Reproducible filesystem creation - trivial test

comp.sh

#!/bin/bash
set -eu
gen() {
  img="fs-test-$2.img"
  rm -f $img
  fallocate -l 150M $img
  sudo mkfs.$1 $img >/dev/null 2>&1
}
for fs in btrfs jffs2 ext2 ext3 ext4 xfs fat vfat f2fs nilfs2; do
  gen $fs 1
  gen $fs 2
  gen $fs 3
  gen $fs 4
  echo "$fs: "
  cmp fs-test-1.img fs-test-2.img -l | wc -l
  cmp fs-test-1.img fs-test-3.img -l | wc -l
  cmp fs-test-1.img fs-test-4.img -l | wc -l
done