init: kill git_link variable
[git.git] / environment.c
blobabf3cb66e57ce5ea1d8c6b0378d9978de5d956c5
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.
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 #include "refs.h"
12 #include "fmt-merge-msg.h"
13 #include "commit.h"
15 int trust_executable_bit = 1;
16 int trust_ctime = 1;
17 int check_stat = 1;
18 int has_symlinks = 1;
19 int minimum_abbrev = 4, default_abbrev = 7;
20 int ignore_case;
21 int assume_unchanged;
22 int prefer_symlink_refs;
23 int is_bare_repository_cfg = -1; /* unspecified */
24 int log_all_ref_updates = -1; /* unspecified */
25 int warn_ambiguous_refs = 1;
26 int warn_on_object_refname_ambiguity = 1;
27 int ref_paranoia = -1;
28 int repository_format_precious_objects;
29 const char *git_commit_encoding;
30 const char *git_log_output_encoding;
31 const char *apply_default_whitespace;
32 const char *apply_default_ignorewhitespace;
33 const char *git_attributes_file;
34 int zlib_compression_level = Z_BEST_SPEED;
35 int core_compression_level;
36 int core_compression_seen;
37 int fsync_object_files;
38 size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
39 size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
40 size_t delta_base_cache_limit = 96 * 1024 * 1024;
41 unsigned long big_file_threshold = 512 * 1024 * 1024;
42 int pager_use_color = 1;
43 const char *editor_program;
44 const char *askpass_program;
45 const char *excludes_file;
46 enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
47 int check_replace_refs = 1;
48 char *git_replace_ref_base;
49 enum eol core_eol = EOL_UNSET;
50 enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
51 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
52 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
53 enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
54 enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
55 #ifndef OBJECT_CREATION_MODE
56 #define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
57 #endif
58 enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
59 char *notes_ref_name;
60 int grafts_replace_parents = 1;
61 int core_apply_sparse_checkout;
62 int merge_log_config = -1;
63 int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
64 unsigned long pack_size_limit_cfg;
65 enum hide_dotfiles_type hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
67 #ifndef PROTECT_HFS_DEFAULT
68 #define PROTECT_HFS_DEFAULT 0
69 #endif
70 int protect_hfs = PROTECT_HFS_DEFAULT;
72 #ifndef PROTECT_NTFS_DEFAULT
73 #define PROTECT_NTFS_DEFAULT 0
74 #endif
75 int protect_ntfs = PROTECT_NTFS_DEFAULT;
78 * The character that begins a commented line in user-editable file
79 * that is subject to stripspace.
81 char comment_line_char = '#';
82 int auto_comment_line_char;
84 /* Parallel index stat data preload? */
85 int core_preload_index = 1;
88 * This is a hack for test programs like test-dump-untracked-cache to
89 * ensure that they do not modify the untracked cache when reading it.
90 * Do not use it otherwise!
92 int ignore_untracked_cache_config;
94 /* This is set by setup_git_dir_gently() and/or git_default_config() */
95 char *git_work_tree_cfg;
96 static char *work_tree;
98 static const char *namespace;
99 static size_t namespace_len;
101 static const char *git_dir, *git_common_dir;
102 static char *git_object_dir, *git_index_file, *git_graft_file;
103 int git_db_env, git_index_env, git_graft_env, git_common_dir_env;
106 * Repository-local GIT_* environment variables; see cache.h for details.
108 const char * const local_repo_env[] = {
109 ALTERNATE_DB_ENVIRONMENT,
110 CONFIG_ENVIRONMENT,
111 CONFIG_DATA_ENVIRONMENT,
112 DB_ENVIRONMENT,
113 GIT_DIR_ENVIRONMENT,
114 GIT_WORK_TREE_ENVIRONMENT,
115 GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
116 GRAFT_ENVIRONMENT,
117 INDEX_ENVIRONMENT,
118 NO_REPLACE_OBJECTS_ENVIRONMENT,
119 GIT_REPLACE_REF_BASE_ENVIRONMENT,
120 GIT_PREFIX_ENVIRONMENT,
121 GIT_SHALLOW_FILE_ENVIRONMENT,
122 GIT_COMMON_DIR_ENVIRONMENT,
123 NULL
126 static char *expand_namespace(const char *raw_namespace)
128 struct strbuf buf = STRBUF_INIT;
129 struct strbuf **components, **c;
131 if (!raw_namespace || !*raw_namespace)
132 return xstrdup("");
134 strbuf_addstr(&buf, raw_namespace);
135 components = strbuf_split(&buf, '/');
136 strbuf_reset(&buf);
137 for (c = components; *c; c++)
138 if (strcmp((*c)->buf, "/") != 0)
139 strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
140 strbuf_list_free(components);
141 if (check_refname_format(buf.buf, 0))
142 die("bad git namespace path \"%s\"", raw_namespace);
143 strbuf_addch(&buf, '/');
144 return strbuf_detach(&buf, NULL);
147 static char *git_path_from_env(const char *envvar, const char *git_dir,
148 const char *path, int *fromenv)
150 const char *value = getenv(envvar);
151 if (!value)
152 return xstrfmt("%s/%s", git_dir, path);
153 if (fromenv)
154 *fromenv = 1;
155 return xstrdup(value);
158 static void setup_git_env(void)
160 struct strbuf sb = STRBUF_INIT;
161 const char *gitfile;
162 const char *shallow_file;
163 const char *replace_ref_base;
165 git_dir = getenv(GIT_DIR_ENVIRONMENT);
166 if (!git_dir)
167 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
168 gitfile = read_gitfile(git_dir);
169 git_dir = xstrdup(gitfile ? gitfile : git_dir);
170 if (get_common_dir(&sb, git_dir))
171 git_common_dir_env = 1;
172 git_common_dir = strbuf_detach(&sb, NULL);
173 git_object_dir = git_path_from_env(DB_ENVIRONMENT, git_common_dir,
174 "objects", &git_db_env);
175 git_index_file = git_path_from_env(INDEX_ENVIRONMENT, git_dir,
176 "index", &git_index_env);
177 git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, git_common_dir,
178 "info/grafts", &git_graft_env);
179 if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
180 check_replace_refs = 0;
181 replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
182 git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
183 : "refs/replace/");
184 namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
185 namespace_len = strlen(namespace);
186 shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
187 if (shallow_file)
188 set_alternate_shallow_file(shallow_file, 0);
191 int is_bare_repository(void)
193 /* if core.bare is not 'false', let's see if there is a work tree */
194 return is_bare_repository_cfg && !get_git_work_tree();
197 int have_git_dir(void)
199 return startup_info->have_repository
200 || git_dir
201 || getenv(GIT_DIR_ENVIRONMENT);
204 const char *get_git_dir(void)
206 if (!git_dir)
207 setup_git_env();
208 return git_dir;
211 const char *get_git_common_dir(void)
213 return git_common_dir;
216 const char *get_git_namespace(void)
218 if (!namespace)
219 setup_git_env();
220 return namespace;
223 const char *strip_namespace(const char *namespaced_ref)
225 if (!starts_with(namespaced_ref, get_git_namespace()))
226 return NULL;
227 return namespaced_ref + namespace_len;
230 static int git_work_tree_initialized;
233 * Note. This works only before you used a work tree. This was added
234 * primarily to support git-clone to work in a new repository it just
235 * created, and is not meant to flip between different work trees.
237 void set_git_work_tree(const char *new_work_tree)
239 if (git_work_tree_initialized) {
240 new_work_tree = real_path(new_work_tree);
241 if (strcmp(new_work_tree, work_tree))
242 die("internal error: work tree has already been set\n"
243 "Current worktree: %s\nNew worktree: %s",
244 work_tree, new_work_tree);
245 return;
247 git_work_tree_initialized = 1;
248 work_tree = xstrdup(real_path(new_work_tree));
251 const char *get_git_work_tree(void)
253 return work_tree;
256 char *get_object_directory(void)
258 if (!git_object_dir)
259 setup_git_env();
260 return git_object_dir;
263 int odb_mkstemp(char *template, size_t limit, const char *pattern)
265 int fd;
267 * we let the umask do its job, don't try to be more
268 * restrictive except to remove write permission.
270 int mode = 0444;
271 snprintf(template, limit, "%s/%s",
272 get_object_directory(), pattern);
273 fd = git_mkstemp_mode(template, mode);
274 if (0 <= fd)
275 return fd;
277 /* slow path */
278 /* some mkstemp implementations erase template on failure */
279 snprintf(template, limit, "%s/%s",
280 get_object_directory(), pattern);
281 safe_create_leading_directories(template);
282 return xmkstemp_mode(template, mode);
285 int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1)
287 int fd;
289 snprintf(name, namesz, "%s/pack/pack-%s.keep",
290 get_object_directory(), sha1_to_hex(sha1));
291 fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
292 if (0 <= fd)
293 return fd;
295 /* slow path */
296 safe_create_leading_directories(name);
297 return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
300 char *get_index_file(void)
302 if (!git_index_file)
303 setup_git_env();
304 return git_index_file;
307 char *get_graft_file(void)
309 if (!git_graft_file)
310 setup_git_env();
311 return git_graft_file;
314 int set_git_dir(const char *path)
316 if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
317 return error("Could not set GIT_DIR to '%s'", path);
318 setup_git_env();
319 return 0;
322 const char *get_log_output_encoding(void)
324 return git_log_output_encoding ? git_log_output_encoding
325 : get_commit_output_encoding();
328 const char *get_commit_output_encoding(void)
330 return git_commit_encoding ? git_commit_encoding : "UTF-8";
333 static int the_shared_repository = PERM_UMASK;
334 static int need_shared_repository_from_config = 1;
336 void set_shared_repository(int value)
338 the_shared_repository = value;
339 need_shared_repository_from_config = 0;
342 int get_shared_repository(void)
344 if (need_shared_repository_from_config) {
345 const char *var = "core.sharedrepository";
346 const char *value;
347 if (!git_config_get_value(var, &value))
348 the_shared_repository = git_config_perm(var, value);
349 need_shared_repository_from_config = 0;
351 return the_shared_repository;
354 void reset_shared_repository(void)
356 need_shared_repository_from_config = 1;