My bash_profile

bash_profile.sh

# .bash_profile
#
# This is a heavyweight bash profile, which makes your workstation more
# usable.

# Lion uses a derpy CC by default.  This will fix that.

export CC=/usr/bin/gcc-4.2

# Pull in the whatever aliases you might have.

if [ -f $HOME/.aliases ] ; then
  source $HOME/.aliases
fi

# Always vim, all the time, for everything.
export EDITOR=vim

# Pull in bash completion stuff so we get git status
# If you use macports, you'll want to sub in their stuff instead.
# If you don't use anything for the git bash stuff, get you something.
# You need it for this bashrc to work right.

if [ -f `brew --prefix`/etc/bash_completion ]; then
  . `brew --prefix`/etc/bash_completion
fi

# Set the title bar to shorthost:curdir so that when you log out of
# a linux host you don't have the title bar still set to that host.
#
# Recipe for DISASTER.

case "$TERM" in
xterm*|rxvt*)
  PROMPT_COMMAND='echo -ne "\033]0;${HOSTNAME%%.*} : ${PWD##*/}\007"'
    ;;
*)
    ;;
esac

# Some things I may want to be private, like amazon creds, but I want this
# profile to be distribuatable, so I put private stuff elsewhere.

if [ -f ~/.bash_private ] ; then
  source ~/.bash_private
fi

# List of handy color escape sequences, properly escaped for Bash so they
# don't fuck up your line wraps.

txtblk='\[\033[0;30m\]' # Black - Regular
txtred='\[\033[0;31m\]' # Red
txtgrn='\[\033[0;32m\]' # Green
txtylw='\[\033[0;33m\]' # Yellow
txtblu='\[\033[0;34m\]' # Blue
txtpur='\[\033[0;35m\]' # Purple
txtcyn='\[\033[0;36m\]' # Cyan
txtwht='\[\033[0;37m\]' # White
bldblk='\[\033[1;30m\]' # Black - Bold
bldred='\[\033[1;31m\]' # Red
bldgrn='\[\033[1;32m\]' # Green
bldylw='\[\033[1;33m\]' # Yellow
bldblu='\[\033[1;34m\]' # Blue
bldpur='\[\033[1;35m\]' # Purple
bldcyn='\[\033[1;36m\]' # Cyan
bldwht='\[\033[1;37m\]' # White
undblk='\[\033[4;30m\]' # Black - Underline
undred='\[\033[4;31m\]' # Red
undgrn='\[\033[4;32m\]' # Green
undylw='\[\033[4;33m\]' # Yellow
undblu='\[\033[4;34m\]' # Blue
undpur='\[\033[4;35m\]' # Purple
undcyn='\[\033[4;36m\]' # Cyan
undwht='\[\033[4;37m\]' # White
bakblk='\[\033[40m\]'   # Black - Background
bakred='\[\033[41m\]'   # Red
badgrn='\[\033[42m\]'   # Green
bakylw='\[\033[43m\]'   # Yellow
bakblu='\[\033[44m\]'   # Blue
bakpur='\[\033[45m\]'   # Purple
bakcyn='\[\033[46m\]'   # Cyan
bakwht='\[\033[47m\]'   # White
txtrst='\[\033[m\]'   # Text Reset

# Set up the prompt

export PS1="$txtgrn\h$bldylw:$txtgrn\w$txtpur\$$txtrst "

# I don't always write utility scripts, but when I do I put them in home/bin
export PATH=$HOME/bin:$PATH

# Everyone should use rvm.
[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm"

# When you merge a branch, you should clean it up on origin
branch-cleanup() {
  git checkout develop
  git branch -D $1
  git push origin :$1
}

# When you make a new branch, you'll probably want to track it remotely too.
branch-new() {
  git checkout -b $1
  git push -u origin $1
}

# These aliases are part of how this bashrc works, so they
# get to live here.  Also, we should definitely not alias cd
# unless we're pretty sure the new one is going to work, so
# I'm gonna at least check to make sure we have bash-completion.

type __gitdir | grep -q function
if [[ $? == 0 ]] ; then
  alias cd='git_aware_change_directory'
  alias whereami='describe_environment'
else
  echo "Your bash_profile wants bash-completion to work right."
fi

# This is a function for changing directories which does some git magic.
git_aware_change_directory() {
  builtin cd $1
  gitdir=$(__gitdir)
  # Always use [[ and never [ because [ has some FUCKED syntax.
  if [[ (${gitdir} == '') && (${GIT_REPO} != '') ]] ; then
    # We're not in a git repo, but we just were, so let's set everything back
    # to normal.
    unset GIT_REPO
    export PS1="$txtgrn\h$bldylw:$txtgrn\w$txtpur\$$txtrst "
  elif [[ ((${gitdir} != '') && (${GIT_REPO} == '')) || ($GIT_REPO != `get_git_repo`) ]] ; then
    # We just changed into a (new) git repo, we should set our variables accordingly
    # and describe our new environment.
    export GIT_REPO=`get_git_repo`
    describe_environment
    GIT_PS1_SHOWDIRTYSTATE=1
    export PS1="$txtgrn\h$bldylw:$txtgrn\w$txtylw\$(__git_ps1 ' [%s]')$txtpur\$$txtrst "
  fi
}

get_git_repo() {
  # This would be a lot easier if __gitdir would just return a full path
  # all the time.
  if [[ $(__gitdir) == ".git" ]] ; then
    REPO=`pwd`
  else
    REPO=$(__gitdir)
    REPO=${REPO%/.git}
  fi
  echo $REPO
}

describe_environment() {
  # Echo wants the same escape sequences, but the bash ones have to be escaped
  # and the echo ones have to not be escaped, so guess I'm including all those twice.
  etxtblk='\033[0;30m' # eblack - Regular
  etxtred='\033[0;31m' # Red
  etxtgrn='\033[0;32m' # Green
  etxtylw='\033[0;33m' # Yellow
  etxtblu='\033[0;34m' # eblue
  etxtpur='\033[0;35m' # Purple
  etxtcyn='\033[0;36m' # Cyan
  etxtwht='\033[0;37m' # White
  ebldblk='\033[1;30m' # Black - Bold
  ebldred='\033[1;31m' # Red
  ebldgrn='\033[1;32m' # Green
  ebldylw='\033[1;33m' # Yellow
  ebldblu='\033[1;34m' # Blue
  ebldpur='\033[1;35m' # Purple
  ebldcyn='\033[1;36m' # Cyan
  ebldwht='\033[1;37m' # White
  eundblk='\033[4;30m' # Black - Underline
  eundred='\033[4;31m' # Red
  eundgrn='\033[4;32m' # Green
  eundylw='\033[4;33m' # Yellow
  eundblu='\033[4;34m' # eblue
  eundpur='\033[4;35m' # Purple
  eundcyn='\033[4;36m' # Cyan
  eundwht='\033[4;37m' # White
  ebakblk='\033[40m'   # Black - Backgroeund
  ebakred='\033[41m'   # Red
  ebadgrn='\033[42m'   # Green
  ebakylw='\033[43m'   # Yellow
  ebakblu='\033[44m'   # Blue
  ebakpur='\033[45m'   # Purple
  ebakcyn='\033[46m'   # Cyan
  ebakwht='\033[47m'   # White
  etxtrst='\033[m'   # Text Reset
  # Now to announce ourselves a new git repo
  echo -e "${etxtylw}---GIT REPO: $GIT_REPO${etxtrst}\n"
  echo -e "${etxtpur}Ruby:${etxtrst} `which ruby`"
  echo -e "${etxtpur}Version:${etxtrst} `ruby -v`"
  # This can be handy, but it can also spew some mess, so I tend to leave it
  # out.  YMMV.
  #echo -e "${etxtpur}Head:${etxtrst} `git show --pretty=oneline HEAD`"
  echo -e "${etxtpur}Remotes:\n${etxtrst}`git remote -v show`"
  if [ -f ${GIT_REPO}/Gemfile ] ; then echo -e "${etxtgrn}Gemfile is present, use bundle exec${etxtrst}" ; fi
  echo -e "\n${etxtylw}------${etxtrst}"
  git status
  echo -e "${etxtylw}------${etxtrst}\n"
}