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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" |
e90fdc39 JS |
6 | |
7 | static int inside_git_dir = -1; | |
8 | static int inside_work_tree = -1; | |
fada7674 | 9 | static int work_tree_config_is_bogus; |
d288a700 | 10 | |
46c3cd44 JK |
11 | static struct startup_info the_startup_info; |
12 | struct startup_info *startup_info = &the_startup_info; | |
13 | ||
ddc2a628 MEW |
14 | /* |
15 | * The input parameter must contain an absolute path, and it must already be | |
16 | * normalized. | |
17 | * | |
18 | * Find the part of an absolute path that lies inside the work tree by | |
19 | * dereferencing symlinks outside the work tree, for example: | |
20 | * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file | |
21 | * /dir/file (work tree is /) -> dir/file | |
22 | * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2 | |
23 | * /dir/repolink/file (repolink points to /dir/repo) -> file | |
24 | * /dir/repo (exactly equal to work tree) -> (empty string) | |
25 | */ | |
26 | static int abspath_part_inside_repo(char *path) | |
27 | { | |
28 | size_t len; | |
29 | size_t wtlen; | |
30 | char *path0; | |
31 | int off; | |
32 | const char *work_tree = get_git_work_tree(); | |
33 | ||
34 | if (!work_tree) | |
35 | return -1; | |
36 | wtlen = strlen(work_tree); | |
37 | len = strlen(path); | |
6127ff63 | 38 | off = offset_1st_component(path); |
ddc2a628 MEW |
39 | |
40 | /* check if work tree is already the prefix */ | |
41 | if (wtlen <= len && !strncmp(path, work_tree, wtlen)) { | |
42 | if (path[wtlen] == '/') { | |
43 | memmove(path, path + wtlen + 1, len - wtlen); | |
44 | return 0; | |
45 | } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') { | |
46 | /* work tree is the root, or the whole path */ | |
47 | memmove(path, path + wtlen, len - wtlen + 1); | |
48 | return 0; | |
49 | } | |
50 | /* work tree might match beginning of a symlink to work tree */ | |
51 | off = wtlen; | |
52 | } | |
53 | path0 = path; | |
6127ff63 | 54 | path += off; |
ddc2a628 MEW |
55 | |
56 | /* check each '/'-terminated level */ | |
57 | while (*path) { | |
58 | path++; | |
59 | if (*path == '/') { | |
60 | *path = '\0'; | |
61 | if (strcmp(real_path(path0), work_tree) == 0) { | |
62 | memmove(path0, path + 1, len - (path - path0)); | |
63 | return 0; | |
64 | } | |
65 | *path = '/'; | |
66 | } | |
67 | } | |
68 | ||
69 | /* check whole path */ | |
70 | if (strcmp(real_path(path0), work_tree) == 0) { | |
71 | *path0 = '\0'; | |
72 | return 0; | |
73 | } | |
74 | ||
75 | return -1; | |
76 | } | |
77 | ||
645a29c4 NTND |
78 | /* |
79 | * Normalize "path", prepending the "prefix" for relative paths. If | |
80 | * remaining_prefix is not NULL, return the actual prefix still | |
81 | * remains in the path. For example, prefix = sub1/sub2/ and path is | |
82 | * | |
83 | * foo -> sub1/sub2/foo (full prefix) | |
84 | * ../foo -> sub1/foo (remaining prefix is sub1/) | |
85 | * ../../bar -> bar (no remaining prefix) | |
86 | * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix) | |
87 | * `pwd`/../bar -> sub1/bar (no remaining prefix) | |
88 | */ | |
89 | char *prefix_path_gently(const char *prefix, int len, | |
90 | int *remaining_prefix, const char *path) | |
d089ebaa JH |
91 | { |
92 | const char *orig = path; | |
18e051a3 CMAB |
93 | char *sanitized; |
94 | if (is_absolute_path(orig)) { | |
3733e694 | 95 | sanitized = xmallocz(strlen(path)); |
645a29c4 NTND |
96 | if (remaining_prefix) |
97 | *remaining_prefix = 0; | |
655ee9ea MEW |
98 | if (normalize_path_copy_len(sanitized, path, remaining_prefix)) { |
99 | free(sanitized); | |
100 | return NULL; | |
101 | } | |
102 | if (abspath_part_inside_repo(sanitized)) { | |
103 | free(sanitized); | |
104 | return NULL; | |
105 | } | |
18e051a3 | 106 | } else { |
24041d6b | 107 | sanitized = xstrfmt("%.*s%s", len, len ? prefix : "", path); |
645a29c4 NTND |
108 | if (remaining_prefix) |
109 | *remaining_prefix = len; | |
655ee9ea | 110 | if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) { |
546e0fd9 JK |
111 | free(sanitized); |
112 | return NULL; | |
d089ebaa | 113 | } |
d089ebaa JH |
114 | } |
115 | return sanitized; | |
f332726e LT |
116 | } |
117 | ||
546e0fd9 JK |
118 | char *prefix_path(const char *prefix, int len, const char *path) |
119 | { | |
645a29c4 | 120 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
121 | if (!r) |
122 | die("'%s' is outside repository", path); | |
123 | return r; | |
124 | } | |
125 | ||
126 | int path_inside_repo(const char *prefix, const char *path) | |
127 | { | |
128 | int len = prefix ? strlen(prefix) : 0; | |
645a29c4 | 129 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
130 | if (r) { |
131 | free(r); | |
132 | return 1; | |
133 | } | |
134 | return 0; | |
135 | } | |
136 | ||
c6e8c800 JH |
137 | int check_filename(const char *prefix, const char *arg) |
138 | { | |
e4da43b1 | 139 | char *to_free = NULL; |
c6e8c800 JH |
140 | struct stat st; |
141 | ||
d51c6ee0 JK |
142 | if (skip_prefix(arg, ":/", &arg)) { |
143 | if (!*arg) /* ":/" is root dir, always exists */ | |
4db86e8b | 144 | return 1; |
a08cbcda | 145 | prefix = NULL; |
42471bce JK |
146 | } else if (skip_prefix(arg, ":!", &arg) || |
147 | skip_prefix(arg, ":^", &arg)) { | |
148 | if (!*arg) /* excluding everything is silly, but allowed */ | |
149 | return 1; | |
a08cbcda JK |
150 | } |
151 | ||
152 | if (prefix) | |
153 | arg = to_free = prefix_filename(prefix, arg); | |
154 | ||
155 | if (!lstat(arg, &st)) { | |
e4da43b1 | 156 | free(to_free); |
c6e8c800 | 157 | return 1; /* file exists */ |
e4da43b1 | 158 | } |
93dd544f | 159 | if (is_missing_file_error(errno)) { |
e4da43b1 | 160 | free(to_free); |
c6e8c800 | 161 | return 0; /* file does not exist */ |
e4da43b1 | 162 | } |
c6e8c800 JH |
163 | die_errno("failed to stat '%s'", arg); |
164 | } | |
165 | ||
023e37c3 MM |
166 | static void NORETURN die_verify_filename(const char *prefix, |
167 | const char *arg, | |
168 | int diagnose_misspelt_rev) | |
009fee47 | 169 | { |
023e37c3 | 170 | if (!diagnose_misspelt_rev) |
ab33a76e VA |
171 | die(_("%s: no such path in the working tree.\n" |
172 | "Use 'git <command> -- <path>...' to specify paths that do not exist locally."), | |
023e37c3 | 173 | arg); |
0e539dca JH |
174 | /* |
175 | * Saying "'(icase)foo' does not exist in the index" when the | |
176 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
177 | * begins with a colon and is followed by a non-alnum; do not | |
8c135ea2 | 178 | * let maybe_die_on_misspelt_object_name() even trigger. |
0e539dca JH |
179 | */ |
180 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
8c135ea2 | 181 | maybe_die_on_misspelt_object_name(arg, prefix); |
0e539dca | 182 | |
009fee47 | 183 | /* ... or fall back the most general message. */ |
ab33a76e VA |
184 | die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n" |
185 | "Use '--' to separate paths from revisions, like this:\n" | |
186 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
009fee47 MM |
187 | |
188 | } | |
189 | ||
c99eddd8 JK |
190 | /* |
191 | * Check for arguments that don't resolve as actual files, | |
192 | * but which look sufficiently like pathspecs that we'll consider | |
193 | * them such for the purposes of rev/pathspec DWIM parsing. | |
194 | */ | |
195 | static int looks_like_pathspec(const char *arg) | |
196 | { | |
197 | /* anything with a wildcard character */ | |
198 | if (!no_wildcard(arg)) | |
199 | return 1; | |
200 | ||
201 | /* long-form pathspec magic */ | |
202 | if (starts_with(arg, ":(")) | |
203 | return 1; | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
e23d0b4a LT |
208 | /* |
209 | * Verify a filename that we got as an argument for a pathspec | |
210 | * entry. Note that a filename that begins with "-" never verifies | |
211 | * as true, because even if such a filename were to exist, we want | |
212 | * it to be preceded by the "--" marker (or we want the user to | |
213 | * use a format like "./-filename") | |
023e37c3 MM |
214 | * |
215 | * The "diagnose_misspelt_rev" is used to provide a user-friendly | |
216 | * diagnosis when dying upon finding that "name" is not a pathname. | |
217 | * If set to 1, the diagnosis will try to diagnose "name" as an | |
218 | * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis | |
219 | * will only complain about an inexisting file. | |
220 | * | |
221 | * This function is typically called to check that a "file or rev" | |
222 | * argument is unambiguous. In this case, the caller will want | |
223 | * diagnose_misspelt_rev == 1 when verifying the first non-rev | |
224 | * argument (which could have been a revision), and | |
225 | * diagnose_misspelt_rev == 0 for the next ones (because we already | |
226 | * saw a filename, there's not ambiguity anymore). | |
e23d0b4a | 227 | */ |
023e37c3 MM |
228 | void verify_filename(const char *prefix, |
229 | const char *arg, | |
230 | int diagnose_misspelt_rev) | |
e23d0b4a | 231 | { |
e23d0b4a | 232 | if (*arg == '-') |
33f3c683 | 233 | die("option '%s' must come before non-option arguments", arg); |
2cb47ab6 | 234 | if (looks_like_pathspec(arg) || check_filename(prefix, arg)) |
e23d0b4a | 235 | return; |
023e37c3 | 236 | die_verify_filename(prefix, arg, diagnose_misspelt_rev); |
e23d0b4a LT |
237 | } |
238 | ||
ea92f41f JH |
239 | /* |
240 | * Opposite of the above: the command line did not have -- marker | |
241 | * and we parsed the arg as a refname. It should not be interpretable | |
242 | * as a filename. | |
243 | */ | |
244 | void verify_non_filename(const char *prefix, const char *arg) | |
245 | { | |
7ae3df8c | 246 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 247 | return; |
ea92f41f JH |
248 | if (*arg == '-') |
249 | return; /* flag */ | |
c6e8c800 JH |
250 | if (!check_filename(prefix, arg)) |
251 | return; | |
ab33a76e VA |
252 | die(_("ambiguous argument '%s': both revision and filename\n" |
253 | "Use '--' to separate paths from revisions, like this:\n" | |
254 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
ea92f41f JH |
255 | } |
256 | ||
31e26ebc | 257 | int get_common_dir(struct strbuf *sb, const char *gitdir) |
11f9dd71 MK |
258 | { |
259 | const char *git_env_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT); | |
260 | if (git_env_common_dir) { | |
261 | strbuf_addstr(sb, git_env_common_dir); | |
262 | return 1; | |
263 | } else { | |
264 | return get_common_dir_noenv(sb, gitdir); | |
265 | } | |
266 | } | |
267 | ||
268 | int get_common_dir_noenv(struct strbuf *sb, const char *gitdir) | |
4dc4e145 NTND |
269 | { |
270 | struct strbuf data = STRBUF_INIT; | |
271 | struct strbuf path = STRBUF_INIT; | |
31e26ebc | 272 | int ret = 0; |
11f9dd71 | 273 | |
4dc4e145 NTND |
274 | strbuf_addf(&path, "%s/commondir", gitdir); |
275 | if (file_exists(path.buf)) { | |
276 | if (strbuf_read_file(&data, path.buf, 0) <= 0) | |
277 | die_errno(_("failed to read %s"), path.buf); | |
278 | while (data.len && (data.buf[data.len - 1] == '\n' || | |
279 | data.buf[data.len - 1] == '\r')) | |
280 | data.len--; | |
281 | data.buf[data.len] = '\0'; | |
282 | strbuf_reset(&path); | |
283 | if (!is_absolute_path(data.buf)) | |
284 | strbuf_addf(&path, "%s/", gitdir); | |
285 | strbuf_addbuf(&path, &data); | |
33ad9ddd | 286 | strbuf_add_real_path(sb, path.buf); |
31e26ebc | 287 | ret = 1; |
4ac9006f | 288 | } else { |
4dc4e145 | 289 | strbuf_addstr(sb, gitdir); |
4ac9006f BW |
290 | } |
291 | ||
4dc4e145 NTND |
292 | strbuf_release(&data); |
293 | strbuf_release(&path); | |
31e26ebc | 294 | return ret; |
4dc4e145 | 295 | } |
d288a700 | 296 | |
5f5608bc | 297 | /* |
ad1a382f | 298 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 299 | * We want to see: |
5f5608bc | 300 | * |
790296fd | 301 | * - either an objects/ directory _or_ the proper |
5f5608bc | 302 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 303 | * - a refs/ directory |
8098a178 | 304 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
305 | * a proper "ref:", or a regular file HEAD that has a properly |
306 | * formatted sha1 object name. | |
5f5608bc | 307 | */ |
b3256eb8 | 308 | int is_git_directory(const char *suspect) |
5f5608bc | 309 | { |
1d186b6f NTND |
310 | struct strbuf path = STRBUF_INIT; |
311 | int ret = 0; | |
312 | size_t len; | |
ad1a382f | 313 | |
4dc4e145 | 314 | /* Check worktree-related signatures */ |
fa4d8c78 JK |
315 | strbuf_addstr(&path, suspect); |
316 | strbuf_complete(&path, '/'); | |
317 | strbuf_addstr(&path, "HEAD"); | |
4dc4e145 NTND |
318 | if (validate_headref(path.buf)) |
319 | goto done; | |
320 | ||
321 | strbuf_reset(&path); | |
322 | get_common_dir(&path, suspect); | |
1d186b6f | 323 | len = path.len; |
4dc4e145 NTND |
324 | |
325 | /* Check non-worktree-related signatures */ | |
ad1a382f SP |
326 | if (getenv(DB_ENVIRONMENT)) { |
327 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
1d186b6f | 328 | goto done; |
ad1a382f SP |
329 | } |
330 | else { | |
4dc4e145 | 331 | strbuf_setlen(&path, len); |
1d186b6f NTND |
332 | strbuf_addstr(&path, "/objects"); |
333 | if (access(path.buf, X_OK)) | |
334 | goto done; | |
ad1a382f SP |
335 | } |
336 | ||
1d186b6f NTND |
337 | strbuf_setlen(&path, len); |
338 | strbuf_addstr(&path, "/refs"); | |
339 | if (access(path.buf, X_OK)) | |
340 | goto done; | |
ad1a382f | 341 | |
1d186b6f NTND |
342 | ret = 1; |
343 | done: | |
344 | strbuf_release(&path); | |
345 | return ret; | |
5f5608bc LT |
346 | } |
347 | ||
ffd036b1 JK |
348 | int is_nonbare_repository_dir(struct strbuf *path) |
349 | { | |
350 | int ret = 0; | |
351 | int gitfile_error; | |
352 | size_t orig_path_len = path->len; | |
353 | assert(orig_path_len != 0); | |
354 | strbuf_complete(path, '/'); | |
355 | strbuf_addstr(path, ".git"); | |
356 | if (read_gitfile_gently(path->buf, &gitfile_error) || is_git_directory(path->buf)) | |
357 | ret = 1; | |
358 | if (gitfile_error == READ_GITFILE_ERR_OPEN_FAILED || | |
359 | gitfile_error == READ_GITFILE_ERR_READ_FAILED) | |
360 | ret = 1; | |
361 | strbuf_setlen(path, orig_path_len); | |
362 | return ret; | |
363 | } | |
364 | ||
68025633 JS |
365 | int is_inside_git_dir(void) |
366 | { | |
e90fdc39 JS |
367 | if (inside_git_dir < 0) |
368 | inside_git_dir = is_inside_dir(get_git_dir()); | |
369 | return inside_git_dir; | |
892c41b9 ML |
370 | } |
371 | ||
892c41b9 ML |
372 | int is_inside_work_tree(void) |
373 | { | |
e90fdc39 JS |
374 | if (inside_work_tree < 0) |
375 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
376 | return inside_work_tree; | |
892c41b9 ML |
377 | } |
378 | ||
f3fa1838 JH |
379 | void setup_work_tree(void) |
380 | { | |
354e6534 JS |
381 | const char *work_tree, *git_dir; |
382 | static int initialized = 0; | |
383 | ||
384 | if (initialized) | |
385 | return; | |
fada7674 JK |
386 | |
387 | if (work_tree_config_is_bogus) | |
388 | die("unable to set up work tree using invalid config"); | |
389 | ||
354e6534 JS |
390 | work_tree = get_git_work_tree(); |
391 | git_dir = get_git_dir(); | |
59f0f2f3 | 392 | if (!is_absolute_path(git_dir)) |
e2a57aac | 393 | git_dir = real_path(get_git_dir()); |
59f0f2f3 MH |
394 | if (!work_tree || chdir(work_tree)) |
395 | die("This operation must be run in a work tree"); | |
0ed74813 NTND |
396 | |
397 | /* | |
398 | * Make sure subsequent git processes find correct worktree | |
399 | * if $GIT_WORK_TREE is set relative | |
400 | */ | |
401 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
402 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
403 | ||
41894ae3 | 404 | set_git_dir(remove_leading_path(git_dir, work_tree)); |
354e6534 | 405 | initialized = 1; |
59f0f2f3 MH |
406 | } |
407 | ||
2cc7c2c7 | 408 | static int check_repo_format(const char *var, const char *value, void *vdata) |
31e26ebc | 409 | { |
2cc7c2c7 | 410 | struct repository_format *data = vdata; |
00a09d57 JK |
411 | const char *ext; |
412 | ||
31e26ebc | 413 | if (strcmp(var, "core.repositoryformatversion") == 0) |
2cc7c2c7 | 414 | data->version = git_config_int(var, value); |
00a09d57 JK |
415 | else if (skip_prefix(var, "extensions.", &ext)) { |
416 | /* | |
417 | * record any known extensions here; otherwise, | |
418 | * we fall through to recording it as unknown, and | |
419 | * check_repository_format will complain | |
420 | */ | |
421 | if (!strcmp(ext, "noop")) | |
422 | ; | |
067fbd41 | 423 | else if (!strcmp(ext, "preciousobjects")) |
2cc7c2c7 | 424 | data->precious_objects = git_config_bool(var, value); |
00a09d57 | 425 | else |
2cc7c2c7 | 426 | string_list_append(&data->unknown_extensions, ext); |
652f18ee JK |
427 | } else if (strcmp(var, "core.bare") == 0) { |
428 | data->is_bare = git_config_bool(var, value); | |
429 | } else if (strcmp(var, "core.worktree") == 0) { | |
430 | if (!value) | |
431 | return config_error_nonbool(var); | |
432 | data->work_tree = xstrdup(value); | |
00a09d57 | 433 | } |
31e26ebc NTND |
434 | return 0; |
435 | } | |
436 | ||
337e51ce | 437 | static int check_repository_format_gently(const char *gitdir, int *nongit_ok) |
9459aa77 | 438 | { |
7d0fb0da | 439 | struct strbuf sb = STRBUF_INIT; |
2cc7c2c7 JK |
440 | struct strbuf err = STRBUF_INIT; |
441 | struct repository_format candidate; | |
652f18ee | 442 | int has_common; |
00a09d57 | 443 | |
652f18ee | 444 | has_common = get_common_dir(&sb, gitdir); |
e61a509a | 445 | strbuf_addstr(&sb, "/config"); |
652f18ee | 446 | read_repository_format(&candidate, sb.buf); |
2cc7c2c7 | 447 | strbuf_release(&sb); |
e61a509a | 448 | |
337e51ce | 449 | /* |
2cc7c2c7 JK |
450 | * For historical use of check_repository_format() in git-init, |
451 | * we treat a missing config as a silent "ok", even when nongit_ok | |
452 | * is unset. | |
337e51ce | 453 | */ |
2cc7c2c7 JK |
454 | if (candidate.version < 0) |
455 | return 0; | |
456 | ||
457 | if (verify_repository_format(&candidate, &err) < 0) { | |
458 | if (nongit_ok) { | |
459 | warning("%s", err.buf); | |
460 | strbuf_release(&err); | |
461 | *nongit_ok = -1; | |
462 | return -1; | |
463 | } | |
464 | die("%s", err.buf); | |
465 | } | |
466 | ||
2cc7c2c7 JK |
467 | repository_format_precious_objects = candidate.precious_objects; |
468 | string_list_clear(&candidate.unknown_extensions, 0); | |
652f18ee JK |
469 | if (!has_common) { |
470 | if (candidate.is_bare != -1) { | |
471 | is_bare_repository_cfg = candidate.is_bare; | |
472 | if (is_bare_repository_cfg == 1) | |
473 | inside_work_tree = -1; | |
474 | } | |
475 | if (candidate.work_tree) { | |
476 | free(git_work_tree_cfg); | |
477 | git_work_tree_cfg = candidate.work_tree; | |
2cc7c2c7 | 478 | inside_work_tree = -1; |
652f18ee JK |
479 | } |
480 | } else { | |
481 | free(candidate.work_tree); | |
2cc7c2c7 JK |
482 | } |
483 | ||
484 | return 0; | |
485 | } | |
486 | ||
652f18ee | 487 | int read_repository_format(struct repository_format *format, const char *path) |
2cc7c2c7 JK |
488 | { |
489 | memset(format, 0, sizeof(*format)); | |
490 | format->version = -1; | |
491 | format->is_bare = -1; | |
492 | string_list_init(&format->unknown_extensions, 1); | |
652f18ee | 493 | git_config_from_file(check_repo_format, path, format); |
2cc7c2c7 JK |
494 | return format->version; |
495 | } | |
496 | ||
2cc7c2c7 JK |
497 | int verify_repository_format(const struct repository_format *format, |
498 | struct strbuf *err) | |
499 | { | |
500 | if (GIT_REPO_VERSION_READ < format->version) { | |
274db840 | 501 | strbuf_addf(err, _("Expected git repo version <= %d, found %d"), |
2cc7c2c7 JK |
502 | GIT_REPO_VERSION_READ, format->version); |
503 | return -1; | |
504 | } | |
505 | ||
506 | if (format->version >= 1 && format->unknown_extensions.nr) { | |
00a09d57 JK |
507 | int i; |
508 | ||
274db840 | 509 | strbuf_addstr(err, _("unknown repository extensions found:")); |
00a09d57 | 510 | |
2cc7c2c7 JK |
511 | for (i = 0; i < format->unknown_extensions.nr; i++) |
512 | strbuf_addf(err, "\n\t%s", | |
513 | format->unknown_extensions.items[i].string); | |
514 | return -1; | |
00a09d57 JK |
515 | } |
516 | ||
2cc7c2c7 | 517 | return 0; |
9459aa77 NTND |
518 | } |
519 | ||
5f29433f SB |
520 | void read_gitfile_error_die(int error_code, const char *path, const char *dir) |
521 | { | |
522 | switch (error_code) { | |
523 | case READ_GITFILE_ERR_STAT_FAILED: | |
524 | case READ_GITFILE_ERR_NOT_A_FILE: | |
525 | /* non-fatal; follow return path */ | |
526 | break; | |
527 | case READ_GITFILE_ERR_OPEN_FAILED: | |
528 | die_errno("Error opening '%s'", path); | |
529 | case READ_GITFILE_ERR_TOO_LARGE: | |
530 | die("Too large to be a .git file: '%s'", path); | |
531 | case READ_GITFILE_ERR_READ_FAILED: | |
532 | die("Error reading %s", path); | |
533 | case READ_GITFILE_ERR_INVALID_FORMAT: | |
534 | die("Invalid gitfile format: %s", path); | |
535 | case READ_GITFILE_ERR_NO_PATH: | |
536 | die("No path in gitfile: %s", path); | |
537 | case READ_GITFILE_ERR_NOT_A_REPO: | |
538 | die("Not a git repository: %s", dir); | |
539 | default: | |
540 | die("BUG: unknown error code"); | |
541 | } | |
542 | } | |
543 | ||
b44ebb19 LH |
544 | /* |
545 | * Try to read the location of the git directory from the .git file, | |
ea1d8756 HWN |
546 | * return path to git directory if found. The return value comes from |
547 | * a shared buffer. | |
a93bedad EE |
548 | * |
549 | * On failure, if return_error_code is not NULL, return_error_code | |
550 | * will be set to an error code and NULL will be returned. If | |
551 | * return_error_code is NULL the function will die instead (for most | |
552 | * cases). | |
b44ebb19 | 553 | */ |
a93bedad | 554 | const char *read_gitfile_gently(const char *path, int *return_error_code) |
b44ebb19 | 555 | { |
921bdd96 | 556 | const int max_file_size = 1 << 20; /* 1MB */ |
a93bedad EE |
557 | int error_code = 0; |
558 | char *buf = NULL; | |
559 | char *dir = NULL; | |
40c813e0 | 560 | const char *slash; |
b44ebb19 LH |
561 | struct stat st; |
562 | int fd; | |
b1905aea | 563 | ssize_t len; |
b44ebb19 | 564 | |
a93bedad | 565 | if (stat(path, &st)) { |
5c4003ca | 566 | /* NEEDSWORK: discern between ENOENT vs other errors */ |
a93bedad EE |
567 | error_code = READ_GITFILE_ERR_STAT_FAILED; |
568 | goto cleanup_return; | |
569 | } | |
570 | if (!S_ISREG(st.st_mode)) { | |
571 | error_code = READ_GITFILE_ERR_NOT_A_FILE; | |
572 | goto cleanup_return; | |
573 | } | |
921bdd96 EE |
574 | if (st.st_size > max_file_size) { |
575 | error_code = READ_GITFILE_ERR_TOO_LARGE; | |
576 | goto cleanup_return; | |
577 | } | |
b44ebb19 | 578 | fd = open(path, O_RDONLY); |
a93bedad EE |
579 | if (fd < 0) { |
580 | error_code = READ_GITFILE_ERR_OPEN_FAILED; | |
581 | goto cleanup_return; | |
582 | } | |
3733e694 | 583 | buf = xmallocz(st.st_size); |
b44ebb19 LH |
584 | len = read_in_full(fd, buf, st.st_size); |
585 | close(fd); | |
a93bedad EE |
586 | if (len != st.st_size) { |
587 | error_code = READ_GITFILE_ERR_READ_FAILED; | |
588 | goto cleanup_return; | |
589 | } | |
a93bedad EE |
590 | if (!starts_with(buf, "gitdir: ")) { |
591 | error_code = READ_GITFILE_ERR_INVALID_FORMAT; | |
592 | goto cleanup_return; | |
593 | } | |
b44ebb19 LH |
594 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') |
595 | len--; | |
a93bedad EE |
596 | if (len < 9) { |
597 | error_code = READ_GITFILE_ERR_NO_PATH; | |
598 | goto cleanup_return; | |
599 | } | |
b44ebb19 | 600 | buf[len] = '\0'; |
40c813e0 BK |
601 | dir = buf + 8; |
602 | ||
603 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
604 | size_t pathlen = slash+1 - path; | |
75faa45a JK |
605 | dir = xstrfmt("%.*s%.*s", (int)pathlen, path, |
606 | (int)(len - 8), buf + 8); | |
40c813e0 BK |
607 | free(buf); |
608 | buf = dir; | |
609 | } | |
a93bedad EE |
610 | if (!is_git_directory(dir)) { |
611 | error_code = READ_GITFILE_ERR_NOT_A_REPO; | |
612 | goto cleanup_return; | |
613 | } | |
e2a57aac | 614 | path = real_path(dir); |
40c813e0 | 615 | |
a93bedad | 616 | cleanup_return: |
a93bedad EE |
617 | if (return_error_code) |
618 | *return_error_code = error_code; | |
5f29433f SB |
619 | else if (error_code) |
620 | read_gitfile_error_die(error_code, path, dir); | |
a93bedad | 621 | |
b44ebb19 | 622 | free(buf); |
38ae8784 | 623 | return error_code ? NULL : path; |
b44ebb19 LH |
624 | } |
625 | ||
e4e30347 | 626 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
7333ed17 | 627 | struct strbuf *cwd, |
b3f66fd3 | 628 | int *nongit_ok) |
e4e30347 | 629 | { |
b3f66fd3 NTND |
630 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
631 | const char *worktree; | |
632 | char *gitfile; | |
9b125da4 | 633 | int offset; |
e4e30347 JN |
634 | |
635 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
636 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
b3f66fd3 | 637 | |
13d6ec91 | 638 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
639 | if (gitfile) { |
640 | gitfile = xstrdup(gitfile); | |
641 | gitdirenv = gitfile; | |
642 | } | |
643 | ||
e4e30347 JN |
644 | if (!is_git_directory(gitdirenv)) { |
645 | if (nongit_ok) { | |
646 | *nongit_ok = 1; | |
b3f66fd3 | 647 | free(gitfile); |
e4e30347 JN |
648 | return NULL; |
649 | } | |
650 | die("Not a git repository: '%s'", gitdirenv); | |
651 | } | |
b3f66fd3 NTND |
652 | |
653 | if (check_repository_format_gently(gitdirenv, nongit_ok)) { | |
654 | free(gitfile); | |
655 | return NULL; | |
e4e30347 | 656 | } |
b3f66fd3 NTND |
657 | |
658 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
659 | if (work_tree_env) | |
660 | set_git_work_tree(work_tree_env); | |
661 | else if (is_bare_repository_cfg > 0) { | |
fada7674 JK |
662 | if (git_work_tree_cfg) { |
663 | /* #22.2, #30 */ | |
664 | warning("core.bare and core.worktree do not make sense"); | |
665 | work_tree_config_is_bogus = 1; | |
666 | } | |
b3f66fd3 NTND |
667 | |
668 | /* #18, #26 */ | |
669 | set_git_dir(gitdirenv); | |
670 | free(gitfile); | |
e4e30347 | 671 | return NULL; |
b3f66fd3 NTND |
672 | } |
673 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
674 | if (is_absolute_path(git_work_tree_cfg)) | |
675 | set_git_work_tree(git_work_tree_cfg); | |
676 | else { | |
56b9f6e7 | 677 | char *core_worktree; |
b3f66fd3 NTND |
678 | if (chdir(gitdirenv)) |
679 | die_errno("Could not chdir to '%s'", gitdirenv); | |
680 | if (chdir(git_work_tree_cfg)) | |
681 | die_errno("Could not chdir to '%s'", git_work_tree_cfg); | |
56b9f6e7 | 682 | core_worktree = xgetcwd(); |
7333ed17 | 683 | if (chdir(cwd->buf)) |
b3f66fd3 NTND |
684 | die_errno("Could not come back to cwd"); |
685 | set_git_work_tree(core_worktree); | |
56b9f6e7 | 686 | free(core_worktree); |
b3f66fd3 NTND |
687 | } |
688 | } | |
2cd83d10 JK |
689 | else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) { |
690 | /* #16d */ | |
691 | set_git_dir(gitdirenv); | |
692 | free(gitfile); | |
693 | return NULL; | |
694 | } | |
b3f66fd3 NTND |
695 | else /* #2, #10 */ |
696 | set_git_work_tree("."); | |
697 | ||
698 | /* set_git_work_tree() must have been called by now */ | |
699 | worktree = get_git_work_tree(); | |
700 | ||
701 | /* both get_git_work_tree() and cwd are already normalized */ | |
7333ed17 | 702 | if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */ |
b3f66fd3 NTND |
703 | set_git_dir(gitdirenv); |
704 | free(gitfile); | |
e4e30347 | 705 | return NULL; |
b3f66fd3 | 706 | } |
e4e30347 | 707 | |
7333ed17 | 708 | offset = dir_inside_of(cwd->buf, worktree); |
9b125da4 | 709 | if (offset >= 0) { /* cwd inside worktree? */ |
e2a57aac | 710 | set_git_dir(real_path(gitdirenv)); |
b3f66fd3 NTND |
711 | if (chdir(worktree)) |
712 | die_errno("Could not chdir to '%s'", worktree); | |
7333ed17 | 713 | strbuf_addch(cwd, '/'); |
b3f66fd3 | 714 | free(gitfile); |
7333ed17 | 715 | return cwd->buf + offset; |
93a00542 | 716 | } |
b3f66fd3 NTND |
717 | |
718 | /* cwd outside worktree */ | |
719 | set_git_dir(gitdirenv); | |
720 | free(gitfile); | |
721 | return NULL; | |
93a00542 JN |
722 | } |
723 | ||
9951d3b3 | 724 | static const char *setup_discovered_git_dir(const char *gitdir, |
7333ed17 | 725 | struct strbuf *cwd, int offset, |
9951d3b3 | 726 | int *nongit_ok) |
98937bef | 727 | { |
9951d3b3 NTND |
728 | if (check_repository_format_gently(gitdir, nongit_ok)) |
729 | return NULL; | |
98937bef | 730 | |
4868b2ea JN |
731 | /* --work-tree is set without --git-dir; use discovered one */ |
732 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
2d4dcf21 JS |
733 | char *to_free = NULL; |
734 | const char *ret; | |
735 | ||
7333ed17 | 736 | if (offset != cwd->len && !is_absolute_path(gitdir)) |
2d4dcf21 | 737 | gitdir = to_free = real_pathdup(gitdir, 1); |
7333ed17 | 738 | if (chdir(cwd->buf)) |
4868b2ea | 739 | die_errno("Could not come back to cwd"); |
2d4dcf21 JS |
740 | ret = setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
741 | free(to_free); | |
742 | return ret; | |
4868b2ea JN |
743 | } |
744 | ||
9951d3b3 NTND |
745 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
746 | if (is_bare_repository_cfg > 0) { | |
7333ed17 RS |
747 | set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir)); |
748 | if (chdir(cwd->buf)) | |
9951d3b3 | 749 | die_errno("Could not come back to cwd"); |
98937bef | 750 | return NULL; |
9951d3b3 | 751 | } |
98937bef | 752 | |
9951d3b3 NTND |
753 | /* #0, #1, #5, #8, #9, #12, #13 */ |
754 | set_git_work_tree("."); | |
755 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
756 | set_git_dir(gitdir); | |
98937bef | 757 | inside_git_dir = 0; |
9951d3b3 | 758 | inside_work_tree = 1; |
7333ed17 | 759 | if (offset == cwd->len) |
98937bef NTND |
760 | return NULL; |
761 | ||
df380d58 JS |
762 | /* Make "offset" point past the '/' (already the case for root dirs) */ |
763 | if (offset != offset_1st_component(cwd->buf)) | |
764 | offset++; | |
765 | /* Add a '/' at the end */ | |
7333ed17 RS |
766 | strbuf_addch(cwd, '/'); |
767 | return cwd->buf + offset; | |
98937bef NTND |
768 | } |
769 | ||
1cd8031b | 770 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
7333ed17 RS |
771 | static const char *setup_bare_git_dir(struct strbuf *cwd, int offset, |
772 | int *nongit_ok) | |
68698da5 JN |
773 | { |
774 | int root_len; | |
775 | ||
1cd8031b NTND |
776 | if (check_repository_format_gently(".", nongit_ok)) |
777 | return NULL; | |
778 | ||
2cd83d10 JK |
779 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
780 | ||
4868b2ea JN |
781 | /* --work-tree is set without --git-dir; use discovered one */ |
782 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
da6f8475 | 783 | static const char *gitdir; |
4868b2ea | 784 | |
7333ed17 RS |
785 | gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset); |
786 | if (chdir(cwd->buf)) | |
4868b2ea | 787 | die_errno("Could not come back to cwd"); |
7333ed17 | 788 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
4868b2ea JN |
789 | } |
790 | ||
68698da5 | 791 | inside_git_dir = 1; |
1cd8031b | 792 | inside_work_tree = 0; |
7333ed17 RS |
793 | if (offset != cwd->len) { |
794 | if (chdir(cwd->buf)) | |
8fc0ae80 | 795 | die_errno("Cannot come back to cwd"); |
7333ed17 RS |
796 | root_len = offset_1st_component(cwd->buf); |
797 | strbuf_setlen(cwd, offset > root_len ? offset : root_len); | |
798 | set_git_dir(cwd->buf); | |
337e51ce | 799 | } |
1cd8031b | 800 | else |
68698da5 | 801 | set_git_dir("."); |
68698da5 JN |
802 | return NULL; |
803 | } | |
804 | ||
f161edeb JN |
805 | static const char *setup_nongit(const char *cwd, int *nongit_ok) |
806 | { | |
807 | if (!nongit_ok) | |
2ff30e67 | 808 | die(_("Not a git repository (or any of the parent directories): %s"), DEFAULT_GIT_DIR_ENVIRONMENT); |
f161edeb | 809 | if (chdir(cwd)) |
2ff30e67 | 810 | die_errno(_("Cannot come back to cwd")); |
f161edeb JN |
811 | *nongit_ok = 1; |
812 | return NULL; | |
813 | } | |
814 | ||
2565b43b | 815 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
60c98d1e JN |
816 | { |
817 | struct stat buf; | |
2565b43b CB |
818 | if (stat(path, &buf)) { |
819 | die_errno("failed to stat '%*s%s%s'", | |
820 | prefix_len, | |
60c98d1e JN |
821 | prefix ? prefix : "", |
822 | prefix ? "/" : "", path); | |
2565b43b | 823 | } |
60c98d1e JN |
824 | return buf.st_dev; |
825 | } | |
826 | ||
9e2326c7 | 827 | /* |
1b77d83c MH |
828 | * A "string_list_each_func_t" function that canonicalizes an entry |
829 | * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or | |
7ec30aaa MH |
830 | * discards it if unusable. The presence of an empty entry in |
831 | * GIT_CEILING_DIRECTORIES turns off canonicalization for all | |
832 | * subsequent entries. | |
9e2326c7 | 833 | */ |
1b77d83c | 834 | static int canonicalize_ceiling_entry(struct string_list_item *item, |
7ec30aaa | 835 | void *cb_data) |
9e2326c7 | 836 | { |
7ec30aaa | 837 | int *empty_entry_found = cb_data; |
1b77d83c | 838 | char *ceil = item->string; |
9e2326c7 | 839 | |
7ec30aaa MH |
840 | if (!*ceil) { |
841 | *empty_entry_found = 1; | |
9e2326c7 | 842 | return 0; |
7ec30aaa | 843 | } else if (!is_absolute_path(ceil)) { |
9e2326c7 | 844 | return 0; |
7ec30aaa MH |
845 | } else if (*empty_entry_found) { |
846 | /* Keep entry but do not canonicalize it */ | |
847 | return 1; | |
848 | } else { | |
ce83eadd | 849 | char *real_path = real_pathdup(ceil, 0); |
4ac9006f | 850 | if (!real_path) { |
7ec30aaa | 851 | return 0; |
4ac9006f | 852 | } |
7ec30aaa | 853 | free(item->string); |
4ac9006f | 854 | item->string = real_path; |
7ec30aaa MH |
855 | return 1; |
856 | } | |
9e2326c7 MH |
857 | } |
858 | ||
ce9b8aab JS |
859 | enum discovery_result { |
860 | GIT_DIR_NONE = 0, | |
861 | GIT_DIR_EXPLICIT, | |
862 | GIT_DIR_DISCOVERED, | |
863 | GIT_DIR_BARE, | |
864 | /* these are errors */ | |
865 | GIT_DIR_HIT_CEILING = -1, | |
01017dce JS |
866 | GIT_DIR_HIT_MOUNT_POINT = -2, |
867 | GIT_DIR_INVALID_GITFILE = -3 | |
ce9b8aab JS |
868 | }; |
869 | ||
e90fdc39 JS |
870 | /* |
871 | * We cannot decide in this function whether we are in the work tree or | |
872 | * not, since the config can only be read _after_ this function was called. | |
ce9b8aab JS |
873 | * |
874 | * Also, we avoid changing any global state (such as the current working | |
875 | * directory) to allow early callers. | |
876 | * | |
877 | * The directory where the search should start needs to be passed in via the | |
878 | * `dir` parameter; upon return, the `dir` buffer will contain the path of | |
879 | * the directory where the search ended, and `gitdir` will contain the path of | |
880 | * the discovered .git/ directory, if any. If `gitdir` is not absolute, it | |
881 | * is relative to `dir` (i.e. *not* necessarily the cwd). | |
e90fdc39 | 882 | */ |
ce9b8aab | 883 | static enum discovery_result setup_git_directory_gently_1(struct strbuf *dir, |
01017dce JS |
884 | struct strbuf *gitdir, |
885 | int die_on_error) | |
d288a700 | 886 | { |
0454dd93 | 887 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
31171d9e | 888 | struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; |
ce9b8aab JS |
889 | const char *gitdirenv; |
890 | int ceil_offset = -1, min_offset = has_dos_drive_prefix(dir->buf) ? 3 : 1; | |
c7d1d1b1 RH |
891 | dev_t current_device = 0; |
892 | int one_filesystem = 1; | |
d288a700 | 893 | |
e90fdc39 JS |
894 | /* |
895 | * If GIT_DIR is set explicitly, we're not going | |
896 | * to do any discovery, but we still do repository | |
897 | * validation. | |
898 | */ | |
ad1a382f | 899 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
ce9b8aab JS |
900 | if (gitdirenv) { |
901 | strbuf_addstr(gitdir, gitdirenv); | |
902 | return GIT_DIR_EXPLICIT; | |
903 | } | |
d288a700 | 904 | |
31171d9e | 905 | if (env_ceiling_dirs) { |
7ec30aaa MH |
906 | int empty_entry_found = 0; |
907 | ||
31171d9e | 908 | string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); |
1b77d83c | 909 | filter_string_list(&ceiling_dirs, 0, |
7ec30aaa | 910 | canonicalize_ceiling_entry, &empty_entry_found); |
ce9b8aab | 911 | ceil_offset = longest_ancestor_length(dir->buf, &ceiling_dirs); |
31171d9e MH |
912 | string_list_clear(&ceiling_dirs, 0); |
913 | } | |
914 | ||
ce9b8aab JS |
915 | if (ceil_offset < 0) |
916 | ceil_offset = min_offset - 2; | |
d288a700 | 917 | |
892c41b9 | 918 | /* |
ce9b8aab | 919 | * Test in the following order (relative to the dir): |
b44ebb19 | 920 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
921 | * - .git/ |
922 | * - ./ (bare) | |
b44ebb19 | 923 | * - ../.git |
e90fdc39 JS |
924 | * - ../.git/ |
925 | * - ../ (bare) | |
926 | * - ../../.git/ | |
927 | * etc. | |
892c41b9 | 928 | */ |
cf87463e | 929 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e | 930 | if (one_filesystem) |
ce9b8aab | 931 | current_device = get_device_or_die(dir->buf, NULL, 0); |
e90fdc39 | 932 | for (;;) { |
01017dce | 933 | int offset = dir->len, error_code = 0; |
ce9b8aab JS |
934 | |
935 | if (offset > min_offset) | |
936 | strbuf_addch(dir, '/'); | |
937 | strbuf_addstr(dir, DEFAULT_GIT_DIR_ENVIRONMENT); | |
01017dce JS |
938 | gitdirenv = read_gitfile_gently(dir->buf, die_on_error ? |
939 | NULL : &error_code); | |
940 | if (!gitdirenv) { | |
941 | if (die_on_error || | |
942 | error_code == READ_GITFILE_ERR_NOT_A_FILE) { | |
5c4003ca | 943 | /* NEEDSWORK: fail if .git is not file nor dir */ |
01017dce JS |
944 | if (is_git_directory(dir->buf)) |
945 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
946 | } else if (error_code != READ_GITFILE_ERR_STAT_FAILED) | |
947 | return GIT_DIR_INVALID_GITFILE; | |
9951d3b3 | 948 | } |
ce9b8aab | 949 | strbuf_setlen(dir, offset); |
9951d3b3 | 950 | if (gitdirenv) { |
ce9b8aab JS |
951 | strbuf_addstr(gitdir, gitdirenv); |
952 | return GIT_DIR_DISCOVERED; | |
9951d3b3 | 953 | } |
9951d3b3 | 954 | |
ce9b8aab JS |
955 | if (is_git_directory(dir->buf)) { |
956 | strbuf_addstr(gitdir, "."); | |
957 | return GIT_DIR_BARE; | |
502ffe34 | 958 | } |
9951d3b3 | 959 | |
ce9b8aab JS |
960 | if (offset <= min_offset) |
961 | return GIT_DIR_HIT_CEILING; | |
1cd8031b | 962 | |
ce9b8aab | 963 | while (--offset > ceil_offset && !is_dir_sep(dir->buf[offset])) |
6c1e6544 | 964 | ; /* continue */ |
ce9b8aab JS |
965 | if (offset <= ceil_offset) |
966 | return GIT_DIR_HIT_CEILING; | |
967 | ||
968 | strbuf_setlen(dir, offset > min_offset ? offset : min_offset); | |
969 | if (one_filesystem && | |
970 | current_device != get_device_or_die(dir->buf, NULL, offset)) | |
971 | return GIT_DIR_HIT_MOUNT_POINT; | |
892c41b9 | 972 | } |
d288a700 | 973 | } |
5e7bfe25 | 974 | |
d3fb71b3 BW |
975 | int discover_git_directory(struct strbuf *commondir, |
976 | struct strbuf *gitdir) | |
16ac8b8d JS |
977 | { |
978 | struct strbuf dir = STRBUF_INIT, err = STRBUF_INIT; | |
979 | size_t gitdir_offset = gitdir->len, cwd_len; | |
d3fb71b3 | 980 | size_t commondir_offset = commondir->len; |
16ac8b8d JS |
981 | struct repository_format candidate; |
982 | ||
983 | if (strbuf_getcwd(&dir)) | |
d3fb71b3 | 984 | return -1; |
16ac8b8d JS |
985 | |
986 | cwd_len = dir.len; | |
01017dce | 987 | if (setup_git_directory_gently_1(&dir, gitdir, 0) <= 0) { |
16ac8b8d | 988 | strbuf_release(&dir); |
d3fb71b3 | 989 | return -1; |
16ac8b8d JS |
990 | } |
991 | ||
992 | /* | |
993 | * The returned gitdir is relative to dir, and if dir does not reflect | |
994 | * the current working directory, we simply make the gitdir absolute. | |
995 | */ | |
996 | if (dir.len < cwd_len && !is_absolute_path(gitdir->buf + gitdir_offset)) { | |
997 | /* Avoid a trailing "/." */ | |
998 | if (!strcmp(".", gitdir->buf + gitdir_offset)) | |
999 | strbuf_setlen(gitdir, gitdir_offset); | |
1000 | else | |
1001 | strbuf_addch(&dir, '/'); | |
1002 | strbuf_insert(gitdir, gitdir_offset, dir.buf, dir.len); | |
1003 | } | |
1004 | ||
d3fb71b3 BW |
1005 | get_common_dir(commondir, gitdir->buf + gitdir_offset); |
1006 | ||
16ac8b8d | 1007 | strbuf_reset(&dir); |
d3fb71b3 | 1008 | strbuf_addf(&dir, "%s/config", commondir->buf + commondir_offset); |
16ac8b8d JS |
1009 | read_repository_format(&candidate, dir.buf); |
1010 | strbuf_release(&dir); | |
1011 | ||
1012 | if (verify_repository_format(&candidate, &err) < 0) { | |
1013 | warning("ignoring git dir '%s': %s", | |
1014 | gitdir->buf + gitdir_offset, err.buf); | |
1015 | strbuf_release(&err); | |
d3fb71b3 | 1016 | strbuf_setlen(commondir, commondir_offset); |
69743f9b | 1017 | strbuf_setlen(gitdir, gitdir_offset); |
d3fb71b3 | 1018 | return -1; |
16ac8b8d JS |
1019 | } |
1020 | ||
d3fb71b3 | 1021 | return 0; |
16ac8b8d JS |
1022 | } |
1023 | ||
a60645f9 NTND |
1024 | const char *setup_git_directory_gently(int *nongit_ok) |
1025 | { | |
ce9b8aab JS |
1026 | static struct strbuf cwd = STRBUF_INIT; |
1027 | struct strbuf dir = STRBUF_INIT, gitdir = STRBUF_INIT; | |
f9ee2fcd | 1028 | const char *prefix; |
a60645f9 | 1029 | |
ce9b8aab JS |
1030 | /* |
1031 | * We may have read an incomplete configuration before | |
1032 | * setting-up the git directory. If so, clear the cache so | |
1033 | * that the next queries to the configuration reload complete | |
1034 | * configuration (including the per-repo config file that we | |
1035 | * ignored previously). | |
1036 | */ | |
1037 | git_config_clear(); | |
1038 | ||
1039 | /* | |
1040 | * Let's assume that we are in a git repository. | |
1041 | * If it turns out later that we are somewhere else, the value will be | |
1042 | * updated accordingly. | |
1043 | */ | |
1044 | if (nongit_ok) | |
1045 | *nongit_ok = 0; | |
1046 | ||
1047 | if (strbuf_getcwd(&cwd)) | |
1048 | die_errno(_("Unable to read current working directory")); | |
1049 | strbuf_addbuf(&dir, &cwd); | |
1050 | ||
01017dce | 1051 | switch (setup_git_directory_gently_1(&dir, &gitdir, 1)) { |
ce9b8aab JS |
1052 | case GIT_DIR_NONE: |
1053 | prefix = NULL; | |
1054 | break; | |
1055 | case GIT_DIR_EXPLICIT: | |
1056 | prefix = setup_explicit_git_dir(gitdir.buf, &cwd, nongit_ok); | |
1057 | break; | |
1058 | case GIT_DIR_DISCOVERED: | |
1059 | if (dir.len < cwd.len && chdir(dir.buf)) | |
1060 | die(_("Cannot change to '%s'"), dir.buf); | |
1061 | prefix = setup_discovered_git_dir(gitdir.buf, &cwd, dir.len, | |
1062 | nongit_ok); | |
1063 | break; | |
1064 | case GIT_DIR_BARE: | |
1065 | if (dir.len < cwd.len && chdir(dir.buf)) | |
1066 | die(_("Cannot change to '%s'"), dir.buf); | |
1067 | prefix = setup_bare_git_dir(&cwd, dir.len, nongit_ok); | |
1068 | break; | |
1069 | case GIT_DIR_HIT_CEILING: | |
1070 | prefix = setup_nongit(cwd.buf, nongit_ok); | |
1071 | break; | |
1072 | case GIT_DIR_HIT_MOUNT_POINT: | |
1073 | if (nongit_ok) { | |
1074 | *nongit_ok = 1; | |
1075 | strbuf_release(&cwd); | |
1076 | strbuf_release(&dir); | |
1077 | return NULL; | |
1078 | } | |
1079 | die(_("Not a git repository (or any parent up to mount point %s)\n" | |
1080 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."), | |
1081 | dir.buf); | |
1082 | default: | |
1083 | die("BUG: unhandled setup_git_directory_1() result"); | |
1084 | } | |
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 | ||
73f192c9 BW |
1094 | /* |
1095 | * Not all paths through the setup code will call 'set_git_dir()' (which | |
1096 | * directly sets up the environment) so in order to guarantee that the | |
1097 | * environment is in a consistent state after setup, explicitly setup | |
1098 | * the environment if we have a repository. | |
1099 | * | |
1100 | * NEEDSWORK: currently we allow bogus GIT_DIR values to be set in some | |
1101 | * code paths so we also need to explicitly setup the environment if | |
1102 | * the user has set GIT_DIR. It may be beneficial to disallow bogus | |
1103 | * GIT_DIR values at some point in the future. | |
1104 | */ | |
c14c234f BW |
1105 | if (startup_info->have_repository || getenv(GIT_DIR_ENVIRONMENT)) { |
1106 | if (!the_repository->gitdir) { | |
1107 | const char *gitdir = getenv(GIT_DIR_ENVIRONMENT); | |
1108 | if (!gitdir) | |
1109 | gitdir = DEFAULT_GIT_DIR_ENVIRONMENT; | |
1110 | repo_set_gitdir(the_repository, gitdir); | |
1111 | setup_git_env(); | |
1112 | } | |
1113 | } | |
73f192c9 | 1114 | |
ce9b8aab JS |
1115 | strbuf_release(&dir); |
1116 | strbuf_release(&gitdir); | |
1117 | ||
a60645f9 NTND |
1118 | return prefix; |
1119 | } | |
1120 | ||
94df2506 JH |
1121 | int git_config_perm(const char *var, const char *value) |
1122 | { | |
06cbe855 HO |
1123 | int i; |
1124 | char *endptr; | |
1125 | ||
1126 | if (value == NULL) | |
1127 | return PERM_GROUP; | |
1128 | ||
1129 | if (!strcmp(value, "umask")) | |
1130 | return PERM_UMASK; | |
1131 | if (!strcmp(value, "group")) | |
1132 | return PERM_GROUP; | |
1133 | if (!strcmp(value, "all") || | |
1134 | !strcmp(value, "world") || | |
1135 | !strcmp(value, "everybody")) | |
1136 | return PERM_EVERYBODY; | |
1137 | ||
1138 | /* Parse octal numbers */ | |
1139 | i = strtol(value, &endptr, 8); | |
1140 | ||
1141 | /* If not an octal number, maybe true/false? */ | |
1142 | if (*endptr != 0) | |
1143 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
1144 | ||
1145 | /* | |
1146 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 1147 | * a chmod value to restrict to. |
06cbe855 HO |
1148 | */ |
1149 | switch (i) { | |
1150 | case PERM_UMASK: /* 0 */ | |
1151 | return PERM_UMASK; | |
1152 | case OLD_PERM_GROUP: /* 1 */ | |
1153 | return PERM_GROUP; | |
1154 | case OLD_PERM_EVERYBODY: /* 2 */ | |
1155 | return PERM_EVERYBODY; | |
94df2506 | 1156 | } |
06cbe855 HO |
1157 | |
1158 | /* A filemode value was given: 0xxx */ | |
1159 | ||
1160 | if ((i & 0600) != 0600) | |
2ff30e67 | 1161 | die(_("Problem with core.sharedRepository filemode value " |
06cbe855 | 1162 | "(0%.3o).\nThe owner of files must always have " |
2ff30e67 | 1163 | "read and write permissions."), i); |
06cbe855 HO |
1164 | |
1165 | /* | |
1166 | * Mask filemode value. Others can not get write permission. | |
1167 | * x flags for directories are handled separately. | |
1168 | */ | |
5a688fe4 | 1169 | return -(i & 0666); |
94df2506 JH |
1170 | } |
1171 | ||
4b0d1eeb | 1172 | void check_repository_format(void) |
ab9cb76f | 1173 | { |
f1c126bd JK |
1174 | check_repository_format_gently(get_git_dir(), NULL); |
1175 | startup_info->have_repository = 1; | |
ab9cb76f JH |
1176 | } |
1177 | ||
e1e5ec86 CB |
1178 | /* |
1179 | * Returns the "prefix", a path to the current working directory | |
1180 | * relative to the work tree root, or NULL, if the current working | |
1181 | * directory is not a strict subdirectory of the work tree root. The | |
1182 | * prefix always ends with a '/' character. | |
1183 | */ | |
5e7bfe25 JH |
1184 | const char *setup_git_directory(void) |
1185 | { | |
b3f66fd3 | 1186 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 1187 | } |
abc06822 | 1188 | |
40d96325 | 1189 | const char *resolve_gitdir_gently(const char *suspect, int *return_error_code) |
abc06822 FG |
1190 | { |
1191 | if (is_git_directory(suspect)) | |
1192 | return suspect; | |
40d96325 | 1193 | return read_gitfile_gently(suspect, return_error_code); |
abc06822 | 1194 | } |
1d999ddd TR |
1195 | |
1196 | /* if any standard file descriptor is missing open it to /dev/null */ | |
1197 | void sanitize_stdfds(void) | |
1198 | { | |
1199 | int fd = open("/dev/null", O_RDWR, 0); | |
1200 | while (fd != -1 && fd < 2) | |
1201 | fd = dup(fd); | |
1202 | if (fd == -1) | |
1203 | die_errno("open /dev/null or dup failed"); | |
1204 | if (fd > 2) | |
1205 | close(fd); | |
1206 | } | |
de0957ce NTND |
1207 | |
1208 | int daemonize(void) | |
1209 | { | |
1210 | #ifdef NO_POSIX_GOODIES | |
1211 | errno = ENOSYS; | |
1212 | return -1; | |
1213 | #else | |
1214 | switch (fork()) { | |
1215 | case 0: | |
1216 | break; | |
1217 | case -1: | |
1218 | die_errno("fork failed"); | |
1219 | default: | |
1220 | exit(0); | |
1221 | } | |
1222 | if (setsid() == -1) | |
1223 | die_errno("setsid failed"); | |
1224 | close(0); | |
1225 | close(1); | |
1226 | close(2); | |
1227 | sanitize_stdfds(); | |
1228 | return 0; | |
1229 | #endif | |
1230 | } |