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Commit | Line | Data |
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10bea152 JS |
1 | /* |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | * Copyright (C) Johannes Schindelin, 2005 | |
6 | * | |
7 | */ | |
17712991 | 8 | #include "cache.h" |
7f0e39fa | 9 | #include "exec_cmd.h" |
17712991 LT |
10 | |
11 | #define MAXNAME (256) | |
12 | ||
13 | static FILE *config_file; | |
0dccc7dc | 14 | static const char *config_file_name; |
17712991 | 15 | static int config_linenr; |
960ccca6 DH |
16 | static int zlib_compression_seen; |
17 | ||
17712991 LT |
18 | static int get_next_char(void) |
19 | { | |
20 | int c; | |
21 | FILE *f; | |
22 | ||
23 | c = '\n'; | |
24 | if ((f = config_file) != NULL) { | |
25 | c = fgetc(f); | |
db2c075d JH |
26 | if (c == '\r') { |
27 | /* DOS like systems */ | |
28 | c = fgetc(f); | |
29 | if (c != '\n') { | |
30 | ungetc(c, f); | |
31 | c = '\r'; | |
32 | } | |
33 | } | |
17712991 LT |
34 | if (c == '\n') |
35 | config_linenr++; | |
36 | if (c == EOF) { | |
37 | config_file = NULL; | |
38 | c = '\n'; | |
39 | } | |
40 | } | |
41 | return c; | |
42 | } | |
43 | ||
44 | static char *parse_value(void) | |
45 | { | |
46 | static char value[1024]; | |
47 | int quote = 0, comment = 0, len = 0, space = 0; | |
48 | ||
49 | for (;;) { | |
50 | int c = get_next_char(); | |
51 | if (len >= sizeof(value)) | |
52 | return NULL; | |
53 | if (c == '\n') { | |
54 | if (quote) | |
55 | return NULL; | |
56 | value[len] = 0; | |
57 | return value; | |
58 | } | |
59 | if (comment) | |
60 | continue; | |
61 | if (isspace(c) && !quote) { | |
62 | space = 1; | |
63 | continue; | |
64 | } | |
7ebdba61 JS |
65 | if (!quote) { |
66 | if (c == ';' || c == '#') { | |
67 | comment = 1; | |
68 | continue; | |
69 | } | |
70 | } | |
17712991 LT |
71 | if (space) { |
72 | if (len) | |
73 | value[len++] = ' '; | |
74 | space = 0; | |
75 | } | |
76 | if (c == '\\') { | |
77 | c = get_next_char(); | |
78 | switch (c) { | |
79 | case '\n': | |
80 | continue; | |
81 | case 't': | |
82 | c = '\t'; | |
83 | break; | |
84 | case 'b': | |
85 | c = '\b'; | |
86 | break; | |
87 | case 'n': | |
88 | c = '\n'; | |
89 | break; | |
5cbb401d LT |
90 | /* Some characters escape as themselves */ |
91 | case '\\': case '"': | |
92 | break; | |
93 | /* Reject unknown escape sequences */ | |
94 | default: | |
95 | return NULL; | |
17712991 LT |
96 | } |
97 | value[len++] = c; | |
98 | continue; | |
99 | } | |
100 | if (c == '"') { | |
101 | quote = 1-quote; | |
102 | continue; | |
103 | } | |
17712991 LT |
104 | value[len++] = c; |
105 | } | |
106 | } | |
107 | ||
38c5afa8 LT |
108 | static inline int iskeychar(int c) |
109 | { | |
110 | return isalnum(c) || c == '-'; | |
111 | } | |
112 | ||
17712991 LT |
113 | static int get_value(config_fn_t fn, char *name, unsigned int len) |
114 | { | |
115 | int c; | |
116 | char *value; | |
117 | ||
118 | /* Get the full name */ | |
119 | for (;;) { | |
120 | c = get_next_char(); | |
121 | if (c == EOF) | |
122 | break; | |
38c5afa8 | 123 | if (!iskeychar(c)) |
17712991 LT |
124 | break; |
125 | name[len++] = tolower(c); | |
126 | if (len >= MAXNAME) | |
127 | return -1; | |
128 | } | |
129 | name[len] = 0; | |
130 | while (c == ' ' || c == '\t') | |
131 | c = get_next_char(); | |
132 | ||
133 | value = NULL; | |
134 | if (c != '\n') { | |
135 | if (c != '=') | |
136 | return -1; | |
137 | value = parse_value(); | |
138 | if (!value) | |
139 | return -1; | |
140 | } | |
141 | return fn(name, value); | |
142 | } | |
143 | ||
d14f7764 LT |
144 | static int get_extended_base_var(char *name, int baselen, int c) |
145 | { | |
146 | do { | |
147 | if (c == '\n') | |
148 | return -1; | |
149 | c = get_next_char(); | |
150 | } while (isspace(c)); | |
151 | ||
152 | /* We require the format to be '[base "extension"]' */ | |
153 | if (c != '"') | |
154 | return -1; | |
155 | name[baselen++] = '.'; | |
156 | ||
157 | for (;;) { | |
158 | int c = get_next_char(); | |
159 | if (c == '\n') | |
160 | return -1; | |
161 | if (c == '"') | |
162 | break; | |
163 | if (c == '\\') { | |
164 | c = get_next_char(); | |
165 | if (c == '\n') | |
166 | return -1; | |
167 | } | |
168 | name[baselen++] = c; | |
169 | if (baselen > MAXNAME / 2) | |
170 | return -1; | |
171 | } | |
172 | ||
173 | /* Final ']' */ | |
174 | if (get_next_char() != ']') | |
175 | return -1; | |
176 | return baselen; | |
177 | } | |
178 | ||
17712991 LT |
179 | static int get_base_var(char *name) |
180 | { | |
181 | int baselen = 0; | |
182 | ||
183 | for (;;) { | |
184 | int c = get_next_char(); | |
185 | if (c == EOF) | |
186 | return -1; | |
187 | if (c == ']') | |
188 | return baselen; | |
d14f7764 LT |
189 | if (isspace(c)) |
190 | return get_extended_base_var(name, baselen, c); | |
38c5afa8 | 191 | if (!iskeychar(c) && c != '.') |
17712991 LT |
192 | return -1; |
193 | if (baselen > MAXNAME / 2) | |
194 | return -1; | |
195 | name[baselen++] = tolower(c); | |
196 | } | |
197 | } | |
198 | ||
199 | static int git_parse_file(config_fn_t fn) | |
200 | { | |
201 | int comment = 0; | |
202 | int baselen = 0; | |
203 | static char var[MAXNAME]; | |
204 | ||
205 | for (;;) { | |
206 | int c = get_next_char(); | |
207 | if (c == '\n') { | |
208 | /* EOF? */ | |
209 | if (!config_file) | |
210 | return 0; | |
211 | comment = 0; | |
212 | continue; | |
213 | } | |
214 | if (comment || isspace(c)) | |
215 | continue; | |
216 | if (c == '#' || c == ';') { | |
217 | comment = 1; | |
218 | continue; | |
219 | } | |
220 | if (c == '[') { | |
221 | baselen = get_base_var(var); | |
222 | if (baselen <= 0) | |
223 | break; | |
224 | var[baselen++] = '.'; | |
225 | var[baselen] = 0; | |
226 | continue; | |
227 | } | |
228 | if (!isalpha(c)) | |
229 | break; | |
128af9d1 | 230 | var[baselen] = tolower(c); |
17712991 LT |
231 | if (get_value(fn, var, baselen+1) < 0) |
232 | break; | |
233 | } | |
4f629539 | 234 | die("bad config file line %d in %s", config_linenr, config_file_name); |
17712991 LT |
235 | } |
236 | ||
0b87b6e0 BD |
237 | static unsigned long get_unit_factor(const char *end) |
238 | { | |
239 | if (!*end) | |
240 | return 1; | |
241 | else if (!strcasecmp(end, "k")) | |
242 | return 1024; | |
243 | else if (!strcasecmp(end, "m")) | |
244 | return 1024 * 1024; | |
245 | else if (!strcasecmp(end, "g")) | |
246 | return 1024 * 1024 * 1024; | |
247 | die("unknown unit: '%s'", end); | |
248 | } | |
249 | ||
250 | int git_parse_long(const char *value, long *ret) | |
251 | { | |
252 | if (value && *value) { | |
253 | char *end; | |
254 | long val = strtol(value, &end, 0); | |
255 | *ret = val * get_unit_factor(end); | |
256 | return 1; | |
257 | } | |
258 | return 0; | |
259 | } | |
260 | ||
261 | int git_parse_ulong(const char *value, unsigned long *ret) | |
17712991 LT |
262 | { |
263 | if (value && *value) { | |
264 | char *end; | |
0b87b6e0 BD |
265 | unsigned long val = strtoul(value, &end, 0); |
266 | *ret = val * get_unit_factor(end); | |
267 | return 1; | |
17712991 | 268 | } |
0b87b6e0 BD |
269 | return 0; |
270 | } | |
271 | ||
272 | int git_config_int(const char *name, const char *value) | |
273 | { | |
274 | long ret; | |
275 | if (!git_parse_long(value, &ret)) | |
276 | die("bad config value for '%s' in %s", name, config_file_name); | |
277 | return ret; | |
278 | } | |
279 | ||
280 | unsigned long git_config_ulong(const char *name, const char *value) | |
281 | { | |
282 | unsigned long ret; | |
283 | if (!git_parse_ulong(value, &ret)) | |
284 | die("bad config value for '%s' in %s", name, config_file_name); | |
285 | return ret; | |
17712991 LT |
286 | } |
287 | ||
288 | int git_config_bool(const char *name, const char *value) | |
289 | { | |
290 | if (!value) | |
291 | return 1; | |
292 | if (!*value) | |
293 | return 0; | |
624314fd | 294 | if (!strcasecmp(value, "true") || !strcasecmp(value, "yes")) |
17712991 | 295 | return 1; |
624314fd | 296 | if (!strcasecmp(value, "false") || !strcasecmp(value, "no")) |
17712991 LT |
297 | return 0; |
298 | return git_config_int(name, value) != 0; | |
299 | } | |
300 | ||
301 | int git_default_config(const char *var, const char *value) | |
302 | { | |
303 | /* This needs a better name */ | |
304 | if (!strcmp(var, "core.filemode")) { | |
305 | trust_executable_bit = git_config_bool(var, value); | |
306 | return 0; | |
307 | } | |
308 | ||
9378c161 JH |
309 | if (!strcmp(var, "core.quotepath")) { |
310 | quote_path_fully = git_config_bool(var, value); | |
311 | return 0; | |
312 | } | |
313 | ||
78a8d641 JS |
314 | if (!strcmp(var, "core.symlinks")) { |
315 | has_symlinks = git_config_bool(var, value); | |
316 | return 0; | |
317 | } | |
318 | ||
7d1864ce JH |
319 | if (!strcmp(var, "core.bare")) { |
320 | is_bare_repository_cfg = git_config_bool(var, value); | |
321 | return 0; | |
322 | } | |
323 | ||
5f73076c JH |
324 | if (!strcmp(var, "core.ignorestat")) { |
325 | assume_unchanged = git_config_bool(var, value); | |
326 | return 0; | |
327 | } | |
328 | ||
e388c738 JH |
329 | if (!strcmp(var, "core.prefersymlinkrefs")) { |
330 | prefer_symlink_refs = git_config_bool(var, value); | |
f8348be3 JS |
331 | return 0; |
332 | } | |
333 | ||
6de08ae6 SP |
334 | if (!strcmp(var, "core.logallrefupdates")) { |
335 | log_all_ref_updates = git_config_bool(var, value); | |
336 | return 0; | |
337 | } | |
338 | ||
2f8acdb3 JH |
339 | if (!strcmp(var, "core.warnambiguousrefs")) { |
340 | warn_ambiguous_refs = git_config_bool(var, value); | |
341 | return 0; | |
342 | } | |
343 | ||
960ccca6 | 344 | if (!strcmp(var, "core.loosecompression")) { |
12f6c308 JBH |
345 | int level = git_config_int(var, value); |
346 | if (level == -1) | |
347 | level = Z_DEFAULT_COMPRESSION; | |
348 | else if (level < 0 || level > Z_BEST_COMPRESSION) | |
349 | die("bad zlib compression level %d", level); | |
350 | zlib_compression_level = level; | |
960ccca6 DH |
351 | zlib_compression_seen = 1; |
352 | return 0; | |
353 | } | |
354 | ||
355 | if (!strcmp(var, "core.compression")) { | |
356 | int level = git_config_int(var, value); | |
357 | if (level == -1) | |
358 | level = Z_DEFAULT_COMPRESSION; | |
359 | else if (level < 0 || level > Z_BEST_COMPRESSION) | |
360 | die("bad zlib compression level %d", level); | |
361 | core_compression_level = level; | |
362 | core_compression_seen = 1; | |
363 | if (!zlib_compression_seen) | |
364 | zlib_compression_level = level; | |
12f6c308 JBH |
365 | return 0; |
366 | } | |
367 | ||
60bb8b14 | 368 | if (!strcmp(var, "core.packedgitwindowsize")) { |
5faaf246 | 369 | int pgsz_x2 = getpagesize() * 2; |
60bb8b14 | 370 | packed_git_window_size = git_config_int(var, value); |
5faaf246 JH |
371 | |
372 | /* This value must be multiple of (pagesize * 2) */ | |
373 | packed_git_window_size /= pgsz_x2; | |
374 | if (packed_git_window_size < 1) | |
375 | packed_git_window_size = 1; | |
376 | packed_git_window_size *= pgsz_x2; | |
60bb8b14 SP |
377 | return 0; |
378 | } | |
379 | ||
77ccc5bb SP |
380 | if (!strcmp(var, "core.packedgitlimit")) { |
381 | packed_git_limit = git_config_int(var, value); | |
382 | return 0; | |
383 | } | |
384 | ||
18bdec11 SP |
385 | if (!strcmp(var, "core.deltabasecachelimit")) { |
386 | delta_base_cache_limit = git_config_int(var, value); | |
387 | return 0; | |
388 | } | |
389 | ||
6c510bee | 390 | if (!strcmp(var, "core.autocrlf")) { |
d7f46334 LT |
391 | if (value && !strcasecmp(value, "input")) { |
392 | auto_crlf = -1; | |
393 | return 0; | |
394 | } | |
6c510bee LT |
395 | auto_crlf = git_config_bool(var, value); |
396 | return 0; | |
397 | } | |
398 | ||
e1b10391 | 399 | if (!strcmp(var, "user.name")) { |
817151e6 | 400 | strlcpy(git_default_name, value, sizeof(git_default_name)); |
e1b10391 LT |
401 | return 0; |
402 | } | |
403 | ||
404 | if (!strcmp(var, "user.email")) { | |
817151e6 | 405 | strlcpy(git_default_email, value, sizeof(git_default_email)); |
e1b10391 LT |
406 | return 0; |
407 | } | |
408 | ||
4e72dcec | 409 | if (!strcmp(var, "i18n.commitencoding")) { |
dbb2b41a | 410 | git_commit_encoding = xstrdup(value); |
4e72dcec JH |
411 | return 0; |
412 | } | |
413 | ||
d2c11a38 | 414 | if (!strcmp(var, "i18n.logoutputencoding")) { |
dbb2b41a | 415 | git_log_output_encoding = xstrdup(value); |
d2c11a38 JH |
416 | return 0; |
417 | } | |
418 | ||
419 | ||
a159ca0c | 420 | if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) { |
aa086eb8 ML |
421 | pager_use_color = git_config_bool(var,value); |
422 | return 0; | |
423 | } | |
424 | ||
54adf370 BG |
425 | if (!strcmp(var, "core.pager")) { |
426 | pager_program = xstrdup(value); | |
427 | return 0; | |
428 | } | |
429 | ||
4d87b9c5 JS |
430 | if (!strcmp(var, "core.editor")) { |
431 | editor_program = xstrdup(value); | |
432 | return 0; | |
433 | } | |
434 | ||
039bc64e JH |
435 | if (!strcmp(var, "core.excludesfile")) { |
436 | if (!value) | |
437 | die("core.excludesfile without value"); | |
438 | excludes_file = xstrdup(value); | |
439 | return 0; | |
440 | } | |
441 | ||
1ab661dd | 442 | /* Add other config variables here and to Documentation/config.txt. */ |
17712991 LT |
443 | return 0; |
444 | } | |
445 | ||
4f629539 | 446 | int git_config_from_file(config_fn_t fn, const char *filename) |
17712991 LT |
447 | { |
448 | int ret; | |
4f629539 | 449 | FILE *f = fopen(filename, "r"); |
17712991 LT |
450 | |
451 | ret = -1; | |
452 | if (f) { | |
453 | config_file = f; | |
4f629539 | 454 | config_file_name = filename; |
17712991 LT |
455 | config_linenr = 1; |
456 | ret = git_parse_file(fn); | |
457 | fclose(f); | |
4f629539 | 458 | config_file_name = NULL; |
17712991 LT |
459 | } |
460 | return ret; | |
461 | } | |
10bea152 | 462 | |
506b17b1 JS |
463 | const char *git_etc_gitconfig(void) |
464 | { | |
7f0e39fa JS |
465 | static const char *system_wide; |
466 | if (!system_wide) { | |
467 | system_wide = ETC_GITCONFIG; | |
468 | if (!is_absolute_path(system_wide)) { | |
469 | /* interpret path relative to exec-dir */ | |
470 | const char *exec_path = git_exec_path(); | |
471 | system_wide = prefix_path(exec_path, strlen(exec_path), | |
472 | system_wide); | |
473 | } | |
474 | } | |
475 | return system_wide; | |
506b17b1 JS |
476 | } |
477 | ||
4f629539 JH |
478 | int git_config(config_fn_t fn) |
479 | { | |
5f1a63e0 JS |
480 | int ret = 0; |
481 | char *repo_config = NULL; | |
482 | const char *home = NULL, *filename; | |
483 | ||
484 | /* $GIT_CONFIG makes git read _only_ the given config file, | |
485 | * $GIT_CONFIG_LOCAL will make it process it in addition to the | |
486 | * global config file, the same way it would the per-repository | |
487 | * config file otherwise. */ | |
d4ebc36c | 488 | filename = getenv(CONFIG_ENVIRONMENT); |
5f1a63e0 | 489 | if (!filename) { |
506b17b1 JS |
490 | if (!access(git_etc_gitconfig(), R_OK)) |
491 | ret += git_config_from_file(fn, git_etc_gitconfig()); | |
5f1a63e0 | 492 | home = getenv("HOME"); |
d4ebc36c | 493 | filename = getenv(CONFIG_LOCAL_ENVIRONMENT); |
5f1a63e0 | 494 | if (!filename) |
9befac47 | 495 | filename = repo_config = xstrdup(git_path("config")); |
7f29f7a9 | 496 | } |
5f1a63e0 JS |
497 | |
498 | if (home) { | |
9befac47 | 499 | char *user_config = xstrdup(mkpath("%s/.gitconfig", home)); |
e33d0611 | 500 | if (!access(user_config, R_OK)) |
5f1a63e0 JS |
501 | ret = git_config_from_file(fn, user_config); |
502 | free(user_config); | |
503 | } | |
504 | ||
505 | ret += git_config_from_file(fn, filename); | |
4cac42b1 | 506 | free(repo_config); |
5f1a63e0 | 507 | return ret; |
4f629539 JH |
508 | } |
509 | ||
10bea152 JS |
510 | /* |
511 | * Find all the stuff for git_config_set() below. | |
512 | */ | |
4ddba79d JS |
513 | |
514 | #define MAX_MATCHES 512 | |
515 | ||
10bea152 JS |
516 | static struct { |
517 | int baselen; | |
518 | char* key; | |
f98d863d | 519 | int do_not_match; |
10bea152 | 520 | regex_t* value_regex; |
4ddba79d | 521 | int multi_replace; |
dc49cd76 | 522 | size_t offset[MAX_MATCHES]; |
10bea152 JS |
523 | enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state; |
524 | int seen; | |
525 | } store; | |
526 | ||
f98d863d JS |
527 | static int matches(const char* key, const char* value) |
528 | { | |
529 | return !strcmp(key, store.key) && | |
530 | (store.value_regex == NULL || | |
531 | (store.do_not_match ^ | |
532 | !regexec(store.value_regex, value, 0, NULL, 0))); | |
533 | } | |
534 | ||
10bea152 JS |
535 | static int store_aux(const char* key, const char* value) |
536 | { | |
ae9ee41d JH |
537 | const char *ep; |
538 | size_t section_len; | |
539 | ||
10bea152 JS |
540 | switch (store.state) { |
541 | case KEY_SEEN: | |
f98d863d | 542 | if (matches(key, value)) { |
4ddba79d | 543 | if (store.seen == 1 && store.multi_replace == 0) { |
10bea152 JS |
544 | fprintf(stderr, |
545 | "Warning: %s has multiple values\n", | |
546 | key); | |
4ddba79d JS |
547 | } else if (store.seen >= MAX_MATCHES) { |
548 | fprintf(stderr, "Too many matches\n"); | |
549 | return 1; | |
10bea152 | 550 | } |
4ddba79d JS |
551 | |
552 | store.offset[store.seen] = ftell(config_file); | |
10bea152 JS |
553 | store.seen++; |
554 | } | |
555 | break; | |
556 | case SECTION_SEEN: | |
ae9ee41d JH |
557 | /* |
558 | * What we are looking for is in store.key (both | |
559 | * section and var), and its section part is baselen | |
560 | * long. We found key (again, both section and var). | |
561 | * We would want to know if this key is in the same | |
562 | * section as what we are looking for. We already | |
563 | * know we are in the same section as what should | |
564 | * hold store.key. | |
565 | */ | |
566 | ep = strrchr(key, '.'); | |
567 | section_len = ep - key; | |
568 | ||
569 | if ((section_len != store.baselen) || | |
570 | memcmp(key, store.key, section_len+1)) { | |
10bea152 JS |
571 | store.state = SECTION_END_SEEN; |
572 | break; | |
ae9ee41d JH |
573 | } |
574 | ||
575 | /* | |
576 | * Do not increment matches: this is no match, but we | |
577 | * just made sure we are in the desired section. | |
578 | */ | |
579 | store.offset[store.seen] = ftell(config_file); | |
10bea152 JS |
580 | /* fallthru */ |
581 | case SECTION_END_SEEN: | |
582 | case START: | |
f98d863d | 583 | if (matches(key, value)) { |
4ddba79d | 584 | store.offset[store.seen] = ftell(config_file); |
10bea152 JS |
585 | store.state = KEY_SEEN; |
586 | store.seen++; | |
d14f7764 LT |
587 | } else { |
588 | if (strrchr(key, '.') - key == store.baselen && | |
bdf0ef08 | 589 | !strncmp(key, store.key, store.baselen)) { |
93ddef3e | 590 | store.state = SECTION_SEEN; |
bdf0ef08 | 591 | store.offset[store.seen] = ftell(config_file); |
d14f7764 | 592 | } |
bdf0ef08 | 593 | } |
10bea152 JS |
594 | } |
595 | return 0; | |
596 | } | |
597 | ||
b79d18c9 | 598 | static int write_error(void) |
480c9e52 AW |
599 | { |
600 | fprintf(stderr, "Failed to write new configuration file\n"); | |
601 | ||
602 | /* Same error code as "failed to rename". */ | |
603 | return 4; | |
604 | } | |
605 | ||
606 | static int store_write_section(int fd, const char* key) | |
10bea152 | 607 | { |
d14f7764 LT |
608 | const char *dot = strchr(key, '.'); |
609 | int len1 = store.baselen, len2 = -1; | |
610 | ||
611 | dot = strchr(key, '.'); | |
612 | if (dot) { | |
613 | int dotlen = dot - key; | |
614 | if (dotlen < len1) { | |
615 | len2 = len1 - dotlen - 1; | |
616 | len1 = dotlen; | |
617 | } | |
618 | } | |
619 | ||
480c9e52 AW |
620 | if (write_in_full(fd, "[", 1) != 1 || |
621 | write_in_full(fd, key, len1) != len1) | |
622 | return 0; | |
d14f7764 | 623 | if (len2 >= 0) { |
480c9e52 AW |
624 | if (write_in_full(fd, " \"", 2) != 2) |
625 | return 0; | |
d14f7764 LT |
626 | while (--len2 >= 0) { |
627 | unsigned char c = *++dot; | |
628 | if (c == '"') | |
480c9e52 AW |
629 | if (write_in_full(fd, "\\", 1) != 1) |
630 | return 0; | |
631 | if (write_in_full(fd, &c, 1) != 1) | |
632 | return 0; | |
d14f7764 | 633 | } |
480c9e52 AW |
634 | if (write_in_full(fd, "\"", 1) != 1) |
635 | return 0; | |
d14f7764 | 636 | } |
480c9e52 AW |
637 | if (write_in_full(fd, "]\n", 2) != 2) |
638 | return 0; | |
639 | ||
640 | return 1; | |
10bea152 JS |
641 | } |
642 | ||
480c9e52 | 643 | static int store_write_pair(int fd, const char* key, const char* value) |
10bea152 JS |
644 | { |
645 | int i; | |
480c9e52 | 646 | int length = strlen(key+store.baselen+1); |
cdd4fb15 BG |
647 | int quote = 0; |
648 | ||
649 | /* Check to see if the value needs to be quoted. */ | |
650 | if (value[0] == ' ') | |
651 | quote = 1; | |
652 | for (i = 0; value[i]; i++) | |
653 | if (value[i] == ';' || value[i] == '#') | |
654 | quote = 1; | |
655 | if (value[i-1] == ' ') | |
656 | quote = 1; | |
10bea152 | 657 | |
480c9e52 AW |
658 | if (write_in_full(fd, "\t", 1) != 1 || |
659 | write_in_full(fd, key+store.baselen+1, length) != length || | |
660 | write_in_full(fd, " = ", 3) != 3) | |
661 | return 0; | |
cdd4fb15 BG |
662 | if (quote && write_in_full(fd, "\"", 1) != 1) |
663 | return 0; | |
10bea152 JS |
664 | for (i = 0; value[i]; i++) |
665 | switch (value[i]) { | |
480c9e52 AW |
666 | case '\n': |
667 | if (write_in_full(fd, "\\n", 2) != 2) | |
668 | return 0; | |
669 | break; | |
670 | case '\t': | |
671 | if (write_in_full(fd, "\\t", 2) != 2) | |
672 | return 0; | |
673 | break; | |
674 | case '"': | |
675 | case '\\': | |
676 | if (write_in_full(fd, "\\", 1) != 1) | |
677 | return 0; | |
678 | default: | |
679 | if (write_in_full(fd, value+i, 1) != 1) | |
680 | return 0; | |
681 | break; | |
682 | } | |
cdd4fb15 BG |
683 | if (quote && write_in_full(fd, "\"", 1) != 1) |
684 | return 0; | |
480c9e52 AW |
685 | if (write_in_full(fd, "\n", 1) != 1) |
686 | return 0; | |
687 | return 1; | |
10bea152 JS |
688 | } |
689 | ||
dc49cd76 SP |
690 | static ssize_t find_beginning_of_line(const char* contents, size_t size, |
691 | size_t offset_, int* found_bracket) | |
4ddba79d | 692 | { |
dc49cd76 SP |
693 | size_t equal_offset = size, bracket_offset = size; |
694 | ssize_t offset; | |
4ddba79d | 695 | |
a6080a0a | 696 | for (offset = offset_-2; offset > 0 |
4ddba79d JS |
697 | && contents[offset] != '\n'; offset--) |
698 | switch (contents[offset]) { | |
699 | case '=': equal_offset = offset; break; | |
700 | case ']': bracket_offset = offset; break; | |
701 | } | |
702 | if (bracket_offset < equal_offset) { | |
703 | *found_bracket = 1; | |
704 | offset = bracket_offset+1; | |
705 | } else | |
706 | offset++; | |
707 | ||
708 | return offset; | |
709 | } | |
710 | ||
10bea152 JS |
711 | int git_config_set(const char* key, const char* value) |
712 | { | |
4ddba79d | 713 | return git_config_set_multivar(key, value, NULL, 0); |
10bea152 JS |
714 | } |
715 | ||
716 | /* | |
717 | * If value==NULL, unset in (remove from) config, | |
718 | * if value_regex!=NULL, disregard key/value pairs where value does not match. | |
4ddba79d JS |
719 | * if multi_replace==0, nothing, or only one matching key/value is replaced, |
720 | * else all matching key/values (regardless how many) are removed, | |
721 | * before the new pair is written. | |
10bea152 JS |
722 | * |
723 | * Returns 0 on success. | |
724 | * | |
725 | * This function does this: | |
726 | * | |
727 | * - it locks the config file by creating ".git/config.lock" | |
728 | * | |
729 | * - it then parses the config using store_aux() as validator to find | |
730 | * the position on the key/value pair to replace. If it is to be unset, | |
731 | * it must be found exactly once. | |
732 | * | |
733 | * - the config file is mmap()ed and the part before the match (if any) is | |
734 | * written to the lock file, then the changed part and the rest. | |
735 | * | |
736 | * - the config file is removed and the lock file rename()d to it. | |
737 | * | |
738 | */ | |
739 | int git_config_set_multivar(const char* key, const char* value, | |
4ddba79d | 740 | const char* value_regex, int multi_replace) |
10bea152 | 741 | { |
d14f7764 | 742 | int i, dot; |
f8ba655e | 743 | int fd = -1, in_fd; |
dafc88b1 | 744 | int ret; |
9c3796fc | 745 | char* config_filename; |
6cbf973c | 746 | struct lock_file *lock = NULL; |
b17e659d | 747 | const char* last_dot = strrchr(key, '.'); |
4ddba79d | 748 | |
d4ebc36c | 749 | config_filename = getenv(CONFIG_ENVIRONMENT); |
9c3796fc | 750 | if (!config_filename) { |
d4ebc36c | 751 | config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT); |
9c3796fc JS |
752 | if (!config_filename) |
753 | config_filename = git_path("config"); | |
754 | } | |
9befac47 | 755 | config_filename = xstrdup(config_filename); |
9c3796fc | 756 | |
10bea152 JS |
757 | /* |
758 | * Since "key" actually contains the section name and the real | |
759 | * key name separated by a dot, we have to know where the dot is. | |
760 | */ | |
b17e659d | 761 | |
dafc88b1 | 762 | if (last_dot == NULL) { |
10bea152 | 763 | fprintf(stderr, "key does not contain a section: %s\n", key); |
dafc88b1 SH |
764 | ret = 2; |
765 | goto out_free; | |
10bea152 | 766 | } |
b17e659d JS |
767 | store.baselen = last_dot - key; |
768 | ||
769 | store.multi_replace = multi_replace; | |
10bea152 JS |
770 | |
771 | /* | |
772 | * Validate the key and while at it, lower case it for matching. | |
773 | */ | |
2d7320d0 | 774 | store.key = xmalloc(strlen(key) + 1); |
d14f7764 LT |
775 | dot = 0; |
776 | for (i = 0; key[i]; i++) { | |
777 | unsigned char c = key[i]; | |
778 | if (c == '.') | |
779 | dot = 1; | |
780 | /* Leave the extended basename untouched.. */ | |
781 | if (!dot || i > store.baselen) { | |
38c5afa8 | 782 | if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) { |
d14f7764 LT |
783 | fprintf(stderr, "invalid key: %s\n", key); |
784 | free(store.key); | |
785 | ret = 1; | |
786 | goto out_free; | |
787 | } | |
788 | c = tolower(c); | |
6f71686e JS |
789 | } else if (c == '\n') { |
790 | fprintf(stderr, "invalid key (newline): %s\n", key); | |
791 | free(store.key); | |
792 | ret = 1; | |
793 | goto out_free; | |
d14f7764 LT |
794 | } |
795 | store.key[i] = c; | |
796 | } | |
3dd94e3b | 797 | store.key[i] = 0; |
10bea152 JS |
798 | |
799 | /* | |
6cbf973c | 800 | * The lock serves a purpose in addition to locking: the new |
10bea152 JS |
801 | * contents of .git/config will be written into it. |
802 | */ | |
6cbf973c BS |
803 | lock = xcalloc(sizeof(struct lock_file), 1); |
804 | fd = hold_lock_file_for_update(lock, config_filename, 0); | |
805 | if (fd < 0) { | |
10bea152 JS |
806 | fprintf(stderr, "could not lock config file\n"); |
807 | free(store.key); | |
dafc88b1 SH |
808 | ret = -1; |
809 | goto out_free; | |
10bea152 JS |
810 | } |
811 | ||
812 | /* | |
813 | * If .git/config does not exist yet, write a minimal version. | |
814 | */ | |
88fb958b AR |
815 | in_fd = open(config_filename, O_RDONLY); |
816 | if ( in_fd < 0 ) { | |
10bea152 JS |
817 | free(store.key); |
818 | ||
88fb958b AR |
819 | if ( ENOENT != errno ) { |
820 | error("opening %s: %s", config_filename, | |
821 | strerror(errno)); | |
dafc88b1 SH |
822 | ret = 3; /* same as "invalid config file" */ |
823 | goto out_free; | |
88fb958b | 824 | } |
10bea152 JS |
825 | /* if nothing to unset, error out */ |
826 | if (value == NULL) { | |
dafc88b1 SH |
827 | ret = 5; |
828 | goto out_free; | |
10bea152 JS |
829 | } |
830 | ||
831 | store.key = (char*)key; | |
480c9e52 | 832 | if (!store_write_section(fd, key) || |
93c1e079 JH |
833 | !store_write_pair(fd, key, value)) |
834 | goto write_err_out; | |
835 | } else { | |
88fb958b | 836 | struct stat st; |
10bea152 | 837 | char* contents; |
dc49cd76 SP |
838 | size_t contents_sz, copy_begin, copy_end; |
839 | int i, new_line = 0; | |
10bea152 JS |
840 | |
841 | if (value_regex == NULL) | |
842 | store.value_regex = NULL; | |
843 | else { | |
f98d863d JS |
844 | if (value_regex[0] == '!') { |
845 | store.do_not_match = 1; | |
846 | value_regex++; | |
847 | } else | |
848 | store.do_not_match = 0; | |
849 | ||
2d7320d0 | 850 | store.value_regex = (regex_t*)xmalloc(sizeof(regex_t)); |
10bea152 JS |
851 | if (regcomp(store.value_regex, value_regex, |
852 | REG_EXTENDED)) { | |
7246ed43 | 853 | fprintf(stderr, "Invalid pattern: %s\n", |
10bea152 JS |
854 | value_regex); |
855 | free(store.value_regex); | |
dafc88b1 SH |
856 | ret = 6; |
857 | goto out_free; | |
10bea152 JS |
858 | } |
859 | } | |
860 | ||
4ddba79d | 861 | store.offset[0] = 0; |
10bea152 JS |
862 | store.state = START; |
863 | store.seen = 0; | |
864 | ||
865 | /* | |
866 | * After this, store.offset will contain the *end* offset | |
867 | * of the last match, or remain at 0 if no match was found. | |
868 | * As a side effect, we make sure to transform only a valid | |
869 | * existing config file. | |
870 | */ | |
9c3796fc | 871 | if (git_config_from_file(store_aux, config_filename)) { |
10bea152 JS |
872 | fprintf(stderr, "invalid config file\n"); |
873 | free(store.key); | |
874 | if (store.value_regex != NULL) { | |
875 | regfree(store.value_regex); | |
876 | free(store.value_regex); | |
877 | } | |
dafc88b1 SH |
878 | ret = 3; |
879 | goto out_free; | |
10bea152 JS |
880 | } |
881 | ||
882 | free(store.key); | |
883 | if (store.value_regex != NULL) { | |
884 | regfree(store.value_regex); | |
885 | free(store.value_regex); | |
886 | } | |
887 | ||
4ddba79d JS |
888 | /* if nothing to unset, or too many matches, error out */ |
889 | if ((store.seen == 0 && value == NULL) || | |
890 | (store.seen > 1 && multi_replace == 0)) { | |
dafc88b1 SH |
891 | ret = 5; |
892 | goto out_free; | |
10bea152 JS |
893 | } |
894 | ||
88fb958b | 895 | fstat(in_fd, &st); |
dc49cd76 SP |
896 | contents_sz = xsize_t(st.st_size); |
897 | contents = xmmap(NULL, contents_sz, PROT_READ, | |
10bea152 JS |
898 | MAP_PRIVATE, in_fd, 0); |
899 | close(in_fd); | |
900 | ||
4ddba79d JS |
901 | if (store.seen == 0) |
902 | store.seen = 1; | |
903 | ||
904 | for (i = 0, copy_begin = 0; i < store.seen; i++) { | |
905 | if (store.offset[i] == 0) { | |
dc49cd76 | 906 | store.offset[i] = copy_end = contents_sz; |
4ddba79d JS |
907 | } else if (store.state != KEY_SEEN) { |
908 | copy_end = store.offset[i]; | |
10bea152 | 909 | } else |
4ddba79d | 910 | copy_end = find_beginning_of_line( |
dc49cd76 | 911 | contents, contents_sz, |
4ddba79d JS |
912 | store.offset[i]-2, &new_line); |
913 | ||
914 | /* write the first part of the config */ | |
915 | if (copy_end > copy_begin) { | |
93c1e079 JH |
916 | if (write_in_full(fd, contents + copy_begin, |
917 | copy_end - copy_begin) < | |
918 | copy_end - copy_begin) | |
919 | goto write_err_out; | |
920 | if (new_line && | |
921 | write_in_full(fd, "\n", 1) != 1) | |
922 | goto write_err_out; | |
4ddba79d JS |
923 | } |
924 | copy_begin = store.offset[i]; | |
10bea152 JS |
925 | } |
926 | ||
10bea152 JS |
927 | /* write the pair (value == NULL means unset) */ |
928 | if (value != NULL) { | |
93c1e079 JH |
929 | if (store.state == START) { |
930 | if (!store_write_section(fd, key)) | |
931 | goto write_err_out; | |
480c9e52 | 932 | } |
93c1e079 JH |
933 | if (!store_write_pair(fd, key, value)) |
934 | goto write_err_out; | |
10bea152 JS |
935 | } |
936 | ||
937 | /* write the rest of the config */ | |
dc49cd76 | 938 | if (copy_begin < contents_sz) |
93c1e079 | 939 | if (write_in_full(fd, contents + copy_begin, |
dc49cd76 SP |
940 | contents_sz - copy_begin) < |
941 | contents_sz - copy_begin) | |
93c1e079 | 942 | goto write_err_out; |
10bea152 | 943 | |
dc49cd76 | 944 | munmap(contents, contents_sz); |
10bea152 JS |
945 | } |
946 | ||
6cbf973c BS |
947 | if (close(fd) || commit_lock_file(lock) < 0) { |
948 | fprintf(stderr, "Cannot commit config file!\n"); | |
dafc88b1 SH |
949 | ret = 4; |
950 | goto out_free; | |
10bea152 JS |
951 | } |
952 | ||
6cbf973c BS |
953 | /* fd is closed, so don't try to close it below. */ |
954 | fd = -1; | |
955 | /* | |
956 | * lock is committed, so don't try to roll it back below. | |
957 | * NOTE: Since lockfile.c keeps a linked list of all created | |
958 | * lock_file structures, it isn't safe to free(lock). It's | |
959 | * better to just leave it hanging around. | |
960 | */ | |
961 | lock = NULL; | |
dafc88b1 SH |
962 | ret = 0; |
963 | ||
964 | out_free: | |
f8ba655e JH |
965 | if (0 <= fd) |
966 | close(fd); | |
6cbf973c BS |
967 | if (lock) |
968 | rollback_lock_file(lock); | |
4cac42b1 | 969 | free(config_filename); |
dafc88b1 | 970 | return ret; |
93c1e079 JH |
971 | |
972 | write_err_out: | |
973 | ret = write_error(); | |
974 | goto out_free; | |
975 | ||
10bea152 JS |
976 | } |
977 | ||
118f8b24 PB |
978 | static int section_name_match (const char *buf, const char *name) |
979 | { | |
980 | int i = 0, j = 0, dot = 0; | |
981 | for (; buf[i] && buf[i] != ']'; i++) { | |
982 | if (!dot && isspace(buf[i])) { | |
983 | dot = 1; | |
984 | if (name[j++] != '.') | |
985 | break; | |
986 | for (i++; isspace(buf[i]); i++) | |
987 | ; /* do nothing */ | |
988 | if (buf[i] != '"') | |
989 | break; | |
990 | continue; | |
991 | } | |
992 | if (buf[i] == '\\' && dot) | |
993 | i++; | |
994 | else if (buf[i] == '"' && dot) { | |
995 | for (i++; isspace(buf[i]); i++) | |
996 | ; /* do_nothing */ | |
997 | break; | |
998 | } | |
999 | if (buf[i] != name[j++]) | |
1000 | break; | |
1001 | } | |
1002 | return (buf[i] == ']' && name[j] == 0); | |
1003 | } | |
1004 | ||
1005 | /* if new_name == NULL, the section is removed instead */ | |
0667fcfb JS |
1006 | int git_config_rename_section(const char *old_name, const char *new_name) |
1007 | { | |
118f8b24 | 1008 | int ret = 0, remove = 0; |
fc1905bb | 1009 | char *config_filename; |
0667fcfb JS |
1010 | struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1); |
1011 | int out_fd; | |
1012 | char buf[1024]; | |
1013 | ||
d4ebc36c | 1014 | config_filename = getenv(CONFIG_ENVIRONMENT); |
0667fcfb | 1015 | if (!config_filename) { |
d4ebc36c | 1016 | config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT); |
0667fcfb JS |
1017 | if (!config_filename) |
1018 | config_filename = git_path("config"); | |
1019 | } | |
1020 | config_filename = xstrdup(config_filename); | |
1021 | out_fd = hold_lock_file_for_update(lock, config_filename, 0); | |
fc1905bb JH |
1022 | if (out_fd < 0) { |
1023 | ret = error("Could not lock config file!"); | |
1024 | goto out; | |
1025 | } | |
0667fcfb | 1026 | |
fc1905bb | 1027 | if (!(config_file = fopen(config_filename, "rb"))) { |
01ebb9dc GB |
1028 | /* no config file means nothing to rename, no error */ |
1029 | goto unlock_and_out; | |
fc1905bb | 1030 | } |
0667fcfb JS |
1031 | |
1032 | while (fgets(buf, sizeof(buf), config_file)) { | |
1033 | int i; | |
480c9e52 | 1034 | int length; |
0667fcfb JS |
1035 | for (i = 0; buf[i] && isspace(buf[i]); i++) |
1036 | ; /* do nothing */ | |
1037 | if (buf[i] == '[') { | |
1038 | /* it's a section */ | |
118f8b24 PB |
1039 | if (section_name_match (&buf[i+1], old_name)) { |
1040 | ret++; | |
1041 | if (new_name == NULL) { | |
1042 | remove = 1; | |
0667fcfb JS |
1043 | continue; |
1044 | } | |
0667fcfb | 1045 | store.baselen = strlen(new_name); |
480c9e52 AW |
1046 | if (!store_write_section(out_fd, new_name)) { |
1047 | ret = write_error(); | |
1048 | goto out; | |
1049 | } | |
0667fcfb JS |
1050 | continue; |
1051 | } | |
118f8b24 | 1052 | remove = 0; |
0667fcfb | 1053 | } |
118f8b24 PB |
1054 | if (remove) |
1055 | continue; | |
480c9e52 AW |
1056 | length = strlen(buf); |
1057 | if (write_in_full(out_fd, buf, length) != length) { | |
1058 | ret = write_error(); | |
1059 | goto out; | |
1060 | } | |
0667fcfb | 1061 | } |
fc1905bb | 1062 | fclose(config_file); |
01ebb9dc | 1063 | unlock_and_out: |
0667fcfb | 1064 | if (close(out_fd) || commit_lock_file(lock) < 0) |
480c9e52 | 1065 | ret = error("Cannot commit config file!"); |
fc1905bb JH |
1066 | out: |
1067 | free(config_filename); | |
0667fcfb JS |
1068 | return ret; |
1069 | } |