.bashrc

# Exports
export EDITOR=vim

# History
HISTCONTROL=ignoreboth # don't put duplicate lines or lines starting with space in the history.
shopt -s histappend # append to the history file, don't overwrite it
HISTSIZE=1500
HISTFILESIZE=4000

# General bash stuff
shopt -s checkwinsize # check the window size after each command and, if necessary, update the values of LINES and COLUMNS
[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)" # make less more friendly for non-text input files, see lesspipe(1)

# Add bash aliases.
if [ -f ~/.bash_aliases ]; then
    source ~/.bash_aliases
fi

# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
if ! shopt -oq posix; then
  if [ -f /usr/share/bash-completion/bash_completion ]; then
    . /usr/share/bash-completion/bash_completion
  elif [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
  fi
fi

# Much of what is below has been tweaked from
# https://github.com/cowboy/dotfiles

# git branch (gb) with descriptions
function gb() {
  branches=$(git for-each-ref --format='%(refname)' refs/heads/ | sed 's|refs/heads/||')
  for branch in $branches; do
    desc=$(git config branch.$branch.description)
    if [ $branch == $(git rev-parse --abbrev-ref HEAD) ]; then
      branch="* \033[0;32m$branch\033[0m"
     else
       branch="  $branch"
     fi
     echo -e "$branch \033[0;36m$desc\033[0m"
  done
}

# ANSI CODES - SEPARATE MULTIPLE VALUES WITH ;
#
#  0  reset          4  underline
#  1  bold           7  inverse
#
# FG  BG  COLOR     FG  BG  COLOR
# 30  40  black     34  44  blue
# 31  41  red       35  45  magenta
# 32  42  green     36  46  cyan
# 33  43  yellow    37  47  white

if [[ ! "${prompt_colors[@]}" ]]; then
  prompt_colors=(
    "1;32" # information color
    "1;37" # bracket color
    "31" # error color
  )

  if [[ "$SSH_TTY" ]]; then
    # connected via ssh
    prompt_colors[0]="32"
  elif [[ "$USER" == "root" ]]; then
    # logged in as root
    prompt_colors[0]="35"
  fi
fi

# Inside a prompt function, run this alias to setup local $c0-$c9 color vars.
alias prompt_getcolors='prompt_colors[9]=; local i; for i in ${!prompt_colors[@]}; do local c$i="\[\e[0;${prompt_colors[$i]}m\]"; done'

# Exit code of previous command.
function prompt_exitcode() {
  prompt_getcolors
  [[ $1 != 0 ]] && echo " $c2$1$c9"
}

# Git status.
function prompt_git() {
  prompt_getcolors
  local status output flags
  status="$(git status 2>/dev/null)"
  [[ $? != 0 ]] && return;
  output="$(echo "$status" | awk '/# Initial commit/ {print "(init)"}')"
  [[ "$output" ]] || output="$(echo "$status" | awk '/# On branch/ {print $4}')"
  [[ "$output" ]] || output="$(git branch | perl -ne '/^\* (.*)/ && print $1')"
  flags="$(
    echo "$status" | awk 'BEGIN {r=""} \
      /^# Changes to be committed:$/        {r=r "+"}\
      /^# Changes not staged for commit:$/  {r=r "!"}\
      /^# Untracked files:$/                {r=r "?"}\
      END {print r}'
  )"
  if [[ "$flags" ]]; then
    output="$output$c1:$c0$flags"
  fi
  echo "$c1 git:$c0$output$c9"
}

# Maintain a per-execution call stack.
prompt_stack=()
trap 'prompt_stack=("${prompt_stack[@]}" "$BASH_COMMAND")' DEBUG

function prompt_command() {
  local exit_code=$?
  # If the first command in the stack is prompt_command, no command was run.
  # Set exit_code to 0 and reset the stack.
  [[ "${prompt_stack[0]}" == "prompt_command" ]] && exit_code=0
  prompt_stack=()

  # Manually load z here, after $? is checked, to keep $? from being clobbered.
  [[ "$(type -t _z)" ]] && _z --add "$(pwd -P 2>/dev/null)" 2>/dev/null

  # While the simple_prompt environment var is set, disable the awesome prompt.
  [[ "$simple_prompt" ]] && PS1='\n$ ' && return

  prompt_getcolors

  PS1="\n"
  # history #: !234
  PS1="$PS1$c0!\!$c1$c9 "
  # date: HH:MM:SS
  PS1="$PS1$c0$(date +"%H$c1:$c0%M$c1:$c0%S")$c1$c9"
  # path: [user@host:path] "$PS1$c1[$c0\u$c1@$c0\h$c1:$c0\w$c1]$c9"
  PS1="$PS1    $c0\w$c1   " # [path]
  # git: git:branch:flags
  PS1="$PS1$(prompt_git)"
  # exit code: 127
  PS1="$PS1$(prompt_exitcode "$exit_code")"
  PS1="$PS1\n$c0  ♣_( ♥_♥ )_♣  $c9"
}

PROMPT_COMMAND="prompt_command"