WIP: Testing with automatic fetching

garlic/pp/check.nix

@@ -0,0 +1,33 @@
+{
+  stdenv
+}:
+
+resultTree:
+
+stdenv.mkDerivation {
+  name = "check";
+  preferLocalBuild = true;
+  phases = [ "installPhase" ];
+  installPhase = ''
+    echo "checking result tree: ${resultTree}"
+    cd ${resultTree}
+    for exp in *-experiment; do
+      cd ${resultTree}/$exp
+      echo "$exp: checking units"
+      for unit in *-unit; do
+        cd ${resultTree}/$exp/$unit
+        if [ ! -e status ]; then
+          echo "missing $unit/status file, aborting"
+          exit 1
+        fi
+        st=$(cat status)
+        if [ "$st" != "completed" ]; then
+          echo "unit $unit is not complete yet, aborting"
+          exit 1
+        fi
+      done
+      echo "$exp: execution complete"
+    done
+    ln -s $out ${resultTree}
+  '';
+}