prune.js

const Arborist = require('../')

const options = require('./lib/options.js')
const print = require('./lib/print-tree.js')
require('./lib/logging.js')
require('./lib/timers.js')

const printDiff = diff => {
  const { depth } = require('treeverse')
  depth({
    tree: diff,
    visit: d => {
      if (d.location === '') {
        return
      }
      switch (d.action) {
        case 'REMOVE':
          console.error('REMOVE', d.actual.location)
          break
        case 'ADD':
          console.error('ADD', d.ideal.location, d.ideal.resolved)
          break
        case 'CHANGE':
          console.error('CHANGE', d.actual.location, {
            from: d.actual.resolved,
            to: d.ideal.resolved,
          })
          break
      }
    },
    getChildren: d => d.children,
  })
}

const start = process.hrtime()
process.emit('time', 'install')
const arb = new Arborist(options)
arb.prune(options).then(tree => {
  process.emit('timeEnd', 'install')
  const end = process.hrtime(start)
  print(tree)
  if (options.dryRun) {
    printDiff(arb.diff)
  }
  console.error(`resolved ${tree.inventory.size} deps in ${end[0] + end[1] / 1e9}s`)
  if (tree.meta && options.save) {
    tree.meta.save()
  }
}).catch(er => console.error(require('util').inspect(er, { depth: Infinity })))