Show current git branch in command line

Add the below lines in ~/.bash_profile and run the 'source ~/.bash_profile'.

parse_git_branch() {
     git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/ (\1)/'
}
export PS1="\u@\h \[\033[32m\]\w\[\033[33m\]\$(parse_git_branch)\[\033[00m\] $ "

In here parse_git_branch() function extract the branch name when your are in git repository. 

$ git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/ (\1)/'

 (master)

function output used in PS1 variable in order to prompt the branch name.

In above PS1 we defined following properties

* \u@\h \[\033[32m\] - user, host name and its displaying color

* \w\[\033[33m\] - current working directory and its displaying color

* \$(parse_git_branch)\[\033[00m\] - git branch name and its displaying color