Made "github:webhook" action idempotent

Signed-off-by: Bogdan Nechyporenko <bnechyporenko@bol.com>

.changeset/pretty-bobcats-design.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-scaffolder-backend-module-github': patch
+---
+
+Made "github:webhook" action idempotent

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

@@ -168,18 +168,25 @@ export function createGithubWebhookAction(options: {
 
       try {
         const insecure_ssl = insecureSsl ? '1' : '0';
-        await client.rest.repos.createWebhook({
-          owner,
-          repo,
-          config: {
-            url: webhookUrl,
-            content_type: contentType,
-            secret: webhookSecret,
-            insecure_ssl,
+
+        await ctx.checkpoint({
+          key: `create.webhhook.${owner}.${repo}.${webhookUrl}`,
+          fn: async () => {
+            await client.rest.repos.createWebhook({
+              owner,
+              repo,
+              config: {
+                url: webhookUrl,
+                content_type: contentType,
+                secret: webhookSecret,
+                insecure_ssl,
+              },
+              events,
+              active,
+            });
           },
-          events,
-          active,
         });
+
         ctx.logger.info(`Webhook '${webhookUrl}' created successfully`);
       } catch (e) {
         assertError(e);