Adding ability to specify the GitHub Server URL and allowing for it to differ from the Actions workflow host

src/octokit-helper.ts

@@ -0,0 +1,23 @@
+import * as github from '@actions/github'
+import {Octokit} from '@octokit/rest'
+import {getServerApiUrl} from './url-helper'
+
+// Centralize all Octokit references by re-exporting
+export {Octokit} from '@octokit/rest'
+
+export type OctokitOptions = {
+  baseUrl?: string
+  userAgent?: string
+}
+
+export function getOctokit(authToken: string, opts: OctokitOptions) {
+  const options: Octokit.Options = {
+    baseUrl: getServerApiUrl(opts.baseUrl)
+  }
+
+  if (opts.userAgent) {
+    options.userAgent = opts.userAgent
+  }
+
+  return new github.GitHub(authToken, options)
+}