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Filename : parse-command.js

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export function parseCommand(cmd) {
    const extraSpacesStrippedCommand = cmd.replace(/\s{2,}/g, ' ');
    const splitCommand = extraSpacesStrippedCommand.split(/\s+(?![^[]*]|[^<]*>)/);
    const bregex = /\.*[\][<>]/g;
    const firstCommand = splitCommand.shift();
    if (!firstCommand)
        throw new Error(`No command found in: ${cmd}`);
    const parsedCommand = {
        cmd: firstCommand.replace(bregex, ''),
        demanded: [],
        optional: [],
    };
    splitCommand.forEach((cmd, i) => {
        let variadic = false;
        cmd = cmd.replace(/\s/g, '');
        if (/\.+[\]>]/.test(cmd) && i === splitCommand.length - 1)
            variadic = true;
        if (/^\[/.test(cmd)) {
            parsedCommand.optional.push({
                cmd: cmd.replace(bregex, '').split('|'),
                variadic,
            });
        }
        else {
            parsedCommand.demanded.push({
                cmd: cmd.replace(bregex, '').split('|'),
                variadic,
            });
        }
    });
    return parsedCommand;
}