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Commit | Line | Data |
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6973dcae JH |
1 | /* |
2 | * Copyright (C) 2005 Junio C Hamano | |
3 | */ | |
6973dcae JH |
4 | #include "cache.h" |
5 | #include "quote.h" | |
6 | #include "diff.h" | |
7 | #include "diffcore.h" | |
051308f6 | 8 | #include "delta.h" |
6973dcae | 9 | #include "xdiff-interface.h" |
7c92fe0e | 10 | #include "color.h" |
8c701249 | 11 | #include "attr.h" |
d5535ec7 | 12 | #include "run-command.h" |
23707811 | 13 | #include "utf8.h" |
be58e70d | 14 | #include "userdiff.h" |
4a16d072 | 15 | #include "sigchain.h" |
752c0c24 | 16 | #include "submodule.h" |
a757c646 | 17 | #include "ll-merge.h" |
6973dcae | 18 | |
1510fea7 SP |
19 | #ifdef NO_FAST_WORKING_DIRECTORY |
20 | #define FAST_WORKING_DIRECTORY 0 | |
21 | #else | |
22 | #define FAST_WORKING_DIRECTORY 1 | |
23 | #endif | |
24 | ||
96f1e58f | 25 | static int diff_detect_rename_default; |
92c57e5c | 26 | static int diff_rename_limit_default = 400; |
a624eaa7 | 27 | static int diff_suppress_blank_empty; |
6b2f2d98 | 28 | int diff_use_color_default = -1; |
98a4d87b | 29 | static const char *diff_word_regex_cfg; |
cbe02100 | 30 | static const char *external_diff_cmd_cfg; |
aecbf914 | 31 | int diff_auto_refresh_index = 1; |
a5a818ee | 32 | static int diff_mnemonic_prefix; |
f89504dd | 33 | static int diff_no_prefix; |
be4f2b40 | 34 | static struct diff_options default_diff_options; |
6973dcae | 35 | |
7c92fe0e | 36 | static char diff_colors[][COLOR_MAXLEN] = { |
dc6ebd4c AL |
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 */ | |
89cb73a1 | 45 | GIT_COLOR_NORMAL, /* FUNCINFO */ |
cd112cef JS |
46 | }; |
47 | ||
801235c5 JH |
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; | |
ce436973 JK |
60 | if (!strcasecmp(var+ofs, "commit")) |
61 | return DIFF_COMMIT; | |
448c3ef1 JH |
62 | if (!strcasecmp(var+ofs, "whitespace")) |
63 | return DIFF_WHITESPACE; | |
89cb73a1 BW |
64 | if (!strcasecmp(var+ofs, "func")) |
65 | return DIFF_FUNCINFO; | |
8b8e8624 | 66 | return -1; |
801235c5 JH |
67 | } |
68 | ||
cced5fbc LT |
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 | ||
83ad63cf JH |
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 | */ | |
ef90d6d4 | 84 | int git_diff_ui_config(const char *var, const char *value, void *cb) |
801235c5 | 85 | { |
a159ca0c | 86 | if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) { |
0f6f5a40 | 87 | diff_use_color_default = git_config_colorbool(var, value, -1); |
801235c5 JH |
88 | return 0; |
89 | } | |
b68ea12e | 90 | if (!strcmp(var, "diff.renames")) { |
cced5fbc | 91 | diff_detect_rename_default = git_config_rename(var, value); |
b68ea12e EW |
92 | return 0; |
93 | } | |
aecbf914 JH |
94 | if (!strcmp(var, "diff.autorefreshindex")) { |
95 | diff_auto_refresh_index = git_config_bool(var, value); | |
96 | return 0; | |
97 | } | |
a5a818ee JH |
98 | if (!strcmp(var, "diff.mnemonicprefix")) { |
99 | diff_mnemonic_prefix = git_config_bool(var, value); | |
100 | return 0; | |
101 | } | |
f89504dd EC |
102 | if (!strcmp(var, "diff.noprefix")) { |
103 | diff_no_prefix = git_config_bool(var, value); | |
104 | return 0; | |
105 | } | |
daec808c BH |
106 | if (!strcmp(var, "diff.external")) |
107 | return git_config_string(&external_diff_cmd_cfg, var, value); | |
98a4d87b BSSJ |
108 | if (!strcmp(var, "diff.wordregex")) |
109 | return git_config_string(&diff_word_regex_cfg, var, value); | |
f1af60bd | 110 | |
be4f2b40 JS |
111 | if (!strcmp(var, "diff.ignoresubmodules")) |
112 | handle_ignore_submodules_arg(&default_diff_options, value); | |
113 | ||
ef90d6d4 | 114 | return git_diff_basic_config(var, value, cb); |
9a1805a8 JK |
115 | } |
116 | ||
ef90d6d4 | 117 | int git_diff_basic_config(const char *var, const char *value, void *cb) |
9a1805a8 | 118 | { |
2b6ca6df LT |
119 | if (!strcmp(var, "diff.renamelimit")) { |
120 | diff_rename_limit_default = git_config_int(var, value); | |
121 | return 0; | |
122 | } | |
123 | ||
c7534ef4 JK |
124 | switch (userdiff_config(var, value)) { |
125 | case 0: break; | |
126 | case -1: return -1; | |
127 | default: return 0; | |
128 | } | |
129 | ||
1968d77d | 130 | if (!prefixcmp(var, "diff.color.") || !prefixcmp(var, "color.diff.")) { |
801235c5 | 131 | int slot = parse_diff_color_slot(var, 11); |
8b8e8624 JK |
132 | if (slot < 0) |
133 | return 0; | |
64f30e94 JH |
134 | if (!value) |
135 | return config_error_nonbool(var); | |
7c92fe0e | 136 | color_parse(value, var, diff_colors[slot]); |
801235c5 JH |
137 | return 0; |
138 | } | |
f1af60bd | 139 | |
a624eaa7 | 140 | /* like GNU diff's --suppress-blank-empty option */ |
950db879 JS |
141 | if (!strcmp(var, "diff.suppressblankempty") || |
142 | /* for backwards compatibility */ | |
143 | !strcmp(var, "diff.suppress-blank-empty")) { | |
a624eaa7 JM |
144 | diff_suppress_blank_empty = git_config_bool(var, value); |
145 | return 0; | |
146 | } | |
147 | ||
aee9c7d6 JL |
148 | if (!prefixcmp(var, "submodule.")) |
149 | return parse_submodule_config_option(var, value); | |
150 | ||
ef90d6d4 | 151 | return git_color_default_config(var, value, cb); |
801235c5 JH |
152 | } |
153 | ||
6973dcae JH |
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); | |
f285a2d7 | 158 | struct strbuf res = STRBUF_INIT; |
6973dcae JH |
159 | |
160 | if (need_one + need_two) { | |
663af342 PH |
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); | |
6973dcae | 168 | } |
b315c5c0 | 169 | return strbuf_detach(&res, NULL); |
6973dcae JH |
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"); | |
cbe02100 JS |
180 | if (!external_diff_cmd) |
181 | external_diff_cmd = external_diff_cmd_cfg; | |
6973dcae JH |
182 | done_preparing = 1; |
183 | return external_diff_cmd; | |
184 | } | |
185 | ||
6973dcae JH |
186 | static struct diff_tempfile { |
187 | const char *name; /* filename external diff should read from */ | |
188 | char hex[41]; | |
189 | char mode[10]; | |
1472966c | 190 | char tmp_path[PATH_MAX]; |
6973dcae JH |
191 | } diff_temp[2]; |
192 | ||
6957eb9a JH |
193 | typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len); |
194 | ||
195 | struct emit_callback { | |
6957eb9a JH |
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; | |
a3c158d4 | 205 | struct diff_options *opt; |
6957eb9a | 206 | int *found_changesp; |
3e97c7c6 | 207 | struct strbuf *header; |
6957eb9a JH |
208 | }; |
209 | ||
6973dcae JH |
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 | ||
6957eb9a JH |
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; | |
bb35fefb | 242 | |
6957eb9a JH |
243 | mf->ptr = one->data; |
244 | mf->size = one->size; | |
245 | return 0; | |
246 | } | |
247 | ||
abb371a1 JK |
248 | /* like fill_mmfile, but only for size, so we can avoid retrieving blob */ |
249 | static unsigned long diff_filespec_size(struct diff_filespec *one) | |
250 | { | |
251 | if (!DIFF_FILE_VALID(one)) | |
252 | return 0; | |
253 | diff_populate_filespec(one, 1); | |
254 | return one->size; | |
255 | } | |
256 | ||
6957eb9a JH |
257 | static int count_trailing_blank(mmfile_t *mf, unsigned ws_rule) |
258 | { | |
259 | char *ptr = mf->ptr; | |
260 | long size = mf->size; | |
261 | int cnt = 0; | |
262 | ||
263 | if (!size) | |
264 | return cnt; | |
265 | ptr += size - 1; /* pointing at the very end */ | |
266 | if (*ptr != '\n') | |
267 | ; /* incomplete line */ | |
268 | else | |
269 | ptr--; /* skip the last LF */ | |
270 | while (mf->ptr < ptr) { | |
271 | char *prev_eol; | |
272 | for (prev_eol = ptr; mf->ptr <= prev_eol; prev_eol--) | |
273 | if (*prev_eol == '\n') | |
274 | break; | |
275 | if (!ws_blank_line(prev_eol + 1, ptr - prev_eol, ws_rule)) | |
276 | break; | |
277 | cnt++; | |
278 | ptr = prev_eol - 1; | |
279 | } | |
280 | return cnt; | |
281 | } | |
282 | ||
283 | static void check_blank_at_eof(mmfile_t *mf1, mmfile_t *mf2, | |
284 | struct emit_callback *ecbdata) | |
285 | { | |
286 | int l1, l2, at; | |
287 | unsigned ws_rule = ecbdata->ws_rule; | |
288 | l1 = count_trailing_blank(mf1, ws_rule); | |
289 | l2 = count_trailing_blank(mf2, ws_rule); | |
290 | if (l2 <= l1) { | |
291 | ecbdata->blank_at_eof_in_preimage = 0; | |
292 | ecbdata->blank_at_eof_in_postimage = 0; | |
293 | return; | |
294 | } | |
295 | at = count_lines(mf1->ptr, mf1->size); | |
296 | ecbdata->blank_at_eof_in_preimage = (at - l1) + 1; | |
297 | ||
298 | at = count_lines(mf2->ptr, mf2->size); | |
299 | ecbdata->blank_at_eof_in_postimage = (at - l2) + 1; | |
300 | } | |
301 | ||
a3c158d4 | 302 | static void emit_line_0(struct diff_options *o, const char *set, const char *reset, |
250f7993 | 303 | int first, const char *line, int len) |
6957eb9a JH |
304 | { |
305 | int has_trailing_newline, has_trailing_carriage_return; | |
250f7993 | 306 | int nofirst; |
a3c158d4 BY |
307 | FILE *file = o->file; |
308 | ||
309 | if (o->output_prefix) { | |
310 | struct strbuf *msg = NULL; | |
311 | msg = o->output_prefix(o, o->output_prefix_data); | |
312 | assert(msg); | |
313 | fwrite(msg->buf, msg->len, 1, file); | |
314 | } | |
6957eb9a | 315 | |
250f7993 JH |
316 | if (len == 0) { |
317 | has_trailing_newline = (first == '\n'); | |
318 | has_trailing_carriage_return = (!has_trailing_newline && | |
319 | (first == '\r')); | |
320 | nofirst = has_trailing_newline || has_trailing_carriage_return; | |
321 | } else { | |
322 | has_trailing_newline = (len > 0 && line[len-1] == '\n'); | |
323 | if (has_trailing_newline) | |
324 | len--; | |
325 | has_trailing_carriage_return = (len > 0 && line[len-1] == '\r'); | |
326 | if (has_trailing_carriage_return) | |
327 | len--; | |
328 | nofirst = 0; | |
329 | } | |
6957eb9a | 330 | |
06a47552 JH |
331 | if (len || !nofirst) { |
332 | fputs(set, file); | |
333 | if (!nofirst) | |
334 | fputc(first, file); | |
335 | fwrite(line, len, 1, file); | |
336 | fputs(reset, file); | |
337 | } | |
6957eb9a JH |
338 | if (has_trailing_carriage_return) |
339 | fputc('\r', file); | |
340 | if (has_trailing_newline) | |
341 | fputc('\n', file); | |
342 | } | |
343 | ||
a3c158d4 | 344 | static void emit_line(struct diff_options *o, const char *set, const char *reset, |
250f7993 JH |
345 | const char *line, int len) |
346 | { | |
a3c158d4 | 347 | emit_line_0(o, set, reset, line[0], line+1, len-1); |
250f7993 JH |
348 | } |
349 | ||
6957eb9a JH |
350 | static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line, int len) |
351 | { | |
352 | if (!((ecbdata->ws_rule & WS_BLANK_AT_EOF) && | |
353 | ecbdata->blank_at_eof_in_preimage && | |
354 | ecbdata->blank_at_eof_in_postimage && | |
355 | ecbdata->blank_at_eof_in_preimage <= ecbdata->lno_in_preimage && | |
356 | ecbdata->blank_at_eof_in_postimage <= ecbdata->lno_in_postimage)) | |
357 | return 0; | |
018cff70 | 358 | return ws_blank_line(line, len, ecbdata->ws_rule); |
6957eb9a JH |
359 | } |
360 | ||
018cff70 JH |
361 | static void emit_add_line(const char *reset, |
362 | struct emit_callback *ecbdata, | |
363 | const char *line, int len) | |
6957eb9a JH |
364 | { |
365 | const char *ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE); | |
366 | const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_NEW); | |
367 | ||
368 | if (!*ws) | |
a3c158d4 | 369 | emit_line_0(ecbdata->opt, set, reset, '+', line, len); |
6957eb9a JH |
370 | else if (new_blank_line_at_eof(ecbdata, line, len)) |
371 | /* Blank line at EOF - paint '+' as well */ | |
a3c158d4 | 372 | emit_line_0(ecbdata->opt, ws, reset, '+', line, len); |
6957eb9a JH |
373 | else { |
374 | /* Emit just the prefix, then the rest. */ | |
a3c158d4 | 375 | emit_line_0(ecbdata->opt, set, reset, '+', "", 0); |
018cff70 | 376 | ws_check_emit(line, len, ecbdata->ws_rule, |
a3c158d4 | 377 | ecbdata->opt->file, set, reset, ws); |
6957eb9a JH |
378 | } |
379 | } | |
380 | ||
89cb73a1 BW |
381 | static void emit_hunk_header(struct emit_callback *ecbdata, |
382 | const char *line, int len) | |
383 | { | |
384 | const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN); | |
385 | const char *frag = diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO); | |
386 | const char *func = diff_get_color(ecbdata->color_diff, DIFF_FUNCINFO); | |
387 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); | |
388 | static const char atat[2] = { '@', '@' }; | |
389 | const char *cp, *ep; | |
2efcc977 BY |
390 | struct strbuf msgbuf = STRBUF_INIT; |
391 | int org_len = len; | |
392 | int i = 1; | |
89cb73a1 BW |
393 | |
394 | /* | |
395 | * As a hunk header must begin with "@@ -<old>, +<new> @@", | |
396 | * it always is at least 10 bytes long. | |
397 | */ | |
398 | if (len < 10 || | |
399 | memcmp(line, atat, 2) || | |
400 | !(ep = memmem(line + 2, len - 2, atat, 2))) { | |
a3c158d4 | 401 | emit_line(ecbdata->opt, plain, reset, line, len); |
89cb73a1 BW |
402 | return; |
403 | } | |
404 | ep += 2; /* skip over @@ */ | |
405 | ||
406 | /* The hunk header in fraginfo color */ | |
2efcc977 BY |
407 | strbuf_add(&msgbuf, frag, strlen(frag)); |
408 | strbuf_add(&msgbuf, line, ep - line); | |
409 | strbuf_add(&msgbuf, reset, strlen(reset)); | |
410 | ||
411 | /* | |
412 | * trailing "\r\n" | |
413 | */ | |
414 | for ( ; i < 3; i++) | |
415 | if (line[len - i] == '\r' || line[len - i] == '\n') | |
416 | len--; | |
89cb73a1 BW |
417 | |
418 | /* blank before the func header */ | |
419 | for (cp = ep; ep - line < len; ep++) | |
420 | if (*ep != ' ' && *ep != '\t') | |
421 | break; | |
2efcc977 BY |
422 | if (ep != cp) { |
423 | strbuf_add(&msgbuf, plain, strlen(plain)); | |
424 | strbuf_add(&msgbuf, cp, ep - cp); | |
425 | strbuf_add(&msgbuf, reset, strlen(reset)); | |
426 | } | |
427 | ||
428 | if (ep < line + len) { | |
429 | strbuf_add(&msgbuf, func, strlen(func)); | |
430 | strbuf_add(&msgbuf, ep, line + len - ep); | |
431 | strbuf_add(&msgbuf, reset, strlen(reset)); | |
432 | } | |
89cb73a1 | 433 | |
2efcc977 BY |
434 | strbuf_add(&msgbuf, line + len, org_len - len); |
435 | emit_line(ecbdata->opt, "", "", msgbuf.buf, msgbuf.len); | |
436 | strbuf_release(&msgbuf); | |
89cb73a1 BW |
437 | } |
438 | ||
479b0ae8 JK |
439 | static struct diff_tempfile *claim_diff_tempfile(void) { |
440 | int i; | |
441 | for (i = 0; i < ARRAY_SIZE(diff_temp); i++) | |
442 | if (!diff_temp[i].name) | |
443 | return diff_temp + i; | |
444 | die("BUG: diff is failing to clean up its tempfiles"); | |
445 | } | |
446 | ||
447 | static int remove_tempfile_installed; | |
448 | ||
449 | static void remove_tempfile(void) | |
450 | { | |
451 | int i; | |
a8344abe NR |
452 | for (i = 0; i < ARRAY_SIZE(diff_temp); i++) { |
453 | if (diff_temp[i].name == diff_temp[i].tmp_path) | |
691f1a28 | 454 | unlink_or_warn(diff_temp[i].name); |
a8344abe NR |
455 | diff_temp[i].name = NULL; |
456 | } | |
479b0ae8 JK |
457 | } |
458 | ||
459 | static void remove_tempfile_on_signal(int signo) | |
460 | { | |
461 | remove_tempfile(); | |
4a16d072 | 462 | sigchain_pop(signo); |
479b0ae8 JK |
463 | raise(signo); |
464 | } | |
465 | ||
c0c77734 | 466 | static void print_line_count(FILE *file, int count) |
6973dcae JH |
467 | { |
468 | switch (count) { | |
469 | case 0: | |
c0c77734 | 470 | fprintf(file, "0,0"); |
6973dcae JH |
471 | break; |
472 | case 1: | |
c0c77734 | 473 | fprintf(file, "1"); |
6973dcae JH |
474 | break; |
475 | default: | |
c0c77734 | 476 | fprintf(file, "1,%d", count); |
6973dcae JH |
477 | break; |
478 | } | |
479 | } | |
480 | ||
7f7ee2ff JH |
481 | static void emit_rewrite_lines(struct emit_callback *ecb, |
482 | int prefix, const char *data, int size) | |
6973dcae | 483 | { |
7f7ee2ff JH |
484 | const char *endp = NULL; |
485 | static const char *nneof = " No newline at end of file\n"; | |
486 | const char *old = diff_get_color(ecb->color_diff, DIFF_FILE_OLD); | |
487 | const char *reset = diff_get_color(ecb->color_diff, DIFF_RESET); | |
488 | ||
489 | while (0 < size) { | |
490 | int len; | |
491 | ||
492 | endp = memchr(data, '\n', size); | |
493 | len = endp ? (endp - data + 1) : size; | |
494 | if (prefix != '+') { | |
495 | ecb->lno_in_preimage++; | |
a3c158d4 | 496 | emit_line_0(ecb->opt, old, reset, '-', |
7f7ee2ff JH |
497 | data, len); |
498 | } else { | |
499 | ecb->lno_in_postimage++; | |
500 | emit_add_line(reset, ecb, data, len); | |
13e36ec5 | 501 | } |
7f7ee2ff JH |
502 | size -= len; |
503 | data += len; | |
504 | } | |
505 | if (!endp) { | |
506 | const char *plain = diff_get_color(ecb->color_diff, | |
507 | DIFF_PLAIN); | |
a3c158d4 | 508 | emit_line_0(ecb->opt, plain, reset, '\\', |
7f7ee2ff | 509 | nneof, strlen(nneof)); |
6973dcae | 510 | } |
6973dcae JH |
511 | } |
512 | ||
513 | static void emit_rewrite_diff(const char *name_a, | |
514 | const char *name_b, | |
515 | struct diff_filespec *one, | |
13e36ec5 | 516 | struct diff_filespec *two, |
d9bae1a1 JK |
517 | struct userdiff_driver *textconv_one, |
518 | struct userdiff_driver *textconv_two, | |
eab9a40b | 519 | struct diff_options *o) |
6973dcae JH |
520 | { |
521 | int lc_a, lc_b; | |
eab9a40b | 522 | int color_diff = DIFF_OPT_TST(o, COLOR_DIFF); |
1a9eb3b9 | 523 | const char *name_a_tab, *name_b_tab; |
13e36ec5 JS |
524 | const char *metainfo = diff_get_color(color_diff, DIFF_METAINFO); |
525 | const char *fraginfo = diff_get_color(color_diff, DIFF_FRAGINFO); | |
13e36ec5 | 526 | const char *reset = diff_get_color(color_diff, DIFF_RESET); |
d5625091 | 527 | static struct strbuf a_name = STRBUF_INIT, b_name = STRBUF_INIT; |
a5a818ee | 528 | const char *a_prefix, *b_prefix; |
840383b2 | 529 | char *data_one, *data_two; |
3aa1f7ca | 530 | size_t size_one, size_two; |
7f7ee2ff | 531 | struct emit_callback ecbdata; |
7be57610 BY |
532 | char *line_prefix = ""; |
533 | struct strbuf *msgbuf; | |
534 | ||
535 | if (o && o->output_prefix) { | |
536 | msgbuf = o->output_prefix(o, o->output_prefix_data); | |
537 | line_prefix = msgbuf->buf; | |
538 | } | |
a5a818ee JH |
539 | |
540 | if (diff_mnemonic_prefix && DIFF_OPT_TST(o, REVERSE_DIFF)) { | |
541 | a_prefix = o->b_prefix; | |
542 | b_prefix = o->a_prefix; | |
543 | } else { | |
544 | a_prefix = o->a_prefix; | |
545 | b_prefix = o->b_prefix; | |
546 | } | |
1a9eb3b9 | 547 | |
8a13becc JH |
548 | name_a += (*name_a == '/'); |
549 | name_b += (*name_b == '/'); | |
1a9eb3b9 JH |
550 | name_a_tab = strchr(name_a, ' ') ? "\t" : ""; |
551 | name_b_tab = strchr(name_b, ' ') ? "\t" : ""; | |
552 | ||
d5625091 JH |
553 | strbuf_reset(&a_name); |
554 | strbuf_reset(&b_name); | |
a5a818ee JH |
555 | quote_two_c_style(&a_name, a_prefix, name_a, 0); |
556 | quote_two_c_style(&b_name, b_prefix, name_b, 0); | |
d5625091 | 557 | |
840383b2 JK |
558 | size_one = fill_textconv(textconv_one, one, &data_one); |
559 | size_two = fill_textconv(textconv_two, two, &data_two); | |
3aa1f7ca | 560 | |
d91ba8fa JH |
561 | memset(&ecbdata, 0, sizeof(ecbdata)); |
562 | ecbdata.color_diff = color_diff; | |
563 | ecbdata.found_changesp = &o->found_changes; | |
564 | ecbdata.ws_rule = whitespace_rule(name_b ? name_b : name_a); | |
a3c158d4 | 565 | ecbdata.opt = o; |
d91ba8fa JH |
566 | if (ecbdata.ws_rule & WS_BLANK_AT_EOF) { |
567 | mmfile_t mf1, mf2; | |
568 | mf1.ptr = (char *)data_one; | |
569 | mf2.ptr = (char *)data_two; | |
570 | mf1.size = size_one; | |
571 | mf2.size = size_two; | |
572 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
573 | } | |
574 | ecbdata.lno_in_preimage = 1; | |
575 | ecbdata.lno_in_postimage = 1; | |
576 | ||
3aa1f7ca JK |
577 | lc_a = count_lines(data_one, size_one); |
578 | lc_b = count_lines(data_two, size_two); | |
c0c77734 | 579 | fprintf(o->file, |
7be57610 BY |
580 | "%s%s--- %s%s%s\n%s%s+++ %s%s%s\n%s%s@@ -", |
581 | line_prefix, metainfo, a_name.buf, name_a_tab, reset, | |
582 | line_prefix, metainfo, b_name.buf, name_b_tab, reset, | |
583 | line_prefix, fraginfo); | |
c0c77734 DB |
584 | print_line_count(o->file, lc_a); |
585 | fprintf(o->file, " +"); | |
586 | print_line_count(o->file, lc_b); | |
587 | fprintf(o->file, " @@%s\n", reset); | |
6973dcae | 588 | if (lc_a) |
d91ba8fa | 589 | emit_rewrite_lines(&ecbdata, '-', data_one, size_one); |
6973dcae | 590 | if (lc_b) |
d91ba8fa | 591 | emit_rewrite_lines(&ecbdata, '+', data_two, size_two); |
b76c056b | 592 | if (textconv_one) |
aed6ca52 | 593 | free((char *)data_one); |
b76c056b | 594 | if (textconv_two) |
aed6ca52 | 595 | free((char *)data_two); |
6973dcae JH |
596 | } |
597 | ||
f59a59e2 JS |
598 | struct diff_words_buffer { |
599 | mmfile_t text; | |
600 | long alloc; | |
2e5d2003 JS |
601 | struct diff_words_orig { |
602 | const char *begin, *end; | |
603 | } *orig; | |
604 | int orig_nr, orig_alloc; | |
f59a59e2 JS |
605 | }; |
606 | ||
607 | static void diff_words_append(char *line, unsigned long len, | |
608 | struct diff_words_buffer *buffer) | |
609 | { | |
23c1575f | 610 | ALLOC_GROW(buffer->text.ptr, buffer->text.size + len, buffer->alloc); |
f59a59e2 JS |
611 | line++; |
612 | len--; | |
613 | memcpy(buffer->text.ptr + buffer->text.size, line, len); | |
614 | buffer->text.size += len; | |
2b6a5417 | 615 | buffer->text.ptr[buffer->text.size] = '\0'; |
f59a59e2 JS |
616 | } |
617 | ||
9cba13ca | 618 | struct diff_words_style_elem { |
882749a0 TR |
619 | const char *prefix; |
620 | const char *suffix; | |
621 | const char *color; /* NULL; filled in by the setup code if | |
622 | * color is enabled */ | |
623 | }; | |
624 | ||
9cba13ca | 625 | struct diff_words_style { |
882749a0 TR |
626 | enum diff_words_type type; |
627 | struct diff_words_style_elem new, old, ctx; | |
628 | const char *newline; | |
629 | }; | |
630 | ||
c2e86add | 631 | static struct diff_words_style diff_words_styles[] = { |
882749a0 TR |
632 | { DIFF_WORDS_PORCELAIN, {"+", "\n"}, {"-", "\n"}, {" ", "\n"}, "~\n" }, |
633 | { DIFF_WORDS_PLAIN, {"{+", "+}"}, {"[-", "-]"}, {"", ""}, "\n" }, | |
634 | { DIFF_WORDS_COLOR, {"", ""}, {"", ""}, {"", ""}, "\n" } | |
635 | }; | |
636 | ||
f59a59e2 | 637 | struct diff_words_data { |
f59a59e2 | 638 | struct diff_words_buffer minus, plus; |
2e5d2003 | 639 | const char *current_plus; |
4297c0ae BY |
640 | int last_minus; |
641 | struct diff_options *opt; | |
2b6a5417 | 642 | regex_t *word_regex; |
882749a0 TR |
643 | enum diff_words_type type; |
644 | struct diff_words_style *style; | |
f59a59e2 JS |
645 | }; |
646 | ||
882749a0 TR |
647 | static int fn_out_diff_words_write_helper(FILE *fp, |
648 | struct diff_words_style_elem *st_el, | |
649 | const char *newline, | |
4297c0ae BY |
650 | size_t count, const char *buf, |
651 | const char *line_prefix) | |
882749a0 | 652 | { |
4297c0ae BY |
653 | int print = 0; |
654 | ||
882749a0 TR |
655 | while (count) { |
656 | char *p = memchr(buf, '\n', count); | |
4297c0ae BY |
657 | if (print) |
658 | fputs(line_prefix, fp); | |
882749a0 TR |
659 | if (p != buf) { |
660 | if (st_el->color && fputs(st_el->color, fp) < 0) | |
661 | return -1; | |
662 | if (fputs(st_el->prefix, fp) < 0 || | |
663 | fwrite(buf, p ? p - buf : count, 1, fp) != 1 || | |
664 | fputs(st_el->suffix, fp) < 0) | |
665 | return -1; | |
666 | if (st_el->color && *st_el->color | |
667 | && fputs(GIT_COLOR_RESET, fp) < 0) | |
668 | return -1; | |
669 | } | |
670 | if (!p) | |
671 | return 0; | |
672 | if (fputs(newline, fp) < 0) | |
673 | return -1; | |
674 | count -= p + 1 - buf; | |
675 | buf = p + 1; | |
4297c0ae | 676 | print = 1; |
882749a0 TR |
677 | } |
678 | return 0; | |
679 | } | |
680 | ||
4297c0ae BY |
681 | /* |
682 | * '--color-words' algorithm can be described as: | |
683 | * | |
684 | * 1. collect a the minus/plus lines of a diff hunk, divided into | |
685 | * minus-lines and plus-lines; | |
686 | * | |
687 | * 2. break both minus-lines and plus-lines into words and | |
688 | * place them into two mmfile_t with one word for each line; | |
689 | * | |
690 | * 3. use xdiff to run diff on the two mmfile_t to get the words level diff; | |
691 | * | |
692 | * And for the common parts of the both file, we output the plus side text. | |
693 | * diff_words->current_plus is used to trace the current position of the plus file | |
694 | * which printed. diff_words->last_minus is used to trace the last minus word | |
695 | * printed. | |
696 | * | |
697 | * For '--graph' to work with '--color-words', we need to output the graph prefix | |
698 | * on each line of color words output. Generally, there are two conditions on | |
699 | * which we should output the prefix. | |
700 | * | |
701 | * 1. diff_words->last_minus == 0 && | |
702 | * diff_words->current_plus == diff_words->plus.text.ptr | |
703 | * | |
704 | * that is: the plus text must start as a new line, and if there is no minus | |
705 | * word printed, a graph prefix must be printed. | |
706 | * | |
707 | * 2. diff_words->current_plus > diff_words->plus.text.ptr && | |
708 | * *(diff_words->current_plus - 1) == '\n' | |
709 | * | |
710 | * that is: a graph prefix must be printed following a '\n' | |
711 | */ | |
712 | static int color_words_output_graph_prefix(struct diff_words_data *diff_words) | |
713 | { | |
714 | if ((diff_words->last_minus == 0 && | |
715 | diff_words->current_plus == diff_words->plus.text.ptr) || | |
716 | (diff_words->current_plus > diff_words->plus.text.ptr && | |
717 | *(diff_words->current_plus - 1) == '\n')) { | |
718 | return 1; | |
719 | } else { | |
720 | return 0; | |
721 | } | |
722 | } | |
723 | ||
f59a59e2 | 724 | static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len) |
f59a59e2 | 725 | { |
f59a59e2 | 726 | struct diff_words_data *diff_words = priv; |
882749a0 | 727 | struct diff_words_style *style = diff_words->style; |
2e5d2003 JS |
728 | int minus_first, minus_len, plus_first, plus_len; |
729 | const char *minus_begin, *minus_end, *plus_begin, *plus_end; | |
4297c0ae BY |
730 | struct diff_options *opt = diff_words->opt; |
731 | struct strbuf *msgbuf; | |
732 | char *line_prefix = ""; | |
f59a59e2 | 733 | |
2e5d2003 JS |
734 | if (line[0] != '@' || parse_hunk_header(line, len, |
735 | &minus_first, &minus_len, &plus_first, &plus_len)) | |
f59a59e2 JS |
736 | return; |
737 | ||
4297c0ae BY |
738 | assert(opt); |
739 | if (opt->output_prefix) { | |
740 | msgbuf = opt->output_prefix(opt, opt->output_prefix_data); | |
741 | line_prefix = msgbuf->buf; | |
742 | } | |
743 | ||
2e5d2003 JS |
744 | /* POSIX requires that first be decremented by one if len == 0... */ |
745 | if (minus_len) { | |
746 | minus_begin = diff_words->minus.orig[minus_first].begin; | |
747 | minus_end = | |
748 | diff_words->minus.orig[minus_first + minus_len - 1].end; | |
749 | } else | |
750 | minus_begin = minus_end = | |
751 | diff_words->minus.orig[minus_first].end; | |
752 | ||
753 | if (plus_len) { | |
754 | plus_begin = diff_words->plus.orig[plus_first].begin; | |
755 | plus_end = diff_words->plus.orig[plus_first + plus_len - 1].end; | |
756 | } else | |
757 | plus_begin = plus_end = diff_words->plus.orig[plus_first].end; | |
758 | ||
4297c0ae BY |
759 | if (color_words_output_graph_prefix(diff_words)) { |
760 | fputs(line_prefix, diff_words->opt->file); | |
761 | } | |
762 | if (diff_words->current_plus != plus_begin) { | |
763 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 TR |
764 | &style->ctx, style->newline, |
765 | plus_begin - diff_words->current_plus, | |
4297c0ae BY |
766 | diff_words->current_plus, line_prefix); |
767 | if (*(plus_begin - 1) == '\n') | |
768 | fputs(line_prefix, diff_words->opt->file); | |
769 | } | |
770 | if (minus_begin != minus_end) { | |
771 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 772 | &style->old, style->newline, |
4297c0ae BY |
773 | minus_end - minus_begin, minus_begin, |
774 | line_prefix); | |
775 | } | |
776 | if (plus_begin != plus_end) { | |
777 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 778 | &style->new, style->newline, |
4297c0ae BY |
779 | plus_end - plus_begin, plus_begin, |
780 | line_prefix); | |
781 | } | |
2e5d2003 JS |
782 | |
783 | diff_words->current_plus = plus_end; | |
4297c0ae | 784 | diff_words->last_minus = minus_first; |
f59a59e2 JS |
785 | } |
786 | ||
2b6a5417 JS |
787 | /* This function starts looking at *begin, and returns 0 iff a word was found. */ |
788 | static int find_word_boundaries(mmfile_t *buffer, regex_t *word_regex, | |
789 | int *begin, int *end) | |
790 | { | |
791 | if (word_regex && *begin < buffer->size) { | |
792 | regmatch_t match[1]; | |
793 | if (!regexec(word_regex, buffer->ptr + *begin, 1, match, 0)) { | |
794 | char *p = memchr(buffer->ptr + *begin + match[0].rm_so, | |
795 | '\n', match[0].rm_eo - match[0].rm_so); | |
796 | *end = p ? p - buffer->ptr : match[0].rm_eo + *begin; | |
797 | *begin += match[0].rm_so; | |
798 | return *begin >= *end; | |
799 | } | |
800 | return -1; | |
f59a59e2 JS |
801 | } |
802 | ||
2b6a5417 JS |
803 | /* find the next word */ |
804 | while (*begin < buffer->size && isspace(buffer->ptr[*begin])) | |
805 | (*begin)++; | |
806 | if (*begin >= buffer->size) | |
807 | return -1; | |
f59a59e2 | 808 | |
2b6a5417 JS |
809 | /* find the end of the word */ |
810 | *end = *begin + 1; | |
811 | while (*end < buffer->size && !isspace(buffer->ptr[*end])) | |
812 | (*end)++; | |
813 | ||
814 | return 0; | |
f59a59e2 JS |
815 | } |
816 | ||
23c1575f | 817 | /* |
2e5d2003 JS |
818 | * This function splits the words in buffer->text, stores the list with |
819 | * newline separator into out, and saves the offsets of the original words | |
820 | * in buffer->orig. | |
23c1575f | 821 | */ |
2b6a5417 JS |
822 | static void diff_words_fill(struct diff_words_buffer *buffer, mmfile_t *out, |
823 | regex_t *word_regex) | |
f59a59e2 | 824 | { |
2e5d2003 | 825 | int i, j; |
2b6a5417 | 826 | long alloc = 0; |
f59a59e2 | 827 | |
2e5d2003 | 828 | out->size = 0; |
2b6a5417 | 829 | out->ptr = NULL; |
f59a59e2 | 830 | |
2e5d2003 JS |
831 | /* fake an empty "0th" word */ |
832 | ALLOC_GROW(buffer->orig, 1, buffer->orig_alloc); | |
833 | buffer->orig[0].begin = buffer->orig[0].end = buffer->text.ptr; | |
834 | buffer->orig_nr = 1; | |
835 | ||
836 | for (i = 0; i < buffer->text.size; i++) { | |
2b6a5417 JS |
837 | if (find_word_boundaries(&buffer->text, word_regex, &i, &j)) |
838 | return; | |
2e5d2003 JS |
839 | |
840 | /* store original boundaries */ | |
841 | ALLOC_GROW(buffer->orig, buffer->orig_nr + 1, | |
842 | buffer->orig_alloc); | |
843 | buffer->orig[buffer->orig_nr].begin = buffer->text.ptr + i; | |
844 | buffer->orig[buffer->orig_nr].end = buffer->text.ptr + j; | |
845 | buffer->orig_nr++; | |
846 | ||
847 | /* store one word */ | |
2b6a5417 | 848 | ALLOC_GROW(out->ptr, out->size + j - i + 1, alloc); |
2e5d2003 JS |
849 | memcpy(out->ptr + out->size, buffer->text.ptr + i, j - i); |
850 | out->ptr[out->size + j - i] = '\n'; | |
851 | out->size += j - i + 1; | |
852 | ||
853 | i = j - 1; | |
f59a59e2 JS |
854 | } |
855 | } | |
856 | ||
857 | /* this executes the word diff on the accumulated buffers */ | |
858 | static void diff_words_show(struct diff_words_data *diff_words) | |
859 | { | |
860 | xpparam_t xpp; | |
861 | xdemitconf_t xecfg; | |
f59a59e2 | 862 | mmfile_t minus, plus; |
882749a0 | 863 | struct diff_words_style *style = diff_words->style; |
f59a59e2 | 864 | |
4297c0ae BY |
865 | struct diff_options *opt = diff_words->opt; |
866 | struct strbuf *msgbuf; | |
867 | char *line_prefix = ""; | |
868 | ||
869 | assert(opt); | |
870 | if (opt->output_prefix) { | |
871 | msgbuf = opt->output_prefix(opt, opt->output_prefix_data); | |
872 | line_prefix = msgbuf->buf; | |
873 | } | |
874 | ||
2e5d2003 JS |
875 | /* special case: only removal */ |
876 | if (!diff_words->plus.text.size) { | |
4297c0ae BY |
877 | fputs(line_prefix, diff_words->opt->file); |
878 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 879 | &style->old, style->newline, |
4297c0ae BY |
880 | diff_words->minus.text.size, |
881 | diff_words->minus.text.ptr, line_prefix); | |
2e5d2003 JS |
882 | diff_words->minus.text.size = 0; |
883 | return; | |
884 | } | |
885 | ||
886 | diff_words->current_plus = diff_words->plus.text.ptr; | |
4297c0ae | 887 | diff_words->last_minus = 0; |
f59a59e2 | 888 | |
9ccd0a88 | 889 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 890 | memset(&xecfg, 0, sizeof(xecfg)); |
2b6a5417 JS |
891 | diff_words_fill(&diff_words->minus, &minus, diff_words->word_regex); |
892 | diff_words_fill(&diff_words->plus, &plus, diff_words->word_regex); | |
582aa00b | 893 | xpp.flags = 0; |
2b6a5417 | 894 | /* as only the hunk header will be parsed, we need a 0-context */ |
2e5d2003 | 895 | xecfg.ctxlen = 0; |
8a3f524b | 896 | xdi_diff_outf(&minus, &plus, fn_out_diff_words_aux, diff_words, |
dfea7900 | 897 | &xpp, &xecfg); |
f59a59e2 JS |
898 | free(minus.ptr); |
899 | free(plus.ptr); | |
2e5d2003 | 900 | if (diff_words->current_plus != diff_words->plus.text.ptr + |
4297c0ae BY |
901 | diff_words->plus.text.size) { |
902 | if (color_words_output_graph_prefix(diff_words)) | |
903 | fputs(line_prefix, diff_words->opt->file); | |
904 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 905 | &style->ctx, style->newline, |
2e5d2003 | 906 | diff_words->plus.text.ptr + diff_words->plus.text.size |
4297c0ae BY |
907 | - diff_words->current_plus, diff_words->current_plus, |
908 | line_prefix); | |
909 | } | |
f59a59e2 | 910 | diff_words->minus.text.size = diff_words->plus.text.size = 0; |
f59a59e2 JS |
911 | } |
912 | ||
76fd2828 JH |
913 | /* In "color-words" mode, show word-diff of words accumulated in the buffer */ |
914 | static void diff_words_flush(struct emit_callback *ecbdata) | |
915 | { | |
916 | if (ecbdata->diff_words->minus.text.size || | |
917 | ecbdata->diff_words->plus.text.size) | |
918 | diff_words_show(ecbdata->diff_words); | |
919 | } | |
920 | ||
f59a59e2 JS |
921 | static void free_diff_words_data(struct emit_callback *ecbdata) |
922 | { | |
923 | if (ecbdata->diff_words) { | |
76fd2828 | 924 | diff_words_flush(ecbdata); |
8e0f7003 | 925 | free (ecbdata->diff_words->minus.text.ptr); |
2e5d2003 | 926 | free (ecbdata->diff_words->minus.orig); |
8e0f7003 | 927 | free (ecbdata->diff_words->plus.text.ptr); |
2e5d2003 | 928 | free (ecbdata->diff_words->plus.orig); |
ef5644ea BC |
929 | if (ecbdata->diff_words->word_regex) { |
930 | regfree(ecbdata->diff_words->word_regex); | |
931 | free(ecbdata->diff_words->word_regex); | |
932 | } | |
f59a59e2 JS |
933 | free(ecbdata->diff_words); |
934 | ecbdata->diff_words = NULL; | |
935 | } | |
936 | } | |
937 | ||
ce436973 | 938 | const char *diff_get_color(int diff_use_color, enum color_diff ix) |
cd112cef JS |
939 | { |
940 | if (diff_use_color) | |
50f575fc LT |
941 | return diff_colors[ix]; |
942 | return ""; | |
cd112cef JS |
943 | } |
944 | ||
23707811 JH |
945 | static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, unsigned long len) |
946 | { | |
947 | const char *cp; | |
948 | unsigned long allot; | |
949 | size_t l = len; | |
950 | ||
951 | if (ecb->truncate) | |
952 | return ecb->truncate(line, len); | |
953 | cp = line; | |
954 | allot = l; | |
955 | while (0 < l) { | |
956 | (void) utf8_width(&cp, &l); | |
957 | if (!cp) | |
958 | break; /* truncated in the middle? */ | |
959 | } | |
960 | return allot - l; | |
961 | } | |
962 | ||
d68fe26f | 963 | static void find_lno(const char *line, struct emit_callback *ecbdata) |
690ed843 | 964 | { |
d68fe26f JH |
965 | const char *p; |
966 | ecbdata->lno_in_preimage = 0; | |
967 | ecbdata->lno_in_postimage = 0; | |
968 | p = strchr(line, '-'); | |
690ed843 | 969 | if (!p) |
d68fe26f JH |
970 | return; /* cannot happen */ |
971 | ecbdata->lno_in_preimage = strtol(p + 1, NULL, 10); | |
972 | p = strchr(p, '+'); | |
973 | if (!p) | |
974 | return; /* cannot happen */ | |
975 | ecbdata->lno_in_postimage = strtol(p + 1, NULL, 10); | |
690ed843 JH |
976 | } |
977 | ||
cd112cef | 978 | static void fn_out_consume(void *priv, char *line, unsigned long len) |
6973dcae | 979 | { |
6973dcae | 980 | struct emit_callback *ecbdata = priv; |
472ca780 JK |
981 | const char *meta = diff_get_color(ecbdata->color_diff, DIFF_METAINFO); |
982 | const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN); | |
ce436973 | 983 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); |
7be57610 BY |
984 | struct diff_options *o = ecbdata->opt; |
985 | char *line_prefix = ""; | |
986 | struct strbuf *msgbuf; | |
987 | ||
988 | if (o && o->output_prefix) { | |
989 | msgbuf = o->output_prefix(o, o->output_prefix_data); | |
990 | line_prefix = msgbuf->buf; | |
991 | } | |
6973dcae | 992 | |
3e97c7c6 | 993 | if (ecbdata->header) { |
a3c158d4 | 994 | fprintf(ecbdata->opt->file, "%s", ecbdata->header->buf); |
3e97c7c6 GB |
995 | strbuf_reset(ecbdata->header); |
996 | ecbdata->header = NULL; | |
997 | } | |
34a5e1a2 JS |
998 | *(ecbdata->found_changesp) = 1; |
999 | ||
6973dcae | 1000 | if (ecbdata->label_path[0]) { |
1a9eb3b9 JH |
1001 | const char *name_a_tab, *name_b_tab; |
1002 | ||
1003 | name_a_tab = strchr(ecbdata->label_path[0], ' ') ? "\t" : ""; | |
1004 | name_b_tab = strchr(ecbdata->label_path[1], ' ') ? "\t" : ""; | |
1005 | ||
7be57610 BY |
1006 | fprintf(ecbdata->opt->file, "%s%s--- %s%s%s\n", |
1007 | line_prefix, meta, ecbdata->label_path[0], reset, name_a_tab); | |
1008 | fprintf(ecbdata->opt->file, "%s%s+++ %s%s%s\n", | |
1009 | line_prefix, meta, ecbdata->label_path[1], reset, name_b_tab); | |
6973dcae JH |
1010 | ecbdata->label_path[0] = ecbdata->label_path[1] = NULL; |
1011 | } | |
cd112cef | 1012 | |
a624eaa7 JM |
1013 | if (diff_suppress_blank_empty |
1014 | && len == 2 && line[0] == ' ' && line[1] == '\n') { | |
1015 | line[0] = '\n'; | |
1016 | len = 1; | |
1017 | } | |
1018 | ||
b8d9c1a6 | 1019 | if (line[0] == '@') { |
76fd2828 JH |
1020 | if (ecbdata->diff_words) |
1021 | diff_words_flush(ecbdata); | |
23707811 | 1022 | len = sane_truncate_line(ecbdata, line, len); |
d68fe26f | 1023 | find_lno(line, ecbdata); |
89cb73a1 | 1024 | emit_hunk_header(ecbdata, line, len); |
23707811 | 1025 | if (line[len-1] != '\n') |
a3c158d4 | 1026 | putc('\n', ecbdata->opt->file); |
448c3ef1 | 1027 | return; |
cd112cef | 1028 | } |
448c3ef1 | 1029 | |
b8d9c1a6 | 1030 | if (len < 1) { |
a3c158d4 | 1031 | emit_line(ecbdata->opt, reset, reset, line, len); |
882749a0 TR |
1032 | if (ecbdata->diff_words |
1033 | && ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) | |
a3c158d4 | 1034 | fputs("~\n", ecbdata->opt->file); |
448c3ef1 | 1035 | return; |
cd112cef | 1036 | } |
448c3ef1 | 1037 | |
448c3ef1 JH |
1038 | if (ecbdata->diff_words) { |
1039 | if (line[0] == '-') { | |
1040 | diff_words_append(line, len, | |
1041 | &ecbdata->diff_words->minus); | |
1042 | return; | |
1043 | } else if (line[0] == '+') { | |
1044 | diff_words_append(line, len, | |
1045 | &ecbdata->diff_words->plus); | |
1046 | return; | |
1047 | } | |
76fd2828 | 1048 | diff_words_flush(ecbdata); |
882749a0 | 1049 | if (ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) { |
a3c158d4 BY |
1050 | emit_line(ecbdata->opt, plain, reset, line, len); |
1051 | fputs("~\n", ecbdata->opt->file); | |
882749a0 | 1052 | } else { |
42536dd9 JM |
1053 | /* |
1054 | * Skip the prefix character, if any. With | |
1055 | * diff_suppress_blank_empty, there may be | |
1056 | * none. | |
1057 | */ | |
1058 | if (line[0] != '\n') { | |
1059 | line++; | |
1060 | len--; | |
1061 | } | |
1062 | emit_line(ecbdata->opt, plain, reset, line, len); | |
882749a0 | 1063 | } |
448c3ef1 JH |
1064 | return; |
1065 | } | |
448c3ef1 | 1066 | |
690ed843 JH |
1067 | if (line[0] != '+') { |
1068 | const char *color = | |
1069 | diff_get_color(ecbdata->color_diff, | |
1070 | line[0] == '-' ? DIFF_FILE_OLD : DIFF_PLAIN); | |
1071 | ecbdata->lno_in_preimage++; | |
d68fe26f JH |
1072 | if (line[0] == ' ') |
1073 | ecbdata->lno_in_postimage++; | |
a3c158d4 | 1074 | emit_line(ecbdata->opt, color, reset, line, len); |
d68fe26f JH |
1075 | } else { |
1076 | ecbdata->lno_in_postimage++; | |
018cff70 | 1077 | emit_add_line(reset, ecbdata, line + 1, len - 1); |
448c3ef1 | 1078 | } |
6973dcae JH |
1079 | } |
1080 | ||
1081 | static char *pprint_rename(const char *a, const char *b) | |
1082 | { | |
1083 | const char *old = a; | |
1084 | const char *new = b; | |
f285a2d7 | 1085 | struct strbuf name = STRBUF_INIT; |
6973dcae JH |
1086 | int pfx_length, sfx_length; |
1087 | int len_a = strlen(a); | |
1088 | int len_b = strlen(b); | |
663af342 | 1089 | int a_midlen, b_midlen; |
e5bfbf9b AJ |
1090 | int qlen_a = quote_c_style(a, NULL, NULL, 0); |
1091 | int qlen_b = quote_c_style(b, NULL, NULL, 0); | |
1092 | ||
1093 | if (qlen_a || qlen_b) { | |
663af342 PH |
1094 | quote_c_style(a, &name, NULL, 0); |
1095 | strbuf_addstr(&name, " => "); | |
1096 | quote_c_style(b, &name, NULL, 0); | |
b315c5c0 | 1097 | return strbuf_detach(&name, NULL); |
e5bfbf9b | 1098 | } |
6973dcae JH |
1099 | |
1100 | /* Find common prefix */ | |
1101 | pfx_length = 0; | |
1102 | while (*old && *new && *old == *new) { | |
1103 | if (*old == '/') | |
1104 | pfx_length = old - a + 1; | |
1105 | old++; | |
1106 | new++; | |
1107 | } | |
1108 | ||
1109 | /* Find common suffix */ | |
1110 | old = a + len_a; | |
1111 | new = b + len_b; | |
1112 | sfx_length = 0; | |
1113 | while (a <= old && b <= new && *old == *new) { | |
1114 | if (*old == '/') | |
1115 | sfx_length = len_a - (old - a); | |
1116 | old--; | |
1117 | new--; | |
1118 | } | |
1119 | ||
1120 | /* | |
1121 | * pfx{mid-a => mid-b}sfx | |
1122 | * {pfx-a => pfx-b}sfx | |
1123 | * pfx{sfx-a => sfx-b} | |
1124 | * name-a => name-b | |
1125 | */ | |
663af342 PH |
1126 | a_midlen = len_a - pfx_length - sfx_length; |
1127 | b_midlen = len_b - pfx_length - sfx_length; | |
1128 | if (a_midlen < 0) | |
1129 | a_midlen = 0; | |
1130 | if (b_midlen < 0) | |
1131 | b_midlen = 0; | |
1132 | ||
1133 | strbuf_grow(&name, pfx_length + a_midlen + b_midlen + sfx_length + 7); | |
6973dcae | 1134 | if (pfx_length + sfx_length) { |
663af342 PH |
1135 | strbuf_add(&name, a, pfx_length); |
1136 | strbuf_addch(&name, '{'); | |
6973dcae | 1137 | } |
663af342 PH |
1138 | strbuf_add(&name, a + pfx_length, a_midlen); |
1139 | strbuf_addstr(&name, " => "); | |
1140 | strbuf_add(&name, b + pfx_length, b_midlen); | |
1141 | if (pfx_length + sfx_length) { | |
1142 | strbuf_addch(&name, '}'); | |
1143 | strbuf_add(&name, a + len_a - sfx_length, sfx_length); | |
6973dcae | 1144 | } |
b315c5c0 | 1145 | return strbuf_detach(&name, NULL); |
6973dcae JH |
1146 | } |
1147 | ||
1148 | struct diffstat_t { | |
6973dcae JH |
1149 | int nr; |
1150 | int alloc; | |
1151 | struct diffstat_file { | |
f604652e | 1152 | char *from_name; |
6973dcae | 1153 | char *name; |
f604652e | 1154 | char *print_name; |
6973dcae JH |
1155 | unsigned is_unmerged:1; |
1156 | unsigned is_binary:1; | |
1157 | unsigned is_renamed:1; | |
0974c117 | 1158 | uintmax_t added, deleted; |
6973dcae JH |
1159 | } **files; |
1160 | }; | |
1161 | ||
1162 | static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat, | |
1163 | const char *name_a, | |
1164 | const char *name_b) | |
1165 | { | |
1166 | struct diffstat_file *x; | |
1167 | x = xcalloc(sizeof (*x), 1); | |
1168 | if (diffstat->nr == diffstat->alloc) { | |
1169 | diffstat->alloc = alloc_nr(diffstat->alloc); | |
1170 | diffstat->files = xrealloc(diffstat->files, | |
1171 | diffstat->alloc * sizeof(x)); | |
1172 | } | |
1173 | diffstat->files[diffstat->nr++] = x; | |
1174 | if (name_b) { | |
f604652e JH |
1175 | x->from_name = xstrdup(name_a); |
1176 | x->name = xstrdup(name_b); | |
6973dcae JH |
1177 | x->is_renamed = 1; |
1178 | } | |
f604652e JH |
1179 | else { |
1180 | x->from_name = NULL; | |
9befac47 | 1181 | x->name = xstrdup(name_a); |
f604652e | 1182 | } |
6973dcae JH |
1183 | return x; |
1184 | } | |
1185 | ||
1186 | static void diffstat_consume(void *priv, char *line, unsigned long len) | |
1187 | { | |
1188 | struct diffstat_t *diffstat = priv; | |
1189 | struct diffstat_file *x = diffstat->files[diffstat->nr - 1]; | |
1190 | ||
1191 | if (line[0] == '+') | |
1192 | x->added++; | |
1193 | else if (line[0] == '-') | |
1194 | x->deleted++; | |
1195 | } | |
1196 | ||
698ce6f8 | 1197 | const char mime_boundary_leader[] = "------------"; |
6973dcae | 1198 | |
a2540023 JH |
1199 | static int scale_linear(int it, int width, int max_change) |
1200 | { | |
1201 | /* | |
3ed74e60 JS |
1202 | * make sure that at least one '-' is printed if there were deletions, |
1203 | * and likewise for '+'. | |
a2540023 | 1204 | */ |
3ed74e60 JS |
1205 | if (max_change < 2) |
1206 | return it; | |
1207 | return ((it - 1) * (width - 1) + max_change - 1) / (max_change - 1); | |
a2540023 JH |
1208 | } |
1209 | ||
c0c77734 | 1210 | static void show_name(FILE *file, |
a408e0e6 | 1211 | const char *prefix, const char *name, int len) |
a2540023 | 1212 | { |
a408e0e6 | 1213 | fprintf(file, " %s%-*s |", prefix, len, name); |
a2540023 JH |
1214 | } |
1215 | ||
c0c77734 | 1216 | static void show_graph(FILE *file, char ch, int cnt, const char *set, const char *reset) |
a2540023 JH |
1217 | { |
1218 | if (cnt <= 0) | |
1219 | return; | |
c0c77734 | 1220 | fprintf(file, "%s", set); |
a2540023 | 1221 | while (cnt--) |
c0c77734 DB |
1222 | putc(ch, file); |
1223 | fprintf(file, "%s", reset); | |
a2540023 JH |
1224 | } |
1225 | ||
f604652e JH |
1226 | static void fill_print_name(struct diffstat_file *file) |
1227 | { | |
1228 | char *pname; | |
1229 | ||
1230 | if (file->print_name) | |
1231 | return; | |
1232 | ||
1233 | if (!file->is_renamed) { | |
f285a2d7 | 1234 | struct strbuf buf = STRBUF_INIT; |
f604652e JH |
1235 | if (quote_c_style(file->name, &buf, NULL, 0)) { |
1236 | pname = strbuf_detach(&buf, NULL); | |
1237 | } else { | |
1238 | pname = file->name; | |
1239 | strbuf_release(&buf); | |
1240 | } | |
1241 | } else { | |
1242 | pname = pprint_rename(file->from_name, file->name); | |
1243 | } | |
1244 | file->print_name = pname; | |
1245 | } | |
1246 | ||
4b25d091 | 1247 | static void show_stats(struct diffstat_t *data, struct diff_options *options) |
6973dcae | 1248 | { |
eb3a9dd3 | 1249 | int i, len, add, del, adds = 0, dels = 0; |
0974c117 | 1250 | uintmax_t max_change = 0, max_len = 0; |
6973dcae | 1251 | int total_files = data->nr; |
a2540023 | 1252 | int width, name_width; |
c0aa335c | 1253 | const char *reset, *add_c, *del_c; |
7be57610 BY |
1254 | const char *line_prefix = ""; |
1255 | struct strbuf *msg = NULL; | |
6973dcae JH |
1256 | |
1257 | if (data->nr == 0) | |
1258 | return; | |
1259 | ||
7be57610 BY |
1260 | if (options->output_prefix) { |
1261 | msg = options->output_prefix(options, options->output_prefix_data); | |
1262 | line_prefix = msg->buf; | |
1263 | } | |
1264 | ||
a2540023 JH |
1265 | width = options->stat_width ? options->stat_width : 80; |
1266 | name_width = options->stat_name_width ? options->stat_name_width : 50; | |
1267 | ||
1268 | /* Sanity: give at least 5 columns to the graph, | |
1269 | * but leave at least 10 columns for the name. | |
1270 | */ | |
861d1af3 OM |
1271 | if (width < 25) |
1272 | width = 25; | |
1273 | if (name_width < 10) | |
1274 | name_width = 10; | |
1275 | else if (width < name_width + 15) | |
1276 | name_width = width - 15; | |
a2540023 JH |
1277 | |
1278 | /* Find the longest filename and max number of changes */ | |
8f67f8ae | 1279 | reset = diff_get_color_opt(options, DIFF_RESET); |
8f67f8ae PH |
1280 | add_c = diff_get_color_opt(options, DIFF_FILE_NEW); |
1281 | del_c = diff_get_color_opt(options, DIFF_FILE_OLD); | |
785f7432 | 1282 | |
6973dcae JH |
1283 | for (i = 0; i < data->nr; i++) { |
1284 | struct diffstat_file *file = data->files[i]; | |
0974c117 | 1285 | uintmax_t change = file->added + file->deleted; |
f604652e JH |
1286 | fill_print_name(file); |
1287 | len = strlen(file->print_name); | |
6973dcae JH |
1288 | if (max_len < len) |
1289 | max_len = len; | |
1290 | ||
1291 | if (file->is_binary || file->is_unmerged) | |
1292 | continue; | |
a2540023 JH |
1293 | if (max_change < change) |
1294 | max_change = change; | |
6973dcae JH |
1295 | } |
1296 | ||
a2540023 JH |
1297 | /* Compute the width of the graph part; |
1298 | * 10 is for one blank at the beginning of the line plus | |
1299 | * " | count " between the name and the graph. | |
1300 | * | |
1301 | * From here on, name_width is the width of the name area, | |
1302 | * and width is the width of the graph area. | |
1303 | */ | |
1304 | name_width = (name_width < max_len) ? name_width : max_len; | |
1305 | if (width < (name_width + 10) + max_change) | |
1306 | width = width - (name_width + 10); | |
1307 | else | |
1308 | width = max_change; | |
1309 | ||
6973dcae | 1310 | for (i = 0; i < data->nr; i++) { |
d2543b8e | 1311 | const char *prefix = ""; |
f604652e | 1312 | char *name = data->files[i]->print_name; |
0974c117 JK |
1313 | uintmax_t added = data->files[i]->added; |
1314 | uintmax_t deleted = data->files[i]->deleted; | |
a2540023 | 1315 | int name_len; |
6973dcae JH |
1316 | |
1317 | /* | |
1318 | * "scale" the filename | |
1319 | */ | |
a2540023 JH |
1320 | len = name_width; |
1321 | name_len = strlen(name); | |
1322 | if (name_width < name_len) { | |
6973dcae JH |
1323 | char *slash; |
1324 | prefix = "..."; | |
a2540023 JH |
1325 | len -= 3; |
1326 | name += name_len - len; | |
6973dcae JH |
1327 | slash = strchr(name, '/'); |
1328 | if (slash) | |
1329 | name = slash; | |
1330 | } | |
6973dcae JH |
1331 | |
1332 | if (data->files[i]->is_binary) { | |
7be57610 | 1333 | fprintf(options->file, "%s", line_prefix); |
a408e0e6 | 1334 | show_name(options->file, prefix, name, len); |
c0c77734 | 1335 | fprintf(options->file, " Bin "); |
0974c117 JK |
1336 | fprintf(options->file, "%s%"PRIuMAX"%s", |
1337 | del_c, deleted, reset); | |
c0c77734 | 1338 | fprintf(options->file, " -> "); |
0974c117 JK |
1339 | fprintf(options->file, "%s%"PRIuMAX"%s", |
1340 | add_c, added, reset); | |
c0c77734 DB |
1341 | fprintf(options->file, " bytes"); |
1342 | fprintf(options->file, "\n"); | |
f604652e | 1343 | continue; |
6973dcae JH |
1344 | } |
1345 | else if (data->files[i]->is_unmerged) { | |
7be57610 | 1346 | fprintf(options->file, "%s", line_prefix); |
a408e0e6 | 1347 | show_name(options->file, prefix, name, len); |
c0c77734 | 1348 | fprintf(options->file, " Unmerged\n"); |
f604652e | 1349 | continue; |
6973dcae JH |
1350 | } |
1351 | else if (!data->files[i]->is_renamed && | |
1352 | (added + deleted == 0)) { | |
1353 | total_files--; | |
f604652e | 1354 | continue; |
6973dcae JH |
1355 | } |
1356 | ||
a2540023 JH |
1357 | /* |
1358 | * scale the add/delete | |
1359 | */ | |
6973dcae JH |
1360 | add = added; |
1361 | del = deleted; | |
6973dcae JH |
1362 | adds += add; |
1363 | dels += del; | |
1364 | ||
a2540023 | 1365 | if (width <= max_change) { |
a2540023 | 1366 | add = scale_linear(add, width, max_change); |
3ed74e60 | 1367 | del = scale_linear(del, width, max_change); |
6973dcae | 1368 | } |
7be57610 | 1369 | fprintf(options->file, "%s", line_prefix); |
a408e0e6 | 1370 | show_name(options->file, prefix, name, len); |
0974c117 | 1371 | fprintf(options->file, "%5"PRIuMAX"%s", added + deleted, |
4d9b5359 | 1372 | added + deleted ? " " : ""); |
c0c77734 DB |
1373 | show_graph(options->file, '+', add, add_c, reset); |
1374 | show_graph(options->file, '-', del, del_c, reset); | |
1375 | fprintf(options->file, "\n"); | |
1376 | } | |
7be57610 | 1377 | fprintf(options->file, "%s", line_prefix); |
c0c77734 | 1378 | fprintf(options->file, |
a408e0e6 MH |
1379 | " %d files changed, %d insertions(+), %d deletions(-)\n", |
1380 | total_files, adds, dels); | |
6973dcae JH |
1381 | } |
1382 | ||
2775d92c | 1383 | static void show_shortstats(struct diffstat_t *data, struct diff_options *options) |
ebd124c6 NP |
1384 | { |
1385 | int i, adds = 0, dels = 0, total_files = data->nr; | |
1386 | ||
1387 | if (data->nr == 0) | |
1388 | return; | |
1389 | ||
1390 | for (i = 0; i < data->nr; i++) { | |
1391 | if (!data->files[i]->is_binary && | |
1392 | !data->files[i]->is_unmerged) { | |
1393 | int added = data->files[i]->added; | |
1394 | int deleted= data->files[i]->deleted; | |
1395 | if (!data->files[i]->is_renamed && | |
1396 | (added + deleted == 0)) { | |
1397 | total_files--; | |
1398 | } else { | |
1399 | adds += added; | |
1400 | dels += deleted; | |
1401 | } | |
1402 | } | |
ebd124c6 | 1403 | } |
7be57610 BY |
1404 | if (options->output_prefix) { |
1405 | struct strbuf *msg = NULL; | |
1406 | msg = options->output_prefix(options, | |
1407 | options->output_prefix_data); | |
1408 | fprintf(options->file, "%s", msg->buf); | |
1409 | } | |
c0c77734 | 1410 | fprintf(options->file, " %d files changed, %d insertions(+), %d deletions(-)\n", |
ebd124c6 NP |
1411 | total_files, adds, dels); |
1412 | } | |
1413 | ||
4b25d091 | 1414 | static void show_numstat(struct diffstat_t *data, struct diff_options *options) |
74e2abe5 JH |
1415 | { |
1416 | int i; | |
1417 | ||
f604652e JH |
1418 | if (data->nr == 0) |
1419 | return; | |
1420 | ||
74e2abe5 JH |
1421 | for (i = 0; i < data->nr; i++) { |
1422 | struct diffstat_file *file = data->files[i]; | |
1423 | ||
7be57610 BY |
1424 | if (options->output_prefix) { |
1425 | struct strbuf *msg = NULL; | |
1426 | msg = options->output_prefix(options, | |
1427 | options->output_prefix_data); | |
1428 | fprintf(options->file, "%s", msg->buf); | |
1429 | } | |
1430 | ||
bfddbc5e | 1431 | if (file->is_binary) |
c0c77734 | 1432 | fprintf(options->file, "-\t-\t"); |
bfddbc5e | 1433 | else |
c0c77734 | 1434 | fprintf(options->file, |
0974c117 JK |
1435 | "%"PRIuMAX"\t%"PRIuMAX"\t", |
1436 | file->added, file->deleted); | |
f604652e JH |
1437 | if (options->line_termination) { |
1438 | fill_print_name(file); | |
1439 | if (!file->is_renamed) | |
c0c77734 | 1440 | write_name_quoted(file->name, options->file, |
f604652e JH |
1441 | options->line_termination); |
1442 | else { | |
c0c77734 DB |
1443 | fputs(file->print_name, options->file); |
1444 | putc(options->line_termination, options->file); | |
f604652e | 1445 | } |
663af342 | 1446 | } else { |
f604652e | 1447 | if (file->is_renamed) { |
c0c77734 DB |
1448 | putc('\0', options->file); |
1449 | write_name_quoted(file->from_name, options->file, '\0'); | |
f604652e | 1450 | } |
c0c77734 | 1451 | write_name_quoted(file->name, options->file, '\0'); |
663af342 | 1452 | } |
74e2abe5 JH |
1453 | } |
1454 | } | |
1455 | ||
c04a7155 JH |
1456 | struct dirstat_file { |
1457 | const char *name; | |
1458 | unsigned long changed; | |
7df7c019 LT |
1459 | }; |
1460 | ||
c04a7155 JH |
1461 | struct dirstat_dir { |
1462 | struct dirstat_file *files; | |
1463 | int alloc, nr, percent, cumulative; | |
1464 | }; | |
1465 | ||
7be57610 BY |
1466 | static long gather_dirstat(struct diff_options *opt, struct dirstat_dir *dir, |
1467 | unsigned long changed, const char *base, int baselen) | |
7df7c019 LT |
1468 | { |
1469 | unsigned long this_dir = 0; | |
1470 | unsigned int sources = 0; | |
7be57610 BY |
1471 | const char *line_prefix = ""; |
1472 | struct strbuf *msg = NULL; | |
1473 | ||
1474 | if (opt->output_prefix) { | |
1475 | msg = opt->output_prefix(opt, opt->output_prefix_data); | |
1476 | line_prefix = msg->buf; | |
1477 | } | |
7df7c019 LT |
1478 | |
1479 | while (dir->nr) { | |
c04a7155 | 1480 | struct dirstat_file *f = dir->files; |
7df7c019 LT |
1481 | int namelen = strlen(f->name); |
1482 | unsigned long this; | |
1483 | char *slash; | |
1484 | ||
1485 | if (namelen < baselen) | |
1486 | break; | |
1487 | if (memcmp(f->name, base, baselen)) | |
1488 | break; | |
1489 | slash = strchr(f->name + baselen, '/'); | |
1490 | if (slash) { | |
1491 | int newbaselen = slash + 1 - f->name; | |
7be57610 | 1492 | this = gather_dirstat(opt, dir, changed, f->name, newbaselen); |
7df7c019 LT |
1493 | sources++; |
1494 | } else { | |
c04a7155 | 1495 | this = f->changed; |
7df7c019 LT |
1496 | dir->files++; |
1497 | dir->nr--; | |
1498 | sources += 2; | |
1499 | } | |
1500 | this_dir += this; | |
1501 | } | |
1502 | ||
1503 | /* | |
1504 | * We don't report dirstat's for | |
1505 | * - the top level | |
1506 | * - or cases where everything came from a single directory | |
1507 | * under this directory (sources == 1). | |
1508 | */ | |
1509 | if (baselen && sources != 1) { | |
1510 | int permille = this_dir * 1000 / changed; | |
1511 | if (permille) { | |
1512 | int percent = permille / 10; | |
1513 | if (percent >= dir->percent) { | |
7be57610 BY |
1514 | fprintf(opt->file, "%s%4d.%01d%% %.*s\n", line_prefix, |
1515 | percent, permille % 10, baselen, base); | |
7df7c019 LT |
1516 | if (!dir->cumulative) |
1517 | return 0; | |
1518 | } | |
1519 | } | |
1520 | } | |
1521 | return this_dir; | |
1522 | } | |
1523 | ||
441bca0b LT |
1524 | static int dirstat_compare(const void *_a, const void *_b) |
1525 | { | |
1526 | const struct dirstat_file *a = _a; | |
1527 | const struct dirstat_file *b = _b; | |
1528 | return strcmp(a->name, b->name); | |
1529 | } | |
1530 | ||
c04a7155 | 1531 | static void show_dirstat(struct diff_options *options) |
7df7c019 LT |
1532 | { |
1533 | int i; | |
1534 | unsigned long changed; | |
c04a7155 JH |
1535 | struct dirstat_dir dir; |
1536 | struct diff_queue_struct *q = &diff_queued_diff; | |
1537 | ||
1538 | dir.files = NULL; | |
1539 | dir.alloc = 0; | |
1540 | dir.nr = 0; | |
1541 | dir.percent = options->dirstat_percent; | |
f88d225f | 1542 | dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); |
7df7c019 | 1543 | |
7df7c019 | 1544 | changed = 0; |
c04a7155 JH |
1545 | for (i = 0; i < q->nr; i++) { |
1546 | struct diff_filepair *p = q->queue[i]; | |
1547 | const char *name; | |
1548 | unsigned long copied, added, damage; | |
0133dab7 | 1549 | int content_changed; |
c04a7155 | 1550 | |
2ca86714 | 1551 | name = p->two->path ? p->two->path : p->one->path; |
c04a7155 | 1552 | |
0133dab7 JH |
1553 | if (p->one->sha1_valid && p->two->sha1_valid) |
1554 | content_changed = hashcmp(p->one->sha1, p->two->sha1); | |
1555 | else | |
1556 | content_changed = 1; | |
1557 | ||
2ff3a803 JH |
1558 | if (!content_changed) { |
1559 | /* | |
1560 | * The SHA1 has not changed, so pre-/post-content is | |
1561 | * identical. We can therefore skip looking at the | |
1562 | * file contents altogether. | |
1563 | */ | |
1564 | damage = 0; | |
1565 | goto found_damage; | |
1566 | } | |
1567 | ||
0133dab7 JH |
1568 | if (DIFF_OPT_TST(options, DIRSTAT_BY_FILE)) { |
1569 | /* | |
1570 | * In --dirstat-by-file mode, we don't really need to | |
1571 | * look at the actual file contents at all. | |
1572 | * The fact that the SHA1 changed is enough for us to | |
1573 | * add this file to the list of results | |
1574 | * (with each file contributing equal damage). | |
1575 | */ | |
2ff3a803 | 1576 | damage = 1; |
0133dab7 JH |
1577 | goto found_damage; |
1578 | } | |
c04a7155 JH |
1579 | |
1580 | if (DIFF_FILE_VALID(p->one) && DIFF_FILE_VALID(p->two)) { | |
1581 | diff_populate_filespec(p->one, 0); | |
1582 | diff_populate_filespec(p->two, 0); | |
1583 | diffcore_count_changes(p->one, p->two, NULL, NULL, 0, | |
1584 | &copied, &added); | |
1585 | diff_free_filespec_data(p->one); | |
1586 | diff_free_filespec_data(p->two); | |
1587 | } else if (DIFF_FILE_VALID(p->one)) { | |
1588 | diff_populate_filespec(p->one, 1); | |
1589 | copied = added = 0; | |
1590 | diff_free_filespec_data(p->one); | |
1591 | } else if (DIFF_FILE_VALID(p->two)) { | |
1592 | diff_populate_filespec(p->two, 1); | |
1593 | copied = 0; | |
1594 | added = p->two->size; | |
1595 | diff_free_filespec_data(p->two); | |
1596 | } else | |
2b0b551d | 1597 | continue; |
c04a7155 JH |
1598 | |
1599 | /* | |
1600 | * Original minus copied is the removed material, | |
1601 | * added is the new material. They are both damages | |
0133dab7 | 1602 | * made to the preimage. |
2ff3a803 JH |
1603 | * If the resulting damage is zero, we know that |
1604 | * diffcore_count_changes() considers the two entries to | |
1605 | * be identical, but since content_changed is true, we | |
1606 | * know that there must have been _some_ kind of change, | |
1607 | * so we force all entries to have damage > 0. | |
c04a7155 JH |
1608 | */ |
1609 | damage = (p->one->size - copied) + added; | |
2ff3a803 | 1610 | if (!damage) |
fd33777b | 1611 | damage = 1; |
c04a7155 | 1612 | |
0133dab7 | 1613 | found_damage: |
c04a7155 JH |
1614 | ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); |
1615 | dir.files[dir.nr].name = name; | |
1616 | dir.files[dir.nr].changed = damage; | |
1617 | changed += damage; | |
1618 | dir.nr++; | |
7df7c019 LT |
1619 | } |
1620 | ||
1621 | /* This can happen even with many files, if everything was renames */ | |
1622 | if (!changed) | |
1623 | return; | |
1624 | ||
1625 | /* Show all directories with more than x% of the changes */ | |
441bca0b | 1626 | qsort(dir.files, dir.nr, sizeof(dir.files[0]), dirstat_compare); |
7be57610 | 1627 | gather_dirstat(options, &dir, changed, "", 0); |
7df7c019 LT |
1628 | } |
1629 | ||
f604652e JH |
1630 | static void free_diffstat_info(struct diffstat_t *diffstat) |
1631 | { | |
1632 | int i; | |
1633 | for (i = 0; i < diffstat->nr; i++) { | |
1634 | struct diffstat_file *f = diffstat->files[i]; | |
1635 | if (f->name != f->print_name) | |
1636 | free(f->print_name); | |
1637 | free(f->name); | |
1638 | free(f->from_name); | |
1639 | free(f); | |
1640 | } | |
1641 | free(diffstat->files); | |
1642 | } | |
1643 | ||
88246898 | 1644 | struct checkdiff_t { |
88246898 | 1645 | const char *filename; |
1ba111d1 | 1646 | int lineno; |
a757c646 | 1647 | int conflict_marker_size; |
1ba111d1 | 1648 | struct diff_options *o; |
cf1b7869 | 1649 | unsigned ws_rule; |
62c64895 | 1650 | unsigned status; |
88246898 JS |
1651 | }; |
1652 | ||
a757c646 | 1653 | static int is_conflict_marker(const char *line, int marker_size, unsigned long len) |
04954043 JH |
1654 | { |
1655 | char firstchar; | |
1656 | int cnt; | |
1657 | ||
a757c646 | 1658 | if (len < marker_size + 1) |
04954043 JH |
1659 | return 0; |
1660 | firstchar = line[0]; | |
1661 | switch (firstchar) { | |
a757c646 | 1662 | case '=': case '>': case '<': case '|': |
04954043 JH |
1663 | break; |
1664 | default: | |
1665 | return 0; | |
1666 | } | |
a757c646 | 1667 | for (cnt = 1; cnt < marker_size; cnt++) |
04954043 JH |
1668 | if (line[cnt] != firstchar) |
1669 | return 0; | |
a757c646 JH |
1670 | /* line[1] thru line[marker_size-1] are same as firstchar */ |
1671 | if (len < marker_size + 1 || !isspace(line[marker_size])) | |
04954043 | 1672 | return 0; |
04954043 JH |
1673 | return 1; |
1674 | } | |
1675 | ||
88246898 JS |
1676 | static void checkdiff_consume(void *priv, char *line, unsigned long len) |
1677 | { | |
1678 | struct checkdiff_t *data = priv; | |
1ba111d1 | 1679 | int color_diff = DIFF_OPT_TST(data->o, COLOR_DIFF); |
a757c646 | 1680 | int marker_size = data->conflict_marker_size; |
1ba111d1 JH |
1681 | const char *ws = diff_get_color(color_diff, DIFF_WHITESPACE); |
1682 | const char *reset = diff_get_color(color_diff, DIFF_RESET); | |
1683 | const char *set = diff_get_color(color_diff, DIFF_FILE_NEW); | |
c1795bb0 | 1684 | char *err; |
7be57610 BY |
1685 | char *line_prefix = ""; |
1686 | struct strbuf *msgbuf; | |
1687 | ||
1688 | assert(data->o); | |
1689 | if (data->o->output_prefix) { | |
1690 | msgbuf = data->o->output_prefix(data->o, | |
1691 | data->o->output_prefix_data); | |
1692 | line_prefix = msgbuf->buf; | |
1693 | } | |
88246898 JS |
1694 | |
1695 | if (line[0] == '+') { | |
18374e58 | 1696 | unsigned bad; |
0ef617f4 | 1697 | data->lineno++; |
a757c646 | 1698 | if (is_conflict_marker(line + 1, marker_size, len - 1)) { |
04954043 JH |
1699 | data->status |= 1; |
1700 | fprintf(data->o->file, | |
7be57610 BY |
1701 | "%s%s:%d: leftover conflict marker\n", |
1702 | line_prefix, data->filename, data->lineno); | |
04954043 | 1703 | } |
8f8841e9 | 1704 | bad = ws_check(line + 1, len - 1, data->ws_rule); |
18374e58 | 1705 | if (!bad) |
c1795bb0 | 1706 | return; |
18374e58 JH |
1707 | data->status |= bad; |
1708 | err = whitespace_error_string(bad); | |
7be57610 BY |
1709 | fprintf(data->o->file, "%s%s:%d: %s.\n", |
1710 | line_prefix, data->filename, data->lineno, err); | |
c1795bb0 | 1711 | free(err); |
a3c158d4 | 1712 | emit_line(data->o, set, reset, line, 1); |
8f8841e9 | 1713 | ws_check_emit(line + 1, len - 1, data->ws_rule, |
1ba111d1 | 1714 | data->o->file, set, reset, ws); |
877f23cc | 1715 | } else if (line[0] == ' ') { |
88246898 | 1716 | data->lineno++; |
877f23cc | 1717 | } else if (line[0] == '@') { |
88246898 JS |
1718 | char *plus = strchr(line, '+'); |
1719 | if (plus) | |
0ef617f4 | 1720 | data->lineno = strtol(plus, NULL, 10) - 1; |
88246898 JS |
1721 | else |
1722 | die("invalid diff"); | |
1723 | } | |
1724 | } | |
1725 | ||
0660626c JH |
1726 | static unsigned char *deflate_it(char *data, |
1727 | unsigned long size, | |
1728 | unsigned long *result_size) | |
051308f6 | 1729 | { |
0660626c JH |
1730 | int bound; |
1731 | unsigned char *deflated; | |
1732 | z_stream stream; | |
1733 | ||
1734 | memset(&stream, 0, sizeof(stream)); | |
12f6c308 | 1735 | deflateInit(&stream, zlib_compression_level); |
0660626c JH |
1736 | bound = deflateBound(&stream, size); |
1737 | deflated = xmalloc(bound); | |
1738 | stream.next_out = deflated; | |
1739 | stream.avail_out = bound; | |
1740 | ||
1741 | stream.next_in = (unsigned char *)data; | |
1742 | stream.avail_in = size; | |
1743 | while (deflate(&stream, Z_FINISH) == Z_OK) | |
1744 | ; /* nothing */ | |
1745 | deflateEnd(&stream); | |
1746 | *result_size = stream.total_out; | |
1747 | return deflated; | |
051308f6 JH |
1748 | } |
1749 | ||
7be57610 | 1750 | static void emit_binary_diff_body(FILE *file, mmfile_t *one, mmfile_t *two, char *prefix) |
051308f6 | 1751 | { |
0660626c JH |
1752 | void *cp; |
1753 | void *delta; | |
1754 | void *deflated; | |
1755 | void *data; | |
1756 | unsigned long orig_size; | |
1757 | unsigned long delta_size; | |
1758 | unsigned long deflate_size; | |
1759 | unsigned long data_size; | |
051308f6 | 1760 | |
0660626c JH |
1761 | /* We could do deflated delta, or we could do just deflated two, |
1762 | * whichever is smaller. | |
051308f6 | 1763 | */ |
0660626c JH |
1764 | delta = NULL; |
1765 | deflated = deflate_it(two->ptr, two->size, &deflate_size); | |
1766 | if (one->size && two->size) { | |
1767 | delta = diff_delta(one->ptr, one->size, | |
1768 | two->ptr, two->size, | |
1769 | &delta_size, deflate_size); | |
1770 | if (delta) { | |
1771 | void *to_free = delta; | |
1772 | orig_size = delta_size; | |
1773 | delta = deflate_it(delta, delta_size, &delta_size); | |
1774 | free(to_free); | |
051308f6 JH |
1775 | } |
1776 | } | |
051308f6 | 1777 | |
0660626c | 1778 | if (delta && delta_size < deflate_size) { |
7be57610 | 1779 | fprintf(file, "%sdelta %lu\n", prefix, orig_size); |
0660626c JH |
1780 | free(deflated); |
1781 | data = delta; | |
1782 | data_size = delta_size; | |
1783 | } | |
1784 | else { | |
7be57610 | 1785 | fprintf(file, "%sliteral %lu\n", prefix, two->size); |
0660626c JH |
1786 | free(delta); |
1787 | data = deflated; | |
1788 | data_size = deflate_size; | |
1789 | } | |
051308f6 | 1790 | |
0660626c JH |
1791 | /* emit data encoded in base85 */ |
1792 | cp = data; | |
1793 | while (data_size) { | |
1794 | int bytes = (52 < data_size) ? 52 : data_size; | |
051308f6 | 1795 | char line[70]; |
0660626c | 1796 | data_size -= bytes; |
051308f6 JH |
1797 | if (bytes <= 26) |
1798 | line[0] = bytes + 'A' - 1; | |
1799 | else | |
1800 | line[0] = bytes - 26 + 'a' - 1; | |
1801 | encode_85(line + 1, cp, bytes); | |
1d7f171c | 1802 | cp = (char *) cp + bytes; |
7be57610 | 1803 | fprintf(file, "%s", prefix); |
c0c77734 DB |
1804 | fputs(line, file); |
1805 | fputc('\n', file); | |
051308f6 | 1806 | } |
7be57610 | 1807 | fprintf(file, "%s\n", prefix); |
0660626c | 1808 | free(data); |
051308f6 JH |
1809 | } |
1810 | ||
7be57610 | 1811 | static void emit_binary_diff(FILE *file, mmfile_t *one, mmfile_t *two, char *prefix) |
d4c452f0 | 1812 | { |
7be57610 BY |
1813 | fprintf(file, "%sGIT binary patch\n", prefix); |
1814 | emit_binary_diff_body(file, one, two, prefix); | |
1815 | emit_binary_diff_body(file, two, one, prefix); | |
d4c452f0 JH |
1816 | } |
1817 | ||
72cf4841 | 1818 | static void diff_filespec_load_driver(struct diff_filespec *one) |
6973dcae | 1819 | { |
d391c0ff JK |
1820 | /* Use already-loaded driver */ |
1821 | if (one->driver) | |
1822 | return; | |
1823 | ||
1824 | if (S_ISREG(one->mode)) | |
122aa6f9 | 1825 | one->driver = userdiff_find_by_path(one->path); |
d391c0ff JK |
1826 | |
1827 | /* Fallback to default settings */ | |
122aa6f9 JK |
1828 | if (!one->driver) |
1829 | one->driver = userdiff_find_by_name("default"); | |
29a3eefd JH |
1830 | } |
1831 | ||
1832 | int diff_filespec_is_binary(struct diff_filespec *one) | |
1833 | { | |
122aa6f9 JK |
1834 | if (one->is_binary == -1) { |
1835 | diff_filespec_load_driver(one); | |
1836 | if (one->driver->binary != -1) | |
1837 | one->is_binary = one->driver->binary; | |
1838 | else { | |
1839 | if (!one->data && DIFF_FILE_VALID(one)) | |
1840 | diff_populate_filespec(one, 0); | |
1841 | if (one->data) | |
1842 | one->is_binary = buffer_is_binary(one->data, | |
1843 | one->size); | |
1844 | if (one->is_binary == -1) | |
1845 | one->is_binary = 0; | |
1846 | } | |
1847 | } | |
29a3eefd | 1848 | return one->is_binary; |
6973dcae JH |
1849 | } |
1850 | ||
be58e70d | 1851 | static const struct userdiff_funcname *diff_funcname_pattern(struct diff_filespec *one) |
f258475a | 1852 | { |
122aa6f9 JK |
1853 | diff_filespec_load_driver(one); |
1854 | return one->driver->funcname.pattern ? &one->driver->funcname : NULL; | |
f258475a JH |
1855 | } |
1856 | ||
80c49c3d TR |
1857 | static const char *userdiff_word_regex(struct diff_filespec *one) |
1858 | { | |
1859 | diff_filespec_load_driver(one); | |
1860 | return one->driver->word_regex; | |
1861 | } | |
1862 | ||
a5a818ee JH |
1863 | void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b) |
1864 | { | |
1865 | if (!options->a_prefix) | |
1866 | options->a_prefix = a; | |
1867 | if (!options->b_prefix) | |
1868 | options->b_prefix = b; | |
1869 | } | |
1870 | ||
a788d7d5 | 1871 | struct userdiff_driver *get_textconv(struct diff_filespec *one) |
04427ac8 JK |
1872 | { |
1873 | if (!DIFF_FILE_VALID(one)) | |
1874 | return NULL; | |
d391c0ff | 1875 | |
04427ac8 | 1876 | diff_filespec_load_driver(one); |
d9bae1a1 JK |
1877 | if (!one->driver->textconv) |
1878 | return NULL; | |
1879 | ||
1880 | if (one->driver->textconv_want_cache && !one->driver->textconv_cache) { | |
1881 | struct notes_cache *c = xmalloc(sizeof(*c)); | |
1882 | struct strbuf name = STRBUF_INIT; | |
1883 | ||
1884 | strbuf_addf(&name, "textconv/%s", one->driver->name); | |
1885 | notes_cache_init(c, name.buf, one->driver->textconv); | |
1886 | one->driver->textconv_cache = c; | |
1887 | } | |
1888 | ||
1889 | return one->driver; | |
04427ac8 JK |
1890 | } |
1891 | ||
6973dcae JH |
1892 | static void builtin_diff(const char *name_a, |
1893 | const char *name_b, | |
1894 | struct diff_filespec *one, | |
1895 | struct diff_filespec *two, | |
1896 | const char *xfrm_msg, | |
296c6bb2 | 1897 | int must_show_header, |
051308f6 | 1898 | struct diff_options *o, |
6973dcae JH |
1899 | int complete_rewrite) |
1900 | { | |
1901 | mmfile_t mf1, mf2; | |
1902 | const char *lbl[2]; | |
1903 | char *a_one, *b_two; | |
8f67f8ae PH |
1904 | const char *set = diff_get_color_opt(o, DIFF_METAINFO); |
1905 | const char *reset = diff_get_color_opt(o, DIFF_RESET); | |
a5a818ee | 1906 | const char *a_prefix, *b_prefix; |
d9bae1a1 JK |
1907 | struct userdiff_driver *textconv_one = NULL; |
1908 | struct userdiff_driver *textconv_two = NULL; | |
3e97c7c6 | 1909 | struct strbuf header = STRBUF_INIT; |
7be57610 BY |
1910 | struct strbuf *msgbuf; |
1911 | char *line_prefix = ""; | |
1912 | ||
1913 | if (o->output_prefix) { | |
1914 | msgbuf = o->output_prefix(o, o->output_prefix_data); | |
1915 | line_prefix = msgbuf->buf; | |
1916 | } | |
a5a818ee | 1917 | |
752c0c24 JS |
1918 | if (DIFF_OPT_TST(o, SUBMODULE_LOG) && |
1919 | (!one->mode || S_ISGITLINK(one->mode)) && | |
1920 | (!two->mode || S_ISGITLINK(two->mode))) { | |
1921 | const char *del = diff_get_color_opt(o, DIFF_FILE_OLD); | |
1922 | const char *add = diff_get_color_opt(o, DIFF_FILE_NEW); | |
1923 | show_submodule_summary(o->file, one ? one->path : two->path, | |
721ceec1 | 1924 | one->sha1, two->sha1, two->dirty_submodule, |
752c0c24 JS |
1925 | del, add, reset); |
1926 | return; | |
1927 | } | |
1928 | ||
3aa1f7ca JK |
1929 | if (DIFF_OPT_TST(o, ALLOW_TEXTCONV)) { |
1930 | textconv_one = get_textconv(one); | |
1931 | textconv_two = get_textconv(two); | |
1932 | } | |
1933 | ||
a5a818ee JH |
1934 | diff_set_mnemonic_prefix(o, "a/", "b/"); |
1935 | if (DIFF_OPT_TST(o, REVERSE_DIFF)) { | |
1936 | a_prefix = o->b_prefix; | |
1937 | b_prefix = o->a_prefix; | |
1938 | } else { | |
1939 | a_prefix = o->a_prefix; | |
1940 | b_prefix = o->b_prefix; | |
1941 | } | |
6973dcae | 1942 | |
71b989e7 LT |
1943 | /* Never use a non-valid filename anywhere if at all possible */ |
1944 | name_a = DIFF_FILE_VALID(one) ? name_a : name_b; | |
1945 | name_b = DIFF_FILE_VALID(two) ? name_b : name_a; | |
1946 | ||
a5a818ee JH |
1947 | a_one = quote_two(a_prefix, name_a + (*name_a == '/')); |
1948 | b_two = quote_two(b_prefix, name_b + (*name_b == '/')); | |
6973dcae JH |
1949 | lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null"; |
1950 | lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null"; | |
7be57610 | 1951 | strbuf_addf(&header, "%s%sdiff --git %s %s%s\n", line_prefix, set, a_one, b_two, reset); |
6973dcae JH |
1952 | if (lbl[0][0] == '/') { |
1953 | /* /dev/null */ | |
7be57610 | 1954 | strbuf_addf(&header, "%s%snew file mode %06o%s\n", line_prefix, set, two->mode, reset); |
37466447 BW |
1955 | if (xfrm_msg) |
1956 | strbuf_addstr(&header, xfrm_msg); | |
296c6bb2 | 1957 | must_show_header = 1; |
6973dcae JH |
1958 | } |
1959 | else if (lbl[1][0] == '/') { | |
7be57610 | 1960 | strbuf_addf(&header, "%s%sdeleted file mode %06o%s\n", line_prefix, set, one->mode, reset); |
37466447 BW |
1961 | if (xfrm_msg) |
1962 | strbuf_addstr(&header, xfrm_msg); | |
296c6bb2 | 1963 | must_show_header = 1; |
6973dcae JH |
1964 | } |
1965 | else { | |
1966 | if (one->mode != two->mode) { | |
7be57610 BY |
1967 | strbuf_addf(&header, "%s%sold mode %06o%s\n", line_prefix, set, one->mode, reset); |
1968 | strbuf_addf(&header, "%s%snew mode %06o%s\n", line_prefix, set, two->mode, reset); | |
296c6bb2 | 1969 | must_show_header = 1; |
cd112cef | 1970 | } |
37466447 BW |
1971 | if (xfrm_msg) |
1972 | strbuf_addstr(&header, xfrm_msg); | |
3e97c7c6 | 1973 | |
6973dcae JH |
1974 | /* |
1975 | * we do not run diff between different kind | |
1976 | * of objects. | |
1977 | */ | |
1978 | if ((one->mode ^ two->mode) & S_IFMT) | |
1979 | goto free_ab_and_return; | |
0c01857d | 1980 | if (complete_rewrite && |
3aa1f7ca JK |
1981 | (textconv_one || !diff_filespec_is_binary(one)) && |
1982 | (textconv_two || !diff_filespec_is_binary(two))) { | |
3e97c7c6 GB |
1983 | fprintf(o->file, "%s", header.buf); |
1984 | strbuf_reset(&header); | |
3aa1f7ca JK |
1985 | emit_rewrite_diff(name_a, name_b, one, two, |
1986 | textconv_one, textconv_two, o); | |
34a5e1a2 | 1987 | o->found_changes = 1; |
6973dcae JH |
1988 | goto free_ab_and_return; |
1989 | } | |
1990 | } | |
1991 | ||
8f67f8ae | 1992 | if (!DIFF_OPT_TST(o, TEXT) && |
b3373982 JK |
1993 | ( (!textconv_one && diff_filespec_is_binary(one)) || |
1994 | (!textconv_two && diff_filespec_is_binary(two)) )) { | |
1995 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
1996 | die("unable to read files to diff"); | |
0660626c JH |
1997 | /* Quite common confusing case */ |
1998 | if (mf1.size == mf2.size && | |
296c6bb2 CC |
1999 | !memcmp(mf1.ptr, mf2.ptr, mf1.size)) { |
2000 | if (must_show_header) | |
2001 | fprintf(o->file, "%s", header.buf); | |
0660626c | 2002 | goto free_ab_and_return; |
296c6bb2 | 2003 | } |
3e97c7c6 GB |
2004 | fprintf(o->file, "%s", header.buf); |
2005 | strbuf_reset(&header); | |
8f67f8ae | 2006 | if (DIFF_OPT_TST(o, BINARY)) |
7be57610 | 2007 | emit_binary_diff(o->file, &mf1, &mf2, line_prefix); |
051308f6 | 2008 | else |
7be57610 BY |
2009 | fprintf(o->file, "%sBinary files %s and %s differ\n", |
2010 | line_prefix, lbl[0], lbl[1]); | |
34a5e1a2 | 2011 | o->found_changes = 1; |
051308f6 | 2012 | } |
6973dcae JH |
2013 | else { |
2014 | /* Crazy xdl interfaces.. */ | |
2015 | const char *diffopts = getenv("GIT_DIFF_OPTS"); | |
2016 | xpparam_t xpp; | |
2017 | xdemitconf_t xecfg; | |
6973dcae | 2018 | struct emit_callback ecbdata; |
be58e70d | 2019 | const struct userdiff_funcname *pe; |
f258475a | 2020 | |
296c6bb2 | 2021 | if (!DIFF_XDL_TST(o, WHITESPACE_FLAGS) || must_show_header) { |
3e97c7c6 GB |
2022 | fprintf(o->file, "%s", header.buf); |
2023 | strbuf_reset(&header); | |
2024 | } | |
2025 | ||
840383b2 JK |
2026 | mf1.size = fill_textconv(textconv_one, one, &mf1.ptr); |
2027 | mf2.size = fill_textconv(textconv_two, two, &mf2.ptr); | |
04427ac8 | 2028 | |
45e7ca0f BC |
2029 | pe = diff_funcname_pattern(one); |
2030 | if (!pe) | |
2031 | pe = diff_funcname_pattern(two); | |
6973dcae | 2032 | |
9ccd0a88 | 2033 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 2034 | memset(&xecfg, 0, sizeof(xecfg)); |
cd112cef | 2035 | memset(&ecbdata, 0, sizeof(ecbdata)); |
6973dcae | 2036 | ecbdata.label_path = lbl; |
8f67f8ae | 2037 | ecbdata.color_diff = DIFF_OPT_TST(o, COLOR_DIFF); |
34a5e1a2 | 2038 | ecbdata.found_changesp = &o->found_changes; |
cf1b7869 | 2039 | ecbdata.ws_rule = whitespace_rule(name_b ? name_b : name_a); |
690ed843 | 2040 | if (ecbdata.ws_rule & WS_BLANK_AT_EOF) |
d68fe26f | 2041 | check_blank_at_eof(&mf1, &mf2, &ecbdata); |
a3c158d4 | 2042 | ecbdata.opt = o; |
3e97c7c6 | 2043 | ecbdata.header = header.len ? &header : NULL; |
582aa00b | 2044 | xpp.flags = o->xdl_opts; |
ee1e5412 | 2045 | xecfg.ctxlen = o->context; |
6d0e674a | 2046 | xecfg.interhunkctxlen = o->interhunkcontext; |
6973dcae | 2047 | xecfg.flags = XDL_EMIT_FUNCNAMES; |
45e7ca0f | 2048 | if (pe) |
a013585b | 2049 | xdiff_set_find_func(&xecfg, pe->pattern, pe->cflags); |
6973dcae JH |
2050 | if (!diffopts) |
2051 | ; | |
cc44c765 | 2052 | else if (!prefixcmp(diffopts, "--unified=")) |
6973dcae | 2053 | xecfg.ctxlen = strtoul(diffopts + 10, NULL, 10); |
cc44c765 | 2054 | else if (!prefixcmp(diffopts, "-u")) |
6973dcae | 2055 | xecfg.ctxlen = strtoul(diffopts + 2, NULL, 10); |
882749a0 TR |
2056 | if (o->word_diff) { |
2057 | int i; | |
2058 | ||
f59a59e2 JS |
2059 | ecbdata.diff_words = |
2060 | xcalloc(1, sizeof(struct diff_words_data)); | |
882749a0 | 2061 | ecbdata.diff_words->type = o->word_diff; |
4297c0ae | 2062 | ecbdata.diff_words->opt = o; |
80c49c3d TR |
2063 | if (!o->word_regex) |
2064 | o->word_regex = userdiff_word_regex(one); | |
2065 | if (!o->word_regex) | |
2066 | o->word_regex = userdiff_word_regex(two); | |
98a4d87b BSSJ |
2067 | if (!o->word_regex) |
2068 | o->word_regex = diff_word_regex_cfg; | |
2b6a5417 JS |
2069 | if (o->word_regex) { |
2070 | ecbdata.diff_words->word_regex = (regex_t *) | |
2071 | xmalloc(sizeof(regex_t)); | |
2072 | if (regcomp(ecbdata.diff_words->word_regex, | |
bf82940d TR |
2073 | o->word_regex, |
2074 | REG_EXTENDED | REG_NEWLINE)) | |
2b6a5417 JS |
2075 | die ("Invalid regular expression: %s", |
2076 | o->word_regex); | |
2077 | } | |
882749a0 TR |
2078 | for (i = 0; i < ARRAY_SIZE(diff_words_styles); i++) { |
2079 | if (o->word_diff == diff_words_styles[i].type) { | |
2080 | ecbdata.diff_words->style = | |
2081 | &diff_words_styles[i]; | |
2082 | break; | |
2083 | } | |
2084 | } | |
2085 | if (DIFF_OPT_TST(o, COLOR_DIFF)) { | |
2086 | struct diff_words_style *st = ecbdata.diff_words->style; | |
2087 | st->old.color = diff_get_color_opt(o, DIFF_FILE_OLD); | |
2088 | st->new.color = diff_get_color_opt(o, DIFF_FILE_NEW); | |
2089 | st->ctx.color = diff_get_color_opt(o, DIFF_PLAIN); | |
2090 | } | |
c0c77734 | 2091 | } |
8a3f524b | 2092 | xdi_diff_outf(&mf1, &mf2, fn_out_consume, &ecbdata, |
dfea7900 | 2093 | &xpp, &xecfg); |
882749a0 | 2094 | if (o->word_diff) |
f59a59e2 | 2095 | free_diff_words_data(&ecbdata); |
04427ac8 JK |
2096 | if (textconv_one) |
2097 | free(mf1.ptr); | |
2098 | if (textconv_two) | |
2099 | free(mf2.ptr); | |
8cfe5f1c | 2100 | xdiff_clear_find_func(&xecfg); |
6973dcae JH |
2101 | } |
2102 | ||
2103 | free_ab_and_return: | |
3e97c7c6 | 2104 | strbuf_release(&header); |
fc3abdf5 JH |
2105 | diff_free_filespec_data(one); |
2106 | diff_free_filespec_data(two); | |
6973dcae JH |
2107 | free(a_one); |
2108 | free(b_two); | |
2109 | return; | |
2110 | } | |
2111 | ||
2112 | static void builtin_diffstat(const char *name_a, const char *name_b, | |
2113 | struct diff_filespec *one, | |
2114 | struct diff_filespec *two, | |
710158e3 | 2115 | struct diffstat_t *diffstat, |
0d21efa5 | 2116 | struct diff_options *o, |
710158e3 | 2117 | int complete_rewrite) |
6973dcae JH |
2118 | { |
2119 | mmfile_t mf1, mf2; | |
2120 | struct diffstat_file *data; | |
2121 | ||
2122 | data = diffstat_add(diffstat, name_a, name_b); | |
2123 | ||
2124 | if (!one || !two) { | |
2125 | data->is_unmerged = 1; | |
2126 | return; | |
2127 | } | |
ded0abc7 JK |
2128 | |
2129 | if (diff_filespec_is_binary(one) || diff_filespec_is_binary(two)) { | |
ded0abc7 | 2130 | data->is_binary = 1; |
abb371a1 JK |
2131 | data->added = diff_filespec_size(two); |
2132 | data->deleted = diff_filespec_size(one); | |
ded0abc7 JK |
2133 | } |
2134 | ||
2135 | else if (complete_rewrite) { | |
710158e3 JH |
2136 | diff_populate_filespec(one, 0); |
2137 | diff_populate_filespec(two, 0); | |
2138 | data->deleted = count_lines(one->data, one->size); | |
2139 | data->added = count_lines(two->data, two->size); | |
710158e3 | 2140 | } |
6973dcae | 2141 | |
ded0abc7 | 2142 | else { |
6973dcae JH |
2143 | /* Crazy xdl interfaces.. */ |
2144 | xpparam_t xpp; | |
2145 | xdemitconf_t xecfg; | |
6973dcae | 2146 | |
ded0abc7 JK |
2147 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) |
2148 | die("unable to read files to diff"); | |
2149 | ||
9ccd0a88 | 2150 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 2151 | memset(&xecfg, 0, sizeof(xecfg)); |
582aa00b | 2152 | xpp.flags = o->xdl_opts; |
8a3f524b | 2153 | xdi_diff_outf(&mf1, &mf2, diffstat_consume, diffstat, |
dfea7900 | 2154 | &xpp, &xecfg); |
6973dcae | 2155 | } |
fc3abdf5 | 2156 | |
fc3abdf5 JH |
2157 | diff_free_filespec_data(one); |
2158 | diff_free_filespec_data(two); | |
6973dcae JH |
2159 | } |
2160 | ||
88246898 | 2161 | static void builtin_checkdiff(const char *name_a, const char *name_b, |
cd676a51 | 2162 | const char *attr_path, |
5ff10dd6 JH |
2163 | struct diff_filespec *one, |
2164 | struct diff_filespec *two, | |
2165 | struct diff_options *o) | |
88246898 JS |
2166 | { |
2167 | mmfile_t mf1, mf2; | |
2168 | struct checkdiff_t data; | |
2169 | ||
2170 | if (!two) | |
2171 | return; | |
2172 | ||
2173 | memset(&data, 0, sizeof(data)); | |
88246898 JS |
2174 | data.filename = name_b ? name_b : name_a; |
2175 | data.lineno = 0; | |
1ba111d1 | 2176 | data.o = o; |
cd676a51 | 2177 | data.ws_rule = whitespace_rule(attr_path); |
a757c646 | 2178 | data.conflict_marker_size = ll_merge_marker_size(attr_path); |
88246898 JS |
2179 | |
2180 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
2181 | die("unable to read files to diff"); | |
2182 | ||
5ff10dd6 JH |
2183 | /* |
2184 | * All the other codepaths check both sides, but not checking | |
2185 | * the "old" side here is deliberate. We are checking the newly | |
2186 | * introduced changes, and as long as the "new" side is text, we | |
2187 | * can and should check what it introduces. | |
2188 | */ | |
29a3eefd | 2189 | if (diff_filespec_is_binary(two)) |
fc3abdf5 | 2190 | goto free_and_return; |
88246898 JS |
2191 | else { |
2192 | /* Crazy xdl interfaces.. */ | |
2193 | xpparam_t xpp; | |
2194 | xdemitconf_t xecfg; | |
88246898 | 2195 | |
9ccd0a88 | 2196 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 2197 | memset(&xecfg, 0, sizeof(xecfg)); |
c35539eb | 2198 | xecfg.ctxlen = 1; /* at least one context line */ |
582aa00b | 2199 | xpp.flags = 0; |
8a3f524b | 2200 | xdi_diff_outf(&mf1, &mf2, checkdiff_consume, &data, |
dfea7900 | 2201 | &xpp, &xecfg); |
877f23cc | 2202 | |
467babf8 | 2203 | if (data.ws_rule & WS_BLANK_AT_EOF) { |
d68fe26f JH |
2204 | struct emit_callback ecbdata; |
2205 | int blank_at_eof; | |
2206 | ||
2207 | ecbdata.ws_rule = data.ws_rule; | |
2208 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
8837d335 | 2209 | blank_at_eof = ecbdata.blank_at_eof_in_postimage; |
d68fe26f | 2210 | |
467babf8 JH |
2211 | if (blank_at_eof) { |
2212 | static char *err; | |
2213 | if (!err) | |
2214 | err = whitespace_error_string(WS_BLANK_AT_EOF); | |
2215 | fprintf(o->file, "%s:%d: %s.\n", | |
2216 | data.filename, blank_at_eof, err); | |
2217 | data.status = 1; /* report errors */ | |
2218 | } | |
877f23cc | 2219 | } |
88246898 | 2220 | } |
fc3abdf5 JH |
2221 | free_and_return: |
2222 | diff_free_filespec_data(one); | |
2223 | diff_free_filespec_data(two); | |
62c64895 WC |
2224 | if (data.status) |
2225 | DIFF_OPT_SET(o, CHECK_FAILED); | |
88246898 JS |
2226 | } |
2227 | ||
6973dcae JH |
2228 | struct diff_filespec *alloc_filespec(const char *path) |
2229 | { | |
2230 | int namelen = strlen(path); | |
2231 | struct diff_filespec *spec = xmalloc(sizeof(*spec) + namelen + 1); | |
2232 | ||
2233 | memset(spec, 0, sizeof(*spec)); | |
2234 | spec->path = (char *)(spec + 1); | |
2235 | memcpy(spec->path, path, namelen+1); | |
9fb88419 | 2236 | spec->count = 1; |
122aa6f9 | 2237 | spec->is_binary = -1; |
6973dcae JH |
2238 | return spec; |
2239 | } | |
2240 | ||
9fb88419 LT |
2241 | void free_filespec(struct diff_filespec *spec) |
2242 | { | |
2243 | if (!--spec->count) { | |
2244 | diff_free_filespec_data(spec); | |
2245 | free(spec); | |
2246 | } | |
2247 | } | |
2248 | ||
6973dcae JH |
2249 | void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1, |
2250 | unsigned short mode) | |
2251 | { | |
2252 | if (mode) { | |
2253 | spec->mode = canon_mode(mode); | |
e702496e | 2254 | hashcpy(spec->sha1, sha1); |
0bef57ee | 2255 | spec->sha1_valid = !is_null_sha1(sha1); |
6973dcae JH |
2256 | } |
2257 | } | |
2258 | ||
2259 | /* | |
5adf317b | 2260 | * Given a name and sha1 pair, if the index tells us the file in |
6973dcae JH |
2261 | * the work tree has that object contents, return true, so that |
2262 | * prepare_temp_file() does not have to inflate and extract. | |
2263 | */ | |
1510fea7 | 2264 | static int reuse_worktree_file(const char *name, const unsigned char *sha1, int want_file) |
6973dcae JH |
2265 | { |
2266 | struct cache_entry *ce; | |
2267 | struct stat st; | |
2268 | int pos, len; | |
2269 | ||
150115ad JH |
2270 | /* |
2271 | * We do not read the cache ourselves here, because the | |
6973dcae JH |
2272 | * benchmark with my previous version that always reads cache |
2273 | * shows that it makes things worse for diff-tree comparing | |
2274 | * two linux-2.6 kernel trees in an already checked out work | |
2275 | * tree. This is because most diff-tree comparisons deal with | |
2276 | * only a small number of files, while reading the cache is | |
2277 | * expensive for a large project, and its cost outweighs the | |
2278 | * savings we get by not inflating the object to a temporary | |
2279 | * file. Practically, this code only helps when we are used | |
2280 | * by diff-cache --cached, which does read the cache before | |
2281 | * calling us. | |
2282 | */ | |
2283 | if (!active_cache) | |
2284 | return 0; | |
2285 | ||
1510fea7 SP |
2286 | /* We want to avoid the working directory if our caller |
2287 | * doesn't need the data in a normal file, this system | |
2288 | * is rather slow with its stat/open/mmap/close syscalls, | |
2289 | * and the object is contained in a pack file. The pack | |
2290 | * is probably already open and will be faster to obtain | |
2291 | * the data through than the working directory. Loose | |
2292 | * objects however would tend to be slower as they need | |
2293 | * to be individually opened and inflated. | |
2294 | */ | |
cd673c1f | 2295 | if (!FAST_WORKING_DIRECTORY && !want_file && has_sha1_pack(sha1)) |
1510fea7 SP |
2296 | return 0; |
2297 | ||
6973dcae JH |
2298 | len = strlen(name); |
2299 | pos = cache_name_pos(name, len); | |
2300 | if (pos < 0) | |
2301 | return 0; | |
2302 | ce = active_cache[pos]; | |
eadb5831 JH |
2303 | |
2304 | /* | |
2305 | * This is not the sha1 we are looking for, or | |
2306 | * unreusable because it is not a regular file. | |
2307 | */ | |
2308 | if (hashcmp(sha1, ce->sha1) || !S_ISREG(ce->ce_mode)) | |
6973dcae | 2309 | return 0; |
eadb5831 | 2310 | |
150115ad JH |
2311 | /* |
2312 | * If ce is marked as "assume unchanged", there is no | |
2313 | * guarantee that work tree matches what we are looking for. | |
2314 | */ | |
b4d1690d | 2315 | if ((ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) |
150115ad JH |
2316 | return 0; |
2317 | ||
eadb5831 JH |
2318 | /* |
2319 | * If ce matches the file in the work tree, we can reuse it. | |
6973dcae | 2320 | */ |
eadb5831 JH |
2321 | if (ce_uptodate(ce) || |
2322 | (!lstat(name, &st) && !ce_match_stat(ce, &st, 0))) | |
2323 | return 1; | |
2324 | ||
2325 | return 0; | |
6973dcae JH |
2326 | } |
2327 | ||
3afaa72d JH |
2328 | static int populate_from_stdin(struct diff_filespec *s) |
2329 | { | |
f285a2d7 | 2330 | struct strbuf buf = STRBUF_INIT; |
c32f749f | 2331 | size_t size = 0; |
af6eb822 | 2332 | |
f1696ee3 | 2333 | if (strbuf_read(&buf, 0, 0) < 0) |
af6eb822 | 2334 | return error("error while reading from stdin %s", |
3afaa72d | 2335 | strerror(errno)); |
af6eb822 | 2336 | |
3afaa72d | 2337 | s->should_munmap = 0; |
c32f749f RS |
2338 | s->data = strbuf_detach(&buf, &size); |
2339 | s->size = size; | |
3afaa72d JH |
2340 | s->should_free = 1; |
2341 | return 0; | |
2342 | } | |
2343 | ||
04786756 LT |
2344 | static int diff_populate_gitlink(struct diff_filespec *s, int size_only) |
2345 | { | |
2346 | int len; | |
8e08b419 JH |
2347 | char *data = xmalloc(100), *dirty = ""; |
2348 | ||
2349 | /* Are we looking at the work tree? */ | |
85adbf2f | 2350 | if (s->dirty_submodule) |
8e08b419 JH |
2351 | dirty = "-dirty"; |
2352 | ||
04786756 | 2353 | len = snprintf(data, 100, |
8e08b419 | 2354 | "Subproject commit %s%s\n", sha1_to_hex(s->sha1), dirty); |
04786756 LT |
2355 | s->data = data; |
2356 | s->size = len; | |
2357 | s->should_free = 1; | |
2358 | if (size_only) { | |
2359 | s->data = NULL; | |
2360 | free(data); | |
2361 | } | |
2362 | return 0; | |
2363 | } | |
2364 | ||
6973dcae JH |
2365 | /* |
2366 | * While doing rename detection and pickaxe operation, we may need to | |
2367 | * grab the data for the blob (or file) for our own in-core comparison. | |
2368 | * diff_filespec has data and size fields for this purpose. | |
2369 | */ | |
2370 | int diff_populate_filespec(struct diff_filespec *s, int size_only) | |
2371 | { | |
2372 | int err = 0; | |
2373 | if (!DIFF_FILE_VALID(s)) | |
2374 | die("internal error: asking to populate invalid file."); | |
2375 | if (S_ISDIR(s->mode)) | |
2376 | return -1; | |
2377 | ||
6973dcae | 2378 | if (s->data) |
fc3abdf5 | 2379 | return 0; |
04786756 | 2380 | |
6e0b8ed6 JH |
2381 | if (size_only && 0 < s->size) |
2382 | return 0; | |
2383 | ||
302b9282 | 2384 | if (S_ISGITLINK(s->mode)) |
04786756 LT |
2385 | return diff_populate_gitlink(s, size_only); |
2386 | ||
6973dcae | 2387 | if (!s->sha1_valid || |
1510fea7 | 2388 | reuse_worktree_file(s->path, s->sha1, 0)) { |
f285a2d7 | 2389 | struct strbuf buf = STRBUF_INIT; |
6973dcae JH |
2390 | struct stat st; |
2391 | int fd; | |
6c510bee | 2392 | |
3afaa72d JH |
2393 | if (!strcmp(s->path, "-")) |
2394 | return populate_from_stdin(s); | |
2395 | ||
6973dcae JH |
2396 | if (lstat(s->path, &st) < 0) { |
2397 | if (errno == ENOENT) { | |
2398 | err_empty: | |
2399 | err = -1; | |
2400 | empty: | |
d2543b8e | 2401 | s->data = (char *)""; |
6973dcae JH |
2402 | s->size = 0; |
2403 | return err; | |
2404 | } | |
2405 | } | |
dc49cd76 | 2406 | s->size = xsize_t(st.st_size); |
6973dcae JH |
2407 | if (!s->size) |
2408 | goto empty; | |
6973dcae | 2409 | if (S_ISLNK(st.st_mode)) { |
cf219d8c LT |
2410 | struct strbuf sb = STRBUF_INIT; |
2411 | ||
2412 | if (strbuf_readlink(&sb, s->path, s->size)) | |
6973dcae | 2413 | goto err_empty; |
0956a6db RS |
2414 | s->size = sb.len; |
2415 | s->data = strbuf_detach(&sb, NULL); | |
cf219d8c | 2416 | s->should_free = 1; |
6973dcae JH |
2417 | return 0; |
2418 | } | |
cf219d8c LT |
2419 | if (size_only) |
2420 | return 0; | |
6973dcae JH |
2421 | fd = open(s->path, O_RDONLY); |
2422 | if (fd < 0) | |
2423 | goto err_empty; | |
c4712e45 | 2424 | s->data = xmmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0); |
6973dcae | 2425 | close(fd); |
6973dcae | 2426 | s->should_munmap = 1; |
6c510bee LT |
2427 | |
2428 | /* | |
2429 | * Convert from working tree format to canonical git format | |
2430 | */ | |
21e5ad50 | 2431 | if (convert_to_git(s->path, s->data, s->size, &buf, safe_crlf)) { |
c32f749f | 2432 | size_t size = 0; |
6c510bee LT |
2433 | munmap(s->data, s->size); |
2434 | s->should_munmap = 0; | |
c32f749f RS |
2435 | s->data = strbuf_detach(&buf, &size); |
2436 | s->size = size; | |
6c510bee LT |
2437 | s->should_free = 1; |
2438 | } | |
6973dcae JH |
2439 | } |
2440 | else { | |
21666f1a | 2441 | enum object_type type; |
c50c4316 | 2442 | if (size_only) { |
21666f1a | 2443 | type = sha1_object_info(s->sha1, &s->size); |
c50c4316 NP |
2444 | if (type < 0) |
2445 | die("unable to read %s", sha1_to_hex(s->sha1)); | |
2446 | } else { | |
21666f1a | 2447 | s->data = read_sha1_file(s->sha1, &type, &s->size); |
c50c4316 NP |
2448 | if (!s->data) |
2449 | die("unable to read %s", sha1_to_hex(s->sha1)); | |
6973dcae JH |
2450 | s->should_free = 1; |
2451 | } | |
2452 | } | |
2453 | return 0; | |
2454 | } | |
2455 | ||
8ae92e63 | 2456 | void diff_free_filespec_blob(struct diff_filespec *s) |
6973dcae JH |
2457 | { |
2458 | if (s->should_free) | |
2459 | free(s->data); | |
2460 | else if (s->should_munmap) | |
2461 | munmap(s->data, s->size); | |
fc3abdf5 JH |
2462 | |
2463 | if (s->should_free || s->should_munmap) { | |
2464 | s->should_free = s->should_munmap = 0; | |
2465 | s->data = NULL; | |
2466 | } | |
eede7b7d JK |
2467 | } |
2468 | ||
2469 | void diff_free_filespec_data(struct diff_filespec *s) | |
2470 | { | |
8ae92e63 | 2471 | diff_free_filespec_blob(s); |
6973dcae JH |
2472 | free(s->cnt_data); |
2473 | s->cnt_data = NULL; | |
2474 | } | |
2475 | ||
4e218f54 | 2476 | static void prep_temp_blob(const char *path, struct diff_tempfile *temp, |
6973dcae JH |
2477 | void *blob, |
2478 | unsigned long size, | |
2479 | const unsigned char *sha1, | |
2480 | int mode) | |
2481 | { | |
2482 | int fd; | |
4e218f54 | 2483 | struct strbuf buf = STRBUF_INIT; |
003b33a8 DA |
2484 | struct strbuf template = STRBUF_INIT; |
2485 | char *path_dup = xstrdup(path); | |
2486 | const char *base = basename(path_dup); | |
6973dcae | 2487 | |
003b33a8 DA |
2488 | /* Generate "XXXXXX_basename.ext" */ |
2489 | strbuf_addstr(&template, "XXXXXX_"); | |
2490 | strbuf_addstr(&template, base); | |
2491 | ||
2492 | fd = git_mkstemps(temp->tmp_path, PATH_MAX, template.buf, | |
2493 | strlen(base) + 1); | |
6973dcae | 2494 | if (fd < 0) |
d824cbba | 2495 | die_errno("unable to create temp-file"); |
4e218f54 JS |
2496 | if (convert_to_working_tree(path, |
2497 | (const char *)blob, (size_t)size, &buf)) { | |
2498 | blob = buf.buf; | |
2499 | size = buf.len; | |
2500 | } | |
93822c22 | 2501 | if (write_in_full(fd, blob, size) != size) |
0721c314 | 2502 | die_errno("unable to write temp-file"); |
6973dcae JH |
2503 | close(fd); |
2504 | temp->name = temp->tmp_path; | |
2505 | strcpy(temp->hex, sha1_to_hex(sha1)); | |
2506 | temp->hex[40] = 0; | |
2507 | sprintf(temp->mode, "%06o", mode); | |
4e218f54 | 2508 | strbuf_release(&buf); |
003b33a8 DA |
2509 | strbuf_release(&template); |
2510 | free(path_dup); | |
6973dcae JH |
2511 | } |
2512 | ||
479b0ae8 JK |
2513 | static struct diff_tempfile *prepare_temp_file(const char *name, |
2514 | struct diff_filespec *one) | |
6973dcae | 2515 | { |
479b0ae8 JK |
2516 | struct diff_tempfile *temp = claim_diff_tempfile(); |
2517 | ||
6973dcae JH |
2518 | if (!DIFF_FILE_VALID(one)) { |
2519 | not_a_valid_file: | |
2520 | /* A '-' entry produces this for file-2, and | |
2521 | * a '+' entry produces this for file-1. | |
2522 | */ | |
2523 | temp->name = "/dev/null"; | |
2524 | strcpy(temp->hex, "."); | |
2525 | strcpy(temp->mode, "."); | |
479b0ae8 JK |
2526 | return temp; |
2527 | } | |
2528 | ||
2529 | if (!remove_tempfile_installed) { | |
2530 | atexit(remove_tempfile); | |
57b235a4 | 2531 | sigchain_push_common(remove_tempfile_on_signal); |
479b0ae8 | 2532 | remove_tempfile_installed = 1; |
6973dcae JH |
2533 | } |
2534 | ||
2535 | if (!one->sha1_valid || | |
1510fea7 | 2536 | reuse_worktree_file(name, one->sha1, 1)) { |
6973dcae JH |
2537 | struct stat st; |
2538 | if (lstat(name, &st) < 0) { | |
2539 | if (errno == ENOENT) | |
2540 | goto not_a_valid_file; | |
d824cbba | 2541 | die_errno("stat(%s)", name); |
6973dcae JH |
2542 | } |
2543 | if (S_ISLNK(st.st_mode)) { | |
3cd7388d JK |
2544 | struct strbuf sb = STRBUF_INIT; |
2545 | if (strbuf_readlink(&sb, name, st.st_size) < 0) | |
0721c314 | 2546 | die_errno("readlink(%s)", name); |
3cd7388d | 2547 | prep_temp_blob(name, temp, sb.buf, sb.len, |
6973dcae JH |
2548 | (one->sha1_valid ? |
2549 | one->sha1 : null_sha1), | |
2550 | (one->sha1_valid ? | |
2551 | one->mode : S_IFLNK)); | |
3cd7388d | 2552 | strbuf_release(&sb); |
6973dcae JH |
2553 | } |
2554 | else { | |
2555 | /* we can borrow from the file in the work tree */ | |
2556 | temp->name = name; | |
2557 | if (!one->sha1_valid) | |
2558 | strcpy(temp->hex, sha1_to_hex(null_sha1)); | |
2559 | else | |
2560 | strcpy(temp->hex, sha1_to_hex(one->sha1)); | |
2561 | /* Even though we may sometimes borrow the | |
2562 | * contents from the work tree, we always want | |
2563 | * one->mode. mode is trustworthy even when | |
2564 | * !(one->sha1_valid), as long as | |
2565 | * DIFF_FILE_VALID(one). | |
2566 | */ | |
2567 | sprintf(temp->mode, "%06o", one->mode); | |
2568 | } | |
479b0ae8 | 2569 | return temp; |
6973dcae JH |
2570 | } |
2571 | else { | |
2572 | if (diff_populate_filespec(one, 0)) | |
2573 | die("cannot read data blob for %s", one->path); | |
4e218f54 | 2574 | prep_temp_blob(name, temp, one->data, one->size, |
6973dcae JH |
2575 | one->sha1, one->mode); |
2576 | } | |
479b0ae8 | 2577 | return temp; |
6973dcae JH |
2578 | } |
2579 | ||
6973dcae JH |
2580 | /* An external diff command takes: |
2581 | * | |
2582 | * diff-cmd name infile1 infile1-sha1 infile1-mode \ | |
2583 | * infile2 infile2-sha1 infile2-mode [ rename-to ] | |
2584 | * | |
2585 | */ | |
2586 | static void run_external_diff(const char *pgm, | |
2587 | const char *name, | |
2588 | const char *other, | |
2589 | struct diff_filespec *one, | |
2590 | struct diff_filespec *two, | |
2591 | const char *xfrm_msg, | |
2592 | int complete_rewrite) | |
2593 | { | |
2594 | const char *spawn_arg[10]; | |
6973dcae | 2595 | int retval; |
6973dcae JH |
2596 | const char **arg = &spawn_arg[0]; |
2597 | ||
6973dcae | 2598 | if (one && two) { |
479b0ae8 JK |
2599 | struct diff_tempfile *temp_one, *temp_two; |
2600 | const char *othername = (other ? other : name); | |
2601 | temp_one = prepare_temp_file(name, one); | |
2602 | temp_two = prepare_temp_file(othername, two); | |
6973dcae JH |
2603 | *arg++ = pgm; |
2604 | *arg++ = name; | |
479b0ae8 JK |
2605 | *arg++ = temp_one->name; |
2606 | *arg++ = temp_one->hex; | |
2607 | *arg++ = temp_one->mode; | |
2608 | *arg++ = temp_two->name; | |
2609 | *arg++ = temp_two->hex; | |
2610 | *arg++ = temp_two->mode; | |
6973dcae JH |
2611 | if (other) { |
2612 | *arg++ = other; | |
2613 | *arg++ = xfrm_msg; | |
2614 | } | |
2615 | } else { | |
2616 | *arg++ = pgm; | |
2617 | *arg++ = name; | |
2618 | } | |
2619 | *arg = NULL; | |
d5535ec7 | 2620 | fflush(NULL); |
7ed7fac4 | 2621 | retval = run_command_v_opt(spawn_arg, RUN_USING_SHELL); |
6973dcae JH |
2622 | remove_tempfile(); |
2623 | if (retval) { | |
2624 | fprintf(stderr, "external diff died, stopping at %s.\n", name); | |
2625 | exit(1); | |
2626 | } | |
2627 | } | |
2628 | ||
b67b9612 JH |
2629 | static int similarity_index(struct diff_filepair *p) |
2630 | { | |
2631 | return p->score * 100 / MAX_SCORE; | |
2632 | } | |
2633 | ||
2634 | static void fill_metainfo(struct strbuf *msg, | |
2635 | const char *name, | |
2636 | const char *other, | |
2637 | struct diff_filespec *one, | |
2638 | struct diff_filespec *two, | |
2639 | struct diff_options *o, | |
37466447 | 2640 | struct diff_filepair *p, |
5977744d | 2641 | int *must_show_header, |
37466447 | 2642 | int use_color) |
b67b9612 | 2643 | { |
37466447 BW |
2644 | const char *set = diff_get_color(use_color, DIFF_METAINFO); |
2645 | const char *reset = diff_get_color(use_color, DIFF_RESET); | |
7be57610 BY |
2646 | struct strbuf *msgbuf; |
2647 | char *line_prefix = ""; | |
2648 | ||
296c6bb2 | 2649 | *must_show_header = 1; |
7be57610 BY |
2650 | if (o->output_prefix) { |
2651 | msgbuf = o->output_prefix(o, o->output_prefix_data); | |
2652 | line_prefix = msgbuf->buf; | |
2653 | } | |
b67b9612 JH |
2654 | strbuf_init(msg, PATH_MAX * 2 + 300); |
2655 | switch (p->status) { | |
2656 | case DIFF_STATUS_COPIED: | |
98ad90fb JH |
2657 | strbuf_addf(msg, "%s%ssimilarity index %d%%", |
2658 | line_prefix, set, similarity_index(p)); | |
2659 | strbuf_addf(msg, "%s\n%s%scopy from ", | |
2660 | reset, line_prefix, set); | |
b67b9612 | 2661 | quote_c_style(name, msg, NULL, 0); |
98ad90fb | 2662 | strbuf_addf(msg, "%s\n%s%scopy to ", reset, line_prefix, set); |
b67b9612 | 2663 | quote_c_style(other, msg, NULL, 0); |
37466447 | 2664 | strbuf_addf(msg, "%s\n", reset); |
b67b9612 JH |
2665 | break; |
2666 | case DIFF_STATUS_RENAMED: | |
98ad90fb JH |
2667 | strbuf_addf(msg, "%s%ssimilarity index %d%%", |
2668 | line_prefix, set, similarity_index(p)); | |
2669 | strbuf_addf(msg, "%s\n%s%srename from ", | |
2670 | reset, line_prefix, set); | |
b67b9612 | 2671 | quote_c_style(name, msg, NULL, 0); |
98ad90fb JH |
2672 | strbuf_addf(msg, "%s\n%s%srename to ", |
2673 | reset, line_prefix, set); | |
b67b9612 | 2674 | quote_c_style(other, msg, NULL, 0); |
37466447 | 2675 | strbuf_addf(msg, "%s\n", reset); |
b67b9612 JH |
2676 | break; |
2677 | case DIFF_STATUS_MODIFIED: | |
2678 | if (p->score) { | |
98ad90fb JH |
2679 | strbuf_addf(msg, "%s%sdissimilarity index %d%%%s\n", |
2680 | line_prefix, | |
37466447 | 2681 | set, similarity_index(p), reset); |
b67b9612 JH |
2682 | break; |
2683 | } | |
2684 | /* fallthru */ | |
2685 | default: | |
296c6bb2 | 2686 | *must_show_header = 0; |
b67b9612 JH |
2687 | } |
2688 | if (one && two && hashcmp(one->sha1, two->sha1)) { | |
2689 | int abbrev = DIFF_OPT_TST(o, FULL_INDEX) ? 40 : DEFAULT_ABBREV; | |
2690 | ||
2691 | if (DIFF_OPT_TST(o, BINARY)) { | |
2692 | mmfile_t mf; | |
2693 | if ((!fill_mmfile(&mf, one) && diff_filespec_is_binary(one)) || | |
2694 | (!fill_mmfile(&mf, two) && diff_filespec_is_binary(two))) | |
2695 | abbrev = 40; | |
2696 | } | |
e13f38a3 | 2697 | strbuf_addf(msg, "%s%sindex %s..", line_prefix, set, |
3e5a188f JH |
2698 | find_unique_abbrev(one->sha1, abbrev)); |
2699 | strbuf_addstr(msg, find_unique_abbrev(two->sha1, abbrev)); | |
b67b9612 JH |
2700 | if (one->mode == two->mode) |
2701 | strbuf_addf(msg, " %06o", one->mode); | |
37466447 | 2702 | strbuf_addf(msg, "%s\n", reset); |
b67b9612 | 2703 | } |
b67b9612 JH |
2704 | } |
2705 | ||
6973dcae JH |
2706 | static void run_diff_cmd(const char *pgm, |
2707 | const char *name, | |
2708 | const char *other, | |
cd676a51 | 2709 | const char *attr_path, |
6973dcae JH |
2710 | struct diff_filespec *one, |
2711 | struct diff_filespec *two, | |
b67b9612 | 2712 | struct strbuf *msg, |
051308f6 | 2713 | struct diff_options *o, |
b67b9612 | 2714 | struct diff_filepair *p) |
6973dcae | 2715 | { |
b67b9612 JH |
2716 | const char *xfrm_msg = NULL; |
2717 | int complete_rewrite = (p->status == DIFF_STATUS_MODIFIED) && p->score; | |
296c6bb2 | 2718 | int must_show_header = 0; |
b67b9612 | 2719 | |
8f67f8ae | 2720 | if (!DIFF_OPT_TST(o, ALLOW_EXTERNAL)) |
f1af60bd JH |
2721 | pgm = NULL; |
2722 | else { | |
be58e70d JK |
2723 | struct userdiff_driver *drv = userdiff_find_by_path(attr_path); |
2724 | if (drv && drv->external) | |
2725 | pgm = drv->external; | |
f1af60bd JH |
2726 | } |
2727 | ||
37466447 BW |
2728 | if (msg) { |
2729 | /* | |
2730 | * don't use colors when the header is intended for an | |
2731 | * external diff driver | |
2732 | */ | |
2733 | fill_metainfo(msg, name, other, one, two, o, p, | |
5977744d | 2734 | &must_show_header, |
37466447 BW |
2735 | DIFF_OPT_TST(o, COLOR_DIFF) && !pgm); |
2736 | xfrm_msg = msg->len ? msg->buf : NULL; | |
2737 | } | |
2738 | ||
6973dcae JH |
2739 | if (pgm) { |
2740 | run_external_diff(pgm, name, other, one, two, xfrm_msg, | |
2741 | complete_rewrite); | |
2742 | return; | |
2743 | } | |
2744 | if (one && two) | |
2745 | builtin_diff(name, other ? other : name, | |
296c6bb2 CC |
2746 | one, two, xfrm_msg, must_show_header, |
2747 | o, complete_rewrite); | |
6973dcae | 2748 | else |
c0c77734 | 2749 | fprintf(o->file, "* Unmerged path %s\n", name); |
6973dcae JH |
2750 | } |
2751 | ||
2752 | static void diff_fill_sha1_info(struct diff_filespec *one) | |
2753 | { | |
2754 | if (DIFF_FILE_VALID(one)) { | |
2755 | if (!one->sha1_valid) { | |
2756 | struct stat st; | |
5332b2af JS |
2757 | if (!strcmp(one->path, "-")) { |
2758 | hashcpy(one->sha1, null_sha1); | |
2759 | return; | |
2760 | } | |
6973dcae | 2761 | if (lstat(one->path, &st) < 0) |
0721c314 | 2762 | die_errno("stat '%s'", one->path); |
6973dcae | 2763 | if (index_path(one->sha1, one->path, &st, 0)) |
d7530708 | 2764 | die("cannot hash %s", one->path); |
6973dcae JH |
2765 | } |
2766 | } | |
2767 | else | |
e702496e | 2768 | hashclr(one->sha1); |
6973dcae JH |
2769 | } |
2770 | ||
cd676a51 JH |
2771 | static void strip_prefix(int prefix_length, const char **namep, const char **otherp) |
2772 | { | |
2773 | /* Strip the prefix but do not molest /dev/null and absolute paths */ | |
d8faea9d | 2774 | if (*namep && **namep != '/') { |
cd676a51 | 2775 | *namep += prefix_length; |
d8faea9d JN |
2776 | if (**namep == '/') |
2777 | ++*namep; | |
2778 | } | |
2779 | if (*otherp && **otherp != '/') { | |
cd676a51 | 2780 | *otherp += prefix_length; |
d8faea9d JN |
2781 | if (**otherp == '/') |
2782 | ++*otherp; | |
2783 | } | |
cd676a51 JH |
2784 | } |
2785 | ||
6973dcae JH |
2786 | static void run_diff(struct diff_filepair *p, struct diff_options *o) |
2787 | { | |
2788 | const char *pgm = external_diff(); | |
663af342 | 2789 | struct strbuf msg; |
663af342 PH |
2790 | struct diff_filespec *one = p->one; |
2791 | struct diff_filespec *two = p->two; | |
6973dcae JH |
2792 | const char *name; |
2793 | const char *other; | |
cd676a51 | 2794 | const char *attr_path; |
663af342 | 2795 | |
cd676a51 JH |
2796 | name = p->one->path; |
2797 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
2798 | attr_path = name; | |
2799 | if (o->prefix_length) | |
2800 | strip_prefix(o->prefix_length, &name, &other); | |
6973dcae JH |
2801 | |
2802 | if (DIFF_PAIR_UNMERGED(p)) { | |
cd676a51 | 2803 | run_diff_cmd(pgm, name, NULL, attr_path, |
b67b9612 | 2804 | NULL, NULL, NULL, o, p); |
6973dcae JH |
2805 | return; |
2806 | } | |
2807 | ||
6973dcae JH |
2808 | diff_fill_sha1_info(one); |
2809 | diff_fill_sha1_info(two); | |
2810 | ||
6973dcae JH |
2811 | if (!pgm && |
2812 | DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) && | |
2813 | (S_IFMT & one->mode) != (S_IFMT & two->mode)) { | |
b67b9612 JH |
2814 | /* |
2815 | * a filepair that changes between file and symlink | |
6973dcae JH |
2816 | * needs to be split into deletion and creation. |
2817 | */ | |
2818 | struct diff_filespec *null = alloc_filespec(two->path); | |
cd676a51 | 2819 | run_diff_cmd(NULL, name, other, attr_path, |
b67b9612 | 2820 | one, null, &msg, o, p); |
6973dcae | 2821 | free(null); |
b67b9612 JH |
2822 | strbuf_release(&msg); |
2823 | ||
6973dcae | 2824 | null = alloc_filespec(one->path); |
cd676a51 | 2825 | run_diff_cmd(NULL, name, other, attr_path, |
b67b9612 | 2826 | null, two, &msg, o, p); |
6973dcae JH |
2827 | free(null); |
2828 | } | |
2829 | else | |
cd676a51 | 2830 | run_diff_cmd(pgm, name, other, attr_path, |
b67b9612 | 2831 | one, two, &msg, o, p); |
6973dcae | 2832 | |
663af342 | 2833 | strbuf_release(&msg); |
6973dcae JH |
2834 | } |
2835 | ||
2836 | static void run_diffstat(struct diff_filepair *p, struct diff_options *o, | |
2837 | struct diffstat_t *diffstat) | |
2838 | { | |
2839 | const char *name; | |
2840 | const char *other; | |
710158e3 | 2841 | int complete_rewrite = 0; |
6973dcae JH |
2842 | |
2843 | if (DIFF_PAIR_UNMERGED(p)) { | |
2844 | /* unmerged */ | |
0d21efa5 | 2845 | builtin_diffstat(p->one->path, NULL, NULL, NULL, diffstat, o, 0); |
6973dcae JH |
2846 | return; |
2847 | } | |
2848 | ||
2849 | name = p->one->path; | |
2850 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
2851 | ||
cd676a51 JH |
2852 | if (o->prefix_length) |
2853 | strip_prefix(o->prefix_length, &name, &other); | |
2854 | ||
6973dcae JH |
2855 | diff_fill_sha1_info(p->one); |
2856 | diff_fill_sha1_info(p->two); | |
2857 | ||
710158e3 JH |
2858 | if (p->status == DIFF_STATUS_MODIFIED && p->score) |
2859 | complete_rewrite = 1; | |
0d21efa5 | 2860 | builtin_diffstat(name, other, p->one, p->two, diffstat, o, complete_rewrite); |
6973dcae JH |
2861 | } |
2862 | ||
88246898 JS |
2863 | static void run_checkdiff(struct diff_filepair *p, struct diff_options *o) |
2864 | { | |
2865 | const char *name; | |
2866 | const char *other; | |
cd676a51 | 2867 | const char *attr_path; |
88246898 JS |
2868 | |
2869 | if (DIFF_PAIR_UNMERGED(p)) { | |
2870 | /* unmerged */ | |
2871 | return; | |
2872 | } | |
2873 | ||
2874 | name = p->one->path; | |
2875 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
cd676a51 JH |
2876 | attr_path = other ? other : name; |
2877 | ||
2878 | if (o->prefix_length) | |
2879 | strip_prefix(o->prefix_length, &name, &other); | |
88246898 JS |
2880 | |
2881 | diff_fill_sha1_info(p->one); | |
2882 | diff_fill_sha1_info(p->two); | |
2883 | ||
cd676a51 | 2884 | builtin_checkdiff(name, other, attr_path, p->one, p->two, o); |
88246898 JS |
2885 | } |
2886 | ||
6973dcae JH |
2887 | void diff_setup(struct diff_options *options) |
2888 | { | |
be4f2b40 | 2889 | memcpy(options, &default_diff_options, sizeof(*options)); |
c0c77734 DB |
2890 | |
2891 | options->file = stdout; | |
2892 | ||
6973dcae JH |
2893 | options->line_termination = '\n'; |
2894 | options->break_opt = -1; | |
2895 | options->rename_limit = -1; | |
7df7c019 | 2896 | options->dirstat_percent = 3; |
ee1e5412 | 2897 | options->context = 3; |
6973dcae JH |
2898 | |
2899 | options->change = diff_change; | |
2900 | options->add_remove = diff_addremove; | |
6b2f2d98 | 2901 | if (diff_use_color_default > 0) |
8f67f8ae | 2902 | DIFF_OPT_SET(options, COLOR_DIFF); |
b68ea12e | 2903 | options->detect_rename = diff_detect_rename_default; |
eab9a40b | 2904 | |
f89504dd EC |
2905 | if (diff_no_prefix) { |
2906 | options->a_prefix = options->b_prefix = ""; | |
2907 | } else if (!diff_mnemonic_prefix) { | |
a5a818ee JH |
2908 | options->a_prefix = "a/"; |
2909 | options->b_prefix = "b/"; | |
2910 | } | |
6973dcae JH |
2911 | } |
2912 | ||
2913 | int diff_setup_done(struct diff_options *options) | |
2914 | { | |
d7de00f7 TH |
2915 | int count = 0; |
2916 | ||
2917 | if (options->output_format & DIFF_FORMAT_NAME) | |
2918 | count++; | |
2919 | if (options->output_format & DIFF_FORMAT_NAME_STATUS) | |
2920 | count++; | |
2921 | if (options->output_format & DIFF_FORMAT_CHECKDIFF) | |
2922 | count++; | |
2923 | if (options->output_format & DIFF_FORMAT_NO_OUTPUT) | |
2924 | count++; | |
2925 | if (count > 1) | |
2926 | die("--name-only, --name-status, --check and -s are mutually exclusive"); | |
2927 | ||
f245194f JH |
2928 | /* |
2929 | * Most of the time we can say "there are changes" | |
2930 | * only by checking if there are changed paths, but | |
2931 | * --ignore-whitespace* options force us to look | |
97bf2a08 | 2932 | * inside contents. |
f245194f JH |
2933 | */ |
2934 | ||
2935 | if (DIFF_XDL_TST(options, IGNORE_WHITESPACE) || | |
2936 | DIFF_XDL_TST(options, IGNORE_WHITESPACE_CHANGE) || | |
2937 | DIFF_XDL_TST(options, IGNORE_WHITESPACE_AT_EOL)) | |
2938 | DIFF_OPT_SET(options, DIFF_FROM_CONTENTS); | |
2939 | else | |
2940 | DIFF_OPT_CLR(options, DIFF_FROM_CONTENTS); | |
2941 | ||
8f67f8ae | 2942 | if (DIFF_OPT_TST(options, FIND_COPIES_HARDER)) |
03b9d560 JH |
2943 | options->detect_rename = DIFF_DETECT_COPY; |
2944 | ||
cd676a51 JH |
2945 | if (!DIFF_OPT_TST(options, RELATIVE_NAME)) |
2946 | options->prefix = NULL; | |
2947 | if (options->prefix) | |
2948 | options->prefix_length = strlen(options->prefix); | |
2949 | else | |
2950 | options->prefix_length = 0; | |
2951 | ||
c6744349 TH |
2952 | if (options->output_format & (DIFF_FORMAT_NAME | |
2953 | DIFF_FORMAT_NAME_STATUS | | |
2954 | DIFF_FORMAT_CHECKDIFF | | |
2955 | DIFF_FORMAT_NO_OUTPUT)) | |
2956 | options->output_format &= ~(DIFF_FORMAT_RAW | | |
74e2abe5 | 2957 | DIFF_FORMAT_NUMSTAT | |
c6744349 | 2958 | DIFF_FORMAT_DIFFSTAT | |
ebd124c6 | 2959 | DIFF_FORMAT_SHORTSTAT | |
7df7c019 | 2960 | DIFF_FORMAT_DIRSTAT | |
c6744349 TH |
2961 | DIFF_FORMAT_SUMMARY | |
2962 | DIFF_FORMAT_PATCH); | |
2963 | ||
6973dcae JH |
2964 | /* |
2965 | * These cases always need recursive; we do not drop caller-supplied | |
2966 | * recursive bits for other formats here. | |
2967 | */ | |
c6744349 | 2968 | if (options->output_format & (DIFF_FORMAT_PATCH | |
74e2abe5 | 2969 | DIFF_FORMAT_NUMSTAT | |
c6744349 | 2970 | DIFF_FORMAT_DIFFSTAT | |
ebd124c6 | 2971 | DIFF_FORMAT_SHORTSTAT | |
7df7c019 | 2972 | DIFF_FORMAT_DIRSTAT | |
d7014dc0 | 2973 | DIFF_FORMAT_SUMMARY | |
c6744349 | 2974 | DIFF_FORMAT_CHECKDIFF)) |
8f67f8ae | 2975 | DIFF_OPT_SET(options, RECURSIVE); |
5e363541 | 2976 | /* |
3969cf7d | 2977 | * Also pickaxe would not work very well if you do not say recursive |
5e363541 | 2978 | */ |
3969cf7d | 2979 | if (options->pickaxe) |
8f67f8ae | 2980 | DIFF_OPT_SET(options, RECURSIVE); |
ae6d5c1b JL |
2981 | /* |
2982 | * When patches are generated, submodules diffed against the work tree | |
2983 | * must be checked for dirtiness too so it can be shown in the output | |
2984 | */ | |
2985 | if (options->output_format & DIFF_FORMAT_PATCH) | |
2986 | DIFF_OPT_SET(options, DIRTY_SUBMODULES); | |
5e363541 | 2987 | |
6973dcae JH |
2988 | if (options->detect_rename && options->rename_limit < 0) |
2989 | options->rename_limit = diff_rename_limit_default; | |
2990 | if (options->setup & DIFF_SETUP_USE_CACHE) { | |
2991 | if (!active_cache) | |
2992 | /* read-cache does not die even when it fails | |
2993 | * so it is safe for us to do this here. Also | |
2994 | * it does not smudge active_cache or active_nr | |
2995 | * when it fails, so we do not have to worry about | |
2996 | * cleaning it up ourselves either. | |
2997 | */ | |
2998 | read_cache(); | |
2999 | } | |
6973dcae JH |
3000 | if (options->abbrev <= 0 || 40 < options->abbrev) |
3001 | options->abbrev = 40; /* full */ | |
3002 | ||
68aacb2f JH |
3003 | /* |
3004 | * It does not make sense to show the first hit we happened | |
3005 | * to have found. It does not make sense not to return with | |
3006 | * exit code in such a case either. | |
3007 | */ | |
90b19941 | 3008 | if (DIFF_OPT_TST(options, QUICK)) { |
68aacb2f | 3009 | options->output_format = DIFF_FORMAT_NO_OUTPUT; |
8f67f8ae | 3010 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); |
68aacb2f JH |
3011 | } |
3012 | ||
6973dcae JH |
3013 | return 0; |
3014 | } | |
3015 | ||
d2543b8e | 3016 | static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val) |
ee1e5412 LT |
3017 | { |
3018 | char c, *eq; | |
3019 | int len; | |
3020 | ||
3021 | if (*arg != '-') | |
3022 | return 0; | |
3023 | c = *++arg; | |
3024 | if (!c) | |
3025 | return 0; | |
3026 | if (c == arg_short) { | |
3027 | c = *++arg; | |
3028 | if (!c) | |
3029 | return 1; | |
3030 | if (val && isdigit(c)) { | |
3031 | char *end; | |
3032 | int n = strtoul(arg, &end, 10); | |
3033 | if (*end) | |
3034 | return 0; | |
3035 | *val = n; | |
3036 | return 1; | |
3037 | } | |
3038 | return 0; | |
3039 | } | |
3040 | if (c != '-') | |
3041 | return 0; | |
3042 | arg++; | |
3043 | eq = strchr(arg, '='); | |
3044 | if (eq) | |
3045 | len = eq - arg; | |
3046 | else | |
3047 | len = strlen(arg); | |
3048 | if (!len || strncmp(arg, arg_long, len)) | |
3049 | return 0; | |
3050 | if (eq) { | |
3051 | int n; | |
3052 | char *end; | |
3053 | if (!isdigit(*++eq)) | |
3054 | return 0; | |
3055 | n = strtoul(eq, &end, 10); | |
3056 | if (*end) | |
3057 | return 0; | |
3058 | *val = n; | |
3059 | } | |
3060 | return 1; | |
3061 | } | |
3062 | ||
16befb8b JH |
3063 | static int diff_scoreopt_parse(const char *opt); |
3064 | ||
dea007fb MM |
3065 | static inline int short_opt(char opt, const char **argv, |
3066 | const char **optarg) | |
3067 | { | |
3068 | const char *arg = argv[0]; | |
3069 | if (arg[0] != '-' || arg[1] != opt) | |
3070 | return 0; | |
3071 | if (arg[2] != '\0') { | |
3072 | *optarg = arg + 2; | |
3073 | return 1; | |
3074 | } | |
3075 | if (!argv[1]) | |
3076 | die("Option '%c' requires a value", opt); | |
3077 | *optarg = argv[1]; | |
3078 | return 2; | |
3079 | } | |
3080 | ||
3081 | int parse_long_opt(const char *opt, const char **argv, | |
3082 | const char **optarg) | |
3083 | { | |
3084 | const char *arg = argv[0]; | |
3085 | if (arg[0] != '-' || arg[1] != '-') | |
3086 | return 0; | |
3087 | arg += strlen("--"); | |
3088 | if (prefixcmp(arg, opt)) | |
3089 | return 0; | |
3090 | arg += strlen(opt); | |
3091 | if (*arg == '=') { /* sticked form: --option=value */ | |
3092 | *optarg = arg + 1; | |
3093 | return 1; | |
3094 | } | |
3095 | if (*arg != '\0') | |
3096 | return 0; | |
3097 | /* separate form: --option value */ | |
3098 | if (!argv[1]) | |
3099 | die("Option '--%s' requires a value", opt); | |
3100 | *optarg = argv[1]; | |
3101 | return 2; | |
3102 | } | |
3103 | ||
4d7f7a4a JN |
3104 | static int stat_opt(struct diff_options *options, const char **av) |
3105 | { | |
3106 | const char *arg = av[0]; | |
3107 | char *end; | |
3108 | int width = options->stat_width; | |
3109 | int name_width = options->stat_name_width; | |
1e57208e | 3110 | int argcount = 1; |
4d7f7a4a JN |
3111 | |
3112 | arg += strlen("--stat"); | |
3113 | end = (char *)arg; | |
3114 | ||
3115 | switch (*arg) { | |
3116 | case '-': | |
1e57208e MM |
3117 | if (!prefixcmp(arg, "-width")) { |
3118 | arg += strlen("-width"); | |
3119 | if (*arg == '=') | |
3120 | width = strtoul(arg + 1, &end, 10); | |
3121 | else if (!*arg && !av[1]) | |
3122 | die("Option '--stat-width' requires a value"); | |
3123 | else if (!*arg) { | |
3124 | width = strtoul(av[1], &end, 10); | |
3125 | argcount = 2; | |
3126 | } | |
3127 | } else if (!prefixcmp(arg, "-name-width")) { | |
3128 | arg += strlen("-name-width"); | |
3129 | if (*arg == '=') | |
3130 | name_width = strtoul(arg + 1, &end, 10); | |
3131 | else if (!*arg && !av[1]) | |
3132 | die("Option '--stat-name-width' requires a value"); | |
3133 | else if (!*arg) { | |
3134 | name_width = strtoul(av[1], &end, 10); | |
3135 | argcount = 2; | |
3136 | } | |
3137 | } | |
4d7f7a4a JN |
3138 | break; |
3139 | case '=': | |
3140 | width = strtoul(arg+1, &end, 10); | |
3141 | if (*end == ',') | |
3142 | name_width = strtoul(end+1, &end, 10); | |
3143 | } | |
3144 | ||
3145 | /* Important! This checks all the error cases! */ | |
3146 | if (*end) | |
3147 | return 0; | |
3148 | options->output_format |= DIFF_FORMAT_DIFFSTAT; | |
3149 | options->stat_name_width = name_width; | |
3150 | options->stat_width = width; | |
1e57208e | 3151 | return argcount; |
4d7f7a4a JN |
3152 | } |
3153 | ||
6973dcae JH |
3154 | int diff_opt_parse(struct diff_options *options, const char **av, int ac) |
3155 | { | |
3156 | const char *arg = av[0]; | |
dea007fb MM |
3157 | const char *optarg; |
3158 | int argcount; | |
d054680c PH |
3159 | |
3160 | /* Output format options */ | |
1c9eecff | 3161 | if (!strcmp(arg, "-p") || !strcmp(arg, "-u") || !strcmp(arg, "--patch")) |
c6744349 | 3162 | options->output_format |= DIFF_FORMAT_PATCH; |
ee1e5412 | 3163 | else if (opt_arg(arg, 'U', "unified", &options->context)) |
c6744349 | 3164 | options->output_format |= DIFF_FORMAT_PATCH; |
a610786f TH |
3165 | else if (!strcmp(arg, "--raw")) |
3166 | options->output_format |= DIFF_FORMAT_RAW; | |
8f67f8ae | 3167 | else if (!strcmp(arg, "--patch-with-raw")) |
c6744349 | 3168 | options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_RAW; |
8f67f8ae | 3169 | else if (!strcmp(arg, "--numstat")) |
74e2abe5 | 3170 | options->output_format |= DIFF_FORMAT_NUMSTAT; |
8f67f8ae | 3171 | else if (!strcmp(arg, "--shortstat")) |
ebd124c6 | 3172 | options->output_format |= DIFF_FORMAT_SHORTSTAT; |
7df7c019 LT |
3173 | else if (opt_arg(arg, 'X', "dirstat", &options->dirstat_percent)) |
3174 | options->output_format |= DIFF_FORMAT_DIRSTAT; | |
f88d225f JH |
3175 | else if (!strcmp(arg, "--cumulative")) { |
3176 | options->output_format |= DIFF_FORMAT_DIRSTAT; | |
3177 | DIFF_OPT_SET(options, DIRSTAT_CUMULATIVE); | |
fd33777b HO |
3178 | } else if (opt_arg(arg, 0, "dirstat-by-file", |
3179 | &options->dirstat_percent)) { | |
3180 | options->output_format |= DIFF_FORMAT_DIRSTAT; | |
3181 | DIFF_OPT_SET(options, DIRSTAT_BY_FILE); | |
f88d225f | 3182 | } |
d054680c PH |
3183 | else if (!strcmp(arg, "--check")) |
3184 | options->output_format |= DIFF_FORMAT_CHECKDIFF; | |
3185 | else if (!strcmp(arg, "--summary")) | |
3186 | options->output_format |= DIFF_FORMAT_SUMMARY; | |
3187 | else if (!strcmp(arg, "--patch-with-stat")) | |
3188 | options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_DIFFSTAT; | |
3189 | else if (!strcmp(arg, "--name-only")) | |
3190 | options->output_format |= DIFF_FORMAT_NAME; | |
3191 | else if (!strcmp(arg, "--name-status")) | |
3192 | options->output_format |= DIFF_FORMAT_NAME_STATUS; | |
3193 | else if (!strcmp(arg, "-s")) | |
3194 | options->output_format |= DIFF_FORMAT_NO_OUTPUT; | |
4d7f7a4a JN |
3195 | else if (!prefixcmp(arg, "--stat")) |
3196 | /* --stat, --stat-width, or --stat-name-width */ | |
3197 | return stat_opt(options, av); | |
d054680c PH |
3198 | |
3199 | /* renames options */ | |
37ab5156 KB |
3200 | else if (!prefixcmp(arg, "-B") || !prefixcmp(arg, "--break-rewrites=") || |
3201 | !strcmp(arg, "--break-rewrites")) { | |
8f67f8ae | 3202 | if ((options->break_opt = diff_scoreopt_parse(arg)) == -1) |
07cd7265 | 3203 | return error("invalid argument to -B: %s", arg+2); |
6973dcae | 3204 | } |
f611ddc7 YD |
3205 | else if (!prefixcmp(arg, "-M") || !prefixcmp(arg, "--find-renames=") || |
3206 | !strcmp(arg, "--find-renames")) { | |
8f67f8ae | 3207 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) |
07cd7265 | 3208 | return error("invalid argument to -M: %s", arg+2); |
6973dcae JH |
3209 | options->detect_rename = DIFF_DETECT_RENAME; |
3210 | } | |
f611ddc7 YD |
3211 | else if (!prefixcmp(arg, "-C") || !prefixcmp(arg, "--find-copies=") || |
3212 | !strcmp(arg, "--find-copies")) { | |
ca6c0970 | 3213 | if (options->detect_rename == DIFF_DETECT_COPY) |
8f67f8ae PH |
3214 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); |
3215 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) | |
07cd7265 | 3216 | return error("invalid argument to -C: %s", arg+2); |
6973dcae JH |
3217 | options->detect_rename = DIFF_DETECT_COPY; |
3218 | } | |
d054680c PH |
3219 | else if (!strcmp(arg, "--no-renames")) |
3220 | options->detect_rename = 0; | |
cd676a51 JH |
3221 | else if (!strcmp(arg, "--relative")) |
3222 | DIFF_OPT_SET(options, RELATIVE_NAME); | |
c0cb4a06 JH |
3223 | else if (!prefixcmp(arg, "--relative=")) { |
3224 | DIFF_OPT_SET(options, RELATIVE_NAME); | |
3225 | options->prefix = arg + 11; | |
3226 | } | |
d054680c PH |
3227 | |
3228 | /* xdiff options */ | |
3229 | else if (!strcmp(arg, "-w") || !strcmp(arg, "--ignore-all-space")) | |
628d5c2b | 3230 | DIFF_XDL_SET(options, IGNORE_WHITESPACE); |
d054680c | 3231 | else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change")) |
628d5c2b | 3232 | DIFF_XDL_SET(options, IGNORE_WHITESPACE_CHANGE); |
d054680c | 3233 | else if (!strcmp(arg, "--ignore-space-at-eol")) |
628d5c2b | 3234 | DIFF_XDL_SET(options, IGNORE_WHITESPACE_AT_EOL); |
34292bdd | 3235 | else if (!strcmp(arg, "--patience")) |
628d5c2b | 3236 | DIFF_XDL_SET(options, PATIENCE_DIFF); |
d054680c PH |
3237 | |
3238 | /* flags options */ | |
3239 | else if (!strcmp(arg, "--binary")) { | |
3240 | options->output_format |= DIFF_FORMAT_PATCH; | |
3241 | DIFF_OPT_SET(options, BINARY); | |
3242 | } | |
3243 | else if (!strcmp(arg, "--full-index")) | |
3244 | DIFF_OPT_SET(options, FULL_INDEX); | |
3245 | else if (!strcmp(arg, "-a") || !strcmp(arg, "--text")) | |
3246 | DIFF_OPT_SET(options, TEXT); | |
3247 | else if (!strcmp(arg, "-R")) | |
3248 | DIFF_OPT_SET(options, REVERSE_DIFF); | |
6973dcae | 3249 | else if (!strcmp(arg, "--find-copies-harder")) |
8f67f8ae | 3250 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); |
750f7b66 | 3251 | else if (!strcmp(arg, "--follow")) |
8f67f8ae | 3252 | DIFF_OPT_SET(options, FOLLOW_RENAMES); |
cd112cef | 3253 | else if (!strcmp(arg, "--color")) |
8f67f8ae | 3254 | DIFF_OPT_SET(options, COLOR_DIFF); |
73e9da01 ML |
3255 | else if (!prefixcmp(arg, "--color=")) { |
3256 | int value = git_config_colorbool(NULL, arg+8, -1); | |
3257 | if (value == 0) | |
3258 | DIFF_OPT_CLR(options, COLOR_DIFF); | |
3259 | else if (value > 0) | |
3260 | DIFF_OPT_SET(options, COLOR_DIFF); | |
3261 | else | |
3262 | return error("option `color' expects \"always\", \"auto\", or \"never\""); | |
3263 | } | |
fef88bb0 | 3264 | else if (!strcmp(arg, "--no-color")) |
8f67f8ae | 3265 | DIFF_OPT_CLR(options, COLOR_DIFF); |
628d5c2b KC |
3266 | else if (!strcmp(arg, "--color-words")) { |
3267 | DIFF_OPT_SET(options, COLOR_DIFF); | |
882749a0 | 3268 | options->word_diff = DIFF_WORDS_COLOR; |
628d5c2b | 3269 | } |
2b6a5417 | 3270 | else if (!prefixcmp(arg, "--color-words=")) { |
628d5c2b | 3271 | DIFF_OPT_SET(options, COLOR_DIFF); |
882749a0 | 3272 | options->word_diff = DIFF_WORDS_COLOR; |
2b6a5417 JS |
3273 | options->word_regex = arg + 14; |
3274 | } | |
882749a0 TR |
3275 | else if (!strcmp(arg, "--word-diff")) { |
3276 | if (options->word_diff == DIFF_WORDS_NONE) | |
3277 | options->word_diff = DIFF_WORDS_PLAIN; | |
3278 | } | |
3279 | else if (!prefixcmp(arg, "--word-diff=")) { | |
3280 | const char *type = arg + 12; | |
3281 | if (!strcmp(type, "plain")) | |
3282 | options->word_diff = DIFF_WORDS_PLAIN; | |
3283 | else if (!strcmp(type, "color")) { | |
3284 | DIFF_OPT_SET(options, COLOR_DIFF); | |
3285 | options->word_diff = DIFF_WORDS_COLOR; | |
3286 | } | |
3287 | else if (!strcmp(type, "porcelain")) | |
3288 | options->word_diff = DIFF_WORDS_PORCELAIN; | |
3289 | else if (!strcmp(type, "none")) | |
3290 | options->word_diff = DIFF_WORDS_NONE; | |
3291 | else | |
3292 | die("bad --word-diff argument: %s", type); | |
3293 | } | |
dea007fb | 3294 | else if ((argcount = parse_long_opt("word-diff-regex", av, &optarg))) { |
882749a0 TR |
3295 | if (options->word_diff == DIFF_WORDS_NONE) |
3296 | options->word_diff = DIFF_WORDS_PLAIN; | |
dea007fb MM |
3297 | options->word_regex = optarg; |
3298 | return argcount; | |
882749a0 | 3299 | } |
41bbf9d5 | 3300 | else if (!strcmp(arg, "--exit-code")) |
8f67f8ae | 3301 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); |
68aacb2f | 3302 | else if (!strcmp(arg, "--quiet")) |
90b19941 | 3303 | DIFF_OPT_SET(options, QUICK); |
72909bef | 3304 | else if (!strcmp(arg, "--ext-diff")) |
8f67f8ae | 3305 | DIFF_OPT_SET(options, ALLOW_EXTERNAL); |
72909bef | 3306 | else if (!strcmp(arg, "--no-ext-diff")) |
8f67f8ae | 3307 | DIFF_OPT_CLR(options, ALLOW_EXTERNAL); |
e10ea812 JK |
3308 | else if (!strcmp(arg, "--textconv")) |
3309 | DIFF_OPT_SET(options, ALLOW_TEXTCONV); | |
3310 | else if (!strcmp(arg, "--no-textconv")) | |
3311 | DIFF_OPT_CLR(options, ALLOW_TEXTCONV); | |
aee9c7d6 JL |
3312 | else if (!strcmp(arg, "--ignore-submodules")) { |
3313 | DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); | |
46a958b3 | 3314 | handle_ignore_submodules_arg(options, "all"); |
aee9c7d6 JL |
3315 | } else if (!prefixcmp(arg, "--ignore-submodules=")) { |
3316 | DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); | |
46a958b3 | 3317 | handle_ignore_submodules_arg(options, arg + 20); |
aee9c7d6 | 3318 | } else if (!strcmp(arg, "--submodule")) |
752c0c24 JS |
3319 | DIFF_OPT_SET(options, SUBMODULE_LOG); |
3320 | else if (!prefixcmp(arg, "--submodule=")) { | |
3321 | if (!strcmp(arg + 12, "log")) | |
3322 | DIFF_OPT_SET(options, SUBMODULE_LOG); | |
3323 | } | |
d054680c PH |
3324 | |
3325 | /* misc options */ | |
3326 | else if (!strcmp(arg, "-z")) | |
3327 | options->line_termination = 0; | |
dea007fb MM |
3328 | else if ((argcount = short_opt('l', av, &optarg))) { |
3329 | options->rename_limit = strtoul(optarg, NULL, 10); | |
3330 | return argcount; | |
3331 | } | |
3332 | else if ((argcount = short_opt('S', av, &optarg))) { | |
3333 | options->pickaxe = optarg; | |
f506b8e8 JH |
3334 | options->pickaxe_opts |= DIFF_PICKAXE_KIND_S; |
3335 | return argcount; | |
3336 | } else if ((argcount = short_opt('G', av, &optarg))) { | |
3337 | options->pickaxe = optarg; | |
3338 | options->pickaxe_opts |= DIFF_PICKAXE_KIND_G; | |
dea007fb MM |
3339 | return argcount; |
3340 | } | |
d054680c | 3341 | else if (!strcmp(arg, "--pickaxe-all")) |
f506b8e8 | 3342 | options->pickaxe_opts |= DIFF_PICKAXE_ALL; |
d054680c | 3343 | else if (!strcmp(arg, "--pickaxe-regex")) |
f506b8e8 | 3344 | options->pickaxe_opts |= DIFF_PICKAXE_REGEX; |
dea007fb MM |
3345 | else if ((argcount = short_opt('O', av, &optarg))) { |
3346 | options->orderfile = optarg; | |
3347 | return argcount; | |
3348 | } | |
3349 | else if ((argcount = parse_long_opt("diff-filter", av, &optarg))) { | |
3350 | options->filter = optarg; | |
3351 | return argcount; | |
3352 | } | |
d054680c PH |
3353 | else if (!strcmp(arg, "--abbrev")) |
3354 | options->abbrev = DEFAULT_ABBREV; | |
3355 | else if (!prefixcmp(arg, "--abbrev=")) { | |
3356 | options->abbrev = strtoul(arg + 9, NULL, 10); | |
3357 | if (options->abbrev < MINIMUM_ABBREV) | |
3358 | options->abbrev = MINIMUM_ABBREV; | |
3359 | else if (40 < options->abbrev) | |
3360 | options->abbrev = 40; | |
3361 | } | |
dea007fb MM |
3362 | else if ((argcount = parse_long_opt("src-prefix", av, &optarg))) { |
3363 | options->a_prefix = optarg; | |
3364 | return argcount; | |
3365 | } | |
3366 | else if ((argcount = parse_long_opt("dst-prefix", av, &optarg))) { | |
3367 | options->b_prefix = optarg; | |
3368 | return argcount; | |
3369 | } | |
eab9a40b JS |
3370 | else if (!strcmp(arg, "--no-prefix")) |
3371 | options->a_prefix = options->b_prefix = ""; | |
6d0e674a RS |
3372 | else if (opt_arg(arg, '\0', "inter-hunk-context", |
3373 | &options->interhunkcontext)) | |
3374 | ; | |
dea007fb MM |
3375 | else if ((argcount = parse_long_opt("output", av, &optarg))) { |
3376 | options->file = fopen(optarg, "w"); | |
8324b977 | 3377 | if (!options->file) |
9ec26eb7 | 3378 | die_errno("Could not open '%s'", optarg); |
c0c77734 | 3379 | options->close_file = 1; |
dea007fb | 3380 | return argcount; |
c0c77734 | 3381 | } else |
6973dcae JH |
3382 | return 0; |
3383 | return 1; | |
3384 | } | |
3385 | ||
10ae7526 | 3386 | int parse_rename_score(const char **cp_p) |
6973dcae JH |
3387 | { |
3388 | unsigned long num, scale; | |
3389 | int ch, dot; | |
3390 | const char *cp = *cp_p; | |
3391 | ||
3392 | num = 0; | |
3393 | scale = 1; | |
3394 | dot = 0; | |
eeefa7c9 | 3395 | for (;;) { |
6973dcae JH |
3396 | ch = *cp; |
3397 | if ( !dot && ch == '.' ) { | |
3398 | scale = 1; | |
3399 | dot = 1; | |
3400 | } else if ( ch == '%' ) { | |
3401 | scale = dot ? scale*100 : 100; | |
3402 | cp++; /* % is always at the end */ | |
3403 | break; | |
3404 | } else if ( ch >= '0' && ch <= '9' ) { | |
3405 | if ( scale < 100000 ) { | |
3406 | scale *= 10; | |
3407 | num = (num*10) + (ch-'0'); | |
3408 | } | |
3409 | } else { | |
3410 | break; | |
3411 | } | |
3412 | cp++; | |
3413 | } | |
3414 | *cp_p = cp; | |
3415 | ||
3416 | /* user says num divided by scale and we say internally that | |
3417 | * is MAX_SCORE * num / scale. | |
3418 | */ | |
dc49cd76 | 3419 | return (int)((num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale)); |
6973dcae JH |
3420 | } |
3421 | ||
16befb8b | 3422 | static int diff_scoreopt_parse(const char *opt) |
6973dcae JH |
3423 | { |
3424 | int opt1, opt2, cmd; | |
3425 | ||
3426 | if (*opt++ != '-') | |
3427 | return -1; | |
3428 | cmd = *opt++; | |
37ab5156 KB |
3429 | if (cmd == '-') { |
3430 | /* convert the long-form arguments into short-form versions */ | |
3431 | if (!prefixcmp(opt, "break-rewrites")) { | |
3432 | opt += strlen("break-rewrites"); | |
3433 | if (*opt == 0 || *opt++ == '=') | |
3434 | cmd = 'B'; | |
f611ddc7 YD |
3435 | } else if (!prefixcmp(opt, "find-copies")) { |
3436 | opt += strlen("find-copies"); | |
37ab5156 KB |
3437 | if (*opt == 0 || *opt++ == '=') |
3438 | cmd = 'C'; | |
f611ddc7 YD |
3439 | } else if (!prefixcmp(opt, "find-renames")) { |
3440 | opt += strlen("find-renames"); | |
37ab5156 KB |
3441 | if (*opt == 0 || *opt++ == '=') |
3442 | cmd = 'M'; | |
3443 | } | |
3444 | } | |
6973dcae JH |
3445 | if (cmd != 'M' && cmd != 'C' && cmd != 'B') |
3446 | return -1; /* that is not a -M, -C nor -B option */ | |
3447 | ||
10ae7526 | 3448 | opt1 = parse_rename_score(&opt); |
6973dcae JH |
3449 | if (cmd != 'B') |
3450 | opt2 = 0; | |
3451 | else { | |
3452 | if (*opt == 0) | |
3453 | opt2 = 0; | |
3454 | else if (*opt != '/') | |
3455 | return -1; /* we expect -B80/99 or -B80 */ | |
3456 | else { | |
3457 | opt++; | |
10ae7526 | 3458 | opt2 = parse_rename_score(&opt); |
6973dcae JH |
3459 | } |
3460 | } | |
3461 | if (*opt != 0) | |
3462 | return -1; | |
3463 | return opt1 | (opt2 << 16); | |
3464 | } | |
3465 | ||
3466 | struct diff_queue_struct diff_queued_diff; | |
3467 | ||
3468 | void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp) | |
3469 | { | |
3470 | if (queue->alloc <= queue->nr) { | |
3471 | queue->alloc = alloc_nr(queue->alloc); | |
3472 | queue->queue = xrealloc(queue->queue, | |
3473 | sizeof(dp) * queue->alloc); | |
3474 | } | |
3475 | queue->queue[queue->nr++] = dp; | |
3476 | } | |
3477 | ||
3478 | struct diff_filepair *diff_queue(struct diff_queue_struct *queue, | |
3479 | struct diff_filespec *one, | |
3480 | struct diff_filespec *two) | |
3481 | { | |
ef677686 | 3482 | struct diff_filepair *dp = xcalloc(1, sizeof(*dp)); |
6973dcae JH |
3483 | dp->one = one; |
3484 | dp->two = two; | |
6973dcae JH |
3485 | if (queue) |
3486 | diff_q(queue, dp); | |
3487 | return dp; | |
3488 | } | |
3489 | ||
3490 | void diff_free_filepair(struct diff_filepair *p) | |
3491 | { | |
9fb88419 LT |
3492 | free_filespec(p->one); |
3493 | free_filespec(p->two); | |
6973dcae JH |
3494 | free(p); |
3495 | } | |
3496 | ||
3497 | /* This is different from find_unique_abbrev() in that | |
3498 | * it stuffs the result with dots for alignment. | |
3499 | */ | |
3500 | const char *diff_unique_abbrev(const unsigned char *sha1, int len) | |
3501 | { | |
3502 | int abblen; | |
3503 | const char *abbrev; | |
3504 | if (len == 40) | |
3505 | return sha1_to_hex(sha1); | |
3506 | ||
3507 | abbrev = find_unique_abbrev(sha1, len); | |
6973dcae JH |
3508 | abblen = strlen(abbrev); |
3509 | if (abblen < 37) { | |
3510 | static char hex[41]; | |
3511 | if (len < abblen && abblen <= len + 2) | |
3512 | sprintf(hex, "%s%.*s", abbrev, len+3-abblen, ".."); | |
3513 | else | |
3514 | sprintf(hex, "%s...", abbrev); | |
3515 | return hex; | |
3516 | } | |
3517 | return sha1_to_hex(sha1); | |
3518 | } | |
3519 | ||
663af342 | 3520 | static void diff_flush_raw(struct diff_filepair *p, struct diff_options *opt) |
6973dcae | 3521 | { |
663af342 PH |
3522 | int line_termination = opt->line_termination; |
3523 | int inter_name_termination = line_termination ? '\t' : '\0'; | |
7be57610 BY |
3524 | if (opt->output_prefix) { |
3525 | struct strbuf *msg = NULL; | |
3526 | msg = opt->output_prefix(opt, opt->output_prefix_data); | |
3527 | fprintf(opt->file, "%s", msg->buf); | |
3528 | } | |
6973dcae | 3529 | |
663af342 | 3530 | if (!(opt->output_format & DIFF_FORMAT_NAME_STATUS)) { |
c0c77734 DB |
3531 | fprintf(opt->file, ":%06o %06o %s ", p->one->mode, p->two->mode, |
3532 | diff_unique_abbrev(p->one->sha1, opt->abbrev)); | |
3533 | fprintf(opt->file, "%s ", diff_unique_abbrev(p->two->sha1, opt->abbrev)); | |
6973dcae | 3534 | } |
663af342 | 3535 | if (p->score) { |
c0c77734 DB |
3536 | fprintf(opt->file, "%c%03d%c", p->status, similarity_index(p), |
3537 | inter_name_termination); | |
663af342 | 3538 | } else { |
c0c77734 | 3539 | fprintf(opt->file, "%c%c", p->status, inter_name_termination); |
6973dcae | 3540 | } |
6973dcae | 3541 | |
cd676a51 JH |
3542 | if (p->status == DIFF_STATUS_COPIED || |
3543 | p->status == DIFF_STATUS_RENAMED) { | |
3544 | const char *name_a, *name_b; | |
3545 | name_a = p->one->path; | |
3546 | name_b = p->two->path; | |
3547 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 DB |
3548 | write_name_quoted(name_a, opt->file, inter_name_termination); |
3549 | write_name_quoted(name_b, opt->file, line_termination); | |
663af342 | 3550 | } else { |
cd676a51 JH |
3551 | const char *name_a, *name_b; |
3552 | name_a = p->one->mode ? p->one->path : p->two->path; | |
3553 | name_b = NULL; | |
3554 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 | 3555 | write_name_quoted(name_a, opt->file, line_termination); |
663af342 | 3556 | } |
6973dcae JH |
3557 | } |
3558 | ||
3559 | int diff_unmodified_pair(struct diff_filepair *p) | |
3560 | { | |
3561 | /* This function is written stricter than necessary to support | |
3562 | * the currently implemented transformers, but the idea is to | |
3563 | * let transformers to produce diff_filepairs any way they want, | |
3564 | * and filter and clean them up here before producing the output. | |
3565 | */ | |
663af342 | 3566 | struct diff_filespec *one = p->one, *two = p->two; |
6973dcae JH |
3567 | |
3568 | if (DIFF_PAIR_UNMERGED(p)) | |
3569 | return 0; /* unmerged is interesting */ | |
3570 | ||
6973dcae JH |
3571 | /* deletion, addition, mode or type change |
3572 | * and rename are all interesting. | |
3573 | */ | |
3574 | if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) || | |
3575 | DIFF_PAIR_MODE_CHANGED(p) || | |
3576 | strcmp(one->path, two->path)) | |
3577 | return 0; | |
3578 | ||
3579 | /* both are valid and point at the same path. that is, we are | |
3580 | * dealing with a change. | |
3581 | */ | |
3582 | if (one->sha1_valid && two->sha1_valid && | |
85adbf2f JL |
3583 | !hashcmp(one->sha1, two->sha1) && |
3584 | !one->dirty_submodule && !two->dirty_submodule) | |
6973dcae JH |
3585 | return 1; /* no change */ |
3586 | if (!one->sha1_valid && !two->sha1_valid) | |
3587 | return 1; /* both look at the same file on the filesystem. */ | |
3588 | return 0; | |
3589 | } | |
3590 | ||
3591 | static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o) | |
3592 | { | |
3593 | if (diff_unmodified_pair(p)) | |
3594 | return; | |
3595 | ||
3596 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
3597 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
3598 | return; /* no tree diffs in patch format */ | |
3599 | ||
3600 | run_diff(p, o); | |
3601 | } | |
3602 | ||
3603 | static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o, | |
3604 | struct diffstat_t *diffstat) | |
3605 | { | |
3606 | if (diff_unmodified_pair(p)) | |
3607 | return; | |
3608 | ||
3609 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
3610 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
c3fced64 | 3611 | return; /* no useful stat for tree diffs */ |
6973dcae JH |
3612 | |
3613 | run_diffstat(p, o, diffstat); | |
3614 | } | |
3615 | ||
88246898 JS |
3616 | static void diff_flush_checkdiff(struct diff_filepair *p, |
3617 | struct diff_options *o) | |
3618 | { | |
3619 | if (diff_unmodified_pair(p)) | |
3620 | return; | |
3621 | ||
3622 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
3623 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
c3fced64 | 3624 | return; /* nothing to check in tree diffs */ |
88246898 JS |
3625 | |
3626 | run_checkdiff(p, o); | |
3627 | } | |
3628 | ||
6973dcae JH |
3629 | int diff_queue_is_empty(void) |
3630 | { | |
3631 | struct diff_queue_struct *q = &diff_queued_diff; | |
3632 | int i; | |
3633 | for (i = 0; i < q->nr; i++) | |
3634 | if (!diff_unmodified_pair(q->queue[i])) | |
3635 | return 0; | |
3636 | return 1; | |
3637 | } | |
3638 | ||
3639 | #if DIFF_DEBUG | |
3640 | void diff_debug_filespec(struct diff_filespec *s, int x, const char *one) | |
3641 | { | |
3642 | fprintf(stderr, "queue[%d] %s (%s) %s %06o %s\n", | |
3643 | x, one ? one : "", | |
3644 | s->path, | |
3645 | DIFF_FILE_VALID(s) ? "valid" : "invalid", | |
3646 | s->mode, | |
3647 | s->sha1_valid ? sha1_to_hex(s->sha1) : ""); | |
3648 | fprintf(stderr, "queue[%d] %s size %lu flags %d\n", | |
3649 | x, one ? one : "", | |
3650 | s->size, s->xfrm_flags); | |
3651 | } | |
3652 | ||
3653 | void diff_debug_filepair(const struct diff_filepair *p, int i) | |
3654 | { | |
3655 | diff_debug_filespec(p->one, i, "one"); | |
3656 | diff_debug_filespec(p->two, i, "two"); | |
64479711 | 3657 | fprintf(stderr, "score %d, status %c rename_used %d broken %d\n", |
6973dcae | 3658 | p->score, p->status ? p->status : '?', |
64479711 | 3659 | p->one->rename_used, p->broken_pair); |
6973dcae JH |
3660 | } |
3661 | ||
3662 | void diff_debug_queue(const char *msg, struct diff_queue_struct *q) | |
3663 | { | |
3664 | int i; | |
3665 | if (msg) | |
3666 | fprintf(stderr, "%s\n", msg); | |
3667 | fprintf(stderr, "q->nr = %d\n", q->nr); | |
3668 | for (i = 0; i < q->nr; i++) { | |
3669 | struct diff_filepair *p = q->queue[i]; | |
3670 | diff_debug_filepair(p, i); | |
3671 | } | |
3672 | } | |
3673 | #endif | |
3674 | ||
3675 | static void diff_resolve_rename_copy(void) | |
3676 | { | |
64479711 LT |
3677 | int i; |
3678 | struct diff_filepair *p; | |
6973dcae JH |
3679 | struct diff_queue_struct *q = &diff_queued_diff; |
3680 | ||
3681 | diff_debug_queue("resolve-rename-copy", q); | |
3682 | ||
3683 | for (i = 0; i < q->nr; i++) { | |
3684 | p = q->queue[i]; | |
3685 | p->status = 0; /* undecided */ | |
3686 | if (DIFF_PAIR_UNMERGED(p)) | |
3687 | p->status = DIFF_STATUS_UNMERGED; | |
3688 | else if (!DIFF_FILE_VALID(p->one)) | |
3689 | p->status = DIFF_STATUS_ADDED; | |
3690 | else if (!DIFF_FILE_VALID(p->two)) | |
3691 | p->status = DIFF_STATUS_DELETED; | |
3692 | else if (DIFF_PAIR_TYPE_CHANGED(p)) | |
3693 | p->status = DIFF_STATUS_TYPE_CHANGED; | |
3694 | ||
3695 | /* from this point on, we are dealing with a pair | |
3696 | * whose both sides are valid and of the same type, i.e. | |
3697 | * either in-place edit or rename/copy edit. | |
3698 | */ | |
3699 | else if (DIFF_PAIR_RENAME(p)) { | |
64479711 LT |
3700 | /* |
3701 | * A rename might have re-connected a broken | |
3702 | * pair up, causing the pathnames to be the | |
3703 | * same again. If so, that's not a rename at | |
3704 | * all, just a modification.. | |
3705 | * | |
3706 | * Otherwise, see if this source was used for | |
3707 | * multiple renames, in which case we decrement | |
3708 | * the count, and call it a copy. | |
6973dcae | 3709 | */ |
64479711 LT |
3710 | if (!strcmp(p->one->path, p->two->path)) |
3711 | p->status = DIFF_STATUS_MODIFIED; | |
3712 | else if (--p->one->rename_used > 0) | |
6973dcae | 3713 | p->status = DIFF_STATUS_COPIED; |
64479711 | 3714 | else |
6973dcae JH |
3715 | p->status = DIFF_STATUS_RENAMED; |
3716 | } | |
a89fccd2 | 3717 | else if (hashcmp(p->one->sha1, p->two->sha1) || |
d516c2d1 | 3718 | p->one->mode != p->two->mode || |
85adbf2f JL |
3719 | p->one->dirty_submodule || |
3720 | p->two->dirty_submodule || | |
d516c2d1 | 3721 | is_null_sha1(p->one->sha1)) |
6973dcae JH |
3722 | p->status = DIFF_STATUS_MODIFIED; |
3723 | else { | |
3724 | /* This is a "no-change" entry and should not | |
3725 | * happen anymore, but prepare for broken callers. | |
3726 | */ | |
3727 | error("feeding unmodified %s to diffcore", | |
3728 | p->one->path); | |
3729 | p->status = DIFF_STATUS_UNKNOWN; | |
3730 | } | |
3731 | } | |
3732 | diff_debug_queue("resolve-rename-copy done", q); | |
3733 | } | |
3734 | ||
c6744349 | 3735 | static int check_pair_status(struct diff_filepair *p) |
6973dcae | 3736 | { |
6973dcae JH |
3737 | switch (p->status) { |
3738 | case DIFF_STATUS_UNKNOWN: | |
c6744349 | 3739 | return 0; |
6973dcae JH |
3740 | case 0: |
3741 | die("internal error in diff-resolve-rename-copy"); | |
6973dcae | 3742 | default: |
c6744349 | 3743 | return 1; |
6973dcae JH |
3744 | } |
3745 | } | |
3746 | ||
c6744349 TH |
3747 | static void flush_one_pair(struct diff_filepair *p, struct diff_options *opt) |
3748 | { | |
3749 | int fmt = opt->output_format; | |
3750 | ||
3751 | if (fmt & DIFF_FORMAT_CHECKDIFF) | |
3752 | diff_flush_checkdiff(p, opt); | |
3753 | else if (fmt & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS)) | |
3754 | diff_flush_raw(p, opt); | |
cd676a51 JH |
3755 | else if (fmt & DIFF_FORMAT_NAME) { |
3756 | const char *name_a, *name_b; | |
3757 | name_a = p->two->path; | |
3758 | name_b = NULL; | |
3759 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 | 3760 | write_name_quoted(name_a, opt->file, opt->line_termination); |
cd676a51 | 3761 | } |
c6744349 TH |
3762 | } |
3763 | ||
c0c77734 | 3764 | static void show_file_mode_name(FILE *file, const char *newdelete, struct diff_filespec *fs) |
4bbd261b SE |
3765 | { |
3766 | if (fs->mode) | |
c0c77734 | 3767 | fprintf(file, " %s mode %06o ", newdelete, fs->mode); |
4bbd261b | 3768 | else |
c0c77734 DB |
3769 | fprintf(file, " %s ", newdelete); |
3770 | write_name_quoted(fs->path, file, '\n'); | |
4bbd261b SE |
3771 | } |
3772 | ||
3773 | ||
7be57610 BY |
3774 | static void show_mode_change(FILE *file, struct diff_filepair *p, int show_name, |
3775 | const char *line_prefix) | |
4bbd261b SE |
3776 | { |
3777 | if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) { | |
7be57610 BY |
3778 | fprintf(file, "%s mode change %06o => %06o%c", line_prefix, p->one->mode, |
3779 | p->two->mode, show_name ? ' ' : '\n'); | |
0d26a64e | 3780 | if (show_name) { |
c0c77734 | 3781 | write_name_quoted(p->two->path, file, '\n'); |
0d26a64e | 3782 | } |
4bbd261b SE |
3783 | } |
3784 | } | |
3785 | ||
7be57610 BY |
3786 | static void show_rename_copy(FILE *file, const char *renamecopy, struct diff_filepair *p, |
3787 | const char *line_prefix) | |
4bbd261b | 3788 | { |
b9f44164 | 3789 | char *names = pprint_rename(p->one->path, p->two->path); |
4bbd261b | 3790 | |
c0c77734 | 3791 | fprintf(file, " %s %s (%d%%)\n", renamecopy, names, similarity_index(p)); |
b9f44164 | 3792 | free(names); |
7be57610 | 3793 | show_mode_change(file, p, 0, line_prefix); |
4bbd261b SE |
3794 | } |
3795 | ||
7be57610 | 3796 | static void diff_summary(struct diff_options *opt, struct diff_filepair *p) |
4bbd261b | 3797 | { |
7be57610 BY |
3798 | FILE *file = opt->file; |
3799 | char *line_prefix = ""; | |
3800 | ||
3801 | if (opt->output_prefix) { | |
3802 | struct strbuf *buf = opt->output_prefix(opt, opt->output_prefix_data); | |
3803 | line_prefix = buf->buf; | |
3804 | } | |
3805 | ||
4bbd261b SE |
3806 | switch(p->status) { |
3807 | case DIFF_STATUS_DELETED: | |
7be57610 | 3808 | fputs(line_prefix, file); |
c0c77734 | 3809 | show_file_mode_name(file, "delete", p->one); |
4bbd261b SE |
3810 | break; |
3811 | case DIFF_STATUS_ADDED: | |
7be57610 | 3812 | fputs(line_prefix, file); |
c0c77734 | 3813 | show_file_mode_name(file, "create", p->two); |
4bbd261b SE |
3814 | break; |
3815 | case DIFF_STATUS_COPIED: | |
7be57610 BY |
3816 | fputs(line_prefix, file); |
3817 | show_rename_copy(file, "copy", p, line_prefix); | |
4bbd261b SE |
3818 | break; |
3819 | case DIFF_STATUS_RENAMED: | |
7be57610 BY |
3820 | fputs(line_prefix, file); |
3821 | show_rename_copy(file, "rename", p, line_prefix); | |
4bbd261b SE |
3822 | break; |
3823 | default: | |
3824 | if (p->score) { | |
7be57610 | 3825 | fprintf(file, "%s rewrite ", line_prefix); |
c0c77734 DB |
3826 | write_name_quoted(p->two->path, file, ' '); |
3827 | fprintf(file, "(%d%%)\n", similarity_index(p)); | |
663af342 | 3828 | } |
7be57610 | 3829 | show_mode_change(file, p, !p->score, line_prefix); |
4bbd261b SE |
3830 | break; |
3831 | } | |
3832 | } | |
3833 | ||
fcb3d0ad | 3834 | struct patch_id_t { |
9126f009 | 3835 | git_SHA_CTX *ctx; |
fcb3d0ad JS |
3836 | int patchlen; |
3837 | }; | |
3838 | ||
3839 | static int remove_space(char *line, int len) | |
3840 | { | |
3841 | int i; | |
663af342 PH |
3842 | char *dst = line; |
3843 | unsigned char c; | |
fcb3d0ad | 3844 | |
663af342 PH |
3845 | for (i = 0; i < len; i++) |
3846 | if (!isspace((c = line[i]))) | |
3847 | *dst++ = c; | |
fcb3d0ad | 3848 | |
663af342 | 3849 | return dst - line; |
fcb3d0ad JS |
3850 | } |
3851 | ||
3852 | static void patch_id_consume(void *priv, char *line, unsigned long len) | |
3853 | { | |
3854 | struct patch_id_t *data = priv; | |
3855 | int new_len; | |
3856 | ||
3857 | /* Ignore line numbers when computing the SHA1 of the patch */ | |
cc44c765 | 3858 | if (!prefixcmp(line, "@@ -")) |
fcb3d0ad JS |
3859 | return; |
3860 | ||
3861 | new_len = remove_space(line, len); | |
3862 | ||
9126f009 | 3863 | git_SHA1_Update(data->ctx, line, new_len); |
fcb3d0ad JS |
3864 | data->patchlen += new_len; |
3865 | } | |
3866 | ||
3867 | /* returns 0 upon success, and writes result into sha1 */ | |
3868 | static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1) | |
3869 | { | |
3870 | struct diff_queue_struct *q = &diff_queued_diff; | |
3871 | int i; | |
9126f009 | 3872 | git_SHA_CTX ctx; |
fcb3d0ad JS |
3873 | struct patch_id_t data; |
3874 | char buffer[PATH_MAX * 4 + 20]; | |
3875 | ||
9126f009 | 3876 | git_SHA1_Init(&ctx); |
fcb3d0ad JS |
3877 | memset(&data, 0, sizeof(struct patch_id_t)); |
3878 | data.ctx = &ctx; | |
fcb3d0ad JS |
3879 | |
3880 | for (i = 0; i < q->nr; i++) { | |
3881 | xpparam_t xpp; | |
3882 | xdemitconf_t xecfg; | |
fcb3d0ad JS |
3883 | mmfile_t mf1, mf2; |
3884 | struct diff_filepair *p = q->queue[i]; | |
3885 | int len1, len2; | |
3886 | ||
9ccd0a88 | 3887 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 3888 | memset(&xecfg, 0, sizeof(xecfg)); |
fcb3d0ad JS |
3889 | if (p->status == 0) |
3890 | return error("internal diff status error"); | |
3891 | if (p->status == DIFF_STATUS_UNKNOWN) | |
3892 | continue; | |
3893 | if (diff_unmodified_pair(p)) | |
3894 | continue; | |
3895 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
3896 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
3897 | continue; | |
3898 | if (DIFF_PAIR_UNMERGED(p)) | |
3899 | continue; | |
3900 | ||
3901 | diff_fill_sha1_info(p->one); | |
3902 | diff_fill_sha1_info(p->two); | |
3903 | if (fill_mmfile(&mf1, p->one) < 0 || | |
3904 | fill_mmfile(&mf2, p->two) < 0) | |
3905 | return error("unable to read files to diff"); | |
3906 | ||
fcb3d0ad JS |
3907 | len1 = remove_space(p->one->path, strlen(p->one->path)); |
3908 | len2 = remove_space(p->two->path, strlen(p->two->path)); | |
3909 | if (p->one->mode == 0) | |
3910 | len1 = snprintf(buffer, sizeof(buffer), | |
3911 | "diff--gita/%.*sb/%.*s" | |
3912 | "newfilemode%06o" | |
3913 | "---/dev/null" | |
3914 | "+++b/%.*s", | |
3915 | len1, p->one->path, | |
3916 | len2, p->two->path, | |
3917 | p->two->mode, | |
3918 | len2, p->two->path); | |
3919 | else if (p->two->mode == 0) | |
3920 | len1 = snprintf(buffer, sizeof(buffer), | |
3921 | "diff--gita/%.*sb/%.*s" | |
3922 | "deletedfilemode%06o" | |
3923 | "---a/%.*s" | |
3924 | "+++/dev/null", | |
3925 | len1, p->one->path, | |
3926 | len2, p->two->path, | |
3927 | p->one->mode, | |
3928 | len1, p->one->path); | |
3929 | else | |
3930 | len1 = snprintf(buffer, sizeof(buffer), | |
3931 | "diff--gita/%.*sb/%.*s" | |
3932 | "---a/%.*s" | |
3933 | "+++b/%.*s", | |
3934 | len1, p->one->path, | |
3935 | len2, p->two->path, | |
3936 | len1, p->one->path, | |
3937 | len2, p->two->path); | |
9126f009 | 3938 | git_SHA1_Update(&ctx, buffer, len1); |
fcb3d0ad | 3939 | |
34597c1f CB |
3940 | if (diff_filespec_is_binary(p->one) || |
3941 | diff_filespec_is_binary(p->two)) { | |
3942 | git_SHA1_Update(&ctx, sha1_to_hex(p->one->sha1), 40); | |
3943 | git_SHA1_Update(&ctx, sha1_to_hex(p->two->sha1), 40); | |
3944 | continue; | |
3945 | } | |
3946 | ||
582aa00b | 3947 | xpp.flags = 0; |
fcb3d0ad | 3948 | xecfg.ctxlen = 3; |
ad14b450 | 3949 | xecfg.flags = 0; |
8a3f524b | 3950 | xdi_diff_outf(&mf1, &mf2, patch_id_consume, &data, |
dfea7900 | 3951 | &xpp, &xecfg); |
fcb3d0ad JS |
3952 | } |
3953 | ||
9126f009 | 3954 | git_SHA1_Final(sha1, &ctx); |
fcb3d0ad JS |
3955 | return 0; |
3956 | } | |
3957 | ||
3958 | int diff_flush_patch_id(struct diff_options *options, unsigned char *sha1) | |
3959 | { | |
3960 | struct diff_queue_struct *q = &diff_queued_diff; | |
3961 | int i; | |
3962 | int result = diff_get_patch_id(options, sha1); | |
3963 | ||
3964 | for (i = 0; i < q->nr; i++) | |
3965 | diff_free_filepair(q->queue[i]); | |
3966 | ||
3967 | free(q->queue); | |
9ca5df90 | 3968 | DIFF_QUEUE_CLEAR(q); |
fcb3d0ad JS |
3969 | |
3970 | return result; | |
3971 | } | |
3972 | ||
946c3784 | 3973 | static int is_summary_empty(const struct diff_queue_struct *q) |
6973dcae | 3974 | { |
6973dcae | 3975 | int i; |
6973dcae | 3976 | |
946c3784 TH |
3977 | for (i = 0; i < q->nr; i++) { |
3978 | const struct diff_filepair *p = q->queue[i]; | |
3979 | ||
3980 | switch (p->status) { | |
3981 | case DIFF_STATUS_DELETED: | |
3982 | case DIFF_STATUS_ADDED: | |
3983 | case DIFF_STATUS_COPIED: | |
3984 | case DIFF_STATUS_RENAMED: | |
3985 | return 0; | |
3986 | default: | |
3987 | if (p->score) | |
3988 | return 0; | |
3989 | if (p->one->mode && p->two->mode && | |
3990 | p->one->mode != p->two->mode) | |
3991 | return 0; | |
3992 | break; | |
3993 | } | |
6973dcae | 3994 | } |
946c3784 TH |
3995 | return 1; |
3996 | } | |
3997 | ||
f31027c9 JH |
3998 | static const char rename_limit_warning[] = |
3999 | "inexact rename detection was skipped due to too many files."; | |
4000 | ||
4001 | static const char degrade_cc_to_c_warning[] = | |
4002 | "only found copies from modified paths due to too many files."; | |
4003 | ||
4004 | static const char rename_limit_advice[] = | |
4005 | "you may want to set your %s variable to at least " | |
4006 | "%d and retry the command."; | |
4007 | ||
4008 | void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc) | |
4009 | { | |
4010 | if (degraded_cc) | |
4011 | warning(degrade_cc_to_c_warning); | |
4012 | else if (needed) | |
4013 | warning(rename_limit_warning); | |
4014 | else | |
4015 | return; | |
4016 | if (0 < needed && needed < 32767) | |
4017 | warning(rename_limit_advice, varname, needed); | |
4018 | } | |
4019 | ||
6973dcae JH |
4020 | void diff_flush(struct diff_options *options) |
4021 | { | |
4022 | struct diff_queue_struct *q = &diff_queued_diff; | |
c6744349 | 4023 | int i, output_format = options->output_format; |
946c3784 | 4024 | int separator = 0; |
6973dcae | 4025 | |
c6744349 TH |
4026 | /* |
4027 | * Order: raw, stat, summary, patch | |
4028 | * or: name/name-status/checkdiff (other bits clear) | |
4029 | */ | |
946c3784 TH |
4030 | if (!q->nr) |
4031 | goto free_queue; | |
6973dcae | 4032 | |
c6744349 TH |
4033 | if (output_format & (DIFF_FORMAT_RAW | |
4034 | DIFF_FORMAT_NAME | | |
4035 | DIFF_FORMAT_NAME_STATUS | | |
4036 | DIFF_FORMAT_CHECKDIFF)) { | |
6973dcae JH |
4037 | for (i = 0; i < q->nr; i++) { |
4038 | struct diff_filepair *p = q->queue[i]; | |
c6744349 TH |
4039 | if (check_pair_status(p)) |
4040 | flush_one_pair(p, options); | |
6973dcae | 4041 | } |
946c3784 | 4042 | separator++; |
6973dcae | 4043 | } |
c6744349 | 4044 | |
c04a7155 | 4045 | if (output_format & (DIFF_FORMAT_DIFFSTAT|DIFF_FORMAT_SHORTSTAT|DIFF_FORMAT_NUMSTAT)) { |
5e2b0636 | 4046 | struct diffstat_t diffstat; |
c6744349 | 4047 | |
5e2b0636 | 4048 | memset(&diffstat, 0, sizeof(struct diffstat_t)); |
6973dcae JH |
4049 | for (i = 0; i < q->nr; i++) { |
4050 | struct diff_filepair *p = q->queue[i]; | |
c6744349 | 4051 | if (check_pair_status(p)) |
5e2b0636 | 4052 | diff_flush_stat(p, options, &diffstat); |
6973dcae | 4053 | } |
74e2abe5 JH |
4054 | if (output_format & DIFF_FORMAT_NUMSTAT) |
4055 | show_numstat(&diffstat, options); | |
4056 | if (output_format & DIFF_FORMAT_DIFFSTAT) | |
4057 | show_stats(&diffstat, options); | |
f604652e | 4058 | if (output_format & DIFF_FORMAT_SHORTSTAT) |
c0c77734 | 4059 | show_shortstats(&diffstat, options); |
f604652e | 4060 | free_diffstat_info(&diffstat); |
3969cf7d | 4061 | separator++; |
6973dcae | 4062 | } |
c04a7155 JH |
4063 | if (output_format & DIFF_FORMAT_DIRSTAT) |
4064 | show_dirstat(options); | |
6973dcae | 4065 | |
946c3784 | 4066 | if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) { |
7be57610 BY |
4067 | for (i = 0; i < q->nr; i++) { |
4068 | diff_summary(options, q->queue[i]); | |
4069 | } | |
3969cf7d | 4070 | separator++; |
6973dcae JH |
4071 | } |
4072 | ||
6977c250 LA |
4073 | if (output_format & DIFF_FORMAT_NO_OUTPUT && |
4074 | DIFF_OPT_TST(options, EXIT_WITH_STATUS) && | |
4075 | DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) { | |
4076 | /* | |
4077 | * run diff_flush_patch for the exit status. setting | |
4078 | * options->file to /dev/null should be safe, becaue we | |
4079 | * aren't supposed to produce any output anyway. | |
4080 | */ | |
4081 | if (options->close_file) | |
4082 | fclose(options->file); | |
4083 | options->file = fopen("/dev/null", "w"); | |
4084 | if (!options->file) | |
4085 | die_errno("Could not open /dev/null"); | |
4086 | options->close_file = 1; | |
4087 | for (i = 0; i < q->nr; i++) { | |
4088 | struct diff_filepair *p = q->queue[i]; | |
4089 | if (check_pair_status(p)) | |
4090 | diff_flush_patch(p, options); | |
4091 | if (options->found_changes) | |
4092 | break; | |
4093 | } | |
4094 | } | |
4095 | ||
c6744349 | 4096 | if (output_format & DIFF_FORMAT_PATCH) { |
946c3784 | 4097 | if (separator) { |
6b2fbaaf | 4098 | putc(options->line_termination, options->file); |
946c3784 TH |
4099 | if (options->stat_sep) { |
4100 | /* attach patch instead of inline */ | |
c0c77734 | 4101 | fputs(options->stat_sep, options->file); |
946c3784 | 4102 | } |
c6744349 TH |
4103 | } |
4104 | ||
4105 | for (i = 0; i < q->nr; i++) { | |
4106 | struct diff_filepair *p = q->queue[i]; | |
4107 | if (check_pair_status(p)) | |
4108 | diff_flush_patch(p, options); | |
4109 | } | |
4bbd261b SE |
4110 | } |
4111 | ||
04245581 JK |
4112 | if (output_format & DIFF_FORMAT_CALLBACK) |
4113 | options->format_callback(q, options, options->format_callback_data); | |
4114 | ||
c6744349 TH |
4115 | for (i = 0; i < q->nr; i++) |
4116 | diff_free_filepair(q->queue[i]); | |
946c3784 | 4117 | free_queue: |
6973dcae | 4118 | free(q->queue); |
9ca5df90 | 4119 | DIFF_QUEUE_CLEAR(q); |
c0c77734 DB |
4120 | if (options->close_file) |
4121 | fclose(options->file); | |
f245194f JH |
4122 | |
4123 | /* | |
97bf2a08 | 4124 | * Report the content-level differences with HAS_CHANGES; |
f245194f JH |
4125 | * diff_addremove/diff_change does not set the bit when |
4126 | * DIFF_FROM_CONTENTS is in effect (e.g. with -w). | |
4127 | */ | |
4128 | if (DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) { | |
4129 | if (options->found_changes) | |
4130 | DIFF_OPT_SET(options, HAS_CHANGES); | |
4131 | else | |
4132 | DIFF_OPT_CLR(options, HAS_CHANGES); | |
4133 | } | |
6973dcae JH |
4134 | } |
4135 | ||
4136 | static void diffcore_apply_filter(const char *filter) | |
4137 | { | |
4138 | int i; | |
4139 | struct diff_queue_struct *q = &diff_queued_diff; | |
4140 | struct diff_queue_struct outq; | |
9ca5df90 | 4141 | DIFF_QUEUE_CLEAR(&outq); |
6973dcae JH |
4142 | |
4143 | if (!filter) | |
4144 | return; | |
4145 | ||
4146 | if (strchr(filter, DIFF_STATUS_FILTER_AON)) { | |
4147 | int found; | |
4148 | for (i = found = 0; !found && i < q->nr; i++) { | |
4149 | struct diff_filepair *p = q->queue[i]; | |
4150 | if (((p->status == DIFF_STATUS_MODIFIED) && | |
4151 | ((p->score && | |
4152 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
4153 | (!p->score && | |
4154 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
4155 | ((p->status != DIFF_STATUS_MODIFIED) && | |
4156 | strchr(filter, p->status))) | |
4157 | found++; | |
4158 | } | |
4159 | if (found) | |
4160 | return; | |
4161 | ||
4162 | /* otherwise we will clear the whole queue | |
4163 | * by copying the empty outq at the end of this | |
4164 | * function, but first clear the current entries | |
4165 | * in the queue. | |
4166 | */ | |
4167 | for (i = 0; i < q->nr; i++) | |
4168 | diff_free_filepair(q->queue[i]); | |
4169 | } | |
4170 | else { | |
4171 | /* Only the matching ones */ | |
4172 | for (i = 0; i < q->nr; i++) { | |
4173 | struct diff_filepair *p = q->queue[i]; | |
4174 | ||
4175 | if (((p->status == DIFF_STATUS_MODIFIED) && | |
4176 | ((p->score && | |
4177 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
4178 | (!p->score && | |
4179 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
4180 | ((p->status != DIFF_STATUS_MODIFIED) && | |
4181 | strchr(filter, p->status))) | |
4182 | diff_q(&outq, p); | |
4183 | else | |
4184 | diff_free_filepair(p); | |
4185 | } | |
4186 | } | |
4187 | free(q->queue); | |
4188 | *q = outq; | |
4189 | } | |
4190 | ||
5701115a SV |
4191 | /* Check whether two filespecs with the same mode and size are identical */ |
4192 | static int diff_filespec_is_identical(struct diff_filespec *one, | |
4193 | struct diff_filespec *two) | |
4194 | { | |
2b459b48 JH |
4195 | if (S_ISGITLINK(one->mode)) |
4196 | return 0; | |
5701115a SV |
4197 | if (diff_populate_filespec(one, 0)) |
4198 | return 0; | |
4199 | if (diff_populate_filespec(two, 0)) | |
4200 | return 0; | |
4201 | return !memcmp(one->data, two->data, one->size); | |
4202 | } | |
4203 | ||
fb13227e JH |
4204 | static void diffcore_skip_stat_unmatch(struct diff_options *diffopt) |
4205 | { | |
4206 | int i; | |
4207 | struct diff_queue_struct *q = &diff_queued_diff; | |
4208 | struct diff_queue_struct outq; | |
9ca5df90 | 4209 | DIFF_QUEUE_CLEAR(&outq); |
fb13227e JH |
4210 | |
4211 | for (i = 0; i < q->nr; i++) { | |
4212 | struct diff_filepair *p = q->queue[i]; | |
4213 | ||
4214 | /* | |
9517e6b8 | 4215 | * 1. Entries that come from stat info dirtiness |
fb13227e JH |
4216 | * always have both sides (iow, not create/delete), |
4217 | * one side of the object name is unknown, with | |
4218 | * the same mode and size. Keep the ones that | |
4219 | * do not match these criteria. They have real | |
4220 | * differences. | |
4221 | * | |
4222 | * 2. At this point, the file is known to be modified, | |
4223 | * with the same mode and size, and the object | |
4224 | * name of one side is unknown. Need to inspect | |
4225 | * the identical contents. | |
4226 | */ | |
4227 | if (!DIFF_FILE_VALID(p->one) || /* (1) */ | |
4228 | !DIFF_FILE_VALID(p->two) || | |
4229 | (p->one->sha1_valid && p->two->sha1_valid) || | |
4230 | (p->one->mode != p->two->mode) || | |
4231 | diff_populate_filespec(p->one, 1) || | |
4232 | diff_populate_filespec(p->two, 1) || | |
4233 | (p->one->size != p->two->size) || | |
5701115a | 4234 | !diff_filespec_is_identical(p->one, p->two)) /* (2) */ |
fb13227e JH |
4235 | diff_q(&outq, p); |
4236 | else { | |
4237 | /* | |
4238 | * The caller can subtract 1 from skip_stat_unmatch | |
4239 | * to determine how many paths were dirty only | |
4240 | * due to stat info mismatch. | |
4241 | */ | |
8f67f8ae | 4242 | if (!DIFF_OPT_TST(diffopt, NO_INDEX)) |
6d2d9e86 | 4243 | diffopt->skip_stat_unmatch++; |
fb13227e JH |
4244 | diff_free_filepair(p); |
4245 | } | |
4246 | } | |
4247 | free(q->queue); | |
4248 | *q = outq; | |
4249 | } | |
4250 | ||
730f7284 JH |
4251 | static int diffnamecmp(const void *a_, const void *b_) |
4252 | { | |
4253 | const struct diff_filepair *a = *((const struct diff_filepair **)a_); | |
4254 | const struct diff_filepair *b = *((const struct diff_filepair **)b_); | |
4255 | const char *name_a, *name_b; | |
4256 | ||
4257 | name_a = a->one ? a->one->path : a->two->path; | |
4258 | name_b = b->one ? b->one->path : b->two->path; | |
4259 | return strcmp(name_a, name_b); | |
4260 | } | |
4261 | ||
4262 | void diffcore_fix_diff_index(struct diff_options *options) | |
4263 | { | |
4264 | struct diff_queue_struct *q = &diff_queued_diff; | |
4265 | qsort(q->queue, q->nr, sizeof(q->queue[0]), diffnamecmp); | |
4266 | } | |
4267 | ||
6973dcae JH |
4268 | void diffcore_std(struct diff_options *options) |
4269 | { | |
9d865356 | 4270 | if (options->skip_stat_unmatch) |
fb13227e | 4271 | diffcore_skip_stat_unmatch(options); |
44c48a90 JH |
4272 | if (!options->found_follow) { |
4273 | /* See try_to_follow_renames() in tree-diff.c */ | |
4274 | if (options->break_opt != -1) | |
4275 | diffcore_break(options->break_opt); | |
4276 | if (options->detect_rename) | |
4277 | diffcore_rename(options); | |
4278 | if (options->break_opt != -1) | |
4279 | diffcore_merge_broken(); | |
4280 | } | |
6973dcae | 4281 | if (options->pickaxe) |
382f013b | 4282 | diffcore_pickaxe(options); |
6973dcae JH |
4283 | if (options->orderfile) |
4284 | diffcore_order(options->orderfile); | |
44c48a90 JH |
4285 | if (!options->found_follow) |
4286 | /* See try_to_follow_renames() in tree-diff.c */ | |
4287 | diff_resolve_rename_copy(); | |
6973dcae | 4288 | diffcore_apply_filter(options->filter); |
68aacb2f | 4289 | |
f245194f | 4290 | if (diff_queued_diff.nr && !DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) |
8f67f8ae PH |
4291 | DIFF_OPT_SET(options, HAS_CHANGES); |
4292 | else | |
4293 | DIFF_OPT_CLR(options, HAS_CHANGES); | |
1da6175d | 4294 | |
44c48a90 | 4295 | options->found_follow = 0; |
6973dcae JH |
4296 | } |
4297 | ||
da31b358 JH |
4298 | int diff_result_code(struct diff_options *opt, int status) |
4299 | { | |
4300 | int result = 0; | |
f31027c9 JH |
4301 | |
4302 | diff_warn_rename_limit("diff.renamelimit", | |
4303 | opt->needed_rename_limit, | |
4304 | opt->degraded_cc_to_c); | |
da31b358 JH |
4305 | if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && |
4306 | !(opt->output_format & DIFF_FORMAT_CHECKDIFF)) | |
4307 | return status; | |
4308 | if (DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && | |
4309 | DIFF_OPT_TST(opt, HAS_CHANGES)) | |
4310 | result |= 01; | |
4311 | if ((opt->output_format & DIFF_FORMAT_CHECKDIFF) && | |
4312 | DIFF_OPT_TST(opt, CHECK_FAILED)) | |
4313 | result |= 02; | |
4314 | return result; | |
4315 | } | |
6973dcae | 4316 | |
aee9c7d6 JL |
4317 | /* |
4318 | * Shall changes to this submodule be ignored? | |
4319 | * | |
4320 | * Submodule changes can be configured to be ignored separately for each path, | |
4321 | * but that configuration can be overridden from the command line. | |
4322 | */ | |
4323 | static int is_submodule_ignored(const char *path, struct diff_options *options) | |
4324 | { | |
4325 | int ignored = 0; | |
4326 | unsigned orig_flags = options->flags; | |
4327 | if (!DIFF_OPT_TST(options, OVERRIDE_SUBMODULE_CONFIG)) | |
4328 | set_diffopt_flags_from_submodule_config(options, path); | |
4329 | if (DIFF_OPT_TST(options, IGNORE_SUBMODULES)) | |
4330 | ignored = 1; | |
4331 | options->flags = orig_flags; | |
4332 | return ignored; | |
4333 | } | |
4334 | ||
6973dcae JH |
4335 | void diff_addremove(struct diff_options *options, |
4336 | int addremove, unsigned mode, | |
4337 | const unsigned char *sha1, | |
e3d42c47 | 4338 | const char *concatpath, unsigned dirty_submodule) |
6973dcae | 4339 | { |
6973dcae JH |
4340 | struct diff_filespec *one, *two; |
4341 | ||
aee9c7d6 | 4342 | if (S_ISGITLINK(mode) && is_submodule_ignored(concatpath, options)) |
50fd9bd8 JS |
4343 | return; |
4344 | ||
6973dcae JH |
4345 | /* This may look odd, but it is a preparation for |
4346 | * feeding "there are unchanged files which should | |
4347 | * not produce diffs, but when you are doing copy | |
4348 | * detection you would need them, so here they are" | |
4349 | * entries to the diff-core. They will be prefixed | |
4350 | * with something like '=' or '*' (I haven't decided | |
4351 | * which but should not make any difference). | |
a6080a0a | 4352 | * Feeding the same new and old to diff_change() |
6973dcae JH |
4353 | * also has the same effect. |
4354 | * Before the final output happens, they are pruned after | |
4355 | * merged into rename/copy pairs as appropriate. | |
4356 | */ | |
8f67f8ae | 4357 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) |
6973dcae JH |
4358 | addremove = (addremove == '+' ? '-' : |
4359 | addremove == '-' ? '+' : addremove); | |
4360 | ||
cd676a51 JH |
4361 | if (options->prefix && |
4362 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
4363 | return; | |
4364 | ||
6973dcae JH |
4365 | one = alloc_filespec(concatpath); |
4366 | two = alloc_filespec(concatpath); | |
4367 | ||
4368 | if (addremove != '+') | |
4369 | fill_filespec(one, sha1, mode); | |
e3d42c47 | 4370 | if (addremove != '-') { |
6973dcae | 4371 | fill_filespec(two, sha1, mode); |
e3d42c47 JL |
4372 | two->dirty_submodule = dirty_submodule; |
4373 | } | |
6973dcae JH |
4374 | |
4375 | diff_queue(&diff_queued_diff, one, two); | |
f245194f JH |
4376 | if (!DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) |
4377 | DIFF_OPT_SET(options, HAS_CHANGES); | |
6973dcae JH |
4378 | } |
4379 | ||
4380 | void diff_change(struct diff_options *options, | |
4381 | unsigned old_mode, unsigned new_mode, | |
4382 | const unsigned char *old_sha1, | |
4383 | const unsigned char *new_sha1, | |
e3d42c47 JL |
4384 | const char *concatpath, |
4385 | unsigned old_dirty_submodule, unsigned new_dirty_submodule) | |
6973dcae | 4386 | { |
6973dcae JH |
4387 | struct diff_filespec *one, *two; |
4388 | ||
aee9c7d6 JL |
4389 | if (S_ISGITLINK(old_mode) && S_ISGITLINK(new_mode) && |
4390 | is_submodule_ignored(concatpath, options)) | |
50fd9bd8 JS |
4391 | return; |
4392 | ||
8f67f8ae | 4393 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) { |
6973dcae JH |
4394 | unsigned tmp; |
4395 | const unsigned char *tmp_c; | |
4396 | tmp = old_mode; old_mode = new_mode; new_mode = tmp; | |
4397 | tmp_c = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_c; | |
e3d42c47 JL |
4398 | tmp = old_dirty_submodule; old_dirty_submodule = new_dirty_submodule; |
4399 | new_dirty_submodule = tmp; | |
6973dcae | 4400 | } |
cd676a51 JH |
4401 | |
4402 | if (options->prefix && | |
4403 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
4404 | return; | |
4405 | ||
6973dcae JH |
4406 | one = alloc_filespec(concatpath); |
4407 | two = alloc_filespec(concatpath); | |
4408 | fill_filespec(one, old_sha1, old_mode); | |
4409 | fill_filespec(two, new_sha1, new_mode); | |
e3d42c47 JL |
4410 | one->dirty_submodule = old_dirty_submodule; |
4411 | two->dirty_submodule = new_dirty_submodule; | |
6973dcae JH |
4412 | |
4413 | diff_queue(&diff_queued_diff, one, two); | |
f245194f JH |
4414 | if (!DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) |
4415 | DIFF_OPT_SET(options, HAS_CHANGES); | |
6973dcae JH |
4416 | } |
4417 | ||
fa7b2908 | 4418 | struct diff_filepair *diff_unmerge(struct diff_options *options, const char *path) |
6973dcae | 4419 | { |
76399c01 | 4420 | struct diff_filepair *pair; |
6973dcae | 4421 | struct diff_filespec *one, *two; |
cd676a51 JH |
4422 | |
4423 | if (options->prefix && | |
4424 | strncmp(path, options->prefix, options->prefix_length)) | |
76399c01 | 4425 | return NULL; |
cd676a51 | 4426 | |
6973dcae JH |
4427 | one = alloc_filespec(path); |
4428 | two = alloc_filespec(path); | |
76399c01 JH |
4429 | pair = diff_queue(&diff_queued_diff, one, two); |
4430 | pair->is_unmerged = 1; | |
4431 | return pair; | |
6973dcae | 4432 | } |
9cb92c39 JK |
4433 | |
4434 | static char *run_textconv(const char *pgm, struct diff_filespec *spec, | |
4435 | size_t *outsize) | |
4436 | { | |
479b0ae8 | 4437 | struct diff_tempfile *temp; |
9cb92c39 JK |
4438 | const char *argv[3]; |
4439 | const char **arg = argv; | |
4440 | struct child_process child; | |
4441 | struct strbuf buf = STRBUF_INIT; | |
da1fbed3 | 4442 | int err = 0; |
9cb92c39 | 4443 | |
479b0ae8 | 4444 | temp = prepare_temp_file(spec->path, spec); |
9cb92c39 | 4445 | *arg++ = pgm; |
479b0ae8 | 4446 | *arg++ = temp->name; |
9cb92c39 JK |
4447 | *arg = NULL; |
4448 | ||
4449 | memset(&child, 0, sizeof(child)); | |
41a457e4 | 4450 | child.use_shell = 1; |
9cb92c39 JK |
4451 | child.argv = argv; |
4452 | child.out = -1; | |
da1fbed3 | 4453 | if (start_command(&child)) { |
479b0ae8 | 4454 | remove_tempfile(); |
9cb92c39 JK |
4455 | return NULL; |
4456 | } | |
da1fbed3 JS |
4457 | |
4458 | if (strbuf_read(&buf, child.out, 0) < 0) | |
4459 | err = error("error reading from textconv command '%s'", pgm); | |
70d70999 | 4460 | close(child.out); |
da1fbed3 JS |
4461 | |
4462 | if (finish_command(&child) || err) { | |
4463 | strbuf_release(&buf); | |
4464 | remove_tempfile(); | |
4465 | return NULL; | |
4466 | } | |
479b0ae8 | 4467 | remove_tempfile(); |
9cb92c39 JK |
4468 | |
4469 | return strbuf_detach(&buf, outsize); | |
4470 | } | |
840383b2 | 4471 | |
a788d7d5 AB |
4472 | size_t fill_textconv(struct userdiff_driver *driver, |
4473 | struct diff_filespec *df, | |
4474 | char **outbuf) | |
840383b2 JK |
4475 | { |
4476 | size_t size; | |
4477 | ||
d9bae1a1 | 4478 | if (!driver || !driver->textconv) { |
840383b2 JK |
4479 | if (!DIFF_FILE_VALID(df)) { |
4480 | *outbuf = ""; | |
4481 | return 0; | |
4482 | } | |
4483 | if (diff_populate_filespec(df, 0)) | |
4484 | die("unable to read files to diff"); | |
4485 | *outbuf = df->data; | |
4486 | return df->size; | |
4487 | } | |
4488 | ||
9ec09b04 | 4489 | if (driver->textconv_cache && df->sha1_valid) { |
d9bae1a1 JK |
4490 | *outbuf = notes_cache_get(driver->textconv_cache, df->sha1, |
4491 | &size); | |
4492 | if (*outbuf) | |
4493 | return size; | |
4494 | } | |
4495 | ||
4496 | *outbuf = run_textconv(driver->textconv, df, &size); | |
840383b2 JK |
4497 | if (!*outbuf) |
4498 | die("unable to read files to diff"); | |
d9bae1a1 | 4499 | |
9ec09b04 | 4500 | if (driver->textconv_cache && df->sha1_valid) { |
d9bae1a1 JK |
4501 | /* ignore errors, as we might be in a readonly repository */ |
4502 | notes_cache_put(driver->textconv_cache, df->sha1, *outbuf, | |
4503 | size); | |
4504 | /* | |
4505 | * we could save up changes and flush them all at the end, | |
4506 | * but we would need an extra call after all diffing is done. | |
4507 | * Since generating a cache entry is the slow path anyway, | |
4508 | * this extra overhead probably isn't a big deal. | |
4509 | */ | |
4510 | notes_cache_write(driver->textconv_cache); | |
4511 | } | |
4512 | ||
840383b2 JK |
4513 | return size; |
4514 | } |