The Ant wrapper script for Unix will source (read and evaluate) the file /.antrc before it does anything. On Windows, the Ant wrapper batch-file
invokes %HOME%antrc_pre.bat at the start and
%HOME%
antrc_post.bat at the end.
You can use these files, for example, to set/unset environment
variables that should only be visible during the execution of Ant. See
the next section for examples.