MyBash/ps1.rc.sh

# define symbols
declare -A symbols=(
    [hard_separator]="▶"
    [soft_separator]="|"
    [git]=""
    [lock]=""
    [flag]="⚑"
    [plus]="✚"
    [tick]="✔"
    [cross]="✘"
    [enter]="⏎"
    [python]="λ"
    [battery_charging]="⚡"
    [battery_discharging]="▮"
    [untracked]="U"
    [stash]="🐿"
    [ahead]="+"
    [behind]="-"
    [smilie]="☺"
    [frownie]="☹"
)

last_section_bg=

# $1 - Text (FG) color of new section
# $2 - BG of new section
function section_separator() {
    if [ $2 = $last_section_bg ]; then
	PS1="${PS1}$(_CC ${1} ${2})${symbols[soft_separator]}"
    else
	if [ "$2" ]; then
	    PS1="${PS1}$(_CC ${last_section_bg} ${2})${symbols[hard_separator]}"
	else
	    PS1="${PS1}${NORMAL}$(_CFG ${last_section_bg})${symbols[hard_separator]}${NORMAL}"
	fi
    fi
}

# $1 - Content
# $2 - Text (FG) color
# $3 - BG Color
function section(){
    if [ $last_section_bg ]; then
	$(section_separator $2 $3)
    fi
    last_section_bg=$3
    PS1="${PS1}$(_CC ${2} ${3})${1}"
    echo "$(_CC ${2} ${3})${1}"
}


# This function was modified from one found @ https://www.reddit.com/r/linux/comments/2uf5uu/this_is_my_bash_prompt_which_is_your_favorite/?st=jikgswh4&sh=371ba8bf
# $1 - Default text (foreground) color
# $2 - Background color
function section_git_status() {
  local default untracked stash clean ahead behind staged dirty diverged
  default=$(_CC $1 $2)
  untracked=$(_CC $GREEN $2)
  stash=$(_CC $GREEN $2)
  clean=$(_CC $GREEN $2)
  ahead=$(_CC $YELLOW $2)
  behind=$(_CC $YELLOW $2)
  staged=$(_CC $CYAN $2)
  dirty=$(_CC $RED $2)
  diverged=$(_CC $RED $2)


  branch=$(git rev-parse --abbrev-ref HEAD 2>/dev/null)
  if [[ -n "$branch" ]]; then
      $(section_separator $1 $2)
      last_section_bg=$2
      
      PS1="${PS1}${default}${symbols[git]} $branch "
      git_status=$(git status 2> /dev/null)
      # If nothing changes the color, we can spot unhandled cases.
      if [[ $git_status =~ 'Untracked files' ]]; then
	  PS1="${PS1}${untracked}${symbols[untracked]}"
      fi
      if git stash show &>/dev/null; then
	  PS1="${PS1}${stash}${symbols[stash]}"
      fi
      if [[ $git_status =~ 'Your branch is ahead' ]]; then
	  PS1="${PS1}${ahead}${symbols[ahead]}"
      fi
      if [[ $git_status =~ 'Your branch is behind' ]]; then
	  PS1="${PS1}${behind}${symbols[behind]}"
      fi
      if [[ $git_status =~ 'Changes to be committed' ]]; then
	  PS1="${PS1}${staged}${symbols[tick]}"
      fi
      if [[ $git_status =~ 'Changed but not updated' ||
		  $git_status =~ 'Changes not staged'      ||
		  $git_status =~ 'Unmerged paths' ]]; then
	  PS1="${PS1}${dirty}${symbols[cross]}"
      fi
      if [[ $git_status =~ 'Your branch'.+diverged ]]; then
	  PS1="${PS1}${diverged}${symbols[enter]}"
      fi
  fi
}


set_prompt() {
    local lec="$?"
    local color=$GREEN
    local bg=$BG_LBLUE
    local smilie=${symbols[smilie]}
    if [ $COLOR_PROMPT = yes ]; then
	if [ $lec -ne 0 ]; then
	    color=$RED
	    smilie=${symbols[frownie]}
	fi
	PS1="${debian_chroot:+($debian_chroot)}Hi" #$(_CC $GREEN $BG_DGREY)\u $(_CC $LBLUE $BG_DGREY)\w$(_CC $DEFAULT $BG_DGREY)|${smilie}$(_CC $DEFAULT $BG_DGREY)|$(_git_status)${NORMAL}$(_CFG $DGREY)${symbols[hard_separator]}${NORMAL} "
	#$(section $smilie $color $bg)
	$(section "\\\\u" $GREEN $BG_GREY)
	#$(section "\\\\w" $BLUE $BG_GREY)
	#$(section_git_status $YELLOW $BG_LBLUE)
	#$(section_separator)
    else
	PS1="${debian_chroot:+($debian_chroot)}\u@\h:\w\$ "
    fi
}

PROMPT_COMMAND="set_prompt; $PROMPT_COMMAND"