diff options
Diffstat (limited to 'node_modules/webpack/lib/optimize/ModuleConcatenationPlugin.js')
| -rw-r--r-- | node_modules/webpack/lib/optimize/ModuleConcatenationPlugin.js | 930 |
1 files changed, 930 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/optimize/ModuleConcatenationPlugin.js b/node_modules/webpack/lib/optimize/ModuleConcatenationPlugin.js new file mode 100644 index 00000000..49c145c6 --- /dev/null +++ b/node_modules/webpack/lib/optimize/ModuleConcatenationPlugin.js @@ -0,0 +1,930 @@ +/* + MIT License http://www.opensource.org/licenses/mit-license.php + Author Tobias Koppers @sokra +*/ + +"use strict"; + +const asyncLib = require("neo-async"); +const ChunkGraph = require("../ChunkGraph"); +const ModuleGraph = require("../ModuleGraph"); +const { STAGE_DEFAULT } = require("../OptimizationStages"); +const HarmonyImportDependency = require("../dependencies/HarmonyImportDependency"); +const { compareModulesByIdentifier } = require("../util/comparators"); +const { + intersectRuntime, + mergeRuntimeOwned, + filterRuntime, + runtimeToString, + mergeRuntime +} = require("../util/runtime"); +const ConcatenatedModule = require("./ConcatenatedModule"); + +/** @typedef {import("../Compilation")} Compilation */ +/** @typedef {import("../Compiler")} Compiler */ +/** @typedef {import("../Module")} Module */ +/** @typedef {import("../Module").BuildInfo} BuildInfo */ +/** @typedef {import("../RequestShortener")} RequestShortener */ +/** @typedef {import("../util/runtime").RuntimeSpec} RuntimeSpec */ + +/** + * @typedef {object} Statistics + * @property {number} cached + * @property {number} alreadyInConfig + * @property {number} invalidModule + * @property {number} incorrectChunks + * @property {number} incorrectDependency + * @property {number} incorrectModuleDependency + * @property {number} incorrectChunksOfImporter + * @property {number} incorrectRuntimeCondition + * @property {number} importerFailed + * @property {number} added + */ + +/** + * @param {string} msg message + * @returns {string} formatted message + */ +const formatBailoutReason = msg => `ModuleConcatenation bailout: ${msg}`; + +class ModuleConcatenationPlugin { + /** + * Apply the plugin + * @param {Compiler} compiler the compiler instance + * @returns {void} + */ + apply(compiler) { + const { _backCompat: backCompat } = compiler; + compiler.hooks.compilation.tap("ModuleConcatenationPlugin", compilation => { + if (compilation.moduleMemCaches) { + throw new Error( + "optimization.concatenateModules can't be used with cacheUnaffected as module concatenation is a global effect" + ); + } + const moduleGraph = compilation.moduleGraph; + /** @type {Map<Module, string | ((requestShortener: RequestShortener) => string)>} */ + const bailoutReasonMap = new Map(); + + /** + * @param {Module} module the module + * @param {string | ((requestShortener: RequestShortener) => string)} reason the reason + */ + const setBailoutReason = (module, reason) => { + setInnerBailoutReason(module, reason); + moduleGraph + .getOptimizationBailout(module) + .push( + typeof reason === "function" + ? rs => formatBailoutReason(reason(rs)) + : formatBailoutReason(reason) + ); + }; + + /** + * @param {Module} module the module + * @param {string | ((requestShortener: RequestShortener) => string)} reason the reason + */ + const setInnerBailoutReason = (module, reason) => { + bailoutReasonMap.set(module, reason); + }; + + /** + * @param {Module} module the module + * @param {RequestShortener} requestShortener the request shortener + * @returns {string | ((requestShortener: RequestShortener) => string) | undefined} the reason + */ + const getInnerBailoutReason = (module, requestShortener) => { + const reason = bailoutReasonMap.get(module); + if (typeof reason === "function") return reason(requestShortener); + return reason; + }; + + /** + * @param {Module} module the module + * @param {Module | function(RequestShortener): string} problem the problem + * @returns {(requestShortener: RequestShortener) => string} the reason + */ + const formatBailoutWarning = (module, problem) => requestShortener => { + if (typeof problem === "function") { + return formatBailoutReason( + `Cannot concat with ${module.readableIdentifier( + requestShortener + )}: ${problem(requestShortener)}` + ); + } + const reason = getInnerBailoutReason(module, requestShortener); + const reasonWithPrefix = reason ? `: ${reason}` : ""; + if (module === problem) { + return formatBailoutReason( + `Cannot concat with ${module.readableIdentifier( + requestShortener + )}${reasonWithPrefix}` + ); + } + return formatBailoutReason( + `Cannot concat with ${module.readableIdentifier( + requestShortener + )} because of ${problem.readableIdentifier( + requestShortener + )}${reasonWithPrefix}` + ); + }; + + compilation.hooks.optimizeChunkModules.tapAsync( + { + name: "ModuleConcatenationPlugin", + stage: STAGE_DEFAULT + }, + (allChunks, modules, callback) => { + const logger = compilation.getLogger( + "webpack.ModuleConcatenationPlugin" + ); + const { chunkGraph, moduleGraph } = compilation; + const relevantModules = []; + const possibleInners = new Set(); + const context = { + chunkGraph, + moduleGraph + }; + logger.time("select relevant modules"); + for (const module of modules) { + let canBeRoot = true; + let canBeInner = true; + + const bailoutReason = module.getConcatenationBailoutReason(context); + if (bailoutReason) { + setBailoutReason(module, bailoutReason); + continue; + } + + // Must not be an async module + if (moduleGraph.isAsync(module)) { + setBailoutReason(module, "Module is async"); + continue; + } + + // Must be in strict mode + if (!(/** @type {BuildInfo} */ (module.buildInfo).strict)) { + setBailoutReason(module, "Module is not in strict mode"); + continue; + } + + // Module must be in any chunk (we don't want to do useless work) + if (chunkGraph.getNumberOfModuleChunks(module) === 0) { + setBailoutReason(module, "Module is not in any chunk"); + continue; + } + + // Exports must be known (and not dynamic) + const exportsInfo = moduleGraph.getExportsInfo(module); + const relevantExports = exportsInfo.getRelevantExports(undefined); + const unknownReexports = relevantExports.filter( + exportInfo => + exportInfo.isReexport() && !exportInfo.getTarget(moduleGraph) + ); + if (unknownReexports.length > 0) { + setBailoutReason( + module, + `Reexports in this module do not have a static target (${Array.from( + unknownReexports, + exportInfo => + `${ + exportInfo.name || "other exports" + }: ${exportInfo.getUsedInfo()}` + ).join(", ")})` + ); + continue; + } + + // Root modules must have a static list of exports + const unknownProvidedExports = relevantExports.filter( + exportInfo => exportInfo.provided !== true + ); + if (unknownProvidedExports.length > 0) { + setBailoutReason( + module, + `List of module exports is dynamic (${Array.from( + unknownProvidedExports, + exportInfo => + `${ + exportInfo.name || "other exports" + }: ${exportInfo.getProvidedInfo()} and ${exportInfo.getUsedInfo()}` + ).join(", ")})` + ); + canBeRoot = false; + } + + // Module must not be an entry point + if (chunkGraph.isEntryModule(module)) { + setInnerBailoutReason(module, "Module is an entry point"); + canBeInner = false; + } + + if (canBeRoot) relevantModules.push(module); + if (canBeInner) possibleInners.add(module); + } + logger.timeEnd("select relevant modules"); + logger.debug( + `${relevantModules.length} potential root modules, ${possibleInners.size} potential inner modules` + ); + // sort by depth + // modules with lower depth are more likely suited as roots + // this improves performance, because modules already selected as inner are skipped + logger.time("sort relevant modules"); + relevantModules.sort( + (a, b) => + /** @type {number} */ (moduleGraph.getDepth(a)) - + /** @type {number} */ (moduleGraph.getDepth(b)) + ); + logger.timeEnd("sort relevant modules"); + + /** @type {Statistics} */ + const stats = { + cached: 0, + alreadyInConfig: 0, + invalidModule: 0, + incorrectChunks: 0, + incorrectDependency: 0, + incorrectModuleDependency: 0, + incorrectChunksOfImporter: 0, + incorrectRuntimeCondition: 0, + importerFailed: 0, + added: 0 + }; + let statsCandidates = 0; + let statsSizeSum = 0; + let statsEmptyConfigurations = 0; + + logger.time("find modules to concatenate"); + const concatConfigurations = []; + const usedAsInner = new Set(); + for (const currentRoot of relevantModules) { + // when used by another configuration as inner: + // the other configuration is better and we can skip this one + // TODO reconsider that when it's only used in a different runtime + if (usedAsInner.has(currentRoot)) continue; + + let chunkRuntime; + for (const r of chunkGraph.getModuleRuntimes(currentRoot)) { + chunkRuntime = mergeRuntimeOwned(chunkRuntime, r); + } + const exportsInfo = moduleGraph.getExportsInfo(currentRoot); + const filteredRuntime = filterRuntime(chunkRuntime, r => + exportsInfo.isModuleUsed(r) + ); + const activeRuntime = + filteredRuntime === true + ? chunkRuntime + : filteredRuntime === false + ? undefined + : filteredRuntime; + + // create a configuration with the root + const currentConfiguration = new ConcatConfiguration( + currentRoot, + activeRuntime + ); + + // cache failures to add modules + const failureCache = new Map(); + + // potential optional import candidates + /** @type {Set<Module>} */ + const candidates = new Set(); + + // try to add all imports + for (const imp of this._getImports( + compilation, + currentRoot, + activeRuntime + )) { + candidates.add(imp); + } + + for (const imp of candidates) { + const impCandidates = new Set(); + const problem = this._tryToAdd( + compilation, + currentConfiguration, + imp, + chunkRuntime, + activeRuntime, + possibleInners, + impCandidates, + failureCache, + chunkGraph, + true, + stats + ); + if (problem) { + failureCache.set(imp, problem); + currentConfiguration.addWarning(imp, problem); + } else { + for (const c of impCandidates) { + candidates.add(c); + } + } + } + statsCandidates += candidates.size; + if (!currentConfiguration.isEmpty()) { + const modules = currentConfiguration.getModules(); + statsSizeSum += modules.size; + concatConfigurations.push(currentConfiguration); + for (const module of modules) { + if (module !== currentConfiguration.rootModule) { + usedAsInner.add(module); + } + } + } else { + statsEmptyConfigurations++; + const optimizationBailouts = + moduleGraph.getOptimizationBailout(currentRoot); + for (const warning of currentConfiguration.getWarningsSorted()) { + optimizationBailouts.push( + formatBailoutWarning(warning[0], warning[1]) + ); + } + } + } + logger.timeEnd("find modules to concatenate"); + logger.debug( + `${ + concatConfigurations.length + } successful concat configurations (avg size: ${ + statsSizeSum / concatConfigurations.length + }), ${statsEmptyConfigurations} bailed out completely` + ); + logger.debug( + `${statsCandidates} candidates were considered for adding (${stats.cached} cached failure, ${stats.alreadyInConfig} already in config, ${stats.invalidModule} invalid module, ${stats.incorrectChunks} incorrect chunks, ${stats.incorrectDependency} incorrect dependency, ${stats.incorrectChunksOfImporter} incorrect chunks of importer, ${stats.incorrectModuleDependency} incorrect module dependency, ${stats.incorrectRuntimeCondition} incorrect runtime condition, ${stats.importerFailed} importer failed, ${stats.added} added)` + ); + // HACK: Sort configurations by length and start with the longest one + // to get the biggest groups possible. Used modules are marked with usedModules + // TODO: Allow to reuse existing configuration while trying to add dependencies. + // This would improve performance. O(n^2) -> O(n) + logger.time("sort concat configurations"); + concatConfigurations.sort((a, b) => b.modules.size - a.modules.size); + logger.timeEnd("sort concat configurations"); + const usedModules = new Set(); + + logger.time("create concatenated modules"); + asyncLib.each( + concatConfigurations, + (concatConfiguration, callback) => { + const rootModule = concatConfiguration.rootModule; + + // Avoid overlapping configurations + // TODO: remove this when todo above is fixed + if (usedModules.has(rootModule)) return callback(); + const modules = concatConfiguration.getModules(); + for (const m of modules) { + usedModules.add(m); + } + + // Create a new ConcatenatedModule + ConcatenatedModule.getCompilationHooks(compilation); + const newModule = ConcatenatedModule.create( + rootModule, + modules, + concatConfiguration.runtime, + compilation, + compiler.root, + compilation.outputOptions.hashFunction + ); + + const build = () => { + newModule.build( + compiler.options, + compilation, + null, + null, + err => { + if (err) { + if (!err.module) { + err.module = newModule; + } + return callback(err); + } + integrate(); + } + ); + }; + + const integrate = () => { + if (backCompat) { + ChunkGraph.setChunkGraphForModule(newModule, chunkGraph); + ModuleGraph.setModuleGraphForModule(newModule, moduleGraph); + } + + for (const warning of concatConfiguration.getWarningsSorted()) { + moduleGraph + .getOptimizationBailout(newModule) + .push(formatBailoutWarning(warning[0], warning[1])); + } + moduleGraph.cloneModuleAttributes(rootModule, newModule); + for (const m of modules) { + // add to builtModules when one of the included modules was built + if (compilation.builtModules.has(m)) { + compilation.builtModules.add(newModule); + } + if (m !== rootModule) { + // attach external references to the concatenated module too + moduleGraph.copyOutgoingModuleConnections( + m, + newModule, + c => + c.originModule === m && + !( + c.dependency instanceof HarmonyImportDependency && + modules.has(c.module) + ) + ); + // remove module from chunk + for (const chunk of chunkGraph.getModuleChunksIterable( + rootModule + )) { + const sourceTypes = chunkGraph.getChunkModuleSourceTypes( + chunk, + m + ); + if (sourceTypes.size === 1) { + chunkGraph.disconnectChunkAndModule(chunk, m); + } else { + const newSourceTypes = new Set(sourceTypes); + newSourceTypes.delete("javascript"); + chunkGraph.setChunkModuleSourceTypes( + chunk, + m, + newSourceTypes + ); + } + } + } + } + compilation.modules.delete(rootModule); + ChunkGraph.clearChunkGraphForModule(rootModule); + ModuleGraph.clearModuleGraphForModule(rootModule); + + // remove module from chunk + chunkGraph.replaceModule(rootModule, newModule); + // replace module references with the concatenated module + moduleGraph.moveModuleConnections(rootModule, newModule, c => { + const otherModule = + c.module === rootModule ? c.originModule : c.module; + const innerConnection = + c.dependency instanceof HarmonyImportDependency && + modules.has(/** @type {Module} */ (otherModule)); + return !innerConnection; + }); + // add concatenated module to the compilation + compilation.modules.add(newModule); + + callback(); + }; + + build(); + }, + err => { + logger.timeEnd("create concatenated modules"); + process.nextTick(callback.bind(null, err)); + } + ); + } + ); + }); + } + + /** + * @param {Compilation} compilation the compilation + * @param {Module} module the module to be added + * @param {RuntimeSpec} runtime the runtime scope + * @returns {Set<Module>} the imported modules + */ + _getImports(compilation, module, runtime) { + const moduleGraph = compilation.moduleGraph; + const set = new Set(); + for (const dep of module.dependencies) { + // Get reference info only for harmony Dependencies + if (!(dep instanceof HarmonyImportDependency)) continue; + + const connection = moduleGraph.getConnection(dep); + // Reference is valid and has a module + if ( + !connection || + !connection.module || + !connection.isTargetActive(runtime) + ) { + continue; + } + + const importedNames = compilation.getDependencyReferencedExports( + dep, + undefined + ); + + if ( + importedNames.every(i => + Array.isArray(i) ? i.length > 0 : i.name.length > 0 + ) || + Array.isArray(moduleGraph.getProvidedExports(module)) + ) { + set.add(connection.module); + } + } + return set; + } + + /** + * @param {Compilation} compilation webpack compilation + * @param {ConcatConfiguration} config concat configuration (will be modified when added) + * @param {Module} module the module to be added + * @param {RuntimeSpec} runtime the runtime scope of the generated code + * @param {RuntimeSpec} activeRuntime the runtime scope of the root module + * @param {Set<Module>} possibleModules modules that are candidates + * @param {Set<Module>} candidates list of potential candidates (will be added to) + * @param {Map<Module, Module | function(RequestShortener): string>} failureCache cache for problematic modules to be more performant + * @param {ChunkGraph} chunkGraph the chunk graph + * @param {boolean} avoidMutateOnFailure avoid mutating the config when adding fails + * @param {Statistics} statistics gathering metrics + * @returns {null | Module | function(RequestShortener): string} the problematic module + */ + _tryToAdd( + compilation, + config, + module, + runtime, + activeRuntime, + possibleModules, + candidates, + failureCache, + chunkGraph, + avoidMutateOnFailure, + statistics + ) { + const cacheEntry = failureCache.get(module); + if (cacheEntry) { + statistics.cached++; + return cacheEntry; + } + + // Already added? + if (config.has(module)) { + statistics.alreadyInConfig++; + return null; + } + + // Not possible to add? + if (!possibleModules.has(module)) { + statistics.invalidModule++; + failureCache.set(module, module); // cache failures for performance + return module; + } + + // Module must be in the correct chunks + const missingChunks = Array.from( + chunkGraph.getModuleChunksIterable(config.rootModule) + ).filter(chunk => !chunkGraph.isModuleInChunk(module, chunk)); + if (missingChunks.length > 0) { + /** + * @param {RequestShortener} requestShortener request shortener + * @returns {string} problem description + */ + const problem = requestShortener => { + const missingChunksList = Array.from( + new Set(missingChunks.map(chunk => chunk.name || "unnamed chunk(s)")) + ).sort(); + const chunks = Array.from( + new Set( + Array.from(chunkGraph.getModuleChunksIterable(module)).map( + chunk => chunk.name || "unnamed chunk(s)" + ) + ) + ).sort(); + return `Module ${module.readableIdentifier( + requestShortener + )} is not in the same chunk(s) (expected in chunk(s) ${missingChunksList.join( + ", " + )}, module is in chunk(s) ${chunks.join(", ")})`; + }; + statistics.incorrectChunks++; + failureCache.set(module, problem); // cache failures for performance + return problem; + } + + const moduleGraph = compilation.moduleGraph; + + const incomingConnections = + moduleGraph.getIncomingConnectionsByOriginModule(module); + + const incomingConnectionsFromNonModules = + incomingConnections.get(null) || incomingConnections.get(undefined); + if (incomingConnectionsFromNonModules) { + const activeNonModulesConnections = + incomingConnectionsFromNonModules.filter(connection => + // We are not interested in inactive connections + // or connections without dependency + connection.isActive(runtime) + ); + if (activeNonModulesConnections.length > 0) { + /** + * @param {RequestShortener} requestShortener request shortener + * @returns {string} problem description + */ + const problem = requestShortener => { + const importingExplanations = new Set( + activeNonModulesConnections.map(c => c.explanation).filter(Boolean) + ); + const explanations = Array.from(importingExplanations).sort(); + return `Module ${module.readableIdentifier( + requestShortener + )} is referenced ${ + explanations.length > 0 + ? `by: ${explanations.join(", ")}` + : "in an unsupported way" + }`; + }; + statistics.incorrectDependency++; + failureCache.set(module, problem); // cache failures for performance + return problem; + } + } + + /** @type {Map<Module, readonly ModuleGraph.ModuleGraphConnection[]>} */ + const incomingConnectionsFromModules = new Map(); + for (const [originModule, connections] of incomingConnections) { + if (originModule) { + // Ignore connection from orphan modules + if (chunkGraph.getNumberOfModuleChunks(originModule) === 0) continue; + + // We don't care for connections from other runtimes + let originRuntime; + for (const r of chunkGraph.getModuleRuntimes(originModule)) { + originRuntime = mergeRuntimeOwned(originRuntime, r); + } + + if (!intersectRuntime(runtime, originRuntime)) continue; + + // We are not interested in inactive connections + const activeConnections = connections.filter(connection => + connection.isActive(runtime) + ); + if (activeConnections.length > 0) + incomingConnectionsFromModules.set(originModule, activeConnections); + } + } + + const incomingModules = Array.from(incomingConnectionsFromModules.keys()); + + // Module must be in the same chunks like the referencing module + const otherChunkModules = incomingModules.filter(originModule => { + for (const chunk of chunkGraph.getModuleChunksIterable( + config.rootModule + )) { + if (!chunkGraph.isModuleInChunk(originModule, chunk)) { + return true; + } + } + return false; + }); + if (otherChunkModules.length > 0) { + /** + * @param {RequestShortener} requestShortener request shortener + * @returns {string} problem description + */ + const problem = requestShortener => { + const names = otherChunkModules + .map(m => m.readableIdentifier(requestShortener)) + .sort(); + return `Module ${module.readableIdentifier( + requestShortener + )} is referenced from different chunks by these modules: ${names.join( + ", " + )}`; + }; + statistics.incorrectChunksOfImporter++; + failureCache.set(module, problem); // cache failures for performance + return problem; + } + + /** @type {Map<Module, readonly ModuleGraph.ModuleGraphConnection[]>} */ + const nonHarmonyConnections = new Map(); + for (const [originModule, connections] of incomingConnectionsFromModules) { + const selected = connections.filter( + connection => + !connection.dependency || + !(connection.dependency instanceof HarmonyImportDependency) + ); + if (selected.length > 0) + nonHarmonyConnections.set(originModule, connections); + } + if (nonHarmonyConnections.size > 0) { + /** + * @param {RequestShortener} requestShortener request shortener + * @returns {string} problem description + */ + const problem = requestShortener => { + const names = Array.from(nonHarmonyConnections) + .map( + ([originModule, connections]) => + `${originModule.readableIdentifier( + requestShortener + )} (referenced with ${Array.from( + new Set( + connections + .map(c => c.dependency && c.dependency.type) + .filter(Boolean) + ) + ) + .sort() + .join(", ")})` + ) + .sort(); + return `Module ${module.readableIdentifier( + requestShortener + )} is referenced from these modules with unsupported syntax: ${names.join( + ", " + )}`; + }; + statistics.incorrectModuleDependency++; + failureCache.set(module, problem); // cache failures for performance + return problem; + } + + if (runtime !== undefined && typeof runtime !== "string") { + // Module must be consistently referenced in the same runtimes + /** @type {{ originModule: Module, runtimeCondition: RuntimeSpec }[]} */ + const otherRuntimeConnections = []; + outer: for (const [ + originModule, + connections + ] of incomingConnectionsFromModules) { + /** @type {false | RuntimeSpec} */ + let currentRuntimeCondition = false; + for (const connection of connections) { + const runtimeCondition = filterRuntime(runtime, runtime => + connection.isTargetActive(runtime) + ); + if (runtimeCondition === false) continue; + if (runtimeCondition === true) continue outer; + currentRuntimeCondition = + currentRuntimeCondition !== false + ? mergeRuntime(currentRuntimeCondition, runtimeCondition) + : runtimeCondition; + } + if (currentRuntimeCondition !== false) { + otherRuntimeConnections.push({ + originModule, + runtimeCondition: currentRuntimeCondition + }); + } + } + if (otherRuntimeConnections.length > 0) { + /** + * @param {RequestShortener} requestShortener request shortener + * @returns {string} problem description + */ + const problem = requestShortener => + `Module ${module.readableIdentifier( + requestShortener + )} is runtime-dependent referenced by these modules: ${Array.from( + otherRuntimeConnections, + ({ originModule, runtimeCondition }) => + `${originModule.readableIdentifier( + requestShortener + )} (expected runtime ${runtimeToString( + runtime + )}, module is only referenced in ${runtimeToString( + /** @type {RuntimeSpec} */ (runtimeCondition) + )})` + ).join(", ")}`; + statistics.incorrectRuntimeCondition++; + failureCache.set(module, problem); // cache failures for performance + return problem; + } + } + + let backup; + if (avoidMutateOnFailure) { + backup = config.snapshot(); + } + + // Add the module + config.add(module); + + incomingModules.sort(compareModulesByIdentifier); + + // Every module which depends on the added module must be in the configuration too. + for (const originModule of incomingModules) { + const problem = this._tryToAdd( + compilation, + config, + originModule, + runtime, + activeRuntime, + possibleModules, + candidates, + failureCache, + chunkGraph, + false, + statistics + ); + if (problem) { + if (backup !== undefined) config.rollback(backup); + statistics.importerFailed++; + failureCache.set(module, problem); // cache failures for performance + return problem; + } + } + + // Add imports to possible candidates list + for (const imp of this._getImports(compilation, module, runtime)) { + candidates.add(imp); + } + statistics.added++; + return null; + } +} + +class ConcatConfiguration { + /** + * @param {Module} rootModule the root module + * @param {RuntimeSpec} runtime the runtime + */ + constructor(rootModule, runtime) { + this.rootModule = rootModule; + this.runtime = runtime; + /** @type {Set<Module>} */ + this.modules = new Set(); + this.modules.add(rootModule); + /** @type {Map<Module, Module | function(RequestShortener): string>} */ + this.warnings = new Map(); + } + + /** + * @param {Module} module the module + */ + add(module) { + this.modules.add(module); + } + + /** + * @param {Module} module the module + * @returns {boolean} true, when the module is in the module set + */ + has(module) { + return this.modules.has(module); + } + + isEmpty() { + return this.modules.size === 1; + } + + /** + * @param {Module} module the module + * @param {Module | function(RequestShortener): string} problem the problem + */ + addWarning(module, problem) { + this.warnings.set(module, problem); + } + + /** + * @returns {Map<Module, Module | function(RequestShortener): string>} warnings + */ + getWarningsSorted() { + return new Map( + Array.from(this.warnings).sort((a, b) => { + const ai = a[0].identifier(); + const bi = b[0].identifier(); + if (ai < bi) return -1; + if (ai > bi) return 1; + return 0; + }) + ); + } + + /** + * @returns {Set<Module>} modules as set + */ + getModules() { + return this.modules; + } + + snapshot() { + return this.modules.size; + } + + /** + * @param {number} snapshot snapshot + */ + rollback(snapshot) { + const modules = this.modules; + for (const m of modules) { + if (snapshot === 0) { + modules.delete(m); + } else { + snapshot--; + } + } + } +} + +module.exports = ModuleConcatenationPlugin; |