1 files changed, 83 insertions, 0 deletions
diff --git a/rubocop/check_graceful_task.rb b/rubocop/check_graceful_task.rb
new file mode 100644
index 00000000000..7ae74e79e38
--- /dev/null
+++ b/rubocop/check_graceful_task.rb
@@ -0,0 +1,83 @@
+# frozen_string_literal: true
+
+require_relative 'formatter/graceful_formatter'
+require_relative '../lib/gitlab/popen'
+
+module RuboCop
+  class CheckGracefulTask
+    def initialize(output)
+      @output = output
+    end
+
+    def run(args)
+      options = %w[
+        --parallel
+        --format RuboCop::Formatter::GracefulFormatter
+      ]
+
+      available_cops = RuboCop::Cop::Registry.global.to_h
+
+      cop_names, paths = args.partition { available_cops.key?(_1) }
+
+      if cop_names.any?
+        list = cop_names.sort.join(',')
+        options.concat ['--only', list]
+      end
+
+      options.concat(paths)
+
+      puts <<~MSG
+        Running RuboCop in graceful mode:
+          rubocop #{options.join(' ')}
+
+        This might take a while...
+      MSG
+
+      status_orig = RuboCop::CLI.new.run(options)
+      status = RuboCop::Formatter::GracefulFormatter.adjusted_exit_status(status_orig)
+
+      # We had to adjust the status which means we have silenced offenses. Notify Slack!
+      notify_slack unless status_orig == status
+
+      status
+    end
+
+    private
+
+    def env_values(*keys)
+      env = ENV.slice(*keys)
+
+      missing_keys = keys - env.keys
+
+      if missing_keys.any?
+        puts "Missing ENV keys: #{missing_keys.join(', ')}"
+        return
+      end
+
+      env.values
+    end
+
+    def notify_slack
+      job_name, job_url, _ = env_values('CI_JOB_NAME', 'CI_JOB_URL', 'CI_SLACK_WEBHOOK_URL')
+
+      unless job_name
+        puts 'Skipping Slack notification.'
+        return
+      end
+
+      channel = 'f_rubocop'
+      message = ":warning: `#{job_name}` passed :green: but contained silenced offenses. See #{job_url}"
+      emoji = 'rubocop'
+      user_name = 'GitLab Bot'
+
+      puts "Notifying Slack ##{channel}."
+
+      _output, result = Gitlab::Popen.popen(['scripts/slack', channel, message, emoji, user_name])
+      puts "Failed to notify Slack channel ##{channel}." if result.nonzero?
+    end
+
+    def puts(...)
+      @output.puts(...)
+    end
+  end
+end