release: Add a script to create releases on GitHub

.github/workflows/create-github-release.yml

@@ -13,13 +13,20 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
-      - name: Create release on GitHub
-        uses: actions/create-release@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GH_SERVICE_ACCOUNT_TOKEN }}
+
+      - name: use node.js 12.x
+        uses: actions/setup-node@v1
         with:
-          tag_name: ${{ github.ref }}
-          release_name: ${{ github.ref }}
-          body: 'Changelog https://github.com/backstage/backstage/blob/master/CHANGELOG.md'
-          draft: false
-          prerelease: false
+          node-version: '12.x'
+
+      - name: Install node dependencies
+        run: yarn install @octokit/rest
+
+      # GITHUB_REF is of the format refs/tags/vA.B.C
+      # This step extracts vA.B.C from GITHUB_REF
+      - name: Get the version
+        id: get_version
+        run: echo "::set-output name=TAG_NAME::${GITHUB_REF#refs/tags/}"
+
+      - name: Create release on GitHub
+        run: node scripts/create-github-release.js ${{ steps.get_version.outputs.TAG_NAME }} ${{ secrets.GH_SERVICE_ACCOUNT_TOKEN }} 1