feat(config): get on array (#7917)

* refactor(config): return type annotations

* refactor: simplify configGet

* test: fix typescript errors

* feat(config): get on array

* feat(config): use comma instead

* lint: fix

.changeset/giant-ads-provide.md

@@ -0,0 +1,6 @@
+---
+"@pnpm/config": minor
+"pnpm": minor
+---
+
+`pnpm config get` now prints a comma-separated list for an array value instead of nothing.

config/plugin-commands-config/src/configGet.ts

@@ -2,5 +2,5 @@ import { type ConfigCommandOptions } from './ConfigCommandOptions'
 
 export function configGet (opts: ConfigCommandOptions, key: string): string {
   const config = opts.rawConfig[key]
-  return String(config)
+  return Array.isArray(config) ? config.join(',') : String(config)
 }

config/plugin-commands-config/test/configGet.test.ts

@@ -28,6 +28,23 @@ test('config get a boolean should return string format', async () => {
   expect(configKey).toEqual('true')
 })
 
+test('config get on array should return a comma-separated list', async () => {
+  const configKey = await config.handler({
+    dir: process.cwd(),
+    cliOptions: {},
+    configDir: process.cwd(),
+    global: true,
+    rawConfig: {
+      'public-hoist-pattern': [
+        '*eslint*',
+        '*prettier*',
+      ],
+    },
+  }, ['get', 'public-hoist-pattern'])
+
+  expect(configKey).toBe('*eslint*,*prettier*')
+})
+
 test('config get without key show list all settings ', async () => {
   const rawConfig = {
     'store-dir': '~/store',