[Scons-users] Java builder is rebuilds when not needed

[Pierre-Luc Boily]

So, how Java builder can create the targets when java files are not yet
existing?

this
classes_tgt = env.Java(target='classes',
                       source=java_files_to_be_generated_from_idl)

Can`t create correctly classes_tgt because java files are not yet created
from idl.  Is it possible without creating a custom builder?

Le mer. 29 janv. 2020, à 16 h 12, Bill Deegan <bill at baddogconsulting.com> a
écrit :

> When a file is built, then it would get scanned.
> So likely that's not the case.
>
> On Wed, Jan 29, 2020 at 10:17 AM Pierre-Luc Boily <
> pierreluc.boily at gmail.com> wrote:
>
>> I think I know what the problem is.  At the first scons pass, java files
>> that are generated from idl into the variant dir don't exist yet.  So,
>> scons can`t scan the java file for "package" statement.  That is why the
>> target is
>>
>> classes/fileName.class
>> instead of
>> classes/adacel/speech/fileName.class
>>
>> For this understandable reason, I don't have the choice to create my own
>> builder around the Java builder.  This builder will take care of creating
>> java from idl and create the correct targets in the emitter.
>>
>> Le mer. 29 janv. 2020, à 11 h 32, Pierre-Luc Boily <
>> pierreluc.boily at gmail.com> a écrit :
>>
>>> Hello,
>>>
>>> I have a case where
>>> 1- I am creating java files from idl then
>>> 2- Compile those java files
>>>
>>> All my java files starts with "package adacel.speech;"
>>>
>>> --------------------------------
>>> generated_java_target += env.Command(
>>>                                      target='ActivateGrammar.java',
>>>
>>> source='#sr/speech/common_dds/ActivateGrammar.idl',
>>>                                      action=[idl_command])
>>>
>>> classes_tgt = env.Java(target='classes',
>>>                        source=generated_java_target)
>>> ---------------------------------
>>>
>>> The code above generates all my class files under
>>> "classes/adacel/speech",
>>> which is correct.
>>>
>>> But when I start another build with following code :
>>> for i in classes_tgt:
>>>     print(str(i))
>>>
>>> I can see that all my class targets looks like this :
>>> classes\ActivateGrammar.class
>>>
>>> Which is incorrect.  scons tell me :
>>> scons: building
>>>
>>> `build\sr\speech\ContextualPostProcessor\RulesEngine\DroolsGenericModel\classes\TimeValueHolder.class'
>>> because it doesn't exist
>>>
>>> Scons should look under classes\adacel\speech
>>>
>>> Am I doing something incorrect?  Is this a bug in Java builder?  As a
>>> workaround, I though doing my own builder that takes idl that generates
>>> java
>>> file and build it.  And within the emitter, generate all class targets
>>> that
>>> points to correct path.  It could be faster, because in that case, I
>>> could
>>> generate all java files and compile them at once.
>>>
>>>
>>>
>>> --
>>> Sent from: http://scons.1086193.n5.nabble.com/Users-f16930.html
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