Question

Ant doesn't create class files on error with failonerror=false

Asked by: csgeekpyro

I have a large project (read: lots of other engineers) that I'm trying to set up to use Ant.  We all develop with Eclipse, and eclipse seems to have no problem compiling code from projects with broken code in them, until it tries to execute that code.

When I use the following compile job in ant:

<javac srcdir="." destdir="${output-directory}/temp" nowarn="true" failonerror="false">
  <!-- some classpath, excludes would be here, I trimmed them to keep it short -->
</javac>

The compile is successful with errors, however the temp directory (they're in there so I can jar them and delete the dir later) is completely empty.

What gives?

Thanks,
-Tom

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Asked On
2005-09-30 at 09:30:50ID21579994
Tags

ant

,

failonerror

,

javac

Topics

Java Programming Language

,

J2EE

Participating Experts
4
Points
0
Comments
12

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Answers

 

by: girionisPosted on 2005-09-30 at 09:43:20ID: 14993898

> The compile is successful with errors

What errors? If there are errors then the compilation is not successful. Are they errors or warnings?

 

by: csgeekpyroPosted on 2005-09-30 at 09:49:47ID: 14993962

They're errors.  What I meant to say was, "the ant target completes successfully", not the compile.  Is there something going on with the way ant compiles java to not write classfiles to disk unless there were no errors?

 

by: girionisPosted on 2005-09-30 at 10:09:35ID: 14994118

I think this is the case. Ant won't write any files unless the compilation is successfull. The same happens when compiling files without using ant. Class files won't show as output unless everything is fine. Or am I wrong?

 

by: actonwangPosted on 2005-09-30 at 10:55:18ID: 14994595

>> srcdir="."

   Can you change it so that it explictly points to src directory?

Acton

 

by: girionisPosted on 2005-09-30 at 11:01:34ID: 14994639

> Can you change it so that it explictly points to src directory?

Nice catch :) Maybe the ant file is not in the same folder with the java source files.

 

by: csgeekpyroPosted on 2005-09-30 at 12:38:23ID: 14995389

I tried it both ways.  The files are getting found and everything, and the same settings work for the other 2 build targets that work fine.  It's just the one with errors that causes ant to not make the files.

I've also tried the fork="true" parameter to get it to invoke the compiler directly, but that doesn't work either (though ant reports less errors).

 

by: matthewdflemingPosted on 2005-09-30 at 14:16:14ID: 14996221

I think girionis is right about this one.. No compiler should generate a compiled class file for a source file that doesn't compile..   I doubt Eclipse does either.  Did you check in the bin directory (or where ever your classes compile to) in Eclipse?

 

by: csgeekpyroPosted on 2005-09-30 at 15:38:37ID: 14996632

Well, I've figured it out...

The Eclipse internal compiler uses a line-by-line compilation method which can compile "broken" source files by just omitting the lines that have errors on them.  The application only goes nuts when you try to execute the broken code.

I'm not sure whether to accept an answer and split the points (since the comments DID lead me to wonder what Eclipse's internal compiler was doing under the hood), or to ask for the question to be closed (since there really isn't a solution to this, and this question probably won't help anyone else).

Unless someone has an objection in the next 1-2 days, I'm gonna request this question be closed.

Thanks to all that helped :)

-Tom

 

by: girionisPosted on 2005-10-02 at 05:05:37ID: 15001646

It's fine by me, ask a mod to PAQ the question and refund the points :)

 

by: girionisPosted on 2005-10-05 at 05:37:22ID: 15021129

Fine by me :)

 

by: LunchyPosted on 2005-10-07 at 14:16:57ID: 15042289

Closed, 500 points refunded.
Lunchy
Friendly Neighbourhood Community Support Admin

20120131-EE-VQP-002

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