From cf705eaf78df646116f2fc14e6fa07d88f1607fe Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <e.dolstra@tudelft.nl>
Date: Tue, 17 Oct 2006 10:58:12 +0000
Subject: [PATCH] * toString: don't copy paths.  So toString can be used to
 pass   non-store paths to a builder.

---
 src/libexpr/primops.cc | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc
index 2fbfa538f..536345f22 100644
--- a/src/libexpr/primops.cc
+++ b/src/libexpr/primops.cc
@@ -324,12 +324,13 @@ static Expr primDirOf(EvalState & state, const ATermVector & args)
 }
 
 
-/* Convert the argument to a string. */
+/* Convert the argument to a string.  Paths are *not* copied to the
+   store, so `toString /foo/bar' yields `"/foo/bar"', not
+   `"/nix/store/whatever..."'. */
 static Expr primToString(EvalState & state, const ATermVector & args)
 {
     PathSet context;
-    string s = coerceToString(state, args[0], context);
-    /* !!! do lists etc */
+    string s = coerceToString(state, args[0], context, true, false);
     return makeStr(s, context);
 }