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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 "environment.h" | |
13 | #include "repository.h" | |
14 | #include "config.h" | |
15 | #include "refs.h" | |
16 | #include "fmt-merge-msg.h" | |
17 | #include "commit.h" | |
18 | #include "strvec.h" | |
19 | #include "object-store.h" | |
20 | #include "replace-object.h" | |
21 | #include "tmp-objdir.h" | |
22 | #include "chdir-notify.h" | |
23 | #include "shallow.h" | |
24 | ||
25 | int trust_executable_bit = 1; | |
26 | int trust_ctime = 1; | |
27 | int check_stat = 1; | |
28 | int has_symlinks = 1; | |
29 | int minimum_abbrev = 4, default_abbrev = -1; | |
30 | int ignore_case; | |
31 | int assume_unchanged; | |
32 | int prefer_symlink_refs; | |
33 | int is_bare_repository_cfg = -1; /* unspecified */ | |
34 | int warn_ambiguous_refs = 1; | |
35 | int warn_on_object_refname_ambiguity = 1; | |
36 | int repository_format_precious_objects; | |
37 | int repository_format_worktree_config; | |
38 | const char *git_commit_encoding; | |
39 | const char *git_log_output_encoding; | |
40 | char *apply_default_whitespace; | |
41 | char *apply_default_ignorewhitespace; | |
42 | const char *git_attributes_file; | |
43 | const char *git_hooks_path; | |
44 | int zlib_compression_level = Z_BEST_SPEED; | |
45 | int pack_compression_level = Z_DEFAULT_COMPRESSION; | |
46 | int fsync_object_files = -1; | |
47 | int use_fsync = -1; | |
48 | enum fsync_method fsync_method = FSYNC_METHOD_DEFAULT; | |
49 | enum fsync_component fsync_components = FSYNC_COMPONENTS_DEFAULT; | |
50 | size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE; | |
51 | size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT; | |
52 | size_t delta_base_cache_limit = 96 * 1024 * 1024; | |
53 | unsigned long big_file_threshold = 512 * 1024 * 1024; | |
54 | int pager_use_color = 1; | |
55 | const char *editor_program; | |
56 | const char *askpass_program; | |
57 | const char *excludes_file; | |
58 | enum auto_crlf auto_crlf = AUTO_CRLF_FALSE; | |
59 | int read_replace_refs = 1; | |
60 | enum eol core_eol = EOL_UNSET; | |
61 | int global_conv_flags_eol = CONV_EOL_RNDTRP_WARN; | |
62 | char *check_roundtrip_encoding = "SHIFT-JIS"; | |
63 | unsigned whitespace_rule_cfg = WS_DEFAULT_RULE; | |
64 | enum branch_track git_branch_track = BRANCH_TRACK_REMOTE; | |
65 | enum rebase_setup_type autorebase = AUTOREBASE_NEVER; | |
66 | enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED; | |
67 | #ifndef OBJECT_CREATION_MODE | |
68 | #define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS | |
69 | #endif | |
70 | enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE; | |
71 | char *notes_ref_name; | |
72 | int grafts_replace_parents = 1; | |
73 | int core_apply_sparse_checkout; | |
74 | int core_sparse_checkout_cone; | |
75 | int sparse_expect_files_outside_of_patterns; | |
76 | int merge_log_config = -1; | |
77 | int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */ | |
78 | unsigned long pack_size_limit_cfg; | |
79 | enum log_refs_config log_all_ref_updates = LOG_REFS_UNSET; | |
80 | ||
81 | #ifndef PROTECT_HFS_DEFAULT | |
82 | #define PROTECT_HFS_DEFAULT 0 | |
83 | #endif | |
84 | int protect_hfs = PROTECT_HFS_DEFAULT; | |
85 | ||
86 | #ifndef PROTECT_NTFS_DEFAULT | |
87 | #define PROTECT_NTFS_DEFAULT 1 | |
88 | #endif | |
89 | int protect_ntfs = PROTECT_NTFS_DEFAULT; | |
90 | ||
91 | /* | |
92 | * The character that begins a commented line in user-editable file | |
93 | * that is subject to stripspace. | |
94 | */ | |
95 | char comment_line_char = '#'; | |
96 | int auto_comment_line_char; | |
97 | ||
98 | /* Parallel index stat data preload? */ | |
99 | int core_preload_index = 1; | |
100 | ||
101 | /* This is set by setup_git_dir_gently() and/or git_default_config() */ | |
102 | char *git_work_tree_cfg; | |
103 | ||
104 | static char *git_namespace; | |
105 | ||
106 | /* | |
107 | * Repository-local GIT_* environment variables; see cache.h for details. | |
108 | */ | |
109 | const char * const local_repo_env[] = { | |
110 | ALTERNATE_DB_ENVIRONMENT, | |
111 | CONFIG_ENVIRONMENT, | |
112 | CONFIG_DATA_ENVIRONMENT, | |
113 | CONFIG_COUNT_ENVIRONMENT, | |
114 | DB_ENVIRONMENT, | |
115 | GIT_DIR_ENVIRONMENT, | |
116 | GIT_WORK_TREE_ENVIRONMENT, | |
117 | GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, | |
118 | GRAFT_ENVIRONMENT, | |
119 | INDEX_ENVIRONMENT, | |
120 | NO_REPLACE_OBJECTS_ENVIRONMENT, | |
121 | GIT_REPLACE_REF_BASE_ENVIRONMENT, | |
122 | GIT_PREFIX_ENVIRONMENT, | |
123 | GIT_SHALLOW_FILE_ENVIRONMENT, | |
124 | GIT_COMMON_DIR_ENVIRONMENT, | |
125 | NULL | |
126 | }; | |
127 | ||
128 | static char *expand_namespace(const char *raw_namespace) | |
129 | { | |
130 | struct strbuf buf = STRBUF_INIT; | |
131 | struct strbuf **components, **c; | |
132 | ||
133 | if (!raw_namespace || !*raw_namespace) | |
134 | return xstrdup(""); | |
135 | ||
136 | strbuf_addstr(&buf, raw_namespace); | |
137 | components = strbuf_split(&buf, '/'); | |
138 | strbuf_reset(&buf); | |
139 | for (c = components; *c; c++) | |
140 | if (strcmp((*c)->buf, "/") != 0) | |
141 | strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf); | |
142 | strbuf_list_free(components); | |
143 | if (check_refname_format(buf.buf, 0)) | |
144 | die(_("bad git namespace path \"%s\""), raw_namespace); | |
145 | strbuf_addch(&buf, '/'); | |
146 | return strbuf_detach(&buf, NULL); | |
147 | } | |
148 | ||
149 | const char *getenv_safe(struct strvec *argv, const char *name) | |
150 | { | |
151 | const char *value = getenv(name); | |
152 | ||
153 | if (!value) | |
154 | return NULL; | |
155 | ||
156 | strvec_push(argv, value); | |
157 | return argv->v[argv->nr - 1]; | |
158 | } | |
159 | ||
160 | void setup_git_env(const char *git_dir) | |
161 | { | |
162 | char *git_replace_ref_base; | |
163 | const char *shallow_file; | |
164 | const char *replace_ref_base; | |
165 | struct set_gitdir_args args = { NULL }; | |
166 | struct strvec to_free = STRVEC_INIT; | |
167 | ||
168 | args.commondir = getenv_safe(&to_free, GIT_COMMON_DIR_ENVIRONMENT); | |
169 | args.object_dir = getenv_safe(&to_free, DB_ENVIRONMENT); | |
170 | args.graft_file = getenv_safe(&to_free, GRAFT_ENVIRONMENT); | |
171 | args.index_file = getenv_safe(&to_free, INDEX_ENVIRONMENT); | |
172 | args.alternate_db = getenv_safe(&to_free, ALTERNATE_DB_ENVIRONMENT); | |
173 | if (getenv(GIT_QUARANTINE_ENVIRONMENT)) { | |
174 | args.disable_ref_updates = 1; | |
175 | } | |
176 | ||
177 | repo_set_gitdir(the_repository, git_dir, &args); | |
178 | strvec_clear(&to_free); | |
179 | ||
180 | if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT)) | |
181 | read_replace_refs = 0; | |
182 | replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT); | |
183 | git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base | |
184 | : "refs/replace/"); | |
185 | update_ref_namespace(NAMESPACE_REPLACE, git_replace_ref_base); | |
186 | ||
187 | free(git_namespace); | |
188 | git_namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT)); | |
189 | shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT); | |
190 | if (shallow_file) | |
191 | set_alternate_shallow_file(the_repository, shallow_file, 0); | |
192 | } | |
193 | ||
194 | int is_bare_repository(void) | |
195 | { | |
196 | /* if core.bare is not 'false', let's see if there is a work tree */ | |
197 | return is_bare_repository_cfg && !get_git_work_tree(); | |
198 | } | |
199 | ||
200 | int have_git_dir(void) | |
201 | { | |
202 | return startup_info->have_repository | |
203 | || the_repository->gitdir; | |
204 | } | |
205 | ||
206 | const char *get_git_dir(void) | |
207 | { | |
208 | if (!the_repository->gitdir) | |
209 | BUG("git environment hasn't been setup"); | |
210 | return the_repository->gitdir; | |
211 | } | |
212 | ||
213 | const char *get_git_common_dir(void) | |
214 | { | |
215 | if (!the_repository->commondir) | |
216 | BUG("git environment hasn't been setup"); | |
217 | return the_repository->commondir; | |
218 | } | |
219 | ||
220 | const char *get_git_namespace(void) | |
221 | { | |
222 | if (!git_namespace) | |
223 | BUG("git environment hasn't been setup"); | |
224 | return git_namespace; | |
225 | } | |
226 | ||
227 | const char *strip_namespace(const char *namespaced_ref) | |
228 | { | |
229 | const char *out; | |
230 | if (skip_prefix(namespaced_ref, get_git_namespace(), &out)) | |
231 | return out; | |
232 | return NULL; | |
233 | } | |
234 | ||
235 | static int git_work_tree_initialized; | |
236 | ||
237 | /* | |
238 | * Note. This works only before you used a work tree. This was added | |
239 | * primarily to support git-clone to work in a new repository it just | |
240 | * created, and is not meant to flip between different work trees. | |
241 | */ | |
242 | void set_git_work_tree(const char *new_work_tree) | |
243 | { | |
244 | if (git_work_tree_initialized) { | |
245 | struct strbuf realpath = STRBUF_INIT; | |
246 | ||
247 | strbuf_realpath(&realpath, new_work_tree, 1); | |
248 | new_work_tree = realpath.buf; | |
249 | if (strcmp(new_work_tree, the_repository->worktree)) | |
250 | die("internal error: work tree has already been set\n" | |
251 | "Current worktree: %s\nNew worktree: %s", | |
252 | the_repository->worktree, new_work_tree); | |
253 | strbuf_release(&realpath); | |
254 | return; | |
255 | } | |
256 | git_work_tree_initialized = 1; | |
257 | repo_set_worktree(the_repository, new_work_tree); | |
258 | } | |
259 | ||
260 | const char *get_git_work_tree(void) | |
261 | { | |
262 | return the_repository->worktree; | |
263 | } | |
264 | ||
265 | const char *get_object_directory(void) | |
266 | { | |
267 | if (!the_repository->objects->odb) | |
268 | BUG("git environment hasn't been setup"); | |
269 | return the_repository->objects->odb->path; | |
270 | } | |
271 | ||
272 | int odb_mkstemp(struct strbuf *temp_filename, const char *pattern) | |
273 | { | |
274 | int fd; | |
275 | /* | |
276 | * we let the umask do its job, don't try to be more | |
277 | * restrictive except to remove write permission. | |
278 | */ | |
279 | int mode = 0444; | |
280 | git_path_buf(temp_filename, "objects/%s", pattern); | |
281 | fd = git_mkstemp_mode(temp_filename->buf, mode); | |
282 | if (0 <= fd) | |
283 | return fd; | |
284 | ||
285 | /* slow path */ | |
286 | /* some mkstemp implementations erase temp_filename on failure */ | |
287 | git_path_buf(temp_filename, "objects/%s", pattern); | |
288 | safe_create_leading_directories(temp_filename->buf); | |
289 | return xmkstemp_mode(temp_filename->buf, mode); | |
290 | } | |
291 | ||
292 | int odb_pack_keep(const char *name) | |
293 | { | |
294 | int fd; | |
295 | ||
296 | fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600); | |
297 | if (0 <= fd) | |
298 | return fd; | |
299 | ||
300 | /* slow path */ | |
301 | safe_create_leading_directories_const(name); | |
302 | return open(name, O_RDWR|O_CREAT|O_EXCL, 0600); | |
303 | } | |
304 | ||
305 | char *get_index_file(void) | |
306 | { | |
307 | if (!the_repository->index_file) | |
308 | BUG("git environment hasn't been setup"); | |
309 | return the_repository->index_file; | |
310 | } | |
311 | ||
312 | char *get_graft_file(struct repository *r) | |
313 | { | |
314 | if (!r->graft_file) | |
315 | BUG("git environment hasn't been setup"); | |
316 | return r->graft_file; | |
317 | } | |
318 | ||
319 | static void set_git_dir_1(const char *path) | |
320 | { | |
321 | xsetenv(GIT_DIR_ENVIRONMENT, path, 1); | |
322 | setup_git_env(path); | |
323 | } | |
324 | ||
325 | static void update_relative_gitdir(const char *name UNUSED, | |
326 | const char *old_cwd, | |
327 | const char *new_cwd, | |
328 | void *data UNUSED) | |
329 | { | |
330 | char *path = reparent_relative_path(old_cwd, new_cwd, get_git_dir()); | |
331 | struct tmp_objdir *tmp_objdir = tmp_objdir_unapply_primary_odb(); | |
332 | ||
333 | trace_printf_key(&trace_setup_key, | |
334 | "setup: move $GIT_DIR to '%s'", | |
335 | path); | |
336 | set_git_dir_1(path); | |
337 | if (tmp_objdir) | |
338 | tmp_objdir_reapply_primary_odb(tmp_objdir, old_cwd, new_cwd); | |
339 | free(path); | |
340 | } | |
341 | ||
342 | void set_git_dir(const char *path, int make_realpath) | |
343 | { | |
344 | struct strbuf realpath = STRBUF_INIT; | |
345 | ||
346 | if (make_realpath) { | |
347 | strbuf_realpath(&realpath, path, 1); | |
348 | path = realpath.buf; | |
349 | } | |
350 | ||
351 | set_git_dir_1(path); | |
352 | if (!is_absolute_path(path)) | |
353 | chdir_notify_register(NULL, update_relative_gitdir, NULL); | |
354 | ||
355 | strbuf_release(&realpath); | |
356 | } | |
357 | ||
358 | const char *get_log_output_encoding(void) | |
359 | { | |
360 | return git_log_output_encoding ? git_log_output_encoding | |
361 | : get_commit_output_encoding(); | |
362 | } | |
363 | ||
364 | const char *get_commit_output_encoding(void) | |
365 | { | |
366 | return git_commit_encoding ? git_commit_encoding : "UTF-8"; | |
367 | } | |
368 | ||
369 | static int the_shared_repository = PERM_UMASK; | |
370 | static int need_shared_repository_from_config = 1; | |
371 | ||
372 | void set_shared_repository(int value) | |
373 | { | |
374 | the_shared_repository = value; | |
375 | need_shared_repository_from_config = 0; | |
376 | } | |
377 | ||
378 | int get_shared_repository(void) | |
379 | { | |
380 | if (need_shared_repository_from_config) { | |
381 | const char *var = "core.sharedrepository"; | |
382 | const char *value; | |
383 | if (!git_config_get_value(var, &value)) | |
384 | the_shared_repository = git_config_perm(var, value); | |
385 | need_shared_repository_from_config = 0; | |
386 | } | |
387 | return the_shared_repository; | |
388 | } | |
389 | ||
390 | void reset_shared_repository(void) | |
391 | { | |
392 | need_shared_repository_from_config = 1; | |
393 | } | |
394 | ||
395 | int use_optional_locks(void) | |
396 | { | |
397 | return git_env_bool(GIT_OPTIONAL_LOCKS_ENVIRONMENT, 1); | |
398 | } | |
399 | ||
400 | int print_sha1_ellipsis(void) | |
401 | { | |
402 | /* | |
403 | * Determine if the calling environment contains the variable | |
404 | * GIT_PRINT_SHA1_ELLIPSIS set to "yes". | |
405 | */ | |
406 | static int cached_result = -1; /* unknown */ | |
407 | ||
408 | if (cached_result < 0) { | |
409 | const char *v = getenv("GIT_PRINT_SHA1_ELLIPSIS"); | |
410 | cached_result = (v && !strcasecmp(v, "yes")); | |
411 | } | |
412 | return cached_result; | |
413 | } |