597 | if (WIFEXITED(status) && !WEXITSTATUS(status)) | |
598 | return 0; | |
599 | return -1; | |
600 | } | |
601 | ||
be3cfa85 JH |
602 | /* An external diff command takes: |
603 | * | |
604 | * diff-cmd name infile1 infile1-sha1 infile1-mode \ | |
5c97558c | 605 | * infile2 infile2-sha1 infile2-mode [ rename-to ] |
be3cfa85 JH |
606 | * |
607 | */ | |
4130b995 JH |
608 | static void run_external_diff(const char *pgm, |
609 | const char *name, | |
5c97558c | 610 | const char *other, |
427dcb4b JH |
611 | struct diff_filespec *one, |
612 | struct diff_filespec *two, | |
366175ef JH |
613 | const char *xfrm_msg, |
614 | int complete_rewrite) | |
be3cfa85 | 615 | { |
8676eb43 | 616 | const char *spawn_arg[10]; |
be3cfa85 | 617 | struct diff_tempfile *temp = diff_temp; |
8676eb43 | 618 | int retval; |
be3cfa85 | 619 | static int atexit_asked = 0; |
c7c81b3a | 620 | const char *othername; |
be3cfa85 | 621 | |
c7c81b3a | 622 | othername = (other? other : name); |
77eb2720 JH |
623 | if (one && two) { |
624 | prepare_temp_file(name, &temp[0], one); | |
c7c81b3a | 625 | prepare_temp_file(othername, &temp[1], two); |
77eb2720 JH |
626 | if (! atexit_asked && |
627 | (temp[0].name == temp[0].tmp_path || | |
628 | temp[1].name == temp[1].tmp_path)) { | |
629 | atexit_asked = 1; | |
630 | atexit(remove_tempfile); | |
631 | } | |
532149d7 | 632 | signal(SIGINT, remove_tempfile_on_signal); |
be3cfa85 JH |
633 | } |
634 | ||
8676eb43 LT |
635 | if (pgm) { |
636 | const char **arg = &spawn_arg[0]; | |
637 | if (one && two) { | |
638 | *arg++ = pgm; | |
639 | *arg++ = name; | |
640 | *arg++ = temp[0].name; | |
641 | *arg++ = temp[0].hex; | |
642 | *arg++ = temp[0].mode; | |
643 | *arg++ = temp[1].name; | |
644 | *arg++ = temp[1].hex; | |
645 | *arg++ = temp[1].mode; | |
646 | if (other) { | |
647 | *arg++ = other; | |
648 | *arg++ = xfrm_msg; | |
5c97558c | 649 | } |
8676eb43 LT |
650 | } else { |
651 | *arg++ = pgm; | |
652 | *arg++ = name; | |
77eb2720 | 653 | } |
8676eb43 LT |
654 | *arg = NULL; |
655 | } else { | |
656 | if (one && two) { | |
657 | pgm = builtin_diff(name, othername, temp, xfrm_msg, complete_rewrite, spawn_arg); | |
658 | } else | |
77eb2720 | 659 | printf("* Unmerged path %s\n", name); |
be3cfa85 | 660 | } |
8676eb43 LT |
661 | |
662 | retval = 0; | |
663 | if (pgm) | |
664 | retval = spawn_prog(pgm, spawn_arg); | |
665 | remove_tempfile(); | |
666 | if (retval) { | |
6fa28064 JH |
667 | fprintf(stderr, "external diff died, stopping at %s.\n", name); |
668 | exit(1); | |
532149d7 | 669 | } |
be3cfa85 JH |
670 | } |
671 | ||
ec1fcc16 JH |
672 | static void diff_fill_sha1_info(struct diff_filespec *one) |
673 | { | |
674 | if (DIFF_FILE_VALID(one)) { | |
675 | if (!one->sha1_valid) { | |
676 | struct stat st; | |
975b31dc | 677 | if (lstat(one->path, &st) < 0) |
ec1fcc16 JH |
678 | die("stat %s", one->path); |
679 | if (index_path(one->sha1, one->path, &st, 0)) | |
680 | die("cannot hash %s\n", one->path); | |
681 | } | |
682 | } | |
683 | else | |
684 | memset(one->sha1, 0, 20); | |
685 | } | |
686 | ||
80b1e511 | 687 | static void run_diff(struct diff_filepair *p, struct diff_options *o) |
4130b995 JH |
688 | { |
689 | const char *pgm = external_diff(); | |
ec1fcc16 | 690 | char msg[PATH_MAX*2+300], *xfrm_msg; |
366175ef JH |
691 | struct diff_filespec *one; |
692 | struct diff_filespec *two; | |
693 | const char *name; | |
694 | const char *other; | |
cf9dfc66 | 695 | char *name_munged, *other_munged; |
366175ef | 696 | int complete_rewrite = 0; |
ec1fcc16 | 697 | int len; |
366175ef JH |
698 | |
699 | if (DIFF_PAIR_UNMERGED(p)) { | |
700 | /* unmerged */ | |
701 | run_external_diff(pgm, p->one->path, NULL, NULL, NULL, NULL, | |
702 | 0); | |
703 | return; | |
704 | } | |
705 | ||
706 | name = p->one->path; | |
707 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
cf9dfc66 JH |
708 | name_munged = quote_one(name); |
709 | other_munged = quote_one(other); | |
366175ef | 710 | one = p->one; two = p->two; |
ec1fcc16 JH |
711 | |
712 | diff_fill_sha1_info(one); | |
713 | diff_fill_sha1_info(two); | |
714 | ||
715 | len = 0; | |
366175ef | 716 | switch (p->status) { |
e7baa4f4 | 717 | case DIFF_STATUS_COPIED: |
ec1fcc16 JH |
718 | len += snprintf(msg + len, sizeof(msg) - len, |
719 | "similarity index %d%%\n" | |
720 | "copy from %s\n" | |
721 | "copy to %s\n", | |
722 | (int)(0.5 + p->score * 100.0/MAX_SCORE), | |
cf9dfc66 | 723 | name_munged, other_munged); |
366175ef | 724 | break; |
e7baa4f4 | 725 | case DIFF_STATUS_RENAMED: |
ec1fcc16 JH |
726 | len += snprintf(msg + len, sizeof(msg) - len, |
727 | "similarity index %d%%\n" | |
728 | "rename from %s\n" | |
729 | "rename to %s\n", | |
730 | (int)(0.5 + p->score * 100.0/MAX_SCORE), | |
cf9dfc66 | 731 | name_munged, other_munged); |
366175ef | 732 | break; |
e7baa4f4 | 733 | case DIFF_STATUS_MODIFIED: |
366175ef | 734 | if (p->score) { |
ec1fcc16 JH |
735 | len += snprintf(msg + len, sizeof(msg) - len, |
736 | "dissimilarity index %d%%\n", | |
737 | (int)(0.5 + p->score * | |
738 | 100.0/MAX_SCORE)); | |
366175ef JH |
739 | complete_rewrite = 1; |
740 | break; | |
741 | } | |
742 | /* fallthru */ | |
743 | default: | |
ec1fcc16 JH |
744 | /* nothing */ |
745 | ; | |
366175ef JH |
746 | } |
747 | ||
ec1fcc16 JH |
748 | if (memcmp(one->sha1, two->sha1, 20)) { |
749 | char one_sha1[41]; | |
46a6c262 | 750 | int abbrev = o->full_index ? 40 : DEFAULT_ABBREV; |
ec1fcc16 JH |
751 | memcpy(one_sha1, sha1_to_hex(one->sha1), 41); |
752 | ||
753 | len += snprintf(msg + len, sizeof(msg) - len, | |
47dd0d59 JH |
754 | "index %.*s..%.*s", |
755 | abbrev, one_sha1, abbrev, | |
756 | sha1_to_hex(two->sha1)); | |
ec1fcc16 JH |
757 | if (one->mode == two->mode) |
758 | len += snprintf(msg + len, sizeof(msg) - len, | |
759 | " %06o", one->mode); | |
760 | len += snprintf(msg + len, sizeof(msg) - len, "\n"); | |
761 | } | |
762 | ||
763 | if (len) | |
764 | msg[--len] = 0; | |
765 | xfrm_msg = len ? msg : NULL; | |
766 | ||
4130b995 JH |
767 | if (!pgm && |
768 | DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) && | |
769 | (S_IFMT & one->mode) != (S_IFMT & two->mode)) { | |
770 | /* a filepair that changes between file and symlink | |
771 | * needs to be split into deletion and creation. | |
772 | */ | |
773 | struct diff_filespec *null = alloc_filespec(two->path); | |
366175ef | 774 | run_external_diff(NULL, name, other, one, null, xfrm_msg, 0); |
4130b995 JH |
775 | free(null); |
776 | null = alloc_filespec(one->path); | |
366175ef | 777 | run_external_diff(NULL, name, other, null, two, xfrm_msg, 0); |
4130b995 JH |
778 | free(null); |
779 | } | |
780 | else | |
366175ef JH |
781 | run_external_diff(pgm, name, other, one, two, xfrm_msg, |
782 | complete_rewrite); | |
cf9dfc66 JH |
783 | |
784 | free(name_munged); | |
785 | free(other_munged); | |
4130b995 JH |
786 | } |
787 | ||
6b5ee137 | 788 | void diff_setup(struct diff_options *options) |
5c97558c | 789 | { |
6b5ee137 JH |
790 | memset(options, 0, sizeof(*options)); |
791 | options->output_format = DIFF_FORMAT_RAW; | |
792 | options->line_termination = '\n'; | |
793 | options->break_opt = -1; | |
8082d8d3 | 794 | options->rename_limit = -1; |
ac1b3d12 LT |
795 | |
796 | options->change = diff_change; | |
797 | options->add_remove = diff_addremove; | |
6b5ee137 JH |
798 | } |
799 | ||
800 | int diff_setup_done(struct diff_options *options) | |
801 | { | |
3299c6f6 JH |
802 | if ((options->find_copies_harder && |
803 | options->detect_rename != DIFF_DETECT_COPY) || | |
804 | (0 <= options->rename_limit && !options->detect_rename)) | |
6b5ee137 | 805 | return -1; |
3299c6f6 JH |
806 | if (options->detect_rename && options->rename_limit < 0) |
807 | options->rename_limit = diff_rename_limit_default; | |
6b5ee137 | 808 | if (options->setup & DIFF_SETUP_USE_CACHE) { |
f0c6b2a2 JH |
809 | if (!active_cache) |
810 | /* read-cache does not die even when it fails | |
811 | * so it is safe for us to do this here. Also | |
812 | * it does not smudge active_cache or active_nr | |
813 | * when it fails, so we do not have to worry about | |
82f9d58a | 814 | * cleaning it up ourselves either. |
f0c6b2a2 JH |
815 | */ |
816 | read_cache(); | |
817 | } | |
6b5ee137 | 818 | if (options->setup & DIFF_SETUP_USE_SIZE_CACHE) |
f0c6b2a2 | 819 | use_size_cache = 1; |
47dd0d59 JH |
820 | if (options->abbrev <= 0 || 40 < options->abbrev) |
821 | options->abbrev = 40; /* full */ | |
6b5ee137 JH |
822 | |
823 | return 0; | |
824 | } | |
825 | ||
826 | int diff_opt_parse(struct diff_options *options, const char **av, int ac) | |
827 | { | |
828 | const char *arg = av[0]; | |
829 | if (!strcmp(arg, "-p") || !strcmp(arg, "-u")) | |
830 | options->output_format = DIFF_FORMAT_PATCH; | |
831 | else if (!strcmp(arg, "-z")) | |
832 | options->line_termination = 0; | |
8082d8d3 JH |
833 | else if (!strncmp(arg, "-l", 2)) |
834 | options->rename_limit = strtoul(arg+2, NULL, 10); | |
80b1e511 JH |
835 | else if (!strcmp(arg, "--full-index")) |
836 | options->full_index = 1; | |
6b5ee137 JH |
837 | else if (!strcmp(arg, "--name-only")) |
838 | options->output_format = DIFF_FORMAT_NAME; | |
946f5f7c JH |
839 | else if (!strcmp(arg, "--name-status")) |
840 | options->output_format = DIFF_FORMAT_NAME_STATUS; | |
6b5ee137 JH |
841 | else if (!strcmp(arg, "-R")) |
842 | options->reverse_diff = 1; | |
843 | else if (!strncmp(arg, "-S", 2)) | |
844 | options->pickaxe = arg + 2; | |
845 | else if (!strcmp(arg, "-s")) | |
846 | options->output_format = DIFF_FORMAT_NO_OUTPUT; | |
847 | else if (!strncmp(arg, "-O", 2)) | |
848 | options->orderfile = arg + 2; | |
849 | else if (!strncmp(arg, "--diff-filter=", 14)) | |
850 | options->filter = arg + 14; | |
851 | else if (!strcmp(arg, "--pickaxe-all")) | |
852 | options->pickaxe_opts = DIFF_PICKAXE_ALL; | |
853 | else if (!strncmp(arg, "-B", 2)) { | |
854 | if ((options->break_opt = | |
855 | diff_scoreopt_parse(arg)) == -1) | |
856 | return -1; | |
857 | } | |
858 | else if (!strncmp(arg, "-M", 2)) { | |
859 | if ((options->rename_score = | |
860 | diff_scoreopt_parse(arg)) == -1) | |
861 | return -1; | |
862 | options->detect_rename = DIFF_DETECT_RENAME; | |
863 | } | |
864 | else if (!strncmp(arg, "-C", 2)) { | |
865 | if ((options->rename_score = | |
866 | diff_scoreopt_parse(arg)) == -1) | |
867 | return -1; | |
868 | options->detect_rename = DIFF_DETECT_COPY; | |
869 | } | |
870 | else if (!strcmp(arg, "--find-copies-harder")) | |
871 | options->find_copies_harder = 1; | |
47dd0d59 | 872 | else if (!strcmp(arg, "--abbrev")) |
46a6c262 | 873 | options->abbrev = DEFAULT_ABBREV; |
6b1ddbdd | 874 | else if (!strncmp(arg, "--abbrev=", 9)) { |
47dd0d59 | 875 | options->abbrev = strtoul(arg + 9, NULL, 10); |
6b1ddbdd JH |
876 | if (options->abbrev < MINIMUM_ABBREV) |
877 | options->abbrev = MINIMUM_ABBREV; | |
878 | else if (40 < options->abbrev) | |
879 | options->abbrev = 40; | |
880 | } | |
6b5ee137 JH |
881 | else |
882 | return 0; | |
883 | return 1; | |
5c97558c JH |
884 | } |
885 | ||
0e3994fa JH |
886 | static int parse_num(const char **cp_p) |
887 | { | |
1b1480ff PA |
888 | unsigned long num, scale; |
889 | int ch, dot; | |
0e3994fa JH |
890 | const char *cp = *cp_p; |
891 | ||
1b1480ff | 892 | num = 0; |
0e3994fa | 893 | scale = 1; |
1b1480ff PA |
894 | dot = 0; |
895 | for(;;) { | |
896 | ch = *cp; | |
897 | if ( !dot && ch == '.' ) { | |
898 | scale = 1; | |
899 | dot = 1; | |
900 | } else if ( ch == '%' ) { | |
901 | scale = dot ? scale*100 : 100; | |
902 | cp++; /* % is always at the end */ | |
903 | break; | |
904 | } else if ( ch >= '0' && ch <= '9' ) { | |
905 | if ( scale < 100000 ) { | |
906 | scale *= 10; | |
907 | num = (num*10) + (ch-'0'); | |
908 | } | |
909 | } else { | |
910 | break; | |
0e3994fa | 911 | } |
5de36bfe | 912 | cp++; |
0e3994fa JH |
913 | } |
914 | *cp_p = cp; | |
915 | ||
916 | /* user says num divided by scale and we say internally that | |
917 | * is MAX_SCORE * num / scale. | |
918 | */ | |
1b1480ff | 919 | return (num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale); |
0e3994fa JH |
920 | } |
921 | ||
922 | int diff_scoreopt_parse(const char *opt) | |
923 | { | |
eeaa4603 | 924 | int opt1, opt2, cmd; |
0e3994fa JH |
925 | |
926 | if (*opt++ != '-') | |
927 | return -1; | |
928 | cmd = *opt++; | |
929 | if (cmd != 'M' && cmd != 'C' && cmd != 'B') | |
930 | return -1; /* that is not a -M, -C nor -B option */ | |
931 | ||
932 | opt1 = parse_num(&opt); | |
eeaa4603 JH |
933 | if (cmd != 'B') |
934 | opt2 = 0; | |
935 | else { | |
936 | if (*opt == 0) | |
937 | opt2 = 0; | |
938 | else if (*opt != '/') | |
939 | return -1; /* we expect -B80/99 or -B80 */ | |
940 | else { | |
941 | opt++; | |
942 | opt2 = parse_num(&opt); | |
943 | } | |
944 | } | |
0e3994fa JH |
945 | if (*opt != 0) |
946 | return -1; | |
eeaa4603 | 947 | return opt1 | (opt2 << 16); |
0e3994fa JH |
948 | } |
949 | ||
6b14d7fa JH |
950 | struct diff_queue_struct diff_queued_diff; |
951 | ||
952 | void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp) | |
5c97558c | 953 | { |
6b14d7fa JH |
954 | if (queue->alloc <= queue->nr) { |
955 | queue->alloc = alloc_nr(queue->alloc); | |
956 | queue->queue = xrealloc(queue->queue, | |
957 | sizeof(dp) * queue->alloc); | |
81e50eab | 958 | } |
6b14d7fa | 959 | queue->queue[queue->nr++] = dp; |
5c97558c JH |
960 | } |
961 | ||
52e95789 | 962 | struct diff_filepair *diff_queue(struct diff_queue_struct *queue, |
6b14d7fa JH |
963 | struct diff_filespec *one, |
964 | struct diff_filespec *two) | |
5c97558c | 965 | { |
52e95789 | 966 | struct diff_filepair *dp = xmalloc(sizeof(*dp)); |
427dcb4b JH |
967 | dp->one = one; |
968 | dp->two = two; | |
f7c1512a | 969 | dp->score = 0; |
2210100a | 970 | dp->status = 0; |
15d061b4 | 971 | dp->source_stays = 0; |
f345b0a0 | 972 | dp->broken_pair = 0; |
5098bafb JH |
973 | if (queue) |
974 | diff_q(queue, dp); | |
427dcb4b | 975 | return dp; |
5c97558c JH |
976 | } |
977 | ||
226406f6 JH |
978 | void diff_free_filepair(struct diff_filepair *p) |
979 | { | |
19397b45 JH |
980 | diff_free_filespec_data(p->one); |
981 | diff_free_filespec_data(p->two); | |
5098bafb JH |
982 | free(p->one); |
983 | free(p->two); | |
226406f6 JH |
984 | free(p); |
985 | } | |
986 | ||
47dd0d59 | 987 | /* This is different from find_unique_abbrev() in that |
297a1aad | 988 | * it stuffs the result with dots for alignment. |
47dd0d59 JH |
989 | */ |
990 | const char *diff_unique_abbrev(const unsigned char *sha1, int len) | |
991 | { | |
992 | int abblen; | |
993 | const char *abbrev; | |
994 | if (len == 40) | |
995 | return sha1_to_hex(sha1); | |
996 | ||
997 | abbrev = find_unique_abbrev(sha1, len); | |
297a1aad JH |
998 | if (!abbrev) |
999 | return sha1_to_hex(sha1); | |
47dd0d59 JH |
1000 | abblen = strlen(abbrev); |
1001 | if (abblen < 37) { | |
1002 | static char hex[41]; | |
1003 | if (len < abblen && abblen <= len + 2) | |
1004 | sprintf(hex, "%s%.*s", abbrev, len+3-abblen, ".."); | |
1005 | else | |
1006 | sprintf(hex, "%s...", abbrev); | |
1007 | return hex; | |
1008 | } | |
1009 | return sha1_to_hex(sha1); | |
1010 | } | |
1011 | ||
bceafe75 JH |
1012 | static void diff_flush_raw(struct diff_filepair *p, |
1013 | int line_termination, | |
946f5f7c | 1014 | int inter_name_termination, |
47dd0d59 | 1015 | struct diff_options *options) |
5c97558c | 1016 | { |
b6d8f309 JH |
1017 | int two_paths; |
1018 | char status[10]; | |
47dd0d59 | 1019 | int abbrev = options->abbrev; |
cf9dfc66 | 1020 | const char *path_one, *path_two; |
47dd0d59 | 1021 | int output_format = options->output_format; |
25d5ea41 | 1022 | |
cf9dfc66 JH |
1023 | path_one = p->one->path; |
1024 | path_two = p->two->path; | |
25d5ea41 | 1025 | if (line_termination) { |
cf9dfc66 JH |
1026 | path_one = quote_one(path_one); |
1027 | path_two = quote_one(path_two); | |
25d5ea41 JH |
1028 | } |
1029 | ||
366175ef JH |
1030 | if (p->score) |
1031 | sprintf(status, "%c%03d", p->status, | |
1032 | (int)(0.5 + p->score * 100.0/MAX_SCORE)); | |
1033 | else { | |
1034 | status[0] = p->status; | |
1035 | status[1] = 0; | |
1036 | } | |
b6d8f309 | 1037 | switch (p->status) { |
e7baa4f4 JH |
1038 | case DIFF_STATUS_COPIED: |
1039 | case DIFF_STATUS_RENAMED: | |
b6d8f309 | 1040 | two_paths = 1; |
b6d8f309 | 1041 | break; |
e7baa4f4 JH |
1042 | case DIFF_STATUS_ADDED: |
1043 | case DIFF_STATUS_DELETED: | |
f345b0a0 | 1044 | two_paths = 0; |
f345b0a0 | 1045 | break; |
b6d8f309 JH |
1046 | default: |
1047 | two_paths = 0; | |
b6d8f309 | 1048 | break; |
6b14d7fa | 1049 | } |
946f5f7c JH |
1050 | if (output_format != DIFF_FORMAT_NAME_STATUS) { |
1051 | printf(":%06o %06o %s ", | |
47dd0d59 JH |
1052 | p->one->mode, p->two->mode, |
1053 | diff_unique_abbrev(p->one->sha1, abbrev)); | |
1054 | printf("%s ", | |
1055 | diff_unique_abbrev(p->two->sha1, abbrev)); | |
946f5f7c | 1056 | } |
cf9dfc66 | 1057 | printf("%s%c%s", status, inter_name_termination, path_one); |
b6d8f309 | 1058 | if (two_paths) |
cf9dfc66 | 1059 | printf("%c%s", inter_name_termination, path_two); |
b6d8f309 | 1060 | putchar(line_termination); |
cf9dfc66 JH |
1061 | if (path_one != p->one->path) |
1062 | free((void*)path_one); | |
1063 | if (path_two != p->two->path) | |
1064 | free((void*)path_two); | |
5c97558c JH |
1065 | } |
1066 | ||
52f28529 | 1067 | static void diff_flush_name(struct diff_filepair *p, |
cf9dfc66 | 1068 | int inter_name_termination, |
52f28529 JH |
1069 | int line_termination) |
1070 | { | |
cf9dfc66 JH |
1071 | char *path = p->two->path; |
1072 | ||
1073 | if (line_termination) | |
1074 | path = quote_one(p->two->path); | |
1075 | else | |
1076 | path = p->two->path; | |
1077 | printf("%s%c", path, line_termination); | |
1078 | if (p->two->path != path) | |
1079 | free(path); | |
52f28529 JH |
1080 | } |
1081 | ||
f7c1512a | 1082 | int diff_unmodified_pair(struct diff_filepair *p) |
5c97558c | 1083 | { |
427dcb4b JH |
1084 | /* This function is written stricter than necessary to support |
1085 | * the currently implemented transformers, but the idea is to | |
52e95789 | 1086 | * let transformers to produce diff_filepairs any way they want, |
427dcb4b | 1087 | * and filter and clean them up here before producing the output. |
5c97558c | 1088 | */ |
6b14d7fa JH |
1089 | struct diff_filespec *one, *two; |
1090 | ||
1091 | if (DIFF_PAIR_UNMERGED(p)) | |
1092 | return 0; /* unmerged is interesting */ | |
5c97558c | 1093 | |
6b14d7fa JH |
1094 | one = p->one; |
1095 | two = p->two; | |
5c97558c | 1096 | |
4130b995 JH |
1097 | /* deletion, addition, mode or type change |
1098 | * and rename are all interesting. | |
1099 | */ | |
81e50eab | 1100 | if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) || |
4130b995 | 1101 | DIFF_PAIR_MODE_CHANGED(p) || |
427dcb4b JH |
1102 | strcmp(one->path, two->path)) |
1103 | return 0; | |
57fe64a4 | 1104 | |
427dcb4b JH |
1105 | /* both are valid and point at the same path. that is, we are |
1106 | * dealing with a change. | |
57fe64a4 | 1107 | */ |
427dcb4b JH |
1108 | if (one->sha1_valid && two->sha1_valid && |
1109 | !memcmp(one->sha1, two->sha1, sizeof(one->sha1))) | |
1110 | return 1; /* no change */ | |
1111 | if (!one->sha1_valid && !two->sha1_valid) | |
1112 | return 1; /* both look at the same file on the filesystem. */ | |
1113 | return 0; | |
57fe64a4 JH |
1114 | } |
1115 | ||
80b1e511 | 1116 | static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o) |
f7c1512a | 1117 | { |
f7c1512a JH |
1118 | if (diff_unmodified_pair(p)) |
1119 | return; | |
1120 | ||
f7c1512a JH |
1121 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || |
1122 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
1123 | return; /* no tree diffs in patch format */ | |
1124 | ||
80b1e511 | 1125 | run_diff(p, o); |
f7c1512a JH |
1126 | } |
1127 | ||
bceafe75 | 1128 | int diff_queue_is_empty(void) |
f7c1512a | 1129 | { |
bceafe75 | 1130 | struct diff_queue_struct *q = &diff_queued_diff; |
25d5ea41 JH |
1131 | int i; |
1132 | for (i = 0; i < q->nr; i++) | |
1133 | if (!diff_unmodified_pair(q->queue[i])) | |
1134 | return 0; | |
1135 | return 1; | |
f7c1512a JH |
1136 | } |
1137 | ||
25d5ea41 JH |
1138 | #if DIFF_DEBUG |
1139 | void diff_debug_filespec(struct diff_filespec *s, int x, const char *one) | |
1140 | { | |
1141 | fprintf(stderr, "queue[%d] %s (%s) %s %06o %s\n", | |
c7c81b3a | 1142 | x, one ? one : "", |
25d5ea41 JH |
1143 | s->path, |
1144 | DIFF_FILE_VALID(s) ? "valid" : "invalid", | |
1145 | s->mode, | |
1146 | s->sha1_valid ? sha1_to_hex(s->sha1) : ""); | |
1147 | fprintf(stderr, "queue[%d] %s size %lu flags %d\n", | |
c7c81b3a | 1148 | x, one ? one : "", |
25d5ea41 JH |
1149 | s->size, s->xfrm_flags); |
1150 | } | |
1151 | ||
1152 | void diff_debug_filepair(const struct diff_filepair *p, int i) | |
1153 | { | |
1154 | diff_debug_filespec(p->one, i, "one"); | |
1155 | diff_debug_filespec(p->two, i, "two"); | |
f345b0a0 | 1156 | fprintf(stderr, "score %d, status %c stays %d broken %d\n", |
c7c81b3a | 1157 | p->score, p->status ? p->status : '?', |
f345b0a0 | 1158 | p->source_stays, p->broken_pair); |
25d5ea41 JH |
1159 | } |
1160 | ||
1161 | void diff_debug_queue(const char *msg, struct diff_queue_struct *q) | |
6b14d7fa | 1162 | { |
6b14d7fa | 1163 | int i; |
25d5ea41 JH |
1164 | if (msg) |
1165 | fprintf(stderr, "%s\n", msg); | |
1166 | fprintf(stderr, "q->nr = %d\n", q->nr); | |
6b14d7fa JH |
1167 | for (i = 0; i < q->nr; i++) { |
1168 | struct diff_filepair *p = q->queue[i]; | |
25d5ea41 JH |
1169 | diff_debug_filepair(p, i); |
1170 | } | |
1171 | } | |
1172 | #endif | |
1173 | ||
1174 | static void diff_resolve_rename_copy(void) | |
1175 | { | |
1176 | int i, j; | |
1177 | struct diff_filepair *p, *pp; | |
1178 | struct diff_queue_struct *q = &diff_queued_diff; | |
1179 | ||
25d5ea41 JH |
1180 | diff_debug_queue("resolve-rename-copy", q); |
1181 | ||
1182 | for (i = 0; i < q->nr; i++) { | |
1183 | p = q->queue[i]; | |
96716a19 | 1184 | p->status = 0; /* undecided */ |
bceafe75 | 1185 | if (DIFF_PAIR_UNMERGED(p)) |
e7baa4f4 | 1186 | p->status = DIFF_STATUS_UNMERGED; |
15d061b4 | 1187 | else if (!DIFF_FILE_VALID(p->one)) |
e7baa4f4 | 1188 | p->status = DIFF_STATUS_ADDED; |
2cd68882 | 1189 | else if (!DIFF_FILE_VALID(p->two)) |
e7baa4f4 | 1190 | p->status = DIFF_STATUS_DELETED; |
96716a19 | 1191 | else if (DIFF_PAIR_TYPE_CHANGED(p)) |
e7baa4f4 | 1192 | p->status = DIFF_STATUS_TYPE_CHANGED; |
96716a19 JH |
1193 | |
1194 | /* from this point on, we are dealing with a pair | |
1195 | * whose both sides are valid and of the same type, i.e. | |
1196 | * either in-place edit or rename/copy edit. | |
1197 | */ | |
01c4e70f | 1198 | else if (DIFF_PAIR_RENAME(p)) { |
15d061b4 | 1199 | if (p->source_stays) { |
e7baa4f4 | 1200 | p->status = DIFF_STATUS_COPIED; |
15d061b4 JH |
1201 | continue; |
1202 | } | |
1203 | /* See if there is some other filepair that | |
1204 | * copies from the same source as us. If so | |
6bac10d8 JH |
1205 | * we are a copy. Otherwise we are either a |
1206 | * copy if the path stays, or a rename if it | |
1207 | * does not, but we already handled "stays" case. | |
25d5ea41 | 1208 | */ |
15d061b4 | 1209 | for (j = i + 1; j < q->nr; j++) { |
25d5ea41 JH |
1210 | pp = q->queue[j]; |
1211 | if (strcmp(pp->one->path, p->one->path)) | |
15d061b4 | 1212 | continue; /* not us */ |
01c4e70f | 1213 | if (!DIFF_PAIR_RENAME(pp)) |
15d061b4 JH |
1214 | continue; /* not a rename/copy */ |
1215 | /* pp is a rename/copy from the same source */ | |
e7baa4f4 | 1216 | p->status = DIFF_STATUS_COPIED; |
15d061b4 | 1217 | break; |
25d5ea41 JH |
1218 | } |
1219 | if (!p->status) | |
e7baa4f4 | 1220 | p->status = DIFF_STATUS_RENAMED; |
bceafe75 | 1221 | } |
9fdade06 JH |
1222 | else if (memcmp(p->one->sha1, p->two->sha1, 20) || |
1223 | p->one->mode != p->two->mode) | |
e7baa4f4 | 1224 | p->status = DIFF_STATUS_MODIFIED; |
67574c40 JH |
1225 | else { |
1226 | /* This is a "no-change" entry and should not | |
1227 | * happen anymore, but prepare for broken callers. | |
15d061b4 | 1228 | */ |
67574c40 JH |
1229 | error("feeding unmodified %s to diffcore", |
1230 | p->one->path); | |
e7baa4f4 | 1231 | p->status = DIFF_STATUS_UNKNOWN; |
67574c40 | 1232 | } |
6b14d7fa | 1233 | } |
25d5ea41 | 1234 | diff_debug_queue("resolve-rename-copy done", q); |
38c6f780 JH |
1235 | } |
1236 | ||
6b5ee137 | 1237 | void diff_flush(struct diff_options *options) |
38c6f780 JH |
1238 | { |
1239 | struct diff_queue_struct *q = &diff_queued_diff; | |
1240 | int i; | |
bceafe75 | 1241 | int inter_name_termination = '\t'; |
6b5ee137 JH |
1242 | int diff_output_format = options->output_format; |
1243 | int line_termination = options->line_termination; | |
38c6f780 | 1244 | |
e68b6f15 LT |
1245 | if (!line_termination) |
1246 | inter_name_termination = 0; | |
bceafe75 | 1247 | |
f7c1512a | 1248 | for (i = 0; i < q->nr; i++) { |
f7c1512a | 1249 | struct diff_filepair *p = q->queue[i]; |
6b5ee137 | 1250 | if ((diff_output_format == DIFF_FORMAT_NO_OUTPUT) || |
e7baa4f4 | 1251 | (p->status == DIFF_STATUS_UNKNOWN)) |
96716a19 | 1252 | continue; |
bceafe75 | 1253 | if (p->status == 0) |
96716a19 | 1254 | die("internal error in diff-resolve-rename-copy"); |
6b5ee137 | 1255 | switch (diff_output_format) { |
bceafe75 | 1256 | case DIFF_FORMAT_PATCH: |
80b1e511 | 1257 | diff_flush_patch(p, options); |
bceafe75 | 1258 | break; |
e68b6f15 | 1259 | case DIFF_FORMAT_RAW: |
946f5f7c | 1260 | case DIFF_FORMAT_NAME_STATUS: |
bceafe75 | 1261 | diff_flush_raw(p, line_termination, |
946f5f7c | 1262 | inter_name_termination, |
47dd0d59 | 1263 | options); |
bceafe75 | 1264 | break; |
52f28529 | 1265 | case DIFF_FORMAT_NAME: |
cf9dfc66 JH |
1266 | diff_flush_name(p, |
1267 | inter_name_termination, | |
1268 | line_termination); | |
52f28529 | 1269 | break; |
bceafe75 | 1270 | } |
226406f6 | 1271 | diff_free_filepair(q->queue[i]); |
90a734dc | 1272 | } |
427dcb4b JH |
1273 | free(q->queue); |
1274 | q->queue = NULL; | |
1275 | q->nr = q->alloc = 0; | |
5c97558c JH |
1276 | } |
1277 | ||
f2ce9fde JH |
1278 | static void diffcore_apply_filter(const char *filter) |
1279 | { | |
1280 | int i; | |
1281 | struct diff_queue_struct *q = &diff_queued_diff; | |
1282 | struct diff_queue_struct outq; | |
1283 | outq.queue = NULL; | |
1284 | outq.nr = outq.alloc = 0; | |
1285 | ||
1286 | if (!filter) | |
1287 | return; | |
1288 | ||
e7baa4f4 | 1289 | if (strchr(filter, DIFF_STATUS_FILTER_AON)) { |
f2ce9fde JH |
1290 | int found; |
1291 | for (i = found = 0; !found && i < q->nr; i++) { | |
1292 | struct diff_filepair *p = q->queue[i]; | |
e7baa4f4 JH |
1293 | if (((p->status == DIFF_STATUS_MODIFIED) && |
1294 | ((p->score && | |
1295 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
1296 | (!p->score && | |
1297 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
1298 | ((p->status != DIFF_STATUS_MODIFIED) && | |
1299 | strchr(filter, p->status))) | |
f2ce9fde JH |
1300 | found++; |
1301 | } | |
1302 | if (found) | |
1303 | return; | |
1304 | ||
1305 | /* otherwise we will clear the whole queue | |
1306 | * by copying the empty outq at the end of this | |
1307 | * function, but first clear the current entries | |
1308 | * in the queue. | |
1309 | */ | |
1310 | for (i = 0; i < q->nr; i++) | |
1311 | diff_free_filepair(q->queue[i]); | |
1312 | } | |
1313 | else { | |
1314 | /* Only the matching ones */ | |
1315 | for (i = 0; i < q->nr; i++) { | |
1316 | struct diff_filepair *p = q->queue[i]; | |
e7baa4f4 JH |
1317 | |
1318 | if (((p->status == DIFF_STATUS_MODIFIED) && | |
1319 | ((p->score && | |
1320 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
1321 | (!p->score && | |
1322 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
1323 | ((p->status != DIFF_STATUS_MODIFIED) && | |
1324 | strchr(filter, p->status))) | |
f2ce9fde JH |
1325 | diff_q(&outq, p); |
1326 | else | |
1327 | diff_free_filepair(p); | |
1328 | } | |
1329 | } | |
1330 | free(q->queue); | |
1331 | *q = outq; | |
1332 | } | |
1333 | ||
6b5ee137 | 1334 | void diffcore_std(struct diff_options *options) |
befe8639 | 1335 | { |
6b5ee137 JH |
1336 | if (options->paths && options->paths[0]) |
1337 | diffcore_pathspec(options->paths); | |
1338 | if (options->break_opt != -1) | |
1339 | diffcore_break(options->break_opt); | |
1340 | if (options->detect_rename) | |
8082d8d3 | 1341 | diffcore_rename(options); |
6b5ee137 | 1342 | if (options->break_opt != -1) |
eeaa4603 | 1343 | diffcore_merge_broken(); |
6b5ee137 JH |
1344 | if (options->pickaxe) |
1345 | diffcore_pickaxe(options->pickaxe, options->pickaxe_opts); | |
1346 | if (options->orderfile) | |
1347 | diffcore_order(options->orderfile); | |
f2ce9fde | 1348 | diff_resolve_rename_copy(); |
6b5ee137 | 1349 | diffcore_apply_filter(options->filter); |
f2ce9fde JH |
1350 | } |
1351 | ||
1352 | ||
6b5ee137 | 1353 | void diffcore_std_no_resolve(struct diff_options *options) |
f2ce9fde | 1354 | { |
6b5ee137 JH |
1355 | if (options->pickaxe) |
1356 | diffcore_pickaxe(options->pickaxe, options->pickaxe_opts); | |
1357 | if (options->orderfile) | |
1358 | diffcore_order(options->orderfile); | |
1359 | diffcore_apply_filter(options->filter); | |
befe8639 JH |
1360 | } |
1361 | ||
6b5ee137 JH |
1362 | void diff_addremove(struct diff_options *options, |
1363 | int addremove, unsigned mode, | |
77eb2720 JH |
1364 | const unsigned char *sha1, |
1365 | const char *base, const char *path) | |
be3cfa85 | 1366 | { |
77eb2720 | 1367 | char concatpath[PATH_MAX]; |
427dcb4b JH |
1368 | struct diff_filespec *one, *two; |
1369 | ||
1370 | /* This may look odd, but it is a preparation for | |
1371 | * feeding "there are unchanged files which should | |
1372 | * not produce diffs, but when you are doing copy | |
1373 | * detection you would need them, so here they are" | |
1374 | * entries to the diff-core. They will be prefixed | |
1375 | * with something like '=' or '*' (I haven't decided | |
1376 | * which but should not make any difference). | |
f7c1512a | 1377 | * Feeding the same new and old to diff_change() |
bceafe75 JH |
1378 | * also has the same effect. |
1379 | * Before the final output happens, they are pruned after | |
1380 | * merged into rename/copy pairs as appropriate. | |
427dcb4b | 1381 | */ |
6b5ee137 | 1382 | if (options->reverse_diff) |
427dcb4b JH |
1383 | addremove = (addremove == '+' ? '-' : |
1384 | addremove == '-' ? '+' : addremove); | |
7ca45252 | 1385 | |
427dcb4b JH |
1386 | if (!path) path = ""; |
1387 | sprintf(concatpath, "%s%s", base, path); | |
1388 | one = alloc_filespec(concatpath); | |
1389 | two = alloc_filespec(concatpath); | |
be3cfa85 | 1390 | |
427dcb4b JH |
1391 | if (addremove != '+') |
1392 | fill_filespec(one, sha1, mode); | |
1393 | if (addremove != '-') | |
1394 | fill_filespec(two, sha1, mode); | |
5c97558c | 1395 | |
38c6f780 | 1396 | diff_queue(&diff_queued_diff, one, two); |
be3cfa85 JH |
1397 | } |
1398 | ||
6b5ee137 JH |
1399 | void diff_change(struct diff_options *options, |
1400 | unsigned old_mode, unsigned new_mode, | |
77eb2720 JH |
1401 | const unsigned char *old_sha1, |
1402 | const unsigned char *new_sha1, | |
81e50eab JH |
1403 | const char *base, const char *path) |
1404 | { | |
77eb2720 | 1405 | char concatpath[PATH_MAX]; |
427dcb4b | 1406 | struct diff_filespec *one, *two; |
77eb2720 | 1407 | |
6b5ee137 | 1408 | if (options->reverse_diff) { |
7ca45252 JH |
1409 | unsigned tmp; |
1410 | const unsigned char *tmp_c; | |
1411 | tmp = old_mode; old_mode = new_mode; new_mode = tmp; | |
1412 | tmp_c = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_c; | |
1413 | } | |
427dcb4b JH |
1414 | if (!path) path = ""; |
1415 | sprintf(concatpath, "%s%s", base, path); | |
1416 | one = alloc_filespec(concatpath); | |
1417 | two = alloc_filespec(concatpath); | |
1418 | fill_filespec(one, old_sha1, old_mode); | |
1419 | fill_filespec(two, new_sha1, new_mode); | |
1420 | ||
38c6f780 | 1421 | diff_queue(&diff_queued_diff, one, two); |
77eb2720 | 1422 | } |
be3cfa85 | 1423 | |
6b5ee137 JH |
1424 | void diff_unmerge(struct diff_options *options, |
1425 | const char *path) | |
77eb2720 | 1426 | { |
6b14d7fa JH |
1427 | struct diff_filespec *one, *two; |
1428 | one = alloc_filespec(path); | |
1429 | two = alloc_filespec(path); | |
1430 | diff_queue(&diff_queued_diff, one, two); | |
86436c28 | 1431 | } |