Bug 175004

Description Christian Damus 2007-02-21 13:43:32 EST

Found in Eclipse Platform 3.3 M5 build.

According to the Eclipse Versioning Guidelines:

   http://wiki.eclipse.org/index.php/Version_Numbering#Versioning_features

Eclipse recommends that a feature's dependencies should only be expressed at the plug-in/bundle level (indicating the plug-ins/bundles that it requires) rather than as dependencies on other features.  This makes sense, as a feature should not be concerned with how the bundles it requires are packaged and delivered to a consumer.

However, the Update Manager UI does not currently support this recommendation:  the "Select Required" button only finds features that are referenced as dependencies.  It should also find features that provide the plug-ins/bundles that a selected feature requires.

Steps to reproduce:

1. Download and install Eclipse 3.3 M5.
2. Select "Help -> Software Updates -> Find and Install...".
3. Add a new Remote Update Site on the following URL:

    http://download.eclipse.org/releases/europa/staging

4. Press "Finish".
5. In the next dialog, expand the "Models and Model Development" category.
6. Select the "Eclipse Modeling Framework Data Integrity Frameworks
   End-User Features" item.
7. Observe the error message about a required plug-in.
8. Press the "Select Required" button.
9. Observe that nothing changes (no additional selections are made).
10. Select the "Eclipse Modeling Framework (EMF)" and "Object Constraint
    Language (OCL) 2.0 End-User Features".
11. Observe that the error message disappears and the "Next" button is
    enabled.

So, the Update Manager knows when the dependencies of a feature are satisfied.  The "Select Required" button should be able to do this automatically.