#!/bin/sh
V="0.1-alpha"
echo -ne ".\n.\n.\n."
echo "   BOOT UPDATER-"$V
echo "========================================"
echo "adjusting boot to upgraded kernel"
echo "NOTE: this is just a helper, ensure that all the files are"
echo "properly configured beforehand!"
echo "========================================"
for X in /usr/sbin/grub-mkconfig /sbin/mkinitrd
  do
  if [[ -x $X ]]
    then
    echo "found [$X]"
    else
    echo "[$X] not found, make sure it is installed."
    echo "-Fatal error, exiting."
    exit 2
  fi
done

rk=$(uname -r)
echo "And we seem to be running on $rk kernel"
echo "========================================"

#loop over the symlinks in /boot/
for k in /boot/vmlinuz*
do
  #echo $k; file -b $k
  if file -b $k | grep -q "symbolic link"
    then echo "we have detected an symlink, skippin the symlink"
  fi
  if file -b $k | grep -q "Linux kernel"
    then echo "we have detected an kernel:"
    s=${k#*-}
    v=${s#*-}
    t=${s%-*}
    echo "it is an " $t "version" $v
    if [ "X"$t == "Xgeneric" ]
      then
      echo "does the -generic we're just detected need some maintainence:"
      #check if initrd is needed!
      for i in /boot/initrd-$v*
      do
        if ( file -b $i | grep -q "data" )
          then
            echo "found apparently matching initrd, skipping further action!"
          else
            #check if mkinitrd has our kernel entry
            for kv in $(grep "KERNEL_VERSION=" /etc/mkinitrd.conf | grep -v "uname" | sed "s/KERNEL_VERSION=//" | sed 's/"//g')
              do
              if [ "X"$kv == "X"$v ] && [ "X"$kv != "X" ]
                then
                echo "initrd seems to be configured already"
                else
                echo "editing /etc/mkinitrd.conf!"
                #do it!
                oldline='KERNEL_VERSION="'$kv'"'
                newline='KERNEL_VERSION="'$v'"'
                echo "["$oldline"]-->["$newline"]"
                sed -i'.backup' "s/$oldline/$newline/" /etc/mkinitrd.conf
                grep $newline /etc/mkinitrd.conf
              fi
            done
            #we have appropriate mkintrd.conf now on
            #proceed to make a initrd for the orphan -generic kernel
            /sbin/mkinitrd -F
          fi
      done
    fi
    #not an -generic, no further action needed
  fi
  #not a krenel, but a symlink, no action needed
done
#letting grup ovedo the config file now:

/usr/sbin/grub-mkconfig -o /boot/grub/grub.cfg

# mkinitrd.conf.sample
# See "man mkinitrd.conf" for details on the syntax of this file
#
SOURCE_TREE="/boot/initrd-tree"
CLEAR_TREE="1"
#KERNEL_VERSION="$(uname -r)"
KERNEL_VERSION="5.4.20"
OUTPUT_IMAGE="/boot/initrd-${KERNEL_VERSION}.gz"
#KEYMAP="us"
MODULE_LIST="ext4:usbhid:hid_generic:xhci-hcd"
#LUKSDEV="/dev/sda2"
#LUKSTRIM="/dev/sda2" # verify support with 'hdparm -I $dev | grep TRIM'
#LUKSKEY="LABEL=TRAVELSTICK:/keys/alienbob.luks"
ROOTDEV="/dev/sda3"
ROOTFS="ext4"
#RESUMEDEV="/dev/sda2"
#RAID="0"
#LVM="0"
UDEV="1"
MODCONF="1"
#MICROCODE_ARCH="/boot/intel-ucode.cpio"
#WAIT="1"