#!/usr/bin/env bash

# XXX: This file isn't *quite* a script.  It is intended to be passed via stdin
# to a node to requisition logic up node creation.  Currently this is done in
# colo_node_requisition using the eval-cat trick.  While this gets us what we
# want, care must be taken to ensure variable expansion happens at the right
# time. Any unescaped variable references ($X) in this file will be expanded by
# eval in colo_node_requisition. Escaped variable references (\$X) will be
# expanded upon execution on the remote node.

if [ ! -f "$SOLANA_LOCK_FILE" ]; then
  exec 9>>"$SOLANA_LOCK_FILE"
  flock -x -n 9 || ( echo "Failed to acquire lock!" 1>&2 && exit 1 )
  [ -n "\$SOLANA_USER" ] && {
    echo "export SOLANA_LOCK_USER=\$SOLANA_USER"
    echo "export SOLANA_LOCK_INSTANCENAME=$INSTANCE_NAME"
    echo "[ -v SSH_TTY -a -f \"\${HOME}/.solana-motd\" ] && cat \"\${HOME}/.solana-motd\" 1>&2"
  } >&9 || ( rm "$SOLANA_LOCK_FILE" && echo "SOLANA_USER undefined" 1>&2 && false )
  9>&-
  cat > /solana-scratch/id_ecdsa <<EOK
$(cat "$SSH_PRIVATE_KEY")
EOK
  cat > /solana-scratch/id_ecdsa.pub <<EOK
$(cat "${SSH_PRIVATE_KEY}.pub")
EOK
  chmod 0600 /solana-scratch/id_ecdsa
  cat > /solana-scratch/authorized_keys <<EOAK
$("$__colo_here"/add-datacenter-solana-user-authorized_keys.sh 2> /dev/null)
$(cat "${SSH_PRIVATE_KEY}.pub")
EOAK
  cp /solana-scratch/id_ecdsa "\${HOME}/.ssh/id_ecdsa"
  cp /solana-scratch/id_ecdsa.pub "\${HOME}/.ssh/id_ecdsa.pub"
  cp /solana-scratch/authorized_keys "\${HOME}/.ssh/authorized_keys"
  cat > "\${HOME}/.solana-motd" <<EOM


$(printNetworkInfo)
$(creationInfo)
EOM

  # XXX: Stamp creation MUST be last!
  touch /solana-scratch/.instance-startup-complete
else
  exec 9<"$SOLANA_LOCK_FILE" && flock -s 9 && . "$SOLANA_LOCK_FILE" && exec 9>&-
  echo "${INSTANCE_NAME} candidate is already \${SOLANA_LOCK_INSTANCENAME}" 1>&2
  false
fi