| [6a3a178] | 1 | 'use strict'
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| 2 | // this file handles outputting usage instructions,
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| 3 | // failures, etc. keeps logging in one place.
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| 4 | const decamelize = require('./decamelize')
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| 5 | const stringWidth = require('string-width')
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| 6 | const objFilter = require('./obj-filter')
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| 7 | const path = require('path')
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| 8 | const setBlocking = require('set-blocking')
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| 9 | const YError = require('./yerror')
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| 10 |
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| 11 | module.exports = function usage (yargs, y18n) {
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| 12 | const __ = y18n.__
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| 13 | const self = {}
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| 14 |
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| 15 | // methods for ouputting/building failure message.
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| 16 | const fails = []
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| 17 | self.failFn = function failFn (f) {
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| 18 | fails.push(f)
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| 19 | }
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| 20 |
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| 21 | let failMessage = null
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| 22 | let showHelpOnFail = true
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| 23 | self.showHelpOnFail = function showHelpOnFailFn (enabled, message) {
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| 24 | if (typeof enabled === 'string') {
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| 25 | message = enabled
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| 26 | enabled = true
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| 27 | } else if (typeof enabled === 'undefined') {
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| 28 | enabled = true
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| 29 | }
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| 30 | failMessage = message
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| 31 | showHelpOnFail = enabled
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| 32 | return self
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| 33 | }
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| 34 |
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| 35 | let failureOutput = false
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| 36 | self.fail = function fail (msg, err) {
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| 37 | const logger = yargs._getLoggerInstance()
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| 38 |
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| 39 | if (fails.length) {
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| 40 | for (let i = fails.length - 1; i >= 0; --i) {
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| 41 | fails[i](msg, err, self)
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| 42 | }
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| 43 | } else {
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| 44 | if (yargs.getExitProcess()) setBlocking(true)
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| 45 |
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| 46 | // don't output failure message more than once
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| 47 | if (!failureOutput) {
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| 48 | failureOutput = true
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| 49 | if (showHelpOnFail) {
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| 50 | yargs.showHelp('error')
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| 51 | logger.error()
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| 52 | }
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| 53 | if (msg || err) logger.error(msg || err)
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| 54 | if (failMessage) {
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| 55 | if (msg || err) logger.error('')
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| 56 | logger.error(failMessage)
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| 57 | }
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| 58 | }
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| 59 |
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| 60 | err = err || new YError(msg)
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| 61 | if (yargs.getExitProcess()) {
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| 62 | return yargs.exit(1)
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| 63 | } else if (yargs._hasParseCallback()) {
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| 64 | return yargs.exit(1, err)
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| 65 | } else {
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| 66 | throw err
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| 67 | }
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| 68 | }
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| 69 | }
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| 70 |
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| 71 | // methods for ouputting/building help (usage) message.
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| 72 | let usages = []
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| 73 | let usageDisabled = false
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| 74 | self.usage = (msg, description) => {
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| 75 | if (msg === null) {
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| 76 | usageDisabled = true
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| 77 | usages = []
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| 78 | return
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| 79 | }
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| 80 | usageDisabled = false
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| 81 | usages.push([msg, description || ''])
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| 82 | return self
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| 83 | }
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| 84 | self.getUsage = () => {
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| 85 | return usages
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| 86 | }
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| 87 | self.getUsageDisabled = () => {
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| 88 | return usageDisabled
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| 89 | }
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| 90 |
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| 91 | self.getPositionalGroupName = () => {
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| 92 | return __('Positionals:')
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| 93 | }
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| 94 |
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| 95 | let examples = []
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| 96 | self.example = (cmd, description) => {
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| 97 | examples.push([cmd, description || ''])
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| 98 | }
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| 99 |
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| 100 | let commands = []
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| 101 | self.command = function command (cmd, description, isDefault, aliases) {
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| 102 | // the last default wins, so cancel out any previously set default
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| 103 | if (isDefault) {
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| 104 | commands = commands.map((cmdArray) => {
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| 105 | cmdArray[2] = false
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| 106 | return cmdArray
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| 107 | })
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| 108 | }
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| 109 | commands.push([cmd, description || '', isDefault, aliases])
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| 110 | }
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| 111 | self.getCommands = () => commands
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| 112 |
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| 113 | let descriptions = {}
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| 114 | self.describe = function describe (key, desc) {
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| 115 | if (typeof key === 'object') {
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| 116 | Object.keys(key).forEach((k) => {
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| 117 | self.describe(k, key[k])
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| 118 | })
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| 119 | } else {
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| 120 | descriptions[key] = desc
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| 121 | }
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| 122 | }
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| 123 | self.getDescriptions = () => descriptions
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| 124 |
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| 125 | let epilog
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| 126 | self.epilog = (msg) => {
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| 127 | epilog = msg
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| 128 | }
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| 129 |
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| 130 | let wrapSet = false
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| 131 | let wrap
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| 132 | self.wrap = (cols) => {
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| 133 | wrapSet = true
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| 134 | wrap = cols
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| 135 | }
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| 136 |
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| 137 | function getWrap () {
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| 138 | if (!wrapSet) {
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| 139 | wrap = windowWidth()
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| 140 | wrapSet = true
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| 141 | }
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| 142 |
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| 143 | return wrap
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| 144 | }
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| 145 |
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| 146 | const deferY18nLookupPrefix = '__yargsString__:'
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| 147 | self.deferY18nLookup = str => deferY18nLookupPrefix + str
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| 148 |
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| 149 | const defaultGroup = 'Options:'
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| 150 | self.help = function help () {
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| 151 | normalizeAliases()
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| 152 |
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| 153 | // handle old demanded API
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| 154 | const base$0 = path.basename(yargs.$0)
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| 155 | const demandedOptions = yargs.getDemandedOptions()
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| 156 | const demandedCommands = yargs.getDemandedCommands()
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| 157 | const groups = yargs.getGroups()
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| 158 | const options = yargs.getOptions()
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| 159 |
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| 160 | let keys = []
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| 161 | keys = keys.concat(Object.keys(descriptions))
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| 162 | keys = keys.concat(Object.keys(demandedOptions))
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| 163 | keys = keys.concat(Object.keys(demandedCommands))
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| 164 | keys = keys.concat(Object.keys(options.default))
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| 165 | keys = keys.filter(filterHiddenOptions)
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| 166 | keys = Object.keys(keys.reduce((acc, key) => {
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| 167 | if (key !== '_') acc[key] = true
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| 168 | return acc
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| 169 | }, {}))
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| 170 |
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| 171 | const theWrap = getWrap()
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| 172 | const ui = require('cliui')({
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| 173 | width: theWrap,
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| 174 | wrap: !!theWrap
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| 175 | })
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| 176 |
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| 177 | // the usage string.
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| 178 | if (!usageDisabled) {
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| 179 | if (usages.length) {
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| 180 | // user-defined usage.
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| 181 | usages.forEach((usage) => {
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| 182 | ui.div(`${usage[0].replace(/\$0/g, base$0)}`)
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| 183 | if (usage[1]) {
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| 184 | ui.div({ text: `${usage[1]}`, padding: [1, 0, 0, 0] })
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| 185 | }
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| 186 | })
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| 187 | ui.div()
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| 188 | } else if (commands.length) {
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| 189 | let u = null
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| 190 | // demonstrate how commands are used.
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| 191 | if (demandedCommands._) {
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| 192 | u = `${base$0} <${__('command')}>\n`
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| 193 | } else {
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| 194 | u = `${base$0} [${__('command')}]\n`
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| 195 | }
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| 196 | ui.div(`${u}`)
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| 197 | }
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| 198 | }
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| 199 |
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| 200 | // your application's commands, i.e., non-option
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| 201 | // arguments populated in '_'.
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| 202 | if (commands.length) {
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| 203 | ui.div(__('Commands:'))
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| 204 |
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| 205 | const context = yargs.getContext()
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| 206 | const parentCommands = context.commands.length ? `${context.commands.join(' ')} ` : ''
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| 207 |
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| 208 | if (yargs.getParserConfiguration()['sort-commands'] === true) {
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| 209 | commands = commands.sort((a, b) => a[0].localeCompare(b[0]))
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| 210 | }
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| 211 |
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| 212 | commands.forEach((command) => {
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| 213 | const commandString = `${base$0} ${parentCommands}${command[0].replace(/^\$0 ?/, '')}` // drop $0 from default commands.
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| 214 | ui.span(
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| 215 | {
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| 216 | text: commandString,
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| 217 | padding: [0, 2, 0, 2],
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| 218 | width: maxWidth(commands, theWrap, `${base$0}${parentCommands}`) + 4
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| 219 | },
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| 220 | { text: command[1] }
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| 221 | )
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| 222 | const hints = []
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| 223 | if (command[2]) hints.push(`[${__('default:').slice(0, -1)}]`) // TODO hacking around i18n here
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| 224 | if (command[3] && command[3].length) {
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| 225 | hints.push(`[${__('aliases:')} ${command[3].join(', ')}]`)
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| 226 | }
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| 227 | if (hints.length) {
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| 228 | ui.div({ text: hints.join(' '), padding: [0, 0, 0, 2], align: 'right' })
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| 229 | } else {
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| 230 | ui.div()
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| 231 | }
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| 232 | })
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| 233 |
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| 234 | ui.div()
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| 235 | }
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| 236 |
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| 237 | // perform some cleanup on the keys array, making it
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| 238 | // only include top-level keys not their aliases.
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| 239 | const aliasKeys = (Object.keys(options.alias) || [])
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| 240 | .concat(Object.keys(yargs.parsed.newAliases) || [])
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| 241 |
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| 242 | keys = keys.filter(key => !yargs.parsed.newAliases[key] && aliasKeys.every(alias => (options.alias[alias] || []).indexOf(key) === -1))
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| 243 |
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| 244 | // populate 'Options:' group with any keys that have not
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| 245 | // explicitly had a group set.
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| 246 | if (!groups[defaultGroup]) groups[defaultGroup] = []
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| 247 | addUngroupedKeys(keys, options.alias, groups)
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| 248 |
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| 249 | // display 'Options:' table along with any custom tables:
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| 250 | Object.keys(groups).forEach((groupName) => {
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| 251 | if (!groups[groupName].length) return
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| 252 |
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| 253 | // if we've grouped the key 'f', but 'f' aliases 'foobar',
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| 254 | // normalizedKeys should contain only 'foobar'.
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| 255 | const normalizedKeys = groups[groupName].filter(filterHiddenOptions).map((key) => {
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| 256 | if (~aliasKeys.indexOf(key)) return key
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| 257 | for (let i = 0, aliasKey; (aliasKey = aliasKeys[i]) !== undefined; i++) {
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| 258 | if (~(options.alias[aliasKey] || []).indexOf(key)) return aliasKey
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| 259 | }
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| 260 | return key
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| 261 | })
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| 262 |
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| 263 | if (normalizedKeys.length < 1) return
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| 264 |
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| 265 | ui.div(__(groupName))
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| 266 |
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| 267 | // actually generate the switches string --foo, -f, --bar.
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| 268 | const switches = normalizedKeys.reduce((acc, key) => {
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| 269 | acc[key] = [ key ].concat(options.alias[key] || [])
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| 270 | .map(sw => {
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| 271 | // for the special positional group don't
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| 272 | // add '--' or '-' prefix.
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| 273 | if (groupName === self.getPositionalGroupName()) return sw
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| 274 | else return (sw.length > 1 ? '--' : '-') + sw
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| 275 | })
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| 276 | .join(', ')
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| 277 |
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| 278 | return acc
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| 279 | }, {})
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| 280 |
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| 281 | normalizedKeys.forEach((key) => {
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| 282 | const kswitch = switches[key]
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| 283 | let desc = descriptions[key] || ''
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| 284 | let type = null
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| 285 |
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| 286 | if (~desc.lastIndexOf(deferY18nLookupPrefix)) desc = __(desc.substring(deferY18nLookupPrefix.length))
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| 287 |
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| 288 | if (~options.boolean.indexOf(key)) type = `[${__('boolean')}]`
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| 289 | if (~options.count.indexOf(key)) type = `[${__('count')}]`
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| 290 | if (~options.string.indexOf(key)) type = `[${__('string')}]`
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| 291 | if (~options.normalize.indexOf(key)) type = `[${__('string')}]`
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| 292 | if (~options.array.indexOf(key)) type = `[${__('array')}]`
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| 293 | if (~options.number.indexOf(key)) type = `[${__('number')}]`
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| 294 |
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| 295 | const extra = [
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| 296 | type,
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| 297 | (key in demandedOptions) ? `[${__('required')}]` : null,
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| 298 | options.choices && options.choices[key] ? `[${__('choices:')} ${
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| 299 | self.stringifiedValues(options.choices[key])}]` : null,
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| 300 | defaultString(options.default[key], options.defaultDescription[key])
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| 301 | ].filter(Boolean).join(' ')
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| 302 |
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| 303 | ui.span(
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| 304 | { text: kswitch, padding: [0, 2, 0, 2], width: maxWidth(switches, theWrap) + 4 },
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| 305 | desc
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| 306 | )
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| 307 |
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| 308 | if (extra) ui.div({ text: extra, padding: [0, 0, 0, 2], align: 'right' })
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| 309 | else ui.div()
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| 310 | })
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| 311 |
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| 312 | ui.div()
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| 313 | })
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| 314 |
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| 315 | // describe some common use-cases for your application.
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| 316 | if (examples.length) {
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| 317 | ui.div(__('Examples:'))
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| 318 |
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| 319 | examples.forEach((example) => {
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| 320 | example[0] = example[0].replace(/\$0/g, base$0)
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| 321 | })
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| 322 |
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| 323 | examples.forEach((example) => {
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| 324 | if (example[1] === '') {
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| 325 | ui.div(
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| 326 | {
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| 327 | text: example[0],
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| 328 | padding: [0, 2, 0, 2]
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| 329 | }
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| 330 | )
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| 331 | } else {
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| 332 | ui.div(
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| 333 | {
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| 334 | text: example[0],
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| 335 | padding: [0, 2, 0, 2],
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| 336 | width: maxWidth(examples, theWrap) + 4
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| 337 | }, {
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| 338 | text: example[1]
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| 339 | }
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| 340 | )
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| 341 | }
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| 342 | })
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| 343 |
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| 344 | ui.div()
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| 345 | }
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| 346 |
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| 347 | // the usage string.
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| 348 | if (epilog) {
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| 349 | const e = epilog.replace(/\$0/g, base$0)
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| 350 | ui.div(`${e}\n`)
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| 351 | }
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| 352 |
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| 353 | // Remove the trailing white spaces
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| 354 | return ui.toString().replace(/\s*$/, '')
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| 355 | }
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| 356 |
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| 357 | // return the maximum width of a string
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| 358 | // in the left-hand column of a table.
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| 359 | function maxWidth (table, theWrap, modifier) {
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| 360 | let width = 0
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| 361 |
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| 362 | // table might be of the form [leftColumn],
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| 363 | // or {key: leftColumn}
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| 364 | if (!Array.isArray(table)) {
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| 365 | table = Object.keys(table).map(key => [table[key]])
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| 366 | }
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| 367 |
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| 368 | table.forEach((v) => {
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| 369 | width = Math.max(
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| 370 | stringWidth(modifier ? `${modifier} ${v[0]}` : v[0]),
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| 371 | width
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| 372 | )
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| 373 | })
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| 374 |
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| 375 | // if we've enabled 'wrap' we should limit
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| 376 | // the max-width of the left-column.
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| 377 | if (theWrap) width = Math.min(width, parseInt(theWrap * 0.5, 10))
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| 378 |
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| 379 | return width
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| 380 | }
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| 381 |
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| 382 | // make sure any options set for aliases,
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| 383 | // are copied to the keys being aliased.
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| 384 | function normalizeAliases () {
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| 385 | // handle old demanded API
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| 386 | const demandedOptions = yargs.getDemandedOptions()
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| 387 | const options = yargs.getOptions()
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| 388 |
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| 389 | ;(Object.keys(options.alias) || []).forEach((key) => {
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| 390 | options.alias[key].forEach((alias) => {
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| 391 | // copy descriptions.
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| 392 | if (descriptions[alias]) self.describe(key, descriptions[alias])
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| 393 | // copy demanded.
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| 394 | if (alias in demandedOptions) yargs.demandOption(key, demandedOptions[alias])
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| 395 | // type messages.
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| 396 | if (~options.boolean.indexOf(alias)) yargs.boolean(key)
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| 397 | if (~options.count.indexOf(alias)) yargs.count(key)
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| 398 | if (~options.string.indexOf(alias)) yargs.string(key)
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| 399 | if (~options.normalize.indexOf(alias)) yargs.normalize(key)
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| 400 | if (~options.array.indexOf(alias)) yargs.array(key)
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| 401 | if (~options.number.indexOf(alias)) yargs.number(key)
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| 402 | })
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| 403 | })
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| 404 | }
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| 405 |
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| 406 | // given a set of keys, place any keys that are
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| 407 | // ungrouped under the 'Options:' grouping.
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| 408 | function addUngroupedKeys (keys, aliases, groups) {
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| 409 | let groupedKeys = []
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| 410 | let toCheck = null
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| 411 | Object.keys(groups).forEach((group) => {
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| 412 | groupedKeys = groupedKeys.concat(groups[group])
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| 413 | })
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| 414 |
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| 415 | keys.forEach((key) => {
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| 416 | toCheck = [key].concat(aliases[key])
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| 417 | if (!toCheck.some(k => groupedKeys.indexOf(k) !== -1)) {
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| 418 | groups[defaultGroup].push(key)
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| 419 | }
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| 420 | })
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| 421 | return groupedKeys
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| 422 | }
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| 423 |
|
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| 424 | function filterHiddenOptions (key) {
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| 425 | return yargs.getOptions().hiddenOptions.indexOf(key) < 0 || yargs.parsed.argv[yargs.getOptions().showHiddenOpt]
|
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| 426 | }
|
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| 427 |
|
|---|
| 428 | self.showHelp = (level) => {
|
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| 429 | const logger = yargs._getLoggerInstance()
|
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| 430 | if (!level) level = 'error'
|
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| 431 | const emit = typeof level === 'function' ? level : logger[level]
|
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| 432 | emit(self.help())
|
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| 433 | }
|
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| 434 |
|
|---|
| 435 | self.functionDescription = (fn) => {
|
|---|
| 436 | const description = fn.name ? decamelize(fn.name, '-') : __('generated-value')
|
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| 437 | return ['(', description, ')'].join('')
|
|---|
| 438 | }
|
|---|
| 439 |
|
|---|
| 440 | self.stringifiedValues = function stringifiedValues (values, separator) {
|
|---|
| 441 | let string = ''
|
|---|
| 442 | const sep = separator || ', '
|
|---|
| 443 | const array = [].concat(values)
|
|---|
| 444 |
|
|---|
| 445 | if (!values || !array.length) return string
|
|---|
| 446 |
|
|---|
| 447 | array.forEach((value) => {
|
|---|
| 448 | if (string.length) string += sep
|
|---|
| 449 | string += JSON.stringify(value)
|
|---|
| 450 | })
|
|---|
| 451 |
|
|---|
| 452 | return string
|
|---|
| 453 | }
|
|---|
| 454 |
|
|---|
| 455 | // format the default-value-string displayed in
|
|---|
| 456 | // the right-hand column.
|
|---|
| 457 | function defaultString (value, defaultDescription) {
|
|---|
| 458 | let string = `[${__('default:')} `
|
|---|
| 459 |
|
|---|
| 460 | if (value === undefined && !defaultDescription) return null
|
|---|
| 461 |
|
|---|
| 462 | if (defaultDescription) {
|
|---|
| 463 | string += defaultDescription
|
|---|
| 464 | } else {
|
|---|
| 465 | switch (typeof value) {
|
|---|
| 466 | case 'string':
|
|---|
| 467 | string += `"${value}"`
|
|---|
| 468 | break
|
|---|
| 469 | case 'object':
|
|---|
| 470 | string += JSON.stringify(value)
|
|---|
| 471 | break
|
|---|
| 472 | default:
|
|---|
| 473 | string += value
|
|---|
| 474 | }
|
|---|
| 475 | }
|
|---|
| 476 |
|
|---|
| 477 | return `${string}]`
|
|---|
| 478 | }
|
|---|
| 479 |
|
|---|
| 480 | // guess the width of the console window, max-width 80.
|
|---|
| 481 | function windowWidth () {
|
|---|
| 482 | const maxWidth = 80
|
|---|
| 483 | if (typeof process === 'object' && process.stdout && process.stdout.columns) {
|
|---|
| 484 | return Math.min(maxWidth, process.stdout.columns)
|
|---|
| 485 | } else {
|
|---|
| 486 | return maxWidth
|
|---|
| 487 | }
|
|---|
| 488 | }
|
|---|
| 489 |
|
|---|
| 490 | // logic for displaying application version.
|
|---|
| 491 | let version = null
|
|---|
| 492 | self.version = (ver) => {
|
|---|
| 493 | version = ver
|
|---|
| 494 | }
|
|---|
| 495 |
|
|---|
| 496 | self.showVersion = () => {
|
|---|
| 497 | const logger = yargs._getLoggerInstance()
|
|---|
| 498 | logger.log(version)
|
|---|
| 499 | }
|
|---|
| 500 |
|
|---|
| 501 | self.reset = function reset (localLookup) {
|
|---|
| 502 | // do not reset wrap here
|
|---|
| 503 | // do not reset fails here
|
|---|
| 504 | failMessage = null
|
|---|
| 505 | failureOutput = false
|
|---|
| 506 | usages = []
|
|---|
| 507 | usageDisabled = false
|
|---|
| 508 | epilog = undefined
|
|---|
| 509 | examples = []
|
|---|
| 510 | commands = []
|
|---|
| 511 | descriptions = objFilter(descriptions, (k, v) => !localLookup[k])
|
|---|
| 512 | return self
|
|---|
| 513 | }
|
|---|
| 514 |
|
|---|
| 515 | let frozen
|
|---|
| 516 | self.freeze = function freeze () {
|
|---|
| 517 | frozen = {}
|
|---|
| 518 | frozen.failMessage = failMessage
|
|---|
| 519 | frozen.failureOutput = failureOutput
|
|---|
| 520 | frozen.usages = usages
|
|---|
| 521 | frozen.usageDisabled = usageDisabled
|
|---|
| 522 | frozen.epilog = epilog
|
|---|
| 523 | frozen.examples = examples
|
|---|
| 524 | frozen.commands = commands
|
|---|
| 525 | frozen.descriptions = descriptions
|
|---|
| 526 | }
|
|---|
| 527 | self.unfreeze = function unfreeze () {
|
|---|
| 528 | failMessage = frozen.failMessage
|
|---|
| 529 | failureOutput = frozen.failureOutput
|
|---|
| 530 | usages = frozen.usages
|
|---|
| 531 | usageDisabled = frozen.usageDisabled
|
|---|
| 532 | epilog = frozen.epilog
|
|---|
| 533 | examples = frozen.examples
|
|---|
| 534 | commands = frozen.commands
|
|---|
| 535 | descriptions = frozen.descriptions
|
|---|
| 536 | frozen = undefined
|
|---|
| 537 | }
|
|---|
| 538 |
|
|---|
| 539 | return self
|
|---|
| 540 | }
|
|---|
