Good way to stylize some items?

[rieje]

I have a tmux-sessionizer script that lists sessions which include both running sessions and pre-defined sessions (start a session with a pre-defined layout). I want to differentiate the running sessions that get listed first.

I'm not a fan of adding additional text e.g. prepending/appending running session names with an asterisk because it messes up the formatting/readability. Adding a ------ to the menu is also not ideal because that is an item itself.

Ideally there's a way to stylize a subset of items without introducing added text/items, e.g. coloring these items (assuming you can do that and I'm not sure if parsing the selection needs to account for that) or the gutter next to these items.

[agammann]

Color the running rows with ANSI escapes and pass --ansi to fzf. For Bash:

{
  for session in "${running_sessions[@]}"; do
    printf '\033[32m%s\033[0m\n' "$session"
  done
  for session in "${saved_sessions[@]}"; do
    printf '%s\n' "$session"
  done
} | fzf --ansi --no-sort

--ansi renders the color but strips escape codes from the selected output, so the name you parse stays plain text. I checked this on fzf 0.74.4. --no-sort keeps running rows at the top.