]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * Copyright (C) 2005 Junio C Hamano | |
3 | */ | |
4 | #include "cache.h" | |
5 | #include "quote.h" | |
6 | #include "diff.h" | |
7 | #include "diffcore.h" | |
8 | #include "delta.h" | |
9 | #include "xdiff-interface.h" | |
10 | #include "color.h" | |
11 | #include "attr.h" | |
12 | #include "run-command.h" | |
13 | #include "utf8.h" | |
14 | #include "userdiff.h" | |
15 | #include "sigchain.h" | |
16 | #include "submodule.h" | |
17 | #include "ll-merge.h" | |
18 | ||
19 | #ifdef NO_FAST_WORKING_DIRECTORY | |
20 | #define FAST_WORKING_DIRECTORY 0 | |
21 | #else | |
22 | #define FAST_WORKING_DIRECTORY 1 | |
23 | #endif | |
24 | ||
25 | static int diff_detect_rename_default; | |
26 | static int diff_rename_limit_default = 200; | |
27 | static int diff_suppress_blank_empty; | |
28 | int diff_use_color_default = -1; | |
29 | static const char *diff_word_regex_cfg; | |
30 | static const char *external_diff_cmd_cfg; | |
31 | int diff_auto_refresh_index = 1; | |
32 | static int diff_mnemonic_prefix; | |
33 | static int diff_no_prefix; | |
34 | static struct diff_options default_diff_options; | |
35 | ||
36 | static char diff_colors[][COLOR_MAXLEN] = { | |
37 | GIT_COLOR_RESET, | |
38 | GIT_COLOR_NORMAL, /* PLAIN */ | |
39 | GIT_COLOR_BOLD, /* METAINFO */ | |
40 | GIT_COLOR_CYAN, /* FRAGINFO */ | |
41 | GIT_COLOR_RED, /* OLD */ | |
42 | GIT_COLOR_GREEN, /* NEW */ | |
43 | GIT_COLOR_YELLOW, /* COMMIT */ | |
44 | GIT_COLOR_BG_RED, /* WHITESPACE */ | |
45 | GIT_COLOR_NORMAL, /* FUNCINFO */ | |
46 | }; | |
47 | ||
48 | static int parse_diff_color_slot(const char *var, int ofs) | |
49 | { | |
50 | if (!strcasecmp(var+ofs, "plain")) | |
51 | return DIFF_PLAIN; | |
52 | if (!strcasecmp(var+ofs, "meta")) | |
53 | return DIFF_METAINFO; | |
54 | if (!strcasecmp(var+ofs, "frag")) | |
55 | return DIFF_FRAGINFO; | |
56 | if (!strcasecmp(var+ofs, "old")) | |
57 | return DIFF_FILE_OLD; | |
58 | if (!strcasecmp(var+ofs, "new")) | |
59 | return DIFF_FILE_NEW; | |
60 | if (!strcasecmp(var+ofs, "commit")) | |
61 | return DIFF_COMMIT; | |
62 | if (!strcasecmp(var+ofs, "whitespace")) | |
63 | return DIFF_WHITESPACE; | |
64 | if (!strcasecmp(var+ofs, "func")) | |
65 | return DIFF_FUNCINFO; | |
66 | return -1; | |
67 | } | |
68 | ||
69 | static int git_config_rename(const char *var, const char *value) | |
70 | { | |
71 | if (!value) | |
72 | return DIFF_DETECT_RENAME; | |
73 | if (!strcasecmp(value, "copies") || !strcasecmp(value, "copy")) | |
74 | return DIFF_DETECT_COPY; | |
75 | return git_config_bool(var,value) ? DIFF_DETECT_RENAME : 0; | |
76 | } | |
77 | ||
78 | /* | |
79 | * These are to give UI layer defaults. | |
80 | * The core-level commands such as git-diff-files should | |
81 | * never be affected by the setting of diff.renames | |
82 | * the user happens to have in the configuration file. | |
83 | */ | |
84 | int git_diff_ui_config(const char *var, const char *value, void *cb) | |
85 | { | |
86 | if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) { | |
87 | diff_use_color_default = git_config_colorbool(var, value, -1); | |
88 | return 0; | |
89 | } | |
90 | if (!strcmp(var, "diff.renames")) { | |
91 | diff_detect_rename_default = git_config_rename(var, value); | |
92 | return 0; | |
93 | } | |
94 | if (!strcmp(var, "diff.autorefreshindex")) { | |
95 | diff_auto_refresh_index = git_config_bool(var, value); | |
96 | return 0; | |
97 | } | |
98 | if (!strcmp(var, "diff.mnemonicprefix")) { | |
99 | diff_mnemonic_prefix = git_config_bool(var, value); | |
100 | return 0; | |
101 | } | |
102 | if (!strcmp(var, "diff.noprefix")) { | |
103 | diff_no_prefix = git_config_bool(var, value); | |
104 | return 0; | |
105 | } | |
106 | if (!strcmp(var, "diff.external")) | |
107 | return git_config_string(&external_diff_cmd_cfg, var, value); | |
108 | if (!strcmp(var, "diff.wordregex")) | |
109 | return git_config_string(&diff_word_regex_cfg, var, value); | |
110 | ||
111 | if (!strcmp(var, "diff.ignoresubmodules")) | |
112 | handle_ignore_submodules_arg(&default_diff_options, value); | |
113 | ||
114 | return git_diff_basic_config(var, value, cb); | |
115 | } | |
116 | ||
117 | int git_diff_basic_config(const char *var, const char *value, void *cb) | |
118 | { | |
119 | if (!strcmp(var, "diff.renamelimit")) { | |
120 | diff_rename_limit_default = git_config_int(var, value); | |
121 | return 0; | |
122 | } | |
123 | ||
124 | switch (userdiff_config(var, value)) { | |
125 | case 0: break; | |
126 | case -1: return -1; | |
127 | default: return 0; | |
128 | } | |
129 | ||
130 | if (!prefixcmp(var, "diff.color.") || !prefixcmp(var, "color.diff.")) { | |
131 | int slot = parse_diff_color_slot(var, 11); | |
132 | if (slot < 0) | |
133 | return 0; | |
134 | if (!value) | |
135 | return config_error_nonbool(var); | |
136 | color_parse(value, var, diff_colors[slot]); | |
137 | return 0; | |
138 | } | |
139 | ||
140 | /* like GNU diff's --suppress-blank-empty option */ | |
141 | if (!strcmp(var, "diff.suppressblankempty") || | |
142 | /* for backwards compatibility */ | |
143 | !strcmp(var, "diff.suppress-blank-empty")) { | |
144 | diff_suppress_blank_empty = git_config_bool(var, value); | |
145 | return 0; | |
146 | } | |
147 | ||
148 | if (!prefixcmp(var, "submodule.")) | |
149 | return parse_submodule_config_option(var, value); | |
150 | ||
151 | return git_color_default_config(var, value, cb); | |
152 | } | |
153 | ||
154 | static char *quote_two(const char *one, const char *two) | |
155 | { | |
156 | int need_one = quote_c_style(one, NULL, NULL, 1); | |
157 | int need_two = quote_c_style(two, NULL, NULL, 1); | |
158 | struct strbuf res = STRBUF_INIT; | |
159 | ||
160 | if (need_one + need_two) { | |
161 | strbuf_addch(&res, '"'); | |
162 | quote_c_style(one, &res, NULL, 1); | |
163 | quote_c_style(two, &res, NULL, 1); | |
164 | strbuf_addch(&res, '"'); | |
165 | } else { | |
166 | strbuf_addstr(&res, one); | |
167 | strbuf_addstr(&res, two); | |
168 | } | |
169 | return strbuf_detach(&res, NULL); | |
170 | } | |
171 | ||
172 | static const char *external_diff(void) | |
173 | { | |
174 | static const char *external_diff_cmd = NULL; | |
175 | static int done_preparing = 0; | |
176 | ||
177 | if (done_preparing) | |
178 | return external_diff_cmd; | |
179 | external_diff_cmd = getenv("GIT_EXTERNAL_DIFF"); | |
180 | if (!external_diff_cmd) | |
181 | external_diff_cmd = external_diff_cmd_cfg; | |
182 | done_preparing = 1; | |
183 | return external_diff_cmd; | |
184 | } | |
185 | ||
186 | static struct diff_tempfile { | |
187 | const char *name; /* filename external diff should read from */ | |
188 | char hex[41]; | |
189 | char mode[10]; | |
190 | char tmp_path[PATH_MAX]; | |
191 | } diff_temp[2]; | |
192 | ||
193 | typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len); | |
194 | ||
195 | struct emit_callback { | |
196 | int color_diff; | |
197 | unsigned ws_rule; | |
198 | int blank_at_eof_in_preimage; | |
199 | int blank_at_eof_in_postimage; | |
200 | int lno_in_preimage; | |
201 | int lno_in_postimage; | |
202 | sane_truncate_fn truncate; | |
203 | const char **label_path; | |
204 | struct diff_words_data *diff_words; | |
205 | struct diff_options *opt; | |
206 | int *found_changesp; | |
207 | struct strbuf *header; | |
208 | }; | |
209 | ||
210 | static int count_lines(const char *data, int size) | |
211 | { | |
212 | int count, ch, completely_empty = 1, nl_just_seen = 0; | |
213 | count = 0; | |
214 | while (0 < size--) { | |
215 | ch = *data++; | |
216 | if (ch == '\n') { | |
217 | count++; | |
218 | nl_just_seen = 1; | |
219 | completely_empty = 0; | |
220 | } | |
221 | else { | |
222 | nl_just_seen = 0; | |
223 | completely_empty = 0; | |
224 | } | |
225 | } | |
226 | if (completely_empty) | |
227 | return 0; | |
228 | if (!nl_just_seen) | |
229 | count++; /* no trailing newline */ | |
230 | return count; | |
231 | } | |
232 | ||
233 | static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one) | |
234 | { | |
235 | if (!DIFF_FILE_VALID(one)) { | |
236 | mf->ptr = (char *)""; /* does not matter */ | |
237 | mf->size = 0; | |
238 | return 0; | |
239 | } | |
240 | else if (diff_populate_filespec(one, 0)) | |
241 | return -1; | |
242 | ||
243 | mf->ptr = one->data; | |
244 | mf->size = one->size; | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static int count_trailing_blank(mmfile_t *mf, unsigned ws_rule) | |
249 | { | |
250 | char *ptr = mf->ptr; | |
251 | long size = mf->size; | |
252 | int cnt = 0; | |
253 | ||
254 | if (!size) | |
255 | return cnt; | |
256 | ptr += size - 1; /* pointing at the very end */ | |
257 | if (*ptr != '\n') | |
258 | ; /* incomplete line */ | |
259 | else | |
260 | ptr--; /* skip the last LF */ | |
261 | while (mf->ptr < ptr) { | |
262 | char *prev_eol; | |
263 | for (prev_eol = ptr; mf->ptr <= prev_eol; prev_eol--) | |
264 | if (*prev_eol == '\n') | |
265 | break; | |
266 | if (!ws_blank_line(prev_eol + 1, ptr - prev_eol, ws_rule)) | |
267 | break; | |
268 | cnt++; | |
269 | ptr = prev_eol - 1; | |
270 | } | |
271 | return cnt; | |
272 | } | |
273 | ||
274 | static void check_blank_at_eof(mmfile_t *mf1, mmfile_t *mf2, | |
275 | struct emit_callback *ecbdata) | |
276 | { | |
277 | int l1, l2, at; | |
278 | unsigned ws_rule = ecbdata->ws_rule; | |
279 | l1 = count_trailing_blank(mf1, ws_rule); | |
280 | l2 = count_trailing_blank(mf2, ws_rule); | |
281 | if (l2 <= l1) { | |
282 | ecbdata->blank_at_eof_in_preimage = 0; | |
283 | ecbdata->blank_at_eof_in_postimage = 0; | |
284 | return; | |
285 | } | |
286 | at = count_lines(mf1->ptr, mf1->size); | |
287 | ecbdata->blank_at_eof_in_preimage = (at - l1) + 1; | |
288 | ||
289 | at = count_lines(mf2->ptr, mf2->size); | |
290 | ecbdata->blank_at_eof_in_postimage = (at - l2) + 1; | |
291 | } | |
292 | ||
293 | static void emit_line_0(struct diff_options *o, const char *set, const char *reset, | |
294 | int first, const char *line, int len) | |
295 | { | |
296 | int has_trailing_newline, has_trailing_carriage_return; | |
297 | int nofirst; | |
298 | FILE *file = o->file; | |
299 | ||
300 | if (o->output_prefix) { | |
301 | struct strbuf *msg = NULL; | |
302 | msg = o->output_prefix(o, o->output_prefix_data); | |
303 | assert(msg); | |
304 | fwrite(msg->buf, msg->len, 1, file); | |
305 | } | |
306 | ||
307 | if (len == 0) { | |
308 | has_trailing_newline = (first == '\n'); | |
309 | has_trailing_carriage_return = (!has_trailing_newline && | |
310 | (first == '\r')); | |
311 | nofirst = has_trailing_newline || has_trailing_carriage_return; | |
312 | } else { | |
313 | has_trailing_newline = (len > 0 && line[len-1] == '\n'); | |
314 | if (has_trailing_newline) | |
315 | len--; | |
316 | has_trailing_carriage_return = (len > 0 && line[len-1] == '\r'); | |
317 | if (has_trailing_carriage_return) | |
318 | len--; | |
319 | nofirst = 0; | |
320 | } | |
321 | ||
322 | if (len || !nofirst) { | |
323 | fputs(set, file); | |
324 | if (!nofirst) | |
325 | fputc(first, file); | |
326 | fwrite(line, len, 1, file); | |
327 | fputs(reset, file); | |
328 | } | |
329 | if (has_trailing_carriage_return) | |
330 | fputc('\r', file); | |
331 | if (has_trailing_newline) | |
332 | fputc('\n', file); | |
333 | } | |
334 | ||
335 | static void emit_line(struct diff_options *o, const char *set, const char *reset, | |
336 | const char *line, int len) | |
337 | { | |
338 | emit_line_0(o, set, reset, line[0], line+1, len-1); | |
339 | } | |
340 | ||
341 | static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line, int len) | |
342 | { | |
343 | if (!((ecbdata->ws_rule & WS_BLANK_AT_EOF) && | |
344 | ecbdata->blank_at_eof_in_preimage && | |
345 | ecbdata->blank_at_eof_in_postimage && | |
346 | ecbdata->blank_at_eof_in_preimage <= ecbdata->lno_in_preimage && | |
347 | ecbdata->blank_at_eof_in_postimage <= ecbdata->lno_in_postimage)) | |
348 | return 0; | |
349 | return ws_blank_line(line, len, ecbdata->ws_rule); | |
350 | } | |
351 | ||
352 | static void emit_add_line(const char *reset, | |
353 | struct emit_callback *ecbdata, | |
354 | const char *line, int len) | |
355 | { | |
356 | const char *ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE); | |
357 | const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_NEW); | |
358 | ||
359 | if (!*ws) | |
360 | emit_line_0(ecbdata->opt, set, reset, '+', line, len); | |
361 | else if (new_blank_line_at_eof(ecbdata, line, len)) | |
362 | /* Blank line at EOF - paint '+' as well */ | |
363 | emit_line_0(ecbdata->opt, ws, reset, '+', line, len); | |
364 | else { | |
365 | /* Emit just the prefix, then the rest. */ | |
366 | emit_line_0(ecbdata->opt, set, reset, '+', "", 0); | |
367 | ws_check_emit(line, len, ecbdata->ws_rule, | |
368 | ecbdata->opt->file, set, reset, ws); | |
369 | } | |
370 | } | |
371 | ||
372 | static void emit_hunk_header(struct emit_callback *ecbdata, | |
373 | const char *line, int len) | |
374 | { | |
375 | const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN); | |
376 | const char *frag = diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO); | |
377 | const char *func = diff_get_color(ecbdata->color_diff, DIFF_FUNCINFO); | |
378 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); | |
379 | static const char atat[2] = { '@', '@' }; | |
380 | const char *cp, *ep; | |
381 | struct strbuf msgbuf = STRBUF_INIT; | |
382 | int org_len = len; | |
383 | int i = 1; | |
384 | ||
385 | /* | |
386 | * As a hunk header must begin with "@@ -<old>, +<new> @@", | |
387 | * it always is at least 10 bytes long. | |
388 | */ | |
389 | if (len < 10 || | |
390 | memcmp(line, atat, 2) || | |
391 | !(ep = memmem(line + 2, len - 2, atat, 2))) { | |
392 | emit_line(ecbdata->opt, plain, reset, line, len); | |
393 | return; | |
394 | } | |
395 | ep += 2; /* skip over @@ */ | |
396 | ||
397 | /* The hunk header in fraginfo color */ | |
398 | strbuf_add(&msgbuf, frag, strlen(frag)); | |
399 | strbuf_add(&msgbuf, line, ep - line); | |
400 | strbuf_add(&msgbuf, reset, strlen(reset)); | |
401 | ||
402 | /* | |
403 | * trailing "\r\n" | |
404 | */ | |
405 | for ( ; i < 3; i++) | |
406 | if (line[len - i] == '\r' || line[len - i] == '\n') | |
407 | len--; | |
408 | ||
409 | /* blank before the func header */ | |
410 | for (cp = ep; ep - line < len; ep++) | |
411 | if (*ep != ' ' && *ep != '\t') | |
412 | break; | |
413 | if (ep != cp) { | |
414 | strbuf_add(&msgbuf, plain, strlen(plain)); | |
415 | strbuf_add(&msgbuf, cp, ep - cp); | |
416 | strbuf_add(&msgbuf, reset, strlen(reset)); | |
417 | } | |
418 | ||
419 | if (ep < line + len) { | |
420 | strbuf_add(&msgbuf, func, strlen(func)); | |
421 | strbuf_add(&msgbuf, ep, line + len - ep); | |
422 | strbuf_add(&msgbuf, reset, strlen(reset)); | |
423 | } | |
424 | ||
425 | strbuf_add(&msgbuf, line + len, org_len - len); | |
426 | emit_line(ecbdata->opt, "", "", msgbuf.buf, msgbuf.len); | |
427 | strbuf_release(&msgbuf); | |
428 | } | |
429 | ||
430 | static struct diff_tempfile *claim_diff_tempfile(void) { | |
431 | int i; | |
432 | for (i = 0; i < ARRAY_SIZE(diff_temp); i++) | |
433 | if (!diff_temp[i].name) | |
434 | return diff_temp + i; | |
435 | die("BUG: diff is failing to clean up its tempfiles"); | |
436 | } | |
437 | ||
438 | static int remove_tempfile_installed; | |
439 | ||
440 | static void remove_tempfile(void) | |
441 | { | |
442 | int i; | |
443 | for (i = 0; i < ARRAY_SIZE(diff_temp); i++) { | |
444 | if (diff_temp[i].name == diff_temp[i].tmp_path) | |
445 | unlink_or_warn(diff_temp[i].name); | |
446 | diff_temp[i].name = NULL; | |
447 | } | |
448 | } | |
449 | ||
450 | static void remove_tempfile_on_signal(int signo) | |
451 | { | |
452 | remove_tempfile(); | |
453 | sigchain_pop(signo); | |
454 | raise(signo); | |
455 | } | |
456 | ||
457 | static void print_line_count(FILE *file, int count) | |
458 | { | |
459 | switch (count) { | |
460 | case 0: | |
461 | fprintf(file, "0,0"); | |
462 | break; | |
463 | case 1: | |
464 | fprintf(file, "1"); | |
465 | break; | |
466 | default: | |
467 | fprintf(file, "1,%d", count); | |
468 | break; | |
469 | } | |
470 | } | |
471 | ||
472 | static void emit_rewrite_lines(struct emit_callback *ecb, | |
473 | int prefix, const char *data, int size) | |
474 | { | |
475 | const char *endp = NULL; | |
476 | static const char *nneof = " No newline at end of file\n"; | |
477 | const char *old = diff_get_color(ecb->color_diff, DIFF_FILE_OLD); | |
478 | const char *reset = diff_get_color(ecb->color_diff, DIFF_RESET); | |
479 | ||
480 | while (0 < size) { | |
481 | int len; | |
482 | ||
483 | endp = memchr(data, '\n', size); | |
484 | len = endp ? (endp - data + 1) : size; | |
485 | if (prefix != '+') { | |
486 | ecb->lno_in_preimage++; | |
487 | emit_line_0(ecb->opt, old, reset, '-', | |
488 | data, len); | |
489 | } else { | |
490 | ecb->lno_in_postimage++; | |
491 | emit_add_line(reset, ecb, data, len); | |
492 | } | |
493 | size -= len; | |
494 | data += len; | |
495 | } | |
496 | if (!endp) { | |
497 | const char *plain = diff_get_color(ecb->color_diff, | |
498 | DIFF_PLAIN); | |
499 | emit_line_0(ecb->opt, plain, reset, '\\', | |
500 | nneof, strlen(nneof)); | |
501 | } | |
502 | } | |
503 | ||
504 | static void emit_rewrite_diff(const char *name_a, | |
505 | const char *name_b, | |
506 | struct diff_filespec *one, | |
507 | struct diff_filespec *two, | |
508 | struct userdiff_driver *textconv_one, | |
509 | struct userdiff_driver *textconv_two, | |
510 | struct diff_options *o) | |
511 | { | |
512 | int lc_a, lc_b; | |
513 | int color_diff = DIFF_OPT_TST(o, COLOR_DIFF); | |
514 | const char *name_a_tab, *name_b_tab; | |
515 | const char *metainfo = diff_get_color(color_diff, DIFF_METAINFO); | |
516 | const char *fraginfo = diff_get_color(color_diff, DIFF_FRAGINFO); | |
517 | const char *reset = diff_get_color(color_diff, DIFF_RESET); | |
518 | static struct strbuf a_name = STRBUF_INIT, b_name = STRBUF_INIT; | |
519 | const char *a_prefix, *b_prefix; | |
520 | char *data_one, *data_two; | |
521 | size_t size_one, size_two; | |
522 | struct emit_callback ecbdata; | |
523 | char *line_prefix = ""; | |
524 | struct strbuf *msgbuf; | |
525 | ||
526 | if (o && o->output_prefix) { | |
527 | msgbuf = o->output_prefix(o, o->output_prefix_data); | |
528 | line_prefix = msgbuf->buf; | |
529 | } | |
530 | ||
531 | if (diff_mnemonic_prefix && DIFF_OPT_TST(o, REVERSE_DIFF)) { | |
532 | a_prefix = o->b_prefix; | |
533 | b_prefix = o->a_prefix; | |
534 | } else { | |
535 | a_prefix = o->a_prefix; | |
536 | b_prefix = o->b_prefix; | |
537 | } | |
538 | ||
539 | name_a += (*name_a == '/'); | |
540 | name_b += (*name_b == '/'); | |
541 | name_a_tab = strchr(name_a, ' ') ? "\t" : ""; | |
542 | name_b_tab = strchr(name_b, ' ') ? "\t" : ""; | |
543 | ||
544 | strbuf_reset(&a_name); | |
545 | strbuf_reset(&b_name); | |
546 | quote_two_c_style(&a_name, a_prefix, name_a, 0); | |
547 | quote_two_c_style(&b_name, b_prefix, name_b, 0); | |
548 | ||
549 | size_one = fill_textconv(textconv_one, one, &data_one); | |
550 | size_two = fill_textconv(textconv_two, two, &data_two); | |
551 | ||
552 | memset(&ecbdata, 0, sizeof(ecbdata)); | |
553 | ecbdata.color_diff = color_diff; | |
554 | ecbdata.found_changesp = &o->found_changes; | |
555 | ecbdata.ws_rule = whitespace_rule(name_b ? name_b : name_a); | |
556 | ecbdata.opt = o; | |
557 | if (ecbdata.ws_rule & WS_BLANK_AT_EOF) { | |
558 | mmfile_t mf1, mf2; | |
559 | mf1.ptr = (char *)data_one; | |
560 | mf2.ptr = (char *)data_two; | |
561 | mf1.size = size_one; | |
562 | mf2.size = size_two; | |
563 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
564 | } | |
565 | ecbdata.lno_in_preimage = 1; | |
566 | ecbdata.lno_in_postimage = 1; | |
567 | ||
568 | lc_a = count_lines(data_one, size_one); | |
569 | lc_b = count_lines(data_two, size_two); | |
570 | fprintf(o->file, | |
571 | "%s%s--- %s%s%s\n%s%s+++ %s%s%s\n%s%s@@ -", | |
572 | line_prefix, metainfo, a_name.buf, name_a_tab, reset, | |
573 | line_prefix, metainfo, b_name.buf, name_b_tab, reset, | |
574 | line_prefix, fraginfo); | |
575 | print_line_count(o->file, lc_a); | |
576 | fprintf(o->file, " +"); | |
577 | print_line_count(o->file, lc_b); | |
578 | fprintf(o->file, " @@%s\n", reset); | |
579 | if (lc_a) | |
580 | emit_rewrite_lines(&ecbdata, '-', data_one, size_one); | |
581 | if (lc_b) | |
582 | emit_rewrite_lines(&ecbdata, '+', data_two, size_two); | |
583 | if (textconv_one) | |
584 | free((char *)data_one); | |
585 | if (textconv_two) | |
586 | free((char *)data_two); | |
587 | } | |
588 | ||
589 | struct diff_words_buffer { | |
590 | mmfile_t text; | |
591 | long alloc; | |
592 | struct diff_words_orig { | |
593 | const char *begin, *end; | |
594 | } *orig; | |
595 | int orig_nr, orig_alloc; | |
596 | }; | |
597 | ||
598 | static void diff_words_append(char *line, unsigned long len, | |
599 | struct diff_words_buffer *buffer) | |
600 | { | |
601 | ALLOC_GROW(buffer->text.ptr, buffer->text.size + len, buffer->alloc); | |
602 | line++; | |
603 | len--; | |
604 | memcpy(buffer->text.ptr + buffer->text.size, line, len); | |
605 | buffer->text.size += len; | |
606 | buffer->text.ptr[buffer->text.size] = '\0'; | |
607 | } | |
608 | ||
609 | struct diff_words_style_elem | |
610 | { | |
611 | const char *prefix; | |
612 | const char *suffix; | |
613 | const char *color; /* NULL; filled in by the setup code if | |
614 | * color is enabled */ | |
615 | }; | |
616 | ||
617 | struct diff_words_style | |
618 | { | |
619 | enum diff_words_type type; | |
620 | struct diff_words_style_elem new, old, ctx; | |
621 | const char *newline; | |
622 | }; | |
623 | ||
624 | struct diff_words_style diff_words_styles[] = { | |
625 | { DIFF_WORDS_PORCELAIN, {"+", "\n"}, {"-", "\n"}, {" ", "\n"}, "~\n" }, | |
626 | { DIFF_WORDS_PLAIN, {"{+", "+}"}, {"[-", "-]"}, {"", ""}, "\n" }, | |
627 | { DIFF_WORDS_COLOR, {"", ""}, {"", ""}, {"", ""}, "\n" } | |
628 | }; | |
629 | ||
630 | struct diff_words_data { | |
631 | struct diff_words_buffer minus, plus; | |
632 | const char *current_plus; | |
633 | int last_minus; | |
634 | struct diff_options *opt; | |
635 | regex_t *word_regex; | |
636 | enum diff_words_type type; | |
637 | struct diff_words_style *style; | |
638 | }; | |
639 | ||
640 | static int fn_out_diff_words_write_helper(FILE *fp, | |
641 | struct diff_words_style_elem *st_el, | |
642 | const char *newline, | |
643 | size_t count, const char *buf, | |
644 | const char *line_prefix) | |
645 | { | |
646 | int print = 0; | |
647 | ||
648 | while (count) { | |
649 | char *p = memchr(buf, '\n', count); | |
650 | if (print) | |
651 | fputs(line_prefix, fp); | |
652 | if (p != buf) { | |
653 | if (st_el->color && fputs(st_el->color, fp) < 0) | |
654 | return -1; | |
655 | if (fputs(st_el->prefix, fp) < 0 || | |
656 | fwrite(buf, p ? p - buf : count, 1, fp) != 1 || | |
657 | fputs(st_el->suffix, fp) < 0) | |
658 | return -1; | |
659 | if (st_el->color && *st_el->color | |
660 | && fputs(GIT_COLOR_RESET, fp) < 0) | |
661 | return -1; | |
662 | } | |
663 | if (!p) | |
664 | return 0; | |
665 | if (fputs(newline, fp) < 0) | |
666 | return -1; | |
667 | count -= p + 1 - buf; | |
668 | buf = p + 1; | |
669 | print = 1; | |
670 | } | |
671 | return 0; | |
672 | } | |
673 | ||
674 | /* | |
675 | * '--color-words' algorithm can be described as: | |
676 | * | |
677 | * 1. collect a the minus/plus lines of a diff hunk, divided into | |
678 | * minus-lines and plus-lines; | |
679 | * | |
680 | * 2. break both minus-lines and plus-lines into words and | |
681 | * place them into two mmfile_t with one word for each line; | |
682 | * | |
683 | * 3. use xdiff to run diff on the two mmfile_t to get the words level diff; | |
684 | * | |
685 | * And for the common parts of the both file, we output the plus side text. | |
686 | * diff_words->current_plus is used to trace the current position of the plus file | |
687 | * which printed. diff_words->last_minus is used to trace the last minus word | |
688 | * printed. | |
689 | * | |
690 | * For '--graph' to work with '--color-words', we need to output the graph prefix | |
691 | * on each line of color words output. Generally, there are two conditions on | |
692 | * which we should output the prefix. | |
693 | * | |
694 | * 1. diff_words->last_minus == 0 && | |
695 | * diff_words->current_plus == diff_words->plus.text.ptr | |
696 | * | |
697 | * that is: the plus text must start as a new line, and if there is no minus | |
698 | * word printed, a graph prefix must be printed. | |
699 | * | |
700 | * 2. diff_words->current_plus > diff_words->plus.text.ptr && | |
701 | * *(diff_words->current_plus - 1) == '\n' | |
702 | * | |
703 | * that is: a graph prefix must be printed following a '\n' | |
704 | */ | |
705 | static int color_words_output_graph_prefix(struct diff_words_data *diff_words) | |
706 | { | |
707 | if ((diff_words->last_minus == 0 && | |
708 | diff_words->current_plus == diff_words->plus.text.ptr) || | |
709 | (diff_words->current_plus > diff_words->plus.text.ptr && | |
710 | *(diff_words->current_plus - 1) == '\n')) { | |
711 | return 1; | |
712 | } else { | |
713 | return 0; | |
714 | } | |
715 | } | |
716 | ||
717 | static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len) | |
718 | { | |
719 | struct diff_words_data *diff_words = priv; | |
720 | struct diff_words_style *style = diff_words->style; | |
721 | int minus_first, minus_len, plus_first, plus_len; | |
722 | const char *minus_begin, *minus_end, *plus_begin, *plus_end; | |
723 | struct diff_options *opt = diff_words->opt; | |
724 | struct strbuf *msgbuf; | |
725 | char *line_prefix = ""; | |
726 | ||
727 | if (line[0] != '@' || parse_hunk_header(line, len, | |
728 | &minus_first, &minus_len, &plus_first, &plus_len)) | |
729 | return; | |
730 | ||
731 | assert(opt); | |
732 | if (opt->output_prefix) { | |
733 | msgbuf = opt->output_prefix(opt, opt->output_prefix_data); | |
734 | line_prefix = msgbuf->buf; | |
735 | } | |
736 | ||
737 | /* POSIX requires that first be decremented by one if len == 0... */ | |
738 | if (minus_len) { | |
739 | minus_begin = diff_words->minus.orig[minus_first].begin; | |
740 | minus_end = | |
741 | diff_words->minus.orig[minus_first + minus_len - 1].end; | |
742 | } else | |
743 | minus_begin = minus_end = | |
744 | diff_words->minus.orig[minus_first].end; | |
745 | ||
746 | if (plus_len) { | |
747 | plus_begin = diff_words->plus.orig[plus_first].begin; | |
748 | plus_end = diff_words->plus.orig[plus_first + plus_len - 1].end; | |
749 | } else | |
750 | plus_begin = plus_end = diff_words->plus.orig[plus_first].end; | |
751 | ||
752 | if (color_words_output_graph_prefix(diff_words)) { | |
753 | fputs(line_prefix, diff_words->opt->file); | |
754 | } | |
755 | if (diff_words->current_plus != plus_begin) { | |
756 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
757 | &style->ctx, style->newline, | |
758 | plus_begin - diff_words->current_plus, | |
759 | diff_words->current_plus, line_prefix); | |
760 | if (*(plus_begin - 1) == '\n') | |
761 | fputs(line_prefix, diff_words->opt->file); | |
762 | } | |
763 | if (minus_begin != minus_end) { | |
764 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
765 | &style->old, style->newline, | |
766 | minus_end - minus_begin, minus_begin, | |
767 | line_prefix); | |
768 | } | |
769 | if (plus_begin != plus_end) { | |
770 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
771 | &style->new, style->newline, | |
772 | plus_end - plus_begin, plus_begin, | |
773 | line_prefix); | |
774 | } | |
775 | ||
776 | diff_words->current_plus = plus_end; | |
777 | diff_words->last_minus = minus_first; | |
778 | } | |
779 | ||
780 | /* This function starts looking at *begin, and returns 0 iff a word was found. */ | |
781 | static int find_word_boundaries(mmfile_t *buffer, regex_t *word_regex, | |
782 | int *begin, int *end) | |
783 | { | |
784 | if (word_regex && *begin < buffer->size) { | |
785 | regmatch_t match[1]; | |
786 | if (!regexec(word_regex, buffer->ptr + *begin, 1, match, 0)) { | |
787 | char *p = memchr(buffer->ptr + *begin + match[0].rm_so, | |
788 | '\n', match[0].rm_eo - match[0].rm_so); | |
789 | *end = p ? p - buffer->ptr : match[0].rm_eo + *begin; | |
790 | *begin += match[0].rm_so; | |
791 | return *begin >= *end; | |
792 | } | |
793 | return -1; | |
794 | } | |
795 | ||
796 | /* find the next word */ | |
797 | while (*begin < buffer->size && isspace(buffer->ptr[*begin])) | |
798 | (*begin)++; | |
799 | if (*begin >= buffer->size) | |
800 | return -1; | |
801 | ||
802 | /* find the end of the word */ | |
803 | *end = *begin + 1; | |
804 | while (*end < buffer->size && !isspace(buffer->ptr[*end])) | |
805 | (*end)++; | |
806 | ||
807 | return 0; | |
808 | } | |
809 | ||
810 | /* | |
811 | * This function splits the words in buffer->text, stores the list with | |
812 | * newline separator into out, and saves the offsets of the original words | |
813 | * in buffer->orig. | |
814 | */ | |
815 | static void diff_words_fill(struct diff_words_buffer *buffer, mmfile_t *out, | |
816 | regex_t *word_regex) | |
817 | { | |
818 | int i, j; | |
819 | long alloc = 0; | |
820 | ||
821 | out->size = 0; | |
822 | out->ptr = NULL; | |
823 | ||
824 | /* fake an empty "0th" word */ | |
825 | ALLOC_GROW(buffer->orig, 1, buffer->orig_alloc); | |
826 | buffer->orig[0].begin = buffer->orig[0].end = buffer->text.ptr; | |
827 | buffer->orig_nr = 1; | |
828 | ||
829 | for (i = 0; i < buffer->text.size; i++) { | |
830 | if (find_word_boundaries(&buffer->text, word_regex, &i, &j)) | |
831 | return; | |
832 | ||
833 | /* store original boundaries */ | |
834 | ALLOC_GROW(buffer->orig, buffer->orig_nr + 1, | |
835 | buffer->orig_alloc); | |
836 | buffer->orig[buffer->orig_nr].begin = buffer->text.ptr + i; | |
837 | buffer->orig[buffer->orig_nr].end = buffer->text.ptr + j; | |
838 | buffer->orig_nr++; | |
839 | ||
840 | /* store one word */ | |
841 | ALLOC_GROW(out->ptr, out->size + j - i + 1, alloc); | |
842 | memcpy(out->ptr + out->size, buffer->text.ptr + i, j - i); | |
843 | out->ptr[out->size + j - i] = '\n'; | |
844 | out->size += j - i + 1; | |
845 | ||
846 | i = j - 1; | |
847 | } | |
848 | } | |
849 | ||
850 | /* this executes the word diff on the accumulated buffers */ | |
851 | static void diff_words_show(struct diff_words_data *diff_words) | |
852 | { | |
853 | xpparam_t xpp; | |
854 | xdemitconf_t xecfg; | |
855 | mmfile_t minus, plus; | |
856 | struct diff_words_style *style = diff_words->style; | |
857 | ||
858 | struct diff_options *opt = diff_words->opt; | |
859 | struct strbuf *msgbuf; | |
860 | char *line_prefix = ""; | |
861 | ||
862 | assert(opt); | |
863 | if (opt->output_prefix) { | |
864 | msgbuf = opt->output_prefix(opt, opt->output_prefix_data); | |
865 | line_prefix = msgbuf->buf; | |
866 | } | |
867 | ||
868 | /* special case: only removal */ | |
869 | if (!diff_words->plus.text.size) { | |
870 | fputs(line_prefix, diff_words->opt->file); | |
871 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
872 | &style->old, style->newline, | |
873 | diff_words->minus.text.size, | |
874 | diff_words->minus.text.ptr, line_prefix); | |
875 | diff_words->minus.text.size = 0; | |
876 | return; | |
877 | } | |
878 | ||
879 | diff_words->current_plus = diff_words->plus.text.ptr; | |
880 | diff_words->last_minus = 0; | |
881 | ||
882 | memset(&xpp, 0, sizeof(xpp)); | |
883 | memset(&xecfg, 0, sizeof(xecfg)); | |
884 | diff_words_fill(&diff_words->minus, &minus, diff_words->word_regex); | |
885 | diff_words_fill(&diff_words->plus, &plus, diff_words->word_regex); | |
886 | xpp.flags = 0; | |
887 | /* as only the hunk header will be parsed, we need a 0-context */ | |
888 | xecfg.ctxlen = 0; | |
889 | xdi_diff_outf(&minus, &plus, fn_out_diff_words_aux, diff_words, | |
890 | &xpp, &xecfg); | |
891 | free(minus.ptr); | |
892 | free(plus.ptr); | |
893 | if (diff_words->current_plus != diff_words->plus.text.ptr + | |
894 | diff_words->plus.text.size) { | |
895 | if (color_words_output_graph_prefix(diff_words)) | |
896 | fputs(line_prefix, diff_words->opt->file); | |
897 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
898 | &style->ctx, style->newline, | |
899 | diff_words->plus.text.ptr + diff_words->plus.text.size | |
900 | - diff_words->current_plus, diff_words->current_plus, | |
901 | line_prefix); | |
902 | } | |
903 | diff_words->minus.text.size = diff_words->plus.text.size = 0; | |
904 | } | |
905 | ||
906 | /* In "color-words" mode, show word-diff of words accumulated in the buffer */ | |
907 | static void diff_words_flush(struct emit_callback *ecbdata) | |
908 | { | |
909 | if (ecbdata->diff_words->minus.text.size || | |
910 | ecbdata->diff_words->plus.text.size) | |
911 | diff_words_show(ecbdata->diff_words); | |
912 | } | |
913 | ||
914 | static void free_diff_words_data(struct emit_callback *ecbdata) | |
915 | { | |
916 | if (ecbdata->diff_words) { | |
917 | diff_words_flush(ecbdata); | |
918 | free (ecbdata->diff_words->minus.text.ptr); | |
919 | free (ecbdata->diff_words->minus.orig); | |
920 | free (ecbdata->diff_words->plus.text.ptr); | |
921 | free (ecbdata->diff_words->plus.orig); | |
922 | if (ecbdata->diff_words->word_regex) { | |
923 | regfree(ecbdata->diff_words->word_regex); | |
924 | free(ecbdata->diff_words->word_regex); | |
925 | } | |
926 | free(ecbdata->diff_words); | |
927 | ecbdata->diff_words = NULL; | |
928 | } | |
929 | } | |
930 | ||
931 | const char *diff_get_color(int diff_use_color, enum color_diff ix) | |
932 | { | |
933 | if (diff_use_color) | |
934 | return diff_colors[ix]; | |
935 | return ""; | |
936 | } | |
937 | ||
938 | static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, unsigned long len) | |
939 | { | |
940 | const char *cp; | |
941 | unsigned long allot; | |
942 | size_t l = len; | |
943 | ||
944 | if (ecb->truncate) | |
945 | return ecb->truncate(line, len); | |
946 | cp = line; | |
947 | allot = l; | |
948 | while (0 < l) { | |
949 | (void) utf8_width(&cp, &l); | |
950 | if (!cp) | |
951 | break; /* truncated in the middle? */ | |
952 | } | |
953 | return allot - l; | |
954 | } | |
955 | ||
956 | static void find_lno(const char *line, struct emit_callback *ecbdata) | |
957 | { | |
958 | const char *p; | |
959 | ecbdata->lno_in_preimage = 0; | |
960 | ecbdata->lno_in_postimage = 0; | |
961 | p = strchr(line, '-'); | |
962 | if (!p) | |
963 | return; /* cannot happen */ | |
964 | ecbdata->lno_in_preimage = strtol(p + 1, NULL, 10); | |
965 | p = strchr(p, '+'); | |
966 | if (!p) | |
967 | return; /* cannot happen */ | |
968 | ecbdata->lno_in_postimage = strtol(p + 1, NULL, 10); | |
969 | } | |
970 | ||
971 | static void fn_out_consume(void *priv, char *line, unsigned long len) | |
972 | { | |
973 | struct emit_callback *ecbdata = priv; | |
974 | const char *meta = diff_get_color(ecbdata->color_diff, DIFF_METAINFO); | |
975 | const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN); | |
976 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); | |
977 | struct diff_options *o = ecbdata->opt; | |
978 | char *line_prefix = ""; | |
979 | struct strbuf *msgbuf; | |
980 | ||
981 | if (o && o->output_prefix) { | |
982 | msgbuf = o->output_prefix(o, o->output_prefix_data); | |
983 | line_prefix = msgbuf->buf; | |
984 | } | |
985 | ||
986 | if (ecbdata->header) { | |
987 | fprintf(ecbdata->opt->file, "%s", ecbdata->header->buf); | |
988 | strbuf_reset(ecbdata->header); | |
989 | ecbdata->header = NULL; | |
990 | } | |
991 | *(ecbdata->found_changesp) = 1; | |
992 | ||
993 | if (ecbdata->label_path[0]) { | |
994 | const char *name_a_tab, *name_b_tab; | |
995 | ||
996 | name_a_tab = strchr(ecbdata->label_path[0], ' ') ? "\t" : ""; | |
997 | name_b_tab = strchr(ecbdata->label_path[1], ' ') ? "\t" : ""; | |
998 | ||
999 | fprintf(ecbdata->opt->file, "%s%s--- %s%s%s\n", | |
1000 | line_prefix, meta, ecbdata->label_path[0], reset, name_a_tab); | |
1001 | fprintf(ecbdata->opt->file, "%s%s+++ %s%s%s\n", | |
1002 | line_prefix, meta, ecbdata->label_path[1], reset, name_b_tab); | |
1003 | ecbdata->label_path[0] = ecbdata->label_path[1] = NULL; | |
1004 | } | |
1005 | ||
1006 | if (diff_suppress_blank_empty | |
1007 | && len == 2 && line[0] == ' ' && line[1] == '\n') { | |
1008 | line[0] = '\n'; | |
1009 | len = 1; | |
1010 | } | |
1011 | ||
1012 | if (line[0] == '@') { | |
1013 | if (ecbdata->diff_words) | |
1014 | diff_words_flush(ecbdata); | |
1015 | len = sane_truncate_line(ecbdata, line, len); | |
1016 | find_lno(line, ecbdata); | |
1017 | emit_hunk_header(ecbdata, line, len); | |
1018 | if (line[len-1] != '\n') | |
1019 | putc('\n', ecbdata->opt->file); | |
1020 | return; | |
1021 | } | |
1022 | ||
1023 | if (len < 1) { | |
1024 | emit_line(ecbdata->opt, reset, reset, line, len); | |
1025 | if (ecbdata->diff_words | |
1026 | && ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) | |
1027 | fputs("~\n", ecbdata->opt->file); | |
1028 | return; | |
1029 | } | |
1030 | ||
1031 | if (ecbdata->diff_words) { | |
1032 | if (line[0] == '-') { | |
1033 | diff_words_append(line, len, | |
1034 | &ecbdata->diff_words->minus); | |
1035 | return; | |
1036 | } else if (line[0] == '+') { | |
1037 | diff_words_append(line, len, | |
1038 | &ecbdata->diff_words->plus); | |
1039 | return; | |
1040 | } | |
1041 | diff_words_flush(ecbdata); | |
1042 | if (ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) { | |
1043 | emit_line(ecbdata->opt, plain, reset, line, len); | |
1044 | fputs("~\n", ecbdata->opt->file); | |
1045 | } else { | |
1046 | /* don't print the prefix character */ | |
1047 | emit_line(ecbdata->opt, plain, reset, line+1, len-1); | |
1048 | } | |
1049 | return; | |
1050 | } | |
1051 | ||
1052 | if (line[0] != '+') { | |
1053 | const char *color = | |
1054 | diff_get_color(ecbdata->color_diff, | |
1055 | line[0] == '-' ? DIFF_FILE_OLD : DIFF_PLAIN); | |
1056 | ecbdata->lno_in_preimage++; | |
1057 | if (line[0] == ' ') | |
1058 | ecbdata->lno_in_postimage++; | |
1059 | emit_line(ecbdata->opt, color, reset, line, len); | |
1060 | } else { | |
1061 | ecbdata->lno_in_postimage++; | |
1062 | emit_add_line(reset, ecbdata, line + 1, len - 1); | |
1063 | } | |
1064 | } | |
1065 | ||
1066 | static char *pprint_rename(const char *a, const char *b) | |
1067 | { | |
1068 | const char *old = a; | |
1069 | const char *new = b; | |
1070 | struct strbuf name = STRBUF_INIT; | |
1071 | int pfx_length, sfx_length; | |
1072 | int len_a = strlen(a); | |
1073 | int len_b = strlen(b); | |
1074 | int a_midlen, b_midlen; | |
1075 | int qlen_a = quote_c_style(a, NULL, NULL, 0); | |
1076 | int qlen_b = quote_c_style(b, NULL, NULL, 0); | |
1077 | ||
1078 | if (qlen_a || qlen_b) { | |
1079 | quote_c_style(a, &name, NULL, 0); | |
1080 | strbuf_addstr(&name, " => "); | |
1081 | quote_c_style(b, &name, NULL, 0); | |
1082 | return strbuf_detach(&name, NULL); | |
1083 | } | |
1084 | ||
1085 | /* Find common prefix */ | |
1086 | pfx_length = 0; | |
1087 | while (*old && *new && *old == *new) { | |
1088 | if (*old == '/') | |
1089 | pfx_length = old - a + 1; | |
1090 | old++; | |
1091 | new++; | |
1092 | } | |
1093 | ||
1094 | /* Find common suffix */ | |
1095 | old = a + len_a; | |
1096 | new = b + len_b; | |
1097 | sfx_length = 0; | |
1098 | while (a <= old && b <= new && *old == *new) { | |
1099 | if (*old == '/') | |
1100 | sfx_length = len_a - (old - a); | |
1101 | old--; | |
1102 | new--; | |
1103 | } | |
1104 | ||
1105 | /* | |
1106 | * pfx{mid-a => mid-b}sfx | |
1107 | * {pfx-a => pfx-b}sfx | |
1108 | * pfx{sfx-a => sfx-b} | |
1109 | * name-a => name-b | |
1110 | */ | |
1111 | a_midlen = len_a - pfx_length - sfx_length; | |
1112 | b_midlen = len_b - pfx_length - sfx_length; | |
1113 | if (a_midlen < 0) | |
1114 | a_midlen = 0; | |
1115 | if (b_midlen < 0) | |
1116 | b_midlen = 0; | |
1117 | ||
1118 | strbuf_grow(&name, pfx_length + a_midlen + b_midlen + sfx_length + 7); | |
1119 | if (pfx_length + sfx_length) { | |
1120 | strbuf_add(&name, a, pfx_length); | |
1121 | strbuf_addch(&name, '{'); | |
1122 | } | |
1123 | strbuf_add(&name, a + pfx_length, a_midlen); | |
1124 | strbuf_addstr(&name, " => "); | |
1125 | strbuf_add(&name, b + pfx_length, b_midlen); | |
1126 | if (pfx_length + sfx_length) { | |
1127 | strbuf_addch(&name, '}'); | |
1128 | strbuf_add(&name, a + len_a - sfx_length, sfx_length); | |
1129 | } | |
1130 | return strbuf_detach(&name, NULL); | |
1131 | } | |
1132 | ||
1133 | struct diffstat_t { | |
1134 | int nr; | |
1135 | int alloc; | |
1136 | struct diffstat_file { | |
1137 | char *from_name; | |
1138 | char *name; | |
1139 | char *print_name; | |
1140 | unsigned is_unmerged:1; | |
1141 | unsigned is_binary:1; | |
1142 | unsigned is_renamed:1; | |
1143 | uintmax_t added, deleted; | |
1144 | } **files; | |
1145 | }; | |
1146 | ||
1147 | static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat, | |
1148 | const char *name_a, | |
1149 | const char *name_b) | |
1150 | { | |
1151 | struct diffstat_file *x; | |
1152 | x = xcalloc(sizeof (*x), 1); | |
1153 | if (diffstat->nr == diffstat->alloc) { | |
1154 | diffstat->alloc = alloc_nr(diffstat->alloc); | |
1155 | diffstat->files = xrealloc(diffstat->files, | |
1156 | diffstat->alloc * sizeof(x)); | |
1157 | } | |
1158 | diffstat->files[diffstat->nr++] = x; | |
1159 | if (name_b) { | |
1160 | x->from_name = xstrdup(name_a); | |
1161 | x->name = xstrdup(name_b); | |
1162 | x->is_renamed = 1; | |
1163 | } | |
1164 | else { | |
1165 | x->from_name = NULL; | |
1166 | x->name = xstrdup(name_a); | |
1167 | } | |
1168 | return x; | |
1169 | } | |
1170 | ||
1171 | static void diffstat_consume(void *priv, char *line, unsigned long len) | |
1172 | { | |
1173 | struct diffstat_t *diffstat = priv; | |
1174 | struct diffstat_file *x = diffstat->files[diffstat->nr - 1]; | |
1175 | ||
1176 | if (line[0] == '+') | |
1177 | x->added++; | |
1178 | else if (line[0] == '-') | |
1179 | x->deleted++; | |
1180 | } | |
1181 | ||
1182 | const char mime_boundary_leader[] = "------------"; | |
1183 | ||
1184 | static int scale_linear(int it, int width, int max_change) | |
1185 | { | |
1186 | /* | |
1187 | * make sure that at least one '-' is printed if there were deletions, | |
1188 | * and likewise for '+'. | |
1189 | */ | |
1190 | if (max_change < 2) | |
1191 | return it; | |
1192 | return ((it - 1) * (width - 1) + max_change - 1) / (max_change - 1); | |
1193 | } | |
1194 | ||
1195 | static void show_name(FILE *file, | |
1196 | const char *prefix, const char *name, int len) | |
1197 | { | |
1198 | fprintf(file, " %s%-*s |", prefix, len, name); | |
1199 | } | |
1200 | ||
1201 | static void show_graph(FILE *file, char ch, int cnt, const char *set, const char *reset) | |
1202 | { | |
1203 | if (cnt <= 0) | |
1204 | return; | |
1205 | fprintf(file, "%s", set); | |
1206 | while (cnt--) | |
1207 | putc(ch, file); | |
1208 | fprintf(file, "%s", reset); | |
1209 | } | |
1210 | ||
1211 | static void fill_print_name(struct diffstat_file *file) | |
1212 | { | |
1213 | char *pname; | |
1214 | ||
1215 | if (file->print_name) | |
1216 | return; | |
1217 | ||
1218 | if (!file->is_renamed) { | |
1219 | struct strbuf buf = STRBUF_INIT; | |
1220 | if (quote_c_style(file->name, &buf, NULL, 0)) { | |
1221 | pname = strbuf_detach(&buf, NULL); | |
1222 | } else { | |
1223 | pname = file->name; | |
1224 | strbuf_release(&buf); | |
1225 | } | |
1226 | } else { | |
1227 | pname = pprint_rename(file->from_name, file->name); | |
1228 | } | |
1229 | file->print_name = pname; | |
1230 | } | |
1231 | ||
1232 | static void show_stats(struct diffstat_t *data, struct diff_options *options) | |
1233 | { | |
1234 | int i, len, add, del, adds = 0, dels = 0; | |
1235 | uintmax_t max_change = 0, max_len = 0; | |
1236 | int total_files = data->nr; | |
1237 | int width, name_width; | |
1238 | const char *reset, *set, *add_c, *del_c; | |
1239 | const char *line_prefix = ""; | |
1240 | struct strbuf *msg = NULL; | |
1241 | ||
1242 | if (data->nr == 0) | |
1243 | return; | |
1244 | ||
1245 | if (options->output_prefix) { | |
1246 | msg = options->output_prefix(options, options->output_prefix_data); | |
1247 | line_prefix = msg->buf; | |
1248 | } | |
1249 | ||
1250 | width = options->stat_width ? options->stat_width : 80; | |
1251 | name_width = options->stat_name_width ? options->stat_name_width : 50; | |
1252 | ||
1253 | /* Sanity: give at least 5 columns to the graph, | |
1254 | * but leave at least 10 columns for the name. | |
1255 | */ | |
1256 | if (width < 25) | |
1257 | width = 25; | |
1258 | if (name_width < 10) | |
1259 | name_width = 10; | |
1260 | else if (width < name_width + 15) | |
1261 | name_width = width - 15; | |
1262 | ||
1263 | /* Find the longest filename and max number of changes */ | |
1264 | reset = diff_get_color_opt(options, DIFF_RESET); | |
1265 | set = diff_get_color_opt(options, DIFF_PLAIN); | |
1266 | add_c = diff_get_color_opt(options, DIFF_FILE_NEW); | |
1267 | del_c = diff_get_color_opt(options, DIFF_FILE_OLD); | |
1268 | ||
1269 | for (i = 0; i < data->nr; i++) { | |
1270 | struct diffstat_file *file = data->files[i]; | |
1271 | uintmax_t change = file->added + file->deleted; | |
1272 | fill_print_name(file); | |
1273 | len = strlen(file->print_name); | |
1274 | if (max_len < len) | |
1275 | max_len = len; | |
1276 | ||
1277 | if (file->is_binary || file->is_unmerged) | |
1278 | continue; | |
1279 | if (max_change < change) | |
1280 | max_change = change; | |
1281 | } | |
1282 | ||
1283 | /* Compute the width of the graph part; | |
1284 | * 10 is for one blank at the beginning of the line plus | |
1285 | * " | count " between the name and the graph. | |
1286 | * | |
1287 | * From here on, name_width is the width of the name area, | |
1288 | * and width is the width of the graph area. | |
1289 | */ | |
1290 | name_width = (name_width < max_len) ? name_width : max_len; | |
1291 | if (width < (name_width + 10) + max_change) | |
1292 | width = width - (name_width + 10); | |
1293 | else | |
1294 | width = max_change; | |
1295 | ||
1296 | for (i = 0; i < data->nr; i++) { | |
1297 | const char *prefix = ""; | |
1298 | char *name = data->files[i]->print_name; | |
1299 | uintmax_t added = data->files[i]->added; | |
1300 | uintmax_t deleted = data->files[i]->deleted; | |
1301 | int name_len; | |
1302 | ||
1303 | /* | |
1304 | * "scale" the filename | |
1305 | */ | |
1306 | len = name_width; | |
1307 | name_len = strlen(name); | |
1308 | if (name_width < name_len) { | |
1309 | char *slash; | |
1310 | prefix = "..."; | |
1311 | len -= 3; | |
1312 | name += name_len - len; | |
1313 | slash = strchr(name, '/'); | |
1314 | if (slash) | |
1315 | name = slash; | |
1316 | } | |
1317 | ||
1318 | if (data->files[i]->is_binary) { | |
1319 | fprintf(options->file, "%s", line_prefix); | |
1320 | show_name(options->file, prefix, name, len); | |
1321 | fprintf(options->file, " Bin "); | |
1322 | fprintf(options->file, "%s%"PRIuMAX"%s", | |
1323 | del_c, deleted, reset); | |
1324 | fprintf(options->file, " -> "); | |
1325 | fprintf(options->file, "%s%"PRIuMAX"%s", | |
1326 | add_c, added, reset); | |
1327 | fprintf(options->file, " bytes"); | |
1328 | fprintf(options->file, "\n"); | |
1329 | continue; | |
1330 | } | |
1331 | else if (data->files[i]->is_unmerged) { | |
1332 | fprintf(options->file, "%s", line_prefix); | |
1333 | show_name(options->file, prefix, name, len); | |
1334 | fprintf(options->file, " Unmerged\n"); | |
1335 | continue; | |
1336 | } | |
1337 | else if (!data->files[i]->is_renamed && | |
1338 | (added + deleted == 0)) { | |
1339 | total_files--; | |
1340 | continue; | |
1341 | } | |
1342 | ||
1343 | /* | |
1344 | * scale the add/delete | |
1345 | */ | |
1346 | add = added; | |
1347 | del = deleted; | |
1348 | adds += add; | |
1349 | dels += del; | |
1350 | ||
1351 | if (width <= max_change) { | |
1352 | add = scale_linear(add, width, max_change); | |
1353 | del = scale_linear(del, width, max_change); | |
1354 | } | |
1355 | fprintf(options->file, "%s", line_prefix); | |
1356 | show_name(options->file, prefix, name, len); | |
1357 | fprintf(options->file, "%5"PRIuMAX"%s", added + deleted, | |
1358 | added + deleted ? " " : ""); | |
1359 | show_graph(options->file, '+', add, add_c, reset); | |
1360 | show_graph(options->file, '-', del, del_c, reset); | |
1361 | fprintf(options->file, "\n"); | |
1362 | } | |
1363 | fprintf(options->file, "%s", line_prefix); | |
1364 | fprintf(options->file, | |
1365 | " %d files changed, %d insertions(+), %d deletions(-)\n", | |
1366 | total_files, adds, dels); | |
1367 | } | |
1368 | ||
1369 | static void show_shortstats(struct diffstat_t *data, struct diff_options *options) | |
1370 | { | |
1371 | int i, adds = 0, dels = 0, total_files = data->nr; | |
1372 | ||
1373 | if (data->nr == 0) | |
1374 | return; | |
1375 | ||
1376 | for (i = 0; i < data->nr; i++) { | |
1377 | if (!data->files[i]->is_binary && | |
1378 | !data->files[i]->is_unmerged) { | |
1379 | int added = data->files[i]->added; | |
1380 | int deleted= data->files[i]->deleted; | |
1381 | if (!data->files[i]->is_renamed && | |
1382 | (added + deleted == 0)) { | |
1383 | total_files--; | |
1384 | } else { | |
1385 | adds += added; | |
1386 | dels += deleted; | |
1387 | } | |
1388 | } | |
1389 | } | |
1390 | if (options->output_prefix) { | |
1391 | struct strbuf *msg = NULL; | |
1392 | msg = options->output_prefix(options, | |
1393 | options->output_prefix_data); | |
1394 | fprintf(options->file, "%s", msg->buf); | |
1395 | } | |
1396 | fprintf(options->file, " %d files changed, %d insertions(+), %d deletions(-)\n", | |
1397 | total_files, adds, dels); | |
1398 | } | |
1399 | ||
1400 | static void show_numstat(struct diffstat_t *data, struct diff_options *options) | |
1401 | { | |
1402 | int i; | |
1403 | ||
1404 | if (data->nr == 0) | |
1405 | return; | |
1406 | ||
1407 | for (i = 0; i < data->nr; i++) { | |
1408 | struct diffstat_file *file = data->files[i]; | |
1409 | ||
1410 | if (options->output_prefix) { | |
1411 | struct strbuf *msg = NULL; | |
1412 | msg = options->output_prefix(options, | |
1413 | options->output_prefix_data); | |
1414 | fprintf(options->file, "%s", msg->buf); | |
1415 | } | |
1416 | ||
1417 | if (file->is_binary) | |
1418 | fprintf(options->file, "-\t-\t"); | |
1419 | else | |
1420 | fprintf(options->file, | |
1421 | "%"PRIuMAX"\t%"PRIuMAX"\t", | |
1422 | file->added, file->deleted); | |
1423 | if (options->line_termination) { | |
1424 | fill_print_name(file); | |
1425 | if (!file->is_renamed) | |
1426 | write_name_quoted(file->name, options->file, | |
1427 | options->line_termination); | |
1428 | else { | |
1429 | fputs(file->print_name, options->file); | |
1430 | putc(options->line_termination, options->file); | |
1431 | } | |
1432 | } else { | |
1433 | if (file->is_renamed) { | |
1434 | putc('\0', options->file); | |
1435 | write_name_quoted(file->from_name, options->file, '\0'); | |
1436 | } | |
1437 | write_name_quoted(file->name, options->file, '\0'); | |
1438 | } | |
1439 | } | |
1440 | } | |
1441 | ||
1442 | struct dirstat_file { | |
1443 | const char *name; | |
1444 | unsigned long changed; | |
1445 | }; | |
1446 | ||
1447 | struct dirstat_dir { | |
1448 | struct dirstat_file *files; | |
1449 | int alloc, nr, percent, cumulative; | |
1450 | }; | |
1451 | ||
1452 | static long gather_dirstat(struct diff_options *opt, struct dirstat_dir *dir, | |
1453 | unsigned long changed, const char *base, int baselen) | |
1454 | { | |
1455 | unsigned long this_dir = 0; | |
1456 | unsigned int sources = 0; | |
1457 | const char *line_prefix = ""; | |
1458 | struct strbuf *msg = NULL; | |
1459 | ||
1460 | if (opt->output_prefix) { | |
1461 | msg = opt->output_prefix(opt, opt->output_prefix_data); | |
1462 | line_prefix = msg->buf; | |
1463 | } | |
1464 | ||
1465 | while (dir->nr) { | |
1466 | struct dirstat_file *f = dir->files; | |
1467 | int namelen = strlen(f->name); | |
1468 | unsigned long this; | |
1469 | char *slash; | |
1470 | ||
1471 | if (namelen < baselen) | |
1472 | break; | |
1473 | if (memcmp(f->name, base, baselen)) | |
1474 | break; | |
1475 | slash = strchr(f->name + baselen, '/'); | |
1476 | if (slash) { | |
1477 | int newbaselen = slash + 1 - f->name; | |
1478 | this = gather_dirstat(opt, dir, changed, f->name, newbaselen); | |
1479 | sources++; | |
1480 | } else { | |
1481 | this = f->changed; | |
1482 | dir->files++; | |
1483 | dir->nr--; | |
1484 | sources += 2; | |
1485 | } | |
1486 | this_dir += this; | |
1487 | } | |
1488 | ||
1489 | /* | |
1490 | * We don't report dirstat's for | |
1491 | * - the top level | |
1492 | * - or cases where everything came from a single directory | |
1493 | * under this directory (sources == 1). | |
1494 | */ | |
1495 | if (baselen && sources != 1) { | |
1496 | int permille = this_dir * 1000 / changed; | |
1497 | if (permille) { | |
1498 | int percent = permille / 10; | |
1499 | if (percent >= dir->percent) { | |
1500 | fprintf(opt->file, "%s%4d.%01d%% %.*s\n", line_prefix, | |
1501 | percent, permille % 10, baselen, base); | |
1502 | if (!dir->cumulative) | |
1503 | return 0; | |
1504 | } | |
1505 | } | |
1506 | } | |
1507 | return this_dir; | |
1508 | } | |
1509 | ||
1510 | static int dirstat_compare(const void *_a, const void *_b) | |
1511 | { | |
1512 | const struct dirstat_file *a = _a; | |
1513 | const struct dirstat_file *b = _b; | |
1514 | return strcmp(a->name, b->name); | |
1515 | } | |
1516 | ||
1517 | static void show_dirstat(struct diff_options *options) | |
1518 | { | |
1519 | int i; | |
1520 | unsigned long changed; | |
1521 | struct dirstat_dir dir; | |
1522 | struct diff_queue_struct *q = &diff_queued_diff; | |
1523 | ||
1524 | dir.files = NULL; | |
1525 | dir.alloc = 0; | |
1526 | dir.nr = 0; | |
1527 | dir.percent = options->dirstat_percent; | |
1528 | dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); | |
1529 | ||
1530 | changed = 0; | |
1531 | for (i = 0; i < q->nr; i++) { | |
1532 | struct diff_filepair *p = q->queue[i]; | |
1533 | const char *name; | |
1534 | unsigned long copied, added, damage; | |
1535 | ||
1536 | name = p->one->path ? p->one->path : p->two->path; | |
1537 | ||
1538 | if (DIFF_FILE_VALID(p->one) && DIFF_FILE_VALID(p->two)) { | |
1539 | diff_populate_filespec(p->one, 0); | |
1540 | diff_populate_filespec(p->two, 0); | |
1541 | diffcore_count_changes(p->one, p->two, NULL, NULL, 0, | |
1542 | &copied, &added); | |
1543 | diff_free_filespec_data(p->one); | |
1544 | diff_free_filespec_data(p->two); | |
1545 | } else if (DIFF_FILE_VALID(p->one)) { | |
1546 | diff_populate_filespec(p->one, 1); | |
1547 | copied = added = 0; | |
1548 | diff_free_filespec_data(p->one); | |
1549 | } else if (DIFF_FILE_VALID(p->two)) { | |
1550 | diff_populate_filespec(p->two, 1); | |
1551 | copied = 0; | |
1552 | added = p->two->size; | |
1553 | diff_free_filespec_data(p->two); | |
1554 | } else | |
1555 | continue; | |
1556 | ||
1557 | /* | |
1558 | * Original minus copied is the removed material, | |
1559 | * added is the new material. They are both damages | |
1560 | * made to the preimage. In --dirstat-by-file mode, count | |
1561 | * damaged files, not damaged lines. This is done by | |
1562 | * counting only a single damaged line per file. | |
1563 | */ | |
1564 | damage = (p->one->size - copied) + added; | |
1565 | if (DIFF_OPT_TST(options, DIRSTAT_BY_FILE) && damage > 0) | |
1566 | damage = 1; | |
1567 | ||
1568 | ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); | |
1569 | dir.files[dir.nr].name = name; | |
1570 | dir.files[dir.nr].changed = damage; | |
1571 | changed += damage; | |
1572 | dir.nr++; | |
1573 | } | |
1574 | ||
1575 | /* This can happen even with many files, if everything was renames */ | |
1576 | if (!changed) | |
1577 | return; | |
1578 | ||
1579 | /* Show all directories with more than x% of the changes */ | |
1580 | qsort(dir.files, dir.nr, sizeof(dir.files[0]), dirstat_compare); | |
1581 | gather_dirstat(options, &dir, changed, "", 0); | |
1582 | } | |
1583 | ||
1584 | static void free_diffstat_info(struct diffstat_t *diffstat) | |
1585 | { | |
1586 | int i; | |
1587 | for (i = 0; i < diffstat->nr; i++) { | |
1588 | struct diffstat_file *f = diffstat->files[i]; | |
1589 | if (f->name != f->print_name) | |
1590 | free(f->print_name); | |
1591 | free(f->name); | |
1592 | free(f->from_name); | |
1593 | free(f); | |
1594 | } | |
1595 | free(diffstat->files); | |
1596 | } | |
1597 | ||
1598 | struct checkdiff_t { | |
1599 | const char *filename; | |
1600 | int lineno; | |
1601 | int conflict_marker_size; | |
1602 | struct diff_options *o; | |
1603 | unsigned ws_rule; | |
1604 | unsigned status; | |
1605 | }; | |
1606 | ||
1607 | static int is_conflict_marker(const char *line, int marker_size, unsigned long len) | |
1608 | { | |
1609 | char firstchar; | |
1610 | int cnt; | |
1611 | ||
1612 | if (len < marker_size + 1) | |
1613 | return 0; | |
1614 | firstchar = line[0]; | |
1615 | switch (firstchar) { | |
1616 | case '=': case '>': case '<': case '|': | |
1617 | break; | |
1618 | default: | |
1619 | return 0; | |
1620 | } | |
1621 | for (cnt = 1; cnt < marker_size; cnt++) | |
1622 | if (line[cnt] != firstchar) | |
1623 | return 0; | |
1624 | /* line[1] thru line[marker_size-1] are same as firstchar */ | |
1625 | if (len < marker_size + 1 || !isspace(line[marker_size])) | |
1626 | return 0; | |
1627 | return 1; | |
1628 | } | |
1629 | ||
1630 | static void checkdiff_consume(void *priv, char *line, unsigned long len) | |
1631 | { | |
1632 | struct checkdiff_t *data = priv; | |
1633 | int color_diff = DIFF_OPT_TST(data->o, COLOR_DIFF); | |
1634 | int marker_size = data->conflict_marker_size; | |
1635 | const char *ws = diff_get_color(color_diff, DIFF_WHITESPACE); | |
1636 | const char *reset = diff_get_color(color_diff, DIFF_RESET); | |
1637 | const char *set = diff_get_color(color_diff, DIFF_FILE_NEW); | |
1638 | char *err; | |
1639 | char *line_prefix = ""; | |
1640 | struct strbuf *msgbuf; | |
1641 | ||
1642 | assert(data->o); | |
1643 | if (data->o->output_prefix) { | |
1644 | msgbuf = data->o->output_prefix(data->o, | |
1645 | data->o->output_prefix_data); | |
1646 | line_prefix = msgbuf->buf; | |
1647 | } | |
1648 | ||
1649 | if (line[0] == '+') { | |
1650 | unsigned bad; | |
1651 | data->lineno++; | |
1652 | if (is_conflict_marker(line + 1, marker_size, len - 1)) { | |
1653 | data->status |= 1; | |
1654 | fprintf(data->o->file, | |
1655 | "%s%s:%d: leftover conflict marker\n", | |
1656 | line_prefix, data->filename, data->lineno); | |
1657 | } | |
1658 | bad = ws_check(line + 1, len - 1, data->ws_rule); | |
1659 | if (!bad) | |
1660 | return; | |
1661 | data->status |= bad; | |
1662 | err = whitespace_error_string(bad); | |
1663 | fprintf(data->o->file, "%s%s:%d: %s.\n", | |
1664 | line_prefix, data->filename, data->lineno, err); | |
1665 | free(err); | |
1666 | emit_line(data->o, set, reset, line, 1); | |
1667 | ws_check_emit(line + 1, len - 1, data->ws_rule, | |
1668 | data->o->file, set, reset, ws); | |
1669 | } else if (line[0] == ' ') { | |
1670 | data->lineno++; | |
1671 | } else if (line[0] == '@') { | |
1672 | char *plus = strchr(line, '+'); | |
1673 | if (plus) | |
1674 | data->lineno = strtol(plus, NULL, 10) - 1; | |
1675 | else | |
1676 | die("invalid diff"); | |
1677 | } | |
1678 | } | |
1679 | ||
1680 | static unsigned char *deflate_it(char *data, | |
1681 | unsigned long size, | |
1682 | unsigned long *result_size) | |
1683 | { | |
1684 | int bound; | |
1685 | unsigned char *deflated; | |
1686 | z_stream stream; | |
1687 | ||
1688 | memset(&stream, 0, sizeof(stream)); | |
1689 | deflateInit(&stream, zlib_compression_level); | |
1690 | bound = deflateBound(&stream, size); | |
1691 | deflated = xmalloc(bound); | |
1692 | stream.next_out = deflated; | |
1693 | stream.avail_out = bound; | |
1694 | ||
1695 | stream.next_in = (unsigned char *)data; | |
1696 | stream.avail_in = size; | |
1697 | while (deflate(&stream, Z_FINISH) == Z_OK) | |
1698 | ; /* nothing */ | |
1699 | deflateEnd(&stream); | |
1700 | *result_size = stream.total_out; | |
1701 | return deflated; | |
1702 | } | |
1703 | ||
1704 | static void emit_binary_diff_body(FILE *file, mmfile_t *one, mmfile_t *two, char *prefix) | |
1705 | { | |
1706 | void *cp; | |
1707 | void *delta; | |
1708 | void *deflated; | |
1709 | void *data; | |
1710 | unsigned long orig_size; | |
1711 | unsigned long delta_size; | |
1712 | unsigned long deflate_size; | |
1713 | unsigned long data_size; | |
1714 | ||
1715 | /* We could do deflated delta, or we could do just deflated two, | |
1716 | * whichever is smaller. | |
1717 | */ | |
1718 | delta = NULL; | |
1719 | deflated = deflate_it(two->ptr, two->size, &deflate_size); | |
1720 | if (one->size && two->size) { | |
1721 | delta = diff_delta(one->ptr, one->size, | |
1722 | two->ptr, two->size, | |
1723 | &delta_size, deflate_size); | |
1724 | if (delta) { | |
1725 | void *to_free = delta; | |
1726 | orig_size = delta_size; | |
1727 | delta = deflate_it(delta, delta_size, &delta_size); | |
1728 | free(to_free); | |
1729 | } | |
1730 | } | |
1731 | ||
1732 | if (delta && delta_size < deflate_size) { | |
1733 | fprintf(file, "%sdelta %lu\n", prefix, orig_size); | |
1734 | free(deflated); | |
1735 | data = delta; | |
1736 | data_size = delta_size; | |
1737 | } | |
1738 | else { | |
1739 | fprintf(file, "%sliteral %lu\n", prefix, two->size); | |
1740 | free(delta); | |
1741 | data = deflated; | |
1742 | data_size = deflate_size; | |
1743 | } | |
1744 | ||
1745 | /* emit data encoded in base85 */ | |
1746 | cp = data; | |
1747 | while (data_size) { | |
1748 | int bytes = (52 < data_size) ? 52 : data_size; | |
1749 | char line[70]; | |
1750 | data_size -= bytes; | |
1751 | if (bytes <= 26) | |
1752 | line[0] = bytes + 'A' - 1; | |
1753 | else | |
1754 | line[0] = bytes - 26 + 'a' - 1; | |
1755 | encode_85(line + 1, cp, bytes); | |
1756 | cp = (char *) cp + bytes; | |
1757 | fprintf(file, "%s", prefix); | |
1758 | fputs(line, file); | |
1759 | fputc('\n', file); | |
1760 | } | |
1761 | fprintf(file, "%s\n", prefix); | |
1762 | free(data); | |
1763 | } | |
1764 | ||
1765 | static void emit_binary_diff(FILE *file, mmfile_t *one, mmfile_t *two, char *prefix) | |
1766 | { | |
1767 | fprintf(file, "%sGIT binary patch\n", prefix); | |
1768 | emit_binary_diff_body(file, one, two, prefix); | |
1769 | emit_binary_diff_body(file, two, one, prefix); | |
1770 | } | |
1771 | ||
1772 | static void diff_filespec_load_driver(struct diff_filespec *one) | |
1773 | { | |
1774 | /* Use already-loaded driver */ | |
1775 | if (one->driver) | |
1776 | return; | |
1777 | ||
1778 | if (S_ISREG(one->mode)) | |
1779 | one->driver = userdiff_find_by_path(one->path); | |
1780 | ||
1781 | /* Fallback to default settings */ | |
1782 | if (!one->driver) | |
1783 | one->driver = userdiff_find_by_name("default"); | |
1784 | } | |
1785 | ||
1786 | int diff_filespec_is_binary(struct diff_filespec *one) | |
1787 | { | |
1788 | if (one->is_binary == -1) { | |
1789 | diff_filespec_load_driver(one); | |
1790 | if (one->driver->binary != -1) | |
1791 | one->is_binary = one->driver->binary; | |
1792 | else { | |
1793 | if (!one->data && DIFF_FILE_VALID(one)) | |
1794 | diff_populate_filespec(one, 0); | |
1795 | if (one->data) | |
1796 | one->is_binary = buffer_is_binary(one->data, | |
1797 | one->size); | |
1798 | if (one->is_binary == -1) | |
1799 | one->is_binary = 0; | |
1800 | } | |
1801 | } | |
1802 | return one->is_binary; | |
1803 | } | |
1804 | ||
1805 | static const struct userdiff_funcname *diff_funcname_pattern(struct diff_filespec *one) | |
1806 | { | |
1807 | diff_filespec_load_driver(one); | |
1808 | return one->driver->funcname.pattern ? &one->driver->funcname : NULL; | |
1809 | } | |
1810 | ||
1811 | static const char *userdiff_word_regex(struct diff_filespec *one) | |
1812 | { | |
1813 | diff_filespec_load_driver(one); | |
1814 | return one->driver->word_regex; | |
1815 | } | |
1816 | ||
1817 | void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b) | |
1818 | { | |
1819 | if (!options->a_prefix) | |
1820 | options->a_prefix = a; | |
1821 | if (!options->b_prefix) | |
1822 | options->b_prefix = b; | |
1823 | } | |
1824 | ||
1825 | struct userdiff_driver *get_textconv(struct diff_filespec *one) | |
1826 | { | |
1827 | if (!DIFF_FILE_VALID(one)) | |
1828 | return NULL; | |
1829 | ||
1830 | diff_filespec_load_driver(one); | |
1831 | if (!one->driver->textconv) | |
1832 | return NULL; | |
1833 | ||
1834 | if (one->driver->textconv_want_cache && !one->driver->textconv_cache) { | |
1835 | struct notes_cache *c = xmalloc(sizeof(*c)); | |
1836 | struct strbuf name = STRBUF_INIT; | |
1837 | ||
1838 | strbuf_addf(&name, "textconv/%s", one->driver->name); | |
1839 | notes_cache_init(c, name.buf, one->driver->textconv); | |
1840 | one->driver->textconv_cache = c; | |
1841 | } | |
1842 | ||
1843 | return one->driver; | |
1844 | } | |
1845 | ||
1846 | static void builtin_diff(const char *name_a, | |
1847 | const char *name_b, | |
1848 | struct diff_filespec *one, | |
1849 | struct diff_filespec *two, | |
1850 | const char *xfrm_msg, | |
1851 | int must_show_header, | |
1852 | struct diff_options *o, | |
1853 | int complete_rewrite) | |
1854 | { | |
1855 | mmfile_t mf1, mf2; | |
1856 | const char *lbl[2]; | |
1857 | char *a_one, *b_two; | |
1858 | const char *set = diff_get_color_opt(o, DIFF_METAINFO); | |
1859 | const char *reset = diff_get_color_opt(o, DIFF_RESET); | |
1860 | const char *a_prefix, *b_prefix; | |
1861 | struct userdiff_driver *textconv_one = NULL; | |
1862 | struct userdiff_driver *textconv_two = NULL; | |
1863 | struct strbuf header = STRBUF_INIT; | |
1864 | struct strbuf *msgbuf; | |
1865 | char *line_prefix = ""; | |
1866 | ||
1867 | if (o->output_prefix) { | |
1868 | msgbuf = o->output_prefix(o, o->output_prefix_data); | |
1869 | line_prefix = msgbuf->buf; | |
1870 | } | |
1871 | ||
1872 | if (DIFF_OPT_TST(o, SUBMODULE_LOG) && | |
1873 | (!one->mode || S_ISGITLINK(one->mode)) && | |
1874 | (!two->mode || S_ISGITLINK(two->mode))) { | |
1875 | const char *del = diff_get_color_opt(o, DIFF_FILE_OLD); | |
1876 | const char *add = diff_get_color_opt(o, DIFF_FILE_NEW); | |
1877 | show_submodule_summary(o->file, one ? one->path : two->path, | |
1878 | one->sha1, two->sha1, two->dirty_submodule, | |
1879 | del, add, reset); | |
1880 | return; | |
1881 | } | |
1882 | ||
1883 | if (DIFF_OPT_TST(o, ALLOW_TEXTCONV)) { | |
1884 | textconv_one = get_textconv(one); | |
1885 | textconv_two = get_textconv(two); | |
1886 | } | |
1887 | ||
1888 | diff_set_mnemonic_prefix(o, "a/", "b/"); | |
1889 | if (DIFF_OPT_TST(o, REVERSE_DIFF)) { | |
1890 | a_prefix = o->b_prefix; | |
1891 | b_prefix = o->a_prefix; | |
1892 | } else { | |
1893 | a_prefix = o->a_prefix; | |
1894 | b_prefix = o->b_prefix; | |
1895 | } | |
1896 | ||
1897 | /* Never use a non-valid filename anywhere if at all possible */ | |
1898 | name_a = DIFF_FILE_VALID(one) ? name_a : name_b; | |
1899 | name_b = DIFF_FILE_VALID(two) ? name_b : name_a; | |
1900 | ||
1901 | a_one = quote_two(a_prefix, name_a + (*name_a == '/')); | |
1902 | b_two = quote_two(b_prefix, name_b + (*name_b == '/')); | |
1903 | lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null"; | |
1904 | lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null"; | |
1905 | strbuf_addf(&header, "%s%sdiff --git %s %s%s\n", line_prefix, set, a_one, b_two, reset); | |
1906 | if (lbl[0][0] == '/') { | |
1907 | /* /dev/null */ | |
1908 | strbuf_addf(&header, "%s%snew file mode %06o%s\n", line_prefix, set, two->mode, reset); | |
1909 | if (xfrm_msg) | |
1910 | strbuf_addstr(&header, xfrm_msg); | |
1911 | must_show_header = 1; | |
1912 | } | |
1913 | else if (lbl[1][0] == '/') { | |
1914 | strbuf_addf(&header, "%s%sdeleted file mode %06o%s\n", line_prefix, set, one->mode, reset); | |
1915 | if (xfrm_msg) | |
1916 | strbuf_addstr(&header, xfrm_msg); | |
1917 | must_show_header = 1; | |
1918 | } | |
1919 | else { | |
1920 | if (one->mode != two->mode) { | |
1921 | strbuf_addf(&header, "%s%sold mode %06o%s\n", line_prefix, set, one->mode, reset); | |
1922 | strbuf_addf(&header, "%s%snew mode %06o%s\n", line_prefix, set, two->mode, reset); | |
1923 | must_show_header = 1; | |
1924 | } | |
1925 | if (xfrm_msg) | |
1926 | strbuf_addstr(&header, xfrm_msg); | |
1927 | ||
1928 | /* | |
1929 | * we do not run diff between different kind | |
1930 | * of objects. | |
1931 | */ | |
1932 | if ((one->mode ^ two->mode) & S_IFMT) | |
1933 | goto free_ab_and_return; | |
1934 | if (complete_rewrite && | |
1935 | (textconv_one || !diff_filespec_is_binary(one)) && | |
1936 | (textconv_two || !diff_filespec_is_binary(two))) { | |
1937 | fprintf(o->file, "%s", header.buf); | |
1938 | strbuf_reset(&header); | |
1939 | emit_rewrite_diff(name_a, name_b, one, two, | |
1940 | textconv_one, textconv_two, o); | |
1941 | o->found_changes = 1; | |
1942 | goto free_ab_and_return; | |
1943 | } | |
1944 | } | |
1945 | ||
1946 | if (!DIFF_OPT_TST(o, TEXT) && | |
1947 | ( (!textconv_one && diff_filespec_is_binary(one)) || | |
1948 | (!textconv_two && diff_filespec_is_binary(two)) )) { | |
1949 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
1950 | die("unable to read files to diff"); | |
1951 | /* Quite common confusing case */ | |
1952 | if (mf1.size == mf2.size && | |
1953 | !memcmp(mf1.ptr, mf2.ptr, mf1.size)) { | |
1954 | if (must_show_header) | |
1955 | fprintf(o->file, "%s", header.buf); | |
1956 | goto free_ab_and_return; | |
1957 | } | |
1958 | fprintf(o->file, "%s", header.buf); | |
1959 | strbuf_reset(&header); | |
1960 | if (DIFF_OPT_TST(o, BINARY)) | |
1961 | emit_binary_diff(o->file, &mf1, &mf2, line_prefix); | |
1962 | else | |
1963 | fprintf(o->file, "%sBinary files %s and %s differ\n", | |
1964 | line_prefix, lbl[0], lbl[1]); | |
1965 | o->found_changes = 1; | |
1966 | } | |
1967 | else { | |
1968 | /* Crazy xdl interfaces.. */ | |
1969 | const char *diffopts = getenv("GIT_DIFF_OPTS"); | |
1970 | xpparam_t xpp; | |
1971 | xdemitconf_t xecfg; | |
1972 | struct emit_callback ecbdata; | |
1973 | const struct userdiff_funcname *pe; | |
1974 | ||
1975 | if (!DIFF_XDL_TST(o, WHITESPACE_FLAGS) || must_show_header) { | |
1976 | fprintf(o->file, "%s", header.buf); | |
1977 | strbuf_reset(&header); | |
1978 | } | |
1979 | ||
1980 | mf1.size = fill_textconv(textconv_one, one, &mf1.ptr); | |
1981 | mf2.size = fill_textconv(textconv_two, two, &mf2.ptr); | |
1982 | ||
1983 | pe = diff_funcname_pattern(one); | |
1984 | if (!pe) | |
1985 | pe = diff_funcname_pattern(two); | |
1986 | ||
1987 | memset(&xpp, 0, sizeof(xpp)); | |
1988 | memset(&xecfg, 0, sizeof(xecfg)); | |
1989 | memset(&ecbdata, 0, sizeof(ecbdata)); | |
1990 | ecbdata.label_path = lbl; | |
1991 | ecbdata.color_diff = DIFF_OPT_TST(o, COLOR_DIFF); | |
1992 | ecbdata.found_changesp = &o->found_changes; | |
1993 | ecbdata.ws_rule = whitespace_rule(name_b ? name_b : name_a); | |
1994 | if (ecbdata.ws_rule & WS_BLANK_AT_EOF) | |
1995 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
1996 | ecbdata.opt = o; | |
1997 | ecbdata.header = header.len ? &header : NULL; | |
1998 | xpp.flags = o->xdl_opts; | |
1999 | xecfg.ctxlen = o->context; | |
2000 | xecfg.interhunkctxlen = o->interhunkcontext; | |
2001 | xecfg.flags = XDL_EMIT_FUNCNAMES; | |
2002 | if (pe) | |
2003 | xdiff_set_find_func(&xecfg, pe->pattern, pe->cflags); | |
2004 | if (!diffopts) | |
2005 | ; | |
2006 | else if (!prefixcmp(diffopts, "--unified=")) | |
2007 | xecfg.ctxlen = strtoul(diffopts + 10, NULL, 10); | |
2008 | else if (!prefixcmp(diffopts, "-u")) | |
2009 | xecfg.ctxlen = strtoul(diffopts + 2, NULL, 10); | |
2010 | if (o->word_diff) { | |
2011 | int i; | |
2012 | ||
2013 | ecbdata.diff_words = | |
2014 | xcalloc(1, sizeof(struct diff_words_data)); | |
2015 | ecbdata.diff_words->type = o->word_diff; | |
2016 | ecbdata.diff_words->opt = o; | |
2017 | if (!o->word_regex) | |
2018 | o->word_regex = userdiff_word_regex(one); | |
2019 | if (!o->word_regex) | |
2020 | o->word_regex = userdiff_word_regex(two); | |
2021 | if (!o->word_regex) | |
2022 | o->word_regex = diff_word_regex_cfg; | |
2023 | if (o->word_regex) { | |
2024 | ecbdata.diff_words->word_regex = (regex_t *) | |
2025 | xmalloc(sizeof(regex_t)); | |
2026 | if (regcomp(ecbdata.diff_words->word_regex, | |
2027 | o->word_regex, | |
2028 | REG_EXTENDED | REG_NEWLINE)) | |
2029 | die ("Invalid regular expression: %s", | |
2030 | o->word_regex); | |
2031 | } | |
2032 | for (i = 0; i < ARRAY_SIZE(diff_words_styles); i++) { | |
2033 | if (o->word_diff == diff_words_styles[i].type) { | |
2034 | ecbdata.diff_words->style = | |
2035 | &diff_words_styles[i]; | |
2036 | break; | |
2037 | } | |
2038 | } | |
2039 | if (DIFF_OPT_TST(o, COLOR_DIFF)) { | |
2040 | struct diff_words_style *st = ecbdata.diff_words->style; | |
2041 | st->old.color = diff_get_color_opt(o, DIFF_FILE_OLD); | |
2042 | st->new.color = diff_get_color_opt(o, DIFF_FILE_NEW); | |
2043 | st->ctx.color = diff_get_color_opt(o, DIFF_PLAIN); | |
2044 | } | |
2045 | } | |
2046 | xdi_diff_outf(&mf1, &mf2, fn_out_consume, &ecbdata, | |
2047 | &xpp, &xecfg); | |
2048 | if (o->word_diff) | |
2049 | free_diff_words_data(&ecbdata); | |
2050 | if (textconv_one) | |
2051 | free(mf1.ptr); | |
2052 | if (textconv_two) | |
2053 | free(mf2.ptr); | |
2054 | xdiff_clear_find_func(&xecfg); | |
2055 | } | |
2056 | ||
2057 | free_ab_and_return: | |
2058 | strbuf_release(&header); | |
2059 | diff_free_filespec_data(one); | |
2060 | diff_free_filespec_data(two); | |
2061 | free(a_one); | |
2062 | free(b_two); | |
2063 | return; | |
2064 | } | |
2065 | ||
2066 | static void builtin_diffstat(const char *name_a, const char *name_b, | |
2067 | struct diff_filespec *one, | |
2068 | struct diff_filespec *two, | |
2069 | struct diffstat_t *diffstat, | |
2070 | struct diff_options *o, | |
2071 | int complete_rewrite) | |
2072 | { | |
2073 | mmfile_t mf1, mf2; | |
2074 | struct diffstat_file *data; | |
2075 | ||
2076 | data = diffstat_add(diffstat, name_a, name_b); | |
2077 | ||
2078 | if (!one || !two) { | |
2079 | data->is_unmerged = 1; | |
2080 | return; | |
2081 | } | |
2082 | if (complete_rewrite) { | |
2083 | diff_populate_filespec(one, 0); | |
2084 | diff_populate_filespec(two, 0); | |
2085 | data->deleted = count_lines(one->data, one->size); | |
2086 | data->added = count_lines(two->data, two->size); | |
2087 | goto free_and_return; | |
2088 | } | |
2089 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
2090 | die("unable to read files to diff"); | |
2091 | ||
2092 | if (diff_filespec_is_binary(one) || diff_filespec_is_binary(two)) { | |
2093 | data->is_binary = 1; | |
2094 | data->added = mf2.size; | |
2095 | data->deleted = mf1.size; | |
2096 | } else { | |
2097 | /* Crazy xdl interfaces.. */ | |
2098 | xpparam_t xpp; | |
2099 | xdemitconf_t xecfg; | |
2100 | ||
2101 | memset(&xpp, 0, sizeof(xpp)); | |
2102 | memset(&xecfg, 0, sizeof(xecfg)); | |
2103 | xpp.flags = o->xdl_opts; | |
2104 | xdi_diff_outf(&mf1, &mf2, diffstat_consume, diffstat, | |
2105 | &xpp, &xecfg); | |
2106 | } | |
2107 | ||
2108 | free_and_return: | |
2109 | diff_free_filespec_data(one); | |
2110 | diff_free_filespec_data(two); | |
2111 | } | |
2112 | ||
2113 | static void builtin_checkdiff(const char *name_a, const char *name_b, | |
2114 | const char *attr_path, | |
2115 | struct diff_filespec *one, | |
2116 | struct diff_filespec *two, | |
2117 | struct diff_options *o) | |
2118 | { | |
2119 | mmfile_t mf1, mf2; | |
2120 | struct checkdiff_t data; | |
2121 | ||
2122 | if (!two) | |
2123 | return; | |
2124 | ||
2125 | memset(&data, 0, sizeof(data)); | |
2126 | data.filename = name_b ? name_b : name_a; | |
2127 | data.lineno = 0; | |
2128 | data.o = o; | |
2129 | data.ws_rule = whitespace_rule(attr_path); | |
2130 | data.conflict_marker_size = ll_merge_marker_size(attr_path); | |
2131 | ||
2132 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
2133 | die("unable to read files to diff"); | |
2134 | ||
2135 | /* | |
2136 | * All the other codepaths check both sides, but not checking | |
2137 | * the "old" side here is deliberate. We are checking the newly | |
2138 | * introduced changes, and as long as the "new" side is text, we | |
2139 | * can and should check what it introduces. | |
2140 | */ | |
2141 | if (diff_filespec_is_binary(two)) | |
2142 | goto free_and_return; | |
2143 | else { | |
2144 | /* Crazy xdl interfaces.. */ | |
2145 | xpparam_t xpp; | |
2146 | xdemitconf_t xecfg; | |
2147 | ||
2148 | memset(&xpp, 0, sizeof(xpp)); | |
2149 | memset(&xecfg, 0, sizeof(xecfg)); | |
2150 | xecfg.ctxlen = 1; /* at least one context line */ | |
2151 | xpp.flags = 0; | |
2152 | xdi_diff_outf(&mf1, &mf2, checkdiff_consume, &data, | |
2153 | &xpp, &xecfg); | |
2154 | ||
2155 | if (data.ws_rule & WS_BLANK_AT_EOF) { | |
2156 | struct emit_callback ecbdata; | |
2157 | int blank_at_eof; | |
2158 | ||
2159 | ecbdata.ws_rule = data.ws_rule; | |
2160 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
2161 | blank_at_eof = ecbdata.blank_at_eof_in_postimage; | |
2162 | ||
2163 | if (blank_at_eof) { | |
2164 | static char *err; | |
2165 | if (!err) | |
2166 | err = whitespace_error_string(WS_BLANK_AT_EOF); | |
2167 | fprintf(o->file, "%s:%d: %s.\n", | |
2168 | data.filename, blank_at_eof, err); | |
2169 | data.status = 1; /* report errors */ | |
2170 | } | |
2171 | } | |
2172 | } | |
2173 | free_and_return: | |
2174 | diff_free_filespec_data(one); | |
2175 | diff_free_filespec_data(two); | |
2176 | if (data.status) | |
2177 | DIFF_OPT_SET(o, CHECK_FAILED); | |
2178 | } | |
2179 | ||
2180 | struct diff_filespec *alloc_filespec(const char *path) | |
2181 | { | |
2182 | int namelen = strlen(path); | |
2183 | struct diff_filespec *spec = xmalloc(sizeof(*spec) + namelen + 1); | |
2184 | ||
2185 | memset(spec, 0, sizeof(*spec)); | |
2186 | spec->path = (char *)(spec + 1); | |
2187 | memcpy(spec->path, path, namelen+1); | |
2188 | spec->count = 1; | |
2189 | spec->is_binary = -1; | |
2190 | return spec; | |
2191 | } | |
2192 | ||
2193 | void free_filespec(struct diff_filespec *spec) | |
2194 | { | |
2195 | if (!--spec->count) { | |
2196 | diff_free_filespec_data(spec); | |
2197 | free(spec); | |
2198 | } | |
2199 | } | |
2200 | ||
2201 | void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1, | |
2202 | unsigned short mode) | |
2203 | { | |
2204 | if (mode) { | |
2205 | spec->mode = canon_mode(mode); | |
2206 | hashcpy(spec->sha1, sha1); | |
2207 | spec->sha1_valid = !is_null_sha1(sha1); | |
2208 | } | |
2209 | } | |
2210 | ||
2211 | /* | |
2212 | * Given a name and sha1 pair, if the index tells us the file in | |
2213 | * the work tree has that object contents, return true, so that | |
2214 | * prepare_temp_file() does not have to inflate and extract. | |
2215 | */ | |
2216 | static int reuse_worktree_file(const char *name, const unsigned char *sha1, int want_file) | |
2217 | { | |
2218 | struct cache_entry *ce; | |
2219 | struct stat st; | |
2220 | int pos, len; | |
2221 | ||
2222 | /* | |
2223 | * We do not read the cache ourselves here, because the | |
2224 | * benchmark with my previous version that always reads cache | |
2225 | * shows that it makes things worse for diff-tree comparing | |
2226 | * two linux-2.6 kernel trees in an already checked out work | |
2227 | * tree. This is because most diff-tree comparisons deal with | |
2228 | * only a small number of files, while reading the cache is | |
2229 | * expensive for a large project, and its cost outweighs the | |
2230 | * savings we get by not inflating the object to a temporary | |
2231 | * file. Practically, this code only helps when we are used | |
2232 | * by diff-cache --cached, which does read the cache before | |
2233 | * calling us. | |
2234 | */ | |
2235 | if (!active_cache) | |
2236 | return 0; | |
2237 | ||
2238 | /* We want to avoid the working directory if our caller | |
2239 | * doesn't need the data in a normal file, this system | |
2240 | * is rather slow with its stat/open/mmap/close syscalls, | |
2241 | * and the object is contained in a pack file. The pack | |
2242 | * is probably already open and will be faster to obtain | |
2243 | * the data through than the working directory. Loose | |
2244 | * objects however would tend to be slower as they need | |
2245 | * to be individually opened and inflated. | |
2246 | */ | |
2247 | if (!FAST_WORKING_DIRECTORY && !want_file && has_sha1_pack(sha1)) | |
2248 | return 0; | |
2249 | ||
2250 | len = strlen(name); | |
2251 | pos = cache_name_pos(name, len); | |
2252 | if (pos < 0) | |
2253 | return 0; | |
2254 | ce = active_cache[pos]; | |
2255 | ||
2256 | /* | |
2257 | * This is not the sha1 we are looking for, or | |
2258 | * unreusable because it is not a regular file. | |
2259 | */ | |
2260 | if (hashcmp(sha1, ce->sha1) || !S_ISREG(ce->ce_mode)) | |
2261 | return 0; | |
2262 | ||
2263 | /* | |
2264 | * If ce is marked as "assume unchanged", there is no | |
2265 | * guarantee that work tree matches what we are looking for. | |
2266 | */ | |
2267 | if ((ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) | |
2268 | return 0; | |
2269 | ||
2270 | /* | |
2271 | * If ce matches the file in the work tree, we can reuse it. | |
2272 | */ | |
2273 | if (ce_uptodate(ce) || | |
2274 | (!lstat(name, &st) && !ce_match_stat(ce, &st, 0))) | |
2275 | return 1; | |
2276 | ||
2277 | return 0; | |
2278 | } | |
2279 | ||
2280 | static int populate_from_stdin(struct diff_filespec *s) | |
2281 | { | |
2282 | struct strbuf buf = STRBUF_INIT; | |
2283 | size_t size = 0; | |
2284 | ||
2285 | if (strbuf_read(&buf, 0, 0) < 0) | |
2286 | return error("error while reading from stdin %s", | |
2287 | strerror(errno)); | |
2288 | ||
2289 | s->should_munmap = 0; | |
2290 | s->data = strbuf_detach(&buf, &size); | |
2291 | s->size = size; | |
2292 | s->should_free = 1; | |
2293 | return 0; | |
2294 | } | |
2295 | ||
2296 | static int diff_populate_gitlink(struct diff_filespec *s, int size_only) | |
2297 | { | |
2298 | int len; | |
2299 | char *data = xmalloc(100), *dirty = ""; | |
2300 | ||
2301 | /* Are we looking at the work tree? */ | |
2302 | if (s->dirty_submodule) | |
2303 | dirty = "-dirty"; | |
2304 | ||
2305 | len = snprintf(data, 100, | |
2306 | "Subproject commit %s%s\n", sha1_to_hex(s->sha1), dirty); | |
2307 | s->data = data; | |
2308 | s->size = len; | |
2309 | s->should_free = 1; | |
2310 | if (size_only) { | |
2311 | s->data = NULL; | |
2312 | free(data); | |
2313 | } | |
2314 | return 0; | |
2315 | } | |
2316 | ||
2317 | /* | |
2318 | * While doing rename detection and pickaxe operation, we may need to | |
2319 | * grab the data for the blob (or file) for our own in-core comparison. | |
2320 | * diff_filespec has data and size fields for this purpose. | |
2321 | */ | |
2322 | int diff_populate_filespec(struct diff_filespec *s, int size_only) | |
2323 | { | |
2324 | int err = 0; | |
2325 | if (!DIFF_FILE_VALID(s)) | |
2326 | die("internal error: asking to populate invalid file."); | |
2327 | if (S_ISDIR(s->mode)) | |
2328 | return -1; | |
2329 | ||
2330 | if (s->data) | |
2331 | return 0; | |
2332 | ||
2333 | if (size_only && 0 < s->size) | |
2334 | return 0; | |
2335 | ||
2336 | if (S_ISGITLINK(s->mode)) | |
2337 | return diff_populate_gitlink(s, size_only); | |
2338 | ||
2339 | if (!s->sha1_valid || | |
2340 | reuse_worktree_file(s->path, s->sha1, 0)) { | |
2341 | struct strbuf buf = STRBUF_INIT; | |
2342 | struct stat st; | |
2343 | int fd; | |
2344 | ||
2345 | if (!strcmp(s->path, "-")) | |
2346 | return populate_from_stdin(s); | |
2347 | ||
2348 | if (lstat(s->path, &st) < 0) { | |
2349 | if (errno == ENOENT) { | |
2350 | err_empty: | |
2351 | err = -1; | |
2352 | empty: | |
2353 | s->data = (char *)""; | |
2354 | s->size = 0; | |
2355 | return err; | |
2356 | } | |
2357 | } | |
2358 | s->size = xsize_t(st.st_size); | |
2359 | if (!s->size) | |
2360 | goto empty; | |
2361 | if (S_ISLNK(st.st_mode)) { | |
2362 | struct strbuf sb = STRBUF_INIT; | |
2363 | ||
2364 | if (strbuf_readlink(&sb, s->path, s->size)) | |
2365 | goto err_empty; | |
2366 | s->size = sb.len; | |
2367 | s->data = strbuf_detach(&sb, NULL); | |
2368 | s->should_free = 1; | |
2369 | return 0; | |
2370 | } | |
2371 | if (size_only) | |
2372 | return 0; | |
2373 | fd = open(s->path, O_RDONLY); | |
2374 | if (fd < 0) | |
2375 | goto err_empty; | |
2376 | s->data = xmmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0); | |
2377 | close(fd); | |
2378 | s->should_munmap = 1; | |
2379 | ||
2380 | /* | |
2381 | * Convert from working tree format to canonical git format | |
2382 | */ | |
2383 | if (convert_to_git(s->path, s->data, s->size, &buf, safe_crlf)) { | |
2384 | size_t size = 0; | |
2385 | munmap(s->data, s->size); | |
2386 | s->should_munmap = 0; | |
2387 | s->data = strbuf_detach(&buf, &size); | |
2388 | s->size = size; | |
2389 | s->should_free = 1; | |
2390 | } | |
2391 | } | |
2392 | else { | |
2393 | enum object_type type; | |
2394 | if (size_only) { | |
2395 | type = sha1_object_info(s->sha1, &s->size); | |
2396 | if (type < 0) | |
2397 | die("unable to read %s", sha1_to_hex(s->sha1)); | |
2398 | } else { | |
2399 | s->data = read_sha1_file(s->sha1, &type, &s->size); | |
2400 | if (!s->data) | |
2401 | die("unable to read %s", sha1_to_hex(s->sha1)); | |
2402 | s->should_free = 1; | |
2403 | } | |
2404 | } | |
2405 | return 0; | |
2406 | } | |
2407 | ||
2408 | void diff_free_filespec_blob(struct diff_filespec *s) | |
2409 | { | |
2410 | if (s->should_free) | |
2411 | free(s->data); | |
2412 | else if (s->should_munmap) | |
2413 | munmap(s->data, s->size); | |
2414 | ||
2415 | if (s->should_free || s->should_munmap) { | |
2416 | s->should_free = s->should_munmap = 0; | |
2417 | s->data = NULL; | |
2418 | } | |
2419 | } | |
2420 | ||
2421 | void diff_free_filespec_data(struct diff_filespec *s) | |
2422 | { | |
2423 | diff_free_filespec_blob(s); | |
2424 | free(s->cnt_data); | |
2425 | s->cnt_data = NULL; | |
2426 | } | |
2427 | ||
2428 | static void prep_temp_blob(const char *path, struct diff_tempfile *temp, | |
2429 | void *blob, | |
2430 | unsigned long size, | |
2431 | const unsigned char *sha1, | |
2432 | int mode) | |
2433 | { | |
2434 | int fd; | |
2435 | struct strbuf buf = STRBUF_INIT; | |
2436 | struct strbuf template = STRBUF_INIT; | |
2437 | char *path_dup = xstrdup(path); | |
2438 | const char *base = basename(path_dup); | |
2439 | ||
2440 | /* Generate "XXXXXX_basename.ext" */ | |
2441 | strbuf_addstr(&template, "XXXXXX_"); | |
2442 | strbuf_addstr(&template, base); | |
2443 | ||
2444 | fd = git_mkstemps(temp->tmp_path, PATH_MAX, template.buf, | |
2445 | strlen(base) + 1); | |
2446 | if (fd < 0) | |
2447 | die_errno("unable to create temp-file"); | |
2448 | if (convert_to_working_tree(path, | |
2449 | (const char *)blob, (size_t)size, &buf)) { | |
2450 | blob = buf.buf; | |
2451 | size = buf.len; | |
2452 | } | |
2453 | if (write_in_full(fd, blob, size) != size) | |
2454 | die_errno("unable to write temp-file"); | |
2455 | close(fd); | |
2456 | temp->name = temp->tmp_path; | |
2457 | strcpy(temp->hex, sha1_to_hex(sha1)); | |
2458 | temp->hex[40] = 0; | |
2459 | sprintf(temp->mode, "%06o", mode); | |
2460 | strbuf_release(&buf); | |
2461 | strbuf_release(&template); | |
2462 | free(path_dup); | |
2463 | } | |
2464 | ||
2465 | static struct diff_tempfile *prepare_temp_file(const char *name, | |
2466 | struct diff_filespec *one) | |
2467 | { | |
2468 | struct diff_tempfile *temp = claim_diff_tempfile(); | |
2469 | ||
2470 | if (!DIFF_FILE_VALID(one)) { | |
2471 | not_a_valid_file: | |
2472 | /* A '-' entry produces this for file-2, and | |
2473 | * a '+' entry produces this for file-1. | |
2474 | */ | |
2475 | temp->name = "/dev/null"; | |
2476 | strcpy(temp->hex, "."); | |
2477 | strcpy(temp->mode, "."); | |
2478 | return temp; | |
2479 | } | |
2480 | ||
2481 | if (!remove_tempfile_installed) { | |
2482 | atexit(remove_tempfile); | |
2483 | sigchain_push_common(remove_tempfile_on_signal); | |
2484 | remove_tempfile_installed = 1; | |
2485 | } | |
2486 | ||
2487 | if (!one->sha1_valid || | |
2488 | reuse_worktree_file(name, one->sha1, 1)) { | |
2489 | struct stat st; | |
2490 | if (lstat(name, &st) < 0) { | |
2491 | if (errno == ENOENT) | |
2492 | goto not_a_valid_file; | |
2493 | die_errno("stat(%s)", name); | |
2494 | } | |
2495 | if (S_ISLNK(st.st_mode)) { | |
2496 | struct strbuf sb = STRBUF_INIT; | |
2497 | if (strbuf_readlink(&sb, name, st.st_size) < 0) | |
2498 | die_errno("readlink(%s)", name); | |
2499 | prep_temp_blob(name, temp, sb.buf, sb.len, | |
2500 | (one->sha1_valid ? | |
2501 | one->sha1 : null_sha1), | |
2502 | (one->sha1_valid ? | |
2503 | one->mode : S_IFLNK)); | |
2504 | strbuf_release(&sb); | |
2505 | } | |
2506 | else { | |
2507 | /* we can borrow from the file in the work tree */ | |
2508 | temp->name = name; | |
2509 | if (!one->sha1_valid) | |
2510 | strcpy(temp->hex, sha1_to_hex(null_sha1)); | |
2511 | else | |
2512 | strcpy(temp->hex, sha1_to_hex(one->sha1)); | |
2513 | /* Even though we may sometimes borrow the | |
2514 | * contents from the work tree, we always want | |
2515 | * one->mode. mode is trustworthy even when | |
2516 | * !(one->sha1_valid), as long as | |
2517 | * DIFF_FILE_VALID(one). | |
2518 | */ | |
2519 | sprintf(temp->mode, "%06o", one->mode); | |
2520 | } | |
2521 | return temp; | |
2522 | } | |
2523 | else { | |
2524 | if (diff_populate_filespec(one, 0)) | |
2525 | die("cannot read data blob for %s", one->path); | |
2526 | prep_temp_blob(name, temp, one->data, one->size, | |
2527 | one->sha1, one->mode); | |
2528 | } | |
2529 | return temp; | |
2530 | } | |
2531 | ||
2532 | /* An external diff command takes: | |
2533 | * | |
2534 | * diff-cmd name infile1 infile1-sha1 infile1-mode \ | |
2535 | * infile2 infile2-sha1 infile2-mode [ rename-to ] | |
2536 | * | |
2537 | */ | |
2538 | static void run_external_diff(const char *pgm, | |
2539 | const char *name, | |
2540 | const char *other, | |
2541 | struct diff_filespec *one, | |
2542 | struct diff_filespec *two, | |
2543 | const char *xfrm_msg, | |
2544 | int complete_rewrite) | |
2545 | { | |
2546 | const char *spawn_arg[10]; | |
2547 | int retval; | |
2548 | const char **arg = &spawn_arg[0]; | |
2549 | ||
2550 | if (one && two) { | |
2551 | struct diff_tempfile *temp_one, *temp_two; | |
2552 | const char *othername = (other ? other : name); | |
2553 | temp_one = prepare_temp_file(name, one); | |
2554 | temp_two = prepare_temp_file(othername, two); | |
2555 | *arg++ = pgm; | |
2556 | *arg++ = name; | |
2557 | *arg++ = temp_one->name; | |
2558 | *arg++ = temp_one->hex; | |
2559 | *arg++ = temp_one->mode; | |
2560 | *arg++ = temp_two->name; | |
2561 | *arg++ = temp_two->hex; | |
2562 | *arg++ = temp_two->mode; | |
2563 | if (other) { | |
2564 | *arg++ = other; | |
2565 | *arg++ = xfrm_msg; | |
2566 | } | |
2567 | } else { | |
2568 | *arg++ = pgm; | |
2569 | *arg++ = name; | |
2570 | } | |
2571 | *arg = NULL; | |
2572 | fflush(NULL); | |
2573 | retval = run_command_v_opt(spawn_arg, RUN_USING_SHELL); | |
2574 | remove_tempfile(); | |
2575 | if (retval) { | |
2576 | fprintf(stderr, "external diff died, stopping at %s.\n", name); | |
2577 | exit(1); | |
2578 | } | |
2579 | } | |
2580 | ||
2581 | static int similarity_index(struct diff_filepair *p) | |
2582 | { | |
2583 | return p->score * 100 / MAX_SCORE; | |
2584 | } | |
2585 | ||
2586 | static void fill_metainfo(struct strbuf *msg, | |
2587 | const char *name, | |
2588 | const char *other, | |
2589 | struct diff_filespec *one, | |
2590 | struct diff_filespec *two, | |
2591 | struct diff_options *o, | |
2592 | struct diff_filepair *p, | |
2593 | int *must_show_header, | |
2594 | int use_color) | |
2595 | { | |
2596 | const char *set = diff_get_color(use_color, DIFF_METAINFO); | |
2597 | const char *reset = diff_get_color(use_color, DIFF_RESET); | |
2598 | struct strbuf *msgbuf; | |
2599 | char *line_prefix = ""; | |
2600 | ||
2601 | *must_show_header = 1; | |
2602 | if (o->output_prefix) { | |
2603 | msgbuf = o->output_prefix(o, o->output_prefix_data); | |
2604 | line_prefix = msgbuf->buf; | |
2605 | } | |
2606 | strbuf_init(msg, PATH_MAX * 2 + 300); | |
2607 | switch (p->status) { | |
2608 | case DIFF_STATUS_COPIED: | |
2609 | strbuf_addf(msg, "%s%ssimilarity index %d%%", | |
2610 | line_prefix, set, similarity_index(p)); | |
2611 | strbuf_addf(msg, "%s\n%s%scopy from ", | |
2612 | reset, line_prefix, set); | |
2613 | quote_c_style(name, msg, NULL, 0); | |
2614 | strbuf_addf(msg, "%s\n%s%scopy to ", reset, line_prefix, set); | |
2615 | quote_c_style(other, msg, NULL, 0); | |
2616 | strbuf_addf(msg, "%s\n", reset); | |
2617 | break; | |
2618 | case DIFF_STATUS_RENAMED: | |
2619 | strbuf_addf(msg, "%s%ssimilarity index %d%%", | |
2620 | line_prefix, set, similarity_index(p)); | |
2621 | strbuf_addf(msg, "%s\n%s%srename from ", | |
2622 | reset, line_prefix, set); | |
2623 | quote_c_style(name, msg, NULL, 0); | |
2624 | strbuf_addf(msg, "%s\n%s%srename to ", | |
2625 | reset, line_prefix, set); | |
2626 | quote_c_style(other, msg, NULL, 0); | |
2627 | strbuf_addf(msg, "%s\n", reset); | |
2628 | break; | |
2629 | case DIFF_STATUS_MODIFIED: | |
2630 | if (p->score) { | |
2631 | strbuf_addf(msg, "%s%sdissimilarity index %d%%%s\n", | |
2632 | line_prefix, | |
2633 | set, similarity_index(p), reset); | |
2634 | break; | |
2635 | } | |
2636 | /* fallthru */ | |
2637 | default: | |
2638 | *must_show_header = 0; | |
2639 | } | |
2640 | if (one && two && hashcmp(one->sha1, two->sha1)) { | |
2641 | int abbrev = DIFF_OPT_TST(o, FULL_INDEX) ? 40 : DEFAULT_ABBREV; | |
2642 | ||
2643 | if (DIFF_OPT_TST(o, BINARY)) { | |
2644 | mmfile_t mf; | |
2645 | if ((!fill_mmfile(&mf, one) && diff_filespec_is_binary(one)) || | |
2646 | (!fill_mmfile(&mf, two) && diff_filespec_is_binary(two))) | |
2647 | abbrev = 40; | |
2648 | } | |
2649 | strbuf_addf(msg, "%s%sindex %s..", line_prefix, set, | |
2650 | find_unique_abbrev(one->sha1, abbrev)); | |
2651 | strbuf_addstr(msg, find_unique_abbrev(two->sha1, abbrev)); | |
2652 | if (one->mode == two->mode) | |
2653 | strbuf_addf(msg, " %06o", one->mode); | |
2654 | strbuf_addf(msg, "%s\n", reset); | |
2655 | } | |
2656 | } | |
2657 | ||
2658 | static void run_diff_cmd(const char *pgm, | |
2659 | const char *name, | |
2660 | const char *other, | |
2661 | const char *attr_path, | |
2662 | struct diff_filespec *one, | |
2663 | struct diff_filespec *two, | |
2664 | struct strbuf *msg, | |
2665 | struct diff_options *o, | |
2666 | struct diff_filepair *p) | |
2667 | { | |
2668 | const char *xfrm_msg = NULL; | |
2669 | int complete_rewrite = (p->status == DIFF_STATUS_MODIFIED) && p->score; | |
2670 | int must_show_header = 0; | |
2671 | ||
2672 | if (!DIFF_OPT_TST(o, ALLOW_EXTERNAL)) | |
2673 | pgm = NULL; | |
2674 | else { | |
2675 | struct userdiff_driver *drv = userdiff_find_by_path(attr_path); | |
2676 | if (drv && drv->external) | |
2677 | pgm = drv->external; | |
2678 | } | |
2679 | ||
2680 | if (msg) { | |
2681 | /* | |
2682 | * don't use colors when the header is intended for an | |
2683 | * external diff driver | |
2684 | */ | |
2685 | fill_metainfo(msg, name, other, one, two, o, p, | |
2686 | &must_show_header, | |
2687 | DIFF_OPT_TST(o, COLOR_DIFF) && !pgm); | |
2688 | xfrm_msg = msg->len ? msg->buf : NULL; | |
2689 | } | |
2690 | ||
2691 | if (pgm) { | |
2692 | run_external_diff(pgm, name, other, one, two, xfrm_msg, | |
2693 | complete_rewrite); | |
2694 | return; | |
2695 | } | |
2696 | if (one && two) | |
2697 | builtin_diff(name, other ? other : name, | |
2698 | one, two, xfrm_msg, must_show_header, | |
2699 | o, complete_rewrite); | |
2700 | else | |
2701 | fprintf(o->file, "* Unmerged path %s\n", name); | |
2702 | } | |
2703 | ||
2704 | static void diff_fill_sha1_info(struct diff_filespec *one) | |
2705 | { | |
2706 | if (DIFF_FILE_VALID(one)) { | |
2707 | if (!one->sha1_valid) { | |
2708 | struct stat st; | |
2709 | if (!strcmp(one->path, "-")) { | |
2710 | hashcpy(one->sha1, null_sha1); | |
2711 | return; | |
2712 | } | |
2713 | if (lstat(one->path, &st) < 0) | |
2714 | die_errno("stat '%s'", one->path); | |
2715 | if (index_path(one->sha1, one->path, &st, 0)) | |
2716 | die("cannot hash %s", one->path); | |
2717 | } | |
2718 | } | |
2719 | else | |
2720 | hashclr(one->sha1); | |
2721 | } | |
2722 | ||
2723 | static void strip_prefix(int prefix_length, const char **namep, const char **otherp) | |
2724 | { | |
2725 | /* Strip the prefix but do not molest /dev/null and absolute paths */ | |
2726 | if (*namep && **namep != '/') { | |
2727 | *namep += prefix_length; | |
2728 | if (**namep == '/') | |
2729 | ++*namep; | |
2730 | } | |
2731 | if (*otherp && **otherp != '/') { | |
2732 | *otherp += prefix_length; | |
2733 | if (**otherp == '/') | |
2734 | ++*otherp; | |
2735 | } | |
2736 | } | |
2737 | ||
2738 | static void run_diff(struct diff_filepair *p, struct diff_options *o) | |
2739 | { | |
2740 | const char *pgm = external_diff(); | |
2741 | struct strbuf msg; | |
2742 | struct diff_filespec *one = p->one; | |
2743 | struct diff_filespec *two = p->two; | |
2744 | const char *name; | |
2745 | const char *other; | |
2746 | const char *attr_path; | |
2747 | ||
2748 | name = p->one->path; | |
2749 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
2750 | attr_path = name; | |
2751 | if (o->prefix_length) | |
2752 | strip_prefix(o->prefix_length, &name, &other); | |
2753 | ||
2754 | if (DIFF_PAIR_UNMERGED(p)) { | |
2755 | run_diff_cmd(pgm, name, NULL, attr_path, | |
2756 | NULL, NULL, NULL, o, p); | |
2757 | return; | |
2758 | } | |
2759 | ||
2760 | diff_fill_sha1_info(one); | |
2761 | diff_fill_sha1_info(two); | |
2762 | ||
2763 | if (!pgm && | |
2764 | DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) && | |
2765 | (S_IFMT & one->mode) != (S_IFMT & two->mode)) { | |
2766 | /* | |
2767 | * a filepair that changes between file and symlink | |
2768 | * needs to be split into deletion and creation. | |
2769 | */ | |
2770 | struct diff_filespec *null = alloc_filespec(two->path); | |
2771 | run_diff_cmd(NULL, name, other, attr_path, | |
2772 | one, null, &msg, o, p); | |
2773 | free(null); | |
2774 | strbuf_release(&msg); | |
2775 | ||
2776 | null = alloc_filespec(one->path); | |
2777 | run_diff_cmd(NULL, name, other, attr_path, | |
2778 | null, two, &msg, o, p); | |
2779 | free(null); | |
2780 | } | |
2781 | else | |
2782 | run_diff_cmd(pgm, name, other, attr_path, | |
2783 | one, two, &msg, o, p); | |
2784 | ||
2785 | strbuf_release(&msg); | |
2786 | } | |
2787 | ||
2788 | static void run_diffstat(struct diff_filepair *p, struct diff_options *o, | |
2789 | struct diffstat_t *diffstat) | |
2790 | { | |
2791 | const char *name; | |
2792 | const char *other; | |
2793 | int complete_rewrite = 0; | |
2794 | ||
2795 | if (DIFF_PAIR_UNMERGED(p)) { | |
2796 | /* unmerged */ | |
2797 | builtin_diffstat(p->one->path, NULL, NULL, NULL, diffstat, o, 0); | |
2798 | return; | |
2799 | } | |
2800 | ||
2801 | name = p->one->path; | |
2802 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
2803 | ||
2804 | if (o->prefix_length) | |
2805 | strip_prefix(o->prefix_length, &name, &other); | |
2806 | ||
2807 | diff_fill_sha1_info(p->one); | |
2808 | diff_fill_sha1_info(p->two); | |
2809 | ||
2810 | if (p->status == DIFF_STATUS_MODIFIED && p->score) | |
2811 | complete_rewrite = 1; | |
2812 | builtin_diffstat(name, other, p->one, p->two, diffstat, o, complete_rewrite); | |
2813 | } | |
2814 | ||
2815 | static void run_checkdiff(struct diff_filepair *p, struct diff_options *o) | |
2816 | { | |
2817 | const char *name; | |
2818 | const char *other; | |
2819 | const char *attr_path; | |
2820 | ||
2821 | if (DIFF_PAIR_UNMERGED(p)) { | |
2822 | /* unmerged */ | |
2823 | return; | |
2824 | } | |
2825 | ||
2826 | name = p->one->path; | |
2827 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
2828 | attr_path = other ? other : name; | |
2829 | ||
2830 | if (o->prefix_length) | |
2831 | strip_prefix(o->prefix_length, &name, &other); | |
2832 | ||
2833 | diff_fill_sha1_info(p->one); | |
2834 | diff_fill_sha1_info(p->two); | |
2835 | ||
2836 | builtin_checkdiff(name, other, attr_path, p->one, p->two, o); | |
2837 | } | |
2838 | ||
2839 | void diff_setup(struct diff_options *options) | |
2840 | { | |
2841 | memcpy(options, &default_diff_options, sizeof(*options)); | |
2842 | ||
2843 | options->file = stdout; | |
2844 | ||
2845 | options->line_termination = '\n'; | |
2846 | options->break_opt = -1; | |
2847 | options->rename_limit = -1; | |
2848 | options->dirstat_percent = 3; | |
2849 | options->context = 3; | |
2850 | ||
2851 | options->change = diff_change; | |
2852 | options->add_remove = diff_addremove; | |
2853 | if (diff_use_color_default > 0) | |
2854 | DIFF_OPT_SET(options, COLOR_DIFF); | |
2855 | options->detect_rename = diff_detect_rename_default; | |
2856 | ||
2857 | if (diff_no_prefix) { | |
2858 | options->a_prefix = options->b_prefix = ""; | |
2859 | } else if (!diff_mnemonic_prefix) { | |
2860 | options->a_prefix = "a/"; | |
2861 | options->b_prefix = "b/"; | |
2862 | } | |
2863 | } | |
2864 | ||
2865 | int diff_setup_done(struct diff_options *options) | |
2866 | { | |
2867 | int count = 0; | |
2868 | ||
2869 | if (options->output_format & DIFF_FORMAT_NAME) | |
2870 | count++; | |
2871 | if (options->output_format & DIFF_FORMAT_NAME_STATUS) | |
2872 | count++; | |
2873 | if (options->output_format & DIFF_FORMAT_CHECKDIFF) | |
2874 | count++; | |
2875 | if (options->output_format & DIFF_FORMAT_NO_OUTPUT) | |
2876 | count++; | |
2877 | if (count > 1) | |
2878 | die("--name-only, --name-status, --check and -s are mutually exclusive"); | |
2879 | ||
2880 | /* | |
2881 | * Most of the time we can say "there are changes" | |
2882 | * only by checking if there are changed paths, but | |
2883 | * --ignore-whitespace* options force us to look | |
2884 | * inside contents. | |
2885 | */ | |
2886 | ||
2887 | if (DIFF_XDL_TST(options, IGNORE_WHITESPACE) || | |
2888 | DIFF_XDL_TST(options, IGNORE_WHITESPACE_CHANGE) || | |
2889 | DIFF_XDL_TST(options, IGNORE_WHITESPACE_AT_EOL)) | |
2890 | DIFF_OPT_SET(options, DIFF_FROM_CONTENTS); | |
2891 | else | |
2892 | DIFF_OPT_CLR(options, DIFF_FROM_CONTENTS); | |
2893 | ||
2894 | if (DIFF_OPT_TST(options, FIND_COPIES_HARDER)) | |
2895 | options->detect_rename = DIFF_DETECT_COPY; | |
2896 | ||
2897 | if (!DIFF_OPT_TST(options, RELATIVE_NAME)) | |
2898 | options->prefix = NULL; | |
2899 | if (options->prefix) | |
2900 | options->prefix_length = strlen(options->prefix); | |
2901 | else | |
2902 | options->prefix_length = 0; | |
2903 | ||
2904 | if (options->output_format & (DIFF_FORMAT_NAME | | |
2905 | DIFF_FORMAT_NAME_STATUS | | |
2906 | DIFF_FORMAT_CHECKDIFF | | |
2907 | DIFF_FORMAT_NO_OUTPUT)) | |
2908 | options->output_format &= ~(DIFF_FORMAT_RAW | | |
2909 | DIFF_FORMAT_NUMSTAT | | |
2910 | DIFF_FORMAT_DIFFSTAT | | |
2911 | DIFF_FORMAT_SHORTSTAT | | |
2912 | DIFF_FORMAT_DIRSTAT | | |
2913 | DIFF_FORMAT_SUMMARY | | |
2914 | DIFF_FORMAT_PATCH); | |
2915 | ||
2916 | /* | |
2917 | * These cases always need recursive; we do not drop caller-supplied | |
2918 | * recursive bits for other formats here. | |
2919 | */ | |
2920 | if (options->output_format & (DIFF_FORMAT_PATCH | | |
2921 | DIFF_FORMAT_NUMSTAT | | |
2922 | DIFF_FORMAT_DIFFSTAT | | |
2923 | DIFF_FORMAT_SHORTSTAT | | |
2924 | DIFF_FORMAT_DIRSTAT | | |
2925 | DIFF_FORMAT_SUMMARY | | |
2926 | DIFF_FORMAT_CHECKDIFF)) | |
2927 | DIFF_OPT_SET(options, RECURSIVE); | |
2928 | /* | |
2929 | * Also pickaxe would not work very well if you do not say recursive | |
2930 | */ | |
2931 | if (options->pickaxe) | |
2932 | DIFF_OPT_SET(options, RECURSIVE); | |
2933 | /* | |
2934 | * When patches are generated, submodules diffed against the work tree | |
2935 | * must be checked for dirtiness too so it can be shown in the output | |
2936 | */ | |
2937 | if (options->output_format & DIFF_FORMAT_PATCH) | |
2938 | DIFF_OPT_SET(options, DIRTY_SUBMODULES); | |
2939 | ||
2940 | if (options->detect_rename && options->rename_limit < 0) | |
2941 | options->rename_limit = diff_rename_limit_default; | |
2942 | if (options->setup & DIFF_SETUP_USE_CACHE) { | |
2943 | if (!active_cache) | |
2944 | /* read-cache does not die even when it fails | |
2945 | * so it is safe for us to do this here. Also | |
2946 | * it does not smudge active_cache or active_nr | |
2947 | * when it fails, so we do not have to worry about | |
2948 | * cleaning it up ourselves either. | |
2949 | */ | |
2950 | read_cache(); | |
2951 | } | |
2952 | if (options->abbrev <= 0 || 40 < options->abbrev) | |
2953 | options->abbrev = 40; /* full */ | |
2954 | ||
2955 | /* | |
2956 | * It does not make sense to show the first hit we happened | |
2957 | * to have found. It does not make sense not to return with | |
2958 | * exit code in such a case either. | |
2959 | */ | |
2960 | if (DIFF_OPT_TST(options, QUICK)) { | |
2961 | options->output_format = DIFF_FORMAT_NO_OUTPUT; | |
2962 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); | |
2963 | } | |
2964 | ||
2965 | return 0; | |
2966 | } | |
2967 | ||
2968 | static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val) | |
2969 | { | |
2970 | char c, *eq; | |
2971 | int len; | |
2972 | ||
2973 | if (*arg != '-') | |
2974 | return 0; | |
2975 | c = *++arg; | |
2976 | if (!c) | |
2977 | return 0; | |
2978 | if (c == arg_short) { | |
2979 | c = *++arg; | |
2980 | if (!c) | |
2981 | return 1; | |
2982 | if (val && isdigit(c)) { | |
2983 | char *end; | |
2984 | int n = strtoul(arg, &end, 10); | |
2985 | if (*end) | |
2986 | return 0; | |
2987 | *val = n; | |
2988 | return 1; | |
2989 | } | |
2990 | return 0; | |
2991 | } | |
2992 | if (c != '-') | |
2993 | return 0; | |
2994 | arg++; | |
2995 | eq = strchr(arg, '='); | |
2996 | if (eq) | |
2997 | len = eq - arg; | |
2998 | else | |
2999 | len = strlen(arg); | |
3000 | if (!len || strncmp(arg, arg_long, len)) | |
3001 | return 0; | |
3002 | if (eq) { | |
3003 | int n; | |
3004 | char *end; | |
3005 | if (!isdigit(*++eq)) | |
3006 | return 0; | |
3007 | n = strtoul(eq, &end, 10); | |
3008 | if (*end) | |
3009 | return 0; | |
3010 | *val = n; | |
3011 | } | |
3012 | return 1; | |
3013 | } | |
3014 | ||
3015 | static int diff_scoreopt_parse(const char *opt); | |
3016 | ||
3017 | static inline int short_opt(char opt, const char **argv, | |
3018 | const char **optarg) | |
3019 | { | |
3020 | const char *arg = argv[0]; | |
3021 | if (arg[0] != '-' || arg[1] != opt) | |
3022 | return 0; | |
3023 | if (arg[2] != '\0') { | |
3024 | *optarg = arg + 2; | |
3025 | return 1; | |
3026 | } | |
3027 | if (!argv[1]) | |
3028 | die("Option '%c' requires a value", opt); | |
3029 | *optarg = argv[1]; | |
3030 | return 2; | |
3031 | } | |
3032 | ||
3033 | int parse_long_opt(const char *opt, const char **argv, | |
3034 | const char **optarg) | |
3035 | { | |
3036 | const char *arg = argv[0]; | |
3037 | if (arg[0] != '-' || arg[1] != '-') | |
3038 | return 0; | |
3039 | arg += strlen("--"); | |
3040 | if (prefixcmp(arg, opt)) | |
3041 | return 0; | |
3042 | arg += strlen(opt); | |
3043 | if (*arg == '=') { /* sticked form: --option=value */ | |
3044 | *optarg = arg + 1; | |
3045 | return 1; | |
3046 | } | |
3047 | if (*arg != '\0') | |
3048 | return 0; | |
3049 | /* separate form: --option value */ | |
3050 | if (!argv[1]) | |
3051 | die("Option '--%s' requires a value", opt); | |
3052 | *optarg = argv[1]; | |
3053 | return 2; | |
3054 | } | |
3055 | ||
3056 | static int stat_opt(struct diff_options *options, const char **av) | |
3057 | { | |
3058 | const char *arg = av[0]; | |
3059 | char *end; | |
3060 | int width = options->stat_width; | |
3061 | int name_width = options->stat_name_width; | |
3062 | int argcount = 1; | |
3063 | ||
3064 | arg += strlen("--stat"); | |
3065 | end = (char *)arg; | |
3066 | ||
3067 | switch (*arg) { | |
3068 | case '-': | |
3069 | if (!prefixcmp(arg, "-width")) { | |
3070 | arg += strlen("-width"); | |
3071 | if (*arg == '=') | |
3072 | width = strtoul(arg + 1, &end, 10); | |
3073 | else if (!*arg && !av[1]) | |
3074 | die("Option '--stat-width' requires a value"); | |
3075 | else if (!*arg) { | |
3076 | width = strtoul(av[1], &end, 10); | |
3077 | argcount = 2; | |
3078 | } | |
3079 | } else if (!prefixcmp(arg, "-name-width")) { | |
3080 | arg += strlen("-name-width"); | |
3081 | if (*arg == '=') | |
3082 | name_width = strtoul(arg + 1, &end, 10); | |
3083 | else if (!*arg && !av[1]) | |
3084 | die("Option '--stat-name-width' requires a value"); | |
3085 | else if (!*arg) { | |
3086 | name_width = strtoul(av[1], &end, 10); | |
3087 | argcount = 2; | |
3088 | } | |
3089 | } | |
3090 | break; | |
3091 | case '=': | |
3092 | width = strtoul(arg+1, &end, 10); | |
3093 | if (*end == ',') | |
3094 | name_width = strtoul(end+1, &end, 10); | |
3095 | } | |
3096 | ||
3097 | /* Important! This checks all the error cases! */ | |
3098 | if (*end) | |
3099 | return 0; | |
3100 | options->output_format |= DIFF_FORMAT_DIFFSTAT; | |
3101 | options->stat_name_width = name_width; | |
3102 | options->stat_width = width; | |
3103 | return argcount; | |
3104 | } | |
3105 | ||
3106 | int diff_opt_parse(struct diff_options *options, const char **av, int ac) | |
3107 | { | |
3108 | const char *arg = av[0]; | |
3109 | const char *optarg; | |
3110 | int argcount; | |
3111 | ||
3112 | /* Output format options */ | |
3113 | if (!strcmp(arg, "-p") || !strcmp(arg, "-u") || !strcmp(arg, "--patch")) | |
3114 | options->output_format |= DIFF_FORMAT_PATCH; | |
3115 | else if (opt_arg(arg, 'U', "unified", &options->context)) | |
3116 | options->output_format |= DIFF_FORMAT_PATCH; | |
3117 | else if (!strcmp(arg, "--raw")) | |
3118 | options->output_format |= DIFF_FORMAT_RAW; | |
3119 | else if (!strcmp(arg, "--patch-with-raw")) | |
3120 | options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_RAW; | |
3121 | else if (!strcmp(arg, "--numstat")) | |
3122 | options->output_format |= DIFF_FORMAT_NUMSTAT; | |
3123 | else if (!strcmp(arg, "--shortstat")) | |
3124 | options->output_format |= DIFF_FORMAT_SHORTSTAT; | |
3125 | else if (opt_arg(arg, 'X', "dirstat", &options->dirstat_percent)) | |
3126 | options->output_format |= DIFF_FORMAT_DIRSTAT; | |
3127 | else if (!strcmp(arg, "--cumulative")) { | |
3128 | options->output_format |= DIFF_FORMAT_DIRSTAT; | |
3129 | DIFF_OPT_SET(options, DIRSTAT_CUMULATIVE); | |
3130 | } else if (opt_arg(arg, 0, "dirstat-by-file", | |
3131 | &options->dirstat_percent)) { | |
3132 | options->output_format |= DIFF_FORMAT_DIRSTAT; | |
3133 | DIFF_OPT_SET(options, DIRSTAT_BY_FILE); | |
3134 | } | |
3135 | else if (!strcmp(arg, "--check")) | |
3136 | options->output_format |= DIFF_FORMAT_CHECKDIFF; | |
3137 | else if (!strcmp(arg, "--summary")) | |
3138 | options->output_format |= DIFF_FORMAT_SUMMARY; | |
3139 | else if (!strcmp(arg, "--patch-with-stat")) | |
3140 | options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_DIFFSTAT; | |
3141 | else if (!strcmp(arg, "--name-only")) | |
3142 | options->output_format |= DIFF_FORMAT_NAME; | |
3143 | else if (!strcmp(arg, "--name-status")) | |
3144 | options->output_format |= DIFF_FORMAT_NAME_STATUS; | |
3145 | else if (!strcmp(arg, "-s")) | |
3146 | options->output_format |= DIFF_FORMAT_NO_OUTPUT; | |
3147 | else if (!prefixcmp(arg, "--stat")) | |
3148 | /* --stat, --stat-width, or --stat-name-width */ | |
3149 | return stat_opt(options, av); | |
3150 | ||
3151 | /* renames options */ | |
3152 | else if (!prefixcmp(arg, "-B") || !prefixcmp(arg, "--break-rewrites=") || | |
3153 | !strcmp(arg, "--break-rewrites")) { | |
3154 | if ((options->break_opt = diff_scoreopt_parse(arg)) == -1) | |
3155 | return error("invalid argument to -B: %s", arg+2); | |
3156 | } | |
3157 | else if (!prefixcmp(arg, "-M") || !prefixcmp(arg, "--find-renames=") || | |
3158 | !strcmp(arg, "--find-renames")) { | |
3159 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) | |
3160 | return error("invalid argument to -M: %s", arg+2); | |
3161 | options->detect_rename = DIFF_DETECT_RENAME; | |
3162 | } | |
3163 | else if (!prefixcmp(arg, "-C") || !prefixcmp(arg, "--find-copies=") || | |
3164 | !strcmp(arg, "--find-copies")) { | |
3165 | if (options->detect_rename == DIFF_DETECT_COPY) | |
3166 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); | |
3167 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) | |
3168 | return error("invalid argument to -C: %s", arg+2); | |
3169 | options->detect_rename = DIFF_DETECT_COPY; | |
3170 | } | |
3171 | else if (!strcmp(arg, "--no-renames")) | |
3172 | options->detect_rename = 0; | |
3173 | else if (!strcmp(arg, "--relative")) | |
3174 | DIFF_OPT_SET(options, RELATIVE_NAME); | |
3175 | else if (!prefixcmp(arg, "--relative=")) { | |
3176 | DIFF_OPT_SET(options, RELATIVE_NAME); | |
3177 | options->prefix = arg + 11; | |
3178 | } | |
3179 | ||
3180 | /* xdiff options */ | |
3181 | else if (!strcmp(arg, "-w") || !strcmp(arg, "--ignore-all-space")) | |
3182 | DIFF_XDL_SET(options, IGNORE_WHITESPACE); | |
3183 | else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change")) | |
3184 | DIFF_XDL_SET(options, IGNORE_WHITESPACE_CHANGE); | |
3185 | else if (!strcmp(arg, "--ignore-space-at-eol")) | |
3186 | DIFF_XDL_SET(options, IGNORE_WHITESPACE_AT_EOL); | |
3187 | else if (!strcmp(arg, "--patience")) | |
3188 | DIFF_XDL_SET(options, PATIENCE_DIFF); | |
3189 | ||
3190 | /* flags options */ | |
3191 | else if (!strcmp(arg, "--binary")) { | |
3192 | options->output_format |= DIFF_FORMAT_PATCH; | |
3193 | DIFF_OPT_SET(options, BINARY); | |
3194 | } | |
3195 | else if (!strcmp(arg, "--full-index")) | |
3196 | DIFF_OPT_SET(options, FULL_INDEX); | |
3197 | else if (!strcmp(arg, "-a") || !strcmp(arg, "--text")) | |
3198 | DIFF_OPT_SET(options, TEXT); | |
3199 | else if (!strcmp(arg, "-R")) | |
3200 | DIFF_OPT_SET(options, REVERSE_DIFF); | |
3201 | else if (!strcmp(arg, "--find-copies-harder")) | |
3202 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); | |
3203 | else if (!strcmp(arg, "--follow")) | |
3204 | DIFF_OPT_SET(options, FOLLOW_RENAMES); | |
3205 | else if (!strcmp(arg, "--color")) | |
3206 | DIFF_OPT_SET(options, COLOR_DIFF); | |
3207 | else if (!prefixcmp(arg, "--color=")) { | |
3208 | int value = git_config_colorbool(NULL, arg+8, -1); | |
3209 | if (value == 0) | |
3210 | DIFF_OPT_CLR(options, COLOR_DIFF); | |
3211 | else if (value > 0) | |
3212 | DIFF_OPT_SET(options, COLOR_DIFF); | |
3213 | else | |
3214 | return error("option `color' expects \"always\", \"auto\", or \"never\""); | |
3215 | } | |
3216 | else if (!strcmp(arg, "--no-color")) | |
3217 | DIFF_OPT_CLR(options, COLOR_DIFF); | |
3218 | else if (!strcmp(arg, "--color-words")) { | |
3219 | DIFF_OPT_SET(options, COLOR_DIFF); | |
3220 | options->word_diff = DIFF_WORDS_COLOR; | |
3221 | } | |
3222 | else if (!prefixcmp(arg, "--color-words=")) { | |
3223 | DIFF_OPT_SET(options, COLOR_DIFF); | |
3224 | options->word_diff = DIFF_WORDS_COLOR; | |
3225 | options->word_regex = arg + 14; | |
3226 | } | |
3227 | else if (!strcmp(arg, "--word-diff")) { | |
3228 | if (options->word_diff == DIFF_WORDS_NONE) | |
3229 | options->word_diff = DIFF_WORDS_PLAIN; | |
3230 | } | |
3231 | else if (!prefixcmp(arg, "--word-diff=")) { | |
3232 | const char *type = arg + 12; | |
3233 | if (!strcmp(type, "plain")) | |
3234 | options->word_diff = DIFF_WORDS_PLAIN; | |
3235 | else if (!strcmp(type, "color")) { | |
3236 | DIFF_OPT_SET(options, COLOR_DIFF); | |
3237 | options->word_diff = DIFF_WORDS_COLOR; | |
3238 | } | |
3239 | else if (!strcmp(type, "porcelain")) | |
3240 | options->word_diff = DIFF_WORDS_PORCELAIN; | |
3241 | else if (!strcmp(type, "none")) | |
3242 | options->word_diff = DIFF_WORDS_NONE; | |
3243 | else | |
3244 | die("bad --word-diff argument: %s", type); | |
3245 | } | |
3246 | else if ((argcount = parse_long_opt("word-diff-regex", av, &optarg))) { | |
3247 | if (options->word_diff == DIFF_WORDS_NONE) | |
3248 | options->word_diff = DIFF_WORDS_PLAIN; | |
3249 | options->word_regex = optarg; | |
3250 | return argcount; | |
3251 | } | |
3252 | else if (!strcmp(arg, "--exit-code")) | |
3253 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); | |
3254 | else if (!strcmp(arg, "--quiet")) | |
3255 | DIFF_OPT_SET(options, QUICK); | |
3256 | else if (!strcmp(arg, "--ext-diff")) | |
3257 | DIFF_OPT_SET(options, ALLOW_EXTERNAL); | |
3258 | else if (!strcmp(arg, "--no-ext-diff")) | |
3259 | DIFF_OPT_CLR(options, ALLOW_EXTERNAL); | |
3260 | else if (!strcmp(arg, "--textconv")) | |
3261 | DIFF_OPT_SET(options, ALLOW_TEXTCONV); | |
3262 | else if (!strcmp(arg, "--no-textconv")) | |
3263 | DIFF_OPT_CLR(options, ALLOW_TEXTCONV); | |
3264 | else if (!strcmp(arg, "--ignore-submodules")) { | |
3265 | DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); | |
3266 | handle_ignore_submodules_arg(options, "all"); | |
3267 | } else if (!prefixcmp(arg, "--ignore-submodules=")) { | |
3268 | DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); | |
3269 | handle_ignore_submodules_arg(options, arg + 20); | |
3270 | } else if (!strcmp(arg, "--submodule")) | |
3271 | DIFF_OPT_SET(options, SUBMODULE_LOG); | |
3272 | else if (!prefixcmp(arg, "--submodule=")) { | |
3273 | if (!strcmp(arg + 12, "log")) | |
3274 | DIFF_OPT_SET(options, SUBMODULE_LOG); | |
3275 | } | |
3276 | ||
3277 | /* misc options */ | |
3278 | else if (!strcmp(arg, "-z")) | |
3279 | options->line_termination = 0; | |
3280 | else if ((argcount = short_opt('l', av, &optarg))) { | |
3281 | options->rename_limit = strtoul(optarg, NULL, 10); | |
3282 | return argcount; | |
3283 | } | |
3284 | else if ((argcount = short_opt('S', av, &optarg))) { | |
3285 | options->pickaxe = optarg; | |
3286 | options->pickaxe_opts |= DIFF_PICKAXE_KIND_S; | |
3287 | return argcount; | |
3288 | } else if ((argcount = short_opt('G', av, &optarg))) { | |
3289 | options->pickaxe = optarg; | |
3290 | options->pickaxe_opts |= DIFF_PICKAXE_KIND_G; | |
3291 | return argcount; | |
3292 | } | |
3293 | else if (!strcmp(arg, "--pickaxe-all")) | |
3294 | options->pickaxe_opts |= DIFF_PICKAXE_ALL; | |
3295 | else if (!strcmp(arg, "--pickaxe-regex")) | |
3296 | options->pickaxe_opts |= DIFF_PICKAXE_REGEX; | |
3297 | else if ((argcount = short_opt('O', av, &optarg))) { | |
3298 | options->orderfile = optarg; | |
3299 | return argcount; | |
3300 | } | |
3301 | else if ((argcount = parse_long_opt("diff-filter", av, &optarg))) { | |
3302 | options->filter = optarg; | |
3303 | return argcount; | |
3304 | } | |
3305 | else if (!strcmp(arg, "--abbrev")) | |
3306 | options->abbrev = DEFAULT_ABBREV; | |
3307 | else if (!prefixcmp(arg, "--abbrev=")) { | |
3308 | options->abbrev = strtoul(arg + 9, NULL, 10); | |
3309 | if (options->abbrev < MINIMUM_ABBREV) | |
3310 | options->abbrev = MINIMUM_ABBREV; | |
3311 | else if (40 < options->abbrev) | |
3312 | options->abbrev = 40; | |
3313 | } | |
3314 | else if ((argcount = parse_long_opt("src-prefix", av, &optarg))) { | |
3315 | options->a_prefix = optarg; | |
3316 | return argcount; | |
3317 | } | |
3318 | else if ((argcount = parse_long_opt("dst-prefix", av, &optarg))) { | |
3319 | options->b_prefix = optarg; | |
3320 | return argcount; | |
3321 | } | |
3322 | else if (!strcmp(arg, "--no-prefix")) | |
3323 | options->a_prefix = options->b_prefix = ""; | |
3324 | else if (opt_arg(arg, '\0', "inter-hunk-context", | |
3325 | &options->interhunkcontext)) | |
3326 | ; | |
3327 | else if ((argcount = parse_long_opt("output", av, &optarg))) { | |
3328 | options->file = fopen(optarg, "w"); | |
3329 | if (!options->file) | |
3330 | die_errno("Could not open '%s'", optarg); | |
3331 | options->close_file = 1; | |
3332 | return argcount; | |
3333 | } else | |
3334 | return 0; | |
3335 | return 1; | |
3336 | } | |
3337 | ||
3338 | int parse_rename_score(const char **cp_p) | |
3339 | { | |
3340 | unsigned long num, scale; | |
3341 | int ch, dot; | |
3342 | const char *cp = *cp_p; | |
3343 | ||
3344 | num = 0; | |
3345 | scale = 1; | |
3346 | dot = 0; | |
3347 | for (;;) { | |
3348 | ch = *cp; | |
3349 | if ( !dot && ch == '.' ) { | |
3350 | scale = 1; | |
3351 | dot = 1; | |
3352 | } else if ( ch == '%' ) { | |
3353 | scale = dot ? scale*100 : 100; | |
3354 | cp++; /* % is always at the end */ | |
3355 | break; | |
3356 | } else if ( ch >= '0' && ch <= '9' ) { | |
3357 | if ( scale < 100000 ) { | |
3358 | scale *= 10; | |
3359 | num = (num*10) + (ch-'0'); | |
3360 | } | |
3361 | } else { | |
3362 | break; | |
3363 | } | |
3364 | cp++; | |
3365 | } | |
3366 | *cp_p = cp; | |
3367 | ||
3368 | /* user says num divided by scale and we say internally that | |
3369 | * is MAX_SCORE * num / scale. | |
3370 | */ | |
3371 | return (int)((num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale)); | |
3372 | } | |
3373 | ||
3374 | static int diff_scoreopt_parse(const char *opt) | |
3375 | { | |
3376 | int opt1, opt2, cmd; | |
3377 | ||
3378 | if (*opt++ != '-') | |
3379 | return -1; | |
3380 | cmd = *opt++; | |
3381 | if (cmd == '-') { | |
3382 | /* convert the long-form arguments into short-form versions */ | |
3383 | if (!prefixcmp(opt, "break-rewrites")) { | |
3384 | opt += strlen("break-rewrites"); | |
3385 | if (*opt == 0 || *opt++ == '=') | |
3386 | cmd = 'B'; | |
3387 | } else if (!prefixcmp(opt, "find-copies")) { | |
3388 | opt += strlen("find-copies"); | |
3389 | if (*opt == 0 || *opt++ == '=') | |
3390 | cmd = 'C'; | |
3391 | } else if (!prefixcmp(opt, "find-renames")) { | |
3392 | opt += strlen("find-renames"); | |
3393 | if (*opt == 0 || *opt++ == '=') | |
3394 | cmd = 'M'; | |
3395 | } | |
3396 | } | |
3397 | if (cmd != 'M' && cmd != 'C' && cmd != 'B') | |
3398 | return -1; /* that is not a -M, -C nor -B option */ | |
3399 | ||
3400 | opt1 = parse_rename_score(&opt); | |
3401 | if (cmd != 'B') | |
3402 | opt2 = 0; | |
3403 | else { | |
3404 | if (*opt == 0) | |
3405 | opt2 = 0; | |
3406 | else if (*opt != '/') | |
3407 | return -1; /* we expect -B80/99 or -B80 */ | |
3408 | else { | |
3409 | opt++; | |
3410 | opt2 = parse_rename_score(&opt); | |
3411 | } | |
3412 | } | |
3413 | if (*opt != 0) | |
3414 | return -1; | |
3415 | return opt1 | (opt2 << 16); | |
3416 | } | |
3417 | ||
3418 | struct diff_queue_struct diff_queued_diff; | |
3419 | ||
3420 | void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp) | |
3421 | { | |
3422 | if (queue->alloc <= queue->nr) { | |
3423 | queue->alloc = alloc_nr(queue->alloc); | |
3424 | queue->queue = xrealloc(queue->queue, | |
3425 | sizeof(dp) * queue->alloc); | |
3426 | } | |
3427 | queue->queue[queue->nr++] = dp; | |
3428 | } | |
3429 | ||
3430 | struct diff_filepair *diff_queue(struct diff_queue_struct *queue, | |
3431 | struct diff_filespec *one, | |
3432 | struct diff_filespec *two) | |
3433 | { | |
3434 | struct diff_filepair *dp = xcalloc(1, sizeof(*dp)); | |
3435 | dp->one = one; | |
3436 | dp->two = two; | |
3437 | if (queue) | |
3438 | diff_q(queue, dp); | |
3439 | return dp; | |
3440 | } | |
3441 | ||
3442 | void diff_free_filepair(struct diff_filepair *p) | |
3443 | { | |
3444 | free_filespec(p->one); | |
3445 | free_filespec(p->two); | |
3446 | free(p); | |
3447 | } | |
3448 | ||
3449 | /* This is different from find_unique_abbrev() in that | |
3450 | * it stuffs the result with dots for alignment. | |
3451 | */ | |
3452 | const char *diff_unique_abbrev(const unsigned char *sha1, int len) | |
3453 | { | |
3454 | int abblen; | |
3455 | const char *abbrev; | |
3456 | if (len == 40) | |
3457 | return sha1_to_hex(sha1); | |
3458 | ||
3459 | abbrev = find_unique_abbrev(sha1, len); | |
3460 | abblen = strlen(abbrev); | |
3461 | if (abblen < 37) { | |
3462 | static char hex[41]; | |
3463 | if (len < abblen && abblen <= len + 2) | |
3464 | sprintf(hex, "%s%.*s", abbrev, len+3-abblen, ".."); | |
3465 | else | |
3466 | sprintf(hex, "%s...", abbrev); | |
3467 | return hex; | |
3468 | } | |
3469 | return sha1_to_hex(sha1); | |
3470 | } | |
3471 | ||
3472 | static void diff_flush_raw(struct diff_filepair *p, struct diff_options *opt) | |
3473 | { | |
3474 | int line_termination = opt->line_termination; | |
3475 | int inter_name_termination = line_termination ? '\t' : '\0'; | |
3476 | if (opt->output_prefix) { | |
3477 | struct strbuf *msg = NULL; | |
3478 | msg = opt->output_prefix(opt, opt->output_prefix_data); | |
3479 | fprintf(opt->file, "%s", msg->buf); | |
3480 | } | |
3481 | ||
3482 | if (!(opt->output_format & DIFF_FORMAT_NAME_STATUS)) { | |
3483 | fprintf(opt->file, ":%06o %06o %s ", p->one->mode, p->two->mode, | |
3484 | diff_unique_abbrev(p->one->sha1, opt->abbrev)); | |
3485 | fprintf(opt->file, "%s ", diff_unique_abbrev(p->two->sha1, opt->abbrev)); | |
3486 | } | |
3487 | if (p->score) { | |
3488 | fprintf(opt->file, "%c%03d%c", p->status, similarity_index(p), | |
3489 | inter_name_termination); | |
3490 | } else { | |
3491 | fprintf(opt->file, "%c%c", p->status, inter_name_termination); | |
3492 | } | |
3493 | ||
3494 | if (p->status == DIFF_STATUS_COPIED || | |
3495 | p->status == DIFF_STATUS_RENAMED) { | |
3496 | const char *name_a, *name_b; | |
3497 | name_a = p->one->path; | |
3498 | name_b = p->two->path; | |
3499 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
3500 | write_name_quoted(name_a, opt->file, inter_name_termination); | |
3501 | write_name_quoted(name_b, opt->file, line_termination); | |
3502 | } else { | |
3503 | const char *name_a, *name_b; | |
3504 | name_a = p->one->mode ? p->one->path : p->two->path; | |
3505 | name_b = NULL; | |
3506 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
3507 | write_name_quoted(name_a, opt->file, line_termination); | |
3508 | } | |
3509 | } | |
3510 | ||
3511 | int diff_unmodified_pair(struct diff_filepair *p) | |
3512 | { | |
3513 | /* This function is written stricter than necessary to support | |
3514 | * the currently implemented transformers, but the idea is to | |
3515 | * let transformers to produce diff_filepairs any way they want, | |
3516 | * and filter and clean them up here before producing the output. | |
3517 | */ | |
3518 | struct diff_filespec *one = p->one, *two = p->two; | |
3519 | ||
3520 | if (DIFF_PAIR_UNMERGED(p)) | |
3521 | return 0; /* unmerged is interesting */ | |
3522 | ||
3523 | /* deletion, addition, mode or type change | |
3524 | * and rename are all interesting. | |
3525 | */ | |
3526 | if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) || | |
3527 | DIFF_PAIR_MODE_CHANGED(p) || | |
3528 | strcmp(one->path, two->path)) | |
3529 | return 0; | |
3530 | ||
3531 | /* both are valid and point at the same path. that is, we are | |
3532 | * dealing with a change. | |
3533 | */ | |
3534 | if (one->sha1_valid && two->sha1_valid && | |
3535 | !hashcmp(one->sha1, two->sha1) && | |
3536 | !one->dirty_submodule && !two->dirty_submodule) | |
3537 | return 1; /* no change */ | |
3538 | if (!one->sha1_valid && !two->sha1_valid) | |
3539 | return 1; /* both look at the same file on the filesystem. */ | |
3540 | return 0; | |
3541 | } | |
3542 | ||
3543 | static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o) | |
3544 | { | |
3545 | if (diff_unmodified_pair(p)) | |
3546 | return; | |
3547 | ||
3548 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
3549 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
3550 | return; /* no tree diffs in patch format */ | |
3551 | ||
3552 | run_diff(p, o); | |
3553 | } | |
3554 | ||
3555 | static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o, | |
3556 | struct diffstat_t *diffstat) | |
3557 | { | |
3558 | if (diff_unmodified_pair(p)) | |
3559 | return; | |
3560 | ||
3561 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
3562 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
3563 | return; /* no useful stat for tree diffs */ | |
3564 | ||
3565 | run_diffstat(p, o, diffstat); | |
3566 | } | |
3567 | ||
3568 | static void diff_flush_checkdiff(struct diff_filepair *p, | |
3569 | struct diff_options *o) | |
3570 | { | |
3571 | if (diff_unmodified_pair(p)) | |
3572 | return; | |
3573 | ||
3574 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
3575 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
3576 | return; /* nothing to check in tree diffs */ | |
3577 | ||
3578 | run_checkdiff(p, o); | |
3579 | } | |
3580 | ||
3581 | int diff_queue_is_empty(void) | |
3582 | { | |
3583 | struct diff_queue_struct *q = &diff_queued_diff; | |
3584 | int i; | |
3585 | for (i = 0; i < q->nr; i++) | |
3586 | if (!diff_unmodified_pair(q->queue[i])) | |
3587 | return 0; | |
3588 | return 1; | |
3589 | } | |
3590 | ||
3591 | #if DIFF_DEBUG | |
3592 | void diff_debug_filespec(struct diff_filespec *s, int x, const char *one) | |
3593 | { | |
3594 | fprintf(stderr, "queue[%d] %s (%s) %s %06o %s\n", | |
3595 | x, one ? one : "", | |
3596 | s->path, | |
3597 | DIFF_FILE_VALID(s) ? "valid" : "invalid", | |
3598 | s->mode, | |
3599 | s->sha1_valid ? sha1_to_hex(s->sha1) : ""); | |
3600 | fprintf(stderr, "queue[%d] %s size %lu flags %d\n", | |
3601 | x, one ? one : "", | |
3602 | s->size, s->xfrm_flags); | |
3603 | } | |
3604 | ||
3605 | void diff_debug_filepair(const struct diff_filepair *p, int i) | |
3606 | { | |
3607 | diff_debug_filespec(p->one, i, "one"); | |
3608 | diff_debug_filespec(p->two, i, "two"); | |
3609 | fprintf(stderr, "score %d, status %c rename_used %d broken %d\n", | |
3610 | p->score, p->status ? p->status : '?', | |
3611 | p->one->rename_used, p->broken_pair); | |
3612 | } | |
3613 | ||
3614 | void diff_debug_queue(const char *msg, struct diff_queue_struct *q) | |
3615 | { | |
3616 | int i; | |
3617 | if (msg) | |
3618 | fprintf(stderr, "%s\n", msg); | |
3619 | fprintf(stderr, "q->nr = %d\n", q->nr); | |
3620 | for (i = 0; i < q->nr; i++) { | |
3621 | struct diff_filepair *p = q->queue[i]; | |
3622 | diff_debug_filepair(p, i); | |
3623 | } | |
3624 | } | |
3625 | #endif | |
3626 | ||
3627 | static void diff_resolve_rename_copy(void) | |
3628 | { | |
3629 | int i; | |
3630 | struct diff_filepair *p; | |
3631 | struct diff_queue_struct *q = &diff_queued_diff; | |
3632 | ||
3633 | diff_debug_queue("resolve-rename-copy", q); | |
3634 | ||
3635 | for (i = 0; i < q->nr; i++) { | |
3636 | p = q->queue[i]; | |
3637 | p->status = 0; /* undecided */ | |
3638 | if (DIFF_PAIR_UNMERGED(p)) | |
3639 | p->status = DIFF_STATUS_UNMERGED; | |
3640 | else if (!DIFF_FILE_VALID(p->one)) | |
3641 | p->status = DIFF_STATUS_ADDED; | |
3642 | else if (!DIFF_FILE_VALID(p->two)) | |
3643 | p->status = DIFF_STATUS_DELETED; | |
3644 | else if (DIFF_PAIR_TYPE_CHANGED(p)) | |
3645 | p->status = DIFF_STATUS_TYPE_CHANGED; | |
3646 | ||
3647 | /* from this point on, we are dealing with a pair | |
3648 | * whose both sides are valid and of the same type, i.e. | |
3649 | * either in-place edit or rename/copy edit. | |
3650 | */ | |
3651 | else if (DIFF_PAIR_RENAME(p)) { | |
3652 | /* | |
3653 | * A rename might have re-connected a broken | |
3654 | * pair up, causing the pathnames to be the | |
3655 | * same again. If so, that's not a rename at | |
3656 | * all, just a modification.. | |
3657 | * | |
3658 | * Otherwise, see if this source was used for | |
3659 | * multiple renames, in which case we decrement | |
3660 | * the count, and call it a copy. | |
3661 | */ | |
3662 | if (!strcmp(p->one->path, p->two->path)) | |
3663 | p->status = DIFF_STATUS_MODIFIED; | |
3664 | else if (--p->one->rename_used > 0) | |
3665 | p->status = DIFF_STATUS_COPIED; | |
3666 | else | |
3667 | p->status = DIFF_STATUS_RENAMED; | |
3668 | } | |
3669 | else if (hashcmp(p->one->sha1, p->two->sha1) || | |
3670 | p->one->mode != p->two->mode || | |
3671 | p->one->dirty_submodule || | |
3672 | p->two->dirty_submodule || | |
3673 | is_null_sha1(p->one->sha1)) | |
3674 | p->status = DIFF_STATUS_MODIFIED; | |
3675 | else { | |
3676 | /* This is a "no-change" entry and should not | |
3677 | * happen anymore, but prepare for broken callers. | |
3678 | */ | |
3679 | error("feeding unmodified %s to diffcore", | |
3680 | p->one->path); | |
3681 | p->status = DIFF_STATUS_UNKNOWN; | |
3682 | } | |
3683 | } | |
3684 | diff_debug_queue("resolve-rename-copy done", q); | |
3685 | } | |
3686 | ||
3687 | static int check_pair_status(struct diff_filepair *p) | |
3688 | { | |
3689 | switch (p->status) { | |
3690 | case DIFF_STATUS_UNKNOWN: | |
3691 | return 0; | |
3692 | case 0: | |
3693 | die("internal error in diff-resolve-rename-copy"); | |
3694 | default: | |
3695 | return 1; | |
3696 | } | |
3697 | } | |
3698 | ||
3699 | static void flush_one_pair(struct diff_filepair *p, struct diff_options *opt) | |
3700 | { | |
3701 | int fmt = opt->output_format; | |
3702 | ||
3703 | if (fmt & DIFF_FORMAT_CHECKDIFF) | |
3704 | diff_flush_checkdiff(p, opt); | |
3705 | else if (fmt & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS)) | |
3706 | diff_flush_raw(p, opt); | |
3707 | else if (fmt & DIFF_FORMAT_NAME) { | |
3708 | const char *name_a, *name_b; | |
3709 | name_a = p->two->path; | |
3710 | name_b = NULL; | |
3711 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
3712 | write_name_quoted(name_a, opt->file, opt->line_termination); | |
3713 | } | |
3714 | } | |
3715 | ||
3716 | static void show_file_mode_name(FILE *file, const char *newdelete, struct diff_filespec *fs) | |
3717 | { | |
3718 | if (fs->mode) | |
3719 | fprintf(file, " %s mode %06o ", newdelete, fs->mode); | |
3720 | else | |
3721 | fprintf(file, " %s ", newdelete); | |
3722 | write_name_quoted(fs->path, file, '\n'); | |
3723 | } | |
3724 | ||
3725 | ||
3726 | static void show_mode_change(FILE *file, struct diff_filepair *p, int show_name, | |
3727 | const char *line_prefix) | |
3728 | { | |
3729 | if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) { | |
3730 | fprintf(file, "%s mode change %06o => %06o%c", line_prefix, p->one->mode, | |
3731 | p->two->mode, show_name ? ' ' : '\n'); | |
3732 | if (show_name) { | |
3733 | write_name_quoted(p->two->path, file, '\n'); | |
3734 | } | |
3735 | } | |
3736 | } | |
3737 | ||
3738 | static void show_rename_copy(FILE *file, const char *renamecopy, struct diff_filepair *p, | |
3739 | const char *line_prefix) | |
3740 | { | |
3741 | char *names = pprint_rename(p->one->path, p->two->path); | |
3742 | ||
3743 | fprintf(file, " %s %s (%d%%)\n", renamecopy, names, similarity_index(p)); | |
3744 | free(names); | |
3745 | show_mode_change(file, p, 0, line_prefix); | |
3746 | } | |
3747 | ||
3748 | static void diff_summary(struct diff_options *opt, struct diff_filepair *p) | |
3749 | { | |
3750 | FILE *file = opt->file; | |
3751 | char *line_prefix = ""; | |
3752 | ||
3753 | if (opt->output_prefix) { | |
3754 | struct strbuf *buf = opt->output_prefix(opt, opt->output_prefix_data); | |
3755 | line_prefix = buf->buf; | |
3756 | } | |
3757 | ||
3758 | switch(p->status) { | |
3759 | case DIFF_STATUS_DELETED: | |
3760 | fputs(line_prefix, file); | |
3761 | show_file_mode_name(file, "delete", p->one); | |
3762 | break; | |
3763 | case DIFF_STATUS_ADDED: | |
3764 | fputs(line_prefix, file); | |
3765 | show_file_mode_name(file, "create", p->two); | |
3766 | break; | |
3767 | case DIFF_STATUS_COPIED: | |
3768 | fputs(line_prefix, file); | |
3769 | show_rename_copy(file, "copy", p, line_prefix); | |
3770 | break; | |
3771 | case DIFF_STATUS_RENAMED: | |
3772 | fputs(line_prefix, file); | |
3773 | show_rename_copy(file, "rename", p, line_prefix); | |
3774 | break; | |
3775 | default: | |
3776 | if (p->score) { | |
3777 | fprintf(file, "%s rewrite ", line_prefix); | |
3778 | write_name_quoted(p->two->path, file, ' '); | |
3779 | fprintf(file, "(%d%%)\n", similarity_index(p)); | |
3780 | } | |
3781 | show_mode_change(file, p, !p->score, line_prefix); | |
3782 | break; | |
3783 | } | |
3784 | } | |
3785 | ||
3786 | struct patch_id_t { | |
3787 | git_SHA_CTX *ctx; | |
3788 | int patchlen; | |
3789 | }; | |
3790 | ||
3791 | static int remove_space(char *line, int len) | |
3792 | { | |
3793 | int i; | |
3794 | char *dst = line; | |
3795 | unsigned char c; | |
3796 | ||
3797 | for (i = 0; i < len; i++) | |
3798 | if (!isspace((c = line[i]))) | |
3799 | *dst++ = c; | |
3800 | ||
3801 | return dst - line; | |
3802 | } | |
3803 | ||
3804 | static void patch_id_consume(void *priv, char *line, unsigned long len) | |
3805 | { | |
3806 | struct patch_id_t *data = priv; | |
3807 | int new_len; | |
3808 | ||
3809 | /* Ignore line numbers when computing the SHA1 of the patch */ | |
3810 | if (!prefixcmp(line, "@@ -")) | |
3811 | return; | |
3812 | ||
3813 | new_len = remove_space(line, len); | |
3814 | ||
3815 | git_SHA1_Update(data->ctx, line, new_len); | |
3816 | data->patchlen += new_len; | |
3817 | } | |
3818 | ||
3819 | /* returns 0 upon success, and writes result into sha1 */ | |
3820 | static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1) | |
3821 | { | |
3822 | struct diff_queue_struct *q = &diff_queued_diff; | |
3823 | int i; | |
3824 | git_SHA_CTX ctx; | |
3825 | struct patch_id_t data; | |
3826 | char buffer[PATH_MAX * 4 + 20]; | |
3827 | ||
3828 | git_SHA1_Init(&ctx); | |
3829 | memset(&data, 0, sizeof(struct patch_id_t)); | |
3830 | data.ctx = &ctx; | |
3831 | ||
3832 | for (i = 0; i < q->nr; i++) { | |
3833 | xpparam_t xpp; | |
3834 | xdemitconf_t xecfg; | |
3835 | mmfile_t mf1, mf2; | |
3836 | struct diff_filepair *p = q->queue[i]; | |
3837 | int len1, len2; | |
3838 | ||
3839 | memset(&xpp, 0, sizeof(xpp)); | |
3840 | memset(&xecfg, 0, sizeof(xecfg)); | |
3841 | if (p->status == 0) | |
3842 | return error("internal diff status error"); | |
3843 | if (p->status == DIFF_STATUS_UNKNOWN) | |
3844 | continue; | |
3845 | if (diff_unmodified_pair(p)) | |
3846 | continue; | |
3847 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
3848 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
3849 | continue; | |
3850 | if (DIFF_PAIR_UNMERGED(p)) | |
3851 | continue; | |
3852 | ||
3853 | diff_fill_sha1_info(p->one); | |
3854 | diff_fill_sha1_info(p->two); | |
3855 | if (fill_mmfile(&mf1, p->one) < 0 || | |
3856 | fill_mmfile(&mf2, p->two) < 0) | |
3857 | return error("unable to read files to diff"); | |
3858 | ||
3859 | len1 = remove_space(p->one->path, strlen(p->one->path)); | |
3860 | len2 = remove_space(p->two->path, strlen(p->two->path)); | |
3861 | if (p->one->mode == 0) | |
3862 | len1 = snprintf(buffer, sizeof(buffer), | |
3863 | "diff--gita/%.*sb/%.*s" | |
3864 | "newfilemode%06o" | |
3865 | "---/dev/null" | |
3866 | "+++b/%.*s", | |
3867 | len1, p->one->path, | |
3868 | len2, p->two->path, | |
3869 | p->two->mode, | |
3870 | len2, p->two->path); | |
3871 | else if (p->two->mode == 0) | |
3872 | len1 = snprintf(buffer, sizeof(buffer), | |
3873 | "diff--gita/%.*sb/%.*s" | |
3874 | "deletedfilemode%06o" | |
3875 | "---a/%.*s" | |
3876 | "+++/dev/null", | |
3877 | len1, p->one->path, | |
3878 | len2, p->two->path, | |
3879 | p->one->mode, | |
3880 | len1, p->one->path); | |
3881 | else | |
3882 | len1 = snprintf(buffer, sizeof(buffer), | |
3883 | "diff--gita/%.*sb/%.*s" | |
3884 | "---a/%.*s" | |
3885 | "+++b/%.*s", | |
3886 | len1, p->one->path, | |
3887 | len2, p->two->path, | |
3888 | len1, p->one->path, | |
3889 | len2, p->two->path); | |
3890 | git_SHA1_Update(&ctx, buffer, len1); | |
3891 | ||
3892 | if (diff_filespec_is_binary(p->one) || | |
3893 | diff_filespec_is_binary(p->two)) { | |
3894 | git_SHA1_Update(&ctx, sha1_to_hex(p->one->sha1), 40); | |
3895 | git_SHA1_Update(&ctx, sha1_to_hex(p->two->sha1), 40); | |
3896 | continue; | |
3897 | } | |
3898 | ||
3899 | xpp.flags = 0; | |
3900 | xecfg.ctxlen = 3; | |
3901 | xecfg.flags = 0; | |
3902 | xdi_diff_outf(&mf1, &mf2, patch_id_consume, &data, | |
3903 | &xpp, &xecfg); | |
3904 | } | |
3905 | ||
3906 | git_SHA1_Final(sha1, &ctx); | |
3907 | return 0; | |
3908 | } | |
3909 | ||
3910 | int diff_flush_patch_id(struct diff_options *options, unsigned char *sha1) | |
3911 | { | |
3912 | struct diff_queue_struct *q = &diff_queued_diff; | |
3913 | int i; | |
3914 | int result = diff_get_patch_id(options, sha1); | |
3915 | ||
3916 | for (i = 0; i < q->nr; i++) | |
3917 | diff_free_filepair(q->queue[i]); | |
3918 | ||
3919 | free(q->queue); | |
3920 | DIFF_QUEUE_CLEAR(q); | |
3921 | ||
3922 | return result; | |
3923 | } | |
3924 | ||
3925 | static int is_summary_empty(const struct diff_queue_struct *q) | |
3926 | { | |
3927 | int i; | |
3928 | ||
3929 | for (i = 0; i < q->nr; i++) { | |
3930 | const struct diff_filepair *p = q->queue[i]; | |
3931 | ||
3932 | switch (p->status) { | |
3933 | case DIFF_STATUS_DELETED: | |
3934 | case DIFF_STATUS_ADDED: | |
3935 | case DIFF_STATUS_COPIED: | |
3936 | case DIFF_STATUS_RENAMED: | |
3937 | return 0; | |
3938 | default: | |
3939 | if (p->score) | |
3940 | return 0; | |
3941 | if (p->one->mode && p->two->mode && | |
3942 | p->one->mode != p->two->mode) | |
3943 | return 0; | |
3944 | break; | |
3945 | } | |
3946 | } | |
3947 | return 1; | |
3948 | } | |
3949 | ||
3950 | void diff_flush(struct diff_options *options) | |
3951 | { | |
3952 | struct diff_queue_struct *q = &diff_queued_diff; | |
3953 | int i, output_format = options->output_format; | |
3954 | int separator = 0; | |
3955 | ||
3956 | /* | |
3957 | * Order: raw, stat, summary, patch | |
3958 | * or: name/name-status/checkdiff (other bits clear) | |
3959 | */ | |
3960 | if (!q->nr) | |
3961 | goto free_queue; | |
3962 | ||
3963 | if (output_format & (DIFF_FORMAT_RAW | | |
3964 | DIFF_FORMAT_NAME | | |
3965 | DIFF_FORMAT_NAME_STATUS | | |
3966 | DIFF_FORMAT_CHECKDIFF)) { | |
3967 | for (i = 0; i < q->nr; i++) { | |
3968 | struct diff_filepair *p = q->queue[i]; | |
3969 | if (check_pair_status(p)) | |
3970 | flush_one_pair(p, options); | |
3971 | } | |
3972 | separator++; | |
3973 | } | |
3974 | ||
3975 | if (output_format & (DIFF_FORMAT_DIFFSTAT|DIFF_FORMAT_SHORTSTAT|DIFF_FORMAT_NUMSTAT)) { | |
3976 | struct diffstat_t diffstat; | |
3977 | ||
3978 | memset(&diffstat, 0, sizeof(struct diffstat_t)); | |
3979 | for (i = 0; i < q->nr; i++) { | |
3980 | struct diff_filepair *p = q->queue[i]; | |
3981 | if (check_pair_status(p)) | |
3982 | diff_flush_stat(p, options, &diffstat); | |
3983 | } | |
3984 | if (output_format & DIFF_FORMAT_NUMSTAT) | |
3985 | show_numstat(&diffstat, options); | |
3986 | if (output_format & DIFF_FORMAT_DIFFSTAT) | |
3987 | show_stats(&diffstat, options); | |
3988 | if (output_format & DIFF_FORMAT_SHORTSTAT) | |
3989 | show_shortstats(&diffstat, options); | |
3990 | free_diffstat_info(&diffstat); | |
3991 | separator++; | |
3992 | } | |
3993 | if (output_format & DIFF_FORMAT_DIRSTAT) | |
3994 | show_dirstat(options); | |
3995 | ||
3996 | if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) { | |
3997 | for (i = 0; i < q->nr; i++) { | |
3998 | diff_summary(options, q->queue[i]); | |
3999 | } | |
4000 | separator++; | |
4001 | } | |
4002 | ||
4003 | if (output_format & DIFF_FORMAT_NO_OUTPUT && | |
4004 | DIFF_OPT_TST(options, EXIT_WITH_STATUS) && | |
4005 | DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) { | |
4006 | /* | |
4007 | * run diff_flush_patch for the exit status. setting | |
4008 | * options->file to /dev/null should be safe, becaue we | |
4009 | * aren't supposed to produce any output anyway. | |
4010 | */ | |
4011 | if (options->close_file) | |
4012 | fclose(options->file); | |
4013 | options->file = fopen("/dev/null", "w"); | |
4014 | if (!options->file) | |
4015 | die_errno("Could not open /dev/null"); | |
4016 | options->close_file = 1; | |
4017 | for (i = 0; i < q->nr; i++) { | |
4018 | struct diff_filepair *p = q->queue[i]; | |
4019 | if (check_pair_status(p)) | |
4020 | diff_flush_patch(p, options); | |
4021 | if (options->found_changes) | |
4022 | break; | |
4023 | } | |
4024 | } | |
4025 | ||
4026 | if (output_format & DIFF_FORMAT_PATCH) { | |
4027 | if (separator) { | |
4028 | putc(options->line_termination, options->file); | |
4029 | if (options->stat_sep) { | |
4030 | /* attach patch instead of inline */ | |
4031 | fputs(options->stat_sep, options->file); | |
4032 | } | |
4033 | } | |
4034 | ||
4035 | for (i = 0; i < q->nr; i++) { | |
4036 | struct diff_filepair *p = q->queue[i]; | |
4037 | if (check_pair_status(p)) | |
4038 | diff_flush_patch(p, options); | |
4039 | } | |
4040 | } | |
4041 | ||
4042 | if (output_format & DIFF_FORMAT_CALLBACK) | |
4043 | options->format_callback(q, options, options->format_callback_data); | |
4044 | ||
4045 | for (i = 0; i < q->nr; i++) | |
4046 | diff_free_filepair(q->queue[i]); | |
4047 | free_queue: | |
4048 | free(q->queue); | |
4049 | DIFF_QUEUE_CLEAR(q); | |
4050 | if (options->close_file) | |
4051 | fclose(options->file); | |
4052 | ||
4053 | /* | |
4054 | * Report the content-level differences with HAS_CHANGES; | |
4055 | * diff_addremove/diff_change does not set the bit when | |
4056 | * DIFF_FROM_CONTENTS is in effect (e.g. with -w). | |
4057 | */ | |
4058 | if (DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) { | |
4059 | if (options->found_changes) | |
4060 | DIFF_OPT_SET(options, HAS_CHANGES); | |
4061 | else | |
4062 | DIFF_OPT_CLR(options, HAS_CHANGES); | |
4063 | } | |
4064 | } | |
4065 | ||
4066 | static void diffcore_apply_filter(const char *filter) | |
4067 | { | |
4068 | int i; | |
4069 | struct diff_queue_struct *q = &diff_queued_diff; | |
4070 | struct diff_queue_struct outq; | |
4071 | DIFF_QUEUE_CLEAR(&outq); | |
4072 | ||
4073 | if (!filter) | |
4074 | return; | |
4075 | ||
4076 | if (strchr(filter, DIFF_STATUS_FILTER_AON)) { | |
4077 | int found; | |
4078 | for (i = found = 0; !found && i < q->nr; i++) { | |
4079 | struct diff_filepair *p = q->queue[i]; | |
4080 | if (((p->status == DIFF_STATUS_MODIFIED) && | |
4081 | ((p->score && | |
4082 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
4083 | (!p->score && | |
4084 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
4085 | ((p->status != DIFF_STATUS_MODIFIED) && | |
4086 | strchr(filter, p->status))) | |
4087 | found++; | |
4088 | } | |
4089 | if (found) | |
4090 | return; | |
4091 | ||
4092 | /* otherwise we will clear the whole queue | |
4093 | * by copying the empty outq at the end of this | |
4094 | * function, but first clear the current entries | |
4095 | * in the queue. | |
4096 | */ | |
4097 | for (i = 0; i < q->nr; i++) | |
4098 | diff_free_filepair(q->queue[i]); | |
4099 | } | |
4100 | else { | |
4101 | /* Only the matching ones */ | |
4102 | for (i = 0; i < q->nr; i++) { | |
4103 | struct diff_filepair *p = q->queue[i]; | |
4104 | ||
4105 | if (((p->status == DIFF_STATUS_MODIFIED) && | |
4106 | ((p->score && | |
4107 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
4108 | (!p->score && | |
4109 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
4110 | ((p->status != DIFF_STATUS_MODIFIED) && | |
4111 | strchr(filter, p->status))) | |
4112 | diff_q(&outq, p); | |
4113 | else | |
4114 | diff_free_filepair(p); | |
4115 | } | |
4116 | } | |
4117 | free(q->queue); | |
4118 | *q = outq; | |
4119 | } | |
4120 | ||
4121 | /* Check whether two filespecs with the same mode and size are identical */ | |
4122 | static int diff_filespec_is_identical(struct diff_filespec *one, | |
4123 | struct diff_filespec *two) | |
4124 | { | |
4125 | if (S_ISGITLINK(one->mode)) | |
4126 | return 0; | |
4127 | if (diff_populate_filespec(one, 0)) | |
4128 | return 0; | |
4129 | if (diff_populate_filespec(two, 0)) | |
4130 | return 0; | |
4131 | return !memcmp(one->data, two->data, one->size); | |
4132 | } | |
4133 | ||
4134 | static void diffcore_skip_stat_unmatch(struct diff_options *diffopt) | |
4135 | { | |
4136 | int i; | |
4137 | struct diff_queue_struct *q = &diff_queued_diff; | |
4138 | struct diff_queue_struct outq; | |
4139 | DIFF_QUEUE_CLEAR(&outq); | |
4140 | ||
4141 | for (i = 0; i < q->nr; i++) { | |
4142 | struct diff_filepair *p = q->queue[i]; | |
4143 | ||
4144 | /* | |
4145 | * 1. Entries that come from stat info dirtiness | |
4146 | * always have both sides (iow, not create/delete), | |
4147 | * one side of the object name is unknown, with | |
4148 | * the same mode and size. Keep the ones that | |
4149 | * do not match these criteria. They have real | |
4150 | * differences. | |
4151 | * | |
4152 | * 2. At this point, the file is known to be modified, | |
4153 | * with the same mode and size, and the object | |
4154 | * name of one side is unknown. Need to inspect | |
4155 | * the identical contents. | |
4156 | */ | |
4157 | if (!DIFF_FILE_VALID(p->one) || /* (1) */ | |
4158 | !DIFF_FILE_VALID(p->two) || | |
4159 | (p->one->sha1_valid && p->two->sha1_valid) || | |
4160 | (p->one->mode != p->two->mode) || | |
4161 | diff_populate_filespec(p->one, 1) || | |
4162 | diff_populate_filespec(p->two, 1) || | |
4163 | (p->one->size != p->two->size) || | |
4164 | !diff_filespec_is_identical(p->one, p->two)) /* (2) */ | |
4165 | diff_q(&outq, p); | |
4166 | else { | |
4167 | /* | |
4168 | * The caller can subtract 1 from skip_stat_unmatch | |
4169 | * to determine how many paths were dirty only | |
4170 | * due to stat info mismatch. | |
4171 | */ | |
4172 | if (!DIFF_OPT_TST(diffopt, NO_INDEX)) | |
4173 | diffopt->skip_stat_unmatch++; | |
4174 | diff_free_filepair(p); | |
4175 | } | |
4176 | } | |
4177 | free(q->queue); | |
4178 | *q = outq; | |
4179 | } | |
4180 | ||
4181 | static int diffnamecmp(const void *a_, const void *b_) | |
4182 | { | |
4183 | const struct diff_filepair *a = *((const struct diff_filepair **)a_); | |
4184 | const struct diff_filepair *b = *((const struct diff_filepair **)b_); | |
4185 | const char *name_a, *name_b; | |
4186 | ||
4187 | name_a = a->one ? a->one->path : a->two->path; | |
4188 | name_b = b->one ? b->one->path : b->two->path; | |
4189 | return strcmp(name_a, name_b); | |
4190 | } | |
4191 | ||
4192 | void diffcore_fix_diff_index(struct diff_options *options) | |
4193 | { | |
4194 | struct diff_queue_struct *q = &diff_queued_diff; | |
4195 | qsort(q->queue, q->nr, sizeof(q->queue[0]), diffnamecmp); | |
4196 | } | |
4197 | ||
4198 | void diffcore_std(struct diff_options *options) | |
4199 | { | |
4200 | if (options->skip_stat_unmatch) | |
4201 | diffcore_skip_stat_unmatch(options); | |
4202 | if (!options->found_follow) { | |
4203 | /* See try_to_follow_renames() in tree-diff.c */ | |
4204 | if (options->break_opt != -1) | |
4205 | diffcore_break(options->break_opt); | |
4206 | if (options->detect_rename) | |
4207 | diffcore_rename(options); | |
4208 | if (options->break_opt != -1) | |
4209 | diffcore_merge_broken(); | |
4210 | } | |
4211 | if (options->pickaxe) | |
4212 | diffcore_pickaxe(options); | |
4213 | if (options->orderfile) | |
4214 | diffcore_order(options->orderfile); | |
4215 | if (!options->found_follow) | |
4216 | /* See try_to_follow_renames() in tree-diff.c */ | |
4217 | diff_resolve_rename_copy(); | |
4218 | diffcore_apply_filter(options->filter); | |
4219 | ||
4220 | if (diff_queued_diff.nr && !DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) | |
4221 | DIFF_OPT_SET(options, HAS_CHANGES); | |
4222 | else | |
4223 | DIFF_OPT_CLR(options, HAS_CHANGES); | |
4224 | ||
4225 | options->found_follow = 0; | |
4226 | } | |
4227 | ||
4228 | int diff_result_code(struct diff_options *opt, int status) | |
4229 | { | |
4230 | int result = 0; | |
4231 | if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && | |
4232 | !(opt->output_format & DIFF_FORMAT_CHECKDIFF)) | |
4233 | return status; | |
4234 | if (DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && | |
4235 | DIFF_OPT_TST(opt, HAS_CHANGES)) | |
4236 | result |= 01; | |
4237 | if ((opt->output_format & DIFF_FORMAT_CHECKDIFF) && | |
4238 | DIFF_OPT_TST(opt, CHECK_FAILED)) | |
4239 | result |= 02; | |
4240 | return result; | |
4241 | } | |
4242 | ||
4243 | /* | |
4244 | * Shall changes to this submodule be ignored? | |
4245 | * | |
4246 | * Submodule changes can be configured to be ignored separately for each path, | |
4247 | * but that configuration can be overridden from the command line. | |
4248 | */ | |
4249 | static int is_submodule_ignored(const char *path, struct diff_options *options) | |
4250 | { | |
4251 | int ignored = 0; | |
4252 | unsigned orig_flags = options->flags; | |
4253 | if (!DIFF_OPT_TST(options, OVERRIDE_SUBMODULE_CONFIG)) | |
4254 | set_diffopt_flags_from_submodule_config(options, path); | |
4255 | if (DIFF_OPT_TST(options, IGNORE_SUBMODULES)) | |
4256 | ignored = 1; | |
4257 | options->flags = orig_flags; | |
4258 | return ignored; | |
4259 | } | |
4260 | ||
4261 | void diff_addremove(struct diff_options *options, | |
4262 | int addremove, unsigned mode, | |
4263 | const unsigned char *sha1, | |
4264 | const char *concatpath, unsigned dirty_submodule) | |
4265 | { | |
4266 | struct diff_filespec *one, *two; | |
4267 | ||
4268 | if (S_ISGITLINK(mode) && is_submodule_ignored(concatpath, options)) | |
4269 | return; | |
4270 | ||
4271 | /* This may look odd, but it is a preparation for | |
4272 | * feeding "there are unchanged files which should | |
4273 | * not produce diffs, but when you are doing copy | |
4274 | * detection you would need them, so here they are" | |
4275 | * entries to the diff-core. They will be prefixed | |
4276 | * with something like '=' or '*' (I haven't decided | |
4277 | * which but should not make any difference). | |
4278 | * Feeding the same new and old to diff_change() | |
4279 | * also has the same effect. | |
4280 | * Before the final output happens, they are pruned after | |
4281 | * merged into rename/copy pairs as appropriate. | |
4282 | */ | |
4283 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) | |
4284 | addremove = (addremove == '+' ? '-' : | |
4285 | addremove == '-' ? '+' : addremove); | |
4286 | ||
4287 | if (options->prefix && | |
4288 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
4289 | return; | |
4290 | ||
4291 | one = alloc_filespec(concatpath); | |
4292 | two = alloc_filespec(concatpath); | |
4293 | ||
4294 | if (addremove != '+') | |
4295 | fill_filespec(one, sha1, mode); | |
4296 | if (addremove != '-') { | |
4297 | fill_filespec(two, sha1, mode); | |
4298 | two->dirty_submodule = dirty_submodule; | |
4299 | } | |
4300 | ||
4301 | diff_queue(&diff_queued_diff, one, two); | |
4302 | if (!DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) | |
4303 | DIFF_OPT_SET(options, HAS_CHANGES); | |
4304 | } | |
4305 | ||
4306 | void diff_change(struct diff_options *options, | |
4307 | unsigned old_mode, unsigned new_mode, | |
4308 | const unsigned char *old_sha1, | |
4309 | const unsigned char *new_sha1, | |
4310 | const char *concatpath, | |
4311 | unsigned old_dirty_submodule, unsigned new_dirty_submodule) | |
4312 | { | |
4313 | struct diff_filespec *one, *two; | |
4314 | ||
4315 | if (S_ISGITLINK(old_mode) && S_ISGITLINK(new_mode) && | |
4316 | is_submodule_ignored(concatpath, options)) | |
4317 | return; | |
4318 | ||
4319 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) { | |
4320 | unsigned tmp; | |
4321 | const unsigned char *tmp_c; | |
4322 | tmp = old_mode; old_mode = new_mode; new_mode = tmp; | |
4323 | tmp_c = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_c; | |
4324 | tmp = old_dirty_submodule; old_dirty_submodule = new_dirty_submodule; | |
4325 | new_dirty_submodule = tmp; | |
4326 | } | |
4327 | ||
4328 | if (options->prefix && | |
4329 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
4330 | return; | |
4331 | ||
4332 | one = alloc_filespec(concatpath); | |
4333 | two = alloc_filespec(concatpath); | |
4334 | fill_filespec(one, old_sha1, old_mode); | |
4335 | fill_filespec(two, new_sha1, new_mode); | |
4336 | one->dirty_submodule = old_dirty_submodule; | |
4337 | two->dirty_submodule = new_dirty_submodule; | |
4338 | ||
4339 | diff_queue(&diff_queued_diff, one, two); | |
4340 | if (!DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) | |
4341 | DIFF_OPT_SET(options, HAS_CHANGES); | |
4342 | } | |
4343 | ||
4344 | void diff_unmerge(struct diff_options *options, | |
4345 | const char *path, | |
4346 | unsigned mode, const unsigned char *sha1) | |
4347 | { | |
4348 | struct diff_filespec *one, *two; | |
4349 | ||
4350 | if (options->prefix && | |
4351 | strncmp(path, options->prefix, options->prefix_length)) | |
4352 | return; | |
4353 | ||
4354 | one = alloc_filespec(path); | |
4355 | two = alloc_filespec(path); | |
4356 | fill_filespec(one, sha1, mode); | |
4357 | diff_queue(&diff_queued_diff, one, two)->is_unmerged = 1; | |
4358 | } | |
4359 | ||
4360 | static char *run_textconv(const char *pgm, struct diff_filespec *spec, | |
4361 | size_t *outsize) | |
4362 | { | |
4363 | struct diff_tempfile *temp; | |
4364 | const char *argv[3]; | |
4365 | const char **arg = argv; | |
4366 | struct child_process child; | |
4367 | struct strbuf buf = STRBUF_INIT; | |
4368 | int err = 0; | |
4369 | ||
4370 | temp = prepare_temp_file(spec->path, spec); | |
4371 | *arg++ = pgm; | |
4372 | *arg++ = temp->name; | |
4373 | *arg = NULL; | |
4374 | ||
4375 | memset(&child, 0, sizeof(child)); | |
4376 | child.use_shell = 1; | |
4377 | child.argv = argv; | |
4378 | child.out = -1; | |
4379 | if (start_command(&child)) { | |
4380 | remove_tempfile(); | |
4381 | return NULL; | |
4382 | } | |
4383 | ||
4384 | if (strbuf_read(&buf, child.out, 0) < 0) | |
4385 | err = error("error reading from textconv command '%s'", pgm); | |
4386 | close(child.out); | |
4387 | ||
4388 | if (finish_command(&child) || err) { | |
4389 | strbuf_release(&buf); | |
4390 | remove_tempfile(); | |
4391 | return NULL; | |
4392 | } | |
4393 | remove_tempfile(); | |
4394 | ||
4395 | return strbuf_detach(&buf, outsize); | |
4396 | } | |
4397 | ||
4398 | size_t fill_textconv(struct userdiff_driver *driver, | |
4399 | struct diff_filespec *df, | |
4400 | char **outbuf) | |
4401 | { | |
4402 | size_t size; | |
4403 | ||
4404 | if (!driver || !driver->textconv) { | |
4405 | if (!DIFF_FILE_VALID(df)) { | |
4406 | *outbuf = ""; | |
4407 | return 0; | |
4408 | } | |
4409 | if (diff_populate_filespec(df, 0)) | |
4410 | die("unable to read files to diff"); | |
4411 | *outbuf = df->data; | |
4412 | return df->size; | |
4413 | } | |
4414 | ||
4415 | if (driver->textconv_cache && df->sha1_valid) { | |
4416 | *outbuf = notes_cache_get(driver->textconv_cache, df->sha1, | |
4417 | &size); | |
4418 | if (*outbuf) | |
4419 | return size; | |
4420 | } | |
4421 | ||
4422 | *outbuf = run_textconv(driver->textconv, df, &size); | |
4423 | if (!*outbuf) | |
4424 | die("unable to read files to diff"); | |
4425 | ||
4426 | if (driver->textconv_cache && df->sha1_valid) { | |
4427 | /* ignore errors, as we might be in a readonly repository */ | |
4428 | notes_cache_put(driver->textconv_cache, df->sha1, *outbuf, | |
4429 | size); | |
4430 | /* | |
4431 | * we could save up changes and flush them all at the end, | |
4432 | * but we would need an extra call after all diffing is done. | |
4433 | * Since generating a cache entry is the slow path anyway, | |
4434 | * this extra overhead probably isn't a big deal. | |
4435 | */ | |
4436 | notes_cache_write(driver->textconv_cache); | |
4437 | } | |
4438 | ||
4439 | return size; | |
4440 | } |