Add an action to run smalltalkCI on a PR being made or a commit is pushed.

.github/workflows/smalltalk-ci.yml

@@ -0,0 +1,31 @@
+name: CI matrix
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  build:
+    strategy:
+      matrix:
+        os: [ macos-latest, windows-latest, ubuntu-latest]
+        smalltalk: [ Pharo64-8.0 ]
+    runs-on: ${{ matrix.os }}
+    name: ${{ matrix.smalltalk }} on ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup smalltalkCI
+        uses: hpi-swa/setup-smalltalkCI@v1
+        with:
+          smalltalk-version: ${{ matrix.smalltalk }}
+      - name: Load Image and Run Tests
+        run: smalltalkci -s ${{ matrix.smalltalk }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        timeout-minutes: 15