CI: add Cabal-macOS workflow (#35)

Author: Anton-Latukha

.github/workflows/Cabal-macOS.yml

@@ -0,0 +1,41 @@
+name: "Hackage, Cabal, macOS"
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+  schedule:
+    - cron: "45 02 * * *"
+
+
+jobs:
+
+  build10:
+    name: "GHC"
+    runs-on: macos-latest
+    continue-on-error: true
+    # Template to build matrix of builds for subprojects in monorepo
+    strategy:
+      matrix:
+        packageRoots: [ ./ ]
+        ghc: [ "8.10" ]
+    defaults:
+      run:
+        working-directory: "${{ matrix.packageRoots }}"
+    steps:
+      - uses: actions/checkout@v2
+      - name: "Cache of ~/.cabal/packages, ~/.cabal/store and dist-newstyle"
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cabal/packages
+            ~/.cabal/store
+            dist-newstyle
+          key: "${{ runner.os }}-Cabal-${{ matrix.ghc }}"
+      - uses: haskell/actions/setup@v1
+        with:
+          ghc-version: ${{ matrix.ghc }}
+      - run: "cabal v2-configure --disable-optimization --enable-tests --enable-deterministic"
+      - run: "cabal v2-build"
+      - run: "cabal v2-test"