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author | 2020-11-16 00:10:28 +0100 | |
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committer | 2020-11-16 00:10:28 +0100 | |
commit | e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch) | |
tree | 55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/webpack/lib/NormalModule.js | |
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Diffstat (limited to 'node_modules/webpack/lib/NormalModule.js')
-rw-r--r-- | node_modules/webpack/lib/NormalModule.js | 582 |
1 files changed, 582 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/NormalModule.js b/node_modules/webpack/lib/NormalModule.js new file mode 100644 index 0000000..76aa1bd --- /dev/null +++ b/node_modules/webpack/lib/NormalModule.js @@ -0,0 +1,582 @@ +/* + MIT License http://www.opensource.org/licenses/mit-license.php + Author Tobias Koppers @sokra +*/ +"use strict"; + +const NativeModule = require("module"); + +const { + CachedSource, + LineToLineMappedSource, + OriginalSource, + RawSource, + SourceMapSource +} = require("webpack-sources"); +const { getContext, runLoaders } = require("loader-runner"); + +const WebpackError = require("./WebpackError"); +const Module = require("./Module"); +const ModuleParseError = require("./ModuleParseError"); +const ModuleBuildError = require("./ModuleBuildError"); +const ModuleError = require("./ModuleError"); +const ModuleWarning = require("./ModuleWarning"); +const createHash = require("./util/createHash"); +const contextify = require("./util/identifier").contextify; + +/** @typedef {import("./util/createHash").Hash} Hash */ + +const asString = buf => { + if (Buffer.isBuffer(buf)) { + return buf.toString("utf-8"); + } + return buf; +}; + +const asBuffer = str => { + if (!Buffer.isBuffer(str)) { + return Buffer.from(str, "utf-8"); + } + return str; +}; + +class NonErrorEmittedError extends WebpackError { + constructor(error) { + super(); + + this.name = "NonErrorEmittedError"; + this.message = "(Emitted value instead of an instance of Error) " + error; + + Error.captureStackTrace(this, this.constructor); + } +} + +/** + * @typedef {Object} CachedSourceEntry + * @property {TODO} source the generated source + * @property {string} hash the hash value + */ + +class NormalModule extends Module { + constructor({ + type, + request, + userRequest, + rawRequest, + loaders, + resource, + matchResource, + parser, + generator, + resolveOptions + }) { + super(type, getContext(resource)); + + // Info from Factory + this.request = request; + this.userRequest = userRequest; + this.rawRequest = rawRequest; + this.binary = type.startsWith("webassembly"); + this.parser = parser; + this.generator = generator; + this.resource = resource; + this.matchResource = matchResource; + this.loaders = loaders; + if (resolveOptions !== undefined) this.resolveOptions = resolveOptions; + + // Info from Build + this.error = null; + this._source = null; + this._sourceSize = null; + this._buildHash = ""; + this.buildTimestamp = undefined; + /** @private @type {Map<string, CachedSourceEntry>} */ + this._cachedSources = new Map(); + + // Options for the NormalModule set by plugins + // TODO refactor this -> options object filled from Factory + this.useSourceMap = false; + this.lineToLine = false; + + // Cache + this._lastSuccessfulBuildMeta = {}; + } + + identifier() { + return this.request; + } + + readableIdentifier(requestShortener) { + return requestShortener.shorten(this.userRequest); + } + + libIdent(options) { + return contextify(options.context, this.userRequest); + } + + nameForCondition() { + const resource = this.matchResource || this.resource; + const idx = resource.indexOf("?"); + if (idx >= 0) return resource.substr(0, idx); + return resource; + } + + updateCacheModule(module) { + this.type = module.type; + this.request = module.request; + this.userRequest = module.userRequest; + this.rawRequest = module.rawRequest; + this.parser = module.parser; + this.generator = module.generator; + this.resource = module.resource; + this.matchResource = module.matchResource; + this.loaders = module.loaders; + this.resolveOptions = module.resolveOptions; + } + + createSourceForAsset(name, content, sourceMap) { + if (!sourceMap) { + return new RawSource(content); + } + + if (typeof sourceMap === "string") { + return new OriginalSource(content, sourceMap); + } + + return new SourceMapSource(content, name, sourceMap); + } + + createLoaderContext(resolver, options, compilation, fs) { + const requestShortener = compilation.runtimeTemplate.requestShortener; + const getCurrentLoaderName = () => { + const currentLoader = this.getCurrentLoader(loaderContext); + if (!currentLoader) return "(not in loader scope)"; + return requestShortener.shorten(currentLoader.loader); + }; + const loaderContext = { + version: 2, + emitWarning: warning => { + if (!(warning instanceof Error)) { + warning = new NonErrorEmittedError(warning); + } + this.warnings.push( + new ModuleWarning(this, warning, { + from: getCurrentLoaderName() + }) + ); + }, + emitError: error => { + if (!(error instanceof Error)) { + error = new NonErrorEmittedError(error); + } + this.errors.push( + new ModuleError(this, error, { + from: getCurrentLoaderName() + }) + ); + }, + getLogger: name => { + const currentLoader = this.getCurrentLoader(loaderContext); + return compilation.getLogger(() => + [currentLoader && currentLoader.loader, name, this.identifier()] + .filter(Boolean) + .join("|") + ); + }, + // TODO remove in webpack 5 + exec: (code, filename) => { + // @ts-ignore Argument of type 'this' is not assignable to parameter of type 'Module'. + const module = new NativeModule(filename, this); + // @ts-ignore _nodeModulePaths is deprecated and undocumented Node.js API + module.paths = NativeModule._nodeModulePaths(this.context); + module.filename = filename; + module._compile(code, filename); + return module.exports; + }, + resolve(context, request, callback) { + resolver.resolve({}, context, request, {}, callback); + }, + getResolve(options) { + const child = options ? resolver.withOptions(options) : resolver; + return (context, request, callback) => { + if (callback) { + child.resolve({}, context, request, {}, callback); + } else { + return new Promise((resolve, reject) => { + child.resolve({}, context, request, {}, (err, result) => { + if (err) reject(err); + else resolve(result); + }); + }); + } + }; + }, + emitFile: (name, content, sourceMap, assetInfo) => { + if (!this.buildInfo.assets) { + this.buildInfo.assets = Object.create(null); + this.buildInfo.assetsInfo = new Map(); + } + this.buildInfo.assets[name] = this.createSourceForAsset( + name, + content, + sourceMap + ); + this.buildInfo.assetsInfo.set(name, assetInfo); + }, + rootContext: options.context, + webpack: true, + sourceMap: !!this.useSourceMap, + mode: options.mode || "production", + _module: this, + _compilation: compilation, + _compiler: compilation.compiler, + fs: fs + }; + + compilation.hooks.normalModuleLoader.call(loaderContext, this); + if (options.loader) { + Object.assign(loaderContext, options.loader); + } + + return loaderContext; + } + + getCurrentLoader(loaderContext, index = loaderContext.loaderIndex) { + if ( + this.loaders && + this.loaders.length && + index < this.loaders.length && + index >= 0 && + this.loaders[index] + ) { + return this.loaders[index]; + } + return null; + } + + createSource(source, resourceBuffer, sourceMap) { + // if there is no identifier return raw source + if (!this.identifier) { + return new RawSource(source); + } + + // from here on we assume we have an identifier + const identifier = this.identifier(); + + if (this.lineToLine && resourceBuffer) { + return new LineToLineMappedSource( + source, + identifier, + asString(resourceBuffer) + ); + } + + if (this.useSourceMap && sourceMap) { + return new SourceMapSource(source, identifier, sourceMap); + } + + if (Buffer.isBuffer(source)) { + // @ts-ignore + // TODO We need to fix @types/webpack-sources to allow RawSource to take a Buffer | string + return new RawSource(source); + } + + return new OriginalSource(source, identifier); + } + + doBuild(options, compilation, resolver, fs, callback) { + const loaderContext = this.createLoaderContext( + resolver, + options, + compilation, + fs + ); + + runLoaders( + { + resource: this.resource, + loaders: this.loaders, + context: loaderContext, + readResource: fs.readFile.bind(fs) + }, + (err, result) => { + if (result) { + this.buildInfo.cacheable = result.cacheable; + this.buildInfo.fileDependencies = new Set(result.fileDependencies); + this.buildInfo.contextDependencies = new Set( + result.contextDependencies + ); + } + + if (err) { + if (!(err instanceof Error)) { + err = new NonErrorEmittedError(err); + } + const currentLoader = this.getCurrentLoader(loaderContext); + const error = new ModuleBuildError(this, err, { + from: + currentLoader && + compilation.runtimeTemplate.requestShortener.shorten( + currentLoader.loader + ) + }); + return callback(error); + } + + const resourceBuffer = result.resourceBuffer; + const source = result.result[0]; + const sourceMap = result.result.length >= 1 ? result.result[1] : null; + const extraInfo = result.result.length >= 2 ? result.result[2] : null; + + if (!Buffer.isBuffer(source) && typeof source !== "string") { + const currentLoader = this.getCurrentLoader(loaderContext, 0); + const err = new Error( + `Final loader (${ + currentLoader + ? compilation.runtimeTemplate.requestShortener.shorten( + currentLoader.loader + ) + : "unknown" + }) didn't return a Buffer or String` + ); + const error = new ModuleBuildError(this, err); + return callback(error); + } + + this._source = this.createSource( + this.binary ? asBuffer(source) : asString(source), + resourceBuffer, + sourceMap + ); + this._sourceSize = null; + this._ast = + typeof extraInfo === "object" && + extraInfo !== null && + extraInfo.webpackAST !== undefined + ? extraInfo.webpackAST + : null; + return callback(); + } + ); + } + + markModuleAsErrored(error) { + // Restore build meta from successful build to keep importing state + this.buildMeta = Object.assign({}, this._lastSuccessfulBuildMeta); + this.error = error; + this.errors.push(this.error); + this._source = new RawSource( + "throw new Error(" + JSON.stringify(this.error.message) + ");" + ); + this._sourceSize = null; + this._ast = null; + } + + applyNoParseRule(rule, content) { + // must start with "rule" if rule is a string + if (typeof rule === "string") { + return content.indexOf(rule) === 0; + } + + if (typeof rule === "function") { + return rule(content); + } + // we assume rule is a regexp + return rule.test(content); + } + + // check if module should not be parsed + // returns "true" if the module should !not! be parsed + // returns "false" if the module !must! be parsed + shouldPreventParsing(noParseRule, request) { + // if no noParseRule exists, return false + // the module !must! be parsed. + if (!noParseRule) { + return false; + } + + // we only have one rule to check + if (!Array.isArray(noParseRule)) { + // returns "true" if the module is !not! to be parsed + return this.applyNoParseRule(noParseRule, request); + } + + for (let i = 0; i < noParseRule.length; i++) { + const rule = noParseRule[i]; + // early exit on first truthy match + // this module is !not! to be parsed + if (this.applyNoParseRule(rule, request)) { + return true; + } + } + // no match found, so this module !should! be parsed + return false; + } + + _initBuildHash(compilation) { + const hash = createHash(compilation.outputOptions.hashFunction); + if (this._source) { + hash.update("source"); + this._source.updateHash(hash); + } + hash.update("meta"); + hash.update(JSON.stringify(this.buildMeta)); + this._buildHash = /** @type {string} */ (hash.digest("hex")); + } + + build(options, compilation, resolver, fs, callback) { + this.buildTimestamp = Date.now(); + this.built = true; + this._source = null; + this._sourceSize = null; + this._ast = null; + this._buildHash = ""; + this.error = null; + this.errors.length = 0; + this.warnings.length = 0; + this.buildMeta = {}; + this.buildInfo = { + cacheable: false, + fileDependencies: new Set(), + contextDependencies: new Set(), + assets: undefined, + assetsInfo: undefined + }; + + return this.doBuild(options, compilation, resolver, fs, err => { + this._cachedSources.clear(); + + // if we have an error mark module as failed and exit + if (err) { + this.markModuleAsErrored(err); + this._initBuildHash(compilation); + return callback(); + } + + // check if this module should !not! be parsed. + // if so, exit here; + const noParseRule = options.module && options.module.noParse; + if (this.shouldPreventParsing(noParseRule, this.request)) { + this._initBuildHash(compilation); + return callback(); + } + + const handleParseError = e => { + const source = this._source.source(); + const loaders = this.loaders.map(item => + contextify(options.context, item.loader) + ); + const error = new ModuleParseError(this, source, e, loaders); + this.markModuleAsErrored(error); + this._initBuildHash(compilation); + return callback(); + }; + + const handleParseResult = result => { + this._lastSuccessfulBuildMeta = this.buildMeta; + this._initBuildHash(compilation); + return callback(); + }; + + try { + const result = this.parser.parse( + this._ast || this._source.source(), + { + current: this, + module: this, + compilation: compilation, + options: options + }, + (err, result) => { + if (err) { + handleParseError(err); + } else { + handleParseResult(result); + } + } + ); + if (result !== undefined) { + // parse is sync + handleParseResult(result); + } + } catch (e) { + handleParseError(e); + } + }); + } + + getHashDigest(dependencyTemplates) { + // TODO webpack 5 refactor + let dtHash = dependencyTemplates.get("hash"); + return `${this.hash}-${dtHash}`; + } + + source(dependencyTemplates, runtimeTemplate, type = "javascript") { + const hashDigest = this.getHashDigest(dependencyTemplates); + const cacheEntry = this._cachedSources.get(type); + if (cacheEntry !== undefined && cacheEntry.hash === hashDigest) { + // We can reuse the cached source + return cacheEntry.source; + } + + const source = this.generator.generate( + this, + dependencyTemplates, + runtimeTemplate, + type + ); + + const cachedSource = new CachedSource(source); + this._cachedSources.set(type, { + source: cachedSource, + hash: hashDigest + }); + return cachedSource; + } + + originalSource() { + return this._source; + } + + needRebuild(fileTimestamps, contextTimestamps) { + // always try to rebuild in case of an error + if (this.error) return true; + + // always rebuild when module is not cacheable + if (!this.buildInfo.cacheable) return true; + + // Check timestamps of all dependencies + // Missing timestamp -> need rebuild + // Timestamp bigger than buildTimestamp -> need rebuild + for (const file of this.buildInfo.fileDependencies) { + const timestamp = fileTimestamps.get(file); + if (!timestamp) return true; + if (timestamp >= this.buildTimestamp) return true; + } + for (const file of this.buildInfo.contextDependencies) { + const timestamp = contextTimestamps.get(file); + if (!timestamp) return true; + if (timestamp >= this.buildTimestamp) return true; + } + // elsewise -> no rebuild needed + return false; + } + + size() { + if (this._sourceSize === null) { + this._sourceSize = this._source ? this._source.size() : -1; + } + return this._sourceSize; + } + + /** + * @param {Hash} hash the hash used to track dependencies + * @returns {void} + */ + updateHash(hash) { + hash.update(this._buildHash); + super.updateHash(hash); + } +} + +module.exports = NormalModule; |