Layout option / panes not being sent through to tmux

[JonRowe]

Using the latest version of tmuxinator 0.11.2, panes and layout for a window doesn't do anything, project file:

project_name: td
project_root: ~/Code/TheProject/Dashboard
windows:
  - editor: vim
  - shell:
    layout: main-vertical
    panes:
      - git status
      - yarn run

Output:

#!/bin/bash

# Clear rbenv variables before starting tmux
unset RBENV_VERSION
unset RBENV_DIR

tmux start-server;

cd /Users/jon/Code/TheProject/Dashboard

# Run on_project_start command.


  # Run on_project_restart command.
  

  if [ -z "$TMUX" ]; then
    tmux -u attach-session -t td
  else
    tmux -u switch-client -t td
  fi


    
# Run on_project_exit command.

[ethagnawl]

Hi, @JonRowe.

Is this a new config file or is it one that was previously working and broke after upgrading to 0.11.2?

If it's a new config file, I think it's a whitespace issue. There are known problems with tmuxinator and whitespace, particularly with two space indentations (see #489).

Changing your sample to the following (which uses four space indentations) works as expected on my machine:

# ~/.tmuxinator/bug-y.yml

project_name: bug-y
project_root: ~/projects/tmuxinator
windows:
    - editor: vim
    - shell:
        layout: main-vertical
        panes:
            - git status
            - yarn run

I would love to get the whitespace issue sorted and, thanks to this report, it's back on my radar.

If this was a working config file which stopped working after the upgrade, that will require some additional investigation.

[JonRowe]

Ah yes, the whitespace was the issue, would you accept a PR noting this on the read me?

[ethagnawl]

That would be greatly appreciated.

[ethagnawl]

So, @JonRowe. I've determined this issue is actually YAML's fault. It's a quirk in how it handles the indentation of list/dictionary elements. Specifically, where the indentation actually begins. I've yet to find a definitive source (e.g. in the YAML spec) but I have found references to this issue in a few places.

Notice that while the indentation is two spaces per level, for the values under the context and defaults options there is a four-space indent. If only two spaces are used to indent, then those keys will be considered part of the same dictionary that contains the context key, and so the data will not be loaded correctly.

https://docs.saltstack.com/en/2017.7/topics/troubleshooting/yaml_idiosyncrasies.html

Block list items can (but don't need to) have the same indentation as the surrounding block level because "-" is considered part of the indentation

https://stackoverflow.com/a/42248984/382982

My own SO question about your use case.

I'm looking forward to seeing how you address this is your PR. Thanks, again, for the offer!

[ethagnawl]

Closed via #630.