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