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