Add a function to set a non-default work tree
[git/git.git] / environment.c
1 /*
2 * We put all the git config variables in this same object
3 * file, so that programs can link against the config parser
4 * without having to link against all the rest of git.
5 *
6 * In particular, no need to bring in libz etc unless needed,
7 * even if you might want to know where the git directory etc
8 * are.
9 */
10 #include "cache.h"
11
12 char git_default_email[MAX_GITNAME];
13 char git_default_name[MAX_GITNAME];
14 int trust_executable_bit = 1;
15 int quote_path_fully = 1;
16 int has_symlinks = 1;
17 int assume_unchanged;
18 int prefer_symlink_refs;
19 int is_bare_repository_cfg = -1; /* unspecified */
20 int log_all_ref_updates = -1; /* unspecified */
21 int warn_ambiguous_refs = 1;
22 int repository_format_version;
23 const char *git_commit_encoding;
24 const char *git_log_output_encoding;
25 int shared_repository = PERM_UMASK;
26 const char *apply_default_whitespace;
27 int zlib_compression_level = Z_BEST_SPEED;
28 int core_compression_level;
29 int core_compression_seen;
30 size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
31 size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
32 size_t delta_base_cache_limit = 16 * 1024 * 1024;
33 const char *pager_program;
34 int pager_use_color = 1;
35 const char *editor_program;
36 const char *excludes_file;
37 int auto_crlf = 0; /* 1: both ways, -1: only when adding git objects */
38 enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
39 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
40 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
41
42 /* This is set by setup_git_dir_gently() and/or git_default_config() */
43 char *git_work_tree_cfg;
44 static char *work_tree;
45
46 static const char *git_dir;
47 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
48
49 static void setup_git_env(void)
50 {
51 git_dir = getenv(GIT_DIR_ENVIRONMENT);
52 if (!git_dir)
53 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
54 git_object_dir = getenv(DB_ENVIRONMENT);
55 if (!git_object_dir) {
56 git_object_dir = xmalloc(strlen(git_dir) + 9);
57 sprintf(git_object_dir, "%s/objects", git_dir);
58 }
59 git_refs_dir = xmalloc(strlen(git_dir) + 6);
60 sprintf(git_refs_dir, "%s/refs", git_dir);
61 git_index_file = getenv(INDEX_ENVIRONMENT);
62 if (!git_index_file) {
63 git_index_file = xmalloc(strlen(git_dir) + 7);
64 sprintf(git_index_file, "%s/index", git_dir);
65 }
66 git_graft_file = getenv(GRAFT_ENVIRONMENT);
67 if (!git_graft_file)
68 git_graft_file = xstrdup(git_path("info/grafts"));
69 }
70
71 int is_bare_repository(void)
72 {
73 /* if core.bare is not 'false', let's see if there is a work tree */
74 return is_bare_repository_cfg && !get_git_work_tree();
75 }
76
77 const char *get_git_dir(void)
78 {
79 if (!git_dir)
80 setup_git_env();
81 return git_dir;
82 }
83
84 static int git_work_tree_initialized;
85
86 /*
87 * Note. This works only before you used a work tree. This was added
88 * primarily to support git-clone to work in a new repository it just
89 * created, and is not meant to flip between different work trees.
90 */
91 void set_git_work_tree(const char *new_work_tree)
92 {
93 if (is_bare_repository_cfg >= 0)
94 die("cannot set work tree after initialization");
95 git_work_tree_initialized = 1;
96 free(work_tree);
97 work_tree = xstrdup(make_absolute_path(new_work_tree));
98 is_bare_repository_cfg = 0;
99 }
100
101 const char *get_git_work_tree(void)
102 {
103 if (!git_work_tree_initialized) {
104 work_tree = getenv(GIT_WORK_TREE_ENVIRONMENT);
105 /* core.bare = true overrides implicit and config work tree */
106 if (!work_tree && is_bare_repository_cfg < 1) {
107 work_tree = git_work_tree_cfg;
108 /* make_absolute_path also normalizes the path */
109 if (work_tree && !is_absolute_path(work_tree))
110 work_tree = xstrdup(make_absolute_path(git_path(work_tree)));
111 } else if (work_tree)
112 work_tree = xstrdup(make_absolute_path(work_tree));
113 git_work_tree_initialized = 1;
114 if (work_tree)
115 is_bare_repository_cfg = 0;
116 }
117 return work_tree;
118 }
119
120 char *get_object_directory(void)
121 {
122 if (!git_object_dir)
123 setup_git_env();
124 return git_object_dir;
125 }
126
127 char *get_refs_directory(void)
128 {
129 if (!git_refs_dir)
130 setup_git_env();
131 return git_refs_dir;
132 }
133
134 char *get_index_file(void)
135 {
136 if (!git_index_file)
137 setup_git_env();
138 return git_index_file;
139 }
140
141 char *get_graft_file(void)
142 {
143 if (!git_graft_file)
144 setup_git_env();
145 return git_graft_file;
146 }
147
148 int set_git_dir(const char *path)
149 {
150 if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
151 return error("Could not set GIT_DIR to '%s'", path);
152 setup_git_env();
153 return 0;
154 }