Add .github/workflows/build.yml

.github/workflows/build.yml

@@ -0,0 +1,50 @@
+name: build
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    name: ${{ matrix.os }} / GHC ${{ matrix.ghc }}
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os:
+          - ubuntu-16.04 # https://launchpad.net/~hvr/+archive/ubuntu/ghc?field.series_filter=xenial
+        ghc:
+          - '7.4.2'
+          - '7.6.3'
+          - '7.8.4'
+          - '7.10'
+          - '8.0'
+          - '8.2'
+          - '8.4'
+          - '8.6'
+          - '8.8'
+          - '8.10'
+        include:
+          - os: macos-latest
+            ghc: latest
+          - os: windows-latest
+            ghc: latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: haskell/actions/setup@v1
+        with:
+          ghc-version: ${{ matrix.ghc }}
+      - uses: sol/run-haskell-tests@v1
+
+  success:
+    needs: build
+    runs-on: ubuntu-latest
+    if: always() # this is required as GitHub considers "skipped" jobs as "passed" when checking branch protection rules
+
+    steps:
+      - run: false
+        if: needs.build.result != 'success'

cabal.project

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+packages:
+  hspec-expectations.cabal
+
+package hspec-expectations
+  ghc-options: -Werror