Add .github/workflows/build.yml

.github/workflows/build.yml

@@ -0,0 +1,80 @@
+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:
+          - 7.0.1
+          - 7.0.2
+          - 7.0.3
+          - 7.0.4
+          - 7.2.1
+          - 7.2.2
+          - 7.4.1
+          - 7.4.2
+          - 7.6.1
+          - 7.6.2
+          - 7.6.3
+          - 7.8.1
+          - 7.8.2
+          - 7.8.3
+          - 7.8.4
+          - 7.10.1
+          - 7.10.2
+          - 7.10.3
+          - 8.0.1
+          - 8.0.2
+          - 8.2.1
+          - 8.2.2
+          - 8.4.1
+          - 8.4.2
+          - 8.4.3
+          - 8.4.4
+          - 8.6.1
+          - 8.6.2
+          - 8.6.3
+          - 8.6.4
+          - 8.6.5
+          - 8.8.1
+          - 8.8.2
+          - 8.8.3
+          - 8.8.4
+          - 8.10.1
+          - 8.10.2
+          - 8.10.3
+    steps:
+      - uses: actions/checkout@v2
+      - uses: haskell/actions/setup@v1
+        with:
+          ghc-version: ${{ matrix.ghc }}
+
+      - run: |
+          mkdir -p "$HOME/.local/bin"
+          curl -L https://github.com/haskell-compat/base-compat/releases/download/typediff-0.1.4/typediff > "$HOME/.local/bin/typediff"
+          chmod a+x "$HOME/.local/bin/typediff"
+          echo "$HOME/.local/bin" >> "$GITHUB_PATH"
+
+      - 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'