add comment with link to apk preview when the app is built

.github/workflows/artifacts.yml

@@ -0,0 +1,20 @@
+name: add artifact links to pull request
+on:
+  workflow_run:
+    workflows: ["Upload Preview APK"]
+    types: [completed]
+
+jobs:
+  artifacts-url-comments:
+    name: add artifact links to pull request
+    runs-on: windows-2019
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    steps:
+      - name: add artifact links to pull request
+        uses: tonyhallett/artifacts-url-comments@v1.1.0
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          prefix: "**To test the changes in this pull request, install this apk:**"
+          format: "[📦 {name}]({url})"
+          addTo: pull

.github/workflows/preview-apk.yml

@@ -7,6 +7,10 @@ jobs:
     name: Upload Preview APK
     runs-on: ubuntu-latest
     steps:
+      - name: Cancel Previous Runs
+        uses: styfle/cancel-workflow-action@0.9.1
+        with:
+          access_token: ${{ github.token }}
       - uses: actions/checkout@v2
         with:
           submodules: recursive
@@ -45,5 +49,5 @@ jobs:
       - name: Upload APK
         uses: actions/upload-artifact@v2
         with:
-          name: app.apk
+          name: app-preview.apk
           path: 'build/outputs/apk/gplay/debug/*.apk'