My .bashrc config

# general:
export PATH="~/scripts:$PATH"

alias ls="ls -F --color"
alias grep="grep --color=auto"

# git aliases
function gitdiff() {    git diff --no-ext-diff -w "$@" | vim -R -
}

function gitlog() {
    git log --name-only "$@"
}

function gitcommit() {
    git --no-pager diff --no-ext-diff
    echo
    read -p "Are you sure you want to commit these changes? " yn
    case $yn in
        [Yy]* ) git commit "$@"; break;;
    esac
}

# git prompt
host_colour="01;34"
export PS1="\[\033[${host_colour}m\]\h\[\033[00m\]/\u \t \w \$ "

function __git_commits_behind {
    if [ -d .git ]
    then
        git st | perl -ne'm{Your branch is behind.+by (\d+) commit} && print "behind $1< "'
    fi
}

function __git_commits_ahead {
    if [ -d .git ]
    then
        git st | perl -ne'm{Your branch is ahead of.+ by (\d+) commit} && print "ahead $1> "'
    fi
}

function update_prompt {
    local branch=$(git branch --no-color 2>/dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1) /')
    export PS1="\[\033[${host_colour}m\]\h\[\033[00m\]/\u \[\033[${branch_colour}m\]${branch}$(__git_commits_behind)$(__git_commits_ahead)\[\033[00m\]\t \w \$ "
}
export PROMPT_COMMAND=update_prompt