text: const output = require('./utils/output.js')
  const usageUtil = require('./utils/usage.js')
  
  class Prefix {
    constructor (npm) {
      this.npm = npm
    }
  
    /* istanbul ignore next - see test/lib/load-all-commands.js */
    get usage () {
      return usageUtil('prefix', 'npm prefix [-g]')
    }
  
    exec (args, cb) {
      this.prefix(args).then(() => cb()).catch(cb)
    }
  
    async prefix (args) {
      return output(this.npm.prefix)
    }
  }
  module.exports = Prefix
  