| [tycho-user] Negative requirements: How to include mutually exclusive features in same update site |
Hi, I have a Tycho build containing two features org.example.foo and org.example.bar, which both use a p2.inf to state a *negative* requirement [1] on the opposite feature: org.example.foo/p2.inf: > requires.0.namespace = org.eclipse.equinox.p2.iu > requires.0.name = org.example.bar.feature.group > requires.0.min = 0 > requires.0.max = 0 org.example.bar/p2.inf: > requires.0.namespace = org.eclipse.equinox.p2.iu > requires.0.name = org.example.foo.feature.group > requires.0.min = 0 > requires.0.max = 0 This is meant to prevent these two features from being installed together. Unfortunately, it also prevents Tycho from building an eclipse-repository containing both features: > [ERROR] Cannot resolve project dependencies: > [ERROR] Software being installed: updates raw:1.0.0.'SNAPSHOT'/format(n[.n=0;[.n=0;[-S]]]):1.0.0-SNAPSHOT > [ERROR] Cannot satisfy dependency: org.example.foo.feature.group 1.0.0.qualifier depends on: org.example.bar.feature.group 0.0.0 > [ERROR] Cannot satisfy dependency: updates raw:1.0.0.'SNAPSHOT'/format(n[.n=0;[.n=0;[-S]]]):1.0.0-SNAPSHOT depends on: org.example.foo.feature.group 0.0.0 > [ERROR] Cannot satisfy dependency: updates raw:1.0.0.'SNAPSHOT'/format(n[.n=0;[.n=0;[-S]]]):1.0.0-SNAPSHOT depends on: org.example.bar.feature.group 0.0.0 For me, this defeats the purpose of the negative requirements: I want to offer the user both features Foo and Bar on the same update site, but prevent that he installs both. Is this possible? Andreas [1] <https://wiki.eclipse.org/Equinox/p2/Customizing_Metadata#Capability_Advice:> -- Codetrails GmbH The best code possible Robert-Bosch-Str. 7, 64293 Darmstadt Phone: +49-6151-276-7092 Mobile: +49-170-811-3791 http://www.codetrails.com/ Managing Director: Dr. Marcel Bruch Handelsregister: Darmstadt HRB 91940
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