mirror of https://github.com/webpack/webpack.git
97 lines
3.2 KiB
JavaScript
97 lines
3.2 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const CommonJsRequireDependency = require("./CommonJsRequireDependency");
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const CommonJsRequireContextDependency = require("./CommonJsRequireContextDependency");
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const RequireHeaderDependency = require("./RequireHeaderDependency");
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const LocalModuleDependency = require("./LocalModuleDependency");
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const ContextDependencyHelpers = require("./ContextDependencyHelpers");
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const LocalModulesHelpers = require("./LocalModulesHelpers");
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const ParserHelpers = require("../ParserHelpers");
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class CommonJsRequireDependencyParserPlugin {
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constructor(options) {
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this.options = options;
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}
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apply(parser) {
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const options = this.options;
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const processItem = (expr, param) => {
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if(param.isString()) {
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const dep = new CommonJsRequireDependency(param.string, param.range);
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dep.loc = expr.loc;
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dep.optional = !!parser.scope.inTry;
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parser.state.current.addDependency(dep);
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return true;
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}
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};
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const processContext = (expr, param) => {
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const dep = ContextDependencyHelpers.create(CommonJsRequireContextDependency, expr.range, param, expr, options);
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if(!dep) return;
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dep.loc = expr.loc;
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dep.optional = !!parser.scope.inTry;
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parser.state.current.addDependency(dep);
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return true;
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};
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parser.plugin("expression require.cache", ParserHelpers.toConstantDependency("__webpack_require__.c"));
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parser.plugin("expression require", (expr) => {
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const dep = new CommonJsRequireContextDependency({
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request: options.unknownContextRequest,
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recursive: options.unknownContextRecursive,
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regExp: options.unknownContextRegExp,
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mode: "sync"
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}, expr.range);
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dep.critical = options.unknownContextCritical && "require function is used in a way in which dependencies cannot be statically extracted";
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dep.loc = expr.loc;
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dep.optional = !!parser.scope.inTry;
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parser.state.current.addDependency(dep);
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return true;
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});
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parser.plugin("call require", (expr) => {
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if(expr.arguments.length !== 1) return;
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let localModule;
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const param = parser.evaluateExpression(expr.arguments[0]);
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if(param.isConditional()) {
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let isExpression = false;
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const prevLength = parser.state.current.dependencies.length;
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const dep = new RequireHeaderDependency(expr.callee.range);
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dep.loc = expr.loc;
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parser.state.current.addDependency(dep);
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param.options.forEach(param => {
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const result = processItem(expr, param);
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if(result === undefined) {
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isExpression = true;
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}
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});
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if(isExpression) {
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parser.state.current.dependencies.length = prevLength;
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} else {
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return true;
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}
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}
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if(param.isString() && (localModule = LocalModulesHelpers.getLocalModule(parser.state, param.string))) {
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const dep = new LocalModuleDependency(localModule, expr.range);
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dep.loc = expr.loc;
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parser.state.current.addDependency(dep);
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return true;
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} else {
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const result = processItem(expr, param);
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if(result === undefined) {
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processContext(expr, param);
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} else {
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const dep = new RequireHeaderDependency(expr.callee.range);
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dep.loc = expr.loc;
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parser.state.current.addDependency(dep);
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}
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return true;
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}
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});
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}
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}
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module.exports = CommonJsRequireDependencyParserPlugin;
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