137 lines
3.7 KiB
JavaScript
137 lines
3.7 KiB
JavaScript
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
Author Tobias Koppers @sokra
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const { UsageState } = require("../ModuleGraph");
|
|
const RuntimeGlobals = require("../RuntimeGlobals");
|
|
const makeSerializable = require("../util/makeSerializable");
|
|
const propertyAccess = require("../util/propertyAccess");
|
|
const NullDependency = require("./NullDependency");
|
|
|
|
/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
|
|
/** @typedef {import("../Dependency")} Dependency */
|
|
/** @typedef {import("../Dependency").ExportsSpec} ExportsSpec */
|
|
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
|
|
/** @typedef {import("../ModuleGraph")} ModuleGraph */
|
|
|
|
class CommonJsSelfReferenceDependency extends NullDependency {
|
|
constructor(range, base, names) {
|
|
super();
|
|
this.range = range;
|
|
this.base = base;
|
|
this.names = names;
|
|
}
|
|
|
|
get type() {
|
|
return "cjs self exports reference";
|
|
}
|
|
|
|
/**
|
|
* @returns {string | null} an identifier to merge equal requests
|
|
*/
|
|
getResourceIdentifier() {
|
|
return `self`;
|
|
}
|
|
|
|
/**
|
|
* Returns list of exports referenced by this dependency
|
|
* @param {ModuleGraph} moduleGraph module graph
|
|
* @returns {string[][]} referenced exports
|
|
*/
|
|
getReferencedExports(moduleGraph) {
|
|
return [this.names];
|
|
}
|
|
|
|
serialize(context) {
|
|
const { write } = context;
|
|
write(this.range);
|
|
write(this.base);
|
|
write(this.names);
|
|
super.serialize(context);
|
|
}
|
|
|
|
deserialize(context) {
|
|
const { read } = context;
|
|
this.range = read();
|
|
this.base = read();
|
|
this.names = read();
|
|
super.deserialize(context);
|
|
}
|
|
}
|
|
|
|
makeSerializable(
|
|
CommonJsSelfReferenceDependency,
|
|
"webpack/lib/dependencies/CommonJsSelfReferenceDependency"
|
|
);
|
|
|
|
CommonJsSelfReferenceDependency.Template = class CommonJsSelfReferenceDependencyTemplate 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, moduleGraph, initFragments, runtimeRequirements }
|
|
) {
|
|
const dep = /** @type {CommonJsSelfReferenceDependency} */ (dependency);
|
|
let used;
|
|
if (dep.names.length === 0) {
|
|
used = dep.names;
|
|
} else if (module.buildMeta && module.buildMeta.exportsType === "default") {
|
|
const defaultInfo = moduleGraph.getExportInfo(module, "default");
|
|
if (defaultInfo.used === UsageState.Used) {
|
|
used = dep.names;
|
|
} else {
|
|
used = defaultInfo.exportsInfo.getUsedName(dep.names);
|
|
}
|
|
} else {
|
|
used = moduleGraph.getExportsInfo(module).getUsedName(dep.names);
|
|
}
|
|
if (!used) {
|
|
throw new Error(
|
|
"Self-reference dependency has unused export name: This should not happen"
|
|
);
|
|
}
|
|
|
|
let base = undefined;
|
|
switch (dep.base) {
|
|
case "exports":
|
|
runtimeRequirements.add(RuntimeGlobals.exports);
|
|
base = module.exportsArgument;
|
|
break;
|
|
case "module.exports":
|
|
runtimeRequirements.add(RuntimeGlobals.module);
|
|
base = `${module.moduleArgument}.exports`;
|
|
break;
|
|
case "this":
|
|
runtimeRequirements.add(RuntimeGlobals.thisAsExports);
|
|
base = "this";
|
|
break;
|
|
default:
|
|
throw new Error(`Unsupported base ${dep.base}`);
|
|
}
|
|
|
|
if (base === dep.base && used.join() === dep.names.join()) {
|
|
// Nothing has to be changed
|
|
// We don't use a replacement for compat reasons
|
|
// for plugins that update `module._source` which they
|
|
// shouldn't do!
|
|
return;
|
|
}
|
|
|
|
source.replace(
|
|
dep.range[0],
|
|
dep.range[1] - 1,
|
|
`/* self exports access */ ${base}${propertyAccess(used)}`
|
|
);
|
|
}
|
|
};
|
|
|
|
module.exports = CommonJsSelfReferenceDependency;
|