request-pull: use the branch description
[git/git.git] / environment.c
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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
13char git_default_email[MAX_GITNAME];
14char git_default_name[MAX_GITNAME];
15int user_ident_explicitly_given;
16int trust_executable_bit = 1;
17int trust_ctime = 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 repository_format_version;
27const char *git_commit_encoding;
28const char *git_log_output_encoding;
29int shared_repository = PERM_UMASK;
30const char *apply_default_whitespace;
31const char *apply_default_ignorewhitespace;
32int zlib_compression_level = Z_BEST_SPEED;
33int core_compression_level;
34int core_compression_seen;
35int fsync_object_files;
36size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
37size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
38size_t delta_base_cache_limit = 16 * 1024 * 1024;
39unsigned long big_file_threshold = 512 * 1024 * 1024;
40const char *log_pack_access;
41const char *pager_program;
42int pager_use_color = 1;
43const char *editor_program;
44const char *askpass_program;
45const char *excludes_file;
46enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
47int read_replace_refs = 1; /* NEEDSWORK: rename to use_replace_refs */
48enum eol core_eol = EOL_UNSET;
49enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
50unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
51enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
52enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
53enum push_default_type push_default = PUSH_DEFAULT_MATCHING;
54#ifndef OBJECT_CREATION_MODE
55#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
56#endif
57enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
58char *notes_ref_name;
59int grafts_replace_parents = 1;
60int core_apply_sparse_checkout;
61struct startup_info *startup_info;
62
63/* Parallel index stat data preload? */
64int core_preload_index = 0;
65
66/* This is set by setup_git_dir_gently() and/or git_default_config() */
67char *git_work_tree_cfg;
68static char *work_tree;
69
70static const char *namespace;
71static size_t namespace_len;
72
73static const char *git_dir;
74static char *git_object_dir, *git_index_file, *git_graft_file;
75
76/*
77 * Repository-local GIT_* environment variables
78 * Remember to update local_repo_env_size in cache.h when
79 * the size of the list changes
80 */
81const char * const local_repo_env[LOCAL_REPO_ENV_SIZE + 1] = {
82 ALTERNATE_DB_ENVIRONMENT,
83 CONFIG_ENVIRONMENT,
84 CONFIG_DATA_ENVIRONMENT,
85 DB_ENVIRONMENT,
86 GIT_DIR_ENVIRONMENT,
87 GIT_WORK_TREE_ENVIRONMENT,
88 GRAFT_ENVIRONMENT,
89 INDEX_ENVIRONMENT,
90 NO_REPLACE_OBJECTS_ENVIRONMENT,
91 NULL
92};
93
94static char *expand_namespace(const char *raw_namespace)
95{
96 struct strbuf buf = STRBUF_INIT;
97 struct strbuf **components, **c;
98
99 if (!raw_namespace || !*raw_namespace)
100 return xstrdup("");
101
102 strbuf_addstr(&buf, raw_namespace);
103 components = strbuf_split(&buf, '/');
104 strbuf_reset(&buf);
105 for (c = components; *c; c++)
106 if (strcmp((*c)->buf, "/") != 0)
107 strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
108 strbuf_list_free(components);
109 if (check_ref_format(buf.buf) != CHECK_REF_FORMAT_OK)
110 die("bad git namespace path \"%s\"", raw_namespace);
111 strbuf_addch(&buf, '/');
112 return strbuf_detach(&buf, NULL);
113}
114
115static void setup_git_env(void)
116{
117 git_dir = getenv(GIT_DIR_ENVIRONMENT);
118 git_dir = git_dir ? xstrdup(git_dir) : NULL;
119 if (!git_dir) {
120 git_dir = read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
121 git_dir = git_dir ? xstrdup(git_dir) : NULL;
122 }
123 if (!git_dir)
124 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
125 git_object_dir = getenv(DB_ENVIRONMENT);
126 if (!git_object_dir) {
127 git_object_dir = xmalloc(strlen(git_dir) + 9);
128 sprintf(git_object_dir, "%s/objects", git_dir);
129 }
130 git_index_file = getenv(INDEX_ENVIRONMENT);
131 if (!git_index_file) {
132 git_index_file = xmalloc(strlen(git_dir) + 7);
133 sprintf(git_index_file, "%s/index", git_dir);
134 }
135 git_graft_file = getenv(GRAFT_ENVIRONMENT);
136 if (!git_graft_file)
137 git_graft_file = git_pathdup("info/grafts");
138 if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
139 read_replace_refs = 0;
140 namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
141 namespace_len = strlen(namespace);
142}
143
144int is_bare_repository(void)
145{
146 /* if core.bare is not 'false', let's see if there is a work tree */
147 return is_bare_repository_cfg && !get_git_work_tree();
148}
149
150int have_git_dir(void)
151{
152 return !!git_dir;
153}
154
155const char *get_git_dir(void)
156{
157 if (!git_dir)
158 setup_git_env();
159 return git_dir;
160}
161
162const char *get_git_namespace(void)
163{
164 if (!namespace)
165 setup_git_env();
166 return namespace;
167}
168
169const char *strip_namespace(const char *namespaced_ref)
170{
171 if (prefixcmp(namespaced_ref, get_git_namespace()) != 0)
172 return NULL;
173 return namespaced_ref + namespace_len;
174}
175
176static int git_work_tree_initialized;
177
178/*
179 * Note. This works only before you used a work tree. This was added
180 * primarily to support git-clone to work in a new repository it just
181 * created, and is not meant to flip between different work trees.
182 */
183void set_git_work_tree(const char *new_work_tree)
184{
185 if (git_work_tree_initialized) {
186 new_work_tree = real_path(new_work_tree);
187 if (strcmp(new_work_tree, work_tree))
188 die("internal error: work tree has already been set\n"
189 "Current worktree: %s\nNew worktree: %s",
190 work_tree, new_work_tree);
191 return;
192 }
193 git_work_tree_initialized = 1;
194 work_tree = xstrdup(real_path(new_work_tree));
195}
196
197const char *get_git_work_tree(void)
198{
199 return work_tree;
200}
201
202char *get_object_directory(void)
203{
204 if (!git_object_dir)
205 setup_git_env();
206 return git_object_dir;
207}
208
209int odb_mkstemp(char *template, size_t limit, const char *pattern)
210{
211 int fd;
212 /*
213 * we let the umask do its job, don't try to be more
214 * restrictive except to remove write permission.
215 */
216 int mode = 0444;
217 snprintf(template, limit, "%s/%s",
218 get_object_directory(), pattern);
219 fd = git_mkstemp_mode(template, mode);
220 if (0 <= fd)
221 return fd;
222
223 /* slow path */
224 /* some mkstemp implementations erase template on failure */
225 snprintf(template, limit, "%s/%s",
226 get_object_directory(), pattern);
227 safe_create_leading_directories(template);
228 return xmkstemp_mode(template, mode);
229}
230
231int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1)
232{
233 int fd;
234
235 snprintf(name, namesz, "%s/pack/pack-%s.keep",
236 get_object_directory(), sha1_to_hex(sha1));
237 fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
238 if (0 <= fd)
239 return fd;
240
241 /* slow path */
242 safe_create_leading_directories(name);
243 return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
244}
245
246char *get_index_file(void)
247{
248 if (!git_index_file)
249 setup_git_env();
250 return git_index_file;
251}
252
253char *get_graft_file(void)
254{
255 if (!git_graft_file)
256 setup_git_env();
257 return git_graft_file;
258}
259
260int set_git_dir(const char *path)
261{
262 if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
263 return error("Could not set GIT_DIR to '%s'", path);
264 setup_git_env();
265 return 0;
266}
267
268const char *get_log_output_encoding(void)
269{
270 return git_log_output_encoding ? git_log_output_encoding
271 : get_commit_output_encoding();
272}
273
274const char *get_commit_output_encoding(void)
275{
276 return git_commit_encoding ? git_commit_encoding : "UTF-8";
277}