Add colored status to your bash prompt while in a git repo.

gistfile1.sh

# Define a few colors for later use.  The escaped brackets tell bash that they
# are non-printable and keep word-wrapping sane.

TXT_RED='\['`tput setaf 1`'\]'
TXT_GREEN='\['`tput setaf 2`'\]'
TXT_RESET='\['`tput sgr0`'\]'

# Build a prompt decorator if we're in a git repo.  The branch name is included
# in green if the branch is master, red otherwise.  An asterisk appears if the
# working directory is not clean.

function parse_git_branch {
    
    status="$(git status 2> /dev/null)"
    pattern="^# On branch ([^${IFS}]*)"
    git_prompt_decorator=" "
  
    if [[ ${status} =~ ${pattern} ]]; then
        
        branch_name=${BASH_REMATCH[1]}
        dirty=""
        color=${TXT_RED}
        
        if [[ ! ${status} =~ "working directory clean" ]]; then
            dirty="*"
        fi
        
        if [[ ${branch_name} == "master" ]]; then
            color=${TXT_GREEN}
        fi
        
        git_prompt_decorator=" [${color}${branch_name}${TXT_RESET}${dirty}] "
    fi    
}

# Set up a function that is run every time the shell prompt is generated.

function set_shell_prompt {
    parse_git_branch
    PS1="\h:\W"${git_prompt_decorator}"\$ "
}

export PROMPT_COMMAND=set_shell_prompt