aboutsummaryrefslogtreecommitdiff
path: root/environment.c
blob: 96160a75a53340fcc9b2e1a81d2198d073bd4562 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
/*
 * We put all the git config variables in this same object
 * file, so that programs can link against the config parser
 * without having to link against all the rest of git.
 *
 * In particular, no need to bring in libz etc unless needed,
 * even if you might want to know where the git directory etc
 * are.
 */
#include "cache.h"
#include "refs.h"
#include "fmt-merge-msg.h"
#include "commit.h"

int trust_executable_bit = 1;
int trust_ctime = 1;
int check_stat = 1;
int has_symlinks = 1;
int minimum_abbrev = 4, default_abbrev = 7;
int ignore_case;
int assume_unchanged;
int prefer_symlink_refs;
int is_bare_repository_cfg = -1; /* unspecified */
int log_all_ref_updates = -1; /* unspecified */
int warn_ambiguous_refs = 1;
int warn_on_object_refname_ambiguity = 1;
int ref_paranoia = -1;
int repository_format_precious_objects;
const char *git_commit_encoding;
const char *git_log_output_encoding;
const char *apply_default_whitespace;
const char *apply_default_ignorewhitespace;
const char *git_attributes_file;
int zlib_compression_level = Z_BEST_SPEED;
int core_compression_level;
int core_compression_seen;
int fsync_object_files;
size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
size_t delta_base_cache_limit = 96 * 1024 * 1024;
unsigned long big_file_threshold = 512 * 1024 * 1024;
const char *pager_program;
int pager_use_color = 1;
const char *editor_program;
const char *askpass_program;
const char *excludes_file;
enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
int check_replace_refs = 1;
char *git_replace_ref_base;
enum eol core_eol = EOL_UNSET;
enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
#ifndef OBJECT_CREATION_MODE
#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
#endif
enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
char *notes_ref_name;
int grafts_replace_parents = 1;
int core_apply_sparse_checkout;
int merge_log_config = -1;
int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
unsigned long pack_size_limit_cfg;
enum hide_dotfiles_type hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;

#ifndef PROTECT_HFS_DEFAULT
#define PROTECT_HFS_DEFAULT 0
#endif
int protect_hfs = PROTECT_HFS_DEFAULT;

#ifndef PROTECT_NTFS_DEFAULT
#define PROTECT_NTFS_DEFAULT 0
#endif
int protect_ntfs = PROTECT_NTFS_DEFAULT;

/*
 * The character that begins a commented line in user-editable file
 * that is subject to stripspace.
 */
char comment_line_char = '#';
int auto_comment_line_char;

/* Parallel index stat data preload? */
int core_preload_index = 1;

/*
 * This is a hack for test programs like test-dump-untracked-cache to
 * ensure that they do not modify the untracked cache when reading it.
 * Do not use it otherwise!
 */
int ignore_untracked_cache_config;

/* This is set by setup_git_dir_gently() and/or git_default_config() */
char *git_work_tree_cfg;
static char *work_tree;

static const char *namespace;
static size_t namespace_len;

static const char *git_dir, *git_common_dir;
static char *git_object_dir, *git_index_file, *git_graft_file;
int git_db_env, git_index_env, git_graft_env, git_common_dir_env;

/*
 * Repository-local GIT_* environment variables; see cache.h for details.
 */
const char * const local_repo_env[] = {
	ALTERNATE_DB_ENVIRONMENT,
	CONFIG_ENVIRONMENT,
	CONFIG_DATA_ENVIRONMENT,
	DB_ENVIRONMENT,
	GIT_DIR_ENVIRONMENT,
	GIT_WORK_TREE_ENVIRONMENT,
	GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
	GRAFT_ENVIRONMENT,
	INDEX_ENVIRONMENT,
	NO_REPLACE_OBJECTS_ENVIRONMENT,
	GIT_REPLACE_REF_BASE_ENVIRONMENT,
	GIT_PREFIX_ENVIRONMENT,
	GIT_SHALLOW_FILE_ENVIRONMENT,
	GIT_COMMON_DIR_ENVIRONMENT,
	NULL
};

static char *expand_namespace(const char *raw_namespace)
{
	struct strbuf buf = STRBUF_INIT;
	struct strbuf **components, **c;

	if (!raw_namespace || !*raw_namespace)
		return xstrdup("");

	strbuf_addstr(&buf, raw_namespace);
	components = strbuf_split(&buf, '/');
	strbuf_reset(&buf);
	for (c = components; *c; c++)
		if (strcmp((*c)->buf, "/") != 0)
			strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
	strbuf_list_free(components);
	if (check_refname_format(buf.buf, 0))
		die("bad git namespace path \"%s\"", raw_namespace);
	strbuf_addch(&buf, '/');
	return strbuf_detach(&buf, NULL);
}

static char *git_path_from_env(const char *envvar, const char *git_dir,
			       const char *path, int *fromenv)
{
	const char *value = getenv(envvar);
	if (!value)
		return xstrfmt("%s/%s", git_dir, path);
	if (fromenv)
		*fromenv = 1;
	return xstrdup(value);
}

static void setup_git_env(void)
{
	struct strbuf sb = STRBUF_INIT;
	const char *gitfile;
	const char *shallow_file;
	const char *replace_ref_base;

	git_dir = getenv(GIT_DIR_ENVIRONMENT);
	if (!git_dir)
		git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
	gitfile = read_gitfile(git_dir);
	git_dir = xstrdup(gitfile ? gitfile : git_dir);
	if (get_common_dir(&sb, git_dir))
		git_common_dir_env = 1;
	git_common_dir = strbuf_detach(&sb, NULL);
	git_object_dir = git_path_from_env(DB_ENVIRONMENT, git_common_dir,
					   "objects", &git_db_env);
	git_index_file = git_path_from_env(INDEX_ENVIRONMENT, git_dir,
					   "index", &git_index_env);
	git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, git_common_dir,
					   "info/grafts", &git_graft_env);
	if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
		check_replace_refs = 0;
	replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
	git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
							  : "refs/replace/");
	namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
	namespace_len = strlen(namespace);
	shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
	if (shallow_file)
		set_alternate_shallow_file(shallow_file, 0);
}

int is_bare_repository(void)
{
	/* if core.bare is not 'false', let's see if there is a work tree */
	return is_bare_repository_cfg && !get_git_work_tree();
}

const char *get_git_dir(void)
{
	if (!git_dir)
		setup_git_env();
	return git_dir;
}

const char *get_git_common_dir(void)
{
	return git_common_dir;
}

const char *get_git_namespace(void)
{
	if (!namespace)
		setup_git_env();
	return namespace;
}

const char *strip_namespace(const char *namespaced_ref)
{
	if (!starts_with(namespaced_ref, get_git_namespace()))
		return NULL;
	return namespaced_ref + namespace_len;
}

static int git_work_tree_initialized;

/*
 * Note.  This works only before you used a work tree.  This was added
 * primarily to support git-clone to work in a new repository it just
 * created, and is not meant to flip between different work trees.
 */
void set_git_work_tree(const char *new_work_tree)
{
	if (git_work_tree_initialized) {
		new_work_tree = real_path(new_work_tree);
		if (strcmp(new_work_tree, work_tree))
			die("internal error: work tree has already been set\n"
			    "Current worktree: %s\nNew worktree: %s",
			    work_tree, new_work_tree);
		return;
	}
	git_work_tree_initialized = 1;
	work_tree = xstrdup(real_path(new_work_tree));
}

const char *get_git_work_tree(void)
{
	return work_tree;
}

char *get_object_directory(void)
{
	if (!git_object_dir)
		setup_git_env();
	return git_object_dir;
}

int odb_mkstemp(char *template, size_t limit, const char *pattern)
{
	int fd;
	/*
	 * we let the umask do its job, don't try to be more
	 * restrictive except to remove write permission.
	 */
	int mode = 0444;
	snprintf(template, limit, "%s/%s",
		 get_object_directory(), pattern);
	fd = git_mkstemp_mode(template, mode);
	if (0 <= fd)
		return fd;

	/* slow path */
	/* some mkstemp implementations erase template on failure */
	snprintf(template, limit, "%s/%s",
		 get_object_directory(), pattern);
	safe_create_leading_directories(template);
	return xmkstemp_mode(template, mode);
}

int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1)
{
	int fd;

	snprintf(name, namesz, "%s/pack/pack-%s.keep",
		 get_object_directory(), sha1_to_hex(sha1));
	fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
	if (0 <= fd)
		return fd;

	/* slow path */
	safe_create_leading_directories(name);
	return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
}

char *get_index_file(void)
{
	if (!git_index_file)
		setup_git_env();
	return git_index_file;
}

char *get_graft_file(void)
{
	if (!git_graft_file)
		setup_git_env();
	return git_graft_file;
}

int set_git_dir(const char *path)
{
	if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
		return error("Could not set GIT_DIR to '%s'", path);
	setup_git_env();
	return 0;
}

const char *get_log_output_encoding(void)
{
	return git_log_output_encoding ? git_log_output_encoding
		: get_commit_output_encoding();
}

const char *get_commit_output_encoding(void)
{
	return git_commit_encoding ? git_commit_encoding : "UTF-8";
}

static int the_shared_repository = PERM_UMASK;
static int need_shared_repository_from_config = 1;

void set_shared_repository(int value)
{
	the_shared_repository = value;
	need_shared_repository_from_config = 0;
}

int get_shared_repository(void)
{
	if (need_shared_repository_from_config) {
		const char *var = "core.sharedrepository";
		const char *value;
		if (!git_config_get_value(var, &value))
			the_shared_repository = git_config_perm(var, value);
		need_shared_repository_from_config = 0;
	}
	return the_shared_repository;
}