[tycho-user] Optional included features

[Владимир Большуткин <enargit@xxxxxxxxx>]

Hello,

I use Tycho in my open-source project Octclipse. I encountered a situation that I cannot process with Tycho.

The project needs some native code built for the specific OS/arch and for the specific Octave version. I decided to have separate features for each Octave version and separate fragments for each supported OS/arch combination. Each fragment requires specific native libraries (built by Maven NAR plugin on separate virtual machines). This approach works well when I have ALL native libraries built and stored in some Maven repository and want to build the whole release package with everything inside. 

But if I change something in native code and want to test this change, I cannot build the product with only one feature (for the current development environment: current Octave version and OS/arch). 

For instance, I have compiled native code for Octave 3.6.0 and want to build a product with the corresponding to test if it works. I tried exclude unnecesary modules using Maven profiles 

   <profile>

  <id>octave_3_6_0</id>

  <modules>

  <module>net.sf.octclipse.octave_3_6_0</module>

  </modules>

  </profile>

  <profile>

  <id>octave_3_4_3</id>

  <modules>

  <module>net.sf.octclipse.octave_3_4_3</module>

  </modules>

  </profile>

and setting features optional in the parent feature

net.sf.octclipse.platform.feature/feature.xml:

   <includes id="net.sf.octclipse.octave_3_6_0.feature" optional="true" version="0.0.0"/>

   <includes id="net.sf.octclipse.octave_3_4_3.feature" optional="true" version="0.0.0"/>

In this case build process passes first dependency resolution but fails on module net.sf.octclipse.platform.feature with message:

[ERROR] Failed to execute goal org.eclipse.tycho:tycho-packaging-plugin:0.17.0-SNAPSHOT:package-feature (default-package-feature) on project net.sf.octclipse.platform.feature: Execution default-package-feature of goal org.eclipse.tycho:tycho-packaging-plugin:0.17.0-SNAPSHOT:package-feature failed: Could not resolve feature net.sf.octclipse.octave_3_4_3.feature_0.0.0; Path to dependency: -> [Help 1]

Is this an expected behavior or a bug?

If it is correct, is there a way to perform build-time selection of features to be included in a product?

Best regards,

Vladimir.