submodule: store OIDs in changed_submodule_names
[git/git.git] / repository.c
CommitLineData
359efeff
BW
1#include "cache.h"
2#include "repository.h"
90c62155 3#include "object-store.h"
3b256228 4#include "config.h"
99bf115c 5#include "object.h"
bf12fcdf 6#include "submodule-config.h"
359efeff
BW
7
8/* The main repository */
b2f0ecee
NTND
9static struct repository the_repo;
10struct repository *the_repository;
11
12void initialize_the_repository(void)
13{
14 the_repository = &the_repo;
15
16 the_repo.index = &the_index;
90c62155 17 the_repo.objects = raw_object_store_new();
99bf115c
SB
18 the_repo.parsed_objects = parsed_object_pool_new();
19
b2f0ecee
NTND
20 repo_set_hash_algo(&the_repo, GIT_HASH_SHA1);
21}
359efeff 22
357a03eb
NTND
23static 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
33static void repo_set_commondir(struct repository *repo,
34 const char *commondir)
359efeff
BW
35{
36 struct strbuf sb = STRBUF_INIT;
37
f9b7573f 38 free(repo->commondir);
357a03eb
NTND
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);
359efeff 47 repo->commondir = strbuf_detach(&sb, NULL);
359efeff
BW
48}
49
357a03eb
NTND
50void repo_set_gitdir(struct repository *repo,
51 const char *root,
52 const struct set_gitdir_args *o)
359efeff 53{
357a03eb
NTND
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 */
1fb2b636 60 char *old_gitdir = repo->gitdir;
359efeff 61
357a03eb 62 repo->gitdir = xstrdup(gitfile ? gitfile : root);
1fb2b636 63 free(old_gitdir);
357a03eb
NTND
64
65 repo_set_commondir(repo, o->commondir);
90c62155 66 expand_base_dir(&repo->objects->objectdir, o->object_dir,
357a03eb 67 repo->commondir, "objects");
90c62155
SB
68 free(repo->objects->alternate_db);
69 repo->objects->alternate_db = xstrdup_or_null(o->alternate_db);
357a03eb
NTND
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");
359efeff
BW
74}
75
78a67668 76void repo_set_hash_algo(struct repository *repo, int hash_algo)
77{
78 repo->hash_algo = &hash_algos[hash_algo];
79}
80
359efeff
BW
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 */
85static 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;
357a03eb 91 struct set_gitdir_args args = { NULL };
359efeff
BW
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
357a03eb 106 repo_set_gitdir(repo, resolved_gitdir, &args);
359efeff
BW
107
108out:
109 free(abspath);
110 return ret;
111}
112
113void repo_set_worktree(struct repository *repo, const char *path)
114{
115 repo->worktree = real_pathdup(path, 1);
116}
117
118static 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 */
da62f786
SB
141int repo_init(struct repository *repo,
142 const char *gitdir,
143 const char *worktree)
359efeff
BW
144{
145 struct repository_format format;
146 memset(repo, 0, sizeof(*repo));
147
90c62155 148 repo->objects = raw_object_store_new();
99bf115c 149 repo->parsed_objects = parsed_object_pool_new();
90c62155 150
359efeff
BW
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
78a67668 157 repo_set_hash_algo(repo, format.hash_algo);
158
359efeff
BW
159 if (worktree)
160 repo_set_worktree(repo, worktree);
161
162 return 0;
163
164error:
165 repo_clear(repo);
166 return -1;
167}
168
96dc883b
BW
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 */
174int 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
0c89fdd7 183 sub = submodule_from_path(superproject, &null_oid, path);
96dc883b
BW
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
215out:
216 strbuf_release(&gitdir);
217 strbuf_release(&worktree);
218 return ret;
219}
220
359efeff
BW
221void repo_clear(struct repository *repo)
222{
90dd04aa
RS
223 FREE_AND_NULL(repo->gitdir);
224 FREE_AND_NULL(repo->commondir);
90dd04aa
RS
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);
3b256228 229
90c62155
SB
230 raw_object_store_clear(repo->objects);
231 FREE_AND_NULL(repo->objects);
232
99bf115c
SB
233 parsed_object_pool_clear(repo->parsed_objects);
234 FREE_AND_NULL(repo->parsed_objects);
235
3b256228
BW
236 if (repo->config) {
237 git_configset_clear(repo->config);
90dd04aa 238 FREE_AND_NULL(repo->config);
3b256228 239 }
639e30b5 240
bf12fcdf
BW
241 if (repo->submodule_cache) {
242 submodule_cache_free(repo->submodule_cache);
243 repo->submodule_cache = NULL;
244 }
245
639e30b5
BW
246 if (repo->index) {
247 discard_index(repo->index);
74373b5f
NTND
248 if (repo->index != &the_index)
249 FREE_AND_NULL(repo->index);
639e30b5
BW
250 }
251}
252
253int repo_read_index(struct repository *repo)
254{
255 if (!repo->index)
256 repo->index = xcalloc(1, sizeof(*repo->index));
639e30b5 257
a125a223 258 return read_index_from(repo->index, repo->index_file, repo->gitdir);
359efeff 259}