Include GitHub scaffolder actions

Signed-off-by: Andre Wanlin <awanlin@spotify.com>

.changeset/seven-kangaroos-sit.md

@@ -0,0 +1,5 @@
+---
+'@backstage/create-app': patch
+---
+
+Include `@backstage/plugin-scaffolder-backend-module-github` out of the box

docs/features/software-templates/builtin-actions.md

@@ -8,8 +8,46 @@ The scaffolder comes with several built-in actions for fetching content,
 registering in the catalog and of course actions for creating and publishing a
 git repository.
 
-There are several repository providers supported out of the box such as GitHub,
-Azure, GitLab and Bitbucket.
+## Action Modules
+
+The GitHub module is included out of the box, but several other modules are available:
+
+- Azure DevOps: `@backstage/plugin-scaffolder-backend-module-azure`
+- Bitbucket Cloud: `@backstage/plugin-scaffolder-backend-module-bitbucket-cloud`
+- Bitbucket Server: `@backstage/plugin-scaffolder-backend-module-bitbucket-server`
+- Gerrit: `@backstage/plugin-scaffolder-backend-module-gerrit`
+- Gittea: `@backstage/plugin-scaffolder-backend-module-gittea`
+- GitLab: `@backstage/plugin-scaffolder-backend-module-gitlab`
+
+Here's how to add an action module, this is a simplified backend for example purposes:
+
+```ts title="/packages/backend/src/index.ts
+import { createBackend } from '@backstage/backend-defaults';
+
+const backend = createBackend();
+
+backend.add(import('@backstage/plugin-app-backend/alpha'));
+
+// catalog plugin
+backend.add(import('@backstage/plugin-catalog-backend/alpha'));
+backend.add(
+  import('@backstage/plugin-catalog-backend-module-scaffolder-entity-model'),
+);
+
+// scaffolder plugin
+backend.add(import('@backstage/plugin-scaffolder-backend/alpha'));
+{
+  /* highlight-add-start */
+}
+backend.add(import('@backstage/plugin-scaffolder-backend-module-azure'));
+{
+  /* highlight-add-end */
+}
+
+backend.start();
+```
+
+## Listing Actions
 
 A list of all registered actions can be found under `/create/actions`. For local
 development you should be able to reach them at

packages/create-app/src/lib/versions.ts

@@ -74,6 +74,7 @@ import { version as pluginProxyBackend } from '../../../../plugins/proxy-backend
 import { version as pluginRollbarBackend } from '../../../../plugins/rollbar-backend/package.json';
 import { version as pluginScaffolder } from '../../../../plugins/scaffolder/package.json';
 import { version as pluginScaffolderBackend } from '../../../../plugins/scaffolder-backend/package.json';
+import { version as pluginScaffolderBackendModuleGithub } from '../../../../plugins/scaffolder-backend-module-github/package.json';
 import { version as pluginSearch } from '../../../../plugins/search/package.json';
 import { version as pluginSearchReact } from '../../../../plugins/search-react/package.json';
 import { version as pluginSearchBackend } from '../../../../plugins/search-backend/package.json';
@@ -134,6 +135,8 @@ export const packageVersions = {
   '@backstage/plugin-rollbar-backend': pluginRollbarBackend,
   '@backstage/plugin-scaffolder': pluginScaffolder,
   '@backstage/plugin-scaffolder-backend': pluginScaffolderBackend,
+  '@backstage/plugin-scaffolder-backend-module-github':
+    pluginScaffolderBackendModuleGithub,
   '@backstage/plugin-search': pluginSearch,
   '@backstage/plugin-search-react': pluginSearchReact,
   '@backstage/plugin-search-backend': pluginSearchBackend,

packages/create-app/templates/default-app/packages/backend/package.json.hbs

@@ -33,6 +33,7 @@
     "@backstage/plugin-permission-node": "^{{version '@backstage/plugin-permission-node'}}",
     "@backstage/plugin-proxy-backend": "^{{version '@backstage/plugin-proxy-backend'}}",
     "@backstage/plugin-scaffolder-backend": "^{{version '@backstage/plugin-scaffolder-backend'}}",
+    "@backstage/plugin-scaffolder-backend-module-github": "^{{version '@backstage/plugin-scaffolder-backend-module-github'}}",
     "@backstage/plugin-search-backend": "^{{version '@backstage/plugin-search-backend'}}",
     "@backstage/plugin-search-backend-module-catalog": "^{{version '@backstage/plugin-search-backend-module-catalog'}}",
     "@backstage/plugin-search-backend-module-techdocs": "^{{version '@backstage/plugin-search-backend-module-techdocs'}}",

packages/create-app/templates/default-app/packages/backend/src/index.ts

@@ -12,7 +12,6 @@ const backend = createBackend();
 
 backend.add(import('@backstage/plugin-app-backend/alpha'));
 backend.add(import('@backstage/plugin-proxy-backend/alpha'));
-backend.add(import('@backstage/plugin-scaffolder-backend/alpha'));
 backend.add(import('@backstage/plugin-techdocs-backend/alpha'));
 
 // auth plugin
@@ -33,6 +32,12 @@ backend.add(
   import('@backstage/plugin-permission-backend-module-allow-all-policy'),
 );
 
+// scaffolder plugin
+backend.add(import('@backstage/plugin-scaffolder-backend/alpha'));
+// See: https://backstage.io/docs/features/software-templates/builtin-actions#action-modules
+// If you don't use GitHub, feel free to remove this
+backend.add(import('@backstage/plugin-scaffolder-backend-module-github'));
+
 // search plugin
 backend.add(import('@backstage/plugin-search-backend/alpha'));
 backend.add(import('@backstage/plugin-search-backend-module-catalog/alpha'));