Acme.BookStore.HttpApi.Host/node_modules/yargs/lib/completion.js

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const fs = require('fs')
const path = require('path')

// add bash completions to your
//  yargs-powered applications.
module.exports = function (yargs, usage, command) {
  const self = {
    completionKey: 'get-yargs-completions'
  }

  // get a list of completion commands.
  // 'args' is the array of strings from the line to be completed
  self.getCompletion = function (args, done) {
    const completions = []
    const current = args.length ? args[args.length - 1] : ''
    const argv = yargs.parse(args, true)
    const aliases = yargs.parsed.aliases

    // a custom completion function can be provided
    // to completion().
    if (completionFunction) {
      if (completionFunction.length < 3) {
        var result = completionFunction(current, argv)

        // promise based completion function.
        if (typeof result.then === 'function') {
          return result.then(function (list) {
            process.nextTick(function () { done(list) })
          }).catch(function (err) {
            process.nextTick(function () { throw err })
          })
        }

        // synchronous completion function.
        return done(result)
      } else {
        // asynchronous completion function
        return completionFunction(current, argv, function (completions) {
          done(completions)
        })
      }
    }

    var handlers = command.getCommandHandlers()
    for (var i = 0, ii = args.length; i < ii; ++i) {
      if (handlers[args[i]] && handlers[args[i]].builder) {
        const builder = handlers[args[i]].builder
        if (typeof builder === 'function') {
          const y = yargs.reset()
          builder(y)
          return y.argv
        }
      }
    }

    if (!current.match(/^-/)) {
      usage.getCommands().forEach(function (command) {
        if (args.indexOf(command[0]) === -1) {
          completions.push(command[0])
        }