path: move `validate_headref()` to its only user

While `validate_headref()` is only called from `is_git_directory()` in
"setup.c", it is currently implemented in "path.c". Move it over such
that it becomes clear that it is only really used during setup in order
to discover repositories.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 0 insertions, 53 deletions

diff --git a/path.c b/path.c
index cc02165530..bd6e25245d 100644
--- a/path.c
+++ b/path.c
@@ -5,7 +5,6 @@
 #include "abspath.h"
 #include "environment.h"
 #include "gettext.h"
-#include "hex.h"
 #include "repository.h"
 #include "strbuf.h"
 #include "string-list.h"
@@ -647,58 +646,6 @@ void strbuf_git_common_path(struct strbuf *sb,
 	va_end(args);
 }
 
-int validate_headref(const char *path)
-{
-	struct stat st;
-	char buffer[256];
-	const char *refname;
-	struct object_id oid;
-	int fd;
-	ssize_t len;
-
-	if (lstat(path, &st) < 0)
-		return -1;
-
-	/* Make sure it is a "refs/.." symlink */
-	if (S_ISLNK(st.st_mode)) {
-		len = readlink(path, buffer, sizeof(buffer)-1);
-		if (len >= 5 && !memcmp("refs/", buffer, 5))
-			return 0;
-		return -1;
-	}
-
-	/*
-	 * Anything else, just open it and try to see if it is a symbolic ref.
-	 */
-	fd = open(path, O_RDONLY);
-	if (fd < 0)
-		return -1;
-	len = read_in_full(fd, buffer, sizeof(buffer)-1);
-	close(fd);
-
-	if (len < 0)
-		return -1;
-	buffer[len] = '\0';
-
-	/*
-	 * Is it a symbolic ref?
-	 */
-	if (skip_prefix(buffer, "ref:", &refname)) {
-		while (isspace(*refname))
-			refname++;
-		if (starts_with(refname, "refs/"))
-			return 0;
-	}
-
-	/*
-	 * Is this a detached HEAD?
-	 */
-	if (get_oid_hex_any(buffer, &oid) != GIT_HASH_UNKNOWN)
-		return 0;
-
-	return -1;
-}
-
 static struct passwd *getpw_str(const char *username, size_t len)
 {
 	struct passwd *pw;