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#include "refs.h"
12#include "fmt-merge-msg.h"
13#include "commit.h"
14int trust_executable_bit = 1;
16int trust_ctime = 1;
17int check_stat = 1;
18int has_symlinks = 1;
19int minimum_abbrev = 4, default_abbrev = 7;
20int ignore_case;
21int assume_unchanged;
22int prefer_symlink_refs;
23int is_bare_repository_cfg = -1; /* unspecified */
24int log_all_ref_updates = -1; /* unspecified */
25int warn_ambiguous_refs = 1;
26int warn_on_object_refname_ambiguity = 1;
27int ref_paranoia = -1;
28int repository_format_precious_objects;
29const char *git_commit_encoding;
30const char *git_log_output_encoding;
31const char *apply_default_whitespace;
32const char *apply_default_ignorewhitespace;
33const char *git_attributes_file;
34const char *git_hooks_path;
35int zlib_compression_level = Z_BEST_SPEED;
36int core_compression_level;
37int core_compression_seen;
38int fsync_object_files;
39size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
40size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
41size_t delta_base_cache_limit = 96 * 1024 * 1024;
42unsigned long big_file_threshold = 512 * 1024 * 1024;
43const char *pager_program;
44int pager_use_color = 1;
45const char *editor_program;
46const char *askpass_program;
47const char *excludes_file;
48enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
49int check_replace_refs = 1;
50char *git_replace_ref_base;
51enum eol core_eol = EOL_UNSET;
52enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
53unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
54enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
55enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
56enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
57#ifndef OBJECT_CREATION_MODE
58#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
59#endif
60enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
61char *notes_ref_name;
62int grafts_replace_parents = 1;
63int core_apply_sparse_checkout;
64int merge_log_config = -1;
65int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
66unsigned long pack_size_limit_cfg;
67#ifndef PROTECT_HFS_DEFAULT
69#define PROTECT_HFS_DEFAULT 0
70#endif
71int protect_hfs = PROTECT_HFS_DEFAULT;
72#ifndef PROTECT_NTFS_DEFAULT
74#define PROTECT_NTFS_DEFAULT 0
75#endif
76int protect_ntfs = PROTECT_NTFS_DEFAULT;
77/*
79 * The character that begins a commented line in user-editable file
80 * that is subject to stripspace.
81 */
82char comment_line_char = '#';
83int auto_comment_line_char;
84/* Parallel index stat data preload? */
86int core_preload_index = 1;
87/*
89 * This is a hack for test programs like test-dump-untracked-cache to
90 * ensure that they do not modify the untracked cache when reading it.
91 * Do not use it otherwise!
92 */
93int ignore_untracked_cache_config;
94/* This is set by setup_git_dir_gently() and/or git_default_config() */
96char *git_work_tree_cfg;
97static char *work_tree;
98static const char *namespace;
100static size_t namespace_len;
101static const char *git_dir, *git_common_dir;
103static char *git_object_dir, *git_index_file, *git_graft_file;
104int git_db_env, git_index_env, git_graft_env, git_common_dir_env;
105/*
107 * Repository-local GIT_* environment variables; see cache.h for details.
108 */
109const char * const local_repo_env[] = {
110 ALTERNATE_DB_ENVIRONMENT,
111 CONFIG_ENVIRONMENT,
112 CONFIG_DATA_ENVIRONMENT,
113 DB_ENVIRONMENT,
114 GIT_DIR_ENVIRONMENT,
115 GIT_WORK_TREE_ENVIRONMENT,
116 GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
117 GRAFT_ENVIRONMENT,
118 INDEX_ENVIRONMENT,
119 NO_REPLACE_OBJECTS_ENVIRONMENT,
120 GIT_REPLACE_REF_BASE_ENVIRONMENT,
121 GIT_PREFIX_ENVIRONMENT,
122 GIT_SHALLOW_FILE_ENVIRONMENT,
123 GIT_COMMON_DIR_ENVIRONMENT,
124 NULL
125};
126static char *expand_namespace(const char *raw_namespace)
128{
129 struct strbuf buf = STRBUF_INIT;
130 struct strbuf **components, **c;
131 if (!raw_namespace || !*raw_namespace)
133 return xstrdup("");
134 strbuf_addstr(&buf, raw_namespace);
136 components = strbuf_split(&buf, '/');
137 strbuf_reset(&buf);
138 for (c = components; *c; c++)
139 if (strcmp((*c)->buf, "/") != 0)
140 strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
141 strbuf_list_free(components);
142 if (check_refname_format(buf.buf, 0))
143 die("bad git namespace path \"%s\"", raw_namespace);
144 strbuf_addch(&buf, '/');
145 return strbuf_detach(&buf, NULL);
146}
147static char *git_path_from_env(const char *envvar, const char *git_dir,
149 const char *path, int *fromenv)
150{
151 const char *value = getenv(envvar);
152 if (!value)
153 return xstrfmt("%s/%s", git_dir, path);
154 if (fromenv)
155 *fromenv = 1;
156 return xstrdup(value);
157}
158static void setup_git_env(void)
160{
161 struct strbuf sb = STRBUF_INIT;
162 const char *gitfile;
163 const char *shallow_file;
164 const char *replace_ref_base;
165 git_dir = getenv(GIT_DIR_ENVIRONMENT);
167 if (!git_dir)
168 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
169 gitfile = read_gitfile(git_dir);
170 git_dir = xstrdup(gitfile ? gitfile : git_dir);
171 if (get_common_dir(&sb, git_dir))
172 git_common_dir_env = 1;
173 git_common_dir = strbuf_detach(&sb, NULL);
174 git_object_dir = git_path_from_env(DB_ENVIRONMENT, git_common_dir,
175 "objects", &git_db_env);
176 git_index_file = git_path_from_env(INDEX_ENVIRONMENT, git_dir,
177 "index", &git_index_env);
178 git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, git_common_dir,
179 "info/grafts", &git_graft_env);
180 if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
181 check_replace_refs = 0;
182 replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
183 git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
184 : "refs/replace/");
185 namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
186 namespace_len = strlen(namespace);
187 shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
188 if (shallow_file)
189 set_alternate_shallow_file(shallow_file, 0);
190}
191int is_bare_repository(void)
193{
194 /* if core.bare is not 'false', let's see if there is a work tree */
195 return is_bare_repository_cfg && !get_git_work_tree();
196}
197const char *get_git_dir(void)
199{
200 if (!git_dir)
201 setup_git_env();
202 return git_dir;
203}
204const char *get_git_common_dir(void)
206{
207 return git_common_dir;
208}
209const char *get_git_namespace(void)
211{
212 if (!namespace)
213 setup_git_env();
214 return namespace;
215}
216const char *strip_namespace(const char *namespaced_ref)
218{
219 if (!starts_with(namespaced_ref, get_git_namespace()))
220 return NULL;
221 return namespaced_ref + namespace_len;
222}
223static int git_work_tree_initialized;
225/*
227 * Note. This works only before you used a work tree. This was added
228 * primarily to support git-clone to work in a new repository it just
229 * created, and is not meant to flip between different work trees.
230 */
231void set_git_work_tree(const char *new_work_tree)
232{
233 if (git_work_tree_initialized) {
234 new_work_tree = real_path(new_work_tree);
235 if (strcmp(new_work_tree, work_tree))
236 die("internal error: work tree has already been set\n"
237 "Current worktree: %s\nNew worktree: %s",
238 work_tree, new_work_tree);
239 return;
240 }
241 git_work_tree_initialized = 1;
242 work_tree = xstrdup(real_path(new_work_tree));
243}
244const char *get_git_work_tree(void)
246{
247 return work_tree;
248}
249char *get_object_directory(void)
251{
252 if (!git_object_dir)
253 setup_git_env();
254 return git_object_dir;
255}
256int odb_mkstemp(char *template, size_t limit, const char *pattern)
258{
259 int fd;
260 /*
261 * we let the umask do its job, don't try to be more
262 * restrictive except to remove write permission.
263 */
264 int mode = 0444;
265 snprintf(template, limit, "%s/%s",
266 get_object_directory(), pattern);
267 fd = git_mkstemp_mode(template, mode);
268 if (0 <= fd)
269 return fd;
270 /* slow path */
272 /* some mkstemp implementations erase template on failure */
273 snprintf(template, limit, "%s/%s",
274 get_object_directory(), pattern);
275 safe_create_leading_directories(template);
276 return xmkstemp_mode(template, mode);
277}
278int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1)
280{
281 int fd;
282 snprintf(name, namesz, "%s/pack/pack-%s.keep",
284 get_object_directory(), sha1_to_hex(sha1));
285 fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
286 if (0 <= fd)
287 return fd;
288 /* slow path */
290 safe_create_leading_directories(name);
291 return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
292}
293char *get_index_file(void)
295{
296 if (!git_index_file)
297 setup_git_env();
298 return git_index_file;
299}
300char *get_graft_file(void)
302{
303 if (!git_graft_file)
304 setup_git_env();
305 return git_graft_file;
306}
307int set_git_dir(const char *path)
309{
310 if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
311 return error("Could not set GIT_DIR to '%s'", path);
312 setup_git_env();
313 return 0;
314}
315const char *get_log_output_encoding(void)
317{
318 return git_log_output_encoding ? git_log_output_encoding
319 : get_commit_output_encoding();
320}
321const char *get_commit_output_encoding(void)
323{
324 return git_commit_encoding ? git_commit_encoding : "UTF-8";
325}
326static int the_shared_repository = PERM_UMASK;
328static int need_shared_repository_from_config = 1;
329void set_shared_repository(int value)
331{
332 the_shared_repository = value;
333 need_shared_repository_from_config = 0;
334}
335int get_shared_repository(void)
337{
338 if (need_shared_repository_from_config) {
339 const char *var = "core.sharedrepository";
340 const char *value;
341 if (!git_config_get_value(var, &value))
342 the_shared_repository = git_config_perm(var, value);
343 need_shared_repository_from_config = 0;
344 }
345 return the_shared_repository;
346}