Bugfix: Windows compatibility issue with 'cp' command not found when running pnpm start. (#25670) (#25672)

Co-authored-by: crazywoola <100913391+crazywoola@users.noreply.github.com>

web/scripts/copy-and-start.mjs

@@ -0,0 +1,115 @@
+#!/usr/bin/env node
+/**
+ * This script copies static files to the target directory and starts the server.
+ * It is intended to be used as a replacement for `next start`.
+ */
+
+import { cp, mkdir, stat } from 'node:fs/promises'
+import { spawn } from 'node:child_process'
+import path from 'node:path'
+
+// Configuration for directories to copy
+const DIRS_TO_COPY = [
+  {
+    src: path.join('.next', 'static'),
+    dest: path.join('.next', 'standalone', '.next', 'static'),
+  },
+  {
+    src: 'public',
+    dest: path.join('.next', 'standalone', 'public'),
+  },
+]
+
+// Path to the server script
+const SERVER_SCRIPT_PATH = path.join('.next', 'standalone', 'server.js')
+
+// Function to check if a path exists
+const pathExists = async (path) => {
+  try {
+    console.debug(`Checking if path exists: ${path}`)
+    await stat(path)
+    console.debug(`Path exists: ${path}`)
+    return true
+  }
+  catch (err) {
+    if (err.code === 'ENOENT') {
+      console.warn(`Path does not exist: ${path}`)
+      return false
+    }
+    throw err
+  }
+}
+
+// Function to recursively copy directories
+const copyDir = async (src, dest) => {
+  console.debug(`Copying directory from ${src} to ${dest}`)
+  await cp(src, dest, { recursive: true })
+  console.info(`Successfully copied ${src} to ${dest}`)
+}
+
+// Process each directory copy operation
+const copyAllDirs = async () => {
+  console.debug('Starting directory copy operations')
+  for (const { src, dest } of DIRS_TO_COPY) {
+    try {
+      // Instead of pre-creating destination directory, we ensure parent directory exists
+      const destParent = path.dirname(dest)
+      console.debug(`Ensuring destination parent directory exists: ${destParent}`)
+      await mkdir(destParent, { recursive: true })
+      if (await pathExists(src)) {
+        await copyDir(src, dest)
+      }
+      else {
+        console.error(`Error: ${src} directory does not exist. This is a required build artifact.`)
+        process.exit(1)
+      }
+    }
+    catch (err) {
+      console.error(`Error processing ${src}:`, err.message)
+      process.exit(1)
+    }
+  }
+  console.debug('Finished directory copy operations')
+}
+
+// Run copy operations and start server
+const main = async () => {
+  console.debug('Starting copy-and-start script')
+  await copyAllDirs()
+
+  // Start server
+  const port = process.env.npm_config_port || process.env.PORT || '3000'
+  const host = process.env.npm_config_host || process.env.HOSTNAME || '0.0.0.0'
+
+  console.info(`Starting server on ${host}:${port}`)
+  console.debug(`Server script path: ${SERVER_SCRIPT_PATH}`)
+  console.debug(`Environment variables - PORT: ${port}, HOSTNAME: ${host}`)
+
+  const server = spawn(
+    process.execPath,
+    [SERVER_SCRIPT_PATH],
+    {
+      env: {
+        ...process.env,
+        PORT: port,
+        HOSTNAME: host,
+      },
+      stdio: 'inherit',
+    },
+  )
+
+  server.on('error', (err) => {
+    console.error('Failed to start server:', err)
+    process.exit(1)
+  })
+
+  server.on('exit', (code) => {
+    console.debug(`Server exited with code: ${code}`)
+    process.exit(code || 0)
+  })
+}
+
+main().catch((err) => {
+  console.error('Unexpected error:', err)
+  process.exit(1)
+})