sha1_file.c: move delayed getenv(altdb) back to setup_git_env()
[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 "repository.h"
12 #include "config.h"
13 #include "refs.h"
14 #include "fmt-merge-msg.h"
15 #include "commit.h"
16 #include "argv-array.h"
17
18 int trust_executable_bit = 1;
19 int trust_ctime = 1;
20 int check_stat = 1;
21 int has_symlinks = 1;
22 int minimum_abbrev = 4, default_abbrev = -1;
23 int ignore_case;
24 int assume_unchanged;
25 int prefer_symlink_refs;
26 int is_bare_repository_cfg = -1; /* unspecified */
27 int warn_ambiguous_refs = 1;
28 int warn_on_object_refname_ambiguity = 1;
29 int ref_paranoia = -1;
30 int repository_format_precious_objects;
31 char *repository_format_partial_clone;
32 const char *core_partial_clone_filter_default;
33 const char *git_commit_encoding;
34 const char *git_log_output_encoding;
35 const char *apply_default_whitespace;
36 const char *apply_default_ignorewhitespace;
37 const char *git_attributes_file;
38 const char *git_hooks_path;
39 int zlib_compression_level = Z_BEST_SPEED;
40 int core_compression_level;
41 int pack_compression_level = Z_DEFAULT_COMPRESSION;
42 int fsync_object_files;
43 size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
44 size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
45 size_t delta_base_cache_limit = 96 * 1024 * 1024;
46 unsigned long big_file_threshold = 512 * 1024 * 1024;
47 int pager_use_color = 1;
48 const char *editor_program;
49 const char *askpass_program;
50 const char *excludes_file;
51 enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
52 int check_replace_refs = 1;
53 char *git_replace_ref_base;
54 enum eol core_eol = EOL_UNSET;
55 int global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
56 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
57 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
58 enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
59 enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
60 #ifndef OBJECT_CREATION_MODE
61 #define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
62 #endif
63 enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
64 char *notes_ref_name;
65 int grafts_replace_parents = 1;
66 int core_apply_sparse_checkout;
67 int merge_log_config = -1;
68 int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
69 unsigned long pack_size_limit_cfg;
70 enum hide_dotfiles_type hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
71 enum log_refs_config log_all_ref_updates = LOG_REFS_UNSET;
72
73 #ifndef PROTECT_HFS_DEFAULT
74 #define PROTECT_HFS_DEFAULT 0
75 #endif
76 int protect_hfs = PROTECT_HFS_DEFAULT;
77
78 #ifndef PROTECT_NTFS_DEFAULT
79 #define PROTECT_NTFS_DEFAULT 0
80 #endif
81 int protect_ntfs = PROTECT_NTFS_DEFAULT;
82 const char *core_fsmonitor;
83
84 /*
85 * The character that begins a commented line in user-editable file
86 * that is subject to stripspace.
87 */
88 char comment_line_char = '#';
89 int auto_comment_line_char;
90
91 /* Parallel index stat data preload? */
92 int core_preload_index = 1;
93
94 /*
95 * This is a hack for test programs like test-dump-untracked-cache to
96 * ensure that they do not modify the untracked cache when reading it.
97 * Do not use it otherwise!
98 */
99 int ignore_untracked_cache_config;
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 *namespace;
105
106 static const char *super_prefix;
107
108 /*
109 * Repository-local GIT_* environment variables; see cache.h for details.
110 */
111 const char * const local_repo_env[] = {
112 ALTERNATE_DB_ENVIRONMENT,
113 CONFIG_ENVIRONMENT,
114 CONFIG_DATA_ENVIRONMENT,
115 DB_ENVIRONMENT,
116 GIT_DIR_ENVIRONMENT,
117 GIT_WORK_TREE_ENVIRONMENT,
118 GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
119 GRAFT_ENVIRONMENT,
120 INDEX_ENVIRONMENT,
121 NO_REPLACE_OBJECTS_ENVIRONMENT,
122 GIT_REPLACE_REF_BASE_ENVIRONMENT,
123 GIT_PREFIX_ENVIRONMENT,
124 GIT_SUPER_PREFIX_ENVIRONMENT,
125 GIT_SHALLOW_FILE_ENVIRONMENT,
126 GIT_COMMON_DIR_ENVIRONMENT,
127 NULL
128 };
129
130 static char *expand_namespace(const char *raw_namespace)
131 {
132 struct strbuf buf = STRBUF_INIT;
133 struct strbuf **components, **c;
134
135 if (!raw_namespace || !*raw_namespace)
136 return xstrdup("");
137
138 strbuf_addstr(&buf, raw_namespace);
139 components = strbuf_split(&buf, '/');
140 strbuf_reset(&buf);
141 for (c = components; *c; c++)
142 if (strcmp((*c)->buf, "/") != 0)
143 strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
144 strbuf_list_free(components);
145 if (check_refname_format(buf.buf, 0))
146 die("bad git namespace path \"%s\"", raw_namespace);
147 strbuf_addch(&buf, '/');
148 return strbuf_detach(&buf, NULL);
149 }
150
151 /*
152 * Wrapper of getenv() that returns a strdup value. This value is kept
153 * in argv to be freed later.
154 */
155 static const char *getenv_safe(struct argv_array *argv, const char *name)
156 {
157 const char *value = getenv(name);
158
159 if (!value)
160 return NULL;
161
162 argv_array_push(argv, value);
163 return argv->argv[argv->argc - 1];
164 }
165
166 void setup_git_env(const char *git_dir)
167 {
168 const char *shallow_file;
169 const char *replace_ref_base;
170 struct set_gitdir_args args = { NULL };
171 struct argv_array to_free = ARGV_ARRAY_INIT;
172
173 args.commondir = getenv_safe(&to_free, GIT_COMMON_DIR_ENVIRONMENT);
174 args.object_dir = getenv_safe(&to_free, DB_ENVIRONMENT);
175 args.graft_file = getenv_safe(&to_free, GRAFT_ENVIRONMENT);
176 args.index_file = getenv_safe(&to_free, INDEX_ENVIRONMENT);
177 args.alternate_db = getenv_safe(&to_free, ALTERNATE_DB_ENVIRONMENT);
178 repo_set_gitdir(the_repository, git_dir, &args);
179 argv_array_clear(&to_free);
180
181 if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
182 check_replace_refs = 0;
183 replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
184 free(git_replace_ref_base);
185 git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
186 : "refs/replace/");
187 free(namespace);
188 namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
189 shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
190 if (shallow_file)
191 set_alternate_shallow_file(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 (!namespace)
223 BUG("git environment hasn't been setup");
224 return 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 const char *get_super_prefix(void)
236 {
237 static int initialized;
238 if (!initialized) {
239 super_prefix = getenv(GIT_SUPER_PREFIX_ENVIRONMENT);
240 initialized = 1;
241 }
242 return super_prefix;
243 }
244
245 static int git_work_tree_initialized;
246
247 /*
248 * Note. This works only before you used a work tree. This was added
249 * primarily to support git-clone to work in a new repository it just
250 * created, and is not meant to flip between different work trees.
251 */
252 void set_git_work_tree(const char *new_work_tree)
253 {
254 if (git_work_tree_initialized) {
255 new_work_tree = real_path(new_work_tree);
256 if (strcmp(new_work_tree, the_repository->worktree))
257 die("internal error: work tree has already been set\n"
258 "Current worktree: %s\nNew worktree: %s",
259 the_repository->worktree, new_work_tree);
260 return;
261 }
262 git_work_tree_initialized = 1;
263 repo_set_worktree(the_repository, new_work_tree);
264 }
265
266 const char *get_git_work_tree(void)
267 {
268 return the_repository->worktree;
269 }
270
271 char *get_object_directory(void)
272 {
273 if (!the_repository->objectdir)
274 BUG("git environment hasn't been setup");
275 return the_repository->objectdir;
276 }
277
278 int odb_mkstemp(struct strbuf *template, const char *pattern)
279 {
280 int fd;
281 /*
282 * we let the umask do its job, don't try to be more
283 * restrictive except to remove write permission.
284 */
285 int mode = 0444;
286 git_path_buf(template, "objects/%s", pattern);
287 fd = git_mkstemp_mode(template->buf, mode);
288 if (0 <= fd)
289 return fd;
290
291 /* slow path */
292 /* some mkstemp implementations erase template on failure */
293 git_path_buf(template, "objects/%s", pattern);
294 safe_create_leading_directories(template->buf);
295 return xmkstemp_mode(template->buf, mode);
296 }
297
298 int odb_pack_keep(const char *name)
299 {
300 int fd;
301
302 fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
303 if (0 <= fd)
304 return fd;
305
306 /* slow path */
307 safe_create_leading_directories_const(name);
308 return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
309 }
310
311 char *get_index_file(void)
312 {
313 if (!the_repository->index_file)
314 BUG("git environment hasn't been setup");
315 return the_repository->index_file;
316 }
317
318 char *get_graft_file(void)
319 {
320 if (!the_repository->graft_file)
321 BUG("git environment hasn't been setup");
322 return the_repository->graft_file;
323 }
324
325 int set_git_dir(const char *path)
326 {
327 if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
328 return error("Could not set GIT_DIR to '%s'", path);
329 setup_git_env(path);
330 return 0;
331 }
332
333 const char *get_log_output_encoding(void)
334 {
335 return git_log_output_encoding ? git_log_output_encoding
336 : get_commit_output_encoding();
337 }
338
339 const char *get_commit_output_encoding(void)
340 {
341 return git_commit_encoding ? git_commit_encoding : "UTF-8";
342 }
343
344 static int the_shared_repository = PERM_UMASK;
345 static int need_shared_repository_from_config = 1;
346
347 void set_shared_repository(int value)
348 {
349 the_shared_repository = value;
350 need_shared_repository_from_config = 0;
351 }
352
353 int get_shared_repository(void)
354 {
355 if (need_shared_repository_from_config) {
356 const char *var = "core.sharedrepository";
357 const char *value;
358 if (!git_config_get_value(var, &value))
359 the_shared_repository = git_config_perm(var, value);
360 need_shared_repository_from_config = 0;
361 }
362 return the_shared_repository;
363 }
364
365 void reset_shared_repository(void)
366 {
367 need_shared_repository_from_config = 1;
368 }
369
370 int use_optional_locks(void)
371 {
372 return git_env_bool(GIT_OPTIONAL_LOCKS_ENVIRONMENT, 1);
373 }
374
375 int print_sha1_ellipsis(void)
376 {
377 /*
378 * Determine if the calling environment contains the variable
379 * GIT_PRINT_SHA1_ELLIPSIS set to "yes".
380 */
381 static int cached_result = -1; /* unknown */
382
383 if (cached_result < 0) {
384 const char *v = getenv("GIT_PRINT_SHA1_ELLIPSIS");
385 cached_result = (v && !strcasecmp(v, "yes"));
386 }
387 return cached_result;
388 }