Avoid deleting cache when killing a long cdg

zsh/gclone.zsh

@@ -102,9 +102,11 @@ if [ -d "$GCLONE_PATH" ]; then
     compdef _cdg cdg
 
     _cdg_refresh_cache() {
+        tmpfile=`mktemp`
         find $GCLONE_PATH -maxdepth 3 \
             -not -name ".cdgcache" \
-            -not -name "git" | sort > $GCLONE_PATH/.cdgcache
+            -not -name "git" | sort > $tmpfile
+        mv $tmpfile $GCLONE_PATH/.cdgcache
     }
 
     _cdg_existing_dirs() {