----- Original Message -----
Sent: Wednesday, December 27, 2000 7:29
PM
Subject: uptodate and more general
dependencies
Ant 1.3 provides
for a mapper that allows the definition of mapping between a
fileset and
derived files for testing "uptodate", including a "merge"
mapping
that goes from a
set of giles to a single file (such as a .jar or .zip).
Several kinds of
build activities go from a single file to many files. The one
I
am encountering
all the time is code generation for CORBA, where a single
.idl file is
converted into many .java files. I'd probably handle this
as
<uptodate
property="idlgen.uptodate">
<srcfiles dir="${idl.dir}" name="some.idl" />
<targetfiles dir="${java.out.dir}/some" />
</uptodate>
Then
srcfiles AND targetfiles are FileSets and only if all targets
are
more recent
than all sources is the target up to date. In some
cases
it is common to
idlgenerate a set of idl files into many java files in one
operation,
so often srcfiles
will actually be in the form "*.idl" or some more general
FileSet.
This also
suggests that mapping might be an element of a fileset,
somehow.
<fileset
id=obj.files>
<mapping type="glob" from="*.c" to="*.o" />
<fileset refid=c.files />
</fileset>
sorry for
the long append...
____________________________________________________
Marvin Greenberg
Eidea
Labs, Inc
