vue hello world项目
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const NodeStuffInWebError = require("./NodeStuffInWebError");
const RuntimeGlobals = require("./RuntimeGlobals");
const CachedConstDependency = require("./dependencies/CachedConstDependency");
const ConstDependency = require("./dependencies/ConstDependency");
const {
evaluateToString,
expressionIsUnsupported
} = require("./javascript/JavascriptParserHelpers");
const { relative } = require("./util/fs");
const { parseResource } = require("./util/identifier");
/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("./Compiler")} Compiler */
/** @typedef {import("./Dependency")} Dependency */
/** @typedef {import("./DependencyTemplates")} DependencyTemplates */
/** @typedef {import("./RuntimeTemplate")} RuntimeTemplate */
class NodeStuffPlugin {
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(
"NodeStuffPlugin",
(compilation, { normalModuleFactory }) => {
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("NodeStuffPlugin", expr => {
const dep = new ConstDependency(
RuntimeGlobals.global,
expr.range,
[RuntimeGlobals.global]
);
dep.loc = 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 Node.js feature and doesn't present in browser."
)
);
}
});
parser.hooks.rename.for("global").tap("NodeStuffPlugin", expr => {
const dep = new ConstDependency(
RuntimeGlobals.global,
expr.range,
[RuntimeGlobals.global]
);
dep.loc = expr.loc;
parser.state.module.addPresentationalDependency(dep);
return false;
});
}
const setModuleConstant = (expressionName, fn, warning) => {
parser.hooks.expression
.for(expressionName)
.tap("NodeStuffPlugin", expr => {
const dep = new CachedConstDependency(
JSON.stringify(fn(parser.state.module)),
expr.range,
expressionName
);
dep.loc = 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;
});
};
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",
"The __filename is Node.js feature and doesn't present in browser."
);
break;
case true:
setModuleConstant("__filename", module =>
relative(compiler.inputFileSystem, context, module.resource)
);
break;
}
parser.hooks.evaluateIdentifier
.for("__filename")
.tap("NodeStuffPlugin", 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",
"/",
"The __dirname is Node.js feature and doesn't present in browser."
);
break;
case true:
setModuleConstant("__dirname", module =>
relative(compiler.inputFileSystem, context, module.context)
);
break;
}
parser.hooks.evaluateIdentifier
.for("__dirname")
.tap("NodeStuffPlugin", expr => {
if (!parser.state.module) return;
return evaluateToString(parser.state.module.context)(expr);
});
}
parser.hooks.expression
.for("require.extensions")
.tap(
"NodeStuffPlugin",
expressionIsUnsupported(
parser,
"require.extensions is not supported by webpack. Use a loader instead."
)
);
};
normalModuleFactory.hooks.parser
.for("javascript/auto")
.tap("NodeStuffPlugin", handler);
normalModuleFactory.hooks.parser
.for("javascript/dynamic")
.tap("NodeStuffPlugin", handler);
}
);
}
}
module.exports = NodeStuffPlugin;