msimerson/Mail-Toaster-6

#!/bin/sh

# see examples in provision/centos and provision/ubuntu

configure_linuxulator()
{
    tell_status "enabling Linux emulation on Host (loads kernel modules)"
    sysrc linux_enable=YES
    sysrc linux_mounts_enable=NO
    service linux start

    tell_status "enabling Linux emulation in jail"
    stage_sysrc linux_enable=YES
    stage_sysrc linux_mounts_enable=NO
    stage_exec service linux start
}

configure_apt_sources()
{
    case "$1" in
        bionic|focal|jammy)
            tell_status "restoring APT sources"
            tee "$STAGE_MNT/compat/linux/etc/apt/sources.list" <<EO_UB_SOURCES
deb http://archive.ubuntu.com/ubuntu $1 main universe restricted multiverse
deb http://security.ubuntu.com/ubuntu/ $1-security universe multiverse restricted main
deb http://archive.ubuntu.com/ubuntu $1-backports universe multiverse restricted main
deb http://archive.ubuntu.com/ubuntu $1-updates universe multiverse restricted main
EO_UB_SOURCES
            ;;
        bullseye)
            tell_status "adding APT sources"
            tee "$STAGE_MNT/compat/linux/etc/apt/sources.list" <<EO_DEB_SOURCES
deb http://deb.debian.org/debian $1 main contrib non-free
deb http://deb.debian.org/debian-security/ $1-security main contrib non-free
deb http://deb.debian.org/debian $1-updates main contrib non-free
deb http://deb.debian.org/debian $1-backports main contrib non-free
EO_DEB_SOURCES
    esac
}

install_apt_updates()
{
    tell_status "updating apt"
    stage_exec chroot /compat/linux apt update || exit 1

    tell_status "updating installed apt packages"
    stage_exec chroot /compat/linux apt upgrade -y || exit 1
}

install_linux()
{
    # tested with values of $1:
    #   Ubuntu: bionic (18), focal (20) and jammy (22)
    #   Debian: bullseye (11), bookwork (12)
    #   CentOS: centos (7)

    configure_linuxulator

    case "$1" in
        centos)
            tell_status "installing $1"
            stage_pkg_install linux_base-c7 || exit 1
        ;;
        bionic|bookworm|bullseye|focal|jammy)
            tell_status "installing (debian|ubuntu) $1"
            stage_pkg_install debootstrap || exit 1
            stage_exec debootstrap $1 /compat/linux
            configure_apt_sources $1
        ;;
    esac

    case "$1" in
        bionic) stage_exec chroot /compat/linux apt remove -y rsyslog ;;
        jammy)  stage_exec mount -t devfs devfs /compat/linux/dev ;;
    esac

    case "$1" in
        bionic|focal|jammy|bullseye) install_apt_updates ;;
    esac

    case "$1" in
        jammy) stage_exec umount /compat/linux/dev ;;
    esac
}