dracutをインストールされている全てのカーネルで実行するスクリプト

mkinitrd

#!/usr/bin/env bash

set -euo pipefail

Force=false

# shellcheck source=/dev/null
#source <(curl -sL https://raw.githubusercontent.com/Hayao0819/FasBashLib/build-0.2.x/fasbashlib.sh)

PrintArray(){ printf '%s\n' "${@}"; }
Bool(){ [[ "${1,,}" = true ]]; }
Array.Includes(){ eval "PrintArray \"\${${1}[@]}\"" | grep -qx "${2}"; }

GetKernelListFromBoot(){
    find "/boot" -mindepth 1 -maxdepth 1 -name "vmlinuz-*" -printf "%f\n" | sed 's/vmlinuz-//' | sort -r
}

GetKernelListFromModuleDir(){
    find "/lib/modules/" -mindepth 1 -maxdepth 1 -type d -printf "%f\n" | sort -r
}

GetMakableKernelList(){
    local kernel module=()
    # shellcheck disable=SC2034
    readarray -t module < <(GetKernelListFromModuleDir)
    while read -r kernel; do
        if Array.Includes module "$kernel"; then
            echo "$kernel"
        fi
    done < <(GetKernelListFromBoot)
}


Main(){
    local kernel initramfs
    while read -r kernel; do
        initramfs="/boot/initramfs-${kernel}.img"
        if [[ -f "$initramfs" ]] && ! Bool "$Force"; then
            echo "initramfs-${kernel}.img already exists" >&2
            continue
        fi
        dracut "$@" "$initramfs" "$kernel"
    done < <(GetMakableKernelList)
}


if PrintArray "$@" | grep -qx -e "-f" -e "--force"; then
    Force=true
fi

Main "$@"