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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const FileSystemInfo = require("../FileSystemInfo");
const ProgressPlugin = require("../ProgressPlugin");
const { formatSize } = require("../SizeFormatHelpers");
const SerializerMiddleware = require("../serialization/SerializerMiddleware");
const LazySet = require("../util/LazySet");
const makeSerializable = require("../util/makeSerializable");
const memoize = require("../util/memoize");
const {
createFileSerializer,
NOT_SERIALIZABLE
} = require("../util/serialization");
/** @typedef {import("../../declarations/WebpackOptions").SnapshotOptions} SnapshotOptions */
/** @typedef {import("../Cache").Etag} Etag */
/** @typedef {import("../Compiler")} Compiler */
/** @typedef {import("../FileSystemInfo").Snapshot} Snapshot */
/** @typedef {import("../logging/Logger").Logger} Logger */
/** @typedef {import("../util/fs").IntermediateFileSystem} IntermediateFileSystem */
class PackContainer {
/**
* @param {Object} data stored data
* @param {string} version version identifier
* @param {Snapshot} buildSnapshot snapshot of all build dependencies
* @param {Set<string>} buildDependencies list of all unresolved build dependencies captured
* @param {Map<string, string | false>} resolveResults result of the resolved build dependencies
* @param {Snapshot} resolveBuildDependenciesSnapshot snapshot of the dependencies of the build dependencies resolving
*/
constructor(
data,
version,
buildSnapshot,
buildDependencies,
resolveResults,
resolveBuildDependenciesSnapshot
) {
this.data = data;
this.version = version;
this.buildSnapshot = buildSnapshot;
this.buildDependencies = buildDependencies;
this.resolveResults = resolveResults;
this.resolveBuildDependenciesSnapshot = resolveBuildDependenciesSnapshot;
}
serialize({ write, writeLazy }) {
write(this.version);
write(this.buildSnapshot);
write(this.buildDependencies);
write(this.resolveResults);
write(this.resolveBuildDependenciesSnapshot);
writeLazy(this.data);
}
deserialize({ read }) {
this.version = read();
this.buildSnapshot = read();
this.buildDependencies = read();
this.resolveResults = read();
this.resolveBuildDependenciesSnapshot = read();
this.data = read();
}
}
makeSerializable(
PackContainer,
"webpack/lib/cache/PackFileCacheStrategy",
"PackContainer"
);
const MIN_CONTENT_SIZE = 1024 * 1024; // 1 MB
const CONTENT_COUNT_TO_MERGE = 10;
const MAX_ITEMS_IN_FRESH_PACK = 50000;
class PackItemInfo {
/**
* @param {string} identifier identifier of item
* @param {string | null} etag etag of item
* @param {any} value fresh value of item
*/
constructor(identifier, etag, value) {
this.identifier = identifier;
this.etag = etag;
this.location = -1;
this.lastAccess = Date.now();
this.freshValue = value;
}
}
class Pack {
constructor(logger, maxAge) {
/** @type {Map<string, PackItemInfo>} */
this.itemInfo = new Map();
/** @type {string[]} */
this.requests = [];
/** @type {Map<string, PackItemInfo>} */
this.freshContent = new Map();
/** @type {(undefined | PackContent)[]} */
this.content = [];
this.invalid = false;
this.logger = logger;
this.maxAge = maxAge;
}
/**
* @param {string} identifier unique name for the resource
* @param {string | null} etag etag of the resource
* @returns {any} cached content
*/
get(identifier, etag) {
const info = this.itemInfo.get(identifier);
this.requests.push(identifier);
if (info === undefined) {
return undefined;
}
if (info.etag !== etag) return null;
info.lastAccess = Date.now();
const loc = info.location;
if (loc === -1) {
return info.freshValue;
} else {
if (!this.content[loc]) {
return undefined;
}
return this.content[loc].get(identifier);
}
}
/**
* @param {string} identifier unique name for the resource
* @param {string | null} etag etag of the resource
* @param {any} data cached content
* @returns {void}
*/
set(identifier, etag, data) {
if (!this.invalid) {
this.invalid = true;
this.logger.log(`Pack got invalid because of write to: ${identifier}`);
}
const info = this.itemInfo.get(identifier);
if (info === undefined) {
const newInfo = new PackItemInfo(identifier, etag, data);
this.itemInfo.set(identifier, newInfo);
this.requests.push(identifier);
this.freshContent.set(identifier, newInfo);
} else {
const loc = info.location;
if (loc >= 0) {
this.requests.push(identifier);
this.freshContent.set(identifier, info);
const content = this.content[loc];
content.delete(identifier);
if (content.items.size === 0) {
this.content[loc] = undefined;
this.logger.debug("Pack %d got empty and is removed", loc);
}
}
info.freshValue = data;
info.lastAccess = Date.now();
info.etag = etag;
info.location = -1;
}
}
getContentStats() {
let count = 0;
let size = 0;
for (const content of this.content) {
if (content !== undefined) {
count++;
const s = content.getSize();
if (s > 0) {
size += s;
}
}
}
return { count, size };
}
/**
* @returns {number} new location of data entries
*/
_findLocation() {
let i;
for (i = 0; i < this.content.length && this.content[i] !== undefined; i++);
return i;
}
_gcAndUpdateLocation(items, usedItems, newLoc) {
let count = 0;
let lastGC;
const now = Date.now();
for (const identifier of items) {
const info = this.itemInfo.get(identifier);
if (now - info.lastAccess > this.maxAge) {
this.itemInfo.delete(identifier);
items.delete(identifier);
usedItems.delete(identifier);
count++;
lastGC = identifier;
} else {
info.location = newLoc;
}
}
if (count > 0) {
this.logger.log(
"Garbage Collected %d old items at pack %d (%d items remaining) e. g. %s",
count,
newLoc,
items.size,
lastGC
);
}
}
_persistFreshContent() {
if (this.freshContent.size > 0) {
const packCount = Math.ceil(
this.freshContent.size / MAX_ITEMS_IN_FRESH_PACK
);
const itemsPerPack = Math.ceil(this.freshContent.size / packCount);
this.logger.log(`${this.freshContent.size} fresh items in cache`);
const packs = Array.from({ length: packCount }, () => {
const loc = this._findLocation();
this.content[loc] = null; // reserve
return {
/** @type {Set<string>} */
items: new Set(),
/** @type {Map<string, any>} */
map: new Map(),
loc
};
});
let i = 0;
let pack = packs[0];
let packIndex = 0;
for (const identifier of this.requests) {
const info = this.freshContent.get(identifier);
if (info === undefined) continue;
pack.items.add(identifier);
pack.map.set(identifier, info.freshValue);
info.location = pack.loc;
info.freshValue = undefined;
this.freshContent.delete(identifier);
if (++i > itemsPerPack) {
i = 0;
pack = packs[++packIndex];
}
}
for (const pack of packs) {
this.content[pack.loc] = new PackContent(
pack.items,
new Set(pack.items),
new PackContentItems(pack.map)
);
}
}
}
/**
* Merges small content files to a single content file
*/
_optimizeSmallContent() {
// 1. Find all small content files
// Treat unused content files separately to avoid
// a merge-split cycle
/** @type {number[]} */
const smallUsedContents = [];
/** @type {number} */
let smallUsedContentSize = 0;
/** @type {number[]} */
const smallUnusedContents = [];
/** @type {number} */
let smallUnusedContentSize = 0;
for (let i = 0; i < this.content.length; i++) {
const content = this.content[i];
if (content === undefined) continue;
if (content.outdated) continue;
const size = content.getSize();
if (size < 0 || size > MIN_CONTENT_SIZE) continue;
if (content.used.size > 0) {
smallUsedContents.push(i);
smallUsedContentSize += size;
} else {
smallUnusedContents.push(i);
smallUnusedContentSize += size;
}
}
// 2. Check if minimum number is reached
let mergedIndices;
if (
smallUsedContents.length >= CONTENT_COUNT_TO_MERGE ||
smallUsedContentSize > MIN_CONTENT_SIZE
) {
mergedIndices = smallUsedContents;
} else if (
smallUnusedContents.length >= CONTENT_COUNT_TO_MERGE ||
smallUnusedContentSize > MIN_CONTENT_SIZE
) {
mergedIndices = smallUnusedContents;
} else return;
const mergedContent = [];
// 3. Remove old content entries
for (const i of mergedIndices) {
mergedContent.push(this.content[i]);
this.content[i] = undefined;
}
// 4. Determine merged items
/** @type {Set<string>} */
const mergedItems = new Set();
/** @type {Set<string>} */
const mergedUsedItems = new Set();
/** @type {(function(Map<string, any>): Promise)[]} */
const addToMergedMap = [];
for (const content of mergedContent) {
for (const identifier of content.items) {
mergedItems.add(identifier);
}
for (const identifer of content.used) {
mergedUsedItems.add(identifer);
}
addToMergedMap.push(async map => {
// unpack existing content
// after that values are accessible in .content
await content.unpack();
for (const [identifier, value] of content.content) {
map.set(identifier, value);
}
});
}
// 5. GC and update location of merged items
const newLoc = this._findLocation();
this._gcAndUpdateLocation(mergedItems, mergedUsedItems, newLoc);
// 6. If not empty, store content somewhere
if (mergedItems.size > 0) {
this.content[newLoc] = new PackContent(
mergedItems,
mergedUsedItems,
memoize(async () => {
/** @type {Map<string, any>} */
const map = new Map();
await Promise.all(addToMergedMap.map(fn => fn(map)));
return new PackContentItems(map);
})
);
this.logger.log(
"Merged %d small files with %d cache items into pack %d",
mergedContent.length,
mergedItems.size,
newLoc
);
}
}
/**
* Split large content files with used and unused items
* into two parts to separate used from unused items
*/
_optimizeUnusedContent() {
// 1. Find a large content file with used and unused items
for (let i = 0; i < this.content.length; i++) {
const content = this.content[i];
if (content === undefined) continue;
const size = content.getSize();
if (size < MIN_CONTENT_SIZE) continue;
const used = content.used.size;
const total = content.items.size;
if (used > 0 && used < total) {
// 2. Remove this content
this.content[i] = undefined;
// 3. Determine items for the used content file
const usedItems = new Set(content.used);
const newLoc = this._findLocation();
this._gcAndUpdateLocation(usedItems, usedItems, newLoc);
// 4. Create content file for used items
if (usedItems.size > 0) {
this.content[newLoc] = new PackContent(
usedItems,
new Set(usedItems),
async () => {
await content.unpack();
const map = new Map();
for (const identifier of usedItems) {
map.set(identifier, content.content.get(identifier));
}
return new PackContentItems(map);
}
);
}
// 5. Determine items for the unused content file
const unusedItems = new Set(content.items);
const usedOfUnusedItems = new Set();
for (const identifier of usedItems) {
unusedItems.delete(identifier);
}
const newUnusedLoc = this._findLocation();
this._gcAndUpdateLocation(unusedItems, usedOfUnusedItems, newUnusedLoc);
// 6. Create content file for unused items
if (unusedItems.size > 0) {
this.content[newUnusedLoc] = new PackContent(
unusedItems,
usedOfUnusedItems,
async () => {
await content.unpack();
const map = new Map();
for (const identifier of unusedItems) {
map.set(identifier, content.content.get(identifier));
}
return new PackContentItems(map);
}
);
}
this.logger.log(
"Split pack %d into pack %d with %d used items and pack %d with %d unused items",
i,
newLoc,
usedItems.size,
newUnusedLoc,
unusedItems.size
);
// optimizing only one of them is good enough and
// reduces the amount of serialization needed
return;
}
}
}
/**
* Find the content with the oldest item and run GC on that.
* Only runs for one content to avoid large invalidation.
*/
_gcOldestContent() {
/** @type {PackItemInfo} */
let oldest = undefined;
for (const info of this.itemInfo.values()) {
if (oldest === undefined || info.lastAccess < oldest.lastAccess) {
oldest = info;
}
}
if (Date.now() - oldest.lastAccess > this.maxAge) {
const loc = oldest.location;
if (loc < 0) return;
const content = this.content[loc];
const items = new Set(content.items);
const usedItems = new Set(content.used);
this._gcAndUpdateLocation(items, usedItems, loc);
this.content[loc] =
items.size > 0
? new PackContent(items, usedItems, async () => {
await content.unpack();
const map = new Map();
for (const identifier of items) {
map.set(identifier, content.content.get(identifier));
}
return new PackContentItems(map);
})
: undefined;
}
}
serialize({ write, writeSeparate }) {
this._persistFreshContent();
this._optimizeSmallContent();
this._optimizeUnusedContent();
this._gcOldestContent();
for (const identifier of this.itemInfo.keys()) {
write(identifier);
}
write(null); // null as marker of the end of keys
for (const info of this.itemInfo.values()) {
write(info.etag);
}
for (const info of this.itemInfo.values()) {
write(info.lastAccess);
}
for (let i = 0; i < this.content.length; i++) {
const content = this.content[i];
if (content !== undefined) {
write(content.items);
writeSeparate(content.getLazyContentItems(), { name: `${i}` });
} else {
write(undefined); // undefined marks an empty content slot
}
}
write(null); // null as marker of the end of items
}
deserialize({ read, logger }) {
this.logger = logger;
{
const items = [];
let item = read();
while (item !== null) {
items.push(item);
item = read();
}
this.itemInfo.clear();
const infoItems = items.map(identifier => {
const info = new PackItemInfo(identifier, undefined, undefined);
this.itemInfo.set(identifier, info);
return info;
});
for (const info of infoItems) {
info.etag = read();
}
for (const info of infoItems) {
info.lastAccess = read();
}
}
this.content.length = 0;
let items = read();
while (items !== null) {
if (items === undefined) {
this.content.push(items);
} else {
const idx = this.content.length;
const lazy = read();
this.content.push(
new PackContent(
items,
new Set(),
lazy,
logger,
`${this.content.length}`
)
);
for (const identifier of items) {
this.itemInfo.get(identifier).location = idx;
}
}
items = read();
}
}
}
makeSerializable(Pack, "webpack/lib/cache/PackFileCacheStrategy", "Pack");
class PackContentItems {
/**
* @param {Map<string, any>} map items
*/
constructor(map) {
this.map = map;
}
serialize({ write, snapshot, rollback, logger, profile }) {
if (profile) {
write(false);
for (const [key, value] of this.map) {
const s = snapshot();
try {
write(key);
const start = process.hrtime();
write(value);
const durationHr = process.hrtime(start);
const duration = durationHr[0] * 1000 + durationHr[1] / 1e6;
if (duration > 1) {
if (duration > 500)
logger.error(`Serialization of '${key}': ${duration} ms`);
else if (duration > 50)
logger.warn(`Serialization of '${key}': ${duration} ms`);
else if (duration > 10)
logger.info(`Serialization of '${key}': ${duration} ms`);
else if (duration > 5)
logger.log(`Serialization of '${key}': ${duration} ms`);
else logger.debug(`Serialization of '${key}': ${duration} ms`);
}
} catch (e) {
rollback(s);
if (e === NOT_SERIALIZABLE) continue;
logger.warn(
`Skipped not serializable cache item '${key}': ${e.message}`
);
logger.debug(e.stack);
}
}
write(null);
return;
}
// Try to serialize all at once
const s = snapshot();
try {
write(true);
write(this.map);
} catch (e) {
rollback(s);
// Try to serialize each item on it's own
write(false);
for (const [key, value] of this.map) {
const s = snapshot();
try {
write(key);
write(value);
} catch (e) {
rollback(s);
if (e === NOT_SERIALIZABLE) continue;
logger.warn(
`Skipped not serializable cache item '${key}': ${e.message}`
);
logger.debug(e.stack);
}
}
write(null);
}
}
deserialize({ read, logger, profile }) {
if (read()) {
this.map = read();
} else if (profile) {
const map = new Map();
let key = read();
while (key !== null) {
const start = process.hrtime();
const value = read();
const durationHr = process.hrtime(start);
const duration = durationHr[0] * 1000 + durationHr[1] / 1e6;
if (duration > 1) {
if (duration > 100)
logger.error(`Deserialization of '${key}': ${duration} ms`);
else if (duration > 20)
logger.warn(`Deserialization of '${key}': ${duration} ms`);
else if (duration > 5)
logger.info(`Deserialization of '${key}': ${duration} ms`);
else if (duration > 2)
logger.log(`Deserialization of '${key}': ${duration} ms`);
else logger.debug(`Deserialization of '${key}': ${duration} ms`);
}
map.set(key, value);
key = read();
}
this.map = map;
} else {
const map = new Map();
let key = read();
while (key !== null) {
map.set(key, read());
key = read();
}
this.map = map;
}
}
}
makeSerializable(
PackContentItems,
"webpack/lib/cache/PackFileCacheStrategy",
"PackContentItems"
);
class PackContent {
/**
* @param {Set<string>} items keys
* @param {Set<string>} usedItems used keys
* @param {PackContentItems | function(): Promise<PackContentItems>} dataOrFn sync or async content
* @param {Logger=} logger logger for logging
* @param {string=} lazyName name of dataOrFn for logging
*/
constructor(items, usedItems, dataOrFn, logger, lazyName) {
this.items = items;
/** @type {function(): Promise<PackContentItems> | PackContentItems } */
this.lazy = typeof dataOrFn === "function" ? dataOrFn : undefined;
/** @type {Map<string, any>} */
this.content = typeof dataOrFn === "function" ? undefined : dataOrFn.map;
this.outdated = false;
this.used = usedItems;
this.logger = logger;
this.lazyName = lazyName;
}
get(identifier) {
this.used.add(identifier);
if (this.content) {
return this.content.get(identifier);
}
const { lazyName } = this;
let timeMessage;
if (lazyName) {
// only log once
this.lazyName = undefined;
timeMessage = `restore cache content ${lazyName} (${formatSize(
this.getSize()
)})`;
this.logger.log(
`starting to restore cache content ${lazyName} (${formatSize(
this.getSize()
)}) because of request to: ${identifier}`
);
this.logger.time(timeMessage);
}
const value = this.lazy();
if (value instanceof Promise) {
return value.then(data => {
const map = data.map;
if (timeMessage) {
this.logger.timeEnd(timeMessage);
}
this.content = map;
this.lazy = SerializerMiddleware.unMemoizeLazy(this.lazy);
return map.get(identifier);
});
} else {
const map = value.map;
if (timeMessage) {
this.logger.timeEnd(timeMessage);
}
this.content = map;
this.lazy = SerializerMiddleware.unMemoizeLazy(this.lazy);
return map.get(identifier);
}
}
/**
* @returns {void | Promise} maybe a promise if lazy
*/
unpack() {
if (this.content) return;
if (this.lazy) {
const { lazyName } = this;
let timeMessage;
if (lazyName) {
// only log once
this.lazyName = undefined;
timeMessage = `unpack cache content ${lazyName} (${formatSize(
this.getSize()
)})`;
this.logger.time(timeMessage);
}
const value = this.lazy();
if (value instanceof Promise) {
return value.then(data => {
if (timeMessage) {
this.logger.timeEnd(timeMessage);
}
this.content = data.map;
});
} else {
if (timeMessage) {
this.logger.timeEnd(timeMessage);
}
this.content = value.map;
}
}
}
/**
* @returns {number} size of the content or -1 if not known
*/
getSize() {
if (!this.lazy) return -1;
const options = /** @type {any} */ (this.lazy).options;
if (!options) return -1;
const size = options.size;
if (typeof size !== "number") return -1;
return size;
}
delete(identifier) {
this.items.delete(identifier);
this.used.delete(identifier);
this.outdated = true;
}
/**
* @returns {function(): PackContentItems | Promise<PackContentItems>} lazy content items
*/
getLazyContentItems() {
if (!this.outdated && this.lazy) return this.lazy;
if (!this.outdated && this.content) {
const map = new Map(this.content);
return (this.lazy = memoize(() => new PackContentItems(map)));
}
this.outdated = false;
if (this.content) {
return (this.lazy = memoize(() => {
/** @type {Map<string, any>} */
const map = new Map();
for (const item of this.items) {
map.set(item, this.content.get(item));
}
return new PackContentItems(map);
}));
}
const lazy = this.lazy;
return (this.lazy = () => {
const value = lazy();
if (value instanceof Promise) {
return value.then(data => {
const oldMap = data.map;
/** @type {Map<string, any>} */
const map = new Map();
for (const item of this.items) {
map.set(item, oldMap.get(item));
}
return new PackContentItems(map);
});
} else {
const oldMap = value.map;
/** @type {Map<string, any>} */
const map = new Map();
for (const item of this.items) {
map.set(item, oldMap.get(item));
}
return new PackContentItems(map);
}
});
}
}
const allowCollectingMemory = buf => {
const wasted = buf.buffer.byteLength - buf.byteLength;
if (wasted > 8192 && (wasted > 1048576 || wasted > buf.byteLength)) {
return Buffer.from(buf);
}
return buf;
};
class PackFileCacheStrategy {
/**
* @param {Object} options options
* @param {Compiler} options.compiler the compiler
* @param {IntermediateFileSystem} options.fs the filesystem
* @param {string} options.context the context directory
* @param {string} options.cacheLocation the location of the cache data
* @param {string} options.version version identifier
* @param {Logger} options.logger a logger
* @param {SnapshotOptions} options.snapshot options regarding snapshotting
* @param {number} options.maxAge max age of cache items
* @param {boolean} options.profile track and log detailed timing information for individual cache items
* @param {boolean} options.allowCollectingMemory allow to collect unused memory created during deserialization
* @param {false | "gzip" | "brotli"} options.compression compression used
*/
constructor({
compiler,
fs,
context,
cacheLocation,
version,
logger,
snapshot,
maxAge,
profile,
allowCollectingMemory,
compression
}) {
this.fileSerializer = createFileSerializer(fs);
this.fileSystemInfo = new FileSystemInfo(fs, {
managedPaths: snapshot.managedPaths,
immutablePaths: snapshot.immutablePaths,
logger: logger.getChildLogger("webpack.FileSystemInfo")
});
this.compiler = compiler;
this.context = context;
this.cacheLocation = cacheLocation;
this.version = version;
this.logger = logger;
this.maxAge = maxAge;
this.profile = profile;
this.allowCollectingMemory = allowCollectingMemory;
this.compression = compression;
this._extension =
compression === "brotli"
? ".pack.br"
: compression === "gzip"
? ".pack.gz"
: ".pack";
this.snapshot = snapshot;
/** @type {Set<string>} */
this.buildDependencies = new Set();
/** @type {LazySet<string>} */
this.newBuildDependencies = new LazySet();
/** @type {Snapshot} */
this.resolveBuildDependenciesSnapshot = undefined;
/** @type {Map<string, string | false>} */
this.resolveResults = undefined;
/** @type {Snapshot} */
this.buildSnapshot = undefined;
/** @type {Promise<Pack>} */
this.packPromise = this._openPack();
this.storePromise = Promise.resolve();
}
_getPack() {
if (this.packPromise === undefined) {
this.packPromise = this.storePromise.then(() => this._openPack());
}
return this.packPromise;
}
/**
* @returns {Promise<Pack>} the pack
*/
_openPack() {
const { logger, profile, cacheLocation, version } = this;
/** @type {Snapshot} */
let buildSnapshot;
/** @type {Set<string>} */
let buildDependencies;
/** @type {Set<string>} */
let newBuildDependencies;
/** @type {Snapshot} */
let resolveBuildDependenciesSnapshot;
/** @type {Map<string, string | false>} */
let resolveResults;
logger.time("restore cache container");
return this.fileSerializer
.deserialize(null, {
filename: `${cacheLocation}/index${this._extension}`,
extension: `${this._extension}`,
logger,
profile,
retainedBuffer: this.allowCollectingMemory
? allowCollectingMemory
: undefined
})
.catch(err => {
if (err.code !== "ENOENT") {
logger.warn(
`Restoring pack failed from ${cacheLocation}${this._extension}: ${err}`
);
logger.debug(err.stack);
} else {
logger.debug(
`No pack exists at ${cacheLocation}${this._extension}: ${err}`
);
}
return undefined;
})
.then(packContainer => {
logger.timeEnd("restore cache container");
if (!packContainer) return undefined;
if (!(packContainer instanceof PackContainer)) {
logger.warn(
`Restored pack from ${cacheLocation}${this._extension}, but contained content is unexpected.`,
packContainer
);
return undefined;
}
if (packContainer.version !== version) {
logger.log(
`Restored pack from ${cacheLocation}${this._extension}, but version doesn't match.`
);
return undefined;
}
logger.time("check build dependencies");
return Promise.all([
new Promise((resolve, reject) => {
this.fileSystemInfo.checkSnapshotValid(
packContainer.buildSnapshot,
(err, valid) => {
if (err) {
logger.log(
`Restored pack from ${cacheLocation}${this._extension}, but checking snapshot of build dependencies errored: ${err}.`
);
logger.debug(err.stack);
return resolve(false);
}
if (!valid) {
logger.log(
`Restored pack from ${cacheLocation}${this._extension}, but build dependencies have changed.`
);
return resolve(false);
}
buildSnapshot = packContainer.buildSnapshot;
return resolve(true);
}
);
}),
new Promise((resolve, reject) => {
this.fileSystemInfo.checkSnapshotValid(
packContainer.resolveBuildDependenciesSnapshot,
(err, valid) => {
if (err) {
logger.log(
`Restored pack from ${cacheLocation}${this._extension}, but checking snapshot of resolving of build dependencies errored: ${err}.`
);
logger.debug(err.stack);
return resolve(false);
}
if (valid) {
resolveBuildDependenciesSnapshot =
packContainer.resolveBuildDependenciesSnapshot;
buildDependencies = packContainer.buildDependencies;
resolveResults = packContainer.resolveResults;
return resolve(true);
}
logger.log(
"resolving of build dependencies is invalid, will re-resolve build dependencies"
);
this.fileSystemInfo.checkResolveResultsValid(
packContainer.resolveResults,
(err, valid) => {
if (err) {
logger.log(
`Restored pack from ${cacheLocation}${this._extension}, but resolving of build dependencies errored: ${err}.`
);
logger.debug(err.stack);
return resolve(false);
}
if (valid) {
newBuildDependencies = packContainer.buildDependencies;
resolveResults = packContainer.resolveResults;
return resolve(true);
}
logger.log(
`Restored pack from ${cacheLocation}${this._extension}, but build dependencies resolve to different locations.`
);
return resolve(false);
}
);
}
);
})
])
.catch(err => {
logger.timeEnd("check build dependencies");
throw err;
})
.then(([buildSnapshotValid, resolveValid]) => {
logger.timeEnd("check build dependencies");
if (buildSnapshotValid && resolveValid) {
logger.time("restore cache content metadata");
const d = packContainer.data();
logger.timeEnd("restore cache content metadata");
return d;
}
return undefined;
});
})
.then(pack => {
if (pack) {
pack.maxAge = this.maxAge;
this.buildSnapshot = buildSnapshot;
if (buildDependencies) this.buildDependencies = buildDependencies;
if (newBuildDependencies)
this.newBuildDependencies.addAll(newBuildDependencies);
this.resolveResults = resolveResults;
this.resolveBuildDependenciesSnapshot =
resolveBuildDependenciesSnapshot;
return pack;
}
return new Pack(logger, this.maxAge);
})
.catch(err => {
this.logger.warn(
`Restoring pack from ${cacheLocation}${this._extension} failed: ${err}`
);
this.logger.debug(err.stack);
return new Pack(logger, this.maxAge);
});
}
/**
* @param {string} identifier unique name for the resource
* @param {Etag | null} etag etag of the resource
* @param {any} data cached content
* @returns {Promise<void>} promise
*/
store(identifier, etag, data) {
return this._getPack().then(pack => {
pack.set(identifier, etag === null ? null : etag.toString(), data);
});
}
/**
* @param {string} identifier unique name for the resource
* @param {Etag | null} etag etag of the resource
* @returns {Promise<any>} promise to the cached content
*/
restore(identifier, etag) {
return this._getPack()
.then(pack =>
pack.get(identifier, etag === null ? null : etag.toString())
)
.catch(err => {
if (err && err.code !== "ENOENT") {
this.logger.warn(
`Restoring failed for ${identifier} from pack: ${err}`
);
this.logger.debug(err.stack);
}
});
}
storeBuildDependencies(dependencies) {
this.newBuildDependencies.addAll(dependencies);
}
afterAllStored() {
const packPromise = this.packPromise;
if (packPromise === undefined) return Promise.resolve();
const reportProgress = ProgressPlugin.getReporter(this.compiler);
this.packPromise = undefined;
return (this.storePromise = packPromise
.then(pack => {
if (!pack.invalid) return;
this.logger.log(`Storing pack...`);
let promise;
const newBuildDependencies = new Set();
for (const dep of this.newBuildDependencies) {
if (!this.buildDependencies.has(dep)) {
newBuildDependencies.add(dep);
}
}
if (newBuildDependencies.size > 0 || !this.buildSnapshot) {
if (reportProgress) reportProgress(0.5, "resolve build dependencies");
this.logger.debug(
`Capturing build dependencies... (${Array.from(
newBuildDependencies
).join(", ")})`
);
promise = new Promise((resolve, reject) => {
this.logger.time("resolve build dependencies");
this.fileSystemInfo.resolveBuildDependencies(
this.context,
newBuildDependencies,
(err, result) => {
this.logger.timeEnd("resolve build dependencies");
if (err) return reject(err);
this.logger.time("snapshot build dependencies");
const {
files,
directories,
missing,
resolveResults,
resolveDependencies
} = result;
if (this.resolveResults) {
for (const [key, value] of resolveResults) {
this.resolveResults.set(key, value);
}
} else {
this.resolveResults = resolveResults;
}
if (reportProgress) {
reportProgress(
0.6,
"snapshot build dependencies",
"resolving"
);
}
this.fileSystemInfo.createSnapshot(
undefined,
resolveDependencies.files,
resolveDependencies.directories,
resolveDependencies.missing,
this.snapshot.resolveBuildDependencies,
(err, snapshot) => {
if (err) {
this.logger.timeEnd("snapshot build dependencies");
return reject(err);
}
if (!snapshot) {
this.logger.timeEnd("snapshot build dependencies");
return reject(
new Error("Unable to snapshot resolve dependencies")
);
}
if (this.resolveBuildDependenciesSnapshot) {
this.resolveBuildDependenciesSnapshot =
this.fileSystemInfo.mergeSnapshots(
this.resolveBuildDependenciesSnapshot,
snapshot
);
} else {
this.resolveBuildDependenciesSnapshot = snapshot;
}
if (reportProgress) {
reportProgress(
0.7,
"snapshot build dependencies",
"modules"
);
}
this.fileSystemInfo.createSnapshot(
undefined,
files,
directories,
missing,
this.snapshot.buildDependencies,
(err, snapshot) => {
this.logger.timeEnd("snapshot build dependencies");
if (err) return reject(err);
if (!snapshot) {
return reject(
new Error("Unable to snapshot build dependencies")
);
}
this.logger.debug("Captured build dependencies");
if (this.buildSnapshot) {
this.buildSnapshot =
this.fileSystemInfo.mergeSnapshots(
this.buildSnapshot,
snapshot
);
} else {
this.buildSnapshot = snapshot;
}
resolve();
}
);
}
);
}
);
});
} else {
promise = Promise.resolve();
}
return promise.then(() => {
if (reportProgress) reportProgress(0.8, "serialize pack");
this.logger.time(`store pack`);
const updatedBuildDependencies = new Set(this.buildDependencies);
for (const dep of newBuildDependencies) {
updatedBuildDependencies.add(dep);
}
const content = new PackContainer(
pack,
this.version,
this.buildSnapshot,
updatedBuildDependencies,
this.resolveResults,
this.resolveBuildDependenciesSnapshot
);
return this.fileSerializer
.serialize(content, {
filename: `${this.cacheLocation}/index${this._extension}`,
extension: `${this._extension}`,
logger: this.logger,
profile: this.profile
})
.then(() => {
for (const dep of newBuildDependencies) {
this.buildDependencies.add(dep);
}
this.newBuildDependencies.clear();
this.logger.timeEnd(`store pack`);
const stats = pack.getContentStats();
this.logger.log(
"Stored pack (%d items, %d files, %d MiB)",
pack.itemInfo.size,
stats.count,
Math.round(stats.size / 1024 / 1024)
);
})
.catch(err => {
this.logger.timeEnd(`store pack`);
this.logger.warn(`Caching failed for pack: ${err}`);
this.logger.debug(err.stack);
});
});
})
.catch(err => {
this.logger.warn(`Caching failed for pack: ${err}`);
this.logger.debug(err.stack);
}));
}
clear() {
this.fileSystemInfo.clear();
this.buildDependencies.clear();
this.newBuildDependencies.clear();
this.resolveBuildDependenciesSnapshot = undefined;
this.resolveResults = undefined;
this.buildSnapshot = undefined;
this.packPromise = undefined;
}
}
module.exports = PackFileCacheStrategy;