feat(napi/transform): add define option (#6212)

part of #6156

Author: Boshen

napi/transform/index.d.ts

@@ -187,12 +187,6 @@ export interface TransformOptions {
    * options.
    */
   cwd?: string
-  /** Configure how TypeScript is transformed. */
-  typescript?: TypeScriptOptions
-  /** Configure how TSX and JSX are transformed. */
-  jsx?: JsxOptions
-  /** Enable ES2015 transformations. */
-  es2015?: ES2015BindingOptions
   /**
    * Enable source map generation.
    *
@@ -203,6 +197,14 @@ export interface TransformOptions {
    * @see {@link SourceMap}
    */
   sourcemap?: boolean
+  /** Configure how TypeScript is transformed. */
+  typescript?: TypeScriptOptions
+  /** Configure how TSX and JSX are transformed. */
+  jsx?: JsxOptions
+  /** Enable ES2015 transformations. */
+  es2015?: ES2015BindingOptions
+  /** Define Plugin */
+  define?: Record<string, string>
 }
 
 export interface TransformResult {

napi/transform/src/options.rs

@@ -1,5 +1,7 @@
 #![allow(rustdoc::bare_urls)]
+#![allow(clippy::disallowed_types)] // allow HashMap
 
+use std::collections::HashMap;
 use std::path::PathBuf;
 
 use napi::Either;
@@ -21,6 +23,15 @@ pub struct TransformOptions {
     /// options.
     pub cwd: Option<String>,
 
+    /// Enable source map generation.
+    ///
+    /// When `true`, the `sourceMap` field of transform result objects will be populated.
+    ///
+    /// @default false
+    ///
+    /// @see {@link SourceMap}
+    pub sourcemap: Option<bool>,
+
     /// Configure how TypeScript is transformed.
     pub typescript: Option<TypeScriptOptions>,
 
@@ -30,14 +41,8 @@ pub struct TransformOptions {
     /// Enable ES2015 transformations.
     pub es2015: Option<ES2015BindingOptions>,
 
-    /// Enable source map generation.
-    ///
-    /// When `true`, the `sourceMap` field of transform result objects will be populated.
-    ///
-    /// @default false
-    ///
-    /// @see {@link SourceMap}
-    pub sourcemap: Option<bool>,
+    /// Define Plugin
+    pub define: Option<HashMap<String, String>>,
 }
 
 impl From<TransformOptions> for oxc_transformer::TransformOptions {

napi/transform/src/transformer.rs

@@ -3,7 +3,7 @@ use oxc_allocator::Allocator;
 use oxc_codegen::CodegenReturn;
 use oxc_semantic::SemanticBuilder;
 use oxc_span::SourceType;
-use oxc_transformer::Transformer;
+use oxc_transformer::{ReplaceGlobalDefines, ReplaceGlobalDefinesConfig, Transformer};
 
 use crate::{context::TransformContext, isolated_declaration, SourceMap, TransformOptions};
 
@@ -105,9 +105,13 @@ fn transpile(ctx: &TransformContext<'_>, options: Option<TransformOptions>) -> C
         .build(&ctx.program());
     ctx.add_diagnostics(semantic_ret.errors);
 
+    let mut options = options;
+    let define = options.as_mut().and_then(|options| options.define.take());
+
     let options = options.map(oxc_transformer::TransformOptions::from).unwrap_or_default();
 
-    let (symbols, scopes) = semantic_ret.semantic.into_symbol_table_and_scope_tree();
+    let (mut symbols, mut scopes) = semantic_ret.semantic.into_symbol_table_and_scope_tree();
+
     let ret = Transformer::new(
         ctx.allocator,
         ctx.file_path(),
@@ -117,8 +121,27 @@ fn transpile(ctx: &TransformContext<'_>, options: Option<TransformOptions>) -> C
         options,
     )
     .build_with_symbols_and_scopes(symbols, scopes, &mut ctx.program_mut());
-
     ctx.add_diagnostics(ret.errors);
+    symbols = ret.symbols;
+    scopes = ret.scopes;
+
+    if let Some(define) = define {
+        let define = define.into_iter().collect::<Vec<_>>();
+        match ReplaceGlobalDefinesConfig::new(&define) {
+            Ok(config) => {
+                let _ret = ReplaceGlobalDefines::new(ctx.allocator, config).build(
+                    symbols,
+                    scopes,
+                    &mut ctx.program_mut(),
+                );
+                // symbols = ret.symbols;
+                // scopes = ret.scopes;
+            }
+            Err(errors) => {
+                ctx.add_diagnostics(errors);
+            }
+        }
+    }
 
     ctx.codegen().build(&ctx.program())
 }