Git branch and dirty state in Bash prompt.

.bashrc

# 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 green
#   username@Machine ~/dev/dir [master*]$  # dirty working directory red*
#
function git_branch {
  git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/'
}
# http://unix.stackexchange.com/questions/88307/escape-sequences-with-echo-e-in-different-shells
function markup_git_branch {
  if [[ "x$1" = "x" ]]; then
    echo -e "[$1]"
  else
    if [[ $(git status 2> /dev/null | tail -n1) = "nothing to commit, working directory clean" ]]; then
      echo -e '\033[1;32m['"$1"']\033[0;30m'
    else
      echo -e '\033[1;31m['"$1"'*]\033[0;30m'
    fi
  fi
}
export PS1='\u@\h \[\033[0;34m\]\w\[\033[0m\] $(markup_git_branch $(git_branch))$ '

Color coded branch name depending on state. Green or red.

So I took this and improved on it a bit. Check it out here: https://github.com/jcgoble3/gitstuff/blob/master/gitprompt.sh This uses more reliable code that doesn't rely on a specific output that could change in a new version of Git, and is a bit cleaner and easier to read. Feel free to use it or improve on it more.

On my Win7 machine, it leaves my commands and their output as black on black if in a Git repository.

There's should be a slight change to original code here: the \033[0;30m at the end should be \033[0;0m to reset the prompt colour. The former sets it black, the latter resets formatting on the text.

Kudos to @srguiwiz for the original code and also to @jcgoble3 for imrpoving on it further.
I also made few changes to suite my need. I wanted to maintain the system color, show a different color (red) for master branch and white all other branches. If the status is "dirty", the font should become italic and blinking. With this little tweak, I had to folk @jcgoble3 code and can be found here.