Merge branch 'sg/t-helper-gitignore'
[git/git.git] / repository.c
CommitLineData
f8adbec9
NTND
1/*
2 * not really _using_ the compat macros, just make sure the_index
3 * declaration matches the definition in this file.
4 */
5#define USE_THE_INDEX_COMPATIBILITY_MACROS
359efeff
BW
6#include "cache.h"
7#include "repository.h"
90c62155 8#include "object-store.h"
3b256228 9#include "config.h"
99bf115c 10#include "object.h"
3a95f31d 11#include "lockfile.h"
bf12fcdf 12#include "submodule-config.h"
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13
14/* The main repository */
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NTND
15static struct repository the_repo;
16struct repository *the_repository;
f8adbec9 17struct index_state the_index;
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NTND
18
19void initialize_the_repository(void)
20{
21 the_repository = &the_repo;
22
23 the_repo.index = &the_index;
90c62155 24 the_repo.objects = raw_object_store_new();
99bf115c
SB
25 the_repo.parsed_objects = parsed_object_pool_new();
26
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NTND
27 repo_set_hash_algo(&the_repo, GIT_HASH_SHA1);
28}
359efeff 29
357a03eb
NTND
30static void expand_base_dir(char **out, const char *in,
31 const char *base_dir, const char *def_in)
32{
33 free(*out);
34 if (in)
35 *out = xstrdup(in);
36 else
37 *out = xstrfmt("%s/%s", base_dir, def_in);
38}
39
40static void repo_set_commondir(struct repository *repo,
41 const char *commondir)
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BW
42{
43 struct strbuf sb = STRBUF_INIT;
44
f9b7573f 45 free(repo->commondir);
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NTND
46
47 if (commondir) {
48 repo->different_commondir = 1;
49 repo->commondir = xstrdup(commondir);
50 return;
51 }
52
53 repo->different_commondir = get_common_dir_noenv(&sb, repo->gitdir);
359efeff 54 repo->commondir = strbuf_detach(&sb, NULL);
359efeff
BW
55}
56
357a03eb
NTND
57void repo_set_gitdir(struct repository *repo,
58 const char *root,
59 const struct set_gitdir_args *o)
359efeff 60{
357a03eb
NTND
61 const char *gitfile = read_gitfile(root);
62 /*
63 * repo->gitdir is saved because the caller could pass "root"
64 * that also points to repo->gitdir. We want to keep it alive
65 * until after xstrdup(root). Then we can free it.
66 */
1fb2b636 67 char *old_gitdir = repo->gitdir;
359efeff 68
357a03eb 69 repo->gitdir = xstrdup(gitfile ? gitfile : root);
1fb2b636 70 free(old_gitdir);
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NTND
71
72 repo_set_commondir(repo, o->commondir);
f0eaf638
JK
73
74 if (!repo->objects->odb) {
75 repo->objects->odb = xcalloc(1, sizeof(*repo->objects->odb));
76 repo->objects->odb_tail = &repo->objects->odb->next;
77 }
78 expand_base_dir(&repo->objects->odb->path, o->object_dir,
357a03eb 79 repo->commondir, "objects");
f0eaf638 80
90c62155
SB
81 free(repo->objects->alternate_db);
82 repo->objects->alternate_db = xstrdup_or_null(o->alternate_db);
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NTND
83 expand_base_dir(&repo->graft_file, o->graft_file,
84 repo->commondir, "info/grafts");
85 expand_base_dir(&repo->index_file, o->index_file,
86 repo->gitdir, "index");
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BW
87}
88
78a67668 89void repo_set_hash_algo(struct repository *repo, int hash_algo)
90{
91 repo->hash_algo = &hash_algos[hash_algo];
92}
93
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BW
94/*
95 * Attempt to resolve and set the provided 'gitdir' for repository 'repo'.
96 * Return 0 upon success and a non-zero value upon failure.
97 */
98static int repo_init_gitdir(struct repository *repo, const char *gitdir)
99{
100 int ret = 0;
101 int error = 0;
102 char *abspath = NULL;
103 const char *resolved_gitdir;
357a03eb 104 struct set_gitdir_args args = { NULL };
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BW
105
106 abspath = real_pathdup(gitdir, 0);
107 if (!abspath) {
108 ret = -1;
109 goto out;
110 }
111
112 /* 'gitdir' must reference the gitdir directly */
113 resolved_gitdir = resolve_gitdir_gently(abspath, &error);
114 if (!resolved_gitdir) {
115 ret = -1;
116 goto out;
117 }
118
357a03eb 119 repo_set_gitdir(repo, resolved_gitdir, &args);
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120
121out:
122 free(abspath);
123 return ret;
124}
125
126void repo_set_worktree(struct repository *repo, const char *path)
127{
128 repo->worktree = real_pathdup(path, 1);
ee4512ed
JH
129
130 trace2_def_repo(repo);
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BW
131}
132
133static int read_and_verify_repository_format(struct repository_format *format,
134 const char *commondir)
135{
136 int ret = 0;
137 struct strbuf sb = STRBUF_INIT;
138
139 strbuf_addf(&sb, "%s/config", commondir);
140 read_repository_format(format, sb.buf);
141 strbuf_reset(&sb);
142
143 if (verify_repository_format(format, &sb) < 0) {
144 warning("%s", sb.buf);
145 ret = -1;
146 }
147
148 strbuf_release(&sb);
149 return ret;
150}
151
152/*
153 * Initialize 'repo' based on the provided 'gitdir'.
154 * Return 0 upon success and a non-zero value upon failure.
155 */
da62f786
SB
156int repo_init(struct repository *repo,
157 const char *gitdir,
158 const char *worktree)
359efeff 159{
e8805af1 160 struct repository_format format = REPOSITORY_FORMAT_INIT;
359efeff
BW
161 memset(repo, 0, sizeof(*repo));
162
90c62155 163 repo->objects = raw_object_store_new();
99bf115c 164 repo->parsed_objects = parsed_object_pool_new();
90c62155 165
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BW
166 if (repo_init_gitdir(repo, gitdir))
167 goto error;
168
169 if (read_and_verify_repository_format(&format, repo->commondir))
170 goto error;
171
78a67668 172 repo_set_hash_algo(repo, format.hash_algo);
173
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BW
174 if (worktree)
175 repo_set_worktree(repo, worktree);
176
e8805af1 177 clear_repository_format(&format);
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178 return 0;
179
180error:
181 repo_clear(repo);
182 return -1;
183}
184
d5498e08 185int repo_submodule_init(struct repository *subrepo,
96dc883b 186 struct repository *superproject,
d5498e08 187 const struct submodule *sub)
96dc883b 188{
96dc883b
BW
189 struct strbuf gitdir = STRBUF_INIT;
190 struct strbuf worktree = STRBUF_INIT;
191 int ret = 0;
192
96dc883b
BW
193 if (!sub) {
194 ret = -1;
195 goto out;
196 }
197
d5498e08
SB
198 strbuf_repo_worktree_path(&gitdir, superproject, "%s/.git", sub->path);
199 strbuf_repo_worktree_path(&worktree, superproject, "%s", sub->path);
96dc883b 200
d5498e08 201 if (repo_init(subrepo, gitdir.buf, worktree.buf)) {
96dc883b
BW
202 /*
203 * If initilization fails then it may be due to the submodule
204 * not being populated in the superproject's worktree. Instead
205 * we can try to initilize the submodule by finding it's gitdir
206 * in the superproject's 'modules' directory. In this case the
207 * submodule would not have a worktree.
208 */
209 strbuf_reset(&gitdir);
210 strbuf_repo_git_path(&gitdir, superproject,
211 "modules/%s", sub->name);
212
d5498e08 213 if (repo_init(subrepo, gitdir.buf, NULL)) {
96dc883b
BW
214 ret = -1;
215 goto out;
216 }
217 }
218
d5498e08
SB
219 subrepo->submodule_prefix = xstrfmt("%s%s/",
220 superproject->submodule_prefix ?
221 superproject->submodule_prefix :
222 "", sub->path);
96dc883b
BW
223
224out:
225 strbuf_release(&gitdir);
226 strbuf_release(&worktree);
227 return ret;
228}
229
359efeff
BW
230void repo_clear(struct repository *repo)
231{
90dd04aa
RS
232 FREE_AND_NULL(repo->gitdir);
233 FREE_AND_NULL(repo->commondir);
90dd04aa
RS
234 FREE_AND_NULL(repo->graft_file);
235 FREE_AND_NULL(repo->index_file);
236 FREE_AND_NULL(repo->worktree);
237 FREE_AND_NULL(repo->submodule_prefix);
3b256228 238
90c62155
SB
239 raw_object_store_clear(repo->objects);
240 FREE_AND_NULL(repo->objects);
241
99bf115c
SB
242 parsed_object_pool_clear(repo->parsed_objects);
243 FREE_AND_NULL(repo->parsed_objects);
244
3b256228
BW
245 if (repo->config) {
246 git_configset_clear(repo->config);
90dd04aa 247 FREE_AND_NULL(repo->config);
3b256228 248 }
639e30b5 249
bf12fcdf
BW
250 if (repo->submodule_cache) {
251 submodule_cache_free(repo->submodule_cache);
252 repo->submodule_cache = NULL;
253 }
254
639e30b5
BW
255 if (repo->index) {
256 discard_index(repo->index);
74373b5f
NTND
257 if (repo->index != &the_index)
258 FREE_AND_NULL(repo->index);
639e30b5
BW
259 }
260}
261
262int repo_read_index(struct repository *repo)
263{
264 if (!repo->index)
265 repo->index = xcalloc(1, sizeof(*repo->index));
639e30b5 266
a125a223 267 return read_index_from(repo->index, repo->index_file, repo->gitdir);
359efeff 268}
3a95f31d
NTND
269
270int repo_hold_locked_index(struct repository *repo,
271 struct lock_file *lf,
272 int flags)
273{
274 if (!repo->index_file)
275 BUG("the repo hasn't been setup");
276 return hold_lock_file_for_update(lf, repo->index_file, flags);
277}