fix(compiler-core): add original filename to TransformContext so that NodeTransform functions can use it (vuejs#6164)

Author: pohnean

packages/compiler-core/__tests__/transform.spec.ts

@@ -35,14 +35,16 @@ describe('compiler: transform', () => {
     }
 
     transform(ast, {
-      nodeTransforms: [plugin]
+      nodeTransforms: [plugin],
+      filename: 'example.vue'
     })
 
     const div = ast.children[0] as ElementNode
     expect(calls.length).toBe(4)
     expect(calls[0]).toMatchObject([
       ast,
       {
+        filename: 'example.vue',
         parent: null,
         currentNode: ast
       }

packages/compiler-core/src/transform.ts

@@ -82,9 +82,7 @@ export interface ImportItem {
 }
 
 export interface TransformContext
-  extends Required<
-      Omit<TransformOptions, 'filename' | keyof CompilerCompatOptions>
-    >,
+  extends Required<Omit<TransformOptions, keyof CompilerCompatOptions>>,
     CompilerCompatOptions {
   selfName: string | null
   root: RootNode
@@ -152,6 +150,7 @@ export function createTransformContext(
   const context: TransformContext = {
     // options
     selfName: nameMatch && capitalize(camelize(nameMatch[1])),
+    filename,
     prefixIdentifiers,
     hoistStatic,
     cacheHandlers,