Extract common steps into GitHub action template

Author: Wei Sun

.github/actions/test-verify-action/action.yml

@@ -0,0 +1,32 @@
+---
+name: Test & Coverage
+description: Run tests, optionally gather coverage data and run danger
+inputs:
+  include-coverage:
+    description: Option to include a danger-swift coverage step
+    required: false
+    default: "false"
+  danger-token:
+    description: Option to include a token for danger related step
+    required: false
+    default: ""
+
+runs:
+  using: composite
+
+  steps:
+    - name: Run Tests
+      run: |
+        if [ ${{ inputs.include-coverage }} = true ]; then
+          npm install -g danger
+          swift test --enable-code-coverage
+          swift run danger-swift ci \
+            -c release \
+            --dangerfile DangerfileCoverage.swift \
+            --id "Coverage"
+        else
+          swift test
+        fi
+      shell: bash
+      env:
+        DANGER_GITHUB_API_TOKEN: ${{ inputs.danger-token }}

.github/workflows/gha_pull_request.yml

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+---
+name: Verify
+
+on:
+  pull_request:
+    branches:
+      - master
+  push:
+    branches:
+      - master
+
+jobs:
+  danger:
+    runs-on: ubuntu-latest
+    name: "🚫 Run Danger"
+    steps:
+      - uses: actions/checkout@v2
+      - run: npm install -g danger
+      - run: swift run danger-swift ci -c release --id "Lint"
+    env:
+      DANGER_GITHUB_API_TOKEN: ${{ secrets.DANGER_SWIFT_GITHUB_TOKEN }}
+
+  linux:
+    runs-on: ubuntu-latest
+    name: 🐧 Linux Test & Verify
+    steps:
+      - uses: actions/checkout@v2
+      - name: Test
+        uses: ./.github/actions/test-verify-action
+        with:
+          include-coverage: false
+
+  macos:
+    runs-on: macos-11
+    name:  MacOS Test & Verify
+    steps:
+      - uses: actions/checkout@v2
+      - name: Test & Coverage
+        uses: ./.github/actions/test-verify-action
+        with:
+          include-coverage: true
+          danger-token: ${{ secrets.DANGER_SWIFT_GITHUB_TOKEN }}
+
+env:
+  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}