ci: use gha & attic for building/caching

1 files changed, 124 insertions, 0 deletions

diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
new file mode 100644
index 0000000..cf2ccbc
--- /dev/null
+++ b/.github/workflows/ci.yaml
@@ -0,0 +1,124 @@
+name: CI
+
+on:
+  pull_request:
+  workflow_dispatch:
+  workflow_call:
+    secrets:
+      ATTIC_TOKEN:
+        required: false
+
+jobs:
+  eval:
+    name: Evaluate flake
+
+    runs-on: ubuntu-latest
+
+    outputs:
+      matrix: ${{ steps.generate.outputs.matrix }}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@v9
+
+      - name: Generate matrix
+        id: generate
+        run: |
+          set -Eeu
+          echo "matrix=$(nix eval --show-trace --json .#githubWorkflow.matrix)" >> "$GITHUB_OUTPUT"
+
+  build:
+    needs: eval
+
+    strategy:
+      fail-fast: false
+      matrix: ${{ fromJSON(needs.eval.outputs.matrix) }}
+
+    runs-on: ${{ matrix.os }}
+
+    name: Build (${{matrix.attr}})
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Qemu
+        if: matrix.arch == 'aarch64'
+        uses: docker/setup-qemu-action@v3
+        with:
+          platforms: "arm64"
+
+      - name: Install Nix
+        if: matrix.arch != 'aarch64'
+        uses: DeterminateSystems/nix-installer-action@v9
+
+      - name: Install Nix (with aarch64)
+        if: matrix.arch == 'aarch64'
+        uses: DeterminateSystems/nix-installer-action@v9
+        with:
+          extra-conf: "extra-platforms = aarch64-linux arm-linux"
+
+      - name: Setup Attic 
+        if: github.event_name != 'pull_request'
+        uses: ryanccn/attic-action@v0
+        with:
+          endpoint: https://cache.mydadleft.me
+          cache: getchoo
+          token: ${{ secrets.ATTIC_TOKEN }}
+
+      - name: Setup Magic Nix Cache
+        uses: DeterminateSystems/magic-nix-cache-action@v2
+
+      - name: Build ${{ matrix.attr }}
+        run: nix build -L --accept-flake-config --fallback .#${{ matrix.attr }}
+
+  check:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest, ubuntu-latest]
+
+    runs-on: ${{ matrix.os }}
+
+    name: Check flake (${{ matrix.os }})
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@v9
+
+      - name: Setup Attic 
+        if: github.event_name != 'pull_request'
+        uses: ryanccn/attic-action@v0
+        with:
+          endpoint: https://cache.mydadleft.me
+          cache: getchoo
+          token: ${{ secrets.ATTIC_TOKEN }}
+
+      - name: Setup Magic Nix Cache
+        uses: DeterminateSystems/magic-nix-cache-action@v2
+
+      - name: Run check
+        run: nix flake check -L --accept-flake-config --show-trace
+
+  # https://github.com/orgs/community/discussions/26822#discussioncomment-3305794
+  gate:
+    name: CI Gate
+    needs: [build, check]
+    runs-on: ubuntu-latest
+
+    if: always()
+
+    steps:
+      - name: Exit with result
+        run: |
+          buildResult="${{ needs.build.result }}"
+          checkResult="${{ needs.check.result }}"
+
+          results=("$buildResult" "$checkResult")
+
+          for result in "${results[@]}"; do [ "$result" != "success" ] && exit 1; done
+
+          exit 0