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HarmonyCompatibilityDependency.js
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Thu, Feb 13, 20:42

HarmonyCompatibilityDependency.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const { UsageState } = require("../ExportsInfo");
const InitFragment = require("../InitFragment");
const RuntimeGlobals = require("../RuntimeGlobals");
const makeSerializable = require("../util/makeSerializable");
const NullDependency = require("./NullDependency");
/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("../Dependency")} Dependency */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../Module")} Module */
class HarmonyCompatibilityDependency extends NullDependency {
get type() {
return "harmony export header";
}
}
makeSerializable(
HarmonyCompatibilityDependency,
"webpack/lib/dependencies/HarmonyCompatibilityDependency"
);
HarmonyCompatibilityDependency.Template = class HarmonyExportDependencyTemplate extends (
NullDependency.Template
) {
/**
* @param {Dependency} dependency the dependency for which the template should be applied
* @param {ReplaceSource} source the current replace source which can be modified
* @param {DependencyTemplateContext} templateContext the context object
* @returns {void}
*/
apply(
dependency,
source,
{
module,
runtimeTemplate,
moduleGraph,
initFragments,
runtimeRequirements,
runtime,
concatenationScope
}
) {
if (concatenationScope) return;
const exportsInfo = moduleGraph.getExportsInfo(module);
if (
exportsInfo.getReadOnlyExportInfo("__esModule").getUsed(runtime) !==
UsageState.Unused
) {
const content = runtimeTemplate.defineEsModuleFlagStatement({
exportsArgument: module.exportsArgument,
runtimeRequirements
});
initFragments.push(
new InitFragment(
content,
InitFragment.STAGE_HARMONY_EXPORTS,
0,
"harmony compatibility"
)
);
}
if (moduleGraph.isAsync(module)) {
runtimeRequirements.add(RuntimeGlobals.module);
const used = exportsInfo.isUsed(runtime);
if (used) runtimeRequirements.add(RuntimeGlobals.exports);
initFragments.push(
new InitFragment(
`${module.moduleArgument}.exports = (async () => {\n`,
InitFragment.STAGE_ASYNC_BOUNDARY,
0,
undefined,
used ? `\nreturn ${module.exportsArgument};\n})();` : "\n})();"
)
);
}
}
};
module.exports = HarmonyCompatibilityDependency;

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