16th January 2022

Computer Science⚑

GNULinux⚑

Android⚑

• New: Automatic version code generation.

  If you use semantic versioning and you don't want to increment the version code manually, replace the related config from android/app/build.gradle with:

  def flutterVersionName = localProperties.getProperty('flutter.versionName')
  if (flutterVersionName == null) {
      flutterVersionName = '1.0.0'
  }
  
  def semanticVersion = flutterVersionName.split('\\+')
  def versionCore = semanticVersion[0]
  def build = semanticVersion.length >= 2 ? semanticVersion[1].toInteger() : 0
  def (major, minor, patch) = versionCore.tokenize('.').collect{it.toInteger()}
  def flutterVersionCode = 1000000 * major + 10000 * minor + 100 * patch + build
  

  Then whenever pubspec.yaml version veriable changes and you build an APK or appbundle, the version code will be generated from it.

  Examples (version name -> version code):

  • 1.2.0 -> 1020000
  • 3.0.1+99 -> 3000199

• New: Signing the APK/AppBundle.

  First of all, create a key if you don't have one with:

  keytool -genkey -v -keystore {{ keystore_file }} -alias {{ key_alias }} \
    -keyalg RSA -keysize 4096 -validity 10000
  

  Replace signingConfigs with:

    signingConfigs {
         release {
          keyAlias "$System.env.KEY_ALIAS"
          keyPassword "$System.env.KEY_PASSWORD"
          storeFile file("$System.env.KEY_PATH")
          storePassword "$System.env.STORE_PASSWORD"
      }
     }
     buildTypes {
         release {
             signingConfig signingConfigs.release
         }
     }
  

  Now, you can set the corresponding environment variables. This configuration is particularily useful if you want to have a CI build and sign the releases.

  Check store file as secret to save the generated keystore file as a CI secret.

Other⚑

• New: Upload to Play Store with CI.

  1. Create a principal in https://console.cloud.google.com/iam-admin/iam with the role Service Account User.
  2. Create and download a new key (JSON format) for the created principal.
  3. In Play Console go to Setup>API access and enable access for the created principal granting Admin (all permissions) to it.
  4. Add the key JSON content as a GitHub Secret (e.g., SERVICE_ACCOUNT_JSON).
  5. Add the following step to your workflow (after flutter build appbundle):

  - name: Upload to Google Play
    uses: r0adkll/upload-google-play@v1.0.15
    with:
      serviceAccountJsonPlainText: ${{ secrets.SERVICE_ACCOUNT_JSON }}
      packageName: {{ package_name }}
      releaseFiles: build/app/outputs/bundle/release/app-release.aab
      track: production