Add delete label parameter

Author: YonatanKiron

README.md

@@ -187,6 +187,8 @@ Set the status message for `concourse-ci` context on specified pull request.
 
 * `label`: *Optional.* A label to add to the pull request.
 
+* `delete_label`: *Optional.* A label to remove from the pull request.
+
 ## Example pipeline
 
 Please see this repo's [pipeline](https://github.com/jtarchie/pullrequest-resource/blob/master/.concourse.yml) for a perfect example.

assets/lib/commands/out.rb

@@ -71,6 +71,17 @@ def output
         metadata << { 'name' => 'label', 'value' => params.label }
       end
 
+      if params.delete_label
+        label_exists = Octokit.labels_for_issue(input.source.repo, id).select do |hash|
+          hash.to_hash[:name] == params.delete_label
+        end
+
+        if label_exists.any?
+          Octokit.remove_label(input.source.repo, id, params.delete_label)
+        end
+        metadata << { 'name' => 'delete_label', 'value' => params.delete_label }
+      end
+
       if params.merge.method
         commit_msg = if params.merge.commit_msg
                        commit_path = File.join(destination, params.merge.commit_msg)