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"
13int trust_executable_bit = 1;
15int trust_ctime = 1;
16int has_symlinks = 1;
17int minimum_abbrev = 4, default_abbrev = 7;
18int ignore_case;
19int assume_unchanged;
20int prefer_symlink_refs;
21int is_bare_repository_cfg = -1; /* unspecified */
22int log_all_ref_updates = -1; /* unspecified */
23int warn_ambiguous_refs = 1;
24int repository_format_version;
25const char *git_commit_encoding;
26const char *git_log_output_encoding;
27int shared_repository = PERM_UMASK;
28const char *apply_default_whitespace;
29const char *apply_default_ignorewhitespace;
30const char *git_attributes_file;
31int zlib_compression_level = Z_BEST_SPEED;
32int core_compression_level;
33int core_compression_seen;
34int fsync_object_files;
35size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
36size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
37size_t delta_base_cache_limit = 16 * 1024 * 1024;
38unsigned long big_file_threshold = 512 * 1024 * 1024;
39const char *log_pack_access;
40const char *pager_program;
41int pager_use_color = 1;
42const char *editor_program;
43const char *askpass_program;
44const char *excludes_file;
45enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
46int read_replace_refs = 1; /* NEEDSWORK: rename to use_replace_refs */
47enum eol core_eol = EOL_UNSET;
48enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
49unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
50enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
51enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
52enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
53#ifndef OBJECT_CREATION_MODE
54#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
55#endif
56enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
57char *notes_ref_name;
58int grafts_replace_parents = 1;
59int core_apply_sparse_checkout;
60int merge_log_config = -1;
61int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
62struct startup_info *startup_info;
63unsigned long pack_size_limit_cfg;
64/* Parallel index stat data preload? */
66int core_preload_index = 0;
67/* This is set by setup_git_dir_gently() and/or git_default_config() */
69char *git_work_tree_cfg;
70static char *work_tree;
71static const char *namespace;
73static size_t namespace_len;
74static const char *git_dir;
76static char *git_object_dir, *git_index_file, *git_graft_file;
77/*
79 * Repository-local GIT_* environment variables
80 * Remember to update local_repo_env_size in cache.h when
81 * the size of the list changes
82 */
83const char * const local_repo_env[LOCAL_REPO_ENV_SIZE + 1] = {
84 ALTERNATE_DB_ENVIRONMENT,
85 CONFIG_ENVIRONMENT,
86 CONFIG_DATA_ENVIRONMENT,
87 DB_ENVIRONMENT,
88 GIT_DIR_ENVIRONMENT,
89 GIT_WORK_TREE_ENVIRONMENT,
90 GRAFT_ENVIRONMENT,
91 INDEX_ENVIRONMENT,
92 NO_REPLACE_OBJECTS_ENVIRONMENT,
93 NULL
94};
95static char *expand_namespace(const char *raw_namespace)
97{
98 struct strbuf buf = STRBUF_INIT;
99 struct strbuf **components, **c;
100 if (!raw_namespace || !*raw_namespace)
102 return xstrdup("");
103 strbuf_addstr(&buf, raw_namespace);
105 components = strbuf_split(&buf, '/');
106 strbuf_reset(&buf);
107 for (c = components; *c; c++)
108 if (strcmp((*c)->buf, "/") != 0)
109 strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
110 strbuf_list_free(components);
111 if (check_refname_format(buf.buf, 0))
112 die("bad git namespace path \"%s\"", raw_namespace);
113 strbuf_addch(&buf, '/');
114 return strbuf_detach(&buf, NULL);
115}
116static void setup_git_env(void)
118{
119 git_dir = getenv(GIT_DIR_ENVIRONMENT);
120 git_dir = git_dir ? xstrdup(git_dir) : NULL;
121 if (!git_dir) {
122 git_dir = read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
123 git_dir = git_dir ? xstrdup(git_dir) : NULL;
124 }
125 if (!git_dir)
126 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
127 git_object_dir = getenv(DB_ENVIRONMENT);
128 if (!git_object_dir) {
129 git_object_dir = xmalloc(strlen(git_dir) + 9);
130 sprintf(git_object_dir, "%s/objects", git_dir);
131 }
132 git_index_file = getenv(INDEX_ENVIRONMENT);
133 if (!git_index_file) {
134 git_index_file = xmalloc(strlen(git_dir) + 7);
135 sprintf(git_index_file, "%s/index", git_dir);
136 }
137 git_graft_file = getenv(GRAFT_ENVIRONMENT);
138 if (!git_graft_file)
139 git_graft_file = git_pathdup("info/grafts");
140 if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
141 read_replace_refs = 0;
142 namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
143 namespace_len = strlen(namespace);
144}
145int is_bare_repository(void)
147{
148 /* if core.bare is not 'false', let's see if there is a work tree */
149 return is_bare_repository_cfg && !get_git_work_tree();
150}
151int have_git_dir(void)
153{
154 return !!git_dir;
155}
156const char *get_git_dir(void)
158{
159 if (!git_dir)
160 setup_git_env();
161 return git_dir;
162}
163const char *get_git_namespace(void)
165{
166 if (!namespace)
167 setup_git_env();
168 return namespace;
169}
170const char *strip_namespace(const char *namespaced_ref)
172{
173 if (prefixcmp(namespaced_ref, get_git_namespace()) != 0)
174 return NULL;
175 return namespaced_ref + namespace_len;
176}
177static int git_work_tree_initialized;
179/*
181 * Note. This works only before you used a work tree. This was added
182 * primarily to support git-clone to work in a new repository it just
183 * created, and is not meant to flip between different work trees.
184 */
185void set_git_work_tree(const char *new_work_tree)
186{
187 if (git_work_tree_initialized) {
188 new_work_tree = real_path(new_work_tree);
189 if (strcmp(new_work_tree, work_tree))
190 die("internal error: work tree has already been set\n"
191 "Current worktree: %s\nNew worktree: %s",
192 work_tree, new_work_tree);
193 return;
194 }
195 git_work_tree_initialized = 1;
196 work_tree = xstrdup(real_path(new_work_tree));
197}
198const char *get_git_work_tree(void)
200{
201 return work_tree;
202}
203char *get_object_directory(void)
205{
206 if (!git_object_dir)
207 setup_git_env();
208 return git_object_dir;
209}
210int odb_mkstemp(char *template, size_t limit, const char *pattern)
212{
213 int fd;
214 /*
215 * we let the umask do its job, don't try to be more
216 * restrictive except to remove write permission.
217 */
218 int mode = 0444;
219 snprintf(template, limit, "%s/%s",
220 get_object_directory(), pattern);
221 fd = git_mkstemp_mode(template, mode);
222 if (0 <= fd)
223 return fd;
224 /* slow path */
226 /* some mkstemp implementations erase template on failure */
227 snprintf(template, limit, "%s/%s",
228 get_object_directory(), pattern);
229 safe_create_leading_directories(template);
230 return xmkstemp_mode(template, mode);
231}
232int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1)
234{
235 int fd;
236 snprintf(name, namesz, "%s/pack/pack-%s.keep",
238 get_object_directory(), sha1_to_hex(sha1));
239 fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
240 if (0 <= fd)
241 return fd;
242 /* slow path */
244 safe_create_leading_directories(name);
245 return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
246}
247char *get_index_file(void)
249{
250 if (!git_index_file)
251 setup_git_env();
252 return git_index_file;
253}
254char *get_graft_file(void)
256{
257 if (!git_graft_file)
258 setup_git_env();
259 return git_graft_file;
260}
261int set_git_dir(const char *path)
263{
264 if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
265 return error("Could not set GIT_DIR to '%s'", path);
266 setup_git_env();
267 return 0;
268}
269const char *get_log_output_encoding(void)
271{
272 return git_log_output_encoding ? git_log_output_encoding
273 : get_commit_output_encoding();
274}
275const char *get_commit_output_encoding(void)
277{
278 return git_commit_encoding ? git_commit_encoding : "UTF-8";
279}