fix(parse): merge parserOptions from langaugeOptions

.changeset/thirty-houses-rest.md

@@ -0,0 +1,5 @@
+---
+"eslint-plugin-import-x": patch
+---
+
+Attach `ecmaVersion` and `sourceType` to `parserOptions` during parse

src/utils/parse.ts

@@ -79,8 +79,7 @@ export function parse(
 
   // ESLint in "flat" mode only sets context.languageOptions.parserOptions
   let parserOptions =
-    ('languageOptions' in context && context.languageOptions?.parserOptions) ||
-    context.parserOptions
+    context.languageOptions?.parserOptions || context.parserOptions
 
   const parserOrPath = getParser(path, context)
 
@@ -111,6 +110,17 @@ export function parse(
   // https://github.com/import-js/eslint-plugin-import/issues/1408#issuecomment-509298962
   parserOptions = withoutProjectParserOptions(parserOptions)
 
+  // If this is a flat config, we need to add ecmaVersion and sourceType (if present) from languageOptions
+  if (
+    parserOptions.ecmaVersion == null &&
+    context.languageOptions?.ecmaVersion
+  ) {
+    parserOptions.ecmaVersion = context.languageOptions.ecmaVersion
+  }
+  if (parserOptions.sourceType == null && context.languageOptions?.sourceType) {
+    parserOptions.sourceType = context.languageOptions.sourceType
+  }
+
   // require the parser relative to the main module (i.e., ESLint)
   const parser =
     typeof parserOrPath === 'string'