53 lines
1.9 KiB
Bash
53 lines
1.9 KiB
Bash
# /etc/bash/bashrc.d/10-gentoo-title.bash
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genfun_set_win_title() {
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# Assigns the basename of the current working directory, having
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# sanitised it with @Q parameter expansion. Useful for paths containing
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# newlines and such. As a special case, names consisting entirely of
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# graphemes shall not undergo the expansion, for reasons of cleanliness.
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genfun_sanitise_cwd() {
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_cwd=${PWD##*/}
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if [[ ! ${_cwd} ]]; then
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_cwd=${PWD}
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elif [[ ${_cwd} == *[![:graph:]]* ]]; then
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_cwd=${_cwd@Q}
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fi
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}
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# Sets the window title with the Set Text Parameters sequence. For
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# screen, the sequence defines the hardstatus (%h) and for tmux, the
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# pane_title (#T). For graphical terminal emulators, it is normal for
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# the title bar to be affected.
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genfun_set_win_title() {
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genfun_sanitise_cwd
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printf '\033]0;%s@%s - %s\007' "${USER}" "${HOSTNAME%%.*}" "${_cwd}"
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}
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genfun_set_win_title
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}
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# Proceed no further if the TTY is that of sshd(8) and if not running a terminal
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# multiplexer. Alas, there exist many operating environments in which the window
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# title would otherwise not be restored upon ssh(1) exiting. Those who wish for
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# the title to be set unconditionally may adjust ~/.bashrc - or create a custom
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# bashrc.d drop-in - to define PROMPT_COMMAND=(genfun_set_win_title).
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if [[ ${SSH_TTY} && ${TERM} != @(screen|tmux)* && ${SSH_TTY} == "$(tty)" ]]; then
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return
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fi
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# Determine whether the terminal can handle the Set Text Parameters sequence.
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# The only terminals permitted here are those for which there is empirical
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# evidence that the sequence is supported and that the UTF-8 character encoding
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# is handled correctly. Quite rightly, this precludes many vintage terminals.
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# https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
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case ${TERM} in
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alacritty |\
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foot* |\
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rxvt-unicode* |\
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screen* |\
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st-256color |\
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tmux* |\
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xterm* )
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PROMPT_COMMAND+=('genfun_set_win_title')
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esac
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