Colored git prompt (current branch, status, and stash count)

.bash_ps1

################################################
# Git prompt
#
# 2013-06-25 amagoon@northps.com: added statuses
#
# save this as ~/.bash_ps1
#
# point to this file in your ~/.bash_profile
# e.g.:
# 
#    # Git prompt
#    if [ -f "$HOME/.bash_ps1" ]; then
#     . "$HOME/.bash_ps1"
#    fi
#
# After (branch name), you'll see one or more of
#   + uncommitted changes
#   * unstaged changes
#   _ untracked files
#   1 number of stashes for this branch
#
################################################

RED="\[\033[0;31m\]"
YELLOW="\[\033[0;33m\]"
GREEN="\[\033[0;32m\]"
BRIGHTGREEN="\[\033[1;32m\]"
BLUE="\[\033[1;34m\]"
MAGENTA="\[\033[0;35m\]"
NO_COLOUR="\[\033[0m\]"
PROMPT_CHAR='$ '

# Change git color if branch is dirty
function parse_git_staged() {
    local git_status="`git status -unormal 2>&1`"
    if [[ "$git_status" =~ Changes\ to\ be\ committed ]] ; then
        echo -n "+"
    fi
}

function parse_git_unstaged() {
    local git_status="`git status -unormal 2>&1`"
    if [[ "$git_status" =~ Changes\ not\ staged\ for\ commit ]] ; then
        echo -n "*"
    fi
}

function parse_git_untracked() {
    local git_status="`git status -unormal 2>&1`"
    if [[ "$git_status" =~ Untracked\ files ]] ; then
        echo -n "_"
    fi
}

# Show the branch name in parens
function parse_git_branch () {
  git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/ (\1)/'
}

# Show count of stashes for this branch
function parse_git_stashes () {
  git stash list 2> /dev/null | grep "n `git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/'`:" | wc -l | sed 's/^ *//' | sed 's/ *$//' | sed 's/^0$//'
}

PS1="$GREEN\u@\h$NO_COLOUR:\w$GREEN\$(parse_git_branch)$BRIGHTGREEN\$(parse_git_staged)$YELLOW\$(parse_git_unstaged)$RED\$(parse_git_untracked)$BLUE\$(parse_git_stashes)$NO_COLOUR ${PROMPT_CHAR} "