Add a trivial test suite

.github/workflows/validate.yml

@@ -0,0 +1,28 @@
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  lints:
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+      contents: read
+    steps:
+      - name: git checkout
+        uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@main
+        with:
+          determinate: true
+      - uses: DeterminateSystems/magic-nix-cache-action@main
+      - run: nix run nixpkgs#action-validator -- -v ./.github/workflows/workflow.yml
+      - run: nix run nixpkgs#nodePackages.prettier -- --check .
+
+  DeterminateCI:
+    uses: DeterminateSystems/ci/.github/workflows/workflow.yml@main
+    permissions:
+      id-token: "write"
+      contents: "read"
+    with:
+      directory: ./tests/smoke

README.md

@@ -117,6 +117,8 @@ jobs:
 
 ## Notes
 
+Contributors: please format all files with `nix run nixpkgs#nodePackages.prettier -- --write .` before committing.
+
 Use of this workflow uses a collection of GitHub Action by Determinate Systems, which are covered by the Determinate Systems [privacy policy][privacy policy] and [terms of service][tos].
 
 [flake-schemas]: https://determinate.systems/posts/flake-schemas/

tests/smoke/flake.lock

@@ -0,0 +1,25 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1729880355,
+        "narHash": "sha256-RP+OQ6koQQLX5nw0NmcDrzvGL8HDLnyXt/jHhL1jwjM=",
+        "rev": "18536bf04cd71abd345f9579158841376fdd0c5a",
+        "revCount": 696981,
+        "type": "tarball",
+        "url": "https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.1.696981%2Brev-18536bf04cd71abd345f9579158841376fdd0c5a/0192cc00-028d-731c-91e9-e50f0dd89c03/source.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://flakehub.com/f/NixOS/nixpkgs/0.1.tar.gz"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

tests/smoke/flake.nix

@@ -0,0 +1,16 @@
+{
+  inputs = {
+    nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1.tar.gz";
+  };
+
+  outputs = { self, nixpkgs }: {
+    devShells.x86_64-linux.default = with nixpkgs.legacyPackages.x86_64-linux; mkShell {
+        name = "devshell";
+        buildInputs = [
+            hello
+        ];
+    };
+
+    packages.aarch64-darwin.default = nixpkgs.legacyPackages.aarch64-darwin.hello;
+  };
+}