* Test case to show that parallel builds of different fixed-output

  derivations that produce the same output path don't work properly
  wrt locking.  This happens a lot in the build farm when fetchurl
  derivations downloading the same file on different platforms are
  executed in parallel and then copied back to the main machine.

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/fixed.sh b/tests/fixed.sh
index fc37e40f4210..d0a284af48c4 100644
--- a/tests/fixed.sh
+++ b/tests/fixed.sh
@@ -1,18 +1,33 @@
 source common.sh
 
+clearStore
+
+echo 'testing good...'
 drvs=$($nixinstantiate fixed.nix -A good)
 echo $drvs
 $nixstore -r $drvs
 
+echo 'testing good2...'
 drvs=$($nixinstantiate fixed.nix -A good2)
 echo $drvs
 $nixstore -r $drvs
 
+echo 'testing bad...'
 drvs=$($nixinstantiate fixed.nix -A bad)
 echo $drvs
 if $nixstore -r $drvs; then false; fi
 
+echo 'testing reallyBad...'
 if $nixinstantiate fixed.nix -A reallyBad; then false; fi
 
 # While we're at it, check attribute selection a bit more.
+echo 'testing attribute selection...'
 test $($nixinstantiate fixed.nix -A good.1 | wc -l) = 1
+
+# Test parallel builds of derivations that produce the same output.
+# Only one should run at the same time.
+echo 'testing parallelSame...'
+clearStore
+drvs=$($nixinstantiate fixed.nix -A parallelSame)
+echo $drvs
+$nixstore -r $drvs -j2