Move Swift language into its own module

unified/extractor/src/extractor.rs

@@ -3,7 +3,9 @@ use std::path::PathBuf;
 
 use codeql_extractor::extractor::simple;
 use codeql_extractor::trap;
-use yeast::{rule, DesugaringConfig};
+
+#[path = "languages/swift/swift.rs"]
+mod swift;
 
 #[derive(Args)]
 pub struct Options {
@@ -20,31 +22,13 @@ pub struct Options {
     file_list: PathBuf,
 }
 
-fn swift_desugaring_rules() -> Vec<yeast::Rule> {
-    vec![
-        rule!(
-            (additive_expression)
-            =>
-            (simple_identifier "blah")
-        ),
-    ]
-}
-
 pub fn run(options: Options) -> std::io::Result<()> {
     codeql_extractor::extractor::set_tracing_level("ql");
 
-    let swift_desugar = DesugaringConfig::new(swift_desugaring_rules());
-
     let extractor = simple::Extractor {
         prefix: "unified".to_string(),
         languages: vec![
-            simple::LanguageSpec {
-                prefix: "swift",
-                ts_language: tree_sitter_swift::LANGUAGE.into(),
-                node_types: tree_sitter_swift::NODE_TYPES,
-                file_globs: vec!["*.swift".into(), "*.swiftinterface".into()],
-                desugar: Some(swift_desugar),
-            },
+            swift::language_spec(),
         ],
         trap_dir: options.output_dir,
         trap_compression: trap::Compression::from_env("CODEQL_QL_TRAP_COMPRESSION"),

unified/extractor/src/languages/swift/swift.rs

@@ -0,0 +1,23 @@
+use codeql_extractor::extractor::simple;
+use yeast::{rule, DesugaringConfig};
+
+fn desugaring_rules() -> Vec<yeast::Rule> {
+    vec![
+        rule!(
+            (additive_expression)
+            =>
+            (simple_identifier "blah")
+        ),
+    ]
+}
+
+pub fn language_spec() -> simple::LanguageSpec {
+    let desugar = DesugaringConfig::new(desugaring_rules());
+    simple::LanguageSpec {
+        prefix: "swift",
+        ts_language: tree_sitter_swift::LANGUAGE.into(),
+        node_types: tree_sitter_swift::NODE_TYPES,
+        file_globs: vec!["*.swift".into(), "*.swiftinterface".into()],
+        desugar: Some(desugar),
+    }
+}