Clean up work-tree handling
[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 char *pager_program;
34 int pager_in_use;
35 int pager_use_color = 1;
36 int auto_crlf = 0; /* 1: both ways, -1: only when adding git objects */
37
38 /* This is set by setup_git_dir_gently() and/or git_default_config() */
39 char *git_work_tree_cfg;
40 static const char *work_tree;
41
42 static const char *git_dir;
43 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
44
45 static void setup_git_env(void)
46 {
47 git_dir = getenv(GIT_DIR_ENVIRONMENT);
48 if (!git_dir)
49 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
50 git_object_dir = getenv(DB_ENVIRONMENT);
51 if (!git_object_dir) {
52 git_object_dir = xmalloc(strlen(git_dir) + 9);
53 sprintf(git_object_dir, "%s/objects", git_dir);
54 }
55 git_refs_dir = xmalloc(strlen(git_dir) + 6);
56 sprintf(git_refs_dir, "%s/refs", git_dir);
57 git_index_file = getenv(INDEX_ENVIRONMENT);
58 if (!git_index_file) {
59 git_index_file = xmalloc(strlen(git_dir) + 7);
60 sprintf(git_index_file, "%s/index", git_dir);
61 }
62 git_graft_file = getenv(GRAFT_ENVIRONMENT);
63 if (!git_graft_file)
64 git_graft_file = xstrdup(git_path("info/grafts"));
65 }
66
67 int is_bare_repository(void)
68 {
69 /* if core.bare is not 'false', let's see if there is a work tree */
70 return is_bare_repository_cfg && !get_git_work_tree();
71 }
72
73 const char *get_git_dir(void)
74 {
75 if (!git_dir)
76 setup_git_env();
77 return git_dir;
78 }
79
80 const char *get_git_work_tree(void)
81 {
82 static int initialized = 0;
83 if (!initialized) {
84 work_tree = getenv(GIT_WORK_TREE_ENVIRONMENT);
85 /* core.bare = true overrides implicit and config work tree */
86 if (!work_tree && is_bare_repository_cfg < 1) {
87 work_tree = git_work_tree_cfg;
88 /* make_absolute_path also normalizes the path */
89 if (work_tree && !is_absolute_path(work_tree))
90 work_tree = xstrdup(make_absolute_path(git_path(work_tree)));
91 } else if (work_tree)
92 work_tree = xstrdup(make_absolute_path(work_tree));
93 initialized = 1;
94 if (work_tree)
95 is_bare_repository_cfg = 0;
96 }
97 return work_tree;
98 }
99
100 char *get_object_directory(void)
101 {
102 if (!git_object_dir)
103 setup_git_env();
104 return git_object_dir;
105 }
106
107 char *get_refs_directory(void)
108 {
109 if (!git_refs_dir)
110 setup_git_env();
111 return git_refs_dir;
112 }
113
114 char *get_index_file(void)
115 {
116 if (!git_index_file)
117 setup_git_env();
118 return git_index_file;
119 }
120
121 char *get_graft_file(void)
122 {
123 if (!git_graft_file)
124 setup_git_env();
125 return git_graft_file;
126 }
127
128 int set_git_dir(const char *path)
129 {
130 if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
131 return error("Could not set GIT_DIR to '%s'", path);
132 setup_git_env();
133 return 0;
134 }