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"
14
15int 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
69#ifndef PROTECT_HFS_DEFAULT
70#define PROTECT_HFS_DEFAULT 0
71#endif
72int protect_hfs = PROTECT_HFS_DEFAULT;
73
74#ifndef PROTECT_NTFS_DEFAULT
75#define PROTECT_NTFS_DEFAULT 0
76#endif
77int protect_ntfs = PROTECT_NTFS_DEFAULT;
78
79/*
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
86/* Parallel index stat data preload? */
87int core_preload_index = 1;
88
89/*
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
96/* This is set by setup_git_dir_gently() and/or git_default_config() */
97char *git_work_tree_cfg;
98static char *work_tree;
99
100static const char *namespace;
101static size_t namespace_len;
102
103static const char *super_prefix;
104
105static const char *git_dir, *git_common_dir;
106static char *git_object_dir, *git_index_file, *git_graft_file;
107int git_db_env, git_index_env, git_graft_env, git_common_dir_env;
108
109/*
110 * Repository-local GIT_* environment variables; see cache.h for details.
111 */
112const char * const local_repo_env[] = {
113 ALTERNATE_DB_ENVIRONMENT,
114 CONFIG_ENVIRONMENT,
115 CONFIG_DATA_ENVIRONMENT,
116 DB_ENVIRONMENT,
117 GIT_DIR_ENVIRONMENT,
118 GIT_WORK_TREE_ENVIRONMENT,
119 GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
120 GRAFT_ENVIRONMENT,
121 INDEX_ENVIRONMENT,
122 NO_REPLACE_OBJECTS_ENVIRONMENT,
123 GIT_REPLACE_REF_BASE_ENVIRONMENT,
124 GIT_PREFIX_ENVIRONMENT,
125 GIT_SUPER_PREFIX_ENVIRONMENT,
126 GIT_SHALLOW_FILE_ENVIRONMENT,
127 GIT_COMMON_DIR_ENVIRONMENT,
128 NULL
129};
130
131static char *expand_namespace(const char *raw_namespace)
132{
133 struct strbuf buf = STRBUF_INIT;
134 struct strbuf **components, **c;
135
136 if (!raw_namespace || !*raw_namespace)
137 return xstrdup("");
138
139 strbuf_addstr(&buf, raw_namespace);
140 components = strbuf_split(&buf, '/');
141 strbuf_reset(&buf);
142 for (c = components; *c; c++)
143 if (strcmp((*c)->buf, "/") != 0)
144 strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
145 strbuf_list_free(components);
146 if (check_refname_format(buf.buf, 0))
147 die("bad git namespace path \"%s\"", raw_namespace);
148 strbuf_addch(&buf, '/');
149 return strbuf_detach(&buf, NULL);
150}
151
152static char *git_path_from_env(const char *envvar, const char *git_dir,
153 const char *path, int *fromenv)
154{
155 const char *value = getenv(envvar);
156 if (!value)
157 return xstrfmt("%s/%s", git_dir, path);
158 if (fromenv)
159 *fromenv = 1;
160 return xstrdup(value);
161}
162
163static void setup_git_env(void)
164{
165 struct strbuf sb = STRBUF_INIT;
166 const char *gitfile;
167 const char *shallow_file;
168 const char *replace_ref_base;
169
170 git_dir = getenv(GIT_DIR_ENVIRONMENT);
171 if (!git_dir)
172 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
173 gitfile = read_gitfile(git_dir);
174 git_dir = xstrdup(gitfile ? gitfile : git_dir);
175 if (get_common_dir(&sb, git_dir))
176 git_common_dir_env = 1;
177 git_common_dir = strbuf_detach(&sb, NULL);
178 git_object_dir = git_path_from_env(DB_ENVIRONMENT, git_common_dir,
179 "objects", &git_db_env);
180 git_index_file = git_path_from_env(INDEX_ENVIRONMENT, git_dir,
181 "index", &git_index_env);
182 git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, git_common_dir,
183 "info/grafts", &git_graft_env);
184 if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
185 check_replace_refs = 0;
186 replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
187 git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
188 : "refs/replace/");
189 namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
190 namespace_len = strlen(namespace);
191 shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
192 if (shallow_file)
193 set_alternate_shallow_file(shallow_file, 0);
194}
195
196int is_bare_repository(void)
197{
198 /* if core.bare is not 'false', let's see if there is a work tree */
199 return is_bare_repository_cfg && !get_git_work_tree();
200}
201
202const char *get_git_dir(void)
203{
204 if (!git_dir)
205 setup_git_env();
206 return git_dir;
207}
208
209const char *get_git_common_dir(void)
210{
211 return git_common_dir;
212}
213
214const char *get_git_namespace(void)
215{
216 if (!namespace)
217 setup_git_env();
218 return namespace;
219}
220
221const char *strip_namespace(const char *namespaced_ref)
222{
223 if (!starts_with(namespaced_ref, get_git_namespace()))
224 return NULL;
225 return namespaced_ref + namespace_len;
226}
227
228const char *get_super_prefix(void)
229{
230 static int initialized;
231 if (!initialized) {
232 super_prefix = getenv(GIT_SUPER_PREFIX_ENVIRONMENT);
233 initialized = 1;
234 }
235 return super_prefix;
236}
237
238static int git_work_tree_initialized;
239
240/*
241 * Note. This works only before you used a work tree. This was added
242 * primarily to support git-clone to work in a new repository it just
243 * created, and is not meant to flip between different work trees.
244 */
245void set_git_work_tree(const char *new_work_tree)
246{
247 if (git_work_tree_initialized) {
248 new_work_tree = real_path(new_work_tree);
249 if (strcmp(new_work_tree, work_tree))
250 die("internal error: work tree has already been set\n"
251 "Current worktree: %s\nNew worktree: %s",
252 work_tree, new_work_tree);
253 return;
254 }
255 git_work_tree_initialized = 1;
256 work_tree = xstrdup(real_path(new_work_tree));
257}
258
259const char *get_git_work_tree(void)
260{
261 return work_tree;
262}
263
264char *get_object_directory(void)
265{
266 if (!git_object_dir)
267 setup_git_env();
268 return git_object_dir;
269}
270
271int odb_mkstemp(char *template, size_t limit, const char *pattern)
272{
273 int fd;
274 /*
275 * we let the umask do its job, don't try to be more
276 * restrictive except to remove write permission.
277 */
278 int mode = 0444;
279 snprintf(template, limit, "%s/%s",
280 get_object_directory(), pattern);
281 fd = git_mkstemp_mode(template, mode);
282 if (0 <= fd)
283 return fd;
284
285 /* slow path */
286 /* some mkstemp implementations erase template on failure */
287 snprintf(template, limit, "%s/%s",
288 get_object_directory(), pattern);
289 safe_create_leading_directories(template);
290 return xmkstemp_mode(template, mode);
291}
292
293int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1)
294{
295 int fd;
296
297 snprintf(name, namesz, "%s/pack/pack-%s.keep",
298 get_object_directory(), sha1_to_hex(sha1));
299 fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
300 if (0 <= fd)
301 return fd;
302
303 /* slow path */
304 safe_create_leading_directories(name);
305 return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
306}
307
308char *get_index_file(void)
309{
310 if (!git_index_file)
311 setup_git_env();
312 return git_index_file;
313}
314
315char *get_graft_file(void)
316{
317 if (!git_graft_file)
318 setup_git_env();
319 return git_graft_file;
320}
321
322int set_git_dir(const char *path)
323{
324 if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
325 return error("Could not set GIT_DIR to '%s'", path);
326 setup_git_env();
327 return 0;
328}
329
330const char *get_log_output_encoding(void)
331{
332 return git_log_output_encoding ? git_log_output_encoding
333 : get_commit_output_encoding();
334}
335
336const char *get_commit_output_encoding(void)
337{
338 return git_commit_encoding ? git_commit_encoding : "UTF-8";
339}
340
341static int the_shared_repository = PERM_UMASK;
342static int need_shared_repository_from_config = 1;
343
344void set_shared_repository(int value)
345{
346 the_shared_repository = value;
347 need_shared_repository_from_config = 0;
348}
349
350int get_shared_repository(void)
351{
352 if (need_shared_repository_from_config) {
353 const char *var = "core.sharedrepository";
354 const char *value;
355 if (!git_config_get_value(var, &value))
356 the_shared_repository = git_config_perm(var, value);
357 need_shared_repository_from_config = 0;
358 }
359 return the_shared_repository;
360}