Merge pull request #94 from input-output-hk/nm/flake

Switch from nickel to haskell.nix

Author: neilmayhew

.envrc

@@ -1,2 +1,4 @@
-watch_file project.ncl
-use flake
+# shellcheck shell=bash
+if has nix; then
+  use flake
+fi

.github/workflows/nix-build.yml

@@ -0,0 +1,39 @@
+name: Nix Build
+
+on:
+  pull_request:
+  push:
+    branches: ["master"]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Install nix
+      uses: cachix/install-nix-action@v31
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+
+    - name: Build
+      id: build
+      run: |
+        nix build --accept-flake-config .#static
+        echo "name=$(nix derivation show ./result | jq -r .[].env.name)" >>"$GITHUB_OUTPUT"
+        echo "artifacts=$(find -L result -type f)" >>"$GITHUB_OUTPUT"
+
+    - name: Record system details
+      id: system-details
+      run: |
+        echo "system=$(uname -s)" >>"$GITHUB_OUTPUT"
+        echo "machine=$(uname -m)" >>"$GITHUB_OUTPUT"
+
+    - name: Upload artifacts
+      uses: actions/upload-artifact@v4
+      with:
+        name: ${{ steps.build.outputs.name }}-${{ steps.system-details.outputs.system }}-${{ steps.system-details.outputs.machine }}
+        path: ${{ steps.build.outputs.artifacts }}

.gitignore

@@ -2,4 +2,7 @@
 
 .devenv
 dist-newstyle
-.vscode
+.vscode
+
+/.pre-commit-config.yaml
+/result

cuddle.cabal

@@ -21,7 +21,7 @@ copyright: 2025 Input Output Global Inc (IOG)
 category: Codec
 build-type: Simple
 extra-doc-files: CHANGELOG.md
-tested-with: ghc =={9.6, 9.8, 9.10, 9.12}
+tested-with: ghc ==9.6 || ==9.8 || ==9.10 || ==9.12
 
 source-repository head
   type: git
@@ -38,8 +38,7 @@ flag example
   default: False
 
 common warnings
-  ghc-options:
-    -Wall
+  ghc-options: -Wall
 
 library
   import: warnings