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Diffstat (limited to 'node_modules/webpack/lib/ExternalModuleFactoryPlugin.js')
| -rw-r--r-- | node_modules/webpack/lib/ExternalModuleFactoryPlugin.js | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/ExternalModuleFactoryPlugin.js b/node_modules/webpack/lib/ExternalModuleFactoryPlugin.js new file mode 100644 index 00000000..5dae85c7 --- /dev/null +++ b/node_modules/webpack/lib/ExternalModuleFactoryPlugin.js @@ -0,0 +1,254 @@ +/* + MIT License http://www.opensource.org/licenses/mit-license.php + Author Tobias Koppers @sokra +*/ + +"use strict"; + +const util = require("util"); +const ExternalModule = require("./ExternalModule"); +const { resolveByProperty, cachedSetProperty } = require("./util/cleverMerge"); + +/** @typedef {import("../declarations/WebpackOptions").Externals} Externals */ +/** @typedef {import("./NormalModuleFactory")} NormalModuleFactory */ + +const UNSPECIFIED_EXTERNAL_TYPE_REGEXP = /^[a-z0-9-]+ /; +const EMPTY_RESOLVE_OPTIONS = {}; + +// TODO webpack 6 remove this +const callDeprecatedExternals = util.deprecate( + (externalsFunction, context, request, cb) => { + externalsFunction.call(null, context, request, cb); + }, + "The externals-function should be defined like ({context, request}, cb) => { ... }", + "DEP_WEBPACK_EXTERNALS_FUNCTION_PARAMETERS" +); + +const cache = new WeakMap(); + +const resolveLayer = (obj, layer) => { + let map = cache.get(obj); + if (map === undefined) { + map = new Map(); + cache.set(obj, map); + } else { + const cacheEntry = map.get(layer); + if (cacheEntry !== undefined) return cacheEntry; + } + const result = resolveByProperty(obj, "byLayer", layer); + map.set(layer, result); + return result; +}; + +class ExternalModuleFactoryPlugin { + /** + * @param {string | undefined} type default external type + * @param {Externals} externals externals config + */ + constructor(type, externals) { + this.type = type; + this.externals = externals; + } + + /** + * @param {NormalModuleFactory} normalModuleFactory the normal module factory + * @returns {void} + */ + apply(normalModuleFactory) { + const globalType = this.type; + normalModuleFactory.hooks.factorize.tapAsync( + "ExternalModuleFactoryPlugin", + (data, callback) => { + const context = data.context; + const contextInfo = data.contextInfo; + const dependency = data.dependencies[0]; + const dependencyType = data.dependencyType; + + /** + * @param {string|string[]|boolean|Record<string, string|string[]>} value the external config + * @param {string|undefined} type type of external + * @param {function(Error=, ExternalModule=): void} callback callback + * @returns {void} + */ + const handleExternal = (value, type, callback) => { + if (value === false) { + // Not externals, fallback to original factory + return callback(); + } + /** @type {string | string[] | Record<string, string|string[]>} */ + let externalConfig; + if (value === true) { + externalConfig = dependency.request; + } else { + externalConfig = value; + } + // When no explicit type is specified, extract it from the externalConfig + if (type === undefined) { + if ( + typeof externalConfig === "string" && + UNSPECIFIED_EXTERNAL_TYPE_REGEXP.test(externalConfig) + ) { + const idx = externalConfig.indexOf(" "); + type = externalConfig.slice(0, idx); + externalConfig = externalConfig.slice(idx + 1); + } else if ( + Array.isArray(externalConfig) && + externalConfig.length > 0 && + UNSPECIFIED_EXTERNAL_TYPE_REGEXP.test(externalConfig[0]) + ) { + const firstItem = externalConfig[0]; + const idx = firstItem.indexOf(" "); + type = firstItem.slice(0, idx); + externalConfig = [ + firstItem.slice(idx + 1), + ...externalConfig.slice(1) + ]; + } + } + callback( + null, + new ExternalModule( + externalConfig, + type || globalType, + dependency.request + ) + ); + }; + + /** + * @param {Externals} externals externals config + * @param {function((Error | null)=, ExternalModule=): void} callback callback + * @returns {void} + */ + const handleExternals = (externals, callback) => { + if (typeof externals === "string") { + if (externals === dependency.request) { + return handleExternal(dependency.request, undefined, callback); + } + } else if (Array.isArray(externals)) { + let i = 0; + const next = () => { + let asyncFlag; + const handleExternalsAndCallback = (err, module) => { + if (err) return callback(err); + if (!module) { + if (asyncFlag) { + asyncFlag = false; + return; + } + return next(); + } + callback(null, module); + }; + + do { + asyncFlag = true; + if (i >= externals.length) return callback(); + handleExternals(externals[i++], handleExternalsAndCallback); + } while (!asyncFlag); + asyncFlag = false; + }; + + next(); + return; + } else if (externals instanceof RegExp) { + if (externals.test(dependency.request)) { + return handleExternal(dependency.request, undefined, callback); + } + } else if (typeof externals === "function") { + const cb = (err, value, type) => { + if (err) return callback(err); + if (value !== undefined) { + handleExternal(value, type, callback); + } else { + callback(); + } + }; + if (externals.length === 3) { + // TODO webpack 6 remove this + callDeprecatedExternals( + externals, + context, + dependency.request, + cb + ); + } else { + const promise = externals( + { + context, + request: dependency.request, + dependencyType, + contextInfo, + getResolve: options => (context, request, callback) => { + const resolveContext = { + fileDependencies: data.fileDependencies, + missingDependencies: data.missingDependencies, + contextDependencies: data.contextDependencies + }; + let resolver = normalModuleFactory.getResolver( + "normal", + dependencyType + ? cachedSetProperty( + data.resolveOptions || EMPTY_RESOLVE_OPTIONS, + "dependencyType", + dependencyType + ) + : data.resolveOptions + ); + if (options) resolver = resolver.withOptions(options); + if (callback) { + resolver.resolve( + {}, + context, + request, + resolveContext, + callback + ); + } else { + return new Promise((resolve, reject) => { + resolver.resolve( + {}, + context, + request, + resolveContext, + (err, result) => { + if (err) reject(err); + else resolve(result); + } + ); + }); + } + } + }, + cb + ); + if (promise && promise.then) promise.then(r => cb(null, r), cb); + } + return; + } else if (typeof externals === "object") { + const resolvedExternals = resolveLayer( + externals, + contextInfo.issuerLayer + ); + if ( + Object.prototype.hasOwnProperty.call( + resolvedExternals, + dependency.request + ) + ) { + return handleExternal( + resolvedExternals[dependency.request], + undefined, + callback + ); + } + } + callback(); + }; + + handleExternals(this.externals, callback); + } + ); + } +} +module.exports = ExternalModuleFactoryPlugin; |