bash_profile

#!/usr/bin/env bash
##.bash_profile
##Annoyance fixes and other cool stuff I've picked up over the years.
##(WTFPL) Michael Parks <mparks@tkware.info>

#Grab the appropriate aliases based on our OS
case $OSTYPE in
  *linux-gnu* ) test -f .profile_linux && source .profile_linux;;
  *darwin*    ) test -f .profile_bsd && source .profile_bsd;;
  *BSD*       ) test -f .profile_bsd && source .profile_bsd;;
esac

#Grab corporate aliases if we have them
CORPALIAS=~/.work_aliases && test -f $CORPALIAS && source $CORPALIAS

#Loop visualization, call inside for/while loop to get a spinning cursor
Process()
{
  case $toggle
  in
    1)
      echo -n $1" \ "
      echo -ne "\r"
      toggle="2"
    ;;

    2)
      echo -n $1" | "
      echo -ne "\r"
      toggle="3"
    ;;

    3)
      echo -n $1" / "
      echo -ne "\r"
      toggle="4"
    ;;

    *)
      echo -n $1" - "
      echo -ne "\r"
      toggle="1"
    ;;
  esac
}

##################################################
# Fancy PWD display function (thanks ArchWiki!)
##################################################
# The home directory (HOME) is replaced with a ~
# The last pwdmaxlen characters of the PWD are displayed
# Leading partial directory names are striped off
# /home/me/stuff          -> ~/stuff               if USER=me
# /usr/share/big_dir_name -> ../share/big_dir_name if pwdmaxlen=20
##################################################
bash_prompt_command() {
    # How many characters of the $PWD should be kept
    local pwdmaxlen=35
    # Indicate that there has been dir truncation
    local trunc_symbol=".."
    local dir=${PWD##*/}
    pwdmaxlen=$(( ( pwdmaxlen < ${#dir} ) ? ${#dir} : pwdmaxlen ))
    NEW_PWD=${PWD/#$HOME/\~}
    local pwdoffset=$(( ${#NEW_PWD} - pwdmaxlen ))
    if [ ${pwdoffset} -gt "0" ]
    then
        NEW_PWD=${NEW_PWD:$pwdoffset:$pwdmaxlen}
        NEW_PWD=${trunc_symbol}/${NEW_PWD#*/}
    fi
}

bash_prompt() {
    case $TERM in
     xterm*|rxvt*)
         local TITLEBAR='\[\033]0;\u:${NEW_PWD}\007\]'
          ;;
     *)
         local TITLEBAR=""
          ;;
    esac
    local NONE="\[\033[0m\]"    # unsets color to term's fg color

    # regular colors
    local K="\[\033[0;30m\]"    # black
    local R="\[\033[0;31m\]"    # red
    local G="\[\033[0;32m\]"    # green
    local Y="\[\033[0;33m\]"    # yellow
    local B="\[\033[0;34m\]"    # blue
    local M="\[\033[0;35m\]"    # magenta
    local C="\[\033[0;36m\]"    # cyan
    local W="\[\033[0;37m\]"    # white

    # emphasized (bolded) colors
    local EMK="\[\033[1;30m\]"
    local EMR="\[\033[1;31m\]"
    local EMG="\[\033[1;32m\]"
    local EMY="\[\033[1;33m\]"
    local EMB="\[\033[1;34m\]"
    local EMM="\[\033[1;35m\]"
    local EMC="\[\033[1;36m\]"
    local EMW="\[\033[1;37m\]"

    # background colors
    local BGK="\[\033[40m\]"
    local BGR="\[\033[41m\]"
    local BGG="\[\033[42m\]"
    local BGY="\[\033[43m\]"
    local BGB="\[\033[44m\]"
    local BGM="\[\033[45m\]"
    local BGC="\[\033[46m\]"
    local BGW="\[\033[47m\]"

    local UC=$W                 # user's color
    [ $UID -eq "0" ] && UC=$R   # root's color

    PS1="$TITLEBAR${EMK}[${UC}\u${EMK}@${UC}\h ${EMB}\${NEW_PWD}${EMK}]${UC}\\$ ${NONE}"
    # without colors: PS1="[\u@\h \${NEW_PWD}]\\$ "
    # extra backslash in front of \$ to make bash colorize the prompt
}

#Update PWD correctly
PROMPT_COMMAND=bash_prompt_command
bash_prompt
unset bash_prompt

#################################################
# Auto-screen invocation. see: http://taint.org/wk/RemoteLoginAutoScreen
# if we're coming from a remote SSH connection, in an interactive session
# then automatically put us into a screen(1) session.   Only try once
# -- if $STARTED_SCREEN is set, don't try it again, to avoid looping
# if screen fails for some reason.
if [ "$PS1" != "" -a "${STARTED_SCREEN:-x}" = x -a "${SSH_TTY:-x}" != x ]
then
  STARTED_SCREEN=1 ; export STARTED_SCREEN
  [ -d $HOME/lib/screen-logs ] || mkdir -p $HOME/lib/screen-logs
  sleep 1
  screen -RR && exit 0
  # normally, execution of this rc script ends here...
  echo "Screen failed! continuing with normal bash startup"
fi

#Other goodies
source ~/.sudo_package_manager
source ~/.aliases