Introduce clean script

package.json

@@ -1,5 +1,6 @@
 {
     "name": "laravel-vite-plugin",
+    "type": "module",
     "version": "0.8.1",
     "description": "Laravel plugin for Vite.",
     "keywords": [
@@ -32,14 +33,16 @@
         "/inertia-helpers"
     ],
     "scripts": {
-        "build": "npm run build-plugin && npm run build-inertia-helpers",
+        "build": "npm run build-plugin && npm run build-inertia-helpers && npm run build-clean",
         "build-plugin": "rm -rf dist && npm run build-plugin-types && npm run build-plugin-esm && npm run build-plugin-cjs && cp src/dev-server-index.html dist/",
         "build-plugin-types": "tsc --emitDeclarationOnly",
         "build-plugin-cjs": "esbuild src/index.ts --platform=node --format=cjs --outfile=dist/index.cjs --define:import.meta.url=import_meta_url --inject:./import.meta.url-polyfill.js",
         "build-plugin-esm": "esbuild src/index.ts --platform=node --format=esm --outfile=dist/index.mjs",
         "build-inertia-helpers": "rm -rf inertia-helpers && tsc --project tsconfig.inertia-helpers.json",
+        "build-clean": "cp ./src/clean.js ./dist",
         "lint": "eslint --ext .ts ./src ./tests",
-        "test": "vitest run"
+        "test": "vitest run",
+        "clean-project": "node ./dist/clean.js"
     },
     "devDependencies": {
         "@types/node": "^18.11.9",

src/clean.js

@@ -0,0 +1,56 @@
+import fs from 'fs'
+
+/*
+ * Argv helpers.
+ */
+
+const argument = (name, fallback) => {
+  const index = process.argv.findIndex(argument => argument.startsWith(`--${name}=`))
+
+  return index === -1
+    ? fallback()
+    : process.argv[index].substring(`--${name}=`.length)
+}
+
+const option = (name) => process.argv.includes(`--${name}`)
+
+/*
+ * Configuration.
+ */
+
+const dryRun = option('dry-run')
+const root = argument('root', () => process.cwd())
+const manifestPath = argument('manifest-path', () => `${root}/public/build/manifest.json`)
+const assetsDirectory = argument('asset-directory', () => `${root}/public/build/assets`)
+
+/*
+ * Clean.
+ */
+
+console.log('Removing orphaned assets...')
+
+const manifest = JSON.parse(fs.readFileSync(manifestPath).toString())
+
+const manifestAssets = Object.keys(manifest).map(key => manifest[key].file)
+
+const allAssets = fs.readdirSync(assetsDirectory, { withFileTypes: true })
+
+const orphanedAssets = allAssets.filter(file => file.isFile())
+  .filter(file => manifestAssets.findIndex(asset => asset.endsWith(`/${file.name}`)) === -1)
+
+if (orphanedAssets.length === 0) {
+  console.log('There are no ophaned assets.')
+} else {
+  orphanedAssets.forEach(asset => {
+    const path = `${assetsDirectory}/${asset.name}`
+
+    console.log(`Removing ${path}`)
+
+    if (! dryRun) {
+      fs.unlinkSync(path)
+    }
+  })
+
+  console.log('Done cleaning.')
+}
+