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;
67enum hide_dotfiles_type hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
68#ifndef PROTECT_HFS_DEFAULT
70#define PROTECT_HFS_DEFAULT 0
71#endif
72int protect_hfs = PROTECT_HFS_DEFAULT;
73#ifndef PROTECT_NTFS_DEFAULT
75#define PROTECT_NTFS_DEFAULT 0
76#endif
77int protect_ntfs = PROTECT_NTFS_DEFAULT;
78/*
80 * The character that begins a commented line in user-editable file
81 * that is subject to stripspace.
82 */
83char comment_line_char = '#';
84int auto_comment_line_char;
85/* Parallel index stat data preload? */
87int core_preload_index = 1;
88/*
90 * This is a hack for test programs like test-dump-untracked-cache to
91 * ensure that they do not modify the untracked cache when reading it.
92 * Do not use it otherwise!
93 */
94int ignore_untracked_cache_config;
95/* This is set by setup_git_dir_gently() and/or git_default_config() */
97char *git_work_tree_cfg;
98static char *work_tree;
99static const char *namespace;
101static size_t namespace_len;
102static const char *git_dir, *git_common_dir;
104static char *git_object_dir, *git_index_file, *git_graft_file;
105int git_db_env, git_index_env, git_graft_env, git_common_dir_env;
106/*
108 * Repository-local GIT_* environment variables; see cache.h for details.
109 */
110const char * const local_repo_env[] = {
111 ALTERNATE_DB_ENVIRONMENT,
112 CONFIG_ENVIRONMENT,
113 CONFIG_DATA_ENVIRONMENT,
114 DB_ENVIRONMENT,
115 GIT_DIR_ENVIRONMENT,
116 GIT_WORK_TREE_ENVIRONMENT,
117 GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
118 GRAFT_ENVIRONMENT,
119 INDEX_ENVIRONMENT,
120 NO_REPLACE_OBJECTS_ENVIRONMENT,
121 GIT_REPLACE_REF_BASE_ENVIRONMENT,
122 GIT_PREFIX_ENVIRONMENT,
123 GIT_SHALLOW_FILE_ENVIRONMENT,
124 GIT_COMMON_DIR_ENVIRONMENT,
125 NULL
126};
127static char *expand_namespace(const char *raw_namespace)
129{
130 struct strbuf buf = STRBUF_INIT;
131 struct strbuf **components, **c;
132 if (!raw_namespace || !*raw_namespace)
134 return xstrdup("");
135 strbuf_addstr(&buf, raw_namespace);
137 components = strbuf_split(&buf, '/');
138 strbuf_reset(&buf);
139 for (c = components; *c; c++)
140 if (strcmp((*c)->buf, "/") != 0)
141 strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
142 strbuf_list_free(components);
143 if (check_refname_format(buf.buf, 0))
144 die("bad git namespace path \"%s\"", raw_namespace);
145 strbuf_addch(&buf, '/');
146 return strbuf_detach(&buf, NULL);
147}
148static char *git_path_from_env(const char *envvar, const char *git_dir,
150 const char *path, int *fromenv)
151{
152 const char *value = getenv(envvar);
153 if (!value)
154 return xstrfmt("%s/%s", git_dir, path);
155 if (fromenv)
156 *fromenv = 1;
157 return xstrdup(value);
158}
159static void setup_git_env(void)
161{
162 struct strbuf sb = STRBUF_INIT;
163 const char *gitfile;
164 const char *shallow_file;
165 const char *replace_ref_base;
166 git_dir = getenv(GIT_DIR_ENVIRONMENT);
168 if (!git_dir)
169 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
170 gitfile = read_gitfile(git_dir);
171 git_dir = xstrdup(gitfile ? gitfile : git_dir);
172 if (get_common_dir(&sb, git_dir))
173 git_common_dir_env = 1;
174 git_common_dir = strbuf_detach(&sb, NULL);
175 git_object_dir = git_path_from_env(DB_ENVIRONMENT, git_common_dir,
176 "objects", &git_db_env);
177 git_index_file = git_path_from_env(INDEX_ENVIRONMENT, git_dir,
178 "index", &git_index_env);
179 git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, git_common_dir,
180 "info/grafts", &git_graft_env);
181 if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
182 check_replace_refs = 0;
183 replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
184 git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
185 : "refs/replace/");
186 namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
187 namespace_len = strlen(namespace);
188 shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
189 if (shallow_file)
190 set_alternate_shallow_file(shallow_file, 0);
191}
192int is_bare_repository(void)
194{
195 /* if core.bare is not 'false', let's see if there is a work tree */
196 return is_bare_repository_cfg && !get_git_work_tree();
197}
198const char *get_git_dir(void)
200{
201 if (!git_dir)
202 setup_git_env();
203 return git_dir;
204}
205const char *get_git_common_dir(void)
207{
208 return git_common_dir;
209}
210const char *get_git_namespace(void)
212{
213 if (!namespace)
214 setup_git_env();
215 return namespace;
216}
217const char *strip_namespace(const char *namespaced_ref)
219{
220 if (!starts_with(namespaced_ref, get_git_namespace()))
221 return NULL;
222 return namespaced_ref + namespace_len;
223}
224static int git_work_tree_initialized;
226/*
228 * Note. This works only before you used a work tree. This was added
229 * primarily to support git-clone to work in a new repository it just
230 * created, and is not meant to flip between different work trees.
231 */
232void set_git_work_tree(const char *new_work_tree)
233{
234 if (git_work_tree_initialized) {
235 new_work_tree = real_path(new_work_tree);
236 if (strcmp(new_work_tree, work_tree))
237 die("internal error: work tree has already been set\n"
238 "Current worktree: %s\nNew worktree: %s",
239 work_tree, new_work_tree);
240 return;
241 }
242 git_work_tree_initialized = 1;
243 work_tree = xstrdup(real_path(new_work_tree));
244}
245const char *get_git_work_tree(void)
247{
248 return work_tree;
249}
250char *get_object_directory(void)
252{
253 if (!git_object_dir)
254 setup_git_env();
255 return git_object_dir;
256}
257int odb_mkstemp(char *template, size_t limit, const char *pattern)
259{
260 int fd;
261 /*
262 * we let the umask do its job, don't try to be more
263 * restrictive except to remove write permission.
264 */
265 int mode = 0444;
266 snprintf(template, limit, "%s/%s",
267 get_object_directory(), pattern);
268 fd = git_mkstemp_mode(template, mode);
269 if (0 <= fd)
270 return fd;
271 /* slow path */
273 /* some mkstemp implementations erase template on failure */
274 snprintf(template, limit, "%s/%s",
275 get_object_directory(), pattern);
276 safe_create_leading_directories(template);
277 return xmkstemp_mode(template, mode);
278}
279int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1)
281{
282 int fd;
283 snprintf(name, namesz, "%s/pack/pack-%s.keep",
285 get_object_directory(), sha1_to_hex(sha1));
286 fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
287 if (0 <= fd)
288 return fd;
289 /* slow path */
291 safe_create_leading_directories(name);
292 return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
293}
294char *get_index_file(void)
296{
297 if (!git_index_file)
298 setup_git_env();
299 return git_index_file;
300}
301char *get_graft_file(void)
303{
304 if (!git_graft_file)
305 setup_git_env();
306 return git_graft_file;
307}
308int set_git_dir(const char *path)
310{
311 if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
312 return error("Could not set GIT_DIR to '%s'", path);
313 setup_git_env();
314 return 0;
315}
316const char *get_log_output_encoding(void)
318{
319 return git_log_output_encoding ? git_log_output_encoding
320 : get_commit_output_encoding();
321}
322const char *get_commit_output_encoding(void)
324{
325 return git_commit_encoding ? git_commit_encoding : "UTF-8";
326}
327static int the_shared_repository = PERM_UMASK;
329static int need_shared_repository_from_config = 1;
330void set_shared_repository(int value)
332{
333 the_shared_repository = value;
334 need_shared_repository_from_config = 0;
335}
336int get_shared_repository(void)
338{
339 if (need_shared_repository_from_config) {
340 const char *var = "core.sharedrepository";
341 const char *value;
342 if (!git_config_get_value(var, &value))
343 the_shared_repository = git_config_perm(var, value);
344 need_shared_repository_from_config = 0;
345 }
346 return the_shared_repository;
347}