[PATCH 1/1] bugfix for git-checkout-cache --prefix=/symlink/export_dir/ -a

[David Greaves <david@dgreaves.com>]

If there's a prefix then allow symlinks to directories in it.
This fixes a bug where
  git-checkout-cache --prefix=/symlink/export_dir/ -a
otherwise fails.

Signed-off-by: David Greaves <david@dgreaves.com>

---
commit 18006ac69ae9db97b7d96fd0bfb1bdb6893e318d
tree 37580a3d32262d2cee7d28b20474c0f2ceb6faaa
parent 2aef5bbae99aeba3551408eae13faea02bf55b67
author David Greaves <david@dgreaves.com> Mon, 23 May 2005 09:42:04 +0100
committer David Greaves <david@dgreaves.com> Mon, 23 May 2005 09:42:04 +0100

 checkout-cache.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

Index: checkout-cache.c
===================================================================
--- 99282828d5af15b0af0d0eac13a5b1194e88342c/checkout-cache.c  (mode:100644)
+++ 37580a3d32262d2cee7d28b20474c0f2ceb6faaa/checkout-cache.c  (mode:100644)
@@ -37,20 +37,25 @@
 #include "cache.h"
 
 static int force = 0, quiet = 0, not_new = 0, refresh_cache = 0;
+const char *base_dir = "";
 
 static void create_directories(const char *path)
 {
 	int len = strlen(path);
 	char *buf = xmalloc(len + 1);
 	const char *slash = path;
+	int baselen = strlen(base_dir);
 
 	while ((slash = strchr(slash+1, '/')) != NULL) {
+		struct stat st;
 		len = slash - path;
 		memcpy(buf, path, len);
 		buf[len] = 0;
+		if (slash - path <= baselen &&
+		    !stat(buf, &st) && S_ISDIR(st.st_mode))
+			continue; /* allow symlinks only in --prefix */
 		if (mkdir(buf, 0755)) {
 			if (errno == EEXIST) {
-				struct stat st;
 				if (!lstat(buf, &st) && S_ISDIR(st.st_mode))
 					continue; /* ok */
 				if (force && !unlink(buf) && !mkdir(buf, 0755))
@@ -229,7 +234,6 @@
 int main(int argc, char **argv)
 {
 	int i, force_filename = 0;
-	const char *base_dir = "";
 	struct cache_file cache_file;
 	int newfd = -1;