~/.circleci/config.yml ref:Qiita記事「CircleCI 2.1 と fastlane で Flutter の iOS と Android をビルドして DeployGate で配布する」

config.yml

version: 2.1
executors:
  default_android:
    shell: /bin/bash --login -eo pipefail
    environment:
      LC_ALL: en_US.UTF-8
      LANG: en_US.UTF-8
    working_directory: ~/flutterApp
    docker:
      - image: cirrusci/flutter:latest
  default_ios:
    shell: /bin/bash --login -eo pipefail
    environment:
      LC_ALL: en_US.UTF-8
      LANG: en_US.UTF-8
    working_directory: ~/flutterApp
    macos:
      # https://circleci.com/docs/2.0/testing-ios/#supported-xcode-versions
      xcode: "10.1.0"

commands:
  install_flutter:
    steps:
      - run:
          name: Install flutter SDK
          command: mkdir -p ~/sdks/flutter && git clone -b stable https://github.com/flutter/flutter.git ~/sdks/flutter
      - run:
          name: Set flutter SDK PATH in bash
          command: echo 'export FLUTTER_HOME=~/sdks/flutter' >> $BASH_ENV && source $BASH_ENV
  setup_flutter:
    steps:
      - run:
          name: Run flutter doctor
          command: $FLUTTER_HOME/bin/flutter doctor
      - run:
          name: Run flutter analyze
          command: $FLUTTER_HOME/bin/flutter analyze
  setup_bundle:
    parameters:
      platform:
        type: enum
        enum: ['android', 'ios']
    steps:
      - run:
          name: Set ruby version
          command: echo "ruby-2.4" > ~/.ruby-version
      - run:
          name: Run bundle install
          command: bundle install --path vendor/bundle
          working_directory: ~/flutterApp/<< parameters.platform >>
          environment:
            BUNDLE_JOBS: 4
            BUNDLE_RETRY: 3
  setup_ios_build_setting:
    steps:
      - run:
         name: Run pod setup
         command: curl https://cocoapods-specs.circleci.com/fetch-cocoapods-repo-from-s3.sh | bash -s cf
         working_directory: ~/flutterApp/ios
  flutter_build:
    parameters:
      platform:
        type: enum
        enum: ['android', 'ios']
      configuration:
        type: enum
        enum: ['development', 'staging', 'production']
    steps:
      - run:
          name: Run build << parameters.platform >> app in << parameters.configuration >>
          command: bundle exec fastlane << parameters.platform >> << parameters.configuration >>
          working_directory: ~/flutterApp/<< parameters.platform >>

jobs:
  beta_development_android:
    executor:
      name: default_android
    steps:
      - checkout
      - setup_flutter
      - setup_bundle:
          platform: android
      - flutter_build:
          platform: android
          configuration: development
  beta_development_ios:
    executor:
      name: default_ios
    steps:
      - checkout
      - install_flutter
      - setup_flutter
      - setup_bundle:
          platform: ios
      - setup_ios_build_setting
      - flutter_build:
          platform: ios
          configuration: development

workflows:
  build-debug:
    jobs:
      - beta_development_android:
          filters:
            branches:
              only:
                - /dev_.*/
      - beta_development_ios:
          filters:
            branches:
              only:
                - /dev_.*/