4 static int inside_git_dir = -1;
5 static int inside_work_tree = -1;
7 static char *prefix_path_gently(const char *prefix, int len, const char *path)
9 const char *orig = path;
11 if (is_absolute_path(orig)) {
12 const char *temp = real_path(path);
13 sanitized = xmalloc(len + strlen(temp) + 1);
14 strcpy(sanitized, temp);
16 sanitized = xmalloc(len + strlen(path) + 1);
18 memcpy(sanitized, prefix, len);
19 strcpy(sanitized + len, path);
21 if (normalize_path_copy(sanitized, sanitized))
23 if (is_absolute_path(orig)) {
24 size_t root_len, len, total;
25 const char *work_tree = get_git_work_tree();
28 len = strlen(work_tree);
29 root_len = offset_1st_component(work_tree);
30 total = strlen(sanitized) + 1;
31 if (strncmp(sanitized, work_tree, len) ||
32 (len > root_len && sanitized[len] != '\0' && sanitized[len] != '/')) {
37 if (sanitized[len] == '/')
39 memmove(sanitized, sanitized + len, total - len);
44 char *prefix_path(const char *prefix, int len, const char *path)
46 char *r = prefix_path_gently(prefix, len, path);
48 die("'%s' is outside repository", path);
52 int path_inside_repo(const char *prefix, const char *path)
54 int len = prefix ? strlen(prefix) : 0;
55 char *r = prefix_path_gently(prefix, len, path);
63 int check_filename(const char *prefix, const char *arg)
68 name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg;
69 if (!lstat(name, &st))
70 return 1; /* file exists */
71 if (errno == ENOENT || errno == ENOTDIR)
72 return 0; /* file does not exist */
73 die_errno("failed to stat '%s'", arg);
76 static void NORETURN die_verify_filename(const char *prefix, const char *arg)
78 unsigned char sha1[20];
82 * Saying "'(icase)foo' does not exist in the index" when the
83 * user gave us ":(icase)foo" is just stupid. A magic pathspec
84 * begins with a colon and is followed by a non-alnum; do not
85 * let get_sha1_with_mode_1(only_to_die=1) to even trigger.
87 if (!(arg[0] == ':' && !isalnum(arg[1])))
88 /* try a detailed diagnostic ... */
89 get_sha1_with_mode_1(arg, sha1, &mode, 1, prefix);
91 /* ... or fall back the most general message. */
92 die("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
93 "Use '--' to separate paths from revisions", arg);
98 * Verify a filename that we got as an argument for a pathspec
99 * entry. Note that a filename that begins with "-" never verifies
100 * as true, because even if such a filename were to exist, we want
101 * it to be preceded by the "--" marker (or we want the user to
102 * use a format like "./-filename")
104 void verify_filename(const char *prefix, const char *arg)
107 die("bad flag '%s' used after filename", arg);
108 if (check_filename(prefix, arg))
110 die_verify_filename(prefix, arg);
114 * Opposite of the above: the command line did not have -- marker
115 * and we parsed the arg as a refname. It should not be interpretable
118 void verify_non_filename(const char *prefix, const char *arg)
120 if (!is_inside_work_tree() || is_inside_git_dir())
124 if (!check_filename(prefix, arg))
126 die("ambiguous argument '%s': both revision and filename\n"
127 "Use '--' to separate filenames from revisions", arg);
133 * NEEDSWORK: These need to be moved to dir.h or even to a new
134 * pathspec.h when we restructure get_pathspec() users to use the
135 * "struct pathspec" interface.
137 * Possible future magic semantics include stuff like:
139 * { PATHSPEC_NOGLOB, '!', "noglob" },
140 * { PATHSPEC_ICASE, '\0', "icase" },
141 * { PATHSPEC_RECURSIVE, '*', "recursive" },
142 * { PATHSPEC_REGEXP, '\0', "regexp" },
145 #define PATHSPEC_FROMTOP (1<<0)
147 static struct pathspec_magic {
149 char mnemonic; /* this cannot be ':'! */
151 } pathspec_magic[] = {
152 { PATHSPEC_FROMTOP, '/', "top" },
156 * Take an element of a pathspec and check for magic signatures.
157 * Append the result to the prefix.
159 * For now, we only parse the syntax and throw out anything other than
162 * NEEDSWORK: This needs to be rewritten when we start migrating
163 * get_pathspec() users to use the "struct pathspec" interface. For
164 * example, a pathspec element may be marked as case-insensitive, but
165 * the prefix part must always match literally, and a single stupid
166 * string cannot express such a case.
168 static const char *prefix_pathspec(const char *prefix, int prefixlen, const char *elt)
171 const char *copyfrom = elt;
175 ; /* nothing to do */
176 } else if (elt[1] == '(') {
179 for (copyfrom = elt + 2;
180 *copyfrom && *copyfrom != ')';
182 size_t len = strcspn(copyfrom, ",)");
183 if (copyfrom[len] == ')')
184 nextat = copyfrom + len;
186 nextat = copyfrom + len + 1;
189 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
190 if (strlen(pathspec_magic[i].name) == len &&
191 !strncmp(pathspec_magic[i].name, copyfrom, len)) {
192 magic |= pathspec_magic[i].bit;
195 if (ARRAY_SIZE(pathspec_magic) <= i)
196 die("Invalid pathspec magic '%.*s' in '%s'",
197 (int) len, copyfrom, elt);
199 if (*copyfrom == ')')
203 for (copyfrom = elt + 1;
204 *copyfrom && *copyfrom != ':';
208 if (!is_pathspec_magic(ch))
210 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
211 if (pathspec_magic[i].mnemonic == ch) {
212 magic |= pathspec_magic[i].bit;
215 if (ARRAY_SIZE(pathspec_magic) <= i)
216 die("Unimplemented pathspec magic '%c' in '%s'",
219 if (*copyfrom == ':')
223 if (magic & PATHSPEC_FROMTOP)
224 return xstrdup(copyfrom);
226 return prefix_path(prefix, prefixlen, copyfrom);
229 const char **get_pathspec(const char *prefix, const char **pathspec)
231 const char *entry = *pathspec;
232 const char **src, **dst;
235 if (!prefix && !entry)
239 static const char *spec[2];
245 /* Otherwise we have to re-write the entries.. */
248 prefixlen = prefix ? strlen(prefix) : 0;
250 *(dst++) = prefix_pathspec(prefix, prefixlen, *src);
260 * Test if it looks like we're at a git directory.
263 * - either an objects/ directory _or_ the proper
264 * GIT_OBJECT_DIRECTORY environment variable
265 * - a refs/ directory
266 * - either a HEAD symlink or a HEAD file that is formatted as
267 * a proper "ref:", or a regular file HEAD that has a properly
268 * formatted sha1 object name.
270 int is_git_directory(const char *suspect)
273 size_t len = strlen(suspect);
275 if (PATH_MAX <= len + strlen("/objects"))
276 die("Too long path: %.*s", 60, suspect);
277 strcpy(path, suspect);
278 if (getenv(DB_ENVIRONMENT)) {
279 if (access(getenv(DB_ENVIRONMENT), X_OK))
283 strcpy(path + len, "/objects");
284 if (access(path, X_OK))
288 strcpy(path + len, "/refs");
289 if (access(path, X_OK))
292 strcpy(path + len, "/HEAD");
293 if (validate_headref(path))
299 int is_inside_git_dir(void)
301 if (inside_git_dir < 0)
302 inside_git_dir = is_inside_dir(get_git_dir());
303 return inside_git_dir;
306 int is_inside_work_tree(void)
308 if (inside_work_tree < 0)
309 inside_work_tree = is_inside_dir(get_git_work_tree());
310 return inside_work_tree;
313 void setup_work_tree(void)
315 const char *work_tree, *git_dir;
316 static int initialized = 0;
320 work_tree = get_git_work_tree();
321 git_dir = get_git_dir();
322 if (!is_absolute_path(git_dir))
323 git_dir = real_path(get_git_dir());
324 if (!work_tree || chdir(work_tree))
325 die("This operation must be run in a work tree");
328 * Make sure subsequent git processes find correct worktree
329 * if $GIT_WORK_TREE is set relative
331 if (getenv(GIT_WORK_TREE_ENVIRONMENT))
332 setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1);
334 set_git_dir(relative_path(git_dir, work_tree));
338 static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
340 char repo_config[PATH_MAX+1];
343 * git_config() can't be used here because it calls git_pathdup()
344 * to get $GIT_CONFIG/config. That call will make setup_git_env()
345 * set git_dir to ".git".
347 * We are in gitdir setup, no git dir has been found useable yet.
348 * Use a gentler version of git_config() to check if this repo
351 snprintf(repo_config, PATH_MAX, "%s/config", gitdir);
352 git_config_early(check_repository_format_version, NULL, repo_config);
353 if (GIT_REPO_VERSION < repository_format_version) {
355 die ("Expected git repo version <= %d, found %d",
356 GIT_REPO_VERSION, repository_format_version);
357 warning("Expected git repo version <= %d, found %d",
358 GIT_REPO_VERSION, repository_format_version);
359 warning("Please upgrade Git");
367 * Try to read the location of the git directory from the .git file,
368 * return path to git directory if found.
370 const char *read_gitfile(const char *path)
381 if (!S_ISREG(st.st_mode))
383 fd = open(path, O_RDONLY);
385 die_errno("Error opening '%s'", path);
386 buf = xmalloc(st.st_size + 1);
387 len = read_in_full(fd, buf, st.st_size);
389 if (len != st.st_size)
390 die("Error reading %s", path);
392 if (prefixcmp(buf, "gitdir: "))
393 die("Invalid gitfile format: %s", path);
394 while (buf[len - 1] == '\n' || buf[len - 1] == '\r')
397 die("No path in gitfile: %s", path);
401 if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) {
402 size_t pathlen = slash+1 - path;
403 size_t dirlen = pathlen + len - 8;
404 dir = xmalloc(dirlen + 1);
405 strncpy(dir, path, pathlen);
406 strncpy(dir + pathlen, buf + 8, len - 8);
412 if (!is_git_directory(dir))
413 die("Not a git repository: %s", dir);
414 path = real_path(dir);
420 static const char *setup_explicit_git_dir(const char *gitdirenv,
424 const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
425 const char *worktree;
429 if (PATH_MAX - 40 < strlen(gitdirenv))
430 die("'$%s' too big", GIT_DIR_ENVIRONMENT);
432 gitfile = (char*)read_gitfile(gitdirenv);
434 gitfile = xstrdup(gitfile);
438 if (!is_git_directory(gitdirenv)) {
444 die("Not a git repository: '%s'", gitdirenv);
447 if (check_repository_format_gently(gitdirenv, nongit_ok)) {
452 /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
454 set_git_work_tree(work_tree_env);
455 else if (is_bare_repository_cfg > 0) {
456 if (git_work_tree_cfg) /* #22.2, #30 */
457 die("core.bare and core.worktree do not make sense");
460 set_git_dir(gitdirenv);
464 else if (git_work_tree_cfg) { /* #6, #14 */
465 if (is_absolute_path(git_work_tree_cfg))
466 set_git_work_tree(git_work_tree_cfg);
468 char core_worktree[PATH_MAX];
469 if (chdir(gitdirenv))
470 die_errno("Could not chdir to '%s'", gitdirenv);
471 if (chdir(git_work_tree_cfg))
472 die_errno("Could not chdir to '%s'", git_work_tree_cfg);
473 if (!getcwd(core_worktree, PATH_MAX))
474 die_errno("Could not get directory '%s'", git_work_tree_cfg);
476 die_errno("Could not come back to cwd");
477 set_git_work_tree(core_worktree);
481 set_git_work_tree(".");
483 /* set_git_work_tree() must have been called by now */
484 worktree = get_git_work_tree();
486 /* both get_git_work_tree() and cwd are already normalized */
487 if (!strcmp(cwd, worktree)) { /* cwd == worktree */
488 set_git_dir(gitdirenv);
493 offset = dir_inside_of(cwd, worktree);
494 if (offset >= 0) { /* cwd inside worktree? */
495 set_git_dir(real_path(gitdirenv));
497 die_errno("Could not chdir to '%s'", worktree);
504 /* cwd outside worktree */
505 set_git_dir(gitdirenv);
510 static const char *setup_discovered_git_dir(const char *gitdir,
511 char *cwd, int offset, int len,
514 if (check_repository_format_gently(gitdir, nongit_ok))
517 /* --work-tree is set without --git-dir; use discovered one */
518 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
519 if (offset != len && !is_absolute_path(gitdir))
520 gitdir = xstrdup(real_path(gitdir));
522 die_errno("Could not come back to cwd");
523 return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
526 /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
527 if (is_bare_repository_cfg > 0) {
528 set_git_dir(offset == len ? gitdir : real_path(gitdir));
530 die_errno("Could not come back to cwd");
534 /* #0, #1, #5, #8, #9, #12, #13 */
535 set_git_work_tree(".");
536 if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT))
539 inside_work_tree = 1;
543 /* Make "offset" point to past the '/', and add a '/' at the end */
550 /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
551 static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok)
555 if (check_repository_format_gently(".", nongit_ok))
558 /* --work-tree is set without --git-dir; use discovered one */
559 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
562 gitdir = offset == len ? "." : xmemdupz(cwd, offset);
564 die_errno("Could not come back to cwd");
565 return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
569 inside_work_tree = 0;
572 die_errno("Cannot come back to cwd");
573 root_len = offset_1st_component(cwd);
574 cwd[offset > root_len ? offset : root_len] = '\0';
582 static const char *setup_nongit(const char *cwd, int *nongit_ok)
585 die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT);
587 die_errno("Cannot come back to cwd");
592 static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len)
595 if (stat(path, &buf)) {
596 die_errno("failed to stat '%*s%s%s'",
598 prefix ? prefix : "",
599 prefix ? "/" : "", path);
605 * We cannot decide in this function whether we are in the work tree or
606 * not, since the config can only be read _after_ this function was called.
608 static const char *setup_git_directory_gently_1(int *nongit_ok)
610 const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
611 static char cwd[PATH_MAX+1];
612 const char *gitdirenv, *ret;
614 int len, offset, offset_parent, ceil_offset;
615 dev_t current_device = 0;
616 int one_filesystem = 1;
619 * Let's assume that we are in a git repository.
620 * If it turns out later that we are somewhere else, the value will be
621 * updated accordingly.
626 if (!getcwd(cwd, sizeof(cwd)-1))
627 die_errno("Unable to read current working directory");
628 offset = len = strlen(cwd);
631 * If GIT_DIR is set explicitly, we're not going
632 * to do any discovery, but we still do repository
635 gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
637 return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok);
639 ceil_offset = longest_ancestor_length(cwd, env_ceiling_dirs);
640 if (ceil_offset < 0 && has_dos_drive_prefix(cwd))
644 * Test in the following order (relative to the cwd):
645 * - .git (file containing "gitdir: <path>")
654 one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
656 current_device = get_device_or_die(".", NULL, 0);
658 gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
660 gitdirenv = gitfile = xstrdup(gitfile);
662 if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT))
663 gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
667 ret = setup_discovered_git_dir(gitdirenv,
675 if (is_git_directory("."))
676 return setup_bare_git_dir(cwd, offset, len, nongit_ok);
678 offset_parent = offset;
679 while (--offset_parent > ceil_offset && cwd[offset_parent] != '/');
680 if (offset_parent <= ceil_offset)
681 return setup_nongit(cwd, nongit_ok);
682 if (one_filesystem) {
683 dev_t parent_device = get_device_or_die("..", cwd, offset);
684 if (parent_device != current_device) {
687 die_errno("Cannot come back to cwd");
692 die("Not a git repository (or any parent up to mount point %s)\n"
693 "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd);
698 die_errno("Cannot change to '%s/..'", cwd);
700 offset = offset_parent;
704 const char *setup_git_directory_gently(int *nongit_ok)
708 prefix = setup_git_directory_gently_1(nongit_ok);
710 setenv("GIT_PREFIX", prefix, 1);
712 setenv("GIT_PREFIX", "", 1);
715 startup_info->have_repository = !nongit_ok || !*nongit_ok;
716 startup_info->prefix = prefix;
721 int git_config_perm(const char *var, const char *value)
729 if (!strcmp(value, "umask"))
731 if (!strcmp(value, "group"))
733 if (!strcmp(value, "all") ||
734 !strcmp(value, "world") ||
735 !strcmp(value, "everybody"))
736 return PERM_EVERYBODY;
738 /* Parse octal numbers */
739 i = strtol(value, &endptr, 8);
741 /* If not an octal number, maybe true/false? */
743 return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK;
746 * Treat values 0, 1 and 2 as compatibility cases, otherwise it is
747 * a chmod value to restrict to.
750 case PERM_UMASK: /* 0 */
752 case OLD_PERM_GROUP: /* 1 */
754 case OLD_PERM_EVERYBODY: /* 2 */
755 return PERM_EVERYBODY;
758 /* A filemode value was given: 0xxx */
760 if ((i & 0600) != 0600)
761 die("Problem with core.sharedRepository filemode value "
762 "(0%.3o).\nThe owner of files must always have "
763 "read and write permissions.", i);
766 * Mask filemode value. Others can not get write permission.
767 * x flags for directories are handled separately.
772 int check_repository_format_version(const char *var, const char *value, void *cb)
774 if (strcmp(var, "core.repositoryformatversion") == 0)
775 repository_format_version = git_config_int(var, value);
776 else if (strcmp(var, "core.sharedrepository") == 0)
777 shared_repository = git_config_perm(var, value);
778 else if (strcmp(var, "core.bare") == 0) {
779 is_bare_repository_cfg = git_config_bool(var, value);
780 if (is_bare_repository_cfg == 1)
781 inside_work_tree = -1;
782 } else if (strcmp(var, "core.worktree") == 0) {
784 return config_error_nonbool(var);
785 free(git_work_tree_cfg);
786 git_work_tree_cfg = xstrdup(value);
787 inside_work_tree = -1;
792 int check_repository_format(void)
794 return check_repository_format_gently(get_git_dir(), NULL);
798 * Returns the "prefix", a path to the current working directory
799 * relative to the work tree root, or NULL, if the current working
800 * directory is not a strict subdirectory of the work tree root. The
801 * prefix always ends with a '/' character.
803 const char *setup_git_directory(void)
805 return setup_git_directory_gently(NULL);
808 const char *resolve_gitdir(const char *suspect)
810 if (is_git_directory(suspect))
812 return read_gitfile(suspect);