add ci.nix

ci.nix

@@ -0,0 +1,26 @@
+let
+  pkgs = import <nixpkgs> {};
+
+  hello_worlds = import examples/hello_world.nix;
+  simples = import examples/simple.nix;
+
+  writeTest = expectedValue: test: pkgs.writeScript "test" ''
+    #!/bin/sh
+    if test "$(${test})" != "${expectedValue}"; then
+      echo 'test ${test} failed'
+      exit 1
+    fi
+  '';
+
+in
+  pkgs.lib.mapAttrs' (n: v: pkgs.lib.nameValuePair "hello_${n}" (writeTest "hello world" v)) hello_worlds //
+  pkgs.lib.mapAttrs' (n: v: pkgs.lib.nameValuePair "simple_${n}" v) {
+    bash = writeTest "bash features" simples.bash;
+    dash = writeTest "dash features" simples.dash;
+    haskell = writeTest "Rolf" simples.haskell;
+    perl = writeTest "Howdy!" simples.perl;
+    python2 = writeTest "['some', 'random', 'variables']" simples.python2;
+    python3 = writeTest "['some', 'random', 'variables']" simples.python3;
+    sed = writeTest "hello world" simples.sed;
+  }
+