Handle upload_flags option in platformio.ini // Resolve #368

platformio/builder/main.py

@@ -76,7 +76,8 @@ commonvars.AddVariables(
     # upload options
     ("UPLOAD_PORT",),
     ("UPLOAD_PROTOCOL",),
-    ("UPLOAD_SPEED",)
+    ("UPLOAD_SPEED",),
+    ("UPLOAD_FLAGS",)
 )
 
 DefaultEnvironment(
@@ -161,6 +162,9 @@ env.SConscriptChdir(0)
 env.SConsignFile(join("$PIOENVS_DIR", ".sconsign.dblite"))
 env.SConscript("$BUILD_SCRIPT")
 
+if "UPLOAD_FLAGS" in env:
+    env.Append(UPLOADERFLAGS=["$UPLOAD_FLAGS"])
+
 if environ.get("PLATFORMIO_EXTRA_SCRIPT", env.get("EXTRA_SCRIPT")):
     env.SConscript(
         environ.get("PLATFORMIO_EXTRA_SCRIPT", env.get("EXTRA_SCRIPT")))