55 lines
1.6 KiB
JavaScript
55 lines
1.6 KiB
JavaScript
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/**
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* @dgService parseArgString
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* @description
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* processes an arg string in 'almost' the same fashion that the command processor does
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* and returns an args object in yargs format.
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* @kind function
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* @param {String} str The arg string to process
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* @return {Object} The args parsed into a yargs format.
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*/
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module.exports = function parseArgString() {
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return function parseArgStringImpl(str) {
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// regex from npm string-argv
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//[^\s'"] Match if not a space ' or "
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//+|['] or Match '
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//([^']*) Match anything that is not '
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//['] Close match if '
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//+|["] or Match "
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//([^"]*) Match anything that is not "
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//["] Close match if "
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var rx = /[^\s'"]+|[']([^']*?)[']|["]([^"]*?)["]/gi;
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var value = str;
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var unnammedArgs = [];
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var args = {_: unnammedArgs};
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var match, key;
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do {
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//Each call to exec returns the next regex match as an array
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match = rx.exec(value);
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if (match !== null) {
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//Index 1 in the array is the captured group if it exists
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//Index 0 is the matched text, which we use if no captured group exists
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var arg = match[2] ? match[2] : (match[1] ? match[1] : match[0]);
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if (key) {
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args[key] = arg;
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key = null;
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} else {
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if (arg.substr(arg.length - 1) === '=') {
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key = arg.substr(0, arg.length - 1);
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// remove leading '-' if it exists.
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if (key.substr(0, 1) == '-') {
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key = key.substr(1);
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}
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} else {
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unnammedArgs.push(arg)
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key = null;
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}
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}
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}
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} while (match !== null);
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return args;
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}
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}
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