Tycho

The Tycho package manager for Maven projects.

Description

A package manager implementation supporting Maven projects using Tycho.

This implementation uses the following strategy to obtain the dependency graph and construct Package objects with metadata:

Start a Maven build on the analyzed project using the Maven Embedder library with the goals "package" and "dependency:tree". (The "package" goal is required to activate the Tycho extension.) The dependency plugin is configured to write the dependency tree information in JSON format to a file; from there it can be read in a convenient way.

Resolving of dependencies that are OSGi artifacts hosted in P2 repositories requires a special treatment, since Maven does not natively support this repository layout. The class obtains the P2 repositories referenced from the build from the projects encountered during the build and the Tycho target platform definition. Each P2 repository has a file listing the artifacts it contains with some metadata. By reading these files and aggregating the information, the implementation can match the bundle identifiers of OSGi dependencies to the repositories where they can be found and thus create correct RemoteArtifact objects.