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Commit | Line | Data |
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d288a700 | 1 | #include "cache.h" |
c14c234f | 2 | #include "repository.h" |
b2141fc1 | 3 | #include "config.h" |
e90fdc39 | 4 | #include "dir.h" |
31171d9e | 5 | #include "string-list.h" |
8500e0de | 6 | #include "chdir-notify.h" |
60b7a92d | 7 | #include "promisor-remote.h" |
e90fdc39 JS |
8 | |
9 | static int inside_git_dir = -1; | |
10 | static int inside_work_tree = -1; | |
fada7674 | 11 | static int work_tree_config_is_bogus; |
d288a700 | 12 | |
46c3cd44 JK |
13 | static struct startup_info the_startup_info; |
14 | struct startup_info *startup_info = &the_startup_info; | |
15 | ||
ddc2a628 MEW |
16 | /* |
17 | * The input parameter must contain an absolute path, and it must already be | |
18 | * normalized. | |
19 | * | |
20 | * Find the part of an absolute path that lies inside the work tree by | |
21 | * dereferencing symlinks outside the work tree, for example: | |
22 | * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file | |
23 | * /dir/file (work tree is /) -> dir/file | |
24 | * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2 | |
25 | * /dir/repolink/file (repolink points to /dir/repo) -> file | |
26 | * /dir/repo (exactly equal to work tree) -> (empty string) | |
27 | */ | |
28 | static int abspath_part_inside_repo(char *path) | |
29 | { | |
30 | size_t len; | |
31 | size_t wtlen; | |
32 | char *path0; | |
33 | int off; | |
34 | const char *work_tree = get_git_work_tree(); | |
35 | ||
36 | if (!work_tree) | |
37 | return -1; | |
38 | wtlen = strlen(work_tree); | |
39 | len = strlen(path); | |
6127ff63 | 40 | off = offset_1st_component(path); |
ddc2a628 MEW |
41 | |
42 | /* check if work tree is already the prefix */ | |
d8727b36 | 43 | if (wtlen <= len && !fspathncmp(path, work_tree, wtlen)) { |
ddc2a628 MEW |
44 | if (path[wtlen] == '/') { |
45 | memmove(path, path + wtlen + 1, len - wtlen); | |
46 | return 0; | |
47 | } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') { | |
48 | /* work tree is the root, or the whole path */ | |
49 | memmove(path, path + wtlen, len - wtlen + 1); | |
50 | return 0; | |
51 | } | |
52 | /* work tree might match beginning of a symlink to work tree */ | |
53 | off = wtlen; | |
54 | } | |
55 | path0 = path; | |
6127ff63 | 56 | path += off; |
ddc2a628 MEW |
57 | |
58 | /* check each '/'-terminated level */ | |
59 | while (*path) { | |
60 | path++; | |
61 | if (*path == '/') { | |
62 | *path = '\0'; | |
d8727b36 | 63 | if (fspathcmp(real_path(path0), work_tree) == 0) { |
ddc2a628 MEW |
64 | memmove(path0, path + 1, len - (path - path0)); |
65 | return 0; | |
66 | } | |
67 | *path = '/'; | |
68 | } | |
69 | } | |
70 | ||
71 | /* check whole path */ | |
d8727b36 | 72 | if (fspathcmp(real_path(path0), work_tree) == 0) { |
ddc2a628 MEW |
73 | *path0 = '\0'; |
74 | return 0; | |
75 | } | |
76 | ||
77 | return -1; | |
78 | } | |
79 | ||
645a29c4 NTND |
80 | /* |
81 | * Normalize "path", prepending the "prefix" for relative paths. If | |
82 | * remaining_prefix is not NULL, return the actual prefix still | |
83 | * remains in the path. For example, prefix = sub1/sub2/ and path is | |
84 | * | |
85 | * foo -> sub1/sub2/foo (full prefix) | |
86 | * ../foo -> sub1/foo (remaining prefix is sub1/) | |
87 | * ../../bar -> bar (no remaining prefix) | |
88 | * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix) | |
89 | * `pwd`/../bar -> sub1/bar (no remaining prefix) | |
90 | */ | |
91 | char *prefix_path_gently(const char *prefix, int len, | |
92 | int *remaining_prefix, const char *path) | |
d089ebaa JH |
93 | { |
94 | const char *orig = path; | |
18e051a3 CMAB |
95 | char *sanitized; |
96 | if (is_absolute_path(orig)) { | |
3733e694 | 97 | sanitized = xmallocz(strlen(path)); |
645a29c4 NTND |
98 | if (remaining_prefix) |
99 | *remaining_prefix = 0; | |
655ee9ea MEW |
100 | if (normalize_path_copy_len(sanitized, path, remaining_prefix)) { |
101 | free(sanitized); | |
102 | return NULL; | |
103 | } | |
104 | if (abspath_part_inside_repo(sanitized)) { | |
105 | free(sanitized); | |
106 | return NULL; | |
107 | } | |
18e051a3 | 108 | } else { |
24041d6b | 109 | sanitized = xstrfmt("%.*s%s", len, len ? prefix : "", path); |
645a29c4 NTND |
110 | if (remaining_prefix) |
111 | *remaining_prefix = len; | |
655ee9ea | 112 | if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) { |
546e0fd9 JK |
113 | free(sanitized); |
114 | return NULL; | |
d089ebaa | 115 | } |
d089ebaa JH |
116 | } |
117 | return sanitized; | |
f332726e LT |
118 | } |
119 | ||
546e0fd9 JK |
120 | char *prefix_path(const char *prefix, int len, const char *path) |
121 | { | |
645a29c4 | 122 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 | 123 | if (!r) |
fc045fe7 | 124 | die(_("'%s' is outside repository"), path); |
546e0fd9 JK |
125 | return r; |
126 | } | |
127 | ||
128 | int path_inside_repo(const char *prefix, const char *path) | |
129 | { | |
130 | int len = prefix ? strlen(prefix) : 0; | |
645a29c4 | 131 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
132 | if (r) { |
133 | free(r); | |
134 | return 1; | |
135 | } | |
136 | return 0; | |
137 | } | |
138 | ||
c6e8c800 JH |
139 | int check_filename(const char *prefix, const char *arg) |
140 | { | |
e4da43b1 | 141 | char *to_free = NULL; |
c6e8c800 JH |
142 | struct stat st; |
143 | ||
d51c6ee0 JK |
144 | if (skip_prefix(arg, ":/", &arg)) { |
145 | if (!*arg) /* ":/" is root dir, always exists */ | |
4db86e8b | 146 | return 1; |
a08cbcda | 147 | prefix = NULL; |
42471bce JK |
148 | } else if (skip_prefix(arg, ":!", &arg) || |
149 | skip_prefix(arg, ":^", &arg)) { | |
150 | if (!*arg) /* excluding everything is silly, but allowed */ | |
151 | return 1; | |
a08cbcda JK |
152 | } |
153 | ||
154 | if (prefix) | |
155 | arg = to_free = prefix_filename(prefix, arg); | |
156 | ||
157 | if (!lstat(arg, &st)) { | |
e4da43b1 | 158 | free(to_free); |
c6e8c800 | 159 | return 1; /* file exists */ |
e4da43b1 | 160 | } |
93dd544f | 161 | if (is_missing_file_error(errno)) { |
e4da43b1 | 162 | free(to_free); |
c6e8c800 | 163 | return 0; /* file does not exist */ |
e4da43b1 | 164 | } |
fc045fe7 | 165 | die_errno(_("failed to stat '%s'"), arg); |
c6e8c800 JH |
166 | } |
167 | ||
e270f42c NTND |
168 | static void NORETURN die_verify_filename(struct repository *r, |
169 | const char *prefix, | |
023e37c3 MM |
170 | const char *arg, |
171 | int diagnose_misspelt_rev) | |
009fee47 | 172 | { |
023e37c3 | 173 | if (!diagnose_misspelt_rev) |
ab33a76e VA |
174 | die(_("%s: no such path in the working tree.\n" |
175 | "Use 'git <command> -- <path>...' to specify paths that do not exist locally."), | |
023e37c3 | 176 | arg); |
0e539dca JH |
177 | /* |
178 | * Saying "'(icase)foo' does not exist in the index" when the | |
179 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
180 | * begins with a colon and is followed by a non-alnum; do not | |
8c135ea2 | 181 | * let maybe_die_on_misspelt_object_name() even trigger. |
0e539dca JH |
182 | */ |
183 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
e270f42c | 184 | maybe_die_on_misspelt_object_name(r, arg, prefix); |
0e539dca | 185 | |
009fee47 | 186 | /* ... or fall back the most general message. */ |
ab33a76e VA |
187 | die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n" |
188 | "Use '--' to separate paths from revisions, like this:\n" | |
189 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
009fee47 MM |
190 | |
191 | } | |
192 | ||
c99eddd8 JK |
193 | /* |
194 | * Check for arguments that don't resolve as actual files, | |
195 | * but which look sufficiently like pathspecs that we'll consider | |
196 | * them such for the purposes of rev/pathspec DWIM parsing. | |
197 | */ | |
198 | static int looks_like_pathspec(const char *arg) | |
199 | { | |
200 | /* anything with a wildcard character */ | |
201 | if (!no_wildcard(arg)) | |
202 | return 1; | |
203 | ||
204 | /* long-form pathspec magic */ | |
205 | if (starts_with(arg, ":(")) | |
206 | return 1; | |
207 | ||
208 | return 0; | |
209 | } | |
210 | ||
e23d0b4a LT |
211 | /* |
212 | * Verify a filename that we got as an argument for a pathspec | |
213 | * entry. Note that a filename that begins with "-" never verifies | |
214 | * as true, because even if such a filename were to exist, we want | |
215 | * it to be preceded by the "--" marker (or we want the user to | |
216 | * use a format like "./-filename") | |
023e37c3 MM |
217 | * |
218 | * The "diagnose_misspelt_rev" is used to provide a user-friendly | |
219 | * diagnosis when dying upon finding that "name" is not a pathname. | |
220 | * If set to 1, the diagnosis will try to diagnose "name" as an | |
221 | * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis | |
222 | * will only complain about an inexisting file. | |
223 | * | |
224 | * This function is typically called to check that a "file or rev" | |
225 | * argument is unambiguous. In this case, the caller will want | |
226 | * diagnose_misspelt_rev == 1 when verifying the first non-rev | |
227 | * argument (which could have been a revision), and | |
228 | * diagnose_misspelt_rev == 0 for the next ones (because we already | |
229 | * saw a filename, there's not ambiguity anymore). | |
e23d0b4a | 230 | */ |
023e37c3 MM |
231 | void verify_filename(const char *prefix, |
232 | const char *arg, | |
233 | int diagnose_misspelt_rev) | |
e23d0b4a | 234 | { |
e23d0b4a | 235 | if (*arg == '-') |
fc045fe7 | 236 | die(_("option '%s' must come before non-option arguments"), arg); |
2cb47ab6 | 237 | if (looks_like_pathspec(arg) || check_filename(prefix, arg)) |
e23d0b4a | 238 | return; |
e270f42c | 239 | die_verify_filename(the_repository, prefix, arg, diagnose_misspelt_rev); |
e23d0b4a LT |
240 | } |
241 | ||
ea92f41f JH |
242 | /* |
243 | * Opposite of the above: the command line did not have -- marker | |
244 | * and we parsed the arg as a refname. It should not be interpretable | |
245 | * as a filename. | |
246 | */ | |
247 | void verify_non_filename(const char *prefix, const char *arg) | |
248 | { | |
7ae3df8c | 249 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 250 | return; |
ea92f41f JH |
251 | if (*arg == '-') |
252 | return; /* flag */ | |
c6e8c800 JH |
253 | if (!check_filename(prefix, arg)) |
254 | return; | |
ab33a76e VA |
255 | die(_("ambiguous argument '%s': both revision and filename\n" |
256 | "Use '--' to separate paths from revisions, like this:\n" | |
257 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
ea92f41f JH |
258 | } |
259 | ||
31e26ebc | 260 | int get_common_dir(struct strbuf *sb, const char *gitdir) |
11f9dd71 MK |
261 | { |
262 | const char *git_env_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT); | |
263 | if (git_env_common_dir) { | |
264 | strbuf_addstr(sb, git_env_common_dir); | |
265 | return 1; | |
266 | } else { | |
267 | return get_common_dir_noenv(sb, gitdir); | |
268 | } | |
269 | } | |
270 | ||
271 | int get_common_dir_noenv(struct strbuf *sb, const char *gitdir) | |
4dc4e145 NTND |
272 | { |
273 | struct strbuf data = STRBUF_INIT; | |
274 | struct strbuf path = STRBUF_INIT; | |
31e26ebc | 275 | int ret = 0; |
11f9dd71 | 276 | |
4dc4e145 NTND |
277 | strbuf_addf(&path, "%s/commondir", gitdir); |
278 | if (file_exists(path.buf)) { | |
279 | if (strbuf_read_file(&data, path.buf, 0) <= 0) | |
280 | die_errno(_("failed to read %s"), path.buf); | |
281 | while (data.len && (data.buf[data.len - 1] == '\n' || | |
282 | data.buf[data.len - 1] == '\r')) | |
283 | data.len--; | |
284 | data.buf[data.len] = '\0'; | |
285 | strbuf_reset(&path); | |
286 | if (!is_absolute_path(data.buf)) | |
287 | strbuf_addf(&path, "%s/", gitdir); | |
288 | strbuf_addbuf(&path, &data); | |
33ad9ddd | 289 | strbuf_add_real_path(sb, path.buf); |
31e26ebc | 290 | ret = 1; |
4ac9006f | 291 | } else { |
4dc4e145 | 292 | strbuf_addstr(sb, gitdir); |
4ac9006f BW |
293 | } |
294 | ||
4dc4e145 NTND |
295 | strbuf_release(&data); |
296 | strbuf_release(&path); | |
31e26ebc | 297 | return ret; |
4dc4e145 | 298 | } |
d288a700 | 299 | |
5f5608bc | 300 | /* |
ad1a382f | 301 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 302 | * We want to see: |
5f5608bc | 303 | * |
790296fd | 304 | * - either an objects/ directory _or_ the proper |
5f5608bc | 305 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 306 | * - a refs/ directory |
8098a178 | 307 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
308 | * a proper "ref:", or a regular file HEAD that has a properly |
309 | * formatted sha1 object name. | |
5f5608bc | 310 | */ |
b3256eb8 | 311 | int is_git_directory(const char *suspect) |
5f5608bc | 312 | { |
1d186b6f NTND |
313 | struct strbuf path = STRBUF_INIT; |
314 | int ret = 0; | |
315 | size_t len; | |
ad1a382f | 316 | |
4dc4e145 | 317 | /* Check worktree-related signatures */ |
fa4d8c78 JK |
318 | strbuf_addstr(&path, suspect); |
319 | strbuf_complete(&path, '/'); | |
320 | strbuf_addstr(&path, "HEAD"); | |
4dc4e145 NTND |
321 | if (validate_headref(path.buf)) |
322 | goto done; | |
323 | ||
324 | strbuf_reset(&path); | |
325 | get_common_dir(&path, suspect); | |
1d186b6f | 326 | len = path.len; |
4dc4e145 NTND |
327 | |
328 | /* Check non-worktree-related signatures */ | |
ad1a382f SP |
329 | if (getenv(DB_ENVIRONMENT)) { |
330 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
1d186b6f | 331 | goto done; |
ad1a382f SP |
332 | } |
333 | else { | |
4dc4e145 | 334 | strbuf_setlen(&path, len); |
1d186b6f NTND |
335 | strbuf_addstr(&path, "/objects"); |
336 | if (access(path.buf, X_OK)) | |
337 | goto done; | |
ad1a382f SP |
338 | } |
339 | ||
1d186b6f NTND |
340 | strbuf_setlen(&path, len); |
341 | strbuf_addstr(&path, "/refs"); | |
342 | if (access(path.buf, X_OK)) | |
343 | goto done; | |
ad1a382f | 344 | |
1d186b6f NTND |
345 | ret = 1; |
346 | done: | |
347 | strbuf_release(&path); | |
348 | return ret; | |
5f5608bc LT |
349 | } |
350 | ||
ffd036b1 JK |
351 | int is_nonbare_repository_dir(struct strbuf *path) |
352 | { | |
353 | int ret = 0; | |
354 | int gitfile_error; | |
355 | size_t orig_path_len = path->len; | |
356 | assert(orig_path_len != 0); | |
357 | strbuf_complete(path, '/'); | |
358 | strbuf_addstr(path, ".git"); | |
359 | if (read_gitfile_gently(path->buf, &gitfile_error) || is_git_directory(path->buf)) | |
360 | ret = 1; | |
361 | if (gitfile_error == READ_GITFILE_ERR_OPEN_FAILED || | |
362 | gitfile_error == READ_GITFILE_ERR_READ_FAILED) | |
363 | ret = 1; | |
364 | strbuf_setlen(path, orig_path_len); | |
365 | return ret; | |
366 | } | |
367 | ||
68025633 JS |
368 | int is_inside_git_dir(void) |
369 | { | |
e90fdc39 JS |
370 | if (inside_git_dir < 0) |
371 | inside_git_dir = is_inside_dir(get_git_dir()); | |
372 | return inside_git_dir; | |
892c41b9 ML |
373 | } |
374 | ||
892c41b9 ML |
375 | int is_inside_work_tree(void) |
376 | { | |
e90fdc39 JS |
377 | if (inside_work_tree < 0) |
378 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
379 | return inside_work_tree; | |
892c41b9 ML |
380 | } |
381 | ||
f3fa1838 JH |
382 | void setup_work_tree(void) |
383 | { | |
8500e0de | 384 | const char *work_tree; |
354e6534 JS |
385 | static int initialized = 0; |
386 | ||
387 | if (initialized) | |
388 | return; | |
fada7674 JK |
389 | |
390 | if (work_tree_config_is_bogus) | |
fc045fe7 | 391 | die(_("unable to set up work tree using invalid config")); |
fada7674 | 392 | |
354e6534 | 393 | work_tree = get_git_work_tree(); |
8500e0de | 394 | if (!work_tree || chdir_notify(work_tree)) |
fc045fe7 | 395 | die(_("this operation must be run in a work tree")); |
0ed74813 NTND |
396 | |
397 | /* | |
398 | * Make sure subsequent git processes find correct worktree | |
399 | * if $GIT_WORK_TREE is set relative | |
400 | */ | |
401 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
402 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
403 | ||
354e6534 | 404 | initialized = 1; |
59f0f2f3 MH |
405 | } |
406 | ||
58b284a2 NTND |
407 | static int read_worktree_config(const char *var, const char *value, void *vdata) |
408 | { | |
409 | struct repository_format *data = vdata; | |
410 | ||
411 | if (strcmp(var, "core.bare") == 0) { | |
412 | data->is_bare = git_config_bool(var, value); | |
413 | } else if (strcmp(var, "core.worktree") == 0) { | |
414 | if (!value) | |
415 | return config_error_nonbool(var); | |
13019979 | 416 | free(data->work_tree); |
58b284a2 NTND |
417 | data->work_tree = xstrdup(value); |
418 | } | |
419 | return 0; | |
420 | } | |
421 | ||
2cc7c2c7 | 422 | static int check_repo_format(const char *var, const char *value, void *vdata) |
31e26ebc | 423 | { |
2cc7c2c7 | 424 | struct repository_format *data = vdata; |
00a09d57 JK |
425 | const char *ext; |
426 | ||
31e26ebc | 427 | if (strcmp(var, "core.repositoryformatversion") == 0) |
2cc7c2c7 | 428 | data->version = git_config_int(var, value); |
00a09d57 JK |
429 | else if (skip_prefix(var, "extensions.", &ext)) { |
430 | /* | |
431 | * record any known extensions here; otherwise, | |
432 | * we fall through to recording it as unknown, and | |
433 | * check_repository_format will complain | |
434 | */ | |
435 | if (!strcmp(ext, "noop")) | |
436 | ; | |
067fbd41 | 437 | else if (!strcmp(ext, "preciousobjects")) |
2cc7c2c7 | 438 | data->precious_objects = git_config_bool(var, value); |
75b97fec JT |
439 | else if (!strcmp(ext, "partialclone")) { |
440 | if (!value) | |
441 | return config_error_nonbool(var); | |
442 | data->partial_clone = xstrdup(value); | |
58b284a2 NTND |
443 | } else if (!strcmp(ext, "worktreeconfig")) |
444 | data->worktree_config = git_config_bool(var, value); | |
445 | else | |
2cc7c2c7 | 446 | string_list_append(&data->unknown_extensions, ext); |
00a09d57 | 447 | } |
58b284a2 NTND |
448 | |
449 | return read_worktree_config(var, value, vdata); | |
31e26ebc NTND |
450 | } |
451 | ||
abade65b | 452 | static int check_repository_format_gently(const char *gitdir, struct repository_format *candidate, int *nongit_ok) |
9459aa77 | 453 | { |
7d0fb0da | 454 | struct strbuf sb = STRBUF_INIT; |
2cc7c2c7 | 455 | struct strbuf err = STRBUF_INIT; |
652f18ee | 456 | int has_common; |
00a09d57 | 457 | |
652f18ee | 458 | has_common = get_common_dir(&sb, gitdir); |
e61a509a | 459 | strbuf_addstr(&sb, "/config"); |
abade65b | 460 | read_repository_format(candidate, sb.buf); |
2cc7c2c7 | 461 | strbuf_release(&sb); |
e61a509a | 462 | |
337e51ce | 463 | /* |
2cc7c2c7 JK |
464 | * For historical use of check_repository_format() in git-init, |
465 | * we treat a missing config as a silent "ok", even when nongit_ok | |
466 | * is unset. | |
337e51ce | 467 | */ |
abade65b | 468 | if (candidate->version < 0) |
2cc7c2c7 JK |
469 | return 0; |
470 | ||
abade65b | 471 | if (verify_repository_format(candidate, &err) < 0) { |
2cc7c2c7 JK |
472 | if (nongit_ok) { |
473 | warning("%s", err.buf); | |
474 | strbuf_release(&err); | |
475 | *nongit_ok = -1; | |
476 | return -1; | |
477 | } | |
478 | die("%s", err.buf); | |
479 | } | |
480 | ||
abade65b | 481 | repository_format_precious_objects = candidate->precious_objects; |
60b7a92d | 482 | set_repository_format_partial_clone(candidate->partial_clone); |
58b284a2 | 483 | repository_format_worktree_config = candidate->worktree_config; |
abade65b | 484 | string_list_clear(&candidate->unknown_extensions, 0); |
58b284a2 NTND |
485 | |
486 | if (repository_format_worktree_config) { | |
487 | /* | |
488 | * pick up core.bare and core.worktree from per-worktree | |
489 | * config if present | |
490 | */ | |
491 | strbuf_addf(&sb, "%s/config.worktree", gitdir); | |
492 | git_config_from_file(read_worktree_config, sb.buf, candidate); | |
493 | strbuf_release(&sb); | |
494 | has_common = 0; | |
495 | } | |
496 | ||
652f18ee | 497 | if (!has_common) { |
abade65b | 498 | if (candidate->is_bare != -1) { |
499 | is_bare_repository_cfg = candidate->is_bare; | |
652f18ee JK |
500 | if (is_bare_repository_cfg == 1) |
501 | inside_work_tree = -1; | |
502 | } | |
abade65b | 503 | if (candidate->work_tree) { |
652f18ee | 504 | free(git_work_tree_cfg); |
e8805af1 | 505 | git_work_tree_cfg = xstrdup(candidate->work_tree); |
2cc7c2c7 | 506 | inside_work_tree = -1; |
652f18ee | 507 | } |
2cc7c2c7 JK |
508 | } |
509 | ||
510 | return 0; | |
511 | } | |
512 | ||
e8805af1 MÅ |
513 | static void init_repository_format(struct repository_format *format) |
514 | { | |
515 | const struct repository_format fresh = REPOSITORY_FORMAT_INIT; | |
516 | ||
517 | memcpy(format, &fresh, sizeof(fresh)); | |
518 | } | |
519 | ||
652f18ee | 520 | int read_repository_format(struct repository_format *format, const char *path) |
2cc7c2c7 | 521 | { |
e8805af1 | 522 | clear_repository_format(format); |
652f18ee | 523 | git_config_from_file(check_repo_format, path, format); |
e8805af1 MÅ |
524 | if (format->version == -1) |
525 | clear_repository_format(format); | |
2cc7c2c7 JK |
526 | return format->version; |
527 | } | |
528 | ||
e8805af1 MÅ |
529 | void clear_repository_format(struct repository_format *format) |
530 | { | |
531 | string_list_clear(&format->unknown_extensions, 0); | |
532 | free(format->work_tree); | |
533 | free(format->partial_clone); | |
534 | init_repository_format(format); | |
535 | } | |
536 | ||
2cc7c2c7 JK |
537 | int verify_repository_format(const struct repository_format *format, |
538 | struct strbuf *err) | |
539 | { | |
540 | if (GIT_REPO_VERSION_READ < format->version) { | |
274db840 | 541 | strbuf_addf(err, _("Expected git repo version <= %d, found %d"), |
2cc7c2c7 JK |
542 | GIT_REPO_VERSION_READ, format->version); |
543 | return -1; | |
544 | } | |
545 | ||
546 | if (format->version >= 1 && format->unknown_extensions.nr) { | |
00a09d57 JK |
547 | int i; |
548 | ||
274db840 | 549 | strbuf_addstr(err, _("unknown repository extensions found:")); |
00a09d57 | 550 | |
2cc7c2c7 JK |
551 | for (i = 0; i < format->unknown_extensions.nr; i++) |
552 | strbuf_addf(err, "\n\t%s", | |
553 | format->unknown_extensions.items[i].string); | |
554 | return -1; | |
00a09d57 JK |
555 | } |
556 | ||
2cc7c2c7 | 557 | return 0; |
9459aa77 NTND |
558 | } |
559 | ||
5f29433f SB |
560 | void read_gitfile_error_die(int error_code, const char *path, const char *dir) |
561 | { | |
562 | switch (error_code) { | |
563 | case READ_GITFILE_ERR_STAT_FAILED: | |
564 | case READ_GITFILE_ERR_NOT_A_FILE: | |
565 | /* non-fatal; follow return path */ | |
566 | break; | |
567 | case READ_GITFILE_ERR_OPEN_FAILED: | |
fc045fe7 | 568 | die_errno(_("error opening '%s'"), path); |
5f29433f | 569 | case READ_GITFILE_ERR_TOO_LARGE: |
fc045fe7 | 570 | die(_("too large to be a .git file: '%s'"), path); |
5f29433f | 571 | case READ_GITFILE_ERR_READ_FAILED: |
fc045fe7 | 572 | die(_("error reading %s"), path); |
5f29433f | 573 | case READ_GITFILE_ERR_INVALID_FORMAT: |
fc045fe7 | 574 | die(_("invalid gitfile format: %s"), path); |
5f29433f | 575 | case READ_GITFILE_ERR_NO_PATH: |
fc045fe7 | 576 | die(_("no path in gitfile: %s"), path); |
5f29433f | 577 | case READ_GITFILE_ERR_NOT_A_REPO: |
fc045fe7 | 578 | die(_("not a git repository: %s"), dir); |
5f29433f | 579 | default: |
033abf97 | 580 | BUG("unknown error code"); |
5f29433f SB |
581 | } |
582 | } | |
583 | ||
b44ebb19 LH |
584 | /* |
585 | * Try to read the location of the git directory from the .git file, | |
ea1d8756 HWN |
586 | * return path to git directory if found. The return value comes from |
587 | * a shared buffer. | |
a93bedad EE |
588 | * |
589 | * On failure, if return_error_code is not NULL, return_error_code | |
590 | * will be set to an error code and NULL will be returned. If | |
591 | * return_error_code is NULL the function will die instead (for most | |
592 | * cases). | |
b44ebb19 | 593 | */ |
a93bedad | 594 | const char *read_gitfile_gently(const char *path, int *return_error_code) |
b44ebb19 | 595 | { |
921bdd96 | 596 | const int max_file_size = 1 << 20; /* 1MB */ |
a93bedad EE |
597 | int error_code = 0; |
598 | char *buf = NULL; | |
599 | char *dir = NULL; | |
40c813e0 | 600 | const char *slash; |
b44ebb19 LH |
601 | struct stat st; |
602 | int fd; | |
b1905aea | 603 | ssize_t len; |
b44ebb19 | 604 | |
a93bedad | 605 | if (stat(path, &st)) { |
5c4003ca | 606 | /* NEEDSWORK: discern between ENOENT vs other errors */ |
a93bedad EE |
607 | error_code = READ_GITFILE_ERR_STAT_FAILED; |
608 | goto cleanup_return; | |
609 | } | |
610 | if (!S_ISREG(st.st_mode)) { | |
611 | error_code = READ_GITFILE_ERR_NOT_A_FILE; | |
612 | goto cleanup_return; | |
613 | } | |
921bdd96 EE |
614 | if (st.st_size > max_file_size) { |
615 | error_code = READ_GITFILE_ERR_TOO_LARGE; | |
616 | goto cleanup_return; | |
617 | } | |
b44ebb19 | 618 | fd = open(path, O_RDONLY); |
a93bedad EE |
619 | if (fd < 0) { |
620 | error_code = READ_GITFILE_ERR_OPEN_FAILED; | |
621 | goto cleanup_return; | |
622 | } | |
3733e694 | 623 | buf = xmallocz(st.st_size); |
b44ebb19 LH |
624 | len = read_in_full(fd, buf, st.st_size); |
625 | close(fd); | |
a93bedad EE |
626 | if (len != st.st_size) { |
627 | error_code = READ_GITFILE_ERR_READ_FAILED; | |
628 | goto cleanup_return; | |
629 | } | |
a93bedad EE |
630 | if (!starts_with(buf, "gitdir: ")) { |
631 | error_code = READ_GITFILE_ERR_INVALID_FORMAT; | |
632 | goto cleanup_return; | |
633 | } | |
b44ebb19 LH |
634 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') |
635 | len--; | |
a93bedad EE |
636 | if (len < 9) { |
637 | error_code = READ_GITFILE_ERR_NO_PATH; | |
638 | goto cleanup_return; | |
639 | } | |
b44ebb19 | 640 | buf[len] = '\0'; |
40c813e0 BK |
641 | dir = buf + 8; |
642 | ||
643 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
644 | size_t pathlen = slash+1 - path; | |
75faa45a JK |
645 | dir = xstrfmt("%.*s%.*s", (int)pathlen, path, |
646 | (int)(len - 8), buf + 8); | |
40c813e0 BK |
647 | free(buf); |
648 | buf = dir; | |
649 | } | |
a93bedad EE |
650 | if (!is_git_directory(dir)) { |
651 | error_code = READ_GITFILE_ERR_NOT_A_REPO; | |
652 | goto cleanup_return; | |
653 | } | |
e2a57aac | 654 | path = real_path(dir); |
40c813e0 | 655 | |
a93bedad | 656 | cleanup_return: |
a93bedad EE |
657 | if (return_error_code) |
658 | *return_error_code = error_code; | |
5f29433f SB |
659 | else if (error_code) |
660 | read_gitfile_error_die(error_code, path, dir); | |
a93bedad | 661 | |
b44ebb19 | 662 | free(buf); |
38ae8784 | 663 | return error_code ? NULL : path; |
b44ebb19 LH |
664 | } |
665 | ||
e4e30347 | 666 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
7333ed17 | 667 | struct strbuf *cwd, |
abade65b | 668 | struct repository_format *repo_fmt, |
b3f66fd3 | 669 | int *nongit_ok) |
e4e30347 | 670 | { |
b3f66fd3 NTND |
671 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
672 | const char *worktree; | |
673 | char *gitfile; | |
9b125da4 | 674 | int offset; |
e4e30347 JN |
675 | |
676 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
fc045fe7 | 677 | die(_("'$%s' too big"), GIT_DIR_ENVIRONMENT); |
b3f66fd3 | 678 | |
13d6ec91 | 679 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
680 | if (gitfile) { |
681 | gitfile = xstrdup(gitfile); | |
682 | gitdirenv = gitfile; | |
683 | } | |
684 | ||
e4e30347 JN |
685 | if (!is_git_directory(gitdirenv)) { |
686 | if (nongit_ok) { | |
687 | *nongit_ok = 1; | |
b3f66fd3 | 688 | free(gitfile); |
e4e30347 JN |
689 | return NULL; |
690 | } | |
fc045fe7 | 691 | die(_("not a git repository: '%s'"), gitdirenv); |
e4e30347 | 692 | } |
b3f66fd3 | 693 | |
abade65b | 694 | if (check_repository_format_gently(gitdirenv, repo_fmt, nongit_ok)) { |
b3f66fd3 NTND |
695 | free(gitfile); |
696 | return NULL; | |
e4e30347 | 697 | } |
b3f66fd3 NTND |
698 | |
699 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
700 | if (work_tree_env) | |
701 | set_git_work_tree(work_tree_env); | |
702 | else if (is_bare_repository_cfg > 0) { | |
fada7674 JK |
703 | if (git_work_tree_cfg) { |
704 | /* #22.2, #30 */ | |
705 | warning("core.bare and core.worktree do not make sense"); | |
706 | work_tree_config_is_bogus = 1; | |
707 | } | |
b3f66fd3 NTND |
708 | |
709 | /* #18, #26 */ | |
710 | set_git_dir(gitdirenv); | |
711 | free(gitfile); | |
e4e30347 | 712 | return NULL; |
b3f66fd3 NTND |
713 | } |
714 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
715 | if (is_absolute_path(git_work_tree_cfg)) | |
716 | set_git_work_tree(git_work_tree_cfg); | |
717 | else { | |
56b9f6e7 | 718 | char *core_worktree; |
b3f66fd3 | 719 | if (chdir(gitdirenv)) |
fc045fe7 | 720 | die_errno(_("cannot chdir to '%s'"), gitdirenv); |
b3f66fd3 | 721 | if (chdir(git_work_tree_cfg)) |
fc045fe7 | 722 | die_errno(_("cannot chdir to '%s'"), git_work_tree_cfg); |
56b9f6e7 | 723 | core_worktree = xgetcwd(); |
7333ed17 | 724 | if (chdir(cwd->buf)) |
fc045fe7 | 725 | die_errno(_("cannot come back to cwd")); |
b3f66fd3 | 726 | set_git_work_tree(core_worktree); |
56b9f6e7 | 727 | free(core_worktree); |
b3f66fd3 NTND |
728 | } |
729 | } | |
2cd83d10 JK |
730 | else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) { |
731 | /* #16d */ | |
732 | set_git_dir(gitdirenv); | |
733 | free(gitfile); | |
734 | return NULL; | |
735 | } | |
b3f66fd3 NTND |
736 | else /* #2, #10 */ |
737 | set_git_work_tree("."); | |
738 | ||
739 | /* set_git_work_tree() must have been called by now */ | |
740 | worktree = get_git_work_tree(); | |
741 | ||
742 | /* both get_git_work_tree() and cwd are already normalized */ | |
7333ed17 | 743 | if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */ |
b3f66fd3 NTND |
744 | set_git_dir(gitdirenv); |
745 | free(gitfile); | |
e4e30347 | 746 | return NULL; |
b3f66fd3 | 747 | } |
e4e30347 | 748 | |
7333ed17 | 749 | offset = dir_inside_of(cwd->buf, worktree); |
9b125da4 | 750 | if (offset >= 0) { /* cwd inside worktree? */ |
e2a57aac | 751 | set_git_dir(real_path(gitdirenv)); |
b3f66fd3 | 752 | if (chdir(worktree)) |
fc045fe7 | 753 | die_errno(_("cannot chdir to '%s'"), worktree); |
7333ed17 | 754 | strbuf_addch(cwd, '/'); |
b3f66fd3 | 755 | free(gitfile); |
7333ed17 | 756 | return cwd->buf + offset; |
93a00542 | 757 | } |
b3f66fd3 NTND |
758 | |
759 | /* cwd outside worktree */ | |
760 | set_git_dir(gitdirenv); | |
761 | free(gitfile); | |
762 | return NULL; | |
93a00542 JN |
763 | } |
764 | ||
9951d3b3 | 765 | static const char *setup_discovered_git_dir(const char *gitdir, |
7333ed17 | 766 | struct strbuf *cwd, int offset, |
abade65b | 767 | struct repository_format *repo_fmt, |
9951d3b3 | 768 | int *nongit_ok) |
98937bef | 769 | { |
abade65b | 770 | if (check_repository_format_gently(gitdir, repo_fmt, nongit_ok)) |
9951d3b3 | 771 | return NULL; |
98937bef | 772 | |
4868b2ea JN |
773 | /* --work-tree is set without --git-dir; use discovered one */ |
774 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
2d4dcf21 JS |
775 | char *to_free = NULL; |
776 | const char *ret; | |
777 | ||
7333ed17 | 778 | if (offset != cwd->len && !is_absolute_path(gitdir)) |
2d4dcf21 | 779 | gitdir = to_free = real_pathdup(gitdir, 1); |
7333ed17 | 780 | if (chdir(cwd->buf)) |
fc045fe7 | 781 | die_errno(_("cannot come back to cwd")); |
abade65b | 782 | ret = setup_explicit_git_dir(gitdir, cwd, repo_fmt, nongit_ok); |
2d4dcf21 JS |
783 | free(to_free); |
784 | return ret; | |
4868b2ea JN |
785 | } |
786 | ||
9951d3b3 NTND |
787 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
788 | if (is_bare_repository_cfg > 0) { | |
7333ed17 RS |
789 | set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir)); |
790 | if (chdir(cwd->buf)) | |
fc045fe7 | 791 | die_errno(_("cannot come back to cwd")); |
98937bef | 792 | return NULL; |
9951d3b3 | 793 | } |
98937bef | 794 | |
9951d3b3 NTND |
795 | /* #0, #1, #5, #8, #9, #12, #13 */ |
796 | set_git_work_tree("."); | |
797 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
798 | set_git_dir(gitdir); | |
98937bef | 799 | inside_git_dir = 0; |
9951d3b3 | 800 | inside_work_tree = 1; |
5cf7b3b1 | 801 | if (offset >= cwd->len) |
98937bef NTND |
802 | return NULL; |
803 | ||
df380d58 JS |
804 | /* Make "offset" point past the '/' (already the case for root dirs) */ |
805 | if (offset != offset_1st_component(cwd->buf)) | |
806 | offset++; | |
807 | /* Add a '/' at the end */ | |
7333ed17 RS |
808 | strbuf_addch(cwd, '/'); |
809 | return cwd->buf + offset; | |
98937bef NTND |
810 | } |
811 | ||
1cd8031b | 812 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
7333ed17 | 813 | static const char *setup_bare_git_dir(struct strbuf *cwd, int offset, |
abade65b | 814 | struct repository_format *repo_fmt, |
7333ed17 | 815 | int *nongit_ok) |
68698da5 JN |
816 | { |
817 | int root_len; | |
818 | ||
abade65b | 819 | if (check_repository_format_gently(".", repo_fmt, nongit_ok)) |
1cd8031b NTND |
820 | return NULL; |
821 | ||
2cd83d10 JK |
822 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
823 | ||
4868b2ea JN |
824 | /* --work-tree is set without --git-dir; use discovered one */ |
825 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
da6f8475 | 826 | static const char *gitdir; |
4868b2ea | 827 | |
7333ed17 RS |
828 | gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset); |
829 | if (chdir(cwd->buf)) | |
fc045fe7 | 830 | die_errno(_("cannot come back to cwd")); |
abade65b | 831 | return setup_explicit_git_dir(gitdir, cwd, repo_fmt, nongit_ok); |
4868b2ea JN |
832 | } |
833 | ||
68698da5 | 834 | inside_git_dir = 1; |
1cd8031b | 835 | inside_work_tree = 0; |
7333ed17 RS |
836 | if (offset != cwd->len) { |
837 | if (chdir(cwd->buf)) | |
fc045fe7 | 838 | die_errno(_("cannot come back to cwd")); |
7333ed17 RS |
839 | root_len = offset_1st_component(cwd->buf); |
840 | strbuf_setlen(cwd, offset > root_len ? offset : root_len); | |
841 | set_git_dir(cwd->buf); | |
337e51ce | 842 | } |
1cd8031b | 843 | else |
68698da5 | 844 | set_git_dir("."); |
68698da5 JN |
845 | return NULL; |
846 | } | |
847 | ||
2565b43b | 848 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
60c98d1e JN |
849 | { |
850 | struct stat buf; | |
2565b43b | 851 | if (stat(path, &buf)) { |
fc045fe7 | 852 | die_errno(_("failed to stat '%*s%s%s'"), |
2565b43b | 853 | prefix_len, |
60c98d1e JN |
854 | prefix ? prefix : "", |
855 | prefix ? "/" : "", path); | |
2565b43b | 856 | } |
60c98d1e JN |
857 | return buf.st_dev; |
858 | } | |
859 | ||
9e2326c7 | 860 | /* |
1b77d83c MH |
861 | * A "string_list_each_func_t" function that canonicalizes an entry |
862 | * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or | |
7ec30aaa MH |
863 | * discards it if unusable. The presence of an empty entry in |
864 | * GIT_CEILING_DIRECTORIES turns off canonicalization for all | |
865 | * subsequent entries. | |
9e2326c7 | 866 | */ |
1b77d83c | 867 | static int canonicalize_ceiling_entry(struct string_list_item *item, |
7ec30aaa | 868 | void *cb_data) |
9e2326c7 | 869 | { |
7ec30aaa | 870 | int *empty_entry_found = cb_data; |
1b77d83c | 871 | char *ceil = item->string; |
9e2326c7 | 872 | |
7ec30aaa MH |
873 | if (!*ceil) { |
874 | *empty_entry_found = 1; | |
9e2326c7 | 875 | return 0; |
7ec30aaa | 876 | } else if (!is_absolute_path(ceil)) { |
9e2326c7 | 877 | return 0; |
7ec30aaa MH |
878 | } else if (*empty_entry_found) { |
879 | /* Keep entry but do not canonicalize it */ | |
880 | return 1; | |
881 | } else { | |
ce83eadd | 882 | char *real_path = real_pathdup(ceil, 0); |
4ac9006f | 883 | if (!real_path) { |
7ec30aaa | 884 | return 0; |
4ac9006f | 885 | } |
7ec30aaa | 886 | free(item->string); |
4ac9006f | 887 | item->string = real_path; |
7ec30aaa MH |
888 | return 1; |
889 | } | |
9e2326c7 MH |
890 | } |
891 | ||
ce9b8aab JS |
892 | enum discovery_result { |
893 | GIT_DIR_NONE = 0, | |
894 | GIT_DIR_EXPLICIT, | |
895 | GIT_DIR_DISCOVERED, | |
896 | GIT_DIR_BARE, | |
897 | /* these are errors */ | |
898 | GIT_DIR_HIT_CEILING = -1, | |
01017dce JS |
899 | GIT_DIR_HIT_MOUNT_POINT = -2, |
900 | GIT_DIR_INVALID_GITFILE = -3 | |
ce9b8aab JS |
901 | }; |
902 | ||
e90fdc39 JS |
903 | /* |
904 | * We cannot decide in this function whether we are in the work tree or | |
905 | * not, since the config can only be read _after_ this function was called. | |
ce9b8aab JS |
906 | * |
907 | * Also, we avoid changing any global state (such as the current working | |
908 | * directory) to allow early callers. | |
909 | * | |
910 | * The directory where the search should start needs to be passed in via the | |
911 | * `dir` parameter; upon return, the `dir` buffer will contain the path of | |
912 | * the directory where the search ended, and `gitdir` will contain the path of | |
913 | * the discovered .git/ directory, if any. If `gitdir` is not absolute, it | |
914 | * is relative to `dir` (i.e. *not* necessarily the cwd). | |
e90fdc39 | 915 | */ |
ce9b8aab | 916 | static enum discovery_result setup_git_directory_gently_1(struct strbuf *dir, |
01017dce JS |
917 | struct strbuf *gitdir, |
918 | int die_on_error) | |
d288a700 | 919 | { |
0454dd93 | 920 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
31171d9e | 921 | struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; |
ce9b8aab | 922 | const char *gitdirenv; |
d17f2124 | 923 | int ceil_offset = -1, min_offset = offset_1st_component(dir->buf); |
c7d1d1b1 RH |
924 | dev_t current_device = 0; |
925 | int one_filesystem = 1; | |
d288a700 | 926 | |
e90fdc39 JS |
927 | /* |
928 | * If GIT_DIR is set explicitly, we're not going | |
929 | * to do any discovery, but we still do repository | |
930 | * validation. | |
931 | */ | |
ad1a382f | 932 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
ce9b8aab JS |
933 | if (gitdirenv) { |
934 | strbuf_addstr(gitdir, gitdirenv); | |
935 | return GIT_DIR_EXPLICIT; | |
936 | } | |
d288a700 | 937 | |
31171d9e | 938 | if (env_ceiling_dirs) { |
7ec30aaa MH |
939 | int empty_entry_found = 0; |
940 | ||
31171d9e | 941 | string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); |
1b77d83c | 942 | filter_string_list(&ceiling_dirs, 0, |
7ec30aaa | 943 | canonicalize_ceiling_entry, &empty_entry_found); |
ce9b8aab | 944 | ceil_offset = longest_ancestor_length(dir->buf, &ceiling_dirs); |
31171d9e MH |
945 | string_list_clear(&ceiling_dirs, 0); |
946 | } | |
947 | ||
ce9b8aab JS |
948 | if (ceil_offset < 0) |
949 | ceil_offset = min_offset - 2; | |
d288a700 | 950 | |
e2683d51 JS |
951 | if (min_offset && min_offset == dir->len && |
952 | !is_dir_sep(dir->buf[min_offset - 1])) { | |
953 | strbuf_addch(dir, '/'); | |
954 | min_offset++; | |
955 | } | |
956 | ||
892c41b9 | 957 | /* |
ce9b8aab | 958 | * Test in the following order (relative to the dir): |
b44ebb19 | 959 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
960 | * - .git/ |
961 | * - ./ (bare) | |
b44ebb19 | 962 | * - ../.git |
e90fdc39 JS |
963 | * - ../.git/ |
964 | * - ../ (bare) | |
176b2d32 | 965 | * - ../../.git |
e90fdc39 | 966 | * etc. |
892c41b9 | 967 | */ |
cf87463e | 968 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e | 969 | if (one_filesystem) |
ce9b8aab | 970 | current_device = get_device_or_die(dir->buf, NULL, 0); |
e90fdc39 | 971 | for (;;) { |
01017dce | 972 | int offset = dir->len, error_code = 0; |
ce9b8aab JS |
973 | |
974 | if (offset > min_offset) | |
975 | strbuf_addch(dir, '/'); | |
976 | strbuf_addstr(dir, DEFAULT_GIT_DIR_ENVIRONMENT); | |
01017dce JS |
977 | gitdirenv = read_gitfile_gently(dir->buf, die_on_error ? |
978 | NULL : &error_code); | |
979 | if (!gitdirenv) { | |
980 | if (die_on_error || | |
981 | error_code == READ_GITFILE_ERR_NOT_A_FILE) { | |
5c4003ca | 982 | /* NEEDSWORK: fail if .git is not file nor dir */ |
01017dce JS |
983 | if (is_git_directory(dir->buf)) |
984 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
985 | } else if (error_code != READ_GITFILE_ERR_STAT_FAILED) | |
986 | return GIT_DIR_INVALID_GITFILE; | |
9951d3b3 | 987 | } |
ce9b8aab | 988 | strbuf_setlen(dir, offset); |
9951d3b3 | 989 | if (gitdirenv) { |
ce9b8aab JS |
990 | strbuf_addstr(gitdir, gitdirenv); |
991 | return GIT_DIR_DISCOVERED; | |
9951d3b3 | 992 | } |
9951d3b3 | 993 | |
ce9b8aab JS |
994 | if (is_git_directory(dir->buf)) { |
995 | strbuf_addstr(gitdir, "."); | |
996 | return GIT_DIR_BARE; | |
502ffe34 | 997 | } |
9951d3b3 | 998 | |
ce9b8aab JS |
999 | if (offset <= min_offset) |
1000 | return GIT_DIR_HIT_CEILING; | |
1cd8031b | 1001 | |
ce9b8aab | 1002 | while (--offset > ceil_offset && !is_dir_sep(dir->buf[offset])) |
6c1e6544 | 1003 | ; /* continue */ |
ce9b8aab JS |
1004 | if (offset <= ceil_offset) |
1005 | return GIT_DIR_HIT_CEILING; | |
1006 | ||
1007 | strbuf_setlen(dir, offset > min_offset ? offset : min_offset); | |
1008 | if (one_filesystem && | |
1009 | current_device != get_device_or_die(dir->buf, NULL, offset)) | |
1010 | return GIT_DIR_HIT_MOUNT_POINT; | |
892c41b9 | 1011 | } |
d288a700 | 1012 | } |
5e7bfe25 | 1013 | |
d3fb71b3 BW |
1014 | int discover_git_directory(struct strbuf *commondir, |
1015 | struct strbuf *gitdir) | |
16ac8b8d JS |
1016 | { |
1017 | struct strbuf dir = STRBUF_INIT, err = STRBUF_INIT; | |
1018 | size_t gitdir_offset = gitdir->len, cwd_len; | |
d3fb71b3 | 1019 | size_t commondir_offset = commondir->len; |
e8805af1 | 1020 | struct repository_format candidate = REPOSITORY_FORMAT_INIT; |
16ac8b8d JS |
1021 | |
1022 | if (strbuf_getcwd(&dir)) | |
d3fb71b3 | 1023 | return -1; |
16ac8b8d JS |
1024 | |
1025 | cwd_len = dir.len; | |
01017dce | 1026 | if (setup_git_directory_gently_1(&dir, gitdir, 0) <= 0) { |
16ac8b8d | 1027 | strbuf_release(&dir); |
d3fb71b3 | 1028 | return -1; |
16ac8b8d JS |
1029 | } |
1030 | ||
1031 | /* | |
1032 | * The returned gitdir is relative to dir, and if dir does not reflect | |
1033 | * the current working directory, we simply make the gitdir absolute. | |
1034 | */ | |
1035 | if (dir.len < cwd_len && !is_absolute_path(gitdir->buf + gitdir_offset)) { | |
1036 | /* Avoid a trailing "/." */ | |
1037 | if (!strcmp(".", gitdir->buf + gitdir_offset)) | |
1038 | strbuf_setlen(gitdir, gitdir_offset); | |
1039 | else | |
1040 | strbuf_addch(&dir, '/'); | |
1041 | strbuf_insert(gitdir, gitdir_offset, dir.buf, dir.len); | |
1042 | } | |
1043 | ||
d3fb71b3 BW |
1044 | get_common_dir(commondir, gitdir->buf + gitdir_offset); |
1045 | ||
16ac8b8d | 1046 | strbuf_reset(&dir); |
d3fb71b3 | 1047 | strbuf_addf(&dir, "%s/config", commondir->buf + commondir_offset); |
16ac8b8d JS |
1048 | read_repository_format(&candidate, dir.buf); |
1049 | strbuf_release(&dir); | |
1050 | ||
1051 | if (verify_repository_format(&candidate, &err) < 0) { | |
1052 | warning("ignoring git dir '%s': %s", | |
1053 | gitdir->buf + gitdir_offset, err.buf); | |
1054 | strbuf_release(&err); | |
d3fb71b3 | 1055 | strbuf_setlen(commondir, commondir_offset); |
69743f9b | 1056 | strbuf_setlen(gitdir, gitdir_offset); |
e8805af1 | 1057 | clear_repository_format(&candidate); |
d3fb71b3 | 1058 | return -1; |
16ac8b8d JS |
1059 | } |
1060 | ||
e8805af1 | 1061 | clear_repository_format(&candidate); |
d3fb71b3 | 1062 | return 0; |
16ac8b8d JS |
1063 | } |
1064 | ||
a60645f9 NTND |
1065 | const char *setup_git_directory_gently(int *nongit_ok) |
1066 | { | |
ce9b8aab JS |
1067 | static struct strbuf cwd = STRBUF_INIT; |
1068 | struct strbuf dir = STRBUF_INIT, gitdir = STRBUF_INIT; | |
07098b81 | 1069 | const char *prefix = NULL; |
e8805af1 | 1070 | struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT; |
a60645f9 | 1071 | |
ce9b8aab JS |
1072 | /* |
1073 | * We may have read an incomplete configuration before | |
1074 | * setting-up the git directory. If so, clear the cache so | |
1075 | * that the next queries to the configuration reload complete | |
1076 | * configuration (including the per-repo config file that we | |
1077 | * ignored previously). | |
1078 | */ | |
1079 | git_config_clear(); | |
1080 | ||
1081 | /* | |
1082 | * Let's assume that we are in a git repository. | |
1083 | * If it turns out later that we are somewhere else, the value will be | |
1084 | * updated accordingly. | |
1085 | */ | |
1086 | if (nongit_ok) | |
1087 | *nongit_ok = 0; | |
1088 | ||
1089 | if (strbuf_getcwd(&cwd)) | |
1090 | die_errno(_("Unable to read current working directory")); | |
1091 | strbuf_addbuf(&dir, &cwd); | |
1092 | ||
01017dce | 1093 | switch (setup_git_directory_gently_1(&dir, &gitdir, 1)) { |
ce9b8aab | 1094 | case GIT_DIR_EXPLICIT: |
abade65b | 1095 | prefix = setup_explicit_git_dir(gitdir.buf, &cwd, &repo_fmt, nongit_ok); |
ce9b8aab JS |
1096 | break; |
1097 | case GIT_DIR_DISCOVERED: | |
1098 | if (dir.len < cwd.len && chdir(dir.buf)) | |
fc045fe7 | 1099 | die(_("cannot change to '%s'"), dir.buf); |
ce9b8aab | 1100 | prefix = setup_discovered_git_dir(gitdir.buf, &cwd, dir.len, |
abade65b | 1101 | &repo_fmt, nongit_ok); |
ce9b8aab JS |
1102 | break; |
1103 | case GIT_DIR_BARE: | |
1104 | if (dir.len < cwd.len && chdir(dir.buf)) | |
fc045fe7 | 1105 | die(_("cannot change to '%s'"), dir.buf); |
abade65b | 1106 | prefix = setup_bare_git_dir(&cwd, dir.len, &repo_fmt, nongit_ok); |
ce9b8aab JS |
1107 | break; |
1108 | case GIT_DIR_HIT_CEILING: | |
07098b81 ED |
1109 | if (!nongit_ok) |
1110 | die(_("not a git repository (or any of the parent directories): %s"), | |
1111 | DEFAULT_GIT_DIR_ENVIRONMENT); | |
1112 | *nongit_ok = 1; | |
ce9b8aab JS |
1113 | break; |
1114 | case GIT_DIR_HIT_MOUNT_POINT: | |
07098b81 ED |
1115 | if (!nongit_ok) |
1116 | die(_("not a git repository (or any parent up to mount point %s)\n" | |
1117 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."), | |
1118 | dir.buf); | |
1119 | *nongit_ok = 1; | |
1120 | break; | |
1121 | case GIT_DIR_NONE: | |
1122 | /* | |
1123 | * As a safeguard against setup_git_directory_gently_1 returning | |
1124 | * this value, fallthrough to BUG. Otherwise it is possible to | |
1125 | * set startup_info->have_repository to 1 when we did nothing to | |
1126 | * find a repository. | |
1127 | */ | |
ce9b8aab | 1128 | default: |
033abf97 | 1129 | BUG("unhandled setup_git_directory_1() result"); |
ce9b8aab JS |
1130 | } |
1131 | ||
07098b81 ED |
1132 | /* |
1133 | * At this point, nongit_ok is stable. If it is non-NULL and points | |
1134 | * to a non-zero value, then this means that we haven't found a | |
1135 | * repository and that the caller expects startup_info to reflect | |
1136 | * this. | |
1137 | * | |
1138 | * Regardless of the state of nongit_ok, startup_info->prefix and | |
1139 | * the GIT_PREFIX environment variable must always match. For details | |
1140 | * see Documentation/config/alias.txt. | |
1141 | */ | |
1142 | if (nongit_ok && *nongit_ok) { | |
1143 | startup_info->have_repository = 0; | |
1144 | startup_info->prefix = NULL; | |
a6f7f9a3 | 1145 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); |
07098b81 ED |
1146 | } else { |
1147 | startup_info->have_repository = 1; | |
1148 | startup_info->prefix = prefix; | |
1149 | if (prefix) | |
1150 | setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1); | |
1151 | else | |
1152 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); | |
1153 | } | |
46c3cd44 | 1154 | |
73f192c9 BW |
1155 | /* |
1156 | * Not all paths through the setup code will call 'set_git_dir()' (which | |
1157 | * directly sets up the environment) so in order to guarantee that the | |
1158 | * environment is in a consistent state after setup, explicitly setup | |
1159 | * the environment if we have a repository. | |
1160 | * | |
1161 | * NEEDSWORK: currently we allow bogus GIT_DIR values to be set in some | |
1162 | * code paths so we also need to explicitly setup the environment if | |
1163 | * the user has set GIT_DIR. It may be beneficial to disallow bogus | |
1164 | * GIT_DIR values at some point in the future. | |
1165 | */ | |
07098b81 ED |
1166 | if (/* GIT_DIR_EXPLICIT, GIT_DIR_DISCOVERED, GIT_DIR_BARE */ |
1167 | startup_info->have_repository || | |
1168 | /* GIT_DIR_EXPLICIT */ | |
1169 | getenv(GIT_DIR_ENVIRONMENT)) { | |
c14c234f BW |
1170 | if (!the_repository->gitdir) { |
1171 | const char *gitdir = getenv(GIT_DIR_ENVIRONMENT); | |
1172 | if (!gitdir) | |
1173 | gitdir = DEFAULT_GIT_DIR_ENVIRONMENT; | |
357a03eb | 1174 | setup_git_env(gitdir); |
c14c234f | 1175 | } |
78a67668 | 1176 | if (startup_info->have_repository) |
1177 | repo_set_hash_algo(the_repository, repo_fmt.hash_algo); | |
c14c234f | 1178 | } |
73f192c9 | 1179 | |
ce9b8aab JS |
1180 | strbuf_release(&dir); |
1181 | strbuf_release(&gitdir); | |
e8805af1 | 1182 | clear_repository_format(&repo_fmt); |
ce9b8aab | 1183 | |
a60645f9 NTND |
1184 | return prefix; |
1185 | } | |
1186 | ||
94df2506 JH |
1187 | int git_config_perm(const char *var, const char *value) |
1188 | { | |
06cbe855 HO |
1189 | int i; |
1190 | char *endptr; | |
1191 | ||
1192 | if (value == NULL) | |
1193 | return PERM_GROUP; | |
1194 | ||
1195 | if (!strcmp(value, "umask")) | |
1196 | return PERM_UMASK; | |
1197 | if (!strcmp(value, "group")) | |
1198 | return PERM_GROUP; | |
1199 | if (!strcmp(value, "all") || | |
1200 | !strcmp(value, "world") || | |
1201 | !strcmp(value, "everybody")) | |
1202 | return PERM_EVERYBODY; | |
1203 | ||
1204 | /* Parse octal numbers */ | |
1205 | i = strtol(value, &endptr, 8); | |
1206 | ||
1207 | /* If not an octal number, maybe true/false? */ | |
1208 | if (*endptr != 0) | |
1209 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
1210 | ||
1211 | /* | |
1212 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 1213 | * a chmod value to restrict to. |
06cbe855 HO |
1214 | */ |
1215 | switch (i) { | |
1216 | case PERM_UMASK: /* 0 */ | |
1217 | return PERM_UMASK; | |
1218 | case OLD_PERM_GROUP: /* 1 */ | |
1219 | return PERM_GROUP; | |
1220 | case OLD_PERM_EVERYBODY: /* 2 */ | |
1221 | return PERM_EVERYBODY; | |
94df2506 | 1222 | } |
06cbe855 HO |
1223 | |
1224 | /* A filemode value was given: 0xxx */ | |
1225 | ||
1226 | if ((i & 0600) != 0600) | |
fc045fe7 | 1227 | die(_("problem with core.sharedRepository filemode value " |
06cbe855 | 1228 | "(0%.3o).\nThe owner of files must always have " |
2ff30e67 | 1229 | "read and write permissions."), i); |
06cbe855 HO |
1230 | |
1231 | /* | |
1232 | * Mask filemode value. Others can not get write permission. | |
1233 | * x flags for directories are handled separately. | |
1234 | */ | |
5a688fe4 | 1235 | return -(i & 0666); |
94df2506 JH |
1236 | } |
1237 | ||
4b0d1eeb | 1238 | void check_repository_format(void) |
ab9cb76f | 1239 | { |
e8805af1 | 1240 | struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT; |
abade65b | 1241 | check_repository_format_gently(get_git_dir(), &repo_fmt, NULL); |
f1c126bd | 1242 | startup_info->have_repository = 1; |
e8805af1 | 1243 | clear_repository_format(&repo_fmt); |
ab9cb76f JH |
1244 | } |
1245 | ||
e1e5ec86 CB |
1246 | /* |
1247 | * Returns the "prefix", a path to the current working directory | |
1248 | * relative to the work tree root, or NULL, if the current working | |
1249 | * directory is not a strict subdirectory of the work tree root. The | |
1250 | * prefix always ends with a '/' character. | |
1251 | */ | |
5e7bfe25 JH |
1252 | const char *setup_git_directory(void) |
1253 | { | |
b3f66fd3 | 1254 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 1255 | } |
abc06822 | 1256 | |
40d96325 | 1257 | const char *resolve_gitdir_gently(const char *suspect, int *return_error_code) |
abc06822 FG |
1258 | { |
1259 | if (is_git_directory(suspect)) | |
1260 | return suspect; | |
40d96325 | 1261 | return read_gitfile_gently(suspect, return_error_code); |
abc06822 | 1262 | } |
1d999ddd TR |
1263 | |
1264 | /* if any standard file descriptor is missing open it to /dev/null */ | |
1265 | void sanitize_stdfds(void) | |
1266 | { | |
1267 | int fd = open("/dev/null", O_RDWR, 0); | |
1268 | while (fd != -1 && fd < 2) | |
1269 | fd = dup(fd); | |
1270 | if (fd == -1) | |
fc045fe7 | 1271 | die_errno(_("open /dev/null or dup failed")); |
1d999ddd TR |
1272 | if (fd > 2) |
1273 | close(fd); | |
1274 | } | |
de0957ce NTND |
1275 | |
1276 | int daemonize(void) | |
1277 | { | |
1278 | #ifdef NO_POSIX_GOODIES | |
1279 | errno = ENOSYS; | |
1280 | return -1; | |
1281 | #else | |
1282 | switch (fork()) { | |
1283 | case 0: | |
1284 | break; | |
1285 | case -1: | |
fc045fe7 | 1286 | die_errno(_("fork failed")); |
de0957ce NTND |
1287 | default: |
1288 | exit(0); | |
1289 | } | |
1290 | if (setsid() == -1) | |
fc045fe7 | 1291 | die_errno(_("setsid failed")); |
de0957ce NTND |
1292 | close(0); |
1293 | close(1); | |
1294 | close(2); | |
1295 | sanitize_stdfds(); | |
1296 | return 0; | |
1297 | #endif | |
1298 | } |