131 lines
3.2 KiB
JavaScript
131 lines
3.2 KiB
JavaScript
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
Author Joel Denning @joeldenning
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const { ConcatSource } = require("webpack-sources");
|
|
const Template = require("./Template");
|
|
|
|
/** @typedef {import("./Compilation")} Compilation */
|
|
|
|
/**
|
|
* @typedef {Object} SystemMainTemplatePluginOptions
|
|
* @param {string=} name the library name
|
|
*/
|
|
|
|
class SystemMainTemplatePlugin {
|
|
/**
|
|
* @param {SystemMainTemplatePluginOptions} options the plugin options
|
|
*/
|
|
constructor(options) {
|
|
this.name = options.name;
|
|
}
|
|
|
|
/**
|
|
* @param {Compilation} compilation the compilation instance
|
|
* @returns {void}
|
|
*/
|
|
apply(compilation) {
|
|
const { mainTemplate, chunkTemplate } = compilation;
|
|
|
|
const onRenderWithEntry = (source, chunk, hash) => {
|
|
const externals = chunk.getModules().filter(m => m.external);
|
|
|
|
// The name this bundle should be registered as with System
|
|
const name = this.name ? `${JSON.stringify(this.name)}, ` : "";
|
|
|
|
// The array of dependencies that are external to webpack and will be provided by System
|
|
const systemDependencies = JSON.stringify(
|
|
externals.map(m =>
|
|
typeof m.request === "object" ? m.request.amd : m.request
|
|
)
|
|
);
|
|
|
|
// The name of the variable provided by System for exporting
|
|
const dynamicExport = "__WEBPACK_DYNAMIC_EXPORT__";
|
|
|
|
// An array of the internal variable names for the webpack externals
|
|
const externalWebpackNames = externals.map(
|
|
m => `__WEBPACK_EXTERNAL_MODULE_${Template.toIdentifier(`${m.id}`)}__`
|
|
);
|
|
|
|
// Declaring variables for the internal variable names for the webpack externals
|
|
const externalVarDeclarations =
|
|
externalWebpackNames.length > 0
|
|
? `var ${externalWebpackNames.join(", ")};`
|
|
: "";
|
|
|
|
// The system.register format requires an array of setter functions for externals.
|
|
const setters =
|
|
externalWebpackNames.length === 0
|
|
? ""
|
|
: Template.asString([
|
|
"setters: [",
|
|
Template.indent(
|
|
externalWebpackNames
|
|
.map(external =>
|
|
Template.asString([
|
|
"function(module) {",
|
|
Template.indent(`${external} = module;`),
|
|
"}"
|
|
])
|
|
)
|
|
.join(",\n")
|
|
),
|
|
"],"
|
|
]);
|
|
|
|
return new ConcatSource(
|
|
Template.asString([
|
|
`System.register(${name}${systemDependencies}, function(${dynamicExport}) {`,
|
|
Template.indent([
|
|
externalVarDeclarations,
|
|
"return {",
|
|
Template.indent([
|
|
setters,
|
|
"execute: function() {",
|
|
Template.indent(`${dynamicExport}(`)
|
|
])
|
|
])
|
|
]) + "\n",
|
|
source,
|
|
"\n" +
|
|
Template.asString([
|
|
Template.indent([
|
|
Template.indent([Template.indent([");"]), "}"]),
|
|
"};"
|
|
]),
|
|
"})"
|
|
])
|
|
);
|
|
};
|
|
|
|
for (const template of [mainTemplate, chunkTemplate]) {
|
|
template.hooks.renderWithEntry.tap(
|
|
"SystemMainTemplatePlugin",
|
|
onRenderWithEntry
|
|
);
|
|
}
|
|
|
|
mainTemplate.hooks.globalHashPaths.tap(
|
|
"SystemMainTemplatePlugin",
|
|
paths => {
|
|
if (this.name) {
|
|
paths.push(this.name);
|
|
}
|
|
return paths;
|
|
}
|
|
);
|
|
|
|
mainTemplate.hooks.hash.tap("SystemMainTemplatePlugin", hash => {
|
|
hash.update("exports system");
|
|
if (this.name) {
|
|
hash.update(this.name);
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
module.exports = SystemMainTemplatePlugin;
|