doc: describe git svn init --ignore-refs
[git/git-svn.git] / submodule-config.c
blob4f58491ddb0705ab56e238006199d35db19dfb5a
1 #include "cache.h"
2 #include "submodule-config.h"
3 #include "submodule.h"
4 #include "strbuf.h"
6 /*
7 * submodule cache lookup structure
8 * There is one shared set of 'struct submodule' entries which can be
9 * looked up by their sha1 blob id of the .gitmodule file and either
10 * using path or name as key.
11 * for_path stores submodule entries with path as key
12 * for_name stores submodule entries with name as key
14 struct submodule_cache {
15 struct hashmap for_path;
16 struct hashmap for_name;
20 * thin wrapper struct needed to insert 'struct submodule' entries to
21 * the hashmap
23 struct submodule_entry {
24 struct hashmap_entry ent;
25 struct submodule *config;
28 enum lookup_type {
29 lookup_name,
30 lookup_path
33 static struct submodule_cache the_submodule_cache;
34 static int is_cache_init;
36 static int config_path_cmp(const struct submodule_entry *a,
37 const struct submodule_entry *b,
38 const void *unused)
40 return strcmp(a->config->path, b->config->path) ||
41 hashcmp(a->config->gitmodules_sha1, b->config->gitmodules_sha1);
44 static int config_name_cmp(const struct submodule_entry *a,
45 const struct submodule_entry *b,
46 const void *unused)
48 return strcmp(a->config->name, b->config->name) ||
49 hashcmp(a->config->gitmodules_sha1, b->config->gitmodules_sha1);
52 static void cache_init(struct submodule_cache *cache)
54 hashmap_init(&cache->for_path, (hashmap_cmp_fn) config_path_cmp, 0);
55 hashmap_init(&cache->for_name, (hashmap_cmp_fn) config_name_cmp, 0);
58 static void free_one_config(struct submodule_entry *entry)
60 free((void *) entry->config->path);
61 free((void *) entry->config->name);
62 free((void *) entry->config->branch);
63 free((void *) entry->config->update_strategy.command);
64 free(entry->config);
67 static void cache_free(struct submodule_cache *cache)
69 struct hashmap_iter iter;
70 struct submodule_entry *entry;
73 * We iterate over the name hash here to be symmetric with the
74 * allocation of struct submodule entries. Each is allocated by
75 * their .gitmodule blob sha1 and submodule name.
77 hashmap_iter_init(&cache->for_name, &iter);
78 while ((entry = hashmap_iter_next(&iter)))
79 free_one_config(entry);
81 hashmap_free(&cache->for_path, 1);
82 hashmap_free(&cache->for_name, 1);
85 static unsigned int hash_sha1_string(const unsigned char *sha1,
86 const char *string)
88 return memhash(sha1, 20) + strhash(string);
91 static void cache_put_path(struct submodule_cache *cache,
92 struct submodule *submodule)
94 unsigned int hash = hash_sha1_string(submodule->gitmodules_sha1,
95 submodule->path);
96 struct submodule_entry *e = xmalloc(sizeof(*e));
97 hashmap_entry_init(e, hash);
98 e->config = submodule;
99 hashmap_put(&cache->for_path, e);
102 static void cache_remove_path(struct submodule_cache *cache,
103 struct submodule *submodule)
105 unsigned int hash = hash_sha1_string(submodule->gitmodules_sha1,
106 submodule->path);
107 struct submodule_entry e;
108 struct submodule_entry *removed;
109 hashmap_entry_init(&e, hash);
110 e.config = submodule;
111 removed = hashmap_remove(&cache->for_path, &e, NULL);
112 free(removed);
115 static void cache_add(struct submodule_cache *cache,
116 struct submodule *submodule)
118 unsigned int hash = hash_sha1_string(submodule->gitmodules_sha1,
119 submodule->name);
120 struct submodule_entry *e = xmalloc(sizeof(*e));
121 hashmap_entry_init(e, hash);
122 e->config = submodule;
123 hashmap_add(&cache->for_name, e);
126 static const struct submodule *cache_lookup_path(struct submodule_cache *cache,
127 const unsigned char *gitmodules_sha1, const char *path)
129 struct submodule_entry *entry;
130 unsigned int hash = hash_sha1_string(gitmodules_sha1, path);
131 struct submodule_entry key;
132 struct submodule key_config;
134 hashcpy(key_config.gitmodules_sha1, gitmodules_sha1);
135 key_config.path = path;
137 hashmap_entry_init(&key, hash);
138 key.config = &key_config;
140 entry = hashmap_get(&cache->for_path, &key, NULL);
141 if (entry)
142 return entry->config;
143 return NULL;
146 static struct submodule *cache_lookup_name(struct submodule_cache *cache,
147 const unsigned char *gitmodules_sha1, const char *name)
149 struct submodule_entry *entry;
150 unsigned int hash = hash_sha1_string(gitmodules_sha1, name);
151 struct submodule_entry key;
152 struct submodule key_config;
154 hashcpy(key_config.gitmodules_sha1, gitmodules_sha1);
155 key_config.name = name;
157 hashmap_entry_init(&key, hash);
158 key.config = &key_config;
160 entry = hashmap_get(&cache->for_name, &key, NULL);
161 if (entry)
162 return entry->config;
163 return NULL;
166 static int name_and_item_from_var(const char *var, struct strbuf *name,
167 struct strbuf *item)
169 const char *subsection, *key;
170 int subsection_len, parse;
171 parse = parse_config_key(var, "submodule", &subsection,
172 &subsection_len, &key);
173 if (parse < 0 || !subsection)
174 return 0;
176 strbuf_add(name, subsection, subsection_len);
177 strbuf_addstr(item, key);
179 return 1;
182 static struct submodule *lookup_or_create_by_name(struct submodule_cache *cache,
183 const unsigned char *gitmodules_sha1, const char *name)
185 struct submodule *submodule;
186 struct strbuf name_buf = STRBUF_INIT;
188 submodule = cache_lookup_name(cache, gitmodules_sha1, name);
189 if (submodule)
190 return submodule;
192 submodule = xmalloc(sizeof(*submodule));
194 strbuf_addstr(&name_buf, name);
195 submodule->name = strbuf_detach(&name_buf, NULL);
197 submodule->path = NULL;
198 submodule->url = NULL;
199 submodule->update_strategy.type = SM_UPDATE_UNSPECIFIED;
200 submodule->update_strategy.command = NULL;
201 submodule->fetch_recurse = RECURSE_SUBMODULES_NONE;
202 submodule->ignore = NULL;
203 submodule->branch = NULL;
204 submodule->recommend_shallow = -1;
206 hashcpy(submodule->gitmodules_sha1, gitmodules_sha1);
208 cache_add(cache, submodule);
210 return submodule;
213 static int parse_fetch_recurse(const char *opt, const char *arg,
214 int die_on_error)
216 switch (git_config_maybe_bool(opt, arg)) {
217 case 1:
218 return RECURSE_SUBMODULES_ON;
219 case 0:
220 return RECURSE_SUBMODULES_OFF;
221 default:
222 if (!strcmp(arg, "on-demand"))
223 return RECURSE_SUBMODULES_ON_DEMAND;
225 if (die_on_error)
226 die("bad %s argument: %s", opt, arg);
227 else
228 return RECURSE_SUBMODULES_ERROR;
232 int parse_fetch_recurse_submodules_arg(const char *opt, const char *arg)
234 return parse_fetch_recurse(opt, arg, 1);
237 static int parse_update_recurse(const char *opt, const char *arg,
238 int die_on_error)
240 switch (git_config_maybe_bool(opt, arg)) {
241 case 1:
242 return RECURSE_SUBMODULES_ON;
243 case 0:
244 return RECURSE_SUBMODULES_OFF;
245 default:
246 if (die_on_error)
247 die("bad %s argument: %s", opt, arg);
248 return RECURSE_SUBMODULES_ERROR;
252 int parse_update_recurse_submodules_arg(const char *opt, const char *arg)
254 return parse_update_recurse(opt, arg, 1);
257 static int parse_push_recurse(const char *opt, const char *arg,
258 int die_on_error)
260 switch (git_config_maybe_bool(opt, arg)) {
261 case 1:
262 /* There's no simple "on" value when pushing */
263 if (die_on_error)
264 die("bad %s argument: %s", opt, arg);
265 else
266 return RECURSE_SUBMODULES_ERROR;
267 case 0:
268 return RECURSE_SUBMODULES_OFF;
269 default:
270 if (!strcmp(arg, "on-demand"))
271 return RECURSE_SUBMODULES_ON_DEMAND;
272 else if (!strcmp(arg, "check"))
273 return RECURSE_SUBMODULES_CHECK;
274 else if (!strcmp(arg, "only"))
275 return RECURSE_SUBMODULES_ONLY;
276 else if (die_on_error)
277 die("bad %s argument: %s", opt, arg);
278 else
279 return RECURSE_SUBMODULES_ERROR;
283 int parse_push_recurse_submodules_arg(const char *opt, const char *arg)
285 return parse_push_recurse(opt, arg, 1);
288 static void warn_multiple_config(const unsigned char *treeish_name,
289 const char *name, const char *option)
291 const char *commit_string = "WORKTREE";
292 if (treeish_name)
293 commit_string = sha1_to_hex(treeish_name);
294 warning("%s:.gitmodules, multiple configurations found for "
295 "'submodule.%s.%s'. Skipping second one!",
296 commit_string, name, option);
299 struct parse_config_parameter {
300 struct submodule_cache *cache;
301 const unsigned char *treeish_name;
302 const unsigned char *gitmodules_sha1;
303 int overwrite;
306 static int parse_config(const char *var, const char *value, void *data)
308 struct parse_config_parameter *me = data;
309 struct submodule *submodule;
310 struct strbuf name = STRBUF_INIT, item = STRBUF_INIT;
311 int ret = 0;
313 /* this also ensures that we only parse submodule entries */
314 if (!name_and_item_from_var(var, &name, &item))
315 return 0;
317 submodule = lookup_or_create_by_name(me->cache,
318 me->gitmodules_sha1,
319 name.buf);
321 if (!strcmp(item.buf, "path")) {
322 if (!value)
323 ret = config_error_nonbool(var);
324 else if (!me->overwrite && submodule->path)
325 warn_multiple_config(me->treeish_name, submodule->name,
326 "path");
327 else {
328 if (submodule->path)
329 cache_remove_path(me->cache, submodule);
330 free((void *) submodule->path);
331 submodule->path = xstrdup(value);
332 cache_put_path(me->cache, submodule);
334 } else if (!strcmp(item.buf, "fetchrecursesubmodules")) {
335 /* when parsing worktree configurations we can die early */
336 int die_on_error = is_null_sha1(me->gitmodules_sha1);
337 if (!me->overwrite &&
338 submodule->fetch_recurse != RECURSE_SUBMODULES_NONE)
339 warn_multiple_config(me->treeish_name, submodule->name,
340 "fetchrecursesubmodules");
341 else
342 submodule->fetch_recurse = parse_fetch_recurse(
343 var, value,
344 die_on_error);
345 } else if (!strcmp(item.buf, "ignore")) {
346 if (!value)
347 ret = config_error_nonbool(var);
348 else if (!me->overwrite && submodule->ignore)
349 warn_multiple_config(me->treeish_name, submodule->name,
350 "ignore");
351 else if (strcmp(value, "untracked") &&
352 strcmp(value, "dirty") &&
353 strcmp(value, "all") &&
354 strcmp(value, "none"))
355 warning("Invalid parameter '%s' for config option "
356 "'submodule.%s.ignore'", value, name.buf);
357 else {
358 free((void *) submodule->ignore);
359 submodule->ignore = xstrdup(value);
361 } else if (!strcmp(item.buf, "url")) {
362 if (!value) {
363 ret = config_error_nonbool(var);
364 } else if (!me->overwrite && submodule->url) {
365 warn_multiple_config(me->treeish_name, submodule->name,
366 "url");
367 } else {
368 free((void *) submodule->url);
369 submodule->url = xstrdup(value);
371 } else if (!strcmp(item.buf, "update")) {
372 if (!value)
373 ret = config_error_nonbool(var);
374 else if (!me->overwrite &&
375 submodule->update_strategy.type != SM_UPDATE_UNSPECIFIED)
376 warn_multiple_config(me->treeish_name, submodule->name,
377 "update");
378 else if (parse_submodule_update_strategy(value,
379 &submodule->update_strategy) < 0)
380 die(_("invalid value for %s"), var);
381 } else if (!strcmp(item.buf, "shallow")) {
382 if (!me->overwrite && submodule->recommend_shallow != -1)
383 warn_multiple_config(me->treeish_name, submodule->name,
384 "shallow");
385 else
386 submodule->recommend_shallow =
387 git_config_bool(var, value);
388 } else if (!strcmp(item.buf, "branch")) {
389 if (!me->overwrite && submodule->branch)
390 warn_multiple_config(me->treeish_name, submodule->name,
391 "branch");
392 else {
393 free((void *)submodule->branch);
394 submodule->branch = xstrdup(value);
398 strbuf_release(&name);
399 strbuf_release(&item);
401 return ret;
404 int gitmodule_sha1_from_commit(const unsigned char *treeish_name,
405 unsigned char *gitmodules_sha1,
406 struct strbuf *rev)
408 int ret = 0;
410 if (is_null_sha1(treeish_name)) {
411 hashclr(gitmodules_sha1);
412 return 1;
415 strbuf_addf(rev, "%s:.gitmodules", sha1_to_hex(treeish_name));
416 if (get_sha1(rev->buf, gitmodules_sha1) >= 0)
417 ret = 1;
419 return ret;
422 /* This does a lookup of a submodule configuration by name or by path
423 * (key) with on-demand reading of the appropriate .gitmodules from
424 * revisions.
426 static const struct submodule *config_from(struct submodule_cache *cache,
427 const unsigned char *treeish_name, const char *key,
428 enum lookup_type lookup_type)
430 struct strbuf rev = STRBUF_INIT;
431 unsigned long config_size;
432 char *config = NULL;
433 unsigned char sha1[20];
434 enum object_type type;
435 const struct submodule *submodule = NULL;
436 struct parse_config_parameter parameter;
439 * If any parameter except the cache is a NULL pointer just
440 * return the first submodule. Can be used to check whether
441 * there are any submodules parsed.
443 if (!treeish_name || !key) {
444 struct hashmap_iter iter;
445 struct submodule_entry *entry;
447 entry = hashmap_iter_first(&cache->for_name, &iter);
448 if (!entry)
449 return NULL;
450 return entry->config;
453 if (!gitmodule_sha1_from_commit(treeish_name, sha1, &rev))
454 goto out;
456 switch (lookup_type) {
457 case lookup_name:
458 submodule = cache_lookup_name(cache, sha1, key);
459 break;
460 case lookup_path:
461 submodule = cache_lookup_path(cache, sha1, key);
462 break;
464 if (submodule)
465 goto out;
467 config = read_sha1_file(sha1, &type, &config_size);
468 if (!config || type != OBJ_BLOB)
469 goto out;
471 /* fill the submodule config into the cache */
472 parameter.cache = cache;
473 parameter.treeish_name = treeish_name;
474 parameter.gitmodules_sha1 = sha1;
475 parameter.overwrite = 0;
476 git_config_from_mem(parse_config, CONFIG_ORIGIN_SUBMODULE_BLOB, rev.buf,
477 config, config_size, &parameter);
478 strbuf_release(&rev);
479 free(config);
481 switch (lookup_type) {
482 case lookup_name:
483 return cache_lookup_name(cache, sha1, key);
484 case lookup_path:
485 return cache_lookup_path(cache, sha1, key);
486 default:
487 return NULL;
490 out:
491 strbuf_release(&rev);
492 free(config);
493 return submodule;
496 static void ensure_cache_init(void)
498 if (is_cache_init)
499 return;
501 cache_init(&the_submodule_cache);
502 is_cache_init = 1;
505 int parse_submodule_config_option(const char *var, const char *value)
507 struct parse_config_parameter parameter;
508 parameter.cache = &the_submodule_cache;
509 parameter.treeish_name = NULL;
510 parameter.gitmodules_sha1 = null_sha1;
511 parameter.overwrite = 1;
513 ensure_cache_init();
514 return parse_config(var, value, &parameter);
517 const struct submodule *submodule_from_name(const unsigned char *treeish_name,
518 const char *name)
520 ensure_cache_init();
521 return config_from(&the_submodule_cache, treeish_name, name, lookup_name);
524 const struct submodule *submodule_from_path(const unsigned char *treeish_name,
525 const char *path)
527 ensure_cache_init();
528 return config_from(&the_submodule_cache, treeish_name, path, lookup_path);
531 void submodule_free(void)
533 cache_free(&the_submodule_cache);
534 is_cache_init = 0;