Bash prompt with git, error and background jobs information

old Bash prompt

# Description
# ===========
# This will change your prompt to something useful like:
#
#     david@dgarciapc/fix-flux-capacitor:~/projects/manhattan #2    :) $
#     -----   -----         -----                -----         -     |
#       |       |             |                    |           |
#      user  hostname     git branch          current folder  jobs  last command result
# 
# If the last command exit with an error the last bit will change to :(
# 
# Prompt examples
# ===============
# david@dgarciapc:~ #0 :) $ pwd
# /home/david
# david@dgarciapc:~ #0 :) $ cd ~/projects/manhattan
# david@dgarciapc/fix-flux-capacitor:~/projects/manhattan #0 :) $ git checkout master
# david@dgarciapc/master:~/projects/manhattan #0 :) $ yes > /dev/null &
# david@dgarciapc/master:~/projects/manhattan #1 :) $ yes > /dev/null &
# david@dgarciapc/master:~/projects/manhattan #2 :) $ jobs -l
# [1]- 11913 Running                 yes > /dev/null &
# [2]+ 14090 Running                 yes > /dev/null &
# david@dgarciapc/master:~/projects/manhattan #2 :) $ kill 14090
# [2]+  Terminated              yes > /dev/null
# david@dgarciapc/master:~/projects/manhattan #1 :) $ sl
# bash: sl: command not found
# david@dgarciapc/master:~/projects/manhattan #1 :( $ ls
# BUILD UTIL PROJECT_X
# david@dgarciapc/master:~/projects/manhattan #1 :) $
#
# Usage
# =====
# 1. Edit your ~/.bashrc file
# 2. Append the code
# 3. Source the ~/.bashrc file ($ source ~/.bashrc) or open a new terminal
#
############################
### Prompt configuration ###
############################
# Need to get git-prompt:
# wget https://raw.githubusercontent.com/git/git/master/contrib/completion/git-prompt.sh -O ~/.git-prompt.sh
if [ -f ~/.git-prompt.sh ]; then
  . ~/.git-prompt.sh
  GIT_PS1_SHOWDIRTYSTATE=true
  GIT_PS1_SHOWCOLORHINTS=true
  GIT_PS1_SHOWUNTRACKEDFILES=true
  GIT_PS1_SHOWUPSTREAM="auto"
fi

# Colors
PR_PLAIN='\[\e[0m\]'
PR_RED='\[\e[31m\]'
PR_GREEN='\[\e[32m\]\'

# Basic stuff
PR_BASE='\[\033[01;32m\]\u@\h\[\033[00m\]'
PR_GIT='$(__git_ps1 "/%s")'
PR_DIR='\[\033[01;34m\]\w\[\033[00m\]'

# To show the number of jobs
PR_JOBS='
  case "\j" in
    0) echo "";;
    1) echo "𝍠 " ;;
    2) echo "𝍡 " ;;
    3) echo "𝍢 " ;;
    4) echo "𝍣 " ;;
    *) echo "𝍤 " ;;
  esac
'
# To show ok or ko depeding of result of previous command
PR_CMD_RESULT="
  if [ \$LASTCMD -eq 0 ]; then
    echo ${PR_GREEN}✔${PR_PLAIN};
  else
    echo ${PR_RED}❌${PR_PLAIN};
  fi
"

PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]$(__git_ps1 "/%s"):\[\033[01;34m\]\w\[\033[00m\]\$ '
PROMPT_COMMAND='LASTCMD=$? PS1="${debian_chroot:+($debian_chroot)}${PR_BASE}${PR_GIT}:${PR_DIR} \`${PR_JOBS}\` \`${PR_CMD_RESULT}\` \\$ "'