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import resolveFrom from 'resolve-from'
import importFrom from 'import-from'
import * as path from 'path'
import decache from './decache'

export default function resolveConfig({ cwd, config }) {
  const tailwindBase = path.dirname(
    resolveFrom(cwd, 'tailwindcss/package.json')
  )
  let resolve = (x) => x

  if (typeof config === 'string') {
    if (!cwd) {
      cwd = path.dirname(config)
    }
    decache(config)
    config = __non_webpack_require__(config)
  }

  try {
    resolve = importFrom(tailwindBase, './resolveConfig.js')
  } catch (_) {
    try {
      const resolveConfig = importFrom(
        tailwindBase,
        './lib/util/resolveConfig.js'
      )
      const defaultConfig = importFrom(
        tailwindBase,
        './stubs/defaultConfig.stub.js'
      )
      resolve = (config) => resolveConfig([config, defaultConfig])
    } catch (_) {}
  }

  return resolve(config)
}