Implement workspace prioritization setting

crates/ruff_server/src/session/settings.rs

@@ -46,6 +46,7 @@ pub(crate) struct ResolvedEditorSettings {
     ignore: Option<Vec<RuleSelector>>,
     exclude: Option<Vec<String>>,
     line_length: Option<LineLength>,
+    prioritize_workspace_settings: bool,
 }
 
 /// This is a direct representation of the settings schema sent by the client.
@@ -60,6 +61,7 @@ pub(crate) struct ClientSettings {
     code_action: Option<CodeActionOptions>,
     exclude: Option<Vec<String>>,
     line_length: Option<LineLength>,
+    prioritize_workspace_settings: Option<bool>,
 }
 
 /// This is a direct representation of the workspace settings schema,
@@ -259,6 +261,9 @@ impl ResolvedClientSettings {
                     Some(settings.exclude.as_ref()?.clone())
                 }),
                 line_length: Self::resolve_optional(all_settings, |settings| settings.line_length),
+                prioritize_workspace_settings: Self::resolve_or(all_settings, |settings| {
+                    settings.prioritize_workspace_settings
+                }, false)
             },
         }
     }
@@ -324,6 +329,7 @@ impl ResolvedEditorSettings {
             ignore,
             exclude,
             line_length,
+            prioritize_workspace_settings
         } = self.clone();
 
         let editor_configuration = Configuration {
@@ -354,7 +360,11 @@ impl ResolvedEditorSettings {
             ..Default::default()
         };
 
-        let configuration = editor_configuration.combine(project_configuration);
+        let configuration = if prioritize_workspace_settings {
+            project_configuration.combine(editor_configuration)
+        } else {
+            editor_configuration.combine(project_configuration)
+        };
 
         configuration.into_settings(project_root)
     }
@@ -596,7 +606,8 @@ mod tests {
                     extend_select: None,
                     ignore: None,
                     exclude: None,
-                    line_length: None
+                    line_length: None,
+                    prioritize_workspace_settings: false,
                 }
             }
         );
@@ -624,7 +635,8 @@ mod tests {
                     extend_select: None,
                     ignore: None,
                     exclude: None,
-                    line_length: None
+                    line_length: None,
+                    prioritize_workspace_settings: false,
                 }
             }
         );
@@ -706,7 +718,8 @@ mod tests {
                     extend_select: None,
                     ignore: Some(vec![RuleSelector::from_str("RUF001").unwrap()]),
                     exclude: Some(vec!["third_party".into()]),
-                    line_length: Some(LineLength::try_from(80).unwrap())
+                    line_length: Some(LineLength::try_from(80).unwrap()),
+                    prioritize_workspace_settings: false,
                 }
             }
         );