[core][rewriter] hide destructure rewrites behind a flag

Author: velzie

rewriter/js/src/cfg.rs

@@ -37,4 +37,5 @@ pub struct Flags {
 	pub scramitize: bool,
 	pub do_sourcemaps: bool,
 	pub strict_rewrites: bool,
+	pub destructure_rewrites: bool,
 }

rewriter/js/src/visitor.rs

@@ -414,6 +414,10 @@ where
 	}
 
 	fn visit_binding_pattern(&mut self, it: &BindingPattern<'data>) {
+	    if !self.flags.destructure_rewrites {
+			return;
+		}
+
 		match &it.kind {
 			BindingPatternKind::BindingIdentifier(p) => {
 				// let a = 0;
@@ -498,6 +502,10 @@ where
 				walk::walk_expression(self, &s.expression);
 			}
 			AssignmentTarget::ObjectAssignmentTarget(o) => {
+			    if !self.flags.destructure_rewrites {
+					return;
+				}
+
 				let mut restids: Vec<Atom<'data>> = Vec::new();
 				self.recurse_object_assignment_target(o, &mut restids);
 

rewriter/native/src/main.rs

@@ -57,6 +57,8 @@ pub struct RewriterOptions {
 	scramitize: bool,
 	#[clap(long, default_value_t = false)]
 	strict_rewrites: bool,
+	#[clap(long, default_value_t = false)]
+	destructure_rewrites: bool,
 }
 
 impl Default for RewriterOptions {

rewriter/native/src/rewriter.rs

@@ -90,6 +90,7 @@ impl NativeRewriter {
 					do_sourcemaps: cfg.do_sourcemaps,
 					scramitize: cfg.scramitize,
 					strict_rewrites: cfg.strict_rewrites,
+					destructure_rewrites: cfg.destructure_rewrites,
 				},
 			)
 			.context("failed to rewrite file")

src/controller/index.ts

@@ -43,6 +43,7 @@ export class ScramjetController {
 				cleanErrors: false,
 				scramitize: false,
 				sourcemaps: true,
+				destructureRewrites: false,
 			},
 			siteFlags: {},
 			codec: {

src/types.ts

@@ -13,6 +13,7 @@ export type ScramjetFlags = {
 	cleanErrors: boolean;
 	scramitize: boolean;
 	sourcemaps: boolean;
+	destructureRewrites: boolean;
 };
 
 export interface ScramjetConfig {