cache.h: drop LOCAL_REPO_ENV_SIZE
[git/git.git] / environment.c
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 #include "fmt-merge-msg.h"
13
14 int trust_executable_bit = 1;
15 int trust_ctime = 1;
16 int has_symlinks = 1;
17 int minimum_abbrev = 4, default_abbrev = 7;
18 int ignore_case;
19 int assume_unchanged;
20 int prefer_symlink_refs;
21 int is_bare_repository_cfg = -1; /* unspecified */
22 int log_all_ref_updates = -1; /* unspecified */
23 int warn_ambiguous_refs = 1;
24 int repository_format_version;
25 const char *git_commit_encoding;
26 const char *git_log_output_encoding;
27 int shared_repository = PERM_UMASK;
28 const char *apply_default_whitespace;
29 const char *apply_default_ignorewhitespace;
30 const char *git_attributes_file;
31 int zlib_compression_level = Z_BEST_SPEED;
32 int core_compression_level;
33 int core_compression_seen;
34 int fsync_object_files;
35 size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
36 size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
37 size_t delta_base_cache_limit = 16 * 1024 * 1024;
38 unsigned long big_file_threshold = 512 * 1024 * 1024;
39 const char *log_pack_access;
40 const char *pager_program;
41 int pager_use_color = 1;
42 const char *editor_program;
43 const char *askpass_program;
44 const char *excludes_file;
45 enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
46 int read_replace_refs = 1; /* NEEDSWORK: rename to use_replace_refs */
47 enum eol core_eol = EOL_UNSET;
48 enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
49 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
50 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
51 enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
52 enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
53 #ifndef OBJECT_CREATION_MODE
54 #define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
55 #endif
56 enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
57 char *notes_ref_name;
58 int grafts_replace_parents = 1;
59 int core_apply_sparse_checkout;
60 int merge_log_config = -1;
61 int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
62 struct startup_info *startup_info;
63 unsigned long pack_size_limit_cfg;
64
65 /* Parallel index stat data preload? */
66 int core_preload_index = 0;
67
68 /* This is set by setup_git_dir_gently() and/or git_default_config() */
69 char *git_work_tree_cfg;
70 static char *work_tree;
71
72 static const char *namespace;
73 static size_t namespace_len;
74
75 static const char *git_dir;
76 static char *git_object_dir, *git_index_file, *git_graft_file;
77
78 /*
79 * Repository-local GIT_* environment variables; see cache.h for details.
80 */
81 const char * const local_repo_env[] = {
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
94 static 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_refname_format(buf.buf, 0))
110 die("bad git namespace path \"%s\"", raw_namespace);
111 strbuf_addch(&buf, '/');
112 return strbuf_detach(&buf, NULL);
113 }
114
115 static 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
144 int 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
150 int have_git_dir(void)
151 {
152 return !!git_dir;
153 }
154
155 const char *get_git_dir(void)
156 {
157 if (!git_dir)
158 setup_git_env();
159 return git_dir;
160 }
161
162 const char *get_git_namespace(void)
163 {
164 if (!namespace)
165 setup_git_env();
166 return namespace;
167 }
168
169 const 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
176 static 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 */
183 void 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
197 const char *get_git_work_tree(void)
198 {
199 return work_tree;
200 }
201
202 char *get_object_directory(void)
203 {
204 if (!git_object_dir)
205 setup_git_env();
206 return git_object_dir;
207 }
208
209 int 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
231 int 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
246 char *get_index_file(void)
247 {
248 if (!git_index_file)
249 setup_git_env();
250 return git_index_file;
251 }
252
253 char *get_graft_file(void)
254 {
255 if (!git_graft_file)
256 setup_git_env();
257 return git_graft_file;
258 }
259
260 int 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
268 const char *get_log_output_encoding(void)
269 {
270 return git_log_output_encoding ? git_log_output_encoding
271 : get_commit_output_encoding();
272 }
273
274 const char *get_commit_output_encoding(void)
275 {
276 return git_commit_encoding ? git_commit_encoding : "UTF-8";
277 }