fix: cleanup .extractinator dir if it's unused

.changeset/lucky-mayflies-help.md

@@ -0,0 +1,5 @@
+---
+'extractinator': patch
+---
+
+fix: cleanup .extractinator dir if it's unused

src/emit.ts

@@ -1,6 +1,7 @@
 import { extname, relative, resolve } from 'node:path'
 import { rm, mkdir } from 'node:fs/promises'
 import { createRequire } from 'node:module'
+import { get_temp_dir } from './utils/temp'
 import { DEBUG_MODE } from './utils/env'
 import { b, d, l } from './utils/log'
 import { emitDts } from 'svelte2tsx'
@@ -11,14 +12,10 @@ const require = createRequire(import.meta.url)
 
 export async function emit_dts(input: string) {
 	//? Generate a unique TEMP_DIR for this instance of extractinator.
-	const TEMP_DIR = resolve(`.extractinator/dts-${Date.now()}`)
+	const TEMP_DIR = await get_temp_dir(`dts-${Date.now()}`)
 
 	l(d(`Writing ${b('dts')} files to "${b(TEMP_DIR)}"\n`))
 
-	//? [re]create the TEMP_DIR.
-	await rm(TEMP_DIR, { force: true, recursive: true })
-	await mkdir(TEMP_DIR, { recursive: true })
-
 	//? Use svelte2tsx to generate the dts files for Svelte/TS/JS.
 	await emitDts({
 		svelteShimsPath: require.resolve('svelte2tsx/svelte-shims-v4.d.ts'),
@@ -66,7 +63,7 @@ export async function emit_dts(input: string) {
 
 	return {
 		dts_file_map,
-		async cleanup() {
+		async cleanup_dts() {
 			if (DEBUG_MODE) return
 			await rm(TEMP_DIR, { recursive: true })
 		},

src/extractinator.ts

@@ -6,14 +6,15 @@ import { l, b, n, o, g, r, d, bd } from './utils/log'
 import { parseSvelteFile } from './files/svelte'
 import { parseTSFile } from './files/typescript'
 import { createTSDocParser } from './comments'
+import { clean_temp } from './utils/temp'
 import { Project } from 'ts-morph'
 import { emit_dts } from './emit'
 
 export async function extractinator(options: ExtractinatorOptions) {
 	//? ts-morph project
 	const project = new Project()
 
-	const { dts_file_map, cleanup } = await emit_dts(options.input)
+	const { dts_file_map, cleanup_dts } = await emit_dts(options.input)
 
 	//? Load all the generated .d.ts files
 	for (const dts_path of dts_file_map.keys()) {
@@ -92,7 +93,8 @@ export async function extractinator(options: ExtractinatorOptions) {
 	}
 
 	l(d('cleaning up...'))
-	await cleanup()
+	await cleanup_dts()
+	await clean_temp()
 
 	n(2)
 	l(bd('    Summary    '))

src/utils/temp.ts

@@ -0,0 +1,25 @@
+import { rm, mkdir, readdir } from 'node:fs/promises'
+import { resolve } from 'path'
+
+/**
+ * Create a temporary directory under ".extractinator" with the given name.
+ * @returns The absolute path to the temp dir.
+ */
+export async function get_temp_dir(name: string) {
+	const path = resolve(`.extractinator/${name}`)
+
+	//? Cleanup the temp dir
+	await rm(path, { force: true, recursive: true })
+	await mkdir(path, { recursive: true })
+
+	return path
+}
+
+export async function clean_temp() {
+	const TEMP_ROOT = resolve('.extractinator')
+
+	//? Remove the .extractinator dir if it's empty.
+	if ((await readdir(TEMP_ROOT)).length == 0) {
+		await rm(TEMP_ROOT, { recursive: true })
+	}
+}