Custom pronto matcher

pronto.rb

#!/usr/bin/env ruby

require 'pronto'

module Pronto
  class RegexWarnings < Runner
    # Matchers arguments: path, text, addition, first_changed_line
    def matchers
      {
        ->(path, text, addition, _) { path.match(/\.js$/) && text.include?('http:') && addition } =>
          ':thought_balloon: Is this a cross-domain request? Might want to use `https:` then.',
        ->(path, _, _, first_changed_line) { path.include?('__external_dependency') && path.include?('.approved.json') && first_changed_line } =>
          ':scroll: JSON approval for one or more external dependencies has changed have you updated them accordingly? :thinking:',
      }
    end

    def run
      paths_seen = {}

      @patches.map(&:lines).flatten.map do |line|
        path = line.patch.delta.new_file[:path]
        first_changed_line = paths_seen[path].nil?
        paths_seen[path] = true

        matchers.map do |matcher, message|
          # path, text, addition, first_changed_line
          if matcher.call(path, line.content, line.addition?, first_changed_line)
            new_message(message, line)
          end
        end
      end.flatten.compact
    end

    def new_message(message, line)
      level = :warning
      path = line.patch.delta.new_file[:path]

      if File.exist?(path)
        Message.new(path, line, level, message, nil, self.class)
      end
    end
  end
end

# Used by Pronto::Github.
if ENV['CI_PULL_REQUEST']
  ENV['PULL_REQUEST_ID'] = ENV['CI_PULL_REQUEST'].split('/').last
end
if ENV['GITHUB_BOT_TOKEN']
  ENV['PRONTO_GITHUB_ACCESS_TOKEN'] = ENV['GITHUB_BOT_TOKEN']
end

# Uncomment this for testing locally:
# Pronto.run(`git show HEAD~10 --pretty=format:%H`[0..30], '.')

if ENV['PULL_REQUEST_ID'].to_i > 0 # CircleCI sets this to 0 in master.
  Pronto.run('origin/master', '.', [Pronto::Formatter::GithubPullRequestFormatter.new])
end