From: Evan You <yyx990803@gmail.com>
Date: Tue, 21 Nov 2023 14:28:06 +0000 (+0800)
Subject: wip: force re-parse on reused sfc template ast
X-Git-Tag: v3.4.0-alpha.2~25
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b6886a80b1fe37eec06973931b66233c82c14cd9;p=thirdparty%2Fvuejs%2Fcore.git

wip: force re-parse on reused sfc template ast
---

diff --git a/packages/compiler-sfc/src/compileTemplate.ts b/packages/compiler-sfc/src/compileTemplate.ts
index d8c1059087..30d30072bf 100644
--- a/packages/compiler-sfc/src/compileTemplate.ts
+++ b/packages/compiler-sfc/src/compileTemplate.ts
@@ -4,7 +4,10 @@ import {
   CompilerError,
   NodeTransform,
   ParserOptions,
-  RootNode
+  RootNode,
+  NodeTypes,
+  ElementNode,
+  createRoot
 } from '@vue/compiler-core'
 import {
   SourceMapConsumer,
@@ -202,6 +205,19 @@ function doCompileTemplate({
   const shortId = id.replace(/^data-v-/, '')
   const longId = `data-v-${shortId}`
 
+  if (inAST?.codegenNode) {
+    // input AST has codegenNode - it has already been transformed and cannot
+    // be reused. We need to parse a fresh one.
+    const newAST = compiler.parse(inAST.source, {
+      parseMode: 'sfc',
+      onError: e => errors.push(e)
+    })
+    const template = newAST.children.find(
+      node => node.type === NodeTypes.ELEMENT && node.tag === 'template'
+    ) as ElementNode
+    inAST = createRoot(template.children, inAST.source)
+  }
+
   let { code, ast, preamble, map } = compiler.compile(inAST || source, {
     mode: 'module',
     prefixIdentifiers: true,