centralized ensure dir

package.cm

@@ -6,16 +6,6 @@ var link = use('link')
 
 var global_shop_path = runtime.shop_path
 
-// Convert package name to a safe directory name
-// For absolute paths (local packages), replace / with _ 
-// For remote packages, keep slashes as they use nested directories
-function safe_package_path(pkg) {
-  if (!pkg) return pkg
-  if (starts_with(pkg, '/'))
-    return replace(replace(pkg, '/', '_'), '@', '_')
-  return replace(pkg, '@', '_')
-}
-
 function get_path(name)
 {
   // If name is null, return the current project directory
@@ -33,11 +23,11 @@ function get_path(name)
     if (starts_with(link_target, '/'))
       return link_target
     // Otherwise it's another package name, resolve that
-    return global_shop_path + '/packages/' + replace(replace(link_target, '/', '_'), '@', '_')
+    return global_shop_path + '/packages/' + fd.safe_package_path(link_target)
   }
 
   // Remote packages use nested directories, so don't transform slashes
-  return global_shop_path + '/packages/' + replace(name, '@', '_')
+  return global_shop_path + '/packages/' + fd.safe_package_path(name)
 }
 
 var config_cache = {}