OS X .bash_profile

.bash_profile

if [ -x /usr/bin/tput ] && tput setaf 1 >& /dev/null; then
    c_git_clean=$(tput setaf 2)
    c_git_dirty=$(tput setaf 1)
    c_git_semi_dirty=$(tput setaf 3)
    c_reset=$(tput sgr0)
else
    c_git_clean=
    c_git_dirty=
    c_reset=
    c_git_semi_dirty=
fi

git_prompt ()
{
    if ! git rev-parse --git-dir > /dev/null 2>&1; then
        return 0
    fi

    git_branch=$(git branch 2> /dev/null | sed -n '/^\*/s/^\* //p')
    if git diff HEAD --quiet 2> /dev/null >&2; then
        git_color="${c_git_clean}"
        dirty=0
    else
        git_color="${c_git_dirty}"
        dirty=1
    fi

    if git diff $git_branch origin/$git_branch --quiet 2> /dev/null >&2; then
        git_color="$git_color"
    else
        if [ dirty=0 ]; then
            git_color="${c_git_semi_dirty}"
        fi
    fi

    echo " $git_color[$git_branch]${c_reset}"

}

export PS1="\[\033[36m\]\u\[\033[m\]@\[\033[32m\]\h:\[\033[33;1m\]\w\[\033[m\]\$(git_prompt) \$ "
export CLICOLOR=1
export LSCOLORS=ExFxBxDxCxegedabagacad
alias ls='ls -GFh'
alias tree='tree -CF'

# Append to the Bash history file, rather than overwriting it
shopt -s histappend;

# Autocorrect typos in path names when using `cd`
shopt -s cdspell;

# Enable some Bash 4 features when possible:
# * `autocd`, e.g. `**/qux` will enter `./foo/bar/baz/qux`
# * Recursive globbing, e.g. `echo **/*.txt`
for option in autocd globstar; do
  shopt -s "$option" 2> /dev/null;
done;

# `tre` is a shorthand for `tree` with hidden files and color enabled, ignoring
# the `.git` directory, listing directories first. The output gets piped into
# `less` with options to preserve color and line numbers, unless the output is
# small enough for one screen.
function tre() {
  tree -aC -I '.git|node_modules|bower_components' --dirsfirst "$@" | less -FRNX;
}