@xervo/cli/lib/common/help.js

The command line interface for deploying applications to the Xervo hosting platform.

var help = function (name, xervo) {
  this.name = name
  this.xervo = xervo

  this.commands = {}
  this.ordered = []
  this.pad = 0
}

help.usagePrinters = {}
help.printUsage = function (command) {
  var printer = help.usagePrinters[command]
  if (printer) {
    printer.xervo.io.print('Usage:')
    printer.print()
  }
}

help.prototype.add = function (command, print) {
  if (this.commands.hasOwnProperty(command)) {
    return
  }

  if (typeof print === 'function') {
    this.commands[command] = print.bind(this)
  } else {
    this.commands[command] = print
  }

  help.usagePrinters[command] = {
    xervo: this.xervo,
    print: this.commands[command]
  }

  this.ordered.push(command)
}

help.prototype.remove = function (command) {
  delete this.commands[command]

  for (var c = 0; c < this.ordered.length; c++) {
    if (this.ordered[c] === command) {
      this.ordered.splice(c, 1)
      return
    }
  }
}

help.prototype.line = function (text) {
  var padding = ''
  for (var p = 0; p < this.pad; p++) {
    padding += ' '
  }

  this.xervo.io.print(padding + text)
}

help.prototype.print = function () {
  this.line((this.name + ' Commands').verbose.underline)
  this.line('')

  this.pad += 2

  for (var c = 0; c < this.ordered.length; c++) {
    var output = this.commands[this.ordered[c]]

    if (typeof output === 'string') {
      this.xervo.io.print(output)
    }

    if (typeof output === 'function') {
      output()
    }

    this.line('')
  }

  this.pad -= 2
}

help.prototype.getPrinter = function () {
  return this.print.bind(this)
}

module.exports = help