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Commit | Line | Data |
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d288a700 | 1 | #include "cache.h" |
e90fdc39 | 2 | #include "dir.h" |
31171d9e | 3 | #include "string-list.h" |
e90fdc39 JS |
4 | |
5 | static int inside_git_dir = -1; | |
6 | static int inside_work_tree = -1; | |
fada7674 | 7 | static int work_tree_config_is_bogus; |
d288a700 | 8 | |
46c3cd44 JK |
9 | static struct startup_info the_startup_info; |
10 | struct startup_info *startup_info = &the_startup_info; | |
11 | ||
ddc2a628 MEW |
12 | /* |
13 | * The input parameter must contain an absolute path, and it must already be | |
14 | * normalized. | |
15 | * | |
16 | * Find the part of an absolute path that lies inside the work tree by | |
17 | * dereferencing symlinks outside the work tree, for example: | |
18 | * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file | |
19 | * /dir/file (work tree is /) -> dir/file | |
20 | * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2 | |
21 | * /dir/repolink/file (repolink points to /dir/repo) -> file | |
22 | * /dir/repo (exactly equal to work tree) -> (empty string) | |
23 | */ | |
24 | static int abspath_part_inside_repo(char *path) | |
25 | { | |
26 | size_t len; | |
27 | size_t wtlen; | |
28 | char *path0; | |
29 | int off; | |
30 | const char *work_tree = get_git_work_tree(); | |
31 | ||
32 | if (!work_tree) | |
33 | return -1; | |
34 | wtlen = strlen(work_tree); | |
35 | len = strlen(path); | |
6127ff63 | 36 | off = offset_1st_component(path); |
ddc2a628 MEW |
37 | |
38 | /* check if work tree is already the prefix */ | |
39 | if (wtlen <= len && !strncmp(path, work_tree, wtlen)) { | |
40 | if (path[wtlen] == '/') { | |
41 | memmove(path, path + wtlen + 1, len - wtlen); | |
42 | return 0; | |
43 | } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') { | |
44 | /* work tree is the root, or the whole path */ | |
45 | memmove(path, path + wtlen, len - wtlen + 1); | |
46 | return 0; | |
47 | } | |
48 | /* work tree might match beginning of a symlink to work tree */ | |
49 | off = wtlen; | |
50 | } | |
51 | path0 = path; | |
6127ff63 | 52 | path += off; |
ddc2a628 MEW |
53 | |
54 | /* check each '/'-terminated level */ | |
55 | while (*path) { | |
56 | path++; | |
57 | if (*path == '/') { | |
58 | *path = '\0'; | |
59 | if (strcmp(real_path(path0), work_tree) == 0) { | |
60 | memmove(path0, path + 1, len - (path - path0)); | |
61 | return 0; | |
62 | } | |
63 | *path = '/'; | |
64 | } | |
65 | } | |
66 | ||
67 | /* check whole path */ | |
68 | if (strcmp(real_path(path0), work_tree) == 0) { | |
69 | *path0 = '\0'; | |
70 | return 0; | |
71 | } | |
72 | ||
73 | return -1; | |
74 | } | |
75 | ||
645a29c4 NTND |
76 | /* |
77 | * Normalize "path", prepending the "prefix" for relative paths. If | |
78 | * remaining_prefix is not NULL, return the actual prefix still | |
79 | * remains in the path. For example, prefix = sub1/sub2/ and path is | |
80 | * | |
81 | * foo -> sub1/sub2/foo (full prefix) | |
82 | * ../foo -> sub1/foo (remaining prefix is sub1/) | |
83 | * ../../bar -> bar (no remaining prefix) | |
84 | * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix) | |
85 | * `pwd`/../bar -> sub1/bar (no remaining prefix) | |
86 | */ | |
87 | char *prefix_path_gently(const char *prefix, int len, | |
88 | int *remaining_prefix, const char *path) | |
d089ebaa JH |
89 | { |
90 | const char *orig = path; | |
18e051a3 CMAB |
91 | char *sanitized; |
92 | if (is_absolute_path(orig)) { | |
3733e694 | 93 | sanitized = xmallocz(strlen(path)); |
645a29c4 NTND |
94 | if (remaining_prefix) |
95 | *remaining_prefix = 0; | |
655ee9ea MEW |
96 | if (normalize_path_copy_len(sanitized, path, remaining_prefix)) { |
97 | free(sanitized); | |
98 | return NULL; | |
99 | } | |
100 | if (abspath_part_inside_repo(sanitized)) { | |
101 | free(sanitized); | |
102 | return NULL; | |
103 | } | |
18e051a3 | 104 | } else { |
24041d6b | 105 | sanitized = xstrfmt("%.*s%s", len, len ? prefix : "", path); |
645a29c4 NTND |
106 | if (remaining_prefix) |
107 | *remaining_prefix = len; | |
655ee9ea | 108 | if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) { |
546e0fd9 JK |
109 | free(sanitized); |
110 | return NULL; | |
d089ebaa | 111 | } |
d089ebaa JH |
112 | } |
113 | return sanitized; | |
f332726e LT |
114 | } |
115 | ||
546e0fd9 JK |
116 | char *prefix_path(const char *prefix, int len, const char *path) |
117 | { | |
645a29c4 | 118 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
119 | if (!r) |
120 | die("'%s' is outside repository", path); | |
121 | return r; | |
122 | } | |
123 | ||
124 | int path_inside_repo(const char *prefix, const char *path) | |
125 | { | |
126 | int len = prefix ? strlen(prefix) : 0; | |
645a29c4 | 127 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
128 | if (r) { |
129 | free(r); | |
130 | return 1; | |
131 | } | |
132 | return 0; | |
133 | } | |
134 | ||
c6e8c800 JH |
135 | int check_filename(const char *prefix, const char *arg) |
136 | { | |
137 | const char *name; | |
138 | struct stat st; | |
139 | ||
59556548 | 140 | if (starts_with(arg, ":/")) { |
4db86e8b NTND |
141 | if (arg[2] == '\0') /* ":/" is root dir, always exists */ |
142 | return 1; | |
143 | name = arg + 2; | |
df714f81 | 144 | } else if (prefix) |
4db86e8b NTND |
145 | name = prefix_filename(prefix, strlen(prefix), arg); |
146 | else | |
147 | name = arg; | |
c6e8c800 JH |
148 | if (!lstat(name, &st)) |
149 | return 1; /* file exists */ | |
150 | if (errno == ENOENT || errno == ENOTDIR) | |
151 | return 0; /* file does not exist */ | |
152 | die_errno("failed to stat '%s'", arg); | |
153 | } | |
154 | ||
023e37c3 MM |
155 | static void NORETURN die_verify_filename(const char *prefix, |
156 | const char *arg, | |
157 | int diagnose_misspelt_rev) | |
009fee47 | 158 | { |
023e37c3 | 159 | if (!diagnose_misspelt_rev) |
ab33a76e VA |
160 | die(_("%s: no such path in the working tree.\n" |
161 | "Use 'git <command> -- <path>...' to specify paths that do not exist locally."), | |
023e37c3 | 162 | arg); |
0e539dca JH |
163 | /* |
164 | * Saying "'(icase)foo' does not exist in the index" when the | |
165 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
166 | * begins with a colon and is followed by a non-alnum; do not | |
8c135ea2 | 167 | * let maybe_die_on_misspelt_object_name() even trigger. |
0e539dca JH |
168 | */ |
169 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
8c135ea2 | 170 | maybe_die_on_misspelt_object_name(arg, prefix); |
0e539dca | 171 | |
009fee47 | 172 | /* ... or fall back the most general message. */ |
ab33a76e VA |
173 | die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n" |
174 | "Use '--' to separate paths from revisions, like this:\n" | |
175 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
009fee47 MM |
176 | |
177 | } | |
178 | ||
e23d0b4a LT |
179 | /* |
180 | * Verify a filename that we got as an argument for a pathspec | |
181 | * entry. Note that a filename that begins with "-" never verifies | |
182 | * as true, because even if such a filename were to exist, we want | |
183 | * it to be preceded by the "--" marker (or we want the user to | |
184 | * use a format like "./-filename") | |
023e37c3 MM |
185 | * |
186 | * The "diagnose_misspelt_rev" is used to provide a user-friendly | |
187 | * diagnosis when dying upon finding that "name" is not a pathname. | |
188 | * If set to 1, the diagnosis will try to diagnose "name" as an | |
189 | * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis | |
190 | * will only complain about an inexisting file. | |
191 | * | |
192 | * This function is typically called to check that a "file or rev" | |
193 | * argument is unambiguous. In this case, the caller will want | |
194 | * diagnose_misspelt_rev == 1 when verifying the first non-rev | |
195 | * argument (which could have been a revision), and | |
196 | * diagnose_misspelt_rev == 0 for the next ones (because we already | |
197 | * saw a filename, there's not ambiguity anymore). | |
e23d0b4a | 198 | */ |
023e37c3 MM |
199 | void verify_filename(const char *prefix, |
200 | const char *arg, | |
201 | int diagnose_misspelt_rev) | |
e23d0b4a | 202 | { |
e23d0b4a LT |
203 | if (*arg == '-') |
204 | die("bad flag '%s' used after filename", arg); | |
df714f81 | 205 | if (check_filename(prefix, arg) || !no_wildcard(arg)) |
e23d0b4a | 206 | return; |
023e37c3 | 207 | die_verify_filename(prefix, arg, diagnose_misspelt_rev); |
e23d0b4a LT |
208 | } |
209 | ||
ea92f41f JH |
210 | /* |
211 | * Opposite of the above: the command line did not have -- marker | |
212 | * and we parsed the arg as a refname. It should not be interpretable | |
213 | * as a filename. | |
214 | */ | |
215 | void verify_non_filename(const char *prefix, const char *arg) | |
216 | { | |
7ae3df8c | 217 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 218 | return; |
ea92f41f JH |
219 | if (*arg == '-') |
220 | return; /* flag */ | |
c6e8c800 JH |
221 | if (!check_filename(prefix, arg)) |
222 | return; | |
ab33a76e VA |
223 | die(_("ambiguous argument '%s': both revision and filename\n" |
224 | "Use '--' to separate paths from revisions, like this:\n" | |
225 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
ea92f41f JH |
226 | } |
227 | ||
31e26ebc | 228 | int get_common_dir(struct strbuf *sb, const char *gitdir) |
11f9dd71 MK |
229 | { |
230 | const char *git_env_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT); | |
231 | if (git_env_common_dir) { | |
232 | strbuf_addstr(sb, git_env_common_dir); | |
233 | return 1; | |
234 | } else { | |
235 | return get_common_dir_noenv(sb, gitdir); | |
236 | } | |
237 | } | |
238 | ||
239 | int get_common_dir_noenv(struct strbuf *sb, const char *gitdir) | |
4dc4e145 NTND |
240 | { |
241 | struct strbuf data = STRBUF_INIT; | |
242 | struct strbuf path = STRBUF_INIT; | |
31e26ebc | 243 | int ret = 0; |
11f9dd71 | 244 | |
4dc4e145 NTND |
245 | strbuf_addf(&path, "%s/commondir", gitdir); |
246 | if (file_exists(path.buf)) { | |
247 | if (strbuf_read_file(&data, path.buf, 0) <= 0) | |
248 | die_errno(_("failed to read %s"), path.buf); | |
249 | while (data.len && (data.buf[data.len - 1] == '\n' || | |
250 | data.buf[data.len - 1] == '\r')) | |
251 | data.len--; | |
252 | data.buf[data.len] = '\0'; | |
253 | strbuf_reset(&path); | |
254 | if (!is_absolute_path(data.buf)) | |
255 | strbuf_addf(&path, "%s/", gitdir); | |
256 | strbuf_addbuf(&path, &data); | |
33ad9ddd | 257 | strbuf_add_real_path(sb, path.buf); |
31e26ebc | 258 | ret = 1; |
4ac9006f | 259 | } else { |
4dc4e145 | 260 | strbuf_addstr(sb, gitdir); |
4ac9006f BW |
261 | } |
262 | ||
4dc4e145 NTND |
263 | strbuf_release(&data); |
264 | strbuf_release(&path); | |
31e26ebc | 265 | return ret; |
4dc4e145 | 266 | } |
d288a700 | 267 | |
5f5608bc | 268 | /* |
ad1a382f | 269 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 270 | * We want to see: |
5f5608bc | 271 | * |
790296fd | 272 | * - either an objects/ directory _or_ the proper |
5f5608bc | 273 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 274 | * - a refs/ directory |
8098a178 | 275 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
276 | * a proper "ref:", or a regular file HEAD that has a properly |
277 | * formatted sha1 object name. | |
5f5608bc | 278 | */ |
b3256eb8 | 279 | int is_git_directory(const char *suspect) |
5f5608bc | 280 | { |
1d186b6f NTND |
281 | struct strbuf path = STRBUF_INIT; |
282 | int ret = 0; | |
283 | size_t len; | |
ad1a382f | 284 | |
4dc4e145 NTND |
285 | /* Check worktree-related signatures */ |
286 | strbuf_addf(&path, "%s/HEAD", suspect); | |
287 | if (validate_headref(path.buf)) | |
288 | goto done; | |
289 | ||
290 | strbuf_reset(&path); | |
291 | get_common_dir(&path, suspect); | |
1d186b6f | 292 | len = path.len; |
4dc4e145 NTND |
293 | |
294 | /* Check non-worktree-related signatures */ | |
ad1a382f SP |
295 | if (getenv(DB_ENVIRONMENT)) { |
296 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
1d186b6f | 297 | goto done; |
ad1a382f SP |
298 | } |
299 | else { | |
4dc4e145 | 300 | strbuf_setlen(&path, len); |
1d186b6f NTND |
301 | strbuf_addstr(&path, "/objects"); |
302 | if (access(path.buf, X_OK)) | |
303 | goto done; | |
ad1a382f SP |
304 | } |
305 | ||
1d186b6f NTND |
306 | strbuf_setlen(&path, len); |
307 | strbuf_addstr(&path, "/refs"); | |
308 | if (access(path.buf, X_OK)) | |
309 | goto done; | |
ad1a382f | 310 | |
1d186b6f NTND |
311 | ret = 1; |
312 | done: | |
313 | strbuf_release(&path); | |
314 | return ret; | |
5f5608bc LT |
315 | } |
316 | ||
ffd036b1 JK |
317 | int is_nonbare_repository_dir(struct strbuf *path) |
318 | { | |
319 | int ret = 0; | |
320 | int gitfile_error; | |
321 | size_t orig_path_len = path->len; | |
322 | assert(orig_path_len != 0); | |
323 | strbuf_complete(path, '/'); | |
324 | strbuf_addstr(path, ".git"); | |
325 | if (read_gitfile_gently(path->buf, &gitfile_error) || is_git_directory(path->buf)) | |
326 | ret = 1; | |
327 | if (gitfile_error == READ_GITFILE_ERR_OPEN_FAILED || | |
328 | gitfile_error == READ_GITFILE_ERR_READ_FAILED) | |
329 | ret = 1; | |
330 | strbuf_setlen(path, orig_path_len); | |
331 | return ret; | |
332 | } | |
333 | ||
68025633 JS |
334 | int is_inside_git_dir(void) |
335 | { | |
e90fdc39 JS |
336 | if (inside_git_dir < 0) |
337 | inside_git_dir = is_inside_dir(get_git_dir()); | |
338 | return inside_git_dir; | |
892c41b9 ML |
339 | } |
340 | ||
892c41b9 ML |
341 | int is_inside_work_tree(void) |
342 | { | |
e90fdc39 JS |
343 | if (inside_work_tree < 0) |
344 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
345 | return inside_work_tree; | |
892c41b9 ML |
346 | } |
347 | ||
f3fa1838 JH |
348 | void setup_work_tree(void) |
349 | { | |
354e6534 JS |
350 | const char *work_tree, *git_dir; |
351 | static int initialized = 0; | |
352 | ||
353 | if (initialized) | |
354 | return; | |
fada7674 JK |
355 | |
356 | if (work_tree_config_is_bogus) | |
357 | die("unable to set up work tree using invalid config"); | |
358 | ||
354e6534 JS |
359 | work_tree = get_git_work_tree(); |
360 | git_dir = get_git_dir(); | |
59f0f2f3 | 361 | if (!is_absolute_path(git_dir)) |
e2a57aac | 362 | git_dir = real_path(get_git_dir()); |
59f0f2f3 MH |
363 | if (!work_tree || chdir(work_tree)) |
364 | die("This operation must be run in a work tree"); | |
0ed74813 NTND |
365 | |
366 | /* | |
367 | * Make sure subsequent git processes find correct worktree | |
368 | * if $GIT_WORK_TREE is set relative | |
369 | */ | |
370 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
371 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
372 | ||
41894ae3 | 373 | set_git_dir(remove_leading_path(git_dir, work_tree)); |
354e6534 | 374 | initialized = 1; |
59f0f2f3 MH |
375 | } |
376 | ||
2cc7c2c7 | 377 | static int check_repo_format(const char *var, const char *value, void *vdata) |
31e26ebc | 378 | { |
2cc7c2c7 | 379 | struct repository_format *data = vdata; |
00a09d57 JK |
380 | const char *ext; |
381 | ||
31e26ebc | 382 | if (strcmp(var, "core.repositoryformatversion") == 0) |
2cc7c2c7 | 383 | data->version = git_config_int(var, value); |
00a09d57 JK |
384 | else if (skip_prefix(var, "extensions.", &ext)) { |
385 | /* | |
386 | * record any known extensions here; otherwise, | |
387 | * we fall through to recording it as unknown, and | |
388 | * check_repository_format will complain | |
389 | */ | |
390 | if (!strcmp(ext, "noop")) | |
391 | ; | |
067fbd41 | 392 | else if (!strcmp(ext, "preciousobjects")) |
2cc7c2c7 | 393 | data->precious_objects = git_config_bool(var, value); |
00a09d57 | 394 | else |
2cc7c2c7 | 395 | string_list_append(&data->unknown_extensions, ext); |
652f18ee JK |
396 | } else if (strcmp(var, "core.bare") == 0) { |
397 | data->is_bare = git_config_bool(var, value); | |
398 | } else if (strcmp(var, "core.worktree") == 0) { | |
399 | if (!value) | |
400 | return config_error_nonbool(var); | |
401 | data->work_tree = xstrdup(value); | |
00a09d57 | 402 | } |
31e26ebc NTND |
403 | return 0; |
404 | } | |
405 | ||
337e51ce | 406 | static int check_repository_format_gently(const char *gitdir, int *nongit_ok) |
9459aa77 | 407 | { |
7d0fb0da | 408 | struct strbuf sb = STRBUF_INIT; |
2cc7c2c7 JK |
409 | struct strbuf err = STRBUF_INIT; |
410 | struct repository_format candidate; | |
652f18ee | 411 | int has_common; |
00a09d57 | 412 | |
652f18ee | 413 | has_common = get_common_dir(&sb, gitdir); |
e61a509a | 414 | strbuf_addstr(&sb, "/config"); |
652f18ee | 415 | read_repository_format(&candidate, sb.buf); |
2cc7c2c7 | 416 | strbuf_release(&sb); |
e61a509a | 417 | |
337e51ce | 418 | /* |
2cc7c2c7 JK |
419 | * For historical use of check_repository_format() in git-init, |
420 | * we treat a missing config as a silent "ok", even when nongit_ok | |
421 | * is unset. | |
337e51ce | 422 | */ |
2cc7c2c7 JK |
423 | if (candidate.version < 0) |
424 | return 0; | |
425 | ||
426 | if (verify_repository_format(&candidate, &err) < 0) { | |
427 | if (nongit_ok) { | |
428 | warning("%s", err.buf); | |
429 | strbuf_release(&err); | |
430 | *nongit_ok = -1; | |
431 | return -1; | |
432 | } | |
433 | die("%s", err.buf); | |
434 | } | |
435 | ||
2cc7c2c7 JK |
436 | repository_format_precious_objects = candidate.precious_objects; |
437 | string_list_clear(&candidate.unknown_extensions, 0); | |
652f18ee JK |
438 | if (!has_common) { |
439 | if (candidate.is_bare != -1) { | |
440 | is_bare_repository_cfg = candidate.is_bare; | |
441 | if (is_bare_repository_cfg == 1) | |
442 | inside_work_tree = -1; | |
443 | } | |
444 | if (candidate.work_tree) { | |
445 | free(git_work_tree_cfg); | |
446 | git_work_tree_cfg = candidate.work_tree; | |
2cc7c2c7 | 447 | inside_work_tree = -1; |
652f18ee JK |
448 | } |
449 | } else { | |
450 | free(candidate.work_tree); | |
2cc7c2c7 JK |
451 | } |
452 | ||
453 | return 0; | |
454 | } | |
455 | ||
652f18ee | 456 | int read_repository_format(struct repository_format *format, const char *path) |
2cc7c2c7 JK |
457 | { |
458 | memset(format, 0, sizeof(*format)); | |
459 | format->version = -1; | |
460 | format->is_bare = -1; | |
461 | string_list_init(&format->unknown_extensions, 1); | |
652f18ee | 462 | git_config_from_file(check_repo_format, path, format); |
2cc7c2c7 JK |
463 | return format->version; |
464 | } | |
465 | ||
2cc7c2c7 JK |
466 | int verify_repository_format(const struct repository_format *format, |
467 | struct strbuf *err) | |
468 | { | |
469 | if (GIT_REPO_VERSION_READ < format->version) { | |
274db840 | 470 | strbuf_addf(err, _("Expected git repo version <= %d, found %d"), |
2cc7c2c7 JK |
471 | GIT_REPO_VERSION_READ, format->version); |
472 | return -1; | |
473 | } | |
474 | ||
475 | if (format->version >= 1 && format->unknown_extensions.nr) { | |
00a09d57 JK |
476 | int i; |
477 | ||
274db840 | 478 | strbuf_addstr(err, _("unknown repository extensions found:")); |
00a09d57 | 479 | |
2cc7c2c7 JK |
480 | for (i = 0; i < format->unknown_extensions.nr; i++) |
481 | strbuf_addf(err, "\n\t%s", | |
482 | format->unknown_extensions.items[i].string); | |
483 | return -1; | |
00a09d57 JK |
484 | } |
485 | ||
2cc7c2c7 | 486 | return 0; |
9459aa77 NTND |
487 | } |
488 | ||
5f29433f SB |
489 | void read_gitfile_error_die(int error_code, const char *path, const char *dir) |
490 | { | |
491 | switch (error_code) { | |
492 | case READ_GITFILE_ERR_STAT_FAILED: | |
493 | case READ_GITFILE_ERR_NOT_A_FILE: | |
494 | /* non-fatal; follow return path */ | |
495 | break; | |
496 | case READ_GITFILE_ERR_OPEN_FAILED: | |
497 | die_errno("Error opening '%s'", path); | |
498 | case READ_GITFILE_ERR_TOO_LARGE: | |
499 | die("Too large to be a .git file: '%s'", path); | |
500 | case READ_GITFILE_ERR_READ_FAILED: | |
501 | die("Error reading %s", path); | |
502 | case READ_GITFILE_ERR_INVALID_FORMAT: | |
503 | die("Invalid gitfile format: %s", path); | |
504 | case READ_GITFILE_ERR_NO_PATH: | |
505 | die("No path in gitfile: %s", path); | |
506 | case READ_GITFILE_ERR_NOT_A_REPO: | |
507 | die("Not a git repository: %s", dir); | |
508 | default: | |
509 | die("BUG: unknown error code"); | |
510 | } | |
511 | } | |
512 | ||
b44ebb19 LH |
513 | /* |
514 | * Try to read the location of the git directory from the .git file, | |
515 | * return path to git directory if found. | |
a93bedad EE |
516 | * |
517 | * On failure, if return_error_code is not NULL, return_error_code | |
518 | * will be set to an error code and NULL will be returned. If | |
519 | * return_error_code is NULL the function will die instead (for most | |
520 | * cases). | |
b44ebb19 | 521 | */ |
a93bedad | 522 | const char *read_gitfile_gently(const char *path, int *return_error_code) |
b44ebb19 | 523 | { |
921bdd96 | 524 | const int max_file_size = 1 << 20; /* 1MB */ |
a93bedad EE |
525 | int error_code = 0; |
526 | char *buf = NULL; | |
527 | char *dir = NULL; | |
40c813e0 | 528 | const char *slash; |
b44ebb19 LH |
529 | struct stat st; |
530 | int fd; | |
b1905aea | 531 | ssize_t len; |
b44ebb19 | 532 | |
a93bedad | 533 | if (stat(path, &st)) { |
5c4003ca | 534 | /* NEEDSWORK: discern between ENOENT vs other errors */ |
a93bedad EE |
535 | error_code = READ_GITFILE_ERR_STAT_FAILED; |
536 | goto cleanup_return; | |
537 | } | |
538 | if (!S_ISREG(st.st_mode)) { | |
539 | error_code = READ_GITFILE_ERR_NOT_A_FILE; | |
540 | goto cleanup_return; | |
541 | } | |
921bdd96 EE |
542 | if (st.st_size > max_file_size) { |
543 | error_code = READ_GITFILE_ERR_TOO_LARGE; | |
544 | goto cleanup_return; | |
545 | } | |
b44ebb19 | 546 | fd = open(path, O_RDONLY); |
a93bedad EE |
547 | if (fd < 0) { |
548 | error_code = READ_GITFILE_ERR_OPEN_FAILED; | |
549 | goto cleanup_return; | |
550 | } | |
3733e694 | 551 | buf = xmallocz(st.st_size); |
b44ebb19 LH |
552 | len = read_in_full(fd, buf, st.st_size); |
553 | close(fd); | |
a93bedad EE |
554 | if (len != st.st_size) { |
555 | error_code = READ_GITFILE_ERR_READ_FAILED; | |
556 | goto cleanup_return; | |
557 | } | |
a93bedad EE |
558 | if (!starts_with(buf, "gitdir: ")) { |
559 | error_code = READ_GITFILE_ERR_INVALID_FORMAT; | |
560 | goto cleanup_return; | |
561 | } | |
b44ebb19 LH |
562 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') |
563 | len--; | |
a93bedad EE |
564 | if (len < 9) { |
565 | error_code = READ_GITFILE_ERR_NO_PATH; | |
566 | goto cleanup_return; | |
567 | } | |
b44ebb19 | 568 | buf[len] = '\0'; |
40c813e0 BK |
569 | dir = buf + 8; |
570 | ||
571 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
572 | size_t pathlen = slash+1 - path; | |
75faa45a JK |
573 | dir = xstrfmt("%.*s%.*s", (int)pathlen, path, |
574 | (int)(len - 8), buf + 8); | |
40c813e0 BK |
575 | free(buf); |
576 | buf = dir; | |
577 | } | |
a93bedad EE |
578 | if (!is_git_directory(dir)) { |
579 | error_code = READ_GITFILE_ERR_NOT_A_REPO; | |
580 | goto cleanup_return; | |
581 | } | |
e2a57aac | 582 | path = real_path(dir); |
40c813e0 | 583 | |
a93bedad | 584 | cleanup_return: |
a93bedad EE |
585 | if (return_error_code) |
586 | *return_error_code = error_code; | |
5f29433f SB |
587 | else if (error_code) |
588 | read_gitfile_error_die(error_code, path, dir); | |
a93bedad | 589 | |
b44ebb19 | 590 | free(buf); |
38ae8784 | 591 | return error_code ? NULL : path; |
b44ebb19 LH |
592 | } |
593 | ||
e4e30347 | 594 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
7333ed17 | 595 | struct strbuf *cwd, |
b3f66fd3 | 596 | int *nongit_ok) |
e4e30347 | 597 | { |
b3f66fd3 NTND |
598 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
599 | const char *worktree; | |
600 | char *gitfile; | |
9b125da4 | 601 | int offset; |
e4e30347 JN |
602 | |
603 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
604 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
b3f66fd3 | 605 | |
13d6ec91 | 606 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
607 | if (gitfile) { |
608 | gitfile = xstrdup(gitfile); | |
609 | gitdirenv = gitfile; | |
610 | } | |
611 | ||
e4e30347 JN |
612 | if (!is_git_directory(gitdirenv)) { |
613 | if (nongit_ok) { | |
614 | *nongit_ok = 1; | |
b3f66fd3 | 615 | free(gitfile); |
e4e30347 JN |
616 | return NULL; |
617 | } | |
618 | die("Not a git repository: '%s'", gitdirenv); | |
619 | } | |
b3f66fd3 NTND |
620 | |
621 | if (check_repository_format_gently(gitdirenv, nongit_ok)) { | |
622 | free(gitfile); | |
623 | return NULL; | |
e4e30347 | 624 | } |
b3f66fd3 NTND |
625 | |
626 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
627 | if (work_tree_env) | |
628 | set_git_work_tree(work_tree_env); | |
629 | else if (is_bare_repository_cfg > 0) { | |
fada7674 JK |
630 | if (git_work_tree_cfg) { |
631 | /* #22.2, #30 */ | |
632 | warning("core.bare and core.worktree do not make sense"); | |
633 | work_tree_config_is_bogus = 1; | |
634 | } | |
b3f66fd3 NTND |
635 | |
636 | /* #18, #26 */ | |
637 | set_git_dir(gitdirenv); | |
638 | free(gitfile); | |
e4e30347 | 639 | return NULL; |
b3f66fd3 NTND |
640 | } |
641 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
642 | if (is_absolute_path(git_work_tree_cfg)) | |
643 | set_git_work_tree(git_work_tree_cfg); | |
644 | else { | |
56b9f6e7 | 645 | char *core_worktree; |
b3f66fd3 NTND |
646 | if (chdir(gitdirenv)) |
647 | die_errno("Could not chdir to '%s'", gitdirenv); | |
648 | if (chdir(git_work_tree_cfg)) | |
649 | die_errno("Could not chdir to '%s'", git_work_tree_cfg); | |
56b9f6e7 | 650 | core_worktree = xgetcwd(); |
7333ed17 | 651 | if (chdir(cwd->buf)) |
b3f66fd3 NTND |
652 | die_errno("Could not come back to cwd"); |
653 | set_git_work_tree(core_worktree); | |
56b9f6e7 | 654 | free(core_worktree); |
b3f66fd3 NTND |
655 | } |
656 | } | |
2cd83d10 JK |
657 | else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) { |
658 | /* #16d */ | |
659 | set_git_dir(gitdirenv); | |
660 | free(gitfile); | |
661 | return NULL; | |
662 | } | |
b3f66fd3 NTND |
663 | else /* #2, #10 */ |
664 | set_git_work_tree("."); | |
665 | ||
666 | /* set_git_work_tree() must have been called by now */ | |
667 | worktree = get_git_work_tree(); | |
668 | ||
669 | /* both get_git_work_tree() and cwd are already normalized */ | |
7333ed17 | 670 | if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */ |
b3f66fd3 NTND |
671 | set_git_dir(gitdirenv); |
672 | free(gitfile); | |
e4e30347 | 673 | return NULL; |
b3f66fd3 | 674 | } |
e4e30347 | 675 | |
7333ed17 | 676 | offset = dir_inside_of(cwd->buf, worktree); |
9b125da4 | 677 | if (offset >= 0) { /* cwd inside worktree? */ |
e2a57aac | 678 | set_git_dir(real_path(gitdirenv)); |
b3f66fd3 NTND |
679 | if (chdir(worktree)) |
680 | die_errno("Could not chdir to '%s'", worktree); | |
7333ed17 | 681 | strbuf_addch(cwd, '/'); |
b3f66fd3 | 682 | free(gitfile); |
7333ed17 | 683 | return cwd->buf + offset; |
93a00542 | 684 | } |
b3f66fd3 NTND |
685 | |
686 | /* cwd outside worktree */ | |
687 | set_git_dir(gitdirenv); | |
688 | free(gitfile); | |
689 | return NULL; | |
93a00542 JN |
690 | } |
691 | ||
9951d3b3 | 692 | static const char *setup_discovered_git_dir(const char *gitdir, |
7333ed17 | 693 | struct strbuf *cwd, int offset, |
9951d3b3 | 694 | int *nongit_ok) |
98937bef | 695 | { |
9951d3b3 NTND |
696 | if (check_repository_format_gently(gitdir, nongit_ok)) |
697 | return NULL; | |
98937bef | 698 | |
4868b2ea JN |
699 | /* --work-tree is set without --git-dir; use discovered one */ |
700 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
7333ed17 | 701 | if (offset != cwd->len && !is_absolute_path(gitdir)) |
ce83eadd | 702 | gitdir = real_pathdup(gitdir, 1); |
7333ed17 | 703 | if (chdir(cwd->buf)) |
4868b2ea | 704 | die_errno("Could not come back to cwd"); |
7333ed17 | 705 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
4868b2ea JN |
706 | } |
707 | ||
9951d3b3 NTND |
708 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
709 | if (is_bare_repository_cfg > 0) { | |
7333ed17 RS |
710 | set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir)); |
711 | if (chdir(cwd->buf)) | |
9951d3b3 | 712 | die_errno("Could not come back to cwd"); |
98937bef | 713 | return NULL; |
9951d3b3 | 714 | } |
98937bef | 715 | |
9951d3b3 NTND |
716 | /* #0, #1, #5, #8, #9, #12, #13 */ |
717 | set_git_work_tree("."); | |
718 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
719 | set_git_dir(gitdir); | |
98937bef | 720 | inside_git_dir = 0; |
9951d3b3 | 721 | inside_work_tree = 1; |
7333ed17 | 722 | if (offset == cwd->len) |
98937bef NTND |
723 | return NULL; |
724 | ||
df380d58 JS |
725 | /* Make "offset" point past the '/' (already the case for root dirs) */ |
726 | if (offset != offset_1st_component(cwd->buf)) | |
727 | offset++; | |
728 | /* Add a '/' at the end */ | |
7333ed17 RS |
729 | strbuf_addch(cwd, '/'); |
730 | return cwd->buf + offset; | |
98937bef NTND |
731 | } |
732 | ||
1cd8031b | 733 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
7333ed17 RS |
734 | static const char *setup_bare_git_dir(struct strbuf *cwd, int offset, |
735 | int *nongit_ok) | |
68698da5 JN |
736 | { |
737 | int root_len; | |
738 | ||
1cd8031b NTND |
739 | if (check_repository_format_gently(".", nongit_ok)) |
740 | return NULL; | |
741 | ||
2cd83d10 JK |
742 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
743 | ||
4868b2ea JN |
744 | /* --work-tree is set without --git-dir; use discovered one */ |
745 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
746 | const char *gitdir; | |
747 | ||
7333ed17 RS |
748 | gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset); |
749 | if (chdir(cwd->buf)) | |
4868b2ea | 750 | die_errno("Could not come back to cwd"); |
7333ed17 | 751 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
4868b2ea JN |
752 | } |
753 | ||
68698da5 | 754 | inside_git_dir = 1; |
1cd8031b | 755 | inside_work_tree = 0; |
7333ed17 RS |
756 | if (offset != cwd->len) { |
757 | if (chdir(cwd->buf)) | |
8fc0ae80 | 758 | die_errno("Cannot come back to cwd"); |
7333ed17 RS |
759 | root_len = offset_1st_component(cwd->buf); |
760 | strbuf_setlen(cwd, offset > root_len ? offset : root_len); | |
761 | set_git_dir(cwd->buf); | |
337e51ce | 762 | } |
1cd8031b | 763 | else |
68698da5 | 764 | set_git_dir("."); |
68698da5 JN |
765 | return NULL; |
766 | } | |
767 | ||
f161edeb JN |
768 | static const char *setup_nongit(const char *cwd, int *nongit_ok) |
769 | { | |
770 | if (!nongit_ok) | |
2ff30e67 | 771 | die(_("Not a git repository (or any of the parent directories): %s"), DEFAULT_GIT_DIR_ENVIRONMENT); |
f161edeb | 772 | if (chdir(cwd)) |
2ff30e67 | 773 | die_errno(_("Cannot come back to cwd")); |
f161edeb JN |
774 | *nongit_ok = 1; |
775 | return NULL; | |
776 | } | |
777 | ||
2565b43b | 778 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
60c98d1e JN |
779 | { |
780 | struct stat buf; | |
2565b43b CB |
781 | if (stat(path, &buf)) { |
782 | die_errno("failed to stat '%*s%s%s'", | |
783 | prefix_len, | |
60c98d1e JN |
784 | prefix ? prefix : "", |
785 | prefix ? "/" : "", path); | |
2565b43b | 786 | } |
60c98d1e JN |
787 | return buf.st_dev; |
788 | } | |
789 | ||
9e2326c7 | 790 | /* |
1b77d83c MH |
791 | * A "string_list_each_func_t" function that canonicalizes an entry |
792 | * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or | |
7ec30aaa MH |
793 | * discards it if unusable. The presence of an empty entry in |
794 | * GIT_CEILING_DIRECTORIES turns off canonicalization for all | |
795 | * subsequent entries. | |
9e2326c7 | 796 | */ |
1b77d83c | 797 | static int canonicalize_ceiling_entry(struct string_list_item *item, |
7ec30aaa | 798 | void *cb_data) |
9e2326c7 | 799 | { |
7ec30aaa | 800 | int *empty_entry_found = cb_data; |
1b77d83c | 801 | char *ceil = item->string; |
9e2326c7 | 802 | |
7ec30aaa MH |
803 | if (!*ceil) { |
804 | *empty_entry_found = 1; | |
9e2326c7 | 805 | return 0; |
7ec30aaa | 806 | } else if (!is_absolute_path(ceil)) { |
9e2326c7 | 807 | return 0; |
7ec30aaa MH |
808 | } else if (*empty_entry_found) { |
809 | /* Keep entry but do not canonicalize it */ | |
810 | return 1; | |
811 | } else { | |
ce83eadd | 812 | char *real_path = real_pathdup(ceil, 0); |
4ac9006f | 813 | if (!real_path) { |
7ec30aaa | 814 | return 0; |
4ac9006f | 815 | } |
7ec30aaa | 816 | free(item->string); |
4ac9006f | 817 | item->string = real_path; |
7ec30aaa MH |
818 | return 1; |
819 | } | |
9e2326c7 MH |
820 | } |
821 | ||
ce9b8aab JS |
822 | enum discovery_result { |
823 | GIT_DIR_NONE = 0, | |
824 | GIT_DIR_EXPLICIT, | |
825 | GIT_DIR_DISCOVERED, | |
826 | GIT_DIR_BARE, | |
827 | /* these are errors */ | |
828 | GIT_DIR_HIT_CEILING = -1, | |
01017dce JS |
829 | GIT_DIR_HIT_MOUNT_POINT = -2, |
830 | GIT_DIR_INVALID_GITFILE = -3 | |
ce9b8aab JS |
831 | }; |
832 | ||
e90fdc39 JS |
833 | /* |
834 | * We cannot decide in this function whether we are in the work tree or | |
835 | * not, since the config can only be read _after_ this function was called. | |
ce9b8aab JS |
836 | * |
837 | * Also, we avoid changing any global state (such as the current working | |
838 | * directory) to allow early callers. | |
839 | * | |
840 | * The directory where the search should start needs to be passed in via the | |
841 | * `dir` parameter; upon return, the `dir` buffer will contain the path of | |
842 | * the directory where the search ended, and `gitdir` will contain the path of | |
843 | * the discovered .git/ directory, if any. If `gitdir` is not absolute, it | |
844 | * is relative to `dir` (i.e. *not* necessarily the cwd). | |
e90fdc39 | 845 | */ |
ce9b8aab | 846 | static enum discovery_result setup_git_directory_gently_1(struct strbuf *dir, |
01017dce JS |
847 | struct strbuf *gitdir, |
848 | int die_on_error) | |
d288a700 | 849 | { |
0454dd93 | 850 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
31171d9e | 851 | struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; |
ce9b8aab JS |
852 | const char *gitdirenv; |
853 | int ceil_offset = -1, min_offset = has_dos_drive_prefix(dir->buf) ? 3 : 1; | |
c7d1d1b1 RH |
854 | dev_t current_device = 0; |
855 | int one_filesystem = 1; | |
d288a700 | 856 | |
e90fdc39 JS |
857 | /* |
858 | * If GIT_DIR is set explicitly, we're not going | |
859 | * to do any discovery, but we still do repository | |
860 | * validation. | |
861 | */ | |
ad1a382f | 862 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
ce9b8aab JS |
863 | if (gitdirenv) { |
864 | strbuf_addstr(gitdir, gitdirenv); | |
865 | return GIT_DIR_EXPLICIT; | |
866 | } | |
d288a700 | 867 | |
31171d9e | 868 | if (env_ceiling_dirs) { |
7ec30aaa MH |
869 | int empty_entry_found = 0; |
870 | ||
31171d9e | 871 | string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); |
1b77d83c | 872 | filter_string_list(&ceiling_dirs, 0, |
7ec30aaa | 873 | canonicalize_ceiling_entry, &empty_entry_found); |
ce9b8aab | 874 | ceil_offset = longest_ancestor_length(dir->buf, &ceiling_dirs); |
31171d9e MH |
875 | string_list_clear(&ceiling_dirs, 0); |
876 | } | |
877 | ||
ce9b8aab JS |
878 | if (ceil_offset < 0) |
879 | ceil_offset = min_offset - 2; | |
d288a700 | 880 | |
892c41b9 | 881 | /* |
ce9b8aab | 882 | * Test in the following order (relative to the dir): |
b44ebb19 | 883 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
884 | * - .git/ |
885 | * - ./ (bare) | |
b44ebb19 | 886 | * - ../.git |
e90fdc39 JS |
887 | * - ../.git/ |
888 | * - ../ (bare) | |
889 | * - ../../.git/ | |
890 | * etc. | |
892c41b9 | 891 | */ |
cf87463e | 892 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e | 893 | if (one_filesystem) |
ce9b8aab | 894 | current_device = get_device_or_die(dir->buf, NULL, 0); |
e90fdc39 | 895 | for (;;) { |
01017dce | 896 | int offset = dir->len, error_code = 0; |
ce9b8aab JS |
897 | |
898 | if (offset > min_offset) | |
899 | strbuf_addch(dir, '/'); | |
900 | strbuf_addstr(dir, DEFAULT_GIT_DIR_ENVIRONMENT); | |
01017dce JS |
901 | gitdirenv = read_gitfile_gently(dir->buf, die_on_error ? |
902 | NULL : &error_code); | |
903 | if (!gitdirenv) { | |
904 | if (die_on_error || | |
905 | error_code == READ_GITFILE_ERR_NOT_A_FILE) { | |
5c4003ca | 906 | /* NEEDSWORK: fail if .git is not file nor dir */ |
01017dce JS |
907 | if (is_git_directory(dir->buf)) |
908 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
909 | } else if (error_code != READ_GITFILE_ERR_STAT_FAILED) | |
910 | return GIT_DIR_INVALID_GITFILE; | |
9951d3b3 | 911 | } |
ce9b8aab | 912 | strbuf_setlen(dir, offset); |
9951d3b3 | 913 | if (gitdirenv) { |
ce9b8aab JS |
914 | strbuf_addstr(gitdir, gitdirenv); |
915 | return GIT_DIR_DISCOVERED; | |
9951d3b3 | 916 | } |
9951d3b3 | 917 | |
ce9b8aab JS |
918 | if (is_git_directory(dir->buf)) { |
919 | strbuf_addstr(gitdir, "."); | |
920 | return GIT_DIR_BARE; | |
502ffe34 | 921 | } |
9951d3b3 | 922 | |
ce9b8aab JS |
923 | if (offset <= min_offset) |
924 | return GIT_DIR_HIT_CEILING; | |
1cd8031b | 925 | |
ce9b8aab | 926 | while (--offset > ceil_offset && !is_dir_sep(dir->buf[offset])) |
6c1e6544 | 927 | ; /* continue */ |
ce9b8aab JS |
928 | if (offset <= ceil_offset) |
929 | return GIT_DIR_HIT_CEILING; | |
930 | ||
931 | strbuf_setlen(dir, offset > min_offset ? offset : min_offset); | |
932 | if (one_filesystem && | |
933 | current_device != get_device_or_die(dir->buf, NULL, offset)) | |
934 | return GIT_DIR_HIT_MOUNT_POINT; | |
892c41b9 | 935 | } |
d288a700 | 936 | } |
5e7bfe25 | 937 | |
16ac8b8d JS |
938 | const char *discover_git_directory(struct strbuf *gitdir) |
939 | { | |
940 | struct strbuf dir = STRBUF_INIT, err = STRBUF_INIT; | |
941 | size_t gitdir_offset = gitdir->len, cwd_len; | |
942 | struct repository_format candidate; | |
943 | ||
944 | if (strbuf_getcwd(&dir)) | |
945 | return NULL; | |
946 | ||
947 | cwd_len = dir.len; | |
01017dce | 948 | if (setup_git_directory_gently_1(&dir, gitdir, 0) <= 0) { |
16ac8b8d JS |
949 | strbuf_release(&dir); |
950 | return NULL; | |
951 | } | |
952 | ||
953 | /* | |
954 | * The returned gitdir is relative to dir, and if dir does not reflect | |
955 | * the current working directory, we simply make the gitdir absolute. | |
956 | */ | |
957 | if (dir.len < cwd_len && !is_absolute_path(gitdir->buf + gitdir_offset)) { | |
958 | /* Avoid a trailing "/." */ | |
959 | if (!strcmp(".", gitdir->buf + gitdir_offset)) | |
960 | strbuf_setlen(gitdir, gitdir_offset); | |
961 | else | |
962 | strbuf_addch(&dir, '/'); | |
963 | strbuf_insert(gitdir, gitdir_offset, dir.buf, dir.len); | |
964 | } | |
965 | ||
966 | strbuf_reset(&dir); | |
967 | strbuf_addf(&dir, "%s/config", gitdir->buf + gitdir_offset); | |
968 | read_repository_format(&candidate, dir.buf); | |
969 | strbuf_release(&dir); | |
970 | ||
971 | if (verify_repository_format(&candidate, &err) < 0) { | |
972 | warning("ignoring git dir '%s': %s", | |
973 | gitdir->buf + gitdir_offset, err.buf); | |
974 | strbuf_release(&err); | |
975 | return NULL; | |
976 | } | |
977 | ||
978 | return gitdir->buf + gitdir_offset; | |
979 | } | |
980 | ||
a60645f9 NTND |
981 | const char *setup_git_directory_gently(int *nongit_ok) |
982 | { | |
ce9b8aab JS |
983 | static struct strbuf cwd = STRBUF_INIT; |
984 | struct strbuf dir = STRBUF_INIT, gitdir = STRBUF_INIT; | |
a60645f9 NTND |
985 | const char *prefix; |
986 | ||
ce9b8aab JS |
987 | /* |
988 | * We may have read an incomplete configuration before | |
989 | * setting-up the git directory. If so, clear the cache so | |
990 | * that the next queries to the configuration reload complete | |
991 | * configuration (including the per-repo config file that we | |
992 | * ignored previously). | |
993 | */ | |
994 | git_config_clear(); | |
995 | ||
996 | /* | |
997 | * Let's assume that we are in a git repository. | |
998 | * If it turns out later that we are somewhere else, the value will be | |
999 | * updated accordingly. | |
1000 | */ | |
1001 | if (nongit_ok) | |
1002 | *nongit_ok = 0; | |
1003 | ||
1004 | if (strbuf_getcwd(&cwd)) | |
1005 | die_errno(_("Unable to read current working directory")); | |
1006 | strbuf_addbuf(&dir, &cwd); | |
1007 | ||
01017dce | 1008 | switch (setup_git_directory_gently_1(&dir, &gitdir, 1)) { |
ce9b8aab JS |
1009 | case GIT_DIR_NONE: |
1010 | prefix = NULL; | |
1011 | break; | |
1012 | case GIT_DIR_EXPLICIT: | |
1013 | prefix = setup_explicit_git_dir(gitdir.buf, &cwd, nongit_ok); | |
1014 | break; | |
1015 | case GIT_DIR_DISCOVERED: | |
1016 | if (dir.len < cwd.len && chdir(dir.buf)) | |
1017 | die(_("Cannot change to '%s'"), dir.buf); | |
1018 | prefix = setup_discovered_git_dir(gitdir.buf, &cwd, dir.len, | |
1019 | nongit_ok); | |
1020 | break; | |
1021 | case GIT_DIR_BARE: | |
1022 | if (dir.len < cwd.len && chdir(dir.buf)) | |
1023 | die(_("Cannot change to '%s'"), dir.buf); | |
1024 | prefix = setup_bare_git_dir(&cwd, dir.len, nongit_ok); | |
1025 | break; | |
1026 | case GIT_DIR_HIT_CEILING: | |
1027 | prefix = setup_nongit(cwd.buf, nongit_ok); | |
1028 | break; | |
1029 | case GIT_DIR_HIT_MOUNT_POINT: | |
1030 | if (nongit_ok) { | |
1031 | *nongit_ok = 1; | |
1032 | strbuf_release(&cwd); | |
1033 | strbuf_release(&dir); | |
1034 | return NULL; | |
1035 | } | |
1036 | die(_("Not a git repository (or any parent up to mount point %s)\n" | |
1037 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."), | |
1038 | dir.buf); | |
1039 | default: | |
1040 | die("BUG: unhandled setup_git_directory_1() result"); | |
1041 | } | |
1042 | ||
1f5d271f | 1043 | if (prefix) |
a6f7f9a3 | 1044 | setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1); |
1f5d271f | 1045 | else |
a6f7f9a3 | 1046 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); |
1f5d271f | 1047 | |
46c3cd44 JK |
1048 | startup_info->have_repository = !nongit_ok || !*nongit_ok; |
1049 | startup_info->prefix = prefix; | |
1050 | ||
ce9b8aab JS |
1051 | strbuf_release(&dir); |
1052 | strbuf_release(&gitdir); | |
1053 | ||
a60645f9 NTND |
1054 | return prefix; |
1055 | } | |
1056 | ||
94df2506 JH |
1057 | int git_config_perm(const char *var, const char *value) |
1058 | { | |
06cbe855 HO |
1059 | int i; |
1060 | char *endptr; | |
1061 | ||
1062 | if (value == NULL) | |
1063 | return PERM_GROUP; | |
1064 | ||
1065 | if (!strcmp(value, "umask")) | |
1066 | return PERM_UMASK; | |
1067 | if (!strcmp(value, "group")) | |
1068 | return PERM_GROUP; | |
1069 | if (!strcmp(value, "all") || | |
1070 | !strcmp(value, "world") || | |
1071 | !strcmp(value, "everybody")) | |
1072 | return PERM_EVERYBODY; | |
1073 | ||
1074 | /* Parse octal numbers */ | |
1075 | i = strtol(value, &endptr, 8); | |
1076 | ||
1077 | /* If not an octal number, maybe true/false? */ | |
1078 | if (*endptr != 0) | |
1079 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
1080 | ||
1081 | /* | |
1082 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 1083 | * a chmod value to restrict to. |
06cbe855 HO |
1084 | */ |
1085 | switch (i) { | |
1086 | case PERM_UMASK: /* 0 */ | |
1087 | return PERM_UMASK; | |
1088 | case OLD_PERM_GROUP: /* 1 */ | |
1089 | return PERM_GROUP; | |
1090 | case OLD_PERM_EVERYBODY: /* 2 */ | |
1091 | return PERM_EVERYBODY; | |
94df2506 | 1092 | } |
06cbe855 HO |
1093 | |
1094 | /* A filemode value was given: 0xxx */ | |
1095 | ||
1096 | if ((i & 0600) != 0600) | |
2ff30e67 | 1097 | die(_("Problem with core.sharedRepository filemode value " |
06cbe855 | 1098 | "(0%.3o).\nThe owner of files must always have " |
2ff30e67 | 1099 | "read and write permissions."), i); |
06cbe855 HO |
1100 | |
1101 | /* | |
1102 | * Mask filemode value. Others can not get write permission. | |
1103 | * x flags for directories are handled separately. | |
1104 | */ | |
5a688fe4 | 1105 | return -(i & 0666); |
94df2506 JH |
1106 | } |
1107 | ||
4b0d1eeb | 1108 | void check_repository_format(void) |
ab9cb76f | 1109 | { |
f1c126bd JK |
1110 | check_repository_format_gently(get_git_dir(), NULL); |
1111 | startup_info->have_repository = 1; | |
ab9cb76f JH |
1112 | } |
1113 | ||
e1e5ec86 CB |
1114 | /* |
1115 | * Returns the "prefix", a path to the current working directory | |
1116 | * relative to the work tree root, or NULL, if the current working | |
1117 | * directory is not a strict subdirectory of the work tree root. The | |
1118 | * prefix always ends with a '/' character. | |
1119 | */ | |
5e7bfe25 JH |
1120 | const char *setup_git_directory(void) |
1121 | { | |
b3f66fd3 | 1122 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 1123 | } |
abc06822 | 1124 | |
40d96325 | 1125 | const char *resolve_gitdir_gently(const char *suspect, int *return_error_code) |
abc06822 FG |
1126 | { |
1127 | if (is_git_directory(suspect)) | |
1128 | return suspect; | |
40d96325 | 1129 | return read_gitfile_gently(suspect, return_error_code); |
abc06822 | 1130 | } |
1d999ddd TR |
1131 | |
1132 | /* if any standard file descriptor is missing open it to /dev/null */ | |
1133 | void sanitize_stdfds(void) | |
1134 | { | |
1135 | int fd = open("/dev/null", O_RDWR, 0); | |
1136 | while (fd != -1 && fd < 2) | |
1137 | fd = dup(fd); | |
1138 | if (fd == -1) | |
1139 | die_errno("open /dev/null or dup failed"); | |
1140 | if (fd > 2) | |
1141 | close(fd); | |
1142 | } | |
de0957ce NTND |
1143 | |
1144 | int daemonize(void) | |
1145 | { | |
1146 | #ifdef NO_POSIX_GOODIES | |
1147 | errno = ENOSYS; | |
1148 | return -1; | |
1149 | #else | |
1150 | switch (fork()) { | |
1151 | case 0: | |
1152 | break; | |
1153 | case -1: | |
1154 | die_errno("fork failed"); | |
1155 | default: | |
1156 | exit(0); | |
1157 | } | |
1158 | if (setsid() == -1) | |
1159 | die_errno("setsid failed"); | |
1160 | close(0); | |
1161 | close(1); | |
1162 | close(2); | |
1163 | sanitize_stdfds(); | |
1164 | return 0; | |
1165 | #endif | |
1166 | } |