feat(natu): ignore imported let bindings

src/natu/scope_graph.rs

@@ -69,6 +69,7 @@ impl ScopeGraph {
                 declaration: self.add_declaration(&binding.key.name, scope),
                 name: binding.key.name.clone(),
                 references: Vec::new(),
+                is_import: is_import(&binding.value),
                 is_lambda: matches!(binding.value, ast::Expr::Lambda { .. }),
                 range: binding.range,
             })
@@ -191,6 +192,28 @@ impl ScopeGraph {
     }
 }
 
+fn is_import(expr: &ast::Expr) -> bool {
+    match unwrap_expr(expr) {
+        ast::Expr::Apply(application) => is_import_callee(&application.lambda),
+        _ => false,
+    }
+}
+
+fn is_import_callee(expr: &ast::Expr) -> bool {
+    match unwrap_expr(expr) {
+        ast::Expr::Apply(application) => is_import_callee(&application.lambda),
+        ast::Expr::Ident(ident) => ident.name == "import",
+        _ => false,
+    }
+}
+
+fn unwrap_expr(expr: &ast::Expr) -> &ast::Expr {
+    match expr {
+        ast::Expr::Other(expressions) if expressions.len() == 1 => unwrap_expr(&expressions[0]),
+        _ => expr,
+    }
+}
+
 #[derive(Debug)]
 enum Node {
     Scope(ScopeKind),
@@ -237,6 +260,7 @@ pub(crate) struct Binding {
     pub(crate) declaration: NodeId,
     pub(crate) name: String,
     pub(crate) references: Vec<NodeId>,
+    pub(crate) is_import: bool,
     pub(crate) is_lambda: bool,
     pub(crate) range: ast::SourceRange,
 }