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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 | ||
a9cc857a | 442 | if (!strcmp(var, "core.whitespace")) { |
cf1b7869 | 443 | whitespace_rule_cfg = parse_whitespace_rule(value); |
a9cc857a JH |
444 | return 0; |
445 | } | |
446 | ||
1ab661dd | 447 | /* Add other config variables here and to Documentation/config.txt. */ |
17712991 LT |
448 | return 0; |
449 | } | |
450 | ||
4f629539 | 451 | int git_config_from_file(config_fn_t fn, const char *filename) |
17712991 LT |
452 | { |
453 | int ret; | |
4f629539 | 454 | FILE *f = fopen(filename, "r"); |
17712991 LT |
455 | |
456 | ret = -1; | |
457 | if (f) { | |
458 | config_file = f; | |
4f629539 | 459 | config_file_name = filename; |
17712991 LT |
460 | config_linenr = 1; |
461 | ret = git_parse_file(fn); | |
462 | fclose(f); | |
4f629539 | 463 | config_file_name = NULL; |
17712991 LT |
464 | } |
465 | return ret; | |
466 | } | |
10bea152 | 467 | |
506b17b1 JS |
468 | const char *git_etc_gitconfig(void) |
469 | { | |
7f0e39fa JS |
470 | static const char *system_wide; |
471 | if (!system_wide) { | |
472 | system_wide = ETC_GITCONFIG; | |
473 | if (!is_absolute_path(system_wide)) { | |
474 | /* interpret path relative to exec-dir */ | |
475 | const char *exec_path = git_exec_path(); | |
476 | system_wide = prefix_path(exec_path, strlen(exec_path), | |
477 | system_wide); | |
478 | } | |
479 | } | |
480 | return system_wide; | |
506b17b1 JS |
481 | } |
482 | ||
4f629539 JH |
483 | int git_config(config_fn_t fn) |
484 | { | |
5f1a63e0 JS |
485 | int ret = 0; |
486 | char *repo_config = NULL; | |
487 | const char *home = NULL, *filename; | |
488 | ||
489 | /* $GIT_CONFIG makes git read _only_ the given config file, | |
490 | * $GIT_CONFIG_LOCAL will make it process it in addition to the | |
491 | * global config file, the same way it would the per-repository | |
492 | * config file otherwise. */ | |
d4ebc36c | 493 | filename = getenv(CONFIG_ENVIRONMENT); |
5f1a63e0 | 494 | if (!filename) { |
506b17b1 JS |
495 | if (!access(git_etc_gitconfig(), R_OK)) |
496 | ret += git_config_from_file(fn, git_etc_gitconfig()); | |
5f1a63e0 | 497 | home = getenv("HOME"); |
d4ebc36c | 498 | filename = getenv(CONFIG_LOCAL_ENVIRONMENT); |
5f1a63e0 | 499 | if (!filename) |
9befac47 | 500 | filename = repo_config = xstrdup(git_path("config")); |
7f29f7a9 | 501 | } |
5f1a63e0 JS |
502 | |
503 | if (home) { | |
9befac47 | 504 | char *user_config = xstrdup(mkpath("%s/.gitconfig", home)); |
e33d0611 | 505 | if (!access(user_config, R_OK)) |
5f1a63e0 JS |
506 | ret = git_config_from_file(fn, user_config); |
507 | free(user_config); | |
508 | } | |
509 | ||
510 | ret += git_config_from_file(fn, filename); | |
4cac42b1 | 511 | free(repo_config); |
5f1a63e0 | 512 | return ret; |
4f629539 JH |
513 | } |
514 | ||
10bea152 JS |
515 | /* |
516 | * Find all the stuff for git_config_set() below. | |
517 | */ | |
4ddba79d JS |
518 | |
519 | #define MAX_MATCHES 512 | |
520 | ||
10bea152 JS |
521 | static struct { |
522 | int baselen; | |
523 | char* key; | |
f98d863d | 524 | int do_not_match; |
10bea152 | 525 | regex_t* value_regex; |
4ddba79d | 526 | int multi_replace; |
dc49cd76 | 527 | size_t offset[MAX_MATCHES]; |
10bea152 JS |
528 | enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state; |
529 | int seen; | |
530 | } store; | |
531 | ||
f98d863d JS |
532 | static int matches(const char* key, const char* value) |
533 | { | |
534 | return !strcmp(key, store.key) && | |
535 | (store.value_regex == NULL || | |
536 | (store.do_not_match ^ | |
537 | !regexec(store.value_regex, value, 0, NULL, 0))); | |
538 | } | |
539 | ||
10bea152 JS |
540 | static int store_aux(const char* key, const char* value) |
541 | { | |
ae9ee41d JH |
542 | const char *ep; |
543 | size_t section_len; | |
544 | ||
10bea152 JS |
545 | switch (store.state) { |
546 | case KEY_SEEN: | |
f98d863d | 547 | if (matches(key, value)) { |
4ddba79d | 548 | if (store.seen == 1 && store.multi_replace == 0) { |
10bea152 JS |
549 | fprintf(stderr, |
550 | "Warning: %s has multiple values\n", | |
551 | key); | |
4ddba79d JS |
552 | } else if (store.seen >= MAX_MATCHES) { |
553 | fprintf(stderr, "Too many matches\n"); | |
554 | return 1; | |
10bea152 | 555 | } |
4ddba79d JS |
556 | |
557 | store.offset[store.seen] = ftell(config_file); | |
10bea152 JS |
558 | store.seen++; |
559 | } | |
560 | break; | |
561 | case SECTION_SEEN: | |
ae9ee41d JH |
562 | /* |
563 | * What we are looking for is in store.key (both | |
564 | * section and var), and its section part is baselen | |
565 | * long. We found key (again, both section and var). | |
566 | * We would want to know if this key is in the same | |
567 | * section as what we are looking for. We already | |
568 | * know we are in the same section as what should | |
569 | * hold store.key. | |
570 | */ | |
571 | ep = strrchr(key, '.'); | |
572 | section_len = ep - key; | |
573 | ||
574 | if ((section_len != store.baselen) || | |
575 | memcmp(key, store.key, section_len+1)) { | |
10bea152 JS |
576 | store.state = SECTION_END_SEEN; |
577 | break; | |
ae9ee41d JH |
578 | } |
579 | ||
580 | /* | |
581 | * Do not increment matches: this is no match, but we | |
582 | * just made sure we are in the desired section. | |
583 | */ | |
584 | store.offset[store.seen] = ftell(config_file); | |
10bea152 JS |
585 | /* fallthru */ |
586 | case SECTION_END_SEEN: | |
587 | case START: | |
f98d863d | 588 | if (matches(key, value)) { |
4ddba79d | 589 | store.offset[store.seen] = ftell(config_file); |
10bea152 JS |
590 | store.state = KEY_SEEN; |
591 | store.seen++; | |
d14f7764 LT |
592 | } else { |
593 | if (strrchr(key, '.') - key == store.baselen && | |
bdf0ef08 | 594 | !strncmp(key, store.key, store.baselen)) { |
93ddef3e | 595 | store.state = SECTION_SEEN; |
bdf0ef08 | 596 | store.offset[store.seen] = ftell(config_file); |
d14f7764 | 597 | } |
bdf0ef08 | 598 | } |
10bea152 JS |
599 | } |
600 | return 0; | |
601 | } | |
602 | ||
b79d18c9 | 603 | static int write_error(void) |
480c9e52 AW |
604 | { |
605 | fprintf(stderr, "Failed to write new configuration file\n"); | |
606 | ||
607 | /* Same error code as "failed to rename". */ | |
608 | return 4; | |
609 | } | |
610 | ||
611 | static int store_write_section(int fd, const char* key) | |
10bea152 | 612 | { |
cb891a59 KH |
613 | const char *dot; |
614 | int i, success; | |
615 | struct strbuf sb; | |
d14f7764 | 616 | |
cb891a59 KH |
617 | strbuf_init(&sb, 0); |
618 | dot = memchr(key, '.', store.baselen); | |
d14f7764 | 619 | if (dot) { |
cb891a59 KH |
620 | strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key); |
621 | for (i = dot - key + 1; i < store.baselen; i++) { | |
622 | if (key[i] == '"') | |
623 | strbuf_addch(&sb, '\\'); | |
624 | strbuf_addch(&sb, key[i]); | |
d14f7764 | 625 | } |
cb891a59 KH |
626 | strbuf_addstr(&sb, "\"]\n"); |
627 | } else { | |
628 | strbuf_addf(&sb, "[%.*s]\n", store.baselen, key); | |
d14f7764 LT |
629 | } |
630 | ||
cb891a59 KH |
631 | success = write_in_full(fd, sb.buf, sb.len) == sb.len; |
632 | strbuf_release(&sb); | |
480c9e52 | 633 | |
cb891a59 | 634 | return success; |
10bea152 JS |
635 | } |
636 | ||
480c9e52 | 637 | static int store_write_pair(int fd, const char* key, const char* value) |
10bea152 | 638 | { |
cb891a59 KH |
639 | int i, success; |
640 | int length = strlen(key + store.baselen + 1); | |
641 | const char *quote = ""; | |
642 | struct strbuf sb; | |
cdd4fb15 | 643 | |
6281f394 JM |
644 | /* |
645 | * Check to see if the value needs to be surrounded with a dq pair. | |
646 | * Note that problematic characters are always backslash-quoted; this | |
647 | * check is about not losing leading or trailing SP and strings that | |
648 | * follow beginning-of-comment characters (i.e. ';' and '#') by the | |
649 | * configuration parser. | |
650 | */ | |
cdd4fb15 | 651 | if (value[0] == ' ') |
cb891a59 | 652 | quote = "\""; |
cdd4fb15 BG |
653 | for (i = 0; value[i]; i++) |
654 | if (value[i] == ';' || value[i] == '#') | |
cb891a59 KH |
655 | quote = "\""; |
656 | if (i && value[i - 1] == ' ') | |
657 | quote = "\""; | |
658 | ||
659 | strbuf_init(&sb, 0); | |
660 | strbuf_addf(&sb, "\t%.*s = %s", | |
661 | length, key + store.baselen + 1, quote); | |
10bea152 | 662 | |
10bea152 JS |
663 | for (i = 0; value[i]; i++) |
664 | switch (value[i]) { | |
480c9e52 | 665 | case '\n': |
cb891a59 | 666 | strbuf_addstr(&sb, "\\n"); |
480c9e52 AW |
667 | break; |
668 | case '\t': | |
cb891a59 | 669 | strbuf_addstr(&sb, "\\t"); |
480c9e52 AW |
670 | break; |
671 | case '"': | |
672 | case '\\': | |
cb891a59 | 673 | strbuf_addch(&sb, '\\'); |
480c9e52 | 674 | default: |
cb891a59 | 675 | strbuf_addch(&sb, value[i]); |
480c9e52 AW |
676 | break; |
677 | } | |
cb891a59 KH |
678 | strbuf_addf(&sb, "%s\n", quote); |
679 | ||
680 | success = write_in_full(fd, sb.buf, sb.len) == sb.len; | |
681 | strbuf_release(&sb); | |
682 | ||
683 | return success; | |
10bea152 JS |
684 | } |
685 | ||
dc49cd76 SP |
686 | static ssize_t find_beginning_of_line(const char* contents, size_t size, |
687 | size_t offset_, int* found_bracket) | |
4ddba79d | 688 | { |
dc49cd76 SP |
689 | size_t equal_offset = size, bracket_offset = size; |
690 | ssize_t offset; | |
4ddba79d | 691 | |
a6080a0a | 692 | for (offset = offset_-2; offset > 0 |
4ddba79d JS |
693 | && contents[offset] != '\n'; offset--) |
694 | switch (contents[offset]) { | |
695 | case '=': equal_offset = offset; break; | |
696 | case ']': bracket_offset = offset; break; | |
697 | } | |
698 | if (bracket_offset < equal_offset) { | |
699 | *found_bracket = 1; | |
700 | offset = bracket_offset+1; | |
701 | } else | |
702 | offset++; | |
703 | ||
704 | return offset; | |
705 | } | |
706 | ||
10bea152 JS |
707 | int git_config_set(const char* key, const char* value) |
708 | { | |
4ddba79d | 709 | return git_config_set_multivar(key, value, NULL, 0); |
10bea152 JS |
710 | } |
711 | ||
712 | /* | |
713 | * If value==NULL, unset in (remove from) config, | |
714 | * if value_regex!=NULL, disregard key/value pairs where value does not match. | |
4ddba79d JS |
715 | * if multi_replace==0, nothing, or only one matching key/value is replaced, |
716 | * else all matching key/values (regardless how many) are removed, | |
717 | * before the new pair is written. | |
10bea152 JS |
718 | * |
719 | * Returns 0 on success. | |
720 | * | |
721 | * This function does this: | |
722 | * | |
723 | * - it locks the config file by creating ".git/config.lock" | |
724 | * | |
725 | * - it then parses the config using store_aux() as validator to find | |
726 | * the position on the key/value pair to replace. If it is to be unset, | |
727 | * it must be found exactly once. | |
728 | * | |
729 | * - the config file is mmap()ed and the part before the match (if any) is | |
730 | * written to the lock file, then the changed part and the rest. | |
731 | * | |
732 | * - the config file is removed and the lock file rename()d to it. | |
733 | * | |
734 | */ | |
735 | int git_config_set_multivar(const char* key, const char* value, | |
4ddba79d | 736 | const char* value_regex, int multi_replace) |
10bea152 | 737 | { |
d14f7764 | 738 | int i, dot; |
f8ba655e | 739 | int fd = -1, in_fd; |
dafc88b1 | 740 | int ret; |
9c3796fc | 741 | char* config_filename; |
6cbf973c | 742 | struct lock_file *lock = NULL; |
b17e659d | 743 | const char* last_dot = strrchr(key, '.'); |
4ddba79d | 744 | |
d4ebc36c | 745 | config_filename = getenv(CONFIG_ENVIRONMENT); |
9c3796fc | 746 | if (!config_filename) { |
d4ebc36c | 747 | config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT); |
9c3796fc JS |
748 | if (!config_filename) |
749 | config_filename = git_path("config"); | |
750 | } | |
9befac47 | 751 | config_filename = xstrdup(config_filename); |
9c3796fc | 752 | |
10bea152 JS |
753 | /* |
754 | * Since "key" actually contains the section name and the real | |
755 | * key name separated by a dot, we have to know where the dot is. | |
756 | */ | |
b17e659d | 757 | |
dafc88b1 | 758 | if (last_dot == NULL) { |
10bea152 | 759 | fprintf(stderr, "key does not contain a section: %s\n", key); |
dafc88b1 SH |
760 | ret = 2; |
761 | goto out_free; | |
10bea152 | 762 | } |
b17e659d JS |
763 | store.baselen = last_dot - key; |
764 | ||
765 | store.multi_replace = multi_replace; | |
10bea152 JS |
766 | |
767 | /* | |
768 | * Validate the key and while at it, lower case it for matching. | |
769 | */ | |
2d7320d0 | 770 | store.key = xmalloc(strlen(key) + 1); |
d14f7764 LT |
771 | dot = 0; |
772 | for (i = 0; key[i]; i++) { | |
773 | unsigned char c = key[i]; | |
774 | if (c == '.') | |
775 | dot = 1; | |
776 | /* Leave the extended basename untouched.. */ | |
777 | if (!dot || i > store.baselen) { | |
38c5afa8 | 778 | if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) { |
d14f7764 LT |
779 | fprintf(stderr, "invalid key: %s\n", key); |
780 | free(store.key); | |
781 | ret = 1; | |
782 | goto out_free; | |
783 | } | |
784 | c = tolower(c); | |
6f71686e JS |
785 | } else if (c == '\n') { |
786 | fprintf(stderr, "invalid key (newline): %s\n", key); | |
787 | free(store.key); | |
788 | ret = 1; | |
789 | goto out_free; | |
d14f7764 LT |
790 | } |
791 | store.key[i] = c; | |
792 | } | |
3dd94e3b | 793 | store.key[i] = 0; |
10bea152 JS |
794 | |
795 | /* | |
6cbf973c | 796 | * The lock serves a purpose in addition to locking: the new |
10bea152 JS |
797 | * contents of .git/config will be written into it. |
798 | */ | |
6cbf973c BS |
799 | lock = xcalloc(sizeof(struct lock_file), 1); |
800 | fd = hold_lock_file_for_update(lock, config_filename, 0); | |
801 | if (fd < 0) { | |
10bea152 JS |
802 | fprintf(stderr, "could not lock config file\n"); |
803 | free(store.key); | |
dafc88b1 SH |
804 | ret = -1; |
805 | goto out_free; | |
10bea152 JS |
806 | } |
807 | ||
808 | /* | |
809 | * If .git/config does not exist yet, write a minimal version. | |
810 | */ | |
88fb958b AR |
811 | in_fd = open(config_filename, O_RDONLY); |
812 | if ( in_fd < 0 ) { | |
10bea152 JS |
813 | free(store.key); |
814 | ||
88fb958b AR |
815 | if ( ENOENT != errno ) { |
816 | error("opening %s: %s", config_filename, | |
817 | strerror(errno)); | |
dafc88b1 SH |
818 | ret = 3; /* same as "invalid config file" */ |
819 | goto out_free; | |
88fb958b | 820 | } |
10bea152 JS |
821 | /* if nothing to unset, error out */ |
822 | if (value == NULL) { | |
dafc88b1 SH |
823 | ret = 5; |
824 | goto out_free; | |
10bea152 JS |
825 | } |
826 | ||
827 | store.key = (char*)key; | |
480c9e52 | 828 | if (!store_write_section(fd, key) || |
93c1e079 JH |
829 | !store_write_pair(fd, key, value)) |
830 | goto write_err_out; | |
831 | } else { | |
88fb958b | 832 | struct stat st; |
10bea152 | 833 | char* contents; |
dc49cd76 SP |
834 | size_t contents_sz, copy_begin, copy_end; |
835 | int i, new_line = 0; | |
10bea152 JS |
836 | |
837 | if (value_regex == NULL) | |
838 | store.value_regex = NULL; | |
839 | else { | |
f98d863d JS |
840 | if (value_regex[0] == '!') { |
841 | store.do_not_match = 1; | |
842 | value_regex++; | |
843 | } else | |
844 | store.do_not_match = 0; | |
845 | ||
2d7320d0 | 846 | store.value_regex = (regex_t*)xmalloc(sizeof(regex_t)); |
10bea152 JS |
847 | if (regcomp(store.value_regex, value_regex, |
848 | REG_EXTENDED)) { | |
7246ed43 | 849 | fprintf(stderr, "Invalid pattern: %s\n", |
10bea152 JS |
850 | value_regex); |
851 | free(store.value_regex); | |
dafc88b1 SH |
852 | ret = 6; |
853 | goto out_free; | |
10bea152 JS |
854 | } |
855 | } | |
856 | ||
4ddba79d | 857 | store.offset[0] = 0; |
10bea152 JS |
858 | store.state = START; |
859 | store.seen = 0; | |
860 | ||
861 | /* | |
862 | * After this, store.offset will contain the *end* offset | |
863 | * of the last match, or remain at 0 if no match was found. | |
864 | * As a side effect, we make sure to transform only a valid | |
865 | * existing config file. | |
866 | */ | |
9c3796fc | 867 | if (git_config_from_file(store_aux, config_filename)) { |
10bea152 JS |
868 | fprintf(stderr, "invalid config file\n"); |
869 | free(store.key); | |
870 | if (store.value_regex != NULL) { | |
871 | regfree(store.value_regex); | |
872 | free(store.value_regex); | |
873 | } | |
dafc88b1 SH |
874 | ret = 3; |
875 | goto out_free; | |
10bea152 JS |
876 | } |
877 | ||
878 | free(store.key); | |
879 | if (store.value_regex != NULL) { | |
880 | regfree(store.value_regex); | |
881 | free(store.value_regex); | |
882 | } | |
883 | ||
4ddba79d JS |
884 | /* if nothing to unset, or too many matches, error out */ |
885 | if ((store.seen == 0 && value == NULL) || | |
886 | (store.seen > 1 && multi_replace == 0)) { | |
dafc88b1 SH |
887 | ret = 5; |
888 | goto out_free; | |
10bea152 JS |
889 | } |
890 | ||
88fb958b | 891 | fstat(in_fd, &st); |
dc49cd76 SP |
892 | contents_sz = xsize_t(st.st_size); |
893 | contents = xmmap(NULL, contents_sz, PROT_READ, | |
10bea152 JS |
894 | MAP_PRIVATE, in_fd, 0); |
895 | close(in_fd); | |
896 | ||
4ddba79d JS |
897 | if (store.seen == 0) |
898 | store.seen = 1; | |
899 | ||
900 | for (i = 0, copy_begin = 0; i < store.seen; i++) { | |
901 | if (store.offset[i] == 0) { | |
dc49cd76 | 902 | store.offset[i] = copy_end = contents_sz; |
4ddba79d JS |
903 | } else if (store.state != KEY_SEEN) { |
904 | copy_end = store.offset[i]; | |
10bea152 | 905 | } else |
4ddba79d | 906 | copy_end = find_beginning_of_line( |
dc49cd76 | 907 | contents, contents_sz, |
4ddba79d JS |
908 | store.offset[i]-2, &new_line); |
909 | ||
910 | /* write the first part of the config */ | |
911 | if (copy_end > copy_begin) { | |
93c1e079 JH |
912 | if (write_in_full(fd, contents + copy_begin, |
913 | copy_end - copy_begin) < | |
914 | copy_end - copy_begin) | |
915 | goto write_err_out; | |
916 | if (new_line && | |
917 | write_in_full(fd, "\n", 1) != 1) | |
918 | goto write_err_out; | |
4ddba79d JS |
919 | } |
920 | copy_begin = store.offset[i]; | |
10bea152 JS |
921 | } |
922 | ||
10bea152 JS |
923 | /* write the pair (value == NULL means unset) */ |
924 | if (value != NULL) { | |
93c1e079 JH |
925 | if (store.state == START) { |
926 | if (!store_write_section(fd, key)) | |
927 | goto write_err_out; | |
480c9e52 | 928 | } |
93c1e079 JH |
929 | if (!store_write_pair(fd, key, value)) |
930 | goto write_err_out; | |
10bea152 JS |
931 | } |
932 | ||
933 | /* write the rest of the config */ | |
dc49cd76 | 934 | if (copy_begin < contents_sz) |
93c1e079 | 935 | if (write_in_full(fd, contents + copy_begin, |
dc49cd76 SP |
936 | contents_sz - copy_begin) < |
937 | contents_sz - copy_begin) | |
93c1e079 | 938 | goto write_err_out; |
10bea152 | 939 | |
dc49cd76 | 940 | munmap(contents, contents_sz); |
10bea152 JS |
941 | } |
942 | ||
6cbf973c BS |
943 | if (close(fd) || commit_lock_file(lock) < 0) { |
944 | fprintf(stderr, "Cannot commit config file!\n"); | |
dafc88b1 SH |
945 | ret = 4; |
946 | goto out_free; | |
10bea152 JS |
947 | } |
948 | ||
6cbf973c BS |
949 | /* fd is closed, so don't try to close it below. */ |
950 | fd = -1; | |
951 | /* | |
952 | * lock is committed, so don't try to roll it back below. | |
953 | * NOTE: Since lockfile.c keeps a linked list of all created | |
954 | * lock_file structures, it isn't safe to free(lock). It's | |
955 | * better to just leave it hanging around. | |
956 | */ | |
957 | lock = NULL; | |
dafc88b1 SH |
958 | ret = 0; |
959 | ||
960 | out_free: | |
f8ba655e JH |
961 | if (0 <= fd) |
962 | close(fd); | |
6cbf973c BS |
963 | if (lock) |
964 | rollback_lock_file(lock); | |
4cac42b1 | 965 | free(config_filename); |
dafc88b1 | 966 | return ret; |
93c1e079 JH |
967 | |
968 | write_err_out: | |
969 | ret = write_error(); | |
970 | goto out_free; | |
971 | ||
10bea152 JS |
972 | } |
973 | ||
118f8b24 PB |
974 | static int section_name_match (const char *buf, const char *name) |
975 | { | |
976 | int i = 0, j = 0, dot = 0; | |
977 | for (; buf[i] && buf[i] != ']'; i++) { | |
978 | if (!dot && isspace(buf[i])) { | |
979 | dot = 1; | |
980 | if (name[j++] != '.') | |
981 | break; | |
982 | for (i++; isspace(buf[i]); i++) | |
983 | ; /* do nothing */ | |
984 | if (buf[i] != '"') | |
985 | break; | |
986 | continue; | |
987 | } | |
988 | if (buf[i] == '\\' && dot) | |
989 | i++; | |
990 | else if (buf[i] == '"' && dot) { | |
991 | for (i++; isspace(buf[i]); i++) | |
992 | ; /* do_nothing */ | |
993 | break; | |
994 | } | |
995 | if (buf[i] != name[j++]) | |
996 | break; | |
997 | } | |
998 | return (buf[i] == ']' && name[j] == 0); | |
999 | } | |
1000 | ||
1001 | /* if new_name == NULL, the section is removed instead */ | |
0667fcfb JS |
1002 | int git_config_rename_section(const char *old_name, const char *new_name) |
1003 | { | |
118f8b24 | 1004 | int ret = 0, remove = 0; |
fc1905bb | 1005 | char *config_filename; |
0667fcfb JS |
1006 | struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1); |
1007 | int out_fd; | |
1008 | char buf[1024]; | |
1009 | ||
d4ebc36c | 1010 | config_filename = getenv(CONFIG_ENVIRONMENT); |
0667fcfb | 1011 | if (!config_filename) { |
d4ebc36c | 1012 | config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT); |
0667fcfb JS |
1013 | if (!config_filename) |
1014 | config_filename = git_path("config"); | |
1015 | } | |
1016 | config_filename = xstrdup(config_filename); | |
1017 | out_fd = hold_lock_file_for_update(lock, config_filename, 0); | |
fc1905bb JH |
1018 | if (out_fd < 0) { |
1019 | ret = error("Could not lock config file!"); | |
1020 | goto out; | |
1021 | } | |
0667fcfb | 1022 | |
fc1905bb | 1023 | if (!(config_file = fopen(config_filename, "rb"))) { |
01ebb9dc GB |
1024 | /* no config file means nothing to rename, no error */ |
1025 | goto unlock_and_out; | |
fc1905bb | 1026 | } |
0667fcfb JS |
1027 | |
1028 | while (fgets(buf, sizeof(buf), config_file)) { | |
1029 | int i; | |
480c9e52 | 1030 | int length; |
0667fcfb JS |
1031 | for (i = 0; buf[i] && isspace(buf[i]); i++) |
1032 | ; /* do nothing */ | |
1033 | if (buf[i] == '[') { | |
1034 | /* it's a section */ | |
118f8b24 PB |
1035 | if (section_name_match (&buf[i+1], old_name)) { |
1036 | ret++; | |
1037 | if (new_name == NULL) { | |
1038 | remove = 1; | |
0667fcfb JS |
1039 | continue; |
1040 | } | |
0667fcfb | 1041 | store.baselen = strlen(new_name); |
480c9e52 AW |
1042 | if (!store_write_section(out_fd, new_name)) { |
1043 | ret = write_error(); | |
1044 | goto out; | |
1045 | } | |
0667fcfb JS |
1046 | continue; |
1047 | } | |
118f8b24 | 1048 | remove = 0; |
0667fcfb | 1049 | } |
118f8b24 PB |
1050 | if (remove) |
1051 | continue; | |
480c9e52 AW |
1052 | length = strlen(buf); |
1053 | if (write_in_full(out_fd, buf, length) != length) { | |
1054 | ret = write_error(); | |
1055 | goto out; | |
1056 | } | |
0667fcfb | 1057 | } |
fc1905bb | 1058 | fclose(config_file); |
01ebb9dc | 1059 | unlock_and_out: |
0667fcfb | 1060 | if (close(out_fd) || commit_lock_file(lock) < 0) |
480c9e52 | 1061 | ret = error("Cannot commit config file!"); |
fc1905bb JH |
1062 | out: |
1063 | free(config_filename); | |
0667fcfb JS |
1064 | return ret; |
1065 | } |