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Dangerfile « duplicate_yarn_dependencies « danger - gitlab.com/gitlab-org/gitlab-foss.git - Unnamed repository; edit this file 'description' to name the repository.
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# frozen_string_literal: true

return unless helper.all_changed_files.include?('yarn.lock')

duplicate = `node_modules/.bin/yarn-deduplicate --list --strategy fewer yarn.lock`
             .split(/$/)
             .map(&:strip)
             .reject(&:empty?)

return if duplicate.empty?

warn 'This merge request has introduced duplicated yarn dependencies.'

if GitlabDanger.new(helper.gitlab_helper).ci?
  markdown(<<~MARKDOWN)
    ## Duplicate yarn dependencies

    The following dependencies should be de-duplicated:

    * #{duplicate.map { |path| "`#{path}`" }.join("\n* ")}

    Please run the following command and commit the changes to `yarn.lock`:

    ```
    node_modules/.bin/yarn-deduplicate --strategy fewer yarn.lock \\
      && yarn install
    ```
  MARKDOWN
end