AMDRequireDependenciesBlockParserPlugin.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const AMDRequireItemDependency = require("./AMDRequireItemDependency");
const AMDRequireArrayDependency = require("./AMDRequireArrayDependency");
const AMDRequireContextDependency = require("./AMDRequireContextDependency");
const AMDRequireDependenciesBlock = require("./AMDRequireDependenciesBlock");
const UnsupportedDependency = require("./UnsupportedDependency");
const LocalModuleDependency = require("./LocalModuleDependency");
const ContextDependencyHelpers = require("./ContextDependencyHelpers");
const LocalModulesHelpers = require("./LocalModulesHelpers");
const ConstDependency = require("./ConstDependency");
const getFunctionExpression = require("./getFunctionExpression");
const UnsupportedFeatureWarning = require("../UnsupportedFeatureWarning");
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"].indexOf(i.name) < 0;
}), () => {
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) {
const options = this.options;
parser.plugin("call require", (expr) => {
let param;
let dep;
let result;
const old = parser.state.current;
if(expr.arguments.length >= 1) {
param = parser.evaluateExpression(expr.arguments[0]);
dep = new AMDRequireDependenciesBlock(
expr,
param.range,
(expr.arguments.length > 1) ? expr.arguments[1].range : null,
(expr.arguments.length > 2) ? expr.arguments[2].range : null,
parser.state.module,
expr.loc
);
parser.state.current = dep;
}
if(expr.arguments.length === 1) {
parser.inScope([], () => {
result = parser.applyPluginsBailResult("call require:amd:array", expr, param);
});
parser.state.current = old;
if(!result) return;
parser.state.current.addBlock(dep);
return true;
}
if(expr.arguments.length === 2 || expr.arguments.length === 3) {
try {
parser.inScope([], () => {
result = parser.applyPluginsBailResult("call require:amd:array", expr, param);
});
if(!result) {
dep = new UnsupportedDependency("unsupported", expr.range);
old.addDependency(dep);
if(parser.state.module)
parser.state.module.errors.push(new UnsupportedFeatureWarning(parser.state.module, "Cannot statically analyse 'require(..., ...)' in line " + expr.loc.start.line));
dep = 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(dep)
parser.state.current.addBlock(dep);
}
return true;
}
});
parser.plugin("call require:amd:array", (expr, param) => {
if(param.isArray()) {
param.items.forEach((param) => {
const result = parser.applyPluginsBailResult("call require:amd:item", expr, param);
if(result === undefined) {
parser.applyPluginsBailResult("call require:amd:context", expr, param);
}
});
return true;
} else if(param.isConstArray()) {
const deps = [];
param.array.forEach((request) => {
let dep, localModule;
if(request === "require") {
dep = "__webpack_require__";
} else if(["exports", "module"].indexOf(request) >= 0) {
dep = request;
} else if(localModule = LocalModulesHelpers.getLocalModule(parser.state, request)) { // eslint-disable-line no-cond-assign
dep = new LocalModuleDependency(localModule);
dep.loc = expr.loc;
parser.state.current.addDependency(dep);
} else {
dep = new AMDRequireItemDependency(request);
dep.loc = expr.loc;
dep.optional = !!parser.scope.inTry;
parser.state.current.addDependency(dep);
}
deps.push(dep);
});
const dep = new AMDRequireArrayDependency(deps, param.range);
dep.loc = expr.loc;
dep.optional = !!parser.scope.inTry;
parser.state.current.addDependency(dep);
return true;
}
});
parser.plugin("call require:amd:item", (expr, param) => {
if(param.isConditional()) {
param.options.forEach((param) => {
const result = parser.applyPluginsBailResult("call require:amd:item", expr, param);
if(result === undefined) {
parser.applyPluginsBailResult("call require:amd:context", expr, param);
}
});
return true;
} else if(param.isString()) {
let dep, localModule;
if(param.string === "require") {
dep = new ConstDependency("__webpack_require__", param.string);
} else if(param.string === "module") {
dep = new ConstDependency(parser.state.module.moduleArgument || "module", param.range);
} else if(param.string === "exports") {
dep = new ConstDependency(parser.state.module.exportsArgument || "exports", param.range);
} else if(localModule = LocalModulesHelpers.getLocalModule(parser.state, param.string)) { // eslint-disable-line no-cond-assign
dep = new LocalModuleDependency(localModule, param.range);
} else {
dep = new AMDRequireItemDependency(param.string, param.range);
}
dep.loc = expr.loc;
dep.optional = !!parser.scope.inTry;
parser.state.current.addDependency(dep);
return true;
}
});
parser.plugin("call require:amd:context", (expr, param) => {
const dep = ContextDependencyHelpers.create(AMDRequireContextDependency, param.range, param, expr, options);
if(!dep) return;
dep.loc = expr.loc;
dep.optional = !!parser.scope.inTry;
parser.state.current.addDependency(dep);
return true;
});
}
}
module.exports = AMDRequireDependenciesBlockParserPlugin;