Add option to disable internal transforms

Reviewed By: davidaurelio

Differential Revision: D2815307

fb-gh-sync-id: 17ed8f13de7b4c41111efa4a5f2af5283e6ef3e0

react-packager/src/Bundler/index.js

@@ -80,6 +80,10 @@ const validateOpts = declareOpts({
     type: 'number',
     required: false,
   },
+  disableInternalTransforms: {
+    type: 'boolean',
+    default: false,
+  },
 });
 
 class Bundler {
@@ -131,6 +135,7 @@ class Bundler {
       blacklistRE: opts.blacklistRE,
       cache: this._cache,
       transformModulePath: opts.transformModulePath,
+      disableInternalTransforms: opts.disableInternalTransforms,
     });
 
     this._projectRoots = opts.projectRoots;

react-packager/src/JSTransformer/index.js

@@ -54,6 +54,10 @@ const validateOpts = declareOpts({
     type: 'number',
     default: DEFAULT_MAX_CALL_TIME,
   },
+  disableInternalTransforms: {
+    type: 'boolean',
+    default: false,
+  },
 });
 
 class Transformer {
@@ -64,7 +68,12 @@ class Transformer {
     this._transformModulePath = opts.transformModulePath;
 
     if (opts.transformModulePath != null) {
-      this._workerWrapperPath = temp.path();
+      let transformer;
+
+      if (opts.disableInternalTransforms) {
+        transformer = opts.transformModulePath;
+      } else {
+        transformer = this._workerWrapperPath = temp.path();
         fs.writeFileSync(
           this._workerWrapperPath,
           `
@@ -72,6 +81,7 @@ class Transformer {
           require(${JSON.stringify(String(opts.transformModulePath))});
           `
         );
+      }
 
       this._workers = workerFarm({
         autoStart: true,
@@ -79,7 +89,7 @@ class Transformer {
         maxCallsPerWorker: MAX_CALLS_PER_WORKER,
         maxCallTime: opts.transformTimeoutInterval,
         maxRetries: MAX_RETRIES,
-      }, this._workerWrapperPath);
+      }, transformer);
 
       this._transform = Promise.denodeify(this._workers);
     }
@@ -87,7 +97,8 @@ class Transformer {
 
   kill() {
     this._workers && workerFarm.end(this._workers);
-    if (typeof this._workerWrapperPath === 'string') {
+    if (this._workerWrapperPath &&
+        typeof this._workerWrapperPath === 'string') {
       fs.unlink(this._workerWrapperPath, () => {}); // we don't care about potential errors here
     }
   }

react-packager/src/Server/index.js

@@ -67,7 +67,11 @@ const validateOpts = declareOpts({
   getTransformOptionsModulePath: {
     type: 'string',
     required: false,
-  }
+  },
+  disableInternalTransforms: {
+    type: 'boolean',
+    default: false,
+  },
 });
 
 const bundleOpts = declareOpts({