mysoft-ypack/src/args.js

app pack

'use strict';

let argv = process.argv.slice(2),
    regexp = /^--?([\w\-]+)(?:=(.+))?$/,
    len = argv.length,
    data = { _: [] };


len -- && argv.reduce((prev, curr, i) => {
    let patt = curr.match(regexp);

    if (patt) {
        if (prev) {
            data[prev] = true;
        }

        if (patt[2]) {
            data[patt[1]] = patt[2];
            return null;
        } else if(len === i) {
            data[patt[1]] = true;
            return null;
        } else {
            return patt[1];
        }
    }

    if (prev) {
        data[prev] = curr;
    }

    data._.push(curr);
    return null;
}, null);

module.exports = {
    key: (...names) => {
        for (let name of names) {
            if (name in data) {
                return data[name];
            }
        }
    },
    find: patt => {
        for (let val of data._) {
            if (patt.test(val)) {
                return val;
            }
        }
    },
    index: i => data._[i]
};