Git 2.0
[git/git.git] / environment.c
CommitLineData
e1b10391
LT
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"
a1bea2c1 11#include "refs.h"
273c7032 12#include "fmt-merge-msg.h"
069c0532 13#include "commit.h"
e1b10391 14
e1b10391 15int trust_executable_bit = 1;
1ce4790b 16int trust_ctime = 1;
c08e4d5b 17int check_stat = 1;
78a8d641 18int has_symlinks = 1;
dce96489 19int minimum_abbrev = 4, default_abbrev = 7;
0a9b88b7 20int ignore_case;
96f1e58f
DR
21int assume_unchanged;
22int prefer_symlink_refs;
7d1864ce 23int is_bare_repository_cfg = -1; /* unspecified */
510c5a8e 24int log_all_ref_updates = -1; /* unspecified */
1b371f56 25int warn_ambiguous_refs = 1;
25fba78d 26int warn_on_object_refname_ambiguity = 1;
96f1e58f 27int repository_format_version;
1a8f2741 28const char *git_commit_encoding;
3a55602e 29const char *git_log_output_encoding;
94df2506 30int shared_repository = PERM_UMASK;
96f1e58f 31const char *apply_default_whitespace;
86c91f91 32const char *apply_default_ignorewhitespace;
64589a03 33const char *git_attributes_file;
960ccca6
DH
34int zlib_compression_level = Z_BEST_SPEED;
35int core_compression_level;
36int core_compression_seen;
aafe9fba 37int fsync_object_files;
8c82534d
SP
38size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
39size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
18bdec11 40size_t delta_base_cache_limit = 16 * 1024 * 1024;
15366280 41unsigned long big_file_threshold = 512 * 1024 * 1024;
872da32d 42const char *pager_program;
aa086eb8 43int pager_use_color = 1;
ee9601e6 44const char *editor_program;
d3e7da89 45const char *askpass_program;
dfb068be 46const char *excludes_file;
fd6cce9e 47enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
afc711b8 48int check_replace_refs = 1;
ec70f52f 49enum eol core_eol = EOL_UNSET;
21e5ad50 50enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
cf1b7869 51unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
9ed36cfa 52enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
c998ae9b 53enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
f25950f3 54enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
348df166
JS
55#ifndef OBJECT_CREATION_MODE
56#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
be66a6c4 57#endif
348df166 58enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
a97a7468 59char *notes_ref_name;
7f3140cd 60int grafts_replace_parents = 1;
08aefc9e 61int core_apply_sparse_checkout;
898eacd8 62int merge_log_config = -1;
76759c7d 63int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
e37c1329 64struct startup_info *startup_info;
568508e7 65unsigned long pack_size_limit_cfg;
e1b10391 66
eff80a9f
JH
67/*
68 * The character that begins a commented line in user-editable file
69 * that is subject to stripspace.
70 */
71char comment_line_char = '#';
72
671c9b7e
LT
73/* Parallel index stat data preload? */
74int core_preload_index = 0;
75
e90fdc39
JS
76/* This is set by setup_git_dir_gently() and/or git_default_config() */
77char *git_work_tree_cfg;
19757d80 78static char *work_tree;
e90fdc39 79
a1bea2c1
JT
80static const char *namespace;
81static size_t namespace_len;
82
c5fba16c 83static const char *git_dir;
7f7868ea 84static char *git_object_dir, *git_index_file, *git_graft_file;
c5fba16c 85
48a7c1c4 86/*
2163e5db 87 * Repository-local GIT_* environment variables; see cache.h for details.
48a7c1c4 88 */
2163e5db 89const char * const local_repo_env[] = {
48a7c1c4
GB
90 ALTERNATE_DB_ENVIRONMENT,
91 CONFIG_ENVIRONMENT,
655e8d9c 92 CONFIG_DATA_ENVIRONMENT,
48a7c1c4
GB
93 DB_ENVIRONMENT,
94 GIT_DIR_ENVIRONMENT,
95 GIT_WORK_TREE_ENVIRONMENT,
2cd83d10 96 GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
48a7c1c4
GB
97 GRAFT_ENVIRONMENT,
98 INDEX_ENVIRONMENT,
99 NO_REPLACE_OBJECTS_ENVIRONMENT,
a6f7f9a3 100 GIT_PREFIX_ENVIRONMENT,
069c0532 101 GIT_SHALLOW_FILE_ENVIRONMENT,
48a7c1c4
GB
102 NULL
103};
104
a1bea2c1
JT
105static char *expand_namespace(const char *raw_namespace)
106{
107 struct strbuf buf = STRBUF_INIT;
108 struct strbuf **components, **c;
109
110 if (!raw_namespace || !*raw_namespace)
111 return xstrdup("");
112
113 strbuf_addstr(&buf, raw_namespace);
114 components = strbuf_split(&buf, '/');
115 strbuf_reset(&buf);
116 for (c = components; *c; c++)
117 if (strcmp((*c)->buf, "/") != 0)
118 strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
119 strbuf_list_free(components);
8d9c5010 120 if (check_refname_format(buf.buf, 0))
a1bea2c1
JT
121 die("bad git namespace path \"%s\"", raw_namespace);
122 strbuf_addch(&buf, '/');
123 return strbuf_detach(&buf, NULL);
124}
125
e1b10391
LT
126static void setup_git_env(void)
127{
487a2b73 128 const char *gitfile;
069c0532 129 const char *shallow_file;
487a2b73 130
e1b10391
LT
131 git_dir = getenv(GIT_DIR_ENVIRONMENT);
132 if (!git_dir)
133 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
487a2b73
NTND
134 gitfile = read_gitfile(git_dir);
135 git_dir = xstrdup(gitfile ? gitfile : git_dir);
e1b10391
LT
136 git_object_dir = getenv(DB_ENVIRONMENT);
137 if (!git_object_dir) {
138 git_object_dir = xmalloc(strlen(git_dir) + 9);
139 sprintf(git_object_dir, "%s/objects", git_dir);
140 }
e1b10391
LT
141 git_index_file = getenv(INDEX_ENVIRONMENT);
142 if (!git_index_file) {
143 git_index_file = xmalloc(strlen(git_dir) + 7);
144 sprintf(git_index_file, "%s/index", git_dir);
145 }
146 git_graft_file = getenv(GRAFT_ENVIRONMENT);
147 if (!git_graft_file)
a4f34cbb 148 git_graft_file = git_pathdup("info/grafts");
6476b38b 149 if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
afc711b8 150 check_replace_refs = 0;
a1bea2c1
JT
151 namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
152 namespace_len = strlen(namespace);
069c0532
NTND
153 shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
154 if (shallow_file)
155 set_alternate_shallow_file(shallow_file, 0);
0bee5918
SP
156}
157
7d1864ce 158int is_bare_repository(void)
0bee5918 159{
e90fdc39
JS
160 /* if core.bare is not 'false', let's see if there is a work tree */
161 return is_bare_repository_cfg && !get_git_work_tree();
e1b10391
LT
162}
163
c5fba16c 164const char *get_git_dir(void)
e1b10391
LT
165{
166 if (!git_dir)
167 setup_git_env();
168 return git_dir;
169}
170
a1bea2c1
JT
171const char *get_git_namespace(void)
172{
173 if (!namespace)
174 setup_git_env();
175 return namespace;
176}
177
178const char *strip_namespace(const char *namespaced_ref)
179{
59556548 180 if (!starts_with(namespaced_ref, get_git_namespace()))
a1bea2c1
JT
181 return NULL;
182 return namespaced_ref + namespace_len;
183}
184
19757d80
DB
185static int git_work_tree_initialized;
186
187/*
188 * Note. This works only before you used a work tree. This was added
189 * primarily to support git-clone to work in a new repository it just
190 * created, and is not meant to flip between different work trees.
191 */
192void set_git_work_tree(const char *new_work_tree)
193{
83518360 194 if (git_work_tree_initialized) {
e2a57aac 195 new_work_tree = real_path(new_work_tree);
83518360
NTND
196 if (strcmp(new_work_tree, work_tree))
197 die("internal error: work tree has already been set\n"
198 "Current worktree: %s\nNew worktree: %s",
199 work_tree, new_work_tree);
200 return;
201 }
19757d80 202 git_work_tree_initialized = 1;
e2a57aac 203 work_tree = xstrdup(real_path(new_work_tree));
19757d80
DB
204}
205
e90fdc39
JS
206const char *get_git_work_tree(void)
207{
e90fdc39
JS
208 return work_tree;
209}
210
e1b10391
LT
211char *get_object_directory(void)
212{
213 if (!git_object_dir)
214 setup_git_env();
215 return git_object_dir;
216}
217
463db9b1
JN
218int odb_mkstemp(char *template, size_t limit, const char *pattern)
219{
220 int fd;
221 /*
222 * we let the umask do its job, don't try to be more
223 * restrictive except to remove write permission.
224 */
225 int mode = 0444;
226 snprintf(template, limit, "%s/%s",
227 get_object_directory(), pattern);
228 fd = git_mkstemp_mode(template, mode);
229 if (0 <= fd)
230 return fd;
231
232 /* slow path */
233 /* some mkstemp implementations erase template on failure */
234 snprintf(template, limit, "%s/%s",
235 get_object_directory(), pattern);
236 safe_create_leading_directories(template);
237 return xmkstemp_mode(template, mode);
238}
239
8640d496 240int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1)
463db9b1
JN
241{
242 int fd;
243
244 snprintf(name, namesz, "%s/pack/pack-%s.keep",
245 get_object_directory(), sha1_to_hex(sha1));
246 fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
247 if (0 <= fd)
248 return fd;
249
250 /* slow path */
251 safe_create_leading_directories(name);
252 return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
253}
254
e1b10391
LT
255char *get_index_file(void)
256{
257 if (!git_index_file)
258 setup_git_env();
259 return git_index_file;
260}
261
262char *get_graft_file(void)
263{
264 if (!git_graft_file)
265 setup_git_env();
266 return git_graft_file;
267}
d7ac12b2
JS
268
269int set_git_dir(const char *path)
270{
271 if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
272 return error("Could not set GIT_DIR to '%s'", path);
273 setup_git_env();
274 return 0;
275}
a6fa5992
PN
276
277const char *get_log_output_encoding(void)
278{
279 return git_log_output_encoding ? git_log_output_encoding
280 : get_commit_output_encoding();
281}
282
283const char *get_commit_output_encoding(void)
284{
285 return git_commit_encoding ? git_commit_encoding : "UTF-8";
286}