#!/bin/bash

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

### .... ###
### BASH ###
### '''' ###

__make_ps1d() {
    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"
}

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

make_ps1() {
    # these functions must be already defined by ~/.bash/user/*.bashrc
    # and ~/.bash/host/*.bashrc
    test -n "$SSH_CONNECTION" && local ps1u=$(make_ps1u)
    local ps1h=$(make_ps1h)
    local ps1w="$lblue\w$normal";
    local ps1G='$(__git_ps1 "(%s)")';
    local ps1g="$green$ps1G$normal";
    local ps1D='$(__make_ps1d -r)';
    local ps1d="$lred$ps1D$normal";
    echo "$ps1u$lwhite@$ps1h:$ps1w$ps1g$ps1d\$ ";
}

make_ps2() {
    echo "$white>$yellow>$lyellow>$normal ";
}

# and use to assemble own PS1
export PS1=$(make_ps1)
export PS2=$(make_ps2)

### ...... ###
### OTHERS ###
### '''''' ###

case "$TERM" in

    xterm*|rxvt*|screen*)
        test -n "$SSH_CONNECTION" \
         && __host_id="${HOSTNAME%%.*}:"      # i.e. a remote session
        PROMPT_COMMAND='__save_rv $?; echo -ne "\033]0;$(__make_ps1d)$__host_id${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 $PROMPT_COMMAND.
                    # In any case nested escapes confuse the terminal, so don't
                    # output them.
                    ;;
                "")
                    echo -ne "\033]0;$(__make_ps1d)$__host_id${PWD/$HOME/\~}\$\007"
                    ;;
                *)
                    echo -ne "\033]0;${BASH_COMMAND} ($__host_id${PWD/$HOME/\~})\007"
                    ;;
            esac
        }
        trap show_command_in_title_bar DEBUG
        ;;

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

esac