git repack: keep commits hidden by a graft
[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 enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
46 #ifndef OBJECT_CREATION_MODE
47 #define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
48 #endif
49 enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
50 int grafts_replace_parents = 1;
51
52 /* Parallel index stat data preload? */
53 int core_preload_index = 0;
54
55 /* This is set by setup_git_dir_gently() and/or git_default_config() */
56 char *git_work_tree_cfg;
57 static char *work_tree;
58
59 static const char *git_dir;
60 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
61
62 static void setup_git_env(void)
63 {
64 git_dir = getenv(GIT_DIR_ENVIRONMENT);
65 if (!git_dir)
66 git_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
67 if (!git_dir)
68 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
69 git_object_dir = getenv(DB_ENVIRONMENT);
70 if (!git_object_dir) {
71 git_object_dir = xmalloc(strlen(git_dir) + 9);
72 sprintf(git_object_dir, "%s/objects", git_dir);
73 }
74 git_refs_dir = xmalloc(strlen(git_dir) + 6);
75 sprintf(git_refs_dir, "%s/refs", git_dir);
76 git_index_file = getenv(INDEX_ENVIRONMENT);
77 if (!git_index_file) {
78 git_index_file = xmalloc(strlen(git_dir) + 7);
79 sprintf(git_index_file, "%s/index", git_dir);
80 }
81 git_graft_file = getenv(GRAFT_ENVIRONMENT);
82 if (!git_graft_file)
83 git_graft_file = git_pathdup("info/grafts");
84 }
85
86 int is_bare_repository(void)
87 {
88 /* if core.bare is not 'false', let's see if there is a work tree */
89 return is_bare_repository_cfg && !get_git_work_tree();
90 }
91
92 int have_git_dir(void)
93 {
94 return !!git_dir;
95 }
96
97 const char *get_git_dir(void)
98 {
99 if (!git_dir)
100 setup_git_env();
101 return git_dir;
102 }
103
104 static int git_work_tree_initialized;
105
106 /*
107 * Note. This works only before you used a work tree. This was added
108 * primarily to support git-clone to work in a new repository it just
109 * created, and is not meant to flip between different work trees.
110 */
111 void set_git_work_tree(const char *new_work_tree)
112 {
113 if (is_bare_repository_cfg >= 0)
114 die("cannot set work tree after initialization");
115 git_work_tree_initialized = 1;
116 free(work_tree);
117 work_tree = xstrdup(make_absolute_path(new_work_tree));
118 is_bare_repository_cfg = 0;
119 }
120
121 const char *get_git_work_tree(void)
122 {
123 if (!git_work_tree_initialized) {
124 work_tree = getenv(GIT_WORK_TREE_ENVIRONMENT);
125 /* core.bare = true overrides implicit and config work tree */
126 if (!work_tree && is_bare_repository_cfg < 1) {
127 work_tree = git_work_tree_cfg;
128 /* make_absolute_path also normalizes the path */
129 if (work_tree && !is_absolute_path(work_tree))
130 work_tree = xstrdup(make_absolute_path(git_path("%s", work_tree)));
131 } else if (work_tree)
132 work_tree = xstrdup(make_absolute_path(work_tree));
133 git_work_tree_initialized = 1;
134 if (work_tree)
135 is_bare_repository_cfg = 0;
136 }
137 return work_tree;
138 }
139
140 char *get_object_directory(void)
141 {
142 if (!git_object_dir)
143 setup_git_env();
144 return git_object_dir;
145 }
146
147 char *get_index_file(void)
148 {
149 if (!git_index_file)
150 setup_git_env();
151 return git_index_file;
152 }
153
154 char *get_graft_file(void)
155 {
156 if (!git_graft_file)
157 setup_git_env();
158 return git_graft_file;
159 }
160
161 int set_git_dir(const char *path)
162 {
163 if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
164 return error("Could not set GIT_DIR to '%s'", path);
165 setup_git_env();
166 return 0;
167 }