]>
Commit | Line | Data |
---|---|---|
d288a700 | 1 | #include "cache.h" |
b2141fc1 | 2 | #include "config.h" |
e90fdc39 | 3 | #include "dir.h" |
31171d9e | 4 | #include "string-list.h" |
e90fdc39 JS |
5 | |
6 | static int inside_git_dir = -1; | |
7 | static int inside_work_tree = -1; | |
fada7674 | 8 | static int work_tree_config_is_bogus; |
d288a700 | 9 | |
46c3cd44 JK |
10 | static struct startup_info the_startup_info; |
11 | struct startup_info *startup_info = &the_startup_info; | |
12 | ||
ddc2a628 MEW |
13 | /* |
14 | * The input parameter must contain an absolute path, and it must already be | |
15 | * normalized. | |
16 | * | |
17 | * Find the part of an absolute path that lies inside the work tree by | |
18 | * dereferencing symlinks outside the work tree, for example: | |
19 | * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file | |
20 | * /dir/file (work tree is /) -> dir/file | |
21 | * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2 | |
22 | * /dir/repolink/file (repolink points to /dir/repo) -> file | |
23 | * /dir/repo (exactly equal to work tree) -> (empty string) | |
24 | */ | |
25 | static int abspath_part_inside_repo(char *path) | |
26 | { | |
27 | size_t len; | |
28 | size_t wtlen; | |
29 | char *path0; | |
30 | int off; | |
31 | const char *work_tree = get_git_work_tree(); | |
32 | ||
33 | if (!work_tree) | |
34 | return -1; | |
35 | wtlen = strlen(work_tree); | |
36 | len = strlen(path); | |
6127ff63 | 37 | off = offset_1st_component(path); |
ddc2a628 MEW |
38 | |
39 | /* check if work tree is already the prefix */ | |
40 | if (wtlen <= len && !strncmp(path, work_tree, wtlen)) { | |
41 | if (path[wtlen] == '/') { | |
42 | memmove(path, path + wtlen + 1, len - wtlen); | |
43 | return 0; | |
44 | } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') { | |
45 | /* work tree is the root, or the whole path */ | |
46 | memmove(path, path + wtlen, len - wtlen + 1); | |
47 | return 0; | |
48 | } | |
49 | /* work tree might match beginning of a symlink to work tree */ | |
50 | off = wtlen; | |
51 | } | |
52 | path0 = path; | |
6127ff63 | 53 | path += off; |
ddc2a628 MEW |
54 | |
55 | /* check each '/'-terminated level */ | |
56 | while (*path) { | |
57 | path++; | |
58 | if (*path == '/') { | |
59 | *path = '\0'; | |
60 | if (strcmp(real_path(path0), work_tree) == 0) { | |
61 | memmove(path0, path + 1, len - (path - path0)); | |
62 | return 0; | |
63 | } | |
64 | *path = '/'; | |
65 | } | |
66 | } | |
67 | ||
68 | /* check whole path */ | |
69 | if (strcmp(real_path(path0), work_tree) == 0) { | |
70 | *path0 = '\0'; | |
71 | return 0; | |
72 | } | |
73 | ||
74 | return -1; | |
75 | } | |
76 | ||
645a29c4 NTND |
77 | /* |
78 | * Normalize "path", prepending the "prefix" for relative paths. If | |
79 | * remaining_prefix is not NULL, return the actual prefix still | |
80 | * remains in the path. For example, prefix = sub1/sub2/ and path is | |
81 | * | |
82 | * foo -> sub1/sub2/foo (full prefix) | |
83 | * ../foo -> sub1/foo (remaining prefix is sub1/) | |
84 | * ../../bar -> bar (no remaining prefix) | |
85 | * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix) | |
86 | * `pwd`/../bar -> sub1/bar (no remaining prefix) | |
87 | */ | |
88 | char *prefix_path_gently(const char *prefix, int len, | |
89 | int *remaining_prefix, const char *path) | |
d089ebaa JH |
90 | { |
91 | const char *orig = path; | |
18e051a3 CMAB |
92 | char *sanitized; |
93 | if (is_absolute_path(orig)) { | |
3733e694 | 94 | sanitized = xmallocz(strlen(path)); |
645a29c4 NTND |
95 | if (remaining_prefix) |
96 | *remaining_prefix = 0; | |
655ee9ea MEW |
97 | if (normalize_path_copy_len(sanitized, path, remaining_prefix)) { |
98 | free(sanitized); | |
99 | return NULL; | |
100 | } | |
101 | if (abspath_part_inside_repo(sanitized)) { | |
102 | free(sanitized); | |
103 | return NULL; | |
104 | } | |
18e051a3 | 105 | } else { |
24041d6b | 106 | sanitized = xstrfmt("%.*s%s", len, len ? prefix : "", path); |
645a29c4 NTND |
107 | if (remaining_prefix) |
108 | *remaining_prefix = len; | |
655ee9ea | 109 | if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) { |
546e0fd9 JK |
110 | free(sanitized); |
111 | return NULL; | |
d089ebaa | 112 | } |
d089ebaa JH |
113 | } |
114 | return sanitized; | |
f332726e LT |
115 | } |
116 | ||
546e0fd9 JK |
117 | char *prefix_path(const char *prefix, int len, const char *path) |
118 | { | |
645a29c4 | 119 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
120 | if (!r) |
121 | die("'%s' is outside repository", path); | |
122 | return r; | |
123 | } | |
124 | ||
125 | int path_inside_repo(const char *prefix, const char *path) | |
126 | { | |
127 | int len = prefix ? strlen(prefix) : 0; | |
645a29c4 | 128 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
129 | if (r) { |
130 | free(r); | |
131 | return 1; | |
132 | } | |
133 | return 0; | |
134 | } | |
135 | ||
c6e8c800 JH |
136 | int check_filename(const char *prefix, const char *arg) |
137 | { | |
e4da43b1 | 138 | char *to_free = NULL; |
c6e8c800 JH |
139 | struct stat st; |
140 | ||
d51c6ee0 JK |
141 | if (skip_prefix(arg, ":/", &arg)) { |
142 | if (!*arg) /* ":/" is root dir, always exists */ | |
4db86e8b | 143 | return 1; |
a08cbcda | 144 | prefix = NULL; |
42471bce JK |
145 | } else if (skip_prefix(arg, ":!", &arg) || |
146 | skip_prefix(arg, ":^", &arg)) { | |
147 | if (!*arg) /* excluding everything is silly, but allowed */ | |
148 | return 1; | |
a08cbcda JK |
149 | } |
150 | ||
151 | if (prefix) | |
152 | arg = to_free = prefix_filename(prefix, arg); | |
153 | ||
154 | if (!lstat(arg, &st)) { | |
e4da43b1 | 155 | free(to_free); |
c6e8c800 | 156 | return 1; /* file exists */ |
e4da43b1 | 157 | } |
93dd544f | 158 | if (is_missing_file_error(errno)) { |
e4da43b1 | 159 | free(to_free); |
c6e8c800 | 160 | return 0; /* file does not exist */ |
e4da43b1 | 161 | } |
c6e8c800 JH |
162 | die_errno("failed to stat '%s'", arg); |
163 | } | |
164 | ||
023e37c3 MM |
165 | static void NORETURN die_verify_filename(const char *prefix, |
166 | const char *arg, | |
167 | int diagnose_misspelt_rev) | |
009fee47 | 168 | { |
023e37c3 | 169 | if (!diagnose_misspelt_rev) |
ab33a76e VA |
170 | die(_("%s: no such path in the working tree.\n" |
171 | "Use 'git <command> -- <path>...' to specify paths that do not exist locally."), | |
023e37c3 | 172 | arg); |
0e539dca JH |
173 | /* |
174 | * Saying "'(icase)foo' does not exist in the index" when the | |
175 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
176 | * begins with a colon and is followed by a non-alnum; do not | |
8c135ea2 | 177 | * let maybe_die_on_misspelt_object_name() even trigger. |
0e539dca JH |
178 | */ |
179 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
8c135ea2 | 180 | maybe_die_on_misspelt_object_name(arg, prefix); |
0e539dca | 181 | |
009fee47 | 182 | /* ... or fall back the most general message. */ |
ab33a76e VA |
183 | die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n" |
184 | "Use '--' to separate paths from revisions, like this:\n" | |
185 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
009fee47 MM |
186 | |
187 | } | |
188 | ||
c99eddd8 JK |
189 | /* |
190 | * Check for arguments that don't resolve as actual files, | |
191 | * but which look sufficiently like pathspecs that we'll consider | |
192 | * them such for the purposes of rev/pathspec DWIM parsing. | |
193 | */ | |
194 | static int looks_like_pathspec(const char *arg) | |
195 | { | |
196 | /* anything with a wildcard character */ | |
197 | if (!no_wildcard(arg)) | |
198 | return 1; | |
199 | ||
200 | /* long-form pathspec magic */ | |
201 | if (starts_with(arg, ":(")) | |
202 | return 1; | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
e23d0b4a LT |
207 | /* |
208 | * Verify a filename that we got as an argument for a pathspec | |
209 | * entry. Note that a filename that begins with "-" never verifies | |
210 | * as true, because even if such a filename were to exist, we want | |
211 | * it to be preceded by the "--" marker (or we want the user to | |
212 | * use a format like "./-filename") | |
023e37c3 MM |
213 | * |
214 | * The "diagnose_misspelt_rev" is used to provide a user-friendly | |
215 | * diagnosis when dying upon finding that "name" is not a pathname. | |
216 | * If set to 1, the diagnosis will try to diagnose "name" as an | |
217 | * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis | |
218 | * will only complain about an inexisting file. | |
219 | * | |
220 | * This function is typically called to check that a "file or rev" | |
221 | * argument is unambiguous. In this case, the caller will want | |
222 | * diagnose_misspelt_rev == 1 when verifying the first non-rev | |
223 | * argument (which could have been a revision), and | |
224 | * diagnose_misspelt_rev == 0 for the next ones (because we already | |
225 | * saw a filename, there's not ambiguity anymore). | |
e23d0b4a | 226 | */ |
023e37c3 MM |
227 | void verify_filename(const char *prefix, |
228 | const char *arg, | |
229 | int diagnose_misspelt_rev) | |
e23d0b4a | 230 | { |
e23d0b4a LT |
231 | if (*arg == '-') |
232 | die("bad flag '%s' used after filename", arg); | |
2cb47ab6 | 233 | if (looks_like_pathspec(arg) || check_filename(prefix, arg)) |
e23d0b4a | 234 | return; |
023e37c3 | 235 | die_verify_filename(prefix, arg, diagnose_misspelt_rev); |
e23d0b4a LT |
236 | } |
237 | ||
ea92f41f JH |
238 | /* |
239 | * Opposite of the above: the command line did not have -- marker | |
240 | * and we parsed the arg as a refname. It should not be interpretable | |
241 | * as a filename. | |
242 | */ | |
243 | void verify_non_filename(const char *prefix, const char *arg) | |
244 | { | |
7ae3df8c | 245 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 246 | return; |
ea92f41f JH |
247 | if (*arg == '-') |
248 | return; /* flag */ | |
c6e8c800 JH |
249 | if (!check_filename(prefix, arg)) |
250 | return; | |
ab33a76e VA |
251 | die(_("ambiguous argument '%s': both revision and filename\n" |
252 | "Use '--' to separate paths from revisions, like this:\n" | |
253 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
ea92f41f JH |
254 | } |
255 | ||
31e26ebc | 256 | int get_common_dir(struct strbuf *sb, const char *gitdir) |
11f9dd71 MK |
257 | { |
258 | const char *git_env_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT); | |
259 | if (git_env_common_dir) { | |
260 | strbuf_addstr(sb, git_env_common_dir); | |
261 | return 1; | |
262 | } else { | |
263 | return get_common_dir_noenv(sb, gitdir); | |
264 | } | |
265 | } | |
266 | ||
267 | int get_common_dir_noenv(struct strbuf *sb, const char *gitdir) | |
4dc4e145 NTND |
268 | { |
269 | struct strbuf data = STRBUF_INIT; | |
270 | struct strbuf path = STRBUF_INIT; | |
31e26ebc | 271 | int ret = 0; |
11f9dd71 | 272 | |
4dc4e145 NTND |
273 | strbuf_addf(&path, "%s/commondir", gitdir); |
274 | if (file_exists(path.buf)) { | |
275 | if (strbuf_read_file(&data, path.buf, 0) <= 0) | |
276 | die_errno(_("failed to read %s"), path.buf); | |
277 | while (data.len && (data.buf[data.len - 1] == '\n' || | |
278 | data.buf[data.len - 1] == '\r')) | |
279 | data.len--; | |
280 | data.buf[data.len] = '\0'; | |
281 | strbuf_reset(&path); | |
282 | if (!is_absolute_path(data.buf)) | |
283 | strbuf_addf(&path, "%s/", gitdir); | |
284 | strbuf_addbuf(&path, &data); | |
33ad9ddd | 285 | strbuf_add_real_path(sb, path.buf); |
31e26ebc | 286 | ret = 1; |
4ac9006f | 287 | } else { |
4dc4e145 | 288 | strbuf_addstr(sb, gitdir); |
4ac9006f BW |
289 | } |
290 | ||
4dc4e145 NTND |
291 | strbuf_release(&data); |
292 | strbuf_release(&path); | |
31e26ebc | 293 | return ret; |
4dc4e145 | 294 | } |
d288a700 | 295 | |
5f5608bc | 296 | /* |
ad1a382f | 297 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 298 | * We want to see: |
5f5608bc | 299 | * |
790296fd | 300 | * - either an objects/ directory _or_ the proper |
5f5608bc | 301 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 302 | * - a refs/ directory |
8098a178 | 303 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
304 | * a proper "ref:", or a regular file HEAD that has a properly |
305 | * formatted sha1 object name. | |
5f5608bc | 306 | */ |
b3256eb8 | 307 | int is_git_directory(const char *suspect) |
5f5608bc | 308 | { |
1d186b6f NTND |
309 | struct strbuf path = STRBUF_INIT; |
310 | int ret = 0; | |
311 | size_t len; | |
ad1a382f | 312 | |
4dc4e145 NTND |
313 | /* Check worktree-related signatures */ |
314 | strbuf_addf(&path, "%s/HEAD", suspect); | |
315 | if (validate_headref(path.buf)) | |
316 | goto done; | |
317 | ||
318 | strbuf_reset(&path); | |
319 | get_common_dir(&path, suspect); | |
1d186b6f | 320 | len = path.len; |
4dc4e145 NTND |
321 | |
322 | /* Check non-worktree-related signatures */ | |
ad1a382f SP |
323 | if (getenv(DB_ENVIRONMENT)) { |
324 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
1d186b6f | 325 | goto done; |
ad1a382f SP |
326 | } |
327 | else { | |
4dc4e145 | 328 | strbuf_setlen(&path, len); |
1d186b6f NTND |
329 | strbuf_addstr(&path, "/objects"); |
330 | if (access(path.buf, X_OK)) | |
331 | goto done; | |
ad1a382f SP |
332 | } |
333 | ||
1d186b6f NTND |
334 | strbuf_setlen(&path, len); |
335 | strbuf_addstr(&path, "/refs"); | |
336 | if (access(path.buf, X_OK)) | |
337 | goto done; | |
ad1a382f | 338 | |
1d186b6f NTND |
339 | ret = 1; |
340 | done: | |
341 | strbuf_release(&path); | |
342 | return ret; | |
5f5608bc LT |
343 | } |
344 | ||
ffd036b1 JK |
345 | int is_nonbare_repository_dir(struct strbuf *path) |
346 | { | |
347 | int ret = 0; | |
348 | int gitfile_error; | |
349 | size_t orig_path_len = path->len; | |
350 | assert(orig_path_len != 0); | |
351 | strbuf_complete(path, '/'); | |
352 | strbuf_addstr(path, ".git"); | |
353 | if (read_gitfile_gently(path->buf, &gitfile_error) || is_git_directory(path->buf)) | |
354 | ret = 1; | |
355 | if (gitfile_error == READ_GITFILE_ERR_OPEN_FAILED || | |
356 | gitfile_error == READ_GITFILE_ERR_READ_FAILED) | |
357 | ret = 1; | |
358 | strbuf_setlen(path, orig_path_len); | |
359 | return ret; | |
360 | } | |
361 | ||
68025633 JS |
362 | int is_inside_git_dir(void) |
363 | { | |
e90fdc39 JS |
364 | if (inside_git_dir < 0) |
365 | inside_git_dir = is_inside_dir(get_git_dir()); | |
366 | return inside_git_dir; | |
892c41b9 ML |
367 | } |
368 | ||
892c41b9 ML |
369 | int is_inside_work_tree(void) |
370 | { | |
e90fdc39 JS |
371 | if (inside_work_tree < 0) |
372 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
373 | return inside_work_tree; | |
892c41b9 ML |
374 | } |
375 | ||
f3fa1838 JH |
376 | void setup_work_tree(void) |
377 | { | |
354e6534 JS |
378 | const char *work_tree, *git_dir; |
379 | static int initialized = 0; | |
380 | ||
381 | if (initialized) | |
382 | return; | |
fada7674 JK |
383 | |
384 | if (work_tree_config_is_bogus) | |
385 | die("unable to set up work tree using invalid config"); | |
386 | ||
354e6534 JS |
387 | work_tree = get_git_work_tree(); |
388 | git_dir = get_git_dir(); | |
59f0f2f3 | 389 | if (!is_absolute_path(git_dir)) |
e2a57aac | 390 | git_dir = real_path(get_git_dir()); |
59f0f2f3 MH |
391 | if (!work_tree || chdir(work_tree)) |
392 | die("This operation must be run in a work tree"); | |
0ed74813 NTND |
393 | |
394 | /* | |
395 | * Make sure subsequent git processes find correct worktree | |
396 | * if $GIT_WORK_TREE is set relative | |
397 | */ | |
398 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
399 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
400 | ||
41894ae3 | 401 | set_git_dir(remove_leading_path(git_dir, work_tree)); |
354e6534 | 402 | initialized = 1; |
59f0f2f3 MH |
403 | } |
404 | ||
2cc7c2c7 | 405 | static int check_repo_format(const char *var, const char *value, void *vdata) |
31e26ebc | 406 | { |
2cc7c2c7 | 407 | struct repository_format *data = vdata; |
00a09d57 JK |
408 | const char *ext; |
409 | ||
31e26ebc | 410 | if (strcmp(var, "core.repositoryformatversion") == 0) |
2cc7c2c7 | 411 | data->version = git_config_int(var, value); |
00a09d57 JK |
412 | else if (skip_prefix(var, "extensions.", &ext)) { |
413 | /* | |
414 | * record any known extensions here; otherwise, | |
415 | * we fall through to recording it as unknown, and | |
416 | * check_repository_format will complain | |
417 | */ | |
418 | if (!strcmp(ext, "noop")) | |
419 | ; | |
067fbd41 | 420 | else if (!strcmp(ext, "preciousobjects")) |
2cc7c2c7 | 421 | data->precious_objects = git_config_bool(var, value); |
00a09d57 | 422 | else |
2cc7c2c7 | 423 | string_list_append(&data->unknown_extensions, ext); |
652f18ee JK |
424 | } else if (strcmp(var, "core.bare") == 0) { |
425 | data->is_bare = git_config_bool(var, value); | |
426 | } else if (strcmp(var, "core.worktree") == 0) { | |
427 | if (!value) | |
428 | return config_error_nonbool(var); | |
429 | data->work_tree = xstrdup(value); | |
00a09d57 | 430 | } |
31e26ebc NTND |
431 | return 0; |
432 | } | |
433 | ||
337e51ce | 434 | static int check_repository_format_gently(const char *gitdir, int *nongit_ok) |
9459aa77 | 435 | { |
7d0fb0da | 436 | struct strbuf sb = STRBUF_INIT; |
2cc7c2c7 JK |
437 | struct strbuf err = STRBUF_INIT; |
438 | struct repository_format candidate; | |
652f18ee | 439 | int has_common; |
00a09d57 | 440 | |
652f18ee | 441 | has_common = get_common_dir(&sb, gitdir); |
e61a509a | 442 | strbuf_addstr(&sb, "/config"); |
652f18ee | 443 | read_repository_format(&candidate, sb.buf); |
2cc7c2c7 | 444 | strbuf_release(&sb); |
e61a509a | 445 | |
337e51ce | 446 | /* |
2cc7c2c7 JK |
447 | * For historical use of check_repository_format() in git-init, |
448 | * we treat a missing config as a silent "ok", even when nongit_ok | |
449 | * is unset. | |
337e51ce | 450 | */ |
2cc7c2c7 JK |
451 | if (candidate.version < 0) |
452 | return 0; | |
453 | ||
454 | if (verify_repository_format(&candidate, &err) < 0) { | |
455 | if (nongit_ok) { | |
456 | warning("%s", err.buf); | |
457 | strbuf_release(&err); | |
458 | *nongit_ok = -1; | |
459 | return -1; | |
460 | } | |
461 | die("%s", err.buf); | |
462 | } | |
463 | ||
2cc7c2c7 JK |
464 | repository_format_precious_objects = candidate.precious_objects; |
465 | string_list_clear(&candidate.unknown_extensions, 0); | |
652f18ee JK |
466 | if (!has_common) { |
467 | if (candidate.is_bare != -1) { | |
468 | is_bare_repository_cfg = candidate.is_bare; | |
469 | if (is_bare_repository_cfg == 1) | |
470 | inside_work_tree = -1; | |
471 | } | |
472 | if (candidate.work_tree) { | |
473 | free(git_work_tree_cfg); | |
474 | git_work_tree_cfg = candidate.work_tree; | |
2cc7c2c7 | 475 | inside_work_tree = -1; |
652f18ee JK |
476 | } |
477 | } else { | |
478 | free(candidate.work_tree); | |
2cc7c2c7 JK |
479 | } |
480 | ||
481 | return 0; | |
482 | } | |
483 | ||
652f18ee | 484 | int read_repository_format(struct repository_format *format, const char *path) |
2cc7c2c7 JK |
485 | { |
486 | memset(format, 0, sizeof(*format)); | |
487 | format->version = -1; | |
488 | format->is_bare = -1; | |
489 | string_list_init(&format->unknown_extensions, 1); | |
652f18ee | 490 | git_config_from_file(check_repo_format, path, format); |
2cc7c2c7 JK |
491 | return format->version; |
492 | } | |
493 | ||
2cc7c2c7 JK |
494 | int verify_repository_format(const struct repository_format *format, |
495 | struct strbuf *err) | |
496 | { | |
497 | if (GIT_REPO_VERSION_READ < format->version) { | |
274db840 | 498 | strbuf_addf(err, _("Expected git repo version <= %d, found %d"), |
2cc7c2c7 JK |
499 | GIT_REPO_VERSION_READ, format->version); |
500 | return -1; | |
501 | } | |
502 | ||
503 | if (format->version >= 1 && format->unknown_extensions.nr) { | |
00a09d57 JK |
504 | int i; |
505 | ||
274db840 | 506 | strbuf_addstr(err, _("unknown repository extensions found:")); |
00a09d57 | 507 | |
2cc7c2c7 JK |
508 | for (i = 0; i < format->unknown_extensions.nr; i++) |
509 | strbuf_addf(err, "\n\t%s", | |
510 | format->unknown_extensions.items[i].string); | |
511 | return -1; | |
00a09d57 JK |
512 | } |
513 | ||
2cc7c2c7 | 514 | return 0; |
9459aa77 NTND |
515 | } |
516 | ||
5f29433f SB |
517 | void read_gitfile_error_die(int error_code, const char *path, const char *dir) |
518 | { | |
519 | switch (error_code) { | |
520 | case READ_GITFILE_ERR_STAT_FAILED: | |
521 | case READ_GITFILE_ERR_NOT_A_FILE: | |
522 | /* non-fatal; follow return path */ | |
523 | break; | |
524 | case READ_GITFILE_ERR_OPEN_FAILED: | |
525 | die_errno("Error opening '%s'", path); | |
526 | case READ_GITFILE_ERR_TOO_LARGE: | |
527 | die("Too large to be a .git file: '%s'", path); | |
528 | case READ_GITFILE_ERR_READ_FAILED: | |
529 | die("Error reading %s", path); | |
530 | case READ_GITFILE_ERR_INVALID_FORMAT: | |
531 | die("Invalid gitfile format: %s", path); | |
532 | case READ_GITFILE_ERR_NO_PATH: | |
533 | die("No path in gitfile: %s", path); | |
534 | case READ_GITFILE_ERR_NOT_A_REPO: | |
535 | die("Not a git repository: %s", dir); | |
536 | default: | |
537 | die("BUG: unknown error code"); | |
538 | } | |
539 | } | |
540 | ||
b44ebb19 LH |
541 | /* |
542 | * Try to read the location of the git directory from the .git file, | |
543 | * return path to git directory if found. | |
a93bedad EE |
544 | * |
545 | * On failure, if return_error_code is not NULL, return_error_code | |
546 | * will be set to an error code and NULL will be returned. If | |
547 | * return_error_code is NULL the function will die instead (for most | |
548 | * cases). | |
b44ebb19 | 549 | */ |
a93bedad | 550 | const char *read_gitfile_gently(const char *path, int *return_error_code) |
b44ebb19 | 551 | { |
921bdd96 | 552 | const int max_file_size = 1 << 20; /* 1MB */ |
a93bedad EE |
553 | int error_code = 0; |
554 | char *buf = NULL; | |
555 | char *dir = NULL; | |
40c813e0 | 556 | const char *slash; |
b44ebb19 LH |
557 | struct stat st; |
558 | int fd; | |
b1905aea | 559 | ssize_t len; |
b44ebb19 | 560 | |
a93bedad | 561 | if (stat(path, &st)) { |
5c4003ca | 562 | /* NEEDSWORK: discern between ENOENT vs other errors */ |
a93bedad EE |
563 | error_code = READ_GITFILE_ERR_STAT_FAILED; |
564 | goto cleanup_return; | |
565 | } | |
566 | if (!S_ISREG(st.st_mode)) { | |
567 | error_code = READ_GITFILE_ERR_NOT_A_FILE; | |
568 | goto cleanup_return; | |
569 | } | |
921bdd96 EE |
570 | if (st.st_size > max_file_size) { |
571 | error_code = READ_GITFILE_ERR_TOO_LARGE; | |
572 | goto cleanup_return; | |
573 | } | |
b44ebb19 | 574 | fd = open(path, O_RDONLY); |
a93bedad EE |
575 | if (fd < 0) { |
576 | error_code = READ_GITFILE_ERR_OPEN_FAILED; | |
577 | goto cleanup_return; | |
578 | } | |
3733e694 | 579 | buf = xmallocz(st.st_size); |
b44ebb19 LH |
580 | len = read_in_full(fd, buf, st.st_size); |
581 | close(fd); | |
a93bedad EE |
582 | if (len != st.st_size) { |
583 | error_code = READ_GITFILE_ERR_READ_FAILED; | |
584 | goto cleanup_return; | |
585 | } | |
a93bedad EE |
586 | if (!starts_with(buf, "gitdir: ")) { |
587 | error_code = READ_GITFILE_ERR_INVALID_FORMAT; | |
588 | goto cleanup_return; | |
589 | } | |
b44ebb19 LH |
590 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') |
591 | len--; | |
a93bedad EE |
592 | if (len < 9) { |
593 | error_code = READ_GITFILE_ERR_NO_PATH; | |
594 | goto cleanup_return; | |
595 | } | |
b44ebb19 | 596 | buf[len] = '\0'; |
40c813e0 BK |
597 | dir = buf + 8; |
598 | ||
599 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
600 | size_t pathlen = slash+1 - path; | |
75faa45a JK |
601 | dir = xstrfmt("%.*s%.*s", (int)pathlen, path, |
602 | (int)(len - 8), buf + 8); | |
40c813e0 BK |
603 | free(buf); |
604 | buf = dir; | |
605 | } | |
a93bedad EE |
606 | if (!is_git_directory(dir)) { |
607 | error_code = READ_GITFILE_ERR_NOT_A_REPO; | |
608 | goto cleanup_return; | |
609 | } | |
e2a57aac | 610 | path = real_path(dir); |
40c813e0 | 611 | |
a93bedad | 612 | cleanup_return: |
a93bedad EE |
613 | if (return_error_code) |
614 | *return_error_code = error_code; | |
5f29433f SB |
615 | else if (error_code) |
616 | read_gitfile_error_die(error_code, path, dir); | |
a93bedad | 617 | |
b44ebb19 | 618 | free(buf); |
38ae8784 | 619 | return error_code ? NULL : path; |
b44ebb19 LH |
620 | } |
621 | ||
e4e30347 | 622 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
7333ed17 | 623 | struct strbuf *cwd, |
b3f66fd3 | 624 | int *nongit_ok) |
e4e30347 | 625 | { |
b3f66fd3 NTND |
626 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
627 | const char *worktree; | |
628 | char *gitfile; | |
9b125da4 | 629 | int offset; |
e4e30347 JN |
630 | |
631 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
632 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
b3f66fd3 | 633 | |
13d6ec91 | 634 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
635 | if (gitfile) { |
636 | gitfile = xstrdup(gitfile); | |
637 | gitdirenv = gitfile; | |
638 | } | |
639 | ||
e4e30347 JN |
640 | if (!is_git_directory(gitdirenv)) { |
641 | if (nongit_ok) { | |
642 | *nongit_ok = 1; | |
b3f66fd3 | 643 | free(gitfile); |
e4e30347 JN |
644 | return NULL; |
645 | } | |
646 | die("Not a git repository: '%s'", gitdirenv); | |
647 | } | |
b3f66fd3 NTND |
648 | |
649 | if (check_repository_format_gently(gitdirenv, nongit_ok)) { | |
650 | free(gitfile); | |
651 | return NULL; | |
e4e30347 | 652 | } |
b3f66fd3 NTND |
653 | |
654 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
655 | if (work_tree_env) | |
656 | set_git_work_tree(work_tree_env); | |
657 | else if (is_bare_repository_cfg > 0) { | |
fada7674 JK |
658 | if (git_work_tree_cfg) { |
659 | /* #22.2, #30 */ | |
660 | warning("core.bare and core.worktree do not make sense"); | |
661 | work_tree_config_is_bogus = 1; | |
662 | } | |
b3f66fd3 NTND |
663 | |
664 | /* #18, #26 */ | |
665 | set_git_dir(gitdirenv); | |
666 | free(gitfile); | |
e4e30347 | 667 | return NULL; |
b3f66fd3 NTND |
668 | } |
669 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
670 | if (is_absolute_path(git_work_tree_cfg)) | |
671 | set_git_work_tree(git_work_tree_cfg); | |
672 | else { | |
56b9f6e7 | 673 | char *core_worktree; |
b3f66fd3 NTND |
674 | if (chdir(gitdirenv)) |
675 | die_errno("Could not chdir to '%s'", gitdirenv); | |
676 | if (chdir(git_work_tree_cfg)) | |
677 | die_errno("Could not chdir to '%s'", git_work_tree_cfg); | |
56b9f6e7 | 678 | core_worktree = xgetcwd(); |
7333ed17 | 679 | if (chdir(cwd->buf)) |
b3f66fd3 NTND |
680 | die_errno("Could not come back to cwd"); |
681 | set_git_work_tree(core_worktree); | |
56b9f6e7 | 682 | free(core_worktree); |
b3f66fd3 NTND |
683 | } |
684 | } | |
2cd83d10 JK |
685 | else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) { |
686 | /* #16d */ | |
687 | set_git_dir(gitdirenv); | |
688 | free(gitfile); | |
689 | return NULL; | |
690 | } | |
b3f66fd3 NTND |
691 | else /* #2, #10 */ |
692 | set_git_work_tree("."); | |
693 | ||
694 | /* set_git_work_tree() must have been called by now */ | |
695 | worktree = get_git_work_tree(); | |
696 | ||
697 | /* both get_git_work_tree() and cwd are already normalized */ | |
7333ed17 | 698 | if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */ |
b3f66fd3 NTND |
699 | set_git_dir(gitdirenv); |
700 | free(gitfile); | |
e4e30347 | 701 | return NULL; |
b3f66fd3 | 702 | } |
e4e30347 | 703 | |
7333ed17 | 704 | offset = dir_inside_of(cwd->buf, worktree); |
9b125da4 | 705 | if (offset >= 0) { /* cwd inside worktree? */ |
e2a57aac | 706 | set_git_dir(real_path(gitdirenv)); |
b3f66fd3 NTND |
707 | if (chdir(worktree)) |
708 | die_errno("Could not chdir to '%s'", worktree); | |
7333ed17 | 709 | strbuf_addch(cwd, '/'); |
b3f66fd3 | 710 | free(gitfile); |
7333ed17 | 711 | return cwd->buf + offset; |
93a00542 | 712 | } |
b3f66fd3 NTND |
713 | |
714 | /* cwd outside worktree */ | |
715 | set_git_dir(gitdirenv); | |
716 | free(gitfile); | |
717 | return NULL; | |
93a00542 JN |
718 | } |
719 | ||
9951d3b3 | 720 | static const char *setup_discovered_git_dir(const char *gitdir, |
7333ed17 | 721 | struct strbuf *cwd, int offset, |
9951d3b3 | 722 | int *nongit_ok) |
98937bef | 723 | { |
9951d3b3 NTND |
724 | if (check_repository_format_gently(gitdir, nongit_ok)) |
725 | return NULL; | |
98937bef | 726 | |
4868b2ea JN |
727 | /* --work-tree is set without --git-dir; use discovered one */ |
728 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
2d4dcf21 JS |
729 | char *to_free = NULL; |
730 | const char *ret; | |
731 | ||
7333ed17 | 732 | if (offset != cwd->len && !is_absolute_path(gitdir)) |
2d4dcf21 | 733 | gitdir = to_free = real_pathdup(gitdir, 1); |
7333ed17 | 734 | if (chdir(cwd->buf)) |
4868b2ea | 735 | die_errno("Could not come back to cwd"); |
2d4dcf21 JS |
736 | ret = setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
737 | free(to_free); | |
738 | return ret; | |
4868b2ea JN |
739 | } |
740 | ||
9951d3b3 NTND |
741 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
742 | if (is_bare_repository_cfg > 0) { | |
7333ed17 RS |
743 | set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir)); |
744 | if (chdir(cwd->buf)) | |
9951d3b3 | 745 | die_errno("Could not come back to cwd"); |
98937bef | 746 | return NULL; |
9951d3b3 | 747 | } |
98937bef | 748 | |
9951d3b3 NTND |
749 | /* #0, #1, #5, #8, #9, #12, #13 */ |
750 | set_git_work_tree("."); | |
751 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
752 | set_git_dir(gitdir); | |
98937bef | 753 | inside_git_dir = 0; |
9951d3b3 | 754 | inside_work_tree = 1; |
7333ed17 | 755 | if (offset == cwd->len) |
98937bef NTND |
756 | return NULL; |
757 | ||
df380d58 JS |
758 | /* Make "offset" point past the '/' (already the case for root dirs) */ |
759 | if (offset != offset_1st_component(cwd->buf)) | |
760 | offset++; | |
761 | /* Add a '/' at the end */ | |
7333ed17 RS |
762 | strbuf_addch(cwd, '/'); |
763 | return cwd->buf + offset; | |
98937bef NTND |
764 | } |
765 | ||
1cd8031b | 766 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
7333ed17 RS |
767 | static const char *setup_bare_git_dir(struct strbuf *cwd, int offset, |
768 | int *nongit_ok) | |
68698da5 JN |
769 | { |
770 | int root_len; | |
771 | ||
1cd8031b NTND |
772 | if (check_repository_format_gently(".", nongit_ok)) |
773 | return NULL; | |
774 | ||
2cd83d10 JK |
775 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
776 | ||
4868b2ea JN |
777 | /* --work-tree is set without --git-dir; use discovered one */ |
778 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
da6f8475 | 779 | static const char *gitdir; |
4868b2ea | 780 | |
7333ed17 RS |
781 | gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset); |
782 | if (chdir(cwd->buf)) | |
4868b2ea | 783 | die_errno("Could not come back to cwd"); |
7333ed17 | 784 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
4868b2ea JN |
785 | } |
786 | ||
68698da5 | 787 | inside_git_dir = 1; |
1cd8031b | 788 | inside_work_tree = 0; |
7333ed17 RS |
789 | if (offset != cwd->len) { |
790 | if (chdir(cwd->buf)) | |
8fc0ae80 | 791 | die_errno("Cannot come back to cwd"); |
7333ed17 RS |
792 | root_len = offset_1st_component(cwd->buf); |
793 | strbuf_setlen(cwd, offset > root_len ? offset : root_len); | |
794 | set_git_dir(cwd->buf); | |
337e51ce | 795 | } |
1cd8031b | 796 | else |
68698da5 | 797 | set_git_dir("."); |
68698da5 JN |
798 | return NULL; |
799 | } | |
800 | ||
f161edeb JN |
801 | static const char *setup_nongit(const char *cwd, int *nongit_ok) |
802 | { | |
803 | if (!nongit_ok) | |
2ff30e67 | 804 | die(_("Not a git repository (or any of the parent directories): %s"), DEFAULT_GIT_DIR_ENVIRONMENT); |
f161edeb | 805 | if (chdir(cwd)) |
2ff30e67 | 806 | die_errno(_("Cannot come back to cwd")); |
f161edeb JN |
807 | *nongit_ok = 1; |
808 | return NULL; | |
809 | } | |
810 | ||
2565b43b | 811 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
60c98d1e JN |
812 | { |
813 | struct stat buf; | |
2565b43b CB |
814 | if (stat(path, &buf)) { |
815 | die_errno("failed to stat '%*s%s%s'", | |
816 | prefix_len, | |
60c98d1e JN |
817 | prefix ? prefix : "", |
818 | prefix ? "/" : "", path); | |
2565b43b | 819 | } |
60c98d1e JN |
820 | return buf.st_dev; |
821 | } | |
822 | ||
9e2326c7 | 823 | /* |
1b77d83c MH |
824 | * A "string_list_each_func_t" function that canonicalizes an entry |
825 | * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or | |
7ec30aaa MH |
826 | * discards it if unusable. The presence of an empty entry in |
827 | * GIT_CEILING_DIRECTORIES turns off canonicalization for all | |
828 | * subsequent entries. | |
9e2326c7 | 829 | */ |
1b77d83c | 830 | static int canonicalize_ceiling_entry(struct string_list_item *item, |
7ec30aaa | 831 | void *cb_data) |
9e2326c7 | 832 | { |
7ec30aaa | 833 | int *empty_entry_found = cb_data; |
1b77d83c | 834 | char *ceil = item->string; |
9e2326c7 | 835 | |
7ec30aaa MH |
836 | if (!*ceil) { |
837 | *empty_entry_found = 1; | |
9e2326c7 | 838 | return 0; |
7ec30aaa | 839 | } else if (!is_absolute_path(ceil)) { |
9e2326c7 | 840 | return 0; |
7ec30aaa MH |
841 | } else if (*empty_entry_found) { |
842 | /* Keep entry but do not canonicalize it */ | |
843 | return 1; | |
844 | } else { | |
ce83eadd | 845 | char *real_path = real_pathdup(ceil, 0); |
4ac9006f | 846 | if (!real_path) { |
7ec30aaa | 847 | return 0; |
4ac9006f | 848 | } |
7ec30aaa | 849 | free(item->string); |
4ac9006f | 850 | item->string = real_path; |
7ec30aaa MH |
851 | return 1; |
852 | } | |
9e2326c7 MH |
853 | } |
854 | ||
ce9b8aab JS |
855 | enum discovery_result { |
856 | GIT_DIR_NONE = 0, | |
857 | GIT_DIR_EXPLICIT, | |
858 | GIT_DIR_DISCOVERED, | |
859 | GIT_DIR_BARE, | |
860 | /* these are errors */ | |
861 | GIT_DIR_HIT_CEILING = -1, | |
01017dce JS |
862 | GIT_DIR_HIT_MOUNT_POINT = -2, |
863 | GIT_DIR_INVALID_GITFILE = -3 | |
ce9b8aab JS |
864 | }; |
865 | ||
e90fdc39 JS |
866 | /* |
867 | * We cannot decide in this function whether we are in the work tree or | |
868 | * not, since the config can only be read _after_ this function was called. | |
ce9b8aab JS |
869 | * |
870 | * Also, we avoid changing any global state (such as the current working | |
871 | * directory) to allow early callers. | |
872 | * | |
873 | * The directory where the search should start needs to be passed in via the | |
874 | * `dir` parameter; upon return, the `dir` buffer will contain the path of | |
875 | * the directory where the search ended, and `gitdir` will contain the path of | |
876 | * the discovered .git/ directory, if any. If `gitdir` is not absolute, it | |
877 | * is relative to `dir` (i.e. *not* necessarily the cwd). | |
e90fdc39 | 878 | */ |
ce9b8aab | 879 | static enum discovery_result setup_git_directory_gently_1(struct strbuf *dir, |
01017dce JS |
880 | struct strbuf *gitdir, |
881 | int die_on_error) | |
d288a700 | 882 | { |
0454dd93 | 883 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
31171d9e | 884 | struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; |
ce9b8aab JS |
885 | const char *gitdirenv; |
886 | int ceil_offset = -1, min_offset = has_dos_drive_prefix(dir->buf) ? 3 : 1; | |
c7d1d1b1 RH |
887 | dev_t current_device = 0; |
888 | int one_filesystem = 1; | |
d288a700 | 889 | |
e90fdc39 JS |
890 | /* |
891 | * If GIT_DIR is set explicitly, we're not going | |
892 | * to do any discovery, but we still do repository | |
893 | * validation. | |
894 | */ | |
ad1a382f | 895 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
ce9b8aab JS |
896 | if (gitdirenv) { |
897 | strbuf_addstr(gitdir, gitdirenv); | |
898 | return GIT_DIR_EXPLICIT; | |
899 | } | |
d288a700 | 900 | |
31171d9e | 901 | if (env_ceiling_dirs) { |
7ec30aaa MH |
902 | int empty_entry_found = 0; |
903 | ||
31171d9e | 904 | string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); |
1b77d83c | 905 | filter_string_list(&ceiling_dirs, 0, |
7ec30aaa | 906 | canonicalize_ceiling_entry, &empty_entry_found); |
ce9b8aab | 907 | ceil_offset = longest_ancestor_length(dir->buf, &ceiling_dirs); |
31171d9e MH |
908 | string_list_clear(&ceiling_dirs, 0); |
909 | } | |
910 | ||
ce9b8aab JS |
911 | if (ceil_offset < 0) |
912 | ceil_offset = min_offset - 2; | |
d288a700 | 913 | |
892c41b9 | 914 | /* |
ce9b8aab | 915 | * Test in the following order (relative to the dir): |
b44ebb19 | 916 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
917 | * - .git/ |
918 | * - ./ (bare) | |
b44ebb19 | 919 | * - ../.git |
e90fdc39 JS |
920 | * - ../.git/ |
921 | * - ../ (bare) | |
922 | * - ../../.git/ | |
923 | * etc. | |
892c41b9 | 924 | */ |
cf87463e | 925 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e | 926 | if (one_filesystem) |
ce9b8aab | 927 | current_device = get_device_or_die(dir->buf, NULL, 0); |
e90fdc39 | 928 | for (;;) { |
01017dce | 929 | int offset = dir->len, error_code = 0; |
ce9b8aab JS |
930 | |
931 | if (offset > min_offset) | |
932 | strbuf_addch(dir, '/'); | |
933 | strbuf_addstr(dir, DEFAULT_GIT_DIR_ENVIRONMENT); | |
01017dce JS |
934 | gitdirenv = read_gitfile_gently(dir->buf, die_on_error ? |
935 | NULL : &error_code); | |
936 | if (!gitdirenv) { | |
937 | if (die_on_error || | |
938 | error_code == READ_GITFILE_ERR_NOT_A_FILE) { | |
5c4003ca | 939 | /* NEEDSWORK: fail if .git is not file nor dir */ |
01017dce JS |
940 | if (is_git_directory(dir->buf)) |
941 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
942 | } else if (error_code != READ_GITFILE_ERR_STAT_FAILED) | |
943 | return GIT_DIR_INVALID_GITFILE; | |
9951d3b3 | 944 | } |
ce9b8aab | 945 | strbuf_setlen(dir, offset); |
9951d3b3 | 946 | if (gitdirenv) { |
ce9b8aab JS |
947 | strbuf_addstr(gitdir, gitdirenv); |
948 | return GIT_DIR_DISCOVERED; | |
9951d3b3 | 949 | } |
9951d3b3 | 950 | |
ce9b8aab JS |
951 | if (is_git_directory(dir->buf)) { |
952 | strbuf_addstr(gitdir, "."); | |
953 | return GIT_DIR_BARE; | |
502ffe34 | 954 | } |
9951d3b3 | 955 | |
ce9b8aab JS |
956 | if (offset <= min_offset) |
957 | return GIT_DIR_HIT_CEILING; | |
1cd8031b | 958 | |
ce9b8aab | 959 | while (--offset > ceil_offset && !is_dir_sep(dir->buf[offset])) |
6c1e6544 | 960 | ; /* continue */ |
ce9b8aab JS |
961 | if (offset <= ceil_offset) |
962 | return GIT_DIR_HIT_CEILING; | |
963 | ||
964 | strbuf_setlen(dir, offset > min_offset ? offset : min_offset); | |
965 | if (one_filesystem && | |
966 | current_device != get_device_or_die(dir->buf, NULL, offset)) | |
967 | return GIT_DIR_HIT_MOUNT_POINT; | |
892c41b9 | 968 | } |
d288a700 | 969 | } |
5e7bfe25 | 970 | |
d3fb71b3 BW |
971 | int discover_git_directory(struct strbuf *commondir, |
972 | struct strbuf *gitdir) | |
16ac8b8d JS |
973 | { |
974 | struct strbuf dir = STRBUF_INIT, err = STRBUF_INIT; | |
975 | size_t gitdir_offset = gitdir->len, cwd_len; | |
d3fb71b3 | 976 | size_t commondir_offset = commondir->len; |
16ac8b8d JS |
977 | struct repository_format candidate; |
978 | ||
979 | if (strbuf_getcwd(&dir)) | |
d3fb71b3 | 980 | return -1; |
16ac8b8d JS |
981 | |
982 | cwd_len = dir.len; | |
01017dce | 983 | if (setup_git_directory_gently_1(&dir, gitdir, 0) <= 0) { |
16ac8b8d | 984 | strbuf_release(&dir); |
d3fb71b3 | 985 | return -1; |
16ac8b8d JS |
986 | } |
987 | ||
988 | /* | |
989 | * The returned gitdir is relative to dir, and if dir does not reflect | |
990 | * the current working directory, we simply make the gitdir absolute. | |
991 | */ | |
992 | if (dir.len < cwd_len && !is_absolute_path(gitdir->buf + gitdir_offset)) { | |
993 | /* Avoid a trailing "/." */ | |
994 | if (!strcmp(".", gitdir->buf + gitdir_offset)) | |
995 | strbuf_setlen(gitdir, gitdir_offset); | |
996 | else | |
997 | strbuf_addch(&dir, '/'); | |
998 | strbuf_insert(gitdir, gitdir_offset, dir.buf, dir.len); | |
999 | } | |
1000 | ||
d3fb71b3 BW |
1001 | get_common_dir(commondir, gitdir->buf + gitdir_offset); |
1002 | ||
16ac8b8d | 1003 | strbuf_reset(&dir); |
d3fb71b3 | 1004 | strbuf_addf(&dir, "%s/config", commondir->buf + commondir_offset); |
16ac8b8d JS |
1005 | read_repository_format(&candidate, dir.buf); |
1006 | strbuf_release(&dir); | |
1007 | ||
1008 | if (verify_repository_format(&candidate, &err) < 0) { | |
1009 | warning("ignoring git dir '%s': %s", | |
1010 | gitdir->buf + gitdir_offset, err.buf); | |
1011 | strbuf_release(&err); | |
d3fb71b3 | 1012 | strbuf_setlen(commondir, commondir_offset); |
69743f9b | 1013 | strbuf_setlen(gitdir, gitdir_offset); |
d3fb71b3 | 1014 | return -1; |
16ac8b8d JS |
1015 | } |
1016 | ||
d3fb71b3 | 1017 | return 0; |
16ac8b8d JS |
1018 | } |
1019 | ||
a60645f9 NTND |
1020 | const char *setup_git_directory_gently(int *nongit_ok) |
1021 | { | |
ce9b8aab JS |
1022 | static struct strbuf cwd = STRBUF_INIT; |
1023 | struct strbuf dir = STRBUF_INIT, gitdir = STRBUF_INIT; | |
b58a68c1 | 1024 | const char *prefix, *env_prefix; |
a60645f9 | 1025 | |
ce9b8aab JS |
1026 | /* |
1027 | * We may have read an incomplete configuration before | |
1028 | * setting-up the git directory. If so, clear the cache so | |
1029 | * that the next queries to the configuration reload complete | |
1030 | * configuration (including the per-repo config file that we | |
1031 | * ignored previously). | |
1032 | */ | |
1033 | git_config_clear(); | |
1034 | ||
1035 | /* | |
1036 | * Let's assume that we are in a git repository. | |
1037 | * If it turns out later that we are somewhere else, the value will be | |
1038 | * updated accordingly. | |
1039 | */ | |
1040 | if (nongit_ok) | |
1041 | *nongit_ok = 0; | |
1042 | ||
1043 | if (strbuf_getcwd(&cwd)) | |
1044 | die_errno(_("Unable to read current working directory")); | |
1045 | strbuf_addbuf(&dir, &cwd); | |
1046 | ||
01017dce | 1047 | switch (setup_git_directory_gently_1(&dir, &gitdir, 1)) { |
ce9b8aab JS |
1048 | case GIT_DIR_NONE: |
1049 | prefix = NULL; | |
1050 | break; | |
1051 | case GIT_DIR_EXPLICIT: | |
1052 | prefix = setup_explicit_git_dir(gitdir.buf, &cwd, nongit_ok); | |
1053 | break; | |
1054 | case GIT_DIR_DISCOVERED: | |
1055 | if (dir.len < cwd.len && chdir(dir.buf)) | |
1056 | die(_("Cannot change to '%s'"), dir.buf); | |
1057 | prefix = setup_discovered_git_dir(gitdir.buf, &cwd, dir.len, | |
1058 | nongit_ok); | |
1059 | break; | |
1060 | case GIT_DIR_BARE: | |
1061 | if (dir.len < cwd.len && chdir(dir.buf)) | |
1062 | die(_("Cannot change to '%s'"), dir.buf); | |
1063 | prefix = setup_bare_git_dir(&cwd, dir.len, nongit_ok); | |
1064 | break; | |
1065 | case GIT_DIR_HIT_CEILING: | |
1066 | prefix = setup_nongit(cwd.buf, nongit_ok); | |
1067 | break; | |
1068 | case GIT_DIR_HIT_MOUNT_POINT: | |
1069 | if (nongit_ok) { | |
1070 | *nongit_ok = 1; | |
1071 | strbuf_release(&cwd); | |
1072 | strbuf_release(&dir); | |
1073 | return NULL; | |
1074 | } | |
1075 | die(_("Not a git repository (or any parent up to mount point %s)\n" | |
1076 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."), | |
1077 | dir.buf); | |
1078 | default: | |
1079 | die("BUG: unhandled setup_git_directory_1() result"); | |
1080 | } | |
1081 | ||
3736c925 | 1082 | env_prefix = getenv(GIT_TOPLEVEL_PREFIX_ENVIRONMENT); |
b58a68c1 BW |
1083 | if (env_prefix) |
1084 | prefix = env_prefix; | |
1085 | ||
1f5d271f | 1086 | if (prefix) |
a6f7f9a3 | 1087 | setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1); |
1f5d271f | 1088 | else |
a6f7f9a3 | 1089 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); |
1f5d271f | 1090 | |
46c3cd44 JK |
1091 | startup_info->have_repository = !nongit_ok || !*nongit_ok; |
1092 | startup_info->prefix = prefix; | |
1093 | ||
ce9b8aab JS |
1094 | strbuf_release(&dir); |
1095 | strbuf_release(&gitdir); | |
1096 | ||
a60645f9 NTND |
1097 | return prefix; |
1098 | } | |
1099 | ||
94df2506 JH |
1100 | int git_config_perm(const char *var, const char *value) |
1101 | { | |
06cbe855 HO |
1102 | int i; |
1103 | char *endptr; | |
1104 | ||
1105 | if (value == NULL) | |
1106 | return PERM_GROUP; | |
1107 | ||
1108 | if (!strcmp(value, "umask")) | |
1109 | return PERM_UMASK; | |
1110 | if (!strcmp(value, "group")) | |
1111 | return PERM_GROUP; | |
1112 | if (!strcmp(value, "all") || | |
1113 | !strcmp(value, "world") || | |
1114 | !strcmp(value, "everybody")) | |
1115 | return PERM_EVERYBODY; | |
1116 | ||
1117 | /* Parse octal numbers */ | |
1118 | i = strtol(value, &endptr, 8); | |
1119 | ||
1120 | /* If not an octal number, maybe true/false? */ | |
1121 | if (*endptr != 0) | |
1122 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
1123 | ||
1124 | /* | |
1125 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 1126 | * a chmod value to restrict to. |
06cbe855 HO |
1127 | */ |
1128 | switch (i) { | |
1129 | case PERM_UMASK: /* 0 */ | |
1130 | return PERM_UMASK; | |
1131 | case OLD_PERM_GROUP: /* 1 */ | |
1132 | return PERM_GROUP; | |
1133 | case OLD_PERM_EVERYBODY: /* 2 */ | |
1134 | return PERM_EVERYBODY; | |
94df2506 | 1135 | } |
06cbe855 HO |
1136 | |
1137 | /* A filemode value was given: 0xxx */ | |
1138 | ||
1139 | if ((i & 0600) != 0600) | |
2ff30e67 | 1140 | die(_("Problem with core.sharedRepository filemode value " |
06cbe855 | 1141 | "(0%.3o).\nThe owner of files must always have " |
2ff30e67 | 1142 | "read and write permissions."), i); |
06cbe855 HO |
1143 | |
1144 | /* | |
1145 | * Mask filemode value. Others can not get write permission. | |
1146 | * x flags for directories are handled separately. | |
1147 | */ | |
5a688fe4 | 1148 | return -(i & 0666); |
94df2506 JH |
1149 | } |
1150 | ||
4b0d1eeb | 1151 | void check_repository_format(void) |
ab9cb76f | 1152 | { |
f1c126bd JK |
1153 | check_repository_format_gently(get_git_dir(), NULL); |
1154 | startup_info->have_repository = 1; | |
ab9cb76f JH |
1155 | } |
1156 | ||
e1e5ec86 CB |
1157 | /* |
1158 | * Returns the "prefix", a path to the current working directory | |
1159 | * relative to the work tree root, or NULL, if the current working | |
1160 | * directory is not a strict subdirectory of the work tree root. The | |
1161 | * prefix always ends with a '/' character. | |
1162 | */ | |
5e7bfe25 JH |
1163 | const char *setup_git_directory(void) |
1164 | { | |
b3f66fd3 | 1165 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 1166 | } |
abc06822 | 1167 | |
40d96325 | 1168 | const char *resolve_gitdir_gently(const char *suspect, int *return_error_code) |
abc06822 FG |
1169 | { |
1170 | if (is_git_directory(suspect)) | |
1171 | return suspect; | |
40d96325 | 1172 | return read_gitfile_gently(suspect, return_error_code); |
abc06822 | 1173 | } |
1d999ddd TR |
1174 | |
1175 | /* if any standard file descriptor is missing open it to /dev/null */ | |
1176 | void sanitize_stdfds(void) | |
1177 | { | |
1178 | int fd = open("/dev/null", O_RDWR, 0); | |
1179 | while (fd != -1 && fd < 2) | |
1180 | fd = dup(fd); | |
1181 | if (fd == -1) | |
1182 | die_errno("open /dev/null or dup failed"); | |
1183 | if (fd > 2) | |
1184 | close(fd); | |
1185 | } | |
de0957ce NTND |
1186 | |
1187 | int daemonize(void) | |
1188 | { | |
1189 | #ifdef NO_POSIX_GOODIES | |
1190 | errno = ENOSYS; | |
1191 | return -1; | |
1192 | #else | |
1193 | switch (fork()) { | |
1194 | case 0: | |
1195 | break; | |
1196 | case -1: | |
1197 | die_errno("fork failed"); | |
1198 | default: | |
1199 | exit(0); | |
1200 | } | |
1201 | if (setsid() == -1) | |
1202 | die_errno("setsid failed"); | |
1203 | close(0); | |
1204 | close(1); | |
1205 | close(2); | |
1206 | sanitize_stdfds(); | |
1207 | return 0; | |
1208 | #endif | |
1209 | } |