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