[Scons-users] building Java classes from two directories

[Bill Deegan]

Rob,

If you can create a toy project to demonstrate the issue that would be very
helpful in tracking down the issue.

Thanks,
Bill
Co-Manager SCons project

On Mon, Feb 8, 2016 at 9:48 AM, Rob Boehne <robb at datalogics.com> wrote:

> I modified my build to create a list of all the files in both directories,
> but the resulting javac command has only a single source file included.
> Would that be expected?  If not I’ll have to create a toy project to
> demonstrate the problem.
>
> From: Scons-users <scons-users-bounces at scons.org> on behalf of William
> Blevins <wblevins001 at gmail.com>
> Reply-To: SCons users mailing list <scons-users at scons.org>
> Date: Thursday, February 4, 2016 at 10:05 AM
> To: SCons users mailing list <scons-users at scons.org>
> Subject: Re: [Scons-users] building Java classes from two directories
>
> Notes that SCons expands the directories passed to javac as the list of
> files.... so javac A/B becomes javac A/B/**/*.java if I remember my Java
> regex correctly...
>
> V/R,
> William
>
> On Thu, Feb 4, 2016 at 4:03 PM, William Blevins <wblevins001 at gmail.com>
> wrote:
>
>> Rob,
>>
>> If I remember correctly Java sources are handled a bit unintuitively. If
>> you pass in *.java files then I think they are all built together, but if
>> you pass in directories, all the directories are "assumed" to be
>> parallelizable; thus, if you pass in two directories, those directories
>> will appear as separate javac commands.
>>
>> If your code looks like:
>>
>> A/B
>> A/C
>>
>> source = [ A/B, A/C ] yields javac A/B and javac A/C // I don't
>> personally like this behavior
>>
>> source = [ A ] yields javac A
>>
>> source = [ "all java files" ] yields javac F1 F2 ... FN
>>
>> V/R,
>> William
>>
>> On Thu, Feb 4, 2016 at 1:10 AM, Rob Boehne <robb at datalogics.com> wrote:
>>
>>> Scons users,
>>>
>>> I have a Java builder that compiles classes from a few java files that
>>> are hand-written and a slew of SWIG generated java files.  The generated
>>> files depend on the hand-written ones.
>>> Here is a snippet:
>>>
>>>
>>>     def gen_java_source_list(target, source, env, for_signature):
>>>         """If given a directory, simply glob all files in the directory,
>>> otherwise return a list
>>>         of source files.
>>>
>>>         E.g., when JARCHDIR is set, generate something like
>>>         > jar cf foo.jar -C $JARCHDIR .
>>>         otherwise
>>>         > jar cf foo.jar first.class second.class ...
>>>         """
>>>         jarchdir = env.subst('$JARCHDIR')
>>>         if jarchdir:
>>>             return "-C %s ." % (jarchdir,)
>>>         else:
>>>             result = []
>>>             for src in source:
>>>                 contents = src.get_contents()
>>>                 if contents[:16] != "Manifest-Version":
>>>                     result.append(src)
>>>             return result
>>>
>>>     javaenv.Replace(_JARSOURCES=gen_java_source_list)
>>>     classes = javaenv.Java('classes', [javaenv.Dir('#$GENDIR/java'),
>>> javaenv.Dir('$SOURCEPATH.abspath')])
>>>     jar = javaenv.Jar('${JAVAPACKAGE}.jar', classes,
>>> JARCHDIR=javaenv.Dir('classes').path)
>>>
>>> With a much older version of SCons (0.97) and python 2.5.6, the Java
>>> builder builds everything in the two directories, but only passes one
>>> directory in –sourcepath.
>>>
>>> javac -encoding UTF-8 -target 1.5 -source 1.5 -d
>>> build\win-x86-32\Debug\classes -sourcepath gen\pdfl\java
>>> gen\pdfl\java\Action.java gen\pdfl\java\AddPageFlags.java <SNIP out 100 or
>>> so java files in gen\pdfl\java />  gen\pdfl\java\WritingMode.java
>>> gen\pdfl\java\XPSConvertParams.java
>>> Source\Interface\CJavaStreamFileImpl.java Source\Interface\Callback.java
>>> Source\Interface\ConstantName.java Source\Interface\Director.java
>>> Source\Interface\JavaInputNozzle.java
>>> Source\Interface\JavaOutputNozzle.java
>>> Source\Interface\PDFAConvertResult.java
>>> Source\Interface\PDFStreamInputAdapter.java
>>> Source\Interface\com\datalogics\PDFL\LibraryException.java
>>>
>>> This effectively compiles.
>>> Using the same Scons scripts with scons-2.4.1 & Python 2.7.11 (on
>>> Windows 7 with VS2013 here) the ‘javac’ command leaves off the second
>>> directory specified (or rather leaves out the java sources in it) which
>>> results in java compile errors for a package they define.
>>>
>>> Using tempfile c:\users\robb\appdata\local\temp\tmp_0ip_q.lnk for
>>> command line:
>>> javac -encoding UTF-8 -target 1.5 -source 1.5 -d
>>> build\win-x86-32\Debug\classes -sourcepath gen\pdfl\java
>>> gen\pdfl\java\Action.java gen\pdfl\java\AddPageFlags.java  <SNIP out 100 or
>>> so java files in gen\pdfl\java /> gen\pdfl\java\WritingMode.java
>>> gen\pdfl\java\XPSConvertParams.java
>>> javac @c:\users\robb\appdata\local\temp\tmp_0ip_q.lnk
>>> gen\pdfl\java\Action.java:10: package com.datalogics.metadata does not
>>> exist
>>> import java.util.EnumSet;import com.datalogics.metadata.*;
>>>                          ^
>>> gen\pdfl\java\Document.java:10: package com.datalogics.metadata does not
>>> exist
>>> import java.util.EnumSet;import com.datalogics.metadata.*;
>>>                          ^
>>> gen\pdfl\java\PDFDict.java:10: package com.datalogics.metadata does not
>>> exist
>>> import java.util.EnumSet;import com.datalogics.metadata.*;
>>>                          ^
>>> gen\pdfl\java\PDFObject.java:10: package com.datalogics.metadata does
>>> not exist
>>> import java.util.EnumSet;import com.datalogics.metadata.*;
>>>                          ^
>>> <SNIP>
>>>
>>> My reading of the documentation suggests this should work, sources can
>>> be a list of directories as it is here.
>>> Another interesting fact, if I change the order the two directories are
>>> specified in, it generates a command that only includes the sources from
>>> Source/Interface/.
>>>
>>> Does anyone have a suggestion for a workaround or a fix?
>>>
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Scons-users mailing list
>>> Scons-users at scons.org
>>> https://pairlist4.pair.net/mailman/listinfo/scons-users
>>>
>>>
>>
>
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