refactor and test for main cli script

1 files changed, 70 insertions, 0 deletions

diff --git a/lib/cli.js b/lib/cli.js
new file mode 100644
index 000000000..f76d88991
--- /dev/null
+++ b/lib/cli.js
@@ -0,0 +1,70 @@
+// Separated out for easier unit testing
+module.exports = (process) => {
+  process.title = 'npm'
+
+  const {
+    checkForBrokenNode,
+    checkForUnsupportedNode
+  } = require('../lib/utils/unsupported.js')
+
+  checkForBrokenNode()
+
+  const log = require('npmlog')
+  // pause it here so it can unpause when we've loaded the configs
+  // and know what loglevel we should be printing.
+  log.pause()
+
+  checkForUnsupportedNode()
+
+  const npm = require('../lib/npm.js')
+  const { defs: { shorthands, types } } = require('../lib/config/core.js')
+  const errorHandler = require('../lib/utils/error-handler.js')
+  const nopt = require('nopt')
+
+  // 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')
+  }
+
+  log.verbose('cli', process.argv)
+
+  const conf = nopt(types, shorthands, process.argv)
+  npm.argv = conf.argv.remain
+
+  if (conf.version) {
+    console.log(npm.version)
+    return errorHandler.exit(0)
+  }
+
+  if (conf.versions) {
+    npm.argv = ['version']
+    conf.usage = false
+  }
+
+  log.info('using', 'npm@%s', npm.version)
+  log.info('using', 'node@%s', process.version)
+
+  process.on('uncaughtException', errorHandler)
+  process.on('unhandledRejection', errorHandler)
+
+  // now actually fire up npm and run the command.
+  // this is how to use npm programmatically:
+  conf._exit = true
+  const updateNotifier = require('../lib/utils/update-notifier.js')
+  npm.load(conf, er => {
+    if (er) return errorHandler(er)
+
+    updateNotifier(npm)
+
+    const cmd = npm.argv.shift()
+    const impl = npm.commands[cmd]
+    if (impl) {
+      impl(npm.argv, errorHandler)
+    } else {
+      npm.config.set('usage', false)
+      npm.argv.unshift(cmd)
+      npm.commands.help(npm.argv, errorHandler)
+    }
+  })
+}