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path: root/config/initializers/direct_upload_support.rb
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# frozen_string_literal: true

class DirectUploadsValidator
  SUPPORTED_DIRECT_UPLOAD_PROVIDERS = [ObjectStorage::Config::GOOGLE_PROVIDER,
                                       ObjectStorage::Config::AWS_PROVIDER,
                                       ObjectStorage::Config::AZURE_PROVIDER].freeze

  ValidationError = Class.new(StandardError)

  def verify!(uploader_type, object_store)
    return unless object_store.enabled
    return unless object_store.direct_upload

    raise ValidationError, "Object storage is configured for '#{uploader_type}', but the 'connection' section is missing" unless object_store.key?('connection')

    provider = object_store.connection&.provider.to_s

    raise ValidationError, "No provider configured for '#{uploader_type}'. #{supported_provider_text}" if provider.blank?

    return if provider_loaded?(provider)

    raise ValidationError, "Object storage provider '#{provider}' is not supported " \
                           "when 'direct_upload' is used for '#{uploader_type}'. #{supported_provider_text}"
  end

  private

  def provider_loaded?(provider)
    return false unless SUPPORTED_DIRECT_UPLOAD_PROVIDERS.include?(provider)

    require 'fog/azurerm' if provider == ObjectStorage::Config::AZURE_PROVIDER

    true
  end

  def supported_provider_text
    "Only #{SUPPORTED_DIRECT_UPLOAD_PROVIDERS.to_sentence} are supported."
  end
end

DirectUploadsValidator.new.tap do |validator|
  CONFIGS = {
    artifacts: Gitlab.config.artifacts,
    lfs: Gitlab.config.lfs,
    uploads: Gitlab.config.uploads
  }.freeze

  CONFIGS.each do |uploader_type, uploader|
    validator.verify!(uploader_type, uploader.object_store)
  end
end