Update to use Ocktokit interface for the checks API

Gemfile

@@ -2,7 +2,7 @@ source 'http://rubygems.org'
 
 gem 'sinatra', '~> 2.0'
 gem 'jwt', '~> 2.1'
-gem 'octokit', '~> 4.0'
+gem 'octokit', '~> 4.14'
 gem 'rubocop'
 gem 'dotenv'
 gem 'git'

Gemfile.lock

@@ -5,14 +5,14 @@ GEM
       public_suffix (>= 2.0.2, < 4.0)
     ast (2.4.0)
     dotenv (2.5.0)
-    faraday (0.15.3)
+    faraday (0.15.4)
       multipart-post (>= 1.2, < 3)
     git (1.5.0)
     jaro_winkler (1.5.1)
     jwt (2.1.0)
     multipart-post (2.0.0)
     mustermann (1.0.3)
-    octokit (4.13.0)
+    octokit (4.14.0)
       sawyer (~> 0.8.0, >= 0.5.3)
     parallel (1.12.1)
     parser (2.5.3.0)
@@ -50,7 +50,7 @@ DEPENDENCIES
   dotenv
   git
   jwt (~> 2.1)
-  octokit (~> 4.0)
+  octokit (~> 4.14)
   rubocop
   sinatra (~> 2.0)
 

server.rb

@@ -83,20 +83,11 @@ class GHAapp < Sinatra::Application
 
     # Create a new check run with the status queued
     def create_check_run
-      # At the time of writing, Octokit does not support the Checks API, but
-      # it does provide generic HTTP methods you can use:
-      # https://developer.github.com/v3/checks/runs/#create-a-check-run
-      check_run = @installation_client.post(
-        "repos/#{@payload['repository']['full_name']}/check-runs",
-        {
-          # This header allows for beta access to Checks API
-          accept: 'application/vnd.github.antiope-preview+json',
-          # The name of your check run.
-          name: 'Octo RuboCop',
-          # The payload structure differs depending on whether a check run or a check suite event occurred.
-          head_sha: @payload['check_run'].nil? ? @payload['check_suite']['head_sha'] : @payload['check_run']['head_sha']
-        }
-      )
+      # The name of your check run.
+      name = 'Octo RuboCop'
+      # The payload structure differs depending on whether a check run or a check suite event occurred.
+      head_sha = @payload['check_run'].nil? ? @payload['check_suite']['head_sha'] : @payload['check_run']['head_sha']
+      Octokit.create_check_run(@payload['repository']['full_name'], name, head_sha)
 
       # You requested the creation of a check run from GitHub. Now, you'll wait
       # to get confirmation from GitHub, in the form of a webhook, that it was
@@ -109,19 +100,8 @@ def initiate_check_run
       # Once the check run is created, you'll update the status of the check run
       # to 'in_progress' and run the CI process. When the CI finishes, you'll
       # update the check run status to 'completed' and add the CI results.
-
-      # At the time of writing, Octokit doesn't support the Checks API, but
-      # it does provide generic HTTP methods you can use:
-      # https://developer.github.com/v3/checks/runs/#update-a-check-run
-      updated_check_run = @installation_client.patch(
-        "repos/#{@payload['repository']['full_name']}/check-runs/#{@payload['check_run']['id']}",
-        {
-          accept: 'application/vnd.github.antiope-preview+json',
-          name: 'Octo RuboCop',
-          status: 'in_progress',
-          started_at: Time.now.utc.iso8601
-        }
-      )
+      Octokit.update_check_run(@payload['repository']['full_name'], @payload['check_run']['id'], name: 'Octo RuboCop',
+        status: 'in_progress', started_at: Time.now.utc.iso8601)
 
       # ***** RUN A CI TEST *****
       # Ideally this would be performed async, so you could return immediately.
@@ -192,8 +172,7 @@ def initiate_check_run
       text = "Octo RuboCop version: #{@output['metadata']['rubocop_version']}"
 
       # Mark the check run as complete! And if there are warnings, share them.
-      updated_check_run = @installation_client.patch(
-        "repos/#{@payload['repository']['full_name']}/check-runs/#{@payload['check_run']['id']}",
+      Octokit.update_check_run(@payload['repository']['full_name'], @payload['check_run']['id'],
         {
           accept: 'application/vnd.github.antiope-preview+json',
           name: 'Octo RuboCop',
@@ -305,7 +284,9 @@ def authenticate_app
     def authenticate_installation(payload)
       @installation_id = payload['installation']['id']
       @installation_token = @app_client.create_app_installation_access_token(@installation_id)[:token]
-      @installation_client = Octokit::Client.new(bearer_token: @installation_token)
+      Octokit.configure do |c|
+        c.bearer_token = @installation_token
+      end
     end
 
     # Check X-Hub-Signature to confirm that this webhook was generated by