Merge feature/wsl-module-script/6.6 into v6.6.87

* commit 'c313d7377ddbf534848625cce7f175389e553e48':
  Fix the structure of the generated VHDX
  Fix shellcheck issues
  Expect script to be running as root/under sudo
  First pass at a script

Author: chessturo

Microsoft/scripts/gen_modules_vhdx.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+set -ueo pipefail
+
+if [ $# -ne 3 ] || [ ! -d "$1" ]; then
+	printf '%s' "Usage ./$0 <modules dir> <kernelversion> <output file>" 1>&2
+	exit 1
+fi
+
+if [ -e "$3" ]; then
+	printf '%s' "Refusing to overwrite existing file $3" 1>&2
+	exit 2
+fi
+
+
+# Calculate modules size (+ 256MiB for slack)
+modules_size=$(du -bs "$1" | awk '{print $1;}')
+modules_size=$((modules_size + (256*(1<<20))))
+
+# Create our scratch directory
+tmp_dir=$(mktemp -d)
+
+# Create a blank image file of the right size
+dd if=/dev/zero of="$tmp_dir/modules.img" bs=1024 count=$((modules_size / 1024))
+
+# Set up fs and mount
+lo_dev=$(losetup --find --show "$tmp_dir/modules.img")
+mkfs -t ext4 "$lo_dev"
+mkdir "$tmp_dir/modules_img"
+mount "$lo_dev" "$tmp_dir/modules_img"
+chmod a+rw "$tmp_dir/modules_img"
+
+# Copy over the contents of $1
+cp -r "$1/lib/modules/$2"/* "$tmp_dir/modules_img"
+umount "$tmp_dir/modules_img"
+
+# Do the final conversion
+qemu-img convert -O vhdx "$tmp_dir/modules.img" "$3"
+
+# Fix ownership since we're probably running under sudo
+if [ -n "$SUDO_USER" ]; then
+	chown "$SUDO_USER:$SUDO_USER" "$3"
+fi
+