Firebase distribution using Fastlane

build-app.yaml

name: build-app
on:
  workflow_dispatch:
    inputs:
      environment:
        description: Define an environment to deploy
        required: true
        default: beta
      platform:
        description: App Platform
        required: true
        default: android

jobs:
  build:
    runs-on: macos-latest
    steps:
      - uses: actions/checkout@v2
      - name: Install dependencies
        run: yarn install --frozen-lockfile
      - name: Add git credentials
        run: |
          git config user.name "${GITHUB_ACTOR}"
          git config user.email "${GITHUB_ACTOR}@users.noreply.github.com"
      - name: Install Pods
        if: ${{ github.event.inputs.platform == 'ios'}}
        run: npx pod-install
      - name: Build App
        run: fastlane ${{ github.event.inputs.platform }} ${{ github.event.inputs.environment }}
        env:
          FIREBASE_TOKEN: ${{ secrets.FIREBASE_TOKEN }}
          FIREBASE_IOS_APP_ID: ${{ secrets.FIREBASE_IOS_APP_ID }}
          FIREBASE_ANDROID_APP_ID: ${{ secrets.FIREBASE_ANDROID_APP_ID }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

Fastfile

# This file contains the fastlane.tools configuration
# You can find the documentation at https://docs.fastlane.tools
#
# For a list of all available actions, check out
#
#     https://docs.fastlane.tools/actions
#
# For a list of all available plugins, check out
#
#     https://docs.fastlane.tools/plugins/available-plugins
#

platform :ios do
    desc "Build iOS Application"
    private_lane :build do
      gym(
        workspace: './ios/PROJECT.xcworkspace',
        scheme: "SCHEME_PROJECT",
        export_method: 'development'
      )
    end
    desc "Increment iOS build number"
    private_lane :increment_ios_build_number do
      package = load_json(json_path: './package.json')
      version = package['version']
      project_path = './ios/PROJECT.xcodeproj'
  
      increment_version_number(
        xcodeproj: project_path,
        version_number: version
      )
  
      increment_build_number(
        xcodeproj: project_path
      )
    end
    desc "Ship to Firebase"
     lane :beta do
        build
        firebase_app_distribution(
            app: ENV["FIREBASE_IOS_APP_ID"],
            firebase_cli_token: ENV["FIREBASE_TOKEN"],
            groups: "qa-team, dev-team",
            release_notes: "Lots of amazing new features to test out!",
        )
        increment_ios_build_number
        commit_version_bump(message: 'Bump build', xcodeproj: './ios/PROJECT.xcodeproj')
        push_to_git_remote
    end
  end
  
  platform :android do
      desc "Build Android Application"
      private_lane :build do
        build_android_app(task: 'assembleRelease', project_dir: 'android/')
      end
      desc "Increment Android versionCode"
      private_lane :increment_android_version_code do
        gradle_path = "./android/app/build.gradle"
        package = load_json(json_path: './package.json')
        version = package['version']
  
        increment_version_name(
          gradle_file_path: gradle_path,
          version_name: version
        )
        
        increment_version_code(
          gradle_file_path: gradle_path
        )
      end
      desc "Ship to Firebase"
      lane :beta do
          build
          firebase_app_distribution(
              app: ENV["FIREBASE_ANDROID_APP_ID"],
              firebase_cli_token: ENV["FIREBASE_TOKEN"],
              groups: "qa-team, dev-team",
              release_notes: "Lots of amazing new features to test out!",
          )
          increment_android_version_code
          git_commit(path: ['./android/app/build.gradle'], message: 'Bump versionCode')
          push_to_git_remote
      end
  end

Pluginfile

# Autogenerated by fastlane
#
# Ensure this file is checked in to source control!

gem 'fastlane-plugin-firebase_app_distribution'
gem 'fastlane-plugin-increment_version_code'
gem 'fastlane-plugin-increment_version_name'
gem 'fastlane-plugin-load_json'