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cli.js
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// Separated out for easier unit testing module.exports = async process => { // set it here so that regardless of what happens later, we don't // leak any private CLI configs to other programs process.title = 'npm' // We used to differentiate between known broken and unsupported // versions of node and attempt to only log unsupported but still run. // After we dropped node 10 support, we can use new features // (like static, private, etc) which will only give vague syntax errors, // so now both broken and unsupported use console, but only broken // will process.exit. It is important to now perform *both* of these // checks as early as possible so the user gets the error message. const semver = require('semver') const supported = require('../package.json').engines.node const knownBroken = '<12.5.0' const nodejsVersion = process.version.replace(/-.*$/, '') /* eslint-disable no-console */ if (semver.satisfies(nodejsVersion, knownBroken)) { console.error('ERROR: npm is known not to run on Node.js ' + process.version) console.error("You'll need to upgrade to a newer Node.js version in order to use this") console.error('version of npm. You can find the latest version at https://nodejs.org/') process.exit(1) } if (!semver.satisfies(nodejsVersion, supported)) { console.error('npm does not support Node.js ' + process.version) console.error('You should probably upgrade to a newer version of node as we') console.error("can't make any promises that npm will work with this version.") console.error('You can find the latest version at https://nodejs.org/') } /* eslint-enable no-console */ const exitHandler = require('./utils/exit-handler.js') process.on('uncaughtException', exitHandler) process.on('unhandledRejection', exitHandler) const Npm = require('./npm.js') const npm = new Npm() exitHandler.setNpm(npm) // if npm is called as "npmg" or "npm_g", then // run in global mode. if (process.argv[1][process.argv[1].length - 1] === 'g') { process.argv.splice(1, 1, 'npm', '-g') } const log = require('./utils/log-shim.js') // only log node and npm paths in argv initially since argv can contain // sensitive info. a cleaned version will be logged later log.verbose('cli', process.argv.slice(0, 2).join(' ')) log.info('using', 'npm@%s', npm.version) log.info('using', 'node@%s', process.version) let cmd // now actually fire up npm and run the command. // this is how to use npm programmatically: try { await npm.load() if (npm.config.get('version', 'cli')) { npm.output(npm.version) return exitHandler() } // npm --versions=cli if (npm.config.get('versions', 'cli')) { npm.argv = ['version'] npm.config.set('usage', false, 'cli') } cmd = npm.argv.shift() if (!cmd) { npm.output(await npm.usage) process.exitCode = 1 return exitHandler() } await npm.exec(cmd, npm.argv) return exitHandler() } catch (err) { if (err.code === 'EUNKNOWNCOMMAND') { const didYouMean = require('./utils/did-you-mean.js') const suggestions = await didYouMean(npm, npm.localPrefix, cmd) npm.output(`Unknown command: "${cmd}"${suggestions}\n`) npm.output('To see a list of supported npm commands, run:\n npm help') process.exitCode = 1 return exitHandler() } return exitHandler(err) } }