#!/usr/bin/env bash

set -euo pipefail

first_server="${SERVERS%% *}"
previous_manifest=$(ssh -T "root@$first_server" << EOF
if [[ -f "$GCROOTDIR/${NAME}.yml" ]]; then
	cat "$GCROOTDIR/${NAME}.yml"
fi
EOF
)

set +e
if [ -z "$previous_manifest" ]; then
	echo No previous manifest found!
else
	$DYFF between <(echo $previous_manifest) $MANIFEST \
		--exclude-regexp metadata.labels.kubenix/hash \
		--exclude-regexp labels.kubenix/hash \
		--set-exit-code 

	if [ $? -eq 0 ]; then
		exit 0
	fi
fi
set -e

read -r -p "Continue? " response

echo Uploading closure...
for server in $SERVERS; do
	echo Uploading closure to $server...
	nix copy --to "ssh://root@$server.dmz" $MANIFEST
	ssh "root@$server.dmz" "mkdir -p $GCROOTDIR && ln -sf $MANIFEST $GCROOTDIR/${NAME}.yml"
done

echo Applying Kubernetes manifest...
export KUBECTL_APPLYSET=true
vals eval -fail-on-missing-key-in-map <$MANIFEST | \
kubectl apply -f - \
	--prune \
	--applyset applyset-$NAME \
	--namespace $NAMESPACE