Set up release automation (#1915)

Summary:
Depends on https://github.com/facebook/flipper/issues/1914.
This sets up the workflows for automatically building, publishing and "closing" the repository on Maven Central, which is a step you usually need to do manually in the web UI.

Still need to transfer all the secrets over to this repo for it to work.

Pull Request resolved: https://github.com/facebook/flipper/pull/1915

Test Plan:
Ran all of this in my this in my fork and released some `0.0.x` versions.

- Successful workflow: https://github.com/passy/flipper-1/actions/runs/552170713
- It's actually all on Maven: https://repo.maven.apache.org/maven2/com/facebook/flipper/

Reviewed By: jknoxville

Differential Revision: D26367469

Pulled By: passy

fbshipit-source-id: d65f64ee8eec1dc71af64b7e0f87473b9c956fec

.github/workflows/android.yml

@@ -1,29 +0,0 @@
-name: Publish Android Sample App On Release
-
-on:
-  release:
-    types: [created]
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v1
-    - name: set up JDK 1.8
-      uses: actions/setup-java@v1
-      with:
-        java-version: 1.8
-    - name: Install NDK 21
-      run: echo "y" | sudo /usr/local/lib/android/sdk/tools/bin/sdkmanager --install "ndk;21.0.6113669" "ndk;20.0.5594570" --sdk_root=${ANDROID_SDK_ROOT}
-    - name: Build with Gradle
-      run: ./gradlew :sample:assembleDebug :sample:assembleRelease
-    - name: Rename apk
-      run: mv android/sample/build/outputs/apk/debug/sample-debug.apk SampleApp-android.apk
-    - name: Upload
-      uses: skx/github-action-publish-binaries@master
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      with:
-        args: 'SampleApp-android.apk'

.github/workflows/publish-android.yml

@@ -0,0 +1,45 @@
+name: Publish Android
+
+on:
+  push:
+    tags:
+      - v*
+  workflow_dispatch:
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+    - name: Install NDK 20, 21
+      run: echo "y" | sudo /usr/local/lib/android/sdk/tools/bin/sdkmanager --install "ndk;21.0.6113669" "ndk;20.0.5594570" --sdk_root=${ANDROID_SDK_ROOT}
+    - name: Write GPG Sec Ring
+      run: echo '${{ secrets.GPG_KEY_CONTENTS }}' | base64 -d > /tmp/secring.gpg
+    - name: Update gradle.properties
+      run: echo -e "signing.secretKeyRingFile=/tmp/secring.gpg\nsigning.keyId=${{ secrets.SIGNING_KEY_ID }}\nsigning.password=${{ secrets.SIGNING_PASSWORD }}" >> gradle.properties
+    - name: Build artifacts
+      run: ./gradlew :sample:assembleDebug :sample:assembleRelease && ./gradlew :android:assembleRelease
+    - name: Upload Archives
+      run: ./gradlew uploadArchives --no-parallel --no-daemon
+      env:
+        SONATYPE_NEXUS_PASSWORD: ${{ secrets.SONATYPE_NEXUS_PASSWORD }}
+        SONATYPE_NEXUS_USERNAME: ${{ secrets.SONATYPE_NEXUS_USERNAME }}
+    - name: Release and close
+      run: ./gradlew closeAndReleaseRepository
+      env:
+        SONATYPE_NEXUS_PASSWORD: ${{ secrets.SONATYPE_NEXUS_PASSWORD }}
+        SONATYPE_NEXUS_USERNAME: ${{ secrets.SONATYPE_NEXUS_USERNAME }}
+    - name: Rename apk
+      run: mv android/sample/build/outputs/apk/debug/sample-debug.apk SampleApp-android.apk
+    - name: Upload Sample App
+      uses: skx/github-action-publish-binaries@master
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        args: 'SampleApp-android.apk'

.github/workflows/release.yml

@@ -195,3 +195,10 @@ jobs:
         workflow: Publish NPM
         token: ${{ secrets.PERSONAL_TOKEN }}
         ref: ${{ needs.release.outputs.tag }}
+    - name: Publish Android
+      if: ${{ needs.release.outputs.tag != '' }}
+      uses: benc-uk/workflow-dispatch@v1.1
+      with:
+        workflow: Publish Android
+        token: ${{ secrets.PERSONAL_TOKEN }}
+        ref: ${{ needs.release.outputs.tag }}