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#!/bin/bash
if [[ $TERM == eterm* ]]; then
SELECTED_EDITOR='emacsclient'
EDITOR=$SELECTED_EDITOR
VISUAL=$SELECTED_EDITOR
export SELECTED_EDITOR EDITOR VISUAL
## Primatives for interacting with Emacs ###############################
# _emacs_run LISP
_emacs_run() {
emacsclient -a false -e "$*" 2>/dev/null
}
# _emacs_quote UNQUOTED_STRING
_emacs_quote() {
local str="$*"
str="${str//\\/\\\\}" # \ -> \\
str="${str//\"/\\\"}" # " -> \"
str="\"${str}\"" # wrap it in quotes
printf '%s' "$str"
}
# _emacs_unquote QUOTED_STRING
_emacs_unquote() {
local str="$*"
if [[ $str =~ ^\"(.*)\"$ ]]; then
str=${BASH_REMATCH[1]} # un-quote it
str="${str//\\\\/\\}" # \\ -> \
str="${str//\\\"/\"}" # \" -> "
fi
printf '%s' "$str"
}
## Deal with renaming the terminal #####################################
# _emacs_rename_terminal NEW_BUFFER_NAME
# This function uses the variable _EMACS_BUFFER to store some state
_emacs_rename_terminal() {
local name=$(_emacs_quote "$*")
if [[ -n $_EMACS_BUFFER ]]; then
local buffer="(get-buffer $_EMACS_BUFFER)"
else
local buffer='(window-buffer (selected-window))'
fi
_EMACS_BUFFER=$(_emacs_run "(with-current-buffer ${buffer} (rename-buffer ${name} t))")
}
# _emacs_get_short_cwd
_emacs_get_short_cwd() {
local base=$PWD
local suffix=''
# The regex here is a list of directory names
# that aren't really helpful, and that the
# parent directory should be included also.
if [[ $base =~ (/(src|pkg|doc|pkg-libre|src-libre|trunk|tags|branches))*$ ]]; then
suffix=$BASH_REMATCH
base=${base%$suffix}
fi
base=${base##*/}
echo ${base}${suffix}
}
# _emacs_get_desired_buffer_name
_emacs_get_desired_buffer_name() {
echo "*ansi-term*<$(_emacs_get_short_cwd)>"
}
## High-level tasks ####################################################
# Like uniquify on the buffer name (shell -> emacs)
_emacs_set_buffer_name() {
# This doesn't work correctly on remote hosts.
# The "correct" solution is probably to hook into
# default-directory being set in term.el
_emacs_rename_terminal "$(_emacs_get_desired_buffer_name)"
}
# Set the TRAMP directory for remote hosts (shell -> emacs)
_emacs_set_remote_dir() {
if [[ -n $SSH_CONNECTION ]]; then
printf '\eAnSiT%s %s\n' \
u "$USER" \
c "$PWD" \
h "$HOSTNAME"
fi
}
# Set the shell's X11 display (emacs -> shell)
_emacs_set_shell_DISPLAY() {
export DISPLAY=$(_emacs_unquote "$(_emacs_run "(cdr (assoc 'display (frame-parameters)))")")
}
## Do those things #####################################################
_emacs_PROMPT_COMMAND() {
_emacs_set_buffer_name
_emacs_set_remote_dir
_emacs_set_shell_DISPLAY
}
if _emacs_run '()' >/dev/null; then
PROMPT_COMMAND=_emacs_PROMPT_COMMAND
fi
fi
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