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4 years ago
/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const ParserHelpers = require("./ParserHelpers");
const ConstDependency = require("./dependencies/ConstDependency");
const NullFactory = require("./NullFactory");
class ProvidePlugin {
constructor(definitions) {
this.definitions = definitions;
}
apply(compiler) {
const definitions = this.definitions;
compiler.hooks.compilation.tap(
"ProvidePlugin",
(compilation, { normalModuleFactory }) => {
compilation.dependencyFactories.set(ConstDependency, new NullFactory());
compilation.dependencyTemplates.set(
ConstDependency,
new ConstDependency.Template()
);
const handler = (parser, parserOptions) => {
Object.keys(definitions).forEach(name => {
var request = [].concat(definitions[name]);
var splittedName = name.split(".");
if (splittedName.length > 0) {
splittedName.slice(1).forEach((_, i) => {
const name = splittedName.slice(0, i + 1).join(".");
parser.hooks.canRename
.for(name)
.tap("ProvidePlugin", ParserHelpers.approve);
});
}
parser.hooks.expression.for(name).tap("ProvidePlugin", expr => {
let nameIdentifier = name;
const scopedName = name.includes(".");
let expression = `require(${JSON.stringify(request[0])})`;
if (scopedName) {
nameIdentifier = `__webpack_provided_${name.replace(
/\./g,
"_dot_"
)}`;
}
if (request.length > 1) {
expression += request
.slice(1)
.map(r => `[${JSON.stringify(r)}]`)
.join("");
}
if (
!ParserHelpers.addParsedVariableToModule(
parser,
nameIdentifier,
expression
)
) {
return false;
}
if (scopedName) {
ParserHelpers.toConstantDependency(
parser,
nameIdentifier
)(expr);
}
return true;
});
});
};
normalModuleFactory.hooks.parser
.for("javascript/auto")
.tap("ProvidePlugin", handler);
normalModuleFactory.hooks.parser
.for("javascript/dynamic")
.tap("ProvidePlugin", handler);
// Disable ProvidePlugin for javascript/esm, see https://github.com/webpack/webpack/issues/7032
}
);
}
}
module.exports = ProvidePlugin;