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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const CommentCompilationWarning = require("../CommentCompilationWarning");
const RuntimeGlobals = require("../RuntimeGlobals");
const UnsupportedFeatureWarning = require("../UnsupportedFeatureWarning");
const {
evaluateToIdentifier,
evaluateToString,
expressionIsUnsupported,
toConstantDependency
} = require("../javascript/JavascriptParserHelpers");
const CommonJsFullRequireDependency = require("./CommonJsFullRequireDependency");
const CommonJsRequireContextDependency = require("./CommonJsRequireContextDependency");
const CommonJsRequireDependency = require("./CommonJsRequireDependency");
const ConstDependency = require("./ConstDependency");
const ContextDependencyHelpers = require("./ContextDependencyHelpers");
const LocalModuleDependency = require("./LocalModuleDependency");
const { getLocalModule } = require("./LocalModulesHelpers");
const RequireHeaderDependency = require("./RequireHeaderDependency");
const RequireResolveContextDependency = require("./RequireResolveContextDependency");
const RequireResolveDependency = require("./RequireResolveDependency");
const RequireResolveHeaderDependency = require("./RequireResolveHeaderDependency");
/** @typedef {import("../../declarations/WebpackOptions").JavascriptParserOptions} JavascriptParserOptions */
class CommonJsImportsParserPlugin {
/**
* @param {JavascriptParserOptions} options parser options
*/
constructor(options) {
this.options = options;
}
apply(parser) {
const options = this.options;
// metadata //
const tapRequireExpression = (expression, getMembers) => {
parser.hooks.typeof
.for(expression)
.tap(
"CommonJsPlugin",
toConstantDependency(parser, JSON.stringify("function"))
);
parser.hooks.evaluateTypeof
.for(expression)
.tap("CommonJsPlugin", evaluateToString("function"));
parser.hooks.evaluateIdentifier
.for(expression)
.tap(
"CommonJsPlugin",
evaluateToIdentifier(expression, "require", getMembers, true)
);
};
tapRequireExpression("require", () => []);
tapRequireExpression("require.resolve", () => ["resolve"]);
tapRequireExpression("require.resolveWeak", () => ["resolveWeak"]);
// Weird stuff //
parser.hooks.assign.for("require").tap("CommonJsPlugin", expr => {
// to not leak to global "require", we need to define a local require here.
const dep = new ConstDependency("var require;", 0);
dep.loc = expr.loc;
parser.state.module.addPresentationalDependency(dep);
return true;
});
// Unsupported //
parser.hooks.expression
.for("require.main.require")
.tap(
"CommonJsPlugin",
expressionIsUnsupported(
parser,
"require.main.require is not supported by webpack."
)
);
parser.hooks.call
.for("require.main.require")
.tap(
"CommonJsPlugin",
expressionIsUnsupported(
parser,
"require.main.require is not supported by webpack."
)
);
parser.hooks.expression
.for("module.parent.require")
.tap(
"CommonJsPlugin",
expressionIsUnsupported(
parser,
"module.parent.require is not supported by webpack."
)
);
parser.hooks.call
.for("module.parent.require")
.tap(
"CommonJsPlugin",
expressionIsUnsupported(
parser,
"module.parent.require is not supported by webpack."
)
);
// renaming //
parser.hooks.canRename.for("require").tap("CommonJsPlugin", () => true);
parser.hooks.rename.for("require").tap("CommonJsPlugin", expr => {
// To avoid "not defined" error, replace the value with undefined
const dep = new ConstDependency("undefined", expr.range);
dep.loc = expr.loc;
parser.state.module.addPresentationalDependency(dep);
return false;
});
// inspection //
parser.hooks.expression
.for("require.cache")
.tap(
"CommonJsImportsParserPlugin",
toConstantDependency(parser, RuntimeGlobals.moduleCache, [
RuntimeGlobals.moduleCache,
RuntimeGlobals.moduleId,
RuntimeGlobals.moduleLoaded
])
);
// require as expression //
parser.hooks.expression
.for("require")
.tap("CommonJsImportsParserPlugin", 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;
});
// require //
const processRequireItem = (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 processRequireContext = (expr, param) => {
const dep = ContextDependencyHelpers.create(
CommonJsRequireContextDependency,
expr.range,
param,
expr,
options,
{
category: "commonjs"
},
parser
);
if (!dep) return;
dep.loc = expr.loc;
dep.optional = !!parser.scope.inTry;
parser.state.current.addDependency(dep);
return true;
};
const createRequireHandler = callNew => expr => {
if (options.commonjsMagicComments) {
const { options: requireOptions, errors: commentErrors } =
parser.parseCommentOptions(expr.range);
if (commentErrors) {
for (const e of commentErrors) {
const { comment } = e;
parser.state.module.addWarning(
new CommentCompilationWarning(
`Compilation error while processing magic comment(-s): /*${comment.value}*/: ${e.message}`,
comment.loc
)
);
}
}
if (requireOptions) {
if (requireOptions.webpackIgnore !== undefined) {
if (typeof requireOptions.webpackIgnore !== "boolean") {
parser.state.module.addWarning(
new UnsupportedFeatureWarning(
`\`webpackIgnore\` expected a boolean, but received: ${requireOptions.webpackIgnore}.`,
expr.loc
)
);
} else {
// Do not instrument `require()` if `webpackIgnore` is `true`
if (requireOptions.webpackIgnore) {
return true;
}
}
}
}
}
if (expr.arguments.length !== 1) return;
let localModule;
const param = parser.evaluateExpression(expr.arguments[0]);
if (param.isConditional()) {
let isExpression = false;
for (const p of param.options) {
const result = processRequireItem(expr, p);
if (result === undefined) {
isExpression = true;
}
}
if (!isExpression) {
const dep = new RequireHeaderDependency(expr.callee.range);
dep.loc = expr.loc;
parser.state.module.addPresentationalDependency(dep);
return true;
}
}
if (
param.isString() &&
(localModule = getLocalModule(parser.state, param.string))
) {
localModule.flagUsed();
const dep = new LocalModuleDependency(localModule, expr.range, callNew);
dep.loc = expr.loc;
parser.state.module.addPresentationalDependency(dep);
return true;
} else {
const result = processRequireItem(expr, param);
if (result === undefined) {
processRequireContext(expr, param);
} else {
const dep = new RequireHeaderDependency(expr.callee.range);
dep.loc = expr.loc;
parser.state.module.addPresentationalDependency(dep);
}
return true;
}
};
parser.hooks.call
.for("require")
.tap("CommonJsImportsParserPlugin", createRequireHandler(false));
parser.hooks.new
.for("require")
.tap("CommonJsImportsParserPlugin", createRequireHandler(true));
parser.hooks.call
.for("module.require")
.tap("CommonJsImportsParserPlugin", createRequireHandler(false));
parser.hooks.new
.for("module.require")
.tap("CommonJsImportsParserPlugin", createRequireHandler(true));
// require with property access //
const chainHandler = (expr, calleeMembers, callExpr, members) => {
if (callExpr.arguments.length !== 1) return;
const param = parser.evaluateExpression(callExpr.arguments[0]);
if (param.isString() && !getLocalModule(parser.state, param.string)) {
const dep = new CommonJsFullRequireDependency(
param.string,
expr.range,
members
);
dep.asiSafe = !parser.isAsiPosition(expr.range[0]);
dep.optional = !!parser.scope.inTry;
dep.loc = expr.loc;
parser.state.module.addDependency(dep);
return true;
}
};
const callChainHandler = (expr, calleeMembers, callExpr, members) => {
if (callExpr.arguments.length !== 1) return;
const param = parser.evaluateExpression(callExpr.arguments[0]);
if (param.isString() && !getLocalModule(parser.state, param.string)) {
const dep = new CommonJsFullRequireDependency(
param.string,
expr.callee.range,
members
);
dep.call = true;
dep.asiSafe = !parser.isAsiPosition(expr.range[0]);
dep.optional = !!parser.scope.inTry;
dep.loc = expr.callee.loc;
parser.state.module.addDependency(dep);
parser.walkExpressions(expr.arguments);
return true;
}
};
parser.hooks.memberChainOfCallMemberChain
.for("require")
.tap("CommonJsImportsParserPlugin", chainHandler);
parser.hooks.memberChainOfCallMemberChain
.for("module.require")
.tap("CommonJsImportsParserPlugin", chainHandler);
parser.hooks.callMemberChainOfCallMemberChain
.for("require")
.tap("CommonJsImportsParserPlugin", callChainHandler);
parser.hooks.callMemberChainOfCallMemberChain
.for("module.require")
.tap("CommonJsImportsParserPlugin", callChainHandler);
// require.resolve //
const processResolve = (expr, weak) => {
if (expr.arguments.length !== 1) return;
const param = parser.evaluateExpression(expr.arguments[0]);
if (param.isConditional()) {
for (const option of param.options) {
const result = processResolveItem(expr, option, weak);
if (result === undefined) {
processResolveContext(expr, option, weak);
}
}
const dep = new RequireResolveHeaderDependency(expr.callee.range);
dep.loc = expr.loc;
parser.state.module.addPresentationalDependency(dep);
return true;
} else {
const result = processResolveItem(expr, param, weak);
if (result === undefined) {
processResolveContext(expr, param, weak);
}
const dep = new RequireResolveHeaderDependency(expr.callee.range);
dep.loc = expr.loc;
parser.state.module.addPresentationalDependency(dep);
return true;
}
};
const processResolveItem = (expr, param, weak) => {
if (param.isString()) {
const dep = new RequireResolveDependency(param.string, param.range);
dep.loc = expr.loc;
dep.optional = !!parser.scope.inTry;
dep.weak = weak;
parser.state.current.addDependency(dep);
return true;
}
};
const processResolveContext = (expr, param, weak) => {
const dep = ContextDependencyHelpers.create(
RequireResolveContextDependency,
param.range,
param,
expr,
options,
{
category: "commonjs",
mode: weak ? "weak" : "sync"
},
parser
);
if (!dep) return;
dep.loc = expr.loc;
dep.optional = !!parser.scope.inTry;
parser.state.current.addDependency(dep);
return true;
};
parser.hooks.call
.for("require.resolve")
.tap("RequireResolveDependencyParserPlugin", expr => {
return processResolve(expr, false);
});
parser.hooks.call
.for("require.resolveWeak")
.tap("RequireResolveDependencyParserPlugin", expr => {
return processResolve(expr, true);
});
}
}
module.exports = CommonJsImportsParserPlugin;