#!/usr/bin/bash

build() {
    local symlink

    # device mapper modules
    map add_module \
        'dm-mod' \
        'dm-snapshot' \
        'dm-mirror' \
        'dm-cache' \
        'dm-cache-smq' \
        'dm-thin-pool'

    # from thin-provisioning-tools
    add_binary 'pdata_tools'
    for symlink in cache_{check,dump,metadata_size,repair,restore} thin_{check,delta,dump,ls,metadata_size,repair,restore,rmap,trim}; do
        add_symlink "/usr/bin/${symlink}" 'pdata_tools'
    done

    # udev rules and lvm configuration
    map add_udev_rule \
        '10-dm.rules' \
        '11-dm-lvm.rules' \
        '13-dm-disk.rules' \
        '95-dm-notify.rules' \
        '/usr/lib/initcpio/udev/11-dm-initramfs.rules'

    # this udev rule is specific for systemd and non-systemd systems
    if command -v add_systemd_unit >/dev/null; then
        add_udev_rule '69-dm-lvm.rules'
    else
        add_udev_rule '/usr/lib/initcpio/udev/69-dm-lvm.rules'
    fi

    # config file
    add_file '/etc/lvm/lvm.conf'
    sed -i -e 's/^[[:space:]#]*monitoring = [[:digit:]]\+\s*$/\tmonitoring = 0/' \
        -e '/^$/d' -e '/^[[:space:]]*#/d' "${BUILDROOT}/etc/lvm/lvm.conf"
}

help() {
  cat <<HELPEOF
This hook enables LVM2 volumes in initramfs.
HELPEOF
}