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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const {
JAVASCRIPT_MODULE_TYPE_AUTO,
JAVASCRIPT_MODULE_TYPE_DYNAMIC
} = require("./ModuleTypeConstants");
const NodeStuffInWebError = require("./NodeStuffInWebError");
const RuntimeGlobals = require("./RuntimeGlobals");
const CachedConstDependency = require("./dependencies/CachedConstDependency");
const ConstDependency = require("./dependencies/ConstDependency");
const ExternalModuleDependency = require("./dependencies/ExternalModuleDependency");
const {
evaluateToString,
expressionIsUnsupported
} = require("./javascript/JavascriptParserHelpers");
const { relative } = require("./util/fs");
const { parseResource } = require("./util/identifier");
/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("../declarations/WebpackOptions").JavascriptParserOptions} JavascriptParserOptions */
/** @typedef {import("../declarations/WebpackOptions").NodeOptions} NodeOptions */
/** @typedef {import("./Compiler")} Compiler */
/** @typedef {import("./Dependency")} Dependency */
/** @typedef {import("./Dependency").DependencyLocation} DependencyLocation */
/** @typedef {import("./DependencyTemplates")} DependencyTemplates */
/** @typedef {import("./NormalModule")} NormalModule */
/** @typedef {import("./RuntimeTemplate")} RuntimeTemplate */
/** @typedef {import("./javascript/JavascriptParser")} JavascriptParser */
/** @typedef {import("./javascript/JavascriptParser").Range} Range */
/** @typedef {import("./util/fs").InputFileSystem} InputFileSystem */
const PLUGIN_NAME = "NodeStuffPlugin";
class NodeStuffPlugin {
/**
* @param {NodeOptions} options options
*/
constructor(options) {
this.options = options;
}
/**
* Apply the plugin
* @param {Compiler} compiler the compiler instance
* @returns {void}
*/
apply(compiler) {
const options = this.options;
compiler.hooks.compilation.tap(
PLUGIN_NAME,
(compilation, { normalModuleFactory }) => {
compilation.dependencyTemplates.set(
ExternalModuleDependency,
new ExternalModuleDependency.Template()
);
/**
* @param {JavascriptParser} parser the parser
* @param {JavascriptParserOptions} parserOptions options
* @returns {void}
*/
const handler = (parser, parserOptions) => {
if (parserOptions.node === false) return;
let localOptions = options;
if (parserOptions.node) {
localOptions = { ...localOptions, ...parserOptions.node };
}
if (localOptions.global !== false) {
const withWarning = localOptions.global === "warn";
parser.hooks.expression.for("global").tap(PLUGIN_NAME, expr => {
const dep = new ConstDependency(
RuntimeGlobals.global,
/** @type {Range} */ (expr.range),
[RuntimeGlobals.global]
);
dep.loc = /** @type {DependencyLocation} */ (expr.loc);
parser.state.module.addPresentationalDependency(dep);
// TODO webpack 6 remove
if (withWarning) {
parser.state.module.addWarning(
new NodeStuffInWebError(
dep.loc,
"global",
"The global namespace object is a Node.js feature and isn't available in browsers."
)
);
}
});
parser.hooks.rename.for("global").tap(PLUGIN_NAME, expr => {
const dep = new ConstDependency(
RuntimeGlobals.global,
/** @type {Range} */ (expr.range),
[RuntimeGlobals.global]
);
dep.loc = /** @type {DependencyLocation} */ (expr.loc);
parser.state.module.addPresentationalDependency(dep);
return false;
});
}
/**
* @param {string} expressionName expression name
* @param {(module: NormalModule) => string} fn function
* @param {string=} warning warning
* @returns {void}
*/
const setModuleConstant = (expressionName, fn, warning) => {
parser.hooks.expression
.for(expressionName)
.tap(PLUGIN_NAME, expr => {
const dep = new CachedConstDependency(
JSON.stringify(fn(parser.state.module)),
/** @type {Range} */ (expr.range),
expressionName
);
dep.loc = /** @type {DependencyLocation} */ (expr.loc);
parser.state.module.addPresentationalDependency(dep);
// TODO webpack 6 remove
if (warning) {
parser.state.module.addWarning(
new NodeStuffInWebError(dep.loc, expressionName, warning)
);
}
return true;
});
};
/**
* @param {string} expressionName expression name
* @param {(value: string) => string} fn function
* @returns {void}
*/
const setUrlModuleConstant = (expressionName, fn) => {
parser.hooks.expression
.for(expressionName)
.tap(PLUGIN_NAME, expr => {
const dep = new ExternalModuleDependency(
"url",
[
{
name: "fileURLToPath",
value: "__webpack_fileURLToPath__"
}
],
undefined,
fn("__webpack_fileURLToPath__"),
/** @type {Range} */ (expr.range),
expressionName
);
dep.loc = /** @type {DependencyLocation} */ (expr.loc);
parser.state.module.addPresentationalDependency(dep);
return true;
});
};
/**
* @param {string} expressionName expression name
* @param {string} value value
* @param {string=} warning warning
* @returns {void}
*/
const setConstant = (expressionName, value, warning) =>
setModuleConstant(expressionName, () => value, warning);
const context = compiler.context;
if (localOptions.__filename) {
switch (localOptions.__filename) {
case "mock":
setConstant("__filename", "/index.js");
break;
case "warn-mock":
setConstant(
"__filename",
"/index.js",
"__filename is a Node.js feature and isn't available in browsers."
);
break;
case "node-module":
setUrlModuleConstant(
"__filename",
functionName => `${functionName}(import.meta.url)`
);
break;
case true:
setModuleConstant("__filename", module =>
relative(
/** @type {InputFileSystem} */ (compiler.inputFileSystem),
context,
module.resource
)
);
break;
}
parser.hooks.evaluateIdentifier
.for("__filename")
.tap(PLUGIN_NAME, expr => {
if (!parser.state.module) return;
const resource = parseResource(parser.state.module.resource);
return evaluateToString(resource.path)(expr);
});
}
if (localOptions.__dirname) {
switch (localOptions.__dirname) {
case "mock":
setConstant("__dirname", "/");
break;
case "warn-mock":
setConstant(
"__dirname",
"/",
"__dirname is a Node.js feature and isn't available in browsers."
);
break;
case "node-module":
setUrlModuleConstant(
"__dirname",
functionName =>
`${functionName}(import.meta.url + "/..").slice(0, -1)`
);
break;
case true:
setModuleConstant("__dirname", module =>
relative(
/** @type {InputFileSystem} */ (compiler.inputFileSystem),
context,
/** @type {string} */ (module.context)
)
);
break;
}
parser.hooks.evaluateIdentifier
.for("__dirname")
.tap(PLUGIN_NAME, expr => {
if (!parser.state.module) return;
return evaluateToString(
/** @type {string} */ (parser.state.module.context)
)(expr);
});
}
parser.hooks.expression
.for("require.extensions")
.tap(
PLUGIN_NAME,
expressionIsUnsupported(
parser,
"require.extensions is not supported by webpack. Use a loader instead."
)
);
};
normalModuleFactory.hooks.parser
.for(JAVASCRIPT_MODULE_TYPE_AUTO)
.tap(PLUGIN_NAME, handler);
normalModuleFactory.hooks.parser
.for(JAVASCRIPT_MODULE_TYPE_DYNAMIC)
.tap(PLUGIN_NAME, handler);
}
);
}
}
module.exports = NodeStuffPlugin;