fix: do less work loading ./lib/npm.js

Wrapping logging messages is very inacessible and makes for bad logs.
We can let terminals wrap content.

The whole cli.js file needs to parse, not just the single function
checking for compatibility, so we inline it again.

Author: wraithgar

lib/cli.js

@@ -1,41 +1,28 @@
-// This is separate to indicate that it should contain code we expect to work in
-// all conceivably runnable versions of node.  This is a best effort to catch
-// syntax errors to give users a good error message if they are using a node
-// version that doesn't allow syntax we are using such as private properties, etc
-const createEnginesValidation = () => {
-  const node = process.version.replace(/-.*$/, '')
+/* eslint-disable max-len */
+// Code in this file should work in all conceivably runnable versions of node.
+// A best effort is made to catch syntax errors to give users a good error message if they are using a node version that doesn't allow syntax we are using in other files such as private properties, etc
+
+// Separated out for easier unit testing
+module.exports = async process => {
+  // set it here so that regardless of what happens later, we don't
+  // leak any private CLI configs to other programs
+  process.title = 'npm'
+
+  // if npm is called as "npmg" or "npm_g", then run in global mode.
+  if (process.argv[1][process.argv[1].length - 1] === 'g') {
+    process.argv.splice(1, 1, 'npm', '-g')
+  }
+
+  const nodeVersion = process.version.replace(/-.*$/, '')
   const pkg = require('../package.json')
   const engines = pkg.engines.node
-  const npm = `v${pkg.version}`
-
-  const cols = Math.min(Math.max(20, process.stdout.columns) || 80, 80)
-  const wrap = (lines) => lines
-    .join(' ')
-    .split(/[ \n]+/)
-    .reduce((left, right) => {
-      const last = left.split('\n').pop()
-      const join = last.length && last.length + right.length > cols ? '\n' : ' '
-      return left + join + right
-    })
-    .trim()
-
-  const unsupportedMessage = wrap([
-    `npm ${npm} does not support Node.js ${node}.`,
-    `You should probably upgrade to a newer version of node as we can't make any`,
-    `promises that npm will work with this version.`,
-    `This version of npm supports the following node versions: \`${engines}\`.`,
-    'You can find the latest version at https://nodejs.org/.',
-  ])
-
-  const brokenMessage = wrap([
-    `ERROR: npm ${npm} is known not to run on Node.js ${node}.`,
-    `You'll need to upgrade to a newer Node.js version in order to use this version of npm.`,
-    `This version of npm supports the following node versions: \`${engines}\`.`,
-    'You can find the latest version at https://nodejs.org/.',
-  ])
-
-  // coverage ignored because this is only hit in very unsupported node versions
-  // and it's a best effort attempt to show something nice in those cases
+  const npmVersion = `v${pkg.version}`
+
+  const unsupportedMessage = `npm ${npmVersion} does not support Node.js ${nodeVersion}. This version of npm supports the following node versions: \`${engines}\`. You can find the latest version at https://nodejs.org/.`
+
+  const brokenMessage = `ERROR: npm ${npmVersion} is known not to run on Node.js ${nodeVersion}.  This version of npm supports the following node versions: \`${engines}\`. You can find the latest version at https://nodejs.org/.`
+
+  // Coverage ignored because this is only hit in very unsupported node versions and it's a best effort attempt to show something nice in those cases
   /* istanbul ignore next */
   const syntaxErrorHandler = (err) => {
     if (err instanceof SyntaxError) {
@@ -51,74 +38,42 @@ const createEnginesValidation = () => {
   process.on('uncaughtException', syntaxErrorHandler)
   process.on('unhandledRejection', syntaxErrorHandler)
 
-  return {
-    node,
-    engines,
-    unsupportedMessage,
-    off: () => {
-      process.off('uncaughtException', syntaxErrorHandler)
-      process.off('unhandledRejection', syntaxErrorHandler)
-    },
-  }
-}
-
-// 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'
-
-  // 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')
-  }
-
-  // Nothing should happen before this line if we can't guarantee it will
-  // not have syntax errors in some version of node
-  const validateEngines = createEnginesValidation()
-
   const satisfies = require('semver/functions/satisfies')
   const exitHandler = require('./utils/exit-handler.js')
   const Npm = require('./npm.js')
   const npm = new Npm()
   exitHandler.setNpm(npm)
 
-  // only log node and npm paths in argv initially since argv can contain
-  // sensitive info. a cleaned version will be logged later
+  // only log node and npm paths in argv initially since argv can contain sensitive info. a cleaned version will be logged later
   const log = require('./utils/log-shim.js')
   log.verbose('cli', process.argv.slice(0, 2).join(' '))
   log.info('using', 'npm@%s', npm.version)
   log.info('using', 'node@%s', process.version)
 
-  // At this point we've required a few files and can be pretty sure
-  // we dont contain invalid syntax for this version of node. It's
-  // possible a lazy require would, but that's unlikely enough that
-  // it's not worth catching anymore and we attach the more important
-  // exit handlers.
-  validateEngines.off()
+  // At this point we've required a few files and can be pretty sure we dont contain invalid syntax for this version of node. It's possible a lazy require would, but that's unlikely enough that it's not worth catching anymore and we attach the more important exit handlers.
+  process.off('uncaughtException', syntaxErrorHandler)
+  process.off('unhandledRejection', syntaxErrorHandler)
   process.on('uncaughtException', exitHandler)
   process.on('unhandledRejection', exitHandler)
 
-  // It is now safe to log a warning if they are using a version of node
-  // that is not going to fail on syntax errors but is still unsupported
-  // and untested and might not work reliably. This is safe to use the logger
-  // now which we want since this will show up in the error log too.
-  if (!satisfies(validateEngines.node, validateEngines.engines)) {
-    log.warn('cli', validateEngines.unsupportedMessage)
+  // It is now safe to log a warning if they are using a version of node that is not going to fail on syntax errors but is still unsupported and untested and might not work reliably. This is safe to use the logger now which we want since this will show up in the error log too.
+  if (!satisfies(nodeVersion, engines)) {
+    log.warn('cli', unsupportedMessage)
   }
 
   let cmd
-  // now actually fire up npm and run the command.
-  // this is how to use npm programmatically:
+  // Now actually fire up npm and run the command.
+  // This is how to use npm programmatically:
   try {
     await npm.load()
 
+    // npm -v
     if (npm.config.get('version', 'cli')) {
       npm.output(npm.version)
       return exitHandler()
     }
 
-    // npm --versions=cli
+    // npm --versions
     if (npm.config.get('versions', 'cli')) {
       npm.argv = ['version']
       npm.config.set('usage', false, 'cli')