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-rw-r--r--tvix/eval/default.nix121
-rw-r--r--tvix/eval/src/tests/nix_tests/eval-okay-autoargs.flags2
2 files changed, 121 insertions, 2 deletions
diff --git a/tvix/eval/default.nix b/tvix/eval/default.nix
index ad4a27978c24..09f712d07861 100644
--- a/tvix/eval/default.nix
+++ b/tvix/eval/default.nix
@@ -1,6 +1,125 @@
-{ depot, ... }:
+{ depot, pkgs, lib, ... }:
 
+lib.fix (self:
 depot.third_party.naersk.buildPackage {
   src = ./.;
   doCheck = true;
+
+  meta.ci.targets = builtins.attrNames self.passthru;
+
+  passthru.cpp-nix-run-lang-tests = pkgs.stdenv.mkDerivation {
+    name = "cpp-nix-run-lang-tests";
+
+    src = ./src/tests;
+    dontConfigure = true;
+
+    nativeBuildInputs = [
+      pkgs.buildPackages.nix
+    ];
+
+    buildPhase = ''
+      chmod +x $scriptPath
+      patchShebangs --build $scriptPath
+
+      mkdir store var
+      export NIX_STORE_DIR="$(realpath store)"
+      export NIX_STATE_DIR="$(realpath var)"
+
+      $scriptPath
+    '';
+
+    installPhase = "touch $out";
+
+    passAsFile = [ "script" ];
+    script = ''
+      #!/usr/bin/env bash
+      # SPDX-License-Identifier: LGPL-2.1-only
+      # SPDX-FileCopyrightText: © 2022 The TVL Contributors
+      # SPDX-FileCopyrightText: © 2004-2022 The Nix Contributors
+      #
+      # Execute language tests found in tvix_tests and nix_tests
+      # using the C++ Nix implementation. Based on NixOS/nix:tests/lang.sh.
+
+      expect() {
+        local expected res
+        expected="$1"
+        shift
+        set +e
+        "$@"
+        res="$?"
+        set -e
+        [[ $res -eq $expected ]]
+      }
+
+      TESTDIR="''${1:-.}"
+
+      fail=0
+
+      for i in "$TESTDIR/"*_tests/parse-fail-*.nix; do
+          echo "parsing $i (should fail)";
+          if ! expect 1 nix-instantiate --parse - < $i 2> /dev/null; then
+              echo "FAIL: $i shouldn't parse"
+              fail=1
+          fi
+      done
+
+      for i in "$TESTDIR/"*_tests/parse-okay-*.nix; do
+          echo "parsing $i (should succeed)";
+          if ! expect 0 nix-instantiate --parse - < $i > /dev/null; then
+              echo "FAIL: $i should parse"
+              fail=1
+          fi
+      done
+
+      for i in "$TESTDIR/"*_tests/eval-fail-*.nix; do
+          echo "evaluating $i (should fail)";
+          if ! expect 1 nix-instantiate --eval $i 2> /dev/null; then
+              echo "FAIL: $i shouldn't evaluate"
+              fail=1
+          fi
+      done
+
+      export TEST_VAR="foo"
+
+      for i in "$TESTDIR/"*_tests/eval-okay-*.nix; do
+          echo "evaluating $i (should succeed)";
+
+          base="$(dirname "$i")/$(basename "$i" ".nix")"
+
+          if [[ "$(basename "$i")" == "eval-okay-search-path.nix" ]]; then
+            # TODO(sterni): fix this test
+            echo "SKIPPED: $i"
+            continue
+          fi
+
+          if test -e $base.exp; then
+              flags=
+              if test -e $base.flags; then
+                  flags=$(cat $base.flags)
+              fi
+              if ! expect 0 nix-instantiate $flags --eval --strict $base.nix > $base.out; then
+                  echo "FAIL: $i should evaluate"
+                  fail=1
+              elif ! diff $base.out $base.exp; then
+                  echo "FAIL: evaluation result of $i not as expected"
+                  fail=1
+              fi
+          fi
+
+          if test -e $base.exp.xml; then
+              if ! expect 0 nix-instantiate --eval --xml --no-location --strict \
+                      $base.nix > $base.out.xml; then
+                  echo "FAIL: $i should evaluate"
+                  fail=1
+              elif ! cmp -s $base.out.xml $base.exp.xml; then
+                  echo "FAIL: XML evaluation result of $i not as expected"
+                  fail=1
+              fi
+          fi
+      done
+
+      exit $fail
+    '';
+  };
 }
+)
diff --git a/tvix/eval/src/tests/nix_tests/eval-okay-autoargs.flags b/tvix/eval/src/tests/nix_tests/eval-okay-autoargs.flags
index ae3762254460..217c7a5ae291 100644
--- a/tvix/eval/src/tests/nix_tests/eval-okay-autoargs.flags
+++ b/tvix/eval/src/tests/nix_tests/eval-okay-autoargs.flags
@@ -1 +1 @@
---arg lib import(lang/lib.nix) --argstr xyzzy xyzzy! -A result
+--arg lib import(nix_tests/lib.nix) --argstr xyzzy xyzzy! -A result