Prompt command

.bashrc

  function __prompt_command_generator() {
    PS1=""

    local TXTRED='\[\e[0;31m\]'       # red
    local TXTGRN='\[\e[0;32m\]'       # green
    local TXTYLW='\[\e[0;33m\]'       # yellow
    local TXTBLU='\[\e[0;34m\]'       # blue
    local TXTPUR='\[\e[0;35m\]'       # purple
    local TXTCYN='\[\e[0;36m\]'       # cyan
    local TXTWHT='\[\e[0;37m\]'       # white
    local BLDRED='\[\e[1;31m\]'       # red    - Bold
    local BLDGRN='\[\e[1;32m\]'       # green
    local BLDYLW='\[\e[1;33m\]'       # yellow
    local BLDBLU='\[\e[1;34m\]'       # blue
    local BLDPUR='\[\e[1;35m\]'       # purple
    local BLDCYN='\[\e[1;36m\]'       # cyan
    local BLDWHT='\[\e[1;37m\]'       # white
    local TXTRST='\[\e[0m\]'          # Text reset

    # if [[ $TERM == screen* ]]; then
    # PS1='\[\033k\033\\\]'"$BLDPUR$WINDOW$TXTRST|" # для screen
    # fi
    PS1+='$(__LAST_EXIT="$?";'        # This needs to be first


    #mark root as red
    PS1+='[[ $UID -eq 0 ]] && echo -n "'$TXTRED'" || echo -n "'$TXTCYN'";'
    PS1+='echo -n "\u'$TXTRST'";'

    #hide host name if we are on a local machine
    if [[ -n "$SSH_CLIENT" || -n "$SSH_TTY" ]]; then
      PS1+='echo -n "@'$TXTYLW'\h'$TXTRST'";'
    fi

    #append current path
    PS1+='echo -n " '$BLDBLU'\W";'

    #append git branch
    if hash git 2>/dev/null; then
      PS1+='__GIT_BRANCH=$(git rev-parse --abbrev-ref HEAD 2> /dev/null);'
      PS1+='[[ -n "$__GIT_BRANCH" ]] && echo -n "'$TXTBLU'(${__GIT_BRANCH})";'
      PS1+='unset __GIT_BRANCH;'
    fi

    #show exit code
    PS1+='[[ $__LAST_EXIT -eq 0 ]] && echo -n "'$BLDGRN'" || echo -n "'$BLDRED'";';
    PS1+='unset __LAST_EXIT)'

    PS1+="\n\\\$ $TXTRST"
  }

  # we do not need use this in non-interactive terminals e.g. scp
  if [[ $- == *i* ]]; then
    # unset if defined system-wide
    unset PROMPT_COMMAND
    __prompt_command_generator
  fi
  unset __prompt_command_generator