mirror of https://github.com/webpack/webpack.git
408 lines
12 KiB
JavaScript
408 lines
12 KiB
JavaScript
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
Author Tobias Koppers @sokra
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const asyncLib = require("neo-async");
|
|
const Queue = require("./util/Queue");
|
|
|
|
/** @typedef {import("./Compiler")} Compiler */
|
|
/** @typedef {import("./DependenciesBlock")} DependenciesBlock */
|
|
/** @typedef {import("./Dependency")} Dependency */
|
|
/** @typedef {import("./Dependency").ExportSpec} ExportSpec */
|
|
/** @typedef {import("./Dependency").ExportsSpec} ExportsSpec */
|
|
/** @typedef {import("./ExportsInfo")} ExportsInfo */
|
|
/** @typedef {import("./Module")} Module */
|
|
|
|
class FlagDependencyExportsPlugin {
|
|
/**
|
|
* Apply the plugin
|
|
* @param {Compiler} compiler the compiler instance
|
|
* @returns {void}
|
|
*/
|
|
apply(compiler) {
|
|
compiler.hooks.compilation.tap(
|
|
"FlagDependencyExportsPlugin",
|
|
compilation => {
|
|
const moduleGraph = compilation.moduleGraph;
|
|
const cache = compilation.getCache("FlagDependencyExportsPlugin");
|
|
compilation.hooks.finishModules.tapAsync(
|
|
"FlagDependencyExportsPlugin",
|
|
(modules, callback) => {
|
|
const logger = compilation.getLogger(
|
|
"webpack.FlagDependencyExportsPlugin"
|
|
);
|
|
let statRestoredFromCache = 0;
|
|
let statNoExports = 0;
|
|
let statFlaggedUncached = 0;
|
|
let statNotCached = 0;
|
|
let statQueueItemsProcessed = 0;
|
|
|
|
/** @type {Queue<Module>} */
|
|
const queue = new Queue();
|
|
|
|
// Step 1: Try to restore cached provided export info from cache
|
|
logger.time("restore cached provided exports");
|
|
asyncLib.each(
|
|
modules,
|
|
(module, callback) => {
|
|
const exportsInfo = moduleGraph.getExportsInfo(module);
|
|
if (!module.buildMeta || !module.buildMeta.exportsType) {
|
|
if (exportsInfo.otherExportsInfo.provided !== null) {
|
|
// It's a module without declared exports
|
|
statNoExports++;
|
|
exportsInfo.setHasProvideInfo();
|
|
exportsInfo.setUnknownExportsProvided();
|
|
return callback();
|
|
}
|
|
}
|
|
if (
|
|
module.buildInfo.cacheable !== true ||
|
|
typeof module.buildInfo.hash !== "string"
|
|
) {
|
|
statFlaggedUncached++;
|
|
// Enqueue uncacheable module for determining the exports
|
|
queue.enqueue(module);
|
|
exportsInfo.setHasProvideInfo();
|
|
return callback();
|
|
}
|
|
cache.get(
|
|
module.identifier(),
|
|
module.buildInfo.hash,
|
|
(err, result) => {
|
|
if (err) return callback(err);
|
|
|
|
if (result !== undefined) {
|
|
statRestoredFromCache++;
|
|
moduleGraph
|
|
.getExportsInfo(module)
|
|
.restoreProvided(result);
|
|
} else {
|
|
statNotCached++;
|
|
// Without cached info enqueue module for determining the exports
|
|
queue.enqueue(module);
|
|
exportsInfo.setHasProvideInfo();
|
|
}
|
|
callback();
|
|
}
|
|
);
|
|
},
|
|
err => {
|
|
logger.timeEnd("restore cached provided exports");
|
|
if (err) return callback(err);
|
|
|
|
/** @type {Set<Module>} */
|
|
const modulesToStore = new Set();
|
|
|
|
/** @type {Map<Module, Set<Module>>} */
|
|
const dependencies = new Map();
|
|
|
|
/** @type {Module} */
|
|
let module;
|
|
|
|
/** @type {ExportsInfo} */
|
|
let exportsInfo;
|
|
|
|
/** @type {Map<Dependency, ExportsSpec>} */
|
|
const exportsSpecsFromDependencies = new Map();
|
|
|
|
let cacheable = true;
|
|
let changed = false;
|
|
|
|
/**
|
|
* @param {DependenciesBlock} depBlock the dependencies block
|
|
* @returns {void}
|
|
*/
|
|
const processDependenciesBlock = depBlock => {
|
|
for (const dep of depBlock.dependencies) {
|
|
processDependency(dep);
|
|
}
|
|
for (const block of depBlock.blocks) {
|
|
processDependenciesBlock(block);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* @param {Dependency} dep the dependency
|
|
* @returns {void}
|
|
*/
|
|
const processDependency = dep => {
|
|
const exportDesc = dep.getExports(moduleGraph);
|
|
if (!exportDesc) return;
|
|
exportsSpecsFromDependencies.set(dep, exportDesc);
|
|
};
|
|
|
|
/**
|
|
* @param {Dependency} dep dependency
|
|
* @param {ExportsSpec} exportDesc info
|
|
* @returns {void}
|
|
*/
|
|
const processExportsSpec = (dep, exportDesc) => {
|
|
const exports = exportDesc.exports;
|
|
const globalCanMangle = exportDesc.canMangle;
|
|
const globalFrom = exportDesc.from;
|
|
const globalPriority = exportDesc.priority;
|
|
const globalTerminalBinding =
|
|
exportDesc.terminalBinding || false;
|
|
const exportDeps = exportDesc.dependencies;
|
|
if (exportDesc.hideExports) {
|
|
for (const name of exportDesc.hideExports) {
|
|
const exportInfo = exportsInfo.getExportInfo(name);
|
|
exportInfo.unsetTarget(dep);
|
|
}
|
|
}
|
|
if (exports === true) {
|
|
// unknown exports
|
|
if (
|
|
exportsInfo.setUnknownExportsProvided(
|
|
globalCanMangle,
|
|
exportDesc.excludeExports,
|
|
globalFrom && dep,
|
|
globalFrom,
|
|
globalPriority
|
|
)
|
|
) {
|
|
changed = true;
|
|
}
|
|
} else if (Array.isArray(exports)) {
|
|
/**
|
|
* merge in new exports
|
|
* @param {ExportsInfo} exportsInfo own exports info
|
|
* @param {(ExportSpec | string)[]} exports list of exports
|
|
*/
|
|
const mergeExports = (exportsInfo, exports) => {
|
|
for (const exportNameOrSpec of exports) {
|
|
let name;
|
|
let canMangle = globalCanMangle;
|
|
let terminalBinding = globalTerminalBinding;
|
|
let exports = undefined;
|
|
let from = globalFrom;
|
|
let fromExport = undefined;
|
|
let priority = globalPriority;
|
|
let hidden = false;
|
|
if (typeof exportNameOrSpec === "string") {
|
|
name = exportNameOrSpec;
|
|
} else {
|
|
name = exportNameOrSpec.name;
|
|
if (exportNameOrSpec.canMangle !== undefined)
|
|
canMangle = exportNameOrSpec.canMangle;
|
|
if (exportNameOrSpec.export !== undefined)
|
|
fromExport = exportNameOrSpec.export;
|
|
if (exportNameOrSpec.exports !== undefined)
|
|
exports = exportNameOrSpec.exports;
|
|
if (exportNameOrSpec.from !== undefined)
|
|
from = exportNameOrSpec.from;
|
|
if (exportNameOrSpec.priority !== undefined)
|
|
priority = exportNameOrSpec.priority;
|
|
if (exportNameOrSpec.terminalBinding !== undefined)
|
|
terminalBinding = exportNameOrSpec.terminalBinding;
|
|
if (exportNameOrSpec.hidden !== undefined)
|
|
hidden = exportNameOrSpec.hidden;
|
|
}
|
|
const exportInfo = exportsInfo.getExportInfo(name);
|
|
|
|
if (
|
|
exportInfo.provided === false ||
|
|
exportInfo.provided === null
|
|
) {
|
|
exportInfo.provided = true;
|
|
changed = true;
|
|
}
|
|
|
|
if (
|
|
exportInfo.canMangleProvide !== false &&
|
|
canMangle === false
|
|
) {
|
|
exportInfo.canMangleProvide = false;
|
|
changed = true;
|
|
}
|
|
|
|
if (terminalBinding && !exportInfo.terminalBinding) {
|
|
exportInfo.terminalBinding = true;
|
|
changed = true;
|
|
}
|
|
|
|
if (exports) {
|
|
const nestedExportsInfo = exportInfo.createNestedExportsInfo();
|
|
mergeExports(nestedExportsInfo, exports);
|
|
}
|
|
|
|
if (
|
|
from &&
|
|
(hidden
|
|
? exportInfo.unsetTarget(dep)
|
|
: exportInfo.setTarget(
|
|
dep,
|
|
from,
|
|
fromExport === undefined ? [name] : fromExport,
|
|
priority
|
|
))
|
|
) {
|
|
changed = true;
|
|
}
|
|
|
|
// Recalculate target exportsInfo
|
|
const target = exportInfo.getTarget(moduleGraph);
|
|
let targetExportsInfo = undefined;
|
|
if (target) {
|
|
const targetModuleExportsInfo = moduleGraph.getExportsInfo(
|
|
target.module
|
|
);
|
|
targetExportsInfo = targetModuleExportsInfo.getNestedExportsInfo(
|
|
target.export
|
|
);
|
|
// add dependency for this module
|
|
const set = dependencies.get(target.module);
|
|
if (set === undefined) {
|
|
dependencies.set(target.module, new Set([module]));
|
|
} else {
|
|
set.add(module);
|
|
}
|
|
}
|
|
|
|
if (exportInfo.exportsInfoOwned) {
|
|
if (
|
|
exportInfo.exportsInfo.setRedirectNamedTo(
|
|
targetExportsInfo
|
|
)
|
|
) {
|
|
changed = true;
|
|
}
|
|
} else if (
|
|
exportInfo.exportsInfo !== targetExportsInfo
|
|
) {
|
|
exportInfo.exportsInfo = targetExportsInfo;
|
|
changed = true;
|
|
}
|
|
}
|
|
};
|
|
mergeExports(exportsInfo, exports);
|
|
}
|
|
// store dependencies
|
|
if (exportDeps) {
|
|
cacheable = false;
|
|
for (const exportDependency of exportDeps) {
|
|
// add dependency for this module
|
|
const set = dependencies.get(exportDependency);
|
|
if (set === undefined) {
|
|
dependencies.set(exportDependency, new Set([module]));
|
|
} else {
|
|
set.add(module);
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
const notifyDependencies = () => {
|
|
const deps = dependencies.get(module);
|
|
if (deps !== undefined) {
|
|
for (const dep of deps) {
|
|
queue.enqueue(dep);
|
|
}
|
|
}
|
|
};
|
|
|
|
logger.time("figure out provided exports");
|
|
while (queue.length > 0) {
|
|
module = queue.dequeue();
|
|
|
|
statQueueItemsProcessed++;
|
|
|
|
exportsInfo = moduleGraph.getExportsInfo(module);
|
|
|
|
cacheable = true;
|
|
changed = false;
|
|
|
|
exportsSpecsFromDependencies.clear();
|
|
moduleGraph.freeze();
|
|
processDependenciesBlock(module);
|
|
moduleGraph.unfreeze();
|
|
for (const [
|
|
dep,
|
|
exportsSpec
|
|
] of exportsSpecsFromDependencies) {
|
|
processExportsSpec(dep, exportsSpec);
|
|
}
|
|
|
|
if (cacheable) {
|
|
modulesToStore.add(module);
|
|
}
|
|
|
|
if (changed) {
|
|
notifyDependencies();
|
|
}
|
|
}
|
|
logger.timeEnd("figure out provided exports");
|
|
|
|
logger.log(
|
|
`${Math.round(
|
|
(100 * (statFlaggedUncached + statNotCached)) /
|
|
(statRestoredFromCache +
|
|
statNotCached +
|
|
statFlaggedUncached +
|
|
statNoExports)
|
|
)}% of exports of modules have been determined (${statNoExports} no declared exports, ${statNotCached} not cached, ${statFlaggedUncached} flagged uncacheable, ${statRestoredFromCache} from cache, ${
|
|
statQueueItemsProcessed -
|
|
statNotCached -
|
|
statFlaggedUncached
|
|
} additional calculations due to dependencies)`
|
|
);
|
|
|
|
logger.time("store provided exports into cache");
|
|
asyncLib.each(
|
|
modulesToStore,
|
|
(module, callback) => {
|
|
if (
|
|
module.buildInfo.cacheable !== true ||
|
|
typeof module.buildInfo.hash !== "string"
|
|
) {
|
|
// not cacheable
|
|
return callback();
|
|
}
|
|
cache.store(
|
|
module.identifier(),
|
|
module.buildInfo.hash,
|
|
moduleGraph
|
|
.getExportsInfo(module)
|
|
.getRestoreProvidedData(),
|
|
callback
|
|
);
|
|
},
|
|
err => {
|
|
logger.timeEnd("store provided exports into cache");
|
|
callback(err);
|
|
}
|
|
);
|
|
}
|
|
);
|
|
}
|
|
);
|
|
|
|
/** @type {WeakMap<Module, any>} */
|
|
const providedExportsCache = new WeakMap();
|
|
compilation.hooks.rebuildModule.tap(
|
|
"FlagDependencyExportsPlugin",
|
|
module => {
|
|
providedExportsCache.set(
|
|
module,
|
|
moduleGraph.getExportsInfo(module).getRestoreProvidedData()
|
|
);
|
|
}
|
|
);
|
|
compilation.hooks.finishRebuildingModule.tap(
|
|
"FlagDependencyExportsPlugin",
|
|
module => {
|
|
moduleGraph
|
|
.getExportsInfo(module)
|
|
.restoreProvided(providedExportsCache.get(module));
|
|
}
|
|
);
|
|
}
|
|
);
|
|
}
|
|
}
|
|
|
|
module.exports = FlagDependencyExportsPlugin;
|