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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_COMPATIBILITY_MACROS | |
6 | #include "cache.h" | |
7 | #include "repository.h" | |
8 | #include "object-store.h" | |
9 | #include "config.h" | |
10 | #include "object.h" | |
11 | #include "lockfile.h" | |
12 | #include "submodule-config.h" | |
13 | ||
14 | /* The main repository */ | |
15 | static struct repository the_repo; | |
16 | struct repository *the_repository; | |
17 | struct index_state the_index; | |
18 | ||
19 | void initialize_the_repository(void) | |
20 | { | |
21 | the_repository = &the_repo; | |
22 | ||
23 | the_repo.index = &the_index; | |
24 | the_repo.objects = raw_object_store_new(); | |
25 | the_repo.parsed_objects = parsed_object_pool_new(); | |
26 | ||
27 | repo_set_hash_algo(&the_repo, GIT_HASH_SHA1); | |
28 | } | |
29 | ||
30 | static void expand_base_dir(char **out, const char *in, | |
31 | const char *base_dir, const char *def_in) | |
32 | { | |
33 | free(*out); | |
34 | if (in) | |
35 | *out = xstrdup(in); | |
36 | else | |
37 | *out = xstrfmt("%s/%s", base_dir, def_in); | |
38 | } | |
39 | ||
40 | static void repo_set_commondir(struct repository *repo, | |
41 | const char *commondir) | |
42 | { | |
43 | struct strbuf sb = STRBUF_INIT; | |
44 | ||
45 | free(repo->commondir); | |
46 | ||
47 | if (commondir) { | |
48 | repo->different_commondir = 1; | |
49 | repo->commondir = xstrdup(commondir); | |
50 | return; | |
51 | } | |
52 | ||
53 | repo->different_commondir = get_common_dir_noenv(&sb, repo->gitdir); | |
54 | repo->commondir = strbuf_detach(&sb, NULL); | |
55 | } | |
56 | ||
57 | void repo_set_gitdir(struct repository *repo, | |
58 | const char *root, | |
59 | const struct set_gitdir_args *o) | |
60 | { | |
61 | const char *gitfile = read_gitfile(root); | |
62 | /* | |
63 | * repo->gitdir is saved because the caller could pass "root" | |
64 | * that also points to repo->gitdir. We want to keep it alive | |
65 | * until after xstrdup(root). Then we can free it. | |
66 | */ | |
67 | char *old_gitdir = repo->gitdir; | |
68 | ||
69 | repo->gitdir = xstrdup(gitfile ? gitfile : root); | |
70 | free(old_gitdir); | |
71 | ||
72 | repo_set_commondir(repo, o->commondir); | |
73 | ||
74 | if (!repo->objects->odb) { | |
75 | repo->objects->odb = xcalloc(1, sizeof(*repo->objects->odb)); | |
76 | repo->objects->odb_tail = &repo->objects->odb->next; | |
77 | } | |
78 | expand_base_dir(&repo->objects->odb->path, o->object_dir, | |
79 | repo->commondir, "objects"); | |
80 | ||
81 | free(repo->objects->alternate_db); | |
82 | repo->objects->alternate_db = xstrdup_or_null(o->alternate_db); | |
83 | expand_base_dir(&repo->graft_file, o->graft_file, | |
84 | repo->commondir, "info/grafts"); | |
85 | expand_base_dir(&repo->index_file, o->index_file, | |
86 | repo->gitdir, "index"); | |
87 | } | |
88 | ||
89 | void repo_set_hash_algo(struct repository *repo, int hash_algo) | |
90 | { | |
91 | repo->hash_algo = &hash_algos[hash_algo]; | |
92 | } | |
93 | ||
94 | /* | |
95 | * Attempt to resolve and set the provided 'gitdir' for repository 'repo'. | |
96 | * Return 0 upon success and a non-zero value upon failure. | |
97 | */ | |
98 | static int repo_init_gitdir(struct repository *repo, const char *gitdir) | |
99 | { | |
100 | int ret = 0; | |
101 | int error = 0; | |
102 | char *abspath = NULL; | |
103 | const char *resolved_gitdir; | |
104 | struct set_gitdir_args args = { NULL }; | |
105 | ||
106 | abspath = real_pathdup(gitdir, 0); | |
107 | if (!abspath) { | |
108 | ret = -1; | |
109 | goto out; | |
110 | } | |
111 | ||
112 | /* 'gitdir' must reference the gitdir directly */ | |
113 | resolved_gitdir = resolve_gitdir_gently(abspath, &error); | |
114 | if (!resolved_gitdir) { | |
115 | ret = -1; | |
116 | goto out; | |
117 | } | |
118 | ||
119 | repo_set_gitdir(repo, resolved_gitdir, &args); | |
120 | ||
121 | out: | |
122 | free(abspath); | |
123 | return ret; | |
124 | } | |
125 | ||
126 | void repo_set_worktree(struct repository *repo, const char *path) | |
127 | { | |
128 | repo->worktree = real_pathdup(path, 1); | |
129 | ||
130 | trace2_def_repo(repo); | |
131 | } | |
132 | ||
133 | static int read_and_verify_repository_format(struct repository_format *format, | |
134 | const char *commondir) | |
135 | { | |
136 | int ret = 0; | |
137 | struct strbuf sb = STRBUF_INIT; | |
138 | ||
139 | strbuf_addf(&sb, "%s/config", commondir); | |
140 | read_repository_format(format, sb.buf); | |
141 | strbuf_reset(&sb); | |
142 | ||
143 | if (verify_repository_format(format, &sb) < 0) { | |
144 | warning("%s", sb.buf); | |
145 | ret = -1; | |
146 | } | |
147 | ||
148 | strbuf_release(&sb); | |
149 | return ret; | |
150 | } | |
151 | ||
152 | /* | |
153 | * Initialize 'repo' based on the provided 'gitdir'. | |
154 | * Return 0 upon success and a non-zero value upon failure. | |
155 | */ | |
156 | int repo_init(struct repository *repo, | |
157 | const char *gitdir, | |
158 | const char *worktree) | |
159 | { | |
160 | struct repository_format format = REPOSITORY_FORMAT_INIT; | |
161 | memset(repo, 0, sizeof(*repo)); | |
162 | ||
163 | repo->objects = raw_object_store_new(); | |
164 | repo->parsed_objects = parsed_object_pool_new(); | |
165 | ||
166 | if (repo_init_gitdir(repo, gitdir)) | |
167 | goto error; | |
168 | ||
169 | if (read_and_verify_repository_format(&format, repo->commondir)) | |
170 | goto error; | |
171 | ||
172 | repo_set_hash_algo(repo, format.hash_algo); | |
173 | ||
174 | if (worktree) | |
175 | repo_set_worktree(repo, worktree); | |
176 | ||
177 | clear_repository_format(&format); | |
178 | return 0; | |
179 | ||
180 | error: | |
181 | repo_clear(repo); | |
182 | return -1; | |
183 | } | |
184 | ||
185 | int repo_submodule_init(struct repository *subrepo, | |
186 | struct repository *superproject, | |
187 | const struct submodule *sub) | |
188 | { | |
189 | struct strbuf gitdir = STRBUF_INIT; | |
190 | struct strbuf worktree = STRBUF_INIT; | |
191 | int ret = 0; | |
192 | ||
193 | if (!sub) { | |
194 | ret = -1; | |
195 | goto out; | |
196 | } | |
197 | ||
198 | strbuf_repo_worktree_path(&gitdir, superproject, "%s/.git", sub->path); | |
199 | strbuf_repo_worktree_path(&worktree, superproject, "%s", sub->path); | |
200 | ||
201 | if (repo_init(subrepo, gitdir.buf, worktree.buf)) { | |
202 | /* | |
203 | * If initialization fails then it may be due to the submodule | |
204 | * not being populated in the superproject's worktree. Instead | |
205 | * we can try to initialize the submodule by finding it's gitdir | |
206 | * in the superproject's 'modules' directory. In this case the | |
207 | * submodule would not have a worktree. | |
208 | */ | |
209 | strbuf_reset(&gitdir); | |
210 | strbuf_repo_git_path(&gitdir, superproject, | |
211 | "modules/%s", sub->name); | |
212 | ||
213 | if (repo_init(subrepo, gitdir.buf, NULL)) { | |
214 | ret = -1; | |
215 | goto out; | |
216 | } | |
217 | } | |
218 | ||
219 | subrepo->submodule_prefix = xstrfmt("%s%s/", | |
220 | superproject->submodule_prefix ? | |
221 | superproject->submodule_prefix : | |
222 | "", sub->path); | |
223 | ||
224 | out: | |
225 | strbuf_release(&gitdir); | |
226 | strbuf_release(&worktree); | |
227 | return ret; | |
228 | } | |
229 | ||
230 | void repo_clear(struct repository *repo) | |
231 | { | |
232 | FREE_AND_NULL(repo->gitdir); | |
233 | FREE_AND_NULL(repo->commondir); | |
234 | FREE_AND_NULL(repo->graft_file); | |
235 | FREE_AND_NULL(repo->index_file); | |
236 | FREE_AND_NULL(repo->worktree); | |
237 | FREE_AND_NULL(repo->submodule_prefix); | |
238 | ||
239 | raw_object_store_clear(repo->objects); | |
240 | FREE_AND_NULL(repo->objects); | |
241 | ||
242 | parsed_object_pool_clear(repo->parsed_objects); | |
243 | FREE_AND_NULL(repo->parsed_objects); | |
244 | ||
245 | if (repo->config) { | |
246 | git_configset_clear(repo->config); | |
247 | FREE_AND_NULL(repo->config); | |
248 | } | |
249 | ||
250 | if (repo->submodule_cache) { | |
251 | submodule_cache_free(repo->submodule_cache); | |
252 | repo->submodule_cache = NULL; | |
253 | } | |
254 | ||
255 | if (repo->index) { | |
256 | discard_index(repo->index); | |
257 | if (repo->index != &the_index) | |
258 | FREE_AND_NULL(repo->index); | |
259 | } | |
260 | } | |
261 | ||
262 | int repo_read_index(struct repository *repo) | |
263 | { | |
264 | if (!repo->index) | |
265 | repo->index = xcalloc(1, sizeof(*repo->index)); | |
266 | ||
267 | return read_index_from(repo->index, repo->index_file, repo->gitdir); | |
268 | } | |
269 | ||
270 | int repo_hold_locked_index(struct repository *repo, | |
271 | struct lock_file *lf, | |
272 | int flags) | |
273 | { | |
274 | if (!repo->index_file) | |
275 | BUG("the repo hasn't been setup"); | |
276 | return hold_lock_file_for_update(lf, repo->index_file, flags); | |
277 | } |