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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" |
8959555c | 8 | #include "quote.h" |
e90fdc39 JS |
9 | |
10 | static int inside_git_dir = -1; | |
11 | static int inside_work_tree = -1; | |
fada7674 | 12 | static int work_tree_config_is_bogus; |
d288a700 | 13 | |
46c3cd44 JK |
14 | static struct startup_info the_startup_info; |
15 | struct startup_info *startup_info = &the_startup_info; | |
e6f8861b | 16 | const char *tmp_original_cwd; |
46c3cd44 | 17 | |
ddc2a628 MEW |
18 | /* |
19 | * The input parameter must contain an absolute path, and it must already be | |
20 | * normalized. | |
21 | * | |
22 | * Find the part of an absolute path that lies inside the work tree by | |
23 | * dereferencing symlinks outside the work tree, for example: | |
24 | * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file | |
25 | * /dir/file (work tree is /) -> dir/file | |
26 | * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2 | |
27 | * /dir/repolink/file (repolink points to /dir/repo) -> file | |
28 | * /dir/repo (exactly equal to work tree) -> (empty string) | |
29 | */ | |
30 | static int abspath_part_inside_repo(char *path) | |
31 | { | |
32 | size_t len; | |
33 | size_t wtlen; | |
34 | char *path0; | |
35 | int off; | |
36 | const char *work_tree = get_git_work_tree(); | |
3d7747e3 | 37 | struct strbuf realpath = STRBUF_INIT; |
ddc2a628 MEW |
38 | |
39 | if (!work_tree) | |
40 | return -1; | |
41 | wtlen = strlen(work_tree); | |
42 | len = strlen(path); | |
6127ff63 | 43 | off = offset_1st_component(path); |
ddc2a628 MEW |
44 | |
45 | /* check if work tree is already the prefix */ | |
d8727b36 | 46 | if (wtlen <= len && !fspathncmp(path, work_tree, wtlen)) { |
ddc2a628 MEW |
47 | if (path[wtlen] == '/') { |
48 | memmove(path, path + wtlen + 1, len - wtlen); | |
49 | return 0; | |
50 | } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') { | |
51 | /* work tree is the root, or the whole path */ | |
52 | memmove(path, path + wtlen, len - wtlen + 1); | |
53 | return 0; | |
54 | } | |
55 | /* work tree might match beginning of a symlink to work tree */ | |
56 | off = wtlen; | |
57 | } | |
58 | path0 = path; | |
6127ff63 | 59 | path += off; |
ddc2a628 MEW |
60 | |
61 | /* check each '/'-terminated level */ | |
62 | while (*path) { | |
63 | path++; | |
64 | if (*path == '/') { | |
65 | *path = '\0'; | |
3d7747e3 AM |
66 | strbuf_realpath(&realpath, path0, 1); |
67 | if (fspathcmp(realpath.buf, work_tree) == 0) { | |
ddc2a628 | 68 | memmove(path0, path + 1, len - (path - path0)); |
3d7747e3 | 69 | strbuf_release(&realpath); |
ddc2a628 MEW |
70 | return 0; |
71 | } | |
72 | *path = '/'; | |
73 | } | |
74 | } | |
75 | ||
76 | /* check whole path */ | |
3d7747e3 AM |
77 | strbuf_realpath(&realpath, path0, 1); |
78 | if (fspathcmp(realpath.buf, work_tree) == 0) { | |
ddc2a628 | 79 | *path0 = '\0'; |
3d7747e3 | 80 | strbuf_release(&realpath); |
ddc2a628 MEW |
81 | return 0; |
82 | } | |
83 | ||
3d7747e3 | 84 | strbuf_release(&realpath); |
ddc2a628 MEW |
85 | return -1; |
86 | } | |
87 | ||
645a29c4 NTND |
88 | /* |
89 | * Normalize "path", prepending the "prefix" for relative paths. If | |
90 | * remaining_prefix is not NULL, return the actual prefix still | |
91 | * remains in the path. For example, prefix = sub1/sub2/ and path is | |
92 | * | |
93 | * foo -> sub1/sub2/foo (full prefix) | |
94 | * ../foo -> sub1/foo (remaining prefix is sub1/) | |
95 | * ../../bar -> bar (no remaining prefix) | |
96 | * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix) | |
97 | * `pwd`/../bar -> sub1/bar (no remaining prefix) | |
98 | */ | |
99 | char *prefix_path_gently(const char *prefix, int len, | |
100 | int *remaining_prefix, const char *path) | |
d089ebaa JH |
101 | { |
102 | const char *orig = path; | |
18e051a3 CMAB |
103 | char *sanitized; |
104 | if (is_absolute_path(orig)) { | |
3733e694 | 105 | sanitized = xmallocz(strlen(path)); |
645a29c4 NTND |
106 | if (remaining_prefix) |
107 | *remaining_prefix = 0; | |
655ee9ea MEW |
108 | if (normalize_path_copy_len(sanitized, path, remaining_prefix)) { |
109 | free(sanitized); | |
110 | return NULL; | |
111 | } | |
112 | if (abspath_part_inside_repo(sanitized)) { | |
113 | free(sanitized); | |
114 | return NULL; | |
115 | } | |
18e051a3 | 116 | } else { |
24041d6b | 117 | sanitized = xstrfmt("%.*s%s", len, len ? prefix : "", path); |
645a29c4 NTND |
118 | if (remaining_prefix) |
119 | *remaining_prefix = len; | |
655ee9ea | 120 | if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) { |
546e0fd9 JK |
121 | free(sanitized); |
122 | return NULL; | |
d089ebaa | 123 | } |
d089ebaa JH |
124 | } |
125 | return sanitized; | |
f332726e LT |
126 | } |
127 | ||
546e0fd9 JK |
128 | char *prefix_path(const char *prefix, int len, const char *path) |
129 | { | |
645a29c4 | 130 | char *r = prefix_path_gently(prefix, len, NULL, path); |
5c203986 ES |
131 | if (!r) { |
132 | const char *hint_path = get_git_work_tree(); | |
133 | if (!hint_path) | |
134 | hint_path = get_git_dir(); | |
e0020b2f | 135 | die(_("'%s' is outside repository at '%s'"), path, |
5c203986 ES |
136 | absolute_path(hint_path)); |
137 | } | |
546e0fd9 JK |
138 | return r; |
139 | } | |
140 | ||
141 | int path_inside_repo(const char *prefix, const char *path) | |
142 | { | |
143 | int len = prefix ? strlen(prefix) : 0; | |
645a29c4 | 144 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
145 | if (r) { |
146 | free(r); | |
147 | return 1; | |
148 | } | |
149 | return 0; | |
150 | } | |
151 | ||
c6e8c800 JH |
152 | int check_filename(const char *prefix, const char *arg) |
153 | { | |
e4da43b1 | 154 | char *to_free = NULL; |
c6e8c800 JH |
155 | struct stat st; |
156 | ||
d51c6ee0 JK |
157 | if (skip_prefix(arg, ":/", &arg)) { |
158 | if (!*arg) /* ":/" is root dir, always exists */ | |
4db86e8b | 159 | return 1; |
a08cbcda | 160 | prefix = NULL; |
42471bce JK |
161 | } else if (skip_prefix(arg, ":!", &arg) || |
162 | skip_prefix(arg, ":^", &arg)) { | |
163 | if (!*arg) /* excluding everything is silly, but allowed */ | |
164 | return 1; | |
a08cbcda JK |
165 | } |
166 | ||
167 | if (prefix) | |
168 | arg = to_free = prefix_filename(prefix, arg); | |
169 | ||
170 | if (!lstat(arg, &st)) { | |
e4da43b1 | 171 | free(to_free); |
c6e8c800 | 172 | return 1; /* file exists */ |
e4da43b1 | 173 | } |
93dd544f | 174 | if (is_missing_file_error(errno)) { |
e4da43b1 | 175 | free(to_free); |
c6e8c800 | 176 | return 0; /* file does not exist */ |
e4da43b1 | 177 | } |
fc045fe7 | 178 | die_errno(_("failed to stat '%s'"), arg); |
c6e8c800 JH |
179 | } |
180 | ||
e270f42c NTND |
181 | static void NORETURN die_verify_filename(struct repository *r, |
182 | const char *prefix, | |
023e37c3 MM |
183 | const char *arg, |
184 | int diagnose_misspelt_rev) | |
009fee47 | 185 | { |
023e37c3 | 186 | if (!diagnose_misspelt_rev) |
ab33a76e VA |
187 | die(_("%s: no such path in the working tree.\n" |
188 | "Use 'git <command> -- <path>...' to specify paths that do not exist locally."), | |
023e37c3 | 189 | arg); |
0e539dca JH |
190 | /* |
191 | * Saying "'(icase)foo' does not exist in the index" when the | |
192 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
193 | * begins with a colon and is followed by a non-alnum; do not | |
8c135ea2 | 194 | * let maybe_die_on_misspelt_object_name() even trigger. |
0e539dca JH |
195 | */ |
196 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
e270f42c | 197 | maybe_die_on_misspelt_object_name(r, arg, prefix); |
0e539dca | 198 | |
009fee47 | 199 | /* ... or fall back the most general message. */ |
ab33a76e VA |
200 | die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n" |
201 | "Use '--' to separate paths from revisions, like this:\n" | |
202 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
009fee47 MM |
203 | |
204 | } | |
205 | ||
c99eddd8 JK |
206 | /* |
207 | * Check for arguments that don't resolve as actual files, | |
208 | * but which look sufficiently like pathspecs that we'll consider | |
209 | * them such for the purposes of rev/pathspec DWIM parsing. | |
210 | */ | |
211 | static int looks_like_pathspec(const char *arg) | |
212 | { | |
39e21c6e JK |
213 | const char *p; |
214 | int escaped = 0; | |
215 | ||
216 | /* | |
217 | * Wildcard characters imply the user is looking to match pathspecs | |
218 | * that aren't in the filesystem. Note that this doesn't include | |
219 | * backslash even though it's a glob special; by itself it doesn't | |
220 | * cause any increase in the match. Likewise ignore backslash-escaped | |
221 | * wildcard characters. | |
222 | */ | |
223 | for (p = arg; *p; p++) { | |
224 | if (escaped) { | |
225 | escaped = 0; | |
226 | } else if (is_glob_special(*p)) { | |
227 | if (*p == '\\') | |
228 | escaped = 1; | |
229 | else | |
230 | return 1; | |
231 | } | |
232 | } | |
c99eddd8 JK |
233 | |
234 | /* long-form pathspec magic */ | |
235 | if (starts_with(arg, ":(")) | |
236 | return 1; | |
237 | ||
238 | return 0; | |
239 | } | |
240 | ||
e23d0b4a LT |
241 | /* |
242 | * Verify a filename that we got as an argument for a pathspec | |
243 | * entry. Note that a filename that begins with "-" never verifies | |
244 | * as true, because even if such a filename were to exist, we want | |
245 | * it to be preceded by the "--" marker (or we want the user to | |
246 | * use a format like "./-filename") | |
023e37c3 MM |
247 | * |
248 | * The "diagnose_misspelt_rev" is used to provide a user-friendly | |
249 | * diagnosis when dying upon finding that "name" is not a pathname. | |
250 | * If set to 1, the diagnosis will try to diagnose "name" as an | |
251 | * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis | |
252 | * will only complain about an inexisting file. | |
253 | * | |
254 | * This function is typically called to check that a "file or rev" | |
255 | * argument is unambiguous. In this case, the caller will want | |
256 | * diagnose_misspelt_rev == 1 when verifying the first non-rev | |
257 | * argument (which could have been a revision), and | |
258 | * diagnose_misspelt_rev == 0 for the next ones (because we already | |
259 | * saw a filename, there's not ambiguity anymore). | |
e23d0b4a | 260 | */ |
023e37c3 MM |
261 | void verify_filename(const char *prefix, |
262 | const char *arg, | |
263 | int diagnose_misspelt_rev) | |
e23d0b4a | 264 | { |
e23d0b4a | 265 | if (*arg == '-') |
fc045fe7 | 266 | die(_("option '%s' must come before non-option arguments"), arg); |
2cb47ab6 | 267 | if (looks_like_pathspec(arg) || check_filename(prefix, arg)) |
e23d0b4a | 268 | return; |
e270f42c | 269 | die_verify_filename(the_repository, prefix, arg, diagnose_misspelt_rev); |
e23d0b4a LT |
270 | } |
271 | ||
ea92f41f JH |
272 | /* |
273 | * Opposite of the above: the command line did not have -- marker | |
274 | * and we parsed the arg as a refname. It should not be interpretable | |
275 | * as a filename. | |
276 | */ | |
277 | void verify_non_filename(const char *prefix, const char *arg) | |
278 | { | |
7ae3df8c | 279 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 280 | return; |
ea92f41f JH |
281 | if (*arg == '-') |
282 | return; /* flag */ | |
c6e8c800 JH |
283 | if (!check_filename(prefix, arg)) |
284 | return; | |
ab33a76e VA |
285 | die(_("ambiguous argument '%s': both revision and filename\n" |
286 | "Use '--' to separate paths from revisions, like this:\n" | |
287 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
ea92f41f JH |
288 | } |
289 | ||
31e26ebc | 290 | int get_common_dir(struct strbuf *sb, const char *gitdir) |
11f9dd71 MK |
291 | { |
292 | const char *git_env_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT); | |
293 | if (git_env_common_dir) { | |
294 | strbuf_addstr(sb, git_env_common_dir); | |
295 | return 1; | |
296 | } else { | |
297 | return get_common_dir_noenv(sb, gitdir); | |
298 | } | |
299 | } | |
300 | ||
301 | int get_common_dir_noenv(struct strbuf *sb, const char *gitdir) | |
4dc4e145 NTND |
302 | { |
303 | struct strbuf data = STRBUF_INIT; | |
304 | struct strbuf path = STRBUF_INIT; | |
31e26ebc | 305 | int ret = 0; |
11f9dd71 | 306 | |
4dc4e145 NTND |
307 | strbuf_addf(&path, "%s/commondir", gitdir); |
308 | if (file_exists(path.buf)) { | |
309 | if (strbuf_read_file(&data, path.buf, 0) <= 0) | |
310 | die_errno(_("failed to read %s"), path.buf); | |
311 | while (data.len && (data.buf[data.len - 1] == '\n' || | |
312 | data.buf[data.len - 1] == '\r')) | |
313 | data.len--; | |
314 | data.buf[data.len] = '\0'; | |
315 | strbuf_reset(&path); | |
316 | if (!is_absolute_path(data.buf)) | |
317 | strbuf_addf(&path, "%s/", gitdir); | |
318 | strbuf_addbuf(&path, &data); | |
33ad9ddd | 319 | strbuf_add_real_path(sb, path.buf); |
31e26ebc | 320 | ret = 1; |
4ac9006f | 321 | } else { |
4dc4e145 | 322 | strbuf_addstr(sb, gitdir); |
4ac9006f BW |
323 | } |
324 | ||
4dc4e145 NTND |
325 | strbuf_release(&data); |
326 | strbuf_release(&path); | |
31e26ebc | 327 | return ret; |
4dc4e145 | 328 | } |
d288a700 | 329 | |
5f5608bc | 330 | /* |
ad1a382f | 331 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 332 | * We want to see: |
5f5608bc | 333 | * |
790296fd | 334 | * - either an objects/ directory _or_ the proper |
5f5608bc | 335 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 336 | * - a refs/ directory |
8098a178 | 337 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
338 | * a proper "ref:", or a regular file HEAD that has a properly |
339 | * formatted sha1 object name. | |
5f5608bc | 340 | */ |
b3256eb8 | 341 | int is_git_directory(const char *suspect) |
5f5608bc | 342 | { |
1d186b6f NTND |
343 | struct strbuf path = STRBUF_INIT; |
344 | int ret = 0; | |
345 | size_t len; | |
ad1a382f | 346 | |
4dc4e145 | 347 | /* Check worktree-related signatures */ |
fa4d8c78 JK |
348 | strbuf_addstr(&path, suspect); |
349 | strbuf_complete(&path, '/'); | |
350 | strbuf_addstr(&path, "HEAD"); | |
4dc4e145 NTND |
351 | if (validate_headref(path.buf)) |
352 | goto done; | |
353 | ||
354 | strbuf_reset(&path); | |
355 | get_common_dir(&path, suspect); | |
1d186b6f | 356 | len = path.len; |
4dc4e145 NTND |
357 | |
358 | /* Check non-worktree-related signatures */ | |
ad1a382f SP |
359 | if (getenv(DB_ENVIRONMENT)) { |
360 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
1d186b6f | 361 | goto done; |
ad1a382f SP |
362 | } |
363 | else { | |
4dc4e145 | 364 | strbuf_setlen(&path, len); |
1d186b6f NTND |
365 | strbuf_addstr(&path, "/objects"); |
366 | if (access(path.buf, X_OK)) | |
367 | goto done; | |
ad1a382f SP |
368 | } |
369 | ||
1d186b6f NTND |
370 | strbuf_setlen(&path, len); |
371 | strbuf_addstr(&path, "/refs"); | |
372 | if (access(path.buf, X_OK)) | |
373 | goto done; | |
ad1a382f | 374 | |
1d186b6f NTND |
375 | ret = 1; |
376 | done: | |
377 | strbuf_release(&path); | |
378 | return ret; | |
5f5608bc LT |
379 | } |
380 | ||
ffd036b1 JK |
381 | int is_nonbare_repository_dir(struct strbuf *path) |
382 | { | |
383 | int ret = 0; | |
384 | int gitfile_error; | |
385 | size_t orig_path_len = path->len; | |
386 | assert(orig_path_len != 0); | |
387 | strbuf_complete(path, '/'); | |
388 | strbuf_addstr(path, ".git"); | |
389 | if (read_gitfile_gently(path->buf, &gitfile_error) || is_git_directory(path->buf)) | |
390 | ret = 1; | |
391 | if (gitfile_error == READ_GITFILE_ERR_OPEN_FAILED || | |
392 | gitfile_error == READ_GITFILE_ERR_READ_FAILED) | |
393 | ret = 1; | |
394 | strbuf_setlen(path, orig_path_len); | |
395 | return ret; | |
396 | } | |
397 | ||
68025633 JS |
398 | int is_inside_git_dir(void) |
399 | { | |
e90fdc39 JS |
400 | if (inside_git_dir < 0) |
401 | inside_git_dir = is_inside_dir(get_git_dir()); | |
402 | return inside_git_dir; | |
892c41b9 ML |
403 | } |
404 | ||
892c41b9 ML |
405 | int is_inside_work_tree(void) |
406 | { | |
e90fdc39 JS |
407 | if (inside_work_tree < 0) |
408 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
409 | return inside_work_tree; | |
892c41b9 ML |
410 | } |
411 | ||
f3fa1838 JH |
412 | void setup_work_tree(void) |
413 | { | |
8500e0de | 414 | const char *work_tree; |
354e6534 JS |
415 | static int initialized = 0; |
416 | ||
417 | if (initialized) | |
418 | return; | |
fada7674 JK |
419 | |
420 | if (work_tree_config_is_bogus) | |
fc045fe7 | 421 | die(_("unable to set up work tree using invalid config")); |
fada7674 | 422 | |
354e6534 | 423 | work_tree = get_git_work_tree(); |
8500e0de | 424 | if (!work_tree || chdir_notify(work_tree)) |
fc045fe7 | 425 | die(_("this operation must be run in a work tree")); |
0ed74813 NTND |
426 | |
427 | /* | |
428 | * Make sure subsequent git processes find correct worktree | |
429 | * if $GIT_WORK_TREE is set relative | |
430 | */ | |
431 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
432 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
433 | ||
354e6534 | 434 | initialized = 1; |
59f0f2f3 MH |
435 | } |
436 | ||
e6f8861b EN |
437 | static void setup_original_cwd(void) |
438 | { | |
439 | struct strbuf tmp = STRBUF_INIT; | |
440 | const char *worktree = NULL; | |
441 | int offset = -1; | |
442 | ||
443 | if (!tmp_original_cwd) | |
444 | return; | |
445 | ||
446 | /* | |
447 | * startup_info->original_cwd points to the current working | |
448 | * directory we inherited from our parent process, which is a | |
449 | * directory we want to avoid removing. | |
450 | * | |
451 | * For convience, we would like to have the path relative to the | |
452 | * worktree instead of an absolute path. | |
453 | * | |
454 | * Yes, startup_info->original_cwd is usually the same as 'prefix', | |
455 | * but differs in two ways: | |
456 | * - prefix has a trailing '/' | |
457 | * - if the user passes '-C' to git, that modifies the prefix but | |
458 | * not startup_info->original_cwd. | |
459 | */ | |
460 | ||
461 | /* Normalize the directory */ | |
c37c6dc6 KL |
462 | if (!strbuf_realpath(&tmp, tmp_original_cwd, 0)) { |
463 | trace2_data_string("setup", the_repository, | |
464 | "realpath-path", tmp_original_cwd); | |
465 | trace2_data_string("setup", the_repository, | |
466 | "realpath-failure", strerror(errno)); | |
467 | free((char*)tmp_original_cwd); | |
468 | tmp_original_cwd = NULL; | |
469 | return; | |
470 | } | |
471 | ||
e6f8861b EN |
472 | free((char*)tmp_original_cwd); |
473 | tmp_original_cwd = NULL; | |
474 | startup_info->original_cwd = strbuf_detach(&tmp, NULL); | |
475 | ||
476 | /* | |
477 | * Get our worktree; we only protect the current working directory | |
478 | * if it's in the worktree. | |
479 | */ | |
480 | worktree = get_git_work_tree(); | |
481 | if (!worktree) | |
482 | goto no_prevention_needed; | |
483 | ||
484 | offset = dir_inside_of(startup_info->original_cwd, worktree); | |
485 | if (offset >= 0) { | |
486 | /* | |
487 | * If startup_info->original_cwd == worktree, that is already | |
488 | * protected and we don't need original_cwd as a secondary | |
489 | * protection measure. | |
490 | */ | |
491 | if (!*(startup_info->original_cwd + offset)) | |
492 | goto no_prevention_needed; | |
493 | ||
494 | /* | |
495 | * original_cwd was inside worktree; precompose it just as | |
496 | * we do prefix so that built up paths will match | |
497 | */ | |
498 | startup_info->original_cwd = \ | |
499 | precompose_string_if_needed(startup_info->original_cwd | |
500 | + offset); | |
501 | return; | |
502 | } | |
503 | ||
504 | no_prevention_needed: | |
505 | free((char*)startup_info->original_cwd); | |
506 | startup_info->original_cwd = NULL; | |
507 | } | |
508 | ||
58b284a2 NTND |
509 | static int read_worktree_config(const char *var, const char *value, void *vdata) |
510 | { | |
511 | struct repository_format *data = vdata; | |
512 | ||
513 | if (strcmp(var, "core.bare") == 0) { | |
514 | data->is_bare = git_config_bool(var, value); | |
515 | } else if (strcmp(var, "core.worktree") == 0) { | |
516 | if (!value) | |
517 | return config_error_nonbool(var); | |
13019979 | 518 | free(data->work_tree); |
58b284a2 NTND |
519 | data->work_tree = xstrdup(value); |
520 | } | |
521 | return 0; | |
522 | } | |
523 | ||
ec91ffca JK |
524 | enum extension_result { |
525 | EXTENSION_ERROR = -1, /* compatible with error(), etc */ | |
526 | EXTENSION_UNKNOWN = 0, | |
527 | EXTENSION_OK = 1 | |
528 | }; | |
529 | ||
530 | /* | |
531 | * Do not add new extensions to this function. It handles extensions which are | |
532 | * respected even in v0-format repositories for historical compatibility. | |
533 | */ | |
534 | static enum extension_result handle_extension_v0(const char *var, | |
535 | const char *value, | |
536 | const char *ext, | |
537 | struct repository_format *data) | |
538 | { | |
539 | if (!strcmp(ext, "noop")) { | |
540 | return EXTENSION_OK; | |
541 | } else if (!strcmp(ext, "preciousobjects")) { | |
542 | data->precious_objects = git_config_bool(var, value); | |
543 | return EXTENSION_OK; | |
544 | } else if (!strcmp(ext, "partialclone")) { | |
ec91ffca JK |
545 | data->partial_clone = xstrdup(value); |
546 | return EXTENSION_OK; | |
547 | } else if (!strcmp(ext, "worktreeconfig")) { | |
548 | data->worktree_config = git_config_bool(var, value); | |
549 | return EXTENSION_OK; | |
550 | } | |
551 | ||
552 | return EXTENSION_UNKNOWN; | |
553 | } | |
554 | ||
555 | /* | |
556 | * Record any new extensions in this function. | |
557 | */ | |
558 | static enum extension_result handle_extension(const char *var, | |
559 | const char *value, | |
560 | const char *ext, | |
561 | struct repository_format *data) | |
562 | { | |
563 | if (!strcmp(ext, "noop-v1")) { | |
564 | return EXTENSION_OK; | |
e0ad9574 JH |
565 | } else if (!strcmp(ext, "objectformat")) { |
566 | int format; | |
ec91ffca | 567 | |
e0ad9574 JH |
568 | if (!value) |
569 | return config_error_nonbool(var); | |
570 | format = hash_algo_by_name(value); | |
571 | if (format == GIT_HASH_UNKNOWN) | |
1a8aea85 JNA |
572 | return error(_("invalid value for '%s': '%s'"), |
573 | "extensions.objectformat", value); | |
e0ad9574 JH |
574 | data->hash_algo = format; |
575 | return EXTENSION_OK; | |
576 | } | |
ec91ffca JK |
577 | return EXTENSION_UNKNOWN; |
578 | } | |
579 | ||
2cc7c2c7 | 580 | static int check_repo_format(const char *var, const char *value, void *vdata) |
31e26ebc | 581 | { |
2cc7c2c7 | 582 | struct repository_format *data = vdata; |
00a09d57 JK |
583 | const char *ext; |
584 | ||
31e26ebc | 585 | if (strcmp(var, "core.repositoryformatversion") == 0) |
2cc7c2c7 | 586 | data->version = git_config_int(var, value); |
00a09d57 | 587 | else if (skip_prefix(var, "extensions.", &ext)) { |
ec91ffca JK |
588 | switch (handle_extension_v0(var, value, ext, data)) { |
589 | case EXTENSION_ERROR: | |
590 | return -1; | |
591 | case EXTENSION_OK: | |
592 | return 0; | |
593 | case EXTENSION_UNKNOWN: | |
594 | break; | |
595 | } | |
596 | ||
597 | switch (handle_extension(var, value, ext, data)) { | |
598 | case EXTENSION_ERROR: | |
599 | return -1; | |
600 | case EXTENSION_OK: | |
601 | string_list_append(&data->v1_only_extensions, ext); | |
602 | return 0; | |
603 | case EXTENSION_UNKNOWN: | |
2cc7c2c7 | 604 | string_list_append(&data->unknown_extensions, ext); |
ec91ffca JK |
605 | return 0; |
606 | } | |
00a09d57 | 607 | } |
58b284a2 NTND |
608 | |
609 | return read_worktree_config(var, value, vdata); | |
31e26ebc NTND |
610 | } |
611 | ||
abade65b | 612 | static int check_repository_format_gently(const char *gitdir, struct repository_format *candidate, int *nongit_ok) |
9459aa77 | 613 | { |
7d0fb0da | 614 | struct strbuf sb = STRBUF_INIT; |
2cc7c2c7 | 615 | struct strbuf err = STRBUF_INIT; |
652f18ee | 616 | int has_common; |
00a09d57 | 617 | |
652f18ee | 618 | has_common = get_common_dir(&sb, gitdir); |
e61a509a | 619 | strbuf_addstr(&sb, "/config"); |
abade65b | 620 | read_repository_format(candidate, sb.buf); |
2cc7c2c7 | 621 | strbuf_release(&sb); |
e61a509a | 622 | |
337e51ce | 623 | /* |
2cc7c2c7 JK |
624 | * For historical use of check_repository_format() in git-init, |
625 | * we treat a missing config as a silent "ok", even when nongit_ok | |
626 | * is unset. | |
337e51ce | 627 | */ |
abade65b | 628 | if (candidate->version < 0) |
2cc7c2c7 JK |
629 | return 0; |
630 | ||
abade65b | 631 | if (verify_repository_format(candidate, &err) < 0) { |
2cc7c2c7 JK |
632 | if (nongit_ok) { |
633 | warning("%s", err.buf); | |
634 | strbuf_release(&err); | |
635 | *nongit_ok = -1; | |
636 | return -1; | |
637 | } | |
638 | die("%s", err.buf); | |
639 | } | |
640 | ||
11664196 | 641 | repository_format_precious_objects = candidate->precious_objects; |
11664196 | 642 | repository_format_worktree_config = candidate->worktree_config; |
abade65b | 643 | string_list_clear(&candidate->unknown_extensions, 0); |
ec91ffca | 644 | string_list_clear(&candidate->v1_only_extensions, 0); |
58b284a2 NTND |
645 | |
646 | if (repository_format_worktree_config) { | |
647 | /* | |
648 | * pick up core.bare and core.worktree from per-worktree | |
649 | * config if present | |
650 | */ | |
651 | strbuf_addf(&sb, "%s/config.worktree", gitdir); | |
652 | git_config_from_file(read_worktree_config, sb.buf, candidate); | |
653 | strbuf_release(&sb); | |
654 | has_common = 0; | |
655 | } | |
656 | ||
652f18ee | 657 | if (!has_common) { |
abade65b | 658 | if (candidate->is_bare != -1) { |
659 | is_bare_repository_cfg = candidate->is_bare; | |
652f18ee JK |
660 | if (is_bare_repository_cfg == 1) |
661 | inside_work_tree = -1; | |
662 | } | |
abade65b | 663 | if (candidate->work_tree) { |
652f18ee | 664 | free(git_work_tree_cfg); |
e8805af1 | 665 | git_work_tree_cfg = xstrdup(candidate->work_tree); |
2cc7c2c7 | 666 | inside_work_tree = -1; |
652f18ee | 667 | } |
2cc7c2c7 JK |
668 | } |
669 | ||
670 | return 0; | |
671 | } | |
672 | ||
16af5f1a XL |
673 | int upgrade_repository_format(int target_version) |
674 | { | |
675 | struct strbuf sb = STRBUF_INIT; | |
676 | struct strbuf err = STRBUF_INIT; | |
677 | struct strbuf repo_version = STRBUF_INIT; | |
678 | struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT; | |
679 | ||
680 | strbuf_git_common_path(&sb, the_repository, "config"); | |
681 | read_repository_format(&repo_fmt, sb.buf); | |
682 | strbuf_release(&sb); | |
683 | ||
684 | if (repo_fmt.version >= target_version) | |
685 | return 0; | |
686 | ||
62f2eca6 JN |
687 | if (verify_repository_format(&repo_fmt, &err) < 0) { |
688 | error("cannot upgrade repository format from %d to %d: %s", | |
689 | repo_fmt.version, target_version, err.buf); | |
16af5f1a XL |
690 | strbuf_release(&err); |
691 | return -1; | |
692 | } | |
62f2eca6 JN |
693 | if (!repo_fmt.version && repo_fmt.unknown_extensions.nr) |
694 | return error("cannot upgrade repository format: " | |
695 | "unknown extension %s", | |
696 | repo_fmt.unknown_extensions.items[0].string); | |
16af5f1a XL |
697 | |
698 | strbuf_addf(&repo_version, "%d", target_version); | |
699 | git_config_set("core.repositoryformatversion", repo_version.buf); | |
700 | strbuf_release(&repo_version); | |
701 | return 1; | |
702 | } | |
703 | ||
e8805af1 MÅ |
704 | static void init_repository_format(struct repository_format *format) |
705 | { | |
706 | const struct repository_format fresh = REPOSITORY_FORMAT_INIT; | |
707 | ||
708 | memcpy(format, &fresh, sizeof(fresh)); | |
709 | } | |
710 | ||
652f18ee | 711 | int read_repository_format(struct repository_format *format, const char *path) |
2cc7c2c7 | 712 | { |
e8805af1 | 713 | clear_repository_format(format); |
652f18ee | 714 | git_config_from_file(check_repo_format, path, format); |
e8805af1 MÅ |
715 | if (format->version == -1) |
716 | clear_repository_format(format); | |
2cc7c2c7 JK |
717 | return format->version; |
718 | } | |
719 | ||
e8805af1 MÅ |
720 | void clear_repository_format(struct repository_format *format) |
721 | { | |
722 | string_list_clear(&format->unknown_extensions, 0); | |
ec91ffca | 723 | string_list_clear(&format->v1_only_extensions, 0); |
e8805af1 MÅ |
724 | free(format->work_tree); |
725 | free(format->partial_clone); | |
726 | init_repository_format(format); | |
727 | } | |
728 | ||
2cc7c2c7 JK |
729 | int verify_repository_format(const struct repository_format *format, |
730 | struct strbuf *err) | |
731 | { | |
732 | if (GIT_REPO_VERSION_READ < format->version) { | |
274db840 | 733 | strbuf_addf(err, _("Expected git repo version <= %d, found %d"), |
2cc7c2c7 JK |
734 | GIT_REPO_VERSION_READ, format->version); |
735 | return -1; | |
736 | } | |
737 | ||
738 | if (format->version >= 1 && format->unknown_extensions.nr) { | |
00a09d57 JK |
739 | int i; |
740 | ||
8013d7d9 AH |
741 | strbuf_addstr(err, Q_("unknown repository extension found:", |
742 | "unknown repository extensions found:", | |
743 | format->unknown_extensions.nr)); | |
00a09d57 | 744 | |
2cc7c2c7 JK |
745 | for (i = 0; i < format->unknown_extensions.nr; i++) |
746 | strbuf_addf(err, "\n\t%s", | |
747 | format->unknown_extensions.items[i].string); | |
748 | return -1; | |
00a09d57 JK |
749 | } |
750 | ||
ec91ffca JK |
751 | if (format->version == 0 && format->v1_only_extensions.nr) { |
752 | int i; | |
753 | ||
754 | strbuf_addstr(err, | |
8013d7d9 AH |
755 | Q_("repo version is 0, but v1-only extension found:", |
756 | "repo version is 0, but v1-only extensions found:", | |
757 | format->v1_only_extensions.nr)); | |
ec91ffca JK |
758 | |
759 | for (i = 0; i < format->v1_only_extensions.nr; i++) | |
760 | strbuf_addf(err, "\n\t%s", | |
761 | format->v1_only_extensions.items[i].string); | |
762 | return -1; | |
763 | } | |
764 | ||
2cc7c2c7 | 765 | return 0; |
9459aa77 NTND |
766 | } |
767 | ||
5f29433f SB |
768 | void read_gitfile_error_die(int error_code, const char *path, const char *dir) |
769 | { | |
770 | switch (error_code) { | |
771 | case READ_GITFILE_ERR_STAT_FAILED: | |
772 | case READ_GITFILE_ERR_NOT_A_FILE: | |
773 | /* non-fatal; follow return path */ | |
774 | break; | |
775 | case READ_GITFILE_ERR_OPEN_FAILED: | |
fc045fe7 | 776 | die_errno(_("error opening '%s'"), path); |
5f29433f | 777 | case READ_GITFILE_ERR_TOO_LARGE: |
fc045fe7 | 778 | die(_("too large to be a .git file: '%s'"), path); |
5f29433f | 779 | case READ_GITFILE_ERR_READ_FAILED: |
fc045fe7 | 780 | die(_("error reading %s"), path); |
5f29433f | 781 | case READ_GITFILE_ERR_INVALID_FORMAT: |
fc045fe7 | 782 | die(_("invalid gitfile format: %s"), path); |
5f29433f | 783 | case READ_GITFILE_ERR_NO_PATH: |
fc045fe7 | 784 | die(_("no path in gitfile: %s"), path); |
5f29433f | 785 | case READ_GITFILE_ERR_NOT_A_REPO: |
fc045fe7 | 786 | die(_("not a git repository: %s"), dir); |
5f29433f | 787 | default: |
033abf97 | 788 | BUG("unknown error code"); |
5f29433f SB |
789 | } |
790 | } | |
791 | ||
b44ebb19 LH |
792 | /* |
793 | * Try to read the location of the git directory from the .git file, | |
ea1d8756 HWN |
794 | * return path to git directory if found. The return value comes from |
795 | * a shared buffer. | |
a93bedad EE |
796 | * |
797 | * On failure, if return_error_code is not NULL, return_error_code | |
798 | * will be set to an error code and NULL will be returned. If | |
799 | * return_error_code is NULL the function will die instead (for most | |
800 | * cases). | |
b44ebb19 | 801 | */ |
a93bedad | 802 | const char *read_gitfile_gently(const char *path, int *return_error_code) |
b44ebb19 | 803 | { |
921bdd96 | 804 | const int max_file_size = 1 << 20; /* 1MB */ |
a93bedad EE |
805 | int error_code = 0; |
806 | char *buf = NULL; | |
807 | char *dir = NULL; | |
40c813e0 | 808 | const char *slash; |
b44ebb19 LH |
809 | struct stat st; |
810 | int fd; | |
b1905aea | 811 | ssize_t len; |
3d7747e3 | 812 | static struct strbuf realpath = STRBUF_INIT; |
b44ebb19 | 813 | |
a93bedad | 814 | if (stat(path, &st)) { |
5c4003ca | 815 | /* NEEDSWORK: discern between ENOENT vs other errors */ |
a93bedad EE |
816 | error_code = READ_GITFILE_ERR_STAT_FAILED; |
817 | goto cleanup_return; | |
818 | } | |
819 | if (!S_ISREG(st.st_mode)) { | |
820 | error_code = READ_GITFILE_ERR_NOT_A_FILE; | |
821 | goto cleanup_return; | |
822 | } | |
921bdd96 EE |
823 | if (st.st_size > max_file_size) { |
824 | error_code = READ_GITFILE_ERR_TOO_LARGE; | |
825 | goto cleanup_return; | |
826 | } | |
b44ebb19 | 827 | fd = open(path, O_RDONLY); |
a93bedad EE |
828 | if (fd < 0) { |
829 | error_code = READ_GITFILE_ERR_OPEN_FAILED; | |
830 | goto cleanup_return; | |
831 | } | |
3733e694 | 832 | buf = xmallocz(st.st_size); |
b44ebb19 LH |
833 | len = read_in_full(fd, buf, st.st_size); |
834 | close(fd); | |
a93bedad EE |
835 | if (len != st.st_size) { |
836 | error_code = READ_GITFILE_ERR_READ_FAILED; | |
837 | goto cleanup_return; | |
838 | } | |
a93bedad EE |
839 | if (!starts_with(buf, "gitdir: ")) { |
840 | error_code = READ_GITFILE_ERR_INVALID_FORMAT; | |
841 | goto cleanup_return; | |
842 | } | |
b44ebb19 LH |
843 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') |
844 | len--; | |
a93bedad EE |
845 | if (len < 9) { |
846 | error_code = READ_GITFILE_ERR_NO_PATH; | |
847 | goto cleanup_return; | |
848 | } | |
b44ebb19 | 849 | buf[len] = '\0'; |
40c813e0 BK |
850 | dir = buf + 8; |
851 | ||
852 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
853 | size_t pathlen = slash+1 - path; | |
75faa45a JK |
854 | dir = xstrfmt("%.*s%.*s", (int)pathlen, path, |
855 | (int)(len - 8), buf + 8); | |
40c813e0 BK |
856 | free(buf); |
857 | buf = dir; | |
858 | } | |
a93bedad EE |
859 | if (!is_git_directory(dir)) { |
860 | error_code = READ_GITFILE_ERR_NOT_A_REPO; | |
861 | goto cleanup_return; | |
862 | } | |
3d7747e3 AM |
863 | |
864 | strbuf_realpath(&realpath, dir, 1); | |
865 | path = realpath.buf; | |
40c813e0 | 866 | |
a93bedad | 867 | cleanup_return: |
a93bedad EE |
868 | if (return_error_code) |
869 | *return_error_code = error_code; | |
5f29433f SB |
870 | else if (error_code) |
871 | read_gitfile_error_die(error_code, path, dir); | |
a93bedad | 872 | |
b44ebb19 | 873 | free(buf); |
38ae8784 | 874 | return error_code ? NULL : path; |
b44ebb19 LH |
875 | } |
876 | ||
e4e30347 | 877 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
7333ed17 | 878 | struct strbuf *cwd, |
abade65b | 879 | struct repository_format *repo_fmt, |
b3f66fd3 | 880 | int *nongit_ok) |
e4e30347 | 881 | { |
b3f66fd3 NTND |
882 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
883 | const char *worktree; | |
884 | char *gitfile; | |
9b125da4 | 885 | int offset; |
e4e30347 JN |
886 | |
887 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
fc045fe7 | 888 | die(_("'$%s' too big"), GIT_DIR_ENVIRONMENT); |
b3f66fd3 | 889 | |
13d6ec91 | 890 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
891 | if (gitfile) { |
892 | gitfile = xstrdup(gitfile); | |
893 | gitdirenv = gitfile; | |
894 | } | |
895 | ||
e4e30347 JN |
896 | if (!is_git_directory(gitdirenv)) { |
897 | if (nongit_ok) { | |
898 | *nongit_ok = 1; | |
b3f66fd3 | 899 | free(gitfile); |
e4e30347 JN |
900 | return NULL; |
901 | } | |
fc045fe7 | 902 | die(_("not a git repository: '%s'"), gitdirenv); |
e4e30347 | 903 | } |
b3f66fd3 | 904 | |
abade65b | 905 | if (check_repository_format_gently(gitdirenv, repo_fmt, nongit_ok)) { |
b3f66fd3 NTND |
906 | free(gitfile); |
907 | return NULL; | |
e4e30347 | 908 | } |
b3f66fd3 NTND |
909 | |
910 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
911 | if (work_tree_env) | |
912 | set_git_work_tree(work_tree_env); | |
913 | else if (is_bare_repository_cfg > 0) { | |
fada7674 JK |
914 | if (git_work_tree_cfg) { |
915 | /* #22.2, #30 */ | |
916 | warning("core.bare and core.worktree do not make sense"); | |
917 | work_tree_config_is_bogus = 1; | |
918 | } | |
b3f66fd3 NTND |
919 | |
920 | /* #18, #26 */ | |
0915a5b4 | 921 | set_git_dir(gitdirenv, 0); |
b3f66fd3 | 922 | free(gitfile); |
e4e30347 | 923 | return NULL; |
b3f66fd3 NTND |
924 | } |
925 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
926 | if (is_absolute_path(git_work_tree_cfg)) | |
927 | set_git_work_tree(git_work_tree_cfg); | |
928 | else { | |
56b9f6e7 | 929 | char *core_worktree; |
b3f66fd3 | 930 | if (chdir(gitdirenv)) |
fc045fe7 | 931 | die_errno(_("cannot chdir to '%s'"), gitdirenv); |
b3f66fd3 | 932 | if (chdir(git_work_tree_cfg)) |
fc045fe7 | 933 | die_errno(_("cannot chdir to '%s'"), git_work_tree_cfg); |
56b9f6e7 | 934 | core_worktree = xgetcwd(); |
7333ed17 | 935 | if (chdir(cwd->buf)) |
fc045fe7 | 936 | die_errno(_("cannot come back to cwd")); |
b3f66fd3 | 937 | set_git_work_tree(core_worktree); |
56b9f6e7 | 938 | free(core_worktree); |
b3f66fd3 NTND |
939 | } |
940 | } | |
2cd83d10 JK |
941 | else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) { |
942 | /* #16d */ | |
0915a5b4 | 943 | set_git_dir(gitdirenv, 0); |
2cd83d10 JK |
944 | free(gitfile); |
945 | return NULL; | |
946 | } | |
b3f66fd3 NTND |
947 | else /* #2, #10 */ |
948 | set_git_work_tree("."); | |
949 | ||
950 | /* set_git_work_tree() must have been called by now */ | |
951 | worktree = get_git_work_tree(); | |
952 | ||
953 | /* both get_git_work_tree() and cwd are already normalized */ | |
7333ed17 | 954 | if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */ |
0915a5b4 | 955 | set_git_dir(gitdirenv, 0); |
b3f66fd3 | 956 | free(gitfile); |
e4e30347 | 957 | return NULL; |
b3f66fd3 | 958 | } |
e4e30347 | 959 | |
7333ed17 | 960 | offset = dir_inside_of(cwd->buf, worktree); |
9b125da4 | 961 | if (offset >= 0) { /* cwd inside worktree? */ |
0915a5b4 | 962 | set_git_dir(gitdirenv, 1); |
b3f66fd3 | 963 | if (chdir(worktree)) |
fc045fe7 | 964 | die_errno(_("cannot chdir to '%s'"), worktree); |
7333ed17 | 965 | strbuf_addch(cwd, '/'); |
b3f66fd3 | 966 | free(gitfile); |
7333ed17 | 967 | return cwd->buf + offset; |
93a00542 | 968 | } |
b3f66fd3 NTND |
969 | |
970 | /* cwd outside worktree */ | |
0915a5b4 | 971 | set_git_dir(gitdirenv, 0); |
b3f66fd3 NTND |
972 | free(gitfile); |
973 | return NULL; | |
93a00542 JN |
974 | } |
975 | ||
9951d3b3 | 976 | static const char *setup_discovered_git_dir(const char *gitdir, |
7333ed17 | 977 | struct strbuf *cwd, int offset, |
abade65b | 978 | struct repository_format *repo_fmt, |
9951d3b3 | 979 | int *nongit_ok) |
98937bef | 980 | { |
abade65b | 981 | if (check_repository_format_gently(gitdir, repo_fmt, nongit_ok)) |
9951d3b3 | 982 | return NULL; |
98937bef | 983 | |
4868b2ea JN |
984 | /* --work-tree is set without --git-dir; use discovered one */ |
985 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
2d4dcf21 JS |
986 | char *to_free = NULL; |
987 | const char *ret; | |
988 | ||
7333ed17 | 989 | if (offset != cwd->len && !is_absolute_path(gitdir)) |
2d4dcf21 | 990 | gitdir = to_free = real_pathdup(gitdir, 1); |
7333ed17 | 991 | if (chdir(cwd->buf)) |
fc045fe7 | 992 | die_errno(_("cannot come back to cwd")); |
abade65b | 993 | ret = setup_explicit_git_dir(gitdir, cwd, repo_fmt, nongit_ok); |
2d4dcf21 JS |
994 | free(to_free); |
995 | return ret; | |
4868b2ea JN |
996 | } |
997 | ||
9951d3b3 NTND |
998 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
999 | if (is_bare_repository_cfg > 0) { | |
0915a5b4 | 1000 | set_git_dir(gitdir, (offset != cwd->len)); |
7333ed17 | 1001 | if (chdir(cwd->buf)) |
fc045fe7 | 1002 | die_errno(_("cannot come back to cwd")); |
98937bef | 1003 | return NULL; |
9951d3b3 | 1004 | } |
98937bef | 1005 | |
9951d3b3 NTND |
1006 | /* #0, #1, #5, #8, #9, #12, #13 */ |
1007 | set_git_work_tree("."); | |
1008 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
0915a5b4 | 1009 | set_git_dir(gitdir, 0); |
98937bef | 1010 | inside_git_dir = 0; |
9951d3b3 | 1011 | inside_work_tree = 1; |
5cf7b3b1 | 1012 | if (offset >= cwd->len) |
98937bef NTND |
1013 | return NULL; |
1014 | ||
df380d58 JS |
1015 | /* Make "offset" point past the '/' (already the case for root dirs) */ |
1016 | if (offset != offset_1st_component(cwd->buf)) | |
1017 | offset++; | |
1018 | /* Add a '/' at the end */ | |
7333ed17 RS |
1019 | strbuf_addch(cwd, '/'); |
1020 | return cwd->buf + offset; | |
98937bef NTND |
1021 | } |
1022 | ||
1cd8031b | 1023 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
7333ed17 | 1024 | static const char *setup_bare_git_dir(struct strbuf *cwd, int offset, |
abade65b | 1025 | struct repository_format *repo_fmt, |
7333ed17 | 1026 | int *nongit_ok) |
68698da5 JN |
1027 | { |
1028 | int root_len; | |
1029 | ||
abade65b | 1030 | if (check_repository_format_gently(".", repo_fmt, nongit_ok)) |
1cd8031b NTND |
1031 | return NULL; |
1032 | ||
2cd83d10 JK |
1033 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
1034 | ||
4868b2ea JN |
1035 | /* --work-tree is set without --git-dir; use discovered one */ |
1036 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
da6f8475 | 1037 | static const char *gitdir; |
4868b2ea | 1038 | |
7333ed17 RS |
1039 | gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset); |
1040 | if (chdir(cwd->buf)) | |
fc045fe7 | 1041 | die_errno(_("cannot come back to cwd")); |
abade65b | 1042 | return setup_explicit_git_dir(gitdir, cwd, repo_fmt, nongit_ok); |
4868b2ea JN |
1043 | } |
1044 | ||
68698da5 | 1045 | inside_git_dir = 1; |
1cd8031b | 1046 | inside_work_tree = 0; |
7333ed17 RS |
1047 | if (offset != cwd->len) { |
1048 | if (chdir(cwd->buf)) | |
fc045fe7 | 1049 | die_errno(_("cannot come back to cwd")); |
7333ed17 RS |
1050 | root_len = offset_1st_component(cwd->buf); |
1051 | strbuf_setlen(cwd, offset > root_len ? offset : root_len); | |
0915a5b4 | 1052 | set_git_dir(cwd->buf, 0); |
337e51ce | 1053 | } |
1cd8031b | 1054 | else |
0915a5b4 | 1055 | set_git_dir(".", 0); |
68698da5 JN |
1056 | return NULL; |
1057 | } | |
1058 | ||
2565b43b | 1059 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
60c98d1e JN |
1060 | { |
1061 | struct stat buf; | |
2565b43b | 1062 | if (stat(path, &buf)) { |
fc045fe7 | 1063 | die_errno(_("failed to stat '%*s%s%s'"), |
2565b43b | 1064 | prefix_len, |
60c98d1e JN |
1065 | prefix ? prefix : "", |
1066 | prefix ? "/" : "", path); | |
2565b43b | 1067 | } |
60c98d1e JN |
1068 | return buf.st_dev; |
1069 | } | |
1070 | ||
9e2326c7 | 1071 | /* |
1b77d83c | 1072 | * A "string_list_each_func_t" function that canonicalizes an entry |
4530a85b | 1073 | * from GIT_CEILING_DIRECTORIES using real_pathdup(), or |
7ec30aaa MH |
1074 | * discards it if unusable. The presence of an empty entry in |
1075 | * GIT_CEILING_DIRECTORIES turns off canonicalization for all | |
1076 | * subsequent entries. | |
9e2326c7 | 1077 | */ |
1b77d83c | 1078 | static int canonicalize_ceiling_entry(struct string_list_item *item, |
7ec30aaa | 1079 | void *cb_data) |
9e2326c7 | 1080 | { |
7ec30aaa | 1081 | int *empty_entry_found = cb_data; |
1b77d83c | 1082 | char *ceil = item->string; |
9e2326c7 | 1083 | |
7ec30aaa MH |
1084 | if (!*ceil) { |
1085 | *empty_entry_found = 1; | |
9e2326c7 | 1086 | return 0; |
7ec30aaa | 1087 | } else if (!is_absolute_path(ceil)) { |
9e2326c7 | 1088 | return 0; |
7ec30aaa MH |
1089 | } else if (*empty_entry_found) { |
1090 | /* Keep entry but do not canonicalize it */ | |
1091 | return 1; | |
1092 | } else { | |
ce83eadd | 1093 | char *real_path = real_pathdup(ceil, 0); |
4ac9006f | 1094 | if (!real_path) { |
7ec30aaa | 1095 | return 0; |
4ac9006f | 1096 | } |
7ec30aaa | 1097 | free(item->string); |
4ac9006f | 1098 | item->string = real_path; |
7ec30aaa MH |
1099 | return 1; |
1100 | } | |
9e2326c7 MH |
1101 | } |
1102 | ||
8959555c JS |
1103 | struct safe_directory_data { |
1104 | const char *path; | |
1105 | int is_safe; | |
1106 | }; | |
1107 | ||
1108 | static int safe_directory_cb(const char *key, const char *value, void *d) | |
1109 | { | |
1110 | struct safe_directory_data *data = d; | |
1111 | ||
bb50ec3c MV |
1112 | if (strcmp(key, "safe.directory")) |
1113 | return 0; | |
1114 | ||
0f85c4a3 | 1115 | if (!value || !*value) { |
8959555c | 1116 | data->is_safe = 0; |
0f85c4a3 DS |
1117 | } else if (!strcmp(value, "*")) { |
1118 | data->is_safe = 1; | |
1119 | } else { | |
8959555c JS |
1120 | const char *interpolated = NULL; |
1121 | ||
1122 | if (!git_config_pathname(&interpolated, key, value) && | |
1123 | !fspathcmp(data->path, interpolated ? interpolated : value)) | |
1124 | data->is_safe = 1; | |
1125 | ||
1126 | free((char *)interpolated); | |
1127 | } | |
1128 | ||
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | static int ensure_valid_ownership(const char *path) | |
1133 | { | |
1134 | struct safe_directory_data data = { .path = path }; | |
1135 | ||
e47363e5 DS |
1136 | if (!git_env_bool("GIT_TEST_ASSUME_DIFFERENT_OWNER", 0) && |
1137 | is_path_owned_by_current_user(path)) | |
8959555c JS |
1138 | return 1; |
1139 | ||
1140 | read_very_early_config(safe_directory_cb, &data); | |
1141 | ||
1142 | return data.is_safe; | |
1143 | } | |
1144 | ||
ce9b8aab JS |
1145 | enum discovery_result { |
1146 | GIT_DIR_NONE = 0, | |
1147 | GIT_DIR_EXPLICIT, | |
1148 | GIT_DIR_DISCOVERED, | |
1149 | GIT_DIR_BARE, | |
1150 | /* these are errors */ | |
1151 | GIT_DIR_HIT_CEILING = -1, | |
01017dce | 1152 | GIT_DIR_HIT_MOUNT_POINT = -2, |
8959555c JS |
1153 | GIT_DIR_INVALID_GITFILE = -3, |
1154 | GIT_DIR_INVALID_OWNERSHIP = -4 | |
ce9b8aab JS |
1155 | }; |
1156 | ||
e90fdc39 JS |
1157 | /* |
1158 | * We cannot decide in this function whether we are in the work tree or | |
1159 | * not, since the config can only be read _after_ this function was called. | |
ce9b8aab JS |
1160 | * |
1161 | * Also, we avoid changing any global state (such as the current working | |
1162 | * directory) to allow early callers. | |
1163 | * | |
1164 | * The directory where the search should start needs to be passed in via the | |
1165 | * `dir` parameter; upon return, the `dir` buffer will contain the path of | |
1166 | * the directory where the search ended, and `gitdir` will contain the path of | |
1167 | * the discovered .git/ directory, if any. If `gitdir` is not absolute, it | |
1168 | * is relative to `dir` (i.e. *not* necessarily the cwd). | |
e90fdc39 | 1169 | */ |
ce9b8aab | 1170 | static enum discovery_result setup_git_directory_gently_1(struct strbuf *dir, |
01017dce JS |
1171 | struct strbuf *gitdir, |
1172 | int die_on_error) | |
d288a700 | 1173 | { |
0454dd93 | 1174 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
31171d9e | 1175 | struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; |
ce9b8aab | 1176 | const char *gitdirenv; |
d17f2124 | 1177 | int ceil_offset = -1, min_offset = offset_1st_component(dir->buf); |
c7d1d1b1 RH |
1178 | dev_t current_device = 0; |
1179 | int one_filesystem = 1; | |
d288a700 | 1180 | |
e90fdc39 JS |
1181 | /* |
1182 | * If GIT_DIR is set explicitly, we're not going | |
1183 | * to do any discovery, but we still do repository | |
1184 | * validation. | |
1185 | */ | |
ad1a382f | 1186 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
ce9b8aab JS |
1187 | if (gitdirenv) { |
1188 | strbuf_addstr(gitdir, gitdirenv); | |
1189 | return GIT_DIR_EXPLICIT; | |
1190 | } | |
d288a700 | 1191 | |
31171d9e | 1192 | if (env_ceiling_dirs) { |
7ec30aaa MH |
1193 | int empty_entry_found = 0; |
1194 | ||
31171d9e | 1195 | string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); |
1b77d83c | 1196 | filter_string_list(&ceiling_dirs, 0, |
7ec30aaa | 1197 | canonicalize_ceiling_entry, &empty_entry_found); |
ce9b8aab | 1198 | ceil_offset = longest_ancestor_length(dir->buf, &ceiling_dirs); |
31171d9e MH |
1199 | string_list_clear(&ceiling_dirs, 0); |
1200 | } | |
1201 | ||
ce9b8aab JS |
1202 | if (ceil_offset < 0) |
1203 | ceil_offset = min_offset - 2; | |
d288a700 | 1204 | |
e2683d51 JS |
1205 | if (min_offset && min_offset == dir->len && |
1206 | !is_dir_sep(dir->buf[min_offset - 1])) { | |
1207 | strbuf_addch(dir, '/'); | |
1208 | min_offset++; | |
1209 | } | |
1210 | ||
892c41b9 | 1211 | /* |
ce9b8aab | 1212 | * Test in the following order (relative to the dir): |
b44ebb19 | 1213 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
1214 | * - .git/ |
1215 | * - ./ (bare) | |
b44ebb19 | 1216 | * - ../.git |
e90fdc39 JS |
1217 | * - ../.git/ |
1218 | * - ../ (bare) | |
176b2d32 | 1219 | * - ../../.git |
e90fdc39 | 1220 | * etc. |
892c41b9 | 1221 | */ |
cf87463e | 1222 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e | 1223 | if (one_filesystem) |
ce9b8aab | 1224 | current_device = get_device_or_die(dir->buf, NULL, 0); |
e90fdc39 | 1225 | for (;;) { |
01017dce | 1226 | int offset = dir->len, error_code = 0; |
ce9b8aab JS |
1227 | |
1228 | if (offset > min_offset) | |
1229 | strbuf_addch(dir, '/'); | |
1230 | strbuf_addstr(dir, DEFAULT_GIT_DIR_ENVIRONMENT); | |
01017dce JS |
1231 | gitdirenv = read_gitfile_gently(dir->buf, die_on_error ? |
1232 | NULL : &error_code); | |
1233 | if (!gitdirenv) { | |
1234 | if (die_on_error || | |
1235 | error_code == READ_GITFILE_ERR_NOT_A_FILE) { | |
5c4003ca | 1236 | /* NEEDSWORK: fail if .git is not file nor dir */ |
01017dce JS |
1237 | if (is_git_directory(dir->buf)) |
1238 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
1239 | } else if (error_code != READ_GITFILE_ERR_STAT_FAILED) | |
1240 | return GIT_DIR_INVALID_GITFILE; | |
9951d3b3 | 1241 | } |
ce9b8aab | 1242 | strbuf_setlen(dir, offset); |
9951d3b3 | 1243 | if (gitdirenv) { |
8959555c JS |
1244 | if (!ensure_valid_ownership(dir->buf)) |
1245 | return GIT_DIR_INVALID_OWNERSHIP; | |
ce9b8aab JS |
1246 | strbuf_addstr(gitdir, gitdirenv); |
1247 | return GIT_DIR_DISCOVERED; | |
9951d3b3 | 1248 | } |
9951d3b3 | 1249 | |
ce9b8aab | 1250 | if (is_git_directory(dir->buf)) { |
8959555c JS |
1251 | if (!ensure_valid_ownership(dir->buf)) |
1252 | return GIT_DIR_INVALID_OWNERSHIP; | |
ce9b8aab JS |
1253 | strbuf_addstr(gitdir, "."); |
1254 | return GIT_DIR_BARE; | |
502ffe34 | 1255 | } |
9951d3b3 | 1256 | |
ce9b8aab JS |
1257 | if (offset <= min_offset) |
1258 | return GIT_DIR_HIT_CEILING; | |
1cd8031b | 1259 | |
ce9b8aab | 1260 | while (--offset > ceil_offset && !is_dir_sep(dir->buf[offset])) |
6c1e6544 | 1261 | ; /* continue */ |
ce9b8aab JS |
1262 | if (offset <= ceil_offset) |
1263 | return GIT_DIR_HIT_CEILING; | |
1264 | ||
1265 | strbuf_setlen(dir, offset > min_offset ? offset : min_offset); | |
1266 | if (one_filesystem && | |
1267 | current_device != get_device_or_die(dir->buf, NULL, offset)) | |
1268 | return GIT_DIR_HIT_MOUNT_POINT; | |
892c41b9 | 1269 | } |
d288a700 | 1270 | } |
5e7bfe25 | 1271 | |
d3fb71b3 BW |
1272 | int discover_git_directory(struct strbuf *commondir, |
1273 | struct strbuf *gitdir) | |
16ac8b8d JS |
1274 | { |
1275 | struct strbuf dir = STRBUF_INIT, err = STRBUF_INIT; | |
1276 | size_t gitdir_offset = gitdir->len, cwd_len; | |
d3fb71b3 | 1277 | size_t commondir_offset = commondir->len; |
e8805af1 | 1278 | struct repository_format candidate = REPOSITORY_FORMAT_INIT; |
16ac8b8d JS |
1279 | |
1280 | if (strbuf_getcwd(&dir)) | |
d3fb71b3 | 1281 | return -1; |
16ac8b8d JS |
1282 | |
1283 | cwd_len = dir.len; | |
01017dce | 1284 | if (setup_git_directory_gently_1(&dir, gitdir, 0) <= 0) { |
16ac8b8d | 1285 | strbuf_release(&dir); |
d3fb71b3 | 1286 | return -1; |
16ac8b8d JS |
1287 | } |
1288 | ||
1289 | /* | |
1290 | * The returned gitdir is relative to dir, and if dir does not reflect | |
1291 | * the current working directory, we simply make the gitdir absolute. | |
1292 | */ | |
1293 | if (dir.len < cwd_len && !is_absolute_path(gitdir->buf + gitdir_offset)) { | |
1294 | /* Avoid a trailing "/." */ | |
1295 | if (!strcmp(".", gitdir->buf + gitdir_offset)) | |
1296 | strbuf_setlen(gitdir, gitdir_offset); | |
1297 | else | |
1298 | strbuf_addch(&dir, '/'); | |
1299 | strbuf_insert(gitdir, gitdir_offset, dir.buf, dir.len); | |
1300 | } | |
1301 | ||
d3fb71b3 BW |
1302 | get_common_dir(commondir, gitdir->buf + gitdir_offset); |
1303 | ||
16ac8b8d | 1304 | strbuf_reset(&dir); |
d3fb71b3 | 1305 | strbuf_addf(&dir, "%s/config", commondir->buf + commondir_offset); |
16ac8b8d JS |
1306 | read_repository_format(&candidate, dir.buf); |
1307 | strbuf_release(&dir); | |
1308 | ||
1309 | if (verify_repository_format(&candidate, &err) < 0) { | |
1310 | warning("ignoring git dir '%s': %s", | |
1311 | gitdir->buf + gitdir_offset, err.buf); | |
1312 | strbuf_release(&err); | |
d3fb71b3 | 1313 | strbuf_setlen(commondir, commondir_offset); |
69743f9b | 1314 | strbuf_setlen(gitdir, gitdir_offset); |
e8805af1 | 1315 | clear_repository_format(&candidate); |
d3fb71b3 | 1316 | return -1; |
16ac8b8d JS |
1317 | } |
1318 | ||
ebaf3bcf JT |
1319 | /* take ownership of candidate.partial_clone */ |
1320 | the_repository->repository_format_partial_clone = | |
1321 | candidate.partial_clone; | |
1322 | candidate.partial_clone = NULL; | |
1323 | ||
e8805af1 | 1324 | clear_repository_format(&candidate); |
d3fb71b3 | 1325 | return 0; |
16ac8b8d JS |
1326 | } |
1327 | ||
a60645f9 NTND |
1328 | const char *setup_git_directory_gently(int *nongit_ok) |
1329 | { | |
ce9b8aab JS |
1330 | static struct strbuf cwd = STRBUF_INIT; |
1331 | struct strbuf dir = STRBUF_INIT, gitdir = STRBUF_INIT; | |
07098b81 | 1332 | const char *prefix = NULL; |
e8805af1 | 1333 | struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT; |
a60645f9 | 1334 | |
ce9b8aab JS |
1335 | /* |
1336 | * We may have read an incomplete configuration before | |
1337 | * setting-up the git directory. If so, clear the cache so | |
1338 | * that the next queries to the configuration reload complete | |
1339 | * configuration (including the per-repo config file that we | |
1340 | * ignored previously). | |
1341 | */ | |
1342 | git_config_clear(); | |
1343 | ||
1344 | /* | |
1345 | * Let's assume that we are in a git repository. | |
1346 | * If it turns out later that we are somewhere else, the value will be | |
1347 | * updated accordingly. | |
1348 | */ | |
1349 | if (nongit_ok) | |
1350 | *nongit_ok = 0; | |
1351 | ||
1352 | if (strbuf_getcwd(&cwd)) | |
1353 | die_errno(_("Unable to read current working directory")); | |
1354 | strbuf_addbuf(&dir, &cwd); | |
1355 | ||
01017dce | 1356 | switch (setup_git_directory_gently_1(&dir, &gitdir, 1)) { |
ce9b8aab | 1357 | case GIT_DIR_EXPLICIT: |
abade65b | 1358 | prefix = setup_explicit_git_dir(gitdir.buf, &cwd, &repo_fmt, nongit_ok); |
ce9b8aab JS |
1359 | break; |
1360 | case GIT_DIR_DISCOVERED: | |
1361 | if (dir.len < cwd.len && chdir(dir.buf)) | |
fc045fe7 | 1362 | die(_("cannot change to '%s'"), dir.buf); |
ce9b8aab | 1363 | prefix = setup_discovered_git_dir(gitdir.buf, &cwd, dir.len, |
abade65b | 1364 | &repo_fmt, nongit_ok); |
ce9b8aab JS |
1365 | break; |
1366 | case GIT_DIR_BARE: | |
1367 | if (dir.len < cwd.len && chdir(dir.buf)) | |
fc045fe7 | 1368 | die(_("cannot change to '%s'"), dir.buf); |
abade65b | 1369 | prefix = setup_bare_git_dir(&cwd, dir.len, &repo_fmt, nongit_ok); |
ce9b8aab JS |
1370 | break; |
1371 | case GIT_DIR_HIT_CEILING: | |
07098b81 ED |
1372 | if (!nongit_ok) |
1373 | die(_("not a git repository (or any of the parent directories): %s"), | |
1374 | DEFAULT_GIT_DIR_ENVIRONMENT); | |
1375 | *nongit_ok = 1; | |
ce9b8aab JS |
1376 | break; |
1377 | case GIT_DIR_HIT_MOUNT_POINT: | |
07098b81 ED |
1378 | if (!nongit_ok) |
1379 | die(_("not a git repository (or any parent up to mount point %s)\n" | |
1380 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."), | |
1381 | dir.buf); | |
1382 | *nongit_ok = 1; | |
1383 | break; | |
8959555c JS |
1384 | case GIT_DIR_INVALID_OWNERSHIP: |
1385 | if (!nongit_ok) { | |
1386 | struct strbuf quoted = STRBUF_INIT; | |
1387 | ||
1388 | sq_quote_buf_pretty("ed, dir.buf); | |
1389 | die(_("unsafe repository ('%s' is owned by someone else)\n" | |
1390 | "To add an exception for this directory, call:\n" | |
1391 | "\n" | |
1392 | "\tgit config --global --add safe.directory %s"), | |
1393 | dir.buf, quoted.buf); | |
1394 | } | |
1395 | *nongit_ok = 1; | |
1396 | break; | |
07098b81 ED |
1397 | case GIT_DIR_NONE: |
1398 | /* | |
1399 | * As a safeguard against setup_git_directory_gently_1 returning | |
1400 | * this value, fallthrough to BUG. Otherwise it is possible to | |
1401 | * set startup_info->have_repository to 1 when we did nothing to | |
1402 | * find a repository. | |
1403 | */ | |
ce9b8aab | 1404 | default: |
033abf97 | 1405 | BUG("unhandled setup_git_directory_1() result"); |
ce9b8aab JS |
1406 | } |
1407 | ||
07098b81 ED |
1408 | /* |
1409 | * At this point, nongit_ok is stable. If it is non-NULL and points | |
1410 | * to a non-zero value, then this means that we haven't found a | |
1411 | * repository and that the caller expects startup_info to reflect | |
1412 | * this. | |
1413 | * | |
1414 | * Regardless of the state of nongit_ok, startup_info->prefix and | |
1415 | * the GIT_PREFIX environment variable must always match. For details | |
1416 | * see Documentation/config/alias.txt. | |
1417 | */ | |
c7d0e610 | 1418 | if (nongit_ok && *nongit_ok) |
07098b81 | 1419 | startup_info->have_repository = 0; |
c7d0e610 | 1420 | else |
07098b81 | 1421 | startup_info->have_repository = 1; |
46c3cd44 | 1422 | |
73f192c9 BW |
1423 | /* |
1424 | * Not all paths through the setup code will call 'set_git_dir()' (which | |
1425 | * directly sets up the environment) so in order to guarantee that the | |
1426 | * environment is in a consistent state after setup, explicitly setup | |
1427 | * the environment if we have a repository. | |
1428 | * | |
1429 | * NEEDSWORK: currently we allow bogus GIT_DIR values to be set in some | |
1430 | * code paths so we also need to explicitly setup the environment if | |
1431 | * the user has set GIT_DIR. It may be beneficial to disallow bogus | |
1432 | * GIT_DIR values at some point in the future. | |
1433 | */ | |
07098b81 ED |
1434 | if (/* GIT_DIR_EXPLICIT, GIT_DIR_DISCOVERED, GIT_DIR_BARE */ |
1435 | startup_info->have_repository || | |
1436 | /* GIT_DIR_EXPLICIT */ | |
1437 | getenv(GIT_DIR_ENVIRONMENT)) { | |
c14c234f BW |
1438 | if (!the_repository->gitdir) { |
1439 | const char *gitdir = getenv(GIT_DIR_ENVIRONMENT); | |
1440 | if (!gitdir) | |
1441 | gitdir = DEFAULT_GIT_DIR_ENVIRONMENT; | |
357a03eb | 1442 | setup_git_env(gitdir); |
c14c234f | 1443 | } |
ebaf3bcf | 1444 | if (startup_info->have_repository) { |
78a67668 | 1445 | repo_set_hash_algo(the_repository, repo_fmt.hash_algo); |
ebaf3bcf JT |
1446 | /* take ownership of repo_fmt.partial_clone */ |
1447 | the_repository->repository_format_partial_clone = | |
1448 | repo_fmt.partial_clone; | |
1449 | repo_fmt.partial_clone = NULL; | |
1450 | } | |
c14c234f | 1451 | } |
c7d0e610 TB |
1452 | /* |
1453 | * Since precompose_string_if_needed() needs to look at | |
1454 | * the core.precomposeunicode configuration, this | |
1455 | * has to happen after the above block that finds | |
1456 | * out where the repository is, i.e. a preparation | |
1457 | * for calling git_config_get_bool(). | |
1458 | */ | |
1459 | if (prefix) { | |
1460 | prefix = precompose_string_if_needed(prefix); | |
1461 | startup_info->prefix = prefix; | |
1462 | setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1); | |
1463 | } else { | |
1464 | startup_info->prefix = NULL; | |
1465 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); | |
1466 | } | |
1467 | ||
e6f8861b | 1468 | setup_original_cwd(); |
73f192c9 | 1469 | |
ce9b8aab JS |
1470 | strbuf_release(&dir); |
1471 | strbuf_release(&gitdir); | |
e8805af1 | 1472 | clear_repository_format(&repo_fmt); |
ce9b8aab | 1473 | |
a60645f9 NTND |
1474 | return prefix; |
1475 | } | |
1476 | ||
94df2506 JH |
1477 | int git_config_perm(const char *var, const char *value) |
1478 | { | |
06cbe855 HO |
1479 | int i; |
1480 | char *endptr; | |
1481 | ||
afe8a907 | 1482 | if (!value) |
06cbe855 HO |
1483 | return PERM_GROUP; |
1484 | ||
1485 | if (!strcmp(value, "umask")) | |
1486 | return PERM_UMASK; | |
1487 | if (!strcmp(value, "group")) | |
1488 | return PERM_GROUP; | |
1489 | if (!strcmp(value, "all") || | |
1490 | !strcmp(value, "world") || | |
1491 | !strcmp(value, "everybody")) | |
1492 | return PERM_EVERYBODY; | |
1493 | ||
1494 | /* Parse octal numbers */ | |
1495 | i = strtol(value, &endptr, 8); | |
1496 | ||
1497 | /* If not an octal number, maybe true/false? */ | |
1498 | if (*endptr != 0) | |
1499 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
1500 | ||
1501 | /* | |
1502 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 1503 | * a chmod value to restrict to. |
06cbe855 HO |
1504 | */ |
1505 | switch (i) { | |
1506 | case PERM_UMASK: /* 0 */ | |
1507 | return PERM_UMASK; | |
1508 | case OLD_PERM_GROUP: /* 1 */ | |
1509 | return PERM_GROUP; | |
1510 | case OLD_PERM_EVERYBODY: /* 2 */ | |
1511 | return PERM_EVERYBODY; | |
94df2506 | 1512 | } |
06cbe855 HO |
1513 | |
1514 | /* A filemode value was given: 0xxx */ | |
1515 | ||
1516 | if ((i & 0600) != 0600) | |
fc045fe7 | 1517 | die(_("problem with core.sharedRepository filemode value " |
06cbe855 | 1518 | "(0%.3o).\nThe owner of files must always have " |
2ff30e67 | 1519 | "read and write permissions."), i); |
06cbe855 HO |
1520 | |
1521 | /* | |
1522 | * Mask filemode value. Others can not get write permission. | |
1523 | * x flags for directories are handled separately. | |
1524 | */ | |
5a688fe4 | 1525 | return -(i & 0666); |
94df2506 JH |
1526 | } |
1527 | ||
cfe3917c | 1528 | void check_repository_format(struct repository_format *fmt) |
ab9cb76f | 1529 | { |
e8805af1 | 1530 | struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT; |
cfe3917c | 1531 | if (!fmt) |
1532 | fmt = &repo_fmt; | |
1533 | check_repository_format_gently(get_git_dir(), fmt, NULL); | |
f1c126bd | 1534 | startup_info->have_repository = 1; |
d553aceb | 1535 | repo_set_hash_algo(the_repository, fmt->hash_algo); |
ebaf3bcf JT |
1536 | the_repository->repository_format_partial_clone = |
1537 | xstrdup_or_null(fmt->partial_clone); | |
e8805af1 | 1538 | clear_repository_format(&repo_fmt); |
ab9cb76f JH |
1539 | } |
1540 | ||
e1e5ec86 CB |
1541 | /* |
1542 | * Returns the "prefix", a path to the current working directory | |
1543 | * relative to the work tree root, or NULL, if the current working | |
1544 | * directory is not a strict subdirectory of the work tree root. The | |
1545 | * prefix always ends with a '/' character. | |
1546 | */ | |
5e7bfe25 JH |
1547 | const char *setup_git_directory(void) |
1548 | { | |
b3f66fd3 | 1549 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 1550 | } |
abc06822 | 1551 | |
40d96325 | 1552 | const char *resolve_gitdir_gently(const char *suspect, int *return_error_code) |
abc06822 FG |
1553 | { |
1554 | if (is_git_directory(suspect)) | |
1555 | return suspect; | |
40d96325 | 1556 | return read_gitfile_gently(suspect, return_error_code); |
abc06822 | 1557 | } |
1d999ddd TR |
1558 | |
1559 | /* if any standard file descriptor is missing open it to /dev/null */ | |
1560 | void sanitize_stdfds(void) | |
1561 | { | |
d9a65b6c RS |
1562 | int fd = xopen("/dev/null", O_RDWR); |
1563 | while (fd < 2) | |
1564 | fd = xdup(fd); | |
1d999ddd TR |
1565 | if (fd > 2) |
1566 | close(fd); | |
1567 | } | |
de0957ce NTND |
1568 | |
1569 | int daemonize(void) | |
1570 | { | |
1571 | #ifdef NO_POSIX_GOODIES | |
1572 | errno = ENOSYS; | |
1573 | return -1; | |
1574 | #else | |
1575 | switch (fork()) { | |
1576 | case 0: | |
1577 | break; | |
1578 | case -1: | |
fc045fe7 | 1579 | die_errno(_("fork failed")); |
de0957ce NTND |
1580 | default: |
1581 | exit(0); | |
1582 | } | |
1583 | if (setsid() == -1) | |
fc045fe7 | 1584 | die_errno(_("setsid failed")); |
de0957ce NTND |
1585 | close(0); |
1586 | close(1); | |
1587 | close(2); | |
1588 | sanitize_stdfds(); | |
1589 | return 0; | |
1590 | #endif | |
1591 | } |