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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 "branch.h" | |
12 | #include "repository.h" | |
13 | #include "config.h" | |
14 | #include "refs.h" | |
15 | #include "fmt-merge-msg.h" | |
16 | #include "commit.h" | |
17 | #include "argv-array.h" | |
18 | #include "object-store.h" | |
19 | #include "chdir-notify.h" | |
20 | ||
21 | int trust_executable_bit = 1; | |
22 | int trust_ctime = 1; | |
23 | int check_stat = 1; | |
24 | int has_symlinks = 1; | |
25 | int minimum_abbrev = 4, default_abbrev = -1; | |
26 | int ignore_case; | |
27 | int assume_unchanged; | |
28 | int prefer_symlink_refs; | |
29 | int is_bare_repository_cfg = -1; /* unspecified */ | |
30 | int warn_ambiguous_refs = 1; | |
31 | int warn_on_object_refname_ambiguity = 1; | |
32 | int ref_paranoia = -1; | |
33 | int repository_format_precious_objects; | |
34 | int repository_format_worktree_config; | |
35 | const char *git_commit_encoding; | |
36 | const char *git_log_output_encoding; | |
37 | const char *apply_default_whitespace; | |
38 | const char *apply_default_ignorewhitespace; | |
39 | const char *git_attributes_file; | |
40 | const char *git_hooks_path; | |
41 | int zlib_compression_level = Z_BEST_SPEED; | |
42 | int core_compression_level; | |
43 | int pack_compression_level = Z_DEFAULT_COMPRESSION; | |
44 | int fsync_object_files; | |
45 | size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE; | |
46 | size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT; | |
47 | size_t delta_base_cache_limit = 96 * 1024 * 1024; | |
48 | unsigned long big_file_threshold = 512 * 1024 * 1024; | |
49 | int pager_use_color = 1; | |
50 | const char *editor_program; | |
51 | const char *askpass_program; | |
52 | const char *excludes_file; | |
53 | enum auto_crlf auto_crlf = AUTO_CRLF_FALSE; | |
54 | int read_replace_refs = 1; | |
55 | char *git_replace_ref_base; | |
56 | enum eol core_eol = EOL_UNSET; | |
57 | int global_conv_flags_eol = CONV_EOL_RNDTRP_WARN; | |
58 | char *check_roundtrip_encoding = "SHIFT-JIS"; | |
59 | unsigned whitespace_rule_cfg = WS_DEFAULT_RULE; | |
60 | enum branch_track git_branch_track = BRANCH_TRACK_REMOTE; | |
61 | enum rebase_setup_type autorebase = AUTOREBASE_NEVER; | |
62 | enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED; | |
63 | #ifndef OBJECT_CREATION_MODE | |
64 | #define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS | |
65 | #endif | |
66 | enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE; | |
67 | char *notes_ref_name; | |
68 | int grafts_replace_parents = 1; | |
69 | int core_apply_sparse_checkout; | |
70 | int core_sparse_checkout_cone; | |
71 | int merge_log_config = -1; | |
72 | int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */ | |
73 | unsigned long pack_size_limit_cfg; | |
74 | enum log_refs_config log_all_ref_updates = LOG_REFS_UNSET; | |
75 | ||
76 | #ifndef PROTECT_HFS_DEFAULT | |
77 | #define PROTECT_HFS_DEFAULT 0 | |
78 | #endif | |
79 | int protect_hfs = PROTECT_HFS_DEFAULT; | |
80 | ||
81 | #ifndef PROTECT_NTFS_DEFAULT | |
82 | #define PROTECT_NTFS_DEFAULT 1 | |
83 | #endif | |
84 | int protect_ntfs = PROTECT_NTFS_DEFAULT; | |
85 | const char *core_fsmonitor; | |
86 | ||
87 | /* | |
88 | * The character that begins a commented line in user-editable file | |
89 | * that is subject to stripspace. | |
90 | */ | |
91 | char comment_line_char = '#'; | |
92 | int auto_comment_line_char; | |
93 | ||
94 | /* Parallel index stat data preload? */ | |
95 | int core_preload_index = 1; | |
96 | ||
97 | /* | |
98 | * This is a hack for test programs like test-dump-untracked-cache to | |
99 | * ensure that they do not modify the untracked cache when reading it. | |
100 | * Do not use it otherwise! | |
101 | */ | |
102 | int ignore_untracked_cache_config; | |
103 | ||
104 | /* This is set by setup_git_dir_gently() and/or git_default_config() */ | |
105 | char *git_work_tree_cfg; | |
106 | ||
107 | static char *git_namespace; | |
108 | ||
109 | static char *super_prefix; | |
110 | ||
111 | /* | |
112 | * Repository-local GIT_* environment variables; see cache.h for details. | |
113 | */ | |
114 | const char * const local_repo_env[] = { | |
115 | ALTERNATE_DB_ENVIRONMENT, | |
116 | CONFIG_ENVIRONMENT, | |
117 | CONFIG_DATA_ENVIRONMENT, | |
118 | DB_ENVIRONMENT, | |
119 | GIT_DIR_ENVIRONMENT, | |
120 | GIT_WORK_TREE_ENVIRONMENT, | |
121 | GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, | |
122 | GRAFT_ENVIRONMENT, | |
123 | INDEX_ENVIRONMENT, | |
124 | NO_REPLACE_OBJECTS_ENVIRONMENT, | |
125 | GIT_REPLACE_REF_BASE_ENVIRONMENT, | |
126 | GIT_PREFIX_ENVIRONMENT, | |
127 | GIT_SUPER_PREFIX_ENVIRONMENT, | |
128 | GIT_SHALLOW_FILE_ENVIRONMENT, | |
129 | GIT_COMMON_DIR_ENVIRONMENT, | |
130 | NULL | |
131 | }; | |
132 | ||
133 | static char *expand_namespace(const char *raw_namespace) | |
134 | { | |
135 | struct strbuf buf = STRBUF_INIT; | |
136 | struct strbuf **components, **c; | |
137 | ||
138 | if (!raw_namespace || !*raw_namespace) | |
139 | return xstrdup(""); | |
140 | ||
141 | strbuf_addstr(&buf, raw_namespace); | |
142 | components = strbuf_split(&buf, '/'); | |
143 | strbuf_reset(&buf); | |
144 | for (c = components; *c; c++) | |
145 | if (strcmp((*c)->buf, "/") != 0) | |
146 | strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf); | |
147 | strbuf_list_free(components); | |
148 | if (check_refname_format(buf.buf, 0)) | |
149 | die(_("bad git namespace path \"%s\""), raw_namespace); | |
150 | strbuf_addch(&buf, '/'); | |
151 | return strbuf_detach(&buf, NULL); | |
152 | } | |
153 | ||
154 | /* | |
155 | * Wrapper of getenv() that returns a strdup value. This value is kept | |
156 | * in argv to be freed later. | |
157 | */ | |
158 | static const char *getenv_safe(struct argv_array *argv, const char *name) | |
159 | { | |
160 | const char *value = getenv(name); | |
161 | ||
162 | if (!value) | |
163 | return NULL; | |
164 | ||
165 | argv_array_push(argv, value); | |
166 | return argv->argv[argv->argc - 1]; | |
167 | } | |
168 | ||
169 | void setup_git_env(const char *git_dir) | |
170 | { | |
171 | const char *shallow_file; | |
172 | const char *replace_ref_base; | |
173 | struct set_gitdir_args args = { NULL }; | |
174 | struct argv_array to_free = ARGV_ARRAY_INIT; | |
175 | ||
176 | args.commondir = getenv_safe(&to_free, GIT_COMMON_DIR_ENVIRONMENT); | |
177 | args.object_dir = getenv_safe(&to_free, DB_ENVIRONMENT); | |
178 | args.graft_file = getenv_safe(&to_free, GRAFT_ENVIRONMENT); | |
179 | args.index_file = getenv_safe(&to_free, INDEX_ENVIRONMENT); | |
180 | args.alternate_db = getenv_safe(&to_free, ALTERNATE_DB_ENVIRONMENT); | |
181 | repo_set_gitdir(the_repository, git_dir, &args); | |
182 | argv_array_clear(&to_free); | |
183 | ||
184 | if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT)) | |
185 | read_replace_refs = 0; | |
186 | replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT); | |
187 | free(git_replace_ref_base); | |
188 | git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base | |
189 | : "refs/replace/"); | |
190 | free(git_namespace); | |
191 | git_namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT)); | |
192 | shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT); | |
193 | if (shallow_file) | |
194 | set_alternate_shallow_file(the_repository, shallow_file, 0); | |
195 | } | |
196 | ||
197 | int is_bare_repository(void) | |
198 | { | |
199 | /* if core.bare is not 'false', let's see if there is a work tree */ | |
200 | return is_bare_repository_cfg && !get_git_work_tree(); | |
201 | } | |
202 | ||
203 | int have_git_dir(void) | |
204 | { | |
205 | return startup_info->have_repository | |
206 | || the_repository->gitdir; | |
207 | } | |
208 | ||
209 | const char *get_git_dir(void) | |
210 | { | |
211 | if (!the_repository->gitdir) | |
212 | BUG("git environment hasn't been setup"); | |
213 | return the_repository->gitdir; | |
214 | } | |
215 | ||
216 | const char *get_git_common_dir(void) | |
217 | { | |
218 | if (!the_repository->commondir) | |
219 | BUG("git environment hasn't been setup"); | |
220 | return the_repository->commondir; | |
221 | } | |
222 | ||
223 | const char *get_git_namespace(void) | |
224 | { | |
225 | if (!git_namespace) | |
226 | BUG("git environment hasn't been setup"); | |
227 | return git_namespace; | |
228 | } | |
229 | ||
230 | const char *strip_namespace(const char *namespaced_ref) | |
231 | { | |
232 | const char *out; | |
233 | if (skip_prefix(namespaced_ref, get_git_namespace(), &out)) | |
234 | return out; | |
235 | return NULL; | |
236 | } | |
237 | ||
238 | const char *get_super_prefix(void) | |
239 | { | |
240 | static int initialized; | |
241 | if (!initialized) { | |
242 | super_prefix = xstrdup_or_null(getenv(GIT_SUPER_PREFIX_ENVIRONMENT)); | |
243 | initialized = 1; | |
244 | } | |
245 | return super_prefix; | |
246 | } | |
247 | ||
248 | static int git_work_tree_initialized; | |
249 | ||
250 | /* | |
251 | * Note. This works only before you used a work tree. This was added | |
252 | * primarily to support git-clone to work in a new repository it just | |
253 | * created, and is not meant to flip between different work trees. | |
254 | */ | |
255 | void set_git_work_tree(const char *new_work_tree) | |
256 | { | |
257 | if (git_work_tree_initialized) { | |
258 | new_work_tree = real_path(new_work_tree); | |
259 | if (strcmp(new_work_tree, the_repository->worktree)) | |
260 | die("internal error: work tree has already been set\n" | |
261 | "Current worktree: %s\nNew worktree: %s", | |
262 | the_repository->worktree, new_work_tree); | |
263 | return; | |
264 | } | |
265 | git_work_tree_initialized = 1; | |
266 | repo_set_worktree(the_repository, new_work_tree); | |
267 | } | |
268 | ||
269 | const char *get_git_work_tree(void) | |
270 | { | |
271 | return the_repository->worktree; | |
272 | } | |
273 | ||
274 | char *get_object_directory(void) | |
275 | { | |
276 | if (!the_repository->objects->odb) | |
277 | BUG("git environment hasn't been setup"); | |
278 | return the_repository->objects->odb->path; | |
279 | } | |
280 | ||
281 | int odb_mkstemp(struct strbuf *temp_filename, const char *pattern) | |
282 | { | |
283 | int fd; | |
284 | /* | |
285 | * we let the umask do its job, don't try to be more | |
286 | * restrictive except to remove write permission. | |
287 | */ | |
288 | int mode = 0444; | |
289 | git_path_buf(temp_filename, "objects/%s", pattern); | |
290 | fd = git_mkstemp_mode(temp_filename->buf, mode); | |
291 | if (0 <= fd) | |
292 | return fd; | |
293 | ||
294 | /* slow path */ | |
295 | /* some mkstemp implementations erase temp_filename on failure */ | |
296 | git_path_buf(temp_filename, "objects/%s", pattern); | |
297 | safe_create_leading_directories(temp_filename->buf); | |
298 | return xmkstemp_mode(temp_filename->buf, mode); | |
299 | } | |
300 | ||
301 | int odb_pack_keep(const char *name) | |
302 | { | |
303 | int fd; | |
304 | ||
305 | fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600); | |
306 | if (0 <= fd) | |
307 | return fd; | |
308 | ||
309 | /* slow path */ | |
310 | safe_create_leading_directories_const(name); | |
311 | return open(name, O_RDWR|O_CREAT|O_EXCL, 0600); | |
312 | } | |
313 | ||
314 | char *get_index_file(void) | |
315 | { | |
316 | if (!the_repository->index_file) | |
317 | BUG("git environment hasn't been setup"); | |
318 | return the_repository->index_file; | |
319 | } | |
320 | ||
321 | char *get_graft_file(struct repository *r) | |
322 | { | |
323 | if (!r->graft_file) | |
324 | BUG("git environment hasn't been setup"); | |
325 | return r->graft_file; | |
326 | } | |
327 | ||
328 | static void set_git_dir_1(const char *path) | |
329 | { | |
330 | if (setenv(GIT_DIR_ENVIRONMENT, path, 1)) | |
331 | die(_("could not set GIT_DIR to '%s'"), path); | |
332 | setup_git_env(path); | |
333 | } | |
334 | ||
335 | static void update_relative_gitdir(const char *name, | |
336 | const char *old_cwd, | |
337 | const char *new_cwd, | |
338 | void *data) | |
339 | { | |
340 | char *path = reparent_relative_path(old_cwd, new_cwd, get_git_dir()); | |
341 | trace_printf_key(&trace_setup_key, | |
342 | "setup: move $GIT_DIR to '%s'", | |
343 | path); | |
344 | set_git_dir_1(path); | |
345 | free(path); | |
346 | } | |
347 | ||
348 | void set_git_dir(const char *path) | |
349 | { | |
350 | set_git_dir_1(path); | |
351 | if (!is_absolute_path(path)) | |
352 | chdir_notify_register(NULL, update_relative_gitdir, NULL); | |
353 | } | |
354 | ||
355 | const char *get_log_output_encoding(void) | |
356 | { | |
357 | return git_log_output_encoding ? git_log_output_encoding | |
358 | : get_commit_output_encoding(); | |
359 | } | |
360 | ||
361 | const char *get_commit_output_encoding(void) | |
362 | { | |
363 | return git_commit_encoding ? git_commit_encoding : "UTF-8"; | |
364 | } | |
365 | ||
366 | static int the_shared_repository = PERM_UMASK; | |
367 | static int need_shared_repository_from_config = 1; | |
368 | ||
369 | void set_shared_repository(int value) | |
370 | { | |
371 | the_shared_repository = value; | |
372 | need_shared_repository_from_config = 0; | |
373 | } | |
374 | ||
375 | int get_shared_repository(void) | |
376 | { | |
377 | if (need_shared_repository_from_config) { | |
378 | const char *var = "core.sharedrepository"; | |
379 | const char *value; | |
380 | if (!git_config_get_value(var, &value)) | |
381 | the_shared_repository = git_config_perm(var, value); | |
382 | need_shared_repository_from_config = 0; | |
383 | } | |
384 | return the_shared_repository; | |
385 | } | |
386 | ||
387 | void reset_shared_repository(void) | |
388 | { | |
389 | need_shared_repository_from_config = 1; | |
390 | } | |
391 | ||
392 | int use_optional_locks(void) | |
393 | { | |
394 | return git_env_bool(GIT_OPTIONAL_LOCKS_ENVIRONMENT, 1); | |
395 | } | |
396 | ||
397 | int print_sha1_ellipsis(void) | |
398 | { | |
399 | /* | |
400 | * Determine if the calling environment contains the variable | |
401 | * GIT_PRINT_SHA1_ELLIPSIS set to "yes". | |
402 | */ | |
403 | static int cached_result = -1; /* unknown */ | |
404 | ||
405 | if (cached_result < 0) { | |
406 | const char *v = getenv("GIT_PRINT_SHA1_ELLIPSIS"); | |
407 | cached_result = (v && !strcasecmp(v, "yes")); | |
408 | } | |
409 | return cached_result; | |
410 | } |