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Commit | Line | Data |
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359efeff BW |
1 | #include "cache.h" |
2 | #include "repository.h" | |
3b256228 | 3 | #include "config.h" |
bf12fcdf | 4 | #include "submodule-config.h" |
359efeff BW |
5 | |
6 | /* The main repository */ | |
b2f0ecee NTND |
7 | static struct repository the_repo; |
8 | struct repository *the_repository; | |
9 | ||
10 | void initialize_the_repository(void) | |
11 | { | |
12 | the_repository = &the_repo; | |
13 | ||
14 | the_repo.index = &the_index; | |
15 | repo_set_hash_algo(&the_repo, GIT_HASH_SHA1); | |
16 | } | |
359efeff | 17 | |
357a03eb NTND |
18 | static void expand_base_dir(char **out, const char *in, |
19 | const char *base_dir, const char *def_in) | |
20 | { | |
21 | free(*out); | |
22 | if (in) | |
23 | *out = xstrdup(in); | |
24 | else | |
25 | *out = xstrfmt("%s/%s", base_dir, def_in); | |
26 | } | |
27 | ||
28 | static void repo_set_commondir(struct repository *repo, | |
29 | const char *commondir) | |
359efeff BW |
30 | { |
31 | struct strbuf sb = STRBUF_INIT; | |
32 | ||
f9b7573f | 33 | free(repo->commondir); |
357a03eb NTND |
34 | |
35 | if (commondir) { | |
36 | repo->different_commondir = 1; | |
37 | repo->commondir = xstrdup(commondir); | |
38 | return; | |
39 | } | |
40 | ||
41 | repo->different_commondir = get_common_dir_noenv(&sb, repo->gitdir); | |
359efeff | 42 | repo->commondir = strbuf_detach(&sb, NULL); |
359efeff BW |
43 | } |
44 | ||
357a03eb NTND |
45 | void repo_set_gitdir(struct repository *repo, |
46 | const char *root, | |
47 | const struct set_gitdir_args *o) | |
359efeff | 48 | { |
357a03eb NTND |
49 | const char *gitfile = read_gitfile(root); |
50 | /* | |
51 | * repo->gitdir is saved because the caller could pass "root" | |
52 | * that also points to repo->gitdir. We want to keep it alive | |
53 | * until after xstrdup(root). Then we can free it. | |
54 | */ | |
1fb2b636 | 55 | char *old_gitdir = repo->gitdir; |
359efeff | 56 | |
357a03eb | 57 | repo->gitdir = xstrdup(gitfile ? gitfile : root); |
1fb2b636 | 58 | free(old_gitdir); |
357a03eb NTND |
59 | |
60 | repo_set_commondir(repo, o->commondir); | |
61 | expand_base_dir(&repo->objectdir, o->object_dir, | |
62 | repo->commondir, "objects"); | |
7bc0dcaa NTND |
63 | free(repo->alternate_db); |
64 | repo->alternate_db = xstrdup_or_null(o->alternate_db); | |
357a03eb NTND |
65 | expand_base_dir(&repo->graft_file, o->graft_file, |
66 | repo->commondir, "info/grafts"); | |
67 | expand_base_dir(&repo->index_file, o->index_file, | |
68 | repo->gitdir, "index"); | |
359efeff BW |
69 | } |
70 | ||
78a67668 | 71 | void repo_set_hash_algo(struct repository *repo, int hash_algo) |
72 | { | |
73 | repo->hash_algo = &hash_algos[hash_algo]; | |
74 | } | |
75 | ||
359efeff BW |
76 | /* |
77 | * Attempt to resolve and set the provided 'gitdir' for repository 'repo'. | |
78 | * Return 0 upon success and a non-zero value upon failure. | |
79 | */ | |
80 | static int repo_init_gitdir(struct repository *repo, const char *gitdir) | |
81 | { | |
82 | int ret = 0; | |
83 | int error = 0; | |
84 | char *abspath = NULL; | |
85 | const char *resolved_gitdir; | |
357a03eb | 86 | struct set_gitdir_args args = { NULL }; |
359efeff BW |
87 | |
88 | abspath = real_pathdup(gitdir, 0); | |
89 | if (!abspath) { | |
90 | ret = -1; | |
91 | goto out; | |
92 | } | |
93 | ||
94 | /* 'gitdir' must reference the gitdir directly */ | |
95 | resolved_gitdir = resolve_gitdir_gently(abspath, &error); | |
96 | if (!resolved_gitdir) { | |
97 | ret = -1; | |
98 | goto out; | |
99 | } | |
100 | ||
357a03eb | 101 | repo_set_gitdir(repo, resolved_gitdir, &args); |
359efeff BW |
102 | |
103 | out: | |
104 | free(abspath); | |
105 | return ret; | |
106 | } | |
107 | ||
108 | void repo_set_worktree(struct repository *repo, const char *path) | |
109 | { | |
110 | repo->worktree = real_pathdup(path, 1); | |
111 | } | |
112 | ||
113 | static int read_and_verify_repository_format(struct repository_format *format, | |
114 | const char *commondir) | |
115 | { | |
116 | int ret = 0; | |
117 | struct strbuf sb = STRBUF_INIT; | |
118 | ||
119 | strbuf_addf(&sb, "%s/config", commondir); | |
120 | read_repository_format(format, sb.buf); | |
121 | strbuf_reset(&sb); | |
122 | ||
123 | if (verify_repository_format(format, &sb) < 0) { | |
124 | warning("%s", sb.buf); | |
125 | ret = -1; | |
126 | } | |
127 | ||
128 | strbuf_release(&sb); | |
129 | return ret; | |
130 | } | |
131 | ||
132 | /* | |
133 | * Initialize 'repo' based on the provided 'gitdir'. | |
134 | * Return 0 upon success and a non-zero value upon failure. | |
135 | */ | |
b2f0ecee NTND |
136 | static int repo_init(struct repository *repo, |
137 | const char *gitdir, | |
138 | const char *worktree) | |
359efeff BW |
139 | { |
140 | struct repository_format format; | |
141 | memset(repo, 0, sizeof(*repo)); | |
142 | ||
359efeff BW |
143 | if (repo_init_gitdir(repo, gitdir)) |
144 | goto error; | |
145 | ||
146 | if (read_and_verify_repository_format(&format, repo->commondir)) | |
147 | goto error; | |
148 | ||
78a67668 | 149 | repo_set_hash_algo(repo, format.hash_algo); |
150 | ||
359efeff BW |
151 | if (worktree) |
152 | repo_set_worktree(repo, worktree); | |
153 | ||
154 | return 0; | |
155 | ||
156 | error: | |
157 | repo_clear(repo); | |
158 | return -1; | |
159 | } | |
160 | ||
96dc883b BW |
161 | /* |
162 | * Initialize 'submodule' as the submodule given by 'path' in parent repository | |
163 | * 'superproject'. | |
164 | * Return 0 upon success and a non-zero value upon failure. | |
165 | */ | |
166 | int repo_submodule_init(struct repository *submodule, | |
167 | struct repository *superproject, | |
168 | const char *path) | |
169 | { | |
170 | const struct submodule *sub; | |
171 | struct strbuf gitdir = STRBUF_INIT; | |
172 | struct strbuf worktree = STRBUF_INIT; | |
173 | int ret = 0; | |
174 | ||
cd73de47 | 175 | sub = submodule_from_cache(superproject, &null_oid, path); |
96dc883b BW |
176 | if (!sub) { |
177 | ret = -1; | |
178 | goto out; | |
179 | } | |
180 | ||
181 | strbuf_repo_worktree_path(&gitdir, superproject, "%s/.git", path); | |
182 | strbuf_repo_worktree_path(&worktree, superproject, "%s", path); | |
183 | ||
184 | if (repo_init(submodule, gitdir.buf, worktree.buf)) { | |
185 | /* | |
186 | * If initilization fails then it may be due to the submodule | |
187 | * not being populated in the superproject's worktree. Instead | |
188 | * we can try to initilize the submodule by finding it's gitdir | |
189 | * in the superproject's 'modules' directory. In this case the | |
190 | * submodule would not have a worktree. | |
191 | */ | |
192 | strbuf_reset(&gitdir); | |
193 | strbuf_repo_git_path(&gitdir, superproject, | |
194 | "modules/%s", sub->name); | |
195 | ||
196 | if (repo_init(submodule, gitdir.buf, NULL)) { | |
197 | ret = -1; | |
198 | goto out; | |
199 | } | |
200 | } | |
201 | ||
202 | submodule->submodule_prefix = xstrfmt("%s%s/", | |
203 | superproject->submodule_prefix ? | |
204 | superproject->submodule_prefix : | |
205 | "", path); | |
206 | ||
207 | out: | |
208 | strbuf_release(&gitdir); | |
209 | strbuf_release(&worktree); | |
210 | return ret; | |
211 | } | |
212 | ||
359efeff BW |
213 | void repo_clear(struct repository *repo) |
214 | { | |
90dd04aa RS |
215 | FREE_AND_NULL(repo->gitdir); |
216 | FREE_AND_NULL(repo->commondir); | |
217 | FREE_AND_NULL(repo->objectdir); | |
7bc0dcaa | 218 | FREE_AND_NULL(repo->alternate_db); |
90dd04aa RS |
219 | FREE_AND_NULL(repo->graft_file); |
220 | FREE_AND_NULL(repo->index_file); | |
221 | FREE_AND_NULL(repo->worktree); | |
222 | FREE_AND_NULL(repo->submodule_prefix); | |
3b256228 BW |
223 | |
224 | if (repo->config) { | |
225 | git_configset_clear(repo->config); | |
90dd04aa | 226 | FREE_AND_NULL(repo->config); |
3b256228 | 227 | } |
639e30b5 | 228 | |
bf12fcdf BW |
229 | if (repo->submodule_cache) { |
230 | submodule_cache_free(repo->submodule_cache); | |
231 | repo->submodule_cache = NULL; | |
232 | } | |
233 | ||
639e30b5 BW |
234 | if (repo->index) { |
235 | discard_index(repo->index); | |
90dd04aa | 236 | FREE_AND_NULL(repo->index); |
639e30b5 BW |
237 | } |
238 | } | |
239 | ||
240 | int repo_read_index(struct repository *repo) | |
241 | { | |
242 | if (!repo->index) | |
243 | repo->index = xcalloc(1, sizeof(*repo->index)); | |
639e30b5 | 244 | |
a125a223 | 245 | return read_index_from(repo->index, repo->index_file, repo->gitdir); |
359efeff | 246 | } |