.bashrc for OS X

.bashrc

#!/bin/sh
# .bashrc

# Source global definitions
if [ -f /etc/bashrc ]; then
  . /etc/bashrc
fi

# Remove duplicates and unwanted commands in the bash history
if [ "$SHLVL" = 1 ]; then
    [ -f $HOME/.bash_history ] && sort $HOME/.bash_history | uniq | grep -vE "^(cat|cd|exit|h|hg|la|less|ls|man|mv|rm|shutdown|vi|which|who) " > /tmp/.bash_history && cp /tmp/.bash_history $HOME/.bash_history
fi

# User specific aliases and functions
if [[ $TERM == xterm* ]]; then
  PS1="[\!]\\$ \[\e]2;\u@\h:\w\a\]"
else
  PS1="\w\n[\!]\\$ "
fi

export PS1
umask 077  #paranoid setting for files

# source the .bash_aliases if it exists
if [ -f "${HOME}/.bash_aliases" ] ; then
  source "${HOME}/.bash_aliases"
fi

mac .bashrc