function require_variables
    set COUNT_NOT_SET 0
    for arg in $argv
        if not set -q $arg
            echo $arg
            set COUNT_NOT_SET (math $COUNT_NOT_SET + 1)
        end
    end
    return $COUNT_NOT_SET
end

function error_if_not_set
  set NOT_SET (require_variables $argv)
  set COUNT_NOT_SET $status
  for arg in $NOT_SET
      error_message "$arg is not set and is required"
  end
  return $COUNT_NOT_SET
end

function ebpresto
  error_if_not_set EB_PRESTO_SERVER EB_PRESTO_USER
  if test $status -ne 0
      return $status
  end
  set PRESTO_PATH /usr/local/bin/presto
  if not test -e $PRESTO_PATH
      error_message "presto does not appear to be installed at $PRESTO_PATH"
  end
  eval $PRESTO_PATH --server $EB_PRESTO_SERVER --user $EB_PRESTO_USER $argv
end

# source private variables if exist
set -x PRIVATE_VARIABLES_FILE "$DOTFILES/fish/private_variables.fish"
test -e "$PRIVATE_VARIABLES_FILE"; and source $PRIVATE_VARIABLES_FILE

/fish/private_variables.fish