1 files changed, 41 insertions, 0 deletions
diff --git a/pkgs/build-support/trivial-builders/test.sh b/pkgs/build-support/trivial-builders/test.sh
new file mode 100755
index 00000000000..eec501ae601
--- /dev/null
+++ b/pkgs/build-support/trivial-builders/test.sh
@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+
+# -------------------------------------------------------------------------- #
+#
+#                         trivial-builders test
+#
+# -------------------------------------------------------------------------- #
+#
+#  This file can be run independently (quick):
+#
+#      $ pkgs/build-support/trivial-builders/test.sh
+#
+#  or in the build sandbox with a ~20s VM overhead
+#
+#      $ nix-build -A tests.trivial-builders
+#
+# -------------------------------------------------------------------------- #
+
+# strict bash
+set -euo pipefail
+
+# debug
+# set -x
+# PS4='+(${BASH_SOURCE}:${LINENO}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'
+
+cd "$(dirname ${BASH_SOURCE[0]})"  # nixpkgs root
+
+testDirectReferences() {
+  expr="$1"
+  diff -U3 \
+    <(sort <$(nix-build --no-out-link --expr "with import ../../.. {}; writeDirectReferencesToFile ($expr)")) \
+    <(nix-store -q --references $(nix-build --no-out-link --expr "with import ../../.. {}; ($expr)") | sort)
+}
+
+testDirectReferences 'hello'
+testDirectReferences 'figlet'
+testDirectReferences 'writeText "hi" "hello"'
+testDirectReferences 'writeText "hi" "hello ${hello}"'
+testDirectReferences 'writeText "hi" "hello ${hello} ${figlet}"'
+
+echo 'OK!'