Function transformCommonJSModule

test/fixtures/snapshot/typescript.js:104410–104431

* Transforms a SourceFile into a CommonJS module. * * @param node The SourceFile node.

(node)

         * @param node The SourceFile node.
         */
        function transformCommonJSModule(node) {
            startLexicalEnvironment();
            var statements = [];
            var ensureUseStrict = ts.getStrictOptionValue(compilerOptions, "alwaysStrict") || (!compilerOptions.noImplicitUseStrict && ts.isExternalModule(currentSourceFile));
            var statementOffset = factory.copyPrologue(node.statements, statements, ensureUseStrict && !ts.isJsonSourceFile(node), topLevelVisitor);
            if (shouldEmitUnderscoreUnderscoreESModule()) {
                ts.append(statements, createUnderscoreUnderscoreESModule());
            }
            if (ts.length(currentModuleInfo.exportedNames)) {
                var chunkSize = 50;
                for (var i = 0; i < currentModuleInfo.exportedNames.length; i += chunkSize) {
                    ts.append(statements, factory.createExpressionStatement(ts.reduceLeft(currentModuleInfo.exportedNames.slice(i, i + chunkSize), function (prev, nextId) { return factory.createAssignment(factory.createPropertyAccessExpression(factory.createIdentifier("exports"), factory.createIdentifier(ts.idText(nextId))), prev); }, factory.createVoidZero())));
                }
            }
            ts.append(statements, ts.visitNode(currentModuleInfo.externalHelpersImportDeclaration, topLevelVisitor, ts.isStatement));
            ts.addRange(statements, ts.visitNodes(node.statements, topLevelVisitor, ts.isStatement, statementOffset));
            addExportEqualsIfNeeded(statements, /*emitAsReturn*/ false);
            ts.insertStatementsAfterStandardPrologue(statements, endLexicalEnvironment());
            var updated = factory.updateSourceFile(node, ts.setTextRange(factory.createNodeArray(statements), node.statements));
            ts.addEmitHelpers(updated, context.readEmitHelpers());
            return updated;
        }
        /**
         * Transforms a SourceFile into an AMD module.
         *