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feat(health): detect tmux RGB support via client_termfeatures

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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.
This commit is contained in:
Sean Dewar 2023-01-16 13:25:11 +00:00
parent 60df0c0651
commit 7e24c45221
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GPG Key ID: 08CC2C83AD41B581
1 changed files with 18 additions and 11 deletions
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29
runtime/lua/nvim/health.lua
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@ -326,17 +326,24 @@ local function check_tmux()
end
-- check for RGB capabilities
local info = vim.fn.system({ 'tmux', 'show-messages', '-JT' })
local has_tc = vim.fn.stridx(info, ' Tc: (flag) true') ~= -1
local has_rgb = vim.fn.stridx(info, ' RGB: (flag) true') ~= -1
if not has_tc and not has_rgb then
health.report_warn(
"Neither Tc nor RGB capability set. True colors are disabled. |'termguicolors'| won't work properly.",
{
"Put this in your ~/.tmux.conf and replace XXX by your $TERM outside of tmux:\nset-option -sa terminal-overrides ',XXX:RGB'",
"For older tmux versions use this instead:\nset-option -ga terminal-overrides ',XXX:Tc'",
}
)
local info = vim.fn.system({ 'tmux', 'display-message', '-p', '#{client_termfeatures}' })
info = vim.split(vim.trim(info), ',', { trimempty = true })
if not vim.tbl_contains(info, 'RGB') then
local has_rgb = false
if #info == 0 then
-- client_termfeatures may not be supported; fallback to checking show-messages
info = vim.fn.system({ 'tmux', 'show-messages', '-JT' })
has_rgb = info:find(' Tc: (flag) true', 1, true) or info:find(' RGB: (flag) true', 1, true)
end
if not has_rgb then
health.report_warn(
"Neither Tc nor RGB capability set. True colors are disabled. |'termguicolors'| won't work properly.",
{
"Put this in your ~/.tmux.conf and replace XXX by your $TERM outside of tmux:\nset-option -sa terminal-features ',XXX:RGB'",
"For older tmux versions use this instead:\nset-option -ga terminal-overrides ',XXX:Tc'",
}
)
end
end
end