Difference between revisions of "Tycho/Nexus Unzip Plugin"

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Again due to a limitation of the configuration web UI, you currently have to manually edit <tt>${NEXUS_WORK}/conf/nexus.xml</tt>.  
 
Again due to a limitation of the configuration web UI, you currently have to manually edit <tt>${NEXUS_WORK}/conf/nexus.xml</tt>.  
To enable virtual SNAPSHOT versions, configure '''useVirtualVersion=true''' in <tt>${NEXUS_WORK}/conf/nexus.xml</tt> and restart nexus. For example:
+
To enable virtual SNAPSHOT version expansion, configure '''useVirtualVersion=true''' in <tt>${NEXUS_WORK}/conf/nexus.xml</tt> and restart nexus. For example:
  
 
<pre>&lt;repository&gt;
 
<pre>&lt;repository&gt;

Revision as of 06:35, 21 February 2013

WARNING - EARLY DRAFT: this plugin is not released yet and docs are in early draft and probably not complete/ buggy. If you want to try it, you will need to build the plugin yourself from source.


Contents

Nexus Unzip Repository

What is it ?

The Unzip Repository is a nexus plugin which enables binary p2 artifact exchange between tycho projects.

How does it work ?

  1. The first tycho project ("producer") deploys a (zipped) p2 repository to nexus. It does this by simply using mvn deploy on a maven project with packaging type eclipse-repository
  2. The second tycho project ("consumer") uses the p2 repository deployed by "producer". This is done using a special "unzip" URL providing an "unzipped view" on the zipped p2 repository

Implementation Details

The Unzip Repository is a new Nexus repository type that shadows the build results of a standard Maven 2 repository and allows to browse into zip and jar artifacts.

Example:

  • p2 repo zip as artifact in Maven 2 Repository:
    http://<NEXUS_HOST>/nexus/content/repositories/public/org/example/demo/org.example.demo.repository/0.1.0/org.example.demo.repository-0.1.0.zip
  • Same artifact viewed as unzipped p2 repository using a virtual unzip repo named public.unzip:
    http://<NEXUS_HOST>/nexus/content/repositories/public.unzip/org/example/demo/org.example.demo.repository/0.1.0/org.example.demo.repository-0.1.0.zip-unzip


Installation and Configuration

Prerequisites

The Nexus Unzip Repository Plugin requires Nexus OSS >= 2.3.0 installed

Download

Get the nexus unzip plugin from TODO maven central URL.

Deploying the plug-in

To enable a Nexus server to provide direct access to files inside zip/jar archives, you need to deploy the Nexus Unzip Repository Plugin to the Nexus server instance and configure a new virtual repository using the Unzip Repository type.

  1. Stop the Nexus instance
  2. Unzip the unzip-repository-plugin-<VERSION>-bundle.zip into ${NEXUS_WORK}/plugin-repository/ folder
  3. Restart the Nexus server
  4. To verify that the Unzip Repository Plugin is activated, open the Plugin Console from the Administration sub-menu of the Nexus UI

Configuring an unzip repository (using hosted/proxy/virtual repo as master)

WARNING: Using the Nexus Web UI you can only assign hosted, proxy and virtual repositories as the master repository. To configure a group as the used master , you need to configure it directly in the configuration file on the Nexus host machine. Details in the section below.

  1. Open the Nexus Web UI
  2. Login with your administrative user
  3. Choose the Repositories View from the side menu
  4. Open the Add menu and choose Virtual Repository. The detail view below the repository list opens a form to specify further repository configuration.
  5. Enter a unique repository ID and choose a (display) name
  6. Choose Unzip Repository Template as the repository provider
  7. Select the intended repository from the list of the source nexus repositories (see below if you want to configure a group as source repository)
  8. Save the repository config
  9. To verify the setup of the unzip repository, you can now select the repository from the repository list and start browsing the folders and into archives that you have deployed into the previously selected master repository. You can also open the URL given in the Repository Path column to browse in the standard web browser.

Configuring a group as master for the unzip repository

All groups and repositories configuration are stored in the nexus.xml config file in the Nexus work folder. Due to a limitation of the configuration web UI, you currently have to edit this file directly in a text editor in order to configure a group repository as master.

  1. Stop Nexus
  2. Open ${NEXUS_WORK}/conf/nexus.xml
  3. Add a new repository element with following structure
<repository>
      <id>master.group.unzip</id>
      <name>Group Unzip</name>
      <providerRole>org.eclipse.tycho.nexus.internal.plugin.UnzipRepository</providerRole>
      <providerHint>org.eclipse.tycho.nexus.plugin.DefaultUnzipRepository</providerHint>
      <localStatus>IN_SERVICE</localStatus>
      <notFoundCacheActive>true</notFoundCacheActive>
      <notFoundCacheTTL>15</notFoundCacheTTL>
      <userManaged>true</userManaged>
      <exposed>true</exposed>
      <browseable>true</browseable>
      <writePolicy>READ_ONLY</writePolicy>
      <searchable>true</searchable>
      <localStorage>
        <provider>file</provider>
      </localStorage>
      <externalConfiguration>
        <masterRepositoryId>public</masterRepositoryId>
        <useVirtualVersion>true</useVirtualVersion>
        <synchronizeAtStartup>false</synchronizeAtStartup>
      </externalConfiguration>
    </repository>

Note that you specify the repository id (not the name) of the group in the masterRepositoryId element.
4. Restart Nexus

Enabling virtual versions SNAPSHOT and RELEASE

Especially for SNAPSHOT versions, it's generally useful to be able to reference the latest SNAPSHOT version of a p2 repository like


http://<NEXUS_HOST>/nexus/content/repositories/public.unzip/org/example/demo/org.example.demo.repository/0.1.0-SNAPSHOT/org.example.demo.repository-0.1.0-SNAPSHOT.zip-unzip

(without having to specify the actual timestamp of the latest SNAPSHOT).

Again due to a limitation of the configuration web UI, you currently have to manually edit ${NEXUS_WORK}/conf/nexus.xml. To enable virtual SNAPSHOT version expansion, configure useVirtualVersion=true in ${NEXUS_WORK}/conf/nexus.xml and restart nexus. For example:

<repository>
      <id>master.group.unzip</id>
      <name>Group Unzip</name>
      <providerRole>org.eclipse.tycho.nexus.internal.plugin.UnzipRepository</providerRole>
      <providerHint>org.eclipse.tycho.nexus.plugin.DefaultUnzipRepository</providerHint>
      <localStatus>IN_SERVICE</localStatus>
      <notFoundCacheActive>true</notFoundCacheActive>
      <notFoundCacheTTL>15</notFoundCacheTTL>
      <userManaged>true</userManaged>
      <exposed>true</exposed>
      <browseable>true</browseable>
      <writePolicy>READ_ONLY</writePolicy>
      <searchable>true</searchable>
      <localStorage>
        <provider>file</provider>
      </localStorage>
      <externalConfiguration>
        <masterRepositoryId>public</masterRepositoryId>
        <useVirtualVersion>true</useVirtualVersion>
        <synchronizeAtStartup>false</synchronizeAtStartup>
      </externalConfiguration>
    </repository>