Replace travis CI with github actions (#51)

* Use github actions for basic testing

* Remove travis

* Use CPP

* Run tests without fast

* Add more stackage resolvers

.github/workflows/tests.yml

@@ -0,0 +1,75 @@
+name: Tests
+
+on:
+    pull_request:
+    push:
+      branches:
+      - master
+
+jobs:
+  build:
+    name: CI
+    runs-on: ${{ matrix.os }}
+    env:
+      STACK_ROOT: ${{ github.workspace }}/.stack
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+        - os: ubuntu-latest
+          stack-yaml: stack.yaml
+          resolver: lts-21
+        - os: macos-latest
+          stack-yaml: stack.yaml
+          resolver: lts-21
+        - os: windows-latest
+          stack-yaml: stack.yaml
+          resolver: lts-21
+        - os: ubuntu-latest
+          stack-yaml: stack.yaml
+          resolver: lts-20
+        - os: macos-latest
+          stack-yaml: stack.yaml
+          resolver: lts-20
+        - os: windows-latest
+          stack-yaml: stack.yaml
+          resolver: lts-20
+        - os: ubuntu-latest
+          stack-yaml: stack.yaml
+          resolver: lts-19
+        - os: macos-latest
+          stack-yaml: stack.yaml
+          resolver: lts-19
+        - os: windows-latest
+          stack-yaml: stack.yaml
+          resolver: lts-19
+
+    steps:
+      - name: Clone project
+        uses: actions/checkout@v2
+        with:
+          submodules: 'true'
+
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.stack
+            ${{ github.workspace }}/.stack
+          key: ${{ runner.os }}-${{ matrix.resolver }}-haskell-${{ hashFiles('stack.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-${{ matrix.resolver }}-haskell-
+
+      - name: Build and run tests
+        shell: bash
+        run: |
+            set -ex
+            if [ "$RUNNER_OS" == "Linux" ] || [ "$RUNNER_OS" == "macOS" ]; then
+                curl -sSL https://get.haskellstack.org/ | sh -s - -f
+            fi
+            stack test --no-terminal --stack-yaml=${{ matrix.stack-yaml }} --resolver=${{ matrix.resolver }}
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          generate_release_notes: true

src/Weigh.hs

@@ -75,7 +75,9 @@ module Weigh
 import Control.Applicative
 import Control.Arrow
 import Control.DeepSeq
+#if MIN_VERSION_base(4,18,0)
 import Control.Monad (unless)
+#endif
 import Control.Monad.State
 import Criterion.Measurement
 import qualified Data.Foldable as Foldable

stack.yaml

@@ -1,2 +1 @@
-resolver: lts-11.3
-#resolver: nightly-2017-11-23
+resolver: lts-19.33

stack.yaml.lock

@@ -6,7 +6,7 @@
 packages: []
 snapshots:
 - completed:
-    size: 506659
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/11/3.yaml
-    sha256: 4a02ab9386e5968c58529fdf79707ccd0ae1352c213e28a78ee9e0d836be1824
-  original: lts-11.3
+    sha256: 6d1532d40621957a25bad5195bfca7938e8a06d923c91bc52aa0f3c41181f2d4
+    size: 619204
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/19/33.yaml
+  original: lts-19.33