winesapOS/rootfs/usr/local/bin/winesapos-resize-root-file-system.sh

#!/bin/bash

set -x

# Example output: "/dev/mmcblk0p5" (SD card or eMMC), "/dev/nvme0n1p5" (NVMe), or "/dev/sda5" (SATA)
root_partition=$(mount | grep 'on \/ ' | awk '{print $1}')

if [[ "${root_partition}" == "/dev/mapper/cryptroot" ]]; then
    # Example output: "mmcblk0p5", "nvme0n1p5", "sda5"
    root_partition_shortname=$(lsblk -o name,label | grep winesapos-luks | awk '{print $1}' | grep -o -P '[a-z]+.*')
    # Example output: 5
    root_partition_number=$(echo "${root_partition_shortname}" | grep -o -P "[0-9]+$")

    if echo "${root_partition}" | grep -q nvme; then
        # Example output: /dev/nvme0n1
        root_device=$(echo "/dev/${root_partition_shortname}" | grep -P -o "/dev/nvme[0-9]+n[0-9]+")
    else
        if echo "${root_partition}" | grep -q mmcblk; then
            # Example output: /dev/mmcblk0
            # shellcheck disable=SC2026
            root_device=$(echo "/dev/${root_partition_shortname}" | grep -P -o "/dev/mmcblk[0-9]+")
        else
            # Example output: /dev/sda
            # shellcheck disable=SC2026
            root_device=$(echo "/dev/${root_partition_shortname}" | sed s'/[0-9]//'g)
        fi
    fi

    growpart "${root_device}" "${root_partition_number}"
    echo "password" | cryptsetup resize "${root_partition}"
else
    root_partition_number=$(echo "${root_partition}" | grep -o -P "[0-9]+$")

    if echo "${root_partition}" | grep -q nvme; then
        root_device=$(echo "${root_partition}" | grep -P -o "/dev/nvme[0-9]+n[0-9]+")
    else
        if echo "${root_partition}" | grep -q mmcblk; then
            root_device=$(echo "${root_partition}" | grep -P -o "/dev/mmcblk[0-9]+")
        else
            # shellcheck disable=SC2001 disable=SC2026
            root_device=$(echo "${root_partition}" | sed s'/[0-9]//'g)
        fi
    fi

    growpart "${root_device}" "${root_partition_number}"
fi

btrfs filesystem resize max /