Ant task to create java stub from .proto files in all platforms

[Prakash Rao]

Hi,
Is there a way to automate java stub creation from .proto files using
ant task in all platforms? And can this be done without using
protoc.exe, which is platform specific?

I saw the below ant task and it uses protoc.exe, which is only for
windows.

<exec executable="protoc">
<arg value="--java_out=outdir" />
<arg value="--proto_path=srcdir" />
<arg value="srcdir/path/to/input.proto" />
</exec>

And has any one tried this (or any other) ant task in windows/cygwin
to generate java stub from .proto files?

Regards,
Prakash

[Josh Hartman]

Actually, I'm going to have to address this pretty soon for my company as well. The biggest problem is compatibility between the different OSes. We don't have to worry about Windows, but we will have to support OSX, Linux, and probably Solaris for building .proto files. With static linking it's definitely possible to reduce the number of dependencies for the binary as shown on OSX below. I don't know how far we can go with static linking - I wasn't able to statically link libz which is a bit surprising. I think the correct solution will be to package 3 different binaries into our build system, switch on the OS, and invoke the proper protoc. I wish Google had written protoc in something like Python or Java rather than C++ to circumvent this problem, but I really can't complain about free, high quality software.

otool -L `which protoc`

/usr/local/bin/protoc:

/usr/local/lib/libprotobuf.4.dylib (compatibility version 5.0.0, current version 5.0.0)

/usr/local/lib/libprotoc.4.dylib (compatibility version 5.0.0, current version 5.0.0)

/usr/lib/libz.1.dylib (compatibility version 1.0.0, current version 1.2.3)

/usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current version 7.4.0)

/usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0)

/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 111.1.4)

otool -L src/protoc 

src/protoc:

/usr/lib/libz.1.dylib (compatibility version 1.0.0, current version 1.2.3)

/usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current version 7.4.0)

/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 111.1.5)

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[Kenton Varda]

On Tue, Aug 10, 2010 at 8:34 AM, Prakash Rao <prakash...@gmail.com> wrote:

I saw the below ant task and it uses protoc.exe, which is only for
windows.

protoc runs on all platforms, not just windows.  You have to compile it from sources on other platforms.

[Prakash Rao]

Yes, I agree to what you are saying Josh. I was looking something
similar to wsdl2java (purely java) which is platform independent. I'm
not sure whether this is something going to come in future versions.

I tried the ant task which i listed above and it worked in windows/
cygwin.

Thanks a lot Josh & Kenton.

Regards,
Prakash

On Aug 11, 2:43 am, Kenton Varda <ken...@google.com> wrote: