| 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252 | 1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
| const path = require('path')
const inspect = require('util').inspect
const camelCase = require('camelcase')
// handles parsing positional arguments,
// and populating argv with said positional
// arguments.
module.exports = function (yargs, usage, validation) {
const self = {}
var handlers = {}
var aliasMap = {}
self.addHandler = function (cmd, description, builder, handler) {
var aliases = []
if (Array.isArray(cmd)) {
aliases = cmd.slice(1)
cmd = cmd[0]
} else if (typeof cmd === 'object') {
var command = (Array.isArray(cmd.command) || typeof cmd.command === 'string') ? cmd.command : moduleName(cmd)
if (cmd.aliases) command = [].concat(command).concat(cmd.aliases)
self.addHandler(command, extractDesc(cmd), cmd.builder, cmd.handler)
return
}
// allow a module to be provided instead of separate builder and handler
if (typeof builder === 'object' && builder.builder && typeof builder.handler === 'function') {
self.addHandler([cmd].concat(aliases), description, builder.builder, builder.handler)
return
}
var parsedCommand = parseCommand(cmd)
aliases = aliases.map(function (alias) {
alias = parseCommand(alias).cmd // remove positional args
aliasMap[alias] = parsedCommand.cmd
return alias
})
if (description !== false) {
usage.command(cmd, description, aliases)
}
handlers[parsedCommand.cmd] = {
original: cmd,
handler: handler,
builder: builder || {},
demanded: parsedCommand.demanded,
optional: parsedCommand.optional
}
}
self.addDirectory = function (dir, context, req, callerFile, opts) {
opts = opts || {}
// disable recursion to support nested directories of subcommands
if (typeof opts.recurse !== 'boolean') opts.recurse = false
// exclude 'json', 'coffee' from require-directory defaults
if (!Array.isArray(opts.extensions)) opts.extensions = ['js']
// allow consumer to define their own visitor function
const parentVisit = typeof opts.visit === 'function' ? opts.visit : function (o) { return o }
// call addHandler via visitor function
opts.visit = function (obj, joined, filename) {
const visited = parentVisit(obj, joined, filename)
// allow consumer to skip modules with their own visitor
if (visited) {
// check for cyclic reference
// each command file path should only be seen once per execution
if (~context.files.indexOf(joined)) return visited
// keep track of visited files in context.files
context.files.push(joined)
self.addHandler(visited)
}
return visited
}
require('require-directory')({ require: req, filename: callerFile }, dir, opts)
}
// lookup module object from require()d command and derive name
// if module was not require()d and no name given, throw error
function moduleName (obj) {
const mod = require('which-module')(obj)
if (!mod) throw new Error('No command name given for module: ' + inspect(obj))
return commandFromFilename(mod.filename)
}
// derive command name from filename
function commandFromFilename (filename) {
return path.basename(filename, path.extname(filename))
}
function extractDesc (obj) {
for (var keys = ['describe', 'description', 'desc'], i = 0, l = keys.length, test; i < l; i++) {
test = obj[keys[i]]
if (typeof test === 'string' || typeof test === 'boolean') return test
}
return false
}
function parseCommand (cmd) {
var extraSpacesStrippedCommand = cmd.replace(/\s{2,}/g, ' ')
var splitCommand = extraSpacesStrippedCommand.split(/\s/)
var bregex = /\.*[\][<>]/g
var parsedCommand = {
cmd: (splitCommand.shift()).replace(bregex, ''),
demanded: [],
optional: []
}
splitCommand.forEach(function (cmd, i) {
var variadic = false
if (/\.+[\]>]/.test(cmd) && i === splitCommand.length - 1) variadic = true
if (/^\[/.test(cmd)) {
parsedCommand.optional.push({
cmd: cmd.replace(bregex, ''),
variadic: variadic
})
} else {
parsedCommand.demanded.push({
cmd: cmd.replace(bregex, ''),
variadic: variadic
})
}
})
return parsedCommand
}
self.getCommands = function () {
return Object.keys(handlers).concat(Object.keys(aliasMap))
}
self.getCommandHandlers = function () {
return handlers
}
self.runCommand = function (command, yargs, parsed) {
var argv = parsed.argv
var commandHandler = handlers[command] || handlers[aliasMap[command]]
var innerArgv = argv
var currentContext = yargs.getContext()
var numFiles = currentContext.files.length
var parentCommands = currentContext.commands.slice()
currentContext.commands.push(command)
if (typeof commandHandler.builder === 'function') {
// a function can be provided, which builds
// up a yargs chain and possibly returns it.
innerArgv = commandHandler.builder(yargs.reset(parsed.aliases))
// if the builder function did not yet parse argv with reset yargs
// and did not explicitly set a usage() string, then apply the
// original command string as usage() for consistent behavior with
// options object below
if (yargs.parsed === false) {
if (typeof yargs.getUsageInstance().getUsage() === 'undefined') {
yargs.usage('$0 ' + (parentCommands.length ? parentCommands.join(' ') + ' ' : '') + commandHandler.original)
}
innerArgv = innerArgv ? innerArgv.argv : yargs.argv
} else {
innerArgv = yargs.parsed.argv
}
} else if (typeof commandHandler.builder === 'object') {
// as a short hand, an object can instead be provided, specifying
// the options that a command takes.
innerArgv = yargs.reset(parsed.aliases)
innerArgv.usage('$0 ' + (parentCommands.length ? parentCommands.join(' ') + ' ' : '') + commandHandler.original)
Object.keys(commandHandler.builder).forEach(function (key) {
innerArgv.option(key, commandHandler.builder[key])
})
innerArgv = innerArgv.argv
}
if (!yargs._hasOutput()) populatePositional(commandHandler, innerArgv, currentContext, yargs)
if (commandHandler.handler && !yargs._hasOutput()) {
commandHandler.handler(innerArgv)
}
currentContext.commands.pop()
numFiles = currentContext.files.length - numFiles
if (numFiles > 0) currentContext.files.splice(numFiles * -1, numFiles)
return innerArgv
}
function populatePositional (commandHandler, argv, context, yargs) {
argv._ = argv._.slice(context.commands.length) // nuke the current commands
var demanded = commandHandler.demanded.slice(0)
var optional = commandHandler.optional.slice(0)
validation.positionalCount(demanded.length, argv._.length)
while (demanded.length) {
var demand = demanded.shift()
if (demand.variadic) argv[demand.cmd] = []
if (!argv._.length) break
if (demand.variadic) argv[demand.cmd] = argv._.splice(0)
else argv[demand.cmd] = argv._.shift()
postProcessPositional(yargs, argv, demand.cmd)
addCamelCaseExpansions(argv, demand.cmd)
}
while (optional.length) {
var maybe = optional.shift()
if (maybe.variadic) argv[maybe.cmd] = []
if (!argv._.length) break
if (maybe.variadic) argv[maybe.cmd] = argv._.splice(0)
else argv[maybe.cmd] = argv._.shift()
postProcessPositional(yargs, argv, maybe.cmd)
addCamelCaseExpansions(argv, maybe.cmd)
}
argv._ = context.commands.concat(argv._)
}
// TODO move positional arg logic to yargs-parser and remove this duplication
function postProcessPositional (yargs, argv, key) {
var coerce = yargs.getOptions().coerce[key]
if (typeof coerce === 'function') {
try {
argv[key] = coerce(argv[key])
} catch (err) {
yargs.getUsageInstance().fail(err.message, err)
}
}
}
function addCamelCaseExpansions (argv, option) {
if (/-/.test(option)) {
const cc = camelCase(option)
if (typeof argv[option] === 'object') argv[cc] = argv[option].slice(0)
else argv[cc] = argv[option]
}
}
self.reset = function () {
handlers = {}
aliasMap = {}
return self
}
// used by yargs.parse() to freeze
// the state of commands such that
// we can apply .parse() multiple times
// with the same yargs instance.
var frozen
self.freeze = function () {
frozen = {}
frozen.handlers = handlers
frozen.aliasMap = aliasMap
}
self.unfreeze = function () {
handlers = frozen.handlers
aliasMap = frozen.aliasMap
frozen = undefined
}
return self
}
|