gitlab-org--gitlab-foss/danger/prettier/Dangerfile

# frozen_string_literal: true

def get_prettier_files(files)
  files.select do |file|
    file.end_with?('.js', '.scss', '.vue')
  end
end

prettier_candidates = get_prettier_files(helper.all_changed_files)

return if prettier_candidates.empty?

unpretty = `node_modules/prettier/bin-prettier.js --list-different #{prettier_candidates.join(" ")}`
             .split(/$/)
             .map(&:strip)
             .reject(&:empty?)

return if unpretty.empty?

warn 'This merge request changed frontend files without pretty printing them.'

if helper.ci?
  markdown(<<~MARKDOWN)
    ## Pretty print Frontend files

    The following files should have been pretty printed with `prettier`:

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

    Please run

    ```
    node_modules/.bin/prettier --write \\
    #{unpretty.map { |path| "  '#{path}'" }.join(" \\\n")}
    ```

    Also consider auto-formatting [on-save].

    [on-save]: https://docs.gitlab.com/ee/development/fe_guide/tooling.html#formatting-with-prettier
  MARKDOWN
end