From 1f7901ec3b66fa80203bbac2cd6852eda389ba18 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Tue, 11 Sep 2012 19:10:11 -0400
Subject: [PATCH] Test hash rewriting

---
 tests/multiple-outputs.sh | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/tests/multiple-outputs.sh b/tests/multiple-outputs.sh
index 20f3380a1..07276bb66 100644
--- a/tests/multiple-outputs.sh
+++ b/tests/multiple-outputs.sh
@@ -15,7 +15,7 @@ grep -q 'multiple-outputs-a.drv",\["first","second"\]' $drvPath
 grep -q 'multiple-outputs-b.drv",\["out"\]' $drvPath
 
 # While we're at it, test the ‘unsafeDiscardOutputDependency’ primop.
-outPath=$(nix-build multiple-outputs.nix -A d)
+outPath=$(nix-build multiple-outputs.nix -A d --no-out-link)
 drvPath=$(cat $outPath/drv)
 outPath=$(nix-store -q $drvPath)
 ! [ -e "$outPath" ]
@@ -23,17 +23,33 @@ outPath=$(nix-store -q $drvPath)
 # Do a build of something that depends on a derivation with multiple
 # outputs.
 echo "building b..."
-outPath=$(nix-build multiple-outputs.nix -A b)
+outPath=$(nix-build multiple-outputs.nix -A b --no-out-link)
 echo "output path is $outPath"
 [ "$(cat "$outPath"/file)" = "success" ]
 
+# Test nix-build on a derivation with multiple outputs.
+nix-build multiple-outputs.nix -A a -o $TEST_ROOT/result
+[ "$(cat $TEST_ROOT/result-first/file)" = "first" ]
+[ "$(cat $TEST_ROOT/result-second/file)" = "second" ]
+[ "$(cat $TEST_ROOT/result-second/link/file)" = "first" ]
+hash1=$(nix-store -q --hash $TEST_ROOT/result-second)
+
+# Delete one of the outputs and rebuild it.  This will cause a hash
+# rewrite.
+nix-store --delete $TEST_ROOT/result-second --ignore-liveness
+nix-build multiple-outputs.nix -A a -o $TEST_ROOT/result
+[ "$(cat $TEST_ROOT/result-second/file)" = "second" ]
+[ "$(cat $TEST_ROOT/result-second/link/file)" = "first" ]
+hash2=$(nix-store -q --hash $TEST_ROOT/result-second)
+[ "$hash1" = "$hash2" ]
+
 # Make sure that nix-build works on derivations with multiple outputs.
 echo "building a.first..."
-nix-build multiple-outputs.nix -A a.first
+nix-build multiple-outputs.nix -A a.first --no-out-link
 
 # Cyclic outputs should be rejected.
 echo "building cyclic..."
-if nix-build multiple-outputs.nix -A cyclic; then
+if nix-build multiple-outputs.nix -A cyclic --no-out-link; then
     echo "Cyclic outputs incorrectly accepted!"
     exit 1
 fi