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/** @namespace */
Opt = {
/**
* Get commandline option values.
* @param {Array} args Commandline arguments. Like ["-a=xml", "-b", "--class=new", "--debug"]
* @param {object} optNames Map short names to long names. Like {a:"accept", b:"backtrace", c:"class", d:"debug"}.
* @return {object} Short names and values. Like {a:"xml", b:true, c:"new", d:true}
*/
get: function(args, optNames) {
var opt = {"_": []}; // the unnamed option allows multiple values
for (var i = 0; i < args.length; i++) {
var arg = new String(args[i]);
var name;
var value;
if (arg.charAt(0) == "-") {
if (arg.charAt(1) == "-") { // it's a longname like --foo
arg = arg.substring(2);
var m = arg.split("=");
name = m.shift();
value = m.shift();
if (typeof value == "undefined") value = true;
for (var n in optNames) { // convert it to a shortname
if (name == optNames[n]) {
name = n;
}
}
}
else { // it's a shortname like -f
arg = arg.substring(1);
var m = arg.split("=");
name = m.shift();
value = m.shift();
if (typeof value == "undefined") value = true;
for (var n in optNames) { // find the matching key
if (name == n || name+'[]' == n) {
name = n;
break;
}
}
}
if (name.match(/(.+)\[\]$/)) { // it's an array type like n[]
name = RegExp.$1;
if (!opt[name]) opt[name] = [];
}
if (opt[name] && opt[name].push) {
opt[name].push(value);
}
else {
opt[name] = value;
}
}
else { // not associated with any optname
opt._.push(args[i]);
}
}
return opt;
}
}
/*t:
plan(11, "Testing Opt.");
is(
typeof Opt,
"object",
"Opt is an object."
);
is(
typeof Opt.get,
"function",
"Opt.get is a function."
);
var optNames = {a:"accept", b:"backtrace", c:"class", d:"debug", "e[]":"exceptions"};
var t_options = Opt.get(["-a=xml", "-b", "--class=new", "--debug", "-e=one", "-e=two", "foo", "bar"], optNames);
is(
t_options.a,
"xml",
"an option defined with a short name can be accessed by its short name."
);
is(
t_options.b,
true,
"an option defined with a short name and no value are true."
);
is(
t_options.c,
"new",
"an option defined with a long name can be accessed by its short name."
);
is(
t_options.d,
true,
"an option defined with a long name and no value are true."
);
is(
typeof t_options.e,
"object",
"an option that can accept multiple values is defined."
);
is(
t_options.e.length,
2,
"an option that can accept multiple values can have more than one value."
);
is(
t_options.e[1],
"two",
"an option that can accept multiple values can be accessed as an array."
);
is(
typeof t_options._,
"object",
"the property '_' is defined for unnamed options."
);
is(
t_options._[0],
"foo",
"the property '_' can be accessed as an array."
);
*/
|
