nix-instantiate: Fix read-only evaluation

2012-11-26 17:41:10 +01:00
parent 8d8d47abd2
commit 408a7bfac1
5 changed files with 17 additions and 10 deletions
@@ -28,6 +28,17 @@ string DrvInfo::queryOutPath(EvalState & state) const
 }


+string DrvInfo::queryOutputName(EvalState & state) const
+{
+    if (outputName == "" && attrs) {
+        Bindings::iterator i = attrs->find(state.sOutputName);
+        PathSet context;
+        (string &) outputName = i != attrs->end() ? state.coerceToString(*i->value, context) : "";
+    }
+    return outputName;
+}
+
+
 MetaInfo DrvInfo::queryMetaInfo(EvalState & state) const
 {
    if (metaInfoRead) return meta;