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#!/bin/bash

set -o pipefail

[[ "$TERM" = *color ]] && mitFarbe=true || mitFarbe=false

[ -z "$PS1Start" ] && [ -z "$PS1Ende" ] &&
  if echo "$PS1" | grep -q "\S"
  then
    PS1Ende="$(echo "$PS1" | sed 's|^.*[^\]\(\\\?[$#>]\s*\([]\\[0-9m]\)*\s*\)$|\1|')"
    PS1Start="$(echo "$PS1" | sed 's|\\\?[$#>]\s*\([]\\[0-9m]\)*\s*$||')"
  else
    PS1Ende=""
    PS1Start="$PS1"
  fi

PS1="$PS1Start"

if branch=$(git branch 2>/dev/null | grep '^\*' | sed "s|^\*\s*||") && status=$(git status --porcelain 2> /dev/null)
then
  PS1="$PS1 "
  echo "$status" | grep -q "^.\S" && wtClean=false || wtClean=true
  echo "$status" | grep -q "^\S" && idxClean=false || idxClean=true
  if $mitFarbe
  then
    if ! $wtClean
    then
      PS1="$PS1\[\033[01;31m\]"
    elif ! $idxClean
    then
      PS1="$PS1\[\033[01;33m\]"
    else
      PS1="$PS1\[\033[01;32m\]"
    fi
  fi
  PS1="$PS1$branch"
  if $mitFarbe
  then
    PS1="$PS1\[\033[00m\]"
  else
    if ! $wtClean
    then
      PS1="$PS1!"
    elif ! $idxClean
    then
      PS1="$PS1+"
    fi
  fi
fi

PS1="$PS1$PS1Ende"