repo_description: the package manager for JavaScript
repo_topics: javascript nodejs npm npm-cli package-manager tools
code: const Npm = require('../npm')
  const { distance } = require('fastest-levenshtein')
  const { commands } = require('./cmd-list.js')
  
  const runScripts = ['stop', 'start', 'test', 'restart']
  
  const isClose = (scmd, cmd) => distance(scmd, cmd) < scmd.length * 0.4
  
  const didYouMean = (pkg, scmd) => {
    const { scripts = {}, bin = {} } = pkg || {}
  
    const best = [
      ...commands
        .filter(cmd => isClose(scmd, cmd) && scmd !== cmd)
        .map(str => [str, Npm.cmd(str).description]),
      ...Object.keys(scripts)
        // We would already be suggesting this in `npm x` so omit them here
        .filter(cmd => isClose(scmd, cmd) && !runScripts.includes(cmd))
        .map(str => [`run ${str}`, `run the "${str}" package script`]),
      ...Object.keys(bin)
        .filter(cmd => isClose(scmd, cmd))
        .map(str => [`exec ${str}`, `run the "${str}" command from either this or a remote npm package`]),
    ]
  
    if (best.length === 0) {
      return ''
    }
  
    return `\n\nDid you mean ${best.length === 1 ? 'this' : 'one of these'}?\n` +
      best.slice(0, 3).map(([msg, comment]) => `  npm ${msg} # ${comment}`).join('\n')
  }
  
  module.exports = didYouMean
  