feat(napi/transform): add inject plugin (#6250)

napi/transform/Cargo.toml

@@ -32,6 +32,8 @@ oxc_sourcemap = { workspace = true }
 oxc_span = { workspace = true }
 oxc_transformer = { workspace = true }
 
+rustc-hash = { workspace = true }
+
 napi = { workspace = true }
 napi-derive = { workspace = true }
 

napi/transform/index.d.ts

@@ -205,6 +205,8 @@ export interface TransformOptions {
   es2015?: ES2015BindingOptions
   /** Define Plugin */
   define?: Record<string, string>
+  /** Inject Plugin */
+  inject?: Record<string, string | [string, string]>
 }
 
 export interface TransformResult {

napi/transform/src/options.rs

@@ -1,11 +1,11 @@
 #![allow(rustdoc::bare_urls)]
-#![allow(clippy::disallowed_types)] // allow HashMap
 
-use std::collections::HashMap;
 use std::path::PathBuf;
 
 use napi::Either;
 use napi_derive::napi;
+use rustc_hash::FxHashMap;
+
 use oxc_transformer::{ArrowFunctionsOptions, ES2015Options, JsxRuntime, RewriteExtensionsMode};
 
 use crate::IsolatedDeclarationsOptions;
@@ -42,7 +42,12 @@ pub struct TransformOptions {
     pub es2015: Option<ES2015BindingOptions>,
 
     /// Define Plugin
-    pub define: Option<HashMap<String, String>>,
+    #[napi(ts_type = "Record<string, string>")]
+    pub define: Option<FxHashMap<String, String>>,
+
+    /// Inject Plugin
+    #[napi(ts_type = "Record<string, string | [string, string]>")]
+    pub inject: Option<FxHashMap<String, Either<String, Vec<String>>>>,
 }
 
 impl From<TransformOptions> for oxc_transformer::TransformOptions {

napi/transform/src/transformer.rs

@@ -1,9 +1,15 @@
+use napi::Either;
 use napi_derive::napi;
+use rustc_hash::FxHashMap;
+
 use oxc_allocator::Allocator;
 use oxc_codegen::CodegenReturn;
-use oxc_semantic::SemanticBuilder;
+use oxc_semantic::{ScopeTree, SemanticBuilder, SymbolTable};
 use oxc_span::SourceType;
-use oxc_transformer::{ReplaceGlobalDefines, ReplaceGlobalDefinesConfig, Transformer};
+use oxc_transformer::{
+    InjectGlobalVariables, InjectGlobalVariablesConfig, InjectImport, ReplaceGlobalDefines,
+    ReplaceGlobalDefinesConfig, Transformer,
+};
 
 use crate::{context::TransformContext, isolated_declaration, SourceMap, TransformOptions};
 
@@ -107,6 +113,7 @@ fn transpile(ctx: &TransformContext<'_>, options: Option<TransformOptions>) -> C
 
     let mut options = options;
     let define = options.as_mut().and_then(|options| options.define.take());
+    let inject = options.as_mut().and_then(|options| options.inject.take());
 
     let options = options.map(oxc_transformer::TransformOptions::from).unwrap_or_default();
 
@@ -126,22 +133,72 @@ fn transpile(ctx: &TransformContext<'_>, options: Option<TransformOptions>) -> C
     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);
-            }
-        }
+        (symbols, scopes) = define_plugin(ctx, define, symbols, scopes);
+    }
+
+    if let Some(inject) = inject {
+        _ = inject_plugin(ctx, inject, symbols, scopes);
     }
 
     ctx.codegen().build(&ctx.program())
 }
+
+fn define_plugin(
+    ctx: &TransformContext<'_>,
+    define: FxHashMap<String, String>,
+    symbols: SymbolTable,
+    scopes: ScopeTree,
+) -> (SymbolTable, ScopeTree) {
+    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(),
+            );
+            (ret.symbols, ret.scopes)
+        }
+        Err(errors) => {
+            ctx.add_diagnostics(errors);
+            (symbols, scopes)
+        }
+    }
+}
+
+fn inject_plugin(
+    ctx: &TransformContext<'_>,
+    inject: FxHashMap<String, Either<String, Vec<String>>>,
+    symbols: SymbolTable,
+    scopes: ScopeTree,
+) -> (SymbolTable, ScopeTree) {
+    let Ok(injects) = inject
+        .into_iter()
+        .map(|(local, value)| match value {
+            Either::A(source) => Ok(InjectImport::default_specifier(&source, &local)),
+            Either::B(v) => {
+                if v.len() != 2 {
+                    return Err(());
+                }
+                let source = v[0].to_string();
+                Ok(if v[1] == "*" {
+                    InjectImport::namespace_specifier(&source, &local)
+                } else {
+                    InjectImport::named_specifier(&source, Some(&v[1]), &local)
+                })
+            }
+        })
+        .collect::<Result<Vec<_>, ()>>()
+    else {
+        return (symbols, scopes);
+    };
+
+    let config = InjectGlobalVariablesConfig::new(injects);
+    let ret = InjectGlobalVariables::new(ctx.allocator, config).build(
+        symbols,
+        scopes,
+        &mut ctx.program_mut(),
+    );
+
+    (ret.symbols, ret.scopes)
+}

napi/transform/test.mjs

@@ -83,4 +83,29 @@ test(
   },
 );
 
+// Test define plugin
+// TODO: should be constant folded
+test(
+  oxc.transform('test.ts', 'if (process.env.NODE_ENV === "production") { foo; }', {
+    define: {
+      'process.env.NODE_ENV': 'false',
+    },
+  }),
+  {
+    code: 'if (false === "production") {\n\tfoo;\n}\n',
+  },
+);
+
+// Test inject plugin
+test(
+  oxc.transform('test.ts', 'let _ = Object.assign', {
+    inject: {
+      'Object.assign': 'foo',
+    },
+  }),
+  {
+    code: 'import $inject_Object_assign from "foo";\nlet _ = $inject_Object_assign;\n',
+  },
+);
+
 console.log('Success.');