feat: add helper function defineElectronConfig

Author: subframe7536

README.md

@@ -127,6 +127,35 @@ export default defineConfig(async ({ command }) => {
 })
 ```
 
+Or use the helper function
+
+```ts
+import { defineElectronConfig } from 'electron-incremental-update/vite'
+
+export default defineElectronConfig({
+  main: {
+    files: ['./electron/main/index.ts', './electron/main/worker.ts'],
+    // see https://github.com/electron-vite/electron-vite-vue/blob/85ed267c4851bf59f32888d766c0071661d4b94c/vite.config.ts#L22-L28
+    onstart: debugStartup,
+  },
+  preload: {
+    files: './electron/preload/index.ts',
+  },
+  updater: {
+    // options
+  },
+  renderer: {
+    server: process.env.VSCODE_DEBUG && (() => {
+      const url = new URL(pkg.debug.env.VITE_DEV_SERVER_URL)
+      return {
+        host: url.hostname,
+        port: +url.port,
+      }
+    })(),
+  }
+})
+```
+
 ### Modify package.json
 
 ```json

src/vite/define.ts

@@ -0,0 +1,26 @@
+import type { ElectronWithUpdaterOptions } from './option'
+import type { UserConfig, UserConfigFn } from 'vite'
+
+import { electronWithUpdater } from './core'
+
+type MakeOptional<T, K extends keyof T> = Partial<Pick<T, K>> & Omit<T, K>
+
+interface ElectronViteHelperOptions extends MakeOptional<ElectronWithUpdaterOptions, 'isBuild'> {
+  /**
+   * Config for renderer process
+   */
+  renderer?: UserConfig
+}
+
+export function defineElectronConfig(
+  options: ElectronViteHelperOptions,
+): UserConfigFn {
+  return ({ command }) => {
+    options.isBuild ??= command === 'build'
+    const electronPlugin = electronWithUpdater(options as ElectronWithUpdaterOptions)
+    const result = options.renderer ?? {}
+    result.plugins ??= []
+    result.plugins.push(electronPlugin)
+    return result
+  }
+}