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