zsh prompt

.zshrc

# dbbolton's zshrc

## snip all lines not directly related to the prompt

# host symbols
# if [ $TERM == 'rxvt-unicode' ]; then
if [ $HOST == 'ganymed' ]; then
    HOST_SYM='♃ '
elif [ $HOST == 'reddevil' ]; then
    HOST_SYM='♆ '
elif [ $HOST == 'barrett' ]; then
    HOST_SYM='☉'
else
    HOST_SYM='%%'
fi



function precmd {

    local TERMWIDTH
    (( TERMWIDTH = ${COLUMNS} - 1 ))

    PR_FILLBAR=""
    PR_PWDLEN=""

    local promptsize=${#${(%):---(%n@%m:%l)---()--}}
    local pwdsize=${#${(%):-%~}}
    local filesize=${#${(%):-$FILECOUNT}}

    if [[ "$promptsize + $pwdsize" -gt $TERMWIDTH ]]; then
        ((PR_PWDLEN=$TERMWIDTH - $promptsize))
    else
    PR_FILLBAR="\${(l.(($TERMWIDTH - ($promptsize + $pwdsize + $filesize + 5)))..${PR_HBAR}.)}"
    fi

## git stuff ##
    GIT_STAT=''
    GIT_BRANCH=''
if [[ -d .git ]]; then
    if [[ -z $( git status | grep "nothing to commit" ) ]]; then
        GIT_STAT='+'
    fi


    if [[ -d .git ]]; then
        GIT_BRANCH=`git branch | perl -ne 'print if s{\*\s*}{}'`
    fi

    GIT_PROMPT="${GIT_STAT} ${GIT_BRANCH}"
fi

## dir name
    count=$( print $PWD | wc -c )

    if [[ $count -lt 30 ]]; then
        PR_DIR='%~'
        PR_RDIR=''
    else
        PR_DIR='…/%c'
    fi
}

setcolors () {
    autoload colors zsh/terminfo
    if [[ "$terminfo[colors]" -ge 8 ]]; then
    colors
    fi
    for color in RED GREEN YELLOW BLUE MAGENTA CYAN WHITE BLACK; do
    eval PR_$color='%{$terminfo[bold]$fg[${(L)color}]%}'
    eval PR_LIGHT_$color='%{$fg[${(L)color}]%}'
    (( count = $count + 1 ))
    done
    PR_NO_COLOR="%{$terminfo[sgr0]%}"
}

setcolors

setprompt () {
    # box-drawing characters
    typeset -A altchar
    set -A altchar ${(s..)terminfo[acsc]}
    PR_SET_CHARSET="%{$terminfo[enacs]%}"
    PR_SHIFT_IN="%{$terminfo[smacs]%}"
    PR_SHIFT_OUT="%{$terminfo[rmacs]%}"
    PR_HBAR=${altchar[q]:--}
    PR_ULCORNER=${altchar[l]:--}
    PR_LLCORNER=${altchar[m]:--}
    PR_LRCORNER=${altchar[j]:--}
    PR_URCORNER=${altchar[k]:--}

    setopt prompt_subst

    case $TERM in
    xterm*)
        PR_TITLEBAR=$'%{\e]0;%(!.-=*[ROOT]*=- | .)%n@%m:%~ | ${COLUMNS}x${LINES} | %y\a%}'
        ;;
    screen)
        PR_TITLEBAR=$'%{\e_screen \005 (\005t) | %(!.-=[ROOT]=- | .)%n@%m:%~ | ${COLUMNS}x${LINES} | %y\e\\%}'
        ;;
    rxvt-unicode*)
        PR_TITLEBAR=$'%{\e]0;%(!.-=*[ROOT]*=- | .)%n@%m:%~ | ${COLUMNS}x${LINES} | %y\a%}'
        ;;
    *)
        PR_TITLEBAR=$'%n@%m:%~'
        ;;
    esac

    if [[ "$TERM" == "screen" ]]; then
    PR_STITLE=$'%{\ekzsh\e\\%}'
    else
    PR_STITLE=''
    fi

# Some interesting prompt chars
# ≻ ≽ ≿ ⊃ ⊇ ⋟ ⌘ ▶ ▷ ▸ ▹ ► ▻ ⚡ ❩ ❫ ❭ ❯ ❱ ➔ ➙ ➛ ➜ ➝ ➞ ➟
# ➠ ➡ ➢ ➣ ➤ ➥ ➳ ➵ ➸ ➺ ➻ ➼ ⇋ ⇌ ∫ ∬ ∭ ∴ ∵ ≍

PROMPT_CHAR='≻≻'

if [ $TERM == 'linux' ] ; then
    PROMPT='$PR_BLUE%n$PR_WHITE@$PR_RED%m$PR_WHITE:$PR_YELLOW%c$PR_WHITE%%$PR_NO_COLOR '
    RPROMPT='tty%l,%?? ${PR_RED}%D{%l:%M:%S %p}${PR_NO_COLOR}'

else
     PROMPT='
${PR_BLUE}${HOST_SYM} ${PR_MAGENTA}${PR_DIR} ${PR_RED}${PROMPT_CHAR}${PR_NO_COLOR} '
        RPROMPT='${PR_YELLOW}${GIT_PROMPT}${PR_NO_COLOR} '

}

setprompt