#       namespace if this script actually ends up being evaluated in Tcl.
#
namespace eval ::Eagle {
  #
  # NOTE: This is the procedure that detects whether or not we are running
  #       in Eagle (otherwise, it is assumed that we are running in vanilla
  #       Tcl).  This procedure must work correctly in both Tcl and Eagle
  #       and must return non-zero only when running in Eagle.  The same
  #       procedure is also defined in the "init.eagle" file.
  #
  proc isEagle {} {
    #
    # NOTE: Nothing too fancy or expensive should be done here.  In theory,
    #       use of this procedure should be rare; however, in practice, this
    #       procedure is actually used quite a bit (e.g. by the test suite).
    #