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)) /* eslint-disable-next-line max-len */ .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