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1d15b22037
In bug #934732, Sven Wegener requested for bash to refrain from setting
the "internal" window title. That is, the window title (%t) of GNU
screen and the window_name (#W) of tmux. A patch was attached to the
bug, which I acknowledged and which was subsequently applied by Sven.
Unfortunately - and perhaps owing to my eagerness to have the matter be
resolved - I did not notice that the patch introduces a regression. The
regression is that both screen and tmux are no longer exempted from the
sshd(8) check, resulting in neither the hardstatus (%h) being set for
the former, nor the pane_title (#T) for the latter. This commit restores
the intended behaviour.
In comment #10 of bug #550104, Heui-mun Park makes a compelling case
that the "\033]0;" variant of the Set Text Parameters sequence should be
preferred over other variants. The difference is that it sets the "icon
name" in addition to the "window title". Indeed, I have found that most
applications that employ the sequence make use of this more
comprehensive variant. For many users, such a distinction would amount
to being little more than an artifact of history. Nevertheless, it makes
perfect sense for 10-gentoo-title.bash to be aligned with the practices
of others in this regard. Make it so.
Improve the commentary in 10-gentoo-title.bash, along with the accuracy
and utility of the information conveyed by the ewarn comands in the
ebuilds.
Have the live ebuild (version 9999) install 15-gentoo-bashrc-check.bash,
just as the other recent ebuilds do. It's simpler from a maintenance
standpoint for there to be as few differences between them as is
possible.
Fixes: 9ff9f8199c
Signed-off-by: Kerin Millar <kfm@plushkava.net>
Signed-off-by: Sam James <sam@gentoo.org>
52 lines
1.9 KiB
Bash
52 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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