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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; | |
e6f8861b | 15 | const char *tmp_original_cwd; |
46c3cd44 | 16 | |
ddc2a628 MEW |
17 | /* |
18 | * The input parameter must contain an absolute path, and it must already be | |
19 | * normalized. | |
20 | * | |
21 | * Find the part of an absolute path that lies inside the work tree by | |
22 | * dereferencing symlinks outside the work tree, for example: | |
23 | * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file | |
24 | * /dir/file (work tree is /) -> dir/file | |
25 | * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2 | |
26 | * /dir/repolink/file (repolink points to /dir/repo) -> file | |
27 | * /dir/repo (exactly equal to work tree) -> (empty string) | |
28 | */ | |
29 | static int abspath_part_inside_repo(char *path) | |
30 | { | |
31 | size_t len; | |
32 | size_t wtlen; | |
33 | char *path0; | |
34 | int off; | |
35 | const char *work_tree = get_git_work_tree(); | |
3d7747e3 | 36 | struct strbuf realpath = STRBUF_INIT; |
ddc2a628 MEW |
37 | |
38 | if (!work_tree) | |
39 | return -1; | |
40 | wtlen = strlen(work_tree); | |
41 | len = strlen(path); | |
6127ff63 | 42 | off = offset_1st_component(path); |
ddc2a628 MEW |
43 | |
44 | /* check if work tree is already the prefix */ | |
d8727b36 | 45 | if (wtlen <= len && !fspathncmp(path, work_tree, wtlen)) { |
ddc2a628 MEW |
46 | if (path[wtlen] == '/') { |
47 | memmove(path, path + wtlen + 1, len - wtlen); | |
48 | return 0; | |
49 | } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') { | |
50 | /* work tree is the root, or the whole path */ | |
51 | memmove(path, path + wtlen, len - wtlen + 1); | |
52 | return 0; | |
53 | } | |
54 | /* work tree might match beginning of a symlink to work tree */ | |
55 | off = wtlen; | |
56 | } | |
57 | path0 = path; | |
6127ff63 | 58 | path += off; |
ddc2a628 MEW |
59 | |
60 | /* check each '/'-terminated level */ | |
61 | while (*path) { | |
62 | path++; | |
63 | if (*path == '/') { | |
64 | *path = '\0'; | |
3d7747e3 AM |
65 | strbuf_realpath(&realpath, path0, 1); |
66 | if (fspathcmp(realpath.buf, work_tree) == 0) { | |
ddc2a628 | 67 | memmove(path0, path + 1, len - (path - path0)); |
3d7747e3 | 68 | strbuf_release(&realpath); |
ddc2a628 MEW |
69 | return 0; |
70 | } | |
71 | *path = '/'; | |
72 | } | |
73 | } | |
74 | ||
75 | /* check whole path */ | |
3d7747e3 AM |
76 | strbuf_realpath(&realpath, path0, 1); |
77 | if (fspathcmp(realpath.buf, work_tree) == 0) { | |
ddc2a628 | 78 | *path0 = '\0'; |
3d7747e3 | 79 | strbuf_release(&realpath); |
ddc2a628 MEW |
80 | return 0; |
81 | } | |
82 | ||
3d7747e3 | 83 | strbuf_release(&realpath); |
ddc2a628 MEW |
84 | return -1; |
85 | } | |
86 | ||
645a29c4 NTND |
87 | /* |
88 | * Normalize "path", prepending the "prefix" for relative paths. If | |
89 | * remaining_prefix is not NULL, return the actual prefix still | |
90 | * remains in the path. For example, prefix = sub1/sub2/ and path is | |
91 | * | |
92 | * foo -> sub1/sub2/foo (full prefix) | |
93 | * ../foo -> sub1/foo (remaining prefix is sub1/) | |
94 | * ../../bar -> bar (no remaining prefix) | |
95 | * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix) | |
96 | * `pwd`/../bar -> sub1/bar (no remaining prefix) | |
97 | */ | |
98 | char *prefix_path_gently(const char *prefix, int len, | |
99 | int *remaining_prefix, const char *path) | |
d089ebaa JH |
100 | { |
101 | const char *orig = path; | |
18e051a3 CMAB |
102 | char *sanitized; |
103 | if (is_absolute_path(orig)) { | |
3733e694 | 104 | sanitized = xmallocz(strlen(path)); |
645a29c4 NTND |
105 | if (remaining_prefix) |
106 | *remaining_prefix = 0; | |
655ee9ea MEW |
107 | if (normalize_path_copy_len(sanitized, path, remaining_prefix)) { |
108 | free(sanitized); | |
109 | return NULL; | |
110 | } | |
111 | if (abspath_part_inside_repo(sanitized)) { | |
112 | free(sanitized); | |
113 | return NULL; | |
114 | } | |
18e051a3 | 115 | } else { |
24041d6b | 116 | sanitized = xstrfmt("%.*s%s", len, len ? prefix : "", path); |
645a29c4 NTND |
117 | if (remaining_prefix) |
118 | *remaining_prefix = len; | |
655ee9ea | 119 | if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) { |
546e0fd9 JK |
120 | free(sanitized); |
121 | return NULL; | |
d089ebaa | 122 | } |
d089ebaa JH |
123 | } |
124 | return sanitized; | |
f332726e LT |
125 | } |
126 | ||
546e0fd9 JK |
127 | char *prefix_path(const char *prefix, int len, const char *path) |
128 | { | |
645a29c4 | 129 | char *r = prefix_path_gently(prefix, len, NULL, path); |
5c203986 ES |
130 | if (!r) { |
131 | const char *hint_path = get_git_work_tree(); | |
132 | if (!hint_path) | |
133 | hint_path = get_git_dir(); | |
e0020b2f | 134 | die(_("'%s' is outside repository at '%s'"), path, |
5c203986 ES |
135 | absolute_path(hint_path)); |
136 | } | |
546e0fd9 JK |
137 | return r; |
138 | } | |
139 | ||
140 | int path_inside_repo(const char *prefix, const char *path) | |
141 | { | |
142 | int len = prefix ? strlen(prefix) : 0; | |
645a29c4 | 143 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
144 | if (r) { |
145 | free(r); | |
146 | return 1; | |
147 | } | |
148 | return 0; | |
149 | } | |
150 | ||
c6e8c800 JH |
151 | int check_filename(const char *prefix, const char *arg) |
152 | { | |
e4da43b1 | 153 | char *to_free = NULL; |
c6e8c800 JH |
154 | struct stat st; |
155 | ||
d51c6ee0 JK |
156 | if (skip_prefix(arg, ":/", &arg)) { |
157 | if (!*arg) /* ":/" is root dir, always exists */ | |
4db86e8b | 158 | return 1; |
a08cbcda | 159 | prefix = NULL; |
42471bce JK |
160 | } else if (skip_prefix(arg, ":!", &arg) || |
161 | skip_prefix(arg, ":^", &arg)) { | |
162 | if (!*arg) /* excluding everything is silly, but allowed */ | |
163 | return 1; | |
a08cbcda JK |
164 | } |
165 | ||
166 | if (prefix) | |
167 | arg = to_free = prefix_filename(prefix, arg); | |
168 | ||
169 | if (!lstat(arg, &st)) { | |
e4da43b1 | 170 | free(to_free); |
c6e8c800 | 171 | return 1; /* file exists */ |
e4da43b1 | 172 | } |
93dd544f | 173 | if (is_missing_file_error(errno)) { |
e4da43b1 | 174 | free(to_free); |
c6e8c800 | 175 | return 0; /* file does not exist */ |
e4da43b1 | 176 | } |
fc045fe7 | 177 | die_errno(_("failed to stat '%s'"), arg); |
c6e8c800 JH |
178 | } |
179 | ||
e270f42c NTND |
180 | static void NORETURN die_verify_filename(struct repository *r, |
181 | const char *prefix, | |
023e37c3 MM |
182 | const char *arg, |
183 | int diagnose_misspelt_rev) | |
009fee47 | 184 | { |
023e37c3 | 185 | if (!diagnose_misspelt_rev) |
ab33a76e VA |
186 | die(_("%s: no such path in the working tree.\n" |
187 | "Use 'git <command> -- <path>...' to specify paths that do not exist locally."), | |
023e37c3 | 188 | arg); |
0e539dca JH |
189 | /* |
190 | * Saying "'(icase)foo' does not exist in the index" when the | |
191 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
192 | * begins with a colon and is followed by a non-alnum; do not | |
8c135ea2 | 193 | * let maybe_die_on_misspelt_object_name() even trigger. |
0e539dca JH |
194 | */ |
195 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
e270f42c | 196 | maybe_die_on_misspelt_object_name(r, arg, prefix); |
0e539dca | 197 | |
009fee47 | 198 | /* ... or fall back the most general message. */ |
ab33a76e VA |
199 | die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n" |
200 | "Use '--' to separate paths from revisions, like this:\n" | |
201 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
009fee47 MM |
202 | |
203 | } | |
204 | ||
c99eddd8 JK |
205 | /* |
206 | * Check for arguments that don't resolve as actual files, | |
207 | * but which look sufficiently like pathspecs that we'll consider | |
208 | * them such for the purposes of rev/pathspec DWIM parsing. | |
209 | */ | |
210 | static int looks_like_pathspec(const char *arg) | |
211 | { | |
39e21c6e JK |
212 | const char *p; |
213 | int escaped = 0; | |
214 | ||
215 | /* | |
216 | * Wildcard characters imply the user is looking to match pathspecs | |
217 | * that aren't in the filesystem. Note that this doesn't include | |
218 | * backslash even though it's a glob special; by itself it doesn't | |
219 | * cause any increase in the match. Likewise ignore backslash-escaped | |
220 | * wildcard characters. | |
221 | */ | |
222 | for (p = arg; *p; p++) { | |
223 | if (escaped) { | |
224 | escaped = 0; | |
225 | } else if (is_glob_special(*p)) { | |
226 | if (*p == '\\') | |
227 | escaped = 1; | |
228 | else | |
229 | return 1; | |
230 | } | |
231 | } | |
c99eddd8 JK |
232 | |
233 | /* long-form pathspec magic */ | |
234 | if (starts_with(arg, ":(")) | |
235 | return 1; | |
236 | ||
237 | return 0; | |
238 | } | |
239 | ||
e23d0b4a LT |
240 | /* |
241 | * Verify a filename that we got as an argument for a pathspec | |
242 | * entry. Note that a filename that begins with "-" never verifies | |
243 | * as true, because even if such a filename were to exist, we want | |
244 | * it to be preceded by the "--" marker (or we want the user to | |
245 | * use a format like "./-filename") | |
023e37c3 MM |
246 | * |
247 | * The "diagnose_misspelt_rev" is used to provide a user-friendly | |
248 | * diagnosis when dying upon finding that "name" is not a pathname. | |
249 | * If set to 1, the diagnosis will try to diagnose "name" as an | |
250 | * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis | |
251 | * will only complain about an inexisting file. | |
252 | * | |
253 | * This function is typically called to check that a "file or rev" | |
254 | * argument is unambiguous. In this case, the caller will want | |
255 | * diagnose_misspelt_rev == 1 when verifying the first non-rev | |
256 | * argument (which could have been a revision), and | |
257 | * diagnose_misspelt_rev == 0 for the next ones (because we already | |
258 | * saw a filename, there's not ambiguity anymore). | |
e23d0b4a | 259 | */ |
023e37c3 MM |
260 | void verify_filename(const char *prefix, |
261 | const char *arg, | |
262 | int diagnose_misspelt_rev) | |
e23d0b4a | 263 | { |
e23d0b4a | 264 | if (*arg == '-') |
fc045fe7 | 265 | die(_("option '%s' must come before non-option arguments"), arg); |
2cb47ab6 | 266 | if (looks_like_pathspec(arg) || check_filename(prefix, arg)) |
e23d0b4a | 267 | return; |
e270f42c | 268 | die_verify_filename(the_repository, prefix, arg, diagnose_misspelt_rev); |
e23d0b4a LT |
269 | } |
270 | ||
ea92f41f JH |
271 | /* |
272 | * Opposite of the above: the command line did not have -- marker | |
273 | * and we parsed the arg as a refname. It should not be interpretable | |
274 | * as a filename. | |
275 | */ | |
276 | void verify_non_filename(const char *prefix, const char *arg) | |
277 | { | |
7ae3df8c | 278 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 279 | return; |
ea92f41f JH |
280 | if (*arg == '-') |
281 | return; /* flag */ | |
c6e8c800 JH |
282 | if (!check_filename(prefix, arg)) |
283 | return; | |
ab33a76e VA |
284 | die(_("ambiguous argument '%s': both revision and filename\n" |
285 | "Use '--' to separate paths from revisions, like this:\n" | |
286 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
ea92f41f JH |
287 | } |
288 | ||
31e26ebc | 289 | int get_common_dir(struct strbuf *sb, const char *gitdir) |
11f9dd71 MK |
290 | { |
291 | const char *git_env_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT); | |
292 | if (git_env_common_dir) { | |
293 | strbuf_addstr(sb, git_env_common_dir); | |
294 | return 1; | |
295 | } else { | |
296 | return get_common_dir_noenv(sb, gitdir); | |
297 | } | |
298 | } | |
299 | ||
300 | int get_common_dir_noenv(struct strbuf *sb, const char *gitdir) | |
4dc4e145 NTND |
301 | { |
302 | struct strbuf data = STRBUF_INIT; | |
303 | struct strbuf path = STRBUF_INIT; | |
31e26ebc | 304 | int ret = 0; |
11f9dd71 | 305 | |
4dc4e145 NTND |
306 | strbuf_addf(&path, "%s/commondir", gitdir); |
307 | if (file_exists(path.buf)) { | |
308 | if (strbuf_read_file(&data, path.buf, 0) <= 0) | |
309 | die_errno(_("failed to read %s"), path.buf); | |
310 | while (data.len && (data.buf[data.len - 1] == '\n' || | |
311 | data.buf[data.len - 1] == '\r')) | |
312 | data.len--; | |
313 | data.buf[data.len] = '\0'; | |
314 | strbuf_reset(&path); | |
315 | if (!is_absolute_path(data.buf)) | |
316 | strbuf_addf(&path, "%s/", gitdir); | |
317 | strbuf_addbuf(&path, &data); | |
33ad9ddd | 318 | strbuf_add_real_path(sb, path.buf); |
31e26ebc | 319 | ret = 1; |
4ac9006f | 320 | } else { |
4dc4e145 | 321 | strbuf_addstr(sb, gitdir); |
4ac9006f BW |
322 | } |
323 | ||
4dc4e145 NTND |
324 | strbuf_release(&data); |
325 | strbuf_release(&path); | |
31e26ebc | 326 | return ret; |
4dc4e145 | 327 | } |
d288a700 | 328 | |
5f5608bc | 329 | /* |
ad1a382f | 330 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 331 | * We want to see: |
5f5608bc | 332 | * |
790296fd | 333 | * - either an objects/ directory _or_ the proper |
5f5608bc | 334 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 335 | * - a refs/ directory |
8098a178 | 336 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
337 | * a proper "ref:", or a regular file HEAD that has a properly |
338 | * formatted sha1 object name. | |
5f5608bc | 339 | */ |
b3256eb8 | 340 | int is_git_directory(const char *suspect) |
5f5608bc | 341 | { |
1d186b6f NTND |
342 | struct strbuf path = STRBUF_INIT; |
343 | int ret = 0; | |
344 | size_t len; | |
ad1a382f | 345 | |
4dc4e145 | 346 | /* Check worktree-related signatures */ |
fa4d8c78 JK |
347 | strbuf_addstr(&path, suspect); |
348 | strbuf_complete(&path, '/'); | |
349 | strbuf_addstr(&path, "HEAD"); | |
4dc4e145 NTND |
350 | if (validate_headref(path.buf)) |
351 | goto done; | |
352 | ||
353 | strbuf_reset(&path); | |
354 | get_common_dir(&path, suspect); | |
1d186b6f | 355 | len = path.len; |
4dc4e145 NTND |
356 | |
357 | /* Check non-worktree-related signatures */ | |
ad1a382f SP |
358 | if (getenv(DB_ENVIRONMENT)) { |
359 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
1d186b6f | 360 | goto done; |
ad1a382f SP |
361 | } |
362 | else { | |
4dc4e145 | 363 | strbuf_setlen(&path, len); |
1d186b6f NTND |
364 | strbuf_addstr(&path, "/objects"); |
365 | if (access(path.buf, X_OK)) | |
366 | goto done; | |
ad1a382f SP |
367 | } |
368 | ||
1d186b6f NTND |
369 | strbuf_setlen(&path, len); |
370 | strbuf_addstr(&path, "/refs"); | |
371 | if (access(path.buf, X_OK)) | |
372 | goto done; | |
ad1a382f | 373 | |
1d186b6f NTND |
374 | ret = 1; |
375 | done: | |
376 | strbuf_release(&path); | |
377 | return ret; | |
5f5608bc LT |
378 | } |
379 | ||
ffd036b1 JK |
380 | int is_nonbare_repository_dir(struct strbuf *path) |
381 | { | |
382 | int ret = 0; | |
383 | int gitfile_error; | |
384 | size_t orig_path_len = path->len; | |
385 | assert(orig_path_len != 0); | |
386 | strbuf_complete(path, '/'); | |
387 | strbuf_addstr(path, ".git"); | |
388 | if (read_gitfile_gently(path->buf, &gitfile_error) || is_git_directory(path->buf)) | |
389 | ret = 1; | |
390 | if (gitfile_error == READ_GITFILE_ERR_OPEN_FAILED || | |
391 | gitfile_error == READ_GITFILE_ERR_READ_FAILED) | |
392 | ret = 1; | |
393 | strbuf_setlen(path, orig_path_len); | |
394 | return ret; | |
395 | } | |
396 | ||
68025633 JS |
397 | int is_inside_git_dir(void) |
398 | { | |
e90fdc39 JS |
399 | if (inside_git_dir < 0) |
400 | inside_git_dir = is_inside_dir(get_git_dir()); | |
401 | return inside_git_dir; | |
892c41b9 ML |
402 | } |
403 | ||
892c41b9 ML |
404 | int is_inside_work_tree(void) |
405 | { | |
e90fdc39 JS |
406 | if (inside_work_tree < 0) |
407 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
408 | return inside_work_tree; | |
892c41b9 ML |
409 | } |
410 | ||
f3fa1838 JH |
411 | void setup_work_tree(void) |
412 | { | |
8500e0de | 413 | const char *work_tree; |
354e6534 JS |
414 | static int initialized = 0; |
415 | ||
416 | if (initialized) | |
417 | return; | |
fada7674 JK |
418 | |
419 | if (work_tree_config_is_bogus) | |
fc045fe7 | 420 | die(_("unable to set up work tree using invalid config")); |
fada7674 | 421 | |
354e6534 | 422 | work_tree = get_git_work_tree(); |
8500e0de | 423 | if (!work_tree || chdir_notify(work_tree)) |
fc045fe7 | 424 | die(_("this operation must be run in a work tree")); |
0ed74813 NTND |
425 | |
426 | /* | |
427 | * Make sure subsequent git processes find correct worktree | |
428 | * if $GIT_WORK_TREE is set relative | |
429 | */ | |
430 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
431 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
432 | ||
354e6534 | 433 | initialized = 1; |
59f0f2f3 MH |
434 | } |
435 | ||
e6f8861b EN |
436 | static void setup_original_cwd(void) |
437 | { | |
438 | struct strbuf tmp = STRBUF_INIT; | |
439 | const char *worktree = NULL; | |
440 | int offset = -1; | |
441 | ||
442 | if (!tmp_original_cwd) | |
443 | return; | |
444 | ||
445 | /* | |
446 | * startup_info->original_cwd points to the current working | |
447 | * directory we inherited from our parent process, which is a | |
448 | * directory we want to avoid removing. | |
449 | * | |
450 | * For convience, we would like to have the path relative to the | |
451 | * worktree instead of an absolute path. | |
452 | * | |
453 | * Yes, startup_info->original_cwd is usually the same as 'prefix', | |
454 | * but differs in two ways: | |
455 | * - prefix has a trailing '/' | |
456 | * - if the user passes '-C' to git, that modifies the prefix but | |
457 | * not startup_info->original_cwd. | |
458 | */ | |
459 | ||
460 | /* Normalize the directory */ | |
461 | strbuf_realpath(&tmp, tmp_original_cwd, 1); | |
462 | free((char*)tmp_original_cwd); | |
463 | tmp_original_cwd = NULL; | |
464 | startup_info->original_cwd = strbuf_detach(&tmp, NULL); | |
465 | ||
466 | /* | |
467 | * Get our worktree; we only protect the current working directory | |
468 | * if it's in the worktree. | |
469 | */ | |
470 | worktree = get_git_work_tree(); | |
471 | if (!worktree) | |
472 | goto no_prevention_needed; | |
473 | ||
474 | offset = dir_inside_of(startup_info->original_cwd, worktree); | |
475 | if (offset >= 0) { | |
476 | /* | |
477 | * If startup_info->original_cwd == worktree, that is already | |
478 | * protected and we don't need original_cwd as a secondary | |
479 | * protection measure. | |
480 | */ | |
481 | if (!*(startup_info->original_cwd + offset)) | |
482 | goto no_prevention_needed; | |
483 | ||
484 | /* | |
485 | * original_cwd was inside worktree; precompose it just as | |
486 | * we do prefix so that built up paths will match | |
487 | */ | |
488 | startup_info->original_cwd = \ | |
489 | precompose_string_if_needed(startup_info->original_cwd | |
490 | + offset); | |
491 | return; | |
492 | } | |
493 | ||
494 | no_prevention_needed: | |
495 | free((char*)startup_info->original_cwd); | |
496 | startup_info->original_cwd = NULL; | |
497 | } | |
498 | ||
58b284a2 NTND |
499 | static int read_worktree_config(const char *var, const char *value, void *vdata) |
500 | { | |
501 | struct repository_format *data = vdata; | |
502 | ||
503 | if (strcmp(var, "core.bare") == 0) { | |
504 | data->is_bare = git_config_bool(var, value); | |
505 | } else if (strcmp(var, "core.worktree") == 0) { | |
506 | if (!value) | |
507 | return config_error_nonbool(var); | |
13019979 | 508 | free(data->work_tree); |
58b284a2 NTND |
509 | data->work_tree = xstrdup(value); |
510 | } | |
511 | return 0; | |
512 | } | |
513 | ||
ec91ffca JK |
514 | enum extension_result { |
515 | EXTENSION_ERROR = -1, /* compatible with error(), etc */ | |
516 | EXTENSION_UNKNOWN = 0, | |
517 | EXTENSION_OK = 1 | |
518 | }; | |
519 | ||
520 | /* | |
521 | * Do not add new extensions to this function. It handles extensions which are | |
522 | * respected even in v0-format repositories for historical compatibility. | |
523 | */ | |
524 | static enum extension_result handle_extension_v0(const char *var, | |
525 | const char *value, | |
526 | const char *ext, | |
527 | struct repository_format *data) | |
528 | { | |
529 | if (!strcmp(ext, "noop")) { | |
530 | return EXTENSION_OK; | |
531 | } else if (!strcmp(ext, "preciousobjects")) { | |
532 | data->precious_objects = git_config_bool(var, value); | |
533 | return EXTENSION_OK; | |
534 | } else if (!strcmp(ext, "partialclone")) { | |
ec91ffca JK |
535 | data->partial_clone = xstrdup(value); |
536 | return EXTENSION_OK; | |
537 | } else if (!strcmp(ext, "worktreeconfig")) { | |
538 | data->worktree_config = git_config_bool(var, value); | |
539 | return EXTENSION_OK; | |
540 | } | |
541 | ||
542 | return EXTENSION_UNKNOWN; | |
543 | } | |
544 | ||
545 | /* | |
546 | * Record any new extensions in this function. | |
547 | */ | |
548 | static enum extension_result handle_extension(const char *var, | |
549 | const char *value, | |
550 | const char *ext, | |
551 | struct repository_format *data) | |
552 | { | |
553 | if (!strcmp(ext, "noop-v1")) { | |
554 | return EXTENSION_OK; | |
e0ad9574 JH |
555 | } else if (!strcmp(ext, "objectformat")) { |
556 | int format; | |
ec91ffca | 557 | |
e0ad9574 JH |
558 | if (!value) |
559 | return config_error_nonbool(var); | |
560 | format = hash_algo_by_name(value); | |
561 | if (format == GIT_HASH_UNKNOWN) | |
562 | return error("invalid value for 'extensions.objectformat'"); | |
563 | data->hash_algo = format; | |
564 | return EXTENSION_OK; | |
565 | } | |
ec91ffca JK |
566 | return EXTENSION_UNKNOWN; |
567 | } | |
568 | ||
2cc7c2c7 | 569 | static int check_repo_format(const char *var, const char *value, void *vdata) |
31e26ebc | 570 | { |
2cc7c2c7 | 571 | struct repository_format *data = vdata; |
00a09d57 JK |
572 | const char *ext; |
573 | ||
31e26ebc | 574 | if (strcmp(var, "core.repositoryformatversion") == 0) |
2cc7c2c7 | 575 | data->version = git_config_int(var, value); |
00a09d57 | 576 | else if (skip_prefix(var, "extensions.", &ext)) { |
ec91ffca JK |
577 | switch (handle_extension_v0(var, value, ext, data)) { |
578 | case EXTENSION_ERROR: | |
579 | return -1; | |
580 | case EXTENSION_OK: | |
581 | return 0; | |
582 | case EXTENSION_UNKNOWN: | |
583 | break; | |
584 | } | |
585 | ||
586 | switch (handle_extension(var, value, ext, data)) { | |
587 | case EXTENSION_ERROR: | |
588 | return -1; | |
589 | case EXTENSION_OK: | |
590 | string_list_append(&data->v1_only_extensions, ext); | |
591 | return 0; | |
592 | case EXTENSION_UNKNOWN: | |
2cc7c2c7 | 593 | string_list_append(&data->unknown_extensions, ext); |
ec91ffca JK |
594 | return 0; |
595 | } | |
00a09d57 | 596 | } |
58b284a2 NTND |
597 | |
598 | return read_worktree_config(var, value, vdata); | |
31e26ebc NTND |
599 | } |
600 | ||
abade65b | 601 | static int check_repository_format_gently(const char *gitdir, struct repository_format *candidate, int *nongit_ok) |
9459aa77 | 602 | { |
7d0fb0da | 603 | struct strbuf sb = STRBUF_INIT; |
2cc7c2c7 | 604 | struct strbuf err = STRBUF_INIT; |
652f18ee | 605 | int has_common; |
00a09d57 | 606 | |
652f18ee | 607 | has_common = get_common_dir(&sb, gitdir); |
e61a509a | 608 | strbuf_addstr(&sb, "/config"); |
abade65b | 609 | read_repository_format(candidate, sb.buf); |
2cc7c2c7 | 610 | strbuf_release(&sb); |
e61a509a | 611 | |
337e51ce | 612 | /* |
2cc7c2c7 JK |
613 | * For historical use of check_repository_format() in git-init, |
614 | * we treat a missing config as a silent "ok", even when nongit_ok | |
615 | * is unset. | |
337e51ce | 616 | */ |
abade65b | 617 | if (candidate->version < 0) |
2cc7c2c7 JK |
618 | return 0; |
619 | ||
abade65b | 620 | if (verify_repository_format(candidate, &err) < 0) { |
2cc7c2c7 JK |
621 | if (nongit_ok) { |
622 | warning("%s", err.buf); | |
623 | strbuf_release(&err); | |
624 | *nongit_ok = -1; | |
625 | return -1; | |
626 | } | |
627 | die("%s", err.buf); | |
628 | } | |
629 | ||
11664196 | 630 | repository_format_precious_objects = candidate->precious_objects; |
11664196 | 631 | repository_format_worktree_config = candidate->worktree_config; |
abade65b | 632 | string_list_clear(&candidate->unknown_extensions, 0); |
ec91ffca | 633 | string_list_clear(&candidate->v1_only_extensions, 0); |
58b284a2 NTND |
634 | |
635 | if (repository_format_worktree_config) { | |
636 | /* | |
637 | * pick up core.bare and core.worktree from per-worktree | |
638 | * config if present | |
639 | */ | |
640 | strbuf_addf(&sb, "%s/config.worktree", gitdir); | |
641 | git_config_from_file(read_worktree_config, sb.buf, candidate); | |
642 | strbuf_release(&sb); | |
643 | has_common = 0; | |
644 | } | |
645 | ||
652f18ee | 646 | if (!has_common) { |
abade65b | 647 | if (candidate->is_bare != -1) { |
648 | is_bare_repository_cfg = candidate->is_bare; | |
652f18ee JK |
649 | if (is_bare_repository_cfg == 1) |
650 | inside_work_tree = -1; | |
651 | } | |
abade65b | 652 | if (candidate->work_tree) { |
652f18ee | 653 | free(git_work_tree_cfg); |
e8805af1 | 654 | git_work_tree_cfg = xstrdup(candidate->work_tree); |
2cc7c2c7 | 655 | inside_work_tree = -1; |
652f18ee | 656 | } |
2cc7c2c7 JK |
657 | } |
658 | ||
659 | return 0; | |
660 | } | |
661 | ||
16af5f1a XL |
662 | int upgrade_repository_format(int target_version) |
663 | { | |
664 | struct strbuf sb = STRBUF_INIT; | |
665 | struct strbuf err = STRBUF_INIT; | |
666 | struct strbuf repo_version = STRBUF_INIT; | |
667 | struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT; | |
668 | ||
669 | strbuf_git_common_path(&sb, the_repository, "config"); | |
670 | read_repository_format(&repo_fmt, sb.buf); | |
671 | strbuf_release(&sb); | |
672 | ||
673 | if (repo_fmt.version >= target_version) | |
674 | return 0; | |
675 | ||
62f2eca6 JN |
676 | if (verify_repository_format(&repo_fmt, &err) < 0) { |
677 | error("cannot upgrade repository format from %d to %d: %s", | |
678 | repo_fmt.version, target_version, err.buf); | |
16af5f1a XL |
679 | strbuf_release(&err); |
680 | return -1; | |
681 | } | |
62f2eca6 JN |
682 | if (!repo_fmt.version && repo_fmt.unknown_extensions.nr) |
683 | return error("cannot upgrade repository format: " | |
684 | "unknown extension %s", | |
685 | repo_fmt.unknown_extensions.items[0].string); | |
16af5f1a XL |
686 | |
687 | strbuf_addf(&repo_version, "%d", target_version); | |
688 | git_config_set("core.repositoryformatversion", repo_version.buf); | |
689 | strbuf_release(&repo_version); | |
690 | return 1; | |
691 | } | |
692 | ||
e8805af1 MÅ |
693 | static void init_repository_format(struct repository_format *format) |
694 | { | |
695 | const struct repository_format fresh = REPOSITORY_FORMAT_INIT; | |
696 | ||
697 | memcpy(format, &fresh, sizeof(fresh)); | |
698 | } | |
699 | ||
652f18ee | 700 | int read_repository_format(struct repository_format *format, const char *path) |
2cc7c2c7 | 701 | { |
e8805af1 | 702 | clear_repository_format(format); |
652f18ee | 703 | git_config_from_file(check_repo_format, path, format); |
e8805af1 MÅ |
704 | if (format->version == -1) |
705 | clear_repository_format(format); | |
2cc7c2c7 JK |
706 | return format->version; |
707 | } | |
708 | ||
e8805af1 MÅ |
709 | void clear_repository_format(struct repository_format *format) |
710 | { | |
711 | string_list_clear(&format->unknown_extensions, 0); | |
ec91ffca | 712 | string_list_clear(&format->v1_only_extensions, 0); |
e8805af1 MÅ |
713 | free(format->work_tree); |
714 | free(format->partial_clone); | |
715 | init_repository_format(format); | |
716 | } | |
717 | ||
2cc7c2c7 JK |
718 | int verify_repository_format(const struct repository_format *format, |
719 | struct strbuf *err) | |
720 | { | |
721 | if (GIT_REPO_VERSION_READ < format->version) { | |
274db840 | 722 | strbuf_addf(err, _("Expected git repo version <= %d, found %d"), |
2cc7c2c7 JK |
723 | GIT_REPO_VERSION_READ, format->version); |
724 | return -1; | |
725 | } | |
726 | ||
727 | if (format->version >= 1 && format->unknown_extensions.nr) { | |
00a09d57 JK |
728 | int i; |
729 | ||
8013d7d9 AH |
730 | strbuf_addstr(err, Q_("unknown repository extension found:", |
731 | "unknown repository extensions found:", | |
732 | format->unknown_extensions.nr)); | |
00a09d57 | 733 | |
2cc7c2c7 JK |
734 | for (i = 0; i < format->unknown_extensions.nr; i++) |
735 | strbuf_addf(err, "\n\t%s", | |
736 | format->unknown_extensions.items[i].string); | |
737 | return -1; | |
00a09d57 JK |
738 | } |
739 | ||
ec91ffca JK |
740 | if (format->version == 0 && format->v1_only_extensions.nr) { |
741 | int i; | |
742 | ||
743 | strbuf_addstr(err, | |
8013d7d9 AH |
744 | Q_("repo version is 0, but v1-only extension found:", |
745 | "repo version is 0, but v1-only extensions found:", | |
746 | format->v1_only_extensions.nr)); | |
ec91ffca JK |
747 | |
748 | for (i = 0; i < format->v1_only_extensions.nr; i++) | |
749 | strbuf_addf(err, "\n\t%s", | |
750 | format->v1_only_extensions.items[i].string); | |
751 | return -1; | |
752 | } | |
753 | ||
2cc7c2c7 | 754 | return 0; |
9459aa77 NTND |
755 | } |
756 | ||
5f29433f SB |
757 | void read_gitfile_error_die(int error_code, const char *path, const char *dir) |
758 | { | |
759 | switch (error_code) { | |
760 | case READ_GITFILE_ERR_STAT_FAILED: | |
761 | case READ_GITFILE_ERR_NOT_A_FILE: | |
762 | /* non-fatal; follow return path */ | |
763 | break; | |
764 | case READ_GITFILE_ERR_OPEN_FAILED: | |
fc045fe7 | 765 | die_errno(_("error opening '%s'"), path); |
5f29433f | 766 | case READ_GITFILE_ERR_TOO_LARGE: |
fc045fe7 | 767 | die(_("too large to be a .git file: '%s'"), path); |
5f29433f | 768 | case READ_GITFILE_ERR_READ_FAILED: |
fc045fe7 | 769 | die(_("error reading %s"), path); |
5f29433f | 770 | case READ_GITFILE_ERR_INVALID_FORMAT: |
fc045fe7 | 771 | die(_("invalid gitfile format: %s"), path); |
5f29433f | 772 | case READ_GITFILE_ERR_NO_PATH: |
fc045fe7 | 773 | die(_("no path in gitfile: %s"), path); |
5f29433f | 774 | case READ_GITFILE_ERR_NOT_A_REPO: |
fc045fe7 | 775 | die(_("not a git repository: %s"), dir); |
5f29433f | 776 | default: |
033abf97 | 777 | BUG("unknown error code"); |
5f29433f SB |
778 | } |
779 | } | |
780 | ||
b44ebb19 LH |
781 | /* |
782 | * Try to read the location of the git directory from the .git file, | |
ea1d8756 HWN |
783 | * return path to git directory if found. The return value comes from |
784 | * a shared buffer. | |
a93bedad EE |
785 | * |
786 | * On failure, if return_error_code is not NULL, return_error_code | |
787 | * will be set to an error code and NULL will be returned. If | |
788 | * return_error_code is NULL the function will die instead (for most | |
789 | * cases). | |
b44ebb19 | 790 | */ |
a93bedad | 791 | const char *read_gitfile_gently(const char *path, int *return_error_code) |
b44ebb19 | 792 | { |
921bdd96 | 793 | const int max_file_size = 1 << 20; /* 1MB */ |
a93bedad EE |
794 | int error_code = 0; |
795 | char *buf = NULL; | |
796 | char *dir = NULL; | |
40c813e0 | 797 | const char *slash; |
b44ebb19 LH |
798 | struct stat st; |
799 | int fd; | |
b1905aea | 800 | ssize_t len; |
3d7747e3 | 801 | static struct strbuf realpath = STRBUF_INIT; |
b44ebb19 | 802 | |
a93bedad | 803 | if (stat(path, &st)) { |
5c4003ca | 804 | /* NEEDSWORK: discern between ENOENT vs other errors */ |
a93bedad EE |
805 | error_code = READ_GITFILE_ERR_STAT_FAILED; |
806 | goto cleanup_return; | |
807 | } | |
808 | if (!S_ISREG(st.st_mode)) { | |
809 | error_code = READ_GITFILE_ERR_NOT_A_FILE; | |
810 | goto cleanup_return; | |
811 | } | |
921bdd96 EE |
812 | if (st.st_size > max_file_size) { |
813 | error_code = READ_GITFILE_ERR_TOO_LARGE; | |
814 | goto cleanup_return; | |
815 | } | |
b44ebb19 | 816 | fd = open(path, O_RDONLY); |
a93bedad EE |
817 | if (fd < 0) { |
818 | error_code = READ_GITFILE_ERR_OPEN_FAILED; | |
819 | goto cleanup_return; | |
820 | } | |
3733e694 | 821 | buf = xmallocz(st.st_size); |
b44ebb19 LH |
822 | len = read_in_full(fd, buf, st.st_size); |
823 | close(fd); | |
a93bedad EE |
824 | if (len != st.st_size) { |
825 | error_code = READ_GITFILE_ERR_READ_FAILED; | |
826 | goto cleanup_return; | |
827 | } | |
a93bedad EE |
828 | if (!starts_with(buf, "gitdir: ")) { |
829 | error_code = READ_GITFILE_ERR_INVALID_FORMAT; | |
830 | goto cleanup_return; | |
831 | } | |
b44ebb19 LH |
832 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') |
833 | len--; | |
a93bedad EE |
834 | if (len < 9) { |
835 | error_code = READ_GITFILE_ERR_NO_PATH; | |
836 | goto cleanup_return; | |
837 | } | |
b44ebb19 | 838 | buf[len] = '\0'; |
40c813e0 BK |
839 | dir = buf + 8; |
840 | ||
841 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
842 | size_t pathlen = slash+1 - path; | |
75faa45a JK |
843 | dir = xstrfmt("%.*s%.*s", (int)pathlen, path, |
844 | (int)(len - 8), buf + 8); | |
40c813e0 BK |
845 | free(buf); |
846 | buf = dir; | |
847 | } | |
a93bedad EE |
848 | if (!is_git_directory(dir)) { |
849 | error_code = READ_GITFILE_ERR_NOT_A_REPO; | |
850 | goto cleanup_return; | |
851 | } | |
3d7747e3 AM |
852 | |
853 | strbuf_realpath(&realpath, dir, 1); | |
854 | path = realpath.buf; | |
40c813e0 | 855 | |
a93bedad | 856 | cleanup_return: |
a93bedad EE |
857 | if (return_error_code) |
858 | *return_error_code = error_code; | |
5f29433f SB |
859 | else if (error_code) |
860 | read_gitfile_error_die(error_code, path, dir); | |
a93bedad | 861 | |
b44ebb19 | 862 | free(buf); |
38ae8784 | 863 | return error_code ? NULL : path; |
b44ebb19 LH |
864 | } |
865 | ||
e4e30347 | 866 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
7333ed17 | 867 | struct strbuf *cwd, |
abade65b | 868 | struct repository_format *repo_fmt, |
b3f66fd3 | 869 | int *nongit_ok) |
e4e30347 | 870 | { |
b3f66fd3 NTND |
871 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
872 | const char *worktree; | |
873 | char *gitfile; | |
9b125da4 | 874 | int offset; |
e4e30347 JN |
875 | |
876 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
fc045fe7 | 877 | die(_("'$%s' too big"), GIT_DIR_ENVIRONMENT); |
b3f66fd3 | 878 | |
13d6ec91 | 879 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
880 | if (gitfile) { |
881 | gitfile = xstrdup(gitfile); | |
882 | gitdirenv = gitfile; | |
883 | } | |
884 | ||
e4e30347 JN |
885 | if (!is_git_directory(gitdirenv)) { |
886 | if (nongit_ok) { | |
887 | *nongit_ok = 1; | |
b3f66fd3 | 888 | free(gitfile); |
e4e30347 JN |
889 | return NULL; |
890 | } | |
fc045fe7 | 891 | die(_("not a git repository: '%s'"), gitdirenv); |
e4e30347 | 892 | } |
b3f66fd3 | 893 | |
abade65b | 894 | if (check_repository_format_gently(gitdirenv, repo_fmt, nongit_ok)) { |
b3f66fd3 NTND |
895 | free(gitfile); |
896 | return NULL; | |
e4e30347 | 897 | } |
b3f66fd3 NTND |
898 | |
899 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
900 | if (work_tree_env) | |
901 | set_git_work_tree(work_tree_env); | |
902 | else if (is_bare_repository_cfg > 0) { | |
fada7674 JK |
903 | if (git_work_tree_cfg) { |
904 | /* #22.2, #30 */ | |
905 | warning("core.bare and core.worktree do not make sense"); | |
906 | work_tree_config_is_bogus = 1; | |
907 | } | |
b3f66fd3 NTND |
908 | |
909 | /* #18, #26 */ | |
0915a5b4 | 910 | set_git_dir(gitdirenv, 0); |
b3f66fd3 | 911 | free(gitfile); |
e4e30347 | 912 | return NULL; |
b3f66fd3 NTND |
913 | } |
914 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
915 | if (is_absolute_path(git_work_tree_cfg)) | |
916 | set_git_work_tree(git_work_tree_cfg); | |
917 | else { | |
56b9f6e7 | 918 | char *core_worktree; |
b3f66fd3 | 919 | if (chdir(gitdirenv)) |
fc045fe7 | 920 | die_errno(_("cannot chdir to '%s'"), gitdirenv); |
b3f66fd3 | 921 | if (chdir(git_work_tree_cfg)) |
fc045fe7 | 922 | die_errno(_("cannot chdir to '%s'"), git_work_tree_cfg); |
56b9f6e7 | 923 | core_worktree = xgetcwd(); |
7333ed17 | 924 | if (chdir(cwd->buf)) |
fc045fe7 | 925 | die_errno(_("cannot come back to cwd")); |
b3f66fd3 | 926 | set_git_work_tree(core_worktree); |
56b9f6e7 | 927 | free(core_worktree); |
b3f66fd3 NTND |
928 | } |
929 | } | |
2cd83d10 JK |
930 | else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) { |
931 | /* #16d */ | |
0915a5b4 | 932 | set_git_dir(gitdirenv, 0); |
2cd83d10 JK |
933 | free(gitfile); |
934 | return NULL; | |
935 | } | |
b3f66fd3 NTND |
936 | else /* #2, #10 */ |
937 | set_git_work_tree("."); | |
938 | ||
939 | /* set_git_work_tree() must have been called by now */ | |
940 | worktree = get_git_work_tree(); | |
941 | ||
942 | /* both get_git_work_tree() and cwd are already normalized */ | |
7333ed17 | 943 | if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */ |
0915a5b4 | 944 | set_git_dir(gitdirenv, 0); |
b3f66fd3 | 945 | free(gitfile); |
e4e30347 | 946 | return NULL; |
b3f66fd3 | 947 | } |
e4e30347 | 948 | |
7333ed17 | 949 | offset = dir_inside_of(cwd->buf, worktree); |
9b125da4 | 950 | if (offset >= 0) { /* cwd inside worktree? */ |
0915a5b4 | 951 | set_git_dir(gitdirenv, 1); |
b3f66fd3 | 952 | if (chdir(worktree)) |
fc045fe7 | 953 | die_errno(_("cannot chdir to '%s'"), worktree); |
7333ed17 | 954 | strbuf_addch(cwd, '/'); |
b3f66fd3 | 955 | free(gitfile); |
7333ed17 | 956 | return cwd->buf + offset; |
93a00542 | 957 | } |
b3f66fd3 NTND |
958 | |
959 | /* cwd outside worktree */ | |
0915a5b4 | 960 | set_git_dir(gitdirenv, 0); |
b3f66fd3 NTND |
961 | free(gitfile); |
962 | return NULL; | |
93a00542 JN |
963 | } |
964 | ||
9951d3b3 | 965 | static const char *setup_discovered_git_dir(const char *gitdir, |
7333ed17 | 966 | struct strbuf *cwd, int offset, |
abade65b | 967 | struct repository_format *repo_fmt, |
9951d3b3 | 968 | int *nongit_ok) |
98937bef | 969 | { |
abade65b | 970 | if (check_repository_format_gently(gitdir, repo_fmt, nongit_ok)) |
9951d3b3 | 971 | return NULL; |
98937bef | 972 | |
4868b2ea JN |
973 | /* --work-tree is set without --git-dir; use discovered one */ |
974 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
2d4dcf21 JS |
975 | char *to_free = NULL; |
976 | const char *ret; | |
977 | ||
7333ed17 | 978 | if (offset != cwd->len && !is_absolute_path(gitdir)) |
2d4dcf21 | 979 | gitdir = to_free = real_pathdup(gitdir, 1); |
7333ed17 | 980 | if (chdir(cwd->buf)) |
fc045fe7 | 981 | die_errno(_("cannot come back to cwd")); |
abade65b | 982 | ret = setup_explicit_git_dir(gitdir, cwd, repo_fmt, nongit_ok); |
2d4dcf21 JS |
983 | free(to_free); |
984 | return ret; | |
4868b2ea JN |
985 | } |
986 | ||
9951d3b3 NTND |
987 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
988 | if (is_bare_repository_cfg > 0) { | |
0915a5b4 | 989 | set_git_dir(gitdir, (offset != cwd->len)); |
7333ed17 | 990 | if (chdir(cwd->buf)) |
fc045fe7 | 991 | die_errno(_("cannot come back to cwd")); |
98937bef | 992 | return NULL; |
9951d3b3 | 993 | } |
98937bef | 994 | |
9951d3b3 NTND |
995 | /* #0, #1, #5, #8, #9, #12, #13 */ |
996 | set_git_work_tree("."); | |
997 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
0915a5b4 | 998 | set_git_dir(gitdir, 0); |
98937bef | 999 | inside_git_dir = 0; |
9951d3b3 | 1000 | inside_work_tree = 1; |
5cf7b3b1 | 1001 | if (offset >= cwd->len) |
98937bef NTND |
1002 | return NULL; |
1003 | ||
df380d58 JS |
1004 | /* Make "offset" point past the '/' (already the case for root dirs) */ |
1005 | if (offset != offset_1st_component(cwd->buf)) | |
1006 | offset++; | |
1007 | /* Add a '/' at the end */ | |
7333ed17 RS |
1008 | strbuf_addch(cwd, '/'); |
1009 | return cwd->buf + offset; | |
98937bef NTND |
1010 | } |
1011 | ||
1cd8031b | 1012 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
7333ed17 | 1013 | static const char *setup_bare_git_dir(struct strbuf *cwd, int offset, |
abade65b | 1014 | struct repository_format *repo_fmt, |
7333ed17 | 1015 | int *nongit_ok) |
68698da5 JN |
1016 | { |
1017 | int root_len; | |
1018 | ||
abade65b | 1019 | if (check_repository_format_gently(".", repo_fmt, nongit_ok)) |
1cd8031b NTND |
1020 | return NULL; |
1021 | ||
2cd83d10 JK |
1022 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
1023 | ||
4868b2ea JN |
1024 | /* --work-tree is set without --git-dir; use discovered one */ |
1025 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
da6f8475 | 1026 | static const char *gitdir; |
4868b2ea | 1027 | |
7333ed17 RS |
1028 | gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset); |
1029 | if (chdir(cwd->buf)) | |
fc045fe7 | 1030 | die_errno(_("cannot come back to cwd")); |
abade65b | 1031 | return setup_explicit_git_dir(gitdir, cwd, repo_fmt, nongit_ok); |
4868b2ea JN |
1032 | } |
1033 | ||
68698da5 | 1034 | inside_git_dir = 1; |
1cd8031b | 1035 | inside_work_tree = 0; |
7333ed17 RS |
1036 | if (offset != cwd->len) { |
1037 | if (chdir(cwd->buf)) | |
fc045fe7 | 1038 | die_errno(_("cannot come back to cwd")); |
7333ed17 RS |
1039 | root_len = offset_1st_component(cwd->buf); |
1040 | strbuf_setlen(cwd, offset > root_len ? offset : root_len); | |
0915a5b4 | 1041 | set_git_dir(cwd->buf, 0); |
337e51ce | 1042 | } |
1cd8031b | 1043 | else |
0915a5b4 | 1044 | set_git_dir(".", 0); |
68698da5 JN |
1045 | return NULL; |
1046 | } | |
1047 | ||
2565b43b | 1048 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
60c98d1e JN |
1049 | { |
1050 | struct stat buf; | |
2565b43b | 1051 | if (stat(path, &buf)) { |
fc045fe7 | 1052 | die_errno(_("failed to stat '%*s%s%s'"), |
2565b43b | 1053 | prefix_len, |
60c98d1e JN |
1054 | prefix ? prefix : "", |
1055 | prefix ? "/" : "", path); | |
2565b43b | 1056 | } |
60c98d1e JN |
1057 | return buf.st_dev; |
1058 | } | |
1059 | ||
9e2326c7 | 1060 | /* |
1b77d83c | 1061 | * A "string_list_each_func_t" function that canonicalizes an entry |
4530a85b | 1062 | * from GIT_CEILING_DIRECTORIES using real_pathdup(), or |
7ec30aaa MH |
1063 | * discards it if unusable. The presence of an empty entry in |
1064 | * GIT_CEILING_DIRECTORIES turns off canonicalization for all | |
1065 | * subsequent entries. | |
9e2326c7 | 1066 | */ |
1b77d83c | 1067 | static int canonicalize_ceiling_entry(struct string_list_item *item, |
7ec30aaa | 1068 | void *cb_data) |
9e2326c7 | 1069 | { |
7ec30aaa | 1070 | int *empty_entry_found = cb_data; |
1b77d83c | 1071 | char *ceil = item->string; |
9e2326c7 | 1072 | |
7ec30aaa MH |
1073 | if (!*ceil) { |
1074 | *empty_entry_found = 1; | |
9e2326c7 | 1075 | return 0; |
7ec30aaa | 1076 | } else if (!is_absolute_path(ceil)) { |
9e2326c7 | 1077 | return 0; |
7ec30aaa MH |
1078 | } else if (*empty_entry_found) { |
1079 | /* Keep entry but do not canonicalize it */ | |
1080 | return 1; | |
1081 | } else { | |
ce83eadd | 1082 | char *real_path = real_pathdup(ceil, 0); |
4ac9006f | 1083 | if (!real_path) { |
7ec30aaa | 1084 | return 0; |
4ac9006f | 1085 | } |
7ec30aaa | 1086 | free(item->string); |
4ac9006f | 1087 | item->string = real_path; |
7ec30aaa MH |
1088 | return 1; |
1089 | } | |
9e2326c7 MH |
1090 | } |
1091 | ||
ce9b8aab JS |
1092 | enum discovery_result { |
1093 | GIT_DIR_NONE = 0, | |
1094 | GIT_DIR_EXPLICIT, | |
1095 | GIT_DIR_DISCOVERED, | |
1096 | GIT_DIR_BARE, | |
1097 | /* these are errors */ | |
1098 | GIT_DIR_HIT_CEILING = -1, | |
01017dce JS |
1099 | GIT_DIR_HIT_MOUNT_POINT = -2, |
1100 | GIT_DIR_INVALID_GITFILE = -3 | |
ce9b8aab JS |
1101 | }; |
1102 | ||
e90fdc39 JS |
1103 | /* |
1104 | * We cannot decide in this function whether we are in the work tree or | |
1105 | * not, since the config can only be read _after_ this function was called. | |
ce9b8aab JS |
1106 | * |
1107 | * Also, we avoid changing any global state (such as the current working | |
1108 | * directory) to allow early callers. | |
1109 | * | |
1110 | * The directory where the search should start needs to be passed in via the | |
1111 | * `dir` parameter; upon return, the `dir` buffer will contain the path of | |
1112 | * the directory where the search ended, and `gitdir` will contain the path of | |
1113 | * the discovered .git/ directory, if any. If `gitdir` is not absolute, it | |
1114 | * is relative to `dir` (i.e. *not* necessarily the cwd). | |
e90fdc39 | 1115 | */ |
ce9b8aab | 1116 | static enum discovery_result setup_git_directory_gently_1(struct strbuf *dir, |
01017dce JS |
1117 | struct strbuf *gitdir, |
1118 | int die_on_error) | |
d288a700 | 1119 | { |
0454dd93 | 1120 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
31171d9e | 1121 | struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; |
ce9b8aab | 1122 | const char *gitdirenv; |
d17f2124 | 1123 | int ceil_offset = -1, min_offset = offset_1st_component(dir->buf); |
c7d1d1b1 RH |
1124 | dev_t current_device = 0; |
1125 | int one_filesystem = 1; | |
d288a700 | 1126 | |
e90fdc39 JS |
1127 | /* |
1128 | * If GIT_DIR is set explicitly, we're not going | |
1129 | * to do any discovery, but we still do repository | |
1130 | * validation. | |
1131 | */ | |
ad1a382f | 1132 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
ce9b8aab JS |
1133 | if (gitdirenv) { |
1134 | strbuf_addstr(gitdir, gitdirenv); | |
1135 | return GIT_DIR_EXPLICIT; | |
1136 | } | |
d288a700 | 1137 | |
31171d9e | 1138 | if (env_ceiling_dirs) { |
7ec30aaa MH |
1139 | int empty_entry_found = 0; |
1140 | ||
31171d9e | 1141 | string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); |
1b77d83c | 1142 | filter_string_list(&ceiling_dirs, 0, |
7ec30aaa | 1143 | canonicalize_ceiling_entry, &empty_entry_found); |
ce9b8aab | 1144 | ceil_offset = longest_ancestor_length(dir->buf, &ceiling_dirs); |
31171d9e MH |
1145 | string_list_clear(&ceiling_dirs, 0); |
1146 | } | |
1147 | ||
ce9b8aab JS |
1148 | if (ceil_offset < 0) |
1149 | ceil_offset = min_offset - 2; | |
d288a700 | 1150 | |
e2683d51 JS |
1151 | if (min_offset && min_offset == dir->len && |
1152 | !is_dir_sep(dir->buf[min_offset - 1])) { | |
1153 | strbuf_addch(dir, '/'); | |
1154 | min_offset++; | |
1155 | } | |
1156 | ||
892c41b9 | 1157 | /* |
ce9b8aab | 1158 | * Test in the following order (relative to the dir): |
b44ebb19 | 1159 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
1160 | * - .git/ |
1161 | * - ./ (bare) | |
b44ebb19 | 1162 | * - ../.git |
e90fdc39 JS |
1163 | * - ../.git/ |
1164 | * - ../ (bare) | |
176b2d32 | 1165 | * - ../../.git |
e90fdc39 | 1166 | * etc. |
892c41b9 | 1167 | */ |
cf87463e | 1168 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e | 1169 | if (one_filesystem) |
ce9b8aab | 1170 | current_device = get_device_or_die(dir->buf, NULL, 0); |
e90fdc39 | 1171 | for (;;) { |
01017dce | 1172 | int offset = dir->len, error_code = 0; |
ce9b8aab JS |
1173 | |
1174 | if (offset > min_offset) | |
1175 | strbuf_addch(dir, '/'); | |
1176 | strbuf_addstr(dir, DEFAULT_GIT_DIR_ENVIRONMENT); | |
01017dce JS |
1177 | gitdirenv = read_gitfile_gently(dir->buf, die_on_error ? |
1178 | NULL : &error_code); | |
1179 | if (!gitdirenv) { | |
1180 | if (die_on_error || | |
1181 | error_code == READ_GITFILE_ERR_NOT_A_FILE) { | |
5c4003ca | 1182 | /* NEEDSWORK: fail if .git is not file nor dir */ |
01017dce JS |
1183 | if (is_git_directory(dir->buf)) |
1184 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
1185 | } else if (error_code != READ_GITFILE_ERR_STAT_FAILED) | |
1186 | return GIT_DIR_INVALID_GITFILE; | |
9951d3b3 | 1187 | } |
ce9b8aab | 1188 | strbuf_setlen(dir, offset); |
9951d3b3 | 1189 | if (gitdirenv) { |
ce9b8aab JS |
1190 | strbuf_addstr(gitdir, gitdirenv); |
1191 | return GIT_DIR_DISCOVERED; | |
9951d3b3 | 1192 | } |
9951d3b3 | 1193 | |
ce9b8aab JS |
1194 | if (is_git_directory(dir->buf)) { |
1195 | strbuf_addstr(gitdir, "."); | |
1196 | return GIT_DIR_BARE; | |
502ffe34 | 1197 | } |
9951d3b3 | 1198 | |
ce9b8aab JS |
1199 | if (offset <= min_offset) |
1200 | return GIT_DIR_HIT_CEILING; | |
1cd8031b | 1201 | |
ce9b8aab | 1202 | while (--offset > ceil_offset && !is_dir_sep(dir->buf[offset])) |
6c1e6544 | 1203 | ; /* continue */ |
ce9b8aab JS |
1204 | if (offset <= ceil_offset) |
1205 | return GIT_DIR_HIT_CEILING; | |
1206 | ||
1207 | strbuf_setlen(dir, offset > min_offset ? offset : min_offset); | |
1208 | if (one_filesystem && | |
1209 | current_device != get_device_or_die(dir->buf, NULL, offset)) | |
1210 | return GIT_DIR_HIT_MOUNT_POINT; | |
892c41b9 | 1211 | } |
d288a700 | 1212 | } |
5e7bfe25 | 1213 | |
d3fb71b3 BW |
1214 | int discover_git_directory(struct strbuf *commondir, |
1215 | struct strbuf *gitdir) | |
16ac8b8d JS |
1216 | { |
1217 | struct strbuf dir = STRBUF_INIT, err = STRBUF_INIT; | |
1218 | size_t gitdir_offset = gitdir->len, cwd_len; | |
d3fb71b3 | 1219 | size_t commondir_offset = commondir->len; |
e8805af1 | 1220 | struct repository_format candidate = REPOSITORY_FORMAT_INIT; |
16ac8b8d JS |
1221 | |
1222 | if (strbuf_getcwd(&dir)) | |
d3fb71b3 | 1223 | return -1; |
16ac8b8d JS |
1224 | |
1225 | cwd_len = dir.len; | |
01017dce | 1226 | if (setup_git_directory_gently_1(&dir, gitdir, 0) <= 0) { |
16ac8b8d | 1227 | strbuf_release(&dir); |
d3fb71b3 | 1228 | return -1; |
16ac8b8d JS |
1229 | } |
1230 | ||
1231 | /* | |
1232 | * The returned gitdir is relative to dir, and if dir does not reflect | |
1233 | * the current working directory, we simply make the gitdir absolute. | |
1234 | */ | |
1235 | if (dir.len < cwd_len && !is_absolute_path(gitdir->buf + gitdir_offset)) { | |
1236 | /* Avoid a trailing "/." */ | |
1237 | if (!strcmp(".", gitdir->buf + gitdir_offset)) | |
1238 | strbuf_setlen(gitdir, gitdir_offset); | |
1239 | else | |
1240 | strbuf_addch(&dir, '/'); | |
1241 | strbuf_insert(gitdir, gitdir_offset, dir.buf, dir.len); | |
1242 | } | |
1243 | ||
d3fb71b3 BW |
1244 | get_common_dir(commondir, gitdir->buf + gitdir_offset); |
1245 | ||
16ac8b8d | 1246 | strbuf_reset(&dir); |
d3fb71b3 | 1247 | strbuf_addf(&dir, "%s/config", commondir->buf + commondir_offset); |
16ac8b8d JS |
1248 | read_repository_format(&candidate, dir.buf); |
1249 | strbuf_release(&dir); | |
1250 | ||
1251 | if (verify_repository_format(&candidate, &err) < 0) { | |
1252 | warning("ignoring git dir '%s': %s", | |
1253 | gitdir->buf + gitdir_offset, err.buf); | |
1254 | strbuf_release(&err); | |
d3fb71b3 | 1255 | strbuf_setlen(commondir, commondir_offset); |
69743f9b | 1256 | strbuf_setlen(gitdir, gitdir_offset); |
e8805af1 | 1257 | clear_repository_format(&candidate); |
d3fb71b3 | 1258 | return -1; |
16ac8b8d JS |
1259 | } |
1260 | ||
ebaf3bcf JT |
1261 | /* take ownership of candidate.partial_clone */ |
1262 | the_repository->repository_format_partial_clone = | |
1263 | candidate.partial_clone; | |
1264 | candidate.partial_clone = NULL; | |
1265 | ||
e8805af1 | 1266 | clear_repository_format(&candidate); |
d3fb71b3 | 1267 | return 0; |
16ac8b8d JS |
1268 | } |
1269 | ||
a60645f9 NTND |
1270 | const char *setup_git_directory_gently(int *nongit_ok) |
1271 | { | |
ce9b8aab JS |
1272 | static struct strbuf cwd = STRBUF_INIT; |
1273 | struct strbuf dir = STRBUF_INIT, gitdir = STRBUF_INIT; | |
07098b81 | 1274 | const char *prefix = NULL; |
e8805af1 | 1275 | struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT; |
a60645f9 | 1276 | |
ce9b8aab JS |
1277 | /* |
1278 | * We may have read an incomplete configuration before | |
1279 | * setting-up the git directory. If so, clear the cache so | |
1280 | * that the next queries to the configuration reload complete | |
1281 | * configuration (including the per-repo config file that we | |
1282 | * ignored previously). | |
1283 | */ | |
1284 | git_config_clear(); | |
1285 | ||
1286 | /* | |
1287 | * Let's assume that we are in a git repository. | |
1288 | * If it turns out later that we are somewhere else, the value will be | |
1289 | * updated accordingly. | |
1290 | */ | |
1291 | if (nongit_ok) | |
1292 | *nongit_ok = 0; | |
1293 | ||
1294 | if (strbuf_getcwd(&cwd)) | |
1295 | die_errno(_("Unable to read current working directory")); | |
1296 | strbuf_addbuf(&dir, &cwd); | |
1297 | ||
01017dce | 1298 | switch (setup_git_directory_gently_1(&dir, &gitdir, 1)) { |
ce9b8aab | 1299 | case GIT_DIR_EXPLICIT: |
abade65b | 1300 | prefix = setup_explicit_git_dir(gitdir.buf, &cwd, &repo_fmt, nongit_ok); |
ce9b8aab JS |
1301 | break; |
1302 | case GIT_DIR_DISCOVERED: | |
1303 | if (dir.len < cwd.len && chdir(dir.buf)) | |
fc045fe7 | 1304 | die(_("cannot change to '%s'"), dir.buf); |
ce9b8aab | 1305 | prefix = setup_discovered_git_dir(gitdir.buf, &cwd, dir.len, |
abade65b | 1306 | &repo_fmt, nongit_ok); |
ce9b8aab JS |
1307 | break; |
1308 | case GIT_DIR_BARE: | |
1309 | if (dir.len < cwd.len && chdir(dir.buf)) | |
fc045fe7 | 1310 | die(_("cannot change to '%s'"), dir.buf); |
abade65b | 1311 | prefix = setup_bare_git_dir(&cwd, dir.len, &repo_fmt, nongit_ok); |
ce9b8aab JS |
1312 | break; |
1313 | case GIT_DIR_HIT_CEILING: | |
07098b81 ED |
1314 | if (!nongit_ok) |
1315 | die(_("not a git repository (or any of the parent directories): %s"), | |
1316 | DEFAULT_GIT_DIR_ENVIRONMENT); | |
1317 | *nongit_ok = 1; | |
ce9b8aab JS |
1318 | break; |
1319 | case GIT_DIR_HIT_MOUNT_POINT: | |
07098b81 ED |
1320 | if (!nongit_ok) |
1321 | die(_("not a git repository (or any parent up to mount point %s)\n" | |
1322 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."), | |
1323 | dir.buf); | |
1324 | *nongit_ok = 1; | |
1325 | break; | |
1326 | case GIT_DIR_NONE: | |
1327 | /* | |
1328 | * As a safeguard against setup_git_directory_gently_1 returning | |
1329 | * this value, fallthrough to BUG. Otherwise it is possible to | |
1330 | * set startup_info->have_repository to 1 when we did nothing to | |
1331 | * find a repository. | |
1332 | */ | |
ce9b8aab | 1333 | default: |
033abf97 | 1334 | BUG("unhandled setup_git_directory_1() result"); |
ce9b8aab JS |
1335 | } |
1336 | ||
07098b81 ED |
1337 | /* |
1338 | * At this point, nongit_ok is stable. If it is non-NULL and points | |
1339 | * to a non-zero value, then this means that we haven't found a | |
1340 | * repository and that the caller expects startup_info to reflect | |
1341 | * this. | |
1342 | * | |
1343 | * Regardless of the state of nongit_ok, startup_info->prefix and | |
1344 | * the GIT_PREFIX environment variable must always match. For details | |
1345 | * see Documentation/config/alias.txt. | |
1346 | */ | |
c7d0e610 | 1347 | if (nongit_ok && *nongit_ok) |
07098b81 | 1348 | startup_info->have_repository = 0; |
c7d0e610 | 1349 | else |
07098b81 | 1350 | startup_info->have_repository = 1; |
46c3cd44 | 1351 | |
73f192c9 BW |
1352 | /* |
1353 | * Not all paths through the setup code will call 'set_git_dir()' (which | |
1354 | * directly sets up the environment) so in order to guarantee that the | |
1355 | * environment is in a consistent state after setup, explicitly setup | |
1356 | * the environment if we have a repository. | |
1357 | * | |
1358 | * NEEDSWORK: currently we allow bogus GIT_DIR values to be set in some | |
1359 | * code paths so we also need to explicitly setup the environment if | |
1360 | * the user has set GIT_DIR. It may be beneficial to disallow bogus | |
1361 | * GIT_DIR values at some point in the future. | |
1362 | */ | |
07098b81 ED |
1363 | if (/* GIT_DIR_EXPLICIT, GIT_DIR_DISCOVERED, GIT_DIR_BARE */ |
1364 | startup_info->have_repository || | |
1365 | /* GIT_DIR_EXPLICIT */ | |
1366 | getenv(GIT_DIR_ENVIRONMENT)) { | |
c14c234f BW |
1367 | if (!the_repository->gitdir) { |
1368 | const char *gitdir = getenv(GIT_DIR_ENVIRONMENT); | |
1369 | if (!gitdir) | |
1370 | gitdir = DEFAULT_GIT_DIR_ENVIRONMENT; | |
357a03eb | 1371 | setup_git_env(gitdir); |
c14c234f | 1372 | } |
ebaf3bcf | 1373 | if (startup_info->have_repository) { |
78a67668 | 1374 | repo_set_hash_algo(the_repository, repo_fmt.hash_algo); |
ebaf3bcf JT |
1375 | /* take ownership of repo_fmt.partial_clone */ |
1376 | the_repository->repository_format_partial_clone = | |
1377 | repo_fmt.partial_clone; | |
1378 | repo_fmt.partial_clone = NULL; | |
1379 | } | |
c14c234f | 1380 | } |
c7d0e610 TB |
1381 | /* |
1382 | * Since precompose_string_if_needed() needs to look at | |
1383 | * the core.precomposeunicode configuration, this | |
1384 | * has to happen after the above block that finds | |
1385 | * out where the repository is, i.e. a preparation | |
1386 | * for calling git_config_get_bool(). | |
1387 | */ | |
1388 | if (prefix) { | |
1389 | prefix = precompose_string_if_needed(prefix); | |
1390 | startup_info->prefix = prefix; | |
1391 | setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1); | |
1392 | } else { | |
1393 | startup_info->prefix = NULL; | |
1394 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); | |
1395 | } | |
1396 | ||
e6f8861b | 1397 | setup_original_cwd(); |
73f192c9 | 1398 | |
ce9b8aab JS |
1399 | strbuf_release(&dir); |
1400 | strbuf_release(&gitdir); | |
e8805af1 | 1401 | clear_repository_format(&repo_fmt); |
ce9b8aab | 1402 | |
a60645f9 NTND |
1403 | return prefix; |
1404 | } | |
1405 | ||
94df2506 JH |
1406 | int git_config_perm(const char *var, const char *value) |
1407 | { | |
06cbe855 HO |
1408 | int i; |
1409 | char *endptr; | |
1410 | ||
1411 | if (value == NULL) | |
1412 | return PERM_GROUP; | |
1413 | ||
1414 | if (!strcmp(value, "umask")) | |
1415 | return PERM_UMASK; | |
1416 | if (!strcmp(value, "group")) | |
1417 | return PERM_GROUP; | |
1418 | if (!strcmp(value, "all") || | |
1419 | !strcmp(value, "world") || | |
1420 | !strcmp(value, "everybody")) | |
1421 | return PERM_EVERYBODY; | |
1422 | ||
1423 | /* Parse octal numbers */ | |
1424 | i = strtol(value, &endptr, 8); | |
1425 | ||
1426 | /* If not an octal number, maybe true/false? */ | |
1427 | if (*endptr != 0) | |
1428 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
1429 | ||
1430 | /* | |
1431 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 1432 | * a chmod value to restrict to. |
06cbe855 HO |
1433 | */ |
1434 | switch (i) { | |
1435 | case PERM_UMASK: /* 0 */ | |
1436 | return PERM_UMASK; | |
1437 | case OLD_PERM_GROUP: /* 1 */ | |
1438 | return PERM_GROUP; | |
1439 | case OLD_PERM_EVERYBODY: /* 2 */ | |
1440 | return PERM_EVERYBODY; | |
94df2506 | 1441 | } |
06cbe855 HO |
1442 | |
1443 | /* A filemode value was given: 0xxx */ | |
1444 | ||
1445 | if ((i & 0600) != 0600) | |
fc045fe7 | 1446 | die(_("problem with core.sharedRepository filemode value " |
06cbe855 | 1447 | "(0%.3o).\nThe owner of files must always have " |
2ff30e67 | 1448 | "read and write permissions."), i); |
06cbe855 HO |
1449 | |
1450 | /* | |
1451 | * Mask filemode value. Others can not get write permission. | |
1452 | * x flags for directories are handled separately. | |
1453 | */ | |
5a688fe4 | 1454 | return -(i & 0666); |
94df2506 JH |
1455 | } |
1456 | ||
cfe3917c | 1457 | void check_repository_format(struct repository_format *fmt) |
ab9cb76f | 1458 | { |
e8805af1 | 1459 | struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT; |
cfe3917c | 1460 | if (!fmt) |
1461 | fmt = &repo_fmt; | |
1462 | check_repository_format_gently(get_git_dir(), fmt, NULL); | |
f1c126bd | 1463 | startup_info->have_repository = 1; |
d553aceb | 1464 | repo_set_hash_algo(the_repository, fmt->hash_algo); |
ebaf3bcf JT |
1465 | the_repository->repository_format_partial_clone = |
1466 | xstrdup_or_null(fmt->partial_clone); | |
e8805af1 | 1467 | clear_repository_format(&repo_fmt); |
ab9cb76f JH |
1468 | } |
1469 | ||
e1e5ec86 CB |
1470 | /* |
1471 | * Returns the "prefix", a path to the current working directory | |
1472 | * relative to the work tree root, or NULL, if the current working | |
1473 | * directory is not a strict subdirectory of the work tree root. The | |
1474 | * prefix always ends with a '/' character. | |
1475 | */ | |
5e7bfe25 JH |
1476 | const char *setup_git_directory(void) |
1477 | { | |
b3f66fd3 | 1478 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 1479 | } |
abc06822 | 1480 | |
40d96325 | 1481 | const char *resolve_gitdir_gently(const char *suspect, int *return_error_code) |
abc06822 FG |
1482 | { |
1483 | if (is_git_directory(suspect)) | |
1484 | return suspect; | |
40d96325 | 1485 | return read_gitfile_gently(suspect, return_error_code); |
abc06822 | 1486 | } |
1d999ddd TR |
1487 | |
1488 | /* if any standard file descriptor is missing open it to /dev/null */ | |
1489 | void sanitize_stdfds(void) | |
1490 | { | |
d9a65b6c RS |
1491 | int fd = xopen("/dev/null", O_RDWR); |
1492 | while (fd < 2) | |
1493 | fd = xdup(fd); | |
1d999ddd TR |
1494 | if (fd > 2) |
1495 | close(fd); | |
1496 | } | |
de0957ce NTND |
1497 | |
1498 | int daemonize(void) | |
1499 | { | |
1500 | #ifdef NO_POSIX_GOODIES | |
1501 | errno = ENOSYS; | |
1502 | return -1; | |
1503 | #else | |
1504 | switch (fork()) { | |
1505 | case 0: | |
1506 | break; | |
1507 | case -1: | |
fc045fe7 | 1508 | die_errno(_("fork failed")); |
de0957ce NTND |
1509 | default: |
1510 | exit(0); | |
1511 | } | |
1512 | if (setsid() == -1) | |
fc045fe7 | 1513 | die_errno(_("setsid failed")); |
de0957ce NTND |
1514 | close(0); |
1515 | close(1); | |
1516 | close(2); | |
1517 | sanitize_stdfds(); | |
1518 | return 0; | |
1519 | #endif | |
1520 | } |