webpack
Version:
Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.
280 lines (264 loc) • 7.78 kB
JavaScript
/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const RuntimeGlobals = require("../RuntimeGlobals");
const UnsupportedFeatureWarning = require("../UnsupportedFeatureWarning");
const AMDRequireArrayDependency = require("./AMDRequireArrayDependency");
const AMDRequireContextDependency = require("./AMDRequireContextDependency");
const AMDRequireDependenciesBlock = require("./AMDRequireDependenciesBlock");
const AMDRequireDependency = require("./AMDRequireDependency");
const AMDRequireItemDependency = require("./AMDRequireItemDependency");
const ConstDependency = require("./ConstDependency");
const ContextDependencyHelpers = require("./ContextDependencyHelpers");
const LocalModuleDependency = require("./LocalModuleDependency");
const { getLocalModule } = require("./LocalModulesHelpers");
const UnsupportedDependency = require("./UnsupportedDependency");
const getFunctionExpression = require("./getFunctionExpression");
class AMDRequireDependenciesBlockParserPlugin {
constructor(options) {
this.options = options;
}
processFunctionArgument(parser, expression) {
let bindThis = true;
const fnData = getFunctionExpression(expression);
if (fnData) {
parser.inScope(
fnData.fn.params.filter(i => {
return !["require", "module", "exports"].includes(i.name);
}),
() => {
if (fnData.fn.body.type === "BlockStatement") {
parser.walkStatement(fnData.fn.body);
} else {
parser.walkExpression(fnData.fn.body);
}
}
);
parser.walkExpressions(fnData.expressions);
if (fnData.needThis === false) {
bindThis = false;
}
} else {
parser.walkExpression(expression);
}
return bindThis;
}
apply(parser) {
parser.hooks.call
.for("require")
.tap(
"AMDRequireDependenciesBlockParserPlugin",
this.processCallRequire.bind(this, parser)
);
}
processArray(parser, expr, param) {
if (param.isArray()) {
for (const p of param.items) {
const result = this.processItem(parser, expr, p);
if (result === undefined) {
this.processContext(parser, expr, p);
}
}
return true;
} else if (param.isConstArray()) {
const deps = [];
for (const request of param.array) {
let dep, localModule;
if (request === "require") {
dep = "__webpack_require__";
} else if (["exports", "module"].includes(request)) {
dep = request;
} else if ((localModule = getLocalModule(parser.state, request))) {
localModule.flagUsed();
dep = new LocalModuleDependency(localModule, undefined, false);
dep.loc = expr.loc;
parser.state.module.addPresentationalDependency(dep);
} else {
dep = this.newRequireItemDependency(request);
dep.loc = expr.loc;
dep.optional = !!parser.scope.inTry;
parser.state.current.addDependency(dep);
}
deps.push(dep);
}
const dep = this.newRequireArrayDependency(deps, param.range);
dep.loc = expr.loc;
dep.optional = !!parser.scope.inTry;
parser.state.module.addPresentationalDependency(dep);
return true;
}
}
processItem(parser, expr, param) {
if (param.isConditional()) {
for (const p of param.options) {
const result = this.processItem(parser, expr, p);
if (result === undefined) {
this.processContext(parser, expr, p);
}
}
return true;
} else if (param.isString()) {
let dep, localModule;
if (param.string === "require") {
dep = new ConstDependency("__webpack_require__", param.string, [
RuntimeGlobals.require
]);
} else if (param.string === "module") {
dep = new ConstDependency(
parser.state.module.buildInfo.moduleArgument,
param.range,
[RuntimeGlobals.module]
);
} else if (param.string === "exports") {
dep = new ConstDependency(
parser.state.module.buildInfo.exportsArgument,
param.range,
[RuntimeGlobals.exports]
);
} else if ((localModule = getLocalModule(parser.state, param.string))) {
localModule.flagUsed();
dep = new LocalModuleDependency(localModule, param.range, false);
} else {
dep = this.newRequireItemDependency(param.string, param.range);
dep.loc = expr.loc;
dep.optional = !!parser.scope.inTry;
parser.state.current.addDependency(dep);
return true;
}
dep.loc = expr.loc;
parser.state.module.addPresentationalDependency(dep);
return true;
}
}
processContext(parser, expr, param) {
const dep = ContextDependencyHelpers.create(
AMDRequireContextDependency,
param.range,
param,
expr,
this.options,
{
category: "amd"
},
parser
);
if (!dep) return;
dep.loc = expr.loc;
dep.optional = !!parser.scope.inTry;
parser.state.current.addDependency(dep);
return true;
}
processArrayForRequestString(param) {
if (param.isArray()) {
const result = param.items.map(item =>
this.processItemForRequestString(item)
);
if (result.every(Boolean)) return result.join(" ");
} else if (param.isConstArray()) {
return param.array.join(" ");
}
}
processItemForRequestString(param) {
if (param.isConditional()) {
const result = param.options.map(item =>
this.processItemForRequestString(item)
);
if (result.every(Boolean)) return result.join("|");
} else if (param.isString()) {
return param.string;
}
}
processCallRequire(parser, expr) {
let param;
let depBlock;
let dep;
let result;
const old = parser.state.current;
if (expr.arguments.length >= 1) {
param = parser.evaluateExpression(expr.arguments[0]);
depBlock = this.newRequireDependenciesBlock(
expr.loc,
this.processArrayForRequestString(param)
);
dep = this.newRequireDependency(
expr.range,
param.range,
expr.arguments.length > 1 ? expr.arguments[1].range : null,
expr.arguments.length > 2 ? expr.arguments[2].range : null
);
dep.loc = expr.loc;
depBlock.addDependency(dep);
parser.state.current = depBlock;
}
if (expr.arguments.length === 1) {
parser.inScope([], () => {
result = this.processArray(parser, expr, param);
});
parser.state.current = old;
if (!result) return;
parser.state.current.addBlock(depBlock);
return true;
}
if (expr.arguments.length === 2 || expr.arguments.length === 3) {
try {
parser.inScope([], () => {
result = this.processArray(parser, expr, param);
});
if (!result) {
const dep = new UnsupportedDependency("unsupported", expr.range);
old.addPresentationalDependency(dep);
if (parser.state.module) {
parser.state.module.addError(
new UnsupportedFeatureWarning(
"Cannot statically analyse 'require(…, …)' in line " +
expr.loc.start.line,
expr.loc
)
);
}
depBlock = null;
return true;
}
dep.functionBindThis = this.processFunctionArgument(
parser,
expr.arguments[1]
);
if (expr.arguments.length === 3) {
dep.errorCallbackBindThis = this.processFunctionArgument(
parser,
expr.arguments[2]
);
}
} finally {
parser.state.current = old;
if (depBlock) parser.state.current.addBlock(depBlock);
}
return true;
}
}
newRequireDependenciesBlock(loc, request) {
return new AMDRequireDependenciesBlock(loc, request);
}
newRequireDependency(
outerRange,
arrayRange,
functionRange,
errorCallbackRange
) {
return new AMDRequireDependency(
outerRange,
arrayRange,
functionRange,
errorCallbackRange
);
}
newRequireItemDependency(request, range) {
return new AMDRequireItemDependency(request, range);
}
newRequireArrayDependency(depsArray, range) {
return new AMDRequireArrayDependency(depsArray, range);
}
}
module.exports = AMDRequireDependenciesBlockParserPlugin;