#!/bin/sh

##
# Wilfredo Sanchez <wsanchez@wsanchez.net>
# Andrew Nesbitt
#
# Sends backups to a backup server.
##

. "$(dirname "$0")/common.sh";

client_load_config;

# FIXME: Make this a command line option.
verbose="false";

#
# Verify SSH keys are set up
#

if [ ! -f "${client_key_file}" ]; then
  error "No client private key file: ${client_key_file}";
  exit 1;
fi;

if [ ! -f "${server_pub_file}" ]; then
  error "No server public key file: ${server_pub_file}";
  exit 1;
fi;

ssh_config_file="$(mktemp -t backup)";
cat > "${ssh_config_file}" <<EOF
User "${backup_user}"
IdentityFile "${client_key_file}"
PasswordAuthentication "no"
UserKnownHostsFile "${server_pub_file}"
StrictHostKeyChecking "yes"
BatchMode "yes"
EOF

if "${verbose}"; then
  rsync_verbose_opts="--verbose --progress --stats";
else
  rsync_verbose_opts="";
fi;

for source in ${backup_locations}; do
  # Sync data to the server
  # Note that most options provided to rsync here are ignored, including
  #   the destination path on the server, because those are overriden on
  #   the server side.
  # FIXME: --rsh option below doesn't handle spaces, etc. in ssh_config.
  output="$(mktemp -t backup)";
  if ! sudo rsync                       \
      ${rsync_verbose_opts}             \
      --rsh="ssh -F ${ssh_config_file}" \
      --archive                         \
        --extended-attributes           \
      --exclude-from="${excludes_file}" \
      --delete                          \
        --delete-excluded               \
        --delete-after                  \
        --force                         \
        --ignore-errors                 \
      "${source}/" "${backup_server}:" > /dev/null 2>&1; then
      if [ $? -ne 0 ] &&                                                                                             \
	 [                                                                                                           \
 	   $(                                                                                                        \
	      egrep -v                                                                                               \
	      '(^file has vanished: |^send_files failed to open |^rsync error: some files could not be transferred)' \
	      "${output}"                                                                                            \
	    ) -ne 0                                                                                                  \
	 ]; then
	  echo "WARNING: Errors while backing up data for ${source}:";
	  cat "${output}";
	  echo "";
      fi;
  fi;
  rm -f "${output}";
done;

rm "${ssh_config_file}";