Git command line branch warning

bash-git-warning.sh

# Add this to your .bash_profile
# Use this to highlight the current git branch name in your bash prompt - very useful for warning you about git branches that you should not be editing locally
# to add a warning for a branch, do `git config --local --add branch.BRANCHNAME.editwarning true` and unset with `git config --local --unset branch.BRANCHNAME.editwarning
# Colors can be found at https://wiki.archlinux.org/index.php/Color_Bash_Prompt
# thanks to @shreyansb - https://github.com/shreyansb/dotfiles/blob/master/bash/bash_profile for the idea
# and https://gist.github.com/31967 for PROMPT_COMMAND

#PROMPT_COMMAND tells bash to call format_PS1 every time prompt is requested,
#which will set PS1
PROMPT_COMMAND=format_PS1

function format_PS1() {
    git_branch="$(__git_ps1 "%s")" 
    output="${git_branch}" #output will be changed but you want to save git_branch for later

    if [[ -z $git_branch ]]; then
        output=""
    #bplock the dotfiles repo from showing the branch
    elif [[ $git_branch == "master-dotfiles" ]]; then
        output=""
    else
        status="$(git status 2>/dev/null)"
        
        # to add a warning for a branch, do `git config --local --add branch.BRANCHNAME.editwarning true` and unset with `git config --local --unset branch.BRANCHNAME.editwarning
        branch_warning="branch.${git_branch}.editwarning=true"
        hide="$(git config -l)"
        
        if [[ $hide =~ $branch_warning ]]; then
            output="\[${bakred}\] -- ${output} -- \[${txtend}\]"
        else
            output="(${output})"
        fi
        
        if [[ $status =~ "Untracked files" ]]; then
            output="\[${txtylw}\]${output}\[${txtend}\]"
        elif [[ $status =~ "Changes not staged for commit" ]]; then
            output="\[${txtylw}\]${output}\[${txtend}\]"
   
  export PS1="\[${undgrn}\]\w\[\e[m\]$output \$ "
}

# You'll probably also want to install bash-completion with homebrew: 
if which brew > /dev/null; then
  export PATH=/usr/local/bin:$PATH

	# running `brew --prefix` twice can actually take considerable time
	# every time you open a new shell.  I recommend replacing both calls
	# with /usr/local (or wherever you changed your brew prefix to)
	# to make it faster
	if [ -f `brew --prefix`/etc/bash_completion ]; then
		. `brew --prefix`/etc/bash_completion
	fi
fi