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 "refs.h"
12#include "fmt-merge-msg.h"
13int trust_executable_bit = 1;
15int trust_ctime = 1;
16int has_symlinks = 1;
17int minimum_abbrev = 4, default_abbrev = 7;
18int ignore_case;
19int assume_unchanged;
20int prefer_symlink_refs;
21int is_bare_repository_cfg = -1; /* unspecified */
22int log_all_ref_updates = -1; /* unspecified */
23int warn_ambiguous_refs = 1;
24int repository_format_version;
25const char *git_commit_encoding;
26const char *git_log_output_encoding;
27int shared_repository = PERM_UMASK;
28const char *apply_default_whitespace;
29const char *apply_default_ignorewhitespace;
30const char *git_attributes_file;
31int zlib_compression_level = Z_BEST_SPEED;
32int core_compression_level;
33int core_compression_seen;
34int fsync_object_files;
35size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
36size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
37size_t delta_base_cache_limit = 16 * 1024 * 1024;
38unsigned long big_file_threshold = 512 * 1024 * 1024;
39const char *log_pack_access;
40const char *pager_program;
41int pager_use_color = 1;
42const char *editor_program;
43const char *askpass_program;
44const char *excludes_file;
45enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
46int read_replace_refs = 1; /* NEEDSWORK: rename to use_replace_refs */
47enum eol core_eol = EOL_UNSET;
48enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
49unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
50enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
51enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
52enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
53#ifndef OBJECT_CREATION_MODE
54#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
55#endif
56enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
57char *notes_ref_name;
58int grafts_replace_parents = 1;
59int core_apply_sparse_checkout;
60int merge_log_config = -1;
61struct startup_info *startup_info;
62unsigned long pack_size_limit_cfg;
63/* Parallel index stat data preload? */
65int core_preload_index = 0;
66/* This is set by setup_git_dir_gently() and/or git_default_config() */
68char *git_work_tree_cfg;
69static char *work_tree;
70static const char *namespace;
72static size_t namespace_len;
73static const char *git_dir;
75static char *git_object_dir, *git_index_file, *git_graft_file;
76/*
78 * Repository-local GIT_* environment variables
79 * Remember to update local_repo_env_size in cache.h when
80 * the size of the list changes
81 */
82const char * const local_repo_env[LOCAL_REPO_ENV_SIZE + 1] = {
83 ALTERNATE_DB_ENVIRONMENT,
84 CONFIG_ENVIRONMENT,
85 CONFIG_DATA_ENVIRONMENT,
86 DB_ENVIRONMENT,
87 GIT_DIR_ENVIRONMENT,
88 GIT_WORK_TREE_ENVIRONMENT,
89 GRAFT_ENVIRONMENT,
90 INDEX_ENVIRONMENT,
91 NO_REPLACE_OBJECTS_ENVIRONMENT,
92 NULL
93};
94static char *expand_namespace(const char *raw_namespace)
96{
97 struct strbuf buf = STRBUF_INIT;
98 struct strbuf **components, **c;
99 if (!raw_namespace || !*raw_namespace)
101 return xstrdup("");
102 strbuf_addstr(&buf, raw_namespace);
104 components = strbuf_split(&buf, '/');
105 strbuf_reset(&buf);
106 for (c = components; *c; c++)
107 if (strcmp((*c)->buf, "/") != 0)
108 strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
109 strbuf_list_free(components);
110 if (check_refname_format(buf.buf, 0))
111 die("bad git namespace path \"%s\"", raw_namespace);
112 strbuf_addch(&buf, '/');
113 return strbuf_detach(&buf, NULL);
114}
115static void setup_git_env(void)
117{
118 git_dir = getenv(GIT_DIR_ENVIRONMENT);
119 git_dir = git_dir ? xstrdup(git_dir) : NULL;
120 if (!git_dir) {
121 git_dir = read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
122 git_dir = git_dir ? xstrdup(git_dir) : NULL;
123 }
124 if (!git_dir)
125 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
126 git_object_dir = getenv(DB_ENVIRONMENT);
127 if (!git_object_dir) {
128 git_object_dir = xmalloc(strlen(git_dir) + 9);
129 sprintf(git_object_dir, "%s/objects", git_dir);
130 }
131 git_index_file = getenv(INDEX_ENVIRONMENT);
132 if (!git_index_file) {
133 git_index_file = xmalloc(strlen(git_dir) + 7);
134 sprintf(git_index_file, "%s/index", git_dir);
135 }
136 git_graft_file = getenv(GRAFT_ENVIRONMENT);
137 if (!git_graft_file)
138 git_graft_file = git_pathdup("info/grafts");
139 if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
140 read_replace_refs = 0;
141 namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
142 namespace_len = strlen(namespace);
143}
144int is_bare_repository(void)
146{
147 /* if core.bare is not 'false', let's see if there is a work tree */
148 return is_bare_repository_cfg && !get_git_work_tree();
149}
150int have_git_dir(void)
152{
153 return !!git_dir;
154}
155const char *get_git_dir(void)
157{
158 if (!git_dir)
159 setup_git_env();
160 return git_dir;
161}
162const char *get_git_namespace(void)
164{
165 if (!namespace)
166 setup_git_env();
167 return namespace;
168}
169const char *strip_namespace(const char *namespaced_ref)
171{
172 if (prefixcmp(namespaced_ref, get_git_namespace()) != 0)
173 return NULL;
174 return namespaced_ref + namespace_len;
175}
176static int git_work_tree_initialized;
178/*
180 * Note. This works only before you used a work tree. This was added
181 * primarily to support git-clone to work in a new repository it just
182 * created, and is not meant to flip between different work trees.
183 */
184void set_git_work_tree(const char *new_work_tree)
185{
186 if (git_work_tree_initialized) {
187 new_work_tree = real_path(new_work_tree);
188 if (strcmp(new_work_tree, work_tree))
189 die("internal error: work tree has already been set\n"
190 "Current worktree: %s\nNew worktree: %s",
191 work_tree, new_work_tree);
192 return;
193 }
194 git_work_tree_initialized = 1;
195 work_tree = xstrdup(real_path(new_work_tree));
196}
197const char *get_git_work_tree(void)
199{
200 return work_tree;
201}
202char *get_object_directory(void)
204{
205 if (!git_object_dir)
206 setup_git_env();
207 return git_object_dir;
208}
209int odb_mkstemp(char *template, size_t limit, const char *pattern)
211{
212 int fd;
213 /*
214 * we let the umask do its job, don't try to be more
215 * restrictive except to remove write permission.
216 */
217 int mode = 0444;
218 snprintf(template, limit, "%s/%s",
219 get_object_directory(), pattern);
220 fd = git_mkstemp_mode(template, mode);
221 if (0 <= fd)
222 return fd;
223 /* slow path */
225 /* some mkstemp implementations erase template on failure */
226 snprintf(template, limit, "%s/%s",
227 get_object_directory(), pattern);
228 safe_create_leading_directories(template);
229 return xmkstemp_mode(template, mode);
230}
231int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1)
233{
234 int fd;
235 snprintf(name, namesz, "%s/pack/pack-%s.keep",
237 get_object_directory(), sha1_to_hex(sha1));
238 fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
239 if (0 <= fd)
240 return fd;
241 /* slow path */
243 safe_create_leading_directories(name);
244 return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
245}
246char *get_index_file(void)
248{
249 if (!git_index_file)
250 setup_git_env();
251 return git_index_file;
252}
253char *get_graft_file(void)
255{
256 if (!git_graft_file)
257 setup_git_env();
258 return git_graft_file;
259}
260int set_git_dir(const char *path)
262{
263 if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
264 return error("Could not set GIT_DIR to '%s'", path);
265 setup_git_env();
266 return 0;
267}
268const char *get_log_output_encoding(void)
270{
271 return git_log_output_encoding ? git_log_output_encoding
272 : get_commit_output_encoding();
273}
274const char *get_commit_output_encoding(void)
276{
277 return git_commit_encoding ? git_commit_encoding : "UTF-8";
278}