chooseFile.js

const chooseFile = async ({ directory, message, matching }) => {
  let candidateFiles
  if (matching) {
    candidateFiles = await filesystem.find(directory, { matching })
  } else {
    candidateFiles = await filesystem.list(directory)
  }
  
  const promptConfig = {    
    name: 'chosenFile',
    message,
    choices: ['all', prompt.separator(), ...candidateFiles]
  }
  const { chosenFile } = await prompt.ask(promptConfig)
  
  return chosenFile
}