Session name with number at end won't load

[borisjoffe]

tmux 2.3
tmuxp 1.2.2

Repro steps:

• Freeze a current tmux session
• Change session_name to test in the yaml file
• Duplicate the yaml file
• Change session_name to test2 in the duplicate file
• Use tmuxp to load test2 in a terminal window
• Use tmuxp to load test in a different window

Expected result:

• Both sessions load

Actual result:

• Second session shows message "test is already running. Attach?"
• If you try to attach to the session, it crashes with the following stacktrace:

Traceback (most recent call last):
  File "/bin/tmuxp", line 11, in <module>
    load_entry_point('tmuxp==1.2.2', 'console_scripts', 'tmuxp')()
  File "/usr/lib/python3.5/site-packages/click/core.py", line 716, in __call__
    return self.main(*args, **kwargs)
  File "/usr/lib/python3.5/site-packages/click/core.py", line 696, in main
    rv = self.invoke(ctx)
  File "/usr/lib/python3.5/site-packages/click/core.py", line 1060, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/lib/python3.5/site-packages/click/core.py", line 889, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/lib/python3.5/site-packages/click/core.py", line 534, in invoke
    return callback(*args, **kwargs)
  File "/usr/lib/python3.5/site-packages/click/decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/usr/lib/python3.5/site-packages/tmuxp/cli.py", line 511, in command_load
    load_workspace(config[-1], **tmux_options)
  File "/usr/lib/python3.5/site-packages/tmuxp/cli.py", line 253, in load_workspace
    reattach(builder.session)
  File "/usr/lib/python3.5/site-packages/tmuxp/cli.py", line 244, in reattach
    session.attach_session()
AttributeError: 'NoneType' object has no attribute 'attach_session'

#132 was a similar issue except with dots instead of numbers

Also, if the number is within the session_name, it works correctly, and if test is loaded before test2, it also works correctly.

[BlitzKraft]

I have a similar issue, when the window title is empty.

Traceback (most recent call last):
  File "/usr/local/bin/tmuxp", line 11, in <module>
    load_entry_point('tmuxp==1.2.2', 'console_scripts', 'tmuxp')()
  File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 716, in __call__
    return self.main(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 696, in main
    rv = self.invoke(ctx)
  File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 1060, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 889, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 534, in invoke
    return callback(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/click/decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/tmuxp/cli.py", line 511, in command_load
    load_workspace(config[-1], **tmux_options)
  File "/usr/local/lib/python2.7/dist-packages/tmuxp/cli.py", line 221, in load_workspace
    sconfig = config.expand(sconfig, os.path.dirname(config_file))
  File "/usr/local/lib/python2.7/dist-packages/tmuxp/config.py", line 265, in expand
    expand(window, parent=sconf) for window in sconf['windows']
  File "/usr/local/lib/python2.7/dist-packages/tmuxp/config.py", line 193, in expand
    sconf['window_name'] = expandshell(sconf['window_name'])
  File "/usr/local/lib/python2.7/dist-packages/tmuxp/config.py", line 117, in expandshell
    return os.path.expandvars(os.path.expanduser(_path))
  File "/usr/lib/python2.7/posixpath.py", line 261, in expanduser
    if not path.startswith('~'):
AttributeError: 'NoneType' object has no attribute 'startswith'

[BlitzKraft]

I found a work-around by running tmux rename-window '' in one of the panes in the specified window. That works for me. Not as elegant, but achieves what I want.

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