fix(linter): hanging when source has syntax/is flow (#7432)

Closes #7406

See
https://github.com/oxc-project/oxc/issues/7406#issuecomment-2494981152
for why this is happening

not sure whether there's a better solve for this/

apps/oxlint/src/lint.rs

@@ -414,6 +414,16 @@ mod test {
         assert_eq!(result.number_of_errors, 0);
     }
 
+    #[test]
+    // https://github.com/oxc-project/oxc/issues/7406
+    fn ignore_flow_import_plugin_directory() {
+        let args = &["--import-plugin", "-A all", "-D no-cycle", "fixtures/flow/"];
+        let result = test(args);
+        assert_eq!(result.number_of_files, 2);
+        assert_eq!(result.number_of_warnings, 0);
+        assert_eq!(result.number_of_errors, 0);
+    }
+
     #[test]
     fn filter_allow_all() {
         let args = &["-A", "all", "fixtures/linter"];

crates/oxc_linter/src/service/runtime.rs

@@ -11,7 +11,7 @@ use oxc_allocator::Allocator;
 use oxc_diagnostics::{DiagnosticSender, DiagnosticService, Error, OxcDiagnostic};
 use oxc_parser::{ParseOptions, Parser};
 use oxc_resolver::Resolver;
-use oxc_semantic::SemanticBuilder;
+use oxc_semantic::{ModuleRecord, SemanticBuilder};
 use oxc_span::{SourceType, VALID_EXTENSIONS};
 use rayon::{iter::ParallelBridge, prelude::ParallelIterator};
 use rustc_hash::FxHashSet;
@@ -199,6 +199,9 @@ impl Runtime {
             .parse();
 
         if !ret.errors.is_empty() {
+            if self.resolver.is_some() {
+                self.modules.add_resolved_module(path, Arc::new(ModuleRecord::default()));
+            }
             return if ret.is_flow_language {
                 vec![]
             } else {