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