mydots/dotfiles/bash/post.bashrc

#!/bin/bash

######################################################
### things to do AFTER host/user-specific settings ###
######################################################

__bashum__lastrv() {
    local rvfile="$RV_TMP/$$.lastrv"
    local lastrv="$(cat "$rvfile")"
    local do_rm=false
    test "$1" == "-r" && do_rm=true
    if [ "0$lastrv" -gt 0 ];
    then
        echo "!$lastrv!"
    else
        echo ""
    fi
    $do_rm && rm -f "$rvfile"
}

__bashum__save_rv() {
    local rvfile="$RV_TMP/$$.lastrv"
    [ -w "${rvfile%/*}" ] && echo "$1" > "$rvfile"
}

__bashum__mkps1() {
    # these functions must be already defined by ~/.bash/user/*.bashrc
    # and ~/.bash/host/*.bashrc
    test -n "$SSH_CONNECTION" \
     && echo -n "$(__bashum__mkps1user)"    # username only when on ssh
    echo -n "$lwhite@"                      # nice shiny at sign
    echo -n "$(__bashum__mkps1host):"       # hostname colored per host
    echo -n "$lblue\w$normal"               # current workdir
    echo -n "$green"                        #\
    echo -n     '$(__git_ps1 "(%s)")'       # > git's PS1
    echo -n "$normal"                       #/
    echo -n "$lred"                         #\
    echo -n     '$(__bashum__lastrv -r)'    # > last exit status (nothing if zero)
    echo -n "$normal"                       #/
    echo '$ '                               # obligatory dollar
}

__bashum__mkps2() {
    echo "$white>$yellow>$lyellow>$normal "
}

# and use to assemble own PS1
export PS1=$(__bashum__mkps1)
export PS2=$(__bashum__mkps2)


__bashum__setup_prompt_command() {

    case "$TERM" in

        xterm*|rxvt*|screen*)
            test -n "$SSH_CONNECTION" \
             && __host_id="${HOSTNAME%%.*}:"      # i.e. a remote session
            PROMPT_COMMAND='__bashum__save_rv $?; echo -ne "\033]0;$(__bashum__lastrv)$__host_id${PWD/$HOME/\~}\$\007"'

            # Show the currently running command in the terminal title:
            # http://www.davidpashley.com/articles/xterm-titles-with-bash.html
            show_command_in_title_bar()
            {
                case "$BASH_COMMAND" in
                    *\033]0*)
                        # The command is trying to set the title bar as well;
                        # this is most likely the execution of $PROMPT_COMMAND.
                        # In any case nested escapes confuse the terminal, so don't
                        # output them.
                        ;;
                    "")
                        echo -ne "\033]0;$(__bashum__lastrv)$__host_id${PWD/$HOME/\~}\$\007"
                        ;;
                    *)
                        echo -ne "\033]0;${BASH_COMMAND} ($__host_id${PWD/$HOME/\~})\007"
                        ;;
                esac
            }
            trap show_command_in_title_bar DEBUG
            ;;

        *)
            PROMPT_COMMAND='__bashum__save_rv $?;'
            ;;

    esac
}

__bashum__setup_prompt_command

tasknag