chore: nix flake for notty (#6)

Signed-off-by: Ali Caglayan <[email protected]>

.github/workflows/build.yml

@@ -0,0 +1,17 @@
+name: "Build"
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: cachix/install-nix-action@v18
+    - name: "Run nix flake check"
+      run: nix flake check
+    - name: "Run nix build"
+      run: nix build
+

flake.nix

@@ -0,0 +1,31 @@
+{
+  description = "Notty Nix Flake";
+
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+  inputs.nixpkgs.url = "github:nixos/nixpkgs";
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages."${system}";
+        inherit (pkgs.ocamlPackages) buildDunePackage;
+      in
+      rec {
+        packages = rec {
+          default = notty;
+          notty = buildDunePackage {
+            pname = "notty";
+            version = "n/a";
+            src = ./.;
+            duneVersion = "3";
+            nativeBuildInputs = with pkgs.ocamlPackages; [ cppo ];
+            propagatedBuildInputs = with pkgs.ocamlPackages; [ uutf ];
+            doCheck = true;
+          };
+        };
+        devShells.default = pkgs.mkShell {
+          inputsFrom = pkgs.lib.attrValues packages;
+          buildInputs = with pkgs.ocamlPackages; [ ocaml-lsp ];
+        };
+      });
+}