pkgs/test/release/default.nix: init

This derivation verifies that all jobset attributes can be evaluated
under tryEval without producing any non-catchable errors or causing
infinite recursion.

pkgs/test/release/default.nix

@@ -0,0 +1,46 @@
+# Adapted from lib/tests/release.nix
+{ pkgs-path ? ../../..
+, pkgs ? import pkgs-path {}
+, lib ? pkgs.lib
+, nix ? pkgs.nix
+}:
+
+#
+# This verifies that release-attrpaths-superset.nix does not encounter
+# infinite recursion or non-tryEval-able failures.
+#
+pkgs.runCommand "all-attrs-eval-under-tryEval" {
+  nativeBuildInputs = [
+    nix
+    pkgs.gitMinimal
+  ] ++ lib.optional pkgs.stdenv.isLinux pkgs.inotify-tools;
+  strictDeps = true;
+}
+''
+  datadir="${nix}/share"
+  export TEST_ROOT=$(pwd)/test-tmp
+  export HOME=$(mktemp -d)
+  export NIX_BUILD_HOOK=
+  export NIX_CONF_DIR=$TEST_ROOT/etc
+  export NIX_LOCALSTATE_DIR=$TEST_ROOT/var
+  export NIX_LOG_DIR=$TEST_ROOT/var/log/nix
+  export NIX_STATE_DIR=$TEST_ROOT/var/nix
+  export NIX_STORE_DIR=$TEST_ROOT/store
+  export PAGER=cat
+  cacheDir=$TEST_ROOT/binary-cache
+
+  nix-store --init
+
+  cp -r ${pkgs-path + "/lib"} lib
+  cp -r ${pkgs-path + "/pkgs"} pkgs
+  cp -r ${pkgs-path + "/default.nix"} default.nix
+  cp -r ${pkgs-path + "/nixos"} nixos
+  cp -r ${pkgs-path + "/maintainers"} maintainers
+  cp -r ${pkgs-path + "/.version"} .version
+  cp -r ${pkgs-path + "/doc"} doc
+  echo "Running pkgs/top-level/release-attrpaths-superset.nix"
+  nix-instantiate --eval --strict --json pkgs/top-level/release-attrpaths-superset.nix -A names > /dev/null
+
+  mkdir $out
+  echo success > $out/${nix.version}
+''