Hyperv Debian + UEFI

attic/modify_timeout.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+set -exo pipefail
+
+distro="${1}"
+
+# Find URL
+url="$(grep -e url "${distro}" | cut -f2 -d'"')"
+curl -C - -O "${url}"
+
+# Mount and extract
+file=$(printf '%s' "${url}" | sed -E -e 's#.*/(.*)$#\1#')
+work="$(mktemp -d)"
+xorriso -osirrox on -indev "${file}" -extract / "${work}"
+
+# Modify timeout
+chmod -R +w "${work}"
+sed -i -e 's/set timeout=.*/set timeout=30/' "${work}/boot/grub/grub.cfg"
+sed -i -e 's/timeout.*/timeout 300/' "${work}/isolinux/isolinux.cfg"  # Uses 10ths of a second
+chmod -R -w "${work}"
+
+# Create new ISO file
+rm "${file}"
+chmod +w "${work}/ubuntu" "${work}/isolinux/isolinux.bin"
+mkisofs -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -J -R -V "Boot" -r -iso-level 3 -chrp-boot -o "${file}" "${work}"
+new_sum=$(sha256sum "${file}" | cut -f1 -d' ')
+
+# Update distro file
+if [ "$(uname)" == "Darwin" ]; then
+	SED=$(which gsed)
+else
+	SED=$(which sed)
+fi
+"${SED}" -i -e "s/checksum = \".*\"/checksum = \"${new_sum}\"/" "${distro}"
+"${SED}" -i -e "s/url = \".*\"/url = \"${file}\"/" "${distro}"
+"${SED}" -i -e "s/boot_wait = \".*\"/boot_wait = \"15s\"/" "${distro}"
+
+# Cleanup remaining directories
+rm -r "${work}" || true