added hooks

README.md

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+# Grub reinstallation hook for pacman
+
+This hook would re-install and re-configiure grub after any changes on Grub package in Arch Linux repository, such as **upgrade** or **reinstallation** 
+
+
+
+
+Parch Linux [website](https://parchlinux.com)

hooks/90-grub-disk-type.hook

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+[Trigger]
+Operation = Upgrade
+Operation = Install
+Type = Package
+Target = grub
+[Action]
+Description = Reinstall and remake GRUB configuration
+When = PostTransaction
+Exec = /bin/bash -c '/etc/pacman.d/hooks/90-grub-disk-type.sh'

hooks/90-grub-disk-type.sh

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+#!/bin/bash
+
+# Check if the system is running in UEFI mode
+if [[ -d "/sys/firmware/efi" ]]; then
+    # UEFI mode detected
+    echo "UEFI system detected. Reinstalling GRUB for UEFI..."
+    grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=GRUB
+else
+    # Legacy (BIOS) mode detected
+    echo "Legacy (BIOS) system detected. Reinstalling GRUB for BIOS..."
+
+    # Find the primary disk for MBR installations
+    primary_disk=$(lsblk -o NAME,SIZE,MOUNTPOINT -nl | awk '$3=="/" {print $1}' | sed 's/[0-9]//g')
+
+    if [[ -n "$primary_disk" ]]; then
+        grub-install --target=i386-pc --recheck "/dev/$primary_disk"
+    else
+        echo "Error: Unable to determine primary disk. Check your configuration."
+        exit 1
+    fi
+fi
+
+# Generate GRUB configuration
+grub-mkconfig -o /boot/grub/grub.cfg
+