# source this file to put bash's input line at the top of the screen
# you'll probably also want to set horizontal-scroll-mode in .inputrc so
# if you type a long command, it won't spill over into your scrollback

base_PS1='[\u@\h \W]\$ '
# \e[H moves to top left, \e[K erases to end of line
PS1="\[\e[H\e[K\]$base_PS1"

pre_command () {
    # enable scrolling from line 2 to bottom of screen
    printf "\e[2;${LINES}r"
    # move cursor to bottom of screen, column 1
    printf "\e[${LINES};1H"
    # print command
    printf "\n+ %s\n" "$BASH_COMMAND"

    # re-enable full-screen scrolling for less, which behaves slightly
    # strangely otherwise. will likely need to account for other commands
    # here. fixing this properly for less would probably involve writing a
    # wrapper script that reset the screen before running /usr/bin/less and
    # setting PAGER to it, so that indirect invocations (e.g. via man)
    # would work too
    if [[ $BASH_COMMAND =~ ^[[:space:]]*less([[:space:]]|$) ]]
    then
            printf "\e[r"
    fi
}
trap pre_command DEBUG
clear