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# Some of the most useful features in emacs-libvterm require shell-side
# configurations. The main goal of these additional functions is to enable the
# shell to send information to `vterm` via properly escaped sequences. A
# function that helps in this task, `vterm_printf`, is defined below.
function vterm_printf(){
if [ -n "$TMUX" ] && ([ "${TERM%%-*}" = "tmux" ] || [ "${TERM%%-*}" = "screen" ] ); then
# Tell tmux to pass the escape sequences through
printf "\ePtmux;\e\e]%s\007\e\\" "$1"
elif [ "${TERM%%-*}" = "screen" ]; then
# GNU screen (screen, screen-256color, screen-256color-bce)
printf "\eP\e]%s\007\e\\" "$1"
else
printf "\e]%s\e\\" "$1"
fi
}
# Completely clear the buffer. With this, everything that is not on screen
# is erased.
if [[ "$INSIDE_EMACS" = 'vterm' ]]; then
function clear(){
vterm_printf "51;Evterm-clear-scrollback";
tput clear;
}
fi
# With vterm_cmd you can execute Emacs commands directly from the shell.
# For example, vterm_cmd message "HI" will print "HI".
# To enable new commands, you have to customize Emacs's variable
# vterm-eval-cmds.
vterm_cmd() {
local vterm_elisp
vterm_elisp=""
while [ $# -gt 0 ]; do
vterm_elisp="$vterm_elisp""$(printf '"%s" ' "$(printf "%s" "$1" | sed -e 's|\\|\\\\|g' -e 's|"|\\"|g')")"
shift
done
vterm_printf "51;E$vterm_elisp"
}
# This is to change the title of the buffer based on information provided by the
# shell. See, http://tldp.org/HOWTO/Xterm-Title-4.html, for the meaning of the
# various symbols.
PROMPT_COMMAND="${PROMPT_COMMAND:+$PROMPT_COMMAND; }"'echo -ne "\033]0;${HOSTNAME}:${PWD}\007"'
# Sync directory and host in the shell with Emacs's current directory.
# You may need to manually specify the hostname instead of $(hostname) in case
# $(hostname) does not return the correct string to connect to the server.
#
# The escape sequence "51;A" has also the role of identifying the end of the
# prompt
vterm_prompt_end(){
vterm_printf "51;A$(whoami)@$(hostname):$(pwd)"
}
PS1=$PS1'\[$(vterm_prompt_end)\]'
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