one/src/vite/loadConfig.ts

One is a new React Framework that makes Vite serve both native and web.

import { loadConfigFromFile } from 'vite'
import '../polyfills-server'
import type { One } from './types'

// globalThis, otherwise we get issues with duplicates due to however vite calls loadConfigFromFile

export function setOneOptions(next: One.PluginOptions) {
  globalThis.__oneOptions = next
}

function getUserOneOptions() {
  if (!globalThis.__oneOptions) {
    throw new Error(`One not loaded properly, is the one() plugin in your vite.config.ts?`)
  }
  return globalThis.__oneOptions as One.PluginOptions
}

export async function loadUserOneOptions(command: 'serve' | 'build', silent = false) {
  // Suppress console output if silent
  const originalConsoleError = console.error
  if (silent) {
    console.error = () => {}
  }

  try {
    const config = await loadConfigFromFile({
      mode: command === 'serve' ? 'dev' : 'prod',
      command,
    })

    if (!config) {
      throw new Error(`No config config in ${process.cwd()}. Is this the correct directory?`)
    }

    const oneOptions = getUserOneOptions()

    if (!oneOptions) {
      throw new Error(`No One plugin config in this vite.config`)
    }

    return {
      config,
      oneOptions,
    }
  } finally {
    if (silent) {
      console.error = originalConsoleError
    }
  }
}