From fae09a7c4a9546da2c20b34f44d07d24b86d0773 Mon Sep 17 00:00:00 2001
From: kwangure <kaf.wangure@gmail.com>
Date: Wed, 9 Aug 2023 15:21:49 +0300
Subject: [PATCH] feat: delay emptying dist folder in `svelte-package`

---
 packages/package/src/index.js   | 20 +++++++++++++++-----
 packages/package/src/types.d.ts |  1 +
 2 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/packages/package/src/index.js b/packages/package/src/index.js
index fb8690934f7a..8e1398577247 100644
--- a/packages/package/src/index.js
+++ b/packages/package/src/index.js
@@ -22,25 +22,29 @@ export async function build(options) {
  * @param {(name: string, code: string) => void} analyse_code
  */
 async function do_build(options, analyse_code) {
-	const { input, output, extensions, alias } = normalize_options(options);
+	const { input, output, temp, extensions, alias } = normalize_options(options);
 
 	if (!fs.existsSync(input)) {
 		throw new Error(`${path.relative('.', input)} does not exist`);
 	}
 
-	rimraf(output);
-	mkdirp(output);
+	rimraf(temp);
+	mkdirp(temp);
 
 	const files = scan(input, extensions);
 
 	if (options.types) {
-		await emit_dts(input, output, options.cwd, alias, files);
+		await emit_dts(input, temp, options.cwd, alias, files);
 	}
 
 	for (const file of files) {
-		await process_file(input, output, file, options.config.preprocess, alias, analyse_code);
+		await process_file(input, temp, file, options.config.preprocess, alias, analyse_code);
 	}
 
+	rimraf(output);
+	mkdirp(output);
+	copy(temp, output);
+
 	console.log(
 		colors
 			.bold()
@@ -145,6 +149,11 @@ export async function watch(options) {
 function normalize_options(options) {
 	const input = path.resolve(options.cwd, options.input);
 	const output = path.resolve(options.cwd, options.output);
+	const temp = path.resolve(
+		options.cwd,
+		options.config.kit?.outDir ?? '.svelte-kit',
+		'__package__'
+	);
 	const extensions = options.config.extensions ?? ['.svelte'];
 
 	const alias = {
@@ -155,6 +164,7 @@ function normalize_options(options) {
 	return {
 		input,
 		output,
+		temp,
 		extensions,
 		alias
 	};
diff --git a/packages/package/src/types.d.ts b/packages/package/src/types.d.ts
index 3e481ed2bef9..6724137d8d1d 100644
--- a/packages/package/src/types.d.ts
+++ b/packages/package/src/types.d.ts
@@ -12,6 +12,7 @@ export interface Options {
 			files?: {
 				lib?: string;
 			};
+			outDir?: string;
 		};
 		preprocess?: PreprocessorGroup;
 	};