@bitblit/ratchet-common/lib/lang/simple-arg-ratchet.js

Common tools for general use

import { ErrorRatchet } from './error-ratchet.js';
export class SimpleArgRatchet {
    constructor() { }
    static parseArgs(args, validArgNames) {
        const rval = {};
        if (args?.length) {
            if (args.length % 2 !== 0) {
                throw ErrorRatchet.fErr('Invalid arguments, all args must take the form --a b, but there were an odd number of arguments');
            }
            for (let i = 0; i < args.length; i += 2) {
                let key = args[i];
                const value = args[i + 1];
                if (!key.startsWith('--')) {
                    throw ErrorRatchet.fErr('Argument %s does not take the form --x', key);
                }
                key = key.substring(2);
                if (!validArgNames.includes(key)) {
                    throw ErrorRatchet.fErr('Argument %s is not a valid argument (valid were %j)', key, validArgNames);
                }
                rval[key] = rval[key] ?? [];
                rval[key].push(value);
            }
        }
        return rval;
    }
    static parseSingleArgs(args, validArgNames) {
        const tmp = SimpleArgRatchet.parseArgs(args, validArgNames);
        const rval = {};
        Object.keys(tmp).forEach((k) => {
            const v = tmp[k];
            if (v.length > 1) {
                throw ErrorRatchet.fErr('Argument %s had %d values, but should have 1', k, v.length);
            }
            rval[k] = v[0];
        });
        return rval;
    }
}
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