tmux indicates its RGB support via setrgbb and setrgbf. In modern tmux
code, Tc and RGB just set setrgbb and setrgbf, so we can just check for
them.
Link: 7eb496c00c
(cherry picked from commit 88eb0ad149)
Co-authored-by: Tristan Partin <tristan@partin.io>
Problem:
`:checkhealth nvim` warns about missing vimrc if `init.lua` exists but
`init.vim` does not.
Solution:
Check for any of: init.vim, init.lua, $MYVIMRC.
Fix#25291
Backport of https://github.com/neovim/neovim/pull/25306
In a few places ipairs was used to iterate over elements of the array.
However, the first return value of ipairs was erronously used, which is
not the value, but rather the index. This would result in errors, for
instance when trying to retrieve a field from the value.
This value can not be relied on as it doesn't work for
multi-configuration generators. I don't think this undocumented option
is used much, if at all, so I think we should remove it.
Problem: On tmux v3.2+, the `terminal-features` option may be used to enable RGB
capabilities over `terminal-overrides`. However, `show-messages` cannot be used
to detect if RGB capabilities are enabled using `terminal-features`.
Solution: Try to use `display-message -p #{client_termfeatures}` instead.
The returned features include "RGB" if either "RGB" is set in
`terminal-features`, or if "Tc" or "RGB" is set in `terminal-overrides` (as
before).
Nothing is returned by tmux versions older than v3.2, so fallback to checking
`show-messages` in that case.
Also, un-Vimscriptify the previous logic a bit, and change the error message to
point to using the `terminal-features` option instead for newer tmux versions.
Regression from the health.vim to .lua changes.
Unlike Vim script, Lua does not implicitly convert strings to numbers, so this
comparison threw an error.
- If Nvim was just started, don't create a new tab.
- Name the buffer "health://".
- Use "help" syntax instead of "markdown". It fits better, and
eliminates various workarounds.
- Simplfy formatting, avoid visual noise.
- Don't print a "INFO" status, it is noisy.
- Drop the ":" after statuses, they are already UPPERCASE and highlighted.
