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#!/usr/bin/env bash

cd $(dirname $0)

CMDFILE="$1"
shift 1

CLUSTER="$1"
if [ -z "$CLUSTER" ] || [ ! -d "cluster/$CLUSTER" ]; then
	echo "Usage: $CMDFILE <cluster name>"
	echo "The cluster name must be the name of a subdirectory of cluster/"
	exit 1
fi
shift 1

if [ -z "$1" ]; then
	NIXHOSTLIST=$(ls cluster/$CLUSTER/node | grep -v '\.site\.')
else
	NIXHOSTLIST="$@"
fi

if [ -z "$ROOT_PASS" ]; then
	read -s -p "Enter remote root password: " ROOT_PASS
	echo
fi

SSH_CONFIG=cluster/$CLUSTER/ssh_config

function header {
	cat <<EOF
export DEPLOYTOOL_ROOT_PASSWORD=$ROOT_PASS
cat > /tmp/deploytool_askpass <<EOG
#!/usr/bin/env sh
echo \$DEPLOYTOOL_ROOT_PASSWORD
EOG
chmod +x /tmp/deploytool_askpass
export SUDO_ASKPASS=/tmp/deploytool_askpass
sudo -A sh - <<EOEVERYTHING
EOF
}

function footer {
	echo EOEVERYTHING
}

function message {
	echo "echo '$@'"
}

function cmd {
	echo "echo '- run $@'"
	echo "$@"
}

function set_env {
	echo "echo '- set $@'"
	echo "export $@"
}

function copy {
	local FROM=$1
	local TO=$2
	cat <<EOF
echo '- write $TO from $FROM'
base64 -d <<EOG | tee $TO > /dev/null
$(base64 <$FROM)
EOG
EOF
}

function copy_secret {
	local FROM=$1
	local TO=$2
	cat <<EOF
echo '- write secret $TO from $FROM'
base64 -d <<EOG | tee $TO > /dev/null
$(base64 <$FROM)
EOG
chown root:root $TO
chmod 0600 $TO
EOF
}

for NIXHOST in $NIXHOSTLIST; do
	NIXHOST=${NIXHOST%.*}

	if [ -z "$SSH_USER" ]; then
		SSH_DEST=$NIXHOST
	else
		SSH_DEST=$SSH_USER@$NIXHOST
	fi

	echo "==== DOING $NIXHOST ===="

	(header; . $CMDFILE; footer) | ssh -F $SSH_CONFIG $SSH_DEST sh -
done