Show active git branch in Bash prompt

get_git_branch.sh

#!/bin/bash

# Put this in $HOME/bin/get_git_branch.sh

if branch=$(git rev-parse --abbrev-ref HEAD 2> /dev/null); then
    if [[ "$branch" == "HEAD" ]]; then
        branch='detached*'
    fi
fi

echo $branch

show-active-git-branch-in-Bash-prompt

# Add this to $HOME/.bashrc

function git_prompt {
    gitBranch=`$HOME/bin/get_git_branch.sh`
    if [ -z $gitBranch ]; then
        PS1='\u@\h:\W\$ '
    else
        PS1='\u@\h:\W (\[\033[0;35m\]$gitBranch\[\033[0m\])\$ '
    fi
}

PROMPT_COMMAND=git_prompt