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Commit | Line | Data |
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6973dcae JH |
1 | /* |
2 | * Copyright (C) 2005 Junio C Hamano | |
3 | */ | |
4 | #include <sys/types.h> | |
5 | #include <sys/wait.h> | |
6 | #include <signal.h> | |
7 | #include "cache.h" | |
8 | #include "quote.h" | |
9 | #include "diff.h" | |
10 | #include "diffcore.h" | |
051308f6 | 11 | #include "delta.h" |
6973dcae JH |
12 | #include "xdiff-interface.h" |
13 | ||
14 | static int use_size_cache; | |
15 | ||
96f1e58f | 16 | static int diff_detect_rename_default; |
801235c5 | 17 | static int diff_rename_limit_default = -1; |
96f1e58f | 18 | static int diff_use_color_default; |
6973dcae | 19 | |
f5b571fc TH |
20 | /* "\033[1;38;5;2xx;48;5;2xxm\0" is 23 bytes */ |
21 | static char diff_colors[][24] = { | |
f37399e6 TH |
22 | "\033[m", /* reset */ |
23 | "", /* normal */ | |
24 | "\033[1m", /* bold */ | |
25 | "\033[36m", /* cyan */ | |
26 | "\033[31m", /* red */ | |
ce436973 JK |
27 | "\033[32m", /* green */ |
28 | "\033[33m" /* yellow */ | |
cd112cef JS |
29 | }; |
30 | ||
801235c5 JH |
31 | static int parse_diff_color_slot(const char *var, int ofs) |
32 | { | |
33 | if (!strcasecmp(var+ofs, "plain")) | |
34 | return DIFF_PLAIN; | |
35 | if (!strcasecmp(var+ofs, "meta")) | |
36 | return DIFF_METAINFO; | |
37 | if (!strcasecmp(var+ofs, "frag")) | |
38 | return DIFF_FRAGINFO; | |
39 | if (!strcasecmp(var+ofs, "old")) | |
40 | return DIFF_FILE_OLD; | |
41 | if (!strcasecmp(var+ofs, "new")) | |
42 | return DIFF_FILE_NEW; | |
ce436973 JK |
43 | if (!strcasecmp(var+ofs, "commit")) |
44 | return DIFF_COMMIT; | |
801235c5 JH |
45 | die("bad config variable '%s'", var); |
46 | } | |
47 | ||
f37399e6 | 48 | static int parse_color(const char *name, int len) |
801235c5 | 49 | { |
f37399e6 TH |
50 | static const char * const color_names[] = { |
51 | "normal", "black", "red", "green", "yellow", | |
52 | "blue", "magenta", "cyan", "white" | |
53 | }; | |
f5b571fc | 54 | char *end; |
f37399e6 TH |
55 | int i; |
56 | for (i = 0; i < ARRAY_SIZE(color_names); i++) { | |
57 | const char *str = color_names[i]; | |
58 | if (!strncasecmp(name, str, len) && !str[len]) | |
59 | return i - 1; | |
60 | } | |
f5b571fc TH |
61 | i = strtol(name, &end, 10); |
62 | if (*name && !*end && i >= -1 && i <= 255) | |
63 | return i; | |
f37399e6 TH |
64 | return -2; |
65 | } | |
66 | ||
67 | static int parse_attr(const char *name, int len) | |
68 | { | |
69 | static const int attr_values[] = { 1, 2, 4, 5, 7 }; | |
70 | static const char * const attr_names[] = { | |
71 | "bold", "dim", "ul", "blink", "reverse" | |
72 | }; | |
73 | int i; | |
74 | for (i = 0; i < ARRAY_SIZE(attr_names); i++) { | |
75 | const char *str = attr_names[i]; | |
76 | if (!strncasecmp(name, str, len) && !str[len]) | |
77 | return attr_values[i]; | |
78 | } | |
79 | return -1; | |
80 | } | |
81 | ||
82 | static void parse_diff_color_value(const char *value, const char *var, char *dst) | |
83 | { | |
84 | const char *ptr = value; | |
85 | int attr = -1; | |
86 | int fg = -2; | |
87 | int bg = -2; | |
88 | ||
89 | if (!strcasecmp(value, "reset")) { | |
90 | strcpy(dst, "\033[m"); | |
91 | return; | |
92 | } | |
93 | ||
94 | /* [fg [bg]] [attr] */ | |
95 | while (*ptr) { | |
96 | const char *word = ptr; | |
97 | int val, len = 0; | |
98 | ||
99 | while (word[len] && !isspace(word[len])) | |
100 | len++; | |
101 | ||
102 | ptr = word + len; | |
103 | while (*ptr && isspace(*ptr)) | |
104 | ptr++; | |
105 | ||
106 | val = parse_color(word, len); | |
107 | if (val >= -1) { | |
108 | if (fg == -2) { | |
109 | fg = val; | |
110 | continue; | |
111 | } | |
112 | if (bg == -2) { | |
113 | bg = val; | |
114 | continue; | |
115 | } | |
116 | goto bad; | |
117 | } | |
118 | val = parse_attr(word, len); | |
119 | if (val < 0 || attr != -1) | |
120 | goto bad; | |
121 | attr = val; | |
122 | } | |
123 | ||
124 | if (attr >= 0 || fg >= 0 || bg >= 0) { | |
125 | int sep = 0; | |
126 | ||
127 | *dst++ = '\033'; | |
128 | *dst++ = '['; | |
129 | if (attr >= 0) { | |
130 | *dst++ = '0' + attr; | |
131 | sep++; | |
132 | } | |
133 | if (fg >= 0) { | |
134 | if (sep++) | |
135 | *dst++ = ';'; | |
f5b571fc TH |
136 | if (fg < 8) { |
137 | *dst++ = '3'; | |
138 | *dst++ = '0' + fg; | |
139 | } else { | |
140 | dst += sprintf(dst, "38;5;%d", fg); | |
141 | } | |
f37399e6 TH |
142 | } |
143 | if (bg >= 0) { | |
144 | if (sep++) | |
145 | *dst++ = ';'; | |
f5b571fc TH |
146 | if (bg < 8) { |
147 | *dst++ = '4'; | |
148 | *dst++ = '0' + bg; | |
149 | } else { | |
150 | dst += sprintf(dst, "48;5;%d", bg); | |
151 | } | |
f37399e6 TH |
152 | } |
153 | *dst++ = 'm'; | |
154 | } | |
155 | *dst = 0; | |
156 | return; | |
157 | bad: | |
801235c5 JH |
158 | die("bad config value '%s' for variable '%s'", value, var); |
159 | } | |
160 | ||
83ad63cf JH |
161 | /* |
162 | * These are to give UI layer defaults. | |
163 | * The core-level commands such as git-diff-files should | |
164 | * never be affected by the setting of diff.renames | |
165 | * the user happens to have in the configuration file. | |
166 | */ | |
167 | int git_diff_ui_config(const char *var, const char *value) | |
801235c5 JH |
168 | { |
169 | if (!strcmp(var, "diff.renamelimit")) { | |
170 | diff_rename_limit_default = git_config_int(var, value); | |
171 | return 0; | |
172 | } | |
173 | if (!strcmp(var, "diff.color")) { | |
174 | if (!value) | |
175 | diff_use_color_default = 1; /* bool */ | |
a0c2089c JH |
176 | else if (!strcasecmp(value, "auto")) { |
177 | diff_use_color_default = 0; | |
aa086eb8 | 178 | if (isatty(1) || (pager_in_use && pager_use_color)) { |
a0c2089c JH |
179 | char *term = getenv("TERM"); |
180 | if (term && strcmp(term, "dumb")) | |
181 | diff_use_color_default = 1; | |
182 | } | |
183 | } | |
801235c5 JH |
184 | else if (!strcasecmp(value, "never")) |
185 | diff_use_color_default = 0; | |
186 | else if (!strcasecmp(value, "always")) | |
187 | diff_use_color_default = 1; | |
188 | else | |
189 | diff_use_color_default = git_config_bool(var, value); | |
190 | return 0; | |
191 | } | |
b68ea12e EW |
192 | if (!strcmp(var, "diff.renames")) { |
193 | if (!value) | |
194 | diff_detect_rename_default = DIFF_DETECT_RENAME; | |
195 | else if (!strcasecmp(value, "copies") || | |
196 | !strcasecmp(value, "copy")) | |
197 | diff_detect_rename_default = DIFF_DETECT_COPY; | |
198 | else if (git_config_bool(var,value)) | |
199 | diff_detect_rename_default = DIFF_DETECT_RENAME; | |
200 | return 0; | |
201 | } | |
801235c5 JH |
202 | if (!strncmp(var, "diff.color.", 11)) { |
203 | int slot = parse_diff_color_slot(var, 11); | |
f37399e6 | 204 | parse_diff_color_value(value, var, diff_colors[slot]); |
801235c5 JH |
205 | return 0; |
206 | } | |
207 | return git_default_config(var, value); | |
208 | } | |
209 | ||
6973dcae JH |
210 | static char *quote_one(const char *str) |
211 | { | |
212 | int needlen; | |
213 | char *xp; | |
214 | ||
215 | if (!str) | |
216 | return NULL; | |
217 | needlen = quote_c_style(str, NULL, NULL, 0); | |
218 | if (!needlen) | |
9befac47 | 219 | return xstrdup(str); |
6973dcae JH |
220 | xp = xmalloc(needlen + 1); |
221 | quote_c_style(str, xp, NULL, 0); | |
222 | return xp; | |
223 | } | |
224 | ||
225 | static char *quote_two(const char *one, const char *two) | |
226 | { | |
227 | int need_one = quote_c_style(one, NULL, NULL, 1); | |
228 | int need_two = quote_c_style(two, NULL, NULL, 1); | |
229 | char *xp; | |
230 | ||
231 | if (need_one + need_two) { | |
232 | if (!need_one) need_one = strlen(one); | |
233 | if (!need_two) need_one = strlen(two); | |
234 | ||
235 | xp = xmalloc(need_one + need_two + 3); | |
236 | xp[0] = '"'; | |
237 | quote_c_style(one, xp + 1, NULL, 1); | |
238 | quote_c_style(two, xp + need_one + 1, NULL, 1); | |
239 | strcpy(xp + need_one + need_two + 1, "\""); | |
240 | return xp; | |
241 | } | |
242 | need_one = strlen(one); | |
243 | need_two = strlen(two); | |
244 | xp = xmalloc(need_one + need_two + 1); | |
245 | strcpy(xp, one); | |
246 | strcpy(xp + need_one, two); | |
247 | return xp; | |
248 | } | |
249 | ||
250 | static const char *external_diff(void) | |
251 | { | |
252 | static const char *external_diff_cmd = NULL; | |
253 | static int done_preparing = 0; | |
254 | ||
255 | if (done_preparing) | |
256 | return external_diff_cmd; | |
257 | external_diff_cmd = getenv("GIT_EXTERNAL_DIFF"); | |
258 | done_preparing = 1; | |
259 | return external_diff_cmd; | |
260 | } | |
261 | ||
262 | #define TEMPFILE_PATH_LEN 50 | |
263 | ||
264 | static struct diff_tempfile { | |
265 | const char *name; /* filename external diff should read from */ | |
266 | char hex[41]; | |
267 | char mode[10]; | |
268 | char tmp_path[TEMPFILE_PATH_LEN]; | |
269 | } diff_temp[2]; | |
270 | ||
271 | static int count_lines(const char *data, int size) | |
272 | { | |
273 | int count, ch, completely_empty = 1, nl_just_seen = 0; | |
274 | count = 0; | |
275 | while (0 < size--) { | |
276 | ch = *data++; | |
277 | if (ch == '\n') { | |
278 | count++; | |
279 | nl_just_seen = 1; | |
280 | completely_empty = 0; | |
281 | } | |
282 | else { | |
283 | nl_just_seen = 0; | |
284 | completely_empty = 0; | |
285 | } | |
286 | } | |
287 | if (completely_empty) | |
288 | return 0; | |
289 | if (!nl_just_seen) | |
290 | count++; /* no trailing newline */ | |
291 | return count; | |
292 | } | |
293 | ||
294 | static void print_line_count(int count) | |
295 | { | |
296 | switch (count) { | |
297 | case 0: | |
298 | printf("0,0"); | |
299 | break; | |
300 | case 1: | |
301 | printf("1"); | |
302 | break; | |
303 | default: | |
304 | printf("1,%d", count); | |
305 | break; | |
306 | } | |
307 | } | |
308 | ||
309 | static void copy_file(int prefix, const char *data, int size) | |
310 | { | |
311 | int ch, nl_just_seen = 1; | |
312 | while (0 < size--) { | |
313 | ch = *data++; | |
314 | if (nl_just_seen) | |
315 | putchar(prefix); | |
316 | putchar(ch); | |
317 | if (ch == '\n') | |
318 | nl_just_seen = 1; | |
319 | else | |
320 | nl_just_seen = 0; | |
321 | } | |
322 | if (!nl_just_seen) | |
323 | printf("\n\\ No newline at end of file\n"); | |
324 | } | |
325 | ||
326 | static void emit_rewrite_diff(const char *name_a, | |
327 | const char *name_b, | |
328 | struct diff_filespec *one, | |
329 | struct diff_filespec *two) | |
330 | { | |
331 | int lc_a, lc_b; | |
332 | diff_populate_filespec(one, 0); | |
333 | diff_populate_filespec(two, 0); | |
334 | lc_a = count_lines(one->data, one->size); | |
335 | lc_b = count_lines(two->data, two->size); | |
336 | printf("--- %s\n+++ %s\n@@ -", name_a, name_b); | |
337 | print_line_count(lc_a); | |
338 | printf(" +"); | |
339 | print_line_count(lc_b); | |
340 | printf(" @@\n"); | |
341 | if (lc_a) | |
342 | copy_file('-', one->data, one->size); | |
343 | if (lc_b) | |
344 | copy_file('+', two->data, two->size); | |
345 | } | |
346 | ||
347 | static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one) | |
348 | { | |
349 | if (!DIFF_FILE_VALID(one)) { | |
d2543b8e | 350 | mf->ptr = (char *)""; /* does not matter */ |
6973dcae JH |
351 | mf->size = 0; |
352 | return 0; | |
353 | } | |
354 | else if (diff_populate_filespec(one, 0)) | |
355 | return -1; | |
356 | mf->ptr = one->data; | |
357 | mf->size = one->size; | |
358 | return 0; | |
359 | } | |
360 | ||
f59a59e2 JS |
361 | struct diff_words_buffer { |
362 | mmfile_t text; | |
363 | long alloc; | |
364 | long current; /* output pointer */ | |
365 | int suppressed_newline; | |
366 | }; | |
367 | ||
368 | static void diff_words_append(char *line, unsigned long len, | |
369 | struct diff_words_buffer *buffer) | |
370 | { | |
371 | if (buffer->text.size + len > buffer->alloc) { | |
372 | buffer->alloc = (buffer->text.size + len) * 3 / 2; | |
373 | buffer->text.ptr = xrealloc(buffer->text.ptr, buffer->alloc); | |
374 | } | |
375 | line++; | |
376 | len--; | |
377 | memcpy(buffer->text.ptr + buffer->text.size, line, len); | |
378 | buffer->text.size += len; | |
379 | } | |
380 | ||
381 | struct diff_words_data { | |
382 | struct xdiff_emit_state xm; | |
383 | struct diff_words_buffer minus, plus; | |
384 | }; | |
385 | ||
386 | static void print_word(struct diff_words_buffer *buffer, int len, int color, | |
387 | int suppress_newline) | |
388 | { | |
389 | const char *ptr; | |
390 | int eol = 0; | |
391 | ||
392 | if (len == 0) | |
393 | return; | |
394 | ||
395 | ptr = buffer->text.ptr + buffer->current; | |
396 | buffer->current += len; | |
397 | ||
398 | if (ptr[len - 1] == '\n') { | |
399 | eol = 1; | |
400 | len--; | |
401 | } | |
402 | ||
403 | fputs(diff_get_color(1, color), stdout); | |
404 | fwrite(ptr, len, 1, stdout); | |
405 | fputs(diff_get_color(1, DIFF_RESET), stdout); | |
406 | ||
407 | if (eol) { | |
408 | if (suppress_newline) | |
409 | buffer->suppressed_newline = 1; | |
410 | else | |
411 | putchar('\n'); | |
412 | } | |
413 | } | |
414 | ||
415 | static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len) | |
416 | { | |
417 | struct diff_words_data *diff_words = priv; | |
418 | ||
419 | if (diff_words->minus.suppressed_newline) { | |
420 | if (line[0] != '+') | |
421 | putchar('\n'); | |
422 | diff_words->minus.suppressed_newline = 0; | |
423 | } | |
424 | ||
425 | len--; | |
426 | switch (line[0]) { | |
427 | case '-': | |
428 | print_word(&diff_words->minus, len, DIFF_FILE_OLD, 1); | |
429 | break; | |
430 | case '+': | |
431 | print_word(&diff_words->plus, len, DIFF_FILE_NEW, 0); | |
432 | break; | |
433 | case ' ': | |
434 | print_word(&diff_words->plus, len, DIFF_PLAIN, 0); | |
435 | diff_words->minus.current += len; | |
436 | break; | |
437 | } | |
438 | } | |
439 | ||
440 | /* this executes the word diff on the accumulated buffers */ | |
441 | static void diff_words_show(struct diff_words_data *diff_words) | |
442 | { | |
443 | xpparam_t xpp; | |
444 | xdemitconf_t xecfg; | |
445 | xdemitcb_t ecb; | |
446 | mmfile_t minus, plus; | |
447 | int i; | |
448 | ||
449 | minus.size = diff_words->minus.text.size; | |
450 | minus.ptr = xmalloc(minus.size); | |
451 | memcpy(minus.ptr, diff_words->minus.text.ptr, minus.size); | |
452 | for (i = 0; i < minus.size; i++) | |
453 | if (isspace(minus.ptr[i])) | |
454 | minus.ptr[i] = '\n'; | |
455 | diff_words->minus.current = 0; | |
456 | ||
457 | plus.size = diff_words->plus.text.size; | |
458 | plus.ptr = xmalloc(plus.size); | |
459 | memcpy(plus.ptr, diff_words->plus.text.ptr, plus.size); | |
460 | for (i = 0; i < plus.size; i++) | |
461 | if (isspace(plus.ptr[i])) | |
462 | plus.ptr[i] = '\n'; | |
463 | diff_words->plus.current = 0; | |
464 | ||
465 | xpp.flags = XDF_NEED_MINIMAL; | |
466 | xecfg.ctxlen = diff_words->minus.alloc + diff_words->plus.alloc; | |
467 | xecfg.flags = 0; | |
468 | ecb.outf = xdiff_outf; | |
469 | ecb.priv = diff_words; | |
470 | diff_words->xm.consume = fn_out_diff_words_aux; | |
471 | xdl_diff(&minus, &plus, &xpp, &xecfg, &ecb); | |
472 | ||
473 | free(minus.ptr); | |
474 | free(plus.ptr); | |
475 | diff_words->minus.text.size = diff_words->plus.text.size = 0; | |
476 | ||
477 | if (diff_words->minus.suppressed_newline) { | |
478 | putchar('\n'); | |
479 | diff_words->minus.suppressed_newline = 0; | |
480 | } | |
481 | } | |
482 | ||
6973dcae | 483 | struct emit_callback { |
cd112cef JS |
484 | struct xdiff_emit_state xm; |
485 | int nparents, color_diff; | |
6973dcae | 486 | const char **label_path; |
f59a59e2 | 487 | struct diff_words_data *diff_words; |
6973dcae JH |
488 | }; |
489 | ||
f59a59e2 JS |
490 | static void free_diff_words_data(struct emit_callback *ecbdata) |
491 | { | |
492 | if (ecbdata->diff_words) { | |
493 | /* flush buffers */ | |
494 | if (ecbdata->diff_words->minus.text.size || | |
495 | ecbdata->diff_words->plus.text.size) | |
496 | diff_words_show(ecbdata->diff_words); | |
497 | ||
498 | if (ecbdata->diff_words->minus.text.ptr) | |
499 | free (ecbdata->diff_words->minus.text.ptr); | |
500 | if (ecbdata->diff_words->plus.text.ptr) | |
501 | free (ecbdata->diff_words->plus.text.ptr); | |
502 | free(ecbdata->diff_words); | |
503 | ecbdata->diff_words = NULL; | |
504 | } | |
505 | } | |
506 | ||
ce436973 | 507 | const char *diff_get_color(int diff_use_color, enum color_diff ix) |
cd112cef JS |
508 | { |
509 | if (diff_use_color) | |
50f575fc LT |
510 | return diff_colors[ix]; |
511 | return ""; | |
cd112cef JS |
512 | } |
513 | ||
514 | static void fn_out_consume(void *priv, char *line, unsigned long len) | |
6973dcae JH |
515 | { |
516 | int i; | |
517 | struct emit_callback *ecbdata = priv; | |
ce436973 JK |
518 | const char *set = diff_get_color(ecbdata->color_diff, DIFF_METAINFO); |
519 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); | |
6973dcae JH |
520 | |
521 | if (ecbdata->label_path[0]) { | |
50f575fc LT |
522 | printf("%s--- %s%s\n", set, ecbdata->label_path[0], reset); |
523 | printf("%s+++ %s%s\n", set, ecbdata->label_path[1], reset); | |
6973dcae JH |
524 | ecbdata->label_path[0] = ecbdata->label_path[1] = NULL; |
525 | } | |
cd112cef JS |
526 | |
527 | /* This is not really necessary for now because | |
528 | * this codepath only deals with two-way diffs. | |
529 | */ | |
530 | for (i = 0; i < len && line[i] == '@'; i++) | |
531 | ; | |
532 | if (2 <= i && i < len && line[i] == ' ') { | |
533 | ecbdata->nparents = i - 1; | |
ce436973 | 534 | set = diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO); |
cd112cef JS |
535 | } |
536 | else if (len < ecbdata->nparents) | |
50f575fc | 537 | set = reset; |
cd112cef JS |
538 | else { |
539 | int nparents = ecbdata->nparents; | |
540 | int color = DIFF_PLAIN; | |
f59a59e2 JS |
541 | if (ecbdata->diff_words && nparents != 1) |
542 | /* fall back to normal diff */ | |
543 | free_diff_words_data(ecbdata); | |
544 | if (ecbdata->diff_words) { | |
545 | if (line[0] == '-') { | |
546 | diff_words_append(line, len, | |
547 | &ecbdata->diff_words->minus); | |
548 | return; | |
549 | } else if (line[0] == '+') { | |
550 | diff_words_append(line, len, | |
551 | &ecbdata->diff_words->plus); | |
552 | return; | |
553 | } | |
554 | if (ecbdata->diff_words->minus.text.size || | |
555 | ecbdata->diff_words->plus.text.size) | |
556 | diff_words_show(ecbdata->diff_words); | |
557 | line++; | |
558 | len--; | |
559 | } else | |
560 | for (i = 0; i < nparents && len; i++) { | |
561 | if (line[i] == '-') | |
562 | color = DIFF_FILE_OLD; | |
563 | else if (line[i] == '+') | |
564 | color = DIFF_FILE_NEW; | |
565 | } | |
ce436973 | 566 | set = diff_get_color(ecbdata->color_diff, color); |
cd112cef | 567 | } |
50f575fc LT |
568 | if (len > 0 && line[len-1] == '\n') |
569 | len--; | |
c9c95bbc SF |
570 | fputs (set, stdout); |
571 | fwrite (line, len, 1, stdout); | |
572 | puts (reset); | |
6973dcae JH |
573 | } |
574 | ||
575 | static char *pprint_rename(const char *a, const char *b) | |
576 | { | |
577 | const char *old = a; | |
578 | const char *new = b; | |
579 | char *name = NULL; | |
580 | int pfx_length, sfx_length; | |
581 | int len_a = strlen(a); | |
582 | int len_b = strlen(b); | |
583 | ||
584 | /* Find common prefix */ | |
585 | pfx_length = 0; | |
586 | while (*old && *new && *old == *new) { | |
587 | if (*old == '/') | |
588 | pfx_length = old - a + 1; | |
589 | old++; | |
590 | new++; | |
591 | } | |
592 | ||
593 | /* Find common suffix */ | |
594 | old = a + len_a; | |
595 | new = b + len_b; | |
596 | sfx_length = 0; | |
597 | while (a <= old && b <= new && *old == *new) { | |
598 | if (*old == '/') | |
599 | sfx_length = len_a - (old - a); | |
600 | old--; | |
601 | new--; | |
602 | } | |
603 | ||
604 | /* | |
605 | * pfx{mid-a => mid-b}sfx | |
606 | * {pfx-a => pfx-b}sfx | |
607 | * pfx{sfx-a => sfx-b} | |
608 | * name-a => name-b | |
609 | */ | |
610 | if (pfx_length + sfx_length) { | |
cc908b82 JH |
611 | int a_midlen = len_a - pfx_length - sfx_length; |
612 | int b_midlen = len_b - pfx_length - sfx_length; | |
613 | if (a_midlen < 0) a_midlen = 0; | |
614 | if (b_midlen < 0) b_midlen = 0; | |
615 | ||
e3008464 | 616 | name = xmalloc(pfx_length + a_midlen + b_midlen + sfx_length + 7); |
6973dcae JH |
617 | sprintf(name, "%.*s{%.*s => %.*s}%s", |
618 | pfx_length, a, | |
cc908b82 JH |
619 | a_midlen, a + pfx_length, |
620 | b_midlen, b + pfx_length, | |
6973dcae JH |
621 | a + len_a - sfx_length); |
622 | } | |
623 | else { | |
624 | name = xmalloc(len_a + len_b + 5); | |
625 | sprintf(name, "%s => %s", a, b); | |
626 | } | |
627 | return name; | |
628 | } | |
629 | ||
630 | struct diffstat_t { | |
631 | struct xdiff_emit_state xm; | |
632 | ||
633 | int nr; | |
634 | int alloc; | |
635 | struct diffstat_file { | |
636 | char *name; | |
637 | unsigned is_unmerged:1; | |
638 | unsigned is_binary:1; | |
639 | unsigned is_renamed:1; | |
640 | unsigned int added, deleted; | |
641 | } **files; | |
642 | }; | |
643 | ||
644 | static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat, | |
645 | const char *name_a, | |
646 | const char *name_b) | |
647 | { | |
648 | struct diffstat_file *x; | |
649 | x = xcalloc(sizeof (*x), 1); | |
650 | if (diffstat->nr == diffstat->alloc) { | |
651 | diffstat->alloc = alloc_nr(diffstat->alloc); | |
652 | diffstat->files = xrealloc(diffstat->files, | |
653 | diffstat->alloc * sizeof(x)); | |
654 | } | |
655 | diffstat->files[diffstat->nr++] = x; | |
656 | if (name_b) { | |
657 | x->name = pprint_rename(name_a, name_b); | |
658 | x->is_renamed = 1; | |
659 | } | |
660 | else | |
9befac47 | 661 | x->name = xstrdup(name_a); |
6973dcae JH |
662 | return x; |
663 | } | |
664 | ||
665 | static void diffstat_consume(void *priv, char *line, unsigned long len) | |
666 | { | |
667 | struct diffstat_t *diffstat = priv; | |
668 | struct diffstat_file *x = diffstat->files[diffstat->nr - 1]; | |
669 | ||
670 | if (line[0] == '+') | |
671 | x->added++; | |
672 | else if (line[0] == '-') | |
673 | x->deleted++; | |
674 | } | |
675 | ||
676 | static const char pluses[] = "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"; | |
677 | static const char minuses[]= "----------------------------------------------------------------------"; | |
698ce6f8 | 678 | const char mime_boundary_leader[] = "------------"; |
6973dcae JH |
679 | |
680 | static void show_stats(struct diffstat_t* data) | |
681 | { | |
6973dcae JH |
682 | int i, len, add, del, total, adds = 0, dels = 0; |
683 | int max, max_change = 0, max_len = 0; | |
684 | int total_files = data->nr; | |
685 | ||
686 | if (data->nr == 0) | |
687 | return; | |
688 | ||
689 | for (i = 0; i < data->nr; i++) { | |
690 | struct diffstat_file *file = data->files[i]; | |
691 | ||
692 | len = strlen(file->name); | |
693 | if (max_len < len) | |
694 | max_len = len; | |
695 | ||
696 | if (file->is_binary || file->is_unmerged) | |
697 | continue; | |
698 | if (max_change < file->added + file->deleted) | |
699 | max_change = file->added + file->deleted; | |
700 | } | |
701 | ||
702 | for (i = 0; i < data->nr; i++) { | |
d2543b8e | 703 | const char *prefix = ""; |
6973dcae JH |
704 | char *name = data->files[i]->name; |
705 | int added = data->files[i]->added; | |
706 | int deleted = data->files[i]->deleted; | |
707 | ||
708 | if (0 < (len = quote_c_style(name, NULL, NULL, 0))) { | |
709 | char *qname = xmalloc(len + 1); | |
710 | quote_c_style(name, qname, NULL, 0); | |
711 | free(name); | |
712 | data->files[i]->name = name = qname; | |
713 | } | |
714 | ||
715 | /* | |
716 | * "scale" the filename | |
717 | */ | |
718 | len = strlen(name); | |
719 | max = max_len; | |
720 | if (max > 50) | |
721 | max = 50; | |
722 | if (len > max) { | |
723 | char *slash; | |
724 | prefix = "..."; | |
725 | max -= 3; | |
726 | name += len - max; | |
727 | slash = strchr(name, '/'); | |
728 | if (slash) | |
729 | name = slash; | |
730 | } | |
731 | len = max; | |
732 | ||
733 | /* | |
734 | * scale the add/delete | |
735 | */ | |
736 | max = max_change; | |
737 | if (max + len > 70) | |
738 | max = 70 - len; | |
739 | ||
740 | if (data->files[i]->is_binary) { | |
741 | printf(" %s%-*s | Bin\n", prefix, len, name); | |
742 | goto free_diffstat_file; | |
743 | } | |
744 | else if (data->files[i]->is_unmerged) { | |
745 | printf(" %s%-*s | Unmerged\n", prefix, len, name); | |
746 | goto free_diffstat_file; | |
747 | } | |
748 | else if (!data->files[i]->is_renamed && | |
749 | (added + deleted == 0)) { | |
750 | total_files--; | |
751 | goto free_diffstat_file; | |
752 | } | |
753 | ||
754 | add = added; | |
755 | del = deleted; | |
756 | total = add + del; | |
757 | adds += add; | |
758 | dels += del; | |
759 | ||
760 | if (max_change > 0) { | |
761 | total = (total * max + max_change / 2) / max_change; | |
762 | add = (add * max + max_change / 2) / max_change; | |
763 | del = total - add; | |
764 | } | |
765 | printf(" %s%-*s |%5d %.*s%.*s\n", prefix, | |
766 | len, name, added + deleted, | |
767 | add, pluses, del, minuses); | |
768 | free_diffstat_file: | |
769 | free(data->files[i]->name); | |
770 | free(data->files[i]); | |
771 | } | |
772 | free(data->files); | |
773 | printf(" %d files changed, %d insertions(+), %d deletions(-)\n", | |
774 | total_files, adds, dels); | |
775 | } | |
776 | ||
88246898 JS |
777 | struct checkdiff_t { |
778 | struct xdiff_emit_state xm; | |
779 | const char *filename; | |
780 | int lineno; | |
781 | }; | |
782 | ||
783 | static void checkdiff_consume(void *priv, char *line, unsigned long len) | |
784 | { | |
785 | struct checkdiff_t *data = priv; | |
786 | ||
787 | if (line[0] == '+') { | |
788 | int i, spaces = 0; | |
789 | ||
790 | data->lineno++; | |
791 | ||
792 | /* check space before tab */ | |
793 | for (i = 1; i < len && (line[i] == ' ' || line[i] == '\t'); i++) | |
794 | if (line[i] == ' ') | |
795 | spaces++; | |
796 | if (line[i - 1] == '\t' && spaces) | |
797 | printf("%s:%d: space before tab:%.*s\n", | |
798 | data->filename, data->lineno, (int)len, line); | |
799 | ||
800 | /* check white space at line end */ | |
801 | if (line[len - 1] == '\n') | |
802 | len--; | |
803 | if (isspace(line[len - 1])) | |
804 | printf("%s:%d: white space at end: %.*s\n", | |
805 | data->filename, data->lineno, (int)len, line); | |
806 | } else if (line[0] == ' ') | |
807 | data->lineno++; | |
808 | else if (line[0] == '@') { | |
809 | char *plus = strchr(line, '+'); | |
810 | if (plus) | |
9e848163 | 811 | data->lineno = strtol(plus, NULL, 10); |
88246898 JS |
812 | else |
813 | die("invalid diff"); | |
814 | } | |
815 | } | |
816 | ||
0660626c JH |
817 | static unsigned char *deflate_it(char *data, |
818 | unsigned long size, | |
819 | unsigned long *result_size) | |
051308f6 | 820 | { |
0660626c JH |
821 | int bound; |
822 | unsigned char *deflated; | |
823 | z_stream stream; | |
824 | ||
825 | memset(&stream, 0, sizeof(stream)); | |
12f6c308 | 826 | deflateInit(&stream, zlib_compression_level); |
0660626c JH |
827 | bound = deflateBound(&stream, size); |
828 | deflated = xmalloc(bound); | |
829 | stream.next_out = deflated; | |
830 | stream.avail_out = bound; | |
831 | ||
832 | stream.next_in = (unsigned char *)data; | |
833 | stream.avail_in = size; | |
834 | while (deflate(&stream, Z_FINISH) == Z_OK) | |
835 | ; /* nothing */ | |
836 | deflateEnd(&stream); | |
837 | *result_size = stream.total_out; | |
838 | return deflated; | |
051308f6 JH |
839 | } |
840 | ||
d4c452f0 | 841 | static void emit_binary_diff_body(mmfile_t *one, mmfile_t *two) |
051308f6 | 842 | { |
0660626c JH |
843 | void *cp; |
844 | void *delta; | |
845 | void *deflated; | |
846 | void *data; | |
847 | unsigned long orig_size; | |
848 | unsigned long delta_size; | |
849 | unsigned long deflate_size; | |
850 | unsigned long data_size; | |
051308f6 | 851 | |
0660626c JH |
852 | /* We could do deflated delta, or we could do just deflated two, |
853 | * whichever is smaller. | |
051308f6 | 854 | */ |
0660626c JH |
855 | delta = NULL; |
856 | deflated = deflate_it(two->ptr, two->size, &deflate_size); | |
857 | if (one->size && two->size) { | |
858 | delta = diff_delta(one->ptr, one->size, | |
859 | two->ptr, two->size, | |
860 | &delta_size, deflate_size); | |
861 | if (delta) { | |
862 | void *to_free = delta; | |
863 | orig_size = delta_size; | |
864 | delta = deflate_it(delta, delta_size, &delta_size); | |
865 | free(to_free); | |
051308f6 JH |
866 | } |
867 | } | |
051308f6 | 868 | |
0660626c JH |
869 | if (delta && delta_size < deflate_size) { |
870 | printf("delta %lu\n", orig_size); | |
871 | free(deflated); | |
872 | data = delta; | |
873 | data_size = delta_size; | |
874 | } | |
875 | else { | |
876 | printf("literal %lu\n", two->size); | |
877 | free(delta); | |
878 | data = deflated; | |
879 | data_size = deflate_size; | |
880 | } | |
051308f6 | 881 | |
0660626c JH |
882 | /* emit data encoded in base85 */ |
883 | cp = data; | |
884 | while (data_size) { | |
885 | int bytes = (52 < data_size) ? 52 : data_size; | |
051308f6 | 886 | char line[70]; |
0660626c | 887 | data_size -= bytes; |
051308f6 JH |
888 | if (bytes <= 26) |
889 | line[0] = bytes + 'A' - 1; | |
890 | else | |
891 | line[0] = bytes - 26 + 'a' - 1; | |
892 | encode_85(line + 1, cp, bytes); | |
1d7f171c | 893 | cp = (char *) cp + bytes; |
051308f6 JH |
894 | puts(line); |
895 | } | |
896 | printf("\n"); | |
0660626c | 897 | free(data); |
051308f6 JH |
898 | } |
899 | ||
d4c452f0 JH |
900 | static void emit_binary_diff(mmfile_t *one, mmfile_t *two) |
901 | { | |
902 | printf("GIT binary patch\n"); | |
903 | emit_binary_diff_body(one, two); | |
904 | emit_binary_diff_body(two, one); | |
905 | } | |
906 | ||
6973dcae JH |
907 | #define FIRST_FEW_BYTES 8000 |
908 | static int mmfile_is_binary(mmfile_t *mf) | |
909 | { | |
910 | long sz = mf->size; | |
911 | if (FIRST_FEW_BYTES < sz) | |
912 | sz = FIRST_FEW_BYTES; | |
8c0b2bb6 | 913 | return !!memchr(mf->ptr, 0, sz); |
6973dcae JH |
914 | } |
915 | ||
916 | static void builtin_diff(const char *name_a, | |
917 | const char *name_b, | |
918 | struct diff_filespec *one, | |
919 | struct diff_filespec *two, | |
920 | const char *xfrm_msg, | |
051308f6 | 921 | struct diff_options *o, |
6973dcae JH |
922 | int complete_rewrite) |
923 | { | |
924 | mmfile_t mf1, mf2; | |
925 | const char *lbl[2]; | |
926 | char *a_one, *b_two; | |
ce436973 JK |
927 | const char *set = diff_get_color(o->color_diff, DIFF_METAINFO); |
928 | const char *reset = diff_get_color(o->color_diff, DIFF_RESET); | |
6973dcae JH |
929 | |
930 | a_one = quote_two("a/", name_a); | |
931 | b_two = quote_two("b/", name_b); | |
932 | lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null"; | |
933 | lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null"; | |
50f575fc | 934 | printf("%sdiff --git %s %s%s\n", set, a_one, b_two, reset); |
6973dcae JH |
935 | if (lbl[0][0] == '/') { |
936 | /* /dev/null */ | |
50f575fc LT |
937 | printf("%snew file mode %06o%s\n", set, two->mode, reset); |
938 | if (xfrm_msg && xfrm_msg[0]) | |
939 | printf("%s%s%s\n", set, xfrm_msg, reset); | |
6973dcae JH |
940 | } |
941 | else if (lbl[1][0] == '/') { | |
50f575fc LT |
942 | printf("%sdeleted file mode %06o%s\n", set, one->mode, reset); |
943 | if (xfrm_msg && xfrm_msg[0]) | |
944 | printf("%s%s%s\n", set, xfrm_msg, reset); | |
6973dcae JH |
945 | } |
946 | else { | |
947 | if (one->mode != two->mode) { | |
50f575fc LT |
948 | printf("%sold mode %06o%s\n", set, one->mode, reset); |
949 | printf("%snew mode %06o%s\n", set, two->mode, reset); | |
cd112cef | 950 | } |
50f575fc LT |
951 | if (xfrm_msg && xfrm_msg[0]) |
952 | printf("%s%s%s\n", set, xfrm_msg, reset); | |
6973dcae JH |
953 | /* |
954 | * we do not run diff between different kind | |
955 | * of objects. | |
956 | */ | |
957 | if ((one->mode ^ two->mode) & S_IFMT) | |
958 | goto free_ab_and_return; | |
959 | if (complete_rewrite) { | |
960 | emit_rewrite_diff(name_a, name_b, one, two); | |
961 | goto free_ab_and_return; | |
962 | } | |
963 | } | |
964 | ||
965 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
966 | die("unable to read files to diff"); | |
967 | ||
6d64ea96 | 968 | if (!o->text && (mmfile_is_binary(&mf1) || mmfile_is_binary(&mf2))) { |
0660626c JH |
969 | /* Quite common confusing case */ |
970 | if (mf1.size == mf2.size && | |
971 | !memcmp(mf1.ptr, mf2.ptr, mf1.size)) | |
972 | goto free_ab_and_return; | |
973 | if (o->binary) | |
051308f6 JH |
974 | emit_binary_diff(&mf1, &mf2); |
975 | else | |
976 | printf("Binary files %s and %s differ\n", | |
977 | lbl[0], lbl[1]); | |
978 | } | |
6973dcae JH |
979 | else { |
980 | /* Crazy xdl interfaces.. */ | |
981 | const char *diffopts = getenv("GIT_DIFF_OPTS"); | |
982 | xpparam_t xpp; | |
983 | xdemitconf_t xecfg; | |
984 | xdemitcb_t ecb; | |
985 | struct emit_callback ecbdata; | |
986 | ||
cd112cef | 987 | memset(&ecbdata, 0, sizeof(ecbdata)); |
6973dcae | 988 | ecbdata.label_path = lbl; |
cd112cef | 989 | ecbdata.color_diff = o->color_diff; |
0d21efa5 | 990 | xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts; |
ee1e5412 | 991 | xecfg.ctxlen = o->context; |
6973dcae JH |
992 | xecfg.flags = XDL_EMIT_FUNCNAMES; |
993 | if (!diffopts) | |
994 | ; | |
995 | else if (!strncmp(diffopts, "--unified=", 10)) | |
996 | xecfg.ctxlen = strtoul(diffopts + 10, NULL, 10); | |
997 | else if (!strncmp(diffopts, "-u", 2)) | |
998 | xecfg.ctxlen = strtoul(diffopts + 2, NULL, 10); | |
cd112cef | 999 | ecb.outf = xdiff_outf; |
6973dcae | 1000 | ecb.priv = &ecbdata; |
cd112cef | 1001 | ecbdata.xm.consume = fn_out_consume; |
f59a59e2 JS |
1002 | if (o->color_diff_words) |
1003 | ecbdata.diff_words = | |
1004 | xcalloc(1, sizeof(struct diff_words_data)); | |
6973dcae | 1005 | xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); |
f59a59e2 JS |
1006 | if (o->color_diff_words) |
1007 | free_diff_words_data(&ecbdata); | |
6973dcae JH |
1008 | } |
1009 | ||
1010 | free_ab_and_return: | |
1011 | free(a_one); | |
1012 | free(b_two); | |
1013 | return; | |
1014 | } | |
1015 | ||
1016 | static void builtin_diffstat(const char *name_a, const char *name_b, | |
1017 | struct diff_filespec *one, | |
1018 | struct diff_filespec *two, | |
710158e3 | 1019 | struct diffstat_t *diffstat, |
0d21efa5 | 1020 | struct diff_options *o, |
710158e3 | 1021 | int complete_rewrite) |
6973dcae JH |
1022 | { |
1023 | mmfile_t mf1, mf2; | |
1024 | struct diffstat_file *data; | |
1025 | ||
1026 | data = diffstat_add(diffstat, name_a, name_b); | |
1027 | ||
1028 | if (!one || !two) { | |
1029 | data->is_unmerged = 1; | |
1030 | return; | |
1031 | } | |
710158e3 JH |
1032 | if (complete_rewrite) { |
1033 | diff_populate_filespec(one, 0); | |
1034 | diff_populate_filespec(two, 0); | |
1035 | data->deleted = count_lines(one->data, one->size); | |
1036 | data->added = count_lines(two->data, two->size); | |
1037 | return; | |
1038 | } | |
6973dcae JH |
1039 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) |
1040 | die("unable to read files to diff"); | |
1041 | ||
1042 | if (mmfile_is_binary(&mf1) || mmfile_is_binary(&mf2)) | |
1043 | data->is_binary = 1; | |
1044 | else { | |
1045 | /* Crazy xdl interfaces.. */ | |
1046 | xpparam_t xpp; | |
1047 | xdemitconf_t xecfg; | |
1048 | xdemitcb_t ecb; | |
1049 | ||
0d21efa5 | 1050 | xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts; |
6973dcae JH |
1051 | xecfg.ctxlen = 0; |
1052 | xecfg.flags = 0; | |
1053 | ecb.outf = xdiff_outf; | |
1054 | ecb.priv = diffstat; | |
1055 | xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); | |
1056 | } | |
1057 | } | |
1058 | ||
88246898 JS |
1059 | static void builtin_checkdiff(const char *name_a, const char *name_b, |
1060 | struct diff_filespec *one, | |
1061 | struct diff_filespec *two) | |
1062 | { | |
1063 | mmfile_t mf1, mf2; | |
1064 | struct checkdiff_t data; | |
1065 | ||
1066 | if (!two) | |
1067 | return; | |
1068 | ||
1069 | memset(&data, 0, sizeof(data)); | |
1070 | data.xm.consume = checkdiff_consume; | |
1071 | data.filename = name_b ? name_b : name_a; | |
1072 | data.lineno = 0; | |
1073 | ||
1074 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
1075 | die("unable to read files to diff"); | |
1076 | ||
1077 | if (mmfile_is_binary(&mf2)) | |
1078 | return; | |
1079 | else { | |
1080 | /* Crazy xdl interfaces.. */ | |
1081 | xpparam_t xpp; | |
1082 | xdemitconf_t xecfg; | |
1083 | xdemitcb_t ecb; | |
1084 | ||
1085 | xpp.flags = XDF_NEED_MINIMAL; | |
1086 | xecfg.ctxlen = 0; | |
1087 | xecfg.flags = 0; | |
1088 | ecb.outf = xdiff_outf; | |
1089 | ecb.priv = &data; | |
1090 | xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); | |
1091 | } | |
1092 | } | |
1093 | ||
6973dcae JH |
1094 | struct diff_filespec *alloc_filespec(const char *path) |
1095 | { | |
1096 | int namelen = strlen(path); | |
1097 | struct diff_filespec *spec = xmalloc(sizeof(*spec) + namelen + 1); | |
1098 | ||
1099 | memset(spec, 0, sizeof(*spec)); | |
1100 | spec->path = (char *)(spec + 1); | |
1101 | memcpy(spec->path, path, namelen+1); | |
1102 | return spec; | |
1103 | } | |
1104 | ||
1105 | void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1, | |
1106 | unsigned short mode) | |
1107 | { | |
1108 | if (mode) { | |
1109 | spec->mode = canon_mode(mode); | |
e702496e | 1110 | hashcpy(spec->sha1, sha1); |
0bef57ee | 1111 | spec->sha1_valid = !is_null_sha1(sha1); |
6973dcae JH |
1112 | } |
1113 | } | |
1114 | ||
1115 | /* | |
1116 | * Given a name and sha1 pair, if the dircache tells us the file in | |
1117 | * the work tree has that object contents, return true, so that | |
1118 | * prepare_temp_file() does not have to inflate and extract. | |
1119 | */ | |
1120 | static int work_tree_matches(const char *name, const unsigned char *sha1) | |
1121 | { | |
1122 | struct cache_entry *ce; | |
1123 | struct stat st; | |
1124 | int pos, len; | |
1125 | ||
1126 | /* We do not read the cache ourselves here, because the | |
1127 | * benchmark with my previous version that always reads cache | |
1128 | * shows that it makes things worse for diff-tree comparing | |
1129 | * two linux-2.6 kernel trees in an already checked out work | |
1130 | * tree. This is because most diff-tree comparisons deal with | |
1131 | * only a small number of files, while reading the cache is | |
1132 | * expensive for a large project, and its cost outweighs the | |
1133 | * savings we get by not inflating the object to a temporary | |
1134 | * file. Practically, this code only helps when we are used | |
1135 | * by diff-cache --cached, which does read the cache before | |
1136 | * calling us. | |
1137 | */ | |
1138 | if (!active_cache) | |
1139 | return 0; | |
1140 | ||
1141 | len = strlen(name); | |
1142 | pos = cache_name_pos(name, len); | |
1143 | if (pos < 0) | |
1144 | return 0; | |
1145 | ce = active_cache[pos]; | |
1146 | if ((lstat(name, &st) < 0) || | |
1147 | !S_ISREG(st.st_mode) || /* careful! */ | |
1148 | ce_match_stat(ce, &st, 0) || | |
a89fccd2 | 1149 | hashcmp(sha1, ce->sha1)) |
6973dcae JH |
1150 | return 0; |
1151 | /* we return 1 only when we can stat, it is a regular file, | |
1152 | * stat information matches, and sha1 recorded in the cache | |
1153 | * matches. I.e. we know the file in the work tree really is | |
1154 | * the same as the <name, sha1> pair. | |
1155 | */ | |
1156 | return 1; | |
1157 | } | |
1158 | ||
1159 | static struct sha1_size_cache { | |
1160 | unsigned char sha1[20]; | |
1161 | unsigned long size; | |
1162 | } **sha1_size_cache; | |
1163 | static int sha1_size_cache_nr, sha1_size_cache_alloc; | |
1164 | ||
1165 | static struct sha1_size_cache *locate_size_cache(unsigned char *sha1, | |
1166 | int find_only, | |
1167 | unsigned long size) | |
1168 | { | |
1169 | int first, last; | |
1170 | struct sha1_size_cache *e; | |
1171 | ||
1172 | first = 0; | |
1173 | last = sha1_size_cache_nr; | |
1174 | while (last > first) { | |
1175 | int cmp, next = (last + first) >> 1; | |
1176 | e = sha1_size_cache[next]; | |
a89fccd2 | 1177 | cmp = hashcmp(e->sha1, sha1); |
6973dcae JH |
1178 | if (!cmp) |
1179 | return e; | |
1180 | if (cmp < 0) { | |
1181 | last = next; | |
1182 | continue; | |
1183 | } | |
1184 | first = next+1; | |
1185 | } | |
1186 | /* not found */ | |
1187 | if (find_only) | |
1188 | return NULL; | |
1189 | /* insert to make it at "first" */ | |
1190 | if (sha1_size_cache_alloc <= sha1_size_cache_nr) { | |
1191 | sha1_size_cache_alloc = alloc_nr(sha1_size_cache_alloc); | |
1192 | sha1_size_cache = xrealloc(sha1_size_cache, | |
1193 | sha1_size_cache_alloc * | |
1194 | sizeof(*sha1_size_cache)); | |
1195 | } | |
1196 | sha1_size_cache_nr++; | |
1197 | if (first < sha1_size_cache_nr) | |
1198 | memmove(sha1_size_cache + first + 1, sha1_size_cache + first, | |
1199 | (sha1_size_cache_nr - first - 1) * | |
1200 | sizeof(*sha1_size_cache)); | |
1201 | e = xmalloc(sizeof(struct sha1_size_cache)); | |
1202 | sha1_size_cache[first] = e; | |
e702496e | 1203 | hashcpy(e->sha1, sha1); |
6973dcae JH |
1204 | e->size = size; |
1205 | return e; | |
1206 | } | |
1207 | ||
1208 | /* | |
1209 | * While doing rename detection and pickaxe operation, we may need to | |
1210 | * grab the data for the blob (or file) for our own in-core comparison. | |
1211 | * diff_filespec has data and size fields for this purpose. | |
1212 | */ | |
1213 | int diff_populate_filespec(struct diff_filespec *s, int size_only) | |
1214 | { | |
1215 | int err = 0; | |
1216 | if (!DIFF_FILE_VALID(s)) | |
1217 | die("internal error: asking to populate invalid file."); | |
1218 | if (S_ISDIR(s->mode)) | |
1219 | return -1; | |
1220 | ||
1221 | if (!use_size_cache) | |
1222 | size_only = 0; | |
1223 | ||
1224 | if (s->data) | |
1225 | return err; | |
1226 | if (!s->sha1_valid || | |
1227 | work_tree_matches(s->path, s->sha1)) { | |
1228 | struct stat st; | |
1229 | int fd; | |
1230 | if (lstat(s->path, &st) < 0) { | |
1231 | if (errno == ENOENT) { | |
1232 | err_empty: | |
1233 | err = -1; | |
1234 | empty: | |
d2543b8e | 1235 | s->data = (char *)""; |
6973dcae JH |
1236 | s->size = 0; |
1237 | return err; | |
1238 | } | |
1239 | } | |
1240 | s->size = st.st_size; | |
1241 | if (!s->size) | |
1242 | goto empty; | |
1243 | if (size_only) | |
1244 | return 0; | |
1245 | if (S_ISLNK(st.st_mode)) { | |
1246 | int ret; | |
1247 | s->data = xmalloc(s->size); | |
1248 | s->should_free = 1; | |
1249 | ret = readlink(s->path, s->data, s->size); | |
1250 | if (ret < 0) { | |
1251 | free(s->data); | |
1252 | goto err_empty; | |
1253 | } | |
1254 | return 0; | |
1255 | } | |
1256 | fd = open(s->path, O_RDONLY); | |
1257 | if (fd < 0) | |
1258 | goto err_empty; | |
1259 | s->data = mmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0); | |
1260 | close(fd); | |
1261 | if (s->data == MAP_FAILED) | |
1262 | goto err_empty; | |
1263 | s->should_munmap = 1; | |
1264 | } | |
1265 | else { | |
1266 | char type[20]; | |
1267 | struct sha1_size_cache *e; | |
1268 | ||
1269 | if (size_only) { | |
1270 | e = locate_size_cache(s->sha1, 1, 0); | |
1271 | if (e) { | |
1272 | s->size = e->size; | |
1273 | return 0; | |
1274 | } | |
1275 | if (!sha1_object_info(s->sha1, type, &s->size)) | |
1276 | locate_size_cache(s->sha1, 0, s->size); | |
1277 | } | |
1278 | else { | |
1279 | s->data = read_sha1_file(s->sha1, type, &s->size); | |
1280 | s->should_free = 1; | |
1281 | } | |
1282 | } | |
1283 | return 0; | |
1284 | } | |
1285 | ||
1286 | void diff_free_filespec_data(struct diff_filespec *s) | |
1287 | { | |
1288 | if (s->should_free) | |
1289 | free(s->data); | |
1290 | else if (s->should_munmap) | |
1291 | munmap(s->data, s->size); | |
1292 | s->should_free = s->should_munmap = 0; | |
1293 | s->data = NULL; | |
1294 | free(s->cnt_data); | |
1295 | s->cnt_data = NULL; | |
1296 | } | |
1297 | ||
1298 | static void prep_temp_blob(struct diff_tempfile *temp, | |
1299 | void *blob, | |
1300 | unsigned long size, | |
1301 | const unsigned char *sha1, | |
1302 | int mode) | |
1303 | { | |
1304 | int fd; | |
1305 | ||
1306 | fd = git_mkstemp(temp->tmp_path, TEMPFILE_PATH_LEN, ".diff_XXXXXX"); | |
1307 | if (fd < 0) | |
1308 | die("unable to create temp-file"); | |
1309 | if (write(fd, blob, size) != size) | |
1310 | die("unable to write temp-file"); | |
1311 | close(fd); | |
1312 | temp->name = temp->tmp_path; | |
1313 | strcpy(temp->hex, sha1_to_hex(sha1)); | |
1314 | temp->hex[40] = 0; | |
1315 | sprintf(temp->mode, "%06o", mode); | |
1316 | } | |
1317 | ||
1318 | static void prepare_temp_file(const char *name, | |
1319 | struct diff_tempfile *temp, | |
1320 | struct diff_filespec *one) | |
1321 | { | |
1322 | if (!DIFF_FILE_VALID(one)) { | |
1323 | not_a_valid_file: | |
1324 | /* A '-' entry produces this for file-2, and | |
1325 | * a '+' entry produces this for file-1. | |
1326 | */ | |
1327 | temp->name = "/dev/null"; | |
1328 | strcpy(temp->hex, "."); | |
1329 | strcpy(temp->mode, "."); | |
1330 | return; | |
1331 | } | |
1332 | ||
1333 | if (!one->sha1_valid || | |
1334 | work_tree_matches(name, one->sha1)) { | |
1335 | struct stat st; | |
1336 | if (lstat(name, &st) < 0) { | |
1337 | if (errno == ENOENT) | |
1338 | goto not_a_valid_file; | |
1339 | die("stat(%s): %s", name, strerror(errno)); | |
1340 | } | |
1341 | if (S_ISLNK(st.st_mode)) { | |
1342 | int ret; | |
1343 | char buf[PATH_MAX + 1]; /* ought to be SYMLINK_MAX */ | |
1344 | if (sizeof(buf) <= st.st_size) | |
1345 | die("symlink too long: %s", name); | |
1346 | ret = readlink(name, buf, st.st_size); | |
1347 | if (ret < 0) | |
1348 | die("readlink(%s)", name); | |
1349 | prep_temp_blob(temp, buf, st.st_size, | |
1350 | (one->sha1_valid ? | |
1351 | one->sha1 : null_sha1), | |
1352 | (one->sha1_valid ? | |
1353 | one->mode : S_IFLNK)); | |
1354 | } | |
1355 | else { | |
1356 | /* we can borrow from the file in the work tree */ | |
1357 | temp->name = name; | |
1358 | if (!one->sha1_valid) | |
1359 | strcpy(temp->hex, sha1_to_hex(null_sha1)); | |
1360 | else | |
1361 | strcpy(temp->hex, sha1_to_hex(one->sha1)); | |
1362 | /* Even though we may sometimes borrow the | |
1363 | * contents from the work tree, we always want | |
1364 | * one->mode. mode is trustworthy even when | |
1365 | * !(one->sha1_valid), as long as | |
1366 | * DIFF_FILE_VALID(one). | |
1367 | */ | |
1368 | sprintf(temp->mode, "%06o", one->mode); | |
1369 | } | |
1370 | return; | |
1371 | } | |
1372 | else { | |
1373 | if (diff_populate_filespec(one, 0)) | |
1374 | die("cannot read data blob for %s", one->path); | |
1375 | prep_temp_blob(temp, one->data, one->size, | |
1376 | one->sha1, one->mode); | |
1377 | } | |
1378 | } | |
1379 | ||
1380 | static void remove_tempfile(void) | |
1381 | { | |
1382 | int i; | |
1383 | ||
1384 | for (i = 0; i < 2; i++) | |
1385 | if (diff_temp[i].name == diff_temp[i].tmp_path) { | |
1386 | unlink(diff_temp[i].name); | |
1387 | diff_temp[i].name = NULL; | |
1388 | } | |
1389 | } | |
1390 | ||
1391 | static void remove_tempfile_on_signal(int signo) | |
1392 | { | |
1393 | remove_tempfile(); | |
1394 | signal(SIGINT, SIG_DFL); | |
1395 | raise(signo); | |
1396 | } | |
1397 | ||
1398 | static int spawn_prog(const char *pgm, const char **arg) | |
1399 | { | |
1400 | pid_t pid; | |
1401 | int status; | |
1402 | ||
1403 | fflush(NULL); | |
1404 | pid = fork(); | |
1405 | if (pid < 0) | |
1406 | die("unable to fork"); | |
1407 | if (!pid) { | |
1408 | execvp(pgm, (char *const*) arg); | |
1409 | exit(255); | |
1410 | } | |
1411 | ||
1412 | while (waitpid(pid, &status, 0) < 0) { | |
1413 | if (errno == EINTR) | |
1414 | continue; | |
1415 | return -1; | |
1416 | } | |
1417 | ||
1418 | /* Earlier we did not check the exit status because | |
1419 | * diff exits non-zero if files are different, and | |
1420 | * we are not interested in knowing that. It was a | |
1421 | * mistake which made it harder to quit a diff-* | |
1422 | * session that uses the git-apply-patch-script as | |
1423 | * the GIT_EXTERNAL_DIFF. A custom GIT_EXTERNAL_DIFF | |
1424 | * should also exit non-zero only when it wants to | |
1425 | * abort the entire diff-* session. | |
1426 | */ | |
1427 | if (WIFEXITED(status) && !WEXITSTATUS(status)) | |
1428 | return 0; | |
1429 | return -1; | |
1430 | } | |
1431 | ||
1432 | /* An external diff command takes: | |
1433 | * | |
1434 | * diff-cmd name infile1 infile1-sha1 infile1-mode \ | |
1435 | * infile2 infile2-sha1 infile2-mode [ rename-to ] | |
1436 | * | |
1437 | */ | |
1438 | static void run_external_diff(const char *pgm, | |
1439 | const char *name, | |
1440 | const char *other, | |
1441 | struct diff_filespec *one, | |
1442 | struct diff_filespec *two, | |
1443 | const char *xfrm_msg, | |
1444 | int complete_rewrite) | |
1445 | { | |
1446 | const char *spawn_arg[10]; | |
1447 | struct diff_tempfile *temp = diff_temp; | |
1448 | int retval; | |
1449 | static int atexit_asked = 0; | |
1450 | const char *othername; | |
1451 | const char **arg = &spawn_arg[0]; | |
1452 | ||
1453 | othername = (other? other : name); | |
1454 | if (one && two) { | |
1455 | prepare_temp_file(name, &temp[0], one); | |
1456 | prepare_temp_file(othername, &temp[1], two); | |
1457 | if (! atexit_asked && | |
1458 | (temp[0].name == temp[0].tmp_path || | |
1459 | temp[1].name == temp[1].tmp_path)) { | |
1460 | atexit_asked = 1; | |
1461 | atexit(remove_tempfile); | |
1462 | } | |
1463 | signal(SIGINT, remove_tempfile_on_signal); | |
1464 | } | |
1465 | ||
1466 | if (one && two) { | |
1467 | *arg++ = pgm; | |
1468 | *arg++ = name; | |
1469 | *arg++ = temp[0].name; | |
1470 | *arg++ = temp[0].hex; | |
1471 | *arg++ = temp[0].mode; | |
1472 | *arg++ = temp[1].name; | |
1473 | *arg++ = temp[1].hex; | |
1474 | *arg++ = temp[1].mode; | |
1475 | if (other) { | |
1476 | *arg++ = other; | |
1477 | *arg++ = xfrm_msg; | |
1478 | } | |
1479 | } else { | |
1480 | *arg++ = pgm; | |
1481 | *arg++ = name; | |
1482 | } | |
1483 | *arg = NULL; | |
1484 | retval = spawn_prog(pgm, spawn_arg); | |
1485 | remove_tempfile(); | |
1486 | if (retval) { | |
1487 | fprintf(stderr, "external diff died, stopping at %s.\n", name); | |
1488 | exit(1); | |
1489 | } | |
1490 | } | |
1491 | ||
1492 | static void run_diff_cmd(const char *pgm, | |
1493 | const char *name, | |
1494 | const char *other, | |
1495 | struct diff_filespec *one, | |
1496 | struct diff_filespec *two, | |
1497 | const char *xfrm_msg, | |
051308f6 | 1498 | struct diff_options *o, |
6973dcae JH |
1499 | int complete_rewrite) |
1500 | { | |
1501 | if (pgm) { | |
1502 | run_external_diff(pgm, name, other, one, two, xfrm_msg, | |
1503 | complete_rewrite); | |
1504 | return; | |
1505 | } | |
1506 | if (one && two) | |
1507 | builtin_diff(name, other ? other : name, | |
051308f6 | 1508 | one, two, xfrm_msg, o, complete_rewrite); |
6973dcae JH |
1509 | else |
1510 | printf("* Unmerged path %s\n", name); | |
1511 | } | |
1512 | ||
1513 | static void diff_fill_sha1_info(struct diff_filespec *one) | |
1514 | { | |
1515 | if (DIFF_FILE_VALID(one)) { | |
1516 | if (!one->sha1_valid) { | |
1517 | struct stat st; | |
1518 | if (lstat(one->path, &st) < 0) | |
1519 | die("stat %s", one->path); | |
1520 | if (index_path(one->sha1, one->path, &st, 0)) | |
1521 | die("cannot hash %s\n", one->path); | |
1522 | } | |
1523 | } | |
1524 | else | |
e702496e | 1525 | hashclr(one->sha1); |
6973dcae JH |
1526 | } |
1527 | ||
1528 | static void run_diff(struct diff_filepair *p, struct diff_options *o) | |
1529 | { | |
1530 | const char *pgm = external_diff(); | |
1531 | char msg[PATH_MAX*2+300], *xfrm_msg; | |
1532 | struct diff_filespec *one; | |
1533 | struct diff_filespec *two; | |
1534 | const char *name; | |
1535 | const char *other; | |
1536 | char *name_munged, *other_munged; | |
1537 | int complete_rewrite = 0; | |
1538 | int len; | |
1539 | ||
1540 | if (DIFF_PAIR_UNMERGED(p)) { | |
1541 | /* unmerged */ | |
051308f6 | 1542 | run_diff_cmd(pgm, p->one->path, NULL, NULL, NULL, NULL, o, 0); |
6973dcae JH |
1543 | return; |
1544 | } | |
1545 | ||
1546 | name = p->one->path; | |
1547 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
1548 | name_munged = quote_one(name); | |
1549 | other_munged = quote_one(other); | |
1550 | one = p->one; two = p->two; | |
1551 | ||
1552 | diff_fill_sha1_info(one); | |
1553 | diff_fill_sha1_info(two); | |
1554 | ||
1555 | len = 0; | |
1556 | switch (p->status) { | |
1557 | case DIFF_STATUS_COPIED: | |
1558 | len += snprintf(msg + len, sizeof(msg) - len, | |
1559 | "similarity index %d%%\n" | |
1560 | "copy from %s\n" | |
1561 | "copy to %s\n", | |
1562 | (int)(0.5 + p->score * 100.0/MAX_SCORE), | |
1563 | name_munged, other_munged); | |
1564 | break; | |
1565 | case DIFF_STATUS_RENAMED: | |
1566 | len += snprintf(msg + len, sizeof(msg) - len, | |
1567 | "similarity index %d%%\n" | |
1568 | "rename from %s\n" | |
1569 | "rename to %s\n", | |
1570 | (int)(0.5 + p->score * 100.0/MAX_SCORE), | |
1571 | name_munged, other_munged); | |
1572 | break; | |
1573 | case DIFF_STATUS_MODIFIED: | |
1574 | if (p->score) { | |
1575 | len += snprintf(msg + len, sizeof(msg) - len, | |
1576 | "dissimilarity index %d%%\n", | |
1577 | (int)(0.5 + p->score * | |
1578 | 100.0/MAX_SCORE)); | |
1579 | complete_rewrite = 1; | |
1580 | break; | |
1581 | } | |
1582 | /* fallthru */ | |
1583 | default: | |
1584 | /* nothing */ | |
1585 | ; | |
1586 | } | |
1587 | ||
a89fccd2 | 1588 | if (hashcmp(one->sha1, two->sha1)) { |
6973dcae | 1589 | int abbrev = o->full_index ? 40 : DEFAULT_ABBREV; |
6973dcae JH |
1590 | |
1591 | len += snprintf(msg + len, sizeof(msg) - len, | |
1592 | "index %.*s..%.*s", | |
dcb3450f LT |
1593 | abbrev, sha1_to_hex(one->sha1), |
1594 | abbrev, sha1_to_hex(two->sha1)); | |
6973dcae JH |
1595 | if (one->mode == two->mode) |
1596 | len += snprintf(msg + len, sizeof(msg) - len, | |
1597 | " %06o", one->mode); | |
1598 | len += snprintf(msg + len, sizeof(msg) - len, "\n"); | |
1599 | } | |
1600 | ||
1601 | if (len) | |
1602 | msg[--len] = 0; | |
1603 | xfrm_msg = len ? msg : NULL; | |
1604 | ||
1605 | if (!pgm && | |
1606 | DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) && | |
1607 | (S_IFMT & one->mode) != (S_IFMT & two->mode)) { | |
1608 | /* a filepair that changes between file and symlink | |
1609 | * needs to be split into deletion and creation. | |
1610 | */ | |
1611 | struct diff_filespec *null = alloc_filespec(two->path); | |
051308f6 | 1612 | run_diff_cmd(NULL, name, other, one, null, xfrm_msg, o, 0); |
6973dcae JH |
1613 | free(null); |
1614 | null = alloc_filespec(one->path); | |
051308f6 | 1615 | run_diff_cmd(NULL, name, other, null, two, xfrm_msg, o, 0); |
6973dcae JH |
1616 | free(null); |
1617 | } | |
1618 | else | |
051308f6 | 1619 | run_diff_cmd(pgm, name, other, one, two, xfrm_msg, o, |
6973dcae JH |
1620 | complete_rewrite); |
1621 | ||
1622 | free(name_munged); | |
1623 | free(other_munged); | |
1624 | } | |
1625 | ||
1626 | static void run_diffstat(struct diff_filepair *p, struct diff_options *o, | |
1627 | struct diffstat_t *diffstat) | |
1628 | { | |
1629 | const char *name; | |
1630 | const char *other; | |
710158e3 | 1631 | int complete_rewrite = 0; |
6973dcae JH |
1632 | |
1633 | if (DIFF_PAIR_UNMERGED(p)) { | |
1634 | /* unmerged */ | |
0d21efa5 | 1635 | builtin_diffstat(p->one->path, NULL, NULL, NULL, diffstat, o, 0); |
6973dcae JH |
1636 | return; |
1637 | } | |
1638 | ||
1639 | name = p->one->path; | |
1640 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
1641 | ||
1642 | diff_fill_sha1_info(p->one); | |
1643 | diff_fill_sha1_info(p->two); | |
1644 | ||
710158e3 JH |
1645 | if (p->status == DIFF_STATUS_MODIFIED && p->score) |
1646 | complete_rewrite = 1; | |
0d21efa5 | 1647 | builtin_diffstat(name, other, p->one, p->two, diffstat, o, complete_rewrite); |
6973dcae JH |
1648 | } |
1649 | ||
88246898 JS |
1650 | static void run_checkdiff(struct diff_filepair *p, struct diff_options *o) |
1651 | { | |
1652 | const char *name; | |
1653 | const char *other; | |
1654 | ||
1655 | if (DIFF_PAIR_UNMERGED(p)) { | |
1656 | /* unmerged */ | |
1657 | return; | |
1658 | } | |
1659 | ||
1660 | name = p->one->path; | |
1661 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
1662 | ||
1663 | diff_fill_sha1_info(p->one); | |
1664 | diff_fill_sha1_info(p->two); | |
1665 | ||
1666 | builtin_checkdiff(name, other, p->one, p->two); | |
1667 | } | |
1668 | ||
6973dcae JH |
1669 | void diff_setup(struct diff_options *options) |
1670 | { | |
1671 | memset(options, 0, sizeof(*options)); | |
6973dcae JH |
1672 | options->line_termination = '\n'; |
1673 | options->break_opt = -1; | |
1674 | options->rename_limit = -1; | |
ee1e5412 | 1675 | options->context = 3; |
3969cf7d | 1676 | options->msg_sep = ""; |
6973dcae JH |
1677 | |
1678 | options->change = diff_change; | |
1679 | options->add_remove = diff_addremove; | |
801235c5 | 1680 | options->color_diff = diff_use_color_default; |
b68ea12e | 1681 | options->detect_rename = diff_detect_rename_default; |
6973dcae JH |
1682 | } |
1683 | ||
1684 | int diff_setup_done(struct diff_options *options) | |
1685 | { | |
d7de00f7 TH |
1686 | int count = 0; |
1687 | ||
1688 | if (options->output_format & DIFF_FORMAT_NAME) | |
1689 | count++; | |
1690 | if (options->output_format & DIFF_FORMAT_NAME_STATUS) | |
1691 | count++; | |
1692 | if (options->output_format & DIFF_FORMAT_CHECKDIFF) | |
1693 | count++; | |
1694 | if (options->output_format & DIFF_FORMAT_NO_OUTPUT) | |
1695 | count++; | |
1696 | if (count > 1) | |
1697 | die("--name-only, --name-status, --check and -s are mutually exclusive"); | |
1698 | ||
03b9d560 JH |
1699 | if (options->find_copies_harder) |
1700 | options->detect_rename = DIFF_DETECT_COPY; | |
1701 | ||
c6744349 TH |
1702 | if (options->output_format & (DIFF_FORMAT_NAME | |
1703 | DIFF_FORMAT_NAME_STATUS | | |
1704 | DIFF_FORMAT_CHECKDIFF | | |
1705 | DIFF_FORMAT_NO_OUTPUT)) | |
1706 | options->output_format &= ~(DIFF_FORMAT_RAW | | |
1707 | DIFF_FORMAT_DIFFSTAT | | |
1708 | DIFF_FORMAT_SUMMARY | | |
1709 | DIFF_FORMAT_PATCH); | |
1710 | ||
6973dcae JH |
1711 | /* |
1712 | * These cases always need recursive; we do not drop caller-supplied | |
1713 | * recursive bits for other formats here. | |
1714 | */ | |
c6744349 TH |
1715 | if (options->output_format & (DIFF_FORMAT_PATCH | |
1716 | DIFF_FORMAT_DIFFSTAT | | |
1717 | DIFF_FORMAT_CHECKDIFF)) | |
6973dcae | 1718 | options->recursive = 1; |
5e363541 | 1719 | /* |
3969cf7d | 1720 | * Also pickaxe would not work very well if you do not say recursive |
5e363541 | 1721 | */ |
3969cf7d JH |
1722 | if (options->pickaxe) |
1723 | options->recursive = 1; | |
5e363541 | 1724 | |
6973dcae JH |
1725 | if (options->detect_rename && options->rename_limit < 0) |
1726 | options->rename_limit = diff_rename_limit_default; | |
1727 | if (options->setup & DIFF_SETUP_USE_CACHE) { | |
1728 | if (!active_cache) | |
1729 | /* read-cache does not die even when it fails | |
1730 | * so it is safe for us to do this here. Also | |
1731 | * it does not smudge active_cache or active_nr | |
1732 | * when it fails, so we do not have to worry about | |
1733 | * cleaning it up ourselves either. | |
1734 | */ | |
1735 | read_cache(); | |
1736 | } | |
1737 | if (options->setup & DIFF_SETUP_USE_SIZE_CACHE) | |
1738 | use_size_cache = 1; | |
1739 | if (options->abbrev <= 0 || 40 < options->abbrev) | |
1740 | options->abbrev = 40; /* full */ | |
1741 | ||
1742 | return 0; | |
1743 | } | |
1744 | ||
d2543b8e | 1745 | static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val) |
ee1e5412 LT |
1746 | { |
1747 | char c, *eq; | |
1748 | int len; | |
1749 | ||
1750 | if (*arg != '-') | |
1751 | return 0; | |
1752 | c = *++arg; | |
1753 | if (!c) | |
1754 | return 0; | |
1755 | if (c == arg_short) { | |
1756 | c = *++arg; | |
1757 | if (!c) | |
1758 | return 1; | |
1759 | if (val && isdigit(c)) { | |
1760 | char *end; | |
1761 | int n = strtoul(arg, &end, 10); | |
1762 | if (*end) | |
1763 | return 0; | |
1764 | *val = n; | |
1765 | return 1; | |
1766 | } | |
1767 | return 0; | |
1768 | } | |
1769 | if (c != '-') | |
1770 | return 0; | |
1771 | arg++; | |
1772 | eq = strchr(arg, '='); | |
1773 | if (eq) | |
1774 | len = eq - arg; | |
1775 | else | |
1776 | len = strlen(arg); | |
1777 | if (!len || strncmp(arg, arg_long, len)) | |
1778 | return 0; | |
1779 | if (eq) { | |
1780 | int n; | |
1781 | char *end; | |
1782 | if (!isdigit(*++eq)) | |
1783 | return 0; | |
1784 | n = strtoul(eq, &end, 10); | |
1785 | if (*end) | |
1786 | return 0; | |
1787 | *val = n; | |
1788 | } | |
1789 | return 1; | |
1790 | } | |
1791 | ||
6973dcae JH |
1792 | int diff_opt_parse(struct diff_options *options, const char **av, int ac) |
1793 | { | |
1794 | const char *arg = av[0]; | |
1795 | if (!strcmp(arg, "-p") || !strcmp(arg, "-u")) | |
c6744349 | 1796 | options->output_format |= DIFF_FORMAT_PATCH; |
ee1e5412 | 1797 | else if (opt_arg(arg, 'U', "unified", &options->context)) |
c6744349 | 1798 | options->output_format |= DIFF_FORMAT_PATCH; |
a610786f TH |
1799 | else if (!strcmp(arg, "--raw")) |
1800 | options->output_format |= DIFF_FORMAT_RAW; | |
6973dcae | 1801 | else if (!strcmp(arg, "--patch-with-raw")) { |
c6744349 | 1802 | options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_RAW; |
6973dcae JH |
1803 | } |
1804 | else if (!strcmp(arg, "--stat")) | |
c6744349 | 1805 | options->output_format |= DIFF_FORMAT_DIFFSTAT; |
88246898 | 1806 | else if (!strcmp(arg, "--check")) |
c6744349 | 1807 | options->output_format |= DIFF_FORMAT_CHECKDIFF; |
4bbd261b | 1808 | else if (!strcmp(arg, "--summary")) |
c6744349 | 1809 | options->output_format |= DIFF_FORMAT_SUMMARY; |
6973dcae | 1810 | else if (!strcmp(arg, "--patch-with-stat")) { |
c6744349 | 1811 | options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_DIFFSTAT; |
6973dcae JH |
1812 | } |
1813 | else if (!strcmp(arg, "-z")) | |
1814 | options->line_termination = 0; | |
1815 | else if (!strncmp(arg, "-l", 2)) | |
1816 | options->rename_limit = strtoul(arg+2, NULL, 10); | |
1817 | else if (!strcmp(arg, "--full-index")) | |
1818 | options->full_index = 1; | |
0660626c | 1819 | else if (!strcmp(arg, "--binary")) { |
c6744349 | 1820 | options->output_format |= DIFF_FORMAT_PATCH; |
0660626c JH |
1821 | options->full_index = options->binary = 1; |
1822 | } | |
63ac4501 | 1823 | else if (!strcmp(arg, "-a") || !strcmp(arg, "--text")) { |
6d64ea96 SF |
1824 | options->text = 1; |
1825 | } | |
6973dcae | 1826 | else if (!strcmp(arg, "--name-only")) |
c6744349 | 1827 | options->output_format |= DIFF_FORMAT_NAME; |
6973dcae | 1828 | else if (!strcmp(arg, "--name-status")) |
c6744349 | 1829 | options->output_format |= DIFF_FORMAT_NAME_STATUS; |
6973dcae JH |
1830 | else if (!strcmp(arg, "-R")) |
1831 | options->reverse_diff = 1; | |
1832 | else if (!strncmp(arg, "-S", 2)) | |
1833 | options->pickaxe = arg + 2; | |
c6744349 TH |
1834 | else if (!strcmp(arg, "-s")) { |
1835 | options->output_format |= DIFF_FORMAT_NO_OUTPUT; | |
1836 | } | |
6973dcae JH |
1837 | else if (!strncmp(arg, "-O", 2)) |
1838 | options->orderfile = arg + 2; | |
1839 | else if (!strncmp(arg, "--diff-filter=", 14)) | |
1840 | options->filter = arg + 14; | |
1841 | else if (!strcmp(arg, "--pickaxe-all")) | |
1842 | options->pickaxe_opts = DIFF_PICKAXE_ALL; | |
1843 | else if (!strcmp(arg, "--pickaxe-regex")) | |
1844 | options->pickaxe_opts = DIFF_PICKAXE_REGEX; | |
1845 | else if (!strncmp(arg, "-B", 2)) { | |
1846 | if ((options->break_opt = | |
1847 | diff_scoreopt_parse(arg)) == -1) | |
1848 | return -1; | |
1849 | } | |
1850 | else if (!strncmp(arg, "-M", 2)) { | |
1851 | if ((options->rename_score = | |
1852 | diff_scoreopt_parse(arg)) == -1) | |
1853 | return -1; | |
1854 | options->detect_rename = DIFF_DETECT_RENAME; | |
1855 | } | |
1856 | else if (!strncmp(arg, "-C", 2)) { | |
1857 | if ((options->rename_score = | |
1858 | diff_scoreopt_parse(arg)) == -1) | |
1859 | return -1; | |
1860 | options->detect_rename = DIFF_DETECT_COPY; | |
1861 | } | |
1862 | else if (!strcmp(arg, "--find-copies-harder")) | |
1863 | options->find_copies_harder = 1; | |
1864 | else if (!strcmp(arg, "--abbrev")) | |
1865 | options->abbrev = DEFAULT_ABBREV; | |
1866 | else if (!strncmp(arg, "--abbrev=", 9)) { | |
1867 | options->abbrev = strtoul(arg + 9, NULL, 10); | |
1868 | if (options->abbrev < MINIMUM_ABBREV) | |
1869 | options->abbrev = MINIMUM_ABBREV; | |
1870 | else if (40 < options->abbrev) | |
1871 | options->abbrev = 40; | |
1872 | } | |
cd112cef JS |
1873 | else if (!strcmp(arg, "--color")) |
1874 | options->color_diff = 1; | |
fef88bb0 JH |
1875 | else if (!strcmp(arg, "--no-color")) |
1876 | options->color_diff = 0; | |
0d21efa5 JS |
1877 | else if (!strcmp(arg, "-w") || !strcmp(arg, "--ignore-all-space")) |
1878 | options->xdl_opts |= XDF_IGNORE_WHITESPACE; | |
1879 | else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change")) | |
1880 | options->xdl_opts |= XDF_IGNORE_WHITESPACE_CHANGE; | |
f59a59e2 JS |
1881 | else if (!strcmp(arg, "--color-words")) |
1882 | options->color_diff = options->color_diff_words = 1; | |
b68ea12e EW |
1883 | else if (!strcmp(arg, "--no-renames")) |
1884 | options->detect_rename = 0; | |
6973dcae JH |
1885 | else |
1886 | return 0; | |
1887 | return 1; | |
1888 | } | |
1889 | ||
1890 | static int parse_num(const char **cp_p) | |
1891 | { | |
1892 | unsigned long num, scale; | |
1893 | int ch, dot; | |
1894 | const char *cp = *cp_p; | |
1895 | ||
1896 | num = 0; | |
1897 | scale = 1; | |
1898 | dot = 0; | |
1899 | for(;;) { | |
1900 | ch = *cp; | |
1901 | if ( !dot && ch == '.' ) { | |
1902 | scale = 1; | |
1903 | dot = 1; | |
1904 | } else if ( ch == '%' ) { | |
1905 | scale = dot ? scale*100 : 100; | |
1906 | cp++; /* % is always at the end */ | |
1907 | break; | |
1908 | } else if ( ch >= '0' && ch <= '9' ) { | |
1909 | if ( scale < 100000 ) { | |
1910 | scale *= 10; | |
1911 | num = (num*10) + (ch-'0'); | |
1912 | } | |
1913 | } else { | |
1914 | break; | |
1915 | } | |
1916 | cp++; | |
1917 | } | |
1918 | *cp_p = cp; | |
1919 | ||
1920 | /* user says num divided by scale and we say internally that | |
1921 | * is MAX_SCORE * num / scale. | |
1922 | */ | |
1923 | return (num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale); | |
1924 | } | |
1925 | ||
1926 | int diff_scoreopt_parse(const char *opt) | |
1927 | { | |
1928 | int opt1, opt2, cmd; | |
1929 | ||
1930 | if (*opt++ != '-') | |
1931 | return -1; | |
1932 | cmd = *opt++; | |
1933 | if (cmd != 'M' && cmd != 'C' && cmd != 'B') | |
1934 | return -1; /* that is not a -M, -C nor -B option */ | |
1935 | ||
1936 | opt1 = parse_num(&opt); | |
1937 | if (cmd != 'B') | |
1938 | opt2 = 0; | |
1939 | else { | |
1940 | if (*opt == 0) | |
1941 | opt2 = 0; | |
1942 | else if (*opt != '/') | |
1943 | return -1; /* we expect -B80/99 or -B80 */ | |
1944 | else { | |
1945 | opt++; | |
1946 | opt2 = parse_num(&opt); | |
1947 | } | |
1948 | } | |
1949 | if (*opt != 0) | |
1950 | return -1; | |
1951 | return opt1 | (opt2 << 16); | |
1952 | } | |
1953 | ||
1954 | struct diff_queue_struct diff_queued_diff; | |
1955 | ||
1956 | void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp) | |
1957 | { | |
1958 | if (queue->alloc <= queue->nr) { | |
1959 | queue->alloc = alloc_nr(queue->alloc); | |
1960 | queue->queue = xrealloc(queue->queue, | |
1961 | sizeof(dp) * queue->alloc); | |
1962 | } | |
1963 | queue->queue[queue->nr++] = dp; | |
1964 | } | |
1965 | ||
1966 | struct diff_filepair *diff_queue(struct diff_queue_struct *queue, | |
1967 | struct diff_filespec *one, | |
1968 | struct diff_filespec *two) | |
1969 | { | |
ef677686 | 1970 | struct diff_filepair *dp = xcalloc(1, sizeof(*dp)); |
6973dcae JH |
1971 | dp->one = one; |
1972 | dp->two = two; | |
6973dcae JH |
1973 | if (queue) |
1974 | diff_q(queue, dp); | |
1975 | return dp; | |
1976 | } | |
1977 | ||
1978 | void diff_free_filepair(struct diff_filepair *p) | |
1979 | { | |
1980 | diff_free_filespec_data(p->one); | |
1981 | diff_free_filespec_data(p->two); | |
1982 | free(p->one); | |
1983 | free(p->two); | |
1984 | free(p); | |
1985 | } | |
1986 | ||
1987 | /* This is different from find_unique_abbrev() in that | |
1988 | * it stuffs the result with dots for alignment. | |
1989 | */ | |
1990 | const char *diff_unique_abbrev(const unsigned char *sha1, int len) | |
1991 | { | |
1992 | int abblen; | |
1993 | const char *abbrev; | |
1994 | if (len == 40) | |
1995 | return sha1_to_hex(sha1); | |
1996 | ||
1997 | abbrev = find_unique_abbrev(sha1, len); | |
1998 | if (!abbrev) | |
1999 | return sha1_to_hex(sha1); | |
2000 | abblen = strlen(abbrev); | |
2001 | if (abblen < 37) { | |
2002 | static char hex[41]; | |
2003 | if (len < abblen && abblen <= len + 2) | |
2004 | sprintf(hex, "%s%.*s", abbrev, len+3-abblen, ".."); | |
2005 | else | |
2006 | sprintf(hex, "%s...", abbrev); | |
2007 | return hex; | |
2008 | } | |
2009 | return sha1_to_hex(sha1); | |
2010 | } | |
2011 | ||
2012 | static void diff_flush_raw(struct diff_filepair *p, | |
c6744349 | 2013 | struct diff_options *options) |
6973dcae JH |
2014 | { |
2015 | int two_paths; | |
2016 | char status[10]; | |
2017 | int abbrev = options->abbrev; | |
2018 | const char *path_one, *path_two; | |
c6744349 TH |
2019 | int inter_name_termination = '\t'; |
2020 | int line_termination = options->line_termination; | |
2021 | ||
2022 | if (!line_termination) | |
2023 | inter_name_termination = 0; | |
6973dcae JH |
2024 | |
2025 | path_one = p->one->path; | |
2026 | path_two = p->two->path; | |
2027 | if (line_termination) { | |
2028 | path_one = quote_one(path_one); | |
2029 | path_two = quote_one(path_two); | |
2030 | } | |
2031 | ||
2032 | if (p->score) | |
2033 | sprintf(status, "%c%03d", p->status, | |
2034 | (int)(0.5 + p->score * 100.0/MAX_SCORE)); | |
2035 | else { | |
2036 | status[0] = p->status; | |
2037 | status[1] = 0; | |
2038 | } | |
2039 | switch (p->status) { | |
2040 | case DIFF_STATUS_COPIED: | |
2041 | case DIFF_STATUS_RENAMED: | |
2042 | two_paths = 1; | |
2043 | break; | |
2044 | case DIFF_STATUS_ADDED: | |
2045 | case DIFF_STATUS_DELETED: | |
2046 | two_paths = 0; | |
2047 | break; | |
2048 | default: | |
2049 | two_paths = 0; | |
2050 | break; | |
2051 | } | |
c6744349 | 2052 | if (!(options->output_format & DIFF_FORMAT_NAME_STATUS)) { |
6973dcae JH |
2053 | printf(":%06o %06o %s ", |
2054 | p->one->mode, p->two->mode, | |
2055 | diff_unique_abbrev(p->one->sha1, abbrev)); | |
2056 | printf("%s ", | |
2057 | diff_unique_abbrev(p->two->sha1, abbrev)); | |
2058 | } | |
2059 | printf("%s%c%s", status, inter_name_termination, path_one); | |
2060 | if (two_paths) | |
2061 | printf("%c%s", inter_name_termination, path_two); | |
2062 | putchar(line_termination); | |
2063 | if (path_one != p->one->path) | |
2064 | free((void*)path_one); | |
2065 | if (path_two != p->two->path) | |
2066 | free((void*)path_two); | |
2067 | } | |
2068 | ||
d2543b8e | 2069 | static void diff_flush_name(struct diff_filepair *p, int line_termination) |
6973dcae JH |
2070 | { |
2071 | char *path = p->two->path; | |
2072 | ||
2073 | if (line_termination) | |
2074 | path = quote_one(p->two->path); | |
6973dcae JH |
2075 | printf("%s%c", path, line_termination); |
2076 | if (p->two->path != path) | |
2077 | free(path); | |
2078 | } | |
2079 | ||
2080 | int diff_unmodified_pair(struct diff_filepair *p) | |
2081 | { | |
2082 | /* This function is written stricter than necessary to support | |
2083 | * the currently implemented transformers, but the idea is to | |
2084 | * let transformers to produce diff_filepairs any way they want, | |
2085 | * and filter and clean them up here before producing the output. | |
2086 | */ | |
2087 | struct diff_filespec *one, *two; | |
2088 | ||
2089 | if (DIFF_PAIR_UNMERGED(p)) | |
2090 | return 0; /* unmerged is interesting */ | |
2091 | ||
2092 | one = p->one; | |
2093 | two = p->two; | |
2094 | ||
2095 | /* deletion, addition, mode or type change | |
2096 | * and rename are all interesting. | |
2097 | */ | |
2098 | if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) || | |
2099 | DIFF_PAIR_MODE_CHANGED(p) || | |
2100 | strcmp(one->path, two->path)) | |
2101 | return 0; | |
2102 | ||
2103 | /* both are valid and point at the same path. that is, we are | |
2104 | * dealing with a change. | |
2105 | */ | |
2106 | if (one->sha1_valid && two->sha1_valid && | |
a89fccd2 | 2107 | !hashcmp(one->sha1, two->sha1)) |
6973dcae JH |
2108 | return 1; /* no change */ |
2109 | if (!one->sha1_valid && !two->sha1_valid) | |
2110 | return 1; /* both look at the same file on the filesystem. */ | |
2111 | return 0; | |
2112 | } | |
2113 | ||
2114 | static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o) | |
2115 | { | |
2116 | if (diff_unmodified_pair(p)) | |
2117 | return; | |
2118 | ||
2119 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
2120 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
2121 | return; /* no tree diffs in patch format */ | |
2122 | ||
2123 | run_diff(p, o); | |
2124 | } | |
2125 | ||
2126 | static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o, | |
2127 | struct diffstat_t *diffstat) | |
2128 | { | |
2129 | if (diff_unmodified_pair(p)) | |
2130 | return; | |
2131 | ||
2132 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
2133 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
2134 | return; /* no tree diffs in patch format */ | |
2135 | ||
2136 | run_diffstat(p, o, diffstat); | |
2137 | } | |
2138 | ||
88246898 JS |
2139 | static void diff_flush_checkdiff(struct diff_filepair *p, |
2140 | struct diff_options *o) | |
2141 | { | |
2142 | if (diff_unmodified_pair(p)) | |
2143 | return; | |
2144 | ||
2145 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
2146 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
2147 | return; /* no tree diffs in patch format */ | |
2148 | ||
2149 | run_checkdiff(p, o); | |
2150 | } | |
2151 | ||
6973dcae JH |
2152 | int diff_queue_is_empty(void) |
2153 | { | |
2154 | struct diff_queue_struct *q = &diff_queued_diff; | |
2155 | int i; | |
2156 | for (i = 0; i < q->nr; i++) | |
2157 | if (!diff_unmodified_pair(q->queue[i])) | |
2158 | return 0; | |
2159 | return 1; | |
2160 | } | |
2161 | ||
2162 | #if DIFF_DEBUG | |
2163 | void diff_debug_filespec(struct diff_filespec *s, int x, const char *one) | |
2164 | { | |
2165 | fprintf(stderr, "queue[%d] %s (%s) %s %06o %s\n", | |
2166 | x, one ? one : "", | |
2167 | s->path, | |
2168 | DIFF_FILE_VALID(s) ? "valid" : "invalid", | |
2169 | s->mode, | |
2170 | s->sha1_valid ? sha1_to_hex(s->sha1) : ""); | |
2171 | fprintf(stderr, "queue[%d] %s size %lu flags %d\n", | |
2172 | x, one ? one : "", | |
2173 | s->size, s->xfrm_flags); | |
2174 | } | |
2175 | ||
2176 | void diff_debug_filepair(const struct diff_filepair *p, int i) | |
2177 | { | |
2178 | diff_debug_filespec(p->one, i, "one"); | |
2179 | diff_debug_filespec(p->two, i, "two"); | |
2180 | fprintf(stderr, "score %d, status %c stays %d broken %d\n", | |
2181 | p->score, p->status ? p->status : '?', | |
2182 | p->source_stays, p->broken_pair); | |
2183 | } | |
2184 | ||
2185 | void diff_debug_queue(const char *msg, struct diff_queue_struct *q) | |
2186 | { | |
2187 | int i; | |
2188 | if (msg) | |
2189 | fprintf(stderr, "%s\n", msg); | |
2190 | fprintf(stderr, "q->nr = %d\n", q->nr); | |
2191 | for (i = 0; i < q->nr; i++) { | |
2192 | struct diff_filepair *p = q->queue[i]; | |
2193 | diff_debug_filepair(p, i); | |
2194 | } | |
2195 | } | |
2196 | #endif | |
2197 | ||
2198 | static void diff_resolve_rename_copy(void) | |
2199 | { | |
2200 | int i, j; | |
2201 | struct diff_filepair *p, *pp; | |
2202 | struct diff_queue_struct *q = &diff_queued_diff; | |
2203 | ||
2204 | diff_debug_queue("resolve-rename-copy", q); | |
2205 | ||
2206 | for (i = 0; i < q->nr; i++) { | |
2207 | p = q->queue[i]; | |
2208 | p->status = 0; /* undecided */ | |
2209 | if (DIFF_PAIR_UNMERGED(p)) | |
2210 | p->status = DIFF_STATUS_UNMERGED; | |
2211 | else if (!DIFF_FILE_VALID(p->one)) | |
2212 | p->status = DIFF_STATUS_ADDED; | |
2213 | else if (!DIFF_FILE_VALID(p->two)) | |
2214 | p->status = DIFF_STATUS_DELETED; | |
2215 | else if (DIFF_PAIR_TYPE_CHANGED(p)) | |
2216 | p->status = DIFF_STATUS_TYPE_CHANGED; | |
2217 | ||
2218 | /* from this point on, we are dealing with a pair | |
2219 | * whose both sides are valid and of the same type, i.e. | |
2220 | * either in-place edit or rename/copy edit. | |
2221 | */ | |
2222 | else if (DIFF_PAIR_RENAME(p)) { | |
2223 | if (p->source_stays) { | |
2224 | p->status = DIFF_STATUS_COPIED; | |
2225 | continue; | |
2226 | } | |
2227 | /* See if there is some other filepair that | |
2228 | * copies from the same source as us. If so | |
2229 | * we are a copy. Otherwise we are either a | |
2230 | * copy if the path stays, or a rename if it | |
2231 | * does not, but we already handled "stays" case. | |
2232 | */ | |
2233 | for (j = i + 1; j < q->nr; j++) { | |
2234 | pp = q->queue[j]; | |
2235 | if (strcmp(pp->one->path, p->one->path)) | |
2236 | continue; /* not us */ | |
2237 | if (!DIFF_PAIR_RENAME(pp)) | |
2238 | continue; /* not a rename/copy */ | |
2239 | /* pp is a rename/copy from the same source */ | |
2240 | p->status = DIFF_STATUS_COPIED; | |
2241 | break; | |
2242 | } | |
2243 | if (!p->status) | |
2244 | p->status = DIFF_STATUS_RENAMED; | |
2245 | } | |
a89fccd2 | 2246 | else if (hashcmp(p->one->sha1, p->two->sha1) || |
6973dcae JH |
2247 | p->one->mode != p->two->mode) |
2248 | p->status = DIFF_STATUS_MODIFIED; | |
2249 | else { | |
2250 | /* This is a "no-change" entry and should not | |
2251 | * happen anymore, but prepare for broken callers. | |
2252 | */ | |
2253 | error("feeding unmodified %s to diffcore", | |
2254 | p->one->path); | |
2255 | p->status = DIFF_STATUS_UNKNOWN; | |
2256 | } | |
2257 | } | |
2258 | diff_debug_queue("resolve-rename-copy done", q); | |
2259 | } | |
2260 | ||
c6744349 | 2261 | static int check_pair_status(struct diff_filepair *p) |
6973dcae | 2262 | { |
6973dcae JH |
2263 | switch (p->status) { |
2264 | case DIFF_STATUS_UNKNOWN: | |
c6744349 | 2265 | return 0; |
6973dcae JH |
2266 | case 0: |
2267 | die("internal error in diff-resolve-rename-copy"); | |
6973dcae | 2268 | default: |
c6744349 | 2269 | return 1; |
6973dcae JH |
2270 | } |
2271 | } | |
2272 | ||
c6744349 TH |
2273 | static void flush_one_pair(struct diff_filepair *p, struct diff_options *opt) |
2274 | { | |
2275 | int fmt = opt->output_format; | |
2276 | ||
2277 | if (fmt & DIFF_FORMAT_CHECKDIFF) | |
2278 | diff_flush_checkdiff(p, opt); | |
2279 | else if (fmt & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS)) | |
2280 | diff_flush_raw(p, opt); | |
2281 | else if (fmt & DIFF_FORMAT_NAME) | |
2282 | diff_flush_name(p, opt->line_termination); | |
2283 | } | |
2284 | ||
4bbd261b SE |
2285 | static void show_file_mode_name(const char *newdelete, struct diff_filespec *fs) |
2286 | { | |
2287 | if (fs->mode) | |
2288 | printf(" %s mode %06o %s\n", newdelete, fs->mode, fs->path); | |
2289 | else | |
2290 | printf(" %s %s\n", newdelete, fs->path); | |
2291 | } | |
2292 | ||
2293 | ||
2294 | static void show_mode_change(struct diff_filepair *p, int show_name) | |
2295 | { | |
2296 | if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) { | |
2297 | if (show_name) | |
2298 | printf(" mode change %06o => %06o %s\n", | |
2299 | p->one->mode, p->two->mode, p->two->path); | |
2300 | else | |
2301 | printf(" mode change %06o => %06o\n", | |
2302 | p->one->mode, p->two->mode); | |
2303 | } | |
2304 | } | |
2305 | ||
2306 | static void show_rename_copy(const char *renamecopy, struct diff_filepair *p) | |
2307 | { | |
2308 | const char *old, *new; | |
2309 | ||
2310 | /* Find common prefix */ | |
2311 | old = p->one->path; | |
2312 | new = p->two->path; | |
2313 | while (1) { | |
2314 | const char *slash_old, *slash_new; | |
2315 | slash_old = strchr(old, '/'); | |
2316 | slash_new = strchr(new, '/'); | |
2317 | if (!slash_old || | |
2318 | !slash_new || | |
2319 | slash_old - old != slash_new - new || | |
2320 | memcmp(old, new, slash_new - new)) | |
2321 | break; | |
2322 | old = slash_old + 1; | |
2323 | new = slash_new + 1; | |
2324 | } | |
2325 | /* p->one->path thru old is the common prefix, and old and new | |
2326 | * through the end of names are renames | |
2327 | */ | |
2328 | if (old != p->one->path) | |
2329 | printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy, | |
2330 | (int)(old - p->one->path), p->one->path, | |
2331 | old, new, (int)(0.5 + p->score * 100.0/MAX_SCORE)); | |
2332 | else | |
2333 | printf(" %s %s => %s (%d%%)\n", renamecopy, | |
2334 | p->one->path, p->two->path, | |
2335 | (int)(0.5 + p->score * 100.0/MAX_SCORE)); | |
2336 | show_mode_change(p, 0); | |
2337 | } | |
2338 | ||
2339 | static void diff_summary(struct diff_filepair *p) | |
2340 | { | |
2341 | switch(p->status) { | |
2342 | case DIFF_STATUS_DELETED: | |
2343 | show_file_mode_name("delete", p->one); | |
2344 | break; | |
2345 | case DIFF_STATUS_ADDED: | |
2346 | show_file_mode_name("create", p->two); | |
2347 | break; | |
2348 | case DIFF_STATUS_COPIED: | |
2349 | show_rename_copy("copy", p); | |
2350 | break; | |
2351 | case DIFF_STATUS_RENAMED: | |
2352 | show_rename_copy("rename", p); | |
2353 | break; | |
2354 | default: | |
2355 | if (p->score) { | |
2356 | printf(" rewrite %s (%d%%)\n", p->two->path, | |
2357 | (int)(0.5 + p->score * 100.0/MAX_SCORE)); | |
2358 | show_mode_change(p, 0); | |
2359 | } else show_mode_change(p, 1); | |
2360 | break; | |
2361 | } | |
2362 | } | |
2363 | ||
fcb3d0ad JS |
2364 | struct patch_id_t { |
2365 | struct xdiff_emit_state xm; | |
2366 | SHA_CTX *ctx; | |
2367 | int patchlen; | |
2368 | }; | |
2369 | ||
2370 | static int remove_space(char *line, int len) | |
2371 | { | |
2372 | int i; | |
2373 | char *dst = line; | |
2374 | unsigned char c; | |
2375 | ||
2376 | for (i = 0; i < len; i++) | |
2377 | if (!isspace((c = line[i]))) | |
2378 | *dst++ = c; | |
2379 | ||
2380 | return dst - line; | |
2381 | } | |
2382 | ||
2383 | static void patch_id_consume(void *priv, char *line, unsigned long len) | |
2384 | { | |
2385 | struct patch_id_t *data = priv; | |
2386 | int new_len; | |
2387 | ||
2388 | /* Ignore line numbers when computing the SHA1 of the patch */ | |
2389 | if (!strncmp(line, "@@ -", 4)) | |
2390 | return; | |
2391 | ||
2392 | new_len = remove_space(line, len); | |
2393 | ||
2394 | SHA1_Update(data->ctx, line, new_len); | |
2395 | data->patchlen += new_len; | |
2396 | } | |
2397 | ||
2398 | /* returns 0 upon success, and writes result into sha1 */ | |
2399 | static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1) | |
2400 | { | |
2401 | struct diff_queue_struct *q = &diff_queued_diff; | |
2402 | int i; | |
2403 | SHA_CTX ctx; | |
2404 | struct patch_id_t data; | |
2405 | char buffer[PATH_MAX * 4 + 20]; | |
2406 | ||
2407 | SHA1_Init(&ctx); | |
2408 | memset(&data, 0, sizeof(struct patch_id_t)); | |
2409 | data.ctx = &ctx; | |
2410 | data.xm.consume = patch_id_consume; | |
2411 | ||
2412 | for (i = 0; i < q->nr; i++) { | |
2413 | xpparam_t xpp; | |
2414 | xdemitconf_t xecfg; | |
2415 | xdemitcb_t ecb; | |
2416 | mmfile_t mf1, mf2; | |
2417 | struct diff_filepair *p = q->queue[i]; | |
2418 | int len1, len2; | |
2419 | ||
2420 | if (p->status == 0) | |
2421 | return error("internal diff status error"); | |
2422 | if (p->status == DIFF_STATUS_UNKNOWN) | |
2423 | continue; | |
2424 | if (diff_unmodified_pair(p)) | |
2425 | continue; | |
2426 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
2427 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
2428 | continue; | |
2429 | if (DIFF_PAIR_UNMERGED(p)) | |
2430 | continue; | |
2431 | ||
2432 | diff_fill_sha1_info(p->one); | |
2433 | diff_fill_sha1_info(p->two); | |
2434 | if (fill_mmfile(&mf1, p->one) < 0 || | |
2435 | fill_mmfile(&mf2, p->two) < 0) | |
2436 | return error("unable to read files to diff"); | |
2437 | ||
2438 | /* Maybe hash p->two? into the patch id? */ | |
2439 | if (mmfile_is_binary(&mf2)) | |
2440 | continue; | |
2441 | ||
2442 | len1 = remove_space(p->one->path, strlen(p->one->path)); | |
2443 | len2 = remove_space(p->two->path, strlen(p->two->path)); | |
2444 | if (p->one->mode == 0) | |
2445 | len1 = snprintf(buffer, sizeof(buffer), | |
2446 | "diff--gita/%.*sb/%.*s" | |
2447 | "newfilemode%06o" | |
2448 | "---/dev/null" | |
2449 | "+++b/%.*s", | |
2450 | len1, p->one->path, | |
2451 | len2, p->two->path, | |
2452 | p->two->mode, | |
2453 | len2, p->two->path); | |
2454 | else if (p->two->mode == 0) | |
2455 | len1 = snprintf(buffer, sizeof(buffer), | |
2456 | "diff--gita/%.*sb/%.*s" | |
2457 | "deletedfilemode%06o" | |
2458 | "---a/%.*s" | |
2459 | "+++/dev/null", | |
2460 | len1, p->one->path, | |
2461 | len2, p->two->path, | |
2462 | p->one->mode, | |
2463 | len1, p->one->path); | |
2464 | else | |
2465 | len1 = snprintf(buffer, sizeof(buffer), | |
2466 | "diff--gita/%.*sb/%.*s" | |
2467 | "---a/%.*s" | |
2468 | "+++b/%.*s", | |
2469 | len1, p->one->path, | |
2470 | len2, p->two->path, | |
2471 | len1, p->one->path, | |
2472 | len2, p->two->path); | |
2473 | SHA1_Update(&ctx, buffer, len1); | |
2474 | ||
2475 | xpp.flags = XDF_NEED_MINIMAL; | |
2476 | xecfg.ctxlen = 3; | |
9fdc3bb5 | 2477 | xecfg.flags = XDL_EMIT_FUNCNAMES; |
fcb3d0ad JS |
2478 | ecb.outf = xdiff_outf; |
2479 | ecb.priv = &data; | |
2480 | xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); | |
2481 | } | |
2482 | ||
2483 | SHA1_Final(sha1, &ctx); | |
2484 | return 0; | |
2485 | } | |
2486 | ||
2487 | int diff_flush_patch_id(struct diff_options *options, unsigned char *sha1) | |
2488 | { | |
2489 | struct diff_queue_struct *q = &diff_queued_diff; | |
2490 | int i; | |
2491 | int result = diff_get_patch_id(options, sha1); | |
2492 | ||
2493 | for (i = 0; i < q->nr; i++) | |
2494 | diff_free_filepair(q->queue[i]); | |
2495 | ||
2496 | free(q->queue); | |
2497 | q->queue = NULL; | |
2498 | q->nr = q->alloc = 0; | |
2499 | ||
2500 | return result; | |
2501 | } | |
2502 | ||
946c3784 | 2503 | static int is_summary_empty(const struct diff_queue_struct *q) |
6973dcae | 2504 | { |
6973dcae | 2505 | int i; |
6973dcae | 2506 | |
946c3784 TH |
2507 | for (i = 0; i < q->nr; i++) { |
2508 | const struct diff_filepair *p = q->queue[i]; | |
2509 | ||
2510 | switch (p->status) { | |
2511 | case DIFF_STATUS_DELETED: | |
2512 | case DIFF_STATUS_ADDED: | |
2513 | case DIFF_STATUS_COPIED: | |
2514 | case DIFF_STATUS_RENAMED: | |
2515 | return 0; | |
2516 | default: | |
2517 | if (p->score) | |
2518 | return 0; | |
2519 | if (p->one->mode && p->two->mode && | |
2520 | p->one->mode != p->two->mode) | |
2521 | return 0; | |
2522 | break; | |
2523 | } | |
6973dcae | 2524 | } |
946c3784 TH |
2525 | return 1; |
2526 | } | |
2527 | ||
6973dcae JH |
2528 | void diff_flush(struct diff_options *options) |
2529 | { | |
2530 | struct diff_queue_struct *q = &diff_queued_diff; | |
c6744349 | 2531 | int i, output_format = options->output_format; |
946c3784 | 2532 | int separator = 0; |
6973dcae | 2533 | |
c6744349 TH |
2534 | /* |
2535 | * Order: raw, stat, summary, patch | |
2536 | * or: name/name-status/checkdiff (other bits clear) | |
2537 | */ | |
946c3784 TH |
2538 | if (!q->nr) |
2539 | goto free_queue; | |
6973dcae | 2540 | |
c6744349 TH |
2541 | if (output_format & (DIFF_FORMAT_RAW | |
2542 | DIFF_FORMAT_NAME | | |
2543 | DIFF_FORMAT_NAME_STATUS | | |
2544 | DIFF_FORMAT_CHECKDIFF)) { | |
6973dcae JH |
2545 | for (i = 0; i < q->nr; i++) { |
2546 | struct diff_filepair *p = q->queue[i]; | |
c6744349 TH |
2547 | if (check_pair_status(p)) |
2548 | flush_one_pair(p, options); | |
6973dcae | 2549 | } |
946c3784 | 2550 | separator++; |
6973dcae | 2551 | } |
c6744349 TH |
2552 | |
2553 | if (output_format & DIFF_FORMAT_DIFFSTAT) { | |
5e2b0636 | 2554 | struct diffstat_t diffstat; |
c6744349 | 2555 | |
5e2b0636 TH |
2556 | memset(&diffstat, 0, sizeof(struct diffstat_t)); |
2557 | diffstat.xm.consume = diffstat_consume; | |
6973dcae JH |
2558 | for (i = 0; i < q->nr; i++) { |
2559 | struct diff_filepair *p = q->queue[i]; | |
c6744349 | 2560 | if (check_pair_status(p)) |
5e2b0636 | 2561 | diff_flush_stat(p, options, &diffstat); |
6973dcae | 2562 | } |
5e2b0636 | 2563 | show_stats(&diffstat); |
3969cf7d | 2564 | separator++; |
6973dcae JH |
2565 | } |
2566 | ||
946c3784 | 2567 | if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) { |
c6744349 TH |
2568 | for (i = 0; i < q->nr; i++) |
2569 | diff_summary(q->queue[i]); | |
3969cf7d | 2570 | separator++; |
6973dcae JH |
2571 | } |
2572 | ||
c6744349 | 2573 | if (output_format & DIFF_FORMAT_PATCH) { |
946c3784 TH |
2574 | if (separator) { |
2575 | if (options->stat_sep) { | |
2576 | /* attach patch instead of inline */ | |
c6744349 | 2577 | fputs(options->stat_sep, stdout); |
946c3784 | 2578 | } else { |
c6744349 | 2579 | putchar(options->line_termination); |
946c3784 | 2580 | } |
c6744349 TH |
2581 | } |
2582 | ||
2583 | for (i = 0; i < q->nr; i++) { | |
2584 | struct diff_filepair *p = q->queue[i]; | |
2585 | if (check_pair_status(p)) | |
2586 | diff_flush_patch(p, options); | |
2587 | } | |
4bbd261b SE |
2588 | } |
2589 | ||
c6744349 TH |
2590 | for (i = 0; i < q->nr; i++) |
2591 | diff_free_filepair(q->queue[i]); | |
946c3784 | 2592 | free_queue: |
6973dcae JH |
2593 | free(q->queue); |
2594 | q->queue = NULL; | |
2595 | q->nr = q->alloc = 0; | |
2596 | } | |
2597 | ||
2598 | static void diffcore_apply_filter(const char *filter) | |
2599 | { | |
2600 | int i; | |
2601 | struct diff_queue_struct *q = &diff_queued_diff; | |
2602 | struct diff_queue_struct outq; | |
2603 | outq.queue = NULL; | |
2604 | outq.nr = outq.alloc = 0; | |
2605 | ||
2606 | if (!filter) | |
2607 | return; | |
2608 | ||
2609 | if (strchr(filter, DIFF_STATUS_FILTER_AON)) { | |
2610 | int found; | |
2611 | for (i = found = 0; !found && i < q->nr; i++) { | |
2612 | struct diff_filepair *p = q->queue[i]; | |
2613 | if (((p->status == DIFF_STATUS_MODIFIED) && | |
2614 | ((p->score && | |
2615 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
2616 | (!p->score && | |
2617 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
2618 | ((p->status != DIFF_STATUS_MODIFIED) && | |
2619 | strchr(filter, p->status))) | |
2620 | found++; | |
2621 | } | |
2622 | if (found) | |
2623 | return; | |
2624 | ||
2625 | /* otherwise we will clear the whole queue | |
2626 | * by copying the empty outq at the end of this | |
2627 | * function, but first clear the current entries | |
2628 | * in the queue. | |
2629 | */ | |
2630 | for (i = 0; i < q->nr; i++) | |
2631 | diff_free_filepair(q->queue[i]); | |
2632 | } | |
2633 | else { | |
2634 | /* Only the matching ones */ | |
2635 | for (i = 0; i < q->nr; i++) { | |
2636 | struct diff_filepair *p = q->queue[i]; | |
2637 | ||
2638 | if (((p->status == DIFF_STATUS_MODIFIED) && | |
2639 | ((p->score && | |
2640 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
2641 | (!p->score && | |
2642 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
2643 | ((p->status != DIFF_STATUS_MODIFIED) && | |
2644 | strchr(filter, p->status))) | |
2645 | diff_q(&outq, p); | |
2646 | else | |
2647 | diff_free_filepair(p); | |
2648 | } | |
2649 | } | |
2650 | free(q->queue); | |
2651 | *q = outq; | |
2652 | } | |
2653 | ||
2654 | void diffcore_std(struct diff_options *options) | |
2655 | { | |
2656 | if (options->break_opt != -1) | |
2657 | diffcore_break(options->break_opt); | |
2658 | if (options->detect_rename) | |
2659 | diffcore_rename(options); | |
2660 | if (options->break_opt != -1) | |
2661 | diffcore_merge_broken(); | |
2662 | if (options->pickaxe) | |
2663 | diffcore_pickaxe(options->pickaxe, options->pickaxe_opts); | |
2664 | if (options->orderfile) | |
2665 | diffcore_order(options->orderfile); | |
2666 | diff_resolve_rename_copy(); | |
2667 | diffcore_apply_filter(options->filter); | |
2668 | } | |
2669 | ||
2670 | ||
2671 | void diffcore_std_no_resolve(struct diff_options *options) | |
2672 | { | |
2673 | if (options->pickaxe) | |
2674 | diffcore_pickaxe(options->pickaxe, options->pickaxe_opts); | |
2675 | if (options->orderfile) | |
2676 | diffcore_order(options->orderfile); | |
2677 | diffcore_apply_filter(options->filter); | |
2678 | } | |
2679 | ||
2680 | void diff_addremove(struct diff_options *options, | |
2681 | int addremove, unsigned mode, | |
2682 | const unsigned char *sha1, | |
2683 | const char *base, const char *path) | |
2684 | { | |
2685 | char concatpath[PATH_MAX]; | |
2686 | struct diff_filespec *one, *two; | |
2687 | ||
2688 | /* This may look odd, but it is a preparation for | |
2689 | * feeding "there are unchanged files which should | |
2690 | * not produce diffs, but when you are doing copy | |
2691 | * detection you would need them, so here they are" | |
2692 | * entries to the diff-core. They will be prefixed | |
2693 | * with something like '=' or '*' (I haven't decided | |
2694 | * which but should not make any difference). | |
2695 | * Feeding the same new and old to diff_change() | |
2696 | * also has the same effect. | |
2697 | * Before the final output happens, they are pruned after | |
2698 | * merged into rename/copy pairs as appropriate. | |
2699 | */ | |
2700 | if (options->reverse_diff) | |
2701 | addremove = (addremove == '+' ? '-' : | |
2702 | addremove == '-' ? '+' : addremove); | |
2703 | ||
2704 | if (!path) path = ""; | |
2705 | sprintf(concatpath, "%s%s", base, path); | |
2706 | one = alloc_filespec(concatpath); | |
2707 | two = alloc_filespec(concatpath); | |
2708 | ||
2709 | if (addremove != '+') | |
2710 | fill_filespec(one, sha1, mode); | |
2711 | if (addremove != '-') | |
2712 | fill_filespec(two, sha1, mode); | |
2713 | ||
2714 | diff_queue(&diff_queued_diff, one, two); | |
2715 | } | |
2716 | ||
2717 | void diff_change(struct diff_options *options, | |
2718 | unsigned old_mode, unsigned new_mode, | |
2719 | const unsigned char *old_sha1, | |
2720 | const unsigned char *new_sha1, | |
2721 | const char *base, const char *path) | |
2722 | { | |
2723 | char concatpath[PATH_MAX]; | |
2724 | struct diff_filespec *one, *two; | |
2725 | ||
2726 | if (options->reverse_diff) { | |
2727 | unsigned tmp; | |
2728 | const unsigned char *tmp_c; | |
2729 | tmp = old_mode; old_mode = new_mode; new_mode = tmp; | |
2730 | tmp_c = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_c; | |
2731 | } | |
2732 | if (!path) path = ""; | |
2733 | sprintf(concatpath, "%s%s", base, path); | |
2734 | one = alloc_filespec(concatpath); | |
2735 | two = alloc_filespec(concatpath); | |
2736 | fill_filespec(one, old_sha1, old_mode); | |
2737 | fill_filespec(two, new_sha1, new_mode); | |
2738 | ||
2739 | diff_queue(&diff_queued_diff, one, two); | |
2740 | } | |
2741 | ||
2742 | void diff_unmerge(struct diff_options *options, | |
2743 | const char *path) | |
2744 | { | |
2745 | struct diff_filespec *one, *two; | |
2746 | one = alloc_filespec(path); | |
2747 | two = alloc_filespec(path); | |
2748 | diff_queue(&diff_queued_diff, one, two); | |
2749 | } |