..screenshot.md

Used font: http://stuff.dasprids.de/fonts/ubuntumono-powerline.tar.bz2

You can patch any font yourself with the fontpatcher: https://github.com/Lokaltog/vim-powerline/tree/develop/fontpatcher

.bashrc

function _update_ps1() {
   export PS1="$(~/bin/powerline-shell.sh $? your-default-username)"
}

export PROMPT_COMMAND="_update_ps1"

powerline-shell.sh

#!/bin/bash

fg_black="\[\033[0;30m\]"
fg_red="\[\033[0;31m\]"
fg_green="\[\033[0;32m\]"
fg_yellow="\[\033[0;33m\]"
fg_blue="\[\033[0;34m\]"
fg_magenta="\[\033[0;35m\]"
fg_cyan="\[\033[0;36m\]"
fg_white="\[\033[0;37m\]"

bg_black="\[\033[40m\]"
bg_red="\[\033[41m\]"
bg_green="\[\033[42m\]"
bg_yellow="\[\033[43m\]"
bg_blue="\[\033[44m\]"
bg_magenta="\[\033[45m\]"
bg_cyan="\[\033[46m\]"
bg_white="\[\033[47m\]"

reset="\[\033[00m\]"

CURRENT_BG='none'
SEGMENT_SEPARATOR='⮀'

fg_color() {
    local varname=fg_$1
    echo ${!varname}
}

bg_color() {
    local varname=bg_$1
    echo ${!varname}
}

# Begin a segment
# Takes two arguments, background and foreground. Both can be omitted,
# rendering default background/foreground.
prompt_segment() {
  local bg fg

  [[ -n $1 ]] && bg="$(bg_color $1)" || bg=""
  [[ -n $2 ]] && fg="$(fg_color $2)" || fg=""
  if [[ $CURRENT_BG != 'none' && $1 != $CURRENT_BG ]]; then
    echo -n " $(fg_color $CURRENT_BG)$bg$SEGMENT_SEPARATOR$fg$bg "
  else
    echo -n "$fg$bg "
  fi
  CURRENT_BG=$1
  [[ -n $3 ]] && echo -n $3
}

# End the prompt, closing any open segments
prompt_end() {
  if [[ -n $CURRENT_BG ]]; then
    echo -n " $reset$(fg_color $CURRENT_BG)$SEGMENT_SEPARATOR $reset"
  fi

  CURRENT_BG=''
}

### Prompt components
# Each component will draw itself, and hide itself if no information needs to be shown

# Context: user@hostname (who am I and where am I)
prompt_context() {
  local user=`whoami`

  if [[ "$user" != "$DEFAULT_USER" || -n "$SSH_CLIENT" ]]; then
    prompt_segment black white "$user@\h"
  fi
}

# Git: branch/detached head, dirty status
prompt_git() {
  local ref dirty
  if $(git rev-parse --is-inside-work-tree >/dev/null 2>&1); then
    dirty=$(git status --porcelain | tail -n1)
    ref=$(git symbolic-ref HEAD 2> /dev/null) || ref="➦ $(git show-ref --head -s --abbrev |head -n1 2> /dev/null)"
    if [[ -n $dirty ]]; then
      dirty='±'
      prompt_segment yellow black
    else
      prompt_segment green black
    fi
    echo -n "${ref/refs\/heads\//⭠ }$dirty"
  fi
}

# Dir: current working directory
prompt_dir() {
  prompt_segment blue black '\w'
}

# Status:
# - was there an error
# - am I root
# - are there background jobs?
prompt_status() {
  local symbols
  symbols=()

  [[ $RETVAL -ne 0 ]] && symbols+="$fg_red$bg_black✘"
  [[ $UID -eq 0 ]] && symbols+="$fg_yellow$bg_black⚡"
  [[ -n "$symbols" ]] && prompt_segment black white "$symbols"
}

## Main prompt
RETVAL=$1
DEFAULT_USER=$2

case "$TERM" in
    xterm*|rxvt*)
        echo -n "\[\e]0;\u@\h: \w\a\]"
    ;;
    *)

    ;;
esac

prompt_status
prompt_context
prompt_dir
prompt_git
prompt_end