| [6a3a178] | 1 | /*
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| 2 | MIT License http://www.opensource.org/licenses/mit-license.php
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| 3 | Author Tobias Koppers @sokra
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| 4 | */
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| 5 |
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| 6 | "use strict";
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| 7 |
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| 8 | const Cache = require("../Cache");
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| 9 | const ProgressPlugin = require("../ProgressPlugin");
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| 10 |
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| 11 | /** @typedef {import("../Compiler")} Compiler */
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| 12 |
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| 13 | const BUILD_DEPENDENCIES_KEY = Symbol();
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| 14 |
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| 15 | class IdleFileCachePlugin {
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| 16 | /**
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| 17 | * @param {TODO} strategy cache strategy
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| 18 | * @param {number} idleTimeout timeout
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| 19 | * @param {number} idleTimeoutForInitialStore initial timeout
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| 20 | * @param {number} idleTimeoutAfterLargeChanges timeout after changes
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| 21 | */
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| 22 | constructor(
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| 23 | strategy,
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| 24 | idleTimeout,
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| 25 | idleTimeoutForInitialStore,
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| 26 | idleTimeoutAfterLargeChanges
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| 27 | ) {
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| 28 | this.strategy = strategy;
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| 29 | this.idleTimeout = idleTimeout;
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| 30 | this.idleTimeoutForInitialStore = idleTimeoutForInitialStore;
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| 31 | this.idleTimeoutAfterLargeChanges = idleTimeoutAfterLargeChanges;
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| 32 | }
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| 33 |
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| 34 | /**
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| 35 | * Apply the plugin
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| 36 | * @param {Compiler} compiler the compiler instance
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| 37 | * @returns {void}
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| 38 | */
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| 39 | apply(compiler) {
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| 40 | let strategy = this.strategy;
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| 41 | const idleTimeout = this.idleTimeout;
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| 42 | const idleTimeoutForInitialStore = Math.min(
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| 43 | idleTimeout,
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| 44 | this.idleTimeoutForInitialStore
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| 45 | );
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| 46 | const idleTimeoutAfterLargeChanges = this.idleTimeoutAfterLargeChanges;
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| 47 | const resolvedPromise = Promise.resolve();
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| 48 |
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| 49 | let timeSpendInBuild = 0;
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| 50 | let timeSpendInStore = 0;
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| 51 | let avgTimeSpendInStore = 0;
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| 52 |
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| 53 | /** @type {Map<string | typeof BUILD_DEPENDENCIES_KEY, () => Promise>} */
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| 54 | const pendingIdleTasks = new Map();
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| 55 |
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| 56 | compiler.cache.hooks.store.tap(
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| 57 | { name: "IdleFileCachePlugin", stage: Cache.STAGE_DISK },
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| 58 | (identifier, etag, data) => {
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| 59 | pendingIdleTasks.set(identifier, () =>
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| 60 | strategy.store(identifier, etag, data)
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| 61 | );
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| 62 | }
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| 63 | );
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| 64 |
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| 65 | compiler.cache.hooks.get.tapPromise(
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| 66 | { name: "IdleFileCachePlugin", stage: Cache.STAGE_DISK },
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| 67 | (identifier, etag, gotHandlers) => {
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| 68 | const restore = () =>
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| 69 | strategy.restore(identifier, etag).then(cacheEntry => {
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| 70 | if (cacheEntry === undefined) {
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| 71 | gotHandlers.push((result, callback) => {
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| 72 | if (result !== undefined) {
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| 73 | pendingIdleTasks.set(identifier, () =>
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| 74 | strategy.store(identifier, etag, result)
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| 75 | );
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| 76 | }
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| 77 | callback();
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| 78 | });
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| 79 | } else {
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| 80 | return cacheEntry;
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| 81 | }
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| 82 | });
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| 83 | const pendingTask = pendingIdleTasks.get(identifier);
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| 84 | if (pendingTask !== undefined) {
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| 85 | pendingIdleTasks.delete(identifier);
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| 86 | return pendingTask().then(restore);
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| 87 | }
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| 88 | return restore();
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| 89 | }
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| 90 | );
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| 91 |
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| 92 | compiler.cache.hooks.storeBuildDependencies.tap(
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| 93 | { name: "IdleFileCachePlugin", stage: Cache.STAGE_DISK },
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| 94 | dependencies => {
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| 95 | pendingIdleTasks.set(BUILD_DEPENDENCIES_KEY, () =>
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| 96 | strategy.storeBuildDependencies(dependencies)
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| 97 | );
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| 98 | }
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| 99 | );
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| 100 |
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| 101 | compiler.cache.hooks.shutdown.tapPromise(
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| 102 | { name: "IdleFileCachePlugin", stage: Cache.STAGE_DISK },
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| 103 | () => {
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| 104 | if (idleTimer) {
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| 105 | clearTimeout(idleTimer);
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| 106 | idleTimer = undefined;
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| 107 | }
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| 108 | isIdle = false;
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| 109 | const reportProgress = ProgressPlugin.getReporter(compiler);
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| 110 | const jobs = Array.from(pendingIdleTasks.values());
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| 111 | if (reportProgress) reportProgress(0, "process pending cache items");
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| 112 | const promises = jobs.map(fn => fn());
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| 113 | pendingIdleTasks.clear();
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| 114 | promises.push(currentIdlePromise);
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| 115 | const promise = Promise.all(promises);
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| 116 | currentIdlePromise = promise.then(() => strategy.afterAllStored());
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| 117 | if (reportProgress) {
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| 118 | currentIdlePromise = currentIdlePromise.then(() => {
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| 119 | reportProgress(1, `stored`);
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| 120 | });
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| 121 | }
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| 122 | return currentIdlePromise.then(() => {
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| 123 | // Reset strategy
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| 124 | if (strategy.clear) strategy.clear();
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| 125 | });
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| 126 | }
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| 127 | );
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| 128 |
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| 129 | /** @type {Promise<any>} */
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| 130 | let currentIdlePromise = resolvedPromise;
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| 131 | let isIdle = false;
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| 132 | let isInitialStore = true;
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| 133 | const processIdleTasks = () => {
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| 134 | if (isIdle) {
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| 135 | const startTime = Date.now();
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| 136 | if (pendingIdleTasks.size > 0) {
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| 137 | const promises = [currentIdlePromise];
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| 138 | const maxTime = startTime + 100;
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| 139 | let maxCount = 100;
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| 140 | for (const [filename, factory] of pendingIdleTasks) {
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| 141 | pendingIdleTasks.delete(filename);
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| 142 | promises.push(factory());
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| 143 | if (maxCount-- <= 0 || Date.now() > maxTime) break;
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| 144 | }
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| 145 | currentIdlePromise = Promise.all(promises);
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| 146 | currentIdlePromise.then(() => {
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| 147 | timeSpendInStore += Date.now() - startTime;
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| 148 | // Allow to exit the process between
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| 149 | idleTimer = setTimeout(processIdleTasks, 0);
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| 150 | idleTimer.unref();
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| 151 | });
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| 152 | return;
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| 153 | }
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| 154 | currentIdlePromise = currentIdlePromise
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| 155 | .then(async () => {
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| 156 | await strategy.afterAllStored();
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| 157 | timeSpendInStore += Date.now() - startTime;
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| 158 | avgTimeSpendInStore =
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| 159 | Math.max(avgTimeSpendInStore, timeSpendInStore) * 0.9 +
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| 160 | timeSpendInStore * 0.1;
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| 161 | timeSpendInStore = 0;
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| 162 | timeSpendInBuild = 0;
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| 163 | })
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| 164 | .catch(err => {
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| 165 | const logger = compiler.getInfrastructureLogger(
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| 166 | "IdleFileCachePlugin"
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| 167 | );
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| 168 | logger.warn(`Background tasks during idle failed: ${err.message}`);
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| 169 | logger.debug(err.stack);
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| 170 | });
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| 171 | isInitialStore = false;
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| 172 | }
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| 173 | };
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| 174 | let idleTimer = undefined;
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| 175 | compiler.cache.hooks.beginIdle.tap(
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| 176 | { name: "IdleFileCachePlugin", stage: Cache.STAGE_DISK },
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| 177 | () => {
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| 178 | const isLargeChange = timeSpendInBuild > avgTimeSpendInStore * 2;
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| 179 | if (isInitialStore && idleTimeoutForInitialStore < idleTimeout) {
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| 180 | compiler
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| 181 | .getInfrastructureLogger("IdleFileCachePlugin")
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| 182 | .log(
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| 183 | `Initial cache was generated and cache will be persisted in ${
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| 184 | idleTimeoutForInitialStore / 1000
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| 185 | }s.`
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| 186 | );
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| 187 | } else if (
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| 188 | isLargeChange &&
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| 189 | idleTimeoutAfterLargeChanges < idleTimeout
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| 190 | ) {
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| 191 | compiler
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| 192 | .getInfrastructureLogger("IdleFileCachePlugin")
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| 193 | .log(
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| 194 | `Spend ${Math.round(timeSpendInBuild) / 1000}s in build and ${
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| 195 | Math.round(avgTimeSpendInStore) / 1000
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| 196 | }s in average in cache store. This is considered as large change and cache will be persisted in ${
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| 197 | idleTimeoutAfterLargeChanges / 1000
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| 198 | }s.`
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| 199 | );
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| 200 | }
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| 201 | idleTimer = setTimeout(() => {
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| 202 | idleTimer = undefined;
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| 203 | isIdle = true;
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| 204 | resolvedPromise.then(processIdleTasks);
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| 205 | }, Math.min(isInitialStore ? idleTimeoutForInitialStore : Infinity, isLargeChange ? idleTimeoutAfterLargeChanges : Infinity, idleTimeout));
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| 206 | idleTimer.unref();
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| 207 | }
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| 208 | );
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| 209 | compiler.cache.hooks.endIdle.tap(
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| 210 | { name: "IdleFileCachePlugin", stage: Cache.STAGE_DISK },
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| 211 | () => {
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| 212 | if (idleTimer) {
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| 213 | clearTimeout(idleTimer);
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| 214 | idleTimer = undefined;
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| 215 | }
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| 216 | isIdle = false;
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| 217 | }
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| 218 | );
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| 219 | compiler.hooks.done.tap("IdleFileCachePlugin", stats => {
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| 220 | // 10% build overhead is ignored, as it's not cacheable
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| 221 | timeSpendInBuild *= 0.9;
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| 222 | timeSpendInBuild += stats.endTime - stats.startTime;
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| 223 | });
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| 224 | }
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| 225 | }
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| 226 |
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| 227 | module.exports = IdleFileCachePlugin;
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