Git branch and dirty state in Bash prompt.

.bash_profile

# http://henrik.nyh.se/2008/12/git-dirty-prompt
# http://www.simplisticcomplexity.com/2008/03/13/show-your-git-branch-name-in-your-prompt/
#   username@Machine ~/dev/dir[master]$   # clean working directory
#   username@Machine ~/dev/dir[master*]$  # dirty working directory

# Edit .bash_profile
$ nano ~/.bash_profile

function parse_git_dirty {
  [[ $(git status 2> /dev/null | tail -n1) != "nothing to commit (working directory clean)" ]] && echo "*"
}
function parse_git_branch {
  git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e "s/* \(.*\)/[\1$(parse_git_dirty)]/"
}
PS1='\[\033[00m\]\u@\h\[\033[0;32m\] \w \[\033[31m\]$(parse_git_branch) \[\033[00m\]$\[\033[00m\] '

# Reload .bash_profile
$ source ~/.bash_profile

# http://jblevins.org/log/git-colors
# Add colour to git
$ nano ~/.gitconfig

[color]
  branch = auto
  diff = auto
  status = auto

[color "branch"]
  current = yellow reverse
  local = yellow
  remote = green

[color "diff"]
  meta = yellow bold
  frag = magenta bold
  old = red bold
  new = green bold

[color "status"]
  added = green
  changed = red
  untracked = cyan