Change handlebars preprocess to postprocess (#8644)

src/language-handlebars/parser-glimmer.js

@@ -1,11 +1,13 @@
 "use strict";
 
 const createError = require("../common/parser-create-error");
+const postprocess = require("./postprocess");
 
-function parse(text) {
+function parse(text, parsers, options) {
+  const { preprocess: glimmer, traverse } = require("@glimmer/syntax");
+  let ast;
   try {
-    const glimmer = require("@glimmer/syntax").preprocess;
-    return glimmer(text, { mode: "codemod" });
+    ast = glimmer(text, { mode: "codemod" });
     /* istanbul ignore next */
   } catch (error) {
     const matches = error.message.match(/on line (\d+)/);
@@ -17,6 +19,8 @@ function parse(text) {
       throw error;
     }
   }
+
+  return postprocess(ast, options, traverse);
 }
 
 module.exports = {

src/language-handlebars/postprocess.js

@@ -1,8 +1,6 @@
 "use strict";
 
-const transform = require("@glimmer/syntax").traverse;
-
-const PREPROCESS_PIPELINE = [addBackslash];
+const PIPELINE = [addBackslash];
 
 /* VISITORS */
 
@@ -22,13 +20,13 @@ function addBackslash(/* options*/) {
   };
 }
 
-function preprocess(ast, options) {
-  for (const fn of PREPROCESS_PIPELINE) {
+function postprocess(ast, options, traverse) {
+  for (const fn of PIPELINE) {
     const visitor = fn(options);
-    transform(ast, visitor);
+    traverse(ast, visitor);
   }
 
   return ast;
 }
 
-module.exports = preprocess;
+module.exports = postprocess;

src/language-handlebars/printer-glimmer.js

@@ -12,7 +12,6 @@ const {
 } = require("../document").builders;
 
 const clean = require("./clean");
-const preprocess = require("./preprocess");
 const {
   getNextNode,
   getPreviousNode,
@@ -676,5 +675,4 @@ function doesNotHavePositionalParams(node) {
 module.exports = {
   print,
   massageAstNode: clean,
-  preprocess,
 };