bash promptery for git + custom colored dirty flags

git_prompt.sh

# assuming you have the +bash_completion variant of git installed (macports)
# and are including bash completion's setup:
if [ -f /opt/local/etc/bash_completion ]; then
  . /opt/local/etc/bash_completion
fi

TEXT_BLACK='\[\e[0;30m\]' # Black - Regular
TEXT_RED='\[\e[0;31m\]' # Red
TEXT_GREEN='\[\e[0;32m\]' # Green
TEXT_YELLOW='\[\e[0;33m\]' # Yellow
TEXT_BLUE='\[\e[0;34m\]' # Blue
TEXT_PURPLE='\[\e[0;35m\]' # Purple
TEXT_CYAN='\[\e[0;36m\]' # Cyan
TEXT_WHITE='\[\e[0;37m\]' # White
TEXT_RESET='\[\e[0m\]'    # Text Reset

# default:
# PS1="\h:\W \u\$ "

previous_exit_status() {
  if [ $1 -eq 0 ]; then
    # HEAVY ROUND-TIPPED RIGHTWARDS ARROW
    echo -n "➜"
  else
    # HEAVY BALLOT X
    echo -n "${TEXT_RED}✘${TEXT_RESET}"
  fi
}

# good bits are all via git-completion.bash from git.
# using custom function to allow for colors instead of the
#   GIT_PS1_SHOWDIRTYSTATE
#   GIT_PS1_SHOWSTASHSTATE
#   GIT_PS1_SHOWUNTRACKEDFILES
# environment variables.
git_dirty_flag() {
  if [ "true" = "$(git rev-parse --is-inside-work-tree 2>/dev/null)" ]; then
 
    # modifications of tracked files
    # git diff-files --no-ext-diff --ignore-submodules --exit-code --quiet \
    # now, from __git_ps1:
    git diff --no-ext-diff --ignore-submodules --quiet --exit-code \
      || echo -n "${TEXT_YELLOW}*${TEXT_RESET}"
 
    # staged hunks
    if git rev-parse --quiet --verify HEAD >/dev/null; then
git diff-index --no-ext-diff --ignore-submodules --cached --exit-code HEAD --quiet \
        || echo -n "${TEXT_GREEN}+${TEXT_RESET}"
    fi
 
    # untracked files
    if [ -n "$(git ls-files --others --exclude-standard)" ]; then
echo -n "${TEXT_CYAN}?${TEXT_RESET}"
    fi
 
    # stashed changes
    git rev-parse --verify refs/stash >/dev/null 2>&1 && echo -n "${TEXT_PURPLE}\$${TEXT_RESET}"
  fi
}

set_prompt(){
  previous=$?;
  PS1="${TEXT_GREEN}\w${TEXT_RESET}$(__git_ps1)$(git_dirty_flag) $(previous_exit_status $previous) "
}

PROMPT_COMMAND=set_prompt