Try a fix #20

Author: tony

CHANGES

@@ -10,9 +10,12 @@ Here you can find the recent changes to tmuxp.
 ''''''''''
 
 - [cli] accept ``-y`` argument to answer yes to questions. `#19`_
+- [cli] :meth:`cli.SessionCompleter` no longer allows a duplicate session
+  after one is added.
 - [docs] ongoing work on :ref:`about_tmux`.
 
 .. _#19: https://github.com/tony/tmuxp/pull/19
+.. _#20: https://github.com/tony/tmuxp/issues/19
 
 2013-11-09
 ''''''''''

tmuxp/cli.py

@@ -165,9 +165,12 @@ def __call__(self, prefix, **kwargs):
         )
 
         tmuxinator_configs = config.in_dir(
-            tmuxinator_config_dir, extensions='yml')
-        completion += [os.path.join(tmuxinator_config_dir, f)
-                       for f in tmuxinator_configs]
+            tmuxinator_config_dir, extensions='yml'
+        )
+        completion += [
+            os.path.join(tmuxinator_config_dir, f)
+            for f in tmuxinator_configs
+        ]
 
         return completion
 
@@ -182,8 +185,10 @@ def __call__(self, prefix, **kwargs):
         )
 
         teamocil_configs = config.in_dir(teamocil_config_dir, extensions='yml')
-        completion += [os.path.join(teamocil_config_dir, f)
-                       for f in teamocil_configs]
+        completion += [
+            os.path.join(teamocil_config_dir, f)
+            for f in teamocil_configs
+        ]
 
         return completion
 
@@ -196,8 +201,18 @@ def SessionCompleter(prefix, parsed_args, **kwargs):
         socket_path=parsed_args.socket_path
     )
 
-    return [s.get('session_name') for s in t._sessions
-            if s.get('session_name').startswith(prefix)]
+    sessions_available = [
+        s.get('session_name') for s in t._sessions
+        if s.get('session_name').startswith(' '.join(prefix))
+    ]
+
+    if parsed_args.session_name and sessions_available:
+        return []
+
+    return [
+        s.get('session_name') for s in t._sessions
+        if s.get('session_name').startswith(prefix)
+    ]
 
 
 def setup_logger(logger=None, level='INFO'):