GitHub Actions: trigger on release creation

.github/workflows/test-and-release.yml

@@ -3,8 +3,9 @@ on:
   push:
     branches:
       - '*'
-    tags:
-       - 'v*'
+  release:
+    types:
+      - created
 jobs:
   test:
     runs-on: ${{ matrix.os }}
@@ -29,7 +30,7 @@ jobs:
         name: coverage
         path: coverage.html
   build-linux:
-    if: startsWith(github.ref, 'refs/tags/v')
+    if: startsWith(github.ref, 'refs/releases/')
     needs: test
     runs-on: ubuntu-18.04
     steps:
@@ -48,7 +49,7 @@ jobs:
           name: gotransit-linux
           path: ${{ github.workspace }}/cmd/gotransit/gotransit
   build-macos:
-    if: startsWith(github.ref, 'refs/tags/v')
+    if: startsWith(github.ref, 'refs/releases/')
     needs: test
     runs-on: macos-latest
     steps:
@@ -67,20 +68,13 @@ jobs:
           name: gotransit-macos
           path: ${{ github.workspace }}/cmd/gotransit/gotransit
   release:
-    if: startsWith(github.ref, 'refs/tags/v')
+    if: startsWith(github.ref, 'refs/releases/')
     needs: [build-linux, build-macos]
     runs-on: ubuntu-18.04
     steps:
-      - name: Create GitHub release
-        id: create_release
-        uses: actions/[email protected]
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          tag_name: ${{ github.ref }}
-          release_name: Release ${{ github.ref }}
-          draft: false
-          prerelease: false
+      - name: "Get release upload_url"
+        run: echo "::set-output name=upload_url::https://uploads.github.com/repos/$GITHUB_REPOSITORY/releases/$(jq --raw-output '.release.id' $GITHUB_EVENT_PATH)/assets{?name,label}"  
+        id: release
       - name: Download Linux binary
         uses: actions/download-artifact@v1
         with:
@@ -90,7 +84,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
-          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          upload_url: ${{ steps.release.outputs.upload_url }}
           asset_path: ${{ github.workspace }}/gotransit-linux/gotransit
           asset_name: gotransit-linux
           asset_label: Linux AMD-64 binary
@@ -104,7 +98,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
-          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          upload_url: ${{ steps.release.outputs.upload_url }}
           asset_path: ${{ github.workspace }}/gotransit-macos/gotransit
           asset_name: gotransit-macos
           asset_label: macOS AMD-64 binary