fix for haskell.yml workflow

Author: goodlyrottenapple

.github/workflows/haskell.yml

@@ -36,94 +36,50 @@ jobs:
         - { build: stack, resolver: "--resolver lts-14"  }   # ghc-8.6.5
         - { build: stack, resolver: "--resolver nightly" }
         - { build: stack, resolver: ""                   }
-        - { build: cabal, ghc: 8.0.2, cabal-install: "2.0"  }   # setup-haskell only supports cabal-install 2.0 and higher
-        - { build: cabal, ghc: 8.2.2, cabal-install: "2.0"  }
-        - { build: cabal, ghc: 8.4.4, cabal-install: "2.2"  }
-        - { build: cabal, ghc: 8.6.5, cabal-install: "2.4"  }
-        - { build: cabal, ghc: 8.8.1, cabal-install: "2.4"  }   # currently not working for >= 3.0
         # use this to include any dependencies from OS package managers
         include: []
         # - os: macOS-latest
         #   brew: anybrewdeps
         # - os: ubuntu-latest
         #   apt-get: happy libblas-dev liblapack-dev
 
-        exclude:
-        - os: macOS-latest
-          plan:
-            build: cabal
-
     runs-on: ${{ matrix.os }}
     steps:
     - name: Install OS Packages
       uses: mstksg/get-package@v1
       with:
         apt-get: ${{ matrix.apt-get }}
         brew: ${{ matrix.brew }}
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
 
-    - name: Setup stack
-      uses: mstksg/setup-stack@v1
+    - name: Checkout
+        uses: actions/checkout@v2
 
-    - name: Setup cabal-install
-      uses: actions/setup-haskell@v1
-      with:
-        ghc-version: ${{ matrix.plan.ghc }}
-        cabal-version: ${{ matrix.plan.cabal-install }}
-      if: matrix.plan.build == 'cabal'
+    - name: Cache Local
+        id: cache-local
+        uses: actions/cache@v1
+        with:
+          path: ~/.local/
+          key: ${{ runner.os }}-local-v1
 
-    - name: Install dependencies
-      run: |
-        set -ex
-        case "$BUILD" in
-          stack)
-            stack --no-terminal --install-ghc $ARGS test --bench --only-dependencies
-            ;;
-          cabal)
-            cabal --version
-            cabal update
-            PACKAGES=$(stack --install-ghc query locals | grep '^ *path' | sed 's@^ *path:@@')
-            cabal install --only-dependencies --enable-tests --enable-benchmarks --force-reinstalls --ghc-options=-O0 --reorder-goals --max-backjumps=-1 $CABALARGS $PACKAGES
-            ;;
-        esac
-        set +ex
-      env:
-        ARGS: ${{ matrix.plan.resolver }}
-        BUILD: ${{ matrix.plan.build }}
+      - name: Cache Stack
+        id: cache-stack
+        uses: actions/cache@v1
+        with:
+          path: ~/.stack
+          key: ${{ runner.os }}-stack-v1
+
+      - name: Cache Cabal
+        id: cache-cabal
+        uses: actions/cache@v1
+        with:
+          path: ~/.cabal
+          key: ${{ runner.os }}-cabal-v1
 
     - name: Build
       run: |
-        set -ex
-        case "$BUILD" in
-          stack)
-            stack --no-terminal $ARGS test --bench --no-run-benchmarks --haddock --no-haddock-deps
-            ;;
-          cabal)
-            PACKAGES=$(stack --install-ghc query locals | grep '^ *path' | sed 's@^ *path:@@')
-            cabal install --enable-tests --enable-benchmarks --force-reinstalls --ghc-options=-O0 --reorder-goals --max-backjumps=-1 $CABALARGS $PACKAGES
-            ORIGDIR=$(pwd)
-            for dir in $PACKAGES
-            do
-              cd $dir
-              cabal check || [ "$CABALVER" == "1.16" ]
-              cabal sdist
-              PKGVER=$(cabal info . | awk '{print $2;exit}')
-              SRC_TGZ=$PKGVER.tar.gz
-              cd dist
-              tar zxfv "$SRC_TGZ"
-              cd "$PKGVER"
-              cabal configure --enable-tests --ghc-options -O0
-              cabal build
-              if [ "$CABALVER" = "1.16" ] || [ "$CABALVER" = "1.18" ]; then
-                cabal test
-              else
-                cabal test --show-details=streaming --log=/dev/stdout
-              fi
-              cd $ORIGDIR
-            done
-            ;;
-        esac
-        set +ex
-      env:
-        ARGS: ${{ matrix.plan.resolver }}
-        BUILD: ${{ matrix.plan.build }}
+        stack build --ghc-options="-Werror" --only-dependencies
+
+    - name: Test
+      run: |
+        stack test --ghc-options="-Werror"