Convert CleanPioEnvsError to warning

platformio/commands/run.py

@@ -57,7 +57,12 @@ def cli(ctx, environment, target, upload_port,  # pylint: disable=R0913,R0914
             try:
                 _clean_pioenvs_dir(util.get_pioenvs_dir())
             except Exception:
-                raise exception.CleanPioenvsDirError(util.get_pioenvs_dir())
+                click.secho(
+                    "Can not remove temporary directory `%s`. Please remove "
+                    "`.pioenvs` directory from the project manually to avoid "
+                    "build issues" % util.get_pioenvs_dir(),
+                    fg="yellow"
+                )
 
         results = []
         for section in config.sections():

platformio/exception.py

@@ -129,12 +129,6 @@ class UnknownEnvNames(PlatformioException):
     MESSAGE = "Unknown environment names '{0}'. Valid names are '{1}'"
 
 
-class CleanPioenvsDirError(PlatformioException):
-
-    MESSAGE = "Can not remove temporary directory `{0}`. "\
-        "Please remove it manually"
-
-
 class GetSerialPortsError(PlatformioException):
 
     MESSAGE = "No implementation for your platform ('{0}') available"