Gitlab-ci.yml and Fastlane

Fastfile

# update_fastlane
default_platform(:ios)

platform :ios do

    def build_appname( configuration, schema, export_method )
        build_app(
            workspace: "appname.xcworkspace",
            configuration: configuration,
            scheme: schema,
            silent: true,
            clean: true,
            include_symbols: true,
            include_bitcode: true,
            export_method: export_method,
            output_directory: "build/",
            output_name: "appnameApp.ipa",
            suppress_xcode_output: true,
        )
    end

    def deploy_appname( testerGroup, teamId, teamName )
        changelog = File.read("../RELEASE_NOTES.txt")
        upload_to_testflight(
            changelog: changelog,
            username: "service-account@email.com",
            skip_submission: false,
            notify_external_testers: true,
            distribute_external: true,
            beta_app_description: "APPSTORE release",
            groups: testerGroup,
            skip_waiting_for_build_processing: false,
            ipa: '/tmp/appnameApp.ipa',
            team_id: teamId,
            team_name: teamName
        )
    end
    
    def firebase_deploy( group, appId )
        changelog = File.read("../RELEASE_NOTES.txt")
        firebase_app_distribution(
            app: appId,
            release_notes: changelog,
            ipa_path: '/tmp/appnameApp.ipa',
            groups: group
        )
    end


    # ------------------------------------------------------
    ### BUILD
    # ------------------------------------------------------

    lane :dev_eu do
        build_appname( "Release-DEV", "Target-1", "enterprise" ) ### enterprise certificate
	end

    lane :qlt_eu do
        build_appname( "Release-QLT", "Target-1", "enterprise" ) ### enterprise certificate
    end

    lane :prd_eu do
        build_appname( "Release-PRD", "Target-1", "app-store" ) ### distribution certificate
    end


    lane :dev_usa do
        build_appname( "Release-DEV", "Target-2", "app-store" ) ### distribution certificate
    end

    lane :qlt_usa do
        build_appname( "Release-QLT", "Target-2", "app-store" ) ### distribution certificate
    end

    lane :prd_usa do
        build_appname( "Release-PRD", "Target-2", "app-store" ) ### distribution certificate
    end


    # ------------------------------------------------------
    ### DEPLOY
    # ------------------------------------------------------


    lane :dev_eu_deploy do
        # deploy_appname( "DEV-EU-Testers", "XXXXXX", "Company A S.p.A." ) ### account enterprise
        firebase_deploy( "DEV-EU-Testers", "XXXXXX" )
	end

    lane :qlt_eu_deploy do
        # deploy_appname( "QLT-EU-Testers", "XXXXXX", "Company A S.p.A." ) ### account enterprise
        firebase_deploy( "QLT-EU-Testers", "XXXXXX" )
    end

    lane :prd_eu_deploy do
        deploy_appname( "PRD-EU-Testers", "YYYYYY", "Company B S.p.A." ) ### account distribution
    end

    # ------------------------------------------------------

    lane :dev_usa_deploy do
        deploy_appname( "DEV-USA-Testers", "ZZZZZZ", "Company C S.p.A." ) ### account distribution
    end

    lane :qlt_usa_deploy do
        deploy_appname( "QLT-USA-Testers", "ZZZZZZ", "Company C S.p.A." ) ### account distribution
    end

    lane :prd_usa_deploy do
        deploy_appname( "PRD-USA-Testers", "ZZZZZZ", "Company C S.p.A." ) ### account distribution
    end

end

gitlab-ci.yml

#------------------------------------------------------------------------------------------------

stages:
  - build
  - deploy


#------------------------------------------------------------------------------------------------
# BUILD
#------------------------------------------------------------------------------------------------

build_eu_app-dev: &build_app
  before_script:
    - pod repo update
    - pod check || pod install ### install pods if needed
  stage: build
  script:
    - fastlane $CI_ENVIRONMENT_NAME
    - cp build/appName.ipa /tmp/appName.ipa ### copy the build to /tmp for fast deploy
  after_script:
    - yes | rm -rf /Users/appName/Library/Developer/Xcode/Archives/    ### clean local storage
    - yes | rm -rf /Users/appName/Library/Developer/Xcode/DerivedData/ ### clean local storage
  artifacts:
    paths:
      - build/
  environment:
    name: dev_eu
  tags:
    - macos ### use local machine

build_eu_app-qlt:
  <<: *build_app
  when: manual
  environment:
    name: qlt_eu

build_eu_app-prd:
  <<: *build_app
  when: manual
  environment:
    name: prd_eu

#------------------------------------------------------------------------------------------------

build_usa_app-dev:
  <<: *build_app
  when: manual
  environment:
    name: dev_usa

build_usa_app-qlt:
  <<: *build_app
  when: manual
  environment:
    name: qlt_usa

build_usa_app-prd:
  <<: *build_app
  when: manual
  environment:
    name: prd_usa



#------------------------------------------------------------------------------------------------
# DEPLOY
#------------------------------------------------------------------------------------------------

deploy_eu_app-dev: &deploy_app
  stage: deploy
  only:
    - master
  script:
    - fastlane $CI_ENVIRONMENT_NAME
  after_script:
    - yes | rm -rf /tmp/appName.ipa ### clean deployed local IPA
  environment:
    name: dev_eu_deploy
  dependencies:
    - build_eu_app-dev
  tags:
    - macos

deploy_eu_app-qlt:
  <<: *deploy_app
  when: manual
  environment:
    name: qlt_eu_deploy
  dependencies:
    - build_eu_app-qlt

deploy_eu_app-prd:
  <<: *deploy_app
  when: manual
  environment:
    name: prd_eu_deploy
  dependencies:
    - build_eu_app-prd

#------------------------------------------------------------------------------------------------

deploy_usa_app-dev:
  <<: *deploy_app
  when: manual
  environment:
    name: dev_usa_deploy
  dependencies:
    - build_usa_app-dev

deploy_usa_app-qlt:
  <<: *deploy_app
  when: manual
  environment:
    name: qlt_usa_deploy
  dependencies:
    - build_usa_app-qlt

deploy_usa_app-prd:
  <<: *deploy_app
  when: manual
  environment:
    name: prd_usa_deploy
  dependencies:
    - build_usa_app-prd