tmuxp: ValueError: Server.colors must equal 88 or 256

Step 1: Provide a summary of your problem

• Example command breaking on fresh install, running tmuxp load mysession with the 4-pane-split configuration is returning the following error:

Traceback (most recent call last):
  File "/Users/trajano/Library/Python/3.9/bin/tmuxp", line 8, in <module>
    sys.exit(cli.cli())
  File "/Users/trajano/Library/Python/3.9/lib/python/site-packages/click/core.py", line 1025, in __call__
    return self.main(*args, **kwargs)
  File "/Users/trajano/Library/Python/3.9/lib/python/site-packages/click/core.py", line 955, in main
    rv = self.invoke(ctx)
  File "/Users/trajano/Library/Python/3.9/lib/python/site-packages/click/core.py", line 1517, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Users/trajano/Library/Python/3.9/lib/python/site-packages/click/core.py", line 1279, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/Users/trajano/Library/Python/3.9/lib/python/site-packages/click/core.py", line 710, in invoke
    return callback(*args, **kwargs)
  File "/Users/trajano/Library/Python/3.9/lib/python/site-packages/click/decorators.py", line 18, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/Users/trajano/Library/Python/3.9/lib/python/site-packages/tmuxp/cli.py", line 959, in command_load
    load_workspace(config[-1], **tmux_options)
  File "/Users/trajano/Library/Python/3.9/lib/python/site-packages/tmuxp/cli.py", line 555, in load_workspace
    if builder.session_exists(session_name):
  File "/Users/trajano/Library/Python/3.9/lib/python/site-packages/tmuxp/workspacebuilder.py", line 102, in session_exists
    exists = self.server.has_session(session_name)
  File "/Users/trajano/Library/Python/3.9/lib/python/site-packages/libtmux/server.py", line 373, in has_session
    proc = self.cmd('has-session', '-t%s' % target_session)
  File "/Users/trajano/Library/Python/3.9/lib/python/site-packages/libtmux/server.py", line 128, in cmd
    raise ValueError('Server.colors must equal 88 or 256')
ValueError: Server.colors must equal 88 or 256

It looks like args.colors is set to a type of string which does not match the given color options. Looked into it and it seems like it’s due to tmuxp pulling the pre-release version of click (8.0.0a1). I manually cloned the 7.1.2 to my site-packages and it’s working again.

Need to either cast type (to be safe) and/or fix click constraint. I’m not super familiar with python but let me know if you would like me to get a pr out for this. Thanks!

Step 2: Provide tmuxp details

-------------------------
environment:
	dist: macOS-10.15.4-x86_64-i386-64bit
	arch: x86_64
	uname: Darwin; Mauricios-MacBook-Pro.local; 19.4.0
	version: Darwin Kernel Version 19.4.0: Wed Mar  4 22:28:40 PST 2020; root:xnu-6153.101.6~15/RELEASE_X86_64
-------------------------
python version: 3.9.0 (default, Nov 21 2020, 14:01:50)  [Clang 12.0.0 (clang-1200.0.32.27)]
system PATH: /Users/trajano/.nvm/versions/node/v12.18.2/bin:/Users/trajano/bin:/usr/local/bin:Library/Python/3.9/bin:/Users/trajano/.cargo/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Applications/VMware Fusion.app/Contents/Public:/usr/local/go/bin:/Library/Frameworks/Mono.framework/Versions/Current/Commands:/Users/trajano/.composer/vendor/bin:/Users/trajano/.cargo/bin
tmux version: 3.1
libtmux version: 0.8.5
tmuxp version: 1.6.3
tmux path: /usr/local/bin/tmux
tmuxp path: /Users/trajano/Library/Python/3.9/lib/python/site-packages/tmuxp/__init__.py
shell: /bin/zsh
-------------------------

Step 3: Describe the problem:

Steps to reproduce:

1. Fresh install on macOS X
2. Copy sample 4-pane-split config and try to load sample session

Observed Results:

• Crashed with ValueError: Server.colors must equal 88 or 256

Expected Results:

• Loads session with the correct config

Relevant Code:

N/A