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fix(health): fix tmux RGB capability detection (#26886) (#26887)

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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>
This commit is contained in:
Gregory Anders 2024-01-04 18:15:04 -06:00 committed by GitHub
parent ea3966aac9
commit b587aff176
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 11 additions and 18 deletions
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29
runtime/lua/nvim/health.lua
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@ -327,24 +327,17 @@ local function check_tmux()
end
-- check for RGB capabilities
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
local info = vim.fn.system({ 'tmux', 'show-messages', '-T' })
local has_setrgbb = vim.fn.stridx(info, ' setrgbb: (string)') ~= -1
local has_setrgbf = vim.fn.stridx(info, ' setrgbf: (string)') ~= -1
if not has_setrgbb or not has_setrgbf then
health.warn(
"True color support could not be detected. |'termguicolors'| won't work properly.",
{
"Add the following to your tmux configuration file, replacing XXX by the value of $TERM outside of tmux:\nset-option -a terminal-features 'XXX:RGB'",
"For older tmux versions use this instead:\nset-option -a terminal-overrides 'XXX:Tc'",
}
)
end
end