app/services/create_release_service.rb


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require_relative 'base_service'

class CreateReleaseService < BaseService
  def execute(tag_name, release_description)

    repository = project.repository
    existing_tag = repository.find_tag(tag_name)

    # Only create a release if the tag exists
    if existing_tag
      release = project.releases.find_by(tag: tag_name)

      if(release)
        error('Release already exists', 409)
      else
        release = project.releases.new({ tag: tag_name, description: release_description })
        release.save

        success(release)
      end
    else
      error('Tag does not exist', 404)
    end
  end

  def success(release)
    out = super()
    out[:release] = release
    out
  end
end