OSDN Git Service

Merge branch 'jc/pack-bitmap-unaligned'
[git-core/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 "config.h"
12 #include "refs.h"
13 #include "fmt-merge-msg.h"
14 #include "commit.h"
15
16 int trust_executable_bit = 1;
17 int trust_ctime = 1;
18 int check_stat = 1;
19 int has_symlinks = 1;
20 int minimum_abbrev = 4, default_abbrev = -1;
21 int ignore_case;
22 int assume_unchanged;
23 int prefer_symlink_refs;
24 int is_bare_repository_cfg = -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_precious_objects;
29 const char *git_commit_encoding;
30 const char *git_log_output_encoding;
31 const char *apply_default_whitespace;
32 const char *apply_default_ignorewhitespace;
33 const char *git_attributes_file;
34 const char *git_hooks_path;
35 int zlib_compression_level = Z_BEST_SPEED;
36 int core_compression_level;
37 int pack_compression_level = Z_DEFAULT_COMPRESSION;
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 int pager_use_color = 1;
44 const char *editor_program;
45 const char *askpass_program;
46 const char *excludes_file;
47 enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
48 int check_replace_refs = 1;
49 char *git_replace_ref_base;
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 unsigned long pack_size_limit_cfg;
66 enum hide_dotfiles_type hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
67 enum log_refs_config log_all_ref_updates = LOG_REFS_UNSET;
68
69 #ifndef PROTECT_HFS_DEFAULT
70 #define PROTECT_HFS_DEFAULT 0
71 #endif
72 int protect_hfs = PROTECT_HFS_DEFAULT;
73
74 #ifndef PROTECT_NTFS_DEFAULT
75 #define PROTECT_NTFS_DEFAULT 0
76 #endif
77 int protect_ntfs = PROTECT_NTFS_DEFAULT;
78
79 /*
80  * The character that begins a commented line in user-editable file
81  * that is subject to stripspace.
82  */
83 char comment_line_char = '#';
84 int auto_comment_line_char;
85
86 /* Parallel index stat data preload? */
87 int core_preload_index = 1;
88
89 /*
90  * This is a hack for test programs like test-dump-untracked-cache to
91  * ensure that they do not modify the untracked cache when reading it.
92  * Do not use it otherwise!
93  */
94 int ignore_untracked_cache_config;
95
96 /* This is set by setup_git_dir_gently() and/or git_default_config() */
97 char *git_work_tree_cfg;
98 static char *work_tree;
99
100 static const char *namespace;
101 static size_t namespace_len;
102
103 static const char *super_prefix;
104
105 static const char *git_dir, *git_common_dir;
106 static char *git_object_dir, *git_index_file, *git_graft_file;
107 int git_db_env, git_index_env, git_graft_env, git_common_dir_env;
108
109 /*
110  * Repository-local GIT_* environment variables; see cache.h for details.
111  */
112 const char * const local_repo_env[] = {
113         ALTERNATE_DB_ENVIRONMENT,
114         CONFIG_ENVIRONMENT,
115         CONFIG_DATA_ENVIRONMENT,
116         DB_ENVIRONMENT,
117         GIT_DIR_ENVIRONMENT,
118         GIT_WORK_TREE_ENVIRONMENT,
119         GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
120         GRAFT_ENVIRONMENT,
121         INDEX_ENVIRONMENT,
122         NO_REPLACE_OBJECTS_ENVIRONMENT,
123         GIT_REPLACE_REF_BASE_ENVIRONMENT,
124         GIT_PREFIX_ENVIRONMENT,
125         GIT_SUPER_PREFIX_ENVIRONMENT,
126         GIT_SHALLOW_FILE_ENVIRONMENT,
127         GIT_COMMON_DIR_ENVIRONMENT,
128         NULL
129 };
130
131 static char *expand_namespace(const char *raw_namespace)
132 {
133         struct strbuf buf = STRBUF_INIT;
134         struct strbuf **components, **c;
135
136         if (!raw_namespace || !*raw_namespace)
137                 return xstrdup("");
138
139         strbuf_addstr(&buf, raw_namespace);
140         components = strbuf_split(&buf, '/');
141         strbuf_reset(&buf);
142         for (c = components; *c; c++)
143                 if (strcmp((*c)->buf, "/") != 0)
144                         strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
145         strbuf_list_free(components);
146         if (check_refname_format(buf.buf, 0))
147                 die("bad git namespace path \"%s\"", raw_namespace);
148         strbuf_addch(&buf, '/');
149         return strbuf_detach(&buf, NULL);
150 }
151
152 static char *git_path_from_env(const char *envvar, const char *git_dir,
153                                const char *path, int *fromenv)
154 {
155         const char *value = getenv(envvar);
156         if (!value)
157                 return xstrfmt("%s/%s", git_dir, path);
158         if (fromenv)
159                 *fromenv = 1;
160         return xstrdup(value);
161 }
162
163 static void setup_git_env(void)
164 {
165         struct strbuf sb = STRBUF_INIT;
166         const char *gitfile;
167         const char *shallow_file;
168         const char *replace_ref_base;
169
170         git_dir = getenv(GIT_DIR_ENVIRONMENT);
171         if (!git_dir) {
172                 if (!startup_info->have_repository)
173                         BUG("setup_git_env called without repository");
174                 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
175         }
176         gitfile = read_gitfile(git_dir);
177         git_dir = xstrdup(gitfile ? gitfile : git_dir);
178         if (get_common_dir(&sb, git_dir))
179                 git_common_dir_env = 1;
180         git_common_dir = strbuf_detach(&sb, NULL);
181         git_object_dir = git_path_from_env(DB_ENVIRONMENT, git_common_dir,
182                                            "objects", &git_db_env);
183         git_index_file = git_path_from_env(INDEX_ENVIRONMENT, git_dir,
184                                            "index", &git_index_env);
185         git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, git_common_dir,
186                                            "info/grafts", &git_graft_env);
187         if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
188                 check_replace_refs = 0;
189         replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
190         git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
191                                                           : "refs/replace/");
192         namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
193         namespace_len = strlen(namespace);
194         shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
195         if (shallow_file)
196                 set_alternate_shallow_file(shallow_file, 0);
197 }
198
199 int is_bare_repository(void)
200 {
201         /* if core.bare is not 'false', let's see if there is a work tree */
202         return is_bare_repository_cfg && !get_git_work_tree();
203 }
204
205 int have_git_dir(void)
206 {
207         return startup_info->have_repository
208                 || git_dir
209                 || getenv(GIT_DIR_ENVIRONMENT);
210 }
211
212 const char *get_git_dir(void)
213 {
214         if (!git_dir)
215                 setup_git_env();
216         return git_dir;
217 }
218
219 const char *get_git_common_dir(void)
220 {
221         if (!git_dir)
222                 setup_git_env();
223         return git_common_dir;
224 }
225
226 const char *get_git_namespace(void)
227 {
228         if (!namespace)
229                 setup_git_env();
230         return namespace;
231 }
232
233 const char *strip_namespace(const char *namespaced_ref)
234 {
235         if (!starts_with(namespaced_ref, get_git_namespace()))
236                 return NULL;
237         return namespaced_ref + namespace_len;
238 }
239
240 const char *get_super_prefix(void)
241 {
242         static int initialized;
243         if (!initialized) {
244                 super_prefix = getenv(GIT_SUPER_PREFIX_ENVIRONMENT);
245                 initialized = 1;
246         }
247         return super_prefix;
248 }
249
250 static int git_work_tree_initialized;
251
252 /*
253  * Note.  This works only before you used a work tree.  This was added
254  * primarily to support git-clone to work in a new repository it just
255  * created, and is not meant to flip between different work trees.
256  */
257 void set_git_work_tree(const char *new_work_tree)
258 {
259         if (git_work_tree_initialized) {
260                 new_work_tree = real_path(new_work_tree);
261                 if (strcmp(new_work_tree, work_tree))
262                         die("internal error: work tree has already been set\n"
263                             "Current worktree: %s\nNew worktree: %s",
264                             work_tree, new_work_tree);
265                 return;
266         }
267         git_work_tree_initialized = 1;
268         work_tree = real_pathdup(new_work_tree, 1);
269 }
270
271 const char *get_git_work_tree(void)
272 {
273         return work_tree;
274 }
275
276 char *get_object_directory(void)
277 {
278         if (!git_object_dir)
279                 setup_git_env();
280         return git_object_dir;
281 }
282
283 int odb_mkstemp(struct strbuf *template, const char *pattern)
284 {
285         int fd;
286         /*
287          * we let the umask do its job, don't try to be more
288          * restrictive except to remove write permission.
289          */
290         int mode = 0444;
291         git_path_buf(template, "objects/%s", pattern);
292         fd = git_mkstemp_mode(template->buf, mode);
293         if (0 <= fd)
294                 return fd;
295
296         /* slow path */
297         /* some mkstemp implementations erase template on failure */
298         git_path_buf(template, "objects/%s", pattern);
299         safe_create_leading_directories(template->buf);
300         return xmkstemp_mode(template->buf, mode);
301 }
302
303 int odb_pack_keep(const char *name)
304 {
305         int fd;
306
307         fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
308         if (0 <= fd)
309                 return fd;
310
311         /* slow path */
312         safe_create_leading_directories_const(name);
313         return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
314 }
315
316 char *get_index_file(void)
317 {
318         if (!git_index_file)
319                 setup_git_env();
320         return git_index_file;
321 }
322
323 char *get_graft_file(void)
324 {
325         if (!git_graft_file)
326                 setup_git_env();
327         return git_graft_file;
328 }
329
330 int set_git_dir(const char *path)
331 {
332         if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
333                 return error("Could not set GIT_DIR to '%s'", path);
334         setup_git_env();
335         return 0;
336 }
337
338 const char *get_log_output_encoding(void)
339 {
340         return git_log_output_encoding ? git_log_output_encoding
341                 : get_commit_output_encoding();
342 }
343
344 const char *get_commit_output_encoding(void)
345 {
346         return git_commit_encoding ? git_commit_encoding : "UTF-8";
347 }
348
349 static int the_shared_repository = PERM_UMASK;
350 static int need_shared_repository_from_config = 1;
351
352 void set_shared_repository(int value)
353 {
354         the_shared_repository = value;
355         need_shared_repository_from_config = 0;
356 }
357
358 int get_shared_repository(void)
359 {
360         if (need_shared_repository_from_config) {
361                 const char *var = "core.sharedrepository";
362                 const char *value;
363                 if (!git_config_get_value(var, &value))
364                         the_shared_repository = git_config_perm(var, value);
365                 need_shared_repository_from_config = 0;
366         }
367         return the_shared_repository;
368 }
369
370 void reset_shared_repository(void)
371 {
372         need_shared_repository_from_config = 1;
373 }