From 46f5689c73b2b00a91ac26aed92a4ec9057ff3d2 Mon Sep 17 00:00:00 2001
From: Tom McLaughlin <tom@codedown.io>
Date: Tue, 9 Apr 2024 14:29:58 -0700
Subject: [PATCH] cling: add a smoke test

---
 .../interpreters/cling/default.nix            | 40 ++++++++++++++++---
 1 file changed, 35 insertions(+), 5 deletions(-)

diff --git a/pkgs/development/interpreters/cling/default.nix b/pkgs/development/interpreters/cling/default.nix
index a5a3de81bd5a..2f3327b0554a 100644
--- a/pkgs/development/interpreters/cling/default.nix
+++ b/pkgs/development/interpreters/cling/default.nix
@@ -155,11 +155,41 @@ let
 
 in
 
-runCommand "cling-${unwrapped.version}" {
+stdenv.mkDerivation {
+  pname = "cling";
+  version = unwrapped.version;
+
   nativeBuildInputs = [ makeWrapper ];
   inherit unwrapped flags;
   inherit (unwrapped) meta;
-} ''
-  makeWrapper $unwrapped/bin/cling $out/bin/cling \
-    --add-flags "$flags"
-''
+
+  dontUnpack = true;
+  dontConfigure = true;
+
+  buildPhase = ''
+    runHook preBuild
+
+    makeWrapper $unwrapped/bin/cling $out/bin/cling \
+      --add-flags "$flags"
+
+    runHook postBuild
+  '';
+
+  doCheck = true;
+  checkPhase = ''
+    runHook preCheck
+
+    output=$($out/bin/cling <<EOF
+    #include <iostream>
+    std::cout << "hello world" << std::endl
+    EOF
+    )
+
+    echo "$output" | grep -q "Type C++ code and press enter to run it"
+    echo "$output" | grep -q "hello world"
+
+    runHook postCheck
+  '';
+
+  dontInstall = true;
+}