p-lock/.auto/build/index.js

Simple promise lock

export function getLock(options = {}) {
    const queues = {};
    function startNext(key) {
        var _queues_key, _queues_key_;
        const releaseFn = ()=>{
            var _queues_key;
            (_queues_key = queues[key]) === null || _queues_key === void 0 ? void 0 : _queues_key.shift();
            startNext(key);
        };
        (_queues_key = queues[key]) === null || _queues_key === void 0 ? void 0 : (_queues_key_ = _queues_key[0]) === null || _queues_key_ === void 0 ? void 0 : _queues_key_.start(releaseFn);
    }
    return async (key = "")=>{
        var _queues_key;
        const queue = (_queues_key = queues[key]) !== null && _queues_key !== void 0 ? _queues_key : [];
        if (queues[key] === undefined) {
            queues[key] = queue;
        }
        return new Promise((start, reject)=>{
            if (options.replace && queue.length > 1) {
                var _queue_;
                (_queue_ = queue[1]) === null || _queue_ === void 0 ? void 0 : _queue_.reject();
                queue[1] = {
                    start,
                    reject
                };
            } else {
                queue.push({
                    start,
                    reject
                });
            }
            if (queue.length === 1) {
                return startNext(key);
            } else {
                return undefined;
            }
        });
    };
}