Add cache preload facility
[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 user_ident_explicitly_given;
15 int trust_executable_bit = 1;
16 int trust_ctime = 1;
17 int has_symlinks = 1;
18 int ignore_case;
19 int assume_unchanged;
20 int prefer_symlink_refs;
21 int is_bare_repository_cfg = -1; /* unspecified */
22 int log_all_ref_updates = -1; /* unspecified */
23 int warn_ambiguous_refs = 1;
24 int repository_format_version;
25 const char *git_commit_encoding;
26 const char *git_log_output_encoding;
27 int shared_repository = PERM_UMASK;
28 const char *apply_default_whitespace;
29 int zlib_compression_level = Z_BEST_SPEED;
30 int core_compression_level;
31 int core_compression_seen;
32 int fsync_object_files;
33 size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
34 size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
35 size_t delta_base_cache_limit = 16 * 1024 * 1024;
36 const char *pager_program;
37 int pager_use_color = 1;
38 const char *editor_program;
39 const char *excludes_file;
40 int auto_crlf = 0; /* 1: both ways, -1: only when adding git objects */
41 enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
42 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
43 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
44 enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
45
46 /* Parallel index stat data preload? */
47 int core_preload_index = 0;
48
49 /* This is set by setup_git_dir_gently() and/or git_default_config() */
50 char *git_work_tree_cfg;
51 static char *work_tree;
52
53 static const char *git_dir;
54 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
55
56 static void setup_git_env(void)
57 {
58 git_dir = getenv(GIT_DIR_ENVIRONMENT);
59 if (!git_dir)
60 git_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
61 if (!git_dir)
62 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
63 git_object_dir = getenv(DB_ENVIRONMENT);
64 if (!git_object_dir) {
65 git_object_dir = xmalloc(strlen(git_dir) + 9);
66 sprintf(git_object_dir, "%s/objects", git_dir);
67 }
68 git_refs_dir = xmalloc(strlen(git_dir) + 6);
69 sprintf(git_refs_dir, "%s/refs", git_dir);
70 git_index_file = getenv(INDEX_ENVIRONMENT);
71 if (!git_index_file) {
72 git_index_file = xmalloc(strlen(git_dir) + 7);
73 sprintf(git_index_file, "%s/index", git_dir);
74 }
75 git_graft_file = getenv(GRAFT_ENVIRONMENT);
76 if (!git_graft_file)
77 git_graft_file = git_pathdup("info/grafts");
78 }
79
80 int is_bare_repository(void)
81 {
82 /* if core.bare is not 'false', let's see if there is a work tree */
83 return is_bare_repository_cfg && !get_git_work_tree();
84 }
85
86 int have_git_dir(void)
87 {
88 return !!git_dir;
89 }
90
91 const char *get_git_dir(void)
92 {
93 if (!git_dir)
94 setup_git_env();
95 return git_dir;
96 }
97
98 static int git_work_tree_initialized;
99
100 /*
101 * Note. This works only before you used a work tree. This was added
102 * primarily to support git-clone to work in a new repository it just
103 * created, and is not meant to flip between different work trees.
104 */
105 void set_git_work_tree(const char *new_work_tree)
106 {
107 if (is_bare_repository_cfg >= 0)
108 die("cannot set work tree after initialization");
109 git_work_tree_initialized = 1;
110 free(work_tree);
111 work_tree = xstrdup(make_absolute_path(new_work_tree));
112 is_bare_repository_cfg = 0;
113 }
114
115 const char *get_git_work_tree(void)
116 {
117 if (!git_work_tree_initialized) {
118 work_tree = getenv(GIT_WORK_TREE_ENVIRONMENT);
119 /* core.bare = true overrides implicit and config work tree */
120 if (!work_tree && is_bare_repository_cfg < 1) {
121 work_tree = git_work_tree_cfg;
122 /* make_absolute_path also normalizes the path */
123 if (work_tree && !is_absolute_path(work_tree))
124 work_tree = xstrdup(make_absolute_path(git_path("%s", work_tree)));
125 } else if (work_tree)
126 work_tree = xstrdup(make_absolute_path(work_tree));
127 git_work_tree_initialized = 1;
128 if (work_tree)
129 is_bare_repository_cfg = 0;
130 }
131 return work_tree;
132 }
133
134 char *get_object_directory(void)
135 {
136 if (!git_object_dir)
137 setup_git_env();
138 return git_object_dir;
139 }
140
141 char *get_index_file(void)
142 {
143 if (!git_index_file)
144 setup_git_env();
145 return git_index_file;
146 }
147
148 char *get_graft_file(void)
149 {
150 if (!git_graft_file)
151 setup_git_env();
152 return git_graft_file;
153 }
154
155 int set_git_dir(const char *path)
156 {
157 if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
158 return error("Could not set GIT_DIR to '%s'", path);
159 setup_git_env();
160 return 0;
161 }