add dry run to githubWebhook

Signed-off-by: Tavi Nolan <Tavi.Nolan@fmr.com>

plugins/scaffolder-backend-module-github/src/actions/githubWebhook.ts

@@ -18,15 +18,16 @@ import {
   GithubCredentialsProvider,
   ScmIntegrationRegistry,
 } from '@backstage/integration';
+import { InputError, assertError } from '@backstage/errors';
 import {
   createTemplateAction,
   parseRepoUrl,
 } from '@backstage/plugin-scaffolder-node';
-import { emitterEventNames } from '@octokit/webhooks';
-import { assertError, InputError } from '@backstage/errors';
+
 import { Octokit } from 'octokit';
-import { getOctokitOptions } from './helpers';
+import { emitterEventNames } from '@octokit/webhooks';
 import { examples } from './githubWebhook.examples';
+import { getOctokitOptions } from './helpers';
 
 /**
  * Creates new action that creates a webhook for a repository on GitHub.
@@ -148,6 +149,19 @@ export function createGithubWebhookAction(options: {
         }),
       );
 
+      if (ctx.isDryRun) {
+        ctx.logger.info(
+          `Dry run arguments: ${{
+            repoUrl,
+            webhookUrl,
+            webhookSecret,
+            events,
+            ...ctx.input,
+          }}`,
+        );
+        return;
+      }
+
       try {
         const insecure_ssl = insecureSsl ? '1' : '0';
         await client.rest.repos.createWebhook({