I want to enable italics in tmux (inside iTerm2 on macOS Big Sur 11.3). I have achieved this by setting this in
set -g default-terminal "tmux-256color"
And I have installed ncurses 6.2 using homebrew and set it first in the path.
After those changes, italics work.
However, now several ncurses-dependent programs fail to start:
ncdu (1.15.1) and
nano (2.0.6 ) error out with:
Error opening terminal: tmux-256color.
I get the impression that they don't support this
TERM setting. Weirdly,
ncdu 1.12 works with
tmux-256color on my Raspbian computer.
What's wrong? Aren't programs like
nano supposed to be compatible with
I have found a hacky workaround (for macOS, not needed on Raspbian). If I explicitly change back the
TERM variable in
.zshrc, everything (both italics and programs) works:
if [[ "$TERM" == "tmux-256color" ]]; then export TERM=screen-256color fi
But my understanding is that setting
TERM yourself is a big no-no. You are supposed to let the environment set that correctly. And I'm surprised it works at all - is
tmux-256color compatible with
screen-256color? Will this hack blow up in my face eventually?