From 4c2e6e820af254164be90b51fde7b1c69a897fcc Mon Sep 17 00:00:00 2001
From: Dhruv Manilawala <dhruvmanila@gmail.com>
Date: Tue, 26 Sep 2023 11:46:18 +0530
Subject: [PATCH] Compute `NotebookIndex` to `Diagnostics` on stdin

---
 crates/ruff_cli/src/diagnostics.rs | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/crates/ruff_cli/src/diagnostics.rs b/crates/ruff_cli/src/diagnostics.rs
index ed4455786132f4..bb70e363b9d11d 100644
--- a/crates/ruff_cli/src/diagnostics.rs
+++ b/crates/ruff_cli/src/diagnostics.rs
@@ -343,9 +343,7 @@ pub(crate) fn lint_path(
 
     let notebook_indexes = if let SourceKind::IpyNotebook(notebook) = source_kind {
         FxHashMap::from_iter([(
-            path.to_str()
-                .ok_or_else(|| anyhow!("Unable to parse filename: {:?}", path))?
-                .to_string(),
+            path.to_string_lossy().to_string(),
             // Index needs to be computed always to store in cache.
             notebook.index().clone(),
         )])
@@ -474,6 +472,16 @@ pub(crate) fn lint_stdin(
         );
     }
 
+    let notebook_indexes = if let SourceKind::IpyNotebook(notebook) = source_kind {
+        FxHashMap::from_iter([(
+            path.map_or_else(|| "-".into(), |path| path.to_string_lossy().to_string()),
+            // Index needs to be computed always to store in cache.
+            notebook.index().clone(),
+        )])
+    } else {
+        FxHashMap::default()
+    };
+
     Ok(Diagnostics {
         messages,
         fixed: FxHashMap::from_iter([(
@@ -481,7 +489,7 @@ pub(crate) fn lint_stdin(
             fixed,
         )]),
         imports,
-        notebook_indexes: FxHashMap::default(),
+        notebook_indexes,
     })
 }