Add Debian update scripts

distros/debian/11/update.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+root="$(cd "$(dirname "$0")"; pwd)"
+hcl="$root/amd64.pkrvars.hcl"
+
+base="https://cdimage.debian.org/cdimage/archive/latest-oldoldstable/arm64/iso-cd/"
+
+sums="$(curl -L "$base/SHA256SUMS")"
+
+sha="$(echo "$sums" | awk '{print $1}')"
+file="$(echo "$sums" | awk '{print $2}')"
+
+echo "Found $file with sum $sha"
+
+sed -i "$hcl" -E \
+	-e "s,(  url *=).*$,\1 \"$base$file\"," \
+	-e "s,(  checksum *=).*$,\1 \"$sha\","

distros/debian/12/update.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+root="$(cd "$(dirname "$0")"; pwd)"
+hcl="$root/amd64.pkrvars.hcl"
+
+base="https://cdimage.debian.org/cdimage/archive/latest-oldstable/arm64/iso-cd/"
+
+sums="$(curl -L "$base/SHA256SUMS")"
+
+sha="$(echo "$sums" | awk '{print $1}')"
+file="$(echo "$sums" | awk '{print $2}')"
+
+echo "Found $file with sum $sha"
+
+sed -i "$hcl" -E \
+	-e "s,(  url *=).*$,\1 \"$base$file\"," \
+	-e "s,(  checksum *=).*$,\1 \"$sha\","

distros/debian/13/update.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+root="$(cd "$(dirname "$0")"; pwd)"
+hcl="$root/amd64.pkrvars.hcl"
+
+base="https://cdimage.debian.org/cdimage/release/current/amd64/iso-cd/"
+
+sums="$(curl -L "$base/SHA256SUMS" | grep -v -e "-edu-" -e "-mac-")"
+
+sha="$(echo "$sums" | awk '{print $1}')"
+file="$(echo "$sums" | awk '{print $2}')"
+
+echo "Found $file with sum $sha"
+
+sed -i "$hcl" -E \
+	-e "s,(  url *=).*$,\1 \"$base$file\"," \
+	-e "s,(  checksum *=).*$,\1 \"$sha\","