odb_mkstemp: write filename into strbuf
[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;
e6c587c7 19int minimum_abbrev = 4, default_abbrev = -1;
0a9b88b7 20int ignore_case;
96f1e58f
DR
21int assume_unchanged;
22int prefer_symlink_refs;
7d1864ce 23int is_bare_repository_cfg = -1; /* unspecified */
1b371f56 24int warn_ambiguous_refs = 1;
25fba78d 25int warn_on_object_refname_ambiguity = 1;
49672f26 26int ref_paranoia = -1;
067fbd41 27int repository_format_precious_objects;
1a8f2741 28const char *git_commit_encoding;
3a55602e 29const char *git_log_output_encoding;
96f1e58f 30const char *apply_default_whitespace;
86c91f91 31const char *apply_default_ignorewhitespace;
64589a03 32const char *git_attributes_file;
867ad08a 33const char *git_hooks_path;
960ccca6
DH
34int zlib_compression_level = Z_BEST_SPEED;
35int core_compression_level;
8de7eeb5 36int pack_compression_level = Z_DEFAULT_COMPRESSION;
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;
4874f544 40size_t delta_base_cache_limit = 96 * 1024 * 1024;
15366280 41unsigned long big_file_threshold = 512 * 1024 * 1024;
aa086eb8 42int pager_use_color = 1;
ee9601e6 43const char *editor_program;
d3e7da89 44const char *askpass_program;
dfb068be 45const char *excludes_file;
fd6cce9e 46enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
afc711b8 47int check_replace_refs = 1;
58d121b2 48char *git_replace_ref_base;
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() */
568508e7 64unsigned long pack_size_limit_cfg;
f30afdab 65enum hide_dotfiles_type hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
341fb286 66enum log_refs_config log_all_ref_updates = LOG_REFS_UNSET;
e1b10391 67
a42643aa
JK
68#ifndef PROTECT_HFS_DEFAULT
69#define PROTECT_HFS_DEFAULT 0
70#endif
71int protect_hfs = PROTECT_HFS_DEFAULT;
72
2b4c6efc
JS
73#ifndef PROTECT_NTFS_DEFAULT
74#define PROTECT_NTFS_DEFAULT 0
75#endif
76int protect_ntfs = PROTECT_NTFS_DEFAULT;
77
eff80a9f
JH
78/*
79 * The character that begins a commented line in user-editable file
80 * that is subject to stripspace.
81 */
82char comment_line_char = '#';
84c9dc2c 83int auto_comment_line_char;
eff80a9f 84
671c9b7e 85/* Parallel index stat data preload? */
299e2987 86int core_preload_index = 1;
671c9b7e 87
dae6c322
CC
88/*
89 * This is a hack for test programs like test-dump-untracked-cache to
90 * ensure that they do not modify the untracked cache when reading it.
91 * Do not use it otherwise!
92 */
93int ignore_untracked_cache_config;
94
e90fdc39
JS
95/* This is set by setup_git_dir_gently() and/or git_default_config() */
96char *git_work_tree_cfg;
19757d80 97static char *work_tree;
e90fdc39 98
a1bea2c1
JT
99static const char *namespace;
100static size_t namespace_len;
101
74866d75
BW
102static const char *super_prefix;
103
c7b3a3d2 104static const char *git_dir, *git_common_dir;
7f7868ea 105static char *git_object_dir, *git_index_file, *git_graft_file;
c7b3a3d2 106int git_db_env, git_index_env, git_graft_env, git_common_dir_env;
c5fba16c 107
48a7c1c4 108/*
2163e5db 109 * Repository-local GIT_* environment variables; see cache.h for details.
48a7c1c4 110 */
2163e5db 111const char * const local_repo_env[] = {
48a7c1c4
GB
112 ALTERNATE_DB_ENVIRONMENT,
113 CONFIG_ENVIRONMENT,
655e8d9c 114 CONFIG_DATA_ENVIRONMENT,
48a7c1c4
GB
115 DB_ENVIRONMENT,
116 GIT_DIR_ENVIRONMENT,
117 GIT_WORK_TREE_ENVIRONMENT,
2cd83d10 118 GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
48a7c1c4
GB
119 GRAFT_ENVIRONMENT,
120 INDEX_ENVIRONMENT,
121 NO_REPLACE_OBJECTS_ENVIRONMENT,
58d121b2 122 GIT_REPLACE_REF_BASE_ENVIRONMENT,
a6f7f9a3 123 GIT_PREFIX_ENVIRONMENT,
74866d75 124 GIT_SUPER_PREFIX_ENVIRONMENT,
069c0532 125 GIT_SHALLOW_FILE_ENVIRONMENT,
c7b3a3d2 126 GIT_COMMON_DIR_ENVIRONMENT,
48a7c1c4
GB
127 NULL
128};
129
a1bea2c1
JT
130static char *expand_namespace(const char *raw_namespace)
131{
132 struct strbuf buf = STRBUF_INIT;
133 struct strbuf **components, **c;
134
135 if (!raw_namespace || !*raw_namespace)
136 return xstrdup("");
137
138 strbuf_addstr(&buf, raw_namespace);
139 components = strbuf_split(&buf, '/');
140 strbuf_reset(&buf);
141 for (c = components; *c; c++)
142 if (strcmp((*c)->buf, "/") != 0)
143 strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
144 strbuf_list_free(components);
8d9c5010 145 if (check_refname_format(buf.buf, 0))
a1bea2c1
JT
146 die("bad git namespace path \"%s\"", raw_namespace);
147 strbuf_addch(&buf, '/');
148 return strbuf_detach(&buf, NULL);
149}
150
c7b3a3d2
NTND
151static char *git_path_from_env(const char *envvar, const char *git_dir,
152 const char *path, int *fromenv)
cb6c38d5
JK
153{
154 const char *value = getenv(envvar);
75faa45a
JK
155 if (!value)
156 return xstrfmt("%s/%s", git_dir, path);
557bd833
NTND
157 if (fromenv)
158 *fromenv = 1;
159 return xstrdup(value);
cb6c38d5
JK
160}
161
e1b10391
LT
162static void setup_git_env(void)
163{
31e26ebc 164 struct strbuf sb = STRBUF_INIT;
487a2b73 165 const char *gitfile;
069c0532 166 const char *shallow_file;
58d121b2 167 const char *replace_ref_base;
487a2b73 168
e1b10391
LT
169 git_dir = getenv(GIT_DIR_ENVIRONMENT);
170 if (!git_dir)
171 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
487a2b73
NTND
172 gitfile = read_gitfile(git_dir);
173 git_dir = xstrdup(gitfile ? gitfile : git_dir);
31e26ebc 174 if (get_common_dir(&sb, git_dir))
c7b3a3d2 175 git_common_dir_env = 1;
31e26ebc 176 git_common_dir = strbuf_detach(&sb, NULL);
c7b3a3d2
NTND
177 git_object_dir = git_path_from_env(DB_ENVIRONMENT, git_common_dir,
178 "objects", &git_db_env);
179 git_index_file = git_path_from_env(INDEX_ENVIRONMENT, git_dir,
180 "index", &git_index_env);
181 git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, git_common_dir,
182 "info/grafts", &git_graft_env);
6476b38b 183 if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
afc711b8 184 check_replace_refs = 0;
58d121b2
MH
185 replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
186 git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
187 : "refs/replace/");
a1bea2c1
JT
188 namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
189 namespace_len = strlen(namespace);
069c0532
NTND
190 shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
191 if (shallow_file)
192 set_alternate_shallow_file(shallow_file, 0);
0bee5918
SP
193}
194
7d1864ce 195int is_bare_repository(void)
0bee5918 196{
e90fdc39
JS
197 /* if core.bare is not 'false', let's see if there is a work tree */
198 return is_bare_repository_cfg && !get_git_work_tree();
e1b10391
LT
199}
200
b9605bc4
JK
201int have_git_dir(void)
202{
203 return startup_info->have_repository
204 || git_dir
205 || getenv(GIT_DIR_ENVIRONMENT);
206}
207
c5fba16c 208const char *get_git_dir(void)
e1b10391
LT
209{
210 if (!git_dir)
211 setup_git_env();
212 return git_dir;
213}
214
c7b3a3d2
NTND
215const char *get_git_common_dir(void)
216{
217 return git_common_dir;
218}
219
a1bea2c1
JT
220const char *get_git_namespace(void)
221{
222 if (!namespace)
223 setup_git_env();
224 return namespace;
225}
226
227const char *strip_namespace(const char *namespaced_ref)
228{
59556548 229 if (!starts_with(namespaced_ref, get_git_namespace()))
a1bea2c1
JT
230 return NULL;
231 return namespaced_ref + namespace_len;
232}
233
74866d75
BW
234const char *get_super_prefix(void)
235{
236 static int initialized;
237 if (!initialized) {
238 super_prefix = getenv(GIT_SUPER_PREFIX_ENVIRONMENT);
239 initialized = 1;
240 }
241 return super_prefix;
242}
243
19757d80
DB
244static int git_work_tree_initialized;
245
246/*
247 * Note. This works only before you used a work tree. This was added
248 * primarily to support git-clone to work in a new repository it just
249 * created, and is not meant to flip between different work trees.
250 */
251void set_git_work_tree(const char *new_work_tree)
252{
83518360 253 if (git_work_tree_initialized) {
e2a57aac 254 new_work_tree = real_path(new_work_tree);
83518360
NTND
255 if (strcmp(new_work_tree, work_tree))
256 die("internal error: work tree has already been set\n"
257 "Current worktree: %s\nNew worktree: %s",
258 work_tree, new_work_tree);
259 return;
260 }
19757d80 261 git_work_tree_initialized = 1;
ce83eadd 262 work_tree = real_pathdup(new_work_tree, 1);
19757d80
DB
263}
264
e90fdc39
JS
265const char *get_git_work_tree(void)
266{
e90fdc39
JS
267 return work_tree;
268}
269
e1b10391
LT
270char *get_object_directory(void)
271{
272 if (!git_object_dir)
273 setup_git_env();
274 return git_object_dir;
275}
276
594fa999 277int odb_mkstemp(struct strbuf *template, const char *pattern)
463db9b1
JN
278{
279 int fd;
280 /*
281 * we let the umask do its job, don't try to be more
282 * restrictive except to remove write permission.
283 */
284 int mode = 0444;
594fa999
JK
285 strbuf_reset(template);
286 strbuf_addf(template, "%s/%s", get_object_directory(), pattern);
287 fd = git_mkstemp_mode(template->buf, mode);
463db9b1
JN
288 if (0 <= fd)
289 return fd;
290
291 /* slow path */
292 /* some mkstemp implementations erase template on failure */
594fa999
JK
293 strbuf_reset(template);
294 strbuf_addf(template, "%s/%s", get_object_directory(), pattern);
295 safe_create_leading_directories(template->buf);
296 return xmkstemp_mode(template->buf, mode);
463db9b1
JN
297}
298
eaeefc32 299int odb_pack_keep(const char *name)
463db9b1
JN
300{
301 int fd;
302
463db9b1
JN
303 fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
304 if (0 <= fd)
305 return fd;
306
307 /* slow path */
eaeefc32 308 safe_create_leading_directories_const(name);
463db9b1
JN
309 return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
310}
311
e1b10391
LT
312char *get_index_file(void)
313{
314 if (!git_index_file)
315 setup_git_env();
316 return git_index_file;
317}
318
319char *get_graft_file(void)
320{
321 if (!git_graft_file)
322 setup_git_env();
323 return git_graft_file;
324}
d7ac12b2
JS
325
326int set_git_dir(const char *path)
327{
328 if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
329 return error("Could not set GIT_DIR to '%s'", path);
330 setup_git_env();
331 return 0;
332}
a6fa5992
PN
333
334const char *get_log_output_encoding(void)
335{
336 return git_log_output_encoding ? git_log_output_encoding
337 : get_commit_output_encoding();
338}
339
340const char *get_commit_output_encoding(void)
341{
342 return git_commit_encoding ? git_commit_encoding : "UTF-8";
343}
7875acb6
JK
344
345static int the_shared_repository = PERM_UMASK;
ae5f6776 346static int need_shared_repository_from_config = 1;
7875acb6
JK
347
348void set_shared_repository(int value)
349{
350 the_shared_repository = value;
ae5f6776 351 need_shared_repository_from_config = 0;
7875acb6
JK
352}
353
354int get_shared_repository(void)
355{
ae5f6776
JK
356 if (need_shared_repository_from_config) {
357 const char *var = "core.sharedrepository";
358 const char *value;
359 if (!git_config_get_value(var, &value))
360 the_shared_repository = git_config_perm(var, value);
361 need_shared_repository_from_config = 0;
362 }
7875acb6
JK
363 return the_shared_repository;
364}
4543926b
JK
365
366void reset_shared_repository(void)
367{
368 need_shared_repository_from_config = 1;
369}