1#include "cache.h"
2#include "repository.h"
3#include "config.h"
4#include "submodule-config.h"
5
6/* The main repository */
7static struct repository the_repo;
8struct repository *the_repository;
9
10void 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}
17
18static 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
28static void repo_set_commondir(struct repository *repo,
29 const char *commondir)
30{
31 struct strbuf sb = STRBUF_INIT;
32
33 free(repo->commondir);
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);
42 repo->commondir = strbuf_detach(&sb, NULL);
43}
44
45void repo_set_gitdir(struct repository *repo,
46 const char *root,
47 const struct set_gitdir_args *o)
48{
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 */
55 char *old_gitdir = repo->gitdir;
56
57 repo->gitdir = xstrdup(gitfile ? gitfile : root);
58 free(old_gitdir);
59
60 repo_set_commondir(repo, o->commondir);
61 expand_base_dir(&repo->objectdir, o->object_dir,
62 repo->commondir, "objects");
63 expand_base_dir(&repo->graft_file, o->graft_file,
64 repo->commondir, "info/grafts");
65 expand_base_dir(&repo->index_file, o->index_file,
66 repo->gitdir, "index");
67}
68
69void repo_set_hash_algo(struct repository *repo, int hash_algo)
70{
71 repo->hash_algo = &hash_algos[hash_algo];
72}
73
74/*
75 * Attempt to resolve and set the provided 'gitdir' for repository 'repo'.
76 * Return 0 upon success and a non-zero value upon failure.
77 */
78static int repo_init_gitdir(struct repository *repo, const char *gitdir)
79{
80 int ret = 0;
81 int error = 0;
82 char *abspath = NULL;
83 const char *resolved_gitdir;
84 struct set_gitdir_args args = { NULL };
85
86 abspath = real_pathdup(gitdir, 0);
87 if (!abspath) {
88 ret = -1;
89 goto out;
90 }
91
92 /* 'gitdir' must reference the gitdir directly */
93 resolved_gitdir = resolve_gitdir_gently(abspath, &error);
94 if (!resolved_gitdir) {
95 ret = -1;
96 goto out;
97 }
98
99 repo_set_gitdir(repo, resolved_gitdir, &args);
100
101out:
102 free(abspath);
103 return ret;
104}
105
106void repo_set_worktree(struct repository *repo, const char *path)
107{
108 repo->worktree = real_pathdup(path, 1);
109}
110
111static int read_and_verify_repository_format(struct repository_format *format,
112 const char *commondir)
113{
114 int ret = 0;
115 struct strbuf sb = STRBUF_INIT;
116
117 strbuf_addf(&sb, "%s/config", commondir);
118 read_repository_format(format, sb.buf);
119 strbuf_reset(&sb);
120
121 if (verify_repository_format(format, &sb) < 0) {
122 warning("%s", sb.buf);
123 ret = -1;
124 }
125
126 strbuf_release(&sb);
127 return ret;
128}
129
130/*
131 * Initialize 'repo' based on the provided 'gitdir'.
132 * Return 0 upon success and a non-zero value upon failure.
133 */
134static int repo_init(struct repository *repo,
135 const char *gitdir,
136 const char *worktree)
137{
138 struct repository_format format;
139 memset(repo, 0, sizeof(*repo));
140
141 repo->ignore_env = 1;
142
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
149 repo_set_hash_algo(repo, format.hash_algo);
150
151 if (worktree)
152 repo_set_worktree(repo, worktree);
153
154 return 0;
155
156error:
157 repo_clear(repo);
158 return -1;
159}
160
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 */
166int 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
175 sub = submodule_from_cache(superproject, &null_oid, path);
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
207out:
208 strbuf_release(&gitdir);
209 strbuf_release(&worktree);
210 return ret;
211}
212
213void repo_clear(struct repository *repo)
214{
215 FREE_AND_NULL(repo->gitdir);
216 FREE_AND_NULL(repo->commondir);
217 FREE_AND_NULL(repo->objectdir);
218 FREE_AND_NULL(repo->graft_file);
219 FREE_AND_NULL(repo->index_file);
220 FREE_AND_NULL(repo->worktree);
221 FREE_AND_NULL(repo->submodule_prefix);
222
223 if (repo->config) {
224 git_configset_clear(repo->config);
225 FREE_AND_NULL(repo->config);
226 }
227
228 if (repo->submodule_cache) {
229 submodule_cache_free(repo->submodule_cache);
230 repo->submodule_cache = NULL;
231 }
232
233 if (repo->index) {
234 discard_index(repo->index);
235 FREE_AND_NULL(repo->index);
236 }
237}
238
239int repo_read_index(struct repository *repo)
240{
241 if (!repo->index)
242 repo->index = xcalloc(1, sizeof(*repo->index));
243
244 return read_index_from(repo->index, repo->index_file, repo->gitdir);
245}