From 37380c84b9a4ddb8dc59beab1f961a54eb31b643 Mon Sep 17 00:00:00 2001
From: Matthias Beyer <mail@beyermatthias.de>
Date: Sat, 2 Jul 2016 17:54:35 +0200
Subject: [PATCH] Add StoreId::unstorified()

---
 libimagstore/src/storeid.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libimagstore/src/storeid.rs b/libimagstore/src/storeid.rs
index 48f8b834..93c19dd7 100644
--- a/libimagstore/src/storeid.rs
+++ b/libimagstore/src/storeid.rs
@@ -9,6 +9,7 @@ use std::fmt::Error as FmtError;
 use std::result::Result as RResult;
 
 use error::StoreErrorKind as SEK;
+use error::MapErrInto;
 use store::Result;
 use store::Store;
 
@@ -26,6 +27,13 @@ impl StoreId {
         StoreId::from(new_id)
     }
 
+    pub fn unstorified(self, store: &Store) -> Result<StoreId> {
+        self.strip_prefix(store.path())
+            .map(PathBuf::from)
+            .map(StoreId::from)
+            .map_err_into(SEK::StoreIdHandlingError)
+    }
+
 }
 
 impl Into<PathBuf> for StoreId {