Revert "compat: add strtok_r()"
[git/mingw.git] / setup.c
blob2e1521b09e5e6a0de585225293805b1d30a03cd4
1 #include "cache.h"
2 #include "dir.h"
3 #include "string-list.h"
5 static int inside_git_dir = -1;
6 static int inside_work_tree = -1;
8 static char *prefix_path_gently(const char *prefix, int len, const char *path)
10 const char *orig = path;
11 char *sanitized;
12 if (is_absolute_path(orig)) {
13 const char *temp = real_path(path);
14 sanitized = xmalloc(len + strlen(temp) + 1);
15 strcpy(sanitized, temp);
16 } else {
17 sanitized = xmalloc(len + strlen(path) + 1);
18 if (len)
19 memcpy(sanitized, prefix, len);
20 strcpy(sanitized + len, path);
22 if (normalize_path_copy(sanitized, sanitized))
23 goto error_out;
24 if (is_absolute_path(orig)) {
25 size_t root_len, len, total;
26 const char *work_tree = get_git_work_tree();
27 if (!work_tree)
28 goto error_out;
29 len = strlen(work_tree);
30 root_len = offset_1st_component(work_tree);
31 total = strlen(sanitized) + 1;
32 if (strncmp(sanitized, work_tree, len) ||
33 (len > root_len && sanitized[len] != '\0' && sanitized[len] != '/')) {
34 error_out:
35 free(sanitized);
36 return NULL;
38 if (sanitized[len] == '/')
39 len++;
40 memmove(sanitized, sanitized + len, total - len);
42 return sanitized;
45 char *prefix_path(const char *prefix, int len, const char *path)
47 char *r = prefix_path_gently(prefix, len, path);
48 if (!r)
49 die("'%s' is outside repository", path);
50 return r;
53 int path_inside_repo(const char *prefix, const char *path)
55 int len = prefix ? strlen(prefix) : 0;
56 char *r = prefix_path_gently(prefix, len, path);
57 if (r) {
58 free(r);
59 return 1;
61 return 0;
64 int check_filename(const char *prefix, const char *arg)
66 const char *name;
67 struct stat st;
69 if (!prefixcmp(arg, ":/")) {
70 if (arg[2] == '\0') /* ":/" is root dir, always exists */
71 return 1;
72 name = arg + 2;
73 } else if (prefix)
74 name = prefix_filename(prefix, strlen(prefix), arg);
75 else
76 name = arg;
77 if (!lstat(name, &st))
78 return 1; /* file exists */
79 if (errno == ENOENT || errno == ENOTDIR)
80 return 0; /* file does not exist */
81 die_errno("failed to stat '%s'", arg);
84 static void NORETURN die_verify_filename(const char *prefix,
85 const char *arg,
86 int diagnose_misspelt_rev)
88 if (!diagnose_misspelt_rev)
89 die("%s: no such path in the working tree.\n"
90 "Use 'git <command> -- <path>...' to specify paths that do not exist locally.",
91 arg);
93 * Saying "'(icase)foo' does not exist in the index" when the
94 * user gave us ":(icase)foo" is just stupid. A magic pathspec
95 * begins with a colon and is followed by a non-alnum; do not
96 * let maybe_die_on_misspelt_object_name() even trigger.
98 if (!(arg[0] == ':' && !isalnum(arg[1])))
99 maybe_die_on_misspelt_object_name(arg, prefix);
101 /* ... or fall back the most general message. */
102 die("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
103 "Use '--' to separate paths from revisions, like this:\n"
104 "'git <command> [<revision>...] -- [<file>...]'", arg);
109 * Verify a filename that we got as an argument for a pathspec
110 * entry. Note that a filename that begins with "-" never verifies
111 * as true, because even if such a filename were to exist, we want
112 * it to be preceded by the "--" marker (or we want the user to
113 * use a format like "./-filename")
115 * The "diagnose_misspelt_rev" is used to provide a user-friendly
116 * diagnosis when dying upon finding that "name" is not a pathname.
117 * If set to 1, the diagnosis will try to diagnose "name" as an
118 * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis
119 * will only complain about an inexisting file.
121 * This function is typically called to check that a "file or rev"
122 * argument is unambiguous. In this case, the caller will want
123 * diagnose_misspelt_rev == 1 when verifying the first non-rev
124 * argument (which could have been a revision), and
125 * diagnose_misspelt_rev == 0 for the next ones (because we already
126 * saw a filename, there's not ambiguity anymore).
128 void verify_filename(const char *prefix,
129 const char *arg,
130 int diagnose_misspelt_rev)
132 if (*arg == '-')
133 die("bad flag '%s' used after filename", arg);
134 if (check_filename(prefix, arg))
135 return;
136 die_verify_filename(prefix, arg, diagnose_misspelt_rev);
140 * Opposite of the above: the command line did not have -- marker
141 * and we parsed the arg as a refname. It should not be interpretable
142 * as a filename.
144 void verify_non_filename(const char *prefix, const char *arg)
146 if (!is_inside_work_tree() || is_inside_git_dir())
147 return;
148 if (*arg == '-')
149 return; /* flag */
150 if (!check_filename(prefix, arg))
151 return;
152 die("ambiguous argument '%s': both revision and filename\n"
153 "Use '--' to separate paths from revisions, like this:\n"
154 "'git <command> [<revision>...] -- [<file>...]'", arg);
158 * Magic pathspec
160 * NEEDSWORK: These need to be moved to dir.h or even to a new
161 * pathspec.h when we restructure get_pathspec() users to use the
162 * "struct pathspec" interface.
164 * Possible future magic semantics include stuff like:
166 * { PATHSPEC_NOGLOB, '!', "noglob" },
167 * { PATHSPEC_ICASE, '\0', "icase" },
168 * { PATHSPEC_RECURSIVE, '*', "recursive" },
169 * { PATHSPEC_REGEXP, '\0', "regexp" },
172 #define PATHSPEC_FROMTOP (1<<0)
174 static struct pathspec_magic {
175 unsigned bit;
176 char mnemonic; /* this cannot be ':'! */
177 const char *name;
178 } pathspec_magic[] = {
179 { PATHSPEC_FROMTOP, '/', "top" },
183 * Take an element of a pathspec and check for magic signatures.
184 * Append the result to the prefix.
186 * For now, we only parse the syntax and throw out anything other than
187 * "top" magic.
189 * NEEDSWORK: This needs to be rewritten when we start migrating
190 * get_pathspec() users to use the "struct pathspec" interface. For
191 * example, a pathspec element may be marked as case-insensitive, but
192 * the prefix part must always match literally, and a single stupid
193 * string cannot express such a case.
195 static const char *prefix_pathspec(const char *prefix, int prefixlen, const char *elt)
197 unsigned magic = 0;
198 const char *copyfrom = elt;
199 int i;
201 if (elt[0] != ':') {
202 ; /* nothing to do */
203 } else if (elt[1] == '(') {
204 /* longhand */
205 const char *nextat;
206 for (copyfrom = elt + 2;
207 *copyfrom && *copyfrom != ')';
208 copyfrom = nextat) {
209 size_t len = strcspn(copyfrom, ",)");
210 if (copyfrom[len] == ')')
211 nextat = copyfrom + len;
212 else
213 nextat = copyfrom + len + 1;
214 if (!len)
215 continue;
216 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
217 if (strlen(pathspec_magic[i].name) == len &&
218 !strncmp(pathspec_magic[i].name, copyfrom, len)) {
219 magic |= pathspec_magic[i].bit;
220 break;
222 if (ARRAY_SIZE(pathspec_magic) <= i)
223 die("Invalid pathspec magic '%.*s' in '%s'",
224 (int) len, copyfrom, elt);
226 if (*copyfrom == ')')
227 copyfrom++;
228 } else {
229 /* shorthand */
230 for (copyfrom = elt + 1;
231 *copyfrom && *copyfrom != ':';
232 copyfrom++) {
233 char ch = *copyfrom;
235 if (!is_pathspec_magic(ch))
236 break;
237 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
238 if (pathspec_magic[i].mnemonic == ch) {
239 magic |= pathspec_magic[i].bit;
240 break;
242 if (ARRAY_SIZE(pathspec_magic) <= i)
243 die("Unimplemented pathspec magic '%c' in '%s'",
244 ch, elt);
246 if (*copyfrom == ':')
247 copyfrom++;
250 if (magic & PATHSPEC_FROMTOP)
251 return xstrdup(copyfrom);
252 else
253 return prefix_path(prefix, prefixlen, copyfrom);
257 * N.B. get_pathspec() is deprecated in favor of the "struct pathspec"
258 * based interface - see pathspec_magic above.
260 * Arguments:
261 * - prefix - a path relative to the root of the working tree
262 * - pathspec - a list of paths underneath the prefix path
264 * Iterates over pathspec, prepending each path with prefix,
265 * and return the resulting list.
267 * If pathspec is empty, return a singleton list containing prefix.
269 * If pathspec and prefix are both empty, return an empty list.
271 * This is typically used by built-in commands such as add.c, in order
272 * to normalize argv arguments provided to the built-in into a list of
273 * paths to process, all relative to the root of the working tree.
275 const char **get_pathspec(const char *prefix, const char **pathspec)
277 const char *entry = *pathspec;
278 const char **src, **dst;
279 int prefixlen;
281 if (!prefix && !entry)
282 return NULL;
284 if (!entry) {
285 static const char *spec[2];
286 spec[0] = prefix;
287 spec[1] = NULL;
288 return spec;
291 /* Otherwise we have to re-write the entries.. */
292 src = pathspec;
293 dst = pathspec;
294 prefixlen = prefix ? strlen(prefix) : 0;
295 while (*src) {
296 *(dst++) = prefix_pathspec(prefix, prefixlen, *src);
297 src++;
299 *dst = NULL;
300 if (!*pathspec)
301 return NULL;
302 return pathspec;
306 * Test if it looks like we're at a git directory.
307 * We want to see:
309 * - either an objects/ directory _or_ the proper
310 * GIT_OBJECT_DIRECTORY environment variable
311 * - a refs/ directory
312 * - either a HEAD symlink or a HEAD file that is formatted as
313 * a proper "ref:", or a regular file HEAD that has a properly
314 * formatted sha1 object name.
316 int is_git_directory(const char *suspect)
318 char path[PATH_MAX];
319 size_t len = strlen(suspect);
321 if (PATH_MAX <= len + strlen("/objects"))
322 die("Too long path: %.*s", 60, suspect);
323 strcpy(path, suspect);
324 if (getenv(DB_ENVIRONMENT)) {
325 if (access(getenv(DB_ENVIRONMENT), X_OK))
326 return 0;
328 else {
329 strcpy(path + len, "/objects");
330 if (access(path, X_OK))
331 return 0;
334 strcpy(path + len, "/refs");
335 if (access(path, X_OK))
336 return 0;
338 strcpy(path + len, "/HEAD");
339 if (validate_headref(path))
340 return 0;
342 return 1;
345 int is_inside_git_dir(void)
347 if (inside_git_dir < 0)
348 inside_git_dir = is_inside_dir(get_git_dir());
349 return inside_git_dir;
352 int is_inside_work_tree(void)
354 if (inside_work_tree < 0)
355 inside_work_tree = is_inside_dir(get_git_work_tree());
356 return inside_work_tree;
359 void setup_work_tree(void)
361 const char *work_tree, *git_dir;
362 static int initialized = 0;
364 if (initialized)
365 return;
366 work_tree = get_git_work_tree();
367 git_dir = get_git_dir();
368 if (!is_absolute_path(git_dir))
369 git_dir = real_path(get_git_dir());
370 if (!work_tree || chdir(work_tree))
371 die("This operation must be run in a work tree");
374 * Make sure subsequent git processes find correct worktree
375 * if $GIT_WORK_TREE is set relative
377 if (getenv(GIT_WORK_TREE_ENVIRONMENT))
378 setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1);
380 set_git_dir(relative_path(git_dir, work_tree));
381 initialized = 1;
384 static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
386 char repo_config[PATH_MAX+1];
389 * git_config() can't be used here because it calls git_pathdup()
390 * to get $GIT_CONFIG/config. That call will make setup_git_env()
391 * set git_dir to ".git".
393 * We are in gitdir setup, no git dir has been found useable yet.
394 * Use a gentler version of git_config() to check if this repo
395 * is a good one.
397 snprintf(repo_config, PATH_MAX, "%s/config", gitdir);
398 git_config_early(check_repository_format_version, NULL, repo_config);
399 if (GIT_REPO_VERSION < repository_format_version) {
400 if (!nongit_ok)
401 die ("Expected git repo version <= %d, found %d",
402 GIT_REPO_VERSION, repository_format_version);
403 warning("Expected git repo version <= %d, found %d",
404 GIT_REPO_VERSION, repository_format_version);
405 warning("Please upgrade Git");
406 *nongit_ok = -1;
407 return -1;
409 return 0;
413 * Try to read the location of the git directory from the .git file,
414 * return path to git directory if found.
416 const char *read_gitfile(const char *path)
418 char *buf;
419 char *dir;
420 const char *slash;
421 struct stat st;
422 int fd;
423 ssize_t len;
425 if (stat(path, &st))
426 return NULL;
427 if (!S_ISREG(st.st_mode))
428 return NULL;
429 fd = open(path, O_RDONLY);
430 if (fd < 0)
431 die_errno("Error opening '%s'", path);
432 buf = xmalloc(st.st_size + 1);
433 len = read_in_full(fd, buf, st.st_size);
434 close(fd);
435 if (len != st.st_size)
436 die("Error reading %s", path);
437 buf[len] = '\0';
438 if (prefixcmp(buf, "gitdir: "))
439 die("Invalid gitfile format: %s", path);
440 while (buf[len - 1] == '\n' || buf[len - 1] == '\r')
441 len--;
442 if (len < 9)
443 die("No path in gitfile: %s", path);
444 buf[len] = '\0';
445 dir = buf + 8;
447 if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) {
448 size_t pathlen = slash+1 - path;
449 size_t dirlen = pathlen + len - 8;
450 dir = xmalloc(dirlen + 1);
451 strncpy(dir, path, pathlen);
452 strncpy(dir + pathlen, buf + 8, len - 8);
453 dir[dirlen] = '\0';
454 free(buf);
455 buf = dir;
458 if (!is_git_directory(dir))
459 die("Not a git repository: %s", dir);
460 path = real_path(dir);
462 free(buf);
463 return path;
466 static const char *setup_explicit_git_dir(const char *gitdirenv,
467 char *cwd, int len,
468 int *nongit_ok)
470 const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
471 const char *worktree;
472 char *gitfile;
473 int offset;
475 if (PATH_MAX - 40 < strlen(gitdirenv))
476 die("'$%s' too big", GIT_DIR_ENVIRONMENT);
478 gitfile = (char*)read_gitfile(gitdirenv);
479 if (gitfile) {
480 gitfile = xstrdup(gitfile);
481 gitdirenv = gitfile;
484 if (!is_git_directory(gitdirenv)) {
485 if (nongit_ok) {
486 *nongit_ok = 1;
487 free(gitfile);
488 return NULL;
490 die("Not a git repository: '%s'", gitdirenv);
493 if (check_repository_format_gently(gitdirenv, nongit_ok)) {
494 free(gitfile);
495 return NULL;
498 /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
499 if (work_tree_env)
500 set_git_work_tree(work_tree_env);
501 else if (is_bare_repository_cfg > 0) {
502 if (git_work_tree_cfg) /* #22.2, #30 */
503 die("core.bare and core.worktree do not make sense");
505 /* #18, #26 */
506 set_git_dir(gitdirenv);
507 free(gitfile);
508 return NULL;
510 else if (git_work_tree_cfg) { /* #6, #14 */
511 if (is_absolute_path(git_work_tree_cfg))
512 set_git_work_tree(git_work_tree_cfg);
513 else {
514 char core_worktree[PATH_MAX];
515 if (chdir(gitdirenv))
516 die_errno("Could not chdir to '%s'", gitdirenv);
517 if (chdir(git_work_tree_cfg))
518 die_errno("Could not chdir to '%s'", git_work_tree_cfg);
519 if (!getcwd(core_worktree, PATH_MAX))
520 die_errno("Could not get directory '%s'", git_work_tree_cfg);
521 if (chdir(cwd))
522 die_errno("Could not come back to cwd");
523 set_git_work_tree(core_worktree);
526 else /* #2, #10 */
527 set_git_work_tree(".");
529 /* set_git_work_tree() must have been called by now */
530 worktree = get_git_work_tree();
532 /* both get_git_work_tree() and cwd are already normalized */
533 if (!strcmp(cwd, worktree)) { /* cwd == worktree */
534 set_git_dir(gitdirenv);
535 free(gitfile);
536 return NULL;
539 offset = dir_inside_of(cwd, worktree);
540 if (offset >= 0) { /* cwd inside worktree? */
541 set_git_dir(real_path(gitdirenv));
542 if (chdir(worktree))
543 die_errno("Could not chdir to '%s'", worktree);
544 cwd[len++] = '/';
545 cwd[len] = '\0';
546 free(gitfile);
547 return cwd + offset;
550 /* cwd outside worktree */
551 set_git_dir(gitdirenv);
552 free(gitfile);
553 return NULL;
556 static const char *setup_discovered_git_dir(const char *gitdir,
557 char *cwd, int offset, int len,
558 int *nongit_ok)
560 if (check_repository_format_gently(gitdir, nongit_ok))
561 return NULL;
563 /* --work-tree is set without --git-dir; use discovered one */
564 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
565 if (offset != len && !is_absolute_path(gitdir))
566 gitdir = xstrdup(real_path(gitdir));
567 if (chdir(cwd))
568 die_errno("Could not come back to cwd");
569 return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
572 /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
573 if (is_bare_repository_cfg > 0) {
574 set_git_dir(offset == len ? gitdir : real_path(gitdir));
575 if (chdir(cwd))
576 die_errno("Could not come back to cwd");
577 return NULL;
580 /* #0, #1, #5, #8, #9, #12, #13 */
581 set_git_work_tree(".");
582 if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT))
583 set_git_dir(gitdir);
584 inside_git_dir = 0;
585 inside_work_tree = 1;
586 if (offset == len)
587 return NULL;
589 /* Make "offset" point to past the '/', and add a '/' at the end */
590 offset++;
591 cwd[len++] = '/';
592 cwd[len] = 0;
593 return cwd + offset;
596 /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
597 static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok)
599 int root_len;
601 if (check_repository_format_gently(".", nongit_ok))
602 return NULL;
604 /* --work-tree is set without --git-dir; use discovered one */
605 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
606 const char *gitdir;
608 gitdir = offset == len ? "." : xmemdupz(cwd, offset);
609 if (chdir(cwd))
610 die_errno("Could not come back to cwd");
611 return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
614 inside_git_dir = 1;
615 inside_work_tree = 0;
616 if (offset != len) {
617 if (chdir(cwd))
618 die_errno("Cannot come back to cwd");
619 root_len = offset_1st_component(cwd);
620 cwd[offset > root_len ? offset : root_len] = '\0';
621 set_git_dir(cwd);
623 else
624 set_git_dir(".");
625 return NULL;
628 static const char *setup_nongit(const char *cwd, int *nongit_ok)
630 if (!nongit_ok)
631 die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT);
632 if (chdir(cwd))
633 die_errno("Cannot come back to cwd");
634 *nongit_ok = 1;
635 return NULL;
638 static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len)
640 struct stat buf;
641 if (stat(path, &buf)) {
642 die_errno("failed to stat '%*s%s%s'",
643 prefix_len,
644 prefix ? prefix : "",
645 prefix ? "/" : "", path);
647 return buf.st_dev;
651 * A "string_list_each_func_t" function that canonicalizes an entry
652 * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or
653 * discards it if unusable.
655 static int canonicalize_ceiling_entry(struct string_list_item *item,
656 void *unused)
658 char *ceil = item->string;
659 const char *real_path;
661 if (!*ceil || !is_absolute_path(ceil))
662 return 0;
663 real_path = real_path_if_valid(ceil);
664 if (!real_path)
665 return 0;
666 free(item->string);
667 item->string = xstrdup(real_path);
668 return 1;
672 * We cannot decide in this function whether we are in the work tree or
673 * not, since the config can only be read _after_ this function was called.
675 static const char *setup_git_directory_gently_1(int *nongit_ok)
677 const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
678 struct string_list ceiling_dirs = STRING_LIST_INIT_DUP;
679 static char cwd[PATH_MAX+1];
680 const char *gitdirenv, *ret;
681 char *gitfile;
682 int len, offset, offset_parent, ceil_offset = -1;
683 dev_t current_device = 0;
684 int one_filesystem = 1;
687 * Let's assume that we are in a git repository.
688 * If it turns out later that we are somewhere else, the value will be
689 * updated accordingly.
691 if (nongit_ok)
692 *nongit_ok = 0;
694 if (!getcwd(cwd, sizeof(cwd)-1))
695 die_errno("Unable to read current working directory");
696 offset = len = strlen(cwd);
699 * If GIT_DIR is set explicitly, we're not going
700 * to do any discovery, but we still do repository
701 * validation.
703 gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
704 if (gitdirenv)
705 return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok);
707 if (env_ceiling_dirs) {
708 string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1);
709 filter_string_list(&ceiling_dirs, 0,
710 canonicalize_ceiling_entry, NULL);
711 ceil_offset = longest_ancestor_length(cwd, &ceiling_dirs);
712 string_list_clear(&ceiling_dirs, 0);
715 if (ceil_offset < 0 && has_dos_drive_prefix(cwd))
716 ceil_offset = 1;
719 * Test in the following order (relative to the cwd):
720 * - .git (file containing "gitdir: <path>")
721 * - .git/
722 * - ./ (bare)
723 * - ../.git
724 * - ../.git/
725 * - ../ (bare)
726 * - ../../.git/
727 * etc.
729 one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
730 if (one_filesystem)
731 current_device = get_device_or_die(".", NULL, 0);
732 for (;;) {
733 gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
734 if (gitfile)
735 gitdirenv = gitfile = xstrdup(gitfile);
736 else {
737 if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT))
738 gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
741 if (gitdirenv) {
742 ret = setup_discovered_git_dir(gitdirenv,
743 cwd, offset, len,
744 nongit_ok);
745 free(gitfile);
746 return ret;
748 free(gitfile);
750 if (is_git_directory("."))
751 return setup_bare_git_dir(cwd, offset, len, nongit_ok);
753 offset_parent = offset;
754 while (--offset_parent > ceil_offset && cwd[offset_parent] != '/');
755 if (offset_parent <= ceil_offset)
756 return setup_nongit(cwd, nongit_ok);
757 if (one_filesystem) {
758 dev_t parent_device = get_device_or_die("..", cwd, offset);
759 if (parent_device != current_device) {
760 if (nongit_ok) {
761 if (chdir(cwd))
762 die_errno("Cannot come back to cwd");
763 *nongit_ok = 1;
764 return NULL;
766 cwd[offset] = '\0';
767 die("Not a git repository (or any parent up to mount point %s)\n"
768 "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd);
771 if (chdir("..")) {
772 cwd[offset] = '\0';
773 die_errno("Cannot change to '%s/..'", cwd);
775 offset = offset_parent;
779 const char *setup_git_directory_gently(int *nongit_ok)
781 const char *prefix;
783 prefix = setup_git_directory_gently_1(nongit_ok);
784 if (prefix)
785 setenv("GIT_PREFIX", prefix, 1);
786 else
787 setenv("GIT_PREFIX", "", 1);
789 if (startup_info) {
790 startup_info->have_repository = !nongit_ok || !*nongit_ok;
791 startup_info->prefix = prefix;
793 return prefix;
796 int git_config_perm(const char *var, const char *value)
798 int i;
799 char *endptr;
801 if (value == NULL)
802 return PERM_GROUP;
804 if (!strcmp(value, "umask"))
805 return PERM_UMASK;
806 if (!strcmp(value, "group"))
807 return PERM_GROUP;
808 if (!strcmp(value, "all") ||
809 !strcmp(value, "world") ||
810 !strcmp(value, "everybody"))
811 return PERM_EVERYBODY;
813 /* Parse octal numbers */
814 i = strtol(value, &endptr, 8);
816 /* If not an octal number, maybe true/false? */
817 if (*endptr != 0)
818 return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK;
821 * Treat values 0, 1 and 2 as compatibility cases, otherwise it is
822 * a chmod value to restrict to.
824 switch (i) {
825 case PERM_UMASK: /* 0 */
826 return PERM_UMASK;
827 case OLD_PERM_GROUP: /* 1 */
828 return PERM_GROUP;
829 case OLD_PERM_EVERYBODY: /* 2 */
830 return PERM_EVERYBODY;
833 /* A filemode value was given: 0xxx */
835 if ((i & 0600) != 0600)
836 die("Problem with core.sharedRepository filemode value "
837 "(0%.3o).\nThe owner of files must always have "
838 "read and write permissions.", i);
841 * Mask filemode value. Others can not get write permission.
842 * x flags for directories are handled separately.
844 return -(i & 0666);
847 int check_repository_format_version(const char *var, const char *value, void *cb)
849 if (strcmp(var, "core.repositoryformatversion") == 0)
850 repository_format_version = git_config_int(var, value);
851 else if (strcmp(var, "core.sharedrepository") == 0)
852 shared_repository = git_config_perm(var, value);
853 else if (strcmp(var, "core.bare") == 0) {
854 is_bare_repository_cfg = git_config_bool(var, value);
855 if (is_bare_repository_cfg == 1)
856 inside_work_tree = -1;
857 } else if (strcmp(var, "core.worktree") == 0) {
858 if (!value)
859 return config_error_nonbool(var);
860 free(git_work_tree_cfg);
861 git_work_tree_cfg = xstrdup(value);
862 inside_work_tree = -1;
864 return 0;
867 int check_repository_format(void)
869 return check_repository_format_gently(get_git_dir(), NULL);
873 * Returns the "prefix", a path to the current working directory
874 * relative to the work tree root, or NULL, if the current working
875 * directory is not a strict subdirectory of the work tree root. The
876 * prefix always ends with a '/' character.
878 const char *setup_git_directory(void)
880 return setup_git_directory_gently(NULL);
883 const char *resolve_gitdir(const char *suspect)
885 if (is_git_directory(suspect))
886 return suspect;
887 return read_gitfile(suspect);