#!/bin/bash

get_decompressor() {
    case "$1" in
        *.gz)
            cat=zcat
            of=${1%.gz}
            ;;
        *.bz2)
            cat=bzcat
            of=${1%.bz2}
            ;;
        *)
            cat=cat
            of=$1
            ;;
    esac
}

add_keymap_file() {
    local cat cmd rest f of

    while read f; do
        get_decompressor "$f"
        while read -r cmd rest; do
            if [[ $cmd == include ]]; then
                eval set $rest
                add_keymap_file "$1"
            fi
        done < <($cat "$f")
        add_dir "${of%/*}"
        $cat "$f" > "$BUILDROOT/$of"
    done < <(
        (
            find /usr/share/kbd/keymaps/ -type f -regex ".*/$1\(\.inc\)?\(\.gz\|\.bz2\)?" ;
            find ${1%/*} -maxdepth 1 -type f -regex "$1\(\.inc\)?\(\.gz\|\.bz2\)?" 2>/dev/null
        ) | cat
    )
}

build() {
    # subshell to avoid namespace pollution
    (
        shopt -s nullglob

        [[ -s /etc/vconsole.conf ]] && . /etc/vconsole.conf

        [[ $KEYMAP ]] && add_keymap_file $KEYMAP.map
        [[ $KEYMAP_TOGGLE ]] && add_keymap_file $KEYMAP_TOGGLE.map
    )
}

build

help() {
    cat <<HELPEOF
This hook adds custom keymap(s) specified in vconsole.conf to the image and loads them during early userspace.
HELPEOF
}