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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 | #include "commit.h" | |
14 | ||
15 | int trust_executable_bit = 1; | |
16 | int trust_ctime = 1; | |
17 | int check_stat = 1; | |
18 | int has_symlinks = 1; | |
19 | int minimum_abbrev = 4, default_abbrev = 7; | |
20 | int ignore_case; | |
21 | int assume_unchanged; | |
22 | int prefer_symlink_refs; | |
23 | int is_bare_repository_cfg = -1; /* unspecified */ | |
24 | int log_all_ref_updates = -1; /* unspecified */ | |
25 | int warn_ambiguous_refs = 1; | |
26 | int warn_on_object_refname_ambiguity = 1; | |
27 | int ref_paranoia = -1; | |
28 | int repository_format_version; | |
29 | const char *git_commit_encoding; | |
30 | const char *git_log_output_encoding; | |
31 | int shared_repository = PERM_UMASK; | |
32 | const char *apply_default_whitespace; | |
33 | const char *apply_default_ignorewhitespace; | |
34 | const char *git_attributes_file; | |
35 | int zlib_compression_level = Z_BEST_SPEED; | |
36 | int core_compression_level; | |
37 | int core_compression_seen; | |
38 | int fsync_object_files; | |
39 | size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE; | |
40 | size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT; | |
41 | size_t delta_base_cache_limit = 96 * 1024 * 1024; | |
42 | unsigned long big_file_threshold = 512 * 1024 * 1024; | |
43 | const char *pager_program; | |
44 | int pager_use_color = 1; | |
45 | const char *editor_program; | |
46 | const char *askpass_program; | |
47 | const char *excludes_file; | |
48 | enum auto_crlf auto_crlf = AUTO_CRLF_FALSE; | |
49 | int check_replace_refs = 1; | |
50 | enum eol core_eol = EOL_UNSET; | |
51 | enum safe_crlf safe_crlf = SAFE_CRLF_WARN; | |
52 | unsigned whitespace_rule_cfg = WS_DEFAULT_RULE; | |
53 | enum branch_track git_branch_track = BRANCH_TRACK_REMOTE; | |
54 | enum rebase_setup_type autorebase = AUTOREBASE_NEVER; | |
55 | enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED; | |
56 | #ifndef OBJECT_CREATION_MODE | |
57 | #define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS | |
58 | #endif | |
59 | enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE; | |
60 | char *notes_ref_name; | |
61 | int grafts_replace_parents = 1; | |
62 | int core_apply_sparse_checkout; | |
63 | int merge_log_config = -1; | |
64 | int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */ | |
65 | struct startup_info *startup_info; | |
66 | unsigned long pack_size_limit_cfg; | |
67 | ||
68 | #ifndef PROTECT_HFS_DEFAULT | |
69 | #define PROTECT_HFS_DEFAULT 0 | |
70 | #endif | |
71 | int protect_hfs = PROTECT_HFS_DEFAULT; | |
72 | ||
73 | #ifndef PROTECT_NTFS_DEFAULT | |
74 | #define PROTECT_NTFS_DEFAULT 0 | |
75 | #endif | |
76 | int protect_ntfs = PROTECT_NTFS_DEFAULT; | |
77 | ||
78 | /* | |
79 | * The character that begins a commented line in user-editable file | |
80 | * that is subject to stripspace. | |
81 | */ | |
82 | char comment_line_char = '#'; | |
83 | int auto_comment_line_char; | |
84 | ||
85 | /* Parallel index stat data preload? */ | |
86 | int core_preload_index = 1; | |
87 | ||
88 | /* This is set by setup_git_dir_gently() and/or git_default_config() */ | |
89 | char *git_work_tree_cfg; | |
90 | static char *work_tree; | |
91 | ||
92 | static const char *namespace; | |
93 | static size_t namespace_len; | |
94 | ||
95 | static const char *git_dir, *git_common_dir; | |
96 | static char *git_object_dir, *git_index_file, *git_graft_file; | |
97 | int git_db_env, git_index_env, git_graft_env, git_common_dir_env; | |
98 | ||
99 | /* | |
100 | * Repository-local GIT_* environment variables; see cache.h for details. | |
101 | */ | |
102 | const char * const local_repo_env[] = { | |
103 | ALTERNATE_DB_ENVIRONMENT, | |
104 | CONFIG_ENVIRONMENT, | |
105 | CONFIG_DATA_ENVIRONMENT, | |
106 | DB_ENVIRONMENT, | |
107 | GIT_DIR_ENVIRONMENT, | |
108 | GIT_WORK_TREE_ENVIRONMENT, | |
109 | GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, | |
110 | GRAFT_ENVIRONMENT, | |
111 | INDEX_ENVIRONMENT, | |
112 | NO_REPLACE_OBJECTS_ENVIRONMENT, | |
113 | GIT_PREFIX_ENVIRONMENT, | |
114 | GIT_SHALLOW_FILE_ENVIRONMENT, | |
115 | GIT_COMMON_DIR_ENVIRONMENT, | |
116 | NULL | |
117 | }; | |
118 | ||
119 | static char *expand_namespace(const char *raw_namespace) | |
120 | { | |
121 | struct strbuf buf = STRBUF_INIT; | |
122 | struct strbuf **components, **c; | |
123 | ||
124 | if (!raw_namespace || !*raw_namespace) | |
125 | return xstrdup(""); | |
126 | ||
127 | strbuf_addstr(&buf, raw_namespace); | |
128 | components = strbuf_split(&buf, '/'); | |
129 | strbuf_reset(&buf); | |
130 | for (c = components; *c; c++) | |
131 | if (strcmp((*c)->buf, "/") != 0) | |
132 | strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf); | |
133 | strbuf_list_free(components); | |
134 | if (check_refname_format(buf.buf, 0)) | |
135 | die("bad git namespace path \"%s\"", raw_namespace); | |
136 | strbuf_addch(&buf, '/'); | |
137 | return strbuf_detach(&buf, NULL); | |
138 | } | |
139 | ||
140 | static char *git_path_from_env(const char *envvar, const char *git_dir, | |
141 | const char *path, int *fromenv) | |
142 | { | |
143 | const char *value = getenv(envvar); | |
144 | if (!value) { | |
145 | char *buf = xmalloc(strlen(git_dir) + strlen(path) + 2); | |
146 | sprintf(buf, "%s/%s", git_dir, path); | |
147 | return buf; | |
148 | } | |
149 | if (fromenv) | |
150 | *fromenv = 1; | |
151 | return xstrdup(value); | |
152 | } | |
153 | ||
154 | static void setup_git_env(void) | |
155 | { | |
156 | struct strbuf sb = STRBUF_INIT; | |
157 | const char *gitfile; | |
158 | const char *shallow_file; | |
159 | ||
160 | git_dir = getenv(GIT_DIR_ENVIRONMENT); | |
161 | if (!git_dir) | |
162 | git_dir = DEFAULT_GIT_DIR_ENVIRONMENT; | |
163 | gitfile = read_gitfile(git_dir); | |
164 | git_dir = xstrdup(gitfile ? gitfile : git_dir); | |
165 | if (get_common_dir(&sb, git_dir)) | |
166 | git_common_dir_env = 1; | |
167 | git_common_dir = strbuf_detach(&sb, NULL); | |
168 | git_object_dir = git_path_from_env(DB_ENVIRONMENT, git_common_dir, | |
169 | "objects", &git_db_env); | |
170 | git_index_file = git_path_from_env(INDEX_ENVIRONMENT, git_dir, | |
171 | "index", &git_index_env); | |
172 | git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, git_common_dir, | |
173 | "info/grafts", &git_graft_env); | |
174 | if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT)) | |
175 | check_replace_refs = 0; | |
176 | namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT)); | |
177 | namespace_len = strlen(namespace); | |
178 | shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT); | |
179 | if (shallow_file) | |
180 | set_alternate_shallow_file(shallow_file, 0); | |
181 | } | |
182 | ||
183 | int is_bare_repository(void) | |
184 | { | |
185 | /* if core.bare is not 'false', let's see if there is a work tree */ | |
186 | return is_bare_repository_cfg && !get_git_work_tree(); | |
187 | } | |
188 | ||
189 | const char *get_git_dir(void) | |
190 | { | |
191 | if (!git_dir) | |
192 | setup_git_env(); | |
193 | return git_dir; | |
194 | } | |
195 | ||
196 | const char *get_git_common_dir(void) | |
197 | { | |
198 | return git_common_dir; | |
199 | } | |
200 | ||
201 | const char *get_git_namespace(void) | |
202 | { | |
203 | if (!namespace) | |
204 | setup_git_env(); | |
205 | return namespace; | |
206 | } | |
207 | ||
208 | const char *strip_namespace(const char *namespaced_ref) | |
209 | { | |
210 | if (!starts_with(namespaced_ref, get_git_namespace())) | |
211 | return NULL; | |
212 | return namespaced_ref + namespace_len; | |
213 | } | |
214 | ||
215 | static int git_work_tree_initialized; | |
216 | ||
217 | /* | |
218 | * Note. This works only before you used a work tree. This was added | |
219 | * primarily to support git-clone to work in a new repository it just | |
220 | * created, and is not meant to flip between different work trees. | |
221 | */ | |
222 | void set_git_work_tree(const char *new_work_tree) | |
223 | { | |
224 | if (git_work_tree_initialized) { | |
225 | new_work_tree = real_path(new_work_tree); | |
226 | if (strcmp(new_work_tree, work_tree)) | |
227 | die("internal error: work tree has already been set\n" | |
228 | "Current worktree: %s\nNew worktree: %s", | |
229 | work_tree, new_work_tree); | |
230 | return; | |
231 | } | |
232 | git_work_tree_initialized = 1; | |
233 | work_tree = xstrdup(real_path(new_work_tree)); | |
234 | } | |
235 | ||
236 | const char *get_git_work_tree(void) | |
237 | { | |
238 | return work_tree; | |
239 | } | |
240 | ||
241 | char *get_object_directory(void) | |
242 | { | |
243 | if (!git_object_dir) | |
244 | setup_git_env(); | |
245 | return git_object_dir; | |
246 | } | |
247 | ||
248 | int odb_mkstemp(char *template, size_t limit, const char *pattern) | |
249 | { | |
250 | int fd; | |
251 | /* | |
252 | * we let the umask do its job, don't try to be more | |
253 | * restrictive except to remove write permission. | |
254 | */ | |
255 | int mode = 0444; | |
256 | snprintf(template, limit, "%s/%s", | |
257 | get_object_directory(), pattern); | |
258 | fd = git_mkstemp_mode(template, mode); | |
259 | if (0 <= fd) | |
260 | return fd; | |
261 | ||
262 | /* slow path */ | |
263 | /* some mkstemp implementations erase template on failure */ | |
264 | snprintf(template, limit, "%s/%s", | |
265 | get_object_directory(), pattern); | |
266 | safe_create_leading_directories(template); | |
267 | return xmkstemp_mode(template, mode); | |
268 | } | |
269 | ||
270 | int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1) | |
271 | { | |
272 | int fd; | |
273 | ||
274 | snprintf(name, namesz, "%s/pack/pack-%s.keep", | |
275 | get_object_directory(), sha1_to_hex(sha1)); | |
276 | fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600); | |
277 | if (0 <= fd) | |
278 | return fd; | |
279 | ||
280 | /* slow path */ | |
281 | safe_create_leading_directories(name); | |
282 | return open(name, O_RDWR|O_CREAT|O_EXCL, 0600); | |
283 | } | |
284 | ||
285 | char *get_index_file(void) | |
286 | { | |
287 | if (!git_index_file) | |
288 | setup_git_env(); | |
289 | return git_index_file; | |
290 | } | |
291 | ||
292 | char *get_graft_file(void) | |
293 | { | |
294 | if (!git_graft_file) | |
295 | setup_git_env(); | |
296 | return git_graft_file; | |
297 | } | |
298 | ||
299 | int set_git_dir(const char *path) | |
300 | { | |
301 | if (setenv(GIT_DIR_ENVIRONMENT, path, 1)) | |
302 | return error("Could not set GIT_DIR to '%s'", path); | |
303 | setup_git_env(); | |
304 | return 0; | |
305 | } | |
306 | ||
307 | const char *get_log_output_encoding(void) | |
308 | { | |
309 | return git_log_output_encoding ? git_log_output_encoding | |
310 | : get_commit_output_encoding(); | |
311 | } | |
312 | ||
313 | const char *get_commit_output_encoding(void) | |
314 | { | |
315 | return git_commit_encoding ? git_commit_encoding : "UTF-8"; | |
316 | } |