macOS Podfile template for Flutter apps

macOS-Podfile

# Set the platform at the top
platform :osx, '10.15'

# Rest of the pod file

# Update post_install step
post_install do |installer|
  # Ensure pods use the minimum deployment target set above
  # https://stackoverflow.com/a/64385584/436422
  pods_project = installer.pods_project
  deployment_target_key = 'MACOSX_DEPLOYMENT_TARGET'
  deployment_targets = pods_project.build_configurations.map{ |config| config.build_settings[deployment_target_key] }
  minimum_deployment_target = deployment_targets.min_by{ |version| Gem::Version.new(version) }
  puts 'Setting each pod deployment target to ' + minimum_deployment_target
  installer.pods_project.targets.each do |target|
    flutter_additional_macos_build_settings(target)
    target.build_configurations.each do |config|
      config.build_settings[deployment_target_key] = minimum_deployment_target
      # DT_TOOLCHAIN_DIR fix for Xcode 15
      # https://stackoverflow.com/a/77142190
      xcconfig_path = config.base_configuration_reference.real_path
      xcconfig = File.read(xcconfig_path)
      xcconfig_mod = xcconfig.gsub(/DT_TOOLCHAIN_DIR/, "TOOLCHAIN_DIR")
      File.open(xcconfig_path, "w") { |file| file << xcconfig_mod }
    end
  end
end