Win32: fix detection of empty directories in is_dir_empty
[git/dscho.git] / environment.c
blob71e438c059ed2efb21177f12cb248a6f7cb5542c
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.
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"
14 int trust_executable_bit = 1;
15 int trust_ctime = 1;
16 int has_symlinks = 1;
17 int minimum_abbrev = 4, default_abbrev = 7;
18 int ignore_case;
19 int assume_unchanged;
20 int prefer_symlink_refs;
21 int is_bare_repository_cfg = -1; /* unspecified */
22 int log_all_ref_updates = -1; /* unspecified */
23 int warn_ambiguous_refs = 1;
24 int repository_format_version;
25 const char *git_commit_encoding;
26 const char *git_log_output_encoding;
27 int shared_repository = PERM_UMASK;
28 const char *apply_default_whitespace;
29 const char *apply_default_ignorewhitespace;
30 const char *git_attributes_file;
31 int zlib_compression_level = Z_BEST_SPEED;
32 int core_compression_level;
33 int core_compression_seen;
34 int fsync_object_files;
35 size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
36 size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
37 size_t delta_base_cache_limit = 16 * 1024 * 1024;
38 unsigned long big_file_threshold = 512 * 1024 * 1024;
39 const char *log_pack_access;
40 const char *pager_program;
41 int pager_use_color = 1;
42 const char *editor_program;
43 const char *askpass_program;
44 const char *excludes_file;
45 enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
46 int read_replace_refs = 1; /* NEEDSWORK: rename to use_replace_refs */
47 enum eol core_eol = EOL_UNSET;
48 enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
49 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
50 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
51 enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
52 enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
53 #ifndef OBJECT_CREATION_MODE
54 #define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
55 #endif
56 enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
57 char *notes_ref_name;
58 int grafts_replace_parents = 1;
59 int core_apply_sparse_checkout;
60 int merge_log_config = -1;
61 int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
62 struct startup_info *startup_info;
63 unsigned long pack_size_limit_cfg;
64 enum hide_dotfiles_type hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
66 /* Parallel index stat data preload? */
67 int core_preload_index = 0;
69 /* This is set by setup_git_dir_gently() and/or git_default_config() */
70 char *git_work_tree_cfg;
71 static char *work_tree;
73 static const char *namespace;
74 static size_t namespace_len;
76 static const char *git_dir;
77 static char *git_object_dir, *git_index_file, *git_graft_file;
80 * Repository-local GIT_* environment variables
81 * Remember to update local_repo_env_size in cache.h when
82 * the size of the list changes
84 const char * const local_repo_env[LOCAL_REPO_ENV_SIZE + 1] = {
85 ALTERNATE_DB_ENVIRONMENT,
86 CONFIG_ENVIRONMENT,
87 CONFIG_DATA_ENVIRONMENT,
88 DB_ENVIRONMENT,
89 GIT_DIR_ENVIRONMENT,
90 GIT_WORK_TREE_ENVIRONMENT,
91 GRAFT_ENVIRONMENT,
92 INDEX_ENVIRONMENT,
93 NO_REPLACE_OBJECTS_ENVIRONMENT,
94 NULL
97 static char *expand_namespace(const char *raw_namespace)
99 struct strbuf buf = STRBUF_INIT;
100 struct strbuf **components, **c;
102 if (!raw_namespace || !*raw_namespace)
103 return xstrdup("");
105 strbuf_addstr(&buf, raw_namespace);
106 components = strbuf_split(&buf, '/');
107 strbuf_reset(&buf);
108 for (c = components; *c; c++)
109 if (strcmp((*c)->buf, "/") != 0)
110 strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
111 strbuf_list_free(components);
112 if (check_refname_format(buf.buf, 0))
113 die("bad git namespace path \"%s\"", raw_namespace);
114 strbuf_addch(&buf, '/');
115 return strbuf_detach(&buf, NULL);
118 static void setup_git_env(void)
120 git_dir = getenv(GIT_DIR_ENVIRONMENT);
121 git_dir = git_dir ? xstrdup(git_dir) : NULL;
122 if (!git_dir) {
123 git_dir = read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
124 git_dir = git_dir ? xstrdup(git_dir) : NULL;
126 if (!git_dir)
127 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
128 git_object_dir = getenv(DB_ENVIRONMENT);
129 if (!git_object_dir) {
130 git_object_dir = xmalloc(strlen(git_dir) + 9);
131 sprintf(git_object_dir, "%s/objects", git_dir);
133 git_index_file = getenv(INDEX_ENVIRONMENT);
134 if (!git_index_file) {
135 git_index_file = xmalloc(strlen(git_dir) + 7);
136 sprintf(git_index_file, "%s/index", git_dir);
138 git_graft_file = getenv(GRAFT_ENVIRONMENT);
139 if (!git_graft_file)
140 git_graft_file = git_pathdup("info/grafts");
141 if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
142 read_replace_refs = 0;
143 namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
144 namespace_len = strlen(namespace);
147 int is_bare_repository(void)
149 /* if core.bare is not 'false', let's see if there is a work tree */
150 return is_bare_repository_cfg && !get_git_work_tree();
153 int have_git_dir(void)
155 return !!git_dir;
158 const char *get_git_dir(void)
160 if (!git_dir)
161 setup_git_env();
162 return git_dir;
165 const char *get_git_namespace(void)
167 if (!namespace)
168 setup_git_env();
169 return namespace;
172 const char *strip_namespace(const char *namespaced_ref)
174 if (prefixcmp(namespaced_ref, get_git_namespace()) != 0)
175 return NULL;
176 return namespaced_ref + namespace_len;
179 static int git_work_tree_initialized;
182 * Note. This works only before you used a work tree. This was added
183 * primarily to support git-clone to work in a new repository it just
184 * created, and is not meant to flip between different work trees.
186 void set_git_work_tree(const char *new_work_tree)
188 if (git_work_tree_initialized) {
189 new_work_tree = real_path(new_work_tree);
190 if (strcmp(new_work_tree, work_tree))
191 die("internal error: work tree has already been set\n"
192 "Current worktree: %s\nNew worktree: %s",
193 work_tree, new_work_tree);
194 return;
196 git_work_tree_initialized = 1;
197 work_tree = xstrdup(real_path(new_work_tree));
200 const char *get_git_work_tree(void)
202 return work_tree;
205 char *get_object_directory(void)
207 if (!git_object_dir)
208 setup_git_env();
209 return git_object_dir;
212 int odb_mkstemp(char *template, size_t limit, const char *pattern)
214 int fd;
216 * we let the umask do its job, don't try to be more
217 * restrictive except to remove write permission.
219 int mode = 0444;
220 snprintf(template, limit, "%s/%s",
221 get_object_directory(), pattern);
222 fd = git_mkstemp_mode(template, mode);
223 if (0 <= fd)
224 return fd;
226 /* slow path */
227 /* some mkstemp implementations erase template on failure */
228 snprintf(template, limit, "%s/%s",
229 get_object_directory(), pattern);
230 safe_create_leading_directories(template);
231 return xmkstemp_mode(template, mode);
234 int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1)
236 int fd;
238 snprintf(name, namesz, "%s/pack/pack-%s.keep",
239 get_object_directory(), sha1_to_hex(sha1));
240 fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
241 if (0 <= fd)
242 return fd;
244 /* slow path */
245 safe_create_leading_directories(name);
246 return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
249 char *get_index_file(void)
251 if (!git_index_file)
252 setup_git_env();
253 return git_index_file;
256 char *get_graft_file(void)
258 if (!git_graft_file)
259 setup_git_env();
260 return git_graft_file;
263 int set_git_dir(const char *path)
265 if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
266 return error("Could not set GIT_DIR to '%s'", path);
267 setup_git_env();
268 return 0;
271 const char *get_log_output_encoding(void)
273 return git_log_output_encoding ? git_log_output_encoding
274 : get_commit_output_encoding();
277 const char *get_commit_output_encoding(void)
279 return git_commit_encoding ? git_commit_encoding : "UTF-8";