From 4ebc9fd277fad6f14ada6d2570d2cdbf017778e6 Mon Sep 17 00:00:00 2001
From: Vincenzo Scamporlino <me@vinzscam.dev>
Date: Wed, 20 Oct 2021 14:12:02 +0200
Subject: [PATCH] Create .backstage-version file

Signed-off-by: Vincenzo Scamporlino <me@vinzscam.dev>
---
 .changeset/healthy-kids-mate.md      | 7 +++++++
 packages/create-app/src/createApp.ts | 6 +++---
 packages/create-app/src/index.ts     | 2 +-
 packages/create-app/src/lib/tasks.ts | 7 ++++++-
 4 files changed, 17 insertions(+), 5 deletions(-)
 create mode 100644 .changeset/healthy-kids-mate.md

diff --git a/.changeset/healthy-kids-mate.md b/.changeset/healthy-kids-mate.md
new file mode 100644
index 0000000000..b9acfc24b0
--- /dev/null
+++ b/.changeset/healthy-kids-mate.md
@@ -0,0 +1,7 @@
+---
+'@backstage/create-app': patch
+---
+
+Add .bsversion file
+
+`@backstage/create-app` will create a new `.bsversion` file containing the version of `@backstage/create-app` that has been used for creating the application.
diff --git a/packages/create-app/src/createApp.ts b/packages/create-app/src/createApp.ts
index 8823e6c858..d301792380 100644
--- a/packages/create-app/src/createApp.ts
+++ b/packages/create-app/src/createApp.ts
@@ -30,7 +30,7 @@ import {
   templatingTask,
 } from './lib/tasks';
 
-export default async (cmd: Command): Promise<void> => {
+export default async (cmd: Command, version: string): Promise<void> => {
   /* eslint-disable-next-line no-restricted-syntax */
   const paths = findPaths(__dirname);
 
@@ -82,7 +82,7 @@ export default async (cmd: Command): Promise<void> => {
       await checkPathExistsTask(appDir);
 
       Task.section('Preparing files');
-      await templatingTask(templateDir, cmd.path, answers);
+      await templatingTask(templateDir, cmd.path, answers, version);
     } else {
       // Template to temporary location, and then move files
 
@@ -93,7 +93,7 @@ export default async (cmd: Command): Promise<void> => {
       await createTemporaryAppFolderTask(tempDir);
 
       Task.section('Preparing files');
-      await templatingTask(templateDir, tempDir, answers);
+      await templatingTask(templateDir, tempDir, answers, version);
 
       Task.section('Moving to final location');
       await moveAppTask(tempDir, appDir, answers.name);
diff --git a/packages/create-app/src/index.ts b/packages/create-app/src/index.ts
index 1f37be56d2..8a2da2fad8 100644
--- a/packages/create-app/src/index.ts
+++ b/packages/create-app/src/index.ts
@@ -38,7 +38,7 @@ const main = (argv: string[]) => {
       '--skip-install',
       'Skip the install and builds steps after creating the app',
     )
-    .action(createApp);
+    .action(cmd => createApp(cmd, version));
 
   program.parse(argv);
 };
diff --git a/packages/create-app/src/lib/tasks.ts b/packages/create-app/src/lib/tasks.ts
index 0b3ca63728..aefff2c9ee 100644
--- a/packages/create-app/src/lib/tasks.ts
+++ b/packages/create-app/src/lib/tasks.ts
@@ -19,7 +19,7 @@ import fs from 'fs-extra';
 import handlebars from 'handlebars';
 import ora from 'ora';
 import recursive from 'recursive-readdir';
-import { basename, dirname, resolve as resolvePath } from 'path';
+import { basename, dirname, join, resolve as resolvePath } from 'path';
 import { exec as execCb } from 'child_process';
 import { packageVersions } from './versions';
 import { promisify } from 'util';
@@ -79,6 +79,7 @@ export async function templatingTask(
   templateDir: string,
   destinationDir: string,
   context: any,
+  version: string,
 ) {
   const files = await recursive(templateDir).catch(error => {
     throw new Error(`Failed to read template directory: ${error.message}`);
@@ -125,6 +126,10 @@ export async function templatingTask(
       });
     }
   }
+  const bsVersionFileName = '.bsversion';
+  await Task.forItem('creating', bsVersionFileName, () =>
+    fs.writeFile(join(destinationDir, bsVersionFileName), version),
+  );
 }
 
 /**