blob: 13841e5332bdbe61a7fef00161328f209812c513 [file] [log] [blame]
(function() {
var LONG_FLAG, MULTI_FLAG, OPTIONAL, OptionParser, SHORT_FLAG, buildRule, buildRules, normalizeArguments;
exports.OptionParser = OptionParser = (function() {
function OptionParser(rules, banner) {
this.banner = banner;
this.rules = buildRules(rules);
}
OptionParser.prototype.parse = function(args) {
var arg, i, isOption, matchedRule, options, rule, value, _i, _len, _len2, _ref;
options = {
arguments: [],
literals: []
};
args = normalizeArguments(args);
for (i = 0, _len = args.length; i < _len; i++) {
arg = args[i];
if (arg === '--') {
options.literals = args.slice(i + 1);
break;
}
isOption = !!(arg.match(LONG_FLAG) || arg.match(SHORT_FLAG));
matchedRule = false;
_ref = this.rules;
for (_i = 0, _len2 = _ref.length; _i < _len2; _i++) {
rule = _ref[_i];
if (rule.shortFlag === arg || rule.longFlag === arg) {
value = rule.hasArgument ? args[i += 1] : true;
options[rule.name] = rule.isList ? (options[rule.name] || []).concat(value) : value;
matchedRule = true;
break;
}
}
if (isOption && !matchedRule) {
throw new Error("unrecognized option: " + arg);
}
if (!isOption) {
options.arguments = args.slice(i);
break;
}
}
return options;
};
OptionParser.prototype.help = function() {
var letPart, lines, rule, spaces, _i, _len, _ref;
lines = [];
if (this.banner) {
lines.unshift("" + this.banner + "\n");
}
_ref = this.rules;
for (_i = 0, _len = _ref.length; _i < _len; _i++) {
rule = _ref[_i];
spaces = 15 - rule.longFlag.length;
spaces = spaces > 0 ? Array(spaces + 1).join(' ') : '';
letPart = rule.shortFlag ? rule.shortFlag + ', ' : ' ';
lines.push(' ' + letPart + rule.longFlag + spaces + rule.description);
}
return "\n" + (lines.join('\n')) + "\n";
};
return OptionParser;
})();
LONG_FLAG = /^(--\w[\w\-]+)/;
SHORT_FLAG = /^(-\w)/;
MULTI_FLAG = /^-(\w{2,})/;
OPTIONAL = /\[(\w+(\*?))\]/;
buildRules = function(rules) {
var tuple, _i, _len, _results;
_results = [];
for (_i = 0, _len = rules.length; _i < _len; _i++) {
tuple = rules[_i];
if (tuple.length < 3) {
tuple.unshift(null);
}
_results.push(buildRule.apply(null, tuple));
}
return _results;
};
buildRule = function(shortFlag, longFlag, description, options) {
var match;
if (options == null) {
options = {};
}
match = longFlag.match(OPTIONAL);
longFlag = longFlag.match(LONG_FLAG)[1];
return {
name: longFlag.substr(2),
shortFlag: shortFlag,
longFlag: longFlag,
description: description,
hasArgument: !!(match && match[1]),
isList: !!(match && match[2])
};
};
normalizeArguments = function(args) {
var arg, l, match, result, _i, _j, _len, _len2, _ref;
args = args.slice(0);
result = [];
for (_i = 0, _len = args.length; _i < _len; _i++) {
arg = args[_i];
if (match = arg.match(MULTI_FLAG)) {
_ref = match[1].split('');
for (_j = 0, _len2 = _ref.length; _j < _len2; _j++) {
l = _ref[_j];
result.push('-' + l);
}
} else {
result.push(arg);
}
}
return result;
};
}).call(this);