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![Junio C Hamano](/assets/img/avatar_default.png)
When giving arguments without "--" disambiguation, object names that come earlier on the command line must not be interpretable as pathspecs and pathspecs that come later on the command line must not be interpretable as object names. Tweak the disambiguation rule so that ":/" (no other string before or after) is always interpreted as a pathspec, to avoid having to say "git cmd -- :/". * nd/magic-pathspec-from-root: grep: avoid accepting ambiguous revision Update :/abc ambiguity check
889 lines
23 KiB
C
889 lines
23 KiB
C
#include "cache.h"
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#include "dir.h"
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#include "string-list.h"
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static int inside_git_dir = -1;
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static int inside_work_tree = -1;
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static char *prefix_path_gently(const char *prefix, int len, const char *path)
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{
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const char *orig = path;
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char *sanitized;
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if (is_absolute_path(orig)) {
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const char *temp = real_path(path);
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sanitized = xmalloc(len + strlen(temp) + 1);
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strcpy(sanitized, temp);
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} else {
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sanitized = xmalloc(len + strlen(path) + 1);
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if (len)
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memcpy(sanitized, prefix, len);
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strcpy(sanitized + len, path);
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}
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if (normalize_path_copy(sanitized, sanitized))
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goto error_out;
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if (is_absolute_path(orig)) {
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size_t root_len, len, total;
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const char *work_tree = get_git_work_tree();
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if (!work_tree)
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goto error_out;
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len = strlen(work_tree);
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root_len = offset_1st_component(work_tree);
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total = strlen(sanitized) + 1;
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if (strncmp(sanitized, work_tree, len) ||
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(len > root_len && sanitized[len] != '\0' && sanitized[len] != '/')) {
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error_out:
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free(sanitized);
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return NULL;
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}
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if (sanitized[len] == '/')
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len++;
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memmove(sanitized, sanitized + len, total - len);
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}
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return sanitized;
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}
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char *prefix_path(const char *prefix, int len, const char *path)
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{
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char *r = prefix_path_gently(prefix, len, path);
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if (!r)
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die("'%s' is outside repository", path);
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return r;
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}
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int path_inside_repo(const char *prefix, const char *path)
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{
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int len = prefix ? strlen(prefix) : 0;
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char *r = prefix_path_gently(prefix, len, path);
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if (r) {
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free(r);
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return 1;
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}
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return 0;
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}
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int check_filename(const char *prefix, const char *arg)
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{
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const char *name;
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struct stat st;
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if (!prefixcmp(arg, ":/")) {
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if (arg[2] == '\0') /* ":/" is root dir, always exists */
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return 1;
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name = arg + 2;
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} else if (prefix)
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name = prefix_filename(prefix, strlen(prefix), arg);
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else
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name = arg;
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if (!lstat(name, &st))
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return 1; /* file exists */
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if (errno == ENOENT || errno == ENOTDIR)
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return 0; /* file does not exist */
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die_errno("failed to stat '%s'", arg);
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}
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static void NORETURN die_verify_filename(const char *prefix,
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const char *arg,
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int diagnose_misspelt_rev)
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{
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if (!diagnose_misspelt_rev)
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die("%s: no such path in the working tree.\n"
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"Use 'git <command> -- <path>...' to specify paths that do not exist locally.",
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arg);
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/*
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* Saying "'(icase)foo' does not exist in the index" when the
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* user gave us ":(icase)foo" is just stupid. A magic pathspec
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* begins with a colon and is followed by a non-alnum; do not
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* let maybe_die_on_misspelt_object_name() even trigger.
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*/
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if (!(arg[0] == ':' && !isalnum(arg[1])))
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maybe_die_on_misspelt_object_name(arg, prefix);
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/* ... or fall back the most general message. */
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die("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
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"Use '--' to separate paths from revisions, like this:\n"
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"'git <command> [<revision>...] -- [<file>...]'", arg);
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}
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/*
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* Verify a filename that we got as an argument for a pathspec
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* entry. Note that a filename that begins with "-" never verifies
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* as true, because even if such a filename were to exist, we want
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* it to be preceded by the "--" marker (or we want the user to
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* use a format like "./-filename")
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*
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* The "diagnose_misspelt_rev" is used to provide a user-friendly
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* diagnosis when dying upon finding that "name" is not a pathname.
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* If set to 1, the diagnosis will try to diagnose "name" as an
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* invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis
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* will only complain about an inexisting file.
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*
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* This function is typically called to check that a "file or rev"
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* argument is unambiguous. In this case, the caller will want
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* diagnose_misspelt_rev == 1 when verifying the first non-rev
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* argument (which could have been a revision), and
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* diagnose_misspelt_rev == 0 for the next ones (because we already
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* saw a filename, there's not ambiguity anymore).
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*/
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void verify_filename(const char *prefix,
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const char *arg,
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int diagnose_misspelt_rev)
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{
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if (*arg == '-')
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die("bad flag '%s' used after filename", arg);
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if (check_filename(prefix, arg))
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return;
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die_verify_filename(prefix, arg, diagnose_misspelt_rev);
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}
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/*
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* Opposite of the above: the command line did not have -- marker
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* and we parsed the arg as a refname. It should not be interpretable
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* as a filename.
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*/
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void verify_non_filename(const char *prefix, const char *arg)
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{
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if (!is_inside_work_tree() || is_inside_git_dir())
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return;
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if (*arg == '-')
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return; /* flag */
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if (!check_filename(prefix, arg))
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return;
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die("ambiguous argument '%s': both revision and filename\n"
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"Use '--' to separate paths from revisions, like this:\n"
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"'git <command> [<revision>...] -- [<file>...]'", arg);
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}
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/*
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* Magic pathspec
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*
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* NEEDSWORK: These need to be moved to dir.h or even to a new
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* pathspec.h when we restructure get_pathspec() users to use the
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* "struct pathspec" interface.
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*
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* Possible future magic semantics include stuff like:
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*
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* { PATHSPEC_NOGLOB, '!', "noglob" },
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* { PATHSPEC_ICASE, '\0', "icase" },
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* { PATHSPEC_RECURSIVE, '*', "recursive" },
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* { PATHSPEC_REGEXP, '\0', "regexp" },
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*
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*/
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#define PATHSPEC_FROMTOP (1<<0)
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static struct pathspec_magic {
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unsigned bit;
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char mnemonic; /* this cannot be ':'! */
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const char *name;
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} pathspec_magic[] = {
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{ PATHSPEC_FROMTOP, '/', "top" },
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};
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/*
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* Take an element of a pathspec and check for magic signatures.
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* Append the result to the prefix.
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*
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* For now, we only parse the syntax and throw out anything other than
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* "top" magic.
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*
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* NEEDSWORK: This needs to be rewritten when we start migrating
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* get_pathspec() users to use the "struct pathspec" interface. For
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* example, a pathspec element may be marked as case-insensitive, but
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* the prefix part must always match literally, and a single stupid
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* string cannot express such a case.
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*/
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static const char *prefix_pathspec(const char *prefix, int prefixlen, const char *elt)
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{
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unsigned magic = 0;
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const char *copyfrom = elt;
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int i;
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if (elt[0] != ':') {
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; /* nothing to do */
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} else if (elt[1] == '(') {
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/* longhand */
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const char *nextat;
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for (copyfrom = elt + 2;
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*copyfrom && *copyfrom != ')';
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copyfrom = nextat) {
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size_t len = strcspn(copyfrom, ",)");
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if (copyfrom[len] == ')')
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nextat = copyfrom + len;
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else
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nextat = copyfrom + len + 1;
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if (!len)
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continue;
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for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
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if (strlen(pathspec_magic[i].name) == len &&
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!strncmp(pathspec_magic[i].name, copyfrom, len)) {
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magic |= pathspec_magic[i].bit;
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break;
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}
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if (ARRAY_SIZE(pathspec_magic) <= i)
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die("Invalid pathspec magic '%.*s' in '%s'",
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(int) len, copyfrom, elt);
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}
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if (*copyfrom == ')')
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copyfrom++;
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} else {
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/* shorthand */
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for (copyfrom = elt + 1;
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*copyfrom && *copyfrom != ':';
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copyfrom++) {
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char ch = *copyfrom;
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if (!is_pathspec_magic(ch))
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break;
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for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
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if (pathspec_magic[i].mnemonic == ch) {
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magic |= pathspec_magic[i].bit;
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break;
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}
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if (ARRAY_SIZE(pathspec_magic) <= i)
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die("Unimplemented pathspec magic '%c' in '%s'",
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ch, elt);
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}
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if (*copyfrom == ':')
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copyfrom++;
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}
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if (magic & PATHSPEC_FROMTOP)
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return xstrdup(copyfrom);
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else
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return prefix_path(prefix, prefixlen, copyfrom);
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}
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/*
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* N.B. get_pathspec() is deprecated in favor of the "struct pathspec"
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* based interface - see pathspec_magic above.
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*
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* Arguments:
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* - prefix - a path relative to the root of the working tree
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* - pathspec - a list of paths underneath the prefix path
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*
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* Iterates over pathspec, prepending each path with prefix,
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* and return the resulting list.
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*
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* If pathspec is empty, return a singleton list containing prefix.
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*
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* If pathspec and prefix are both empty, return an empty list.
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*
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* This is typically used by built-in commands such as add.c, in order
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* to normalize argv arguments provided to the built-in into a list of
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* paths to process, all relative to the root of the working tree.
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*/
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const char **get_pathspec(const char *prefix, const char **pathspec)
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{
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const char *entry = *pathspec;
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const char **src, **dst;
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int prefixlen;
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if (!prefix && !entry)
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return NULL;
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if (!entry) {
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static const char *spec[2];
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spec[0] = prefix;
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spec[1] = NULL;
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return spec;
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}
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/* Otherwise we have to re-write the entries.. */
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src = pathspec;
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dst = pathspec;
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prefixlen = prefix ? strlen(prefix) : 0;
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while (*src) {
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*(dst++) = prefix_pathspec(prefix, prefixlen, *src);
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src++;
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}
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*dst = NULL;
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if (!*pathspec)
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return NULL;
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return pathspec;
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}
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/*
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* Test if it looks like we're at a git directory.
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* We want to see:
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*
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* - either an objects/ directory _or_ the proper
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* GIT_OBJECT_DIRECTORY environment variable
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* - a refs/ directory
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* - either a HEAD symlink or a HEAD file that is formatted as
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* a proper "ref:", or a regular file HEAD that has a properly
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* formatted sha1 object name.
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*/
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int is_git_directory(const char *suspect)
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{
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char path[PATH_MAX];
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size_t len = strlen(suspect);
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if (PATH_MAX <= len + strlen("/objects"))
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die("Too long path: %.*s", 60, suspect);
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strcpy(path, suspect);
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if (getenv(DB_ENVIRONMENT)) {
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if (access(getenv(DB_ENVIRONMENT), X_OK))
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return 0;
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}
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else {
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strcpy(path + len, "/objects");
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if (access(path, X_OK))
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return 0;
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}
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strcpy(path + len, "/refs");
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if (access(path, X_OK))
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return 0;
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strcpy(path + len, "/HEAD");
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if (validate_headref(path))
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return 0;
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return 1;
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}
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int is_inside_git_dir(void)
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{
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if (inside_git_dir < 0)
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inside_git_dir = is_inside_dir(get_git_dir());
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return inside_git_dir;
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}
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int is_inside_work_tree(void)
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{
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if (inside_work_tree < 0)
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inside_work_tree = is_inside_dir(get_git_work_tree());
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return inside_work_tree;
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}
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void setup_work_tree(void)
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{
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const char *work_tree, *git_dir;
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static int initialized = 0;
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if (initialized)
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return;
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work_tree = get_git_work_tree();
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git_dir = get_git_dir();
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if (!is_absolute_path(git_dir))
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git_dir = real_path(get_git_dir());
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if (!work_tree || chdir(work_tree))
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die("This operation must be run in a work tree");
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/*
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* Make sure subsequent git processes find correct worktree
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* if $GIT_WORK_TREE is set relative
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*/
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if (getenv(GIT_WORK_TREE_ENVIRONMENT))
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setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1);
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set_git_dir(relative_path(git_dir, work_tree));
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initialized = 1;
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}
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static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
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{
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char repo_config[PATH_MAX+1];
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/*
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* git_config() can't be used here because it calls git_pathdup()
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* to get $GIT_CONFIG/config. That call will make setup_git_env()
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* set git_dir to ".git".
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*
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* We are in gitdir setup, no git dir has been found useable yet.
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* Use a gentler version of git_config() to check if this repo
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* is a good one.
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*/
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snprintf(repo_config, PATH_MAX, "%s/config", gitdir);
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git_config_early(check_repository_format_version, NULL, repo_config);
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if (GIT_REPO_VERSION < repository_format_version) {
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if (!nongit_ok)
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die ("Expected git repo version <= %d, found %d",
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GIT_REPO_VERSION, repository_format_version);
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warning("Expected git repo version <= %d, found %d",
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GIT_REPO_VERSION, repository_format_version);
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warning("Please upgrade Git");
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*nongit_ok = -1;
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return -1;
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}
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return 0;
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}
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/*
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* Try to read the location of the git directory from the .git file,
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* return path to git directory if found.
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*/
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const char *read_gitfile(const char *path)
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{
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char *buf;
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char *dir;
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const char *slash;
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struct stat st;
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int fd;
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ssize_t len;
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if (stat(path, &st))
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return NULL;
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if (!S_ISREG(st.st_mode))
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return NULL;
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fd = open(path, O_RDONLY);
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if (fd < 0)
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die_errno("Error opening '%s'", path);
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buf = xmalloc(st.st_size + 1);
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len = read_in_full(fd, buf, st.st_size);
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close(fd);
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if (len != st.st_size)
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die("Error reading %s", path);
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buf[len] = '\0';
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if (prefixcmp(buf, "gitdir: "))
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die("Invalid gitfile format: %s", path);
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while (buf[len - 1] == '\n' || buf[len - 1] == '\r')
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len--;
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if (len < 9)
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die("No path in gitfile: %s", path);
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buf[len] = '\0';
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dir = buf + 8;
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if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) {
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size_t pathlen = slash+1 - path;
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size_t dirlen = pathlen + len - 8;
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dir = xmalloc(dirlen + 1);
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strncpy(dir, path, pathlen);
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strncpy(dir + pathlen, buf + 8, len - 8);
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dir[dirlen] = '\0';
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free(buf);
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buf = dir;
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}
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if (!is_git_directory(dir))
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die("Not a git repository: %s", dir);
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path = real_path(dir);
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free(buf);
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return path;
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}
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static const char *setup_explicit_git_dir(const char *gitdirenv,
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char *cwd, int len,
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int *nongit_ok)
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{
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const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
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const char *worktree;
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char *gitfile;
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int offset;
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if (PATH_MAX - 40 < strlen(gitdirenv))
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die("'$%s' too big", GIT_DIR_ENVIRONMENT);
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gitfile = (char*)read_gitfile(gitdirenv);
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if (gitfile) {
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gitfile = xstrdup(gitfile);
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gitdirenv = gitfile;
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}
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if (!is_git_directory(gitdirenv)) {
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if (nongit_ok) {
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*nongit_ok = 1;
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free(gitfile);
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return NULL;
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}
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die("Not a git repository: '%s'", gitdirenv);
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}
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if (check_repository_format_gently(gitdirenv, nongit_ok)) {
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free(gitfile);
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return NULL;
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}
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/* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
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if (work_tree_env)
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set_git_work_tree(work_tree_env);
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else if (is_bare_repository_cfg > 0) {
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if (git_work_tree_cfg) /* #22.2, #30 */
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die("core.bare and core.worktree do not make sense");
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|
|
/* #18, #26 */
|
|
set_git_dir(gitdirenv);
|
|
free(gitfile);
|
|
return NULL;
|
|
}
|
|
else if (git_work_tree_cfg) { /* #6, #14 */
|
|
if (is_absolute_path(git_work_tree_cfg))
|
|
set_git_work_tree(git_work_tree_cfg);
|
|
else {
|
|
char core_worktree[PATH_MAX];
|
|
if (chdir(gitdirenv))
|
|
die_errno("Could not chdir to '%s'", gitdirenv);
|
|
if (chdir(git_work_tree_cfg))
|
|
die_errno("Could not chdir to '%s'", git_work_tree_cfg);
|
|
if (!getcwd(core_worktree, PATH_MAX))
|
|
die_errno("Could not get directory '%s'", git_work_tree_cfg);
|
|
if (chdir(cwd))
|
|
die_errno("Could not come back to cwd");
|
|
set_git_work_tree(core_worktree);
|
|
}
|
|
}
|
|
else /* #2, #10 */
|
|
set_git_work_tree(".");
|
|
|
|
/* set_git_work_tree() must have been called by now */
|
|
worktree = get_git_work_tree();
|
|
|
|
/* both get_git_work_tree() and cwd are already normalized */
|
|
if (!strcmp(cwd, worktree)) { /* cwd == worktree */
|
|
set_git_dir(gitdirenv);
|
|
free(gitfile);
|
|
return NULL;
|
|
}
|
|
|
|
offset = dir_inside_of(cwd, worktree);
|
|
if (offset >= 0) { /* cwd inside worktree? */
|
|
set_git_dir(real_path(gitdirenv));
|
|
if (chdir(worktree))
|
|
die_errno("Could not chdir to '%s'", worktree);
|
|
cwd[len++] = '/';
|
|
cwd[len] = '\0';
|
|
free(gitfile);
|
|
return cwd + offset;
|
|
}
|
|
|
|
/* cwd outside worktree */
|
|
set_git_dir(gitdirenv);
|
|
free(gitfile);
|
|
return NULL;
|
|
}
|
|
|
|
static const char *setup_discovered_git_dir(const char *gitdir,
|
|
char *cwd, int offset, int len,
|
|
int *nongit_ok)
|
|
{
|
|
if (check_repository_format_gently(gitdir, nongit_ok))
|
|
return NULL;
|
|
|
|
/* --work-tree is set without --git-dir; use discovered one */
|
|
if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
|
|
if (offset != len && !is_absolute_path(gitdir))
|
|
gitdir = xstrdup(real_path(gitdir));
|
|
if (chdir(cwd))
|
|
die_errno("Could not come back to cwd");
|
|
return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
|
|
}
|
|
|
|
/* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
|
|
if (is_bare_repository_cfg > 0) {
|
|
set_git_dir(offset == len ? gitdir : real_path(gitdir));
|
|
if (chdir(cwd))
|
|
die_errno("Could not come back to cwd");
|
|
return NULL;
|
|
}
|
|
|
|
/* #0, #1, #5, #8, #9, #12, #13 */
|
|
set_git_work_tree(".");
|
|
if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT))
|
|
set_git_dir(gitdir);
|
|
inside_git_dir = 0;
|
|
inside_work_tree = 1;
|
|
if (offset == len)
|
|
return NULL;
|
|
|
|
/* Make "offset" point to past the '/', and add a '/' at the end */
|
|
offset++;
|
|
cwd[len++] = '/';
|
|
cwd[len] = 0;
|
|
return cwd + offset;
|
|
}
|
|
|
|
/* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
|
|
static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok)
|
|
{
|
|
int root_len;
|
|
|
|
if (check_repository_format_gently(".", nongit_ok))
|
|
return NULL;
|
|
|
|
/* --work-tree is set without --git-dir; use discovered one */
|
|
if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
|
|
const char *gitdir;
|
|
|
|
gitdir = offset == len ? "." : xmemdupz(cwd, offset);
|
|
if (chdir(cwd))
|
|
die_errno("Could not come back to cwd");
|
|
return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
|
|
}
|
|
|
|
inside_git_dir = 1;
|
|
inside_work_tree = 0;
|
|
if (offset != len) {
|
|
if (chdir(cwd))
|
|
die_errno("Cannot come back to cwd");
|
|
root_len = offset_1st_component(cwd);
|
|
cwd[offset > root_len ? offset : root_len] = '\0';
|
|
set_git_dir(cwd);
|
|
}
|
|
else
|
|
set_git_dir(".");
|
|
return NULL;
|
|
}
|
|
|
|
static const char *setup_nongit(const char *cwd, int *nongit_ok)
|
|
{
|
|
if (!nongit_ok)
|
|
die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT);
|
|
if (chdir(cwd))
|
|
die_errno("Cannot come back to cwd");
|
|
*nongit_ok = 1;
|
|
return NULL;
|
|
}
|
|
|
|
static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len)
|
|
{
|
|
struct stat buf;
|
|
if (stat(path, &buf)) {
|
|
die_errno("failed to stat '%*s%s%s'",
|
|
prefix_len,
|
|
prefix ? prefix : "",
|
|
prefix ? "/" : "", path);
|
|
}
|
|
return buf.st_dev;
|
|
}
|
|
|
|
/*
|
|
* A "string_list_each_func_t" function that canonicalizes an entry
|
|
* from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or
|
|
* discards it if unusable.
|
|
*/
|
|
static int canonicalize_ceiling_entry(struct string_list_item *item,
|
|
void *unused)
|
|
{
|
|
char *ceil = item->string;
|
|
const char *real_path;
|
|
|
|
if (!*ceil || !is_absolute_path(ceil))
|
|
return 0;
|
|
real_path = real_path_if_valid(ceil);
|
|
if (!real_path)
|
|
return 0;
|
|
free(item->string);
|
|
item->string = xstrdup(real_path);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* We cannot decide in this function whether we are in the work tree or
|
|
* not, since the config can only be read _after_ this function was called.
|
|
*/
|
|
static const char *setup_git_directory_gently_1(int *nongit_ok)
|
|
{
|
|
const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
|
|
struct string_list ceiling_dirs = STRING_LIST_INIT_DUP;
|
|
static char cwd[PATH_MAX+1];
|
|
const char *gitdirenv, *ret;
|
|
char *gitfile;
|
|
int len, offset, offset_parent, ceil_offset = -1;
|
|
dev_t current_device = 0;
|
|
int one_filesystem = 1;
|
|
|
|
/*
|
|
* Let's assume that we are in a git repository.
|
|
* If it turns out later that we are somewhere else, the value will be
|
|
* updated accordingly.
|
|
*/
|
|
if (nongit_ok)
|
|
*nongit_ok = 0;
|
|
|
|
if (!getcwd(cwd, sizeof(cwd)-1))
|
|
die_errno("Unable to read current working directory");
|
|
offset = len = strlen(cwd);
|
|
|
|
/*
|
|
* If GIT_DIR is set explicitly, we're not going
|
|
* to do any discovery, but we still do repository
|
|
* validation.
|
|
*/
|
|
gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
|
|
if (gitdirenv)
|
|
return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok);
|
|
|
|
if (env_ceiling_dirs) {
|
|
string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1);
|
|
filter_string_list(&ceiling_dirs, 0,
|
|
canonicalize_ceiling_entry, NULL);
|
|
ceil_offset = longest_ancestor_length(cwd, &ceiling_dirs);
|
|
string_list_clear(&ceiling_dirs, 0);
|
|
}
|
|
|
|
if (ceil_offset < 0 && has_dos_drive_prefix(cwd))
|
|
ceil_offset = 1;
|
|
|
|
/*
|
|
* Test in the following order (relative to the cwd):
|
|
* - .git (file containing "gitdir: <path>")
|
|
* - .git/
|
|
* - ./ (bare)
|
|
* - ../.git
|
|
* - ../.git/
|
|
* - ../ (bare)
|
|
* - ../../.git/
|
|
* etc.
|
|
*/
|
|
one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
|
|
if (one_filesystem)
|
|
current_device = get_device_or_die(".", NULL, 0);
|
|
for (;;) {
|
|
gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
|
|
if (gitfile)
|
|
gitdirenv = gitfile = xstrdup(gitfile);
|
|
else {
|
|
if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT))
|
|
gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
|
|
}
|
|
|
|
if (gitdirenv) {
|
|
ret = setup_discovered_git_dir(gitdirenv,
|
|
cwd, offset, len,
|
|
nongit_ok);
|
|
free(gitfile);
|
|
return ret;
|
|
}
|
|
free(gitfile);
|
|
|
|
if (is_git_directory("."))
|
|
return setup_bare_git_dir(cwd, offset, len, nongit_ok);
|
|
|
|
offset_parent = offset;
|
|
while (--offset_parent > ceil_offset && cwd[offset_parent] != '/');
|
|
if (offset_parent <= ceil_offset)
|
|
return setup_nongit(cwd, nongit_ok);
|
|
if (one_filesystem) {
|
|
dev_t parent_device = get_device_or_die("..", cwd, offset);
|
|
if (parent_device != current_device) {
|
|
if (nongit_ok) {
|
|
if (chdir(cwd))
|
|
die_errno("Cannot come back to cwd");
|
|
*nongit_ok = 1;
|
|
return NULL;
|
|
}
|
|
cwd[offset] = '\0';
|
|
die("Not a git repository (or any parent up to mount point %s)\n"
|
|
"Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd);
|
|
}
|
|
}
|
|
if (chdir("..")) {
|
|
cwd[offset] = '\0';
|
|
die_errno("Cannot change to '%s/..'", cwd);
|
|
}
|
|
offset = offset_parent;
|
|
}
|
|
}
|
|
|
|
const char *setup_git_directory_gently(int *nongit_ok)
|
|
{
|
|
const char *prefix;
|
|
|
|
prefix = setup_git_directory_gently_1(nongit_ok);
|
|
if (prefix)
|
|
setenv("GIT_PREFIX", prefix, 1);
|
|
else
|
|
setenv("GIT_PREFIX", "", 1);
|
|
|
|
if (startup_info) {
|
|
startup_info->have_repository = !nongit_ok || !*nongit_ok;
|
|
startup_info->prefix = prefix;
|
|
}
|
|
return prefix;
|
|
}
|
|
|
|
int git_config_perm(const char *var, const char *value)
|
|
{
|
|
int i;
|
|
char *endptr;
|
|
|
|
if (value == NULL)
|
|
return PERM_GROUP;
|
|
|
|
if (!strcmp(value, "umask"))
|
|
return PERM_UMASK;
|
|
if (!strcmp(value, "group"))
|
|
return PERM_GROUP;
|
|
if (!strcmp(value, "all") ||
|
|
!strcmp(value, "world") ||
|
|
!strcmp(value, "everybody"))
|
|
return PERM_EVERYBODY;
|
|
|
|
/* Parse octal numbers */
|
|
i = strtol(value, &endptr, 8);
|
|
|
|
/* If not an octal number, maybe true/false? */
|
|
if (*endptr != 0)
|
|
return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK;
|
|
|
|
/*
|
|
* Treat values 0, 1 and 2 as compatibility cases, otherwise it is
|
|
* a chmod value to restrict to.
|
|
*/
|
|
switch (i) {
|
|
case PERM_UMASK: /* 0 */
|
|
return PERM_UMASK;
|
|
case OLD_PERM_GROUP: /* 1 */
|
|
return PERM_GROUP;
|
|
case OLD_PERM_EVERYBODY: /* 2 */
|
|
return PERM_EVERYBODY;
|
|
}
|
|
|
|
/* A filemode value was given: 0xxx */
|
|
|
|
if ((i & 0600) != 0600)
|
|
die("Problem with core.sharedRepository filemode value "
|
|
"(0%.3o).\nThe owner of files must always have "
|
|
"read and write permissions.", i);
|
|
|
|
/*
|
|
* Mask filemode value. Others can not get write permission.
|
|
* x flags for directories are handled separately.
|
|
*/
|
|
return -(i & 0666);
|
|
}
|
|
|
|
int check_repository_format_version(const char *var, const char *value, void *cb)
|
|
{
|
|
if (strcmp(var, "core.repositoryformatversion") == 0)
|
|
repository_format_version = git_config_int(var, value);
|
|
else if (strcmp(var, "core.sharedrepository") == 0)
|
|
shared_repository = git_config_perm(var, value);
|
|
else if (strcmp(var, "core.bare") == 0) {
|
|
is_bare_repository_cfg = git_config_bool(var, value);
|
|
if (is_bare_repository_cfg == 1)
|
|
inside_work_tree = -1;
|
|
} else if (strcmp(var, "core.worktree") == 0) {
|
|
if (!value)
|
|
return config_error_nonbool(var);
|
|
free(git_work_tree_cfg);
|
|
git_work_tree_cfg = xstrdup(value);
|
|
inside_work_tree = -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int check_repository_format(void)
|
|
{
|
|
return check_repository_format_gently(get_git_dir(), NULL);
|
|
}
|
|
|
|
/*
|
|
* Returns the "prefix", a path to the current working directory
|
|
* relative to the work tree root, or NULL, if the current working
|
|
* directory is not a strict subdirectory of the work tree root. The
|
|
* prefix always ends with a '/' character.
|
|
*/
|
|
const char *setup_git_directory(void)
|
|
{
|
|
return setup_git_directory_gently(NULL);
|
|
}
|
|
|
|
const char *resolve_gitdir(const char *suspect)
|
|
{
|
|
if (is_git_directory(suspect))
|
|
return suspect;
|
|
return read_gitfile(suspect);
|
|
}
|