Merge branch 'cb/test-lint-cp-a'
[git.git] / repository.c
blob7b02e1dffac077d0c21ecaef915f4ea33abc57bc
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"
8 /* The main repository */
9 static struct repository the_repo;
10 struct repository *the_repository;
12 void initialize_the_repository(void)
14 the_repository = &the_repo;
16 the_repo.index = &the_index;
17 the_repo.objects = raw_object_store_new();
18 the_repo.parsed_objects = parsed_object_pool_new();
20 repo_set_hash_algo(&the_repo, GIT_HASH_SHA1);
23 static void expand_base_dir(char **out, const char *in,
24 const char *base_dir, const char *def_in)
26 free(*out);
27 if (in)
28 *out = xstrdup(in);
29 else
30 *out = xstrfmt("%s/%s", base_dir, def_in);
33 static void repo_set_commondir(struct repository *repo,
34 const char *commondir)
36 struct strbuf sb = STRBUF_INIT;
38 free(repo->commondir);
40 if (commondir) {
41 repo->different_commondir = 1;
42 repo->commondir = xstrdup(commondir);
43 return;
46 repo->different_commondir = get_common_dir_noenv(&sb, repo->gitdir);
47 repo->commondir = strbuf_detach(&sb, NULL);
50 void repo_set_gitdir(struct repository *repo,
51 const char *root,
52 const struct set_gitdir_args *o)
54 const char *gitfile = read_gitfile(root);
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.
60 char *old_gitdir = repo->gitdir;
62 repo->gitdir = xstrdup(gitfile ? gitfile : root);
63 free(old_gitdir);
65 repo_set_commondir(repo, o->commondir);
67 if (!repo->objects->odb) {
68 repo->objects->odb = xcalloc(1, sizeof(*repo->objects->odb));
69 repo->objects->odb_tail = &repo->objects->odb->next;
71 expand_base_dir(&repo->objects->odb->path, o->object_dir,
72 repo->commondir, "objects");
74 free(repo->objects->alternate_db);
75 repo->objects->alternate_db = xstrdup_or_null(o->alternate_db);
76 expand_base_dir(&repo->graft_file, o->graft_file,
77 repo->commondir, "info/grafts");
78 expand_base_dir(&repo->index_file, o->index_file,
79 repo->gitdir, "index");
82 void repo_set_hash_algo(struct repository *repo, int hash_algo)
84 repo->hash_algo = &hash_algos[hash_algo];
88 * Attempt to resolve and set the provided 'gitdir' for repository 'repo'.
89 * Return 0 upon success and a non-zero value upon failure.
91 static int repo_init_gitdir(struct repository *repo, const char *gitdir)
93 int ret = 0;
94 int error = 0;
95 char *abspath = NULL;
96 const char *resolved_gitdir;
97 struct set_gitdir_args args = { NULL };
99 abspath = real_pathdup(gitdir, 0);
100 if (!abspath) {
101 ret = -1;
102 goto out;
105 /* 'gitdir' must reference the gitdir directly */
106 resolved_gitdir = resolve_gitdir_gently(abspath, &error);
107 if (!resolved_gitdir) {
108 ret = -1;
109 goto out;
112 repo_set_gitdir(repo, resolved_gitdir, &args);
114 out:
115 free(abspath);
116 return ret;
119 void repo_set_worktree(struct repository *repo, const char *path)
121 repo->worktree = real_pathdup(path, 1);
124 static int read_and_verify_repository_format(struct repository_format *format,
125 const char *commondir)
127 int ret = 0;
128 struct strbuf sb = STRBUF_INIT;
130 strbuf_addf(&sb, "%s/config", commondir);
131 read_repository_format(format, sb.buf);
132 strbuf_reset(&sb);
134 if (verify_repository_format(format, &sb) < 0) {
135 warning("%s", sb.buf);
136 ret = -1;
139 strbuf_release(&sb);
140 return ret;
144 * Initialize 'repo' based on the provided 'gitdir'.
145 * Return 0 upon success and a non-zero value upon failure.
147 int repo_init(struct repository *repo,
148 const char *gitdir,
149 const char *worktree)
151 struct repository_format format;
152 memset(repo, 0, sizeof(*repo));
154 repo->objects = raw_object_store_new();
155 repo->parsed_objects = parsed_object_pool_new();
157 if (repo_init_gitdir(repo, gitdir))
158 goto error;
160 if (read_and_verify_repository_format(&format, repo->commondir))
161 goto error;
163 repo_set_hash_algo(repo, format.hash_algo);
165 if (worktree)
166 repo_set_worktree(repo, worktree);
168 return 0;
170 error:
171 repo_clear(repo);
172 return -1;
176 * Initialize 'submodule' as the submodule given by 'path' in parent repository
177 * 'superproject'.
178 * Return 0 upon success and a non-zero value upon failure.
180 int repo_submodule_init(struct repository *submodule,
181 struct repository *superproject,
182 const char *path)
184 const struct submodule *sub;
185 struct strbuf gitdir = STRBUF_INIT;
186 struct strbuf worktree = STRBUF_INIT;
187 int ret = 0;
189 sub = submodule_from_path(superproject, &null_oid, path);
190 if (!sub) {
191 ret = -1;
192 goto out;
195 strbuf_repo_worktree_path(&gitdir, superproject, "%s/.git", path);
196 strbuf_repo_worktree_path(&worktree, superproject, "%s", path);
198 if (repo_init(submodule, gitdir.buf, worktree.buf)) {
200 * If initilization fails then it may be due to the submodule
201 * not being populated in the superproject's worktree. Instead
202 * we can try to initilize the submodule by finding it's gitdir
203 * in the superproject's 'modules' directory. In this case the
204 * submodule would not have a worktree.
206 strbuf_reset(&gitdir);
207 strbuf_repo_git_path(&gitdir, superproject,
208 "modules/%s", sub->name);
210 if (repo_init(submodule, gitdir.buf, NULL)) {
211 ret = -1;
212 goto out;
216 submodule->submodule_prefix = xstrfmt("%s%s/",
217 superproject->submodule_prefix ?
218 superproject->submodule_prefix :
219 "", path);
221 out:
222 strbuf_release(&gitdir);
223 strbuf_release(&worktree);
224 return ret;
227 void repo_clear(struct repository *repo)
229 FREE_AND_NULL(repo->gitdir);
230 FREE_AND_NULL(repo->commondir);
231 FREE_AND_NULL(repo->graft_file);
232 FREE_AND_NULL(repo->index_file);
233 FREE_AND_NULL(repo->worktree);
234 FREE_AND_NULL(repo->submodule_prefix);
236 raw_object_store_clear(repo->objects);
237 FREE_AND_NULL(repo->objects);
239 parsed_object_pool_clear(repo->parsed_objects);
240 FREE_AND_NULL(repo->parsed_objects);
242 if (repo->config) {
243 git_configset_clear(repo->config);
244 FREE_AND_NULL(repo->config);
247 if (repo->submodule_cache) {
248 submodule_cache_free(repo->submodule_cache);
249 repo->submodule_cache = NULL;
252 if (repo->index) {
253 discard_index(repo->index);
254 if (repo->index != &the_index)
255 FREE_AND_NULL(repo->index);
259 int repo_read_index(struct repository *repo)
261 if (!repo->index)
262 repo->index = xcalloc(1, sizeof(*repo->index));
264 return read_index_from(repo->index, repo->index_file, repo->gitdir);