fix: Avoid crash if run without config directory (#137)

Co-authored-by: Lukas Jost <[email protected]>

.gitignore

@@ -1,5 +1,6 @@
 .idea
 .fleet
+.vscode
 node_modules/
 .DS_Store
 npm-debug.log*

src/config.ts

@@ -104,7 +104,18 @@ export const defaultConfig: Config = Object.freeze({
 })
 
 export async function readConfigDirectory (directory: string): Promise<Config> {
-  const entries = await fs.promises.readdir(directory, { withFileTypes: true })
+  let entries: fs.Dirent[]
+  try {
+    entries = await fs.promises.readdir(directory, { withFileTypes: true })
+  } catch (err: unknown) {
+    if (typeof err === 'object' && err != null && 'code' in err && err.code === 'ENOENT') {
+      // ignore missing config directory
+      entries = []
+    } else {
+      throw err
+    }
+  }
+
   const configFiles = entries.filter((entry) => entry.isFile() && entry.name.endsWith('.yaml'))
 
   // sort by name, so that 01-foo.yaml is read before 02-bar.yaml

test/config.test.ts

@@ -1,7 +1,14 @@
-import { createConfig } from '../src/config.js'
+import { createConfig, defaultConfig, readConfigDirectory } from '../src/config.js'
 import assert from 'node:assert'
 
 describe('config.ts', () => {
+  describe('readConfigDirectory()', () => {
+    it('returns the default config if the directory is missing', async () => {
+      const config = await readConfigDirectory('missing-dir')
+      assert.deepStrictEqual(config, defaultConfig)
+    })
+  })
+
   describe('createConfig()', () => {
     it('creates a valid config object', () => {
       assert.doesNotThrow(() => createConfig())