Add basic OSGi metadata to the uber-jar

[laeubi]

Currently the uber-jar is a plain jar and therefore needs to be either wrapped or embedded when using inside OSGi.

This now adds very basic OSGi meta-data so it can be used inside OSGi, possible use-cases are:

• fetch it bundle location and start lemminx as a CLI process
• create fragments of the host that export packages, import additional packages or provide extensions
• create a fragment that provides a Declarative-Service-Component to provide services to other parts of the system
• ...

@mickaelistria this should make it possible to extract it from WWD as a very first basic step.

[mickaelistria]

Can you please show what the generated MANIFEST looks like?

[laeubi]

The manifest looks like this:

Manifest-Version: 1.0
Bundle-SymbolicName: org.eclipse.lemminx.uber-jar
Bundle-Name: lemminx uber jar bundle
Bundle-Version: 0.28.1.SNAPSHOT
Bundle-ActivationPolicy: lazy
Bundle-ManifestVersion: 2
Bundle-Vendor: Eclipse.org
Service-Component: OSGI-INF/*.xml
Build-Jdk-Spec: 1.8
Created-By: Maven Archiver 3.6.0
Main-Class: org.eclipse.lemminx.XMLServerLauncher

one could of course also check out this PR and see the final result, I also installed the bundle in my m2e dev eclipse and at least it shows up as

444	ACTIVE      org.eclipse.lemminx.uber-jar_0.28.1.SNAPSHOT
g! bundle 444
Module               osgi.identity; type="osgi.bundle"; version:Version="0.28.1.SNAPSHOT"; osgi.identity="org.eclipse.lemminx.uber-jar" [id=444]
Location             file:/.../org.eclipse.lemminx/target/org.eclipse.lemminx-uber.jar
State                32
Bundle                 444|Active     |    1|org.eclipse.lemminx.uber-jar (0.28.1.SNAPSHOT)
LastModified         1732434332385
Version              0.28.1.SNAPSHOT
RegisteredServices   null
Headers               Build-Jdk-Spec = 1.8
 Bundle-ActivationPolicy = lazy
 Bundle-ManifestVersion = 2
 Bundle-Name = lemminx uber jar bundle
 Bundle-SymbolicName = org.eclipse.lemminx.uber-jar
 Bundle-Vendor = Eclipse.org
 Bundle-Version = 0.28.1.SNAPSHOT
 Created-By = Maven Archiver 3.6.0
 Main-Class = org.eclipse.lemminx.XMLServerLauncher
 Manifest-Version = 1.0
 Service-Component = OSGI-INF/*.xml


ServicesInUse        null
BundleContext        org.eclipse.osgi.internal.framework.BundleContextImpl@e18d867
SymbolicName         org.eclipse.lemminx.uber-jar
BundleId             444

[mickaelistria]

Thanks!