bashrc feature to avoid wrong edits

.bash4git.sh

# Usage: source it from ~/.bashrc before unsetting color_prompt
# it will notify you when you're about to crack a git repo at wrong branch...

_is_git() {
	local wd=`pwd`
	while [ -n "$wd" -a "$wd" != '/' ]; do
		[ -d "$wd/.git/." ] && { echo "$wd"; return 0; }
		wd="$(dirname "$wd")"
	done
	return 1
}

_git_warn() {
	local color=no; [ "$1" = color ] && color=yes
	local git=''
	if git=$(_is_git); then
		local branch=$(git branch --list --no-color | awk '$1=="*"{print $2;exit}')
		[ -z "$branch" ] && { echo '[!]'; return; }
		local status=$(git status --porcelain | wc -l)
		if echo "$branch" | grep -q \\.; then
			local -i n=$(echo "$branch" | tr '.' '\n' | wc -l)
			branch="…$(echo -n "$branch" | cut -d. -f$n)"
		fi
		case "$branch" in
		test|prod)
			if [ "$color" = yes ]; then
		       		branch=$'\033''[0;1;31m'"$branch"$'\033''[00m'$'\033''[01;34m'
			else
				branch="!!${branch}!!"
			fi;;
		esac
		[ "$status" = 0 ] || branch+=":${status}"
		echo "[$branch]"
	fi
}

if [ "$color_prompt" = yes ]; then
	PS1="${PS1/'\w'/'\[\033[01;34m\]\w$(_git_warn color)\[\033[00m\]'}"
else
	PS1="${PS1/'\w'/'\w$(_git_warn)'}"
fi

# EOF #