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Commit | Line | Data |
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d288a700 | 1 | #include "cache.h" |
c14c234f | 2 | #include "repository.h" |
b2141fc1 | 3 | #include "config.h" |
e90fdc39 | 4 | #include "dir.h" |
31171d9e | 5 | #include "string-list.h" |
8500e0de | 6 | #include "chdir-notify.h" |
60b7a92d | 7 | #include "promisor-remote.h" |
e90fdc39 JS |
8 | |
9 | static int inside_git_dir = -1; | |
10 | static int inside_work_tree = -1; | |
fada7674 | 11 | static int work_tree_config_is_bogus; |
d288a700 | 12 | |
46c3cd44 JK |
13 | static struct startup_info the_startup_info; |
14 | struct startup_info *startup_info = &the_startup_info; | |
15 | ||
ddc2a628 MEW |
16 | /* |
17 | * The input parameter must contain an absolute path, and it must already be | |
18 | * normalized. | |
19 | * | |
20 | * Find the part of an absolute path that lies inside the work tree by | |
21 | * dereferencing symlinks outside the work tree, for example: | |
22 | * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file | |
23 | * /dir/file (work tree is /) -> dir/file | |
24 | * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2 | |
25 | * /dir/repolink/file (repolink points to /dir/repo) -> file | |
26 | * /dir/repo (exactly equal to work tree) -> (empty string) | |
27 | */ | |
28 | static int abspath_part_inside_repo(char *path) | |
29 | { | |
30 | size_t len; | |
31 | size_t wtlen; | |
32 | char *path0; | |
33 | int off; | |
34 | const char *work_tree = get_git_work_tree(); | |
3d7747e3 | 35 | struct strbuf realpath = STRBUF_INIT; |
ddc2a628 MEW |
36 | |
37 | if (!work_tree) | |
38 | return -1; | |
39 | wtlen = strlen(work_tree); | |
40 | len = strlen(path); | |
6127ff63 | 41 | off = offset_1st_component(path); |
ddc2a628 MEW |
42 | |
43 | /* check if work tree is already the prefix */ | |
d8727b36 | 44 | if (wtlen <= len && !fspathncmp(path, work_tree, wtlen)) { |
ddc2a628 MEW |
45 | if (path[wtlen] == '/') { |
46 | memmove(path, path + wtlen + 1, len - wtlen); | |
47 | return 0; | |
48 | } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') { | |
49 | /* work tree is the root, or the whole path */ | |
50 | memmove(path, path + wtlen, len - wtlen + 1); | |
51 | return 0; | |
52 | } | |
53 | /* work tree might match beginning of a symlink to work tree */ | |
54 | off = wtlen; | |
55 | } | |
56 | path0 = path; | |
6127ff63 | 57 | path += off; |
ddc2a628 MEW |
58 | |
59 | /* check each '/'-terminated level */ | |
60 | while (*path) { | |
61 | path++; | |
62 | if (*path == '/') { | |
63 | *path = '\0'; | |
3d7747e3 AM |
64 | strbuf_realpath(&realpath, path0, 1); |
65 | if (fspathcmp(realpath.buf, work_tree) == 0) { | |
ddc2a628 | 66 | memmove(path0, path + 1, len - (path - path0)); |
3d7747e3 | 67 | strbuf_release(&realpath); |
ddc2a628 MEW |
68 | return 0; |
69 | } | |
70 | *path = '/'; | |
71 | } | |
72 | } | |
73 | ||
74 | /* check whole path */ | |
3d7747e3 AM |
75 | strbuf_realpath(&realpath, path0, 1); |
76 | if (fspathcmp(realpath.buf, work_tree) == 0) { | |
ddc2a628 | 77 | *path0 = '\0'; |
3d7747e3 | 78 | strbuf_release(&realpath); |
ddc2a628 MEW |
79 | return 0; |
80 | } | |
81 | ||
3d7747e3 | 82 | strbuf_release(&realpath); |
ddc2a628 MEW |
83 | return -1; |
84 | } | |
85 | ||
645a29c4 NTND |
86 | /* |
87 | * Normalize "path", prepending the "prefix" for relative paths. If | |
88 | * remaining_prefix is not NULL, return the actual prefix still | |
89 | * remains in the path. For example, prefix = sub1/sub2/ and path is | |
90 | * | |
91 | * foo -> sub1/sub2/foo (full prefix) | |
92 | * ../foo -> sub1/foo (remaining prefix is sub1/) | |
93 | * ../../bar -> bar (no remaining prefix) | |
94 | * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix) | |
95 | * `pwd`/../bar -> sub1/bar (no remaining prefix) | |
96 | */ | |
97 | char *prefix_path_gently(const char *prefix, int len, | |
98 | int *remaining_prefix, const char *path) | |
d089ebaa JH |
99 | { |
100 | const char *orig = path; | |
18e051a3 CMAB |
101 | char *sanitized; |
102 | if (is_absolute_path(orig)) { | |
3733e694 | 103 | sanitized = xmallocz(strlen(path)); |
645a29c4 NTND |
104 | if (remaining_prefix) |
105 | *remaining_prefix = 0; | |
655ee9ea MEW |
106 | if (normalize_path_copy_len(sanitized, path, remaining_prefix)) { |
107 | free(sanitized); | |
108 | return NULL; | |
109 | } | |
110 | if (abspath_part_inside_repo(sanitized)) { | |
111 | free(sanitized); | |
112 | return NULL; | |
113 | } | |
18e051a3 | 114 | } else { |
24041d6b | 115 | sanitized = xstrfmt("%.*s%s", len, len ? prefix : "", path); |
645a29c4 NTND |
116 | if (remaining_prefix) |
117 | *remaining_prefix = len; | |
655ee9ea | 118 | if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) { |
546e0fd9 JK |
119 | free(sanitized); |
120 | return NULL; | |
d089ebaa | 121 | } |
d089ebaa JH |
122 | } |
123 | return sanitized; | |
f332726e LT |
124 | } |
125 | ||
546e0fd9 JK |
126 | char *prefix_path(const char *prefix, int len, const char *path) |
127 | { | |
645a29c4 | 128 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 | 129 | if (!r) |
e0020b2f ES |
130 | die(_("'%s' is outside repository at '%s'"), path, |
131 | absolute_path(get_git_work_tree())); | |
546e0fd9 JK |
132 | return r; |
133 | } | |
134 | ||
135 | int path_inside_repo(const char *prefix, const char *path) | |
136 | { | |
137 | int len = prefix ? strlen(prefix) : 0; | |
645a29c4 | 138 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
139 | if (r) { |
140 | free(r); | |
141 | return 1; | |
142 | } | |
143 | return 0; | |
144 | } | |
145 | ||
c6e8c800 JH |
146 | int check_filename(const char *prefix, const char *arg) |
147 | { | |
e4da43b1 | 148 | char *to_free = NULL; |
c6e8c800 JH |
149 | struct stat st; |
150 | ||
d51c6ee0 JK |
151 | if (skip_prefix(arg, ":/", &arg)) { |
152 | if (!*arg) /* ":/" is root dir, always exists */ | |
4db86e8b | 153 | return 1; |
a08cbcda | 154 | prefix = NULL; |
42471bce JK |
155 | } else if (skip_prefix(arg, ":!", &arg) || |
156 | skip_prefix(arg, ":^", &arg)) { | |
157 | if (!*arg) /* excluding everything is silly, but allowed */ | |
158 | return 1; | |
a08cbcda JK |
159 | } |
160 | ||
161 | if (prefix) | |
162 | arg = to_free = prefix_filename(prefix, arg); | |
163 | ||
164 | if (!lstat(arg, &st)) { | |
e4da43b1 | 165 | free(to_free); |
c6e8c800 | 166 | return 1; /* file exists */ |
e4da43b1 | 167 | } |
93dd544f | 168 | if (is_missing_file_error(errno)) { |
e4da43b1 | 169 | free(to_free); |
c6e8c800 | 170 | return 0; /* file does not exist */ |
e4da43b1 | 171 | } |
fc045fe7 | 172 | die_errno(_("failed to stat '%s'"), arg); |
c6e8c800 JH |
173 | } |
174 | ||
e270f42c NTND |
175 | static void NORETURN die_verify_filename(struct repository *r, |
176 | const char *prefix, | |
023e37c3 MM |
177 | const char *arg, |
178 | int diagnose_misspelt_rev) | |
009fee47 | 179 | { |
023e37c3 | 180 | if (!diagnose_misspelt_rev) |
ab33a76e VA |
181 | die(_("%s: no such path in the working tree.\n" |
182 | "Use 'git <command> -- <path>...' to specify paths that do not exist locally."), | |
023e37c3 | 183 | arg); |
0e539dca JH |
184 | /* |
185 | * Saying "'(icase)foo' does not exist in the index" when the | |
186 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
187 | * begins with a colon and is followed by a non-alnum; do not | |
8c135ea2 | 188 | * let maybe_die_on_misspelt_object_name() even trigger. |
0e539dca JH |
189 | */ |
190 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
e270f42c | 191 | maybe_die_on_misspelt_object_name(r, arg, prefix); |
0e539dca | 192 | |
009fee47 | 193 | /* ... or fall back the most general message. */ |
ab33a76e VA |
194 | die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n" |
195 | "Use '--' to separate paths from revisions, like this:\n" | |
196 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
009fee47 MM |
197 | |
198 | } | |
199 | ||
c99eddd8 JK |
200 | /* |
201 | * Check for arguments that don't resolve as actual files, | |
202 | * but which look sufficiently like pathspecs that we'll consider | |
203 | * them such for the purposes of rev/pathspec DWIM parsing. | |
204 | */ | |
205 | static int looks_like_pathspec(const char *arg) | |
206 | { | |
39e21c6e JK |
207 | const char *p; |
208 | int escaped = 0; | |
209 | ||
210 | /* | |
211 | * Wildcard characters imply the user is looking to match pathspecs | |
212 | * that aren't in the filesystem. Note that this doesn't include | |
213 | * backslash even though it's a glob special; by itself it doesn't | |
214 | * cause any increase in the match. Likewise ignore backslash-escaped | |
215 | * wildcard characters. | |
216 | */ | |
217 | for (p = arg; *p; p++) { | |
218 | if (escaped) { | |
219 | escaped = 0; | |
220 | } else if (is_glob_special(*p)) { | |
221 | if (*p == '\\') | |
222 | escaped = 1; | |
223 | else | |
224 | return 1; | |
225 | } | |
226 | } | |
c99eddd8 JK |
227 | |
228 | /* long-form pathspec magic */ | |
229 | if (starts_with(arg, ":(")) | |
230 | return 1; | |
231 | ||
232 | return 0; | |
233 | } | |
234 | ||
e23d0b4a LT |
235 | /* |
236 | * Verify a filename that we got as an argument for a pathspec | |
237 | * entry. Note that a filename that begins with "-" never verifies | |
238 | * as true, because even if such a filename were to exist, we want | |
239 | * it to be preceded by the "--" marker (or we want the user to | |
240 | * use a format like "./-filename") | |
023e37c3 MM |
241 | * |
242 | * The "diagnose_misspelt_rev" is used to provide a user-friendly | |
243 | * diagnosis when dying upon finding that "name" is not a pathname. | |
244 | * If set to 1, the diagnosis will try to diagnose "name" as an | |
245 | * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis | |
246 | * will only complain about an inexisting file. | |
247 | * | |
248 | * This function is typically called to check that a "file or rev" | |
249 | * argument is unambiguous. In this case, the caller will want | |
250 | * diagnose_misspelt_rev == 1 when verifying the first non-rev | |
251 | * argument (which could have been a revision), and | |
252 | * diagnose_misspelt_rev == 0 for the next ones (because we already | |
253 | * saw a filename, there's not ambiguity anymore). | |
e23d0b4a | 254 | */ |
023e37c3 MM |
255 | void verify_filename(const char *prefix, |
256 | const char *arg, | |
257 | int diagnose_misspelt_rev) | |
e23d0b4a | 258 | { |
e23d0b4a | 259 | if (*arg == '-') |
fc045fe7 | 260 | die(_("option '%s' must come before non-option arguments"), arg); |
2cb47ab6 | 261 | if (looks_like_pathspec(arg) || check_filename(prefix, arg)) |
e23d0b4a | 262 | return; |
e270f42c | 263 | die_verify_filename(the_repository, prefix, arg, diagnose_misspelt_rev); |
e23d0b4a LT |
264 | } |
265 | ||
ea92f41f JH |
266 | /* |
267 | * Opposite of the above: the command line did not have -- marker | |
268 | * and we parsed the arg as a refname. It should not be interpretable | |
269 | * as a filename. | |
270 | */ | |
271 | void verify_non_filename(const char *prefix, const char *arg) | |
272 | { | |
7ae3df8c | 273 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 274 | return; |
ea92f41f JH |
275 | if (*arg == '-') |
276 | return; /* flag */ | |
c6e8c800 JH |
277 | if (!check_filename(prefix, arg)) |
278 | return; | |
ab33a76e VA |
279 | die(_("ambiguous argument '%s': both revision and filename\n" |
280 | "Use '--' to separate paths from revisions, like this:\n" | |
281 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
ea92f41f JH |
282 | } |
283 | ||
31e26ebc | 284 | int get_common_dir(struct strbuf *sb, const char *gitdir) |
11f9dd71 MK |
285 | { |
286 | const char *git_env_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT); | |
287 | if (git_env_common_dir) { | |
288 | strbuf_addstr(sb, git_env_common_dir); | |
289 | return 1; | |
290 | } else { | |
291 | return get_common_dir_noenv(sb, gitdir); | |
292 | } | |
293 | } | |
294 | ||
295 | int get_common_dir_noenv(struct strbuf *sb, const char *gitdir) | |
4dc4e145 NTND |
296 | { |
297 | struct strbuf data = STRBUF_INIT; | |
298 | struct strbuf path = STRBUF_INIT; | |
31e26ebc | 299 | int ret = 0; |
11f9dd71 | 300 | |
4dc4e145 NTND |
301 | strbuf_addf(&path, "%s/commondir", gitdir); |
302 | if (file_exists(path.buf)) { | |
303 | if (strbuf_read_file(&data, path.buf, 0) <= 0) | |
304 | die_errno(_("failed to read %s"), path.buf); | |
305 | while (data.len && (data.buf[data.len - 1] == '\n' || | |
306 | data.buf[data.len - 1] == '\r')) | |
307 | data.len--; | |
308 | data.buf[data.len] = '\0'; | |
309 | strbuf_reset(&path); | |
310 | if (!is_absolute_path(data.buf)) | |
311 | strbuf_addf(&path, "%s/", gitdir); | |
312 | strbuf_addbuf(&path, &data); | |
33ad9ddd | 313 | strbuf_add_real_path(sb, path.buf); |
31e26ebc | 314 | ret = 1; |
4ac9006f | 315 | } else { |
4dc4e145 | 316 | strbuf_addstr(sb, gitdir); |
4ac9006f BW |
317 | } |
318 | ||
4dc4e145 NTND |
319 | strbuf_release(&data); |
320 | strbuf_release(&path); | |
31e26ebc | 321 | return ret; |
4dc4e145 | 322 | } |
d288a700 | 323 | |
5f5608bc | 324 | /* |
ad1a382f | 325 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 326 | * We want to see: |
5f5608bc | 327 | * |
790296fd | 328 | * - either an objects/ directory _or_ the proper |
5f5608bc | 329 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 330 | * - a refs/ directory |
8098a178 | 331 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
332 | * a proper "ref:", or a regular file HEAD that has a properly |
333 | * formatted sha1 object name. | |
5f5608bc | 334 | */ |
b3256eb8 | 335 | int is_git_directory(const char *suspect) |
5f5608bc | 336 | { |
1d186b6f NTND |
337 | struct strbuf path = STRBUF_INIT; |
338 | int ret = 0; | |
339 | size_t len; | |
ad1a382f | 340 | |
4dc4e145 | 341 | /* Check worktree-related signatures */ |
fa4d8c78 JK |
342 | strbuf_addstr(&path, suspect); |
343 | strbuf_complete(&path, '/'); | |
344 | strbuf_addstr(&path, "HEAD"); | |
4dc4e145 NTND |
345 | if (validate_headref(path.buf)) |
346 | goto done; | |
347 | ||
348 | strbuf_reset(&path); | |
349 | get_common_dir(&path, suspect); | |
1d186b6f | 350 | len = path.len; |
4dc4e145 NTND |
351 | |
352 | /* Check non-worktree-related signatures */ | |
ad1a382f SP |
353 | if (getenv(DB_ENVIRONMENT)) { |
354 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
1d186b6f | 355 | goto done; |
ad1a382f SP |
356 | } |
357 | else { | |
4dc4e145 | 358 | strbuf_setlen(&path, len); |
1d186b6f NTND |
359 | strbuf_addstr(&path, "/objects"); |
360 | if (access(path.buf, X_OK)) | |
361 | goto done; | |
ad1a382f SP |
362 | } |
363 | ||
1d186b6f NTND |
364 | strbuf_setlen(&path, len); |
365 | strbuf_addstr(&path, "/refs"); | |
366 | if (access(path.buf, X_OK)) | |
367 | goto done; | |
ad1a382f | 368 | |
1d186b6f NTND |
369 | ret = 1; |
370 | done: | |
371 | strbuf_release(&path); | |
372 | return ret; | |
5f5608bc LT |
373 | } |
374 | ||
ffd036b1 JK |
375 | int is_nonbare_repository_dir(struct strbuf *path) |
376 | { | |
377 | int ret = 0; | |
378 | int gitfile_error; | |
379 | size_t orig_path_len = path->len; | |
380 | assert(orig_path_len != 0); | |
381 | strbuf_complete(path, '/'); | |
382 | strbuf_addstr(path, ".git"); | |
383 | if (read_gitfile_gently(path->buf, &gitfile_error) || is_git_directory(path->buf)) | |
384 | ret = 1; | |
385 | if (gitfile_error == READ_GITFILE_ERR_OPEN_FAILED || | |
386 | gitfile_error == READ_GITFILE_ERR_READ_FAILED) | |
387 | ret = 1; | |
388 | strbuf_setlen(path, orig_path_len); | |
389 | return ret; | |
390 | } | |
391 | ||
68025633 JS |
392 | int is_inside_git_dir(void) |
393 | { | |
e90fdc39 JS |
394 | if (inside_git_dir < 0) |
395 | inside_git_dir = is_inside_dir(get_git_dir()); | |
396 | return inside_git_dir; | |
892c41b9 ML |
397 | } |
398 | ||
892c41b9 ML |
399 | int is_inside_work_tree(void) |
400 | { | |
e90fdc39 JS |
401 | if (inside_work_tree < 0) |
402 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
403 | return inside_work_tree; | |
892c41b9 ML |
404 | } |
405 | ||
f3fa1838 JH |
406 | void setup_work_tree(void) |
407 | { | |
8500e0de | 408 | const char *work_tree; |
354e6534 JS |
409 | static int initialized = 0; |
410 | ||
411 | if (initialized) | |
412 | return; | |
fada7674 JK |
413 | |
414 | if (work_tree_config_is_bogus) | |
fc045fe7 | 415 | die(_("unable to set up work tree using invalid config")); |
fada7674 | 416 | |
354e6534 | 417 | work_tree = get_git_work_tree(); |
8500e0de | 418 | if (!work_tree || chdir_notify(work_tree)) |
fc045fe7 | 419 | die(_("this operation must be run in a work tree")); |
0ed74813 NTND |
420 | |
421 | /* | |
422 | * Make sure subsequent git processes find correct worktree | |
423 | * if $GIT_WORK_TREE is set relative | |
424 | */ | |
425 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
426 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
427 | ||
354e6534 | 428 | initialized = 1; |
59f0f2f3 MH |
429 | } |
430 | ||
58b284a2 NTND |
431 | static int read_worktree_config(const char *var, const char *value, void *vdata) |
432 | { | |
433 | struct repository_format *data = vdata; | |
434 | ||
435 | if (strcmp(var, "core.bare") == 0) { | |
436 | data->is_bare = git_config_bool(var, value); | |
437 | } else if (strcmp(var, "core.worktree") == 0) { | |
438 | if (!value) | |
439 | return config_error_nonbool(var); | |
13019979 | 440 | free(data->work_tree); |
58b284a2 NTND |
441 | data->work_tree = xstrdup(value); |
442 | } | |
443 | return 0; | |
444 | } | |
445 | ||
2cc7c2c7 | 446 | static int check_repo_format(const char *var, const char *value, void *vdata) |
31e26ebc | 447 | { |
2cc7c2c7 | 448 | struct repository_format *data = vdata; |
00a09d57 JK |
449 | const char *ext; |
450 | ||
31e26ebc | 451 | if (strcmp(var, "core.repositoryformatversion") == 0) |
2cc7c2c7 | 452 | data->version = git_config_int(var, value); |
00a09d57 JK |
453 | else if (skip_prefix(var, "extensions.", &ext)) { |
454 | /* | |
455 | * record any known extensions here; otherwise, | |
456 | * we fall through to recording it as unknown, and | |
457 | * check_repository_format will complain | |
458 | */ | |
459 | if (!strcmp(ext, "noop")) | |
460 | ; | |
067fbd41 | 461 | else if (!strcmp(ext, "preciousobjects")) |
2cc7c2c7 | 462 | data->precious_objects = git_config_bool(var, value); |
75b97fec JT |
463 | else if (!strcmp(ext, "partialclone")) { |
464 | if (!value) | |
465 | return config_error_nonbool(var); | |
466 | data->partial_clone = xstrdup(value); | |
58b284a2 NTND |
467 | } else if (!strcmp(ext, "worktreeconfig")) |
468 | data->worktree_config = git_config_bool(var, value); | |
469 | else | |
2cc7c2c7 | 470 | string_list_append(&data->unknown_extensions, ext); |
00a09d57 | 471 | } |
58b284a2 NTND |
472 | |
473 | return read_worktree_config(var, value, vdata); | |
31e26ebc NTND |
474 | } |
475 | ||
abade65b | 476 | static int check_repository_format_gently(const char *gitdir, struct repository_format *candidate, int *nongit_ok) |
9459aa77 | 477 | { |
7d0fb0da | 478 | struct strbuf sb = STRBUF_INIT; |
2cc7c2c7 | 479 | struct strbuf err = STRBUF_INIT; |
652f18ee | 480 | int has_common; |
00a09d57 | 481 | |
652f18ee | 482 | has_common = get_common_dir(&sb, gitdir); |
e61a509a | 483 | strbuf_addstr(&sb, "/config"); |
abade65b | 484 | read_repository_format(candidate, sb.buf); |
2cc7c2c7 | 485 | strbuf_release(&sb); |
e61a509a | 486 | |
337e51ce | 487 | /* |
2cc7c2c7 JK |
488 | * For historical use of check_repository_format() in git-init, |
489 | * we treat a missing config as a silent "ok", even when nongit_ok | |
490 | * is unset. | |
337e51ce | 491 | */ |
abade65b | 492 | if (candidate->version < 0) |
2cc7c2c7 JK |
493 | return 0; |
494 | ||
abade65b | 495 | if (verify_repository_format(candidate, &err) < 0) { |
2cc7c2c7 JK |
496 | if (nongit_ok) { |
497 | warning("%s", err.buf); | |
498 | strbuf_release(&err); | |
499 | *nongit_ok = -1; | |
500 | return -1; | |
501 | } | |
502 | die("%s", err.buf); | |
503 | } | |
504 | ||
abade65b | 505 | repository_format_precious_objects = candidate->precious_objects; |
60b7a92d | 506 | set_repository_format_partial_clone(candidate->partial_clone); |
58b284a2 | 507 | repository_format_worktree_config = candidate->worktree_config; |
abade65b | 508 | string_list_clear(&candidate->unknown_extensions, 0); |
58b284a2 NTND |
509 | |
510 | if (repository_format_worktree_config) { | |
511 | /* | |
512 | * pick up core.bare and core.worktree from per-worktree | |
513 | * config if present | |
514 | */ | |
515 | strbuf_addf(&sb, "%s/config.worktree", gitdir); | |
516 | git_config_from_file(read_worktree_config, sb.buf, candidate); | |
517 | strbuf_release(&sb); | |
518 | has_common = 0; | |
519 | } | |
520 | ||
652f18ee | 521 | if (!has_common) { |
abade65b | 522 | if (candidate->is_bare != -1) { |
523 | is_bare_repository_cfg = candidate->is_bare; | |
652f18ee JK |
524 | if (is_bare_repository_cfg == 1) |
525 | inside_work_tree = -1; | |
526 | } | |
abade65b | 527 | if (candidate->work_tree) { |
652f18ee | 528 | free(git_work_tree_cfg); |
e8805af1 | 529 | git_work_tree_cfg = xstrdup(candidate->work_tree); |
2cc7c2c7 | 530 | inside_work_tree = -1; |
652f18ee | 531 | } |
2cc7c2c7 JK |
532 | } |
533 | ||
534 | return 0; | |
535 | } | |
536 | ||
e8805af1 MÅ |
537 | static void init_repository_format(struct repository_format *format) |
538 | { | |
539 | const struct repository_format fresh = REPOSITORY_FORMAT_INIT; | |
540 | ||
541 | memcpy(format, &fresh, sizeof(fresh)); | |
542 | } | |
543 | ||
652f18ee | 544 | int read_repository_format(struct repository_format *format, const char *path) |
2cc7c2c7 | 545 | { |
e8805af1 | 546 | clear_repository_format(format); |
652f18ee | 547 | git_config_from_file(check_repo_format, path, format); |
e8805af1 MÅ |
548 | if (format->version == -1) |
549 | clear_repository_format(format); | |
2cc7c2c7 JK |
550 | return format->version; |
551 | } | |
552 | ||
e8805af1 MÅ |
553 | void clear_repository_format(struct repository_format *format) |
554 | { | |
555 | string_list_clear(&format->unknown_extensions, 0); | |
556 | free(format->work_tree); | |
557 | free(format->partial_clone); | |
558 | init_repository_format(format); | |
559 | } | |
560 | ||
2cc7c2c7 JK |
561 | int verify_repository_format(const struct repository_format *format, |
562 | struct strbuf *err) | |
563 | { | |
564 | if (GIT_REPO_VERSION_READ < format->version) { | |
274db840 | 565 | strbuf_addf(err, _("Expected git repo version <= %d, found %d"), |
2cc7c2c7 JK |
566 | GIT_REPO_VERSION_READ, format->version); |
567 | return -1; | |
568 | } | |
569 | ||
570 | if (format->version >= 1 && format->unknown_extensions.nr) { | |
00a09d57 JK |
571 | int i; |
572 | ||
274db840 | 573 | strbuf_addstr(err, _("unknown repository extensions found:")); |
00a09d57 | 574 | |
2cc7c2c7 JK |
575 | for (i = 0; i < format->unknown_extensions.nr; i++) |
576 | strbuf_addf(err, "\n\t%s", | |
577 | format->unknown_extensions.items[i].string); | |
578 | return -1; | |
00a09d57 JK |
579 | } |
580 | ||
2cc7c2c7 | 581 | return 0; |
9459aa77 NTND |
582 | } |
583 | ||
5f29433f SB |
584 | void read_gitfile_error_die(int error_code, const char *path, const char *dir) |
585 | { | |
586 | switch (error_code) { | |
587 | case READ_GITFILE_ERR_STAT_FAILED: | |
588 | case READ_GITFILE_ERR_NOT_A_FILE: | |
589 | /* non-fatal; follow return path */ | |
590 | break; | |
591 | case READ_GITFILE_ERR_OPEN_FAILED: | |
fc045fe7 | 592 | die_errno(_("error opening '%s'"), path); |
5f29433f | 593 | case READ_GITFILE_ERR_TOO_LARGE: |
fc045fe7 | 594 | die(_("too large to be a .git file: '%s'"), path); |
5f29433f | 595 | case READ_GITFILE_ERR_READ_FAILED: |
fc045fe7 | 596 | die(_("error reading %s"), path); |
5f29433f | 597 | case READ_GITFILE_ERR_INVALID_FORMAT: |
fc045fe7 | 598 | die(_("invalid gitfile format: %s"), path); |
5f29433f | 599 | case READ_GITFILE_ERR_NO_PATH: |
fc045fe7 | 600 | die(_("no path in gitfile: %s"), path); |
5f29433f | 601 | case READ_GITFILE_ERR_NOT_A_REPO: |
fc045fe7 | 602 | die(_("not a git repository: %s"), dir); |
5f29433f | 603 | default: |
033abf97 | 604 | BUG("unknown error code"); |
5f29433f SB |
605 | } |
606 | } | |
607 | ||
b44ebb19 LH |
608 | /* |
609 | * Try to read the location of the git directory from the .git file, | |
ea1d8756 HWN |
610 | * return path to git directory if found. The return value comes from |
611 | * a shared buffer. | |
a93bedad EE |
612 | * |
613 | * On failure, if return_error_code is not NULL, return_error_code | |
614 | * will be set to an error code and NULL will be returned. If | |
615 | * return_error_code is NULL the function will die instead (for most | |
616 | * cases). | |
b44ebb19 | 617 | */ |
a93bedad | 618 | const char *read_gitfile_gently(const char *path, int *return_error_code) |
b44ebb19 | 619 | { |
921bdd96 | 620 | const int max_file_size = 1 << 20; /* 1MB */ |
a93bedad EE |
621 | int error_code = 0; |
622 | char *buf = NULL; | |
623 | char *dir = NULL; | |
40c813e0 | 624 | const char *slash; |
b44ebb19 LH |
625 | struct stat st; |
626 | int fd; | |
b1905aea | 627 | ssize_t len; |
3d7747e3 | 628 | static struct strbuf realpath = STRBUF_INIT; |
b44ebb19 | 629 | |
a93bedad | 630 | if (stat(path, &st)) { |
5c4003ca | 631 | /* NEEDSWORK: discern between ENOENT vs other errors */ |
a93bedad EE |
632 | error_code = READ_GITFILE_ERR_STAT_FAILED; |
633 | goto cleanup_return; | |
634 | } | |
635 | if (!S_ISREG(st.st_mode)) { | |
636 | error_code = READ_GITFILE_ERR_NOT_A_FILE; | |
637 | goto cleanup_return; | |
638 | } | |
921bdd96 EE |
639 | if (st.st_size > max_file_size) { |
640 | error_code = READ_GITFILE_ERR_TOO_LARGE; | |
641 | goto cleanup_return; | |
642 | } | |
b44ebb19 | 643 | fd = open(path, O_RDONLY); |
a93bedad EE |
644 | if (fd < 0) { |
645 | error_code = READ_GITFILE_ERR_OPEN_FAILED; | |
646 | goto cleanup_return; | |
647 | } | |
3733e694 | 648 | buf = xmallocz(st.st_size); |
b44ebb19 LH |
649 | len = read_in_full(fd, buf, st.st_size); |
650 | close(fd); | |
a93bedad EE |
651 | if (len != st.st_size) { |
652 | error_code = READ_GITFILE_ERR_READ_FAILED; | |
653 | goto cleanup_return; | |
654 | } | |
a93bedad EE |
655 | if (!starts_with(buf, "gitdir: ")) { |
656 | error_code = READ_GITFILE_ERR_INVALID_FORMAT; | |
657 | goto cleanup_return; | |
658 | } | |
b44ebb19 LH |
659 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') |
660 | len--; | |
a93bedad EE |
661 | if (len < 9) { |
662 | error_code = READ_GITFILE_ERR_NO_PATH; | |
663 | goto cleanup_return; | |
664 | } | |
b44ebb19 | 665 | buf[len] = '\0'; |
40c813e0 BK |
666 | dir = buf + 8; |
667 | ||
668 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
669 | size_t pathlen = slash+1 - path; | |
75faa45a JK |
670 | dir = xstrfmt("%.*s%.*s", (int)pathlen, path, |
671 | (int)(len - 8), buf + 8); | |
40c813e0 BK |
672 | free(buf); |
673 | buf = dir; | |
674 | } | |
a93bedad EE |
675 | if (!is_git_directory(dir)) { |
676 | error_code = READ_GITFILE_ERR_NOT_A_REPO; | |
677 | goto cleanup_return; | |
678 | } | |
3d7747e3 AM |
679 | |
680 | strbuf_realpath(&realpath, dir, 1); | |
681 | path = realpath.buf; | |
40c813e0 | 682 | |
a93bedad | 683 | cleanup_return: |
a93bedad EE |
684 | if (return_error_code) |
685 | *return_error_code = error_code; | |
5f29433f SB |
686 | else if (error_code) |
687 | read_gitfile_error_die(error_code, path, dir); | |
a93bedad | 688 | |
b44ebb19 | 689 | free(buf); |
38ae8784 | 690 | return error_code ? NULL : path; |
b44ebb19 LH |
691 | } |
692 | ||
e4e30347 | 693 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
7333ed17 | 694 | struct strbuf *cwd, |
abade65b | 695 | struct repository_format *repo_fmt, |
b3f66fd3 | 696 | int *nongit_ok) |
e4e30347 | 697 | { |
b3f66fd3 NTND |
698 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
699 | const char *worktree; | |
700 | char *gitfile; | |
9b125da4 | 701 | int offset; |
e4e30347 JN |
702 | |
703 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
fc045fe7 | 704 | die(_("'$%s' too big"), GIT_DIR_ENVIRONMENT); |
b3f66fd3 | 705 | |
13d6ec91 | 706 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
707 | if (gitfile) { |
708 | gitfile = xstrdup(gitfile); | |
709 | gitdirenv = gitfile; | |
710 | } | |
711 | ||
e4e30347 JN |
712 | if (!is_git_directory(gitdirenv)) { |
713 | if (nongit_ok) { | |
714 | *nongit_ok = 1; | |
b3f66fd3 | 715 | free(gitfile); |
e4e30347 JN |
716 | return NULL; |
717 | } | |
fc045fe7 | 718 | die(_("not a git repository: '%s'"), gitdirenv); |
e4e30347 | 719 | } |
b3f66fd3 | 720 | |
abade65b | 721 | if (check_repository_format_gently(gitdirenv, repo_fmt, nongit_ok)) { |
b3f66fd3 NTND |
722 | free(gitfile); |
723 | return NULL; | |
e4e30347 | 724 | } |
b3f66fd3 NTND |
725 | |
726 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
727 | if (work_tree_env) | |
728 | set_git_work_tree(work_tree_env); | |
729 | else if (is_bare_repository_cfg > 0) { | |
fada7674 JK |
730 | if (git_work_tree_cfg) { |
731 | /* #22.2, #30 */ | |
732 | warning("core.bare and core.worktree do not make sense"); | |
733 | work_tree_config_is_bogus = 1; | |
734 | } | |
b3f66fd3 NTND |
735 | |
736 | /* #18, #26 */ | |
0915a5b4 | 737 | set_git_dir(gitdirenv, 0); |
b3f66fd3 | 738 | free(gitfile); |
e4e30347 | 739 | return NULL; |
b3f66fd3 NTND |
740 | } |
741 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
742 | if (is_absolute_path(git_work_tree_cfg)) | |
743 | set_git_work_tree(git_work_tree_cfg); | |
744 | else { | |
56b9f6e7 | 745 | char *core_worktree; |
b3f66fd3 | 746 | if (chdir(gitdirenv)) |
fc045fe7 | 747 | die_errno(_("cannot chdir to '%s'"), gitdirenv); |
b3f66fd3 | 748 | if (chdir(git_work_tree_cfg)) |
fc045fe7 | 749 | die_errno(_("cannot chdir to '%s'"), git_work_tree_cfg); |
56b9f6e7 | 750 | core_worktree = xgetcwd(); |
7333ed17 | 751 | if (chdir(cwd->buf)) |
fc045fe7 | 752 | die_errno(_("cannot come back to cwd")); |
b3f66fd3 | 753 | set_git_work_tree(core_worktree); |
56b9f6e7 | 754 | free(core_worktree); |
b3f66fd3 NTND |
755 | } |
756 | } | |
2cd83d10 JK |
757 | else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) { |
758 | /* #16d */ | |
0915a5b4 | 759 | set_git_dir(gitdirenv, 0); |
2cd83d10 JK |
760 | free(gitfile); |
761 | return NULL; | |
762 | } | |
b3f66fd3 NTND |
763 | else /* #2, #10 */ |
764 | set_git_work_tree("."); | |
765 | ||
766 | /* set_git_work_tree() must have been called by now */ | |
767 | worktree = get_git_work_tree(); | |
768 | ||
769 | /* both get_git_work_tree() and cwd are already normalized */ | |
7333ed17 | 770 | if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */ |
0915a5b4 | 771 | set_git_dir(gitdirenv, 0); |
b3f66fd3 | 772 | free(gitfile); |
e4e30347 | 773 | return NULL; |
b3f66fd3 | 774 | } |
e4e30347 | 775 | |
7333ed17 | 776 | offset = dir_inside_of(cwd->buf, worktree); |
9b125da4 | 777 | if (offset >= 0) { /* cwd inside worktree? */ |
0915a5b4 | 778 | set_git_dir(gitdirenv, 1); |
b3f66fd3 | 779 | if (chdir(worktree)) |
fc045fe7 | 780 | die_errno(_("cannot chdir to '%s'"), worktree); |
7333ed17 | 781 | strbuf_addch(cwd, '/'); |
b3f66fd3 | 782 | free(gitfile); |
7333ed17 | 783 | return cwd->buf + offset; |
93a00542 | 784 | } |
b3f66fd3 NTND |
785 | |
786 | /* cwd outside worktree */ | |
0915a5b4 | 787 | set_git_dir(gitdirenv, 0); |
b3f66fd3 NTND |
788 | free(gitfile); |
789 | return NULL; | |
93a00542 JN |
790 | } |
791 | ||
9951d3b3 | 792 | static const char *setup_discovered_git_dir(const char *gitdir, |
7333ed17 | 793 | struct strbuf *cwd, int offset, |
abade65b | 794 | struct repository_format *repo_fmt, |
9951d3b3 | 795 | int *nongit_ok) |
98937bef | 796 | { |
abade65b | 797 | if (check_repository_format_gently(gitdir, repo_fmt, nongit_ok)) |
9951d3b3 | 798 | return NULL; |
98937bef | 799 | |
4868b2ea JN |
800 | /* --work-tree is set without --git-dir; use discovered one */ |
801 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
2d4dcf21 JS |
802 | char *to_free = NULL; |
803 | const char *ret; | |
804 | ||
7333ed17 | 805 | if (offset != cwd->len && !is_absolute_path(gitdir)) |
2d4dcf21 | 806 | gitdir = to_free = real_pathdup(gitdir, 1); |
7333ed17 | 807 | if (chdir(cwd->buf)) |
fc045fe7 | 808 | die_errno(_("cannot come back to cwd")); |
abade65b | 809 | ret = setup_explicit_git_dir(gitdir, cwd, repo_fmt, nongit_ok); |
2d4dcf21 JS |
810 | free(to_free); |
811 | return ret; | |
4868b2ea JN |
812 | } |
813 | ||
9951d3b3 NTND |
814 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
815 | if (is_bare_repository_cfg > 0) { | |
0915a5b4 | 816 | set_git_dir(gitdir, (offset != cwd->len)); |
7333ed17 | 817 | if (chdir(cwd->buf)) |
fc045fe7 | 818 | die_errno(_("cannot come back to cwd")); |
98937bef | 819 | return NULL; |
9951d3b3 | 820 | } |
98937bef | 821 | |
9951d3b3 NTND |
822 | /* #0, #1, #5, #8, #9, #12, #13 */ |
823 | set_git_work_tree("."); | |
824 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
0915a5b4 | 825 | set_git_dir(gitdir, 0); |
98937bef | 826 | inside_git_dir = 0; |
9951d3b3 | 827 | inside_work_tree = 1; |
5cf7b3b1 | 828 | if (offset >= cwd->len) |
98937bef NTND |
829 | return NULL; |
830 | ||
df380d58 JS |
831 | /* Make "offset" point past the '/' (already the case for root dirs) */ |
832 | if (offset != offset_1st_component(cwd->buf)) | |
833 | offset++; | |
834 | /* Add a '/' at the end */ | |
7333ed17 RS |
835 | strbuf_addch(cwd, '/'); |
836 | return cwd->buf + offset; | |
98937bef NTND |
837 | } |
838 | ||
1cd8031b | 839 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
7333ed17 | 840 | static const char *setup_bare_git_dir(struct strbuf *cwd, int offset, |
abade65b | 841 | struct repository_format *repo_fmt, |
7333ed17 | 842 | int *nongit_ok) |
68698da5 JN |
843 | { |
844 | int root_len; | |
845 | ||
abade65b | 846 | if (check_repository_format_gently(".", repo_fmt, nongit_ok)) |
1cd8031b NTND |
847 | return NULL; |
848 | ||
2cd83d10 JK |
849 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
850 | ||
4868b2ea JN |
851 | /* --work-tree is set without --git-dir; use discovered one */ |
852 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
da6f8475 | 853 | static const char *gitdir; |
4868b2ea | 854 | |
7333ed17 RS |
855 | gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset); |
856 | if (chdir(cwd->buf)) | |
fc045fe7 | 857 | die_errno(_("cannot come back to cwd")); |
abade65b | 858 | return setup_explicit_git_dir(gitdir, cwd, repo_fmt, nongit_ok); |
4868b2ea JN |
859 | } |
860 | ||
68698da5 | 861 | inside_git_dir = 1; |
1cd8031b | 862 | inside_work_tree = 0; |
7333ed17 RS |
863 | if (offset != cwd->len) { |
864 | if (chdir(cwd->buf)) | |
fc045fe7 | 865 | die_errno(_("cannot come back to cwd")); |
7333ed17 RS |
866 | root_len = offset_1st_component(cwd->buf); |
867 | strbuf_setlen(cwd, offset > root_len ? offset : root_len); | |
0915a5b4 | 868 | set_git_dir(cwd->buf, 0); |
337e51ce | 869 | } |
1cd8031b | 870 | else |
0915a5b4 | 871 | set_git_dir(".", 0); |
68698da5 JN |
872 | return NULL; |
873 | } | |
874 | ||
2565b43b | 875 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
60c98d1e JN |
876 | { |
877 | struct stat buf; | |
2565b43b | 878 | if (stat(path, &buf)) { |
fc045fe7 | 879 | die_errno(_("failed to stat '%*s%s%s'"), |
2565b43b | 880 | prefix_len, |
60c98d1e JN |
881 | prefix ? prefix : "", |
882 | prefix ? "/" : "", path); | |
2565b43b | 883 | } |
60c98d1e JN |
884 | return buf.st_dev; |
885 | } | |
886 | ||
9e2326c7 | 887 | /* |
1b77d83c MH |
888 | * A "string_list_each_func_t" function that canonicalizes an entry |
889 | * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or | |
7ec30aaa MH |
890 | * discards it if unusable. The presence of an empty entry in |
891 | * GIT_CEILING_DIRECTORIES turns off canonicalization for all | |
892 | * subsequent entries. | |
9e2326c7 | 893 | */ |
1b77d83c | 894 | static int canonicalize_ceiling_entry(struct string_list_item *item, |
7ec30aaa | 895 | void *cb_data) |
9e2326c7 | 896 | { |
7ec30aaa | 897 | int *empty_entry_found = cb_data; |
1b77d83c | 898 | char *ceil = item->string; |
9e2326c7 | 899 | |
7ec30aaa MH |
900 | if (!*ceil) { |
901 | *empty_entry_found = 1; | |
9e2326c7 | 902 | return 0; |
7ec30aaa | 903 | } else if (!is_absolute_path(ceil)) { |
9e2326c7 | 904 | return 0; |
7ec30aaa MH |
905 | } else if (*empty_entry_found) { |
906 | /* Keep entry but do not canonicalize it */ | |
907 | return 1; | |
908 | } else { | |
ce83eadd | 909 | char *real_path = real_pathdup(ceil, 0); |
4ac9006f | 910 | if (!real_path) { |
7ec30aaa | 911 | return 0; |
4ac9006f | 912 | } |
7ec30aaa | 913 | free(item->string); |
4ac9006f | 914 | item->string = real_path; |
7ec30aaa MH |
915 | return 1; |
916 | } | |
9e2326c7 MH |
917 | } |
918 | ||
ce9b8aab JS |
919 | enum discovery_result { |
920 | GIT_DIR_NONE = 0, | |
921 | GIT_DIR_EXPLICIT, | |
922 | GIT_DIR_DISCOVERED, | |
923 | GIT_DIR_BARE, | |
924 | /* these are errors */ | |
925 | GIT_DIR_HIT_CEILING = -1, | |
01017dce JS |
926 | GIT_DIR_HIT_MOUNT_POINT = -2, |
927 | GIT_DIR_INVALID_GITFILE = -3 | |
ce9b8aab JS |
928 | }; |
929 | ||
e90fdc39 JS |
930 | /* |
931 | * We cannot decide in this function whether we are in the work tree or | |
932 | * not, since the config can only be read _after_ this function was called. | |
ce9b8aab JS |
933 | * |
934 | * Also, we avoid changing any global state (such as the current working | |
935 | * directory) to allow early callers. | |
936 | * | |
937 | * The directory where the search should start needs to be passed in via the | |
938 | * `dir` parameter; upon return, the `dir` buffer will contain the path of | |
939 | * the directory where the search ended, and `gitdir` will contain the path of | |
940 | * the discovered .git/ directory, if any. If `gitdir` is not absolute, it | |
941 | * is relative to `dir` (i.e. *not* necessarily the cwd). | |
e90fdc39 | 942 | */ |
ce9b8aab | 943 | static enum discovery_result setup_git_directory_gently_1(struct strbuf *dir, |
01017dce JS |
944 | struct strbuf *gitdir, |
945 | int die_on_error) | |
d288a700 | 946 | { |
0454dd93 | 947 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
31171d9e | 948 | struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; |
ce9b8aab | 949 | const char *gitdirenv; |
d17f2124 | 950 | int ceil_offset = -1, min_offset = offset_1st_component(dir->buf); |
c7d1d1b1 RH |
951 | dev_t current_device = 0; |
952 | int one_filesystem = 1; | |
d288a700 | 953 | |
e90fdc39 JS |
954 | /* |
955 | * If GIT_DIR is set explicitly, we're not going | |
956 | * to do any discovery, but we still do repository | |
957 | * validation. | |
958 | */ | |
ad1a382f | 959 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
ce9b8aab JS |
960 | if (gitdirenv) { |
961 | strbuf_addstr(gitdir, gitdirenv); | |
962 | return GIT_DIR_EXPLICIT; | |
963 | } | |
d288a700 | 964 | |
31171d9e | 965 | if (env_ceiling_dirs) { |
7ec30aaa MH |
966 | int empty_entry_found = 0; |
967 | ||
31171d9e | 968 | string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); |
1b77d83c | 969 | filter_string_list(&ceiling_dirs, 0, |
7ec30aaa | 970 | canonicalize_ceiling_entry, &empty_entry_found); |
ce9b8aab | 971 | ceil_offset = longest_ancestor_length(dir->buf, &ceiling_dirs); |
31171d9e MH |
972 | string_list_clear(&ceiling_dirs, 0); |
973 | } | |
974 | ||
ce9b8aab JS |
975 | if (ceil_offset < 0) |
976 | ceil_offset = min_offset - 2; | |
d288a700 | 977 | |
e2683d51 JS |
978 | if (min_offset && min_offset == dir->len && |
979 | !is_dir_sep(dir->buf[min_offset - 1])) { | |
980 | strbuf_addch(dir, '/'); | |
981 | min_offset++; | |
982 | } | |
983 | ||
892c41b9 | 984 | /* |
ce9b8aab | 985 | * Test in the following order (relative to the dir): |
b44ebb19 | 986 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
987 | * - .git/ |
988 | * - ./ (bare) | |
b44ebb19 | 989 | * - ../.git |
e90fdc39 JS |
990 | * - ../.git/ |
991 | * - ../ (bare) | |
176b2d32 | 992 | * - ../../.git |
e90fdc39 | 993 | * etc. |
892c41b9 | 994 | */ |
cf87463e | 995 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e | 996 | if (one_filesystem) |
ce9b8aab | 997 | current_device = get_device_or_die(dir->buf, NULL, 0); |
e90fdc39 | 998 | for (;;) { |
01017dce | 999 | int offset = dir->len, error_code = 0; |
ce9b8aab JS |
1000 | |
1001 | if (offset > min_offset) | |
1002 | strbuf_addch(dir, '/'); | |
1003 | strbuf_addstr(dir, DEFAULT_GIT_DIR_ENVIRONMENT); | |
01017dce JS |
1004 | gitdirenv = read_gitfile_gently(dir->buf, die_on_error ? |
1005 | NULL : &error_code); | |
1006 | if (!gitdirenv) { | |
1007 | if (die_on_error || | |
1008 | error_code == READ_GITFILE_ERR_NOT_A_FILE) { | |
5c4003ca | 1009 | /* NEEDSWORK: fail if .git is not file nor dir */ |
01017dce JS |
1010 | if (is_git_directory(dir->buf)) |
1011 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
1012 | } else if (error_code != READ_GITFILE_ERR_STAT_FAILED) | |
1013 | return GIT_DIR_INVALID_GITFILE; | |
9951d3b3 | 1014 | } |
ce9b8aab | 1015 | strbuf_setlen(dir, offset); |
9951d3b3 | 1016 | if (gitdirenv) { |
ce9b8aab JS |
1017 | strbuf_addstr(gitdir, gitdirenv); |
1018 | return GIT_DIR_DISCOVERED; | |
9951d3b3 | 1019 | } |
9951d3b3 | 1020 | |
ce9b8aab JS |
1021 | if (is_git_directory(dir->buf)) { |
1022 | strbuf_addstr(gitdir, "."); | |
1023 | return GIT_DIR_BARE; | |
502ffe34 | 1024 | } |
9951d3b3 | 1025 | |
ce9b8aab JS |
1026 | if (offset <= min_offset) |
1027 | return GIT_DIR_HIT_CEILING; | |
1cd8031b | 1028 | |
ce9b8aab | 1029 | while (--offset > ceil_offset && !is_dir_sep(dir->buf[offset])) |
6c1e6544 | 1030 | ; /* continue */ |
ce9b8aab JS |
1031 | if (offset <= ceil_offset) |
1032 | return GIT_DIR_HIT_CEILING; | |
1033 | ||
1034 | strbuf_setlen(dir, offset > min_offset ? offset : min_offset); | |
1035 | if (one_filesystem && | |
1036 | current_device != get_device_or_die(dir->buf, NULL, offset)) | |
1037 | return GIT_DIR_HIT_MOUNT_POINT; | |
892c41b9 | 1038 | } |
d288a700 | 1039 | } |
5e7bfe25 | 1040 | |
d3fb71b3 BW |
1041 | int discover_git_directory(struct strbuf *commondir, |
1042 | struct strbuf *gitdir) | |
16ac8b8d JS |
1043 | { |
1044 | struct strbuf dir = STRBUF_INIT, err = STRBUF_INIT; | |
1045 | size_t gitdir_offset = gitdir->len, cwd_len; | |
d3fb71b3 | 1046 | size_t commondir_offset = commondir->len; |
e8805af1 | 1047 | struct repository_format candidate = REPOSITORY_FORMAT_INIT; |
16ac8b8d JS |
1048 | |
1049 | if (strbuf_getcwd(&dir)) | |
d3fb71b3 | 1050 | return -1; |
16ac8b8d JS |
1051 | |
1052 | cwd_len = dir.len; | |
01017dce | 1053 | if (setup_git_directory_gently_1(&dir, gitdir, 0) <= 0) { |
16ac8b8d | 1054 | strbuf_release(&dir); |
d3fb71b3 | 1055 | return -1; |
16ac8b8d JS |
1056 | } |
1057 | ||
1058 | /* | |
1059 | * The returned gitdir is relative to dir, and if dir does not reflect | |
1060 | * the current working directory, we simply make the gitdir absolute. | |
1061 | */ | |
1062 | if (dir.len < cwd_len && !is_absolute_path(gitdir->buf + gitdir_offset)) { | |
1063 | /* Avoid a trailing "/." */ | |
1064 | if (!strcmp(".", gitdir->buf + gitdir_offset)) | |
1065 | strbuf_setlen(gitdir, gitdir_offset); | |
1066 | else | |
1067 | strbuf_addch(&dir, '/'); | |
1068 | strbuf_insert(gitdir, gitdir_offset, dir.buf, dir.len); | |
1069 | } | |
1070 | ||
d3fb71b3 BW |
1071 | get_common_dir(commondir, gitdir->buf + gitdir_offset); |
1072 | ||
16ac8b8d | 1073 | strbuf_reset(&dir); |
d3fb71b3 | 1074 | strbuf_addf(&dir, "%s/config", commondir->buf + commondir_offset); |
16ac8b8d JS |
1075 | read_repository_format(&candidate, dir.buf); |
1076 | strbuf_release(&dir); | |
1077 | ||
1078 | if (verify_repository_format(&candidate, &err) < 0) { | |
1079 | warning("ignoring git dir '%s': %s", | |
1080 | gitdir->buf + gitdir_offset, err.buf); | |
1081 | strbuf_release(&err); | |
d3fb71b3 | 1082 | strbuf_setlen(commondir, commondir_offset); |
69743f9b | 1083 | strbuf_setlen(gitdir, gitdir_offset); |
e8805af1 | 1084 | clear_repository_format(&candidate); |
d3fb71b3 | 1085 | return -1; |
16ac8b8d JS |
1086 | } |
1087 | ||
e8805af1 | 1088 | clear_repository_format(&candidate); |
d3fb71b3 | 1089 | return 0; |
16ac8b8d JS |
1090 | } |
1091 | ||
a60645f9 NTND |
1092 | const char *setup_git_directory_gently(int *nongit_ok) |
1093 | { | |
ce9b8aab JS |
1094 | static struct strbuf cwd = STRBUF_INIT; |
1095 | struct strbuf dir = STRBUF_INIT, gitdir = STRBUF_INIT; | |
07098b81 | 1096 | const char *prefix = NULL; |
e8805af1 | 1097 | struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT; |
a60645f9 | 1098 | |
ce9b8aab JS |
1099 | /* |
1100 | * We may have read an incomplete configuration before | |
1101 | * setting-up the git directory. If so, clear the cache so | |
1102 | * that the next queries to the configuration reload complete | |
1103 | * configuration (including the per-repo config file that we | |
1104 | * ignored previously). | |
1105 | */ | |
1106 | git_config_clear(); | |
1107 | ||
1108 | /* | |
1109 | * Let's assume that we are in a git repository. | |
1110 | * If it turns out later that we are somewhere else, the value will be | |
1111 | * updated accordingly. | |
1112 | */ | |
1113 | if (nongit_ok) | |
1114 | *nongit_ok = 0; | |
1115 | ||
1116 | if (strbuf_getcwd(&cwd)) | |
1117 | die_errno(_("Unable to read current working directory")); | |
1118 | strbuf_addbuf(&dir, &cwd); | |
1119 | ||
01017dce | 1120 | switch (setup_git_directory_gently_1(&dir, &gitdir, 1)) { |
ce9b8aab | 1121 | case GIT_DIR_EXPLICIT: |
abade65b | 1122 | prefix = setup_explicit_git_dir(gitdir.buf, &cwd, &repo_fmt, nongit_ok); |
ce9b8aab JS |
1123 | break; |
1124 | case GIT_DIR_DISCOVERED: | |
1125 | if (dir.len < cwd.len && chdir(dir.buf)) | |
fc045fe7 | 1126 | die(_("cannot change to '%s'"), dir.buf); |
ce9b8aab | 1127 | prefix = setup_discovered_git_dir(gitdir.buf, &cwd, dir.len, |
abade65b | 1128 | &repo_fmt, nongit_ok); |
ce9b8aab JS |
1129 | break; |
1130 | case GIT_DIR_BARE: | |
1131 | if (dir.len < cwd.len && chdir(dir.buf)) | |
fc045fe7 | 1132 | die(_("cannot change to '%s'"), dir.buf); |
abade65b | 1133 | prefix = setup_bare_git_dir(&cwd, dir.len, &repo_fmt, nongit_ok); |
ce9b8aab JS |
1134 | break; |
1135 | case GIT_DIR_HIT_CEILING: | |
07098b81 ED |
1136 | if (!nongit_ok) |
1137 | die(_("not a git repository (or any of the parent directories): %s"), | |
1138 | DEFAULT_GIT_DIR_ENVIRONMENT); | |
1139 | *nongit_ok = 1; | |
ce9b8aab JS |
1140 | break; |
1141 | case GIT_DIR_HIT_MOUNT_POINT: | |
07098b81 ED |
1142 | if (!nongit_ok) |
1143 | die(_("not a git repository (or any parent up to mount point %s)\n" | |
1144 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."), | |
1145 | dir.buf); | |
1146 | *nongit_ok = 1; | |
1147 | break; | |
1148 | case GIT_DIR_NONE: | |
1149 | /* | |
1150 | * As a safeguard against setup_git_directory_gently_1 returning | |
1151 | * this value, fallthrough to BUG. Otherwise it is possible to | |
1152 | * set startup_info->have_repository to 1 when we did nothing to | |
1153 | * find a repository. | |
1154 | */ | |
ce9b8aab | 1155 | default: |
033abf97 | 1156 | BUG("unhandled setup_git_directory_1() result"); |
ce9b8aab JS |
1157 | } |
1158 | ||
07098b81 ED |
1159 | /* |
1160 | * At this point, nongit_ok is stable. If it is non-NULL and points | |
1161 | * to a non-zero value, then this means that we haven't found a | |
1162 | * repository and that the caller expects startup_info to reflect | |
1163 | * this. | |
1164 | * | |
1165 | * Regardless of the state of nongit_ok, startup_info->prefix and | |
1166 | * the GIT_PREFIX environment variable must always match. For details | |
1167 | * see Documentation/config/alias.txt. | |
1168 | */ | |
1169 | if (nongit_ok && *nongit_ok) { | |
1170 | startup_info->have_repository = 0; | |
1171 | startup_info->prefix = NULL; | |
a6f7f9a3 | 1172 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); |
07098b81 ED |
1173 | } else { |
1174 | startup_info->have_repository = 1; | |
1175 | startup_info->prefix = prefix; | |
1176 | if (prefix) | |
1177 | setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1); | |
1178 | else | |
1179 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); | |
1180 | } | |
46c3cd44 | 1181 | |
73f192c9 BW |
1182 | /* |
1183 | * Not all paths through the setup code will call 'set_git_dir()' (which | |
1184 | * directly sets up the environment) so in order to guarantee that the | |
1185 | * environment is in a consistent state after setup, explicitly setup | |
1186 | * the environment if we have a repository. | |
1187 | * | |
1188 | * NEEDSWORK: currently we allow bogus GIT_DIR values to be set in some | |
1189 | * code paths so we also need to explicitly setup the environment if | |
1190 | * the user has set GIT_DIR. It may be beneficial to disallow bogus | |
1191 | * GIT_DIR values at some point in the future. | |
1192 | */ | |
07098b81 ED |
1193 | if (/* GIT_DIR_EXPLICIT, GIT_DIR_DISCOVERED, GIT_DIR_BARE */ |
1194 | startup_info->have_repository || | |
1195 | /* GIT_DIR_EXPLICIT */ | |
1196 | getenv(GIT_DIR_ENVIRONMENT)) { | |
c14c234f BW |
1197 | if (!the_repository->gitdir) { |
1198 | const char *gitdir = getenv(GIT_DIR_ENVIRONMENT); | |
1199 | if (!gitdir) | |
1200 | gitdir = DEFAULT_GIT_DIR_ENVIRONMENT; | |
357a03eb | 1201 | setup_git_env(gitdir); |
c14c234f | 1202 | } |
78a67668 | 1203 | if (startup_info->have_repository) |
1204 | repo_set_hash_algo(the_repository, repo_fmt.hash_algo); | |
c14c234f | 1205 | } |
73f192c9 | 1206 | |
ce9b8aab JS |
1207 | strbuf_release(&dir); |
1208 | strbuf_release(&gitdir); | |
e8805af1 | 1209 | clear_repository_format(&repo_fmt); |
ce9b8aab | 1210 | |
a60645f9 NTND |
1211 | return prefix; |
1212 | } | |
1213 | ||
94df2506 JH |
1214 | int git_config_perm(const char *var, const char *value) |
1215 | { | |
06cbe855 HO |
1216 | int i; |
1217 | char *endptr; | |
1218 | ||
1219 | if (value == NULL) | |
1220 | return PERM_GROUP; | |
1221 | ||
1222 | if (!strcmp(value, "umask")) | |
1223 | return PERM_UMASK; | |
1224 | if (!strcmp(value, "group")) | |
1225 | return PERM_GROUP; | |
1226 | if (!strcmp(value, "all") || | |
1227 | !strcmp(value, "world") || | |
1228 | !strcmp(value, "everybody")) | |
1229 | return PERM_EVERYBODY; | |
1230 | ||
1231 | /* Parse octal numbers */ | |
1232 | i = strtol(value, &endptr, 8); | |
1233 | ||
1234 | /* If not an octal number, maybe true/false? */ | |
1235 | if (*endptr != 0) | |
1236 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
1237 | ||
1238 | /* | |
1239 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 1240 | * a chmod value to restrict to. |
06cbe855 HO |
1241 | */ |
1242 | switch (i) { | |
1243 | case PERM_UMASK: /* 0 */ | |
1244 | return PERM_UMASK; | |
1245 | case OLD_PERM_GROUP: /* 1 */ | |
1246 | return PERM_GROUP; | |
1247 | case OLD_PERM_EVERYBODY: /* 2 */ | |
1248 | return PERM_EVERYBODY; | |
94df2506 | 1249 | } |
06cbe855 HO |
1250 | |
1251 | /* A filemode value was given: 0xxx */ | |
1252 | ||
1253 | if ((i & 0600) != 0600) | |
fc045fe7 | 1254 | die(_("problem with core.sharedRepository filemode value " |
06cbe855 | 1255 | "(0%.3o).\nThe owner of files must always have " |
2ff30e67 | 1256 | "read and write permissions."), i); |
06cbe855 HO |
1257 | |
1258 | /* | |
1259 | * Mask filemode value. Others can not get write permission. | |
1260 | * x flags for directories are handled separately. | |
1261 | */ | |
5a688fe4 | 1262 | return -(i & 0666); |
94df2506 JH |
1263 | } |
1264 | ||
4b0d1eeb | 1265 | void check_repository_format(void) |
ab9cb76f | 1266 | { |
e8805af1 | 1267 | struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT; |
abade65b | 1268 | check_repository_format_gently(get_git_dir(), &repo_fmt, NULL); |
f1c126bd | 1269 | startup_info->have_repository = 1; |
e8805af1 | 1270 | clear_repository_format(&repo_fmt); |
ab9cb76f JH |
1271 | } |
1272 | ||
e1e5ec86 CB |
1273 | /* |
1274 | * Returns the "prefix", a path to the current working directory | |
1275 | * relative to the work tree root, or NULL, if the current working | |
1276 | * directory is not a strict subdirectory of the work tree root. The | |
1277 | * prefix always ends with a '/' character. | |
1278 | */ | |
5e7bfe25 JH |
1279 | const char *setup_git_directory(void) |
1280 | { | |
b3f66fd3 | 1281 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 1282 | } |
abc06822 | 1283 | |
40d96325 | 1284 | const char *resolve_gitdir_gently(const char *suspect, int *return_error_code) |
abc06822 FG |
1285 | { |
1286 | if (is_git_directory(suspect)) | |
1287 | return suspect; | |
40d96325 | 1288 | return read_gitfile_gently(suspect, return_error_code); |
abc06822 | 1289 | } |
1d999ddd TR |
1290 | |
1291 | /* if any standard file descriptor is missing open it to /dev/null */ | |
1292 | void sanitize_stdfds(void) | |
1293 | { | |
1294 | int fd = open("/dev/null", O_RDWR, 0); | |
1295 | while (fd != -1 && fd < 2) | |
1296 | fd = dup(fd); | |
1297 | if (fd == -1) | |
fc045fe7 | 1298 | die_errno(_("open /dev/null or dup failed")); |
1d999ddd TR |
1299 | if (fd > 2) |
1300 | close(fd); | |
1301 | } | |
de0957ce NTND |
1302 | |
1303 | int daemonize(void) | |
1304 | { | |
1305 | #ifdef NO_POSIX_GOODIES | |
1306 | errno = ENOSYS; | |
1307 | return -1; | |
1308 | #else | |
1309 | switch (fork()) { | |
1310 | case 0: | |
1311 | break; | |
1312 | case -1: | |
fc045fe7 | 1313 | die_errno(_("fork failed")); |
de0957ce NTND |
1314 | default: |
1315 | exit(0); | |
1316 | } | |
1317 | if (setsid() == -1) | |
fc045fe7 | 1318 | die_errno(_("setsid failed")); |
de0957ce NTND |
1319 | close(0); |
1320 | close(1); | |
1321 | close(2); | |
1322 | sanitize_stdfds(); | |
1323 | return 0; | |
1324 | #endif | |
1325 | } |