next-build.ts

#!/usr/bin/env node
import { existsSync } from 'fs'
import arg from 'next/dist/compiled/arg/index.js'
import * as Log from '../build/output/log'
import { cliCommand } from '../lib/commands'
import build from '../build'
import { printAndExit } from '../server/lib/utils'
import isError from '../lib/is-error'
import { getProjectDir } from '../lib/get-project-dir'

const nextBuild: cliCommand = (argv) => {
  const validArgs: arg.Spec = {
    // Types
    '--help': Boolean,
    '--profile': Boolean,
    '--debug': Boolean,
    '--no-lint': Boolean,
    '--no-mangling': Boolean,
    // Aliases
    '-h': '--help',
    '-d': '--debug',
  }

  let args: arg.Result<arg.Spec>
  try {
    args = arg(validArgs, { argv })
  } catch (error) {
    if (isError(error) && error.code === 'ARG_UNKNOWN_OPTION') {
      return printAndExit(error.message, 1)
    }
    throw error
  }
  if (args['--help']) {
    printAndExit(
      `
      Description
        Compiles the application for production deployment

      Usage
        $ next build <dir>

      <dir> represents the directory of the Next.js application.
      If no directory is provided, the current directory will be used.

      Options
      --profile     Can be used to enable React Production Profiling
      --no-lint     Disable linting
      --no-mangling Disable mangling
    `,
      0
    )
  }
  if (args['--profile']) {
    Log.warn('Profiling is enabled. Note: This may affect performance')
  }
  if (args['--no-lint']) {
    Log.warn('Linting is disabled')
  }
  if (args['--no-mangling']) {
    Log.warn(
      'Mangling is disabled. Note: This may affect performance and should only be used for debugging purposes'
    )
  }
  const dir = getProjectDir(args._[0])

  // Check if the provided directory exists
  if (!existsSync(dir)) {
    printAndExit(`> No such directory exists as the project root: ${dir}`)
  }

  return build(
    dir,
    null,
    args['--profile'],
    args['--debug'],
    !args['--no-lint'],
    args['--no-mangling']
  ).catch((err) => {
    console.error('')
    if (
      isError(err) &&
      (err.code === 'INVALID_RESOLVE_ALIAS' ||
        err.code === 'WEBPACK_ERRORS' ||
        err.code === 'BUILD_OPTIMIZATION_FAILED' ||
        err.code === 'EDGE_RUNTIME_UNSUPPORTED_API')
    ) {
      printAndExit(`> ${err.message}`)
    } else {
      console.error('> Build error occurred')
      printAndExit(err)
    }
  })
}

export { nextBuild }