webpack
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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.
337 lines (326 loc) • 9.28 kB
JavaScript
/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const AMDRequireItemDependency = require("./AMDRequireItemDependency");
const AMDRequireContextDependency = require("./AMDRequireContextDependency");
const ConstDependency = require("./ConstDependency");
const AMDDefineDependency = require("./AMDDefineDependency");
const AMDRequireArrayDependency = require("./AMDRequireArrayDependency");
const LocalModuleDependency = require("./LocalModuleDependency");
const ContextDependencyHelpers = require("./ContextDependencyHelpers");
const LocalModulesHelpers = require("./LocalModulesHelpers");
const isBoundFunctionExpression = expr => {
if (expr.type !== "CallExpression") return false;
if (expr.callee.type !== "MemberExpression") return false;
if (expr.callee.computed) return false;
if (expr.callee.object.type !== "FunctionExpression") return false;
if (expr.callee.property.type !== "Identifier") return false;
if (expr.callee.property.name !== "bind") return false;
return true;
};
const isUnboundFunctionExpression = expr => {
if (expr.type === "FunctionExpression") return true;
if (expr.type === "ArrowFunctionExpression") return true;
return false;
};
const isCallable = expr => {
if (isUnboundFunctionExpression(expr)) return true;
if (isBoundFunctionExpression(expr)) return true;
return false;
};
class AMDDefineDependencyParserPlugin {
constructor(options) {
this.options = options;
}
apply(parser) {
parser.hooks.call
.for("define")
.tap(
"AMDDefineDependencyParserPlugin",
this.processCallDefine.bind(this, parser)
);
}
processArray(parser, expr, param, identifiers, namedModule) {
if (param.isArray()) {
param.items.forEach((param, idx) => {
if (
param.isString() &&
["require", "module", "exports"].includes(param.string)
)
identifiers[idx] = param.string;
const result = this.processItem(parser, expr, param, namedModule);
if (result === undefined) {
this.processContext(parser, expr, param);
}
});
return true;
} else if (param.isConstArray()) {
const deps = [];
param.array.forEach((request, idx) => {
let dep;
let localModule;
if (request === "require") {
identifiers[idx] = request;
dep = "__webpack_require__";
} else if (["exports", "module"].includes(request)) {
identifiers[idx] = request;
dep = request;
} else if (
(localModule = LocalModulesHelpers.getLocalModule(
parser.state,
request
))
) {
dep = new LocalModuleDependency(localModule, undefined, false);
dep.loc = expr.loc;
parser.state.current.addDependency(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.current.addDependency(dep);
return true;
}
}
processItem(parser, expr, param, namedModule) {
if (param.isConditional()) {
param.options.forEach(param => {
const result = this.processItem(parser, expr, param);
if (result === undefined) {
this.processContext(parser, expr, param);
}
});
return true;
} else if (param.isString()) {
let dep, localModule;
if (param.string === "require") {
dep = new ConstDependency("__webpack_require__", param.range);
} else if (["require", "exports", "module"].includes(param.string)) {
dep = new ConstDependency(param.string, param.range);
} else if (
(localModule = LocalModulesHelpers.getLocalModule(
parser.state,
param.string,
namedModule
))
) {
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;
}
}
processContext(parser, expr, param) {
const dep = ContextDependencyHelpers.create(
AMDRequireContextDependency,
param.range,
param,
expr,
this.options,
{},
parser
);
if (!dep) return;
dep.loc = expr.loc;
dep.optional = !!parser.scope.inTry;
parser.state.current.addDependency(dep);
return true;
}
processCallDefine(parser, expr) {
let array, fn, obj, namedModule;
switch (expr.arguments.length) {
case 1:
if (isCallable(expr.arguments[0])) {
// define(f() {…})
fn = expr.arguments[0];
} else if (expr.arguments[0].type === "ObjectExpression") {
// define({…})
obj = expr.arguments[0];
} else {
// define(expr)
// unclear if function or object
obj = fn = expr.arguments[0];
}
break;
case 2:
if (expr.arguments[0].type === "Literal") {
namedModule = expr.arguments[0].value;
// define("…", …)
if (isCallable(expr.arguments[1])) {
// define("…", f() {…})
fn = expr.arguments[1];
} else if (expr.arguments[1].type === "ObjectExpression") {
// define("…", {…})
obj = expr.arguments[1];
} else {
// define("…", expr)
// unclear if function or object
obj = fn = expr.arguments[1];
}
} else {
array = expr.arguments[0];
if (isCallable(expr.arguments[1])) {
// define([…], f() {})
fn = expr.arguments[1];
} else if (expr.arguments[1].type === "ObjectExpression") {
// define([…], {…})
obj = expr.arguments[1];
} else {
// define([…], expr)
// unclear if function or object
obj = fn = expr.arguments[1];
}
}
break;
case 3:
// define("…", […], f() {…})
namedModule = expr.arguments[0].value;
array = expr.arguments[1];
if (isCallable(expr.arguments[2])) {
// define("…", […], f() {})
fn = expr.arguments[2];
} else if (expr.arguments[2].type === "ObjectExpression") {
// define("…", […], {…})
obj = expr.arguments[2];
} else {
// define("…", […], expr)
// unclear if function or object
obj = fn = expr.arguments[2];
}
break;
default:
return;
}
let fnParams = null;
let fnParamsOffset = 0;
if (fn) {
if (isUnboundFunctionExpression(fn)) {
fnParams = fn.params;
} else if (isBoundFunctionExpression(fn)) {
fnParams = fn.callee.object.params;
fnParamsOffset = fn.arguments.length - 1;
if (fnParamsOffset < 0) {
fnParamsOffset = 0;
}
}
}
let fnRenames = parser.scope.renames.createChild();
if (array) {
const identifiers = {};
const param = parser.evaluateExpression(array);
const result = this.processArray(
parser,
expr,
param,
identifiers,
namedModule
);
if (!result) return;
if (fnParams) {
fnParams = fnParams.slice(fnParamsOffset).filter((param, idx) => {
if (identifiers[idx]) {
fnRenames.set(param.name, identifiers[idx]);
return false;
}
return true;
});
}
} else {
const identifiers = ["require", "exports", "module"];
if (fnParams) {
fnParams = fnParams.slice(fnParamsOffset).filter((param, idx) => {
if (identifiers[idx]) {
fnRenames.set(param.name, identifiers[idx]);
return false;
}
return true;
});
}
}
let inTry;
if (fn && isUnboundFunctionExpression(fn)) {
inTry = parser.scope.inTry;
parser.inScope(fnParams, () => {
parser.scope.renames = fnRenames;
parser.scope.inTry = inTry;
if (fn.body.type === "BlockStatement") {
parser.walkStatement(fn.body);
} else {
parser.walkExpression(fn.body);
}
});
} else if (fn && isBoundFunctionExpression(fn)) {
inTry = parser.scope.inTry;
parser.inScope(
fn.callee.object.params.filter(
i => !["require", "module", "exports"].includes(i.name)
),
() => {
parser.scope.renames = fnRenames;
parser.scope.inTry = inTry;
if (fn.callee.object.body.type === "BlockStatement") {
parser.walkStatement(fn.callee.object.body);
} else {
parser.walkExpression(fn.callee.object.body);
}
}
);
if (fn.arguments) {
parser.walkExpressions(fn.arguments);
}
} else if (fn || obj) {
parser.walkExpression(fn || obj);
}
const dep = this.newDefineDependency(
expr.range,
array ? array.range : null,
fn ? fn.range : null,
obj ? obj.range : null,
namedModule ? namedModule : null
);
dep.loc = expr.loc;
if (namedModule) {
dep.localModule = LocalModulesHelpers.addLocalModule(
parser.state,
namedModule
);
}
parser.state.current.addDependency(dep);
return true;
}
newDefineDependency(
range,
arrayRange,
functionRange,
objectRange,
namedModule
) {
return new AMDDefineDependency(
range,
arrayRange,
functionRange,
objectRange,
namedModule
);
}
newRequireArrayDependency(depsArray, range) {
return new AMDRequireArrayDependency(depsArray, range);
}
newRequireItemDependency(request, range) {
return new AMDRequireItemDependency(request, range);
}
}
module.exports = AMDDefineDependencyParserPlugin;