Rename ruff crate to ruff_linter (#7529)

crates/ruff_linter/src/source_kind.rs

@@ -0,0 +1,31 @@
+use ruff_diagnostics::SourceMap;
+use ruff_notebook::Notebook;
+
+#[derive(Clone, Debug, PartialEq, is_macro::Is)]
+pub enum SourceKind {
+    /// The source contains Python source code.
+    Python(String),
+    /// The source contains a Jupyter notebook.
+    IpyNotebook(Notebook),
+}
+
+impl SourceKind {
+    #[must_use]
+    pub(crate) fn updated(&self, new_source: String, source_map: &SourceMap) -> Self {
+        match self {
+            SourceKind::IpyNotebook(notebook) => {
+                let mut cloned = notebook.clone();
+                cloned.update(source_map, new_source);
+                SourceKind::IpyNotebook(cloned)
+            }
+            SourceKind::Python(_) => SourceKind::Python(new_source),
+        }
+    }
+
+    pub fn source_code(&self) -> &str {
+        match self {
+            SourceKind::Python(source) => source,
+            SourceKind::IpyNotebook(notebook) => notebook.source_code(),
+        }
+    }
+}