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1 | /* | |
2 | * not really _using_ the compat macros, just make sure the_index | |
3 | * declaration matches the definition in this file. | |
4 | */ | |
5 | #define USE_THE_INDEX_VARIABLE | |
6 | #include "git-compat-util.h" | |
7 | #include "abspath.h" | |
8 | #include "repository.h" | |
9 | #include "object-store-ll.h" | |
10 | #include "config.h" | |
11 | #include "object.h" | |
12 | #include "lockfile.h" | |
13 | #include "path.h" | |
14 | #include "read-cache-ll.h" | |
15 | #include "remote.h" | |
16 | #include "setup.h" | |
17 | #include "submodule-config.h" | |
18 | #include "sparse-index.h" | |
19 | #include "trace2.h" | |
20 | #include "promisor-remote.h" | |
21 | ||
22 | /* The main repository */ | |
23 | static struct repository the_repo; | |
24 | struct repository *the_repository; | |
25 | struct index_state the_index; | |
26 | ||
27 | void initialize_the_repository(void) | |
28 | { | |
29 | the_repository = &the_repo; | |
30 | ||
31 | the_repo.index = &the_index; | |
32 | the_repo.objects = raw_object_store_new(); | |
33 | the_repo.remote_state = remote_state_new(); | |
34 | the_repo.parsed_objects = parsed_object_pool_new(); | |
35 | ||
36 | index_state_init(&the_index, the_repository); | |
37 | ||
38 | repo_set_hash_algo(&the_repo, GIT_HASH_SHA1); | |
39 | } | |
40 | ||
41 | static void expand_base_dir(char **out, const char *in, | |
42 | const char *base_dir, const char *def_in) | |
43 | { | |
44 | free(*out); | |
45 | if (in) | |
46 | *out = xstrdup(in); | |
47 | else | |
48 | *out = xstrfmt("%s/%s", base_dir, def_in); | |
49 | } | |
50 | ||
51 | static void repo_set_commondir(struct repository *repo, | |
52 | const char *commondir) | |
53 | { | |
54 | struct strbuf sb = STRBUF_INIT; | |
55 | ||
56 | free(repo->commondir); | |
57 | ||
58 | if (commondir) { | |
59 | repo->different_commondir = 1; | |
60 | repo->commondir = xstrdup(commondir); | |
61 | return; | |
62 | } | |
63 | ||
64 | repo->different_commondir = get_common_dir_noenv(&sb, repo->gitdir); | |
65 | repo->commondir = strbuf_detach(&sb, NULL); | |
66 | } | |
67 | ||
68 | void repo_set_gitdir(struct repository *repo, | |
69 | const char *root, | |
70 | const struct set_gitdir_args *o) | |
71 | { | |
72 | const char *gitfile = read_gitfile(root); | |
73 | /* | |
74 | * repo->gitdir is saved because the caller could pass "root" | |
75 | * that also points to repo->gitdir. We want to keep it alive | |
76 | * until after xstrdup(root). Then we can free it. | |
77 | */ | |
78 | char *old_gitdir = repo->gitdir; | |
79 | ||
80 | repo->gitdir = xstrdup(gitfile ? gitfile : root); | |
81 | free(old_gitdir); | |
82 | ||
83 | repo_set_commondir(repo, o->commondir); | |
84 | ||
85 | if (!repo->objects->odb) { | |
86 | CALLOC_ARRAY(repo->objects->odb, 1); | |
87 | repo->objects->odb_tail = &repo->objects->odb->next; | |
88 | } | |
89 | expand_base_dir(&repo->objects->odb->path, o->object_dir, | |
90 | repo->commondir, "objects"); | |
91 | ||
92 | repo->objects->odb->disable_ref_updates = o->disable_ref_updates; | |
93 | ||
94 | free(repo->objects->alternate_db); | |
95 | repo->objects->alternate_db = xstrdup_or_null(o->alternate_db); | |
96 | expand_base_dir(&repo->graft_file, o->graft_file, | |
97 | repo->commondir, "info/grafts"); | |
98 | expand_base_dir(&repo->index_file, o->index_file, | |
99 | repo->gitdir, "index"); | |
100 | } | |
101 | ||
102 | void repo_set_hash_algo(struct repository *repo, int hash_algo) | |
103 | { | |
104 | repo->hash_algo = &hash_algos[hash_algo]; | |
105 | } | |
106 | ||
107 | void repo_set_ref_storage_format(struct repository *repo, unsigned int format) | |
108 | { | |
109 | repo->ref_storage_format = format; | |
110 | } | |
111 | ||
112 | /* | |
113 | * Attempt to resolve and set the provided 'gitdir' for repository 'repo'. | |
114 | * Return 0 upon success and a non-zero value upon failure. | |
115 | */ | |
116 | static int repo_init_gitdir(struct repository *repo, const char *gitdir) | |
117 | { | |
118 | int ret = 0; | |
119 | int error = 0; | |
120 | char *abspath = NULL; | |
121 | const char *resolved_gitdir; | |
122 | struct set_gitdir_args args = { NULL }; | |
123 | ||
124 | abspath = real_pathdup(gitdir, 0); | |
125 | if (!abspath) { | |
126 | ret = -1; | |
127 | goto out; | |
128 | } | |
129 | ||
130 | /* 'gitdir' must reference the gitdir directly */ | |
131 | resolved_gitdir = resolve_gitdir_gently(abspath, &error); | |
132 | if (!resolved_gitdir) { | |
133 | ret = -1; | |
134 | goto out; | |
135 | } | |
136 | ||
137 | repo_set_gitdir(repo, resolved_gitdir, &args); | |
138 | ||
139 | out: | |
140 | free(abspath); | |
141 | return ret; | |
142 | } | |
143 | ||
144 | void repo_set_worktree(struct repository *repo, const char *path) | |
145 | { | |
146 | repo->worktree = real_pathdup(path, 1); | |
147 | ||
148 | trace2_def_repo(repo); | |
149 | } | |
150 | ||
151 | static int read_and_verify_repository_format(struct repository_format *format, | |
152 | const char *commondir) | |
153 | { | |
154 | int ret = 0; | |
155 | struct strbuf sb = STRBUF_INIT; | |
156 | ||
157 | strbuf_addf(&sb, "%s/config", commondir); | |
158 | read_repository_format(format, sb.buf); | |
159 | strbuf_reset(&sb); | |
160 | ||
161 | if (verify_repository_format(format, &sb) < 0) { | |
162 | warning("%s", sb.buf); | |
163 | ret = -1; | |
164 | } | |
165 | ||
166 | strbuf_release(&sb); | |
167 | return ret; | |
168 | } | |
169 | ||
170 | /* | |
171 | * Initialize 'repo' based on the provided 'gitdir'. | |
172 | * Return 0 upon success and a non-zero value upon failure. | |
173 | */ | |
174 | int repo_init(struct repository *repo, | |
175 | const char *gitdir, | |
176 | const char *worktree) | |
177 | { | |
178 | struct repository_format format = REPOSITORY_FORMAT_INIT; | |
179 | memset(repo, 0, sizeof(*repo)); | |
180 | ||
181 | repo->objects = raw_object_store_new(); | |
182 | repo->parsed_objects = parsed_object_pool_new(); | |
183 | repo->remote_state = remote_state_new(); | |
184 | ||
185 | if (repo_init_gitdir(repo, gitdir)) | |
186 | goto error; | |
187 | ||
188 | if (read_and_verify_repository_format(&format, repo->commondir)) | |
189 | goto error; | |
190 | ||
191 | repo_set_hash_algo(repo, format.hash_algo); | |
192 | repo_set_ref_storage_format(repo, format.ref_storage_format); | |
193 | repo->repository_format_worktree_config = format.worktree_config; | |
194 | ||
195 | /* take ownership of format.partial_clone */ | |
196 | repo->repository_format_partial_clone = format.partial_clone; | |
197 | format.partial_clone = NULL; | |
198 | ||
199 | if (worktree) | |
200 | repo_set_worktree(repo, worktree); | |
201 | ||
202 | clear_repository_format(&format); | |
203 | return 0; | |
204 | ||
205 | error: | |
206 | repo_clear(repo); | |
207 | return -1; | |
208 | } | |
209 | ||
210 | int repo_submodule_init(struct repository *subrepo, | |
211 | struct repository *superproject, | |
212 | const char *path, | |
213 | const struct object_id *treeish_name) | |
214 | { | |
215 | struct strbuf gitdir = STRBUF_INIT; | |
216 | struct strbuf worktree = STRBUF_INIT; | |
217 | int ret = 0; | |
218 | ||
219 | strbuf_repo_worktree_path(&gitdir, superproject, "%s/.git", path); | |
220 | strbuf_repo_worktree_path(&worktree, superproject, "%s", path); | |
221 | ||
222 | if (repo_init(subrepo, gitdir.buf, worktree.buf)) { | |
223 | /* | |
224 | * If initialization fails then it may be due to the submodule | |
225 | * not being populated in the superproject's worktree. Instead | |
226 | * we can try to initialize the submodule by finding it's gitdir | |
227 | * in the superproject's 'modules' directory. In this case the | |
228 | * submodule would not have a worktree. | |
229 | */ | |
230 | const struct submodule *sub = | |
231 | submodule_from_path(superproject, treeish_name, path); | |
232 | if (!sub) { | |
233 | ret = -1; | |
234 | goto out; | |
235 | } | |
236 | ||
237 | strbuf_reset(&gitdir); | |
238 | submodule_name_to_gitdir(&gitdir, superproject, sub->name); | |
239 | ||
240 | if (repo_init(subrepo, gitdir.buf, NULL)) { | |
241 | ret = -1; | |
242 | goto out; | |
243 | } | |
244 | } | |
245 | ||
246 | subrepo->submodule_prefix = xstrfmt("%s%s/", | |
247 | superproject->submodule_prefix ? | |
248 | superproject->submodule_prefix : | |
249 | "", path); | |
250 | ||
251 | out: | |
252 | strbuf_release(&gitdir); | |
253 | strbuf_release(&worktree); | |
254 | return ret; | |
255 | } | |
256 | ||
257 | static void repo_clear_path_cache(struct repo_path_cache *cache) | |
258 | { | |
259 | FREE_AND_NULL(cache->squash_msg); | |
260 | FREE_AND_NULL(cache->squash_msg); | |
261 | FREE_AND_NULL(cache->merge_msg); | |
262 | FREE_AND_NULL(cache->merge_rr); | |
263 | FREE_AND_NULL(cache->merge_mode); | |
264 | FREE_AND_NULL(cache->merge_head); | |
265 | FREE_AND_NULL(cache->merge_autostash); | |
266 | FREE_AND_NULL(cache->fetch_head); | |
267 | FREE_AND_NULL(cache->shallow); | |
268 | } | |
269 | ||
270 | void repo_clear(struct repository *repo) | |
271 | { | |
272 | FREE_AND_NULL(repo->gitdir); | |
273 | FREE_AND_NULL(repo->commondir); | |
274 | FREE_AND_NULL(repo->graft_file); | |
275 | FREE_AND_NULL(repo->index_file); | |
276 | FREE_AND_NULL(repo->worktree); | |
277 | FREE_AND_NULL(repo->submodule_prefix); | |
278 | ||
279 | raw_object_store_clear(repo->objects); | |
280 | FREE_AND_NULL(repo->objects); | |
281 | ||
282 | parsed_object_pool_clear(repo->parsed_objects); | |
283 | FREE_AND_NULL(repo->parsed_objects); | |
284 | ||
285 | if (repo->config) { | |
286 | git_configset_clear(repo->config); | |
287 | FREE_AND_NULL(repo->config); | |
288 | } | |
289 | ||
290 | if (repo->submodule_cache) { | |
291 | submodule_cache_free(repo->submodule_cache); | |
292 | repo->submodule_cache = NULL; | |
293 | } | |
294 | ||
295 | if (repo->index) { | |
296 | discard_index(repo->index); | |
297 | if (repo->index != &the_index) | |
298 | FREE_AND_NULL(repo->index); | |
299 | } | |
300 | ||
301 | if (repo->promisor_remote_config) { | |
302 | promisor_remote_clear(repo->promisor_remote_config); | |
303 | FREE_AND_NULL(repo->promisor_remote_config); | |
304 | } | |
305 | ||
306 | if (repo->remote_state) { | |
307 | remote_state_clear(repo->remote_state); | |
308 | FREE_AND_NULL(repo->remote_state); | |
309 | } | |
310 | ||
311 | repo_clear_path_cache(&repo->cached_paths); | |
312 | } | |
313 | ||
314 | int repo_read_index(struct repository *repo) | |
315 | { | |
316 | int res; | |
317 | ||
318 | /* Complete the double-reference */ | |
319 | if (!repo->index) { | |
320 | ALLOC_ARRAY(repo->index, 1); | |
321 | index_state_init(repo->index, repo); | |
322 | } else if (repo->index->repo != repo) { | |
323 | BUG("repo's index should point back at itself"); | |
324 | } | |
325 | ||
326 | res = read_index_from(repo->index, repo->index_file, repo->gitdir); | |
327 | ||
328 | prepare_repo_settings(repo); | |
329 | if (repo->settings.command_requires_full_index) | |
330 | ensure_full_index(repo->index); | |
331 | ||
332 | /* | |
333 | * If sparse checkouts are in use, check whether paths with the | |
334 | * SKIP_WORKTREE attribute are missing from the worktree; if not, | |
335 | * clear that attribute for that path. | |
336 | */ | |
337 | clear_skip_worktree_from_present_files(repo->index); | |
338 | ||
339 | return res; | |
340 | } | |
341 | ||
342 | int repo_hold_locked_index(struct repository *repo, | |
343 | struct lock_file *lf, | |
344 | int flags) | |
345 | { | |
346 | if (!repo->index_file) | |
347 | BUG("the repo hasn't been setup"); | |
348 | return hold_lock_file_for_update(lf, repo->index_file, flags); | |
349 | } |