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Diffstat (limited to 'node_modules/webpack/lib/library/SystemLibraryPlugin.js')
| -rw-r--r-- | node_modules/webpack/lib/library/SystemLibraryPlugin.js | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/library/SystemLibraryPlugin.js b/node_modules/webpack/lib/library/SystemLibraryPlugin.js new file mode 100644 index 00000000..3795985b --- /dev/null +++ b/node_modules/webpack/lib/library/SystemLibraryPlugin.js @@ -0,0 +1,234 @@ +/* + MIT License http://www.opensource.org/licenses/mit-license.php + Author Joel Denning @joeldenning +*/ + +"use strict"; + +const { ConcatSource } = require("webpack-sources"); +const { UsageState } = require("../ExportsInfo"); +const ExternalModule = require("../ExternalModule"); +const Template = require("../Template"); +const propertyAccess = require("../util/propertyAccess"); +const AbstractLibraryPlugin = require("./AbstractLibraryPlugin"); + +/** @typedef {import("webpack-sources").Source} Source */ +/** @typedef {import("../../declarations/WebpackOptions").LibraryOptions} LibraryOptions */ +/** @typedef {import("../../declarations/WebpackOptions").LibraryType} LibraryType */ +/** @typedef {import("../Chunk")} Chunk */ +/** @typedef {import("../Compilation").ChunkHashContext} ChunkHashContext */ +/** @typedef {import("../Compiler")} Compiler */ +/** @typedef {import("../javascript/JavascriptModulesPlugin").RenderContext} RenderContext */ +/** @typedef {import("../util/Hash")} Hash */ +/** @template T @typedef {import("./AbstractLibraryPlugin").LibraryContext<T>} LibraryContext<T> */ + +/** + * @typedef {Object} SystemLibraryPluginOptions + * @property {LibraryType} type + */ + +/** + * @typedef {Object} SystemLibraryPluginParsed + * @property {string} name + */ + +/** + * @typedef {SystemLibraryPluginParsed} T + * @extends {AbstractLibraryPlugin<SystemLibraryPluginParsed>} + */ +class SystemLibraryPlugin extends AbstractLibraryPlugin { + /** + * @param {SystemLibraryPluginOptions} options the plugin options + */ + constructor(options) { + super({ + pluginName: "SystemLibraryPlugin", + type: options.type + }); + } + + /** + * @param {LibraryOptions} library normalized library option + * @returns {T | false} preprocess as needed by overriding + */ + parseOptions(library) { + const { name } = library; + if (name && typeof name !== "string") { + throw new Error( + `System.js library name must be a simple string or unset. ${AbstractLibraryPlugin.COMMON_LIBRARY_NAME_MESSAGE}` + ); + } + return { + name: /** @type {string} */ (name) + }; + } + + /** + * @param {Source} source source + * @param {RenderContext} renderContext render context + * @param {LibraryContext<T>} libraryContext context + * @returns {Source} source with library export + */ + render(source, { chunkGraph, moduleGraph, chunk }, { options, compilation }) { + const modules = chunkGraph + .getChunkModules(chunk) + .filter(m => m instanceof ExternalModule && m.externalType === "system"); + const externals = /** @type {ExternalModule[]} */ (modules); + + // The name this bundle should be registered as with System + const name = options.name + ? `${JSON.stringify(compilation.getPath(options.name, { chunk }))}, ` + : ""; + + // The array of dependencies that are external to webpack and will be provided by System + const systemDependencies = JSON.stringify( + externals.map(m => + typeof m.request === "object" && !Array.isArray(m.request) + ? m.request.amd + : m.request + ) + ); + + // The name of the variable provided by System for exporting + const dynamicExport = "__WEBPACK_DYNAMIC_EXPORT__"; + + // An array of the internal variable names for the webpack externals + const externalWebpackNames = externals.map( + m => + `__WEBPACK_EXTERNAL_MODULE_${Template.toIdentifier( + `${chunkGraph.getModuleId(m)}` + )}__` + ); + + // Declaring variables for the internal variable names for the webpack externals + const externalVarDeclarations = externalWebpackNames + .map(name => `var ${name} = {};`) + .join("\n"); + + // Define __esModule flag on all internal variables and helpers + /** @type {string[]} */ + const externalVarInitialization = []; + + // The system.register format requires an array of setter functions for externals. + const setters = + externalWebpackNames.length === 0 + ? "" + : Template.asString([ + "setters: [", + Template.indent( + externals + .map((module, i) => { + const external = externalWebpackNames[i]; + const exportsInfo = moduleGraph.getExportsInfo(module); + const otherUnused = + exportsInfo.otherExportsInfo.getUsed(chunk.runtime) === + UsageState.Unused; + const instructions = []; + const handledNames = []; + for (const exportInfo of exportsInfo.orderedExports) { + const used = exportInfo.getUsedName( + undefined, + chunk.runtime + ); + if (used) { + if (otherUnused || used !== exportInfo.name) { + instructions.push( + `${external}${propertyAccess([ + used + ])} = module${propertyAccess([exportInfo.name])};` + ); + handledNames.push(exportInfo.name); + } + } else { + handledNames.push(exportInfo.name); + } + } + if (!otherUnused) { + if ( + !Array.isArray(module.request) || + module.request.length === 1 + ) { + externalVarInitialization.push( + `Object.defineProperty(${external}, "__esModule", { value: true });` + ); + } + if (handledNames.length > 0) { + const name = `${external}handledNames`; + externalVarInitialization.push( + `var ${name} = ${JSON.stringify(handledNames)};` + ); + instructions.push( + Template.asString([ + "Object.keys(module).forEach(function(key) {", + Template.indent([ + `if(${name}.indexOf(key) >= 0)`, + Template.indent(`${external}[key] = module[key];`) + ]), + "});" + ]) + ); + } else { + instructions.push( + Template.asString([ + "Object.keys(module).forEach(function(key) {", + Template.indent([`${external}[key] = module[key];`]), + "});" + ]) + ); + } + } + if (instructions.length === 0) return "function() {}"; + return Template.asString([ + "function(module) {", + Template.indent(instructions), + "}" + ]); + }) + .join(",\n") + ), + "]," + ]); + + return new ConcatSource( + Template.asString([ + `System.register(${name}${systemDependencies}, function(${dynamicExport}, __system_context__) {`, + Template.indent([ + externalVarDeclarations, + Template.asString(externalVarInitialization), + "return {", + Template.indent([ + setters, + "execute: function() {", + Template.indent(`${dynamicExport}(`) + ]) + ]), + "" + ]), + source, + Template.asString([ + "", + Template.indent([ + Template.indent([Template.indent([");"]), "}"]), + "};" + ]), + "})" + ]) + ); + } + + /** + * @param {Chunk} chunk the chunk + * @param {Hash} hash hash + * @param {ChunkHashContext} chunkHashContext chunk hash context + * @param {LibraryContext<T>} libraryContext context + * @returns {void} + */ + chunkHash(chunk, hash, chunkHashContext, { options, compilation }) { + hash.update("SystemLibraryPlugin"); + if (options.name) { + hash.update(compilation.getPath(options.name, { chunk })); + } + } +} + +module.exports = SystemLibraryPlugin; |