Fancy pants PS1

bashrc

# .bashrc

# Source global definitions
if [ -f /etc/bashrc ]; then
	. /etc/bashrc
fi

export EDITOR=vim
export PAGER=less

source /usr/share/git-core/contrib/completion/git-prompt.sh
GIT_PS1_SHOWDIRTYSTATE=1
GIT_PS1_SHOWUNTRACKEDFILES=1
GIT_PS1_BLACKLIST='WebKit llvm gcc gecko-dev servo rust'

# pretty hacky wrapper around __git_ps1 that checks directories in a blacklist 
__git_maybe_ps1()
{
        local fmt=''

        if [ -z "${1-}" ]; then
                fmt='(%s)'
        else
                fmt=${1}
        fi

        local cur_dir=$( pwd )
        local print_ps1='yes'
        for black in ${GIT_PS1_BLACKLIST}; do
                if [[ "${cur_dir}" == *${black}* ]]; then
                        print_ps1='no'
                        break;
                fi
        done

        if [ $print_ps1 == 'yes' ]; then
                echo $(__git_ps1 "$fmt")
        fi
}

__toolbox_maybe_ps1()
{
        if [ -f "/run/.containerenv" ]; then
                echo "📦"
        fi
}

__jhbuild_maybe_ps1()
{
        if [ -n "$UNDER_JHBUILD" ]; then
                echo "👣"
        fi
}

generate_prompt()
{
        local NO_FORMAT="\e[0m"

        ## Effect 
        local NONE='0'
        local BOLD='1'
        local DIM='2'
        local UNDERLINE='4'
        local BLINK='5'
        local INVERT='7'
        local HIDDEN='8'

        ## Foreground color
        local FG_DEFAULT='39'
        local FG_BLACK='30'
        local FG_RED='31'
        local FG_GREEN='32'
        local FG_YELLOW='33'
        local FG_BLUE='34'
        local FG_MAGENTA='35'
        local FG_CYAN='36'
        local FG_LIGHT_GRAY='37'
        local FG_DARK_GRAY='90'
        local FG_LIGHT_RED='91'
        local FG_LIGHT_GREEN='92'
        local FG_LIGHT_YELLOW='93'
        local FG_LIGHT_BLUE='94'
        local FG_LIGHT_MAGENTA='95'
        local FG_LIGHT_CYAN='96'
        local FG_WHITE='97'

        ## Background color
        local BG_DEFAULT='49'
        local BG_BLACK='40'
        local BG_RED='41'
        local BG_GREEN='42'
        local BG_YELLOW='43'
        local BG_BLUE='44'
        local BG_MAGENTA='45'
        local BG_CYAN='46'
        local BG_LIGHT_GRAY='47'
        local BG_DARK_GRAY='100'
        local BG_LIGHT_RED='101'
        local BG_LIGHT_GREEN='102'
        local BG_LIGHT_YELLOW='103'
        local BG_LIGHT_BLUE='104'
        local BG_LIGHT_MAGENTA='105'
        local BG_LIGHT_CYAN='106'
        local BG_WHITE='107'

        # Text
        local TEXT_FORMAT_1="\e[${BOLD};${FG_WHITE};${BG_DARK_GRAY}m"
        local TEXT_FORMAT_2="\e[${BOLD};${FG_WHITE};${BG_LIGHT_BLUE}m"
        local TEXT_FORMAT_3="\e[${DIM};${FG_DARK_GRAY};${BG_WHITE}m"

        # Separator; FG=BG previous section, BG=BG next section
        local SEPARATOR_FORMAT_1="\e[${FG_DARK_GRAY};${BG_LIGHT_BLUE}m"
        local SEPARATOR_FORMAT_2="\e[${FG_LIGHT_BLUE};${BG_WHITE}m"
        local SEPARATOR_FORMAT_3="\e[${NONE};${FG_WHITE};${BG_DEFAULT}m"

        local TRIANGLE=$'\uE0B0' 
        local SEPARATOR_1=$SEPARATOR_FORMAT_1$TRIANGLE
        local SEPARATOR_2=$SEPARATOR_FORMAT_2$TRIANGLE
        local SEPARATOR_3=$SEPARATOR_FORMAT_3$TRIANGLE

        PROMPT_USER=$"$TEXT_FORMAT_1 \u "
        PROMPT_PWD=$"$TEXT_FORMAT_2 \w "
        # Escape the $(), to let bash evaluate the function every time
        PROMPT_EXTRA=$"$TEXT_FORMAT_3 \$(__toolbox_maybe_ps1)\$(__jhbuild_maybe_ps1)\$(__git_maybe_ps1)"
        PROMPT_FORMAT=$"$NO_FORMAT"

        PS1="${PROMPT_USER}${SEPARATOR_1}${PROMPT_PWD}${SEPARATOR_2}${PROMPT_EXTRA}${SEPARATOR_3}${PROMPT_FORMAT}\n"
}

# Old PS1
#PS1='\e[32m\u\e[39m@\e[32m\h\e[39m:\e[4;33m$(__jhbuild_maybe_ps1)\e[0;31m\w \e[1;34m$(__git_maybe_ps1 "(%s)")\e[0;39m\$\e[0m\n'
#PS1='\e[32m\u\e[39m@\e[32m\h\e[39m:\e[31m\w \e[39m\$\e[0m\n'

generate_prompt
unset generate_prompt