refactor(traverse): move generated files into separate folder (#5115)

Move generated files in `oxc_traverse` crate into separate folder, to match `ast_tools`.

Also amend the header on generated files to match files generated by `ast_tools`.

crates/oxc_traverse/scripts/build.mjs

@@ -22,11 +22,13 @@ import generateWalkFunctionsCode from './lib/walk.mjs';
 
 const execAsync = promisify(exec);
 
-const PREAMBLE = '// Generated by `scripts/build.mjs`.\n\n';
+const PREAMBLE = '// Auto-generated code, DO NOT EDIT DIRECTLY!\n'
+    + '// Generated by `oxc_traverse/scripts/build.mjs`.\n'
+    + '// To alter this generated file you have to edit the codegen.\n\n';
 
 const types = await getTypesFromCode();
 
-const outputDirPath = pathJoin(fileURLToPath(import.meta.url), '../../src');
+const outputDirPath = pathJoin(fileURLToPath(import.meta.url), '../../src/generated');
 await writeToFile('traverse.rs', generateTraverseTraitCode(types));
 await writeToFile('ancestor.rs', generateAncestorsCode(types));
 await writeToFile('walk.rs', generateWalkFunctionsCode(types));

crates/oxc_traverse/src/generated/ancestor.rs

@@ -1,4 +1,6 @@
-// Generated by `scripts/build.mjs`.
+// Auto-generated code, DO NOT EDIT DIRECTLY!
+// Generated by `oxc_traverse/scripts/build.mjs`.
+// To alter this generated file you have to edit the codegen.
 
 #![allow(
     unsafe_code,

crates/oxc_traverse/src/generated/traverse.rs

@@ -1,4 +1,6 @@
-// Generated by `scripts/build.mjs`.
+// Auto-generated code, DO NOT EDIT DIRECTLY!
+// Generated by `oxc_traverse/scripts/build.mjs`.
+// To alter this generated file you have to edit the codegen.
 
 use oxc_allocator::Vec;
 #[allow(clippy::wildcard_imports)]

crates/oxc_traverse/src/generated/walk.rs

@@ -1,4 +1,6 @@
-// Generated by `scripts/build.mjs`.
+// Auto-generated code, DO NOT EDIT DIRECTLY!
+// Generated by `oxc_traverse/scripts/build.mjs`.
+// To alter this generated file you have to edit the codegen.
 
 #![allow(
     unsafe_code,

crates/oxc_traverse/src/lib.rs

@@ -64,14 +64,18 @@ use oxc_allocator::Allocator;
 use oxc_ast::ast::Program;
 use oxc_semantic::{ScopeTree, SymbolTable};
 
-pub mod ancestor;
-pub use ancestor::Ancestor;
 mod context;
 pub use context::{TraverseAncestry, TraverseCtx, TraverseScoping};
-#[allow(clippy::module_inception)]
-mod traverse;
-pub use traverse::Traverse;
-mod walk;
+
+mod generated {
+    pub mod ancestor;
+    pub mod traverse;
+    pub(super) mod walk;
+}
+pub use generated::ancestor;
+pub use generated::ancestor::Ancestor;
+pub use generated::traverse::Traverse;
+use generated::walk;
 
 mod compile_fail_tests;