Matrix testing

.github/workflows/haskell.yml

@@ -10,34 +10,41 @@ permissions:
   contents: read
 
 jobs:
-  build:
-
-    runs-on: ubuntu-latest
+  cabal:
+    name: ${{ matrix.os }} / ghc ${{ matrix.ghc }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        include:
+          - cabal: "3.8.1"
+            ghc: "8.8.4"
+            os: ubuntu-latest
+          - cabal: "3.8.1"
+            ghc: "8.10.7"
+            os: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
-    - uses: actions/setup-haskell@v1
+    - uses: actions/checkout@v3
+    - uses: haskell/actions/setup@v2
+      id: setup-haskell-cabal
+      name: Setup Haskell
       with:
-        ghc-version: '8.10.3'
-        cabal-version: '3.2'
+        ghc-version: ${{ matrix.ghc }}
+        cabal-version: ${{ matrix.cabal }}
 
-    - name: Cache
-      uses: actions/cache@v3
-      env:
-        cache-name: cache-cabal
+    - name: Freeze
+      run: |
+        cabal configure
+        cabal freeze
+    - uses: actions/cache@v1
+      name: Cache ~/.cabal/store
       with:
-        path: ~/.cabal
-        key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/*.cabal') }}-${{ hashFiles('**/cabal.project') }}
-        restore-keys: |
-          ${{ runner.os }}-build-${{ env.cache-name }}-
-          ${{ runner.os }}-build-
-          ${{ runner.os }}-
+        path: ${{ steps.setup-haskell-cabal.outputs.cabal-store }}
+        key: ${{ runner.os }}-${{ matrix.ghc }}-${{ hashFiles('cabal.project.freeze') }}
 
-    - name: Install dependencies
-      run: |
-        cabal update
-        cabal build --only-dependencies --enable-tests --enable-benchmarks
     - name: Build
-      run: cabal build --enable-tests --enable-benchmarks all
-    - name: Run tests
-      run: cabal test all
+      run: |
+        cabal build
+    - name: Test
+      run: |
+        cabal test