Freshen up that prompt!

Emulate a Powerline setup. Includes:
* Change custom foreground colours to background colours
* Add 8 different separators, selected randomly based on terminal ID
* Prettier and more sensible Git repo sigils
* Cleaned and condensed code
This commit is contained in:
John Mertz 2024-08-16 22:26:07 -06:00
parent 25a0523524
commit a8920ad9b7
1 changed files with 119 additions and 127 deletions

View File

@ -1,14 +1,45 @@
# vim: ft=sh
# Explain prompt
ARG=$1
if [[ $ARG == 'h' || $ARG == '-h' || $ARG == 'help' || $ARG == '--help' || $ARG == '?' ]]; then
ARG="-h"
elif [[ $ARG != '' ]]; then
echo "Invalid argument: $ARG"
exit 0
if [[ $1 && $1 != 'h' && $1 != '-h' && $1 != 'help' && $1 != '--help' && $1 != '?' ]]; then
echo "Invalid argument: $1"
exit
fi
# Declare the S name (as used by `setterm`) and B for POSIX background colour
# Reference them later like: ${COLOURS["BLACK","S"]} or ${COLOURS["CYAN","B"]}
declare -A COLOURS='(
[0,S]="default"
[0,B]="\[\e[0m\]"
[1,S]="red"
[1,B]="\[\e[1;30;41m\]"
[2,S]="green"
[2,B]="\[\e[1;30;42m\]"
[3,S]="yellow"
[3,B]="\[\e[1;30;43m\]"
[4,S]="blue"
[4,B]="\[\e[1;30;44m\]"
[5,S]="magenta"
[5,B]="\[\e[1;30;45m\]"
[6,S]="cyan"
[6,B]="\[\e[1;30;46m\]"
[7,S]="white"
[7,B]="\[\e[1;30;47m\]"
)'
# Assign colour to each module
P="7" # prompt default, white
T="3" # time, yellow
E="7" # venv, white
C="0" # chroot, default
U="2" # user
R="1" # root user
H="1" # host (overwritten for distrobox and ssh)
B="4" # distrobox
S="5" # ssh
D="6" # dir
G="7" # git
# If directory was just changed to the root of a git repository, print onefetch
if [ -n "$DIRCHANGED" ]; then
source ${HOME}/.dotfiles/bash/plenv-path.sh
@ -22,166 +53,127 @@ if [ -n "$DIRCHANGED" ]; then
unset DIRCHANGED
fi
# Default colours
# 0 default, 1 red 2 green 3 yellow 4 blue 5 magenta 6 cyan 7 white (grey)
PC="0" # prompt default
TC="3" # time
EC="7" # venv
CC="1" # chroot
UC="2" # user
RC="1" # root user
HC="4" # host
SC="1" # ssh host
DC="6" # dir
GC="5" # git
# Choose a pseudo random separator character
# Declare the SET name (as used by `setterm`) and PS string for colour options
# Reference them later like: ${COLOURS["5","SET"]} or ${COLOURS["2","PS"]}
declare -A COLOURS='(
[0,SET]="default"
[0,PS]="\[\033[0;0m\]"
[1,SET]="red"
[1,PS]="\[\033[0;31m\]"
[2,SET]="green"
[2,PS]="\[\033[0;32m\]"
[3,SET]="yellow"
[3,PS]="\[\033[0;33m\]"
[4,SET]="blue"
[4,PS]="\[\033[0;34m\]"
[5,SET]="magenta"
[5,PS]="\[\033[0;35m\]"
[6,SET]="cyan"
[6,PS]="\[\033[0;36m\]"
[7,SET]="white"
[7,PS]="\[\033[0;37m\]"
)'
# Local connections can just use ALACRITTY_WINDOW_ID
if [[ -n $ALACRITTY_WINDOW_ID ]]; then
# The last 4 bits are always 0, so drop them
SEP=$(($ALACRITTY_WINDOW_ID >> 4))
(( SEP &= 7 ))
# SSH connections can use PID stored in SSH_CONNECTION
else
# Seems to always be even, so drop 1 bit
SEP=$(( $(echo $SSH_CONNECTION | cut -d ' ' -f 2) >> 1 ))
fi
# Just use the new last 4 bits to get a pseudo random number from 0-7
(( SEP &= 7 ))
# Select the separator character (some wide characters look better with a trailing space)
# See https://github.com/ryanoasis/powerline-extra-symbols
case "$SEP" in
0) SEP="" ;;
1) SEP=" " ;;
2) SEP=" " ;;
3) SEP=" " ;;
4) SEP=" " ;;
5) SEP="" ;;
6) SEP=" " ;;
7) SEP="" ;;
esac
# Get current git branch
function parse_git_branch() {
BRANCH=$(git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/')
if [ ! "${BRANCH}" == "" ]
then
STAT=$(parse_git_dirty)
echo "${COLOURS[\"$GC\",\"PS\"]}(${BRANCH}${STAT})${COLOURS[\"0\",\"PS\"]}"
else
echo ""
fi
[ ! "${BRANCH}" == "" ] && echo "\[\e[1;31;4${G}m\]$(parse_git_dirty)${COLOURS["$G","B"]}${BRANCH}" || echo ""
}
# Get git status
function parse_git_dirty {
status=$(git status 2>&1 | tee)
dirty=$(echo -n "${status}" 2> /dev/null | grep "modified:" &> /dev/null; echo "$?")
untracked=$(echo -n "${status}" 2> /dev/null | grep "Untracked files" &> /dev/null; echo "$?")
ahead=$(echo -n "${status}" 2> /dev/null | grep "Your branch is ahead of" &> /dev/null; echo "$?")
newfile=$(echo -n "${status}" 2> /dev/null | grep "new file:" &> /dev/null; echo "$?")
renamed=$(echo -n "${status}" 2> /dev/null | grep "renamed:" &> /dev/null; echo "$?")
deleted=$(echo -n "${status}" 2> /dev/null | grep "deleted:" &> /dev/null; echo "$?")
status=$(git status 2>/dev/null)
modified=$(echo -n "${status}" | grep "modified:" &> /dev/null; echo "$?")
untracked=$(echo -n "${status}" | grep "Untracked files" &> /dev/null; echo "$?")
ahead=$(echo -n "${status}" | grep "Your branch is ahead of" &> /dev/null; echo "$?")
newfile=$(echo -n "${status}" | grep "new file:" &> /dev/null; echo "$?")
renamed=$(echo -n "${status}" | grep "renamed:" &> /dev/null; echo "$?")
deleted=$(echo -n "${status}" | grep "deleted:" &> /dev/null; echo "$?")
bits=''
if [ "${renamed}" == "0" ]; then
bits=">${bits}"
fi
if [ "${ahead}" == "0" ]; then
bits="*${bits}"
fi
if [ "${newfile}" == "0" ]; then
bits="+${bits}"
fi
if [ "${untracked}" == "0" ]; then
bits="?${bits}"
fi
if [ "${deleted}" == "0" ]; then
bits="x${bits}"
fi
if [ "${dirty}" == "0" ]; then
bits="!${bits}"
fi
if [ "${bits}" != "" ]; then
echo " ${bits}"
else
echo ""
fi
[ "${modified}" == "0" ] && bits="${bits}"
[ "${newfile}" == "0" ] && bits="${bits}"
[ "${deleted}" == "0" ] && bits="${bits}"
[ "${renamed}" == "0" ] && bits="${bits}"
[ "${untracked}" == "0" ] && bits="${bits}🯄 "
[ "${ahead}" == "0" ] && bits="${bits}"
[ "${bits}" != "" ] && echo "${bits}" || echo ""
}
# Comment - allow for command history to be copied directly to bash script
PS1="${COLOURS["$PC","PS"]}# "
# Opening # so that PS1 gets interpretted as a comment if pasted into a terminal or script
PS1="${COLOURS["$P","B"]}#"
# Track the last Background colour so that it can be used for the next separator
LASTB=$P
# Sigil to indicate host, distrobox or ssh. Store HC so that host matches connection type
if [ -f "/run/.containerenv" ]; then
# Sigil to indicate host, distrobox or ssh
PS1="${PS1}${COLOURS["0","PS"]}"
H=$B
[[ $1 ]] && setterm --foreground ${COLOURS[$H,"S"]} && echo "distrobox" && setterm --foreground default
PS1="${PS1}\[\e[0;3${LASTB};4${H}m\]"${SEP}"${COLOURS["$H","B"]}📦"
elif [[ -z $SSH_CLIENT ]]; then
PS1="${PS1}${COLOURS["1","PS"]}"
[[ $1 ]] && setterm --foreground ${COLOURS[$H,"S"]} && echo "host session" && setterm --foreground default
PS1="${PS1}\[\e[0;3${LASTB};4${H}m\]"${SEP}"${COLOURS["$H","B"]}🏠"
else
PS1="${PS1}${COLOURS["1","PS"]}🖧 "
H=$S
[[ $1 ]] && setterm --foreground ${COLOURS[$H,"S"]} && echo "ssh connection" && setterm --foreground default
PS1="${PS1}\[\e[0;3${LASTB};4${H}m\]"${SEP}"${COLOURS["$H","B"]}🖧 "
fi
LASTB=$H
# Time
PS1="${PS1}${COLOURS["$TC","PS"]}\\t "
if [[ $ARG == '-h' ]]; then
setterm --foreground ${COLOURS["$TC","SET"]}; echo "time"; setterm --foreground default
fi
[[ $1 ]] && setterm --foreground ${COLOURS["$T","S"]} && echo "time" && setterm --foreground default
PS1="${PS1}\[\e[0;3${LASTB};4${T}m\]"${SEP}
PS1="${PS1}${COLOURS["$T","B"]}\\t"
LASTB=$T
# Python venv
if [ "$VIRTUAL_ENV" ]; then
VENV="${VIRTUAL_ENV##*/}"
VENV=$(echo "$VENV" | sed -r 's/.*/[\0]/')
PS1="${PS1}${COLOURS["$EC","PS"]}${VENV} "
if [[ $ARG == '-h' ]]; then
setterm --foreground ${COLOURS["$EC","SET"]}; echo "venv"; setterm --foreground default
fi
[[ $1 ]] && setterm --foreground ${COLOURS["$E","S"]} && echo "venv" && setterm --foreground default
PS1=${PS1}\[\e[0;3${LASTB};4${E}m\]${SEP}${COLOURS["$E","B"]}${VENV}
LASTB=$E
fi
# Debian Chroot
if [ -z "$debian_chroot" ] && [ -r /etc/debian_chroot ]; then
PS1="${PS1}${COLOURS["$CC","PS"]}<$(cat /etc/debian_chroot)>"
if [[ $ARG == '-h' ]]; then
setterm --foreground ${COLOURS["$CC","SET"]}; echo "debian chroot"; setterm --foreground default
fi
[[ $1 ]] && setterm --foreground ${COLOURS["$C","S"]} && echo "debian chroot" && setterm --foreground default
PS1="${PS1}\[\e[0;3${LASTB};4${C}m\]${SEP}"${COLOURS["$C","B"]}"<$(cat /etc/debian_chroot)>"
LASTB=$C
fi
# User
if [[ $(whoami) == 'root' ]]; then
UC=$RC
fi
PS1="${PS1}${COLOURS["$UC","PS"]}\\u"
if [[ $ARG == '-h' ]]; then
setterm --foreground ${COLOURS["$UC","SET"]}; echo "user"; setterm --foreground default
fi
# @
PS1="${PS1}${COLOURS["$PC","PS"]}@"
[[ $(whoami) == 'root' ]] && U=$R
[[ $1 ]] && setterm --foreground ${COLOURS["$U","S"]} && echo "user" && setterm --foreground default
PS1="${PS1}\[\e[0;3${LASTB};4${U}m\]"${SEP}"${COLOURS["$U","B"]}\\u\[\e[0;30;4${U}m\]@"
LASTB=$U
# Host
if [[ $SSH_TTY != '' ]]; then
HC="${SC}" # Host colour
if [[ $ARG == '-h' ]]; then
setterm --foreground ${COLOURS["$HC","SET"]}; echo "host"; setterm --foreground default
fi
else
if [[ $ARG == '-h' ]]; then
setterm --foreground ${COLOURS["$HC","SET"]}; echo "host (ssh)"; setterm --foreground default
fi
fi
PS1="${PS1}${COLOURS["$HC","PS"]}\\h"
# :
PS1="${PS1}${COLOURS["$PC","PS"]}:"
[[ $1 ]] && setterm --foreground ${COLOURS["$H","S"]} && echo "hostname" $([[ -z $SSH_TTY ]] || echo " (ssh)") && setterm --foreground default
PS1="${PS1}\[\e[0;3${LASTB};4${H}m\]"${SEP}"${COLOURS["$H","B"]}\\h\[\e[0;30;4${H}m\]:"
LASTB=$H
# Dir
PS1="${PS1}${COLOURS["$DC","PS"]}\\w "
if [[ $ARG == '-h' ]]; then
setterm --foreground ${COLOURS["$DC","SET"]}; echo "directory"; setterm --foreground default
fi
[[ $1 ]] && setterm --foreground ${COLOURS["$D","S"]} && echo "directory" && setterm --foreground default
PS1="${PS1}\[\e[0;3${LASTB};4${D}m\]"${SEP}"${COLOURS["$D","B"]}\\w"
LASTB=$D
# Git
GIT=$(parse_git_branch)
if [[ $GIT != '' ]]; then
PS1="${PS1}${COLOURS["$GC","PS"]}${GIT}"
if [[ $ARG == '-h' ]]; then
setterm --foreground ${COLOURS["$GC","SET"]}; echo "git branch status"; setterm --foreground default
fi
[[ $1 ]] && setterm --foreground ${COLOURS["$G","S"]} && echo "git branch status" && setterm --foreground default
PS1="$PS1\[\e[0;3${LASTB};4${G}m\]"${SEP}${GIT}
LASTB=$G
fi
# \n - start input on new line, again to support copy-paste into bash script
PS1="${PS1}${COLOURS["$PC","PS"]}\\n"
PS1="${PS1}\[\e[0;3${LASTB};1m\]"${SEP}"\[\e[0m\]\n"
export PS1