subparsers.js
3.55 KB
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
/** internal
* class ActionSubparsers
*
* Support the creation of such sub-commands with the addSubparsers()
*
* This class inherited from [[Action]]
**/
'use strict';
var util = require('util');
var format = require('util').format;
var _ = require('underscore');
var Action = require('../action');
// Constants
var $$ = require('../const');
// Errors
var argumentErrorHelper = require('../argument/error');
/*:nodoc:*
* new ChoicesPseudoAction(name, help)
*
* Create pseudo action for correct help text
*
**/
var ChoicesPseudoAction = function (name, help) {
var options = {
optionStrings: [],
dest: name,
help: help
};
Action.call(this, options);
};
util.inherits(ChoicesPseudoAction, Action);
/**
* new ActionSubparsers(options)
* - options (object): options hash see [[Action.new]]
*
**/
var ActionSubparsers = module.exports = function ActionSubparsers(options) {
options = options || {};
options.dest = options.dest || $$.SUPPRESS;
options.nargs = $$.PARSER;
this.debug = (options.debug === true);
this._progPrefix = options.prog;
this._parserClass = options.parserClass;
this._nameParserMap = {};
this._choicesActions = [];
options.choices = this._nameParserMap;
Action.call(this, options);
};
util.inherits(ActionSubparsers, Action);
/*:nodoc:*
* ActionSubparsers#addParser(name, options) -> ArgumentParser
* - name (string): sub-command name
* - options (object): see [[ArgumentParser.new]]
*
* Note:
* addParser supports an additional aliases option,
* which allows multiple strings to refer to the same subparser.
* This example, like svn, aliases co as a shorthand for checkout
*
**/
ActionSubparsers.prototype.addParser = function (name, options) {
var parser;
var self = this;
options = options || {};
options.debug = (this.debug === true);
// set program from the existing prefix
if (!options.prog) {
options.prog = this._progPrefix + ' ' + name;
}
var aliases = options.aliases || [];
// create a pseudo-action to hold the choice help
if (!!options.help || _.isString(options.help)) {
var help = options.help;
delete options.help;
var choiceAction = new ChoicesPseudoAction(name, help);
this._choicesActions.push(choiceAction);
}
// create the parser and add it to the map
parser = new this._parserClass(options);
this._nameParserMap[name] = parser;
// make parser available under aliases also
aliases.forEach(function (alias) {
self._nameParserMap[alias] = parser;
});
return parser;
};
ActionSubparsers.prototype._getSubactions = function () {
return this._choicesActions;
};
/*:nodoc:*
* ActionSubparsers#call(parser, namespace, values, optionString) -> Void
* - parser (ArgumentParser): current parser
* - namespace (Namespace): namespace for output data
* - values (Array): parsed values
* - optionString (Array): input option string(not parsed)
*
* Call the action. Parse input aguments
**/
ActionSubparsers.prototype.call = function (parser, namespace, values) {
var parserName = values[0];
var argStrings = values.slice(1);
// set the parser name if requested
if (this.dest !== $$.SUPPRESS) {
namespace[this.dest] = parserName;
}
// select the parser
if (!!this._nameParserMap[parserName]) {
parser = this._nameParserMap[parserName];
} else {
throw argumentErrorHelper(format(
'Unknown parser "%s" (choices: [%s]).',
parserName,
_.keys(this._nameParserMap).join(', ')
));
}
// parse all the remaining options into the namespace
parser.parseArgs(argStrings, namespace);
};