1 files changed, 57 insertions, 0 deletions
diff --git a/node_modules/p-limit/index.js b/node_modules/p-limit/index.js
new file mode 100644
index 0000000..6a72a4c
--- /dev/null
+++ b/node_modules/p-limit/index.js
@@ -0,0 +1,57 @@
+'use strict';
+const pTry = require('p-try');
+
+const pLimit = concurrency => {
+	if (!((Number.isInteger(concurrency) || concurrency === Infinity) && concurrency > 0)) {
+		return Promise.reject(new TypeError('Expected `concurrency` to be a number from 1 and up'));
+	}
+
+	const queue = [];
+	let activeCount = 0;
+
+	const next = () => {
+		activeCount--;
+
+		if (queue.length > 0) {
+			queue.shift()();
+		}
+	};
+
+	const run = (fn, resolve, ...args) => {
+		activeCount++;
+
+		const result = pTry(fn, ...args);
+
+		resolve(result);
+
+		result.then(next, next);
+	};
+
+	const enqueue = (fn, resolve, ...args) => {
+		if (activeCount < concurrency) {
+			run(fn, resolve, ...args);
+		} else {
+			queue.push(run.bind(null, fn, resolve, ...args));
+		}
+	};
+
+	const generator = (fn, ...args) => new Promise(resolve => enqueue(fn, resolve, ...args));
+	Object.defineProperties(generator, {
+		activeCount: {
+			get: () => activeCount
+		},
+		pendingCount: {
+			get: () => queue.length
+		},
+		clearQueue: {
+			value: () => {
+				queue.length = 0;
+			}
+		}
+	});
+
+	return generator;
+};
+
+module.exports = pLimit;
+module.exports.default = pLimit;