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| /**
* @module libs/sys/cli
* @createdAt 2016-07-15
*
* @copyright Copyright (c) 2016 Zhonglei Qiu
* @license Licensed under the MIT license.
*/
var format = require('../sys/clog').format
var table = require('./table')
var assign = require('../lang/assign')
var isPlainObject = require('../lang/isPlainObject')
var reOptionType = /^(bool|str|num|arr|count|bstr|bnum)[a-z]*$/
var reOption = /^\s*<(bool|str|num|arr|count|bstr|bnum)[a-z]*>\s*([\s\S]*?)(?:\{\{(.*)\}\})?$/
var undef = void 0
var DEFAULT_GROUP_NAME = '__default__:)'
var typeConfig = {
bool: {
label: 'boolean',
needArgs: 0,
needArgsWhenUseEqual: 1
},
str: {
label: 'string',
needArgs: 1
},
bstr: {
label: 'boolean/string',
needArgs: 1,
boolean: true
},
num: {
label: 'number',
needArgs: 1
},
bnum: {
label: 'boolean/number',
needArgs: 1,
boolean: true
},
arr: {
label: 'array',
needArgs: 1
},
count: {
label: 'count',
needArgs: 0
}
}
/**
* @class
* @param {Object} conf cli 程序的配置项
* @param {String|Boolean} conf.help String: 帮助描述 Boolean: 是否启用系统默认的帮助选项
* @param {String|Boolean|(() => String} conf.version String: 版本号(默认为 0.0.0) Boolean: 是否启用系统默认的版本选项
* @param {String|(() => String} conf.usage 简短的描述
* @param {String|Array<String>|(() => String} conf.desc 命令的一些介绍
* @param {String|Array<String>|(() => String} conf.example 使用命令的一些样例
* @param {String|(() => String} conf.epilog 放在 help 结尾的一段话,一般用来声明版权,或者显示查看更多的链接
*
* @param {Boolean} conf.strict 遇到无法解析的 option 是否要报错
* @param {Boolean} conf.showHelpOnError 解析参数失败时不显示帮助信息
* @param {Boolean} conf.stopParseOnFirstNoOption 在遇到第一个非 option 参数时就停止解析(很适用于运行子程序)
*
* @example
* cli({
* usage: 'cli [options] <foo>'
* version: '1.0.0'
* })
* .options({
* 'e | escape': '<bool> escape input string {{ defaultValue }}'
* })
* .parse(function (res) {
* if (res.escape) {
* // ...
* }
* })
*
* @author Zhonglei Qiu
* @since 2.0.0
* @see optimist, minimist, yargs, nomnom, nopt, commander
*/
function Cli(conf) {
if (!(this instanceof Cli)) return new Cli(conf)
/**
* 配置信息
* @type {Object}
*/
this.conf = conf || {}
conf = this.conf
/**
* 在遇到第一个非 option 参数时就停止解析(很适用于子程序)
* @type {Boolean}
*/
this.stopParseOnFirstNoOption = !!conf.stopParseOnFirstNoOption
/**
* 出错时显示帮助信息
* @type {Boolean}
*/
this.showHelpOnError = !!conf.showHelpOnError
/**
* 严格模式,遇到无法解析的 option 是就报错
* @type {Boolean}
*/
this.strict = !!conf.strict
/**
* 解析完后剩下的给程序的参数
* @type {Array}
*/
this._ = []
/**
* 所有 commands 的配置
* @type {Object}
*/
this.mapCommands = {}
/**
* 所有 options 的配置
* @type {Object}
*/
this.mapOptions = {}
this.mapEnv = {}
/**
* 所有的选项分组名称
* @type {Array}
*/
this.groups = []
this.groupsMap = {}
/**
* 所有的环境变量分组名称
* @type {Array}
*/
this.envGroups = []
this.envGroupsMap = {}
if (conf.usage) this.usage = conf.usage
if (conf.desc) this.desc = [].concat(conf.desc)
if (conf.example) this.example = [].concat(conf.example)
if (conf.epilog) this.epilog = conf.epilog
}
/**
* 设置 Cli 程序的子命令
*
* @param {Object} opts 子命令配置
*
* opts 是 key-value 对象,支持下面几种类型的配置
* - str1:str2... => function
* - str1:str2... => {desc: '', cmd: function}
*
* @return {Cli}
*
* @example
*
* cli.commands({
* 'build:*': function (res) {
* // 匹配所有 build: 开头的子命令
* },
* 'r | run': function (res) {
* // handle
* },
* second: {
* desc: 'this is sub-command with description',
* cmd: function (res) {
* // handle
* }
* }
* })
*
*/
Cli.prototype.commands = function(opts) {
init.call(this, true, opts)
return this
}
/**
* 设置 Cli 程序支持的选项
*
* @param {String} [group] 选项可以分组,此值可以指定分组的名称,在选项非常多的情况下,
* 使用 --help 时可以看到效果
*
* @param {Object} opts 此分组下的所有选项
*
* opts 是 key-value 对象,支持下面几种类型的配置
* - str1:str2... => <type> desc
* - str1:str2... => {type: '', desc: '', defaultValue: ''}
*
* 说明:
* 1. str1 是一个 option,":" 后面的 str2 等等表示 str1 的别名
* 2. desc 表示 option 的描述
* 3. type 表示 option 的类型,支持的类型有
* * boolean bool
* * string str 不能为空
* * number num 不能为空
* * array arr 可以为空
* * count
* * boolean/number bnum
* * boolean/number bstr
*
* @return {Cli}
*
* @example
*
* cli.options({
* 'e | escape': '<boolean> enable escape',
* 'l | linefeed': {
* type: 'boolean',
* desc: 'append a system linefeed at end'
* }
* })
*
*/
Cli.prototype.options = function(group, opts, isEnv) {
if (typeof group !== 'string') {
opts = group
group = null
}
if (!opts) return
init.call(this, false, opts, group, isEnv)
return this
}
Cli.prototype.env = function(group, opts) {
return this.options(group, opts, true)
}
function init(isCommand, opts, group, isEnv) {
Object.keys(opts).forEach(function(origKey) {
var key, type, value, cmd, desc, alias, defaultValue, target, map
alias = origKey.trim().split(/\s*\|\s*/)
key = alias[0]
value = opts[origKey]
if (isCommand) {
if (typeof value === 'function') {
cmd = value
desc = ''
} else if (isPlainObject(value)) {
cmd = value.cmd
if (typeof cmd !== 'function') {
throw new Error('Command "' + origKey + '" should have a handle function.')
}
desc = value.desc || ''
if (value.conf || value.options || value.groups) {
/* istanbul ignore next */
var conf = value.conf || {}
/* istanbul ignore else */
if (!conf.desc) conf.desc = desc
var subCli = new Cli(conf)
subCli.options(value.options)
/* istanbul ignore else */
if (value.groups) {
Object.keys(value.groups).forEach(function(k) {
subCli.options(k, value.groups[k])
})
}
cmd = function(res, cli) {
subCli.parse(res._, function(subres) {
value.cmd.call(subCli, subres, subCli)
})
}
}
} else {
throw new Error('Command "' + origKey + '" is invalid')
}
target = { key: key, alias: alias, cmd: cmd, type: 'command', desc: desc }
map = this.mapCommands
} else {
if (typeof value === 'string') {
if (reOption.test(value)) {
type = RegExp.$1
desc = RegExp.$2
if (RegExp.$3) {
defaultValue = RegExp.$3
try {
defaultValue = JSON.parse(defaultValue.trim())
} catch (e) {
desc += '{{' + defaultValue + '}}'
defaultValue = undefined
}
}
} else {
throw new Error('Option "' + origKey + '" config "' + value + '" is invalid.')
}
} else if (isPlainObject(value)) {
type = value.type
desc = value.desc || ''
defaultValue = value.defaultValue
if (reOptionType.test(type)) {
type = RegExp.$1
} else {
throw new Error('Option "' + origKey + '" type is invalid.')
}
} else {
throw new Error('Option "' + origKey + '" is invalid.')
}
group = group || DEFAULT_GROUP_NAME
var groups = isEnv ? this.envGroups : this.groups
var groupsMap = isEnv ? this.envGroupsMap : this.groupsMap
map = isEnv ? this.mapEnv : this.mapOptions
target = { key: key, alias: alias, defaultValue: defaultValue, type: type, group: group, desc: desc }
if (groups.indexOf(group) < 0) {
if (group === DEFAULT_GROUP_NAME) {
groups.unshift(group)
} else {
groups.push(group)
}
groupsMap[group] = []
}
groupsMap[group].push(target)
}
alias.forEach(function(k) {
if (k in map) throw new Error((isCommand ? 'Command' : isEnv ? 'Env' : 'Option') + ' key "' + k + '" is duplicated.')
map[k] = target
})
}, this)
}
// 确保将 -h, -v 放在 default group 的最后面
function parseInit() {
var conf = this.conf
var opts = {}
if (conf.help !== false) {
opts['help | h'] = '<bool> ' + (typeof conf.help === 'string' ? conf.help : 'show help')
}
if (conf.version !== false) {
this.version = conf.version
opts['version | v'] = '<bool> ' + 'show version'
}
init.call(this, false, opts)
}
function parse(args) {
var _ = this._
var i, arg, rawArg, stopped
var ck = consumeKey.bind(this)
var cv = consumeVal.bind(this)
for (i = 0; i < args.length; i++) {
rawArg = arg = args[i]
if (stopped) {
_.push(arg)
} else if (_.length === 0 && this.getCommanderByKey(arg)) { // 运行子命令剩下的参数给子命令去解析
stopped = true
_.push(arg)
} else if (arg === '--') {
stopped = true
} else {
var equalValue = null
var equalIndex = arg.indexOf('=')
if (equalIndex >= 0) {
equalValue = arg.substr(equalIndex + 1)
arg = arg.substr(0, equalIndex)
}
if (arg.slice(0, 2) === '--') { // 长参数
if (arg.length === 3) { // --a 类的参数不是 option,需要当作 value
cv(rawArg)
} else {
ck(arg.slice(2), undefined, equalValue)
if (equalValue != null) cv(equalValue, true)
}
} else if (arg[0] === '-' && arg.length === 2) { // 单个短参数
ck(arg[1], undefined, equalValue)
if (equalValue != null) cv(equalValue, true)
} else if (arg[0] === '-' && arg.length >= 3) { // 多个短参数,或单个数字短参数
// 这里的参数被打散处理了,所以 consume 前要先 check 整体参数是否 valid
if (/^-\w(\d+)$/.test(arg)) {
if (checkOpt.call(this, arg[1], rawArg)) {
// 已经赋值,不应该再赋值
if (equalValue != null) throw new Error('Error: can not parse arg "' + rawArg + '"')
ck(arg[1])
cv(arg.slice(2))
}
} else {
arg = arg.slice(1).split('')
if (checkOpt.call(this, arg, rawArg)) {
arg.forEach(function(k, i, ref) {
if (ref.length - 1 === i) {
ck(k) // 最后一个 option 可以接任意个参数
if (equalValue != null) cv(equalValue, true)
} else {
ck(k, 'noNeedArgs') // 后面不能接参数
}
})
}
}
} else {
// 处理非 option
cv(rawArg)
}
}
if (_.length && this.stopParseOnFirstNoOption) stopped = true
}
var ct = this.consumeTarget
if (ct && !ct.boolean && ct.needArgs > ct.currentArgs && ct.needArgs !== Infinity) {
throw new Error('Error: ' + ct.type + ' option ' + this.formatOptionKey(ct.consumedKey) + ' need argument.')
}
}
function parseEnv(mapEnv) {
Object.keys(mapEnv).forEach(function(key) {
// { key: key, alias: alias, defaultValue: defaultValue, type: type, group: group, desc: desc }
var target = mapEnv[key]
if (process.env.hasOwnProperty(key)) {
var value = process.env[target.key]
switch (target.type) {
case 'str':
target.value = value
break
case 'bool':
target.value = !(!value || value === 'false' || value === 'no' || value === '0')
break
case 'num':
target.value = parseFloat(value)
break
case 'bnum':
if (value === 'false') target.value = false
else if (value === 'true') target.value = true
else target.value = parseFloat(value)
break
case 'bstr':
if (value === 'false') target.value = false
else if (value === 'true') target.value = true
else target.value = value
break
default:
throw new Error('Not supported env type "' + target.type + '"')
}
}
})
}
/**
* 解析传入的参数
*
* - 解析到 "--" 就停止解析
* - array 类型的参数支持重复设置,其它类型的参数会被覆盖,array 形式的 option 如果不加参数会返回空数组
* - 支持短标签加数字的快捷方式,如 "-n100",前提是 "-n" 需要是 number 类型
* - 其它:https://github.com/yargs/yargs#parsing-tricks
*
* @param {Array<String>} [args] 参数
* @param {Function} handle parse 完成后,如果没有被内部 handle,则会调用此 handle
* @return {Cli}
*
* @example
*
* cli.parse(process.argv.slice(2), function (res) {
* if (res.foo) {
* // do something
* }
* })
*
*/
Cli.prototype.parse = function(args, handle) {
if (!Array.isArray(args)) {
handle = args
args = process.argv.slice(2)
}
parseInit.call(this)
try {
parse.call(this, args)
} catch (e) {
/* istanbul ignore else */
if (/^Error: /.test(e.message)) {
this.error(e.message)
return this
} else {
throw e
}
}
parseEnv(this.mapEnv)
var res = this.res = {
userDefinedOptions: {}, // 记录所有的使用了用户定义的字段
userDefinedEnv: {},
env: {}
}
res.userDefined = res.userDefinedOptions // 兼容老版本
var run = function(opts, defined, assignTarget) {
Object.keys(opts).forEach(function(k) {
if ('value' in opts[k]) {
defined[k] = true
}
var value = 'value' in opts[k] ? opts[k].value : opts[k].defaultValue
if (value !== undefined) {
assignTarget[k] = value
}
})
}
run(this.mapOptions, res.userDefinedOptions, res)
run(this.mapEnv, res.userDefinedEnv, res.env)
res.rawArgs = args
var _ = this._
if (res.help) {
this.help()
} else if (res.version) {
console.log(this.version ? strOrFunToString(this.version) : '0.0.0')
} else {
var commander = this.getCommanderByKey(_[0])
if (commander) {
res.$command = _[0]
res._ = _.slice(1)
commander.cmd.call(this, res, this)
} else if (typeof handle === 'function') {
res._ = _
handle.call(this, res, this)
}
}
return this
}
Cli.prototype.getCommanderByKey = function(key) {
var commanderMap = this.mapCommands
var commander = key && commanderMap[key]
if (key && !commander) {
var newKey = Object.keys(commanderMap).find(function(k) {
if (k.includes('*')) {
return new RegExp('^' + k.replace(/\*/g, '.*') + '$').test(key)
}
return false
})
commander = newKey && commanderMap[newKey]
}
return commander
}
/**
* 格式化 option 选项
* @param {String} key 选项名
* @return {String} 带 "-" 或 "--" 的选项名
*/
Cli.prototype.formatOptionKey = function(key) {
return key.length === 1 ? '-' + key : '--' + key
}
/**
* 得到某个 option 的配置
* @param {String} key 选项名
* @return {Object} 解析过后的配置
*/
Cli.prototype.getOptionConfig = function(key) {
return this.mapOptions[key]
}
/**
* 判断某个 option 是否存在
* @param {String} key 选项名
* @return {Boolean}
*/
Cli.prototype.isOptionKeyValid = function(key) {
return key in this.mapOptions
}
/**
* 输出错误信息
*
* @param {...*} arg 参数格式和 {@link module:libs/sys/clog.format} 的格式是一致的
* @return {Cli}
*/
Cli.prototype.error = function() {
console.log(format('\n%c%s\n', 'red', format.apply(null, arguments)))
if (this.showHelpOnError) this.help()
return this
}
/**
* 根据 Cli 的配置,输出帮助信息
*/
Cli.prototype.help = function(returnStr) {
var buffer = []
var EOL = require('os').EOL
var puts = function() { buffer.push(format.apply(null, arguments)) }
var putsHeader = function(header) { puts('%c%s:\n', 'white.bold', header) }
var putsCommands = function(header, obj) {
var cache = []
var rows = []
Object.keys(obj).forEach(function(key) {
var entry = obj[key]
if (cache.indexOf(entry) >= 0) return
cache.push(entry)
var row = []
row.push(format(' %c%s ', 'green', entry.alias.join(', ')))
row.push(format('%c%s', 'default', entry.desc))
rows.push(row)
})
if (!rows.length) return
putsHeader(header)
puts(table(rows))
puts()
}
puts()
if (this.usage) {
puts('%cUsage: %c%s\n', 'white.bold', 'green', strOrFunToString(this.usage))
}
if (this.desc) {
this.desc.forEach(function(row) { puts(' %c%s', 'gray', strOrFunToString(row)) })
puts()
}
if (this.example) {
putsHeader('Example')
this.example.forEach(function(row) { puts(' %c%s', 'red.bg.white', strOrFunToString(row)) })
puts()
}
putsCommands('Commands', this.mapCommands)
var putsGroups = function(title, groups, groupsMap, isEnv) {
if (groups.length) {
var rows = []
groups.forEach(function(group) {
if (group !== DEFAULT_GROUP_NAME) {
rows.push(['', '', ''])
rows.push([format(' %c%s:', 'green.bold', group), '', ''])
rows.push(['', '', ''])
}
groupsMap[group].forEach(function(entry) {
var row = []
var defaultValue = entry.defaultValue !== undef
? format(' %c[ default: %s ]', 'gray', JSON.stringify(entry.defaultValue))
: ''
var alias = isEnv ? entry.alias : entry.alias.map(function(a) { return (a.length === 1 ? '-' : '--') + a })
row.push(format(' %c%s', 'green', alias.join(', ')))
row.push(format(' %c%s ', 'cyan', '<' + typeConfig[entry.type].label + '>'))
row.push(format('%c%s', 'default', entry.desc + defaultValue))
rows.push(row)
})
}, this)
/* istanbul ignore else */
if (rows.length) {
putsHeader(title)
puts(table(rows))
puts()
}
}
}
putsGroups('Options', this.groups, this.groupsMap)
putsGroups('Env', this.envGroups, this.envGroupsMap, true)
if (this.epilog) puts(' %s\n', strOrFunToString(this.epilog))
buffer = buffer.join(EOL)
return returnStr ? buffer : /* istanbul ignore next */ console.log(buffer)
}
function checkOpt(opts, rawArg) {
var optsArr = [].concat(opts)
if (optsArr.every(this.isOptionKeyValid.bind(this))) {
return true
} else {
invalidOpt.call(this, rawArg)
}
}
function invalidOpt(rawArg) {
if (this.strict) {
throw new Error('Error: invalid option ' + rawArg + '.')
} else {
consumeVal.call(this, rawArg)
}
}
function consumeKey(key, noNeedArgs, equalValue) {
var conf = this.getOptionConfig(key)
if (!conf) return invalidOpt.call(this, this.formatOptionKey(key))
assign(conf, typeConfig[conf.type])
conf.currentArgs = 0
if (noNeedArgs && conf.needArgs > 0) {
throw new Error('Error: ' + conf.type + ' option '
+ this.formatOptionKey(key) + ' need argument.')
}
switch (conf.type) {
case 'bool':
case 'bstr':
case 'bnum':
conf.value = true
break
case 'count':
if (equalValue != null) throw new Error('Error: "' + key + '" option do not need argument.')
if ('value' in conf) conf.value++
else conf.value = 1
break
case 'arr':
if (!conf.value) conf.value = []
break
}
this.consumeTarget = conf
conf.consumedKey = key
}
function consumeVal(val, isEqualValue) {
var conf = this.consumeTarget
var needArgs = conf ? conf.needArgs : 0
if (isEqualValue && conf && conf.needArgsWhenUseEqual) needArgs = conf.needArgsWhenUseEqual
if (!conf || needArgs === conf.currentArgs) {
this._.push(val)
} else if (needArgs > conf.currentArgs) {
var consumedKey = this.formatOptionKey(conf.consumedKey)
conf.currentArgs++
switch (conf.type) {
case 'arr':
conf.value.push(val)
break
case 'str':
case 'bstr':
if (conf.type === 'bstr' && val === 'true') conf.value = true
else if (conf.type === 'bstr' && val === 'false') conf.value = false
else conf.value = val
break
case 'bool':
conf.value = val === 'yes' || val === 'true'
break
case 'num':
case 'bnum':
if (conf.type === 'bnum' && val === 'true') conf.value = true
else if (conf.type === 'bnum' && val === 'false') conf.value = false
else conf.value = parseNumber(val)
if (isNaN(conf.value)) {
throw new Error('Error: invalid number value "'
+ val + '" for option "'
+ consumedKey + '".')
}
break
}
} else {
throw new SyntaxError('Parse error.')
}
}
function parseNumber(val, ctx) {
if (/\./.test(val)) val = parseFloat(val)
else val = parseInt(val, 10)
return val
}
function strOrFunToString(val) {
return typeof val === 'function' ? val() : val
}
module.exports = Cli
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