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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 JH |
133 | { |
134 | if (!strcmp(var, "diff.renamelimit")) { | |
135 | diff_rename_limit_default = git_config_int(var, value); | |
136 | return 0; | |
137 | } | |
a159ca0c | 138 | if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) { |
0f6f5a40 | 139 | diff_use_color_default = git_config_colorbool(var, value, -1); |
801235c5 JH |
140 | return 0; |
141 | } | |
b68ea12e EW |
142 | if (!strcmp(var, "diff.renames")) { |
143 | if (!value) | |
144 | diff_detect_rename_default = DIFF_DETECT_RENAME; | |
145 | else if (!strcasecmp(value, "copies") || | |
146 | !strcasecmp(value, "copy")) | |
147 | diff_detect_rename_default = DIFF_DETECT_COPY; | |
148 | else if (git_config_bool(var,value)) | |
149 | diff_detect_rename_default = DIFF_DETECT_RENAME; | |
150 | return 0; | |
151 | } | |
aecbf914 JH |
152 | if (!strcmp(var, "diff.autorefreshindex")) { |
153 | diff_auto_refresh_index = git_config_bool(var, value); | |
154 | return 0; | |
155 | } | |
cbe02100 | 156 | if (!strcmp(var, "diff.external")) { |
64f30e94 JH |
157 | if (!value) |
158 | return config_error_nonbool(var); | |
cbe02100 JS |
159 | external_diff_cmd_cfg = xstrdup(value); |
160 | return 0; | |
161 | } | |
f1af60bd JH |
162 | if (!prefixcmp(var, "diff.")) { |
163 | const char *ep = strrchr(var, '.'); | |
164 | ||
2c778210 CC |
165 | if (ep != var + 4 && !strcmp(ep, ".command")) |
166 | return parse_lldiff_command(var, ep, value); | |
f1af60bd | 167 | } |
9a1805a8 | 168 | |
ef90d6d4 | 169 | return git_diff_basic_config(var, value, cb); |
9a1805a8 JK |
170 | } |
171 | ||
ef90d6d4 | 172 | int git_diff_basic_config(const char *var, const char *value, void *cb) |
9a1805a8 | 173 | { |
1968d77d | 174 | if (!prefixcmp(var, "diff.color.") || !prefixcmp(var, "color.diff.")) { |
801235c5 | 175 | int slot = parse_diff_color_slot(var, 11); |
64f30e94 JH |
176 | if (!value) |
177 | return config_error_nonbool(var); | |
7c92fe0e | 178 | color_parse(value, var, diff_colors[slot]); |
801235c5 JH |
179 | return 0; |
180 | } | |
f1af60bd | 181 | |
e467193f JK |
182 | if (!prefixcmp(var, "diff.")) { |
183 | const char *ep = strrchr(var, '.'); | |
184 | if (ep != var + 4) { | |
64f30e94 JH |
185 | if (!strcmp(ep, ".funcname")) { |
186 | if (!value) | |
187 | return config_error_nonbool(var); | |
e467193f | 188 | return parse_funcname_pattern(var, ep, value); |
64f30e94 | 189 | } |
e467193f JK |
190 | } |
191 | } | |
192 | ||
ef90d6d4 | 193 | return git_color_default_config(var, value, cb); |
801235c5 JH |
194 | } |
195 | ||
6973dcae JH |
196 | static char *quote_two(const char *one, const char *two) |
197 | { | |
198 | int need_one = quote_c_style(one, NULL, NULL, 1); | |
199 | int need_two = quote_c_style(two, NULL, NULL, 1); | |
663af342 | 200 | struct strbuf res; |
6973dcae | 201 | |
663af342 | 202 | strbuf_init(&res, 0); |
6973dcae | 203 | if (need_one + need_two) { |
663af342 PH |
204 | strbuf_addch(&res, '"'); |
205 | quote_c_style(one, &res, NULL, 1); | |
206 | quote_c_style(two, &res, NULL, 1); | |
207 | strbuf_addch(&res, '"'); | |
208 | } else { | |
209 | strbuf_addstr(&res, one); | |
210 | strbuf_addstr(&res, two); | |
6973dcae | 211 | } |
b315c5c0 | 212 | return strbuf_detach(&res, NULL); |
6973dcae JH |
213 | } |
214 | ||
215 | static const char *external_diff(void) | |
216 | { | |
217 | static const char *external_diff_cmd = NULL; | |
218 | static int done_preparing = 0; | |
219 | ||
220 | if (done_preparing) | |
221 | return external_diff_cmd; | |
222 | external_diff_cmd = getenv("GIT_EXTERNAL_DIFF"); | |
cbe02100 JS |
223 | if (!external_diff_cmd) |
224 | external_diff_cmd = external_diff_cmd_cfg; | |
6973dcae JH |
225 | done_preparing = 1; |
226 | return external_diff_cmd; | |
227 | } | |
228 | ||
6973dcae JH |
229 | static struct diff_tempfile { |
230 | const char *name; /* filename external diff should read from */ | |
231 | char hex[41]; | |
232 | char mode[10]; | |
1472966c | 233 | char tmp_path[PATH_MAX]; |
6973dcae JH |
234 | } diff_temp[2]; |
235 | ||
236 | static int count_lines(const char *data, int size) | |
237 | { | |
238 | int count, ch, completely_empty = 1, nl_just_seen = 0; | |
239 | count = 0; | |
240 | while (0 < size--) { | |
241 | ch = *data++; | |
242 | if (ch == '\n') { | |
243 | count++; | |
244 | nl_just_seen = 1; | |
245 | completely_empty = 0; | |
246 | } | |
247 | else { | |
248 | nl_just_seen = 0; | |
249 | completely_empty = 0; | |
250 | } | |
251 | } | |
252 | if (completely_empty) | |
253 | return 0; | |
254 | if (!nl_just_seen) | |
255 | count++; /* no trailing newline */ | |
256 | return count; | |
257 | } | |
258 | ||
c0c77734 | 259 | static void print_line_count(FILE *file, int count) |
6973dcae JH |
260 | { |
261 | switch (count) { | |
262 | case 0: | |
c0c77734 | 263 | fprintf(file, "0,0"); |
6973dcae JH |
264 | break; |
265 | case 1: | |
c0c77734 | 266 | fprintf(file, "1"); |
6973dcae JH |
267 | break; |
268 | default: | |
c0c77734 | 269 | fprintf(file, "1,%d", count); |
6973dcae JH |
270 | break; |
271 | } | |
272 | } | |
273 | ||
c0c77734 DB |
274 | static void copy_file_with_prefix(FILE *file, |
275 | int prefix, const char *data, int size, | |
1468bd47 | 276 | const char *set, const char *reset) |
6973dcae JH |
277 | { |
278 | int ch, nl_just_seen = 1; | |
279 | while (0 < size--) { | |
280 | ch = *data++; | |
13e36ec5 | 281 | if (nl_just_seen) { |
c0c77734 DB |
282 | fputs(set, file); |
283 | putc(prefix, file); | |
13e36ec5 JS |
284 | } |
285 | if (ch == '\n') { | |
6973dcae | 286 | nl_just_seen = 1; |
c0c77734 | 287 | fputs(reset, file); |
13e36ec5 | 288 | } else |
6973dcae | 289 | nl_just_seen = 0; |
c0c77734 | 290 | putc(ch, file); |
6973dcae JH |
291 | } |
292 | if (!nl_just_seen) | |
c0c77734 | 293 | fprintf(file, "%s\n\\ No newline at end of file\n", reset); |
6973dcae JH |
294 | } |
295 | ||
296 | static void emit_rewrite_diff(const char *name_a, | |
297 | const char *name_b, | |
298 | struct diff_filespec *one, | |
13e36ec5 | 299 | struct diff_filespec *two, |
eab9a40b | 300 | struct diff_options *o) |
6973dcae JH |
301 | { |
302 | int lc_a, lc_b; | |
eab9a40b | 303 | int color_diff = DIFF_OPT_TST(o, COLOR_DIFF); |
1a9eb3b9 | 304 | const char *name_a_tab, *name_b_tab; |
13e36ec5 JS |
305 | const char *metainfo = diff_get_color(color_diff, DIFF_METAINFO); |
306 | const char *fraginfo = diff_get_color(color_diff, DIFF_FRAGINFO); | |
307 | const char *old = diff_get_color(color_diff, DIFF_FILE_OLD); | |
308 | const char *new = diff_get_color(color_diff, DIFF_FILE_NEW); | |
309 | const char *reset = diff_get_color(color_diff, DIFF_RESET); | |
d5625091 | 310 | static struct strbuf a_name = STRBUF_INIT, b_name = STRBUF_INIT; |
1a9eb3b9 | 311 | |
8a13becc JH |
312 | name_a += (*name_a == '/'); |
313 | name_b += (*name_b == '/'); | |
1a9eb3b9 JH |
314 | name_a_tab = strchr(name_a, ' ') ? "\t" : ""; |
315 | name_b_tab = strchr(name_b, ' ') ? "\t" : ""; | |
316 | ||
d5625091 JH |
317 | strbuf_reset(&a_name); |
318 | strbuf_reset(&b_name); | |
319 | quote_two_c_style(&a_name, o->a_prefix, name_a, 0); | |
320 | quote_two_c_style(&b_name, o->b_prefix, name_b, 0); | |
321 | ||
6973dcae JH |
322 | diff_populate_filespec(one, 0); |
323 | diff_populate_filespec(two, 0); | |
324 | lc_a = count_lines(one->data, one->size); | |
325 | lc_b = count_lines(two->data, two->size); | |
c0c77734 DB |
326 | fprintf(o->file, |
327 | "%s--- %s%s%s\n%s+++ %s%s%s\n%s@@ -", | |
328 | metainfo, a_name.buf, name_a_tab, reset, | |
329 | metainfo, b_name.buf, name_b_tab, reset, fraginfo); | |
330 | print_line_count(o->file, lc_a); | |
331 | fprintf(o->file, " +"); | |
332 | print_line_count(o->file, lc_b); | |
333 | fprintf(o->file, " @@%s\n", reset); | |
6973dcae | 334 | if (lc_a) |
c0c77734 | 335 | copy_file_with_prefix(o->file, '-', one->data, one->size, old, reset); |
6973dcae | 336 | if (lc_b) |
c0c77734 | 337 | copy_file_with_prefix(o->file, '+', two->data, two->size, new, reset); |
6973dcae JH |
338 | } |
339 | ||
340 | static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one) | |
341 | { | |
342 | if (!DIFF_FILE_VALID(one)) { | |
d2543b8e | 343 | mf->ptr = (char *)""; /* does not matter */ |
6973dcae JH |
344 | mf->size = 0; |
345 | return 0; | |
346 | } | |
347 | else if (diff_populate_filespec(one, 0)) | |
348 | return -1; | |
349 | mf->ptr = one->data; | |
350 | mf->size = one->size; | |
351 | return 0; | |
352 | } | |
353 | ||
f59a59e2 JS |
354 | struct diff_words_buffer { |
355 | mmfile_t text; | |
356 | long alloc; | |
357 | long current; /* output pointer */ | |
358 | int suppressed_newline; | |
359 | }; | |
360 | ||
361 | static void diff_words_append(char *line, unsigned long len, | |
362 | struct diff_words_buffer *buffer) | |
363 | { | |
364 | if (buffer->text.size + len > buffer->alloc) { | |
365 | buffer->alloc = (buffer->text.size + len) * 3 / 2; | |
366 | buffer->text.ptr = xrealloc(buffer->text.ptr, buffer->alloc); | |
367 | } | |
368 | line++; | |
369 | len--; | |
370 | memcpy(buffer->text.ptr + buffer->text.size, line, len); | |
371 | buffer->text.size += len; | |
372 | } | |
373 | ||
374 | struct diff_words_data { | |
375 | struct xdiff_emit_state xm; | |
376 | struct diff_words_buffer minus, plus; | |
c0c77734 | 377 | FILE *file; |
f59a59e2 JS |
378 | }; |
379 | ||
c0c77734 | 380 | static void print_word(FILE *file, struct diff_words_buffer *buffer, int len, int color, |
f59a59e2 JS |
381 | int suppress_newline) |
382 | { | |
383 | const char *ptr; | |
384 | int eol = 0; | |
385 | ||
386 | if (len == 0) | |
387 | return; | |
388 | ||
389 | ptr = buffer->text.ptr + buffer->current; | |
390 | buffer->current += len; | |
391 | ||
392 | if (ptr[len - 1] == '\n') { | |
393 | eol = 1; | |
394 | len--; | |
395 | } | |
396 | ||
c0c77734 DB |
397 | fputs(diff_get_color(1, color), file); |
398 | fwrite(ptr, len, 1, file); | |
399 | fputs(diff_get_color(1, DIFF_RESET), file); | |
f59a59e2 JS |
400 | |
401 | if (eol) { | |
402 | if (suppress_newline) | |
403 | buffer->suppressed_newline = 1; | |
404 | else | |
c0c77734 | 405 | putc('\n', file); |
f59a59e2 JS |
406 | } |
407 | } | |
408 | ||
409 | static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len) | |
410 | { | |
411 | struct diff_words_data *diff_words = priv; | |
412 | ||
413 | if (diff_words->minus.suppressed_newline) { | |
414 | if (line[0] != '+') | |
c0c77734 | 415 | putc('\n', diff_words->file); |
f59a59e2 JS |
416 | diff_words->minus.suppressed_newline = 0; |
417 | } | |
418 | ||
419 | len--; | |
420 | switch (line[0]) { | |
421 | case '-': | |
c0c77734 DB |
422 | print_word(diff_words->file, |
423 | &diff_words->minus, len, DIFF_FILE_OLD, 1); | |
f59a59e2 JS |
424 | break; |
425 | case '+': | |
c0c77734 DB |
426 | print_word(diff_words->file, |
427 | &diff_words->plus, len, DIFF_FILE_NEW, 0); | |
f59a59e2 JS |
428 | break; |
429 | case ' ': | |
c0c77734 DB |
430 | print_word(diff_words->file, |
431 | &diff_words->plus, len, DIFF_PLAIN, 0); | |
f59a59e2 JS |
432 | diff_words->minus.current += len; |
433 | break; | |
434 | } | |
435 | } | |
436 | ||
437 | /* this executes the word diff on the accumulated buffers */ | |
438 | static void diff_words_show(struct diff_words_data *diff_words) | |
439 | { | |
440 | xpparam_t xpp; | |
441 | xdemitconf_t xecfg; | |
442 | xdemitcb_t ecb; | |
443 | mmfile_t minus, plus; | |
444 | int i; | |
445 | ||
30b25010 | 446 | memset(&xecfg, 0, sizeof(xecfg)); |
f59a59e2 JS |
447 | minus.size = diff_words->minus.text.size; |
448 | minus.ptr = xmalloc(minus.size); | |
449 | memcpy(minus.ptr, diff_words->minus.text.ptr, minus.size); | |
450 | for (i = 0; i < minus.size; i++) | |
451 | if (isspace(minus.ptr[i])) | |
452 | minus.ptr[i] = '\n'; | |
453 | diff_words->minus.current = 0; | |
454 | ||
455 | plus.size = diff_words->plus.text.size; | |
456 | plus.ptr = xmalloc(plus.size); | |
457 | memcpy(plus.ptr, diff_words->plus.text.ptr, plus.size); | |
458 | for (i = 0; i < plus.size; i++) | |
459 | if (isspace(plus.ptr[i])) | |
460 | plus.ptr[i] = '\n'; | |
461 | diff_words->plus.current = 0; | |
462 | ||
463 | xpp.flags = XDF_NEED_MINIMAL; | |
464 | xecfg.ctxlen = diff_words->minus.alloc + diff_words->plus.alloc; | |
f59a59e2 JS |
465 | ecb.outf = xdiff_outf; |
466 | ecb.priv = diff_words; | |
467 | diff_words->xm.consume = fn_out_diff_words_aux; | |
c279d7e9 | 468 | xdi_diff(&minus, &plus, &xpp, &xecfg, &ecb); |
f59a59e2 JS |
469 | |
470 | free(minus.ptr); | |
471 | free(plus.ptr); | |
472 | diff_words->minus.text.size = diff_words->plus.text.size = 0; | |
473 | ||
474 | if (diff_words->minus.suppressed_newline) { | |
c0c77734 | 475 | putc('\n', diff_words->file); |
f59a59e2 JS |
476 | diff_words->minus.suppressed_newline = 0; |
477 | } | |
478 | } | |
479 | ||
23707811 JH |
480 | typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len); |
481 | ||
6973dcae | 482 | struct emit_callback { |
cd112cef JS |
483 | struct xdiff_emit_state xm; |
484 | int nparents, color_diff; | |
cf1b7869 | 485 | unsigned ws_rule; |
23707811 | 486 | sane_truncate_fn truncate; |
6973dcae | 487 | const char **label_path; |
f59a59e2 | 488 | struct diff_words_data *diff_words; |
34a5e1a2 | 489 | int *found_changesp; |
c0c77734 | 490 | FILE *file; |
6973dcae JH |
491 | }; |
492 | ||
f59a59e2 JS |
493 | static void free_diff_words_data(struct emit_callback *ecbdata) |
494 | { | |
495 | if (ecbdata->diff_words) { | |
496 | /* flush buffers */ | |
497 | if (ecbdata->diff_words->minus.text.size || | |
498 | ecbdata->diff_words->plus.text.size) | |
499 | diff_words_show(ecbdata->diff_words); | |
500 | ||
8e0f7003 JM |
501 | free (ecbdata->diff_words->minus.text.ptr); |
502 | free (ecbdata->diff_words->plus.text.ptr); | |
f59a59e2 JS |
503 | free(ecbdata->diff_words); |
504 | ecbdata->diff_words = NULL; | |
505 | } | |
506 | } | |
507 | ||
ce436973 | 508 | const char *diff_get_color(int diff_use_color, enum color_diff ix) |
cd112cef JS |
509 | { |
510 | if (diff_use_color) | |
50f575fc LT |
511 | return diff_colors[ix]; |
512 | return ""; | |
cd112cef JS |
513 | } |
514 | ||
c0c77734 | 515 | static void emit_line(FILE *file, const char *set, const char *reset, const char *line, int len) |
448c3ef1 | 516 | { |
4afbcab9 JH |
517 | int has_trailing_newline = (len > 0 && line[len-1] == '\n'); |
518 | if (has_trailing_newline) | |
06ff64ae SG |
519 | len--; |
520 | ||
c0c77734 DB |
521 | fputs(set, file); |
522 | fwrite(line, len, 1, file); | |
523 | fputs(reset, file); | |
4afbcab9 JH |
524 | if (has_trailing_newline) |
525 | fputc('\n', file); | |
448c3ef1 JH |
526 | } |
527 | ||
c5a8c3ec JS |
528 | static void emit_add_line(const char *reset, struct emit_callback *ecbdata, const char *line, int len) |
529 | { | |
530 | const char *ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE); | |
531 | const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_NEW); | |
532 | ||
533 | if (!*ws) | |
c0c77734 | 534 | emit_line(ecbdata->file, set, reset, line, len); |
c1795bb0 WC |
535 | else { |
536 | /* Emit just the prefix, then the rest. */ | |
c0c77734 | 537 | emit_line(ecbdata->file, set, reset, line, ecbdata->nparents); |
8f8841e9 JH |
538 | ws_check_emit(line + ecbdata->nparents, |
539 | len - ecbdata->nparents, ecbdata->ws_rule, | |
540 | ecbdata->file, set, reset, ws); | |
c1795bb0 | 541 | } |
c5a8c3ec JS |
542 | } |
543 | ||
23707811 JH |
544 | static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, unsigned long len) |
545 | { | |
546 | const char *cp; | |
547 | unsigned long allot; | |
548 | size_t l = len; | |
549 | ||
550 | if (ecb->truncate) | |
551 | return ecb->truncate(line, len); | |
552 | cp = line; | |
553 | allot = l; | |
554 | while (0 < l) { | |
555 | (void) utf8_width(&cp, &l); | |
556 | if (!cp) | |
557 | break; /* truncated in the middle? */ | |
558 | } | |
559 | return allot - l; | |
560 | } | |
561 | ||
cd112cef | 562 | static void fn_out_consume(void *priv, char *line, unsigned long len) |
6973dcae JH |
563 | { |
564 | int i; | |
448c3ef1 | 565 | int color; |
6973dcae | 566 | struct emit_callback *ecbdata = priv; |
472ca780 JK |
567 | const char *meta = diff_get_color(ecbdata->color_diff, DIFF_METAINFO); |
568 | const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN); | |
ce436973 | 569 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); |
6973dcae | 570 | |
34a5e1a2 JS |
571 | *(ecbdata->found_changesp) = 1; |
572 | ||
6973dcae | 573 | if (ecbdata->label_path[0]) { |
1a9eb3b9 JH |
574 | const char *name_a_tab, *name_b_tab; |
575 | ||
576 | name_a_tab = strchr(ecbdata->label_path[0], ' ') ? "\t" : ""; | |
577 | name_b_tab = strchr(ecbdata->label_path[1], ' ') ? "\t" : ""; | |
578 | ||
c0c77734 DB |
579 | fprintf(ecbdata->file, "%s--- %s%s%s\n", |
580 | meta, ecbdata->label_path[0], reset, name_a_tab); | |
581 | fprintf(ecbdata->file, "%s+++ %s%s%s\n", | |
582 | meta, ecbdata->label_path[1], reset, name_b_tab); | |
6973dcae JH |
583 | ecbdata->label_path[0] = ecbdata->label_path[1] = NULL; |
584 | } | |
cd112cef JS |
585 | |
586 | /* This is not really necessary for now because | |
587 | * this codepath only deals with two-way diffs. | |
588 | */ | |
589 | for (i = 0; i < len && line[i] == '@'; i++) | |
590 | ; | |
591 | if (2 <= i && i < len && line[i] == ' ') { | |
592 | ecbdata->nparents = i - 1; | |
23707811 | 593 | len = sane_truncate_line(ecbdata, line, len); |
c0c77734 DB |
594 | emit_line(ecbdata->file, |
595 | diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO), | |
448c3ef1 | 596 | reset, line, len); |
23707811 | 597 | if (line[len-1] != '\n') |
c0c77734 | 598 | putc('\n', ecbdata->file); |
448c3ef1 | 599 | return; |
cd112cef | 600 | } |
448c3ef1 JH |
601 | |
602 | if (len < ecbdata->nparents) { | |
c0c77734 | 603 | emit_line(ecbdata->file, reset, reset, line, len); |
448c3ef1 | 604 | return; |
cd112cef | 605 | } |
448c3ef1 JH |
606 | |
607 | color = DIFF_PLAIN; | |
608 | if (ecbdata->diff_words && ecbdata->nparents != 1) | |
609 | /* fall back to normal diff */ | |
610 | free_diff_words_data(ecbdata); | |
611 | if (ecbdata->diff_words) { | |
612 | if (line[0] == '-') { | |
613 | diff_words_append(line, len, | |
614 | &ecbdata->diff_words->minus); | |
615 | return; | |
616 | } else if (line[0] == '+') { | |
617 | diff_words_append(line, len, | |
618 | &ecbdata->diff_words->plus); | |
619 | return; | |
620 | } | |
621 | if (ecbdata->diff_words->minus.text.size || | |
622 | ecbdata->diff_words->plus.text.size) | |
623 | diff_words_show(ecbdata->diff_words); | |
624 | line++; | |
50f575fc | 625 | len--; |
c0c77734 | 626 | emit_line(ecbdata->file, plain, reset, line, len); |
448c3ef1 JH |
627 | return; |
628 | } | |
629 | for (i = 0; i < ecbdata->nparents && len; i++) { | |
630 | if (line[i] == '-') | |
631 | color = DIFF_FILE_OLD; | |
632 | else if (line[i] == '+') | |
633 | color = DIFF_FILE_NEW; | |
634 | } | |
635 | ||
636 | if (color != DIFF_FILE_NEW) { | |
c0c77734 DB |
637 | emit_line(ecbdata->file, |
638 | diff_get_color(ecbdata->color_diff, color), | |
448c3ef1 JH |
639 | reset, line, len); |
640 | return; | |
641 | } | |
642 | emit_add_line(reset, ecbdata, line, len); | |
6973dcae JH |
643 | } |
644 | ||
645 | static char *pprint_rename(const char *a, const char *b) | |
646 | { | |
647 | const char *old = a; | |
648 | const char *new = b; | |
663af342 | 649 | struct strbuf name; |
6973dcae JH |
650 | int pfx_length, sfx_length; |
651 | int len_a = strlen(a); | |
652 | int len_b = strlen(b); | |
663af342 | 653 | int a_midlen, b_midlen; |
e5bfbf9b AJ |
654 | int qlen_a = quote_c_style(a, NULL, NULL, 0); |
655 | int qlen_b = quote_c_style(b, NULL, NULL, 0); | |
656 | ||
663af342 | 657 | strbuf_init(&name, 0); |
e5bfbf9b | 658 | if (qlen_a || qlen_b) { |
663af342 PH |
659 | quote_c_style(a, &name, NULL, 0); |
660 | strbuf_addstr(&name, " => "); | |
661 | quote_c_style(b, &name, NULL, 0); | |
b315c5c0 | 662 | return strbuf_detach(&name, NULL); |
e5bfbf9b | 663 | } |
6973dcae JH |
664 | |
665 | /* Find common prefix */ | |
666 | pfx_length = 0; | |
667 | while (*old && *new && *old == *new) { | |
668 | if (*old == '/') | |
669 | pfx_length = old - a + 1; | |
670 | old++; | |
671 | new++; | |
672 | } | |
673 | ||
674 | /* Find common suffix */ | |
675 | old = a + len_a; | |
676 | new = b + len_b; | |
677 | sfx_length = 0; | |
678 | while (a <= old && b <= new && *old == *new) { | |
679 | if (*old == '/') | |
680 | sfx_length = len_a - (old - a); | |
681 | old--; | |
682 | new--; | |
683 | } | |
684 | ||
685 | /* | |
686 | * pfx{mid-a => mid-b}sfx | |
687 | * {pfx-a => pfx-b}sfx | |
688 | * pfx{sfx-a => sfx-b} | |
689 | * name-a => name-b | |
690 | */ | |
663af342 PH |
691 | a_midlen = len_a - pfx_length - sfx_length; |
692 | b_midlen = len_b - pfx_length - sfx_length; | |
693 | if (a_midlen < 0) | |
694 | a_midlen = 0; | |
695 | if (b_midlen < 0) | |
696 | b_midlen = 0; | |
697 | ||
698 | strbuf_grow(&name, pfx_length + a_midlen + b_midlen + sfx_length + 7); | |
6973dcae | 699 | if (pfx_length + sfx_length) { |
663af342 PH |
700 | strbuf_add(&name, a, pfx_length); |
701 | strbuf_addch(&name, '{'); | |
6973dcae | 702 | } |
663af342 PH |
703 | strbuf_add(&name, a + pfx_length, a_midlen); |
704 | strbuf_addstr(&name, " => "); | |
705 | strbuf_add(&name, b + pfx_length, b_midlen); | |
706 | if (pfx_length + sfx_length) { | |
707 | strbuf_addch(&name, '}'); | |
708 | strbuf_add(&name, a + len_a - sfx_length, sfx_length); | |
6973dcae | 709 | } |
b315c5c0 | 710 | return strbuf_detach(&name, NULL); |
6973dcae JH |
711 | } |
712 | ||
713 | struct diffstat_t { | |
714 | struct xdiff_emit_state xm; | |
715 | ||
716 | int nr; | |
717 | int alloc; | |
718 | struct diffstat_file { | |
f604652e | 719 | char *from_name; |
6973dcae | 720 | char *name; |
f604652e | 721 | char *print_name; |
6973dcae JH |
722 | unsigned is_unmerged:1; |
723 | unsigned is_binary:1; | |
724 | unsigned is_renamed:1; | |
725 | unsigned int added, deleted; | |
726 | } **files; | |
727 | }; | |
728 | ||
729 | static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat, | |
730 | const char *name_a, | |
731 | const char *name_b) | |
732 | { | |
733 | struct diffstat_file *x; | |
734 | x = xcalloc(sizeof (*x), 1); | |
735 | if (diffstat->nr == diffstat->alloc) { | |
736 | diffstat->alloc = alloc_nr(diffstat->alloc); | |
737 | diffstat->files = xrealloc(diffstat->files, | |
738 | diffstat->alloc * sizeof(x)); | |
739 | } | |
740 | diffstat->files[diffstat->nr++] = x; | |
741 | if (name_b) { | |
f604652e JH |
742 | x->from_name = xstrdup(name_a); |
743 | x->name = xstrdup(name_b); | |
6973dcae JH |
744 | x->is_renamed = 1; |
745 | } | |
f604652e JH |
746 | else { |
747 | x->from_name = NULL; | |
9befac47 | 748 | x->name = xstrdup(name_a); |
f604652e | 749 | } |
6973dcae JH |
750 | return x; |
751 | } | |
752 | ||
753 | static void diffstat_consume(void *priv, char *line, unsigned long len) | |
754 | { | |
755 | struct diffstat_t *diffstat = priv; | |
756 | struct diffstat_file *x = diffstat->files[diffstat->nr - 1]; | |
757 | ||
758 | if (line[0] == '+') | |
759 | x->added++; | |
760 | else if (line[0] == '-') | |
761 | x->deleted++; | |
762 | } | |
763 | ||
698ce6f8 | 764 | const char mime_boundary_leader[] = "------------"; |
6973dcae | 765 | |
a2540023 JH |
766 | static int scale_linear(int it, int width, int max_change) |
767 | { | |
768 | /* | |
3ed74e60 JS |
769 | * make sure that at least one '-' is printed if there were deletions, |
770 | * and likewise for '+'. | |
a2540023 | 771 | */ |
3ed74e60 JS |
772 | if (max_change < 2) |
773 | return it; | |
774 | return ((it - 1) * (width - 1) + max_change - 1) / (max_change - 1); | |
a2540023 JH |
775 | } |
776 | ||
c0c77734 DB |
777 | static void show_name(FILE *file, |
778 | const char *prefix, const char *name, int len, | |
785f7432 | 779 | const char *reset, const char *set) |
a2540023 | 780 | { |
c0c77734 | 781 | fprintf(file, " %s%s%-*s%s |", set, prefix, len, name, reset); |
a2540023 JH |
782 | } |
783 | ||
c0c77734 | 784 | static void show_graph(FILE *file, char ch, int cnt, const char *set, const char *reset) |
a2540023 JH |
785 | { |
786 | if (cnt <= 0) | |
787 | return; | |
c0c77734 | 788 | fprintf(file, "%s", set); |
a2540023 | 789 | while (cnt--) |
c0c77734 DB |
790 | putc(ch, file); |
791 | fprintf(file, "%s", reset); | |
a2540023 JH |
792 | } |
793 | ||
f604652e JH |
794 | static void fill_print_name(struct diffstat_file *file) |
795 | { | |
796 | char *pname; | |
797 | ||
798 | if (file->print_name) | |
799 | return; | |
800 | ||
801 | if (!file->is_renamed) { | |
802 | struct strbuf buf; | |
803 | strbuf_init(&buf, 0); | |
804 | if (quote_c_style(file->name, &buf, NULL, 0)) { | |
805 | pname = strbuf_detach(&buf, NULL); | |
806 | } else { | |
807 | pname = file->name; | |
808 | strbuf_release(&buf); | |
809 | } | |
810 | } else { | |
811 | pname = pprint_rename(file->from_name, file->name); | |
812 | } | |
813 | file->print_name = pname; | |
814 | } | |
815 | ||
a2540023 | 816 | static void show_stats(struct diffstat_t* data, struct diff_options *options) |
6973dcae | 817 | { |
6973dcae | 818 | int i, len, add, del, total, adds = 0, dels = 0; |
a2540023 | 819 | int max_change = 0, max_len = 0; |
6973dcae | 820 | int total_files = data->nr; |
a2540023 | 821 | int width, name_width; |
785f7432 | 822 | const char *reset, *set, *add_c, *del_c; |
6973dcae JH |
823 | |
824 | if (data->nr == 0) | |
825 | return; | |
826 | ||
a2540023 JH |
827 | width = options->stat_width ? options->stat_width : 80; |
828 | name_width = options->stat_name_width ? options->stat_name_width : 50; | |
829 | ||
830 | /* Sanity: give at least 5 columns to the graph, | |
831 | * but leave at least 10 columns for the name. | |
832 | */ | |
833 | if (width < name_width + 15) { | |
834 | if (name_width <= 25) | |
835 | width = name_width + 15; | |
836 | else | |
837 | name_width = width - 15; | |
838 | } | |
839 | ||
840 | /* Find the longest filename and max number of changes */ | |
8f67f8ae PH |
841 | reset = diff_get_color_opt(options, DIFF_RESET); |
842 | set = diff_get_color_opt(options, DIFF_PLAIN); | |
843 | add_c = diff_get_color_opt(options, DIFF_FILE_NEW); | |
844 | del_c = diff_get_color_opt(options, DIFF_FILE_OLD); | |
785f7432 | 845 | |
6973dcae JH |
846 | for (i = 0; i < data->nr; i++) { |
847 | struct diffstat_file *file = data->files[i]; | |
a2540023 | 848 | int change = file->added + file->deleted; |
f604652e JH |
849 | fill_print_name(file); |
850 | len = strlen(file->print_name); | |
6973dcae JH |
851 | if (max_len < len) |
852 | max_len = len; | |
853 | ||
854 | if (file->is_binary || file->is_unmerged) | |
855 | continue; | |
a2540023 JH |
856 | if (max_change < change) |
857 | max_change = change; | |
6973dcae JH |
858 | } |
859 | ||
a2540023 JH |
860 | /* Compute the width of the graph part; |
861 | * 10 is for one blank at the beginning of the line plus | |
862 | * " | count " between the name and the graph. | |
863 | * | |
864 | * From here on, name_width is the width of the name area, | |
865 | * and width is the width of the graph area. | |
866 | */ | |
867 | name_width = (name_width < max_len) ? name_width : max_len; | |
868 | if (width < (name_width + 10) + max_change) | |
869 | width = width - (name_width + 10); | |
870 | else | |
871 | width = max_change; | |
872 | ||
6973dcae | 873 | for (i = 0; i < data->nr; i++) { |
d2543b8e | 874 | const char *prefix = ""; |
f604652e | 875 | char *name = data->files[i]->print_name; |
6973dcae JH |
876 | int added = data->files[i]->added; |
877 | int deleted = data->files[i]->deleted; | |
a2540023 | 878 | int name_len; |
6973dcae JH |
879 | |
880 | /* | |
881 | * "scale" the filename | |
882 | */ | |
a2540023 JH |
883 | len = name_width; |
884 | name_len = strlen(name); | |
885 | if (name_width < name_len) { | |
6973dcae JH |
886 | char *slash; |
887 | prefix = "..."; | |
a2540023 JH |
888 | len -= 3; |
889 | name += name_len - len; | |
6973dcae JH |
890 | slash = strchr(name, '/'); |
891 | if (slash) | |
892 | name = slash; | |
893 | } | |
6973dcae JH |
894 | |
895 | if (data->files[i]->is_binary) { | |
c0c77734 DB |
896 | show_name(options->file, prefix, name, len, reset, set); |
897 | fprintf(options->file, " Bin "); | |
898 | fprintf(options->file, "%s%d%s", del_c, deleted, reset); | |
899 | fprintf(options->file, " -> "); | |
900 | fprintf(options->file, "%s%d%s", add_c, added, reset); | |
901 | fprintf(options->file, " bytes"); | |
902 | fprintf(options->file, "\n"); | |
f604652e | 903 | continue; |
6973dcae JH |
904 | } |
905 | else if (data->files[i]->is_unmerged) { | |
c0c77734 DB |
906 | show_name(options->file, prefix, name, len, reset, set); |
907 | fprintf(options->file, " Unmerged\n"); | |
f604652e | 908 | continue; |
6973dcae JH |
909 | } |
910 | else if (!data->files[i]->is_renamed && | |
911 | (added + deleted == 0)) { | |
912 | total_files--; | |
f604652e | 913 | continue; |
6973dcae JH |
914 | } |
915 | ||
a2540023 JH |
916 | /* |
917 | * scale the add/delete | |
918 | */ | |
6973dcae JH |
919 | add = added; |
920 | del = deleted; | |
921 | total = add + del; | |
922 | adds += add; | |
923 | dels += del; | |
924 | ||
a2540023 | 925 | if (width <= max_change) { |
a2540023 | 926 | add = scale_linear(add, width, max_change); |
3ed74e60 JS |
927 | del = scale_linear(del, width, max_change); |
928 | total = add + del; | |
6973dcae | 929 | } |
c0c77734 | 930 | show_name(options->file, prefix, name, len, reset, set); |
4d9b5359 JK |
931 | fprintf(options->file, "%5d%s", added + deleted, |
932 | added + deleted ? " " : ""); | |
c0c77734 DB |
933 | show_graph(options->file, '+', add, add_c, reset); |
934 | show_graph(options->file, '-', del, del_c, reset); | |
935 | fprintf(options->file, "\n"); | |
936 | } | |
937 | fprintf(options->file, | |
938 | "%s %d files changed, %d insertions(+), %d deletions(-)%s\n", | |
785f7432 | 939 | set, total_files, adds, dels, reset); |
6973dcae JH |
940 | } |
941 | ||
c0c77734 | 942 | static void show_shortstats(struct diffstat_t* data, struct diff_options *options) |
ebd124c6 NP |
943 | { |
944 | int i, adds = 0, dels = 0, total_files = data->nr; | |
945 | ||
946 | if (data->nr == 0) | |
947 | return; | |
948 | ||
949 | for (i = 0; i < data->nr; i++) { | |
950 | if (!data->files[i]->is_binary && | |
951 | !data->files[i]->is_unmerged) { | |
952 | int added = data->files[i]->added; | |
953 | int deleted= data->files[i]->deleted; | |
954 | if (!data->files[i]->is_renamed && | |
955 | (added + deleted == 0)) { | |
956 | total_files--; | |
957 | } else { | |
958 | adds += added; | |
959 | dels += deleted; | |
960 | } | |
961 | } | |
ebd124c6 | 962 | } |
c0c77734 | 963 | fprintf(options->file, " %d files changed, %d insertions(+), %d deletions(-)\n", |
ebd124c6 NP |
964 | total_files, adds, dels); |
965 | } | |
966 | ||
74e2abe5 JH |
967 | static void show_numstat(struct diffstat_t* data, struct diff_options *options) |
968 | { | |
969 | int i; | |
970 | ||
f604652e JH |
971 | if (data->nr == 0) |
972 | return; | |
973 | ||
74e2abe5 JH |
974 | for (i = 0; i < data->nr; i++) { |
975 | struct diffstat_file *file = data->files[i]; | |
976 | ||
bfddbc5e | 977 | if (file->is_binary) |
c0c77734 | 978 | fprintf(options->file, "-\t-\t"); |
bfddbc5e | 979 | else |
c0c77734 DB |
980 | fprintf(options->file, |
981 | "%d\t%d\t", file->added, file->deleted); | |
f604652e JH |
982 | if (options->line_termination) { |
983 | fill_print_name(file); | |
984 | if (!file->is_renamed) | |
c0c77734 | 985 | write_name_quoted(file->name, options->file, |
f604652e JH |
986 | options->line_termination); |
987 | else { | |
c0c77734 DB |
988 | fputs(file->print_name, options->file); |
989 | putc(options->line_termination, options->file); | |
f604652e | 990 | } |
663af342 | 991 | } else { |
f604652e | 992 | if (file->is_renamed) { |
c0c77734 DB |
993 | putc('\0', options->file); |
994 | write_name_quoted(file->from_name, options->file, '\0'); | |
f604652e | 995 | } |
c0c77734 | 996 | write_name_quoted(file->name, options->file, '\0'); |
663af342 | 997 | } |
74e2abe5 JH |
998 | } |
999 | } | |
1000 | ||
c04a7155 JH |
1001 | struct dirstat_file { |
1002 | const char *name; | |
1003 | unsigned long changed; | |
7df7c019 LT |
1004 | }; |
1005 | ||
c04a7155 JH |
1006 | struct dirstat_dir { |
1007 | struct dirstat_file *files; | |
1008 | int alloc, nr, percent, cumulative; | |
1009 | }; | |
1010 | ||
1011 | static long gather_dirstat(FILE *file, struct dirstat_dir *dir, unsigned long changed, const char *base, int baselen) | |
7df7c019 LT |
1012 | { |
1013 | unsigned long this_dir = 0; | |
1014 | unsigned int sources = 0; | |
1015 | ||
1016 | while (dir->nr) { | |
c04a7155 | 1017 | struct dirstat_file *f = dir->files; |
7df7c019 LT |
1018 | int namelen = strlen(f->name); |
1019 | unsigned long this; | |
1020 | char *slash; | |
1021 | ||
1022 | if (namelen < baselen) | |
1023 | break; | |
1024 | if (memcmp(f->name, base, baselen)) | |
1025 | break; | |
1026 | slash = strchr(f->name + baselen, '/'); | |
1027 | if (slash) { | |
1028 | int newbaselen = slash + 1 - f->name; | |
c0c77734 | 1029 | this = gather_dirstat(file, dir, changed, f->name, newbaselen); |
7df7c019 LT |
1030 | sources++; |
1031 | } else { | |
c04a7155 | 1032 | this = f->changed; |
7df7c019 LT |
1033 | dir->files++; |
1034 | dir->nr--; | |
1035 | sources += 2; | |
1036 | } | |
1037 | this_dir += this; | |
1038 | } | |
1039 | ||
1040 | /* | |
1041 | * We don't report dirstat's for | |
1042 | * - the top level | |
1043 | * - or cases where everything came from a single directory | |
1044 | * under this directory (sources == 1). | |
1045 | */ | |
1046 | if (baselen && sources != 1) { | |
1047 | int permille = this_dir * 1000 / changed; | |
1048 | if (permille) { | |
1049 | int percent = permille / 10; | |
1050 | if (percent >= dir->percent) { | |
c0c77734 | 1051 | fprintf(file, "%4d.%01d%% %.*s\n", percent, permille % 10, baselen, base); |
7df7c019 LT |
1052 | if (!dir->cumulative) |
1053 | return 0; | |
1054 | } | |
1055 | } | |
1056 | } | |
1057 | return this_dir; | |
1058 | } | |
1059 | ||
c04a7155 | 1060 | static void show_dirstat(struct diff_options *options) |
7df7c019 LT |
1061 | { |
1062 | int i; | |
1063 | unsigned long changed; | |
c04a7155 JH |
1064 | struct dirstat_dir dir; |
1065 | struct diff_queue_struct *q = &diff_queued_diff; | |
1066 | ||
1067 | dir.files = NULL; | |
1068 | dir.alloc = 0; | |
1069 | dir.nr = 0; | |
1070 | dir.percent = options->dirstat_percent; | |
1071 | dir.cumulative = options->output_format & DIFF_FORMAT_CUMULATIVE; | |
7df7c019 | 1072 | |
7df7c019 | 1073 | changed = 0; |
c04a7155 JH |
1074 | for (i = 0; i < q->nr; i++) { |
1075 | struct diff_filepair *p = q->queue[i]; | |
1076 | const char *name; | |
1077 | unsigned long copied, added, damage; | |
1078 | ||
1079 | name = p->one->path ? p->one->path : p->two->path; | |
1080 | ||
1081 | if (DIFF_FILE_VALID(p->one) && DIFF_FILE_VALID(p->two)) { | |
1082 | diff_populate_filespec(p->one, 0); | |
1083 | diff_populate_filespec(p->two, 0); | |
1084 | diffcore_count_changes(p->one, p->two, NULL, NULL, 0, | |
1085 | &copied, &added); | |
1086 | diff_free_filespec_data(p->one); | |
1087 | diff_free_filespec_data(p->two); | |
1088 | } else if (DIFF_FILE_VALID(p->one)) { | |
1089 | diff_populate_filespec(p->one, 1); | |
1090 | copied = added = 0; | |
1091 | diff_free_filespec_data(p->one); | |
1092 | } else if (DIFF_FILE_VALID(p->two)) { | |
1093 | diff_populate_filespec(p->two, 1); | |
1094 | copied = 0; | |
1095 | added = p->two->size; | |
1096 | diff_free_filespec_data(p->two); | |
1097 | } else | |
2b0b551d | 1098 | continue; |
c04a7155 JH |
1099 | |
1100 | /* | |
1101 | * Original minus copied is the removed material, | |
1102 | * added is the new material. They are both damages | |
1103 | * made to the preimage. | |
1104 | */ | |
1105 | damage = (p->one->size - copied) + added; | |
1106 | ||
1107 | ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); | |
1108 | dir.files[dir.nr].name = name; | |
1109 | dir.files[dir.nr].changed = damage; | |
1110 | changed += damage; | |
1111 | dir.nr++; | |
7df7c019 LT |
1112 | } |
1113 | ||
1114 | /* This can happen even with many files, if everything was renames */ | |
1115 | if (!changed) | |
1116 | return; | |
1117 | ||
1118 | /* Show all directories with more than x% of the changes */ | |
c0c77734 | 1119 | gather_dirstat(options->file, &dir, changed, "", 0); |
7df7c019 LT |
1120 | } |
1121 | ||
f604652e JH |
1122 | static void free_diffstat_info(struct diffstat_t *diffstat) |
1123 | { | |
1124 | int i; | |
1125 | for (i = 0; i < diffstat->nr; i++) { | |
1126 | struct diffstat_file *f = diffstat->files[i]; | |
1127 | if (f->name != f->print_name) | |
1128 | free(f->print_name); | |
1129 | free(f->name); | |
1130 | free(f->from_name); | |
1131 | free(f); | |
1132 | } | |
1133 | free(diffstat->files); | |
1134 | } | |
1135 | ||
88246898 JS |
1136 | struct checkdiff_t { |
1137 | struct xdiff_emit_state xm; | |
1138 | const char *filename; | |
c5a8c3ec | 1139 | int lineno, color_diff; |
cf1b7869 | 1140 | unsigned ws_rule; |
62c64895 | 1141 | unsigned status; |
c0c77734 | 1142 | FILE *file; |
88246898 JS |
1143 | }; |
1144 | ||
1145 | static void checkdiff_consume(void *priv, char *line, unsigned long len) | |
1146 | { | |
1147 | struct checkdiff_t *data = priv; | |
c5a8c3ec JS |
1148 | const char *ws = diff_get_color(data->color_diff, DIFF_WHITESPACE); |
1149 | const char *reset = diff_get_color(data->color_diff, DIFF_RESET); | |
1150 | const char *set = diff_get_color(data->color_diff, DIFF_FILE_NEW); | |
c1795bb0 | 1151 | char *err; |
88246898 JS |
1152 | |
1153 | if (line[0] == '+') { | |
18374e58 | 1154 | unsigned bad; |
0ef617f4 | 1155 | data->lineno++; |
8f8841e9 | 1156 | bad = ws_check(line + 1, len - 1, data->ws_rule); |
18374e58 | 1157 | if (!bad) |
c1795bb0 | 1158 | return; |
18374e58 JH |
1159 | data->status |= bad; |
1160 | err = whitespace_error_string(bad); | |
c0c77734 | 1161 | fprintf(data->file, "%s:%d: %s.\n", data->filename, data->lineno, err); |
c1795bb0 | 1162 | free(err); |
c0c77734 | 1163 | emit_line(data->file, set, reset, line, 1); |
8f8841e9 JH |
1164 | ws_check_emit(line + 1, len - 1, data->ws_rule, |
1165 | data->file, set, reset, ws); | |
88246898 JS |
1166 | } else if (line[0] == ' ') |
1167 | data->lineno++; | |
1168 | else if (line[0] == '@') { | |
1169 | char *plus = strchr(line, '+'); | |
1170 | if (plus) | |
0ef617f4 | 1171 | data->lineno = strtol(plus, NULL, 10) - 1; |
88246898 JS |
1172 | else |
1173 | die("invalid diff"); | |
1174 | } | |
1175 | } | |
1176 | ||
0660626c JH |
1177 | static unsigned char *deflate_it(char *data, |
1178 | unsigned long size, | |
1179 | unsigned long *result_size) | |
051308f6 | 1180 | { |
0660626c JH |
1181 | int bound; |
1182 | unsigned char *deflated; | |
1183 | z_stream stream; | |
1184 | ||
1185 | memset(&stream, 0, sizeof(stream)); | |
12f6c308 | 1186 | deflateInit(&stream, zlib_compression_level); |
0660626c JH |
1187 | bound = deflateBound(&stream, size); |
1188 | deflated = xmalloc(bound); | |
1189 | stream.next_out = deflated; | |
1190 | stream.avail_out = bound; | |
1191 | ||
1192 | stream.next_in = (unsigned char *)data; | |
1193 | stream.avail_in = size; | |
1194 | while (deflate(&stream, Z_FINISH) == Z_OK) | |
1195 | ; /* nothing */ | |
1196 | deflateEnd(&stream); | |
1197 | *result_size = stream.total_out; | |
1198 | return deflated; | |
051308f6 JH |
1199 | } |
1200 | ||
c0c77734 | 1201 | static void emit_binary_diff_body(FILE *file, mmfile_t *one, mmfile_t *two) |
051308f6 | 1202 | { |
0660626c JH |
1203 | void *cp; |
1204 | void *delta; | |
1205 | void *deflated; | |
1206 | void *data; | |
1207 | unsigned long orig_size; | |
1208 | unsigned long delta_size; | |
1209 | unsigned long deflate_size; | |
1210 | unsigned long data_size; | |
051308f6 | 1211 | |
0660626c JH |
1212 | /* We could do deflated delta, or we could do just deflated two, |
1213 | * whichever is smaller. | |
051308f6 | 1214 | */ |
0660626c JH |
1215 | delta = NULL; |
1216 | deflated = deflate_it(two->ptr, two->size, &deflate_size); | |
1217 | if (one->size && two->size) { | |
1218 | delta = diff_delta(one->ptr, one->size, | |
1219 | two->ptr, two->size, | |
1220 | &delta_size, deflate_size); | |
1221 | if (delta) { | |
1222 | void *to_free = delta; | |
1223 | orig_size = delta_size; | |
1224 | delta = deflate_it(delta, delta_size, &delta_size); | |
1225 | free(to_free); | |
051308f6 JH |
1226 | } |
1227 | } | |
051308f6 | 1228 | |
0660626c | 1229 | if (delta && delta_size < deflate_size) { |
c0c77734 | 1230 | fprintf(file, "delta %lu\n", orig_size); |
0660626c JH |
1231 | free(deflated); |
1232 | data = delta; | |
1233 | data_size = delta_size; | |
1234 | } | |
1235 | else { | |
c0c77734 | 1236 | fprintf(file, "literal %lu\n", two->size); |
0660626c JH |
1237 | free(delta); |
1238 | data = deflated; | |
1239 | data_size = deflate_size; | |
1240 | } | |
051308f6 | 1241 | |
0660626c JH |
1242 | /* emit data encoded in base85 */ |
1243 | cp = data; | |
1244 | while (data_size) { | |
1245 | int bytes = (52 < data_size) ? 52 : data_size; | |
051308f6 | 1246 | char line[70]; |
0660626c | 1247 | data_size -= bytes; |
051308f6 JH |
1248 | if (bytes <= 26) |
1249 | line[0] = bytes + 'A' - 1; | |
1250 | else | |
1251 | line[0] = bytes - 26 + 'a' - 1; | |
1252 | encode_85(line + 1, cp, bytes); | |
1d7f171c | 1253 | cp = (char *) cp + bytes; |
c0c77734 DB |
1254 | fputs(line, file); |
1255 | fputc('\n', file); | |
051308f6 | 1256 | } |
c0c77734 | 1257 | fprintf(file, "\n"); |
0660626c | 1258 | free(data); |
051308f6 JH |
1259 | } |
1260 | ||
c0c77734 | 1261 | static void emit_binary_diff(FILE *file, mmfile_t *one, mmfile_t *two) |
d4c452f0 | 1262 | { |
c0c77734 DB |
1263 | fprintf(file, "GIT binary patch\n"); |
1264 | emit_binary_diff_body(file, one, two); | |
1265 | emit_binary_diff_body(file, two, one); | |
d4c452f0 JH |
1266 | } |
1267 | ||
8c701249 JH |
1268 | static void setup_diff_attr_check(struct git_attr_check *check) |
1269 | { | |
1270 | static struct git_attr *attr_diff; | |
1271 | ||
29a3eefd | 1272 | if (!attr_diff) { |
8c701249 | 1273 | attr_diff = git_attr("diff", 4); |
29a3eefd JH |
1274 | } |
1275 | check[0].attr = attr_diff; | |
8c701249 JH |
1276 | } |
1277 | ||
29a3eefd | 1278 | static void diff_filespec_check_attr(struct diff_filespec *one) |
6973dcae | 1279 | { |
e0e324a4 | 1280 | struct git_attr_check attr_diff_check; |
2c3fa66f | 1281 | int check_from_data = 0; |
8c701249 | 1282 | |
29a3eefd JH |
1283 | if (one->checked_attr) |
1284 | return; | |
1285 | ||
e0e324a4 | 1286 | setup_diff_attr_check(&attr_diff_check); |
29a3eefd | 1287 | one->is_binary = 0; |
e0e324a4 | 1288 | one->funcname_pattern_ident = NULL; |
29a3eefd | 1289 | |
e0e324a4 | 1290 | if (!git_checkattr(one->path, 1, &attr_diff_check)) { |
29a3eefd JH |
1291 | const char *value; |
1292 | ||
1293 | /* binaryness */ | |
e0e324a4 | 1294 | value = attr_diff_check.value; |
515106fa | 1295 | if (ATTR_TRUE(value)) |
29a3eefd | 1296 | ; |
515106fa | 1297 | else if (ATTR_FALSE(value)) |
29a3eefd | 1298 | one->is_binary = 1; |
2c3fa66f JH |
1299 | else |
1300 | check_from_data = 1; | |
f258475a | 1301 | |
e0e324a4 | 1302 | /* funcname pattern ident */ |
f258475a JH |
1303 | if (ATTR_TRUE(value) || ATTR_FALSE(value) || ATTR_UNSET(value)) |
1304 | ; | |
1305 | else | |
e0e324a4 | 1306 | one->funcname_pattern_ident = value; |
515106fa | 1307 | } |
40250af4 | 1308 | |
2c3fa66f JH |
1309 | if (check_from_data) { |
1310 | if (!one->data && DIFF_FILE_VALID(one)) | |
1311 | diff_populate_filespec(one, 0); | |
29a3eefd | 1312 | |
2c3fa66f JH |
1313 | if (one->data) |
1314 | one->is_binary = buffer_is_binary(one->data, one->size); | |
1315 | } | |
29a3eefd JH |
1316 | } |
1317 | ||
1318 | int diff_filespec_is_binary(struct diff_filespec *one) | |
1319 | { | |
1320 | diff_filespec_check_attr(one); | |
1321 | return one->is_binary; | |
6973dcae JH |
1322 | } |
1323 | ||
e0e324a4 | 1324 | static const char *funcname_pattern(const char *ident) |
f258475a | 1325 | { |
e0e324a4 | 1326 | struct funcname_pattern *pp; |
f258475a | 1327 | |
e0e324a4 JH |
1328 | for (pp = funcname_pattern_list; pp; pp = pp->next) |
1329 | if (!strcmp(ident, pp->name)) | |
1330 | return pp->pattern; | |
f258475a JH |
1331 | return NULL; |
1332 | } | |
1333 | ||
d3a93dc9 JH |
1334 | static struct builtin_funcname_pattern { |
1335 | const char *name; | |
1336 | const char *pattern; | |
1337 | } builtin_funcname_pattern[] = { | |
1338 | { "java", "!^[ ]*\\(catch\\|do\\|for\\|if\\|instanceof\\|" | |
1339 | "new\\|return\\|switch\\|throw\\|while\\)\n" | |
1340 | "^[ ]*\\(\\([ ]*" | |
1341 | "[A-Za-z_][A-Za-z_0-9]*\\)\\{2,\\}" | |
14a5c7c1 | 1342 | "[ ]*([^;]*\\)$" }, |
d3a93dc9 JH |
1343 | { "tex", "^\\(\\\\\\(sub\\)*section{.*\\)$" }, |
1344 | }; | |
1345 | ||
e0e324a4 | 1346 | static const char *diff_funcname_pattern(struct diff_filespec *one) |
f258475a | 1347 | { |
e0e324a4 | 1348 | const char *ident, *pattern; |
d3a93dc9 | 1349 | int i; |
f258475a JH |
1350 | |
1351 | diff_filespec_check_attr(one); | |
e0e324a4 | 1352 | ident = one->funcname_pattern_ident; |
f258475a JH |
1353 | |
1354 | if (!ident) | |
1355 | /* | |
1356 | * If the config file has "funcname.default" defined, that | |
1357 | * regexp is used; otherwise NULL is returned and xemit uses | |
1358 | * the built-in default. | |
1359 | */ | |
e0e324a4 | 1360 | return funcname_pattern("default"); |
f258475a JH |
1361 | |
1362 | /* Look up custom "funcname.$ident" regexp from config. */ | |
e0e324a4 JH |
1363 | pattern = funcname_pattern(ident); |
1364 | if (pattern) | |
1365 | return pattern; | |
f258475a JH |
1366 | |
1367 | /* | |
1368 | * And define built-in fallback patterns here. Note that | |
9f6fe822 | 1369 | * these can be overridden by the user's config settings. |
f258475a | 1370 | */ |
d3a93dc9 JH |
1371 | for (i = 0; i < ARRAY_SIZE(builtin_funcname_pattern); i++) |
1372 | if (!strcmp(ident, builtin_funcname_pattern[i].name)) | |
1373 | return builtin_funcname_pattern[i].pattern; | |
f258475a JH |
1374 | |
1375 | return NULL; | |
1376 | } | |
1377 | ||
6973dcae JH |
1378 | static void builtin_diff(const char *name_a, |
1379 | const char *name_b, | |
1380 | struct diff_filespec *one, | |
1381 | struct diff_filespec *two, | |
1382 | const char *xfrm_msg, | |
051308f6 | 1383 | struct diff_options *o, |
6973dcae JH |
1384 | int complete_rewrite) |
1385 | { | |
1386 | mmfile_t mf1, mf2; | |
1387 | const char *lbl[2]; | |
1388 | char *a_one, *b_two; | |
8f67f8ae PH |
1389 | const char *set = diff_get_color_opt(o, DIFF_METAINFO); |
1390 | const char *reset = diff_get_color_opt(o, DIFF_RESET); | |
6973dcae | 1391 | |
eab9a40b JS |
1392 | a_one = quote_two(o->a_prefix, name_a + (*name_a == '/')); |
1393 | b_two = quote_two(o->b_prefix, name_b + (*name_b == '/')); | |
6973dcae JH |
1394 | lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null"; |
1395 | lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null"; | |
c0c77734 | 1396 | fprintf(o->file, "%sdiff --git %s %s%s\n", set, a_one, b_two, reset); |
6973dcae JH |
1397 | if (lbl[0][0] == '/') { |
1398 | /* /dev/null */ | |
c0c77734 | 1399 | fprintf(o->file, "%snew file mode %06o%s\n", set, two->mode, reset); |
50f575fc | 1400 | if (xfrm_msg && xfrm_msg[0]) |
c0c77734 | 1401 | fprintf(o->file, "%s%s%s\n", set, xfrm_msg, reset); |
6973dcae JH |
1402 | } |
1403 | else if (lbl[1][0] == '/') { | |
c0c77734 | 1404 | fprintf(o->file, "%sdeleted file mode %06o%s\n", set, one->mode, reset); |
50f575fc | 1405 | if (xfrm_msg && xfrm_msg[0]) |
c0c77734 | 1406 | fprintf(o->file, "%s%s%s\n", set, xfrm_msg, reset); |
6973dcae JH |
1407 | } |
1408 | else { | |
1409 | if (one->mode != two->mode) { | |
c0c77734 DB |
1410 | fprintf(o->file, "%sold mode %06o%s\n", set, one->mode, reset); |
1411 | fprintf(o->file, "%snew mode %06o%s\n", set, two->mode, reset); | |
cd112cef | 1412 | } |
50f575fc | 1413 | if (xfrm_msg && xfrm_msg[0]) |
c0c77734 | 1414 | fprintf(o->file, "%s%s%s\n", set, xfrm_msg, reset); |
6973dcae JH |
1415 | /* |
1416 | * we do not run diff between different kind | |
1417 | * of objects. | |
1418 | */ | |
1419 | if ((one->mode ^ two->mode) & S_IFMT) | |
1420 | goto free_ab_and_return; | |
1421 | if (complete_rewrite) { | |
eab9a40b | 1422 | emit_rewrite_diff(name_a, name_b, one, two, o); |
34a5e1a2 | 1423 | o->found_changes = 1; |
6973dcae JH |
1424 | goto free_ab_and_return; |
1425 | } | |
1426 | } | |
1427 | ||
1428 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
1429 | die("unable to read files to diff"); | |
1430 | ||
8f67f8ae | 1431 | if (!DIFF_OPT_TST(o, TEXT) && |
29a3eefd | 1432 | (diff_filespec_is_binary(one) || diff_filespec_is_binary(two))) { |
0660626c JH |
1433 | /* Quite common confusing case */ |
1434 | if (mf1.size == mf2.size && | |
1435 | !memcmp(mf1.ptr, mf2.ptr, mf1.size)) | |
1436 | goto free_ab_and_return; | |
8f67f8ae | 1437 | if (DIFF_OPT_TST(o, BINARY)) |
c0c77734 | 1438 | emit_binary_diff(o->file, &mf1, &mf2); |
051308f6 | 1439 | else |
c0c77734 DB |
1440 | fprintf(o->file, "Binary files %s and %s differ\n", |
1441 | lbl[0], lbl[1]); | |
34a5e1a2 | 1442 | o->found_changes = 1; |
051308f6 | 1443 | } |
6973dcae JH |
1444 | else { |
1445 | /* Crazy xdl interfaces.. */ | |
1446 | const char *diffopts = getenv("GIT_DIFF_OPTS"); | |
1447 | xpparam_t xpp; | |
1448 | xdemitconf_t xecfg; | |
1449 | xdemitcb_t ecb; | |
1450 | struct emit_callback ecbdata; | |
e0e324a4 | 1451 | const char *funcname_pattern; |
f258475a | 1452 | |
e0e324a4 JH |
1453 | funcname_pattern = diff_funcname_pattern(one); |
1454 | if (!funcname_pattern) | |
1455 | funcname_pattern = diff_funcname_pattern(two); | |
6973dcae | 1456 | |
30b25010 | 1457 | memset(&xecfg, 0, sizeof(xecfg)); |
cd112cef | 1458 | memset(&ecbdata, 0, sizeof(ecbdata)); |
6973dcae | 1459 | ecbdata.label_path = lbl; |
8f67f8ae | 1460 | ecbdata.color_diff = DIFF_OPT_TST(o, COLOR_DIFF); |
34a5e1a2 | 1461 | ecbdata.found_changesp = &o->found_changes; |
cf1b7869 | 1462 | ecbdata.ws_rule = whitespace_rule(name_b ? name_b : name_a); |
c0c77734 | 1463 | ecbdata.file = o->file; |
0d21efa5 | 1464 | xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts; |
ee1e5412 | 1465 | xecfg.ctxlen = o->context; |
6973dcae | 1466 | xecfg.flags = XDL_EMIT_FUNCNAMES; |
e0e324a4 JH |
1467 | if (funcname_pattern) |
1468 | xdiff_set_find_func(&xecfg, funcname_pattern); | |
6973dcae JH |
1469 | if (!diffopts) |
1470 | ; | |
cc44c765 | 1471 | else if (!prefixcmp(diffopts, "--unified=")) |
6973dcae | 1472 | xecfg.ctxlen = strtoul(diffopts + 10, NULL, 10); |
cc44c765 | 1473 | else if (!prefixcmp(diffopts, "-u")) |
6973dcae | 1474 | xecfg.ctxlen = strtoul(diffopts + 2, NULL, 10); |
cd112cef | 1475 | ecb.outf = xdiff_outf; |
6973dcae | 1476 | ecb.priv = &ecbdata; |
cd112cef | 1477 | ecbdata.xm.consume = fn_out_consume; |
c0c77734 | 1478 | if (DIFF_OPT_TST(o, COLOR_DIFF_WORDS)) { |
f59a59e2 JS |
1479 | ecbdata.diff_words = |
1480 | xcalloc(1, sizeof(struct diff_words_data)); | |
c0c77734 DB |
1481 | ecbdata.diff_words->file = o->file; |
1482 | } | |
c279d7e9 | 1483 | xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); |
8f67f8ae | 1484 | if (DIFF_OPT_TST(o, COLOR_DIFF_WORDS)) |
f59a59e2 | 1485 | free_diff_words_data(&ecbdata); |
6973dcae JH |
1486 | } |
1487 | ||
1488 | free_ab_and_return: | |
fc3abdf5 JH |
1489 | diff_free_filespec_data(one); |
1490 | diff_free_filespec_data(two); | |
6973dcae JH |
1491 | free(a_one); |
1492 | free(b_two); | |
1493 | return; | |
1494 | } | |
1495 | ||
1496 | static void builtin_diffstat(const char *name_a, const char *name_b, | |
1497 | struct diff_filespec *one, | |
1498 | struct diff_filespec *two, | |
710158e3 | 1499 | struct diffstat_t *diffstat, |
0d21efa5 | 1500 | struct diff_options *o, |
710158e3 | 1501 | int complete_rewrite) |
6973dcae JH |
1502 | { |
1503 | mmfile_t mf1, mf2; | |
1504 | struct diffstat_file *data; | |
1505 | ||
1506 | data = diffstat_add(diffstat, name_a, name_b); | |
1507 | ||
1508 | if (!one || !two) { | |
1509 | data->is_unmerged = 1; | |
1510 | return; | |
1511 | } | |
710158e3 JH |
1512 | if (complete_rewrite) { |
1513 | diff_populate_filespec(one, 0); | |
1514 | diff_populate_filespec(two, 0); | |
1515 | data->deleted = count_lines(one->data, one->size); | |
1516 | data->added = count_lines(two->data, two->size); | |
fc3abdf5 | 1517 | goto free_and_return; |
710158e3 | 1518 | } |
6973dcae JH |
1519 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) |
1520 | die("unable to read files to diff"); | |
1521 | ||
29a3eefd | 1522 | if (diff_filespec_is_binary(one) || diff_filespec_is_binary(two)) { |
6973dcae | 1523 | data->is_binary = 1; |
b1882587 AP |
1524 | data->added = mf2.size; |
1525 | data->deleted = mf1.size; | |
1526 | } else { | |
6973dcae JH |
1527 | /* Crazy xdl interfaces.. */ |
1528 | xpparam_t xpp; | |
1529 | xdemitconf_t xecfg; | |
1530 | xdemitcb_t ecb; | |
1531 | ||
30b25010 | 1532 | memset(&xecfg, 0, sizeof(xecfg)); |
0d21efa5 | 1533 | xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts; |
6973dcae JH |
1534 | ecb.outf = xdiff_outf; |
1535 | ecb.priv = diffstat; | |
c279d7e9 | 1536 | xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); |
6973dcae | 1537 | } |
fc3abdf5 JH |
1538 | |
1539 | free_and_return: | |
1540 | diff_free_filespec_data(one); | |
1541 | diff_free_filespec_data(two); | |
6973dcae JH |
1542 | } |
1543 | ||
88246898 | 1544 | static void builtin_checkdiff(const char *name_a, const char *name_b, |
cd676a51 | 1545 | const char *attr_path, |
5ff10dd6 JH |
1546 | struct diff_filespec *one, |
1547 | struct diff_filespec *two, | |
1548 | struct diff_options *o) | |
88246898 JS |
1549 | { |
1550 | mmfile_t mf1, mf2; | |
1551 | struct checkdiff_t data; | |
1552 | ||
1553 | if (!two) | |
1554 | return; | |
1555 | ||
1556 | memset(&data, 0, sizeof(data)); | |
1557 | data.xm.consume = checkdiff_consume; | |
1558 | data.filename = name_b ? name_b : name_a; | |
1559 | data.lineno = 0; | |
8f67f8ae | 1560 | data.color_diff = DIFF_OPT_TST(o, COLOR_DIFF); |
cd676a51 | 1561 | data.ws_rule = whitespace_rule(attr_path); |
c0c77734 | 1562 | data.file = o->file; |
88246898 JS |
1563 | |
1564 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
1565 | die("unable to read files to diff"); | |
1566 | ||
5ff10dd6 JH |
1567 | /* |
1568 | * All the other codepaths check both sides, but not checking | |
1569 | * the "old" side here is deliberate. We are checking the newly | |
1570 | * introduced changes, and as long as the "new" side is text, we | |
1571 | * can and should check what it introduces. | |
1572 | */ | |
29a3eefd | 1573 | if (diff_filespec_is_binary(two)) |
fc3abdf5 | 1574 | goto free_and_return; |
88246898 JS |
1575 | else { |
1576 | /* Crazy xdl interfaces.. */ | |
1577 | xpparam_t xpp; | |
1578 | xdemitconf_t xecfg; | |
1579 | xdemitcb_t ecb; | |
1580 | ||
30b25010 | 1581 | memset(&xecfg, 0, sizeof(xecfg)); |
88246898 | 1582 | xpp.flags = XDF_NEED_MINIMAL; |
88246898 JS |
1583 | ecb.outf = xdiff_outf; |
1584 | ecb.priv = &data; | |
c279d7e9 | 1585 | xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); |
88246898 | 1586 | } |
fc3abdf5 JH |
1587 | free_and_return: |
1588 | diff_free_filespec_data(one); | |
1589 | diff_free_filespec_data(two); | |
62c64895 WC |
1590 | if (data.status) |
1591 | DIFF_OPT_SET(o, CHECK_FAILED); | |
88246898 JS |
1592 | } |
1593 | ||
6973dcae JH |
1594 | struct diff_filespec *alloc_filespec(const char *path) |
1595 | { | |
1596 | int namelen = strlen(path); | |
1597 | struct diff_filespec *spec = xmalloc(sizeof(*spec) + namelen + 1); | |
1598 | ||
1599 | memset(spec, 0, sizeof(*spec)); | |
1600 | spec->path = (char *)(spec + 1); | |
1601 | memcpy(spec->path, path, namelen+1); | |
9fb88419 | 1602 | spec->count = 1; |
6973dcae JH |
1603 | return spec; |
1604 | } | |
1605 | ||
9fb88419 LT |
1606 | void free_filespec(struct diff_filespec *spec) |
1607 | { | |
1608 | if (!--spec->count) { | |
1609 | diff_free_filespec_data(spec); | |
1610 | free(spec); | |
1611 | } | |
1612 | } | |
1613 | ||
6973dcae JH |
1614 | void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1, |
1615 | unsigned short mode) | |
1616 | { | |
1617 | if (mode) { | |
1618 | spec->mode = canon_mode(mode); | |
e702496e | 1619 | hashcpy(spec->sha1, sha1); |
0bef57ee | 1620 | spec->sha1_valid = !is_null_sha1(sha1); |
6973dcae JH |
1621 | } |
1622 | } | |
1623 | ||
1624 | /* | |
5adf317b | 1625 | * Given a name and sha1 pair, if the index tells us the file in |
6973dcae JH |
1626 | * the work tree has that object contents, return true, so that |
1627 | * prepare_temp_file() does not have to inflate and extract. | |
1628 | */ | |
1510fea7 | 1629 | static int reuse_worktree_file(const char *name, const unsigned char *sha1, int want_file) |
6973dcae JH |
1630 | { |
1631 | struct cache_entry *ce; | |
1632 | struct stat st; | |
1633 | int pos, len; | |
1634 | ||
1635 | /* We do not read the cache ourselves here, because the | |
1636 | * benchmark with my previous version that always reads cache | |
1637 | * shows that it makes things worse for diff-tree comparing | |
1638 | * two linux-2.6 kernel trees in an already checked out work | |
1639 | * tree. This is because most diff-tree comparisons deal with | |
1640 | * only a small number of files, while reading the cache is | |
1641 | * expensive for a large project, and its cost outweighs the | |
1642 | * savings we get by not inflating the object to a temporary | |
1643 | * file. Practically, this code only helps when we are used | |
1644 | * by diff-cache --cached, which does read the cache before | |
1645 | * calling us. | |
1646 | */ | |
1647 | if (!active_cache) | |
1648 | return 0; | |
1649 | ||
1510fea7 SP |
1650 | /* We want to avoid the working directory if our caller |
1651 | * doesn't need the data in a normal file, this system | |
1652 | * is rather slow with its stat/open/mmap/close syscalls, | |
1653 | * and the object is contained in a pack file. The pack | |
1654 | * is probably already open and will be faster to obtain | |
1655 | * the data through than the working directory. Loose | |
1656 | * objects however would tend to be slower as they need | |
1657 | * to be individually opened and inflated. | |
1658 | */ | |
5caf9232 | 1659 | if (!FAST_WORKING_DIRECTORY && !want_file && has_sha1_pack(sha1, NULL)) |
1510fea7 SP |
1660 | return 0; |
1661 | ||
6973dcae JH |
1662 | len = strlen(name); |
1663 | pos = cache_name_pos(name, len); | |
1664 | if (pos < 0) | |
1665 | return 0; | |
1666 | ce = active_cache[pos]; | |
eadb5831 JH |
1667 | |
1668 | /* | |
1669 | * This is not the sha1 we are looking for, or | |
1670 | * unreusable because it is not a regular file. | |
1671 | */ | |
1672 | if (hashcmp(sha1, ce->sha1) || !S_ISREG(ce->ce_mode)) | |
6973dcae | 1673 | return 0; |
eadb5831 JH |
1674 | |
1675 | /* | |
1676 | * If ce matches the file in the work tree, we can reuse it. | |
6973dcae | 1677 | */ |
eadb5831 JH |
1678 | if (ce_uptodate(ce) || |
1679 | (!lstat(name, &st) && !ce_match_stat(ce, &st, 0))) | |
1680 | return 1; | |
1681 | ||
1682 | return 0; | |
6973dcae JH |
1683 | } |
1684 | ||
3afaa72d JH |
1685 | static int populate_from_stdin(struct diff_filespec *s) |
1686 | { | |
af6eb822 | 1687 | struct strbuf buf; |
c32f749f | 1688 | size_t size = 0; |
af6eb822 | 1689 | |
f1696ee3 PH |
1690 | strbuf_init(&buf, 0); |
1691 | if (strbuf_read(&buf, 0, 0) < 0) | |
af6eb822 | 1692 | return error("error while reading from stdin %s", |
3afaa72d | 1693 | strerror(errno)); |
af6eb822 | 1694 | |
3afaa72d | 1695 | s->should_munmap = 0; |
c32f749f RS |
1696 | s->data = strbuf_detach(&buf, &size); |
1697 | s->size = size; | |
3afaa72d JH |
1698 | s->should_free = 1; |
1699 | return 0; | |
1700 | } | |
1701 | ||
04786756 LT |
1702 | static int diff_populate_gitlink(struct diff_filespec *s, int size_only) |
1703 | { | |
1704 | int len; | |
1705 | char *data = xmalloc(100); | |
1706 | len = snprintf(data, 100, | |
1707 | "Subproject commit %s\n", sha1_to_hex(s->sha1)); | |
1708 | s->data = data; | |
1709 | s->size = len; | |
1710 | s->should_free = 1; | |
1711 | if (size_only) { | |
1712 | s->data = NULL; | |
1713 | free(data); | |
1714 | } | |
1715 | return 0; | |
1716 | } | |
1717 | ||
6973dcae JH |
1718 | /* |
1719 | * While doing rename detection and pickaxe operation, we may need to | |
1720 | * grab the data for the blob (or file) for our own in-core comparison. | |
1721 | * diff_filespec has data and size fields for this purpose. | |
1722 | */ | |
1723 | int diff_populate_filespec(struct diff_filespec *s, int size_only) | |
1724 | { | |
1725 | int err = 0; | |
1726 | if (!DIFF_FILE_VALID(s)) | |
1727 | die("internal error: asking to populate invalid file."); | |
1728 | if (S_ISDIR(s->mode)) | |
1729 | return -1; | |
1730 | ||
6973dcae | 1731 | if (s->data) |
fc3abdf5 | 1732 | return 0; |
04786756 | 1733 | |
6e0b8ed6 JH |
1734 | if (size_only && 0 < s->size) |
1735 | return 0; | |
1736 | ||
302b9282 | 1737 | if (S_ISGITLINK(s->mode)) |
04786756 LT |
1738 | return diff_populate_gitlink(s, size_only); |
1739 | ||
6973dcae | 1740 | if (!s->sha1_valid || |
1510fea7 | 1741 | reuse_worktree_file(s->path, s->sha1, 0)) { |
5ecd293d | 1742 | struct strbuf buf; |
6973dcae JH |
1743 | struct stat st; |
1744 | int fd; | |
6c510bee | 1745 | |
3afaa72d JH |
1746 | if (!strcmp(s->path, "-")) |
1747 | return populate_from_stdin(s); | |
1748 | ||
6973dcae JH |
1749 | if (lstat(s->path, &st) < 0) { |
1750 | if (errno == ENOENT) { | |
1751 | err_empty: | |
1752 | err = -1; | |
1753 | empty: | |
d2543b8e | 1754 | s->data = (char *)""; |
6973dcae JH |
1755 | s->size = 0; |
1756 | return err; | |
1757 | } | |
1758 | } | |
dc49cd76 | 1759 | s->size = xsize_t(st.st_size); |
6973dcae JH |
1760 | if (!s->size) |
1761 | goto empty; | |
1762 | if (size_only) | |
1763 | return 0; | |
1764 | if (S_ISLNK(st.st_mode)) { | |
1765 | int ret; | |
1766 | s->data = xmalloc(s->size); | |
1767 | s->should_free = 1; | |
1768 | ret = readlink(s->path, s->data, s->size); | |
1769 | if (ret < 0) { | |
1770 | free(s->data); | |
1771 | goto err_empty; | |
1772 | } | |
1773 | return 0; | |
1774 | } | |
1775 | fd = open(s->path, O_RDONLY); | |
1776 | if (fd < 0) | |
1777 | goto err_empty; | |
c4712e45 | 1778 | s->data = xmmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0); |
6973dcae | 1779 | close(fd); |
6973dcae | 1780 | s->should_munmap = 1; |
6c510bee LT |
1781 | |
1782 | /* | |
1783 | * Convert from working tree format to canonical git format | |
1784 | */ | |
5ecd293d | 1785 | strbuf_init(&buf, 0); |
21e5ad50 | 1786 | if (convert_to_git(s->path, s->data, s->size, &buf, safe_crlf)) { |
c32f749f | 1787 | size_t size = 0; |
6c510bee LT |
1788 | munmap(s->data, s->size); |
1789 | s->should_munmap = 0; | |
c32f749f RS |
1790 | s->data = strbuf_detach(&buf, &size); |
1791 | s->size = size; | |
6c510bee LT |
1792 | s->should_free = 1; |
1793 | } | |
6973dcae JH |
1794 | } |
1795 | else { | |
21666f1a | 1796 | enum object_type type; |
6e0b8ed6 | 1797 | if (size_only) |
21666f1a | 1798 | type = sha1_object_info(s->sha1, &s->size); |
6973dcae | 1799 | else { |
21666f1a | 1800 | s->data = read_sha1_file(s->sha1, &type, &s->size); |
6973dcae JH |
1801 | s->should_free = 1; |
1802 | } | |
1803 | } | |
1804 | return 0; | |
1805 | } | |
1806 | ||
8ae92e63 | 1807 | void diff_free_filespec_blob(struct diff_filespec *s) |
6973dcae JH |
1808 | { |
1809 | if (s->should_free) | |
1810 | free(s->data); | |
1811 | else if (s->should_munmap) | |
1812 | munmap(s->data, s->size); | |
fc3abdf5 JH |
1813 | |
1814 | if (s->should_free || s->should_munmap) { | |
1815 | s->should_free = s->should_munmap = 0; | |
1816 | s->data = NULL; | |
1817 | } | |
eede7b7d JK |
1818 | } |
1819 | ||
1820 | void diff_free_filespec_data(struct diff_filespec *s) | |
1821 | { | |
8ae92e63 | 1822 | diff_free_filespec_blob(s); |
6973dcae JH |
1823 | free(s->cnt_data); |
1824 | s->cnt_data = NULL; | |
1825 | } | |
1826 | ||
1827 | static void prep_temp_blob(struct diff_tempfile *temp, | |
1828 | void *blob, | |
1829 | unsigned long size, | |
1830 | const unsigned char *sha1, | |
1831 | int mode) | |
1832 | { | |
1833 | int fd; | |
1834 | ||
1472966c | 1835 | fd = git_mkstemp(temp->tmp_path, PATH_MAX, ".diff_XXXXXX"); |
6973dcae | 1836 | if (fd < 0) |
e7a7be88 | 1837 | die("unable to create temp-file: %s", strerror(errno)); |
93822c22 | 1838 | if (write_in_full(fd, blob, size) != size) |
6973dcae JH |
1839 | die("unable to write temp-file"); |
1840 | close(fd); | |
1841 | temp->name = temp->tmp_path; | |
1842 | strcpy(temp->hex, sha1_to_hex(sha1)); | |
1843 | temp->hex[40] = 0; | |
1844 | sprintf(temp->mode, "%06o", mode); | |
1845 | } | |
1846 | ||
1847 | static void prepare_temp_file(const char *name, | |
1848 | struct diff_tempfile *temp, | |
1849 | struct diff_filespec *one) | |
1850 | { | |
1851 | if (!DIFF_FILE_VALID(one)) { | |
1852 | not_a_valid_file: | |
1853 | /* A '-' entry produces this for file-2, and | |
1854 | * a '+' entry produces this for file-1. | |
1855 | */ | |
1856 | temp->name = "/dev/null"; | |
1857 | strcpy(temp->hex, "."); | |
1858 | strcpy(temp->mode, "."); | |
1859 | return; | |
1860 | } | |
1861 | ||
1862 | if (!one->sha1_valid || | |
1510fea7 | 1863 | reuse_worktree_file(name, one->sha1, 1)) { |
6973dcae JH |
1864 | struct stat st; |
1865 | if (lstat(name, &st) < 0) { | |
1866 | if (errno == ENOENT) | |
1867 | goto not_a_valid_file; | |
1868 | die("stat(%s): %s", name, strerror(errno)); | |
1869 | } | |
1870 | if (S_ISLNK(st.st_mode)) { | |
1871 | int ret; | |
1872 | char buf[PATH_MAX + 1]; /* ought to be SYMLINK_MAX */ | |
dc49cd76 | 1873 | size_t sz = xsize_t(st.st_size); |
6973dcae JH |
1874 | if (sizeof(buf) <= st.st_size) |
1875 | die("symlink too long: %s", name); | |
dc49cd76 | 1876 | ret = readlink(name, buf, sz); |
6973dcae JH |
1877 | if (ret < 0) |
1878 | die("readlink(%s)", name); | |
dc49cd76 | 1879 | prep_temp_blob(temp, buf, sz, |
6973dcae JH |
1880 | (one->sha1_valid ? |
1881 | one->sha1 : null_sha1), | |
1882 | (one->sha1_valid ? | |
1883 | one->mode : S_IFLNK)); | |
1884 | } | |
1885 | else { | |
1886 | /* we can borrow from the file in the work tree */ | |
1887 | temp->name = name; | |
1888 | if (!one->sha1_valid) | |
1889 | strcpy(temp->hex, sha1_to_hex(null_sha1)); | |
1890 | else | |
1891 | strcpy(temp->hex, sha1_to_hex(one->sha1)); | |
1892 | /* Even though we may sometimes borrow the | |
1893 | * contents from the work tree, we always want | |
1894 | * one->mode. mode is trustworthy even when | |
1895 | * !(one->sha1_valid), as long as | |
1896 | * DIFF_FILE_VALID(one). | |
1897 | */ | |
1898 | sprintf(temp->mode, "%06o", one->mode); | |
1899 | } | |
1900 | return; | |
1901 | } | |
1902 | else { | |
1903 | if (diff_populate_filespec(one, 0)) | |
1904 | die("cannot read data blob for %s", one->path); | |
1905 | prep_temp_blob(temp, one->data, one->size, | |
1906 | one->sha1, one->mode); | |
1907 | } | |
1908 | } | |
1909 | ||
1910 | static void remove_tempfile(void) | |
1911 | { | |
1912 | int i; | |
1913 | ||
1914 | for (i = 0; i < 2; i++) | |
1915 | if (diff_temp[i].name == diff_temp[i].tmp_path) { | |
1916 | unlink(diff_temp[i].name); | |
1917 | diff_temp[i].name = NULL; | |
1918 | } | |
1919 | } | |
1920 | ||
1921 | static void remove_tempfile_on_signal(int signo) | |
1922 | { | |
1923 | remove_tempfile(); | |
1924 | signal(SIGINT, SIG_DFL); | |
1925 | raise(signo); | |
1926 | } | |
1927 | ||
6973dcae JH |
1928 | /* An external diff command takes: |
1929 | * | |
1930 | * diff-cmd name infile1 infile1-sha1 infile1-mode \ | |
1931 | * infile2 infile2-sha1 infile2-mode [ rename-to ] | |
1932 | * | |
1933 | */ | |
1934 | static void run_external_diff(const char *pgm, | |
1935 | const char *name, | |
1936 | const char *other, | |
1937 | struct diff_filespec *one, | |
1938 | struct diff_filespec *two, | |
1939 | const char *xfrm_msg, | |
1940 | int complete_rewrite) | |
1941 | { | |
1942 | const char *spawn_arg[10]; | |
1943 | struct diff_tempfile *temp = diff_temp; | |
1944 | int retval; | |
1945 | static int atexit_asked = 0; | |
1946 | const char *othername; | |
1947 | const char **arg = &spawn_arg[0]; | |
1948 | ||
1949 | othername = (other? other : name); | |
1950 | if (one && two) { | |
1951 | prepare_temp_file(name, &temp[0], one); | |
1952 | prepare_temp_file(othername, &temp[1], two); | |
1953 | if (! atexit_asked && | |
1954 | (temp[0].name == temp[0].tmp_path || | |
1955 | temp[1].name == temp[1].tmp_path)) { | |
1956 | atexit_asked = 1; | |
1957 | atexit(remove_tempfile); | |
1958 | } | |
1959 | signal(SIGINT, remove_tempfile_on_signal); | |
1960 | } | |
1961 | ||
1962 | if (one && two) { | |
1963 | *arg++ = pgm; | |
1964 | *arg++ = name; | |
1965 | *arg++ = temp[0].name; | |
1966 | *arg++ = temp[0].hex; | |
1967 | *arg++ = temp[0].mode; | |
1968 | *arg++ = temp[1].name; | |
1969 | *arg++ = temp[1].hex; | |
1970 | *arg++ = temp[1].mode; | |
1971 | if (other) { | |
1972 | *arg++ = other; | |
1973 | *arg++ = xfrm_msg; | |
1974 | } | |
1975 | } else { | |
1976 | *arg++ = pgm; | |
1977 | *arg++ = name; | |
1978 | } | |
1979 | *arg = NULL; | |
d5535ec7 JS |
1980 | fflush(NULL); |
1981 | retval = run_command_v_opt(spawn_arg, 0); | |
6973dcae JH |
1982 | remove_tempfile(); |
1983 | if (retval) { | |
1984 | fprintf(stderr, "external diff died, stopping at %s.\n", name); | |
1985 | exit(1); | |
1986 | } | |
1987 | } | |
1988 | ||
f1af60bd JH |
1989 | static const char *external_diff_attr(const char *name) |
1990 | { | |
1991 | struct git_attr_check attr_diff_check; | |
1992 | ||
cd676a51 JH |
1993 | if (!name) |
1994 | return NULL; | |
1995 | ||
f1af60bd JH |
1996 | setup_diff_attr_check(&attr_diff_check); |
1997 | if (!git_checkattr(name, 1, &attr_diff_check)) { | |
1998 | const char *value = attr_diff_check.value; | |
1999 | if (!ATTR_TRUE(value) && | |
2000 | !ATTR_FALSE(value) && | |
2001 | !ATTR_UNSET(value)) { | |
2002 | struct ll_diff_driver *drv; | |
2003 | ||
f1af60bd JH |
2004 | for (drv = user_diff; drv; drv = drv->next) |
2005 | if (!strcmp(drv->name, value)) | |
2006 | return drv->cmd; | |
2007 | } | |
2008 | } | |
2009 | return NULL; | |
2010 | } | |
2011 | ||
6973dcae JH |
2012 | static void run_diff_cmd(const char *pgm, |
2013 | const char *name, | |
2014 | const char *other, | |
cd676a51 | 2015 | const char *attr_path, |
6973dcae JH |
2016 | struct diff_filespec *one, |
2017 | struct diff_filespec *two, | |
2018 | const char *xfrm_msg, | |
051308f6 | 2019 | struct diff_options *o, |
6973dcae JH |
2020 | int complete_rewrite) |
2021 | { | |
8f67f8ae | 2022 | if (!DIFF_OPT_TST(o, ALLOW_EXTERNAL)) |
f1af60bd JH |
2023 | pgm = NULL; |
2024 | else { | |
cd676a51 | 2025 | const char *cmd = external_diff_attr(attr_path); |
f1af60bd JH |
2026 | if (cmd) |
2027 | pgm = cmd; | |
2028 | } | |
2029 | ||
6973dcae JH |
2030 | if (pgm) { |
2031 | run_external_diff(pgm, name, other, one, two, xfrm_msg, | |
2032 | complete_rewrite); | |
2033 | return; | |
2034 | } | |
2035 | if (one && two) | |
2036 | builtin_diff(name, other ? other : name, | |
051308f6 | 2037 | one, two, xfrm_msg, o, complete_rewrite); |
6973dcae | 2038 | else |
c0c77734 | 2039 | fprintf(o->file, "* Unmerged path %s\n", name); |
6973dcae JH |
2040 | } |
2041 | ||
2042 | static void diff_fill_sha1_info(struct diff_filespec *one) | |
2043 | { | |
2044 | if (DIFF_FILE_VALID(one)) { | |
2045 | if (!one->sha1_valid) { | |
2046 | struct stat st; | |
5332b2af JS |
2047 | if (!strcmp(one->path, "-")) { |
2048 | hashcpy(one->sha1, null_sha1); | |
2049 | return; | |
2050 | } | |
6973dcae JH |
2051 | if (lstat(one->path, &st) < 0) |
2052 | die("stat %s", one->path); | |
2053 | if (index_path(one->sha1, one->path, &st, 0)) | |
2054 | die("cannot hash %s\n", one->path); | |
2055 | } | |
2056 | } | |
2057 | else | |
e702496e | 2058 | hashclr(one->sha1); |
6973dcae JH |
2059 | } |
2060 | ||
125b7630 RS |
2061 | static int similarity_index(struct diff_filepair *p) |
2062 | { | |
2063 | return p->score * 100 / MAX_SCORE; | |
2064 | } | |
2065 | ||
cd676a51 JH |
2066 | static void strip_prefix(int prefix_length, const char **namep, const char **otherp) |
2067 | { | |
2068 | /* Strip the prefix but do not molest /dev/null and absolute paths */ | |
2069 | if (*namep && **namep != '/') | |
2070 | *namep += prefix_length; | |
2071 | if (*otherp && **otherp != '/') | |
2072 | *otherp += prefix_length; | |
2073 | } | |
2074 | ||
6973dcae JH |
2075 | static void run_diff(struct diff_filepair *p, struct diff_options *o) |
2076 | { | |
2077 | const char *pgm = external_diff(); | |
663af342 PH |
2078 | struct strbuf msg; |
2079 | char *xfrm_msg; | |
2080 | struct diff_filespec *one = p->one; | |
2081 | struct diff_filespec *two = p->two; | |
6973dcae JH |
2082 | const char *name; |
2083 | const char *other; | |
cd676a51 | 2084 | const char *attr_path; |
6973dcae | 2085 | int complete_rewrite = 0; |
663af342 | 2086 | |
cd676a51 JH |
2087 | name = p->one->path; |
2088 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
2089 | attr_path = name; | |
2090 | if (o->prefix_length) | |
2091 | strip_prefix(o->prefix_length, &name, &other); | |
6973dcae JH |
2092 | |
2093 | if (DIFF_PAIR_UNMERGED(p)) { | |
cd676a51 JH |
2094 | run_diff_cmd(pgm, name, NULL, attr_path, |
2095 | NULL, NULL, NULL, o, 0); | |
6973dcae JH |
2096 | return; |
2097 | } | |
2098 | ||
6973dcae JH |
2099 | diff_fill_sha1_info(one); |
2100 | diff_fill_sha1_info(two); | |
2101 | ||
663af342 | 2102 | strbuf_init(&msg, PATH_MAX * 2 + 300); |
6973dcae JH |
2103 | switch (p->status) { |
2104 | case DIFF_STATUS_COPIED: | |
663af342 PH |
2105 | strbuf_addf(&msg, "similarity index %d%%", similarity_index(p)); |
2106 | strbuf_addstr(&msg, "\ncopy from "); | |
2107 | quote_c_style(name, &msg, NULL, 0); | |
2108 | strbuf_addstr(&msg, "\ncopy to "); | |
2109 | quote_c_style(other, &msg, NULL, 0); | |
2110 | strbuf_addch(&msg, '\n'); | |
6973dcae JH |
2111 | break; |
2112 | case DIFF_STATUS_RENAMED: | |
663af342 PH |
2113 | strbuf_addf(&msg, "similarity index %d%%", similarity_index(p)); |
2114 | strbuf_addstr(&msg, "\nrename from "); | |
2115 | quote_c_style(name, &msg, NULL, 0); | |
2116 | strbuf_addstr(&msg, "\nrename to "); | |
2117 | quote_c_style(other, &msg, NULL, 0); | |
2118 | strbuf_addch(&msg, '\n'); | |
6973dcae JH |
2119 | break; |
2120 | case DIFF_STATUS_MODIFIED: | |
2121 | if (p->score) { | |
663af342 | 2122 | strbuf_addf(&msg, "dissimilarity index %d%%\n", |
125b7630 | 2123 | similarity_index(p)); |
6973dcae JH |
2124 | complete_rewrite = 1; |
2125 | break; | |
2126 | } | |
2127 | /* fallthru */ | |
2128 | default: | |
2129 | /* nothing */ | |
2130 | ; | |
2131 | } | |
2132 | ||
a89fccd2 | 2133 | if (hashcmp(one->sha1, two->sha1)) { |
8f67f8ae | 2134 | int abbrev = DIFF_OPT_TST(o, FULL_INDEX) ? 40 : DEFAULT_ABBREV; |
6973dcae | 2135 | |
8f67f8ae | 2136 | if (DIFF_OPT_TST(o, BINARY)) { |
82793c55 | 2137 | mmfile_t mf; |
29a3eefd JH |
2138 | if ((!fill_mmfile(&mf, one) && diff_filespec_is_binary(one)) || |
2139 | (!fill_mmfile(&mf, two) && diff_filespec_is_binary(two))) | |
82793c55 JH |
2140 | abbrev = 40; |
2141 | } | |
663af342 | 2142 | strbuf_addf(&msg, "index %.*s..%.*s", |
dcb3450f LT |
2143 | abbrev, sha1_to_hex(one->sha1), |
2144 | abbrev, sha1_to_hex(two->sha1)); | |
6973dcae | 2145 | if (one->mode == two->mode) |
663af342 PH |
2146 | strbuf_addf(&msg, " %06o", one->mode); |
2147 | strbuf_addch(&msg, '\n'); | |
6973dcae JH |
2148 | } |
2149 | ||
663af342 PH |
2150 | if (msg.len) |
2151 | strbuf_setlen(&msg, msg.len - 1); | |
2152 | xfrm_msg = msg.len ? msg.buf : NULL; | |
6973dcae JH |
2153 | |
2154 | if (!pgm && | |
2155 | DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) && | |
2156 | (S_IFMT & one->mode) != (S_IFMT & two->mode)) { | |
2157 | /* a filepair that changes between file and symlink | |
2158 | * needs to be split into deletion and creation. | |
2159 | */ | |
2160 | struct diff_filespec *null = alloc_filespec(two->path); | |
cd676a51 JH |
2161 | run_diff_cmd(NULL, name, other, attr_path, |
2162 | one, null, xfrm_msg, o, 0); | |
6973dcae JH |
2163 | free(null); |
2164 | null = alloc_filespec(one->path); | |
cd676a51 JH |
2165 | run_diff_cmd(NULL, name, other, attr_path, |
2166 | null, two, xfrm_msg, o, 0); | |
6973dcae JH |
2167 | free(null); |
2168 | } | |
2169 | else | |
cd676a51 JH |
2170 | run_diff_cmd(pgm, name, other, attr_path, |
2171 | one, two, xfrm_msg, o, complete_rewrite); | |
6973dcae | 2172 | |
663af342 | 2173 | strbuf_release(&msg); |
6973dcae JH |
2174 | } |
2175 | ||
2176 | static void run_diffstat(struct diff_filepair *p, struct diff_options *o, | |
2177 | struct diffstat_t *diffstat) | |
2178 | { | |
2179 | const char *name; | |
2180 | const char *other; | |
710158e3 | 2181 | int complete_rewrite = 0; |
6973dcae JH |
2182 | |
2183 | if (DIFF_PAIR_UNMERGED(p)) { | |
2184 | /* unmerged */ | |
0d21efa5 | 2185 | builtin_diffstat(p->one->path, NULL, NULL, NULL, diffstat, o, 0); |
6973dcae JH |
2186 | return; |
2187 | } | |
2188 | ||
2189 | name = p->one->path; | |
2190 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
2191 | ||
cd676a51 JH |
2192 | if (o->prefix_length) |
2193 | strip_prefix(o->prefix_length, &name, &other); | |
2194 | ||
6973dcae JH |
2195 | diff_fill_sha1_info(p->one); |
2196 | diff_fill_sha1_info(p->two); | |
2197 | ||
710158e3 JH |
2198 | if (p->status == DIFF_STATUS_MODIFIED && p->score) |
2199 | complete_rewrite = 1; | |
0d21efa5 | 2200 | builtin_diffstat(name, other, p->one, p->two, diffstat, o, complete_rewrite); |
6973dcae JH |
2201 | } |
2202 | ||
88246898 JS |
2203 | static void run_checkdiff(struct diff_filepair *p, struct diff_options *o) |
2204 | { | |
2205 | const char *name; | |
2206 | const char *other; | |
cd676a51 | 2207 | const char *attr_path; |
88246898 JS |
2208 | |
2209 | if (DIFF_PAIR_UNMERGED(p)) { | |
2210 | /* unmerged */ | |
2211 | return; | |
2212 | } | |
2213 | ||
2214 | name = p->one->path; | |
2215 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
cd676a51 JH |
2216 | attr_path = other ? other : name; |
2217 | ||
2218 | if (o->prefix_length) | |
2219 | strip_prefix(o->prefix_length, &name, &other); | |
88246898 JS |
2220 | |
2221 | diff_fill_sha1_info(p->one); | |
2222 | diff_fill_sha1_info(p->two); | |
2223 | ||
cd676a51 | 2224 | builtin_checkdiff(name, other, attr_path, p->one, p->two, o); |
88246898 JS |
2225 | } |
2226 | ||
6973dcae JH |
2227 | void diff_setup(struct diff_options *options) |
2228 | { | |
2229 | memset(options, 0, sizeof(*options)); | |
c0c77734 DB |
2230 | |
2231 | options->file = stdout; | |
2232 | ||
6973dcae JH |
2233 | options->line_termination = '\n'; |
2234 | options->break_opt = -1; | |
2235 | options->rename_limit = -1; | |
7df7c019 | 2236 | options->dirstat_percent = 3; |
ee1e5412 | 2237 | options->context = 3; |
6973dcae JH |
2238 | |
2239 | options->change = diff_change; | |
2240 | options->add_remove = diff_addremove; | |
6b2f2d98 | 2241 | if (diff_use_color_default > 0) |
8f67f8ae PH |
2242 | DIFF_OPT_SET(options, COLOR_DIFF); |
2243 | else | |
2244 | DIFF_OPT_CLR(options, COLOR_DIFF); | |
b68ea12e | 2245 | options->detect_rename = diff_detect_rename_default; |
eab9a40b JS |
2246 | |
2247 | options->a_prefix = "a/"; | |
2248 | options->b_prefix = "b/"; | |
6973dcae JH |
2249 | } |
2250 | ||
2251 | int diff_setup_done(struct diff_options *options) | |
2252 | { | |
d7de00f7 TH |
2253 | int count = 0; |
2254 | ||
2255 | if (options->output_format & DIFF_FORMAT_NAME) | |
2256 | count++; | |
2257 | if (options->output_format & DIFF_FORMAT_NAME_STATUS) | |
2258 | count++; | |
2259 | if (options->output_format & DIFF_FORMAT_CHECKDIFF) | |
2260 | count++; | |
2261 | if (options->output_format & DIFF_FORMAT_NO_OUTPUT) | |
2262 | count++; | |
2263 | if (count > 1) | |
2264 | die("--name-only, --name-status, --check and -s are mutually exclusive"); | |
2265 | ||
8f67f8ae | 2266 | if (DIFF_OPT_TST(options, FIND_COPIES_HARDER)) |
03b9d560 JH |
2267 | options->detect_rename = DIFF_DETECT_COPY; |
2268 | ||
cd676a51 JH |
2269 | if (!DIFF_OPT_TST(options, RELATIVE_NAME)) |
2270 | options->prefix = NULL; | |
2271 | if (options->prefix) | |
2272 | options->prefix_length = strlen(options->prefix); | |
2273 | else | |
2274 | options->prefix_length = 0; | |
2275 | ||
c6744349 TH |
2276 | if (options->output_format & (DIFF_FORMAT_NAME | |
2277 | DIFF_FORMAT_NAME_STATUS | | |
2278 | DIFF_FORMAT_CHECKDIFF | | |
2279 | DIFF_FORMAT_NO_OUTPUT)) | |
2280 | options->output_format &= ~(DIFF_FORMAT_RAW | | |
74e2abe5 | 2281 | DIFF_FORMAT_NUMSTAT | |
c6744349 | 2282 | DIFF_FORMAT_DIFFSTAT | |
ebd124c6 | 2283 | DIFF_FORMAT_SHORTSTAT | |
7df7c019 | 2284 | DIFF_FORMAT_DIRSTAT | |
c6744349 TH |
2285 | DIFF_FORMAT_SUMMARY | |
2286 | DIFF_FORMAT_PATCH); | |
2287 | ||
6973dcae JH |
2288 | /* |
2289 | * These cases always need recursive; we do not drop caller-supplied | |
2290 | * recursive bits for other formats here. | |
2291 | */ | |
c6744349 | 2292 | if (options->output_format & (DIFF_FORMAT_PATCH | |
74e2abe5 | 2293 | DIFF_FORMAT_NUMSTAT | |
c6744349 | 2294 | DIFF_FORMAT_DIFFSTAT | |
ebd124c6 | 2295 | DIFF_FORMAT_SHORTSTAT | |
7df7c019 | 2296 | DIFF_FORMAT_DIRSTAT | |
d7014dc0 | 2297 | DIFF_FORMAT_SUMMARY | |
c6744349 | 2298 | DIFF_FORMAT_CHECKDIFF)) |
8f67f8ae | 2299 | DIFF_OPT_SET(options, RECURSIVE); |
5e363541 | 2300 | /* |
3969cf7d | 2301 | * Also pickaxe would not work very well if you do not say recursive |
5e363541 | 2302 | */ |
3969cf7d | 2303 | if (options->pickaxe) |
8f67f8ae | 2304 | DIFF_OPT_SET(options, RECURSIVE); |
5e363541 | 2305 | |
6973dcae JH |
2306 | if (options->detect_rename && options->rename_limit < 0) |
2307 | options->rename_limit = diff_rename_limit_default; | |
2308 | if (options->setup & DIFF_SETUP_USE_CACHE) { | |
2309 | if (!active_cache) | |
2310 | /* read-cache does not die even when it fails | |
2311 | * so it is safe for us to do this here. Also | |
2312 | * it does not smudge active_cache or active_nr | |
2313 | * when it fails, so we do not have to worry about | |
2314 | * cleaning it up ourselves either. | |
2315 | */ | |
2316 | read_cache(); | |
2317 | } | |
6973dcae JH |
2318 | if (options->abbrev <= 0 || 40 < options->abbrev) |
2319 | options->abbrev = 40; /* full */ | |
2320 | ||
68aacb2f JH |
2321 | /* |
2322 | * It does not make sense to show the first hit we happened | |
2323 | * to have found. It does not make sense not to return with | |
2324 | * exit code in such a case either. | |
2325 | */ | |
8f67f8ae | 2326 | if (DIFF_OPT_TST(options, QUIET)) { |
68aacb2f | 2327 | options->output_format = DIFF_FORMAT_NO_OUTPUT; |
8f67f8ae | 2328 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); |
68aacb2f JH |
2329 | } |
2330 | ||
2331 | /* | |
2332 | * If we postprocess in diffcore, we cannot simply return | |
2333 | * upon the first hit. We need to run diff as usual. | |
2334 | */ | |
2335 | if (options->pickaxe || options->filter) | |
8f67f8ae | 2336 | DIFF_OPT_CLR(options, QUIET); |
68aacb2f | 2337 | |
6973dcae JH |
2338 | return 0; |
2339 | } | |
2340 | ||
d2543b8e | 2341 | static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val) |
ee1e5412 LT |
2342 | { |
2343 | char c, *eq; | |
2344 | int len; | |
2345 | ||
2346 | if (*arg != '-') | |
2347 | return 0; | |
2348 | c = *++arg; | |
2349 | if (!c) | |
2350 | return 0; | |
2351 | if (c == arg_short) { | |
2352 | c = *++arg; | |
2353 | if (!c) | |
2354 | return 1; | |
2355 | if (val && isdigit(c)) { | |
2356 | char *end; | |
2357 | int n = strtoul(arg, &end, 10); | |
2358 | if (*end) | |
2359 | return 0; | |
2360 | *val = n; | |
2361 | return 1; | |
2362 | } | |
2363 | return 0; | |
2364 | } | |
2365 | if (c != '-') | |
2366 | return 0; | |
2367 | arg++; | |
2368 | eq = strchr(arg, '='); | |
2369 | if (eq) | |
2370 | len = eq - arg; | |
2371 | else | |
2372 | len = strlen(arg); | |
2373 | if (!len || strncmp(arg, arg_long, len)) | |
2374 | return 0; | |
2375 | if (eq) { | |
2376 | int n; | |
2377 | char *end; | |
2378 | if (!isdigit(*++eq)) | |
2379 | return 0; | |
2380 | n = strtoul(eq, &end, 10); | |
2381 | if (*end) | |
2382 | return 0; | |
2383 | *val = n; | |
2384 | } | |
2385 | return 1; | |
2386 | } | |
2387 | ||
16befb8b JH |
2388 | static int diff_scoreopt_parse(const char *opt); |
2389 | ||
6973dcae JH |
2390 | int diff_opt_parse(struct diff_options *options, const char **av, int ac) |
2391 | { | |
2392 | const char *arg = av[0]; | |
d054680c PH |
2393 | |
2394 | /* Output format options */ | |
6973dcae | 2395 | if (!strcmp(arg, "-p") || !strcmp(arg, "-u")) |
c6744349 | 2396 | options->output_format |= DIFF_FORMAT_PATCH; |
ee1e5412 | 2397 | else if (opt_arg(arg, 'U', "unified", &options->context)) |
c6744349 | 2398 | options->output_format |= DIFF_FORMAT_PATCH; |
a610786f TH |
2399 | else if (!strcmp(arg, "--raw")) |
2400 | options->output_format |= DIFF_FORMAT_RAW; | |
8f67f8ae | 2401 | else if (!strcmp(arg, "--patch-with-raw")) |
c6744349 | 2402 | options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_RAW; |
8f67f8ae | 2403 | else if (!strcmp(arg, "--numstat")) |
74e2abe5 | 2404 | options->output_format |= DIFF_FORMAT_NUMSTAT; |
8f67f8ae | 2405 | else if (!strcmp(arg, "--shortstat")) |
ebd124c6 | 2406 | options->output_format |= DIFF_FORMAT_SHORTSTAT; |
7df7c019 LT |
2407 | else if (opt_arg(arg, 'X', "dirstat", &options->dirstat_percent)) |
2408 | options->output_format |= DIFF_FORMAT_DIRSTAT; | |
2409 | else if (!strcmp(arg, "--cumulative")) | |
2410 | options->output_format |= DIFF_FORMAT_CUMULATIVE; | |
d054680c PH |
2411 | else if (!strcmp(arg, "--check")) |
2412 | options->output_format |= DIFF_FORMAT_CHECKDIFF; | |
2413 | else if (!strcmp(arg, "--summary")) | |
2414 | options->output_format |= DIFF_FORMAT_SUMMARY; | |
2415 | else if (!strcmp(arg, "--patch-with-stat")) | |
2416 | options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_DIFFSTAT; | |
2417 | else if (!strcmp(arg, "--name-only")) | |
2418 | options->output_format |= DIFF_FORMAT_NAME; | |
2419 | else if (!strcmp(arg, "--name-status")) | |
2420 | options->output_format |= DIFF_FORMAT_NAME_STATUS; | |
2421 | else if (!strcmp(arg, "-s")) | |
2422 | options->output_format |= DIFF_FORMAT_NO_OUTPUT; | |
cc44c765 | 2423 | else if (!prefixcmp(arg, "--stat")) { |
5c5b2ea9 LT |
2424 | char *end; |
2425 | int width = options->stat_width; | |
2426 | int name_width = options->stat_name_width; | |
2427 | arg += 6; | |
2428 | end = (char *)arg; | |
2429 | ||
2430 | switch (*arg) { | |
2431 | case '-': | |
cc44c765 | 2432 | if (!prefixcmp(arg, "-width=")) |
5c5b2ea9 | 2433 | width = strtoul(arg + 7, &end, 10); |
cc44c765 | 2434 | else if (!prefixcmp(arg, "-name-width=")) |
5c5b2ea9 LT |
2435 | name_width = strtoul(arg + 12, &end, 10); |
2436 | break; | |
2437 | case '=': | |
2438 | width = strtoul(arg+1, &end, 10); | |
2439 | if (*end == ',') | |
2440 | name_width = strtoul(end+1, &end, 10); | |
2441 | } | |
2442 | ||
2443 | /* Important! This checks all the error cases! */ | |
2444 | if (*end) | |
2445 | return 0; | |
c6744349 | 2446 | options->output_format |= DIFF_FORMAT_DIFFSTAT; |
5c5b2ea9 LT |
2447 | options->stat_name_width = name_width; |
2448 | options->stat_width = width; | |
a2540023 | 2449 | } |
d054680c PH |
2450 | |
2451 | /* renames options */ | |
cc44c765 | 2452 | else if (!prefixcmp(arg, "-B")) { |
8f67f8ae | 2453 | if ((options->break_opt = diff_scoreopt_parse(arg)) == -1) |
6973dcae JH |
2454 | return -1; |
2455 | } | |
cc44c765 | 2456 | else if (!prefixcmp(arg, "-M")) { |
8f67f8ae | 2457 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) |
6973dcae JH |
2458 | return -1; |
2459 | options->detect_rename = DIFF_DETECT_RENAME; | |
2460 | } | |
cc44c765 | 2461 | else if (!prefixcmp(arg, "-C")) { |
ca6c0970 | 2462 | if (options->detect_rename == DIFF_DETECT_COPY) |
8f67f8ae PH |
2463 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); |
2464 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) | |
6973dcae JH |
2465 | return -1; |
2466 | options->detect_rename = DIFF_DETECT_COPY; | |
2467 | } | |
d054680c PH |
2468 | else if (!strcmp(arg, "--no-renames")) |
2469 | options->detect_rename = 0; | |
cd676a51 JH |
2470 | else if (!strcmp(arg, "--relative")) |
2471 | DIFF_OPT_SET(options, RELATIVE_NAME); | |
c0cb4a06 JH |
2472 | else if (!prefixcmp(arg, "--relative=")) { |
2473 | DIFF_OPT_SET(options, RELATIVE_NAME); | |
2474 | options->prefix = arg + 11; | |
2475 | } | |
d054680c PH |
2476 | |
2477 | /* xdiff options */ | |
2478 | else if (!strcmp(arg, "-w") || !strcmp(arg, "--ignore-all-space")) | |
2479 | options->xdl_opts |= XDF_IGNORE_WHITESPACE; | |
2480 | else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change")) | |
2481 | options->xdl_opts |= XDF_IGNORE_WHITESPACE_CHANGE; | |
2482 | else if (!strcmp(arg, "--ignore-space-at-eol")) | |
2483 | options->xdl_opts |= XDF_IGNORE_WHITESPACE_AT_EOL; | |
2484 | ||
2485 | /* flags options */ | |
2486 | else if (!strcmp(arg, "--binary")) { | |
2487 | options->output_format |= DIFF_FORMAT_PATCH; | |
2488 | DIFF_OPT_SET(options, BINARY); | |
2489 | } | |
2490 | else if (!strcmp(arg, "--full-index")) | |
2491 | DIFF_OPT_SET(options, FULL_INDEX); | |
2492 | else if (!strcmp(arg, "-a") || !strcmp(arg, "--text")) | |
2493 | DIFF_OPT_SET(options, TEXT); | |
2494 | else if (!strcmp(arg, "-R")) | |
2495 | DIFF_OPT_SET(options, REVERSE_DIFF); | |
6973dcae | 2496 | else if (!strcmp(arg, "--find-copies-harder")) |
8f67f8ae | 2497 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); |
750f7b66 | 2498 | else if (!strcmp(arg, "--follow")) |
8f67f8ae | 2499 | DIFF_OPT_SET(options, FOLLOW_RENAMES); |
cd112cef | 2500 | else if (!strcmp(arg, "--color")) |
8f67f8ae | 2501 | DIFF_OPT_SET(options, COLOR_DIFF); |
fef88bb0 | 2502 | else if (!strcmp(arg, "--no-color")) |
8f67f8ae | 2503 | DIFF_OPT_CLR(options, COLOR_DIFF); |
f59a59e2 | 2504 | else if (!strcmp(arg, "--color-words")) |
8f67f8ae | 2505 | options->flags |= DIFF_OPT_COLOR_DIFF | DIFF_OPT_COLOR_DIFF_WORDS; |
41bbf9d5 | 2506 | else if (!strcmp(arg, "--exit-code")) |
8f67f8ae | 2507 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); |
68aacb2f | 2508 | else if (!strcmp(arg, "--quiet")) |
8f67f8ae | 2509 | DIFF_OPT_SET(options, QUIET); |
72909bef | 2510 | else if (!strcmp(arg, "--ext-diff")) |
8f67f8ae | 2511 | DIFF_OPT_SET(options, ALLOW_EXTERNAL); |
72909bef | 2512 | else if (!strcmp(arg, "--no-ext-diff")) |
8f67f8ae | 2513 | DIFF_OPT_CLR(options, ALLOW_EXTERNAL); |
50fd9bd8 JS |
2514 | else if (!strcmp(arg, "--ignore-submodules")) |
2515 | DIFF_OPT_SET(options, IGNORE_SUBMODULES); | |
d054680c PH |
2516 | |
2517 | /* misc options */ | |
2518 | else if (!strcmp(arg, "-z")) | |
2519 | options->line_termination = 0; | |
2520 | else if (!prefixcmp(arg, "-l")) | |
2521 | options->rename_limit = strtoul(arg+2, NULL, 10); | |
2522 | else if (!prefixcmp(arg, "-S")) | |
2523 | options->pickaxe = arg + 2; | |
2524 | else if (!strcmp(arg, "--pickaxe-all")) | |
2525 | options->pickaxe_opts = DIFF_PICKAXE_ALL; | |
2526 | else if (!strcmp(arg, "--pickaxe-regex")) | |
2527 | options->pickaxe_opts = DIFF_PICKAXE_REGEX; | |
2528 | else if (!prefixcmp(arg, "-O")) | |
2529 | options->orderfile = arg + 2; | |
2530 | else if (!prefixcmp(arg, "--diff-filter=")) | |
2531 | options->filter = arg + 14; | |
2532 | else if (!strcmp(arg, "--abbrev")) | |
2533 | options->abbrev = DEFAULT_ABBREV; | |
2534 | else if (!prefixcmp(arg, "--abbrev=")) { | |
2535 | options->abbrev = strtoul(arg + 9, NULL, 10); | |
2536 | if (options->abbrev < MINIMUM_ABBREV) | |
2537 | options->abbrev = MINIMUM_ABBREV; | |
2538 | else if (40 < options->abbrev) | |
2539 | options->abbrev = 40; | |
2540 | } | |
eab9a40b JS |
2541 | else if (!prefixcmp(arg, "--src-prefix=")) |
2542 | options->a_prefix = arg + 13; | |
2543 | else if (!prefixcmp(arg, "--dst-prefix=")) | |
2544 | options->b_prefix = arg + 13; | |
2545 | else if (!strcmp(arg, "--no-prefix")) | |
2546 | options->a_prefix = options->b_prefix = ""; | |
c0c77734 DB |
2547 | else if (!prefixcmp(arg, "--output=")) { |
2548 | options->file = fopen(arg + strlen("--output="), "w"); | |
2549 | options->close_file = 1; | |
2550 | } else | |
6973dcae JH |
2551 | return 0; |
2552 | return 1; | |
2553 | } | |
2554 | ||
2555 | static int parse_num(const char **cp_p) | |
2556 | { | |
2557 | unsigned long num, scale; | |
2558 | int ch, dot; | |
2559 | const char *cp = *cp_p; | |
2560 | ||
2561 | num = 0; | |
2562 | scale = 1; | |
2563 | dot = 0; | |
2564 | for(;;) { | |
2565 | ch = *cp; | |
2566 | if ( !dot && ch == '.' ) { | |
2567 | scale = 1; | |
2568 | dot = 1; | |
2569 | } else if ( ch == '%' ) { | |
2570 | scale = dot ? scale*100 : 100; | |
2571 | cp++; /* % is always at the end */ | |
2572 | break; | |
2573 | } else if ( ch >= '0' && ch <= '9' ) { | |
2574 | if ( scale < 100000 ) { | |
2575 | scale *= 10; | |
2576 | num = (num*10) + (ch-'0'); | |
2577 | } | |
2578 | } else { | |
2579 | break; | |
2580 | } | |
2581 | cp++; | |
2582 | } | |
2583 | *cp_p = cp; | |
2584 | ||
2585 | /* user says num divided by scale and we say internally that | |
2586 | * is MAX_SCORE * num / scale. | |
2587 | */ | |
dc49cd76 | 2588 | return (int)((num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale)); |
6973dcae JH |
2589 | } |
2590 | ||
16befb8b | 2591 | static int diff_scoreopt_parse(const char *opt) |
6973dcae JH |
2592 | { |
2593 | int opt1, opt2, cmd; | |
2594 | ||
2595 | if (*opt++ != '-') | |
2596 | return -1; | |
2597 | cmd = *opt++; | |
2598 | if (cmd != 'M' && cmd != 'C' && cmd != 'B') | |
2599 | return -1; /* that is not a -M, -C nor -B option */ | |
2600 | ||
2601 | opt1 = parse_num(&opt); | |
2602 | if (cmd != 'B') | |
2603 | opt2 = 0; | |
2604 | else { | |
2605 | if (*opt == 0) | |
2606 | opt2 = 0; | |
2607 | else if (*opt != '/') | |
2608 | return -1; /* we expect -B80/99 or -B80 */ | |
2609 | else { | |
2610 | opt++; | |
2611 | opt2 = parse_num(&opt); | |
2612 | } | |
2613 | } | |
2614 | if (*opt != 0) | |
2615 | return -1; | |
2616 | return opt1 | (opt2 << 16); | |
2617 | } | |
2618 | ||
2619 | struct diff_queue_struct diff_queued_diff; | |
2620 | ||
2621 | void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp) | |
2622 | { | |
2623 | if (queue->alloc <= queue->nr) { | |
2624 | queue->alloc = alloc_nr(queue->alloc); | |
2625 | queue->queue = xrealloc(queue->queue, | |
2626 | sizeof(dp) * queue->alloc); | |
2627 | } | |
2628 | queue->queue[queue->nr++] = dp; | |
2629 | } | |
2630 | ||
2631 | struct diff_filepair *diff_queue(struct diff_queue_struct *queue, | |
2632 | struct diff_filespec *one, | |
2633 | struct diff_filespec *two) | |
2634 | { | |
ef677686 | 2635 | struct diff_filepair *dp = xcalloc(1, sizeof(*dp)); |
6973dcae JH |
2636 | dp->one = one; |
2637 | dp->two = two; | |
6973dcae JH |
2638 | if (queue) |
2639 | diff_q(queue, dp); | |
2640 | return dp; | |
2641 | } | |
2642 | ||
2643 | void diff_free_filepair(struct diff_filepair *p) | |
2644 | { | |
9fb88419 LT |
2645 | free_filespec(p->one); |
2646 | free_filespec(p->two); | |
6973dcae JH |
2647 | free(p); |
2648 | } | |
2649 | ||
2650 | /* This is different from find_unique_abbrev() in that | |
2651 | * it stuffs the result with dots for alignment. | |
2652 | */ | |
2653 | const char *diff_unique_abbrev(const unsigned char *sha1, int len) | |
2654 | { | |
2655 | int abblen; | |
2656 | const char *abbrev; | |
2657 | if (len == 40) | |
2658 | return sha1_to_hex(sha1); | |
2659 | ||
2660 | abbrev = find_unique_abbrev(sha1, len); | |
6973dcae JH |
2661 | abblen = strlen(abbrev); |
2662 | if (abblen < 37) { | |
2663 | static char hex[41]; | |
2664 | if (len < abblen && abblen <= len + 2) | |
2665 | sprintf(hex, "%s%.*s", abbrev, len+3-abblen, ".."); | |
2666 | else | |
2667 | sprintf(hex, "%s...", abbrev); | |
2668 | return hex; | |
2669 | } | |
2670 | return sha1_to_hex(sha1); | |
2671 | } | |
2672 | ||
663af342 | 2673 | static void diff_flush_raw(struct diff_filepair *p, struct diff_options *opt) |
6973dcae | 2674 | { |
663af342 PH |
2675 | int line_termination = opt->line_termination; |
2676 | int inter_name_termination = line_termination ? '\t' : '\0'; | |
6973dcae | 2677 | |
663af342 | 2678 | if (!(opt->output_format & DIFF_FORMAT_NAME_STATUS)) { |
c0c77734 DB |
2679 | fprintf(opt->file, ":%06o %06o %s ", p->one->mode, p->two->mode, |
2680 | diff_unique_abbrev(p->one->sha1, opt->abbrev)); | |
2681 | fprintf(opt->file, "%s ", diff_unique_abbrev(p->two->sha1, opt->abbrev)); | |
6973dcae | 2682 | } |
663af342 | 2683 | if (p->score) { |
c0c77734 DB |
2684 | fprintf(opt->file, "%c%03d%c", p->status, similarity_index(p), |
2685 | inter_name_termination); | |
663af342 | 2686 | } else { |
c0c77734 | 2687 | fprintf(opt->file, "%c%c", p->status, inter_name_termination); |
6973dcae | 2688 | } |
6973dcae | 2689 | |
cd676a51 JH |
2690 | if (p->status == DIFF_STATUS_COPIED || |
2691 | p->status == DIFF_STATUS_RENAMED) { | |
2692 | const char *name_a, *name_b; | |
2693 | name_a = p->one->path; | |
2694 | name_b = p->two->path; | |
2695 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 DB |
2696 | write_name_quoted(name_a, opt->file, inter_name_termination); |
2697 | write_name_quoted(name_b, opt->file, line_termination); | |
663af342 | 2698 | } else { |
cd676a51 JH |
2699 | const char *name_a, *name_b; |
2700 | name_a = p->one->mode ? p->one->path : p->two->path; | |
2701 | name_b = NULL; | |
2702 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 | 2703 | write_name_quoted(name_a, opt->file, line_termination); |
663af342 | 2704 | } |
6973dcae JH |
2705 | } |
2706 | ||
2707 | int diff_unmodified_pair(struct diff_filepair *p) | |
2708 | { | |
2709 | /* This function is written stricter than necessary to support | |
2710 | * the currently implemented transformers, but the idea is to | |
2711 | * let transformers to produce diff_filepairs any way they want, | |
2712 | * and filter and clean them up here before producing the output. | |
2713 | */ | |
663af342 | 2714 | struct diff_filespec *one = p->one, *two = p->two; |
6973dcae JH |
2715 | |
2716 | if (DIFF_PAIR_UNMERGED(p)) | |
2717 | return 0; /* unmerged is interesting */ | |
2718 | ||
6973dcae JH |
2719 | /* deletion, addition, mode or type change |
2720 | * and rename are all interesting. | |
2721 | */ | |
2722 | if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) || | |
2723 | DIFF_PAIR_MODE_CHANGED(p) || | |
2724 | strcmp(one->path, two->path)) | |
2725 | return 0; | |
2726 | ||
2727 | /* both are valid and point at the same path. that is, we are | |
2728 | * dealing with a change. | |
2729 | */ | |
2730 | if (one->sha1_valid && two->sha1_valid && | |
a89fccd2 | 2731 | !hashcmp(one->sha1, two->sha1)) |
6973dcae JH |
2732 | return 1; /* no change */ |
2733 | if (!one->sha1_valid && !two->sha1_valid) | |
2734 | return 1; /* both look at the same file on the filesystem. */ | |
2735 | return 0; | |
2736 | } | |
2737 | ||
2738 | static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o) | |
2739 | { | |
2740 | if (diff_unmodified_pair(p)) | |
2741 | return; | |
2742 | ||
2743 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
2744 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
2745 | return; /* no tree diffs in patch format */ | |
2746 | ||
2747 | run_diff(p, o); | |
2748 | } | |
2749 | ||
2750 | static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o, | |
2751 | struct diffstat_t *diffstat) | |
2752 | { | |
2753 | if (diff_unmodified_pair(p)) | |
2754 | return; | |
2755 | ||
2756 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
2757 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
2758 | return; /* no tree diffs in patch format */ | |
2759 | ||
2760 | run_diffstat(p, o, diffstat); | |
2761 | } | |
2762 | ||
88246898 JS |
2763 | static void diff_flush_checkdiff(struct diff_filepair *p, |
2764 | struct diff_options *o) | |
2765 | { | |
2766 | if (diff_unmodified_pair(p)) | |
2767 | return; | |
2768 | ||
2769 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
2770 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
2771 | return; /* no tree diffs in patch format */ | |
2772 | ||
2773 | run_checkdiff(p, o); | |
2774 | } | |
2775 | ||
6973dcae JH |
2776 | int diff_queue_is_empty(void) |
2777 | { | |
2778 | struct diff_queue_struct *q = &diff_queued_diff; | |
2779 | int i; | |
2780 | for (i = 0; i < q->nr; i++) | |
2781 | if (!diff_unmodified_pair(q->queue[i])) | |
2782 | return 0; | |
2783 | return 1; | |
2784 | } | |
2785 | ||
2786 | #if DIFF_DEBUG | |
2787 | void diff_debug_filespec(struct diff_filespec *s, int x, const char *one) | |
2788 | { | |
2789 | fprintf(stderr, "queue[%d] %s (%s) %s %06o %s\n", | |
2790 | x, one ? one : "", | |
2791 | s->path, | |
2792 | DIFF_FILE_VALID(s) ? "valid" : "invalid", | |
2793 | s->mode, | |
2794 | s->sha1_valid ? sha1_to_hex(s->sha1) : ""); | |
2795 | fprintf(stderr, "queue[%d] %s size %lu flags %d\n", | |
2796 | x, one ? one : "", | |
2797 | s->size, s->xfrm_flags); | |
2798 | } | |
2799 | ||
2800 | void diff_debug_filepair(const struct diff_filepair *p, int i) | |
2801 | { | |
2802 | diff_debug_filespec(p->one, i, "one"); | |
2803 | diff_debug_filespec(p->two, i, "two"); | |
64479711 | 2804 | fprintf(stderr, "score %d, status %c rename_used %d broken %d\n", |
6973dcae | 2805 | p->score, p->status ? p->status : '?', |
64479711 | 2806 | p->one->rename_used, p->broken_pair); |
6973dcae JH |
2807 | } |
2808 | ||
2809 | void diff_debug_queue(const char *msg, struct diff_queue_struct *q) | |
2810 | { | |
2811 | int i; | |
2812 | if (msg) | |
2813 | fprintf(stderr, "%s\n", msg); | |
2814 | fprintf(stderr, "q->nr = %d\n", q->nr); | |
2815 | for (i = 0; i < q->nr; i++) { | |
2816 | struct diff_filepair *p = q->queue[i]; | |
2817 | diff_debug_filepair(p, i); | |
2818 | } | |
2819 | } | |
2820 | #endif | |
2821 | ||
2822 | static void diff_resolve_rename_copy(void) | |
2823 | { | |
64479711 LT |
2824 | int i; |
2825 | struct diff_filepair *p; | |
6973dcae JH |
2826 | struct diff_queue_struct *q = &diff_queued_diff; |
2827 | ||
2828 | diff_debug_queue("resolve-rename-copy", q); | |
2829 | ||
2830 | for (i = 0; i < q->nr; i++) { | |
2831 | p = q->queue[i]; | |
2832 | p->status = 0; /* undecided */ | |
2833 | if (DIFF_PAIR_UNMERGED(p)) | |
2834 | p->status = DIFF_STATUS_UNMERGED; | |
2835 | else if (!DIFF_FILE_VALID(p->one)) | |
2836 | p->status = DIFF_STATUS_ADDED; | |
2837 | else if (!DIFF_FILE_VALID(p->two)) | |
2838 | p->status = DIFF_STATUS_DELETED; | |
2839 | else if (DIFF_PAIR_TYPE_CHANGED(p)) | |
2840 | p->status = DIFF_STATUS_TYPE_CHANGED; | |
2841 | ||
2842 | /* from this point on, we are dealing with a pair | |
2843 | * whose both sides are valid and of the same type, i.e. | |
2844 | * either in-place edit or rename/copy edit. | |
2845 | */ | |
2846 | else if (DIFF_PAIR_RENAME(p)) { | |
64479711 LT |
2847 | /* |
2848 | * A rename might have re-connected a broken | |
2849 | * pair up, causing the pathnames to be the | |
2850 | * same again. If so, that's not a rename at | |
2851 | * all, just a modification.. | |
2852 | * | |
2853 | * Otherwise, see if this source was used for | |
2854 | * multiple renames, in which case we decrement | |
2855 | * the count, and call it a copy. | |
6973dcae | 2856 | */ |
64479711 LT |
2857 | if (!strcmp(p->one->path, p->two->path)) |
2858 | p->status = DIFF_STATUS_MODIFIED; | |
2859 | else if (--p->one->rename_used > 0) | |
6973dcae | 2860 | p->status = DIFF_STATUS_COPIED; |
64479711 | 2861 | else |
6973dcae JH |
2862 | p->status = DIFF_STATUS_RENAMED; |
2863 | } | |
a89fccd2 | 2864 | else if (hashcmp(p->one->sha1, p->two->sha1) || |
d516c2d1 JS |
2865 | p->one->mode != p->two->mode || |
2866 | is_null_sha1(p->one->sha1)) | |
6973dcae JH |
2867 | p->status = DIFF_STATUS_MODIFIED; |
2868 | else { | |
2869 | /* This is a "no-change" entry and should not | |
2870 | * happen anymore, but prepare for broken callers. | |
2871 | */ | |
2872 | error("feeding unmodified %s to diffcore", | |
2873 | p->one->path); | |
2874 | p->status = DIFF_STATUS_UNKNOWN; | |
2875 | } | |
2876 | } | |
2877 | diff_debug_queue("resolve-rename-copy done", q); | |
2878 | } | |
2879 | ||
c6744349 | 2880 | static int check_pair_status(struct diff_filepair *p) |
6973dcae | 2881 | { |
6973dcae JH |
2882 | switch (p->status) { |
2883 | case DIFF_STATUS_UNKNOWN: | |
c6744349 | 2884 | return 0; |
6973dcae JH |
2885 | case 0: |
2886 | die("internal error in diff-resolve-rename-copy"); | |
6973dcae | 2887 | default: |
c6744349 | 2888 | return 1; |
6973dcae JH |
2889 | } |
2890 | } | |
2891 | ||
c6744349 TH |
2892 | static void flush_one_pair(struct diff_filepair *p, struct diff_options *opt) |
2893 | { | |
2894 | int fmt = opt->output_format; | |
2895 | ||
2896 | if (fmt & DIFF_FORMAT_CHECKDIFF) | |
2897 | diff_flush_checkdiff(p, opt); | |
2898 | else if (fmt & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS)) | |
2899 | diff_flush_raw(p, opt); | |
cd676a51 JH |
2900 | else if (fmt & DIFF_FORMAT_NAME) { |
2901 | const char *name_a, *name_b; | |
2902 | name_a = p->two->path; | |
2903 | name_b = NULL; | |
2904 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 | 2905 | write_name_quoted(name_a, opt->file, opt->line_termination); |
cd676a51 | 2906 | } |
c6744349 TH |
2907 | } |
2908 | ||
c0c77734 | 2909 | static void show_file_mode_name(FILE *file, const char *newdelete, struct diff_filespec *fs) |
4bbd261b SE |
2910 | { |
2911 | if (fs->mode) | |
c0c77734 | 2912 | fprintf(file, " %s mode %06o ", newdelete, fs->mode); |
4bbd261b | 2913 | else |
c0c77734 DB |
2914 | fprintf(file, " %s ", newdelete); |
2915 | write_name_quoted(fs->path, file, '\n'); | |
4bbd261b SE |
2916 | } |
2917 | ||
2918 | ||
c0c77734 | 2919 | static void show_mode_change(FILE *file, struct diff_filepair *p, int show_name) |
4bbd261b SE |
2920 | { |
2921 | if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) { | |
c0c77734 | 2922 | fprintf(file, " mode change %06o => %06o%c", p->one->mode, p->two->mode, |
663af342 | 2923 | show_name ? ' ' : '\n'); |
0d26a64e | 2924 | if (show_name) { |
c0c77734 | 2925 | write_name_quoted(p->two->path, file, '\n'); |
0d26a64e | 2926 | } |
4bbd261b SE |
2927 | } |
2928 | } | |
2929 | ||
c0c77734 | 2930 | static void show_rename_copy(FILE *file, const char *renamecopy, struct diff_filepair *p) |
4bbd261b | 2931 | { |
b9f44164 | 2932 | char *names = pprint_rename(p->one->path, p->two->path); |
4bbd261b | 2933 | |
c0c77734 | 2934 | fprintf(file, " %s %s (%d%%)\n", renamecopy, names, similarity_index(p)); |
b9f44164 | 2935 | free(names); |
c0c77734 | 2936 | show_mode_change(file, p, 0); |
4bbd261b SE |
2937 | } |
2938 | ||
c0c77734 | 2939 | static void diff_summary(FILE *file, struct diff_filepair *p) |
4bbd261b SE |
2940 | { |
2941 | switch(p->status) { | |
2942 | case DIFF_STATUS_DELETED: | |
c0c77734 | 2943 | show_file_mode_name(file, "delete", p->one); |
4bbd261b SE |
2944 | break; |
2945 | case DIFF_STATUS_ADDED: | |
c0c77734 | 2946 | show_file_mode_name(file, "create", p->two); |
4bbd261b SE |
2947 | break; |
2948 | case DIFF_STATUS_COPIED: | |
c0c77734 | 2949 | show_rename_copy(file, "copy", p); |
4bbd261b SE |
2950 | break; |
2951 | case DIFF_STATUS_RENAMED: | |
c0c77734 | 2952 | show_rename_copy(file, "rename", p); |
4bbd261b SE |
2953 | break; |
2954 | default: | |
2955 | if (p->score) { | |
c0c77734 DB |
2956 | fputs(" rewrite ", file); |
2957 | write_name_quoted(p->two->path, file, ' '); | |
2958 | fprintf(file, "(%d%%)\n", similarity_index(p)); | |
663af342 | 2959 | } |
c0c77734 | 2960 | show_mode_change(file, p, !p->score); |
4bbd261b SE |
2961 | break; |
2962 | } | |
2963 | } | |
2964 | ||
fcb3d0ad JS |
2965 | struct patch_id_t { |
2966 | struct xdiff_emit_state xm; | |
2967 | SHA_CTX *ctx; | |
2968 | int patchlen; | |
2969 | }; | |
2970 | ||
2971 | static int remove_space(char *line, int len) | |
2972 | { | |
2973 | int i; | |
663af342 PH |
2974 | char *dst = line; |
2975 | unsigned char c; | |
fcb3d0ad | 2976 | |
663af342 PH |
2977 | for (i = 0; i < len; i++) |
2978 | if (!isspace((c = line[i]))) | |
2979 | *dst++ = c; | |
fcb3d0ad | 2980 | |
663af342 | 2981 | return dst - line; |
fcb3d0ad JS |
2982 | } |
2983 | ||
2984 | static void patch_id_consume(void *priv, char *line, unsigned long len) | |
2985 | { | |
2986 | struct patch_id_t *data = priv; | |
2987 | int new_len; | |
2988 | ||
2989 | /* Ignore line numbers when computing the SHA1 of the patch */ | |
cc44c765 | 2990 | if (!prefixcmp(line, "@@ -")) |
fcb3d0ad JS |
2991 | return; |
2992 | ||
2993 | new_len = remove_space(line, len); | |
2994 | ||
2995 | SHA1_Update(data->ctx, line, new_len); | |
2996 | data->patchlen += new_len; | |
2997 | } | |
2998 | ||
2999 | /* returns 0 upon success, and writes result into sha1 */ | |
3000 | static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1) | |
3001 | { | |
3002 | struct diff_queue_struct *q = &diff_queued_diff; | |
3003 | int i; | |
3004 | SHA_CTX ctx; | |
3005 | struct patch_id_t data; | |
3006 | char buffer[PATH_MAX * 4 + 20]; | |
3007 | ||
3008 | SHA1_Init(&ctx); | |
3009 | memset(&data, 0, sizeof(struct patch_id_t)); | |
3010 | data.ctx = &ctx; | |
3011 | data.xm.consume = patch_id_consume; | |
3012 | ||
3013 | for (i = 0; i < q->nr; i++) { | |
3014 | xpparam_t xpp; | |
3015 | xdemitconf_t xecfg; | |
3016 | xdemitcb_t ecb; | |
3017 | mmfile_t mf1, mf2; | |
3018 | struct diff_filepair *p = q->queue[i]; | |
3019 | int len1, len2; | |
3020 | ||
30b25010 | 3021 | memset(&xecfg, 0, sizeof(xecfg)); |
fcb3d0ad JS |
3022 | if (p->status == 0) |
3023 | return error("internal diff status error"); | |
3024 | if (p->status == DIFF_STATUS_UNKNOWN) | |
3025 | continue; | |
3026 | if (diff_unmodified_pair(p)) | |
3027 | continue; | |
3028 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
3029 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
3030 | continue; | |
3031 | if (DIFF_PAIR_UNMERGED(p)) | |
3032 | continue; | |
3033 | ||
3034 | diff_fill_sha1_info(p->one); | |
3035 | diff_fill_sha1_info(p->two); | |
3036 | if (fill_mmfile(&mf1, p->one) < 0 || | |
3037 | fill_mmfile(&mf2, p->two) < 0) | |
3038 | return error("unable to read files to diff"); | |
3039 | ||
fcb3d0ad JS |
3040 | len1 = remove_space(p->one->path, strlen(p->one->path)); |
3041 | len2 = remove_space(p->two->path, strlen(p->two->path)); | |
3042 | if (p->one->mode == 0) | |
3043 | len1 = snprintf(buffer, sizeof(buffer), | |
3044 | "diff--gita/%.*sb/%.*s" | |
3045 | "newfilemode%06o" | |
3046 | "---/dev/null" | |
3047 | "+++b/%.*s", | |
3048 | len1, p->one->path, | |
3049 | len2, p->two->path, | |
3050 | p->two->mode, | |
3051 | len2, p->two->path); | |
3052 | else if (p->two->mode == 0) | |
3053 | len1 = snprintf(buffer, sizeof(buffer), | |
3054 | "diff--gita/%.*sb/%.*s" | |
3055 | "deletedfilemode%06o" | |
3056 | "---a/%.*s" | |
3057 | "+++/dev/null", | |
3058 | len1, p->one->path, | |
3059 | len2, p->two->path, | |
3060 | p->one->mode, | |
3061 | len1, p->one->path); | |
3062 | else | |
3063 | len1 = snprintf(buffer, sizeof(buffer), | |
3064 | "diff--gita/%.*sb/%.*s" | |
3065 | "---a/%.*s" | |
3066 | "+++b/%.*s", | |
3067 | len1, p->one->path, | |
3068 | len2, p->two->path, | |
3069 | len1, p->one->path, | |
3070 | len2, p->two->path); | |
3071 | SHA1_Update(&ctx, buffer, len1); | |
3072 | ||
3073 | xpp.flags = XDF_NEED_MINIMAL; | |
3074 | xecfg.ctxlen = 3; | |
9fdc3bb5 | 3075 | xecfg.flags = XDL_EMIT_FUNCNAMES; |
fcb3d0ad JS |
3076 | ecb.outf = xdiff_outf; |
3077 | ecb.priv = &data; | |
c279d7e9 | 3078 | xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); |
fcb3d0ad JS |
3079 | } |
3080 | ||
3081 | SHA1_Final(sha1, &ctx); | |
3082 | return 0; | |
3083 | } | |
3084 | ||
3085 | int diff_flush_patch_id(struct diff_options *options, unsigned char *sha1) | |
3086 | { | |
3087 | struct diff_queue_struct *q = &diff_queued_diff; | |
3088 | int i; | |
3089 | int result = diff_get_patch_id(options, sha1); | |
3090 | ||
3091 | for (i = 0; i < q->nr; i++) | |
3092 | diff_free_filepair(q->queue[i]); | |
3093 | ||
3094 | free(q->queue); | |
3095 | q->queue = NULL; | |
3096 | q->nr = q->alloc = 0; | |
3097 | ||
3098 | return result; | |
3099 | } | |
3100 | ||
946c3784 | 3101 | static int is_summary_empty(const struct diff_queue_struct *q) |
6973dcae | 3102 | { |
6973dcae | 3103 | int i; |
6973dcae | 3104 | |
946c3784 TH |
3105 | for (i = 0; i < q->nr; i++) { |
3106 | const struct diff_filepair *p = q->queue[i]; | |
3107 | ||
3108 | switch (p->status) { | |
3109 | case DIFF_STATUS_DELETED: | |
3110 | case DIFF_STATUS_ADDED: | |
3111 | case DIFF_STATUS_COPIED: | |
3112 | case DIFF_STATUS_RENAMED: | |
3113 | return 0; | |
3114 | default: | |
3115 | if (p->score) | |
3116 | return 0; | |
3117 | if (p->one->mode && p->two->mode && | |
3118 | p->one->mode != p->two->mode) | |
3119 | return 0; | |
3120 | break; | |
3121 | } | |
6973dcae | 3122 | } |
946c3784 TH |
3123 | return 1; |
3124 | } | |
3125 | ||
6973dcae JH |
3126 | void diff_flush(struct diff_options *options) |
3127 | { | |
3128 | struct diff_queue_struct *q = &diff_queued_diff; | |
c6744349 | 3129 | int i, output_format = options->output_format; |
946c3784 | 3130 | int separator = 0; |
6973dcae | 3131 | |
c6744349 TH |
3132 | /* |
3133 | * Order: raw, stat, summary, patch | |
3134 | * or: name/name-status/checkdiff (other bits clear) | |
3135 | */ | |
946c3784 TH |
3136 | if (!q->nr) |
3137 | goto free_queue; | |
6973dcae | 3138 | |
c6744349 TH |
3139 | if (output_format & (DIFF_FORMAT_RAW | |
3140 | DIFF_FORMAT_NAME | | |
3141 | DIFF_FORMAT_NAME_STATUS | | |
3142 | DIFF_FORMAT_CHECKDIFF)) { | |
6973dcae JH |
3143 | for (i = 0; i < q->nr; i++) { |
3144 | struct diff_filepair *p = q->queue[i]; | |
c6744349 TH |
3145 | if (check_pair_status(p)) |
3146 | flush_one_pair(p, options); | |
6973dcae | 3147 | } |
946c3784 | 3148 | separator++; |
6973dcae | 3149 | } |
c6744349 | 3150 | |
c04a7155 | 3151 | if (output_format & (DIFF_FORMAT_DIFFSTAT|DIFF_FORMAT_SHORTSTAT|DIFF_FORMAT_NUMSTAT)) { |
5e2b0636 | 3152 | struct diffstat_t diffstat; |
c6744349 | 3153 | |
5e2b0636 TH |
3154 | memset(&diffstat, 0, sizeof(struct diffstat_t)); |
3155 | diffstat.xm.consume = diffstat_consume; | |
6973dcae JH |
3156 | for (i = 0; i < q->nr; i++) { |
3157 | struct diff_filepair *p = q->queue[i]; | |
c6744349 | 3158 | if (check_pair_status(p)) |
5e2b0636 | 3159 | diff_flush_stat(p, options, &diffstat); |
6973dcae | 3160 | } |
74e2abe5 JH |
3161 | if (output_format & DIFF_FORMAT_NUMSTAT) |
3162 | show_numstat(&diffstat, options); | |
3163 | if (output_format & DIFF_FORMAT_DIFFSTAT) | |
3164 | show_stats(&diffstat, options); | |
f604652e | 3165 | if (output_format & DIFF_FORMAT_SHORTSTAT) |
c0c77734 | 3166 | show_shortstats(&diffstat, options); |
f604652e | 3167 | free_diffstat_info(&diffstat); |
3969cf7d | 3168 | separator++; |
6973dcae | 3169 | } |
c04a7155 JH |
3170 | if (output_format & DIFF_FORMAT_DIRSTAT) |
3171 | show_dirstat(options); | |
6973dcae | 3172 | |
946c3784 | 3173 | if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) { |
c6744349 | 3174 | for (i = 0; i < q->nr; i++) |
c0c77734 | 3175 | diff_summary(options->file, q->queue[i]); |
3969cf7d | 3176 | separator++; |
6973dcae JH |
3177 | } |
3178 | ||
c6744349 | 3179 | if (output_format & DIFF_FORMAT_PATCH) { |
946c3784 TH |
3180 | if (separator) { |
3181 | if (options->stat_sep) { | |
3182 | /* attach patch instead of inline */ | |
c0c77734 | 3183 | fputs(options->stat_sep, options->file); |
946c3784 | 3184 | } else { |
c0c77734 | 3185 | putc(options->line_termination, options->file); |
946c3784 | 3186 | } |
c6744349 TH |
3187 | } |
3188 | ||
3189 | for (i = 0; i < q->nr; i++) { | |
3190 | struct diff_filepair *p = q->queue[i]; | |
3191 | if (check_pair_status(p)) | |
3192 | diff_flush_patch(p, options); | |
3193 | } | |
4bbd261b SE |
3194 | } |
3195 | ||
04245581 JK |
3196 | if (output_format & DIFF_FORMAT_CALLBACK) |
3197 | options->format_callback(q, options, options->format_callback_data); | |
3198 | ||
c6744349 TH |
3199 | for (i = 0; i < q->nr; i++) |
3200 | diff_free_filepair(q->queue[i]); | |
946c3784 | 3201 | free_queue: |
6973dcae JH |
3202 | free(q->queue); |
3203 | q->queue = NULL; | |
3204 | q->nr = q->alloc = 0; | |
c0c77734 DB |
3205 | if (options->close_file) |
3206 | fclose(options->file); | |
6973dcae JH |
3207 | } |
3208 | ||
3209 | static void diffcore_apply_filter(const char *filter) | |
3210 | { | |
3211 | int i; | |
3212 | struct diff_queue_struct *q = &diff_queued_diff; | |
3213 | struct diff_queue_struct outq; | |
3214 | outq.queue = NULL; | |
3215 | outq.nr = outq.alloc = 0; | |
3216 | ||
3217 | if (!filter) | |
3218 | return; | |
3219 | ||
3220 | if (strchr(filter, DIFF_STATUS_FILTER_AON)) { | |
3221 | int found; | |
3222 | for (i = found = 0; !found && i < q->nr; i++) { | |
3223 | struct diff_filepair *p = q->queue[i]; | |
3224 | if (((p->status == DIFF_STATUS_MODIFIED) && | |
3225 | ((p->score && | |
3226 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
3227 | (!p->score && | |
3228 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
3229 | ((p->status != DIFF_STATUS_MODIFIED) && | |
3230 | strchr(filter, p->status))) | |
3231 | found++; | |
3232 | } | |
3233 | if (found) | |
3234 | return; | |
3235 | ||
3236 | /* otherwise we will clear the whole queue | |
3237 | * by copying the empty outq at the end of this | |
3238 | * function, but first clear the current entries | |
3239 | * in the queue. | |
3240 | */ | |
3241 | for (i = 0; i < q->nr; i++) | |
3242 | diff_free_filepair(q->queue[i]); | |
3243 | } | |
3244 | else { | |
3245 | /* Only the matching ones */ | |
3246 | for (i = 0; i < q->nr; i++) { | |
3247 | struct diff_filepair *p = q->queue[i]; | |
3248 | ||
3249 | if (((p->status == DIFF_STATUS_MODIFIED) && | |
3250 | ((p->score && | |
3251 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
3252 | (!p->score && | |
3253 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
3254 | ((p->status != DIFF_STATUS_MODIFIED) && | |
3255 | strchr(filter, p->status))) | |
3256 | diff_q(&outq, p); | |
3257 | else | |
3258 | diff_free_filepair(p); | |
3259 | } | |
3260 | } | |
3261 | free(q->queue); | |
3262 | *q = outq; | |
3263 | } | |
3264 | ||
5701115a SV |
3265 | /* Check whether two filespecs with the same mode and size are identical */ |
3266 | static int diff_filespec_is_identical(struct diff_filespec *one, | |
3267 | struct diff_filespec *two) | |
3268 | { | |
2b459b48 JH |
3269 | if (S_ISGITLINK(one->mode)) |
3270 | return 0; | |
5701115a SV |
3271 | if (diff_populate_filespec(one, 0)) |
3272 | return 0; | |
3273 | if (diff_populate_filespec(two, 0)) | |
3274 | return 0; | |
3275 | return !memcmp(one->data, two->data, one->size); | |
3276 | } | |
3277 | ||
fb13227e JH |
3278 | static void diffcore_skip_stat_unmatch(struct diff_options *diffopt) |
3279 | { | |
3280 | int i; | |
3281 | struct diff_queue_struct *q = &diff_queued_diff; | |
3282 | struct diff_queue_struct outq; | |
3283 | outq.queue = NULL; | |
3284 | outq.nr = outq.alloc = 0; | |
3285 | ||
3286 | for (i = 0; i < q->nr; i++) { | |
3287 | struct diff_filepair *p = q->queue[i]; | |
3288 | ||
3289 | /* | |
3290 | * 1. Entries that come from stat info dirtyness | |
3291 | * always have both sides (iow, not create/delete), | |
3292 | * one side of the object name is unknown, with | |
3293 | * the same mode and size. Keep the ones that | |
3294 | * do not match these criteria. They have real | |
3295 | * differences. | |
3296 | * | |
3297 | * 2. At this point, the file is known to be modified, | |
3298 | * with the same mode and size, and the object | |
3299 | * name of one side is unknown. Need to inspect | |
3300 | * the identical contents. | |
3301 | */ | |
3302 | if (!DIFF_FILE_VALID(p->one) || /* (1) */ | |
3303 | !DIFF_FILE_VALID(p->two) || | |
3304 | (p->one->sha1_valid && p->two->sha1_valid) || | |
3305 | (p->one->mode != p->two->mode) || | |
3306 | diff_populate_filespec(p->one, 1) || | |
3307 | diff_populate_filespec(p->two, 1) || | |
3308 | (p->one->size != p->two->size) || | |
5701115a | 3309 | !diff_filespec_is_identical(p->one, p->two)) /* (2) */ |
fb13227e JH |
3310 | diff_q(&outq, p); |
3311 | else { | |
3312 | /* | |
3313 | * The caller can subtract 1 from skip_stat_unmatch | |
3314 | * to determine how many paths were dirty only | |
3315 | * due to stat info mismatch. | |
3316 | */ | |
8f67f8ae | 3317 | if (!DIFF_OPT_TST(diffopt, NO_INDEX)) |
6d2d9e86 | 3318 | diffopt->skip_stat_unmatch++; |
fb13227e JH |
3319 | diff_free_filepair(p); |
3320 | } | |
3321 | } | |
3322 | free(q->queue); | |
3323 | *q = outq; | |
3324 | } | |
3325 | ||
6973dcae JH |
3326 | void diffcore_std(struct diff_options *options) |
3327 | { | |
8f67f8ae | 3328 | if (DIFF_OPT_TST(options, QUIET)) |
68aacb2f | 3329 | return; |
706098af | 3330 | |
8f67f8ae | 3331 | if (options->skip_stat_unmatch && !DIFF_OPT_TST(options, FIND_COPIES_HARDER)) |
fb13227e | 3332 | diffcore_skip_stat_unmatch(options); |
6973dcae JH |
3333 | if (options->break_opt != -1) |
3334 | diffcore_break(options->break_opt); | |
3335 | if (options->detect_rename) | |
3336 | diffcore_rename(options); | |
3337 | if (options->break_opt != -1) | |
3338 | diffcore_merge_broken(); | |
3339 | if (options->pickaxe) | |
3340 | diffcore_pickaxe(options->pickaxe, options->pickaxe_opts); | |
3341 | if (options->orderfile) | |
3342 | diffcore_order(options->orderfile); | |
3343 | diff_resolve_rename_copy(); | |
3344 | diffcore_apply_filter(options->filter); | |
68aacb2f | 3345 | |
8f67f8ae PH |
3346 | if (diff_queued_diff.nr) |
3347 | DIFF_OPT_SET(options, HAS_CHANGES); | |
3348 | else | |
3349 | DIFF_OPT_CLR(options, HAS_CHANGES); | |
6973dcae JH |
3350 | } |
3351 | ||
da31b358 JH |
3352 | int diff_result_code(struct diff_options *opt, int status) |
3353 | { | |
3354 | int result = 0; | |
3355 | if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && | |
3356 | !(opt->output_format & DIFF_FORMAT_CHECKDIFF)) | |
3357 | return status; | |
3358 | if (DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && | |
3359 | DIFF_OPT_TST(opt, HAS_CHANGES)) | |
3360 | result |= 01; | |
3361 | if ((opt->output_format & DIFF_FORMAT_CHECKDIFF) && | |
3362 | DIFF_OPT_TST(opt, CHECK_FAILED)) | |
3363 | result |= 02; | |
3364 | return result; | |
3365 | } | |
6973dcae | 3366 | |
6973dcae JH |
3367 | void diff_addremove(struct diff_options *options, |
3368 | int addremove, unsigned mode, | |
3369 | const unsigned char *sha1, | |
3370 | const char *base, const char *path) | |
3371 | { | |
3372 | char concatpath[PATH_MAX]; | |
3373 | struct diff_filespec *one, *two; | |
3374 | ||
50fd9bd8 JS |
3375 | if (DIFF_OPT_TST(options, IGNORE_SUBMODULES) && S_ISGITLINK(mode)) |
3376 | return; | |
3377 | ||
6973dcae JH |
3378 | /* This may look odd, but it is a preparation for |
3379 | * feeding "there are unchanged files which should | |
3380 | * not produce diffs, but when you are doing copy | |
3381 | * detection you would need them, so here they are" | |
3382 | * entries to the diff-core. They will be prefixed | |
3383 | * with something like '=' or '*' (I haven't decided | |
3384 | * which but should not make any difference). | |
a6080a0a | 3385 | * Feeding the same new and old to diff_change() |
6973dcae JH |
3386 | * also has the same effect. |
3387 | * Before the final output happens, they are pruned after | |
3388 | * merged into rename/copy pairs as appropriate. | |
3389 | */ | |
8f67f8ae | 3390 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) |
6973dcae JH |
3391 | addremove = (addremove == '+' ? '-' : |
3392 | addremove == '-' ? '+' : addremove); | |
3393 | ||
3394 | if (!path) path = ""; | |
3395 | sprintf(concatpath, "%s%s", base, path); | |
cd676a51 JH |
3396 | |
3397 | if (options->prefix && | |
3398 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
3399 | return; | |
3400 | ||
6973dcae JH |
3401 | one = alloc_filespec(concatpath); |
3402 | two = alloc_filespec(concatpath); | |
3403 | ||
3404 | if (addremove != '+') | |
3405 | fill_filespec(one, sha1, mode); | |
3406 | if (addremove != '-') | |
3407 | fill_filespec(two, sha1, mode); | |
3408 | ||
3409 | diff_queue(&diff_queued_diff, one, two); | |
8f67f8ae | 3410 | DIFF_OPT_SET(options, HAS_CHANGES); |
6973dcae JH |
3411 | } |
3412 | ||
3413 | void diff_change(struct diff_options *options, | |
3414 | unsigned old_mode, unsigned new_mode, | |
3415 | const unsigned char *old_sha1, | |
3416 | const unsigned char *new_sha1, | |
a6080a0a | 3417 | const char *base, const char *path) |
6973dcae JH |
3418 | { |
3419 | char concatpath[PATH_MAX]; | |
3420 | struct diff_filespec *one, *two; | |
3421 | ||
50fd9bd8 JS |
3422 | if (DIFF_OPT_TST(options, IGNORE_SUBMODULES) && S_ISGITLINK(old_mode) |
3423 | && S_ISGITLINK(new_mode)) | |
3424 | return; | |
3425 | ||
8f67f8ae | 3426 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) { |
6973dcae JH |
3427 | unsigned tmp; |
3428 | const unsigned char *tmp_c; | |
3429 | tmp = old_mode; old_mode = new_mode; new_mode = tmp; | |
3430 | tmp_c = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_c; | |
3431 | } | |
3432 | if (!path) path = ""; | |
3433 | sprintf(concatpath, "%s%s", base, path); | |
cd676a51 JH |
3434 | |
3435 | if (options->prefix && | |
3436 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
3437 | return; | |
3438 | ||
6973dcae JH |
3439 | one = alloc_filespec(concatpath); |
3440 | two = alloc_filespec(concatpath); | |
3441 | fill_filespec(one, old_sha1, old_mode); | |
3442 | fill_filespec(two, new_sha1, new_mode); | |
3443 | ||
3444 | diff_queue(&diff_queued_diff, one, two); | |
8f67f8ae | 3445 | DIFF_OPT_SET(options, HAS_CHANGES); |
6973dcae JH |
3446 | } |
3447 | ||
3448 | void diff_unmerge(struct diff_options *options, | |
e9c84099 JH |
3449 | const char *path, |
3450 | unsigned mode, const unsigned char *sha1) | |
6973dcae JH |
3451 | { |
3452 | struct diff_filespec *one, *two; | |
cd676a51 JH |
3453 | |
3454 | if (options->prefix && | |
3455 | strncmp(path, options->prefix, options->prefix_length)) | |
3456 | return; | |
3457 | ||
6973dcae JH |
3458 | one = alloc_filespec(path); |
3459 | two = alloc_filespec(path); | |
e9c84099 JH |
3460 | fill_filespec(one, sha1, mode); |
3461 | diff_queue(&diff_queued_diff, one, two)->is_unmerged = 1; | |
6973dcae | 3462 | } |