103 lines
3.4 KiB
JavaScript
103 lines
3.4 KiB
JavaScript
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const RequireEnsureDependenciesBlock = require("./RequireEnsureDependenciesBlock");
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const RequireEnsureItemDependency = require("./RequireEnsureItemDependency");
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const getFunctionExpression = require("./getFunctionExpression");
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module.exports = class RequireEnsureDependenciesBlockParserPlugin {
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apply(parser) {
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parser.plugin("call require.ensure", expr => {
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let chunkName = null;
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let chunkNameRange = null;
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let errorExpressionArg = null;
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let errorExpression = null;
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switch(expr.arguments.length) {
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case 4:
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{
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const chunkNameExpr = parser.evaluateExpression(expr.arguments[3]);
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if(!chunkNameExpr.isString()) return;
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chunkNameRange = chunkNameExpr.range;
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chunkName = chunkNameExpr.string;
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}
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// falls through
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case 3:
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{
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errorExpressionArg = expr.arguments[2];
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errorExpression = getFunctionExpression(errorExpressionArg);
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if(!errorExpression && !chunkName) {
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const chunkNameExpr = parser.evaluateExpression(expr.arguments[2]);
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if(!chunkNameExpr.isString()) return;
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chunkNameRange = chunkNameExpr.range;
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chunkName = chunkNameExpr.string;
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}
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}
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// falls through
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case 2:
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{
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const dependenciesExpr = parser.evaluateExpression(expr.arguments[0]);
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const dependenciesItems = dependenciesExpr.isArray() ? dependenciesExpr.items : [dependenciesExpr];
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const successExpressionArg = expr.arguments[1];
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const successExpression = getFunctionExpression(successExpressionArg);
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if(successExpression) {
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parser.walkExpressions(successExpression.expressions);
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}
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if(errorExpression) {
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parser.walkExpressions(errorExpression.expressions);
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}
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const dep = new RequireEnsureDependenciesBlock(expr,
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successExpression ? successExpression.fn : successExpressionArg,
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errorExpression ? errorExpression.fn : errorExpressionArg,
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chunkName, chunkNameRange, parser.state.module, expr.loc);
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const old = parser.state.current;
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parser.state.current = dep;
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try {
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let failed = false;
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parser.inScope([], () => {
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dependenciesItems.forEach(ee => {
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if(ee.isString()) {
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const edep = new RequireEnsureItemDependency(ee.string, ee.range);
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edep.loc = dep.loc;
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dep.addDependency(edep);
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} else {
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failed = true;
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}
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});
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});
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if(failed) {
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return;
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}
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if(successExpression) {
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if(successExpression.fn.body.type === "BlockStatement")
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parser.walkStatement(successExpression.fn.body);
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else
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parser.walkExpression(successExpression.fn.body);
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}
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old.addBlock(dep);
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} finally {
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parser.state.current = old;
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}
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if(!successExpression) {
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parser.walkExpression(successExpressionArg);
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}
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if(errorExpression) {
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if(errorExpression.fn.body.type === "BlockStatement")
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parser.walkStatement(errorExpression.fn.body);
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else
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parser.walkExpression(errorExpression.fn.body);
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} else if(errorExpressionArg) {
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parser.walkExpression(errorExpressionArg);
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}
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return true;
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}
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}
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});
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}
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};
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