dotfiles/home/.config/shell/prompt

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2022-10-29 18:25:42 +00:00
#!/usr/bin/env zsh
# shellcheck disable=SC2155
# Configuration variables:
# Once we are too deep in the filestructure, we can usually afford to shorten
# the whole working directory and only print something like ~/.../dir3/dir4/dir5
# instead of ~/dir1/dir2/dir3/dir4/dir5. If this isn't desired, set this to 0
USE_SHORTENED_WORKDIR=1
# Show how much time it took to run a command
CMD_TIME_SHOW=1
# Minimum units to show the time precision, if
# we use "s" (seconds), and the output took 0s,
# we don't print the output at all to avoid clutter.
# Same goes for any other units, however with "ms"
# (miliseconds), this is very unlikely
# Valid options: ms/s/m/h/d
CMD_TIME_PRECISION="s"
# Minimum time in miliseconds, to print the time took,
# if the command takes less than this amount of miliseconds,
# don't bother printing the time took, this is nice if you
# don't need to see how long commands like 'echo' took
# Setting this to 0 will always print the time taken
CMD_TIME_MINIMUM=100
# hide EOL sign ('%')
export PROMPT_EOL_MARK=""
# TTY (pure linux) terminal only has 8-bit color support
# (unless you change it in kernel), respect this and downgrade
# the color scheme accordingly (it won't look best, but it's
# still better than no colors)
if [ "$TERM" = "linux" ]; then
GREEN="%F{002}"
RED="%F{001}"
ORANGE="%F{003}"
BLUE="%F{004}"
LBLUE="%F{006}"
PURPLE="%F{005}"
else
GREEN="%F{047}"
RED="%F{196}"
ORANGE="%F{214}"
BLUE="%F{027}"
LBLUE="%F{075}"
PURPLE="%F{105}"
fi
RESET="%f"
# Signals git status of CWD repository (if any)
git_prompt() {
ref=$(command git symbolic-ref HEAD 2> /dev/null) || ref=$(command git rev-parse --short HEAD 2> /dev/null) || return 0
echo -n " $ORANGE${ref#refs/heads/}"
if [ -n "$(git status --short 2>/dev/null)" ]; then
echo "$RED+"
fi
}
# Adds @chroot or @ssh
foreign_prompt() {
if [ "$(awk '$5=="/" {print $1}' </proc/1/mountinfo)" != "$(awk '$5=="/" {print $1}' </proc/$$/mountinfo)" ]; then
echo -n "@${ORANGE}chroot"
elif [ -n "$SSH_CLIENT" ] || [ -n "$SSH_TTY" ]; then
echo -n "@${ORANGE}ssh"
fi
}
#nd Prints appropriate working directory
working_directory() {
# By default up to 5 directories will be tolerated before shortening
# After we surpass that, first directory (or ~) will be printed together with last 3
# This feature uses special symbol '…', but this isn't aviable when in TTY. Because
# of this, when we are in TTY, we fall back to longer '...'
if [ $USE_SHORTENED_WORKDIR != 1 ]; then
echo -n " $BLUE$~"
elif [ "$TERM" = "linux" ]; then
echo -n " $BLUE%(5~|%-1~/.../%3~|%4~)"
else
echo -n " $BLUE%(5~|%-1~/…/%3~|%4~)"
fi
}
# Execution time tracking hooks, this is unique to zsh, as it can add
# preexec and precmd hooks. We can utilize this to keep track of the
# amount of time it took to run certain command. We store the start time
# within a variable: PROMPT_EXEC_TIME_START, which we then compare and
# unset after the command was finished. In here, we simply set the
# PROMPT_EXEC_TIME_DURATION, which is then used in the actual prompt
# This will only be enabled if SHOW_CMD_TIME is 1.
exec_time_preexec_hook() {
[[ $SHOW_CMD_TIME == 0 ]] && return
PROMPT_EXEC_TIME_START=$(date +%s.%N)
}
exec_time_precmd_hook() {
[[ $SHOW_CMD_TIME == 0 ]] && return
[[ -z $PROMPT_EXEC_TIME_START ]] && return
local PROMPT_EXEC_TIME_STOP="$(date +%s.%N)"
PROMPT_EXEC_TIME_DURATION=$(echo "($PROMPT_EXEC_TIME_STOP - $PROMPT_EXEC_TIME_START) * 1000" | bc -l)
unset PROMPT_EXEC_TIME_START
}
format_time() {
# Do some formatting to get nice time (e.g. 2m 12s) from miliseconds
# $1 is the milisecond amount (int or float)
# $2 is the precision (ms/s/m/h/d)
local T="$1"
local D="$(echo "scale=0;$T/1000/60/60/24" | bc -l)"
local H="$(echo "scale=0;$T/1000/60/60%24" | bc -l)"
local M="$(echo "scale=0;$T/1000/60%60" | bc -l)"
local S="$(echo "scale=0;$T/1000%60" | bc -l)"
local MS="$(echo "scale=0;$T%1000" | bc -l)"
local precision=$2
local out=""
case "$precision" in
"ms") [[ "$MS" -gt 0 ]] && out="$(printf "%dms" "$MS") ${out}"; precision="s" ;&
"s") [[ "$S" -gt 0 ]] && out="$(printf "%ds" "$S") ${out}"; precision="m" ;&
"m") [[ "$M" -gt 0 ]] && out="$(printf "%dm" "$M") ${out}"; precision="h" ;&
"h") [[ "$H" -gt 0 ]] && out="$(printf "%dh" "$H") ${out}"; precision="d" ;&
"d") [[ "$D" -gt 0 ]] && out="$(printf "%dd" "$D") ${out}" ;;
*) out="$T" ;; # Return $1 ($T) if precision wasn't specified/valid
esac
printf "%s" "$out"
}
display_cmd_time() {
[[ $CMD_TIME_SHOW == 0 ]] && return
[[ -z $PROMPT_EXEC_TIME_DURATION ]] && return
# If the time duration is less than minimum time,
# don't print the time taken
[[ $PROMPT_EXEC_TIME_DURATION -lt $CMD_TIME_MINIMUM ]] && return
local time_took="$(format_time "$PROMPT_EXEC_TIME_DURATION" "$CMD_TIME_PRECISION")"
# Don't display if the time didn't give us output
# this happens when all fields (seconds/minutes/...) are 0,
# if we use milisecond precision, this will likely never happen
# but with other precisions, it could
[ ${#time_took} -eq 0 ] && return
echo -n " ${LBLUE}took ${time_took}"
}
setopt promptsubst # enable command substitution in prompt
# Setup ZSH hooks to display the running time of commands
autoload -Uz add-zsh-hook
add-zsh-hook preexec exec_time_preexec_hook
add-zsh-hook precmd exec_time_precmd_hook
# Primary Prompt
[ "$EUID" -eq 0 ] && PS1="$RED%n$RESET" || PS1="$GREEN%n$RESET" # user
PS1+="$(foreign_prompt)"
PS1+="$(working_directory)"
PS1+="\$(git_prompt)"
PS1+="\$(display_cmd_time)"
PS1+=" $PURPLE%(!.#.$)$RESET " # Final symbol (# or $)
# Next line prompt
PS2="$RED\ $RESET"
# Right side prompt
RPS1=""
if [ "$TERM" = "linux" ]; then
# Displaying cmd time here works, but often causes issues when we
# resize the terminal, since right prompts can be annoying to deal
# with when resizing. This would run relatively often so it makes
# more sense to only use it in PS1 (left prompt), but if desired,
# this can be uncommented
#RPS1+="\$(display_cmd_time)"
# If we find a non-zero return code, print it in the right prompt,
# use X here, to avoid issues with TTY not having support for
# a nicer unicode character that we use otherwise ("↵")
RPS1+="%(?..${RED}%? X$RESET)"
else
# Read comments for the section above.
#RPS1+="\$(display_cmd_time)"
# NOTE: "↵" symbol could cause issues with on some terminals/machines that
# don't handle unicode well, this issue could be very confusing to debug,
# and it would not be apparent what's wrong since the symbol itself will
# be drawn, however when it is drawn, it will also move the cursor line
# 2 places back since this symbol is made up of 3 bytes (in unicode) and
# regular ASCII characters only take up 1 byte, this means that whenever
# the right-side prompt appears (on error), the prompt would have this issue.
RPS1="%(?..${RED}%? ↵$RESET)"
fi