From de98e0b232509d5f40c135d540a70e415272ff85 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Wed, 3 May 2017 15:35:00 +0200
Subject: node_modules

---
 .../webpack/lib/node/NodeWatchFileSystem.js        | 72 ++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 node_modules/webpack/lib/node/NodeWatchFileSystem.js

(limited to 'node_modules/webpack/lib/node/NodeWatchFileSystem.js')

diff --git a/node_modules/webpack/lib/node/NodeWatchFileSystem.js b/node_modules/webpack/lib/node/NodeWatchFileSystem.js
new file mode 100644
index 000000000..a4ff6c6b5
--- /dev/null
+++ b/node_modules/webpack/lib/node/NodeWatchFileSystem.js
@@ -0,0 +1,72 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const Watchpack = require("watchpack");
+
+class NodeWatchFileSystem {
+	constructor(inputFileSystem) {
+		this.inputFileSystem = inputFileSystem;
+		this.watcherOptions = {
+			aggregateTimeout: 0
+		};
+		this.watcher = new Watchpack(this.watcherOptions);
+	}
+
+	watch(files, dirs, missing, startTime, options, callback, callbackUndelayed) {
+		if(!Array.isArray(files))
+			throw new Error("Invalid arguments: 'files'");
+		if(!Array.isArray(dirs))
+			throw new Error("Invalid arguments: 'dirs'");
+		if(!Array.isArray(missing))
+			throw new Error("Invalid arguments: 'missing'");
+		if(typeof callback !== "function")
+			throw new Error("Invalid arguments: 'callback'");
+		if(typeof startTime !== "number" && startTime)
+			throw new Error("Invalid arguments: 'startTime'");
+		if(typeof options !== "object")
+			throw new Error("Invalid arguments: 'options'");
+		if(typeof callbackUndelayed !== "function" && callbackUndelayed)
+			throw new Error("Invalid arguments: 'callbackUndelayed'");
+		const oldWatcher = this.watcher;
+		this.watcher = new Watchpack(options);
+
+		if(callbackUndelayed)
+			this.watcher.once("change", callbackUndelayed);
+
+		this.watcher.once("aggregated", (changes, removals) => {
+			changes = changes.concat(removals);
+			if(this.inputFileSystem && this.inputFileSystem.purge) {
+				this.inputFileSystem.purge(changes);
+			}
+			const times = this.watcher.getTimes();
+			callback(null,
+				changes.filter(file => files.indexOf(file) >= 0).sort(),
+				changes.filter(file => dirs.indexOf(file) >= 0).sort(),
+				changes.filter(file => missing.indexOf(file) >= 0).sort(), times, times);
+		});
+
+		this.watcher.watch(files.concat(missing), dirs, startTime);
+
+		if(oldWatcher) {
+			oldWatcher.close();
+		}
+		return {
+			close: () => {
+				if(this.watcher) {
+					this.watcher.close();
+					this.watcher = null;
+				}
+			},
+			pause: () => {
+				if(this.watcher) {
+					this.watcher.pause();
+				}
+			}
+		};
+	}
+}
+
+module.exports = NodeWatchFileSystem;
-- 
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