[Scons-users] Jar builds fail with SConscript variant directory

[William Roberts]

Thanks dirk. I will do that then.
On May 3, 2014 2:39 PM, "Dirk Bächle" <tshortik at gmx.de> wrote:


> Hi Bill,

>

> On 01.05.2014 17:52, William Roberts wrote:

>

>> Ok trying again on the right list with the attachment...

>>

>> I typically set up my builds with a hierachical layout and a variant

>> directory and do some other things to make it all work together.

>> Normally I program in C, and this all works.

>>

>> Recently, I tried using java and broke. I have a very simple example

>> that doesnt work. If I change the SConscript calls to use a variant

>> dir, its broken, if I dont it works...

>>

>> Sconstruct:

>>

>>       <snip>

>>          SConscript(script)

>>          #SConscript(script, variant_dir=outdir, duplicate=1)

>>       <snip>

>>

>> to

>>       <snip>

>>          #SConscript(script)

>>          SConscript(script, variant_dir=outdir, duplicate=1)

>>       <snip>

>>

>> it breaks...

>>

>> Can someone explain what's going on here? Thanks.

>>

>

> I also tried my luck and had a short look at your build setup. In your

> SConscript you have:

>

>   Java("classes", ".")

>   Jar("myjar.jar", "classes")

>

> which works fine as long as you don't use variant dirs. The problem is the

> first line, which creates a dependency between "classes" and ".". These are

> both Dir nodes, so when the VariantDir stuff jumps in and starts to copy

> things, it won't pick up the "*.java" source files living *under* the "."

> directory. You can check this with calling "scons --tree=derived", which

> won't show any "*.java" files as leaves in the dependency tree, as one

> might expect.

>

> A possible way out is to compile the Java files one at a time. This

> requires to additionally set the "-classpath" option, and a proper

> SConscript for your situation would be:

>

>   Java("classes", Glob("*.java"), JAVACLASSPATH=Dir("classes"))

>   Jar("myjar.jar", "classes")

>

> This works for duplicate=1, as well as duplicate=0.

>

> Best regards,

>

> Dirk

>

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