Dracutfile

#!/bin/bash

depends() {
    echo "base bash" # <- dracut modules. can contain everything, even your own kubernetes distro.
    return 0
}

install() {
    # postfix user.
    grep '^postfix:' "$dracutsysrootdir"/etc/passwd >> "$initdir/etc/passwd"
    grep '^postfix:' "$dracutsysrootdir"/etc/group >> "$initdir/etc/group"
    grep '^postdrop:' "$dracutsysrootdir"/etc/group >> "$initdir/etc/group"

    # deps.
    inst "/bin/chgrp"
    inst "/bin/egrep"
    inst "/usr/bin/uname"

    mkdir -p "$initdir/var/lib/postfix"
    chown postfix:postfix "$initdir/var/lib/postfix"

    # perl:
    mapfile -t -d '' _filenames < <(equery files --filter=obj,sym dev-lang/perl 2>/dev/null | tr "\n" "\0")
    inst_multiple "${_filenames[@]}"

    # postfix.
    mapfile -t -d '' _filenames < <(equery files --filter=obj,sym mail-mta/postfix 2>/dev/null | grep -v "init.d" | tr "\n" "\0")
    inst_multiple "${_filenames[@]}"

    # ^ I use my own build server (gentoo based) and here I pack everything that belongs to 
    # a specific package (postfix). dracut resolves dependencies and packs it for me into a
    # tar archive, this archive can be easily imported into podman and used as a container.

    # I exclude all package's files which are placed inside "init.d" folder, because 
    # "/etc/init.d/postfix" contains shebang "#!/sbin/openrc-run", and it brings error 
    # on my system, because I don't use OpenRC, but Systemd and this file just is not available.
}