add cache.idleTimeoutForInitialStore

to allow to force an initial store

Author: sokra

declarations/WebpackOptions.d.ts

@@ -432,9 +432,13 @@ export interface FileCacheOptions {
 	 */
 	hashAlgorithm?: string;
 	/**
-	 * Time in ms after which idle period cache storing should happen (only for store: 'pack' or 'idle')
+	 * Time in ms after which idle period the cache storing should happen (only for store: 'pack' or 'idle')
 	 */
 	idleTimeout?: number;
+	/**
+	 * Time in ms after which idle period the initial cache storing should happen (only for store: 'pack' or 'idle')
+	 */
+	idleTimeoutForInitialStore?: number;
 	/**
 	 * Display log info. (debug: all access and errors with stack trace, verbose: all access, info: all write access, warning: only failed serialization)
 	 */

lib/cache/FileCachePlugin.js

@@ -126,7 +126,11 @@ class FileCachePlugin {
 			? { debug: 4, verbose: 3, info: 2, warning: 1 }[this.options.loglevel]
 			: 0;
 		const store = this.options.store || "pack";
-		const idleTimeout = this.options.idleTimeout || 0;
+		const idleTimeout = this.options.idleTimeout || 10000;
+		const idleTimeoutForInitialStore = Math.min(
+			idleTimeout,
+			this.options.idleTimeoutForInitialStore || 0
+		);
 
 		const resolvedPromise = Promise.resolve();
 
@@ -345,6 +349,7 @@ class FileCachePlugin {
 
 		let currentIdlePromise;
 		let isIdle = false;
+		let isInitialStore = true;
 		const processIdleTasks = () => {
 			if (isIdle) {
 				if (pendingPromiseFactories.size > 0) {
@@ -359,10 +364,16 @@ class FileCachePlugin {
 					currentIdlePromise = Promise.all(promises).then(() => {
 						currentIdlePromise = undefined;
 					});
-					currentIdlePromise.then(processIdleTasks);
-				} else if (store === "pack") {
+					currentIdlePromise.then(() => {
+						// Allow to exit the process inbetween
+						setTimeout(processIdleTasks, 0).unref();
+					});
+					return;
+				}
+				if (store === "pack") {
 					currentIdlePromise = serializePack();
 				}
+				isInitialStore = false;
 			}
 		};
 		let idleTimer = undefined;
@@ -371,7 +382,8 @@ class FileCachePlugin {
 				idleTimer = undefined;
 				isIdle = true;
 				resolvedPromise.then(processIdleTasks);
-			}, idleTimeout);
+			}, isInitialStore ? idleTimeoutForInitialStore : idleTimeout);
+			idleTimer.unref();
 		});
 		compiler.cache.hooks.endIdle.tap("FileCachePlugin", () => {
 			if (idleTimer) {

schemas/WebpackOptions.json

@@ -169,7 +169,12 @@
           "type": "string"
         },
         "idleTimeout": {
-          "description": "Time in ms after which idle period cache storing should happen (only for store: 'pack' or 'idle')",
+          "description": "Time in ms after which idle period the cache storing should happen (only for store: 'pack' or 'idle')",
+          "type": "number",
+          "minimum": 0
+        },
+        "idleTimeoutForInitialStore": {
+          "description": "Time in ms after which idle period the initial cache storing should happen (only for store: 'pack' or 'idle')",
           "type": "number",
           "minimum": 0
         },