Powerline 的なやつ（Powerline 重いっす）

.zshrc

function weakline_precmd() {
  last_code=$?
  export PROMPT="$(/srv/sh/weakline-zsh/weakline -m left -l $last_code)"
  export RPROMPT="$(/srv/sh/weakline-zsh/weakline -m right -l $last_code)"
}
precmd_functions+=(weakline_precmd)

weakline

#!/bin/sh

SEGMENTS_LEFT=(last hostname_if_ssh username readonlydir pwd prompt)
SEGMENTS_RIGHT=(jobs)
PROMPT_END=""
SEPARATOR_LEFT=""
SEPARATOR_RIGHT=""
READONLY_MARK=""

# SEGMENTS {{{
hostname_if_ssh() {
  if [ $SSH_TTY ]; then
    setfgcolor 254
    setbgcolor 166
    echo -n " %m "
  fi
}

username() {
  setfgcolor 250
  if [ $USER = "root" ]; then
    setbgcolor 124
  else
    setbgcolor 240
  fi
  echo -n " %n "
}

pwd() {
  name="$PWD"
  [[ "$name" =~ ^"$HOME"(/|$) ]] && name="~${name#$HOME}" || name="${name#/}"
  setfgcolor 250
  setbgcolor 237
  echo -n " ${name//\// $(setfgcolor 244)$SEPARATOR$(setfgcolor 250) } "
}

jobs() {
  ppid=$(ps -p$$ -oppid=)
  c=0
  for q in `ps -aoppid=`; do
    if [ $q = $ppid ]; then
      let c=$c+1
    fi
  done
  if [ $c -gt 1 ]; then
    setfgcolor 39
    setbgcolor 238
    echo -n " $(expr $c - 1) "
  fi
}

last() {
  if [ $LASTCODE -ne 0 ]; then
    setfgcolor 15
    setbgcolor 161
    echo -n " $LASTCODE "
  fi
}

prompt() {
  resetcolor
  setfgcolor 237
  echo -n $PROMPT_END
}

readonlydir() {
  if [ ! -w "$PWD" ]; then
    setfgcolor 254
    setbgcolor 124
    echo -n " $READONLY_MARK "
  fi
}
# }}}

setfgcolor() {
  echo -ne "%{\x1B[38;5;$1m%}"
}

setbgcolor() {
  echo -ne "%{\x1B[48;5;$1m%}"
}

resetcolor() {
  echo -ne "%{\x1B[0m%}"
}

while getopts m:l: OPT; do
  case $OPT in
    m) MODE=$OPTARG ;;
    l) LASTCODE=$OPTARG ;;
  esac
done

case $MODE in
  left)
    SEPARATOR=$SEPARATOR_LEFT
    for seg in ${SEGMENTS_LEFT[@]}; do $seg; done
    resetcolor
    ;;
  right)
    SEPARATOR=$SEPARATOR_RIGHT
    for seg in ${SEGMENTS_RIGHT[@]}; do $seg; done
    resetcolor
    ;;
esac