receive/send-pack: support pushing from a shallow clone
[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"
e1b10391 13
e1b10391 14int trust_executable_bit = 1;
1ce4790b 15int trust_ctime = 1;
c08e4d5b 16int check_stat = 1;
78a8d641 17int has_symlinks = 1;
dce96489 18int minimum_abbrev = 4, default_abbrev = 7;
0a9b88b7 19int ignore_case;
96f1e58f
DR
20int assume_unchanged;
21int prefer_symlink_refs;
7d1864ce 22int is_bare_repository_cfg = -1; /* unspecified */
510c5a8e 23int log_all_ref_updates = -1; /* unspecified */
1b371f56 24int warn_ambiguous_refs = 1;
25fba78d 25int warn_on_object_refname_ambiguity = 1;
96f1e58f 26int repository_format_version;
1a8f2741 27const char *git_commit_encoding;
3a55602e 28const char *git_log_output_encoding;
94df2506 29int shared_repository = PERM_UMASK;
96f1e58f 30const char *apply_default_whitespace;
86c91f91 31const char *apply_default_ignorewhitespace;
64589a03 32const char *git_attributes_file;
960ccca6
DH
33int zlib_compression_level = Z_BEST_SPEED;
34int core_compression_level;
35int core_compression_seen;
aafe9fba 36int fsync_object_files;
8c82534d
SP
37size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
38size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
18bdec11 39size_t delta_base_cache_limit = 16 * 1024 * 1024;
15366280 40unsigned long big_file_threshold = 512 * 1024 * 1024;
872da32d 41const char *pager_program;
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;
e1111cef 47int read_replace_refs = 1; /* NEEDSWORK: rename to use_replace_refs */
ec70f52f 48enum eol core_eol = EOL_UNSET;
21e5ad50 49enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
cf1b7869 50unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
9ed36cfa 51enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
c998ae9b 52enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
f25950f3 53enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
348df166
JS
54#ifndef OBJECT_CREATION_MODE
55#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
be66a6c4 56#endif
348df166 57enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
a97a7468 58char *notes_ref_name;
7f3140cd 59int grafts_replace_parents = 1;
08aefc9e 60int core_apply_sparse_checkout;
898eacd8 61int merge_log_config = -1;
76759c7d 62int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
e37c1329 63struct startup_info *startup_info;
568508e7 64unsigned long pack_size_limit_cfg;
e1b10391 65
eff80a9f
JH
66/*
67 * The character that begins a commented line in user-editable file
68 * that is subject to stripspace.
69 */
70char comment_line_char = '#';
71
671c9b7e
LT
72/* Parallel index stat data preload? */
73int core_preload_index = 0;
74
e90fdc39
JS
75/* This is set by setup_git_dir_gently() and/or git_default_config() */
76char *git_work_tree_cfg;
19757d80 77static char *work_tree;
e90fdc39 78
a1bea2c1
JT
79static const char *namespace;
80static size_t namespace_len;
81
c5fba16c 82static const char *git_dir;
7f7868ea 83static char *git_object_dir, *git_index_file, *git_graft_file;
c5fba16c 84
48a7c1c4 85/*
2163e5db 86 * Repository-local GIT_* environment variables; see cache.h for details.
48a7c1c4 87 */
2163e5db 88const char * const local_repo_env[] = {
48a7c1c4
GB
89 ALTERNATE_DB_ENVIRONMENT,
90 CONFIG_ENVIRONMENT,
655e8d9c 91 CONFIG_DATA_ENVIRONMENT,
48a7c1c4
GB
92 DB_ENVIRONMENT,
93 GIT_DIR_ENVIRONMENT,
94 GIT_WORK_TREE_ENVIRONMENT,
2cd83d10 95 GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
48a7c1c4
GB
96 GRAFT_ENVIRONMENT,
97 INDEX_ENVIRONMENT,
98 NO_REPLACE_OBJECTS_ENVIRONMENT,
a6f7f9a3 99 GIT_PREFIX_ENVIRONMENT,
48a7c1c4
GB
100 NULL
101};
102
a1bea2c1
JT
103static char *expand_namespace(const char *raw_namespace)
104{
105 struct strbuf buf = STRBUF_INIT;
106 struct strbuf **components, **c;
107
108 if (!raw_namespace || !*raw_namespace)
109 return xstrdup("");
110
111 strbuf_addstr(&buf, raw_namespace);
112 components = strbuf_split(&buf, '/');
113 strbuf_reset(&buf);
114 for (c = components; *c; c++)
115 if (strcmp((*c)->buf, "/") != 0)
116 strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
117 strbuf_list_free(components);
8d9c5010 118 if (check_refname_format(buf.buf, 0))
a1bea2c1
JT
119 die("bad git namespace path \"%s\"", raw_namespace);
120 strbuf_addch(&buf, '/');
121 return strbuf_detach(&buf, NULL);
122}
123
e1b10391
LT
124static void setup_git_env(void)
125{
487a2b73
NTND
126 const char *gitfile;
127
e1b10391
LT
128 git_dir = getenv(GIT_DIR_ENVIRONMENT);
129 if (!git_dir)
130 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
487a2b73
NTND
131 gitfile = read_gitfile(git_dir);
132 git_dir = xstrdup(gitfile ? gitfile : git_dir);
e1b10391
LT
133 git_object_dir = getenv(DB_ENVIRONMENT);
134 if (!git_object_dir) {
135 git_object_dir = xmalloc(strlen(git_dir) + 9);
136 sprintf(git_object_dir, "%s/objects", git_dir);
137 }
e1b10391
LT
138 git_index_file = getenv(INDEX_ENVIRONMENT);
139 if (!git_index_file) {
140 git_index_file = xmalloc(strlen(git_dir) + 7);
141 sprintf(git_index_file, "%s/index", git_dir);
142 }
143 git_graft_file = getenv(GRAFT_ENVIRONMENT);
144 if (!git_graft_file)
a4f34cbb 145 git_graft_file = git_pathdup("info/grafts");
6476b38b
CC
146 if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
147 read_replace_refs = 0;
a1bea2c1
JT
148 namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
149 namespace_len = strlen(namespace);
0bee5918
SP
150}
151
7d1864ce 152int is_bare_repository(void)
0bee5918 153{
e90fdc39
JS
154 /* if core.bare is not 'false', let's see if there is a work tree */
155 return is_bare_repository_cfg && !get_git_work_tree();
e1b10391
LT
156}
157
c5fba16c 158const char *get_git_dir(void)
e1b10391
LT
159{
160 if (!git_dir)
161 setup_git_env();
162 return git_dir;
163}
164
a1bea2c1
JT
165const char *get_git_namespace(void)
166{
167 if (!namespace)
168 setup_git_env();
169 return namespace;
170}
171
172const char *strip_namespace(const char *namespaced_ref)
173{
174 if (prefixcmp(namespaced_ref, get_git_namespace()) != 0)
175 return NULL;
176 return namespaced_ref + namespace_len;
177}
178
19757d80
DB
179static int git_work_tree_initialized;
180
181/*
182 * Note. This works only before you used a work tree. This was added
183 * primarily to support git-clone to work in a new repository it just
184 * created, and is not meant to flip between different work trees.
185 */
186void set_git_work_tree(const char *new_work_tree)
187{
83518360 188 if (git_work_tree_initialized) {
e2a57aac 189 new_work_tree = real_path(new_work_tree);
83518360
NTND
190 if (strcmp(new_work_tree, work_tree))
191 die("internal error: work tree has already been set\n"
192 "Current worktree: %s\nNew worktree: %s",
193 work_tree, new_work_tree);
194 return;
195 }
19757d80 196 git_work_tree_initialized = 1;
e2a57aac 197 work_tree = xstrdup(real_path(new_work_tree));
19757d80
DB
198}
199
e90fdc39
JS
200const char *get_git_work_tree(void)
201{
e90fdc39
JS
202 return work_tree;
203}
204
e1b10391
LT
205char *get_object_directory(void)
206{
207 if (!git_object_dir)
208 setup_git_env();
209 return git_object_dir;
210}
211
463db9b1
JN
212int odb_mkstemp(char *template, size_t limit, const char *pattern)
213{
214 int fd;
215 /*
216 * we let the umask do its job, don't try to be more
217 * restrictive except to remove write permission.
218 */
219 int mode = 0444;
220 snprintf(template, limit, "%s/%s",
221 get_object_directory(), pattern);
222 fd = git_mkstemp_mode(template, mode);
223 if (0 <= fd)
224 return fd;
225
226 /* slow path */
227 /* some mkstemp implementations erase template on failure */
228 snprintf(template, limit, "%s/%s",
229 get_object_directory(), pattern);
230 safe_create_leading_directories(template);
231 return xmkstemp_mode(template, mode);
232}
233
234int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1)
235{
236 int fd;
237
238 snprintf(name, namesz, "%s/pack/pack-%s.keep",
239 get_object_directory(), sha1_to_hex(sha1));
240 fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
241 if (0 <= fd)
242 return fd;
243
244 /* slow path */
245 safe_create_leading_directories(name);
246 return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
247}
248
e1b10391
LT
249char *get_index_file(void)
250{
251 if (!git_index_file)
252 setup_git_env();
253 return git_index_file;
254}
255
256char *get_graft_file(void)
257{
258 if (!git_graft_file)
259 setup_git_env();
260 return git_graft_file;
261}
d7ac12b2
JS
262
263int set_git_dir(const char *path)
264{
265 if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
266 return error("Could not set GIT_DIR to '%s'", path);
267 setup_git_env();
268 return 0;
269}
a6fa5992
PN
270
271const char *get_log_output_encoding(void)
272{
273 return git_log_output_encoding ? git_log_output_encoding
274 : get_commit_output_encoding();
275}
276
277const char *get_commit_output_encoding(void)
278{
279 return git_commit_encoding ? git_commit_encoding : "UTF-8";
280}