zshの右プロンプトにgitブランチと時刻表示するやつ

gistfile1.sh

#------------------------------------------------------------------------------#
# Utility Functions
#------------------------------------------------------------------------------#

# For PROMPT.
color_prompt()
{
    typeset -A colors
    colors=(  'K' 'black'  'R'     'red'  'G' 'green'  'Y' 'yellow'  \
              'B'  'blue'  'M' 'magenta'  'C'  'cyan'  'W'  'white'  )
    color=$colors[$1]
    msg="$2"
    echo -n "%F{${color}}${msg}%f"
}


# For usual echo.
color_text()
{
    typeset -A esc_codes
    esc_codes=(  'K' 30  'R' 31  'G' 32  'Y' 33  \
                 'B' 34  'M' 35  'C' 36  'W' 37  )
    esc=$esc_codes[$1]
    msg="$2"
    echo -n "[${esc}m${msg}"
}


# Enumerates ancestor directories including the working directory.
ancestor_directories()
{
    curdir="${1:-${PWD}}"
    while true
    do
        echo "${curdir}"
        curdir=$( dirname "${curdir}" )
        [[ "${curdir}" == / ]] && break
    done
}


# Returns the current branch name of the local git repository.
git_current_branch()
{
    git branch | while read row
                 do
                     if [[ -z "${row:#\* *}" ]]
                     then
                         echo -n "${row#\* }"
                         break
                     fi
                 done
}


#------------------------------------------------------------------------------#
# Hooks
#------------------------------------------------------------------------------#

_sinfu_update_prompt()
{
    info=''

    embed_git_branch()
    {
        current_branch=$( git_current_branch 2> /dev/null ) || return
        info+=$( color_prompt G "*${current_branch} " )
    }

    ancestor_directories "${PWD}" \
        | while read dir
          do
              if [[ -d "${dir}/.git" ]]
              then
                  embed_git_branch
                  break
              fi
          done

    RPROMPT="${info}[%T]";
}

precmd_functions=( _sinfu_update_prompt )