Add nix develop based CI workflow

.github/workflows/ci.yml

@@ -0,0 +1,86 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+env:
+  CACHE_VERSION: v0
+  TERM: dumb
+
+concurrency:
+  group: build-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ghc-version: ['ghc910', 'ghc984', 'ghc966']
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install nix
+        uses: DeterminateSystems/nix-installer-action@main
+        with:
+          extra-conf: |
+            accept-flake-config = true
+            download-buffer-size = 512000000
+
+      - name: Cache nix
+        uses: cachix/cachix-action@v14
+        with:
+          name: gogol
+          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+
+      # There isn't any apparent sensible way to cache stack, so this more or less
+      # follows the imperfect ideas in https://github.com/commercialhaskell/stack/issues/5754
+
+      - name: Cache ~/.stack
+        uses: actions/cache@v4
+        with:
+          key: stack-${{ runner.os }}-${{ matrix.ghc-version }}-${{ env.CACHE_VERSION }}-${{ hashFiles('stack-${{ matrix.ghc-version }}.yaml', '**/*.cabal') }}
+          restore-keys: |
+            stack-${{ runner.os }}-${{ matrix.ghc-version }}-${{ env.CACHE_VERSION }}-
+          path: |
+            ~/.stack
+
+      - name: Cache .stack-work
+        uses: actions/cache@v4
+        with:
+          key: stack-work-${{ runner.os }}-${{ matrix.ghc-version }}-${{ env.CACHE_VERSION }}-${{ hashFiles('stack-${{ matrix.ghc-version }}.yaml', '**/*.cabal') }}-${{ hashFiles('lib/**/*.hs') }}
+          restore-keys: |
+            stack-work-${{ runner.os }}-${{ matrix.ghc-version }}-${{ env.CACHE_VERSION }}-${{ hashFiles('stack-${{ matrix.ghc-version }}.yaml', '**/*.cabal') }}-
+            stack-work-${{ runner.os }}-${{ matrix.ghc-version }}-${{ env.CACHE_VERSION }}-
+          path: |
+            .stack-work
+            **/.stack-work
+
+      - name: Free disk space
+        run: |
+          sudo rm -rf /opt/hostedtoolcache /opt/ghc /usr/share/dotnet /usr/local/lib/android
+          sudo df --human-readable
+          sudo free --human
+          sudo swapon --show
+
+      - name: Build dependencies
+        run: |
+          nix develop .#${{ matrix.ghc-version }} --print-build-logs --command stack build --only-dependencies
+
+      - name: Build libraries
+        run: |
+          nix develop .#${{ matrix.ghc-version }} --print-build-logs --command stack build gogol gogol-core
+
+      - name: Build generator
+        if: matrix.ghc-version == 'ghc910'
+        run: |
+          nix develop .#${{ matrix.ghc-version }} --print-build-logs --command stack build ./gen
+
+      - name: Build services
+        run: |
+          nix develop .#${{ matrix.ghc-version }} --print-build-logs --command stack build ./lib/services

README.md

@@ -1,6 +1,6 @@
 # Gogol
 
-![CI](https://github.com/brendanhay/gogol/actions/workflows/haskell.yml/badge.svg)
+![CI](https://github.com/brendanhay/gogol/actions/workflows/ci.yml/badge.svg)
 [![Hackage Version](https://img.shields.io/hackage/v/gogol.svg)](http://hackage.haskell.org/package/gogol)
 
 * [Description](#description)