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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" |
6973dcae | 14 | |
1510fea7 SP |
15 | #ifdef NO_FAST_WORKING_DIRECTORY |
16 | #define FAST_WORKING_DIRECTORY 0 | |
17 | #else | |
18 | #define FAST_WORKING_DIRECTORY 1 | |
19 | #endif | |
20 | ||
96f1e58f | 21 | static int diff_detect_rename_default; |
50705915 | 22 | static int diff_rename_limit_default = 200; |
6b2f2d98 | 23 | int diff_use_color_default = -1; |
cbe02100 | 24 | static const char *external_diff_cmd_cfg; |
aecbf914 | 25 | int diff_auto_refresh_index = 1; |
6973dcae | 26 | |
7c92fe0e | 27 | static char diff_colors[][COLOR_MAXLEN] = { |
f37399e6 | 28 | "\033[m", /* reset */ |
448c3ef1 JH |
29 | "", /* PLAIN (normal) */ |
30 | "\033[1m", /* METAINFO (bold) */ | |
31 | "\033[36m", /* FRAGINFO (cyan) */ | |
32 | "\033[31m", /* OLD (red) */ | |
33 | "\033[32m", /* NEW (green) */ | |
34 | "\033[33m", /* COMMIT (yellow) */ | |
35 | "\033[41m", /* WHITESPACE (red background) */ | |
cd112cef JS |
36 | }; |
37 | ||
801235c5 JH |
38 | static int parse_diff_color_slot(const char *var, int ofs) |
39 | { | |
40 | if (!strcasecmp(var+ofs, "plain")) | |
41 | return DIFF_PLAIN; | |
42 | if (!strcasecmp(var+ofs, "meta")) | |
43 | return DIFF_METAINFO; | |
44 | if (!strcasecmp(var+ofs, "frag")) | |
45 | return DIFF_FRAGINFO; | |
46 | if (!strcasecmp(var+ofs, "old")) | |
47 | return DIFF_FILE_OLD; | |
48 | if (!strcasecmp(var+ofs, "new")) | |
49 | return DIFF_FILE_NEW; | |
ce436973 JK |
50 | if (!strcasecmp(var+ofs, "commit")) |
51 | return DIFF_COMMIT; | |
448c3ef1 JH |
52 | if (!strcasecmp(var+ofs, "whitespace")) |
53 | return DIFF_WHITESPACE; | |
801235c5 JH |
54 | die("bad config variable '%s'", var); |
55 | } | |
56 | ||
f1af60bd JH |
57 | static struct ll_diff_driver { |
58 | const char *name; | |
59 | struct ll_diff_driver *next; | |
b20a60d0 | 60 | const char *cmd; |
f1af60bd JH |
61 | } *user_diff, **user_diff_tail; |
62 | ||
63 | /* | |
64 | * Currently there is only "diff.<drivername>.command" variable; | |
65 | * because there are "diff.color.<slot>" variables, we are parsing | |
66 | * this in a bit convoluted way to allow low level diff driver | |
67 | * called "color". | |
68 | */ | |
69 | static int parse_lldiff_command(const char *var, const char *ep, const char *value) | |
70 | { | |
71 | const char *name; | |
72 | int namelen; | |
73 | struct ll_diff_driver *drv; | |
74 | ||
75 | name = var + 5; | |
76 | namelen = ep - name; | |
77 | for (drv = user_diff; drv; drv = drv->next) | |
78 | if (!strncmp(drv->name, name, namelen) && !drv->name[namelen]) | |
79 | break; | |
80 | if (!drv) { | |
f1af60bd | 81 | drv = xcalloc(1, sizeof(struct ll_diff_driver)); |
182af834 | 82 | drv->name = xmemdupz(name, namelen); |
f1af60bd JH |
83 | if (!user_diff_tail) |
84 | user_diff_tail = &user_diff; | |
85 | *user_diff_tail = drv; | |
86 | user_diff_tail = &(drv->next); | |
87 | } | |
88 | ||
b20a60d0 | 89 | return git_config_string(&(drv->cmd), var, value); |
f1af60bd JH |
90 | } |
91 | ||
e0e324a4 JH |
92 | /* |
93 | * 'diff.<what>.funcname' attribute can be specified in the configuration | |
94 | * to define a customized regexp to find the beginning of a function to | |
95 | * be used for hunk header lines of "diff -p" style output. | |
96 | */ | |
97 | static struct funcname_pattern { | |
98 | char *name; | |
99 | char *pattern; | |
100 | struct funcname_pattern *next; | |
101 | } *funcname_pattern_list; | |
102 | ||
103 | static int parse_funcname_pattern(const char *var, const char *ep, const char *value) | |
104 | { | |
105 | const char *name; | |
106 | int namelen; | |
107 | struct funcname_pattern *pp; | |
108 | ||
109 | name = var + 5; /* "diff." */ | |
110 | namelen = ep - name; | |
111 | ||
112 | for (pp = funcname_pattern_list; pp; pp = pp->next) | |
113 | if (!strncmp(pp->name, name, namelen) && !pp->name[namelen]) | |
114 | break; | |
115 | if (!pp) { | |
e0e324a4 | 116 | pp = xcalloc(1, sizeof(*pp)); |
182af834 | 117 | pp->name = xmemdupz(name, namelen); |
e0e324a4 JH |
118 | pp->next = funcname_pattern_list; |
119 | funcname_pattern_list = pp; | |
120 | } | |
8e0f7003 | 121 | free(pp->pattern); |
e0e324a4 JH |
122 | pp->pattern = xstrdup(value); |
123 | return 0; | |
124 | } | |
125 | ||
83ad63cf JH |
126 | /* |
127 | * These are to give UI layer defaults. | |
128 | * The core-level commands such as git-diff-files should | |
129 | * never be affected by the setting of diff.renames | |
130 | * the user happens to have in the configuration file. | |
131 | */ | |
ef90d6d4 | 132 | int git_diff_ui_config(const char *var, const char *value, void *cb) |
801235c5 | 133 | { |
a159ca0c | 134 | if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) { |
0f6f5a40 | 135 | diff_use_color_default = git_config_colorbool(var, value, -1); |
801235c5 JH |
136 | return 0; |
137 | } | |
b68ea12e EW |
138 | if (!strcmp(var, "diff.renames")) { |
139 | if (!value) | |
140 | diff_detect_rename_default = DIFF_DETECT_RENAME; | |
141 | else if (!strcasecmp(value, "copies") || | |
142 | !strcasecmp(value, "copy")) | |
143 | diff_detect_rename_default = DIFF_DETECT_COPY; | |
144 | else if (git_config_bool(var,value)) | |
145 | diff_detect_rename_default = DIFF_DETECT_RENAME; | |
146 | return 0; | |
147 | } | |
aecbf914 JH |
148 | if (!strcmp(var, "diff.autorefreshindex")) { |
149 | diff_auto_refresh_index = git_config_bool(var, value); | |
150 | return 0; | |
151 | } | |
daec808c BH |
152 | if (!strcmp(var, "diff.external")) |
153 | return git_config_string(&external_diff_cmd_cfg, var, value); | |
f1af60bd JH |
154 | if (!prefixcmp(var, "diff.")) { |
155 | const char *ep = strrchr(var, '.'); | |
156 | ||
2c778210 CC |
157 | if (ep != var + 4 && !strcmp(ep, ".command")) |
158 | return parse_lldiff_command(var, ep, value); | |
f1af60bd | 159 | } |
9a1805a8 | 160 | |
ef90d6d4 | 161 | return git_diff_basic_config(var, value, cb); |
9a1805a8 JK |
162 | } |
163 | ||
ef90d6d4 | 164 | int git_diff_basic_config(const char *var, const char *value, void *cb) |
9a1805a8 | 165 | { |
2b6ca6df LT |
166 | if (!strcmp(var, "diff.renamelimit")) { |
167 | diff_rename_limit_default = git_config_int(var, value); | |
168 | return 0; | |
169 | } | |
170 | ||
1968d77d | 171 | if (!prefixcmp(var, "diff.color.") || !prefixcmp(var, "color.diff.")) { |
801235c5 | 172 | int slot = parse_diff_color_slot(var, 11); |
64f30e94 JH |
173 | if (!value) |
174 | return config_error_nonbool(var); | |
7c92fe0e | 175 | color_parse(value, var, diff_colors[slot]); |
801235c5 JH |
176 | return 0; |
177 | } | |
f1af60bd | 178 | |
e467193f JK |
179 | if (!prefixcmp(var, "diff.")) { |
180 | const char *ep = strrchr(var, '.'); | |
181 | if (ep != var + 4) { | |
64f30e94 JH |
182 | if (!strcmp(ep, ".funcname")) { |
183 | if (!value) | |
184 | return config_error_nonbool(var); | |
e467193f | 185 | return parse_funcname_pattern(var, ep, value); |
64f30e94 | 186 | } |
e467193f JK |
187 | } |
188 | } | |
189 | ||
ef90d6d4 | 190 | return git_color_default_config(var, value, cb); |
801235c5 JH |
191 | } |
192 | ||
6973dcae JH |
193 | static char *quote_two(const char *one, const char *two) |
194 | { | |
195 | int need_one = quote_c_style(one, NULL, NULL, 1); | |
196 | int need_two = quote_c_style(two, NULL, NULL, 1); | |
663af342 | 197 | struct strbuf res; |
6973dcae | 198 | |
663af342 | 199 | strbuf_init(&res, 0); |
6973dcae | 200 | if (need_one + need_two) { |
663af342 PH |
201 | strbuf_addch(&res, '"'); |
202 | quote_c_style(one, &res, NULL, 1); | |
203 | quote_c_style(two, &res, NULL, 1); | |
204 | strbuf_addch(&res, '"'); | |
205 | } else { | |
206 | strbuf_addstr(&res, one); | |
207 | strbuf_addstr(&res, two); | |
6973dcae | 208 | } |
b315c5c0 | 209 | return strbuf_detach(&res, NULL); |
6973dcae JH |
210 | } |
211 | ||
212 | static const char *external_diff(void) | |
213 | { | |
214 | static const char *external_diff_cmd = NULL; | |
215 | static int done_preparing = 0; | |
216 | ||
217 | if (done_preparing) | |
218 | return external_diff_cmd; | |
219 | external_diff_cmd = getenv("GIT_EXTERNAL_DIFF"); | |
cbe02100 JS |
220 | if (!external_diff_cmd) |
221 | external_diff_cmd = external_diff_cmd_cfg; | |
6973dcae JH |
222 | done_preparing = 1; |
223 | return external_diff_cmd; | |
224 | } | |
225 | ||
6973dcae JH |
226 | static struct diff_tempfile { |
227 | const char *name; /* filename external diff should read from */ | |
228 | char hex[41]; | |
229 | char mode[10]; | |
1472966c | 230 | char tmp_path[PATH_MAX]; |
6973dcae JH |
231 | } diff_temp[2]; |
232 | ||
233 | static int count_lines(const char *data, int size) | |
234 | { | |
235 | int count, ch, completely_empty = 1, nl_just_seen = 0; | |
236 | count = 0; | |
237 | while (0 < size--) { | |
238 | ch = *data++; | |
239 | if (ch == '\n') { | |
240 | count++; | |
241 | nl_just_seen = 1; | |
242 | completely_empty = 0; | |
243 | } | |
244 | else { | |
245 | nl_just_seen = 0; | |
246 | completely_empty = 0; | |
247 | } | |
248 | } | |
249 | if (completely_empty) | |
250 | return 0; | |
251 | if (!nl_just_seen) | |
252 | count++; /* no trailing newline */ | |
253 | return count; | |
254 | } | |
255 | ||
c0c77734 | 256 | static void print_line_count(FILE *file, int count) |
6973dcae JH |
257 | { |
258 | switch (count) { | |
259 | case 0: | |
c0c77734 | 260 | fprintf(file, "0,0"); |
6973dcae JH |
261 | break; |
262 | case 1: | |
c0c77734 | 263 | fprintf(file, "1"); |
6973dcae JH |
264 | break; |
265 | default: | |
c0c77734 | 266 | fprintf(file, "1,%d", count); |
6973dcae JH |
267 | break; |
268 | } | |
269 | } | |
270 | ||
c0c77734 DB |
271 | static void copy_file_with_prefix(FILE *file, |
272 | int prefix, const char *data, int size, | |
1468bd47 | 273 | const char *set, const char *reset) |
6973dcae JH |
274 | { |
275 | int ch, nl_just_seen = 1; | |
276 | while (0 < size--) { | |
277 | ch = *data++; | |
13e36ec5 | 278 | if (nl_just_seen) { |
c0c77734 DB |
279 | fputs(set, file); |
280 | putc(prefix, file); | |
13e36ec5 JS |
281 | } |
282 | if (ch == '\n') { | |
6973dcae | 283 | nl_just_seen = 1; |
c0c77734 | 284 | fputs(reset, file); |
13e36ec5 | 285 | } else |
6973dcae | 286 | nl_just_seen = 0; |
c0c77734 | 287 | putc(ch, file); |
6973dcae JH |
288 | } |
289 | if (!nl_just_seen) | |
c0c77734 | 290 | fprintf(file, "%s\n\\ No newline at end of file\n", reset); |
6973dcae JH |
291 | } |
292 | ||
293 | static void emit_rewrite_diff(const char *name_a, | |
294 | const char *name_b, | |
295 | struct diff_filespec *one, | |
13e36ec5 | 296 | struct diff_filespec *two, |
eab9a40b | 297 | struct diff_options *o) |
6973dcae JH |
298 | { |
299 | int lc_a, lc_b; | |
eab9a40b | 300 | int color_diff = DIFF_OPT_TST(o, COLOR_DIFF); |
1a9eb3b9 | 301 | const char *name_a_tab, *name_b_tab; |
13e36ec5 JS |
302 | const char *metainfo = diff_get_color(color_diff, DIFF_METAINFO); |
303 | const char *fraginfo = diff_get_color(color_diff, DIFF_FRAGINFO); | |
304 | const char *old = diff_get_color(color_diff, DIFF_FILE_OLD); | |
305 | const char *new = diff_get_color(color_diff, DIFF_FILE_NEW); | |
306 | const char *reset = diff_get_color(color_diff, DIFF_RESET); | |
d5625091 | 307 | static struct strbuf a_name = STRBUF_INIT, b_name = STRBUF_INIT; |
1a9eb3b9 | 308 | |
8a13becc JH |
309 | name_a += (*name_a == '/'); |
310 | name_b += (*name_b == '/'); | |
1a9eb3b9 JH |
311 | name_a_tab = strchr(name_a, ' ') ? "\t" : ""; |
312 | name_b_tab = strchr(name_b, ' ') ? "\t" : ""; | |
313 | ||
d5625091 JH |
314 | strbuf_reset(&a_name); |
315 | strbuf_reset(&b_name); | |
316 | quote_two_c_style(&a_name, o->a_prefix, name_a, 0); | |
317 | quote_two_c_style(&b_name, o->b_prefix, name_b, 0); | |
318 | ||
6973dcae JH |
319 | diff_populate_filespec(one, 0); |
320 | diff_populate_filespec(two, 0); | |
321 | lc_a = count_lines(one->data, one->size); | |
322 | lc_b = count_lines(two->data, two->size); | |
c0c77734 DB |
323 | fprintf(o->file, |
324 | "%s--- %s%s%s\n%s+++ %s%s%s\n%s@@ -", | |
325 | metainfo, a_name.buf, name_a_tab, reset, | |
326 | metainfo, b_name.buf, name_b_tab, reset, fraginfo); | |
327 | print_line_count(o->file, lc_a); | |
328 | fprintf(o->file, " +"); | |
329 | print_line_count(o->file, lc_b); | |
330 | fprintf(o->file, " @@%s\n", reset); | |
6973dcae | 331 | if (lc_a) |
c0c77734 | 332 | copy_file_with_prefix(o->file, '-', one->data, one->size, old, reset); |
6973dcae | 333 | if (lc_b) |
c0c77734 | 334 | copy_file_with_prefix(o->file, '+', two->data, two->size, new, reset); |
6973dcae JH |
335 | } |
336 | ||
337 | static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one) | |
338 | { | |
339 | if (!DIFF_FILE_VALID(one)) { | |
d2543b8e | 340 | mf->ptr = (char *)""; /* does not matter */ |
6973dcae JH |
341 | mf->size = 0; |
342 | return 0; | |
343 | } | |
344 | else if (diff_populate_filespec(one, 0)) | |
345 | return -1; | |
346 | mf->ptr = one->data; | |
347 | mf->size = one->size; | |
348 | return 0; | |
349 | } | |
350 | ||
f59a59e2 JS |
351 | struct diff_words_buffer { |
352 | mmfile_t text; | |
353 | long alloc; | |
354 | long current; /* output pointer */ | |
355 | int suppressed_newline; | |
356 | }; | |
357 | ||
358 | static void diff_words_append(char *line, unsigned long len, | |
359 | struct diff_words_buffer *buffer) | |
360 | { | |
361 | if (buffer->text.size + len > buffer->alloc) { | |
362 | buffer->alloc = (buffer->text.size + len) * 3 / 2; | |
363 | buffer->text.ptr = xrealloc(buffer->text.ptr, buffer->alloc); | |
364 | } | |
365 | line++; | |
366 | len--; | |
367 | memcpy(buffer->text.ptr + buffer->text.size, line, len); | |
368 | buffer->text.size += len; | |
369 | } | |
370 | ||
371 | struct diff_words_data { | |
372 | struct xdiff_emit_state xm; | |
373 | struct diff_words_buffer minus, plus; | |
c0c77734 | 374 | FILE *file; |
f59a59e2 JS |
375 | }; |
376 | ||
c0c77734 | 377 | static void print_word(FILE *file, struct diff_words_buffer *buffer, int len, int color, |
f59a59e2 JS |
378 | int suppress_newline) |
379 | { | |
380 | const char *ptr; | |
381 | int eol = 0; | |
382 | ||
383 | if (len == 0) | |
384 | return; | |
385 | ||
386 | ptr = buffer->text.ptr + buffer->current; | |
387 | buffer->current += len; | |
388 | ||
389 | if (ptr[len - 1] == '\n') { | |
390 | eol = 1; | |
391 | len--; | |
392 | } | |
393 | ||
c0c77734 DB |
394 | fputs(diff_get_color(1, color), file); |
395 | fwrite(ptr, len, 1, file); | |
396 | fputs(diff_get_color(1, DIFF_RESET), file); | |
f59a59e2 JS |
397 | |
398 | if (eol) { | |
399 | if (suppress_newline) | |
400 | buffer->suppressed_newline = 1; | |
401 | else | |
c0c77734 | 402 | putc('\n', file); |
f59a59e2 JS |
403 | } |
404 | } | |
405 | ||
406 | static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len) | |
407 | { | |
408 | struct diff_words_data *diff_words = priv; | |
409 | ||
410 | if (diff_words->minus.suppressed_newline) { | |
411 | if (line[0] != '+') | |
c0c77734 | 412 | putc('\n', diff_words->file); |
f59a59e2 JS |
413 | diff_words->minus.suppressed_newline = 0; |
414 | } | |
415 | ||
416 | len--; | |
417 | switch (line[0]) { | |
418 | case '-': | |
c0c77734 DB |
419 | print_word(diff_words->file, |
420 | &diff_words->minus, len, DIFF_FILE_OLD, 1); | |
f59a59e2 JS |
421 | break; |
422 | case '+': | |
c0c77734 DB |
423 | print_word(diff_words->file, |
424 | &diff_words->plus, len, DIFF_FILE_NEW, 0); | |
f59a59e2 JS |
425 | break; |
426 | case ' ': | |
c0c77734 DB |
427 | print_word(diff_words->file, |
428 | &diff_words->plus, len, DIFF_PLAIN, 0); | |
f59a59e2 JS |
429 | diff_words->minus.current += len; |
430 | break; | |
431 | } | |
432 | } | |
433 | ||
434 | /* this executes the word diff on the accumulated buffers */ | |
435 | static void diff_words_show(struct diff_words_data *diff_words) | |
436 | { | |
437 | xpparam_t xpp; | |
438 | xdemitconf_t xecfg; | |
439 | xdemitcb_t ecb; | |
440 | mmfile_t minus, plus; | |
441 | int i; | |
442 | ||
30b25010 | 443 | memset(&xecfg, 0, sizeof(xecfg)); |
f59a59e2 JS |
444 | minus.size = diff_words->minus.text.size; |
445 | minus.ptr = xmalloc(minus.size); | |
446 | memcpy(minus.ptr, diff_words->minus.text.ptr, minus.size); | |
447 | for (i = 0; i < minus.size; i++) | |
448 | if (isspace(minus.ptr[i])) | |
449 | minus.ptr[i] = '\n'; | |
450 | diff_words->minus.current = 0; | |
451 | ||
452 | plus.size = diff_words->plus.text.size; | |
453 | plus.ptr = xmalloc(plus.size); | |
454 | memcpy(plus.ptr, diff_words->plus.text.ptr, plus.size); | |
455 | for (i = 0; i < plus.size; i++) | |
456 | if (isspace(plus.ptr[i])) | |
457 | plus.ptr[i] = '\n'; | |
458 | diff_words->plus.current = 0; | |
459 | ||
460 | xpp.flags = XDF_NEED_MINIMAL; | |
461 | xecfg.ctxlen = diff_words->minus.alloc + diff_words->plus.alloc; | |
f59a59e2 JS |
462 | ecb.outf = xdiff_outf; |
463 | ecb.priv = diff_words; | |
464 | diff_words->xm.consume = fn_out_diff_words_aux; | |
c279d7e9 | 465 | xdi_diff(&minus, &plus, &xpp, &xecfg, &ecb); |
f59a59e2 JS |
466 | |
467 | free(minus.ptr); | |
468 | free(plus.ptr); | |
469 | diff_words->minus.text.size = diff_words->plus.text.size = 0; | |
470 | ||
471 | if (diff_words->minus.suppressed_newline) { | |
c0c77734 | 472 | putc('\n', diff_words->file); |
f59a59e2 JS |
473 | diff_words->minus.suppressed_newline = 0; |
474 | } | |
475 | } | |
476 | ||
23707811 JH |
477 | typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len); |
478 | ||
6973dcae | 479 | struct emit_callback { |
cd112cef JS |
480 | struct xdiff_emit_state xm; |
481 | int nparents, color_diff; | |
cf1b7869 | 482 | unsigned ws_rule; |
23707811 | 483 | sane_truncate_fn truncate; |
6973dcae | 484 | const char **label_path; |
f59a59e2 | 485 | struct diff_words_data *diff_words; |
34a5e1a2 | 486 | int *found_changesp; |
c0c77734 | 487 | FILE *file; |
6973dcae JH |
488 | }; |
489 | ||
f59a59e2 JS |
490 | static void free_diff_words_data(struct emit_callback *ecbdata) |
491 | { | |
492 | if (ecbdata->diff_words) { | |
493 | /* flush buffers */ | |
494 | if (ecbdata->diff_words->minus.text.size || | |
495 | ecbdata->diff_words->plus.text.size) | |
496 | diff_words_show(ecbdata->diff_words); | |
497 | ||
8e0f7003 JM |
498 | free (ecbdata->diff_words->minus.text.ptr); |
499 | free (ecbdata->diff_words->plus.text.ptr); | |
f59a59e2 JS |
500 | free(ecbdata->diff_words); |
501 | ecbdata->diff_words = NULL; | |
502 | } | |
503 | } | |
504 | ||
ce436973 | 505 | const char *diff_get_color(int diff_use_color, enum color_diff ix) |
cd112cef JS |
506 | { |
507 | if (diff_use_color) | |
50f575fc LT |
508 | return diff_colors[ix]; |
509 | return ""; | |
cd112cef JS |
510 | } |
511 | ||
c0c77734 | 512 | static void emit_line(FILE *file, const char *set, const char *reset, const char *line, int len) |
448c3ef1 | 513 | { |
4afbcab9 JH |
514 | int has_trailing_newline = (len > 0 && line[len-1] == '\n'); |
515 | if (has_trailing_newline) | |
06ff64ae SG |
516 | len--; |
517 | ||
c0c77734 DB |
518 | fputs(set, file); |
519 | fwrite(line, len, 1, file); | |
520 | fputs(reset, file); | |
4afbcab9 JH |
521 | if (has_trailing_newline) |
522 | fputc('\n', file); | |
448c3ef1 JH |
523 | } |
524 | ||
c5a8c3ec JS |
525 | static void emit_add_line(const char *reset, struct emit_callback *ecbdata, const char *line, int len) |
526 | { | |
527 | const char *ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE); | |
528 | const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_NEW); | |
529 | ||
530 | if (!*ws) | |
c0c77734 | 531 | emit_line(ecbdata->file, set, reset, line, len); |
c1795bb0 WC |
532 | else { |
533 | /* Emit just the prefix, then the rest. */ | |
c0c77734 | 534 | emit_line(ecbdata->file, set, reset, line, ecbdata->nparents); |
c1795bb0 WC |
535 | (void)check_and_emit_line(line + ecbdata->nparents, |
536 | len - ecbdata->nparents, ecbdata->ws_rule, | |
c0c77734 | 537 | ecbdata->file, set, reset, ws); |
c1795bb0 | 538 | } |
c5a8c3ec JS |
539 | } |
540 | ||
23707811 JH |
541 | static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, unsigned long len) |
542 | { | |
543 | const char *cp; | |
544 | unsigned long allot; | |
545 | size_t l = len; | |
546 | ||
547 | if (ecb->truncate) | |
548 | return ecb->truncate(line, len); | |
549 | cp = line; | |
550 | allot = l; | |
551 | while (0 < l) { | |
552 | (void) utf8_width(&cp, &l); | |
553 | if (!cp) | |
554 | break; /* truncated in the middle? */ | |
555 | } | |
556 | return allot - l; | |
557 | } | |
558 | ||
cd112cef | 559 | static void fn_out_consume(void *priv, char *line, unsigned long len) |
6973dcae JH |
560 | { |
561 | int i; | |
448c3ef1 | 562 | int color; |
6973dcae | 563 | struct emit_callback *ecbdata = priv; |
472ca780 JK |
564 | const char *meta = diff_get_color(ecbdata->color_diff, DIFF_METAINFO); |
565 | const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN); | |
ce436973 | 566 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); |
6973dcae | 567 | |
34a5e1a2 JS |
568 | *(ecbdata->found_changesp) = 1; |
569 | ||
6973dcae | 570 | if (ecbdata->label_path[0]) { |
1a9eb3b9 JH |
571 | const char *name_a_tab, *name_b_tab; |
572 | ||
573 | name_a_tab = strchr(ecbdata->label_path[0], ' ') ? "\t" : ""; | |
574 | name_b_tab = strchr(ecbdata->label_path[1], ' ') ? "\t" : ""; | |
575 | ||
c0c77734 DB |
576 | fprintf(ecbdata->file, "%s--- %s%s%s\n", |
577 | meta, ecbdata->label_path[0], reset, name_a_tab); | |
578 | fprintf(ecbdata->file, "%s+++ %s%s%s\n", | |
579 | meta, ecbdata->label_path[1], reset, name_b_tab); | |
6973dcae JH |
580 | ecbdata->label_path[0] = ecbdata->label_path[1] = NULL; |
581 | } | |
cd112cef JS |
582 | |
583 | /* This is not really necessary for now because | |
584 | * this codepath only deals with two-way diffs. | |
585 | */ | |
586 | for (i = 0; i < len && line[i] == '@'; i++) | |
587 | ; | |
588 | if (2 <= i && i < len && line[i] == ' ') { | |
589 | ecbdata->nparents = i - 1; | |
23707811 | 590 | len = sane_truncate_line(ecbdata, line, len); |
c0c77734 DB |
591 | emit_line(ecbdata->file, |
592 | diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO), | |
448c3ef1 | 593 | reset, line, len); |
23707811 | 594 | if (line[len-1] != '\n') |
c0c77734 | 595 | putc('\n', ecbdata->file); |
448c3ef1 | 596 | return; |
cd112cef | 597 | } |
448c3ef1 JH |
598 | |
599 | if (len < ecbdata->nparents) { | |
c0c77734 | 600 | emit_line(ecbdata->file, reset, reset, line, len); |
448c3ef1 | 601 | return; |
cd112cef | 602 | } |
448c3ef1 JH |
603 | |
604 | color = DIFF_PLAIN; | |
605 | if (ecbdata->diff_words && ecbdata->nparents != 1) | |
606 | /* fall back to normal diff */ | |
607 | free_diff_words_data(ecbdata); | |
608 | if (ecbdata->diff_words) { | |
609 | if (line[0] == '-') { | |
610 | diff_words_append(line, len, | |
611 | &ecbdata->diff_words->minus); | |
612 | return; | |
613 | } else if (line[0] == '+') { | |
614 | diff_words_append(line, len, | |
615 | &ecbdata->diff_words->plus); | |
616 | return; | |
617 | } | |
618 | if (ecbdata->diff_words->minus.text.size || | |
619 | ecbdata->diff_words->plus.text.size) | |
620 | diff_words_show(ecbdata->diff_words); | |
621 | line++; | |
50f575fc | 622 | len--; |
c0c77734 | 623 | emit_line(ecbdata->file, plain, reset, line, len); |
448c3ef1 JH |
624 | return; |
625 | } | |
626 | for (i = 0; i < ecbdata->nparents && len; i++) { | |
627 | if (line[i] == '-') | |
628 | color = DIFF_FILE_OLD; | |
629 | else if (line[i] == '+') | |
630 | color = DIFF_FILE_NEW; | |
631 | } | |
632 | ||
633 | if (color != DIFF_FILE_NEW) { | |
c0c77734 DB |
634 | emit_line(ecbdata->file, |
635 | diff_get_color(ecbdata->color_diff, color), | |
448c3ef1 JH |
636 | reset, line, len); |
637 | return; | |
638 | } | |
639 | emit_add_line(reset, ecbdata, line, len); | |
6973dcae JH |
640 | } |
641 | ||
642 | static char *pprint_rename(const char *a, const char *b) | |
643 | { | |
644 | const char *old = a; | |
645 | const char *new = b; | |
663af342 | 646 | struct strbuf name; |
6973dcae JH |
647 | int pfx_length, sfx_length; |
648 | int len_a = strlen(a); | |
649 | int len_b = strlen(b); | |
663af342 | 650 | int a_midlen, b_midlen; |
e5bfbf9b AJ |
651 | int qlen_a = quote_c_style(a, NULL, NULL, 0); |
652 | int qlen_b = quote_c_style(b, NULL, NULL, 0); | |
653 | ||
663af342 | 654 | strbuf_init(&name, 0); |
e5bfbf9b | 655 | if (qlen_a || qlen_b) { |
663af342 PH |
656 | quote_c_style(a, &name, NULL, 0); |
657 | strbuf_addstr(&name, " => "); | |
658 | quote_c_style(b, &name, NULL, 0); | |
b315c5c0 | 659 | return strbuf_detach(&name, NULL); |
e5bfbf9b | 660 | } |
6973dcae JH |
661 | |
662 | /* Find common prefix */ | |
663 | pfx_length = 0; | |
664 | while (*old && *new && *old == *new) { | |
665 | if (*old == '/') | |
666 | pfx_length = old - a + 1; | |
667 | old++; | |
668 | new++; | |
669 | } | |
670 | ||
671 | /* Find common suffix */ | |
672 | old = a + len_a; | |
673 | new = b + len_b; | |
674 | sfx_length = 0; | |
675 | while (a <= old && b <= new && *old == *new) { | |
676 | if (*old == '/') | |
677 | sfx_length = len_a - (old - a); | |
678 | old--; | |
679 | new--; | |
680 | } | |
681 | ||
682 | /* | |
683 | * pfx{mid-a => mid-b}sfx | |
684 | * {pfx-a => pfx-b}sfx | |
685 | * pfx{sfx-a => sfx-b} | |
686 | * name-a => name-b | |
687 | */ | |
663af342 PH |
688 | a_midlen = len_a - pfx_length - sfx_length; |
689 | b_midlen = len_b - pfx_length - sfx_length; | |
690 | if (a_midlen < 0) | |
691 | a_midlen = 0; | |
692 | if (b_midlen < 0) | |
693 | b_midlen = 0; | |
694 | ||
695 | strbuf_grow(&name, pfx_length + a_midlen + b_midlen + sfx_length + 7); | |
6973dcae | 696 | if (pfx_length + sfx_length) { |
663af342 PH |
697 | strbuf_add(&name, a, pfx_length); |
698 | strbuf_addch(&name, '{'); | |
6973dcae | 699 | } |
663af342 PH |
700 | strbuf_add(&name, a + pfx_length, a_midlen); |
701 | strbuf_addstr(&name, " => "); | |
702 | strbuf_add(&name, b + pfx_length, b_midlen); | |
703 | if (pfx_length + sfx_length) { | |
704 | strbuf_addch(&name, '}'); | |
705 | strbuf_add(&name, a + len_a - sfx_length, sfx_length); | |
6973dcae | 706 | } |
b315c5c0 | 707 | return strbuf_detach(&name, NULL); |
6973dcae JH |
708 | } |
709 | ||
710 | struct diffstat_t { | |
711 | struct xdiff_emit_state xm; | |
712 | ||
713 | int nr; | |
714 | int alloc; | |
715 | struct diffstat_file { | |
f604652e | 716 | char *from_name; |
6973dcae | 717 | char *name; |
f604652e | 718 | char *print_name; |
6973dcae JH |
719 | unsigned is_unmerged:1; |
720 | unsigned is_binary:1; | |
721 | unsigned is_renamed:1; | |
722 | unsigned int added, deleted; | |
723 | } **files; | |
724 | }; | |
725 | ||
726 | static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat, | |
727 | const char *name_a, | |
728 | const char *name_b) | |
729 | { | |
730 | struct diffstat_file *x; | |
731 | x = xcalloc(sizeof (*x), 1); | |
732 | if (diffstat->nr == diffstat->alloc) { | |
733 | diffstat->alloc = alloc_nr(diffstat->alloc); | |
734 | diffstat->files = xrealloc(diffstat->files, | |
735 | diffstat->alloc * sizeof(x)); | |
736 | } | |
737 | diffstat->files[diffstat->nr++] = x; | |
738 | if (name_b) { | |
f604652e JH |
739 | x->from_name = xstrdup(name_a); |
740 | x->name = xstrdup(name_b); | |
6973dcae JH |
741 | x->is_renamed = 1; |
742 | } | |
f604652e JH |
743 | else { |
744 | x->from_name = NULL; | |
9befac47 | 745 | x->name = xstrdup(name_a); |
f604652e | 746 | } |
6973dcae JH |
747 | return x; |
748 | } | |
749 | ||
750 | static void diffstat_consume(void *priv, char *line, unsigned long len) | |
751 | { | |
752 | struct diffstat_t *diffstat = priv; | |
753 | struct diffstat_file *x = diffstat->files[diffstat->nr - 1]; | |
754 | ||
755 | if (line[0] == '+') | |
756 | x->added++; | |
757 | else if (line[0] == '-') | |
758 | x->deleted++; | |
759 | } | |
760 | ||
698ce6f8 | 761 | const char mime_boundary_leader[] = "------------"; |
6973dcae | 762 | |
a2540023 JH |
763 | static int scale_linear(int it, int width, int max_change) |
764 | { | |
765 | /* | |
3ed74e60 JS |
766 | * make sure that at least one '-' is printed if there were deletions, |
767 | * and likewise for '+'. | |
a2540023 | 768 | */ |
3ed74e60 JS |
769 | if (max_change < 2) |
770 | return it; | |
771 | return ((it - 1) * (width - 1) + max_change - 1) / (max_change - 1); | |
a2540023 JH |
772 | } |
773 | ||
c0c77734 DB |
774 | static void show_name(FILE *file, |
775 | const char *prefix, const char *name, int len, | |
785f7432 | 776 | const char *reset, const char *set) |
a2540023 | 777 | { |
c0c77734 | 778 | fprintf(file, " %s%s%-*s%s |", set, prefix, len, name, reset); |
a2540023 JH |
779 | } |
780 | ||
c0c77734 | 781 | static void show_graph(FILE *file, char ch, int cnt, const char *set, const char *reset) |
a2540023 JH |
782 | { |
783 | if (cnt <= 0) | |
784 | return; | |
c0c77734 | 785 | fprintf(file, "%s", set); |
a2540023 | 786 | while (cnt--) |
c0c77734 DB |
787 | putc(ch, file); |
788 | fprintf(file, "%s", reset); | |
a2540023 JH |
789 | } |
790 | ||
f604652e JH |
791 | static void fill_print_name(struct diffstat_file *file) |
792 | { | |
793 | char *pname; | |
794 | ||
795 | if (file->print_name) | |
796 | return; | |
797 | ||
798 | if (!file->is_renamed) { | |
799 | struct strbuf buf; | |
800 | strbuf_init(&buf, 0); | |
801 | if (quote_c_style(file->name, &buf, NULL, 0)) { | |
802 | pname = strbuf_detach(&buf, NULL); | |
803 | } else { | |
804 | pname = file->name; | |
805 | strbuf_release(&buf); | |
806 | } | |
807 | } else { | |
808 | pname = pprint_rename(file->from_name, file->name); | |
809 | } | |
810 | file->print_name = pname; | |
811 | } | |
812 | ||
a2540023 | 813 | static void show_stats(struct diffstat_t* data, struct diff_options *options) |
6973dcae | 814 | { |
6973dcae | 815 | int i, len, add, del, total, adds = 0, dels = 0; |
a2540023 | 816 | int max_change = 0, max_len = 0; |
6973dcae | 817 | int total_files = data->nr; |
a2540023 | 818 | int width, name_width; |
785f7432 | 819 | const char *reset, *set, *add_c, *del_c; |
6973dcae JH |
820 | |
821 | if (data->nr == 0) | |
822 | return; | |
823 | ||
a2540023 JH |
824 | width = options->stat_width ? options->stat_width : 80; |
825 | name_width = options->stat_name_width ? options->stat_name_width : 50; | |
826 | ||
827 | /* Sanity: give at least 5 columns to the graph, | |
828 | * but leave at least 10 columns for the name. | |
829 | */ | |
830 | if (width < name_width + 15) { | |
831 | if (name_width <= 25) | |
832 | width = name_width + 15; | |
833 | else | |
834 | name_width = width - 15; | |
835 | } | |
836 | ||
837 | /* Find the longest filename and max number of changes */ | |
8f67f8ae PH |
838 | reset = diff_get_color_opt(options, DIFF_RESET); |
839 | set = diff_get_color_opt(options, DIFF_PLAIN); | |
840 | add_c = diff_get_color_opt(options, DIFF_FILE_NEW); | |
841 | del_c = diff_get_color_opt(options, DIFF_FILE_OLD); | |
785f7432 | 842 | |
6973dcae JH |
843 | for (i = 0; i < data->nr; i++) { |
844 | struct diffstat_file *file = data->files[i]; | |
a2540023 | 845 | int change = file->added + file->deleted; |
f604652e JH |
846 | fill_print_name(file); |
847 | len = strlen(file->print_name); | |
6973dcae JH |
848 | if (max_len < len) |
849 | max_len = len; | |
850 | ||
851 | if (file->is_binary || file->is_unmerged) | |
852 | continue; | |
a2540023 JH |
853 | if (max_change < change) |
854 | max_change = change; | |
6973dcae JH |
855 | } |
856 | ||
a2540023 JH |
857 | /* Compute the width of the graph part; |
858 | * 10 is for one blank at the beginning of the line plus | |
859 | * " | count " between the name and the graph. | |
860 | * | |
861 | * From here on, name_width is the width of the name area, | |
862 | * and width is the width of the graph area. | |
863 | */ | |
864 | name_width = (name_width < max_len) ? name_width : max_len; | |
865 | if (width < (name_width + 10) + max_change) | |
866 | width = width - (name_width + 10); | |
867 | else | |
868 | width = max_change; | |
869 | ||
6973dcae | 870 | for (i = 0; i < data->nr; i++) { |
d2543b8e | 871 | const char *prefix = ""; |
f604652e | 872 | char *name = data->files[i]->print_name; |
6973dcae JH |
873 | int added = data->files[i]->added; |
874 | int deleted = data->files[i]->deleted; | |
a2540023 | 875 | int name_len; |
6973dcae JH |
876 | |
877 | /* | |
878 | * "scale" the filename | |
879 | */ | |
a2540023 JH |
880 | len = name_width; |
881 | name_len = strlen(name); | |
882 | if (name_width < name_len) { | |
6973dcae JH |
883 | char *slash; |
884 | prefix = "..."; | |
a2540023 JH |
885 | len -= 3; |
886 | name += name_len - len; | |
6973dcae JH |
887 | slash = strchr(name, '/'); |
888 | if (slash) | |
889 | name = slash; | |
890 | } | |
6973dcae JH |
891 | |
892 | if (data->files[i]->is_binary) { | |
c0c77734 DB |
893 | show_name(options->file, prefix, name, len, reset, set); |
894 | fprintf(options->file, " Bin "); | |
895 | fprintf(options->file, "%s%d%s", del_c, deleted, reset); | |
896 | fprintf(options->file, " -> "); | |
897 | fprintf(options->file, "%s%d%s", add_c, added, reset); | |
898 | fprintf(options->file, " bytes"); | |
899 | fprintf(options->file, "\n"); | |
f604652e | 900 | continue; |
6973dcae JH |
901 | } |
902 | else if (data->files[i]->is_unmerged) { | |
c0c77734 DB |
903 | show_name(options->file, prefix, name, len, reset, set); |
904 | fprintf(options->file, " Unmerged\n"); | |
f604652e | 905 | continue; |
6973dcae JH |
906 | } |
907 | else if (!data->files[i]->is_renamed && | |
908 | (added + deleted == 0)) { | |
909 | total_files--; | |
f604652e | 910 | continue; |
6973dcae JH |
911 | } |
912 | ||
a2540023 JH |
913 | /* |
914 | * scale the add/delete | |
915 | */ | |
6973dcae JH |
916 | add = added; |
917 | del = deleted; | |
918 | total = add + del; | |
919 | adds += add; | |
920 | dels += del; | |
921 | ||
a2540023 | 922 | if (width <= max_change) { |
a2540023 | 923 | add = scale_linear(add, width, max_change); |
3ed74e60 JS |
924 | del = scale_linear(del, width, max_change); |
925 | total = add + del; | |
6973dcae | 926 | } |
c0c77734 DB |
927 | show_name(options->file, prefix, name, len, reset, set); |
928 | fprintf(options->file, "%5d ", added + deleted); | |
929 | show_graph(options->file, '+', add, add_c, reset); | |
930 | show_graph(options->file, '-', del, del_c, reset); | |
931 | fprintf(options->file, "\n"); | |
932 | } | |
933 | fprintf(options->file, | |
934 | "%s %d files changed, %d insertions(+), %d deletions(-)%s\n", | |
785f7432 | 935 | set, total_files, adds, dels, reset); |
6973dcae JH |
936 | } |
937 | ||
c0c77734 | 938 | static void show_shortstats(struct diffstat_t* data, struct diff_options *options) |
ebd124c6 NP |
939 | { |
940 | int i, adds = 0, dels = 0, total_files = data->nr; | |
941 | ||
942 | if (data->nr == 0) | |
943 | return; | |
944 | ||
945 | for (i = 0; i < data->nr; i++) { | |
946 | if (!data->files[i]->is_binary && | |
947 | !data->files[i]->is_unmerged) { | |
948 | int added = data->files[i]->added; | |
949 | int deleted= data->files[i]->deleted; | |
950 | if (!data->files[i]->is_renamed && | |
951 | (added + deleted == 0)) { | |
952 | total_files--; | |
953 | } else { | |
954 | adds += added; | |
955 | dels += deleted; | |
956 | } | |
957 | } | |
ebd124c6 | 958 | } |
c0c77734 | 959 | fprintf(options->file, " %d files changed, %d insertions(+), %d deletions(-)\n", |
ebd124c6 NP |
960 | total_files, adds, dels); |
961 | } | |
962 | ||
74e2abe5 JH |
963 | static void show_numstat(struct diffstat_t* data, struct diff_options *options) |
964 | { | |
965 | int i; | |
966 | ||
f604652e JH |
967 | if (data->nr == 0) |
968 | return; | |
969 | ||
74e2abe5 JH |
970 | for (i = 0; i < data->nr; i++) { |
971 | struct diffstat_file *file = data->files[i]; | |
972 | ||
bfddbc5e | 973 | if (file->is_binary) |
c0c77734 | 974 | fprintf(options->file, "-\t-\t"); |
bfddbc5e | 975 | else |
c0c77734 DB |
976 | fprintf(options->file, |
977 | "%d\t%d\t", file->added, file->deleted); | |
f604652e JH |
978 | if (options->line_termination) { |
979 | fill_print_name(file); | |
980 | if (!file->is_renamed) | |
c0c77734 | 981 | write_name_quoted(file->name, options->file, |
f604652e JH |
982 | options->line_termination); |
983 | else { | |
c0c77734 DB |
984 | fputs(file->print_name, options->file); |
985 | putc(options->line_termination, options->file); | |
f604652e | 986 | } |
663af342 | 987 | } else { |
f604652e | 988 | if (file->is_renamed) { |
c0c77734 DB |
989 | putc('\0', options->file); |
990 | write_name_quoted(file->from_name, options->file, '\0'); | |
f604652e | 991 | } |
c0c77734 | 992 | write_name_quoted(file->name, options->file, '\0'); |
663af342 | 993 | } |
74e2abe5 JH |
994 | } |
995 | } | |
996 | ||
c04a7155 JH |
997 | struct dirstat_file { |
998 | const char *name; | |
999 | unsigned long changed; | |
7df7c019 LT |
1000 | }; |
1001 | ||
c04a7155 JH |
1002 | struct dirstat_dir { |
1003 | struct dirstat_file *files; | |
1004 | int alloc, nr, percent, cumulative; | |
1005 | }; | |
1006 | ||
1007 | static long gather_dirstat(FILE *file, struct dirstat_dir *dir, unsigned long changed, const char *base, int baselen) | |
7df7c019 LT |
1008 | { |
1009 | unsigned long this_dir = 0; | |
1010 | unsigned int sources = 0; | |
1011 | ||
1012 | while (dir->nr) { | |
c04a7155 | 1013 | struct dirstat_file *f = dir->files; |
7df7c019 LT |
1014 | int namelen = strlen(f->name); |
1015 | unsigned long this; | |
1016 | char *slash; | |
1017 | ||
1018 | if (namelen < baselen) | |
1019 | break; | |
1020 | if (memcmp(f->name, base, baselen)) | |
1021 | break; | |
1022 | slash = strchr(f->name + baselen, '/'); | |
1023 | if (slash) { | |
1024 | int newbaselen = slash + 1 - f->name; | |
c0c77734 | 1025 | this = gather_dirstat(file, dir, changed, f->name, newbaselen); |
7df7c019 LT |
1026 | sources++; |
1027 | } else { | |
c04a7155 | 1028 | this = f->changed; |
7df7c019 LT |
1029 | dir->files++; |
1030 | dir->nr--; | |
1031 | sources += 2; | |
1032 | } | |
1033 | this_dir += this; | |
1034 | } | |
1035 | ||
1036 | /* | |
1037 | * We don't report dirstat's for | |
1038 | * - the top level | |
1039 | * - or cases where everything came from a single directory | |
1040 | * under this directory (sources == 1). | |
1041 | */ | |
1042 | if (baselen && sources != 1) { | |
1043 | int permille = this_dir * 1000 / changed; | |
1044 | if (permille) { | |
1045 | int percent = permille / 10; | |
1046 | if (percent >= dir->percent) { | |
c0c77734 | 1047 | fprintf(file, "%4d.%01d%% %.*s\n", percent, permille % 10, baselen, base); |
7df7c019 LT |
1048 | if (!dir->cumulative) |
1049 | return 0; | |
1050 | } | |
1051 | } | |
1052 | } | |
1053 | return this_dir; | |
1054 | } | |
1055 | ||
c04a7155 | 1056 | static void show_dirstat(struct diff_options *options) |
7df7c019 LT |
1057 | { |
1058 | int i; | |
1059 | unsigned long changed; | |
c04a7155 JH |
1060 | struct dirstat_dir dir; |
1061 | struct diff_queue_struct *q = &diff_queued_diff; | |
1062 | ||
1063 | dir.files = NULL; | |
1064 | dir.alloc = 0; | |
1065 | dir.nr = 0; | |
1066 | dir.percent = options->dirstat_percent; | |
1067 | dir.cumulative = options->output_format & DIFF_FORMAT_CUMULATIVE; | |
7df7c019 | 1068 | |
7df7c019 | 1069 | changed = 0; |
c04a7155 JH |
1070 | for (i = 0; i < q->nr; i++) { |
1071 | struct diff_filepair *p = q->queue[i]; | |
1072 | const char *name; | |
1073 | unsigned long copied, added, damage; | |
1074 | ||
1075 | name = p->one->path ? p->one->path : p->two->path; | |
1076 | ||
1077 | if (DIFF_FILE_VALID(p->one) && DIFF_FILE_VALID(p->two)) { | |
1078 | diff_populate_filespec(p->one, 0); | |
1079 | diff_populate_filespec(p->two, 0); | |
1080 | diffcore_count_changes(p->one, p->two, NULL, NULL, 0, | |
1081 | &copied, &added); | |
1082 | diff_free_filespec_data(p->one); | |
1083 | diff_free_filespec_data(p->two); | |
1084 | } else if (DIFF_FILE_VALID(p->one)) { | |
1085 | diff_populate_filespec(p->one, 1); | |
1086 | copied = added = 0; | |
1087 | diff_free_filespec_data(p->one); | |
1088 | } else if (DIFF_FILE_VALID(p->two)) { | |
1089 | diff_populate_filespec(p->two, 1); | |
1090 | copied = 0; | |
1091 | added = p->two->size; | |
1092 | diff_free_filespec_data(p->two); | |
1093 | } else | |
2b0b551d | 1094 | continue; |
c04a7155 JH |
1095 | |
1096 | /* | |
1097 | * Original minus copied is the removed material, | |
1098 | * added is the new material. They are both damages | |
1099 | * made to the preimage. | |
1100 | */ | |
1101 | damage = (p->one->size - copied) + added; | |
1102 | ||
1103 | ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); | |
1104 | dir.files[dir.nr].name = name; | |
1105 | dir.files[dir.nr].changed = damage; | |
1106 | changed += damage; | |
1107 | dir.nr++; | |
7df7c019 LT |
1108 | } |
1109 | ||
1110 | /* This can happen even with many files, if everything was renames */ | |
1111 | if (!changed) | |
1112 | return; | |
1113 | ||
1114 | /* Show all directories with more than x% of the changes */ | |
c0c77734 | 1115 | gather_dirstat(options->file, &dir, changed, "", 0); |
7df7c019 LT |
1116 | } |
1117 | ||
f604652e JH |
1118 | static void free_diffstat_info(struct diffstat_t *diffstat) |
1119 | { | |
1120 | int i; | |
1121 | for (i = 0; i < diffstat->nr; i++) { | |
1122 | struct diffstat_file *f = diffstat->files[i]; | |
1123 | if (f->name != f->print_name) | |
1124 | free(f->print_name); | |
1125 | free(f->name); | |
1126 | free(f->from_name); | |
1127 | free(f); | |
1128 | } | |
1129 | free(diffstat->files); | |
1130 | } | |
1131 | ||
88246898 JS |
1132 | struct checkdiff_t { |
1133 | struct xdiff_emit_state xm; | |
1134 | const char *filename; | |
c5a8c3ec | 1135 | int lineno, color_diff; |
cf1b7869 | 1136 | unsigned ws_rule; |
62c64895 | 1137 | unsigned status; |
c0c77734 | 1138 | FILE *file; |
88246898 JS |
1139 | }; |
1140 | ||
1141 | static void checkdiff_consume(void *priv, char *line, unsigned long len) | |
1142 | { | |
1143 | struct checkdiff_t *data = priv; | |
c5a8c3ec JS |
1144 | const char *ws = diff_get_color(data->color_diff, DIFF_WHITESPACE); |
1145 | const char *reset = diff_get_color(data->color_diff, DIFF_RESET); | |
1146 | const char *set = diff_get_color(data->color_diff, DIFF_FILE_NEW); | |
c1795bb0 | 1147 | char *err; |
88246898 JS |
1148 | |
1149 | if (line[0] == '+') { | |
18374e58 | 1150 | unsigned bad; |
0ef617f4 | 1151 | data->lineno++; |
18374e58 | 1152 | bad = check_and_emit_line(line + 1, len - 1, |
c1795bb0 | 1153 | data->ws_rule, NULL, NULL, NULL, NULL); |
18374e58 | 1154 | if (!bad) |
c1795bb0 | 1155 | return; |
18374e58 JH |
1156 | data->status |= bad; |
1157 | err = whitespace_error_string(bad); | |
c0c77734 | 1158 | fprintf(data->file, "%s:%d: %s.\n", data->filename, data->lineno, err); |
c1795bb0 | 1159 | free(err); |
c0c77734 | 1160 | emit_line(data->file, set, reset, line, 1); |
c1795bb0 | 1161 | (void)check_and_emit_line(line + 1, len - 1, data->ws_rule, |
c0c77734 | 1162 | data->file, set, reset, ws); |
88246898 JS |
1163 | } else if (line[0] == ' ') |
1164 | data->lineno++; | |
1165 | else if (line[0] == '@') { | |
1166 | char *plus = strchr(line, '+'); | |
1167 | if (plus) | |
0ef617f4 | 1168 | data->lineno = strtol(plus, NULL, 10) - 1; |
88246898 JS |
1169 | else |
1170 | die("invalid diff"); | |
1171 | } | |
1172 | } | |
1173 | ||
0660626c JH |
1174 | static unsigned char *deflate_it(char *data, |
1175 | unsigned long size, | |
1176 | unsigned long *result_size) | |
051308f6 | 1177 | { |
0660626c JH |
1178 | int bound; |
1179 | unsigned char *deflated; | |
1180 | z_stream stream; | |
1181 | ||
1182 | memset(&stream, 0, sizeof(stream)); | |
12f6c308 | 1183 | deflateInit(&stream, zlib_compression_level); |
0660626c JH |
1184 | bound = deflateBound(&stream, size); |
1185 | deflated = xmalloc(bound); | |
1186 | stream.next_out = deflated; | |
1187 | stream.avail_out = bound; | |
1188 | ||
1189 | stream.next_in = (unsigned char *)data; | |
1190 | stream.avail_in = size; | |
1191 | while (deflate(&stream, Z_FINISH) == Z_OK) | |
1192 | ; /* nothing */ | |
1193 | deflateEnd(&stream); | |
1194 | *result_size = stream.total_out; | |
1195 | return deflated; | |
051308f6 JH |
1196 | } |
1197 | ||
c0c77734 | 1198 | static void emit_binary_diff_body(FILE *file, mmfile_t *one, mmfile_t *two) |
051308f6 | 1199 | { |
0660626c JH |
1200 | void *cp; |
1201 | void *delta; | |
1202 | void *deflated; | |
1203 | void *data; | |
1204 | unsigned long orig_size; | |
1205 | unsigned long delta_size; | |
1206 | unsigned long deflate_size; | |
1207 | unsigned long data_size; | |
051308f6 | 1208 | |
0660626c JH |
1209 | /* We could do deflated delta, or we could do just deflated two, |
1210 | * whichever is smaller. | |
051308f6 | 1211 | */ |
0660626c JH |
1212 | delta = NULL; |
1213 | deflated = deflate_it(two->ptr, two->size, &deflate_size); | |
1214 | if (one->size && two->size) { | |
1215 | delta = diff_delta(one->ptr, one->size, | |
1216 | two->ptr, two->size, | |
1217 | &delta_size, deflate_size); | |
1218 | if (delta) { | |
1219 | void *to_free = delta; | |
1220 | orig_size = delta_size; | |
1221 | delta = deflate_it(delta, delta_size, &delta_size); | |
1222 | free(to_free); | |
051308f6 JH |
1223 | } |
1224 | } | |
051308f6 | 1225 | |
0660626c | 1226 | if (delta && delta_size < deflate_size) { |
c0c77734 | 1227 | fprintf(file, "delta %lu\n", orig_size); |
0660626c JH |
1228 | free(deflated); |
1229 | data = delta; | |
1230 | data_size = delta_size; | |
1231 | } | |
1232 | else { | |
c0c77734 | 1233 | fprintf(file, "literal %lu\n", two->size); |
0660626c JH |
1234 | free(delta); |
1235 | data = deflated; | |
1236 | data_size = deflate_size; | |
1237 | } | |
051308f6 | 1238 | |
0660626c JH |
1239 | /* emit data encoded in base85 */ |
1240 | cp = data; | |
1241 | while (data_size) { | |
1242 | int bytes = (52 < data_size) ? 52 : data_size; | |
051308f6 | 1243 | char line[70]; |
0660626c | 1244 | data_size -= bytes; |
051308f6 JH |
1245 | if (bytes <= 26) |
1246 | line[0] = bytes + 'A' - 1; | |
1247 | else | |
1248 | line[0] = bytes - 26 + 'a' - 1; | |
1249 | encode_85(line + 1, cp, bytes); | |
1d7f171c | 1250 | cp = (char *) cp + bytes; |
c0c77734 DB |
1251 | fputs(line, file); |
1252 | fputc('\n', file); | |
051308f6 | 1253 | } |
c0c77734 | 1254 | fprintf(file, "\n"); |
0660626c | 1255 | free(data); |
051308f6 JH |
1256 | } |
1257 | ||
c0c77734 | 1258 | static void emit_binary_diff(FILE *file, mmfile_t *one, mmfile_t *two) |
d4c452f0 | 1259 | { |
c0c77734 DB |
1260 | fprintf(file, "GIT binary patch\n"); |
1261 | emit_binary_diff_body(file, one, two); | |
1262 | emit_binary_diff_body(file, two, one); | |
d4c452f0 JH |
1263 | } |
1264 | ||
8c701249 JH |
1265 | static void setup_diff_attr_check(struct git_attr_check *check) |
1266 | { | |
1267 | static struct git_attr *attr_diff; | |
1268 | ||
29a3eefd | 1269 | if (!attr_diff) { |
8c701249 | 1270 | attr_diff = git_attr("diff", 4); |
29a3eefd JH |
1271 | } |
1272 | check[0].attr = attr_diff; | |
8c701249 JH |
1273 | } |
1274 | ||
29a3eefd | 1275 | static void diff_filespec_check_attr(struct diff_filespec *one) |
6973dcae | 1276 | { |
e0e324a4 | 1277 | struct git_attr_check attr_diff_check; |
2c3fa66f | 1278 | int check_from_data = 0; |
8c701249 | 1279 | |
29a3eefd JH |
1280 | if (one->checked_attr) |
1281 | return; | |
1282 | ||
e0e324a4 | 1283 | setup_diff_attr_check(&attr_diff_check); |
29a3eefd | 1284 | one->is_binary = 0; |
e0e324a4 | 1285 | one->funcname_pattern_ident = NULL; |
29a3eefd | 1286 | |
e0e324a4 | 1287 | if (!git_checkattr(one->path, 1, &attr_diff_check)) { |
29a3eefd JH |
1288 | const char *value; |
1289 | ||
1290 | /* binaryness */ | |
e0e324a4 | 1291 | value = attr_diff_check.value; |
515106fa | 1292 | if (ATTR_TRUE(value)) |
29a3eefd | 1293 | ; |
515106fa | 1294 | else if (ATTR_FALSE(value)) |
29a3eefd | 1295 | one->is_binary = 1; |
2c3fa66f JH |
1296 | else |
1297 | check_from_data = 1; | |
f258475a | 1298 | |
e0e324a4 | 1299 | /* funcname pattern ident */ |
f258475a JH |
1300 | if (ATTR_TRUE(value) || ATTR_FALSE(value) || ATTR_UNSET(value)) |
1301 | ; | |
1302 | else | |
e0e324a4 | 1303 | one->funcname_pattern_ident = value; |
515106fa | 1304 | } |
40250af4 | 1305 | |
2c3fa66f JH |
1306 | if (check_from_data) { |
1307 | if (!one->data && DIFF_FILE_VALID(one)) | |
1308 | diff_populate_filespec(one, 0); | |
29a3eefd | 1309 | |
2c3fa66f JH |
1310 | if (one->data) |
1311 | one->is_binary = buffer_is_binary(one->data, one->size); | |
1312 | } | |
29a3eefd JH |
1313 | } |
1314 | ||
1315 | int diff_filespec_is_binary(struct diff_filespec *one) | |
1316 | { | |
1317 | diff_filespec_check_attr(one); | |
1318 | return one->is_binary; | |
6973dcae JH |
1319 | } |
1320 | ||
e0e324a4 | 1321 | static const char *funcname_pattern(const char *ident) |
f258475a | 1322 | { |
e0e324a4 | 1323 | struct funcname_pattern *pp; |
f258475a | 1324 | |
e0e324a4 JH |
1325 | for (pp = funcname_pattern_list; pp; pp = pp->next) |
1326 | if (!strcmp(ident, pp->name)) | |
1327 | return pp->pattern; | |
f258475a JH |
1328 | return NULL; |
1329 | } | |
1330 | ||
d3a93dc9 JH |
1331 | static struct builtin_funcname_pattern { |
1332 | const char *name; | |
1333 | const char *pattern; | |
1334 | } builtin_funcname_pattern[] = { | |
1335 | { "java", "!^[ ]*\\(catch\\|do\\|for\\|if\\|instanceof\\|" | |
1336 | "new\\|return\\|switch\\|throw\\|while\\)\n" | |
1337 | "^[ ]*\\(\\([ ]*" | |
1338 | "[A-Za-z_][A-Za-z_0-9]*\\)\\{2,\\}" | |
14a5c7c1 | 1339 | "[ ]*([^;]*\\)$" }, |
d3a93dc9 JH |
1340 | { "tex", "^\\(\\\\\\(sub\\)*section{.*\\)$" }, |
1341 | }; | |
1342 | ||
e0e324a4 | 1343 | static const char *diff_funcname_pattern(struct diff_filespec *one) |
f258475a | 1344 | { |
e0e324a4 | 1345 | const char *ident, *pattern; |
d3a93dc9 | 1346 | int i; |
f258475a JH |
1347 | |
1348 | diff_filespec_check_attr(one); | |
e0e324a4 | 1349 | ident = one->funcname_pattern_ident; |
f258475a JH |
1350 | |
1351 | if (!ident) | |
1352 | /* | |
1353 | * If the config file has "funcname.default" defined, that | |
1354 | * regexp is used; otherwise NULL is returned and xemit uses | |
1355 | * the built-in default. | |
1356 | */ | |
e0e324a4 | 1357 | return funcname_pattern("default"); |
f258475a JH |
1358 | |
1359 | /* Look up custom "funcname.$ident" regexp from config. */ | |
e0e324a4 JH |
1360 | pattern = funcname_pattern(ident); |
1361 | if (pattern) | |
1362 | return pattern; | |
f258475a JH |
1363 | |
1364 | /* | |
1365 | * And define built-in fallback patterns here. Note that | |
9f6fe822 | 1366 | * these can be overridden by the user's config settings. |
f258475a | 1367 | */ |
d3a93dc9 JH |
1368 | for (i = 0; i < ARRAY_SIZE(builtin_funcname_pattern); i++) |
1369 | if (!strcmp(ident, builtin_funcname_pattern[i].name)) | |
1370 | return builtin_funcname_pattern[i].pattern; | |
f258475a JH |
1371 | |
1372 | return NULL; | |
1373 | } | |
1374 | ||
6973dcae JH |
1375 | static void builtin_diff(const char *name_a, |
1376 | const char *name_b, | |
1377 | struct diff_filespec *one, | |
1378 | struct diff_filespec *two, | |
1379 | const char *xfrm_msg, | |
051308f6 | 1380 | struct diff_options *o, |
6973dcae JH |
1381 | int complete_rewrite) |
1382 | { | |
1383 | mmfile_t mf1, mf2; | |
1384 | const char *lbl[2]; | |
1385 | char *a_one, *b_two; | |
8f67f8ae PH |
1386 | const char *set = diff_get_color_opt(o, DIFF_METAINFO); |
1387 | const char *reset = diff_get_color_opt(o, DIFF_RESET); | |
6973dcae | 1388 | |
eab9a40b JS |
1389 | a_one = quote_two(o->a_prefix, name_a + (*name_a == '/')); |
1390 | b_two = quote_two(o->b_prefix, name_b + (*name_b == '/')); | |
6973dcae JH |
1391 | lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null"; |
1392 | lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null"; | |
c0c77734 | 1393 | fprintf(o->file, "%sdiff --git %s %s%s\n", set, a_one, b_two, reset); |
6973dcae JH |
1394 | if (lbl[0][0] == '/') { |
1395 | /* /dev/null */ | |
c0c77734 | 1396 | fprintf(o->file, "%snew file mode %06o%s\n", set, two->mode, reset); |
50f575fc | 1397 | if (xfrm_msg && xfrm_msg[0]) |
c0c77734 | 1398 | fprintf(o->file, "%s%s%s\n", set, xfrm_msg, reset); |
6973dcae JH |
1399 | } |
1400 | else if (lbl[1][0] == '/') { | |
c0c77734 | 1401 | fprintf(o->file, "%sdeleted file mode %06o%s\n", set, one->mode, reset); |
50f575fc | 1402 | if (xfrm_msg && xfrm_msg[0]) |
c0c77734 | 1403 | fprintf(o->file, "%s%s%s\n", set, xfrm_msg, reset); |
6973dcae JH |
1404 | } |
1405 | else { | |
1406 | if (one->mode != two->mode) { | |
c0c77734 DB |
1407 | fprintf(o->file, "%sold mode %06o%s\n", set, one->mode, reset); |
1408 | fprintf(o->file, "%snew mode %06o%s\n", set, two->mode, reset); | |
cd112cef | 1409 | } |
50f575fc | 1410 | if (xfrm_msg && xfrm_msg[0]) |
c0c77734 | 1411 | fprintf(o->file, "%s%s%s\n", set, xfrm_msg, reset); |
6973dcae JH |
1412 | /* |
1413 | * we do not run diff between different kind | |
1414 | * of objects. | |
1415 | */ | |
1416 | if ((one->mode ^ two->mode) & S_IFMT) | |
1417 | goto free_ab_and_return; | |
1418 | if (complete_rewrite) { | |
eab9a40b | 1419 | emit_rewrite_diff(name_a, name_b, one, two, o); |
34a5e1a2 | 1420 | o->found_changes = 1; |
6973dcae JH |
1421 | goto free_ab_and_return; |
1422 | } | |
1423 | } | |
1424 | ||
1425 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
1426 | die("unable to read files to diff"); | |
1427 | ||
8f67f8ae | 1428 | if (!DIFF_OPT_TST(o, TEXT) && |
29a3eefd | 1429 | (diff_filespec_is_binary(one) || diff_filespec_is_binary(two))) { |
0660626c JH |
1430 | /* Quite common confusing case */ |
1431 | if (mf1.size == mf2.size && | |
1432 | !memcmp(mf1.ptr, mf2.ptr, mf1.size)) | |
1433 | goto free_ab_and_return; | |
8f67f8ae | 1434 | if (DIFF_OPT_TST(o, BINARY)) |
c0c77734 | 1435 | emit_binary_diff(o->file, &mf1, &mf2); |
051308f6 | 1436 | else |
c0c77734 DB |
1437 | fprintf(o->file, "Binary files %s and %s differ\n", |
1438 | lbl[0], lbl[1]); | |
34a5e1a2 | 1439 | o->found_changes = 1; |
051308f6 | 1440 | } |
6973dcae JH |
1441 | else { |
1442 | /* Crazy xdl interfaces.. */ | |
1443 | const char *diffopts = getenv("GIT_DIFF_OPTS"); | |
1444 | xpparam_t xpp; | |
1445 | xdemitconf_t xecfg; | |
1446 | xdemitcb_t ecb; | |
1447 | struct emit_callback ecbdata; | |
e0e324a4 | 1448 | const char *funcname_pattern; |
f258475a | 1449 | |
e0e324a4 JH |
1450 | funcname_pattern = diff_funcname_pattern(one); |
1451 | if (!funcname_pattern) | |
1452 | funcname_pattern = diff_funcname_pattern(two); | |
6973dcae | 1453 | |
30b25010 | 1454 | memset(&xecfg, 0, sizeof(xecfg)); |
cd112cef | 1455 | memset(&ecbdata, 0, sizeof(ecbdata)); |
6973dcae | 1456 | ecbdata.label_path = lbl; |
8f67f8ae | 1457 | ecbdata.color_diff = DIFF_OPT_TST(o, COLOR_DIFF); |
34a5e1a2 | 1458 | ecbdata.found_changesp = &o->found_changes; |
cf1b7869 | 1459 | ecbdata.ws_rule = whitespace_rule(name_b ? name_b : name_a); |
c0c77734 | 1460 | ecbdata.file = o->file; |
0d21efa5 | 1461 | xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts; |
ee1e5412 | 1462 | xecfg.ctxlen = o->context; |
6973dcae | 1463 | xecfg.flags = XDL_EMIT_FUNCNAMES; |
e0e324a4 JH |
1464 | if (funcname_pattern) |
1465 | xdiff_set_find_func(&xecfg, funcname_pattern); | |
6973dcae JH |
1466 | if (!diffopts) |
1467 | ; | |
cc44c765 | 1468 | else if (!prefixcmp(diffopts, "--unified=")) |
6973dcae | 1469 | xecfg.ctxlen = strtoul(diffopts + 10, NULL, 10); |
cc44c765 | 1470 | else if (!prefixcmp(diffopts, "-u")) |
6973dcae | 1471 | xecfg.ctxlen = strtoul(diffopts + 2, NULL, 10); |
cd112cef | 1472 | ecb.outf = xdiff_outf; |
6973dcae | 1473 | ecb.priv = &ecbdata; |
cd112cef | 1474 | ecbdata.xm.consume = fn_out_consume; |
c0c77734 | 1475 | if (DIFF_OPT_TST(o, COLOR_DIFF_WORDS)) { |
f59a59e2 JS |
1476 | ecbdata.diff_words = |
1477 | xcalloc(1, sizeof(struct diff_words_data)); | |
c0c77734 DB |
1478 | ecbdata.diff_words->file = o->file; |
1479 | } | |
c279d7e9 | 1480 | xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); |
8f67f8ae | 1481 | if (DIFF_OPT_TST(o, COLOR_DIFF_WORDS)) |
f59a59e2 | 1482 | free_diff_words_data(&ecbdata); |
6973dcae JH |
1483 | } |
1484 | ||
1485 | free_ab_and_return: | |
fc3abdf5 JH |
1486 | diff_free_filespec_data(one); |
1487 | diff_free_filespec_data(two); | |
6973dcae JH |
1488 | free(a_one); |
1489 | free(b_two); | |
1490 | return; | |
1491 | } | |
1492 | ||
1493 | static void builtin_diffstat(const char *name_a, const char *name_b, | |
1494 | struct diff_filespec *one, | |
1495 | struct diff_filespec *two, | |
710158e3 | 1496 | struct diffstat_t *diffstat, |
0d21efa5 | 1497 | struct diff_options *o, |
710158e3 | 1498 | int complete_rewrite) |
6973dcae JH |
1499 | { |
1500 | mmfile_t mf1, mf2; | |
1501 | struct diffstat_file *data; | |
1502 | ||
1503 | data = diffstat_add(diffstat, name_a, name_b); | |
1504 | ||
1505 | if (!one || !two) { | |
1506 | data->is_unmerged = 1; | |
1507 | return; | |
1508 | } | |
710158e3 JH |
1509 | if (complete_rewrite) { |
1510 | diff_populate_filespec(one, 0); | |
1511 | diff_populate_filespec(two, 0); | |
1512 | data->deleted = count_lines(one->data, one->size); | |
1513 | data->added = count_lines(two->data, two->size); | |
fc3abdf5 | 1514 | goto free_and_return; |
710158e3 | 1515 | } |
6973dcae JH |
1516 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) |
1517 | die("unable to read files to diff"); | |
1518 | ||
29a3eefd | 1519 | if (diff_filespec_is_binary(one) || diff_filespec_is_binary(two)) { |
6973dcae | 1520 | data->is_binary = 1; |
b1882587 AP |
1521 | data->added = mf2.size; |
1522 | data->deleted = mf1.size; | |
1523 | } else { | |
6973dcae JH |
1524 | /* Crazy xdl interfaces.. */ |
1525 | xpparam_t xpp; | |
1526 | xdemitconf_t xecfg; | |
1527 | xdemitcb_t ecb; | |
1528 | ||
30b25010 | 1529 | memset(&xecfg, 0, sizeof(xecfg)); |
0d21efa5 | 1530 | xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts; |
6973dcae JH |
1531 | ecb.outf = xdiff_outf; |
1532 | ecb.priv = diffstat; | |
c279d7e9 | 1533 | xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); |
6973dcae | 1534 | } |
fc3abdf5 JH |
1535 | |
1536 | free_and_return: | |
1537 | diff_free_filespec_data(one); | |
1538 | diff_free_filespec_data(two); | |
6973dcae JH |
1539 | } |
1540 | ||
88246898 | 1541 | static void builtin_checkdiff(const char *name_a, const char *name_b, |
cd676a51 | 1542 | const char *attr_path, |
88246898 | 1543 | struct diff_filespec *one, |
c5a8c3ec | 1544 | struct diff_filespec *two, struct diff_options *o) |
88246898 JS |
1545 | { |
1546 | mmfile_t mf1, mf2; | |
1547 | struct checkdiff_t data; | |
1548 | ||
1549 | if (!two) | |
1550 | return; | |
1551 | ||
1552 | memset(&data, 0, sizeof(data)); | |
1553 | data.xm.consume = checkdiff_consume; | |
1554 | data.filename = name_b ? name_b : name_a; | |
1555 | data.lineno = 0; | |
8f67f8ae | 1556 | data.color_diff = DIFF_OPT_TST(o, COLOR_DIFF); |
cd676a51 | 1557 | data.ws_rule = whitespace_rule(attr_path); |
c0c77734 | 1558 | data.file = o->file; |
88246898 JS |
1559 | |
1560 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
1561 | die("unable to read files to diff"); | |
1562 | ||
29a3eefd | 1563 | if (diff_filespec_is_binary(two)) |
fc3abdf5 | 1564 | goto free_and_return; |
88246898 JS |
1565 | else { |
1566 | /* Crazy xdl interfaces.. */ | |
1567 | xpparam_t xpp; | |
1568 | xdemitconf_t xecfg; | |
1569 | xdemitcb_t ecb; | |
1570 | ||
30b25010 | 1571 | memset(&xecfg, 0, sizeof(xecfg)); |
88246898 | 1572 | xpp.flags = XDF_NEED_MINIMAL; |
88246898 JS |
1573 | ecb.outf = xdiff_outf; |
1574 | ecb.priv = &data; | |
c279d7e9 | 1575 | xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); |
88246898 | 1576 | } |
fc3abdf5 JH |
1577 | free_and_return: |
1578 | diff_free_filespec_data(one); | |
1579 | diff_free_filespec_data(two); | |
62c64895 WC |
1580 | if (data.status) |
1581 | DIFF_OPT_SET(o, CHECK_FAILED); | |
88246898 JS |
1582 | } |
1583 | ||
6973dcae JH |
1584 | struct diff_filespec *alloc_filespec(const char *path) |
1585 | { | |
1586 | int namelen = strlen(path); | |
1587 | struct diff_filespec *spec = xmalloc(sizeof(*spec) + namelen + 1); | |
1588 | ||
1589 | memset(spec, 0, sizeof(*spec)); | |
1590 | spec->path = (char *)(spec + 1); | |
1591 | memcpy(spec->path, path, namelen+1); | |
9fb88419 | 1592 | spec->count = 1; |
6973dcae JH |
1593 | return spec; |
1594 | } | |
1595 | ||
9fb88419 LT |
1596 | void free_filespec(struct diff_filespec *spec) |
1597 | { | |
1598 | if (!--spec->count) { | |
1599 | diff_free_filespec_data(spec); | |
1600 | free(spec); | |
1601 | } | |
1602 | } | |
1603 | ||
6973dcae JH |
1604 | void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1, |
1605 | unsigned short mode) | |
1606 | { | |
1607 | if (mode) { | |
1608 | spec->mode = canon_mode(mode); | |
e702496e | 1609 | hashcpy(spec->sha1, sha1); |
0bef57ee | 1610 | spec->sha1_valid = !is_null_sha1(sha1); |
6973dcae JH |
1611 | } |
1612 | } | |
1613 | ||
1614 | /* | |
5adf317b | 1615 | * Given a name and sha1 pair, if the index tells us the file in |
6973dcae JH |
1616 | * the work tree has that object contents, return true, so that |
1617 | * prepare_temp_file() does not have to inflate and extract. | |
1618 | */ | |
1510fea7 | 1619 | static int reuse_worktree_file(const char *name, const unsigned char *sha1, int want_file) |
6973dcae JH |
1620 | { |
1621 | struct cache_entry *ce; | |
1622 | struct stat st; | |
1623 | int pos, len; | |
1624 | ||
1625 | /* We do not read the cache ourselves here, because the | |
1626 | * benchmark with my previous version that always reads cache | |
1627 | * shows that it makes things worse for diff-tree comparing | |
1628 | * two linux-2.6 kernel trees in an already checked out work | |
1629 | * tree. This is because most diff-tree comparisons deal with | |
1630 | * only a small number of files, while reading the cache is | |
1631 | * expensive for a large project, and its cost outweighs the | |
1632 | * savings we get by not inflating the object to a temporary | |
1633 | * file. Practically, this code only helps when we are used | |
1634 | * by diff-cache --cached, which does read the cache before | |
1635 | * calling us. | |
1636 | */ | |
1637 | if (!active_cache) | |
1638 | return 0; | |
1639 | ||
1510fea7 SP |
1640 | /* We want to avoid the working directory if our caller |
1641 | * doesn't need the data in a normal file, this system | |
1642 | * is rather slow with its stat/open/mmap/close syscalls, | |
1643 | * and the object is contained in a pack file. The pack | |
1644 | * is probably already open and will be faster to obtain | |
1645 | * the data through than the working directory. Loose | |
1646 | * objects however would tend to be slower as they need | |
1647 | * to be individually opened and inflated. | |
1648 | */ | |
5caf9232 | 1649 | if (!FAST_WORKING_DIRECTORY && !want_file && has_sha1_pack(sha1, NULL)) |
1510fea7 SP |
1650 | return 0; |
1651 | ||
6973dcae JH |
1652 | len = strlen(name); |
1653 | pos = cache_name_pos(name, len); | |
1654 | if (pos < 0) | |
1655 | return 0; | |
1656 | ce = active_cache[pos]; | |
eadb5831 JH |
1657 | |
1658 | /* | |
1659 | * This is not the sha1 we are looking for, or | |
1660 | * unreusable because it is not a regular file. | |
1661 | */ | |
1662 | if (hashcmp(sha1, ce->sha1) || !S_ISREG(ce->ce_mode)) | |
6973dcae | 1663 | return 0; |
eadb5831 JH |
1664 | |
1665 | /* | |
1666 | * If ce matches the file in the work tree, we can reuse it. | |
6973dcae | 1667 | */ |
eadb5831 JH |
1668 | if (ce_uptodate(ce) || |
1669 | (!lstat(name, &st) && !ce_match_stat(ce, &st, 0))) | |
1670 | return 1; | |
1671 | ||
1672 | return 0; | |
6973dcae JH |
1673 | } |
1674 | ||
3afaa72d JH |
1675 | static int populate_from_stdin(struct diff_filespec *s) |
1676 | { | |
af6eb822 | 1677 | struct strbuf buf; |
c32f749f | 1678 | size_t size = 0; |
af6eb822 | 1679 | |
f1696ee3 PH |
1680 | strbuf_init(&buf, 0); |
1681 | if (strbuf_read(&buf, 0, 0) < 0) | |
af6eb822 | 1682 | return error("error while reading from stdin %s", |
3afaa72d | 1683 | strerror(errno)); |
af6eb822 | 1684 | |
3afaa72d | 1685 | s->should_munmap = 0; |
c32f749f RS |
1686 | s->data = strbuf_detach(&buf, &size); |
1687 | s->size = size; | |
3afaa72d JH |
1688 | s->should_free = 1; |
1689 | return 0; | |
1690 | } | |
1691 | ||
04786756 LT |
1692 | static int diff_populate_gitlink(struct diff_filespec *s, int size_only) |
1693 | { | |
1694 | int len; | |
1695 | char *data = xmalloc(100); | |
1696 | len = snprintf(data, 100, | |
1697 | "Subproject commit %s\n", sha1_to_hex(s->sha1)); | |
1698 | s->data = data; | |
1699 | s->size = len; | |
1700 | s->should_free = 1; | |
1701 | if (size_only) { | |
1702 | s->data = NULL; | |
1703 | free(data); | |
1704 | } | |
1705 | return 0; | |
1706 | } | |
1707 | ||
6973dcae JH |
1708 | /* |
1709 | * While doing rename detection and pickaxe operation, we may need to | |
1710 | * grab the data for the blob (or file) for our own in-core comparison. | |
1711 | * diff_filespec has data and size fields for this purpose. | |
1712 | */ | |
1713 | int diff_populate_filespec(struct diff_filespec *s, int size_only) | |
1714 | { | |
1715 | int err = 0; | |
1716 | if (!DIFF_FILE_VALID(s)) | |
1717 | die("internal error: asking to populate invalid file."); | |
1718 | if (S_ISDIR(s->mode)) | |
1719 | return -1; | |
1720 | ||
6973dcae | 1721 | if (s->data) |
fc3abdf5 | 1722 | return 0; |
04786756 | 1723 | |
6e0b8ed6 JH |
1724 | if (size_only && 0 < s->size) |
1725 | return 0; | |
1726 | ||
302b9282 | 1727 | if (S_ISGITLINK(s->mode)) |
04786756 LT |
1728 | return diff_populate_gitlink(s, size_only); |
1729 | ||
6973dcae | 1730 | if (!s->sha1_valid || |
1510fea7 | 1731 | reuse_worktree_file(s->path, s->sha1, 0)) { |
5ecd293d | 1732 | struct strbuf buf; |
6973dcae JH |
1733 | struct stat st; |
1734 | int fd; | |
6c510bee | 1735 | |
3afaa72d JH |
1736 | if (!strcmp(s->path, "-")) |
1737 | return populate_from_stdin(s); | |
1738 | ||
6973dcae JH |
1739 | if (lstat(s->path, &st) < 0) { |
1740 | if (errno == ENOENT) { | |
1741 | err_empty: | |
1742 | err = -1; | |
1743 | empty: | |
d2543b8e | 1744 | s->data = (char *)""; |
6973dcae JH |
1745 | s->size = 0; |
1746 | return err; | |
1747 | } | |
1748 | } | |
dc49cd76 | 1749 | s->size = xsize_t(st.st_size); |
6973dcae JH |
1750 | if (!s->size) |
1751 | goto empty; | |
1752 | if (size_only) | |
1753 | return 0; | |
1754 | if (S_ISLNK(st.st_mode)) { | |
1755 | int ret; | |
1756 | s->data = xmalloc(s->size); | |
1757 | s->should_free = 1; | |
1758 | ret = readlink(s->path, s->data, s->size); | |
1759 | if (ret < 0) { | |
1760 | free(s->data); | |
1761 | goto err_empty; | |
1762 | } | |
1763 | return 0; | |
1764 | } | |
1765 | fd = open(s->path, O_RDONLY); | |
1766 | if (fd < 0) | |
1767 | goto err_empty; | |
c4712e45 | 1768 | s->data = xmmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0); |
6973dcae | 1769 | close(fd); |
6973dcae | 1770 | s->should_munmap = 1; |
6c510bee LT |
1771 | |
1772 | /* | |
1773 | * Convert from working tree format to canonical git format | |
1774 | */ | |
5ecd293d | 1775 | strbuf_init(&buf, 0); |
21e5ad50 | 1776 | if (convert_to_git(s->path, s->data, s->size, &buf, safe_crlf)) { |
c32f749f | 1777 | size_t size = 0; |
6c510bee LT |
1778 | munmap(s->data, s->size); |
1779 | s->should_munmap = 0; | |
c32f749f RS |
1780 | s->data = strbuf_detach(&buf, &size); |
1781 | s->size = size; | |
6c510bee LT |
1782 | s->should_free = 1; |
1783 | } | |
6973dcae JH |
1784 | } |
1785 | else { | |
21666f1a | 1786 | enum object_type type; |
6e0b8ed6 | 1787 | if (size_only) |
21666f1a | 1788 | type = sha1_object_info(s->sha1, &s->size); |
6973dcae | 1789 | else { |
21666f1a | 1790 | s->data = read_sha1_file(s->sha1, &type, &s->size); |
6973dcae JH |
1791 | s->should_free = 1; |
1792 | } | |
1793 | } | |
1794 | return 0; | |
1795 | } | |
1796 | ||
8ae92e63 | 1797 | void diff_free_filespec_blob(struct diff_filespec *s) |
6973dcae JH |
1798 | { |
1799 | if (s->should_free) | |
1800 | free(s->data); | |
1801 | else if (s->should_munmap) | |
1802 | munmap(s->data, s->size); | |
fc3abdf5 JH |
1803 | |
1804 | if (s->should_free || s->should_munmap) { | |
1805 | s->should_free = s->should_munmap = 0; | |
1806 | s->data = NULL; | |
1807 | } | |
eede7b7d JK |
1808 | } |
1809 | ||
1810 | void diff_free_filespec_data(struct diff_filespec *s) | |
1811 | { | |
8ae92e63 | 1812 | diff_free_filespec_blob(s); |
6973dcae JH |
1813 | free(s->cnt_data); |
1814 | s->cnt_data = NULL; | |
1815 | } | |
1816 | ||
1817 | static void prep_temp_blob(struct diff_tempfile *temp, | |
1818 | void *blob, | |
1819 | unsigned long size, | |
1820 | const unsigned char *sha1, | |
1821 | int mode) | |
1822 | { | |
1823 | int fd; | |
1824 | ||
1472966c | 1825 | fd = git_mkstemp(temp->tmp_path, PATH_MAX, ".diff_XXXXXX"); |
6973dcae | 1826 | if (fd < 0) |
e7a7be88 | 1827 | die("unable to create temp-file: %s", strerror(errno)); |
93822c22 | 1828 | if (write_in_full(fd, blob, size) != size) |
6973dcae JH |
1829 | die("unable to write temp-file"); |
1830 | close(fd); | |
1831 | temp->name = temp->tmp_path; | |
1832 | strcpy(temp->hex, sha1_to_hex(sha1)); | |
1833 | temp->hex[40] = 0; | |
1834 | sprintf(temp->mode, "%06o", mode); | |
1835 | } | |
1836 | ||
1837 | static void prepare_temp_file(const char *name, | |
1838 | struct diff_tempfile *temp, | |
1839 | struct diff_filespec *one) | |
1840 | { | |
1841 | if (!DIFF_FILE_VALID(one)) { | |
1842 | not_a_valid_file: | |
1843 | /* A '-' entry produces this for file-2, and | |
1844 | * a '+' entry produces this for file-1. | |
1845 | */ | |
1846 | temp->name = "/dev/null"; | |
1847 | strcpy(temp->hex, "."); | |
1848 | strcpy(temp->mode, "."); | |
1849 | return; | |
1850 | } | |
1851 | ||
1852 | if (!one->sha1_valid || | |
1510fea7 | 1853 | reuse_worktree_file(name, one->sha1, 1)) { |
6973dcae JH |
1854 | struct stat st; |
1855 | if (lstat(name, &st) < 0) { | |
1856 | if (errno == ENOENT) | |
1857 | goto not_a_valid_file; | |
1858 | die("stat(%s): %s", name, strerror(errno)); | |
1859 | } | |
1860 | if (S_ISLNK(st.st_mode)) { | |
1861 | int ret; | |
1862 | char buf[PATH_MAX + 1]; /* ought to be SYMLINK_MAX */ | |
dc49cd76 | 1863 | size_t sz = xsize_t(st.st_size); |
6973dcae JH |
1864 | if (sizeof(buf) <= st.st_size) |
1865 | die("symlink too long: %s", name); | |
dc49cd76 | 1866 | ret = readlink(name, buf, sz); |
6973dcae JH |
1867 | if (ret < 0) |
1868 | die("readlink(%s)", name); | |
dc49cd76 | 1869 | prep_temp_blob(temp, buf, sz, |
6973dcae JH |
1870 | (one->sha1_valid ? |
1871 | one->sha1 : null_sha1), | |
1872 | (one->sha1_valid ? | |
1873 | one->mode : S_IFLNK)); | |
1874 | } | |
1875 | else { | |
1876 | /* we can borrow from the file in the work tree */ | |
1877 | temp->name = name; | |
1878 | if (!one->sha1_valid) | |
1879 | strcpy(temp->hex, sha1_to_hex(null_sha1)); | |
1880 | else | |
1881 | strcpy(temp->hex, sha1_to_hex(one->sha1)); | |
1882 | /* Even though we may sometimes borrow the | |
1883 | * contents from the work tree, we always want | |
1884 | * one->mode. mode is trustworthy even when | |
1885 | * !(one->sha1_valid), as long as | |
1886 | * DIFF_FILE_VALID(one). | |
1887 | */ | |
1888 | sprintf(temp->mode, "%06o", one->mode); | |
1889 | } | |
1890 | return; | |
1891 | } | |
1892 | else { | |
1893 | if (diff_populate_filespec(one, 0)) | |
1894 | die("cannot read data blob for %s", one->path); | |
1895 | prep_temp_blob(temp, one->data, one->size, | |
1896 | one->sha1, one->mode); | |
1897 | } | |
1898 | } | |
1899 | ||
1900 | static void remove_tempfile(void) | |
1901 | { | |
1902 | int i; | |
1903 | ||
1904 | for (i = 0; i < 2; i++) | |
1905 | if (diff_temp[i].name == diff_temp[i].tmp_path) { | |
1906 | unlink(diff_temp[i].name); | |
1907 | diff_temp[i].name = NULL; | |
1908 | } | |
1909 | } | |
1910 | ||
1911 | static void remove_tempfile_on_signal(int signo) | |
1912 | { | |
1913 | remove_tempfile(); | |
1914 | signal(SIGINT, SIG_DFL); | |
1915 | raise(signo); | |
1916 | } | |
1917 | ||
6973dcae JH |
1918 | /* An external diff command takes: |
1919 | * | |
1920 | * diff-cmd name infile1 infile1-sha1 infile1-mode \ | |
1921 | * infile2 infile2-sha1 infile2-mode [ rename-to ] | |
1922 | * | |
1923 | */ | |
1924 | static void run_external_diff(const char *pgm, | |
1925 | const char *name, | |
1926 | const char *other, | |
1927 | struct diff_filespec *one, | |
1928 | struct diff_filespec *two, | |
1929 | const char *xfrm_msg, | |
1930 | int complete_rewrite) | |
1931 | { | |
1932 | const char *spawn_arg[10]; | |
1933 | struct diff_tempfile *temp = diff_temp; | |
1934 | int retval; | |
1935 | static int atexit_asked = 0; | |
1936 | const char *othername; | |
1937 | const char **arg = &spawn_arg[0]; | |
1938 | ||
1939 | othername = (other? other : name); | |
1940 | if (one && two) { | |
1941 | prepare_temp_file(name, &temp[0], one); | |
1942 | prepare_temp_file(othername, &temp[1], two); | |
1943 | if (! atexit_asked && | |
1944 | (temp[0].name == temp[0].tmp_path || | |
1945 | temp[1].name == temp[1].tmp_path)) { | |
1946 | atexit_asked = 1; | |
1947 | atexit(remove_tempfile); | |
1948 | } | |
1949 | signal(SIGINT, remove_tempfile_on_signal); | |
1950 | } | |
1951 | ||
1952 | if (one && two) { | |
1953 | *arg++ = pgm; | |
1954 | *arg++ = name; | |
1955 | *arg++ = temp[0].name; | |
1956 | *arg++ = temp[0].hex; | |
1957 | *arg++ = temp[0].mode; | |
1958 | *arg++ = temp[1].name; | |
1959 | *arg++ = temp[1].hex; | |
1960 | *arg++ = temp[1].mode; | |
1961 | if (other) { | |
1962 | *arg++ = other; | |
1963 | *arg++ = xfrm_msg; | |
1964 | } | |
1965 | } else { | |
1966 | *arg++ = pgm; | |
1967 | *arg++ = name; | |
1968 | } | |
1969 | *arg = NULL; | |
d5535ec7 JS |
1970 | fflush(NULL); |
1971 | retval = run_command_v_opt(spawn_arg, 0); | |
6973dcae JH |
1972 | remove_tempfile(); |
1973 | if (retval) { | |
1974 | fprintf(stderr, "external diff died, stopping at %s.\n", name); | |
1975 | exit(1); | |
1976 | } | |
1977 | } | |
1978 | ||
f1af60bd JH |
1979 | static const char *external_diff_attr(const char *name) |
1980 | { | |
1981 | struct git_attr_check attr_diff_check; | |
1982 | ||
cd676a51 JH |
1983 | if (!name) |
1984 | return NULL; | |
1985 | ||
f1af60bd JH |
1986 | setup_diff_attr_check(&attr_diff_check); |
1987 | if (!git_checkattr(name, 1, &attr_diff_check)) { | |
1988 | const char *value = attr_diff_check.value; | |
1989 | if (!ATTR_TRUE(value) && | |
1990 | !ATTR_FALSE(value) && | |
1991 | !ATTR_UNSET(value)) { | |
1992 | struct ll_diff_driver *drv; | |
1993 | ||
f1af60bd JH |
1994 | for (drv = user_diff; drv; drv = drv->next) |
1995 | if (!strcmp(drv->name, value)) | |
1996 | return drv->cmd; | |
1997 | } | |
1998 | } | |
1999 | return NULL; | |
2000 | } | |
2001 | ||
6973dcae JH |
2002 | static void run_diff_cmd(const char *pgm, |
2003 | const char *name, | |
2004 | const char *other, | |
cd676a51 | 2005 | const char *attr_path, |
6973dcae JH |
2006 | struct diff_filespec *one, |
2007 | struct diff_filespec *two, | |
2008 | const char *xfrm_msg, | |
051308f6 | 2009 | struct diff_options *o, |
6973dcae JH |
2010 | int complete_rewrite) |
2011 | { | |
8f67f8ae | 2012 | if (!DIFF_OPT_TST(o, ALLOW_EXTERNAL)) |
f1af60bd JH |
2013 | pgm = NULL; |
2014 | else { | |
cd676a51 | 2015 | const char *cmd = external_diff_attr(attr_path); |
f1af60bd JH |
2016 | if (cmd) |
2017 | pgm = cmd; | |
2018 | } | |
2019 | ||
6973dcae JH |
2020 | if (pgm) { |
2021 | run_external_diff(pgm, name, other, one, two, xfrm_msg, | |
2022 | complete_rewrite); | |
2023 | return; | |
2024 | } | |
2025 | if (one && two) | |
2026 | builtin_diff(name, other ? other : name, | |
051308f6 | 2027 | one, two, xfrm_msg, o, complete_rewrite); |
6973dcae | 2028 | else |
c0c77734 | 2029 | fprintf(o->file, "* Unmerged path %s\n", name); |
6973dcae JH |
2030 | } |
2031 | ||
2032 | static void diff_fill_sha1_info(struct diff_filespec *one) | |
2033 | { | |
2034 | if (DIFF_FILE_VALID(one)) { | |
2035 | if (!one->sha1_valid) { | |
2036 | struct stat st; | |
5332b2af JS |
2037 | if (!strcmp(one->path, "-")) { |
2038 | hashcpy(one->sha1, null_sha1); | |
2039 | return; | |
2040 | } | |
6973dcae JH |
2041 | if (lstat(one->path, &st) < 0) |
2042 | die("stat %s", one->path); | |
2043 | if (index_path(one->sha1, one->path, &st, 0)) | |
2044 | die("cannot hash %s\n", one->path); | |
2045 | } | |
2046 | } | |
2047 | else | |
e702496e | 2048 | hashclr(one->sha1); |
6973dcae JH |
2049 | } |
2050 | ||
125b7630 RS |
2051 | static int similarity_index(struct diff_filepair *p) |
2052 | { | |
2053 | return p->score * 100 / MAX_SCORE; | |
2054 | } | |
2055 | ||
cd676a51 JH |
2056 | static void strip_prefix(int prefix_length, const char **namep, const char **otherp) |
2057 | { | |
2058 | /* Strip the prefix but do not molest /dev/null and absolute paths */ | |
2059 | if (*namep && **namep != '/') | |
2060 | *namep += prefix_length; | |
2061 | if (*otherp && **otherp != '/') | |
2062 | *otherp += prefix_length; | |
2063 | } | |
2064 | ||
6973dcae JH |
2065 | static void run_diff(struct diff_filepair *p, struct diff_options *o) |
2066 | { | |
2067 | const char *pgm = external_diff(); | |
663af342 PH |
2068 | struct strbuf msg; |
2069 | char *xfrm_msg; | |
2070 | struct diff_filespec *one = p->one; | |
2071 | struct diff_filespec *two = p->two; | |
6973dcae JH |
2072 | const char *name; |
2073 | const char *other; | |
cd676a51 | 2074 | const char *attr_path; |
6973dcae | 2075 | int complete_rewrite = 0; |
663af342 | 2076 | |
cd676a51 JH |
2077 | name = p->one->path; |
2078 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
2079 | attr_path = name; | |
2080 | if (o->prefix_length) | |
2081 | strip_prefix(o->prefix_length, &name, &other); | |
6973dcae JH |
2082 | |
2083 | if (DIFF_PAIR_UNMERGED(p)) { | |
cd676a51 JH |
2084 | run_diff_cmd(pgm, name, NULL, attr_path, |
2085 | NULL, NULL, NULL, o, 0); | |
6973dcae JH |
2086 | return; |
2087 | } | |
2088 | ||
6973dcae JH |
2089 | diff_fill_sha1_info(one); |
2090 | diff_fill_sha1_info(two); | |
2091 | ||
663af342 | 2092 | strbuf_init(&msg, PATH_MAX * 2 + 300); |
6973dcae JH |
2093 | switch (p->status) { |
2094 | case DIFF_STATUS_COPIED: | |
663af342 PH |
2095 | strbuf_addf(&msg, "similarity index %d%%", similarity_index(p)); |
2096 | strbuf_addstr(&msg, "\ncopy from "); | |
2097 | quote_c_style(name, &msg, NULL, 0); | |
2098 | strbuf_addstr(&msg, "\ncopy to "); | |
2099 | quote_c_style(other, &msg, NULL, 0); | |
2100 | strbuf_addch(&msg, '\n'); | |
6973dcae JH |
2101 | break; |
2102 | case DIFF_STATUS_RENAMED: | |
663af342 PH |
2103 | strbuf_addf(&msg, "similarity index %d%%", similarity_index(p)); |
2104 | strbuf_addstr(&msg, "\nrename from "); | |
2105 | quote_c_style(name, &msg, NULL, 0); | |
2106 | strbuf_addstr(&msg, "\nrename to "); | |
2107 | quote_c_style(other, &msg, NULL, 0); | |
2108 | strbuf_addch(&msg, '\n'); | |
6973dcae JH |
2109 | break; |
2110 | case DIFF_STATUS_MODIFIED: | |
2111 | if (p->score) { | |
663af342 | 2112 | strbuf_addf(&msg, "dissimilarity index %d%%\n", |
125b7630 | 2113 | similarity_index(p)); |
6973dcae JH |
2114 | complete_rewrite = 1; |
2115 | break; | |
2116 | } | |
2117 | /* fallthru */ | |
2118 | default: | |
2119 | /* nothing */ | |
2120 | ; | |
2121 | } | |
2122 | ||
a89fccd2 | 2123 | if (hashcmp(one->sha1, two->sha1)) { |
8f67f8ae | 2124 | int abbrev = DIFF_OPT_TST(o, FULL_INDEX) ? 40 : DEFAULT_ABBREV; |
6973dcae | 2125 | |
8f67f8ae | 2126 | if (DIFF_OPT_TST(o, BINARY)) { |
82793c55 | 2127 | mmfile_t mf; |
29a3eefd JH |
2128 | if ((!fill_mmfile(&mf, one) && diff_filespec_is_binary(one)) || |
2129 | (!fill_mmfile(&mf, two) && diff_filespec_is_binary(two))) | |
82793c55 JH |
2130 | abbrev = 40; |
2131 | } | |
663af342 | 2132 | strbuf_addf(&msg, "index %.*s..%.*s", |
dcb3450f LT |
2133 | abbrev, sha1_to_hex(one->sha1), |
2134 | abbrev, sha1_to_hex(two->sha1)); | |
6973dcae | 2135 | if (one->mode == two->mode) |
663af342 PH |
2136 | strbuf_addf(&msg, " %06o", one->mode); |
2137 | strbuf_addch(&msg, '\n'); | |
6973dcae JH |
2138 | } |
2139 | ||
663af342 PH |
2140 | if (msg.len) |
2141 | strbuf_setlen(&msg, msg.len - 1); | |
2142 | xfrm_msg = msg.len ? msg.buf : NULL; | |
6973dcae JH |
2143 | |
2144 | if (!pgm && | |
2145 | DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) && | |
2146 | (S_IFMT & one->mode) != (S_IFMT & two->mode)) { | |
2147 | /* a filepair that changes between file and symlink | |
2148 | * needs to be split into deletion and creation. | |
2149 | */ | |
2150 | struct diff_filespec *null = alloc_filespec(two->path); | |
cd676a51 JH |
2151 | run_diff_cmd(NULL, name, other, attr_path, |
2152 | one, null, xfrm_msg, o, 0); | |
6973dcae JH |
2153 | free(null); |
2154 | null = alloc_filespec(one->path); | |
cd676a51 JH |
2155 | run_diff_cmd(NULL, name, other, attr_path, |
2156 | null, two, xfrm_msg, o, 0); | |
6973dcae JH |
2157 | free(null); |
2158 | } | |
2159 | else | |
cd676a51 JH |
2160 | run_diff_cmd(pgm, name, other, attr_path, |
2161 | one, two, xfrm_msg, o, complete_rewrite); | |
6973dcae | 2162 | |
663af342 | 2163 | strbuf_release(&msg); |
6973dcae JH |
2164 | } |
2165 | ||
2166 | static void run_diffstat(struct diff_filepair *p, struct diff_options *o, | |
2167 | struct diffstat_t *diffstat) | |
2168 | { | |
2169 | const char *name; | |
2170 | const char *other; | |
710158e3 | 2171 | int complete_rewrite = 0; |
6973dcae JH |
2172 | |
2173 | if (DIFF_PAIR_UNMERGED(p)) { | |
2174 | /* unmerged */ | |
0d21efa5 | 2175 | builtin_diffstat(p->one->path, NULL, NULL, NULL, diffstat, o, 0); |
6973dcae JH |
2176 | return; |
2177 | } | |
2178 | ||
2179 | name = p->one->path; | |
2180 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
2181 | ||
cd676a51 JH |
2182 | if (o->prefix_length) |
2183 | strip_prefix(o->prefix_length, &name, &other); | |
2184 | ||
6973dcae JH |
2185 | diff_fill_sha1_info(p->one); |
2186 | diff_fill_sha1_info(p->two); | |
2187 | ||
710158e3 JH |
2188 | if (p->status == DIFF_STATUS_MODIFIED && p->score) |
2189 | complete_rewrite = 1; | |
0d21efa5 | 2190 | builtin_diffstat(name, other, p->one, p->two, diffstat, o, complete_rewrite); |
6973dcae JH |
2191 | } |
2192 | ||
88246898 JS |
2193 | static void run_checkdiff(struct diff_filepair *p, struct diff_options *o) |
2194 | { | |
2195 | const char *name; | |
2196 | const char *other; | |
cd676a51 | 2197 | const char *attr_path; |
88246898 JS |
2198 | |
2199 | if (DIFF_PAIR_UNMERGED(p)) { | |
2200 | /* unmerged */ | |
2201 | return; | |
2202 | } | |
2203 | ||
2204 | name = p->one->path; | |
2205 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
cd676a51 JH |
2206 | attr_path = other ? other : name; |
2207 | ||
2208 | if (o->prefix_length) | |
2209 | strip_prefix(o->prefix_length, &name, &other); | |
88246898 JS |
2210 | |
2211 | diff_fill_sha1_info(p->one); | |
2212 | diff_fill_sha1_info(p->two); | |
2213 | ||
cd676a51 | 2214 | builtin_checkdiff(name, other, attr_path, p->one, p->two, o); |
88246898 JS |
2215 | } |
2216 | ||
6973dcae JH |
2217 | void diff_setup(struct diff_options *options) |
2218 | { | |
2219 | memset(options, 0, sizeof(*options)); | |
c0c77734 DB |
2220 | |
2221 | options->file = stdout; | |
2222 | ||
6973dcae JH |
2223 | options->line_termination = '\n'; |
2224 | options->break_opt = -1; | |
2225 | options->rename_limit = -1; | |
7df7c019 | 2226 | options->dirstat_percent = 3; |
ee1e5412 | 2227 | options->context = 3; |
6973dcae JH |
2228 | |
2229 | options->change = diff_change; | |
2230 | options->add_remove = diff_addremove; | |
6b2f2d98 | 2231 | if (diff_use_color_default > 0) |
8f67f8ae PH |
2232 | DIFF_OPT_SET(options, COLOR_DIFF); |
2233 | else | |
2234 | DIFF_OPT_CLR(options, COLOR_DIFF); | |
b68ea12e | 2235 | options->detect_rename = diff_detect_rename_default; |
eab9a40b JS |
2236 | |
2237 | options->a_prefix = "a/"; | |
2238 | options->b_prefix = "b/"; | |
6973dcae JH |
2239 | } |
2240 | ||
2241 | int diff_setup_done(struct diff_options *options) | |
2242 | { | |
d7de00f7 TH |
2243 | int count = 0; |
2244 | ||
2245 | if (options->output_format & DIFF_FORMAT_NAME) | |
2246 | count++; | |
2247 | if (options->output_format & DIFF_FORMAT_NAME_STATUS) | |
2248 | count++; | |
2249 | if (options->output_format & DIFF_FORMAT_CHECKDIFF) | |
2250 | count++; | |
2251 | if (options->output_format & DIFF_FORMAT_NO_OUTPUT) | |
2252 | count++; | |
2253 | if (count > 1) | |
2254 | die("--name-only, --name-status, --check and -s are mutually exclusive"); | |
2255 | ||
8f67f8ae | 2256 | if (DIFF_OPT_TST(options, FIND_COPIES_HARDER)) |
03b9d560 JH |
2257 | options->detect_rename = DIFF_DETECT_COPY; |
2258 | ||
cd676a51 JH |
2259 | if (!DIFF_OPT_TST(options, RELATIVE_NAME)) |
2260 | options->prefix = NULL; | |
2261 | if (options->prefix) | |
2262 | options->prefix_length = strlen(options->prefix); | |
2263 | else | |
2264 | options->prefix_length = 0; | |
2265 | ||
c6744349 TH |
2266 | if (options->output_format & (DIFF_FORMAT_NAME | |
2267 | DIFF_FORMAT_NAME_STATUS | | |
2268 | DIFF_FORMAT_CHECKDIFF | | |
2269 | DIFF_FORMAT_NO_OUTPUT)) | |
2270 | options->output_format &= ~(DIFF_FORMAT_RAW | | |
74e2abe5 | 2271 | DIFF_FORMAT_NUMSTAT | |
c6744349 | 2272 | DIFF_FORMAT_DIFFSTAT | |
ebd124c6 | 2273 | DIFF_FORMAT_SHORTSTAT | |
7df7c019 | 2274 | DIFF_FORMAT_DIRSTAT | |
c6744349 TH |
2275 | DIFF_FORMAT_SUMMARY | |
2276 | DIFF_FORMAT_PATCH); | |
2277 | ||
6973dcae JH |
2278 | /* |
2279 | * These cases always need recursive; we do not drop caller-supplied | |
2280 | * recursive bits for other formats here. | |
2281 | */ | |
c6744349 | 2282 | if (options->output_format & (DIFF_FORMAT_PATCH | |
74e2abe5 | 2283 | DIFF_FORMAT_NUMSTAT | |
c6744349 | 2284 | DIFF_FORMAT_DIFFSTAT | |
ebd124c6 | 2285 | DIFF_FORMAT_SHORTSTAT | |
7df7c019 | 2286 | DIFF_FORMAT_DIRSTAT | |
d7014dc0 | 2287 | DIFF_FORMAT_SUMMARY | |
c6744349 | 2288 | DIFF_FORMAT_CHECKDIFF)) |
8f67f8ae | 2289 | DIFF_OPT_SET(options, RECURSIVE); |
5e363541 | 2290 | /* |
3969cf7d | 2291 | * Also pickaxe would not work very well if you do not say recursive |
5e363541 | 2292 | */ |
3969cf7d | 2293 | if (options->pickaxe) |
8f67f8ae | 2294 | DIFF_OPT_SET(options, RECURSIVE); |
5e363541 | 2295 | |
6973dcae JH |
2296 | if (options->detect_rename && options->rename_limit < 0) |
2297 | options->rename_limit = diff_rename_limit_default; | |
2298 | if (options->setup & DIFF_SETUP_USE_CACHE) { | |
2299 | if (!active_cache) | |
2300 | /* read-cache does not die even when it fails | |
2301 | * so it is safe for us to do this here. Also | |
2302 | * it does not smudge active_cache or active_nr | |
2303 | * when it fails, so we do not have to worry about | |
2304 | * cleaning it up ourselves either. | |
2305 | */ | |
2306 | read_cache(); | |
2307 | } | |
6973dcae JH |
2308 | if (options->abbrev <= 0 || 40 < options->abbrev) |
2309 | options->abbrev = 40; /* full */ | |
2310 | ||
68aacb2f JH |
2311 | /* |
2312 | * It does not make sense to show the first hit we happened | |
2313 | * to have found. It does not make sense not to return with | |
2314 | * exit code in such a case either. | |
2315 | */ | |
8f67f8ae | 2316 | if (DIFF_OPT_TST(options, QUIET)) { |
68aacb2f | 2317 | options->output_format = DIFF_FORMAT_NO_OUTPUT; |
8f67f8ae | 2318 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); |
68aacb2f JH |
2319 | } |
2320 | ||
2321 | /* | |
2322 | * If we postprocess in diffcore, we cannot simply return | |
2323 | * upon the first hit. We need to run diff as usual. | |
2324 | */ | |
2325 | if (options->pickaxe || options->filter) | |
8f67f8ae | 2326 | DIFF_OPT_CLR(options, QUIET); |
68aacb2f | 2327 | |
6973dcae JH |
2328 | return 0; |
2329 | } | |
2330 | ||
d2543b8e | 2331 | static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val) |
ee1e5412 LT |
2332 | { |
2333 | char c, *eq; | |
2334 | int len; | |
2335 | ||
2336 | if (*arg != '-') | |
2337 | return 0; | |
2338 | c = *++arg; | |
2339 | if (!c) | |
2340 | return 0; | |
2341 | if (c == arg_short) { | |
2342 | c = *++arg; | |
2343 | if (!c) | |
2344 | return 1; | |
2345 | if (val && isdigit(c)) { | |
2346 | char *end; | |
2347 | int n = strtoul(arg, &end, 10); | |
2348 | if (*end) | |
2349 | return 0; | |
2350 | *val = n; | |
2351 | return 1; | |
2352 | } | |
2353 | return 0; | |
2354 | } | |
2355 | if (c != '-') | |
2356 | return 0; | |
2357 | arg++; | |
2358 | eq = strchr(arg, '='); | |
2359 | if (eq) | |
2360 | len = eq - arg; | |
2361 | else | |
2362 | len = strlen(arg); | |
2363 | if (!len || strncmp(arg, arg_long, len)) | |
2364 | return 0; | |
2365 | if (eq) { | |
2366 | int n; | |
2367 | char *end; | |
2368 | if (!isdigit(*++eq)) | |
2369 | return 0; | |
2370 | n = strtoul(eq, &end, 10); | |
2371 | if (*end) | |
2372 | return 0; | |
2373 | *val = n; | |
2374 | } | |
2375 | return 1; | |
2376 | } | |
2377 | ||
16befb8b JH |
2378 | static int diff_scoreopt_parse(const char *opt); |
2379 | ||
6973dcae JH |
2380 | int diff_opt_parse(struct diff_options *options, const char **av, int ac) |
2381 | { | |
2382 | const char *arg = av[0]; | |
d054680c PH |
2383 | |
2384 | /* Output format options */ | |
6973dcae | 2385 | if (!strcmp(arg, "-p") || !strcmp(arg, "-u")) |
c6744349 | 2386 | options->output_format |= DIFF_FORMAT_PATCH; |
ee1e5412 | 2387 | else if (opt_arg(arg, 'U', "unified", &options->context)) |
c6744349 | 2388 | options->output_format |= DIFF_FORMAT_PATCH; |
a610786f TH |
2389 | else if (!strcmp(arg, "--raw")) |
2390 | options->output_format |= DIFF_FORMAT_RAW; | |
8f67f8ae | 2391 | else if (!strcmp(arg, "--patch-with-raw")) |
c6744349 | 2392 | options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_RAW; |
8f67f8ae | 2393 | else if (!strcmp(arg, "--numstat")) |
74e2abe5 | 2394 | options->output_format |= DIFF_FORMAT_NUMSTAT; |
8f67f8ae | 2395 | else if (!strcmp(arg, "--shortstat")) |
ebd124c6 | 2396 | options->output_format |= DIFF_FORMAT_SHORTSTAT; |
7df7c019 LT |
2397 | else if (opt_arg(arg, 'X', "dirstat", &options->dirstat_percent)) |
2398 | options->output_format |= DIFF_FORMAT_DIRSTAT; | |
2399 | else if (!strcmp(arg, "--cumulative")) | |
2400 | options->output_format |= DIFF_FORMAT_CUMULATIVE; | |
d054680c PH |
2401 | else if (!strcmp(arg, "--check")) |
2402 | options->output_format |= DIFF_FORMAT_CHECKDIFF; | |
2403 | else if (!strcmp(arg, "--summary")) | |
2404 | options->output_format |= DIFF_FORMAT_SUMMARY; | |
2405 | else if (!strcmp(arg, "--patch-with-stat")) | |
2406 | options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_DIFFSTAT; | |
2407 | else if (!strcmp(arg, "--name-only")) | |
2408 | options->output_format |= DIFF_FORMAT_NAME; | |
2409 | else if (!strcmp(arg, "--name-status")) | |
2410 | options->output_format |= DIFF_FORMAT_NAME_STATUS; | |
2411 | else if (!strcmp(arg, "-s")) | |
2412 | options->output_format |= DIFF_FORMAT_NO_OUTPUT; | |
cc44c765 | 2413 | else if (!prefixcmp(arg, "--stat")) { |
5c5b2ea9 LT |
2414 | char *end; |
2415 | int width = options->stat_width; | |
2416 | int name_width = options->stat_name_width; | |
2417 | arg += 6; | |
2418 | end = (char *)arg; | |
2419 | ||
2420 | switch (*arg) { | |
2421 | case '-': | |
cc44c765 | 2422 | if (!prefixcmp(arg, "-width=")) |
5c5b2ea9 | 2423 | width = strtoul(arg + 7, &end, 10); |
cc44c765 | 2424 | else if (!prefixcmp(arg, "-name-width=")) |
5c5b2ea9 LT |
2425 | name_width = strtoul(arg + 12, &end, 10); |
2426 | break; | |
2427 | case '=': | |
2428 | width = strtoul(arg+1, &end, 10); | |
2429 | if (*end == ',') | |
2430 | name_width = strtoul(end+1, &end, 10); | |
2431 | } | |
2432 | ||
2433 | /* Important! This checks all the error cases! */ | |
2434 | if (*end) | |
2435 | return 0; | |
c6744349 | 2436 | options->output_format |= DIFF_FORMAT_DIFFSTAT; |
5c5b2ea9 LT |
2437 | options->stat_name_width = name_width; |
2438 | options->stat_width = width; | |
a2540023 | 2439 | } |
d054680c PH |
2440 | |
2441 | /* renames options */ | |
cc44c765 | 2442 | else if (!prefixcmp(arg, "-B")) { |
8f67f8ae | 2443 | if ((options->break_opt = diff_scoreopt_parse(arg)) == -1) |
6973dcae JH |
2444 | return -1; |
2445 | } | |
cc44c765 | 2446 | else if (!prefixcmp(arg, "-M")) { |
8f67f8ae | 2447 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) |
6973dcae JH |
2448 | return -1; |
2449 | options->detect_rename = DIFF_DETECT_RENAME; | |
2450 | } | |
cc44c765 | 2451 | else if (!prefixcmp(arg, "-C")) { |
ca6c0970 | 2452 | if (options->detect_rename == DIFF_DETECT_COPY) |
8f67f8ae PH |
2453 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); |
2454 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) | |
6973dcae JH |
2455 | return -1; |
2456 | options->detect_rename = DIFF_DETECT_COPY; | |
2457 | } | |
d054680c PH |
2458 | else if (!strcmp(arg, "--no-renames")) |
2459 | options->detect_rename = 0; | |
cd676a51 JH |
2460 | else if (!strcmp(arg, "--relative")) |
2461 | DIFF_OPT_SET(options, RELATIVE_NAME); | |
c0cb4a06 JH |
2462 | else if (!prefixcmp(arg, "--relative=")) { |
2463 | DIFF_OPT_SET(options, RELATIVE_NAME); | |
2464 | options->prefix = arg + 11; | |
2465 | } | |
d054680c PH |
2466 | |
2467 | /* xdiff options */ | |
2468 | else if (!strcmp(arg, "-w") || !strcmp(arg, "--ignore-all-space")) | |
2469 | options->xdl_opts |= XDF_IGNORE_WHITESPACE; | |
2470 | else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change")) | |
2471 | options->xdl_opts |= XDF_IGNORE_WHITESPACE_CHANGE; | |
2472 | else if (!strcmp(arg, "--ignore-space-at-eol")) | |
2473 | options->xdl_opts |= XDF_IGNORE_WHITESPACE_AT_EOL; | |
2474 | ||
2475 | /* flags options */ | |
2476 | else if (!strcmp(arg, "--binary")) { | |
2477 | options->output_format |= DIFF_FORMAT_PATCH; | |
2478 | DIFF_OPT_SET(options, BINARY); | |
2479 | } | |
2480 | else if (!strcmp(arg, "--full-index")) | |
2481 | DIFF_OPT_SET(options, FULL_INDEX); | |
2482 | else if (!strcmp(arg, "-a") || !strcmp(arg, "--text")) | |
2483 | DIFF_OPT_SET(options, TEXT); | |
2484 | else if (!strcmp(arg, "-R")) | |
2485 | DIFF_OPT_SET(options, REVERSE_DIFF); | |
6973dcae | 2486 | else if (!strcmp(arg, "--find-copies-harder")) |
8f67f8ae | 2487 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); |
750f7b66 | 2488 | else if (!strcmp(arg, "--follow")) |
8f67f8ae | 2489 | DIFF_OPT_SET(options, FOLLOW_RENAMES); |
cd112cef | 2490 | else if (!strcmp(arg, "--color")) |
8f67f8ae | 2491 | DIFF_OPT_SET(options, COLOR_DIFF); |
fef88bb0 | 2492 | else if (!strcmp(arg, "--no-color")) |
8f67f8ae | 2493 | DIFF_OPT_CLR(options, COLOR_DIFF); |
f59a59e2 | 2494 | else if (!strcmp(arg, "--color-words")) |
8f67f8ae | 2495 | options->flags |= DIFF_OPT_COLOR_DIFF | DIFF_OPT_COLOR_DIFF_WORDS; |
41bbf9d5 | 2496 | else if (!strcmp(arg, "--exit-code")) |
8f67f8ae | 2497 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); |
68aacb2f | 2498 | else if (!strcmp(arg, "--quiet")) |
8f67f8ae | 2499 | DIFF_OPT_SET(options, QUIET); |
72909bef | 2500 | else if (!strcmp(arg, "--ext-diff")) |
8f67f8ae | 2501 | DIFF_OPT_SET(options, ALLOW_EXTERNAL); |
72909bef | 2502 | else if (!strcmp(arg, "--no-ext-diff")) |
8f67f8ae | 2503 | DIFF_OPT_CLR(options, ALLOW_EXTERNAL); |
50fd9bd8 JS |
2504 | else if (!strcmp(arg, "--ignore-submodules")) |
2505 | DIFF_OPT_SET(options, IGNORE_SUBMODULES); | |
d054680c PH |
2506 | |
2507 | /* misc options */ | |
2508 | else if (!strcmp(arg, "-z")) | |
2509 | options->line_termination = 0; | |
2510 | else if (!prefixcmp(arg, "-l")) | |
2511 | options->rename_limit = strtoul(arg+2, NULL, 10); | |
2512 | else if (!prefixcmp(arg, "-S")) | |
2513 | options->pickaxe = arg + 2; | |
2514 | else if (!strcmp(arg, "--pickaxe-all")) | |
2515 | options->pickaxe_opts = DIFF_PICKAXE_ALL; | |
2516 | else if (!strcmp(arg, "--pickaxe-regex")) | |
2517 | options->pickaxe_opts = DIFF_PICKAXE_REGEX; | |
2518 | else if (!prefixcmp(arg, "-O")) | |
2519 | options->orderfile = arg + 2; | |
2520 | else if (!prefixcmp(arg, "--diff-filter=")) | |
2521 | options->filter = arg + 14; | |
2522 | else if (!strcmp(arg, "--abbrev")) | |
2523 | options->abbrev = DEFAULT_ABBREV; | |
2524 | else if (!prefixcmp(arg, "--abbrev=")) { | |
2525 | options->abbrev = strtoul(arg + 9, NULL, 10); | |
2526 | if (options->abbrev < MINIMUM_ABBREV) | |
2527 | options->abbrev = MINIMUM_ABBREV; | |
2528 | else if (40 < options->abbrev) | |
2529 | options->abbrev = 40; | |
2530 | } | |
eab9a40b JS |
2531 | else if (!prefixcmp(arg, "--src-prefix=")) |
2532 | options->a_prefix = arg + 13; | |
2533 | else if (!prefixcmp(arg, "--dst-prefix=")) | |
2534 | options->b_prefix = arg + 13; | |
2535 | else if (!strcmp(arg, "--no-prefix")) | |
2536 | options->a_prefix = options->b_prefix = ""; | |
c0c77734 DB |
2537 | else if (!prefixcmp(arg, "--output=")) { |
2538 | options->file = fopen(arg + strlen("--output="), "w"); | |
2539 | options->close_file = 1; | |
2540 | } else | |
6973dcae JH |
2541 | return 0; |
2542 | return 1; | |
2543 | } | |
2544 | ||
2545 | static int parse_num(const char **cp_p) | |
2546 | { | |
2547 | unsigned long num, scale; | |
2548 | int ch, dot; | |
2549 | const char *cp = *cp_p; | |
2550 | ||
2551 | num = 0; | |
2552 | scale = 1; | |
2553 | dot = 0; | |
2554 | for(;;) { | |
2555 | ch = *cp; | |
2556 | if ( !dot && ch == '.' ) { | |
2557 | scale = 1; | |
2558 | dot = 1; | |
2559 | } else if ( ch == '%' ) { | |
2560 | scale = dot ? scale*100 : 100; | |
2561 | cp++; /* % is always at the end */ | |
2562 | break; | |
2563 | } else if ( ch >= '0' && ch <= '9' ) { | |
2564 | if ( scale < 100000 ) { | |
2565 | scale *= 10; | |
2566 | num = (num*10) + (ch-'0'); | |
2567 | } | |
2568 | } else { | |
2569 | break; | |
2570 | } | |
2571 | cp++; | |
2572 | } | |
2573 | *cp_p = cp; | |
2574 | ||
2575 | /* user says num divided by scale and we say internally that | |
2576 | * is MAX_SCORE * num / scale. | |
2577 | */ | |
dc49cd76 | 2578 | return (int)((num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale)); |
6973dcae JH |
2579 | } |
2580 | ||
16befb8b | 2581 | static int diff_scoreopt_parse(const char *opt) |
6973dcae JH |
2582 | { |
2583 | int opt1, opt2, cmd; | |
2584 | ||
2585 | if (*opt++ != '-') | |
2586 | return -1; | |
2587 | cmd = *opt++; | |
2588 | if (cmd != 'M' && cmd != 'C' && cmd != 'B') | |
2589 | return -1; /* that is not a -M, -C nor -B option */ | |
2590 | ||
2591 | opt1 = parse_num(&opt); | |
2592 | if (cmd != 'B') | |
2593 | opt2 = 0; | |
2594 | else { | |
2595 | if (*opt == 0) | |
2596 | opt2 = 0; | |
2597 | else if (*opt != '/') | |
2598 | return -1; /* we expect -B80/99 or -B80 */ | |
2599 | else { | |
2600 | opt++; | |
2601 | opt2 = parse_num(&opt); | |
2602 | } | |
2603 | } | |
2604 | if (*opt != 0) | |
2605 | return -1; | |
2606 | return opt1 | (opt2 << 16); | |
2607 | } | |
2608 | ||
2609 | struct diff_queue_struct diff_queued_diff; | |
2610 | ||
2611 | void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp) | |
2612 | { | |
2613 | if (queue->alloc <= queue->nr) { | |
2614 | queue->alloc = alloc_nr(queue->alloc); | |
2615 | queue->queue = xrealloc(queue->queue, | |
2616 | sizeof(dp) * queue->alloc); | |
2617 | } | |
2618 | queue->queue[queue->nr++] = dp; | |
2619 | } | |
2620 | ||
2621 | struct diff_filepair *diff_queue(struct diff_queue_struct *queue, | |
2622 | struct diff_filespec *one, | |
2623 | struct diff_filespec *two) | |
2624 | { | |
ef677686 | 2625 | struct diff_filepair *dp = xcalloc(1, sizeof(*dp)); |
6973dcae JH |
2626 | dp->one = one; |
2627 | dp->two = two; | |
6973dcae JH |
2628 | if (queue) |
2629 | diff_q(queue, dp); | |
2630 | return dp; | |
2631 | } | |
2632 | ||
2633 | void diff_free_filepair(struct diff_filepair *p) | |
2634 | { | |
9fb88419 LT |
2635 | free_filespec(p->one); |
2636 | free_filespec(p->two); | |
6973dcae JH |
2637 | free(p); |
2638 | } | |
2639 | ||
2640 | /* This is different from find_unique_abbrev() in that | |
2641 | * it stuffs the result with dots for alignment. | |
2642 | */ | |
2643 | const char *diff_unique_abbrev(const unsigned char *sha1, int len) | |
2644 | { | |
2645 | int abblen; | |
2646 | const char *abbrev; | |
2647 | if (len == 40) | |
2648 | return sha1_to_hex(sha1); | |
2649 | ||
2650 | abbrev = find_unique_abbrev(sha1, len); | |
6973dcae JH |
2651 | abblen = strlen(abbrev); |
2652 | if (abblen < 37) { | |
2653 | static char hex[41]; | |
2654 | if (len < abblen && abblen <= len + 2) | |
2655 | sprintf(hex, "%s%.*s", abbrev, len+3-abblen, ".."); | |
2656 | else | |
2657 | sprintf(hex, "%s...", abbrev); | |
2658 | return hex; | |
2659 | } | |
2660 | return sha1_to_hex(sha1); | |
2661 | } | |
2662 | ||
663af342 | 2663 | static void diff_flush_raw(struct diff_filepair *p, struct diff_options *opt) |
6973dcae | 2664 | { |
663af342 PH |
2665 | int line_termination = opt->line_termination; |
2666 | int inter_name_termination = line_termination ? '\t' : '\0'; | |
6973dcae | 2667 | |
663af342 | 2668 | if (!(opt->output_format & DIFF_FORMAT_NAME_STATUS)) { |
c0c77734 DB |
2669 | fprintf(opt->file, ":%06o %06o %s ", p->one->mode, p->two->mode, |
2670 | diff_unique_abbrev(p->one->sha1, opt->abbrev)); | |
2671 | fprintf(opt->file, "%s ", diff_unique_abbrev(p->two->sha1, opt->abbrev)); | |
6973dcae | 2672 | } |
663af342 | 2673 | if (p->score) { |
c0c77734 DB |
2674 | fprintf(opt->file, "%c%03d%c", p->status, similarity_index(p), |
2675 | inter_name_termination); | |
663af342 | 2676 | } else { |
c0c77734 | 2677 | fprintf(opt->file, "%c%c", p->status, inter_name_termination); |
6973dcae | 2678 | } |
6973dcae | 2679 | |
cd676a51 JH |
2680 | if (p->status == DIFF_STATUS_COPIED || |
2681 | p->status == DIFF_STATUS_RENAMED) { | |
2682 | const char *name_a, *name_b; | |
2683 | name_a = p->one->path; | |
2684 | name_b = p->two->path; | |
2685 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 DB |
2686 | write_name_quoted(name_a, opt->file, inter_name_termination); |
2687 | write_name_quoted(name_b, opt->file, line_termination); | |
663af342 | 2688 | } else { |
cd676a51 JH |
2689 | const char *name_a, *name_b; |
2690 | name_a = p->one->mode ? p->one->path : p->two->path; | |
2691 | name_b = NULL; | |
2692 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 | 2693 | write_name_quoted(name_a, opt->file, line_termination); |
663af342 | 2694 | } |
6973dcae JH |
2695 | } |
2696 | ||
2697 | int diff_unmodified_pair(struct diff_filepair *p) | |
2698 | { | |
2699 | /* This function is written stricter than necessary to support | |
2700 | * the currently implemented transformers, but the idea is to | |
2701 | * let transformers to produce diff_filepairs any way they want, | |
2702 | * and filter and clean them up here before producing the output. | |
2703 | */ | |
663af342 | 2704 | struct diff_filespec *one = p->one, *two = p->two; |
6973dcae JH |
2705 | |
2706 | if (DIFF_PAIR_UNMERGED(p)) | |
2707 | return 0; /* unmerged is interesting */ | |
2708 | ||
6973dcae JH |
2709 | /* deletion, addition, mode or type change |
2710 | * and rename are all interesting. | |
2711 | */ | |
2712 | if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) || | |
2713 | DIFF_PAIR_MODE_CHANGED(p) || | |
2714 | strcmp(one->path, two->path)) | |
2715 | return 0; | |
2716 | ||
2717 | /* both are valid and point at the same path. that is, we are | |
2718 | * dealing with a change. | |
2719 | */ | |
2720 | if (one->sha1_valid && two->sha1_valid && | |
a89fccd2 | 2721 | !hashcmp(one->sha1, two->sha1)) |
6973dcae JH |
2722 | return 1; /* no change */ |
2723 | if (!one->sha1_valid && !two->sha1_valid) | |
2724 | return 1; /* both look at the same file on the filesystem. */ | |
2725 | return 0; | |
2726 | } | |
2727 | ||
2728 | static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o) | |
2729 | { | |
2730 | if (diff_unmodified_pair(p)) | |
2731 | return; | |
2732 | ||
2733 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
2734 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
2735 | return; /* no tree diffs in patch format */ | |
2736 | ||
2737 | run_diff(p, o); | |
2738 | } | |
2739 | ||
2740 | static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o, | |
2741 | struct diffstat_t *diffstat) | |
2742 | { | |
2743 | if (diff_unmodified_pair(p)) | |
2744 | return; | |
2745 | ||
2746 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
2747 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
2748 | return; /* no tree diffs in patch format */ | |
2749 | ||
2750 | run_diffstat(p, o, diffstat); | |
2751 | } | |
2752 | ||
88246898 JS |
2753 | static void diff_flush_checkdiff(struct diff_filepair *p, |
2754 | struct diff_options *o) | |
2755 | { | |
2756 | if (diff_unmodified_pair(p)) | |
2757 | return; | |
2758 | ||
2759 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
2760 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
2761 | return; /* no tree diffs in patch format */ | |
2762 | ||
2763 | run_checkdiff(p, o); | |
2764 | } | |
2765 | ||
6973dcae JH |
2766 | int diff_queue_is_empty(void) |
2767 | { | |
2768 | struct diff_queue_struct *q = &diff_queued_diff; | |
2769 | int i; | |
2770 | for (i = 0; i < q->nr; i++) | |
2771 | if (!diff_unmodified_pair(q->queue[i])) | |
2772 | return 0; | |
2773 | return 1; | |
2774 | } | |
2775 | ||
2776 | #if DIFF_DEBUG | |
2777 | void diff_debug_filespec(struct diff_filespec *s, int x, const char *one) | |
2778 | { | |
2779 | fprintf(stderr, "queue[%d] %s (%s) %s %06o %s\n", | |
2780 | x, one ? one : "", | |
2781 | s->path, | |
2782 | DIFF_FILE_VALID(s) ? "valid" : "invalid", | |
2783 | s->mode, | |
2784 | s->sha1_valid ? sha1_to_hex(s->sha1) : ""); | |
2785 | fprintf(stderr, "queue[%d] %s size %lu flags %d\n", | |
2786 | x, one ? one : "", | |
2787 | s->size, s->xfrm_flags); | |
2788 | } | |
2789 | ||
2790 | void diff_debug_filepair(const struct diff_filepair *p, int i) | |
2791 | { | |
2792 | diff_debug_filespec(p->one, i, "one"); | |
2793 | diff_debug_filespec(p->two, i, "two"); | |
64479711 | 2794 | fprintf(stderr, "score %d, status %c rename_used %d broken %d\n", |
6973dcae | 2795 | p->score, p->status ? p->status : '?', |
64479711 | 2796 | p->one->rename_used, p->broken_pair); |
6973dcae JH |
2797 | } |
2798 | ||
2799 | void diff_debug_queue(const char *msg, struct diff_queue_struct *q) | |
2800 | { | |
2801 | int i; | |
2802 | if (msg) | |
2803 | fprintf(stderr, "%s\n", msg); | |
2804 | fprintf(stderr, "q->nr = %d\n", q->nr); | |
2805 | for (i = 0; i < q->nr; i++) { | |
2806 | struct diff_filepair *p = q->queue[i]; | |
2807 | diff_debug_filepair(p, i); | |
2808 | } | |
2809 | } | |
2810 | #endif | |
2811 | ||
2812 | static void diff_resolve_rename_copy(void) | |
2813 | { | |
64479711 LT |
2814 | int i; |
2815 | struct diff_filepair *p; | |
6973dcae JH |
2816 | struct diff_queue_struct *q = &diff_queued_diff; |
2817 | ||
2818 | diff_debug_queue("resolve-rename-copy", q); | |
2819 | ||
2820 | for (i = 0; i < q->nr; i++) { | |
2821 | p = q->queue[i]; | |
2822 | p->status = 0; /* undecided */ | |
2823 | if (DIFF_PAIR_UNMERGED(p)) | |
2824 | p->status = DIFF_STATUS_UNMERGED; | |
2825 | else if (!DIFF_FILE_VALID(p->one)) | |
2826 | p->status = DIFF_STATUS_ADDED; | |
2827 | else if (!DIFF_FILE_VALID(p->two)) | |
2828 | p->status = DIFF_STATUS_DELETED; | |
2829 | else if (DIFF_PAIR_TYPE_CHANGED(p)) | |
2830 | p->status = DIFF_STATUS_TYPE_CHANGED; | |
2831 | ||
2832 | /* from this point on, we are dealing with a pair | |
2833 | * whose both sides are valid and of the same type, i.e. | |
2834 | * either in-place edit or rename/copy edit. | |
2835 | */ | |
2836 | else if (DIFF_PAIR_RENAME(p)) { | |
64479711 LT |
2837 | /* |
2838 | * A rename might have re-connected a broken | |
2839 | * pair up, causing the pathnames to be the | |
2840 | * same again. If so, that's not a rename at | |
2841 | * all, just a modification.. | |
2842 | * | |
2843 | * Otherwise, see if this source was used for | |
2844 | * multiple renames, in which case we decrement | |
2845 | * the count, and call it a copy. | |
6973dcae | 2846 | */ |
64479711 LT |
2847 | if (!strcmp(p->one->path, p->two->path)) |
2848 | p->status = DIFF_STATUS_MODIFIED; | |
2849 | else if (--p->one->rename_used > 0) | |
6973dcae | 2850 | p->status = DIFF_STATUS_COPIED; |
64479711 | 2851 | else |
6973dcae JH |
2852 | p->status = DIFF_STATUS_RENAMED; |
2853 | } | |
a89fccd2 | 2854 | else if (hashcmp(p->one->sha1, p->two->sha1) || |
d516c2d1 JS |
2855 | p->one->mode != p->two->mode || |
2856 | is_null_sha1(p->one->sha1)) | |
6973dcae JH |
2857 | p->status = DIFF_STATUS_MODIFIED; |
2858 | else { | |
2859 | /* This is a "no-change" entry and should not | |
2860 | * happen anymore, but prepare for broken callers. | |
2861 | */ | |
2862 | error("feeding unmodified %s to diffcore", | |
2863 | p->one->path); | |
2864 | p->status = DIFF_STATUS_UNKNOWN; | |
2865 | } | |
2866 | } | |
2867 | diff_debug_queue("resolve-rename-copy done", q); | |
2868 | } | |
2869 | ||
c6744349 | 2870 | static int check_pair_status(struct diff_filepair *p) |
6973dcae | 2871 | { |
6973dcae JH |
2872 | switch (p->status) { |
2873 | case DIFF_STATUS_UNKNOWN: | |
c6744349 | 2874 | return 0; |
6973dcae JH |
2875 | case 0: |
2876 | die("internal error in diff-resolve-rename-copy"); | |
6973dcae | 2877 | default: |
c6744349 | 2878 | return 1; |
6973dcae JH |
2879 | } |
2880 | } | |
2881 | ||
c6744349 TH |
2882 | static void flush_one_pair(struct diff_filepair *p, struct diff_options *opt) |
2883 | { | |
2884 | int fmt = opt->output_format; | |
2885 | ||
2886 | if (fmt & DIFF_FORMAT_CHECKDIFF) | |
2887 | diff_flush_checkdiff(p, opt); | |
2888 | else if (fmt & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS)) | |
2889 | diff_flush_raw(p, opt); | |
cd676a51 JH |
2890 | else if (fmt & DIFF_FORMAT_NAME) { |
2891 | const char *name_a, *name_b; | |
2892 | name_a = p->two->path; | |
2893 | name_b = NULL; | |
2894 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 | 2895 | write_name_quoted(name_a, opt->file, opt->line_termination); |
cd676a51 | 2896 | } |
c6744349 TH |
2897 | } |
2898 | ||
c0c77734 | 2899 | static void show_file_mode_name(FILE *file, const char *newdelete, struct diff_filespec *fs) |
4bbd261b SE |
2900 | { |
2901 | if (fs->mode) | |
c0c77734 | 2902 | fprintf(file, " %s mode %06o ", newdelete, fs->mode); |
4bbd261b | 2903 | else |
c0c77734 DB |
2904 | fprintf(file, " %s ", newdelete); |
2905 | write_name_quoted(fs->path, file, '\n'); | |
4bbd261b SE |
2906 | } |
2907 | ||
2908 | ||
c0c77734 | 2909 | static void show_mode_change(FILE *file, struct diff_filepair *p, int show_name) |
4bbd261b SE |
2910 | { |
2911 | if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) { | |
c0c77734 | 2912 | fprintf(file, " mode change %06o => %06o%c", p->one->mode, p->two->mode, |
663af342 | 2913 | show_name ? ' ' : '\n'); |
0d26a64e | 2914 | if (show_name) { |
c0c77734 | 2915 | write_name_quoted(p->two->path, file, '\n'); |
0d26a64e | 2916 | } |
4bbd261b SE |
2917 | } |
2918 | } | |
2919 | ||
c0c77734 | 2920 | static void show_rename_copy(FILE *file, const char *renamecopy, struct diff_filepair *p) |
4bbd261b | 2921 | { |
b9f44164 | 2922 | char *names = pprint_rename(p->one->path, p->two->path); |
4bbd261b | 2923 | |
c0c77734 | 2924 | fprintf(file, " %s %s (%d%%)\n", renamecopy, names, similarity_index(p)); |
b9f44164 | 2925 | free(names); |
c0c77734 | 2926 | show_mode_change(file, p, 0); |
4bbd261b SE |
2927 | } |
2928 | ||
c0c77734 | 2929 | static void diff_summary(FILE *file, struct diff_filepair *p) |
4bbd261b SE |
2930 | { |
2931 | switch(p->status) { | |
2932 | case DIFF_STATUS_DELETED: | |
c0c77734 | 2933 | show_file_mode_name(file, "delete", p->one); |
4bbd261b SE |
2934 | break; |
2935 | case DIFF_STATUS_ADDED: | |
c0c77734 | 2936 | show_file_mode_name(file, "create", p->two); |
4bbd261b SE |
2937 | break; |
2938 | case DIFF_STATUS_COPIED: | |
c0c77734 | 2939 | show_rename_copy(file, "copy", p); |
4bbd261b SE |
2940 | break; |
2941 | case DIFF_STATUS_RENAMED: | |
c0c77734 | 2942 | show_rename_copy(file, "rename", p); |
4bbd261b SE |
2943 | break; |
2944 | default: | |
2945 | if (p->score) { | |
c0c77734 DB |
2946 | fputs(" rewrite ", file); |
2947 | write_name_quoted(p->two->path, file, ' '); | |
2948 | fprintf(file, "(%d%%)\n", similarity_index(p)); | |
663af342 | 2949 | } |
c0c77734 | 2950 | show_mode_change(file, p, !p->score); |
4bbd261b SE |
2951 | break; |
2952 | } | |
2953 | } | |
2954 | ||
fcb3d0ad JS |
2955 | struct patch_id_t { |
2956 | struct xdiff_emit_state xm; | |
2957 | SHA_CTX *ctx; | |
2958 | int patchlen; | |
2959 | }; | |
2960 | ||
2961 | static int remove_space(char *line, int len) | |
2962 | { | |
2963 | int i; | |
663af342 PH |
2964 | char *dst = line; |
2965 | unsigned char c; | |
fcb3d0ad | 2966 | |
663af342 PH |
2967 | for (i = 0; i < len; i++) |
2968 | if (!isspace((c = line[i]))) | |
2969 | *dst++ = c; | |
fcb3d0ad | 2970 | |
663af342 | 2971 | return dst - line; |
fcb3d0ad JS |
2972 | } |
2973 | ||
2974 | static void patch_id_consume(void *priv, char *line, unsigned long len) | |
2975 | { | |
2976 | struct patch_id_t *data = priv; | |
2977 | int new_len; | |
2978 | ||
2979 | /* Ignore line numbers when computing the SHA1 of the patch */ | |
cc44c765 | 2980 | if (!prefixcmp(line, "@@ -")) |
fcb3d0ad JS |
2981 | return; |
2982 | ||
2983 | new_len = remove_space(line, len); | |
2984 | ||
2985 | SHA1_Update(data->ctx, line, new_len); | |
2986 | data->patchlen += new_len; | |
2987 | } | |
2988 | ||
2989 | /* returns 0 upon success, and writes result into sha1 */ | |
2990 | static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1) | |
2991 | { | |
2992 | struct diff_queue_struct *q = &diff_queued_diff; | |
2993 | int i; | |
2994 | SHA_CTX ctx; | |
2995 | struct patch_id_t data; | |
2996 | char buffer[PATH_MAX * 4 + 20]; | |
2997 | ||
2998 | SHA1_Init(&ctx); | |
2999 | memset(&data, 0, sizeof(struct patch_id_t)); | |
3000 | data.ctx = &ctx; | |
3001 | data.xm.consume = patch_id_consume; | |
3002 | ||
3003 | for (i = 0; i < q->nr; i++) { | |
3004 | xpparam_t xpp; | |
3005 | xdemitconf_t xecfg; | |
3006 | xdemitcb_t ecb; | |
3007 | mmfile_t mf1, mf2; | |
3008 | struct diff_filepair *p = q->queue[i]; | |
3009 | int len1, len2; | |
3010 | ||
30b25010 | 3011 | memset(&xecfg, 0, sizeof(xecfg)); |
fcb3d0ad JS |
3012 | if (p->status == 0) |
3013 | return error("internal diff status error"); | |
3014 | if (p->status == DIFF_STATUS_UNKNOWN) | |
3015 | continue; | |
3016 | if (diff_unmodified_pair(p)) | |
3017 | continue; | |
3018 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
3019 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
3020 | continue; | |
3021 | if (DIFF_PAIR_UNMERGED(p)) | |
3022 | continue; | |
3023 | ||
3024 | diff_fill_sha1_info(p->one); | |
3025 | diff_fill_sha1_info(p->two); | |
3026 | if (fill_mmfile(&mf1, p->one) < 0 || | |
3027 | fill_mmfile(&mf2, p->two) < 0) | |
3028 | return error("unable to read files to diff"); | |
3029 | ||
fcb3d0ad JS |
3030 | len1 = remove_space(p->one->path, strlen(p->one->path)); |
3031 | len2 = remove_space(p->two->path, strlen(p->two->path)); | |
3032 | if (p->one->mode == 0) | |
3033 | len1 = snprintf(buffer, sizeof(buffer), | |
3034 | "diff--gita/%.*sb/%.*s" | |
3035 | "newfilemode%06o" | |
3036 | "---/dev/null" | |
3037 | "+++b/%.*s", | |
3038 | len1, p->one->path, | |
3039 | len2, p->two->path, | |
3040 | p->two->mode, | |
3041 | len2, p->two->path); | |
3042 | else if (p->two->mode == 0) | |
3043 | len1 = snprintf(buffer, sizeof(buffer), | |
3044 | "diff--gita/%.*sb/%.*s" | |
3045 | "deletedfilemode%06o" | |
3046 | "---a/%.*s" | |
3047 | "+++/dev/null", | |
3048 | len1, p->one->path, | |
3049 | len2, p->two->path, | |
3050 | p->one->mode, | |
3051 | len1, p->one->path); | |
3052 | else | |
3053 | len1 = snprintf(buffer, sizeof(buffer), | |
3054 | "diff--gita/%.*sb/%.*s" | |
3055 | "---a/%.*s" | |
3056 | "+++b/%.*s", | |
3057 | len1, p->one->path, | |
3058 | len2, p->two->path, | |
3059 | len1, p->one->path, | |
3060 | len2, p->two->path); | |
3061 | SHA1_Update(&ctx, buffer, len1); | |
3062 | ||
3063 | xpp.flags = XDF_NEED_MINIMAL; | |
3064 | xecfg.ctxlen = 3; | |
9fdc3bb5 | 3065 | xecfg.flags = XDL_EMIT_FUNCNAMES; |
fcb3d0ad JS |
3066 | ecb.outf = xdiff_outf; |
3067 | ecb.priv = &data; | |
c279d7e9 | 3068 | xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); |
fcb3d0ad JS |
3069 | } |
3070 | ||
3071 | SHA1_Final(sha1, &ctx); | |
3072 | return 0; | |
3073 | } | |
3074 | ||
3075 | int diff_flush_patch_id(struct diff_options *options, unsigned char *sha1) | |
3076 | { | |
3077 | struct diff_queue_struct *q = &diff_queued_diff; | |
3078 | int i; | |
3079 | int result = diff_get_patch_id(options, sha1); | |
3080 | ||
3081 | for (i = 0; i < q->nr; i++) | |
3082 | diff_free_filepair(q->queue[i]); | |
3083 | ||
3084 | free(q->queue); | |
3085 | q->queue = NULL; | |
3086 | q->nr = q->alloc = 0; | |
3087 | ||
3088 | return result; | |
3089 | } | |
3090 | ||
946c3784 | 3091 | static int is_summary_empty(const struct diff_queue_struct *q) |
6973dcae | 3092 | { |
6973dcae | 3093 | int i; |
6973dcae | 3094 | |
946c3784 TH |
3095 | for (i = 0; i < q->nr; i++) { |
3096 | const struct diff_filepair *p = q->queue[i]; | |
3097 | ||
3098 | switch (p->status) { | |
3099 | case DIFF_STATUS_DELETED: | |
3100 | case DIFF_STATUS_ADDED: | |
3101 | case DIFF_STATUS_COPIED: | |
3102 | case DIFF_STATUS_RENAMED: | |
3103 | return 0; | |
3104 | default: | |
3105 | if (p->score) | |
3106 | return 0; | |
3107 | if (p->one->mode && p->two->mode && | |
3108 | p->one->mode != p->two->mode) | |
3109 | return 0; | |
3110 | break; | |
3111 | } | |
6973dcae | 3112 | } |
946c3784 TH |
3113 | return 1; |
3114 | } | |
3115 | ||
6973dcae JH |
3116 | void diff_flush(struct diff_options *options) |
3117 | { | |
3118 | struct diff_queue_struct *q = &diff_queued_diff; | |
c6744349 | 3119 | int i, output_format = options->output_format; |
946c3784 | 3120 | int separator = 0; |
6973dcae | 3121 | |
c6744349 TH |
3122 | /* |
3123 | * Order: raw, stat, summary, patch | |
3124 | * or: name/name-status/checkdiff (other bits clear) | |
3125 | */ | |
946c3784 TH |
3126 | if (!q->nr) |
3127 | goto free_queue; | |
6973dcae | 3128 | |
c6744349 TH |
3129 | if (output_format & (DIFF_FORMAT_RAW | |
3130 | DIFF_FORMAT_NAME | | |
3131 | DIFF_FORMAT_NAME_STATUS | | |
3132 | DIFF_FORMAT_CHECKDIFF)) { | |
6973dcae JH |
3133 | for (i = 0; i < q->nr; i++) { |
3134 | struct diff_filepair *p = q->queue[i]; | |
c6744349 TH |
3135 | if (check_pair_status(p)) |
3136 | flush_one_pair(p, options); | |
6973dcae | 3137 | } |
946c3784 | 3138 | separator++; |
6973dcae | 3139 | } |
c6744349 | 3140 | |
c04a7155 | 3141 | if (output_format & (DIFF_FORMAT_DIFFSTAT|DIFF_FORMAT_SHORTSTAT|DIFF_FORMAT_NUMSTAT)) { |
5e2b0636 | 3142 | struct diffstat_t diffstat; |
c6744349 | 3143 | |
5e2b0636 TH |
3144 | memset(&diffstat, 0, sizeof(struct diffstat_t)); |
3145 | diffstat.xm.consume = diffstat_consume; | |
6973dcae JH |
3146 | for (i = 0; i < q->nr; i++) { |
3147 | struct diff_filepair *p = q->queue[i]; | |
c6744349 | 3148 | if (check_pair_status(p)) |
5e2b0636 | 3149 | diff_flush_stat(p, options, &diffstat); |
6973dcae | 3150 | } |
74e2abe5 JH |
3151 | if (output_format & DIFF_FORMAT_NUMSTAT) |
3152 | show_numstat(&diffstat, options); | |
3153 | if (output_format & DIFF_FORMAT_DIFFSTAT) | |
3154 | show_stats(&diffstat, options); | |
f604652e | 3155 | if (output_format & DIFF_FORMAT_SHORTSTAT) |
c0c77734 | 3156 | show_shortstats(&diffstat, options); |
f604652e | 3157 | free_diffstat_info(&diffstat); |
3969cf7d | 3158 | separator++; |
6973dcae | 3159 | } |
c04a7155 JH |
3160 | if (output_format & DIFF_FORMAT_DIRSTAT) |
3161 | show_dirstat(options); | |
6973dcae | 3162 | |
946c3784 | 3163 | if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) { |
c6744349 | 3164 | for (i = 0; i < q->nr; i++) |
c0c77734 | 3165 | diff_summary(options->file, q->queue[i]); |
3969cf7d | 3166 | separator++; |
6973dcae JH |
3167 | } |
3168 | ||
c6744349 | 3169 | if (output_format & DIFF_FORMAT_PATCH) { |
946c3784 TH |
3170 | if (separator) { |
3171 | if (options->stat_sep) { | |
3172 | /* attach patch instead of inline */ | |
c0c77734 | 3173 | fputs(options->stat_sep, options->file); |
946c3784 | 3174 | } else { |
c0c77734 | 3175 | putc(options->line_termination, options->file); |
946c3784 | 3176 | } |
c6744349 TH |
3177 | } |
3178 | ||
3179 | for (i = 0; i < q->nr; i++) { | |
3180 | struct diff_filepair *p = q->queue[i]; | |
3181 | if (check_pair_status(p)) | |
3182 | diff_flush_patch(p, options); | |
3183 | } | |
4bbd261b SE |
3184 | } |
3185 | ||
04245581 JK |
3186 | if (output_format & DIFF_FORMAT_CALLBACK) |
3187 | options->format_callback(q, options, options->format_callback_data); | |
3188 | ||
c6744349 TH |
3189 | for (i = 0; i < q->nr; i++) |
3190 | diff_free_filepair(q->queue[i]); | |
946c3784 | 3191 | free_queue: |
6973dcae JH |
3192 | free(q->queue); |
3193 | q->queue = NULL; | |
3194 | q->nr = q->alloc = 0; | |
c0c77734 DB |
3195 | if (options->close_file) |
3196 | fclose(options->file); | |
6973dcae JH |
3197 | } |
3198 | ||
3199 | static void diffcore_apply_filter(const char *filter) | |
3200 | { | |
3201 | int i; | |
3202 | struct diff_queue_struct *q = &diff_queued_diff; | |
3203 | struct diff_queue_struct outq; | |
3204 | outq.queue = NULL; | |
3205 | outq.nr = outq.alloc = 0; | |
3206 | ||
3207 | if (!filter) | |
3208 | return; | |
3209 | ||
3210 | if (strchr(filter, DIFF_STATUS_FILTER_AON)) { | |
3211 | int found; | |
3212 | for (i = found = 0; !found && i < q->nr; i++) { | |
3213 | struct diff_filepair *p = q->queue[i]; | |
3214 | if (((p->status == DIFF_STATUS_MODIFIED) && | |
3215 | ((p->score && | |
3216 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
3217 | (!p->score && | |
3218 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
3219 | ((p->status != DIFF_STATUS_MODIFIED) && | |
3220 | strchr(filter, p->status))) | |
3221 | found++; | |
3222 | } | |
3223 | if (found) | |
3224 | return; | |
3225 | ||
3226 | /* otherwise we will clear the whole queue | |
3227 | * by copying the empty outq at the end of this | |
3228 | * function, but first clear the current entries | |
3229 | * in the queue. | |
3230 | */ | |
3231 | for (i = 0; i < q->nr; i++) | |
3232 | diff_free_filepair(q->queue[i]); | |
3233 | } | |
3234 | else { | |
3235 | /* Only the matching ones */ | |
3236 | for (i = 0; i < q->nr; i++) { | |
3237 | struct diff_filepair *p = q->queue[i]; | |
3238 | ||
3239 | if (((p->status == DIFF_STATUS_MODIFIED) && | |
3240 | ((p->score && | |
3241 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
3242 | (!p->score && | |
3243 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
3244 | ((p->status != DIFF_STATUS_MODIFIED) && | |
3245 | strchr(filter, p->status))) | |
3246 | diff_q(&outq, p); | |
3247 | else | |
3248 | diff_free_filepair(p); | |
3249 | } | |
3250 | } | |
3251 | free(q->queue); | |
3252 | *q = outq; | |
3253 | } | |
3254 | ||
5701115a SV |
3255 | /* Check whether two filespecs with the same mode and size are identical */ |
3256 | static int diff_filespec_is_identical(struct diff_filespec *one, | |
3257 | struct diff_filespec *two) | |
3258 | { | |
2b459b48 JH |
3259 | if (S_ISGITLINK(one->mode)) |
3260 | return 0; | |
5701115a SV |
3261 | if (diff_populate_filespec(one, 0)) |
3262 | return 0; | |
3263 | if (diff_populate_filespec(two, 0)) | |
3264 | return 0; | |
3265 | return !memcmp(one->data, two->data, one->size); | |
3266 | } | |
3267 | ||
fb13227e JH |
3268 | static void diffcore_skip_stat_unmatch(struct diff_options *diffopt) |
3269 | { | |
3270 | int i; | |
3271 | struct diff_queue_struct *q = &diff_queued_diff; | |
3272 | struct diff_queue_struct outq; | |
3273 | outq.queue = NULL; | |
3274 | outq.nr = outq.alloc = 0; | |
3275 | ||
3276 | for (i = 0; i < q->nr; i++) { | |
3277 | struct diff_filepair *p = q->queue[i]; | |
3278 | ||
3279 | /* | |
3280 | * 1. Entries that come from stat info dirtyness | |
3281 | * always have both sides (iow, not create/delete), | |
3282 | * one side of the object name is unknown, with | |
3283 | * the same mode and size. Keep the ones that | |
3284 | * do not match these criteria. They have real | |
3285 | * differences. | |
3286 | * | |
3287 | * 2. At this point, the file is known to be modified, | |
3288 | * with the same mode and size, and the object | |
3289 | * name of one side is unknown. Need to inspect | |
3290 | * the identical contents. | |
3291 | */ | |
3292 | if (!DIFF_FILE_VALID(p->one) || /* (1) */ | |
3293 | !DIFF_FILE_VALID(p->two) || | |
3294 | (p->one->sha1_valid && p->two->sha1_valid) || | |
3295 | (p->one->mode != p->two->mode) || | |
3296 | diff_populate_filespec(p->one, 1) || | |
3297 | diff_populate_filespec(p->two, 1) || | |
3298 | (p->one->size != p->two->size) || | |
5701115a | 3299 | !diff_filespec_is_identical(p->one, p->two)) /* (2) */ |
fb13227e JH |
3300 | diff_q(&outq, p); |
3301 | else { | |
3302 | /* | |
3303 | * The caller can subtract 1 from skip_stat_unmatch | |
3304 | * to determine how many paths were dirty only | |
3305 | * due to stat info mismatch. | |
3306 | */ | |
8f67f8ae | 3307 | if (!DIFF_OPT_TST(diffopt, NO_INDEX)) |
6d2d9e86 | 3308 | diffopt->skip_stat_unmatch++; |
fb13227e JH |
3309 | diff_free_filepair(p); |
3310 | } | |
3311 | } | |
3312 | free(q->queue); | |
3313 | *q = outq; | |
3314 | } | |
3315 | ||
6973dcae JH |
3316 | void diffcore_std(struct diff_options *options) |
3317 | { | |
8f67f8ae | 3318 | if (DIFF_OPT_TST(options, QUIET)) |
68aacb2f | 3319 | return; |
706098af | 3320 | |
8f67f8ae | 3321 | if (options->skip_stat_unmatch && !DIFF_OPT_TST(options, FIND_COPIES_HARDER)) |
fb13227e | 3322 | diffcore_skip_stat_unmatch(options); |
6973dcae JH |
3323 | if (options->break_opt != -1) |
3324 | diffcore_break(options->break_opt); | |
3325 | if (options->detect_rename) | |
3326 | diffcore_rename(options); | |
3327 | if (options->break_opt != -1) | |
3328 | diffcore_merge_broken(); | |
3329 | if (options->pickaxe) | |
3330 | diffcore_pickaxe(options->pickaxe, options->pickaxe_opts); | |
3331 | if (options->orderfile) | |
3332 | diffcore_order(options->orderfile); | |
3333 | diff_resolve_rename_copy(); | |
3334 | diffcore_apply_filter(options->filter); | |
68aacb2f | 3335 | |
8f67f8ae PH |
3336 | if (diff_queued_diff.nr) |
3337 | DIFF_OPT_SET(options, HAS_CHANGES); | |
3338 | else | |
3339 | DIFF_OPT_CLR(options, HAS_CHANGES); | |
6973dcae JH |
3340 | } |
3341 | ||
da31b358 JH |
3342 | int diff_result_code(struct diff_options *opt, int status) |
3343 | { | |
3344 | int result = 0; | |
3345 | if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && | |
3346 | !(opt->output_format & DIFF_FORMAT_CHECKDIFF)) | |
3347 | return status; | |
3348 | if (DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && | |
3349 | DIFF_OPT_TST(opt, HAS_CHANGES)) | |
3350 | result |= 01; | |
3351 | if ((opt->output_format & DIFF_FORMAT_CHECKDIFF) && | |
3352 | DIFF_OPT_TST(opt, CHECK_FAILED)) | |
3353 | result |= 02; | |
3354 | return result; | |
3355 | } | |
6973dcae | 3356 | |
6973dcae JH |
3357 | void diff_addremove(struct diff_options *options, |
3358 | int addremove, unsigned mode, | |
3359 | const unsigned char *sha1, | |
fd55a19e | 3360 | const char *concatpath) |
6973dcae | 3361 | { |
6973dcae JH |
3362 | struct diff_filespec *one, *two; |
3363 | ||
50fd9bd8 JS |
3364 | if (DIFF_OPT_TST(options, IGNORE_SUBMODULES) && S_ISGITLINK(mode)) |
3365 | return; | |
3366 | ||
6973dcae JH |
3367 | /* This may look odd, but it is a preparation for |
3368 | * feeding "there are unchanged files which should | |
3369 | * not produce diffs, but when you are doing copy | |
3370 | * detection you would need them, so here they are" | |
3371 | * entries to the diff-core. They will be prefixed | |
3372 | * with something like '=' or '*' (I haven't decided | |
3373 | * which but should not make any difference). | |
a6080a0a | 3374 | * Feeding the same new and old to diff_change() |
6973dcae JH |
3375 | * also has the same effect. |
3376 | * Before the final output happens, they are pruned after | |
3377 | * merged into rename/copy pairs as appropriate. | |
3378 | */ | |
8f67f8ae | 3379 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) |
6973dcae JH |
3380 | addremove = (addremove == '+' ? '-' : |
3381 | addremove == '-' ? '+' : addremove); | |
3382 | ||
cd676a51 JH |
3383 | if (options->prefix && |
3384 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
3385 | return; | |
3386 | ||
6973dcae JH |
3387 | one = alloc_filespec(concatpath); |
3388 | two = alloc_filespec(concatpath); | |
3389 | ||
3390 | if (addremove != '+') | |
3391 | fill_filespec(one, sha1, mode); | |
3392 | if (addremove != '-') | |
3393 | fill_filespec(two, sha1, mode); | |
3394 | ||
3395 | diff_queue(&diff_queued_diff, one, two); | |
8f67f8ae | 3396 | DIFF_OPT_SET(options, HAS_CHANGES); |
6973dcae JH |
3397 | } |
3398 | ||
3399 | void diff_change(struct diff_options *options, | |
3400 | unsigned old_mode, unsigned new_mode, | |
3401 | const unsigned char *old_sha1, | |
3402 | const unsigned char *new_sha1, | |
fd55a19e | 3403 | const char *concatpath) |
6973dcae | 3404 | { |
6973dcae JH |
3405 | struct diff_filespec *one, *two; |
3406 | ||
50fd9bd8 JS |
3407 | if (DIFF_OPT_TST(options, IGNORE_SUBMODULES) && S_ISGITLINK(old_mode) |
3408 | && S_ISGITLINK(new_mode)) | |
3409 | return; | |
3410 | ||
8f67f8ae | 3411 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) { |
6973dcae JH |
3412 | unsigned tmp; |
3413 | const unsigned char *tmp_c; | |
3414 | tmp = old_mode; old_mode = new_mode; new_mode = tmp; | |
3415 | tmp_c = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_c; | |
3416 | } | |
cd676a51 JH |
3417 | |
3418 | if (options->prefix && | |
3419 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
3420 | return; | |
3421 | ||
6973dcae JH |
3422 | one = alloc_filespec(concatpath); |
3423 | two = alloc_filespec(concatpath); | |
3424 | fill_filespec(one, old_sha1, old_mode); | |
3425 | fill_filespec(two, new_sha1, new_mode); | |
3426 | ||
3427 | diff_queue(&diff_queued_diff, one, two); | |
8f67f8ae | 3428 | DIFF_OPT_SET(options, HAS_CHANGES); |
6973dcae JH |
3429 | } |
3430 | ||
3431 | void diff_unmerge(struct diff_options *options, | |
e9c84099 JH |
3432 | const char *path, |
3433 | unsigned mode, const unsigned char *sha1) | |
6973dcae JH |
3434 | { |
3435 | struct diff_filespec *one, *two; | |
cd676a51 JH |
3436 | |
3437 | if (options->prefix && | |
3438 | strncmp(path, options->prefix, options->prefix_length)) | |
3439 | return; | |
3440 | ||
6973dcae JH |
3441 | one = alloc_filespec(path); |
3442 | two = alloc_filespec(path); | |
e9c84099 JH |
3443 | fill_filespec(one, sha1, mode); |
3444 | diff_queue(&diff_queued_diff, one, two)->is_unmerged = 1; | |
6973dcae | 3445 | } |