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1 | #include "cache.h" | |
2 | #include "repository.h" | |
3 | #include "config.h" | |
4 | #include "submodule-config.h" | |
5 | ||
6 | /* The main repository */ | |
7 | static struct repository the_repo = { | |
8 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, &the_index, &hash_algos[GIT_HASH_SHA1], 0, 0 | |
9 | }; | |
10 | struct repository *the_repository = &the_repo; | |
11 | ||
12 | static char *git_path_from_env(const char *envvar, const char *git_dir, | |
13 | const char *path, int fromenv) | |
14 | { | |
15 | if (fromenv) { | |
16 | const char *value = getenv(envvar); | |
17 | if (value) | |
18 | return xstrdup(value); | |
19 | } | |
20 | ||
21 | return xstrfmt("%s/%s", git_dir, path); | |
22 | } | |
23 | ||
24 | static int find_common_dir(struct strbuf *sb, const char *gitdir, int fromenv) | |
25 | { | |
26 | if (fromenv) { | |
27 | const char *value = getenv(GIT_COMMON_DIR_ENVIRONMENT); | |
28 | if (value) { | |
29 | strbuf_addstr(sb, value); | |
30 | return 1; | |
31 | } | |
32 | } | |
33 | ||
34 | return get_common_dir_noenv(sb, gitdir); | |
35 | } | |
36 | ||
37 | static void repo_setup_env(struct repository *repo) | |
38 | { | |
39 | struct strbuf sb = STRBUF_INIT; | |
40 | ||
41 | repo->different_commondir = find_common_dir(&sb, repo->gitdir, | |
42 | !repo->ignore_env); | |
43 | free(repo->commondir); | |
44 | repo->commondir = strbuf_detach(&sb, NULL); | |
45 | free(repo->objectdir); | |
46 | repo->objectdir = git_path_from_env(DB_ENVIRONMENT, repo->commondir, | |
47 | "objects", !repo->ignore_env); | |
48 | free(repo->graft_file); | |
49 | repo->graft_file = git_path_from_env(GRAFT_ENVIRONMENT, repo->commondir, | |
50 | "info/grafts", !repo->ignore_env); | |
51 | free(repo->index_file); | |
52 | repo->index_file = git_path_from_env(INDEX_ENVIRONMENT, repo->gitdir, | |
53 | "index", !repo->ignore_env); | |
54 | } | |
55 | ||
56 | void repo_set_gitdir(struct repository *repo, const char *path) | |
57 | { | |
58 | const char *gitfile = read_gitfile(path); | |
59 | char *old_gitdir = repo->gitdir; | |
60 | ||
61 | repo->gitdir = xstrdup(gitfile ? gitfile : path); | |
62 | repo_setup_env(repo); | |
63 | ||
64 | free(old_gitdir); | |
65 | } | |
66 | ||
67 | void repo_set_hash_algo(struct repository *repo, int hash_algo) | |
68 | { | |
69 | repo->hash_algo = &hash_algos[hash_algo]; | |
70 | } | |
71 | ||
72 | /* | |
73 | * Attempt to resolve and set the provided 'gitdir' for repository 'repo'. | |
74 | * Return 0 upon success and a non-zero value upon failure. | |
75 | */ | |
76 | static int repo_init_gitdir(struct repository *repo, const char *gitdir) | |
77 | { | |
78 | int ret = 0; | |
79 | int error = 0; | |
80 | char *abspath = NULL; | |
81 | const char *resolved_gitdir; | |
82 | ||
83 | abspath = real_pathdup(gitdir, 0); | |
84 | if (!abspath) { | |
85 | ret = -1; | |
86 | goto out; | |
87 | } | |
88 | ||
89 | /* 'gitdir' must reference the gitdir directly */ | |
90 | resolved_gitdir = resolve_gitdir_gently(abspath, &error); | |
91 | if (!resolved_gitdir) { | |
92 | ret = -1; | |
93 | goto out; | |
94 | } | |
95 | ||
96 | repo_set_gitdir(repo, resolved_gitdir); | |
97 | ||
98 | out: | |
99 | free(abspath); | |
100 | return ret; | |
101 | } | |
102 | ||
103 | void repo_set_worktree(struct repository *repo, const char *path) | |
104 | { | |
105 | repo->worktree = real_pathdup(path, 1); | |
106 | } | |
107 | ||
108 | static int read_and_verify_repository_format(struct repository_format *format, | |
109 | const char *commondir) | |
110 | { | |
111 | int ret = 0; | |
112 | struct strbuf sb = STRBUF_INIT; | |
113 | ||
114 | strbuf_addf(&sb, "%s/config", commondir); | |
115 | read_repository_format(format, sb.buf); | |
116 | strbuf_reset(&sb); | |
117 | ||
118 | if (verify_repository_format(format, &sb) < 0) { | |
119 | warning("%s", sb.buf); | |
120 | ret = -1; | |
121 | } | |
122 | ||
123 | strbuf_release(&sb); | |
124 | return ret; | |
125 | } | |
126 | ||
127 | /* | |
128 | * Initialize 'repo' based on the provided 'gitdir'. | |
129 | * Return 0 upon success and a non-zero value upon failure. | |
130 | */ | |
131 | int repo_init(struct repository *repo, const char *gitdir, const char *worktree) | |
132 | { | |
133 | struct repository_format format; | |
134 | memset(repo, 0, sizeof(*repo)); | |
135 | ||
136 | repo->ignore_env = 1; | |
137 | ||
138 | if (repo_init_gitdir(repo, gitdir)) | |
139 | goto error; | |
140 | ||
141 | if (read_and_verify_repository_format(&format, repo->commondir)) | |
142 | goto error; | |
143 | ||
144 | repo_set_hash_algo(repo, format.hash_algo); | |
145 | ||
146 | if (worktree) | |
147 | repo_set_worktree(repo, worktree); | |
148 | ||
149 | return 0; | |
150 | ||
151 | error: | |
152 | repo_clear(repo); | |
153 | return -1; | |
154 | } | |
155 | ||
156 | /* | |
157 | * Initialize 'submodule' as the submodule given by 'path' in parent repository | |
158 | * 'superproject'. | |
159 | * Return 0 upon success and a non-zero value upon failure. | |
160 | */ | |
161 | int repo_submodule_init(struct repository *submodule, | |
162 | struct repository *superproject, | |
163 | const char *path) | |
164 | { | |
165 | const struct submodule *sub; | |
166 | struct strbuf gitdir = STRBUF_INIT; | |
167 | struct strbuf worktree = STRBUF_INIT; | |
168 | int ret = 0; | |
169 | ||
170 | sub = submodule_from_cache(superproject, &null_oid, path); | |
171 | if (!sub) { | |
172 | ret = -1; | |
173 | goto out; | |
174 | } | |
175 | ||
176 | strbuf_repo_worktree_path(&gitdir, superproject, "%s/.git", path); | |
177 | strbuf_repo_worktree_path(&worktree, superproject, "%s", path); | |
178 | ||
179 | if (repo_init(submodule, gitdir.buf, worktree.buf)) { | |
180 | /* | |
181 | * If initilization fails then it may be due to the submodule | |
182 | * not being populated in the superproject's worktree. Instead | |
183 | * we can try to initilize the submodule by finding it's gitdir | |
184 | * in the superproject's 'modules' directory. In this case the | |
185 | * submodule would not have a worktree. | |
186 | */ | |
187 | strbuf_reset(&gitdir); | |
188 | strbuf_repo_git_path(&gitdir, superproject, | |
189 | "modules/%s", sub->name); | |
190 | ||
191 | if (repo_init(submodule, gitdir.buf, NULL)) { | |
192 | ret = -1; | |
193 | goto out; | |
194 | } | |
195 | } | |
196 | ||
197 | submodule->submodule_prefix = xstrfmt("%s%s/", | |
198 | superproject->submodule_prefix ? | |
199 | superproject->submodule_prefix : | |
200 | "", path); | |
201 | ||
202 | out: | |
203 | strbuf_release(&gitdir); | |
204 | strbuf_release(&worktree); | |
205 | return ret; | |
206 | } | |
207 | ||
208 | void repo_clear(struct repository *repo) | |
209 | { | |
210 | FREE_AND_NULL(repo->gitdir); | |
211 | FREE_AND_NULL(repo->commondir); | |
212 | FREE_AND_NULL(repo->objectdir); | |
213 | FREE_AND_NULL(repo->graft_file); | |
214 | FREE_AND_NULL(repo->index_file); | |
215 | FREE_AND_NULL(repo->worktree); | |
216 | FREE_AND_NULL(repo->submodule_prefix); | |
217 | ||
218 | if (repo->config) { | |
219 | git_configset_clear(repo->config); | |
220 | FREE_AND_NULL(repo->config); | |
221 | } | |
222 | ||
223 | if (repo->submodule_cache) { | |
224 | submodule_cache_free(repo->submodule_cache); | |
225 | repo->submodule_cache = NULL; | |
226 | } | |
227 | ||
228 | if (repo->index) { | |
229 | discard_index(repo->index); | |
230 | FREE_AND_NULL(repo->index); | |
231 | } | |
232 | } | |
233 | ||
234 | int repo_read_index(struct repository *repo) | |
235 | { | |
236 | if (!repo->index) | |
237 | repo->index = xcalloc(1, sizeof(*repo->index)); | |
238 | ||
239 | return read_index_from(repo->index, repo->index_file, repo->gitdir); | |
240 | } |