Merge pull request #205 from rhatdan/subuid

Add more information in errors about missing uidimappings or gidmappings

pkg/idtools/idtools.go

@@ -140,10 +140,10 @@ func NewIDMappings(username, groupname string) (*IDMappings, error) {
 		return nil, err
 	}
 	if len(subuidRanges) == 0 {
-		return nil, fmt.Errorf("No subuid ranges found for user %q", username)
+		return nil, fmt.Errorf("No subuid ranges found for user %q in %s", username, subuidFileName)
 	}
 	if len(subgidRanges) == 0 {
-		return nil, fmt.Errorf("No subgid ranges found for group %q", groupname)
+		return nil, fmt.Errorf("No subgid ranges found for group %q in %s", groupname, subgidFileName)
 	}
 
 	return &IDMappings{