PROMPT='$(python_version)$(rvm_ruby) %{$fg_bold[green]%}$(current_dir) %{$fg_bold[cyan]%}$(git_time_since_commit)$(git_prompt_info)%{$fg_bold[blue]%}%{$reset_color%}'

ZSH_THEME_GIT_PROMPT_PREFIX="%{$fg_bold[green]%}"
ZSH_THEME_GIT_PROMPT_SUFFIX="%{$reset_color%}"
ZSH_THEME_GIT_PROMPT_DIRTY="%{$fg_bold[cyan]%})%{$reset_color%} %{$fg_bold[yellow]%}⚡%{$reset_color%} "
ZSH_THEME_GIT_PROMPT_CLEAN="%{$fg_bold[cyan]%})%{$reset_color%} "

# Colors vary depending on time lapsed.
ZSH_THEME_GIT_TIME_SINCE_COMMIT_SHORT="%{$fg[green]%}"
ZSH_THEME_GIT_TIME_SHORT_COMMIT_MEDIUM="%{$fg[yellow]%}"
ZSH_THEME_GIT_TIME_SINCE_COMMIT_LONG="%{$fg[red]%}"
ZSH_THEME_GIT_TIME_SINCE_COMMIT_NEUTRAL="%{$fg[cyan]%}"

function current_dir() {
    echo "%~"
}

function python_version() {
    # FIXME python --version # doesn't work since x=`python --version` is not
    # capturing the thing
    if [[ -x "`which python`" && "`ls`" == *.py* ]]; then
        out=`python -c "import sys, itertools; print ''.join([item for item in itertools.takewhile(lambda char: char != ' ', sys.version)])"`
        echo "%{$fg[red]%}‹python-$out›%{$reset_color%}"
    fi
}

function rvm_ruby() {
    cur_dir_files=`ls`
    if [[ -x "`which rvm-prompt`" && ( "$cur_dir_files" == *Capfile* || "$cur_dir_files" == *Gemfile* || "$cur_dir_files" == *Rakefile* || "$cur_dir_files" == *.rb* ) ]]; then
        if [ "$(rvm-prompt i v g)" != "" ]; then
            echo "%{$fg[red]%}‹$(rvm-prompt i v g)›%{$reset_color%}"
        else
            echo ""
        fi
    fi
}

function git_time_since_commit() {
    if git rev-parse --git-dir > /dev/null 2>&1; then
        # Only proceed if there is actually a commit.
        if [[ $(git log 2>&1 > /dev/null | grep -c "^fatal: bad default revision") == 0 ]]; then
            # Get the last commit.
            last_commit=`git log --pretty=format:'%at' -1 2> /dev/null`
            now=`date +%s`
            seconds_since_last_commit=$((now-last_commit))

            # Totals
            MINUTES=$((seconds_since_last_commit / 60))
            HOURS=$((seconds_since_last_commit/3600))

            # Sub-hours and sub-minutes
            DAYS=$((seconds_since_last_commit / 86400))
            SUB_HOURS=$((HOURS % 24))
            SUB_MINUTES=$((MINUTES % 60))

            if [[ -n $(git status -s 2> /dev/null) ]]; then
                if [ "$MINUTES" -gt 30 ]; then
                    COLOR="$ZSH_THEME_GIT_TIME_SINCE_COMMIT_LONG"
                elif [ "$MINUTES" -gt 10 ]; then
                    COLOR="$ZSH_THEME_GIT_TIME_SHORT_COMMIT_MEDIUM"
                else
                    COLOR="$ZSH_THEME_GIT_TIME_SINCE_COMMIT_SHORT"
                fi
            else
                COLOR="$ZSH_THEME_GIT_TIME_SINCE_COMMIT_NEUTRAL"
            fi

            if [ "$HOURS" -gt 24 ]; then
                echo "($COLOR${DAYS}d${SUB_HOURS}h${SUB_MINUTES}m%{$reset_color%}|"
            elif [ "$MINUTES" -gt 60 ]; then
                echo "($COLOR${HOURS}h${SUB_MINUTES}m%{$reset_color%}|"
            else
                echo "($COLOR${MINUTES}m%{$reset_color%}|"
            fi
        else
            COLOR="$ZSH_THEME_GIT_TIME_SINCE_COMMIT_NEUTRAL"
            echo "($COLOR~|"
        fi
    fi
}