receive-pack: convert strncpy to xsnprintf
[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;
49672f26 27int ref_paranoia = -1;
96f1e58f 28int repository_format_version;
1a8f2741 29const char *git_commit_encoding;
3a55602e 30const char *git_log_output_encoding;
94df2506 31int shared_repository = PERM_UMASK;
96f1e58f 32const char *apply_default_whitespace;
86c91f91 33const char *apply_default_ignorewhitespace;
64589a03 34const char *git_attributes_file;
960ccca6
DH
35int zlib_compression_level = Z_BEST_SPEED;
36int core_compression_level;
37int core_compression_seen;
aafe9fba 38int fsync_object_files;
8c82534d
SP
39size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
40size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
4874f544 41size_t delta_base_cache_limit = 96 * 1024 * 1024;
15366280 42unsigned long big_file_threshold = 512 * 1024 * 1024;
872da32d 43const char *pager_program;
aa086eb8 44int pager_use_color = 1;
ee9601e6 45const char *editor_program;
d3e7da89 46const char *askpass_program;
dfb068be 47const char *excludes_file;
fd6cce9e 48enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
afc711b8 49int check_replace_refs = 1;
58d121b2 50char *git_replace_ref_base;
ec70f52f 51enum eol core_eol = EOL_UNSET;
21e5ad50 52enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
cf1b7869 53unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
9ed36cfa 54enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
c998ae9b 55enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
f25950f3 56enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
348df166
JS
57#ifndef OBJECT_CREATION_MODE
58#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
be66a6c4 59#endif
348df166 60enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
a97a7468 61char *notes_ref_name;
7f3140cd 62int grafts_replace_parents = 1;
08aefc9e 63int core_apply_sparse_checkout;
898eacd8 64int merge_log_config = -1;
76759c7d 65int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
e37c1329 66struct startup_info *startup_info;
568508e7 67unsigned long pack_size_limit_cfg;
e1b10391 68
a42643aa
JK
69#ifndef PROTECT_HFS_DEFAULT
70#define PROTECT_HFS_DEFAULT 0
71#endif
72int protect_hfs = PROTECT_HFS_DEFAULT;
73
2b4c6efc
JS
74#ifndef PROTECT_NTFS_DEFAULT
75#define PROTECT_NTFS_DEFAULT 0
76#endif
77int protect_ntfs = PROTECT_NTFS_DEFAULT;
78
eff80a9f
JH
79/*
80 * The character that begins a commented line in user-editable file
81 * that is subject to stripspace.
82 */
83char comment_line_char = '#';
84c9dc2c 84int auto_comment_line_char;
eff80a9f 85
671c9b7e 86/* Parallel index stat data preload? */
299e2987 87int core_preload_index = 1;
671c9b7e 88
e90fdc39
JS
89/* This is set by setup_git_dir_gently() and/or git_default_config() */
90char *git_work_tree_cfg;
19757d80 91static char *work_tree;
e90fdc39 92
a1bea2c1
JT
93static const char *namespace;
94static size_t namespace_len;
95
c7b3a3d2 96static const char *git_dir, *git_common_dir;
7f7868ea 97static char *git_object_dir, *git_index_file, *git_graft_file;
c7b3a3d2 98int git_db_env, git_index_env, git_graft_env, git_common_dir_env;
c5fba16c 99
48a7c1c4 100/*
2163e5db 101 * Repository-local GIT_* environment variables; see cache.h for details.
48a7c1c4 102 */
2163e5db 103const char * const local_repo_env[] = {
48a7c1c4
GB
104 ALTERNATE_DB_ENVIRONMENT,
105 CONFIG_ENVIRONMENT,
655e8d9c 106 CONFIG_DATA_ENVIRONMENT,
48a7c1c4
GB
107 DB_ENVIRONMENT,
108 GIT_DIR_ENVIRONMENT,
109 GIT_WORK_TREE_ENVIRONMENT,
2cd83d10 110 GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
48a7c1c4
GB
111 GRAFT_ENVIRONMENT,
112 INDEX_ENVIRONMENT,
113 NO_REPLACE_OBJECTS_ENVIRONMENT,
58d121b2 114 GIT_REPLACE_REF_BASE_ENVIRONMENT,
a6f7f9a3 115 GIT_PREFIX_ENVIRONMENT,
069c0532 116 GIT_SHALLOW_FILE_ENVIRONMENT,
c7b3a3d2 117 GIT_COMMON_DIR_ENVIRONMENT,
48a7c1c4
GB
118 NULL
119};
120
a1bea2c1
JT
121static char *expand_namespace(const char *raw_namespace)
122{
123 struct strbuf buf = STRBUF_INIT;
124 struct strbuf **components, **c;
125
126 if (!raw_namespace || !*raw_namespace)
127 return xstrdup("");
128
129 strbuf_addstr(&buf, raw_namespace);
130 components = strbuf_split(&buf, '/');
131 strbuf_reset(&buf);
132 for (c = components; *c; c++)
133 if (strcmp((*c)->buf, "/") != 0)
134 strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
135 strbuf_list_free(components);
8d9c5010 136 if (check_refname_format(buf.buf, 0))
a1bea2c1
JT
137 die("bad git namespace path \"%s\"", raw_namespace);
138 strbuf_addch(&buf, '/');
139 return strbuf_detach(&buf, NULL);
140}
141
c7b3a3d2
NTND
142static char *git_path_from_env(const char *envvar, const char *git_dir,
143 const char *path, int *fromenv)
cb6c38d5
JK
144{
145 const char *value = getenv(envvar);
557bd833
NTND
146 if (!value) {
147 char *buf = xmalloc(strlen(git_dir) + strlen(path) + 2);
148 sprintf(buf, "%s/%s", git_dir, path);
149 return buf;
150 }
151 if (fromenv)
152 *fromenv = 1;
153 return xstrdup(value);
cb6c38d5
JK
154}
155
e1b10391
LT
156static void setup_git_env(void)
157{
31e26ebc 158 struct strbuf sb = STRBUF_INIT;
487a2b73 159 const char *gitfile;
069c0532 160 const char *shallow_file;
58d121b2 161 const char *replace_ref_base;
487a2b73 162
e1b10391
LT
163 git_dir = getenv(GIT_DIR_ENVIRONMENT);
164 if (!git_dir)
165 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
487a2b73
NTND
166 gitfile = read_gitfile(git_dir);
167 git_dir = xstrdup(gitfile ? gitfile : git_dir);
31e26ebc 168 if (get_common_dir(&sb, git_dir))
c7b3a3d2 169 git_common_dir_env = 1;
31e26ebc 170 git_common_dir = strbuf_detach(&sb, NULL);
c7b3a3d2
NTND
171 git_object_dir = git_path_from_env(DB_ENVIRONMENT, git_common_dir,
172 "objects", &git_db_env);
173 git_index_file = git_path_from_env(INDEX_ENVIRONMENT, git_dir,
174 "index", &git_index_env);
175 git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, git_common_dir,
176 "info/grafts", &git_graft_env);
6476b38b 177 if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
afc711b8 178 check_replace_refs = 0;
58d121b2
MH
179 replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
180 git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
181 : "refs/replace/");
a1bea2c1
JT
182 namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
183 namespace_len = strlen(namespace);
069c0532
NTND
184 shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
185 if (shallow_file)
186 set_alternate_shallow_file(shallow_file, 0);
0bee5918
SP
187}
188
7d1864ce 189int is_bare_repository(void)
0bee5918 190{
e90fdc39
JS
191 /* if core.bare is not 'false', let's see if there is a work tree */
192 return is_bare_repository_cfg && !get_git_work_tree();
e1b10391
LT
193}
194
c5fba16c 195const char *get_git_dir(void)
e1b10391
LT
196{
197 if (!git_dir)
198 setup_git_env();
199 return git_dir;
200}
201
c7b3a3d2
NTND
202const char *get_git_common_dir(void)
203{
204 return git_common_dir;
205}
206
a1bea2c1
JT
207const char *get_git_namespace(void)
208{
209 if (!namespace)
210 setup_git_env();
211 return namespace;
212}
213
214const char *strip_namespace(const char *namespaced_ref)
215{
59556548 216 if (!starts_with(namespaced_ref, get_git_namespace()))
a1bea2c1
JT
217 return NULL;
218 return namespaced_ref + namespace_len;
219}
220
19757d80
DB
221static int git_work_tree_initialized;
222
223/*
224 * Note. This works only before you used a work tree. This was added
225 * primarily to support git-clone to work in a new repository it just
226 * created, and is not meant to flip between different work trees.
227 */
228void set_git_work_tree(const char *new_work_tree)
229{
83518360 230 if (git_work_tree_initialized) {
e2a57aac 231 new_work_tree = real_path(new_work_tree);
83518360
NTND
232 if (strcmp(new_work_tree, work_tree))
233 die("internal error: work tree has already been set\n"
234 "Current worktree: %s\nNew worktree: %s",
235 work_tree, new_work_tree);
236 return;
237 }
19757d80 238 git_work_tree_initialized = 1;
e2a57aac 239 work_tree = xstrdup(real_path(new_work_tree));
d95138e6
NTND
240 if (setenv(GIT_WORK_TREE_ENVIRONMENT, work_tree, 1))
241 die("could not set GIT_WORK_TREE to '%s'", work_tree);
19757d80
DB
242}
243
e90fdc39
JS
244const char *get_git_work_tree(void)
245{
e90fdc39
JS
246 return work_tree;
247}
248
e1b10391
LT
249char *get_object_directory(void)
250{
251 if (!git_object_dir)
252 setup_git_env();
253 return git_object_dir;
254}
255
463db9b1
JN
256int odb_mkstemp(char *template, size_t limit, const char *pattern)
257{
258 int fd;
259 /*
260 * we let the umask do its job, don't try to be more
261 * restrictive except to remove write permission.
262 */
263 int mode = 0444;
264 snprintf(template, limit, "%s/%s",
265 get_object_directory(), pattern);
266 fd = git_mkstemp_mode(template, mode);
267 if (0 <= fd)
268 return fd;
269
270 /* slow path */
271 /* some mkstemp implementations erase template on failure */
272 snprintf(template, limit, "%s/%s",
273 get_object_directory(), pattern);
274 safe_create_leading_directories(template);
275 return xmkstemp_mode(template, mode);
276}
277
8640d496 278int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1)
463db9b1
JN
279{
280 int fd;
281
282 snprintf(name, namesz, "%s/pack/pack-%s.keep",
283 get_object_directory(), sha1_to_hex(sha1));
284 fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
285 if (0 <= fd)
286 return fd;
287
288 /* slow path */
289 safe_create_leading_directories(name);
290 return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
291}
292
e1b10391
LT
293char *get_index_file(void)
294{
295 if (!git_index_file)
296 setup_git_env();
297 return git_index_file;
298}
299
300char *get_graft_file(void)
301{
302 if (!git_graft_file)
303 setup_git_env();
304 return git_graft_file;
305}
d7ac12b2
JS
306
307int set_git_dir(const char *path)
308{
309 if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
310 return error("Could not set GIT_DIR to '%s'", path);
311 setup_git_env();
312 return 0;
313}
a6fa5992
PN
314
315const char *get_log_output_encoding(void)
316{
317 return git_log_output_encoding ? git_log_output_encoding
318 : get_commit_output_encoding();
319}
320
321const char *get_commit_output_encoding(void)
322{
323 return git_commit_encoding ? git_commit_encoding : "UTF-8";
324}