write image file $1 to the device $2

dd-ext.sh

#!/bin/bash

# write image file $1 to the device $2

if [ "${1%.gz}" = "${1}" ]; then
  if [ "${1%.xz}" = "${1}" ]; then
    if [ "${1%.zip}" = "${1}" ]; then
      # Assuming uncompressed image for the unknown extensions
      set -x
      time dd if="$1" of=$2 bs=4M status=progress conv=fsync
    else
      set -x
      time unzip -p "$1" | dd of=$2 bs=4M status=progress conv=fsync
    fi
  else
    set -x
    time xzcat "$1" | dd of=$2 bs=4M status=progress conv=fsync
  fi
else
  set -x
  time gunzip -c "$1" | dd of=$2 bs=4M status=progress conv=fsync
fi