Enable Git Completion and Show Git Branch Name in Bash on Mac

install bash-completion

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brew install git bash-completion

add bash-completion to your .bash_profile

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if [ -f `brew --prefix`/etc/bash_completion ]; then
    . `brew --prefix`/etc/bash_completion
fi

show branch name 

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

References

  1. https://github.com/bobthecow/git-flow-completion/wiki/Install-Bash-git-completion
  2. http://martinfitzpatrick.name/article/add-git-branch-name-to-terminal-prompt-mac