From 9df98e65f842cf3acae09cbdd969966f42d64469 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Sat, 14 Oct 2017 18:40:54 +0200
Subject: update dependencies

---
 node_modules/webpack/lib/CachePlugin.js | 34 ++++++++++++++++++++++++---------
 1 file changed, 25 insertions(+), 9 deletions(-)

(limited to 'node_modules/webpack/lib/CachePlugin.js')

diff --git a/node_modules/webpack/lib/CachePlugin.js b/node_modules/webpack/lib/CachePlugin.js
index 1b8d6a30e..9c19b8140 100644
--- a/node_modules/webpack/lib/CachePlugin.js
+++ b/node_modules/webpack/lib/CachePlugin.js
@@ -18,15 +18,31 @@ class CachePlugin {
 				c.apply(new CachePlugin(this.cache[idx] = this.cache[idx] || {}));
 			});
 		} else {
-			compiler.plugin("compilation", compilation => {
-				if(!compilation.notCacheable) {
-					compilation.cache = this.cache;
-				} else if(this.watching) {
-					compilation.warnings.push(
-						new Error(`CachePlugin - Cache cannot be used because of: ${compilation.notCacheable}`)
-					);
-				}
-			});
+			const registerCacheToCompiler = (compiler, cache) => {
+				compiler.plugin("this-compilation", compilation => {
+					// TODO remove notCacheable for webpack 4
+					if(!compilation.notCacheable) {
+						compilation.cache = cache;
+						compilation.plugin("child-compiler", (childCompiler, compilerName, compilerIndex) => {
+							if(cache) {
+								let childCache;
+								if(!cache.children) cache.children = {};
+								if(!cache.children[compilerName]) cache.children[compilerName] = [];
+								if(cache.children[compilerName][compilerIndex])
+									childCache = cache.children[compilerName][compilerIndex];
+								else
+									cache.children[compilerName].push(childCache = {});
+								registerCacheToCompiler(childCompiler, childCache);
+							}
+						});
+					} else if(this.watching) {
+						compilation.warnings.push(
+							new Error(`CachePlugin - Cache cannot be used because of: ${compilation.notCacheable}`)
+						);
+					}
+				});
+			};
+			registerCacheToCompiler(compiler, this.cache);
 			compiler.plugin("watch-run", (compiler, callback) => {
 				this.watching = true;
 				callback();
-- 
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