import: add "beta feature" warning

dvc/command/imp.py

@@ -12,6 +12,11 @@ logger = logging.getLogger(__name__)
 
 class CmdImport(CmdBase):
     def run(self):
+        logger.warn(
+            "This is a beta feature! Do not use in the production! Old "
+            "`dvc import` is now called `dvc import-url`, please use "
+            "it instead."
+        )
         try:
             self.repo.imp(
                 self.args.url,
@@ -31,7 +36,8 @@ class CmdImport(CmdBase):
 
 def add_parser(subparsers, parent_parser):
     IMPORT_HELP = (
-        "Download data from DVC repository and take it under DVC control."
+        "BETA: Download data from DVC repository and take it under DVC "
+        "control."
     )
 
     import_parser = subparsers.add_parser(