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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" |
e90fdc39 JS |
7 | |
8 | static int inside_git_dir = -1; | |
9 | static int inside_work_tree = -1; | |
fada7674 | 10 | static int work_tree_config_is_bogus; |
d288a700 | 11 | |
46c3cd44 JK |
12 | static struct startup_info the_startup_info; |
13 | struct startup_info *startup_info = &the_startup_info; | |
14 | ||
ddc2a628 MEW |
15 | /* |
16 | * The input parameter must contain an absolute path, and it must already be | |
17 | * normalized. | |
18 | * | |
19 | * Find the part of an absolute path that lies inside the work tree by | |
20 | * dereferencing symlinks outside the work tree, for example: | |
21 | * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file | |
22 | * /dir/file (work tree is /) -> dir/file | |
23 | * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2 | |
24 | * /dir/repolink/file (repolink points to /dir/repo) -> file | |
25 | * /dir/repo (exactly equal to work tree) -> (empty string) | |
26 | */ | |
27 | static int abspath_part_inside_repo(char *path) | |
28 | { | |
29 | size_t len; | |
30 | size_t wtlen; | |
31 | char *path0; | |
32 | int off; | |
33 | const char *work_tree = get_git_work_tree(); | |
34 | ||
35 | if (!work_tree) | |
36 | return -1; | |
37 | wtlen = strlen(work_tree); | |
38 | len = strlen(path); | |
6127ff63 | 39 | off = offset_1st_component(path); |
ddc2a628 MEW |
40 | |
41 | /* check if work tree is already the prefix */ | |
42 | if (wtlen <= len && !strncmp(path, work_tree, wtlen)) { | |
43 | if (path[wtlen] == '/') { | |
44 | memmove(path, path + wtlen + 1, len - wtlen); | |
45 | return 0; | |
46 | } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') { | |
47 | /* work tree is the root, or the whole path */ | |
48 | memmove(path, path + wtlen, len - wtlen + 1); | |
49 | return 0; | |
50 | } | |
51 | /* work tree might match beginning of a symlink to work tree */ | |
52 | off = wtlen; | |
53 | } | |
54 | path0 = path; | |
6127ff63 | 55 | path += off; |
ddc2a628 MEW |
56 | |
57 | /* check each '/'-terminated level */ | |
58 | while (*path) { | |
59 | path++; | |
60 | if (*path == '/') { | |
61 | *path = '\0'; | |
62 | if (strcmp(real_path(path0), work_tree) == 0) { | |
63 | memmove(path0, path + 1, len - (path - path0)); | |
64 | return 0; | |
65 | } | |
66 | *path = '/'; | |
67 | } | |
68 | } | |
69 | ||
70 | /* check whole path */ | |
71 | if (strcmp(real_path(path0), work_tree) == 0) { | |
72 | *path0 = '\0'; | |
73 | return 0; | |
74 | } | |
75 | ||
76 | return -1; | |
77 | } | |
78 | ||
645a29c4 NTND |
79 | /* |
80 | * Normalize "path", prepending the "prefix" for relative paths. If | |
81 | * remaining_prefix is not NULL, return the actual prefix still | |
82 | * remains in the path. For example, prefix = sub1/sub2/ and path is | |
83 | * | |
84 | * foo -> sub1/sub2/foo (full prefix) | |
85 | * ../foo -> sub1/foo (remaining prefix is sub1/) | |
86 | * ../../bar -> bar (no remaining prefix) | |
87 | * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix) | |
88 | * `pwd`/../bar -> sub1/bar (no remaining prefix) | |
89 | */ | |
90 | char *prefix_path_gently(const char *prefix, int len, | |
91 | int *remaining_prefix, const char *path) | |
d089ebaa JH |
92 | { |
93 | const char *orig = path; | |
18e051a3 CMAB |
94 | char *sanitized; |
95 | if (is_absolute_path(orig)) { | |
3733e694 | 96 | sanitized = xmallocz(strlen(path)); |
645a29c4 NTND |
97 | if (remaining_prefix) |
98 | *remaining_prefix = 0; | |
655ee9ea MEW |
99 | if (normalize_path_copy_len(sanitized, path, remaining_prefix)) { |
100 | free(sanitized); | |
101 | return NULL; | |
102 | } | |
103 | if (abspath_part_inside_repo(sanitized)) { | |
104 | free(sanitized); | |
105 | return NULL; | |
106 | } | |
18e051a3 | 107 | } else { |
24041d6b | 108 | sanitized = xstrfmt("%.*s%s", len, len ? prefix : "", path); |
645a29c4 NTND |
109 | if (remaining_prefix) |
110 | *remaining_prefix = len; | |
655ee9ea | 111 | if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) { |
546e0fd9 JK |
112 | free(sanitized); |
113 | return NULL; | |
d089ebaa | 114 | } |
d089ebaa JH |
115 | } |
116 | return sanitized; | |
f332726e LT |
117 | } |
118 | ||
546e0fd9 JK |
119 | char *prefix_path(const char *prefix, int len, const char *path) |
120 | { | |
645a29c4 | 121 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 | 122 | if (!r) |
fc045fe7 | 123 | die(_("'%s' is outside repository"), path); |
546e0fd9 JK |
124 | return r; |
125 | } | |
126 | ||
127 | int path_inside_repo(const char *prefix, const char *path) | |
128 | { | |
129 | int len = prefix ? strlen(prefix) : 0; | |
645a29c4 | 130 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
131 | if (r) { |
132 | free(r); | |
133 | return 1; | |
134 | } | |
135 | return 0; | |
136 | } | |
137 | ||
c6e8c800 JH |
138 | int check_filename(const char *prefix, const char *arg) |
139 | { | |
e4da43b1 | 140 | char *to_free = NULL; |
c6e8c800 JH |
141 | struct stat st; |
142 | ||
d51c6ee0 JK |
143 | if (skip_prefix(arg, ":/", &arg)) { |
144 | if (!*arg) /* ":/" is root dir, always exists */ | |
4db86e8b | 145 | return 1; |
a08cbcda | 146 | prefix = NULL; |
42471bce JK |
147 | } else if (skip_prefix(arg, ":!", &arg) || |
148 | skip_prefix(arg, ":^", &arg)) { | |
149 | if (!*arg) /* excluding everything is silly, but allowed */ | |
150 | return 1; | |
a08cbcda JK |
151 | } |
152 | ||
153 | if (prefix) | |
154 | arg = to_free = prefix_filename(prefix, arg); | |
155 | ||
156 | if (!lstat(arg, &st)) { | |
e4da43b1 | 157 | free(to_free); |
c6e8c800 | 158 | return 1; /* file exists */ |
e4da43b1 | 159 | } |
93dd544f | 160 | if (is_missing_file_error(errno)) { |
e4da43b1 | 161 | free(to_free); |
c6e8c800 | 162 | return 0; /* file does not exist */ |
e4da43b1 | 163 | } |
fc045fe7 | 164 | die_errno(_("failed to stat '%s'"), arg); |
c6e8c800 JH |
165 | } |
166 | ||
023e37c3 MM |
167 | static void NORETURN die_verify_filename(const char *prefix, |
168 | const char *arg, | |
169 | int diagnose_misspelt_rev) | |
009fee47 | 170 | { |
023e37c3 | 171 | if (!diagnose_misspelt_rev) |
ab33a76e VA |
172 | die(_("%s: no such path in the working tree.\n" |
173 | "Use 'git <command> -- <path>...' to specify paths that do not exist locally."), | |
023e37c3 | 174 | arg); |
0e539dca JH |
175 | /* |
176 | * Saying "'(icase)foo' does not exist in the index" when the | |
177 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
178 | * begins with a colon and is followed by a non-alnum; do not | |
8c135ea2 | 179 | * let maybe_die_on_misspelt_object_name() even trigger. |
0e539dca JH |
180 | */ |
181 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
8c135ea2 | 182 | maybe_die_on_misspelt_object_name(arg, prefix); |
0e539dca | 183 | |
009fee47 | 184 | /* ... or fall back the most general message. */ |
ab33a76e VA |
185 | die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n" |
186 | "Use '--' to separate paths from revisions, like this:\n" | |
187 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
009fee47 MM |
188 | |
189 | } | |
190 | ||
c99eddd8 JK |
191 | /* |
192 | * Check for arguments that don't resolve as actual files, | |
193 | * but which look sufficiently like pathspecs that we'll consider | |
194 | * them such for the purposes of rev/pathspec DWIM parsing. | |
195 | */ | |
196 | static int looks_like_pathspec(const char *arg) | |
197 | { | |
198 | /* anything with a wildcard character */ | |
199 | if (!no_wildcard(arg)) | |
200 | return 1; | |
201 | ||
202 | /* long-form pathspec magic */ | |
203 | if (starts_with(arg, ":(")) | |
204 | return 1; | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
e23d0b4a LT |
209 | /* |
210 | * Verify a filename that we got as an argument for a pathspec | |
211 | * entry. Note that a filename that begins with "-" never verifies | |
212 | * as true, because even if such a filename were to exist, we want | |
213 | * it to be preceded by the "--" marker (or we want the user to | |
214 | * use a format like "./-filename") | |
023e37c3 MM |
215 | * |
216 | * The "diagnose_misspelt_rev" is used to provide a user-friendly | |
217 | * diagnosis when dying upon finding that "name" is not a pathname. | |
218 | * If set to 1, the diagnosis will try to diagnose "name" as an | |
219 | * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis | |
220 | * will only complain about an inexisting file. | |
221 | * | |
222 | * This function is typically called to check that a "file or rev" | |
223 | * argument is unambiguous. In this case, the caller will want | |
224 | * diagnose_misspelt_rev == 1 when verifying the first non-rev | |
225 | * argument (which could have been a revision), and | |
226 | * diagnose_misspelt_rev == 0 for the next ones (because we already | |
227 | * saw a filename, there's not ambiguity anymore). | |
e23d0b4a | 228 | */ |
023e37c3 MM |
229 | void verify_filename(const char *prefix, |
230 | const char *arg, | |
231 | int diagnose_misspelt_rev) | |
e23d0b4a | 232 | { |
e23d0b4a | 233 | if (*arg == '-') |
fc045fe7 | 234 | die(_("option '%s' must come before non-option arguments"), arg); |
2cb47ab6 | 235 | if (looks_like_pathspec(arg) || check_filename(prefix, arg)) |
e23d0b4a | 236 | return; |
023e37c3 | 237 | die_verify_filename(prefix, arg, diagnose_misspelt_rev); |
e23d0b4a LT |
238 | } |
239 | ||
ea92f41f JH |
240 | /* |
241 | * Opposite of the above: the command line did not have -- marker | |
242 | * and we parsed the arg as a refname. It should not be interpretable | |
243 | * as a filename. | |
244 | */ | |
245 | void verify_non_filename(const char *prefix, const char *arg) | |
246 | { | |
7ae3df8c | 247 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 248 | return; |
ea92f41f JH |
249 | if (*arg == '-') |
250 | return; /* flag */ | |
c6e8c800 JH |
251 | if (!check_filename(prefix, arg)) |
252 | return; | |
ab33a76e VA |
253 | die(_("ambiguous argument '%s': both revision and filename\n" |
254 | "Use '--' to separate paths from revisions, like this:\n" | |
255 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
ea92f41f JH |
256 | } |
257 | ||
31e26ebc | 258 | int get_common_dir(struct strbuf *sb, const char *gitdir) |
11f9dd71 MK |
259 | { |
260 | const char *git_env_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT); | |
261 | if (git_env_common_dir) { | |
262 | strbuf_addstr(sb, git_env_common_dir); | |
263 | return 1; | |
264 | } else { | |
265 | return get_common_dir_noenv(sb, gitdir); | |
266 | } | |
267 | } | |
268 | ||
269 | int get_common_dir_noenv(struct strbuf *sb, const char *gitdir) | |
4dc4e145 NTND |
270 | { |
271 | struct strbuf data = STRBUF_INIT; | |
272 | struct strbuf path = STRBUF_INIT; | |
31e26ebc | 273 | int ret = 0; |
11f9dd71 | 274 | |
4dc4e145 NTND |
275 | strbuf_addf(&path, "%s/commondir", gitdir); |
276 | if (file_exists(path.buf)) { | |
277 | if (strbuf_read_file(&data, path.buf, 0) <= 0) | |
278 | die_errno(_("failed to read %s"), path.buf); | |
279 | while (data.len && (data.buf[data.len - 1] == '\n' || | |
280 | data.buf[data.len - 1] == '\r')) | |
281 | data.len--; | |
282 | data.buf[data.len] = '\0'; | |
283 | strbuf_reset(&path); | |
284 | if (!is_absolute_path(data.buf)) | |
285 | strbuf_addf(&path, "%s/", gitdir); | |
286 | strbuf_addbuf(&path, &data); | |
33ad9ddd | 287 | strbuf_add_real_path(sb, path.buf); |
31e26ebc | 288 | ret = 1; |
4ac9006f | 289 | } else { |
4dc4e145 | 290 | strbuf_addstr(sb, gitdir); |
4ac9006f BW |
291 | } |
292 | ||
4dc4e145 NTND |
293 | strbuf_release(&data); |
294 | strbuf_release(&path); | |
31e26ebc | 295 | return ret; |
4dc4e145 | 296 | } |
d288a700 | 297 | |
5f5608bc | 298 | /* |
ad1a382f | 299 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 300 | * We want to see: |
5f5608bc | 301 | * |
790296fd | 302 | * - either an objects/ directory _or_ the proper |
5f5608bc | 303 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 304 | * - a refs/ directory |
8098a178 | 305 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
306 | * a proper "ref:", or a regular file HEAD that has a properly |
307 | * formatted sha1 object name. | |
5f5608bc | 308 | */ |
b3256eb8 | 309 | int is_git_directory(const char *suspect) |
5f5608bc | 310 | { |
1d186b6f NTND |
311 | struct strbuf path = STRBUF_INIT; |
312 | int ret = 0; | |
313 | size_t len; | |
ad1a382f | 314 | |
4dc4e145 | 315 | /* Check worktree-related signatures */ |
fa4d8c78 JK |
316 | strbuf_addstr(&path, suspect); |
317 | strbuf_complete(&path, '/'); | |
318 | strbuf_addstr(&path, "HEAD"); | |
4dc4e145 NTND |
319 | if (validate_headref(path.buf)) |
320 | goto done; | |
321 | ||
322 | strbuf_reset(&path); | |
323 | get_common_dir(&path, suspect); | |
1d186b6f | 324 | len = path.len; |
4dc4e145 NTND |
325 | |
326 | /* Check non-worktree-related signatures */ | |
ad1a382f SP |
327 | if (getenv(DB_ENVIRONMENT)) { |
328 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
1d186b6f | 329 | goto done; |
ad1a382f SP |
330 | } |
331 | else { | |
4dc4e145 | 332 | strbuf_setlen(&path, len); |
1d186b6f NTND |
333 | strbuf_addstr(&path, "/objects"); |
334 | if (access(path.buf, X_OK)) | |
335 | goto done; | |
ad1a382f SP |
336 | } |
337 | ||
1d186b6f NTND |
338 | strbuf_setlen(&path, len); |
339 | strbuf_addstr(&path, "/refs"); | |
340 | if (access(path.buf, X_OK)) | |
341 | goto done; | |
ad1a382f | 342 | |
1d186b6f NTND |
343 | ret = 1; |
344 | done: | |
345 | strbuf_release(&path); | |
346 | return ret; | |
5f5608bc LT |
347 | } |
348 | ||
ffd036b1 JK |
349 | int is_nonbare_repository_dir(struct strbuf *path) |
350 | { | |
351 | int ret = 0; | |
352 | int gitfile_error; | |
353 | size_t orig_path_len = path->len; | |
354 | assert(orig_path_len != 0); | |
355 | strbuf_complete(path, '/'); | |
356 | strbuf_addstr(path, ".git"); | |
357 | if (read_gitfile_gently(path->buf, &gitfile_error) || is_git_directory(path->buf)) | |
358 | ret = 1; | |
359 | if (gitfile_error == READ_GITFILE_ERR_OPEN_FAILED || | |
360 | gitfile_error == READ_GITFILE_ERR_READ_FAILED) | |
361 | ret = 1; | |
362 | strbuf_setlen(path, orig_path_len); | |
363 | return ret; | |
364 | } | |
365 | ||
68025633 JS |
366 | int is_inside_git_dir(void) |
367 | { | |
e90fdc39 JS |
368 | if (inside_git_dir < 0) |
369 | inside_git_dir = is_inside_dir(get_git_dir()); | |
370 | return inside_git_dir; | |
892c41b9 ML |
371 | } |
372 | ||
892c41b9 ML |
373 | int is_inside_work_tree(void) |
374 | { | |
e90fdc39 JS |
375 | if (inside_work_tree < 0) |
376 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
377 | return inside_work_tree; | |
892c41b9 ML |
378 | } |
379 | ||
f3fa1838 JH |
380 | void setup_work_tree(void) |
381 | { | |
8500e0de | 382 | const char *work_tree; |
354e6534 JS |
383 | static int initialized = 0; |
384 | ||
385 | if (initialized) | |
386 | return; | |
fada7674 JK |
387 | |
388 | if (work_tree_config_is_bogus) | |
fc045fe7 | 389 | die(_("unable to set up work tree using invalid config")); |
fada7674 | 390 | |
354e6534 | 391 | work_tree = get_git_work_tree(); |
8500e0de | 392 | if (!work_tree || chdir_notify(work_tree)) |
fc045fe7 | 393 | die(_("this operation must be run in a work tree")); |
0ed74813 NTND |
394 | |
395 | /* | |
396 | * Make sure subsequent git processes find correct worktree | |
397 | * if $GIT_WORK_TREE is set relative | |
398 | */ | |
399 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
400 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
401 | ||
354e6534 | 402 | initialized = 1; |
59f0f2f3 MH |
403 | } |
404 | ||
58b284a2 NTND |
405 | static int read_worktree_config(const char *var, const char *value, void *vdata) |
406 | { | |
407 | struct repository_format *data = vdata; | |
408 | ||
409 | if (strcmp(var, "core.bare") == 0) { | |
410 | data->is_bare = git_config_bool(var, value); | |
411 | } else if (strcmp(var, "core.worktree") == 0) { | |
412 | if (!value) | |
413 | return config_error_nonbool(var); | |
414 | data->work_tree = xstrdup(value); | |
415 | } | |
416 | return 0; | |
417 | } | |
418 | ||
2cc7c2c7 | 419 | static int check_repo_format(const char *var, const char *value, void *vdata) |
31e26ebc | 420 | { |
2cc7c2c7 | 421 | struct repository_format *data = vdata; |
00a09d57 JK |
422 | const char *ext; |
423 | ||
31e26ebc | 424 | if (strcmp(var, "core.repositoryformatversion") == 0) |
2cc7c2c7 | 425 | data->version = git_config_int(var, value); |
00a09d57 JK |
426 | else if (skip_prefix(var, "extensions.", &ext)) { |
427 | /* | |
428 | * record any known extensions here; otherwise, | |
429 | * we fall through to recording it as unknown, and | |
430 | * check_repository_format will complain | |
431 | */ | |
432 | if (!strcmp(ext, "noop")) | |
433 | ; | |
067fbd41 | 434 | else if (!strcmp(ext, "preciousobjects")) |
2cc7c2c7 | 435 | data->precious_objects = git_config_bool(var, value); |
75b97fec JT |
436 | else if (!strcmp(ext, "partialclone")) { |
437 | if (!value) | |
438 | return config_error_nonbool(var); | |
439 | data->partial_clone = xstrdup(value); | |
58b284a2 NTND |
440 | } else if (!strcmp(ext, "worktreeconfig")) |
441 | data->worktree_config = git_config_bool(var, value); | |
442 | else | |
2cc7c2c7 | 443 | string_list_append(&data->unknown_extensions, ext); |
00a09d57 | 444 | } |
58b284a2 NTND |
445 | |
446 | return read_worktree_config(var, value, vdata); | |
31e26ebc NTND |
447 | } |
448 | ||
abade65b | 449 | static int check_repository_format_gently(const char *gitdir, struct repository_format *candidate, int *nongit_ok) |
9459aa77 | 450 | { |
7d0fb0da | 451 | struct strbuf sb = STRBUF_INIT; |
2cc7c2c7 | 452 | struct strbuf err = STRBUF_INIT; |
652f18ee | 453 | int has_common; |
00a09d57 | 454 | |
652f18ee | 455 | has_common = get_common_dir(&sb, gitdir); |
e61a509a | 456 | strbuf_addstr(&sb, "/config"); |
abade65b | 457 | read_repository_format(candidate, sb.buf); |
2cc7c2c7 | 458 | strbuf_release(&sb); |
e61a509a | 459 | |
337e51ce | 460 | /* |
2cc7c2c7 JK |
461 | * For historical use of check_repository_format() in git-init, |
462 | * we treat a missing config as a silent "ok", even when nongit_ok | |
463 | * is unset. | |
337e51ce | 464 | */ |
abade65b | 465 | if (candidate->version < 0) |
2cc7c2c7 JK |
466 | return 0; |
467 | ||
abade65b | 468 | if (verify_repository_format(candidate, &err) < 0) { |
2cc7c2c7 JK |
469 | if (nongit_ok) { |
470 | warning("%s", err.buf); | |
471 | strbuf_release(&err); | |
472 | *nongit_ok = -1; | |
473 | return -1; | |
474 | } | |
475 | die("%s", err.buf); | |
476 | } | |
477 | ||
abade65b | 478 | repository_format_precious_objects = candidate->precious_objects; |
f3d618d2 | 479 | repository_format_partial_clone = candidate->partial_clone; |
58b284a2 | 480 | repository_format_worktree_config = candidate->worktree_config; |
abade65b | 481 | string_list_clear(&candidate->unknown_extensions, 0); |
58b284a2 NTND |
482 | |
483 | if (repository_format_worktree_config) { | |
484 | /* | |
485 | * pick up core.bare and core.worktree from per-worktree | |
486 | * config if present | |
487 | */ | |
488 | strbuf_addf(&sb, "%s/config.worktree", gitdir); | |
489 | git_config_from_file(read_worktree_config, sb.buf, candidate); | |
490 | strbuf_release(&sb); | |
491 | has_common = 0; | |
492 | } | |
493 | ||
652f18ee | 494 | if (!has_common) { |
abade65b | 495 | if (candidate->is_bare != -1) { |
496 | is_bare_repository_cfg = candidate->is_bare; | |
652f18ee JK |
497 | if (is_bare_repository_cfg == 1) |
498 | inside_work_tree = -1; | |
499 | } | |
abade65b | 500 | if (candidate->work_tree) { |
652f18ee | 501 | free(git_work_tree_cfg); |
abade65b | 502 | git_work_tree_cfg = candidate->work_tree; |
2cc7c2c7 | 503 | inside_work_tree = -1; |
652f18ee JK |
504 | } |
505 | } else { | |
abade65b | 506 | free(candidate->work_tree); |
2cc7c2c7 JK |
507 | } |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
652f18ee | 512 | int read_repository_format(struct repository_format *format, const char *path) |
2cc7c2c7 JK |
513 | { |
514 | memset(format, 0, sizeof(*format)); | |
515 | format->version = -1; | |
516 | format->is_bare = -1; | |
78a67668 | 517 | format->hash_algo = GIT_HASH_SHA1; |
2cc7c2c7 | 518 | string_list_init(&format->unknown_extensions, 1); |
652f18ee | 519 | git_config_from_file(check_repo_format, path, format); |
2cc7c2c7 JK |
520 | return format->version; |
521 | } | |
522 | ||
2cc7c2c7 JK |
523 | int verify_repository_format(const struct repository_format *format, |
524 | struct strbuf *err) | |
525 | { | |
526 | if (GIT_REPO_VERSION_READ < format->version) { | |
274db840 | 527 | strbuf_addf(err, _("Expected git repo version <= %d, found %d"), |
2cc7c2c7 JK |
528 | GIT_REPO_VERSION_READ, format->version); |
529 | return -1; | |
530 | } | |
531 | ||
532 | if (format->version >= 1 && format->unknown_extensions.nr) { | |
00a09d57 JK |
533 | int i; |
534 | ||
274db840 | 535 | strbuf_addstr(err, _("unknown repository extensions found:")); |
00a09d57 | 536 | |
2cc7c2c7 JK |
537 | for (i = 0; i < format->unknown_extensions.nr; i++) |
538 | strbuf_addf(err, "\n\t%s", | |
539 | format->unknown_extensions.items[i].string); | |
540 | return -1; | |
00a09d57 JK |
541 | } |
542 | ||
2cc7c2c7 | 543 | return 0; |
9459aa77 NTND |
544 | } |
545 | ||
5f29433f SB |
546 | void read_gitfile_error_die(int error_code, const char *path, const char *dir) |
547 | { | |
548 | switch (error_code) { | |
549 | case READ_GITFILE_ERR_STAT_FAILED: | |
550 | case READ_GITFILE_ERR_NOT_A_FILE: | |
551 | /* non-fatal; follow return path */ | |
552 | break; | |
553 | case READ_GITFILE_ERR_OPEN_FAILED: | |
fc045fe7 | 554 | die_errno(_("error opening '%s'"), path); |
5f29433f | 555 | case READ_GITFILE_ERR_TOO_LARGE: |
fc045fe7 | 556 | die(_("too large to be a .git file: '%s'"), path); |
5f29433f | 557 | case READ_GITFILE_ERR_READ_FAILED: |
fc045fe7 | 558 | die(_("error reading %s"), path); |
5f29433f | 559 | case READ_GITFILE_ERR_INVALID_FORMAT: |
fc045fe7 | 560 | die(_("invalid gitfile format: %s"), path); |
5f29433f | 561 | case READ_GITFILE_ERR_NO_PATH: |
fc045fe7 | 562 | die(_("no path in gitfile: %s"), path); |
5f29433f | 563 | case READ_GITFILE_ERR_NOT_A_REPO: |
fc045fe7 | 564 | die(_("not a git repository: %s"), dir); |
5f29433f | 565 | default: |
033abf97 | 566 | BUG("unknown error code"); |
5f29433f SB |
567 | } |
568 | } | |
569 | ||
b44ebb19 LH |
570 | /* |
571 | * Try to read the location of the git directory from the .git file, | |
ea1d8756 HWN |
572 | * return path to git directory if found. The return value comes from |
573 | * a shared buffer. | |
a93bedad EE |
574 | * |
575 | * On failure, if return_error_code is not NULL, return_error_code | |
576 | * will be set to an error code and NULL will be returned. If | |
577 | * return_error_code is NULL the function will die instead (for most | |
578 | * cases). | |
b44ebb19 | 579 | */ |
a93bedad | 580 | const char *read_gitfile_gently(const char *path, int *return_error_code) |
b44ebb19 | 581 | { |
921bdd96 | 582 | const int max_file_size = 1 << 20; /* 1MB */ |
a93bedad EE |
583 | int error_code = 0; |
584 | char *buf = NULL; | |
585 | char *dir = NULL; | |
40c813e0 | 586 | const char *slash; |
b44ebb19 LH |
587 | struct stat st; |
588 | int fd; | |
b1905aea | 589 | ssize_t len; |
b44ebb19 | 590 | |
a93bedad | 591 | if (stat(path, &st)) { |
5c4003ca | 592 | /* NEEDSWORK: discern between ENOENT vs other errors */ |
a93bedad EE |
593 | error_code = READ_GITFILE_ERR_STAT_FAILED; |
594 | goto cleanup_return; | |
595 | } | |
596 | if (!S_ISREG(st.st_mode)) { | |
597 | error_code = READ_GITFILE_ERR_NOT_A_FILE; | |
598 | goto cleanup_return; | |
599 | } | |
921bdd96 EE |
600 | if (st.st_size > max_file_size) { |
601 | error_code = READ_GITFILE_ERR_TOO_LARGE; | |
602 | goto cleanup_return; | |
603 | } | |
b44ebb19 | 604 | fd = open(path, O_RDONLY); |
a93bedad EE |
605 | if (fd < 0) { |
606 | error_code = READ_GITFILE_ERR_OPEN_FAILED; | |
607 | goto cleanup_return; | |
608 | } | |
3733e694 | 609 | buf = xmallocz(st.st_size); |
b44ebb19 LH |
610 | len = read_in_full(fd, buf, st.st_size); |
611 | close(fd); | |
a93bedad EE |
612 | if (len != st.st_size) { |
613 | error_code = READ_GITFILE_ERR_READ_FAILED; | |
614 | goto cleanup_return; | |
615 | } | |
a93bedad EE |
616 | if (!starts_with(buf, "gitdir: ")) { |
617 | error_code = READ_GITFILE_ERR_INVALID_FORMAT; | |
618 | goto cleanup_return; | |
619 | } | |
b44ebb19 LH |
620 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') |
621 | len--; | |
a93bedad EE |
622 | if (len < 9) { |
623 | error_code = READ_GITFILE_ERR_NO_PATH; | |
624 | goto cleanup_return; | |
625 | } | |
b44ebb19 | 626 | buf[len] = '\0'; |
40c813e0 BK |
627 | dir = buf + 8; |
628 | ||
629 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
630 | size_t pathlen = slash+1 - path; | |
75faa45a JK |
631 | dir = xstrfmt("%.*s%.*s", (int)pathlen, path, |
632 | (int)(len - 8), buf + 8); | |
40c813e0 BK |
633 | free(buf); |
634 | buf = dir; | |
635 | } | |
a93bedad EE |
636 | if (!is_git_directory(dir)) { |
637 | error_code = READ_GITFILE_ERR_NOT_A_REPO; | |
638 | goto cleanup_return; | |
639 | } | |
e2a57aac | 640 | path = real_path(dir); |
40c813e0 | 641 | |
a93bedad | 642 | cleanup_return: |
a93bedad EE |
643 | if (return_error_code) |
644 | *return_error_code = error_code; | |
5f29433f SB |
645 | else if (error_code) |
646 | read_gitfile_error_die(error_code, path, dir); | |
a93bedad | 647 | |
b44ebb19 | 648 | free(buf); |
38ae8784 | 649 | return error_code ? NULL : path; |
b44ebb19 LH |
650 | } |
651 | ||
e4e30347 | 652 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
7333ed17 | 653 | struct strbuf *cwd, |
abade65b | 654 | struct repository_format *repo_fmt, |
b3f66fd3 | 655 | int *nongit_ok) |
e4e30347 | 656 | { |
b3f66fd3 NTND |
657 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
658 | const char *worktree; | |
659 | char *gitfile; | |
9b125da4 | 660 | int offset; |
e4e30347 JN |
661 | |
662 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
fc045fe7 | 663 | die(_("'$%s' too big"), GIT_DIR_ENVIRONMENT); |
b3f66fd3 | 664 | |
13d6ec91 | 665 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
666 | if (gitfile) { |
667 | gitfile = xstrdup(gitfile); | |
668 | gitdirenv = gitfile; | |
669 | } | |
670 | ||
e4e30347 JN |
671 | if (!is_git_directory(gitdirenv)) { |
672 | if (nongit_ok) { | |
673 | *nongit_ok = 1; | |
b3f66fd3 | 674 | free(gitfile); |
e4e30347 JN |
675 | return NULL; |
676 | } | |
fc045fe7 | 677 | die(_("not a git repository: '%s'"), gitdirenv); |
e4e30347 | 678 | } |
b3f66fd3 | 679 | |
abade65b | 680 | if (check_repository_format_gently(gitdirenv, repo_fmt, nongit_ok)) { |
b3f66fd3 NTND |
681 | free(gitfile); |
682 | return NULL; | |
e4e30347 | 683 | } |
b3f66fd3 NTND |
684 | |
685 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
686 | if (work_tree_env) | |
687 | set_git_work_tree(work_tree_env); | |
688 | else if (is_bare_repository_cfg > 0) { | |
fada7674 JK |
689 | if (git_work_tree_cfg) { |
690 | /* #22.2, #30 */ | |
691 | warning("core.bare and core.worktree do not make sense"); | |
692 | work_tree_config_is_bogus = 1; | |
693 | } | |
b3f66fd3 NTND |
694 | |
695 | /* #18, #26 */ | |
696 | set_git_dir(gitdirenv); | |
697 | free(gitfile); | |
e4e30347 | 698 | return NULL; |
b3f66fd3 NTND |
699 | } |
700 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
701 | if (is_absolute_path(git_work_tree_cfg)) | |
702 | set_git_work_tree(git_work_tree_cfg); | |
703 | else { | |
56b9f6e7 | 704 | char *core_worktree; |
b3f66fd3 | 705 | if (chdir(gitdirenv)) |
fc045fe7 | 706 | die_errno(_("cannot chdir to '%s'"), gitdirenv); |
b3f66fd3 | 707 | if (chdir(git_work_tree_cfg)) |
fc045fe7 | 708 | die_errno(_("cannot chdir to '%s'"), git_work_tree_cfg); |
56b9f6e7 | 709 | core_worktree = xgetcwd(); |
7333ed17 | 710 | if (chdir(cwd->buf)) |
fc045fe7 | 711 | die_errno(_("cannot come back to cwd")); |
b3f66fd3 | 712 | set_git_work_tree(core_worktree); |
56b9f6e7 | 713 | free(core_worktree); |
b3f66fd3 NTND |
714 | } |
715 | } | |
2cd83d10 JK |
716 | else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) { |
717 | /* #16d */ | |
718 | set_git_dir(gitdirenv); | |
719 | free(gitfile); | |
720 | return NULL; | |
721 | } | |
b3f66fd3 NTND |
722 | else /* #2, #10 */ |
723 | set_git_work_tree("."); | |
724 | ||
725 | /* set_git_work_tree() must have been called by now */ | |
726 | worktree = get_git_work_tree(); | |
727 | ||
728 | /* both get_git_work_tree() and cwd are already normalized */ | |
7333ed17 | 729 | if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */ |
b3f66fd3 NTND |
730 | set_git_dir(gitdirenv); |
731 | free(gitfile); | |
e4e30347 | 732 | return NULL; |
b3f66fd3 | 733 | } |
e4e30347 | 734 | |
7333ed17 | 735 | offset = dir_inside_of(cwd->buf, worktree); |
9b125da4 | 736 | if (offset >= 0) { /* cwd inside worktree? */ |
e2a57aac | 737 | set_git_dir(real_path(gitdirenv)); |
b3f66fd3 | 738 | if (chdir(worktree)) |
fc045fe7 | 739 | die_errno(_("cannot chdir to '%s'"), worktree); |
7333ed17 | 740 | strbuf_addch(cwd, '/'); |
b3f66fd3 | 741 | free(gitfile); |
7333ed17 | 742 | return cwd->buf + offset; |
93a00542 | 743 | } |
b3f66fd3 NTND |
744 | |
745 | /* cwd outside worktree */ | |
746 | set_git_dir(gitdirenv); | |
747 | free(gitfile); | |
748 | return NULL; | |
93a00542 JN |
749 | } |
750 | ||
9951d3b3 | 751 | static const char *setup_discovered_git_dir(const char *gitdir, |
7333ed17 | 752 | struct strbuf *cwd, int offset, |
abade65b | 753 | struct repository_format *repo_fmt, |
9951d3b3 | 754 | int *nongit_ok) |
98937bef | 755 | { |
abade65b | 756 | if (check_repository_format_gently(gitdir, repo_fmt, nongit_ok)) |
9951d3b3 | 757 | return NULL; |
98937bef | 758 | |
4868b2ea JN |
759 | /* --work-tree is set without --git-dir; use discovered one */ |
760 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
2d4dcf21 JS |
761 | char *to_free = NULL; |
762 | const char *ret; | |
763 | ||
7333ed17 | 764 | if (offset != cwd->len && !is_absolute_path(gitdir)) |
2d4dcf21 | 765 | gitdir = to_free = real_pathdup(gitdir, 1); |
7333ed17 | 766 | if (chdir(cwd->buf)) |
fc045fe7 | 767 | die_errno(_("cannot come back to cwd")); |
abade65b | 768 | ret = setup_explicit_git_dir(gitdir, cwd, repo_fmt, nongit_ok); |
2d4dcf21 JS |
769 | free(to_free); |
770 | return ret; | |
4868b2ea JN |
771 | } |
772 | ||
9951d3b3 NTND |
773 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
774 | if (is_bare_repository_cfg > 0) { | |
7333ed17 RS |
775 | set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir)); |
776 | if (chdir(cwd->buf)) | |
fc045fe7 | 777 | die_errno(_("cannot come back to cwd")); |
98937bef | 778 | return NULL; |
9951d3b3 | 779 | } |
98937bef | 780 | |
9951d3b3 NTND |
781 | /* #0, #1, #5, #8, #9, #12, #13 */ |
782 | set_git_work_tree("."); | |
783 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
784 | set_git_dir(gitdir); | |
98937bef | 785 | inside_git_dir = 0; |
9951d3b3 | 786 | inside_work_tree = 1; |
7333ed17 | 787 | if (offset == cwd->len) |
98937bef NTND |
788 | return NULL; |
789 | ||
df380d58 JS |
790 | /* Make "offset" point past the '/' (already the case for root dirs) */ |
791 | if (offset != offset_1st_component(cwd->buf)) | |
792 | offset++; | |
793 | /* Add a '/' at the end */ | |
7333ed17 RS |
794 | strbuf_addch(cwd, '/'); |
795 | return cwd->buf + offset; | |
98937bef NTND |
796 | } |
797 | ||
1cd8031b | 798 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
7333ed17 | 799 | static const char *setup_bare_git_dir(struct strbuf *cwd, int offset, |
abade65b | 800 | struct repository_format *repo_fmt, |
7333ed17 | 801 | int *nongit_ok) |
68698da5 JN |
802 | { |
803 | int root_len; | |
804 | ||
abade65b | 805 | if (check_repository_format_gently(".", repo_fmt, nongit_ok)) |
1cd8031b NTND |
806 | return NULL; |
807 | ||
2cd83d10 JK |
808 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
809 | ||
4868b2ea JN |
810 | /* --work-tree is set without --git-dir; use discovered one */ |
811 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
da6f8475 | 812 | static const char *gitdir; |
4868b2ea | 813 | |
7333ed17 RS |
814 | gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset); |
815 | if (chdir(cwd->buf)) | |
fc045fe7 | 816 | die_errno(_("cannot come back to cwd")); |
abade65b | 817 | return setup_explicit_git_dir(gitdir, cwd, repo_fmt, nongit_ok); |
4868b2ea JN |
818 | } |
819 | ||
68698da5 | 820 | inside_git_dir = 1; |
1cd8031b | 821 | inside_work_tree = 0; |
7333ed17 RS |
822 | if (offset != cwd->len) { |
823 | if (chdir(cwd->buf)) | |
fc045fe7 | 824 | die_errno(_("cannot come back to cwd")); |
7333ed17 RS |
825 | root_len = offset_1st_component(cwd->buf); |
826 | strbuf_setlen(cwd, offset > root_len ? offset : root_len); | |
827 | set_git_dir(cwd->buf); | |
337e51ce | 828 | } |
1cd8031b | 829 | else |
68698da5 | 830 | set_git_dir("."); |
68698da5 JN |
831 | return NULL; |
832 | } | |
833 | ||
2565b43b | 834 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
60c98d1e JN |
835 | { |
836 | struct stat buf; | |
2565b43b | 837 | if (stat(path, &buf)) { |
fc045fe7 | 838 | die_errno(_("failed to stat '%*s%s%s'"), |
2565b43b | 839 | prefix_len, |
60c98d1e JN |
840 | prefix ? prefix : "", |
841 | prefix ? "/" : "", path); | |
2565b43b | 842 | } |
60c98d1e JN |
843 | return buf.st_dev; |
844 | } | |
845 | ||
9e2326c7 | 846 | /* |
1b77d83c MH |
847 | * A "string_list_each_func_t" function that canonicalizes an entry |
848 | * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or | |
7ec30aaa MH |
849 | * discards it if unusable. The presence of an empty entry in |
850 | * GIT_CEILING_DIRECTORIES turns off canonicalization for all | |
851 | * subsequent entries. | |
9e2326c7 | 852 | */ |
1b77d83c | 853 | static int canonicalize_ceiling_entry(struct string_list_item *item, |
7ec30aaa | 854 | void *cb_data) |
9e2326c7 | 855 | { |
7ec30aaa | 856 | int *empty_entry_found = cb_data; |
1b77d83c | 857 | char *ceil = item->string; |
9e2326c7 | 858 | |
7ec30aaa MH |
859 | if (!*ceil) { |
860 | *empty_entry_found = 1; | |
9e2326c7 | 861 | return 0; |
7ec30aaa | 862 | } else if (!is_absolute_path(ceil)) { |
9e2326c7 | 863 | return 0; |
7ec30aaa MH |
864 | } else if (*empty_entry_found) { |
865 | /* Keep entry but do not canonicalize it */ | |
866 | return 1; | |
867 | } else { | |
ce83eadd | 868 | char *real_path = real_pathdup(ceil, 0); |
4ac9006f | 869 | if (!real_path) { |
7ec30aaa | 870 | return 0; |
4ac9006f | 871 | } |
7ec30aaa | 872 | free(item->string); |
4ac9006f | 873 | item->string = real_path; |
7ec30aaa MH |
874 | return 1; |
875 | } | |
9e2326c7 MH |
876 | } |
877 | ||
ce9b8aab JS |
878 | enum discovery_result { |
879 | GIT_DIR_NONE = 0, | |
880 | GIT_DIR_EXPLICIT, | |
881 | GIT_DIR_DISCOVERED, | |
882 | GIT_DIR_BARE, | |
883 | /* these are errors */ | |
884 | GIT_DIR_HIT_CEILING = -1, | |
01017dce JS |
885 | GIT_DIR_HIT_MOUNT_POINT = -2, |
886 | GIT_DIR_INVALID_GITFILE = -3 | |
ce9b8aab JS |
887 | }; |
888 | ||
e90fdc39 JS |
889 | /* |
890 | * We cannot decide in this function whether we are in the work tree or | |
891 | * not, since the config can only be read _after_ this function was called. | |
ce9b8aab JS |
892 | * |
893 | * Also, we avoid changing any global state (such as the current working | |
894 | * directory) to allow early callers. | |
895 | * | |
896 | * The directory where the search should start needs to be passed in via the | |
897 | * `dir` parameter; upon return, the `dir` buffer will contain the path of | |
898 | * the directory where the search ended, and `gitdir` will contain the path of | |
899 | * the discovered .git/ directory, if any. If `gitdir` is not absolute, it | |
900 | * is relative to `dir` (i.e. *not* necessarily the cwd). | |
e90fdc39 | 901 | */ |
ce9b8aab | 902 | static enum discovery_result setup_git_directory_gently_1(struct strbuf *dir, |
01017dce JS |
903 | struct strbuf *gitdir, |
904 | int die_on_error) | |
d288a700 | 905 | { |
0454dd93 | 906 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
31171d9e | 907 | struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; |
ce9b8aab JS |
908 | const char *gitdirenv; |
909 | int ceil_offset = -1, min_offset = has_dos_drive_prefix(dir->buf) ? 3 : 1; | |
c7d1d1b1 RH |
910 | dev_t current_device = 0; |
911 | int one_filesystem = 1; | |
d288a700 | 912 | |
e90fdc39 JS |
913 | /* |
914 | * If GIT_DIR is set explicitly, we're not going | |
915 | * to do any discovery, but we still do repository | |
916 | * validation. | |
917 | */ | |
ad1a382f | 918 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
ce9b8aab JS |
919 | if (gitdirenv) { |
920 | strbuf_addstr(gitdir, gitdirenv); | |
921 | return GIT_DIR_EXPLICIT; | |
922 | } | |
d288a700 | 923 | |
31171d9e | 924 | if (env_ceiling_dirs) { |
7ec30aaa MH |
925 | int empty_entry_found = 0; |
926 | ||
31171d9e | 927 | string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); |
1b77d83c | 928 | filter_string_list(&ceiling_dirs, 0, |
7ec30aaa | 929 | canonicalize_ceiling_entry, &empty_entry_found); |
ce9b8aab | 930 | ceil_offset = longest_ancestor_length(dir->buf, &ceiling_dirs); |
31171d9e MH |
931 | string_list_clear(&ceiling_dirs, 0); |
932 | } | |
933 | ||
ce9b8aab JS |
934 | if (ceil_offset < 0) |
935 | ceil_offset = min_offset - 2; | |
d288a700 | 936 | |
892c41b9 | 937 | /* |
ce9b8aab | 938 | * Test in the following order (relative to the dir): |
b44ebb19 | 939 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
940 | * - .git/ |
941 | * - ./ (bare) | |
b44ebb19 | 942 | * - ../.git |
e90fdc39 JS |
943 | * - ../.git/ |
944 | * - ../ (bare) | |
176b2d32 | 945 | * - ../../.git |
e90fdc39 | 946 | * etc. |
892c41b9 | 947 | */ |
cf87463e | 948 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e | 949 | if (one_filesystem) |
ce9b8aab | 950 | current_device = get_device_or_die(dir->buf, NULL, 0); |
e90fdc39 | 951 | for (;;) { |
01017dce | 952 | int offset = dir->len, error_code = 0; |
ce9b8aab JS |
953 | |
954 | if (offset > min_offset) | |
955 | strbuf_addch(dir, '/'); | |
956 | strbuf_addstr(dir, DEFAULT_GIT_DIR_ENVIRONMENT); | |
01017dce JS |
957 | gitdirenv = read_gitfile_gently(dir->buf, die_on_error ? |
958 | NULL : &error_code); | |
959 | if (!gitdirenv) { | |
960 | if (die_on_error || | |
961 | error_code == READ_GITFILE_ERR_NOT_A_FILE) { | |
5c4003ca | 962 | /* NEEDSWORK: fail if .git is not file nor dir */ |
01017dce JS |
963 | if (is_git_directory(dir->buf)) |
964 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
965 | } else if (error_code != READ_GITFILE_ERR_STAT_FAILED) | |
966 | return GIT_DIR_INVALID_GITFILE; | |
9951d3b3 | 967 | } |
ce9b8aab | 968 | strbuf_setlen(dir, offset); |
9951d3b3 | 969 | if (gitdirenv) { |
ce9b8aab JS |
970 | strbuf_addstr(gitdir, gitdirenv); |
971 | return GIT_DIR_DISCOVERED; | |
9951d3b3 | 972 | } |
9951d3b3 | 973 | |
ce9b8aab JS |
974 | if (is_git_directory(dir->buf)) { |
975 | strbuf_addstr(gitdir, "."); | |
976 | return GIT_DIR_BARE; | |
502ffe34 | 977 | } |
9951d3b3 | 978 | |
ce9b8aab JS |
979 | if (offset <= min_offset) |
980 | return GIT_DIR_HIT_CEILING; | |
1cd8031b | 981 | |
ce9b8aab | 982 | while (--offset > ceil_offset && !is_dir_sep(dir->buf[offset])) |
6c1e6544 | 983 | ; /* continue */ |
ce9b8aab JS |
984 | if (offset <= ceil_offset) |
985 | return GIT_DIR_HIT_CEILING; | |
986 | ||
987 | strbuf_setlen(dir, offset > min_offset ? offset : min_offset); | |
988 | if (one_filesystem && | |
989 | current_device != get_device_or_die(dir->buf, NULL, offset)) | |
990 | return GIT_DIR_HIT_MOUNT_POINT; | |
892c41b9 | 991 | } |
d288a700 | 992 | } |
5e7bfe25 | 993 | |
d3fb71b3 BW |
994 | int discover_git_directory(struct strbuf *commondir, |
995 | struct strbuf *gitdir) | |
16ac8b8d JS |
996 | { |
997 | struct strbuf dir = STRBUF_INIT, err = STRBUF_INIT; | |
998 | size_t gitdir_offset = gitdir->len, cwd_len; | |
d3fb71b3 | 999 | size_t commondir_offset = commondir->len; |
16ac8b8d JS |
1000 | struct repository_format candidate; |
1001 | ||
1002 | if (strbuf_getcwd(&dir)) | |
d3fb71b3 | 1003 | return -1; |
16ac8b8d JS |
1004 | |
1005 | cwd_len = dir.len; | |
01017dce | 1006 | if (setup_git_directory_gently_1(&dir, gitdir, 0) <= 0) { |
16ac8b8d | 1007 | strbuf_release(&dir); |
d3fb71b3 | 1008 | return -1; |
16ac8b8d JS |
1009 | } |
1010 | ||
1011 | /* | |
1012 | * The returned gitdir is relative to dir, and if dir does not reflect | |
1013 | * the current working directory, we simply make the gitdir absolute. | |
1014 | */ | |
1015 | if (dir.len < cwd_len && !is_absolute_path(gitdir->buf + gitdir_offset)) { | |
1016 | /* Avoid a trailing "/." */ | |
1017 | if (!strcmp(".", gitdir->buf + gitdir_offset)) | |
1018 | strbuf_setlen(gitdir, gitdir_offset); | |
1019 | else | |
1020 | strbuf_addch(&dir, '/'); | |
1021 | strbuf_insert(gitdir, gitdir_offset, dir.buf, dir.len); | |
1022 | } | |
1023 | ||
d3fb71b3 BW |
1024 | get_common_dir(commondir, gitdir->buf + gitdir_offset); |
1025 | ||
16ac8b8d | 1026 | strbuf_reset(&dir); |
d3fb71b3 | 1027 | strbuf_addf(&dir, "%s/config", commondir->buf + commondir_offset); |
16ac8b8d JS |
1028 | read_repository_format(&candidate, dir.buf); |
1029 | strbuf_release(&dir); | |
1030 | ||
1031 | if (verify_repository_format(&candidate, &err) < 0) { | |
1032 | warning("ignoring git dir '%s': %s", | |
1033 | gitdir->buf + gitdir_offset, err.buf); | |
1034 | strbuf_release(&err); | |
d3fb71b3 | 1035 | strbuf_setlen(commondir, commondir_offset); |
69743f9b | 1036 | strbuf_setlen(gitdir, gitdir_offset); |
d3fb71b3 | 1037 | return -1; |
16ac8b8d JS |
1038 | } |
1039 | ||
d3fb71b3 | 1040 | return 0; |
16ac8b8d JS |
1041 | } |
1042 | ||
a60645f9 NTND |
1043 | const char *setup_git_directory_gently(int *nongit_ok) |
1044 | { | |
ce9b8aab JS |
1045 | static struct strbuf cwd = STRBUF_INIT; |
1046 | struct strbuf dir = STRBUF_INIT, gitdir = STRBUF_INIT; | |
07098b81 | 1047 | const char *prefix = NULL; |
abade65b | 1048 | struct repository_format repo_fmt; |
a60645f9 | 1049 | |
ce9b8aab JS |
1050 | /* |
1051 | * We may have read an incomplete configuration before | |
1052 | * setting-up the git directory. If so, clear the cache so | |
1053 | * that the next queries to the configuration reload complete | |
1054 | * configuration (including the per-repo config file that we | |
1055 | * ignored previously). | |
1056 | */ | |
1057 | git_config_clear(); | |
1058 | ||
1059 | /* | |
1060 | * Let's assume that we are in a git repository. | |
1061 | * If it turns out later that we are somewhere else, the value will be | |
1062 | * updated accordingly. | |
1063 | */ | |
1064 | if (nongit_ok) | |
1065 | *nongit_ok = 0; | |
1066 | ||
1067 | if (strbuf_getcwd(&cwd)) | |
1068 | die_errno(_("Unable to read current working directory")); | |
1069 | strbuf_addbuf(&dir, &cwd); | |
1070 | ||
01017dce | 1071 | switch (setup_git_directory_gently_1(&dir, &gitdir, 1)) { |
ce9b8aab | 1072 | case GIT_DIR_EXPLICIT: |
abade65b | 1073 | prefix = setup_explicit_git_dir(gitdir.buf, &cwd, &repo_fmt, nongit_ok); |
ce9b8aab JS |
1074 | break; |
1075 | case GIT_DIR_DISCOVERED: | |
1076 | if (dir.len < cwd.len && chdir(dir.buf)) | |
fc045fe7 | 1077 | die(_("cannot change to '%s'"), dir.buf); |
ce9b8aab | 1078 | prefix = setup_discovered_git_dir(gitdir.buf, &cwd, dir.len, |
abade65b | 1079 | &repo_fmt, nongit_ok); |
ce9b8aab JS |
1080 | break; |
1081 | case GIT_DIR_BARE: | |
1082 | if (dir.len < cwd.len && chdir(dir.buf)) | |
fc045fe7 | 1083 | die(_("cannot change to '%s'"), dir.buf); |
abade65b | 1084 | prefix = setup_bare_git_dir(&cwd, dir.len, &repo_fmt, nongit_ok); |
ce9b8aab JS |
1085 | break; |
1086 | case GIT_DIR_HIT_CEILING: | |
07098b81 ED |
1087 | if (!nongit_ok) |
1088 | die(_("not a git repository (or any of the parent directories): %s"), | |
1089 | DEFAULT_GIT_DIR_ENVIRONMENT); | |
1090 | *nongit_ok = 1; | |
ce9b8aab JS |
1091 | break; |
1092 | case GIT_DIR_HIT_MOUNT_POINT: | |
07098b81 ED |
1093 | if (!nongit_ok) |
1094 | die(_("not a git repository (or any parent up to mount point %s)\n" | |
1095 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."), | |
1096 | dir.buf); | |
1097 | *nongit_ok = 1; | |
1098 | break; | |
1099 | case GIT_DIR_NONE: | |
1100 | /* | |
1101 | * As a safeguard against setup_git_directory_gently_1 returning | |
1102 | * this value, fallthrough to BUG. Otherwise it is possible to | |
1103 | * set startup_info->have_repository to 1 when we did nothing to | |
1104 | * find a repository. | |
1105 | */ | |
ce9b8aab | 1106 | default: |
033abf97 | 1107 | BUG("unhandled setup_git_directory_1() result"); |
ce9b8aab JS |
1108 | } |
1109 | ||
07098b81 ED |
1110 | /* |
1111 | * At this point, nongit_ok is stable. If it is non-NULL and points | |
1112 | * to a non-zero value, then this means that we haven't found a | |
1113 | * repository and that the caller expects startup_info to reflect | |
1114 | * this. | |
1115 | * | |
1116 | * Regardless of the state of nongit_ok, startup_info->prefix and | |
1117 | * the GIT_PREFIX environment variable must always match. For details | |
1118 | * see Documentation/config/alias.txt. | |
1119 | */ | |
1120 | if (nongit_ok && *nongit_ok) { | |
1121 | startup_info->have_repository = 0; | |
1122 | startup_info->prefix = NULL; | |
a6f7f9a3 | 1123 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); |
07098b81 ED |
1124 | } else { |
1125 | startup_info->have_repository = 1; | |
1126 | startup_info->prefix = prefix; | |
1127 | if (prefix) | |
1128 | setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1); | |
1129 | else | |
1130 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); | |
1131 | } | |
46c3cd44 | 1132 | |
73f192c9 BW |
1133 | /* |
1134 | * Not all paths through the setup code will call 'set_git_dir()' (which | |
1135 | * directly sets up the environment) so in order to guarantee that the | |
1136 | * environment is in a consistent state after setup, explicitly setup | |
1137 | * the environment if we have a repository. | |
1138 | * | |
1139 | * NEEDSWORK: currently we allow bogus GIT_DIR values to be set in some | |
1140 | * code paths so we also need to explicitly setup the environment if | |
1141 | * the user has set GIT_DIR. It may be beneficial to disallow bogus | |
1142 | * GIT_DIR values at some point in the future. | |
1143 | */ | |
07098b81 ED |
1144 | if (/* GIT_DIR_EXPLICIT, GIT_DIR_DISCOVERED, GIT_DIR_BARE */ |
1145 | startup_info->have_repository || | |
1146 | /* GIT_DIR_EXPLICIT */ | |
1147 | getenv(GIT_DIR_ENVIRONMENT)) { | |
c14c234f BW |
1148 | if (!the_repository->gitdir) { |
1149 | const char *gitdir = getenv(GIT_DIR_ENVIRONMENT); | |
1150 | if (!gitdir) | |
1151 | gitdir = DEFAULT_GIT_DIR_ENVIRONMENT; | |
357a03eb | 1152 | setup_git_env(gitdir); |
c14c234f | 1153 | } |
78a67668 | 1154 | if (startup_info->have_repository) |
1155 | repo_set_hash_algo(the_repository, repo_fmt.hash_algo); | |
c14c234f | 1156 | } |
73f192c9 | 1157 | |
ce9b8aab JS |
1158 | strbuf_release(&dir); |
1159 | strbuf_release(&gitdir); | |
1160 | ||
a60645f9 NTND |
1161 | return prefix; |
1162 | } | |
1163 | ||
94df2506 JH |
1164 | int git_config_perm(const char *var, const char *value) |
1165 | { | |
06cbe855 HO |
1166 | int i; |
1167 | char *endptr; | |
1168 | ||
1169 | if (value == NULL) | |
1170 | return PERM_GROUP; | |
1171 | ||
1172 | if (!strcmp(value, "umask")) | |
1173 | return PERM_UMASK; | |
1174 | if (!strcmp(value, "group")) | |
1175 | return PERM_GROUP; | |
1176 | if (!strcmp(value, "all") || | |
1177 | !strcmp(value, "world") || | |
1178 | !strcmp(value, "everybody")) | |
1179 | return PERM_EVERYBODY; | |
1180 | ||
1181 | /* Parse octal numbers */ | |
1182 | i = strtol(value, &endptr, 8); | |
1183 | ||
1184 | /* If not an octal number, maybe true/false? */ | |
1185 | if (*endptr != 0) | |
1186 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
1187 | ||
1188 | /* | |
1189 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 1190 | * a chmod value to restrict to. |
06cbe855 HO |
1191 | */ |
1192 | switch (i) { | |
1193 | case PERM_UMASK: /* 0 */ | |
1194 | return PERM_UMASK; | |
1195 | case OLD_PERM_GROUP: /* 1 */ | |
1196 | return PERM_GROUP; | |
1197 | case OLD_PERM_EVERYBODY: /* 2 */ | |
1198 | return PERM_EVERYBODY; | |
94df2506 | 1199 | } |
06cbe855 HO |
1200 | |
1201 | /* A filemode value was given: 0xxx */ | |
1202 | ||
1203 | if ((i & 0600) != 0600) | |
fc045fe7 | 1204 | die(_("problem with core.sharedRepository filemode value " |
06cbe855 | 1205 | "(0%.3o).\nThe owner of files must always have " |
2ff30e67 | 1206 | "read and write permissions."), i); |
06cbe855 HO |
1207 | |
1208 | /* | |
1209 | * Mask filemode value. Others can not get write permission. | |
1210 | * x flags for directories are handled separately. | |
1211 | */ | |
5a688fe4 | 1212 | return -(i & 0666); |
94df2506 JH |
1213 | } |
1214 | ||
4b0d1eeb | 1215 | void check_repository_format(void) |
ab9cb76f | 1216 | { |
abade65b | 1217 | struct repository_format repo_fmt; |
1218 | check_repository_format_gently(get_git_dir(), &repo_fmt, NULL); | |
f1c126bd | 1219 | startup_info->have_repository = 1; |
ab9cb76f JH |
1220 | } |
1221 | ||
e1e5ec86 CB |
1222 | /* |
1223 | * Returns the "prefix", a path to the current working directory | |
1224 | * relative to the work tree root, or NULL, if the current working | |
1225 | * directory is not a strict subdirectory of the work tree root. The | |
1226 | * prefix always ends with a '/' character. | |
1227 | */ | |
5e7bfe25 JH |
1228 | const char *setup_git_directory(void) |
1229 | { | |
b3f66fd3 | 1230 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 1231 | } |
abc06822 | 1232 | |
40d96325 | 1233 | const char *resolve_gitdir_gently(const char *suspect, int *return_error_code) |
abc06822 FG |
1234 | { |
1235 | if (is_git_directory(suspect)) | |
1236 | return suspect; | |
40d96325 | 1237 | return read_gitfile_gently(suspect, return_error_code); |
abc06822 | 1238 | } |
1d999ddd TR |
1239 | |
1240 | /* if any standard file descriptor is missing open it to /dev/null */ | |
1241 | void sanitize_stdfds(void) | |
1242 | { | |
1243 | int fd = open("/dev/null", O_RDWR, 0); | |
1244 | while (fd != -1 && fd < 2) | |
1245 | fd = dup(fd); | |
1246 | if (fd == -1) | |
fc045fe7 | 1247 | die_errno(_("open /dev/null or dup failed")); |
1d999ddd TR |
1248 | if (fd > 2) |
1249 | close(fd); | |
1250 | } | |
de0957ce NTND |
1251 | |
1252 | int daemonize(void) | |
1253 | { | |
1254 | #ifdef NO_POSIX_GOODIES | |
1255 | errno = ENOSYS; | |
1256 | return -1; | |
1257 | #else | |
1258 | switch (fork()) { | |
1259 | case 0: | |
1260 | break; | |
1261 | case -1: | |
fc045fe7 | 1262 | die_errno(_("fork failed")); |
de0957ce NTND |
1263 | default: |
1264 | exit(0); | |
1265 | } | |
1266 | if (setsid() == -1) | |
fc045fe7 | 1267 | die_errno(_("setsid failed")); |
de0957ce NTND |
1268 | close(0); |
1269 | close(1); | |
1270 | close(2); | |
1271 | sanitize_stdfds(); | |
1272 | return 0; | |
1273 | #endif | |
1274 | } |