Lots of improvements everywhere

distros/centos-9stream-x86_64.pkrvars.hcl.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+set -ex
+
+# Name of the file to write out
+name="${0%.sh}"
+
+baseurl="https://mirror.stream.centos.org/9-stream/BaseOS/x86_64/iso/CentOS-Stream-9-latest-x86_64-boot.iso"
+checksums="$(mktemp)"
+until curl -f -L -o "${checksums}" "${baseurl}.SHA256SUM"; do
+	sleep 1
+done
+sha="$(cat "${checksums}" | awk '/SHA256/ {print $4}')"
+rm "${checksums}"
+
+cat << EOF > "${name}"
+distro = "centos"
+version = "9stream"
+iso = {
+	url = "${baseurl}"
+	checksum = "${sha}"
+}
+boot_command = [
+  "<up><tab><wait><bs><bs><bs><bs><bs>",
+  "inst.text inst.ks=cdrom:/http/centos/9stream-x86_64.ks console=tty0",
+  "<enter><wait>"
+]
+EOF