Powerline style prompt for Bash

A Powerline like prompt for Bash:

• Shows some important details about the git branch:
  • Displays the current git branch which changes background color when the branch is dirty
  • A '+' appears when untracked files are present
  • When the local branch differs from the remote, the difference in number of commits is shown along with '⇡' or '⇣' indicating whether a git push or pull is pending
• Changes color if the last command exited with a failure code
• If you're too deep into a directory tree, shortens the displayed path with an ellipsis
• Shows the current Python virtualenv environment
• It's all done in a Python script, so you could go nuts with it

Setup

• This script uses ANSI color codes to display colors in a terminal. These are notoriously non-portable, so may not work for you out of the box, but try setting your $TERM to xterm-256color, because that works for me.

• Patch the font you use for your terminal: see https://github.com/Lokaltog/vim-powerline/wiki/Patched-fonts

• Clone this repository somewhere:

    git clone https://github.com/milkbikis/powerline-bash
  

• Create a symlink to the python script in your home:

    ln -s <path/to/powerline-bash.py> ~/powerline-bash.py
  

  If you don't want the symlink, just modify the path in the .bashrc command below

• Now add the following to your .bashrc:

    function _update_ps1()
    {
       export PS1="$(~/powerline-bash.py $?)"
    }
  
    export PROMPT_COMMAND="_update_ps1"