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did-you-mean.js1.1 KB · 34 lines
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