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359efeff BW |
1 | #include "cache.h" |
2 | #include "repository.h" | |
3 | ||
4 | /* The main repository */ | |
5 | static struct repository the_repo; | |
6 | struct repository *the_repository = &the_repo; | |
7 | ||
8 | static char *git_path_from_env(const char *envvar, const char *git_dir, | |
9 | const char *path, int fromenv) | |
10 | { | |
11 | if (fromenv) { | |
12 | const char *value = getenv(envvar); | |
13 | if (value) | |
14 | return xstrdup(value); | |
15 | } | |
16 | ||
17 | return xstrfmt("%s/%s", git_dir, path); | |
18 | } | |
19 | ||
20 | static int find_common_dir(struct strbuf *sb, const char *gitdir, int fromenv) | |
21 | { | |
22 | if (fromenv) { | |
23 | const char *value = getenv(GIT_COMMON_DIR_ENVIRONMENT); | |
24 | if (value) { | |
25 | strbuf_addstr(sb, value); | |
26 | return 1; | |
27 | } | |
28 | } | |
29 | ||
30 | return get_common_dir_noenv(sb, gitdir); | |
31 | } | |
32 | ||
33 | static void repo_setup_env(struct repository *repo) | |
34 | { | |
35 | struct strbuf sb = STRBUF_INIT; | |
36 | ||
37 | repo->different_commondir = find_common_dir(&sb, repo->gitdir, | |
38 | !repo->ignore_env); | |
39 | repo->commondir = strbuf_detach(&sb, NULL); | |
40 | repo->objectdir = git_path_from_env(DB_ENVIRONMENT, repo->commondir, | |
41 | "objects", !repo->ignore_env); | |
42 | repo->graft_file = git_path_from_env(GRAFT_ENVIRONMENT, repo->commondir, | |
43 | "info/grafts", !repo->ignore_env); | |
44 | repo->index_file = git_path_from_env(INDEX_ENVIRONMENT, repo->gitdir, | |
45 | "index", !repo->ignore_env); | |
46 | } | |
47 | ||
48 | void repo_set_gitdir(struct repository *repo, const char *path) | |
49 | { | |
50 | const char *gitfile = read_gitfile(path); | |
51 | ||
52 | /* | |
53 | * NEEDSWORK: Eventually we want to be able to free gitdir and the rest | |
54 | * of the environment before reinitializing it again, but we have some | |
55 | * crazy code paths where we try to set gitdir with the current gitdir | |
56 | * and we don't want to free gitdir before copying the passed in value. | |
57 | */ | |
58 | repo->gitdir = xstrdup(gitfile ? gitfile : path); | |
59 | ||
60 | repo_setup_env(repo); | |
61 | } | |
62 | ||
63 | /* | |
64 | * Attempt to resolve and set the provided 'gitdir' for repository 'repo'. | |
65 | * Return 0 upon success and a non-zero value upon failure. | |
66 | */ | |
67 | static int repo_init_gitdir(struct repository *repo, const char *gitdir) | |
68 | { | |
69 | int ret = 0; | |
70 | int error = 0; | |
71 | char *abspath = NULL; | |
72 | const char *resolved_gitdir; | |
73 | ||
74 | abspath = real_pathdup(gitdir, 0); | |
75 | if (!abspath) { | |
76 | ret = -1; | |
77 | goto out; | |
78 | } | |
79 | ||
80 | /* 'gitdir' must reference the gitdir directly */ | |
81 | resolved_gitdir = resolve_gitdir_gently(abspath, &error); | |
82 | if (!resolved_gitdir) { | |
83 | ret = -1; | |
84 | goto out; | |
85 | } | |
86 | ||
87 | repo_set_gitdir(repo, resolved_gitdir); | |
88 | ||
89 | out: | |
90 | free(abspath); | |
91 | return ret; | |
92 | } | |
93 | ||
94 | void repo_set_worktree(struct repository *repo, const char *path) | |
95 | { | |
96 | repo->worktree = real_pathdup(path, 1); | |
97 | } | |
98 | ||
99 | static int read_and_verify_repository_format(struct repository_format *format, | |
100 | const char *commondir) | |
101 | { | |
102 | int ret = 0; | |
103 | struct strbuf sb = STRBUF_INIT; | |
104 | ||
105 | strbuf_addf(&sb, "%s/config", commondir); | |
106 | read_repository_format(format, sb.buf); | |
107 | strbuf_reset(&sb); | |
108 | ||
109 | if (verify_repository_format(format, &sb) < 0) { | |
110 | warning("%s", sb.buf); | |
111 | ret = -1; | |
112 | } | |
113 | ||
114 | strbuf_release(&sb); | |
115 | return ret; | |
116 | } | |
117 | ||
118 | /* | |
119 | * Initialize 'repo' based on the provided 'gitdir'. | |
120 | * Return 0 upon success and a non-zero value upon failure. | |
121 | */ | |
122 | int repo_init(struct repository *repo, const char *gitdir, const char *worktree) | |
123 | { | |
124 | struct repository_format format; | |
125 | memset(repo, 0, sizeof(*repo)); | |
126 | ||
127 | repo->ignore_env = 1; | |
128 | ||
129 | if (repo_init_gitdir(repo, gitdir)) | |
130 | goto error; | |
131 | ||
132 | if (read_and_verify_repository_format(&format, repo->commondir)) | |
133 | goto error; | |
134 | ||
135 | if (worktree) | |
136 | repo_set_worktree(repo, worktree); | |
137 | ||
138 | return 0; | |
139 | ||
140 | error: | |
141 | repo_clear(repo); | |
142 | return -1; | |
143 | } | |
144 | ||
145 | void repo_clear(struct repository *repo) | |
146 | { | |
147 | free(repo->gitdir); | |
148 | repo->gitdir = NULL; | |
149 | free(repo->commondir); | |
150 | repo->commondir = NULL; | |
151 | free(repo->objectdir); | |
152 | repo->objectdir = NULL; | |
153 | free(repo->graft_file); | |
154 | repo->graft_file = NULL; | |
155 | free(repo->index_file); | |
156 | repo->index_file = NULL; | |
157 | free(repo->worktree); | |
158 | repo->worktree = NULL; | |
159 | } |