Apache Sling Feature Model - Unpack Extension

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  1. a16aa5c [maven-release-plugin] prepare for next development iteration by David Bosschaert · 4 months ago master
  2. f74743f [maven-release-plugin] prepare release org.apache.sling.feature.extension.unpack-0.1.0 by David Bosschaert · 4 months ago org.apache.sling.feature.extension.unpack-0.1.0
  3. 5483a63 Update dependencies to latest version by David Bosschaert · 4 months ago
  4. faaa1c0 SLING-9670: update the Readme by Karl Pauls · 5 months ago
  5. a53f17e SLING-9670: make the extension optional in case of the converter by Karl Pauls · 5 months ago

Apache Sling Featuremodel - Unpack Extension

This module provides support for a generic “unzip” extension for the feature model. It allows you to have feature model artifact extensions unzipped to the file system.

The jar can be used in the following ways:

Feature model launcher extension

When added to the classpath of the feature launcher it will unzip extensions according to a framework property (see below).

OSGi installer extension

When installed as a bundle into sling, it will act as a extension to the OSGi installer and handle zip files that get installed as well as extensions in feature models that get installed (both, again, according to a framework property).


When invoked on the commandline, there is a converter main class that can be used to wrap a list of urls into a feature with an extension.

It looks like this:

java -cp ${HOME}/.m2/repository/org/apache/sling/org.apache.sling.commons.johnzon/1.2.2/org.apache.sling.commons.johnzon-1.2.2.jar:${HOME}/.m2/repository/org/apache/sling/org.apache.sling.feature/1.2.6/org.apache.sling.feature-1.2.6.jar:target/org.apache.sling.feature.extension.unpack-0.1.0-SNAPSHOT.jar \
 org.apache.sling.feature.extension.unpack.impl.converter.Converter \
 <mvn-id-of-resulting-feature> \
 <name-of-extension-in-feature> \
 <path-to-resulting-feature-file> \
 <path-to-mvn-repository-to-store-artifacts> \
 key=<optional-key-for-manifest> \
 <space separated list of urls>

Alternatively, there is an assembly provided.


The framework property org.apache.sling.feature.unpack.extensions can be used to give an OSGi header clause configuring which extensions to unzip, to which dir, and with what required manifest header.

It looks like this: