- Documentation (2.5.0-rc1)
- Release Notes
- Settings Files
- Ivy Files
- Ant Tasks
- post resolve tasks
- Using standalone
- Developer doc
Apache Felix Sigil
Another initiative to manage OSGi™ dependencies is the project Apache Felix Sigil™. Sigil can also be used together with Ivy. We will try to explain here the different approach taken there compared to the built-in OSGi capabilities of Ivy.
A different approach
Apache Felix Sigil is at its core about managing OSGi dependencies, not directly related to Ivy. Most of its core feature is about the implementation of the not yet released OBR (OSGi Bundle Repository) specification. It then provides integration layers with several tools so that developers can use the OBR API. It provides an Eclipse plugin and there are the Ant/Ivy tasks and resolvers.
The built-in OSGi resolver is obviously using the Ivy engine to do the resolution of the dependencies. The OSGi capability of Ivy is mainly implemented with a module descriptor parser which understands the OSGi metadata of a
On the other hand, Sigil is using a separate "engine" to do the resolution, the OBR, an engine which is dedicated to understand the OSGi metadata and their semantics.
The immediate consequence of this difference is that the built-in resolver is probably less accurate than the Sigil one when it comes to understanding the OSGi dependencies semantics. As explained in this page, the OSGi model doesn’t fit well into the Ivy one.
Source of metadata
Apache Felix Sigil has its own format for specifying the OSGi dependencies. Whereas Ivy requires an
ivysettings.xml and an
ivy.xml, Sigil requires a
sigil-repos.properties and a
sigil.properties. Then if you want to use the Sigil resolver in Ivy, you will need 4 files, the 2 Ivy ones and the 2 Sigil ones, as described in the Sigil quickstart here.
To support OSGi directly in Ivy, you just need to add an extra namespace in the
ivy.xml, and in the
ivysettings.xml just declare the proper resolver and latest revision strategy.