Add CI workflow

.github/workflows/ci.yml

@@ -0,0 +1,46 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    env:
+      AF_VERSION: "3.10.0"
+      AF_INSTALLER: "ArrayFire-v3.10.0_Linux_x86_64.sh"
+      AF_URL: "https://arrayfire.s3.amazonaws.com/3.10.0/ArrayFire-v3.10.0_Linux_x86_64.sh"
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v27
+        with:
+          nix_path: nixpkgs=channel:nixpkgs-unstable
+      - run: nix-channel --update
+
+      - name: Nix channel update
+        run: nix-channel --update
+
+      - name: Install ArrayFire prerequisites
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y gcc libfreeimage-dev libatlas3-base libfftw3-dev cmake ocl-icd-libopencl1
+
+      - name: Download and install ArrayFire
+        run: |
+          wget -q "$AF_URL" -O "$AF_INSTALLER"
+          chmod +x "$AF_INSTALLER"
+          sudo "./$AF_INSTALLER" --exclude-subdir --prefix=/opt
+          sudo ldconfig
+
+      - name: Update cabal package list
+        run: cabal update
+
+      - name: Build
+        run: nix-shell -p ghc -p cabal-install --keep LD_LIBRARY_PATH --run 'cabal build'
+        env:
+          LD_LIBRARY_PATH: "/opt/arrayfire/lib:/opt/arrayfire/lib64"