Re: [tycho-user] [EXTERNAL] Re: Need info about mirroring maven artifact

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Re: [tycho-user] [EXTERNAL] Re: Need info about mirroring maven artifacts in a p2 mirror with Nexus

From: Justin Georgeson <JGeorgeson@xxxxxxx>
Date: Wed, 9 Mar 2016 15:51:05 +0000
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Thread-topic: [tycho-user] [EXTERNAL] Re: Need info about mirroring maven artifacts in a p2 mirror with Nexus


> -----Original Message-----
> From: tycho-user-bounces@xxxxxxxxxxx [mailto:tycho-user-
> bounces@xxxxxxxxxxx] On Behalf Of David M. Karr
> Sent: Wednesday, March 09, 2016 9:05 AM
> To: Tycho user list
> Subject: Re: [tycho-user] [EXTERNAL] Re: Need info about mirroring maven
> artifacts in a p2 mirror with Nexus
> 
> On 03/08/2016 11:36 AM, Justin Georgeson wrote:
> >
> >> -----Original Message-----
> >> From: tycho-user-bounces@xxxxxxxxxxx [mailto:tycho-user-
> >> bounces@xxxxxxxxxxx] On Behalf Of David M. Karr
> >> Sent: Tuesday, March 08, 2016 1:24 PM
> >> To: Tycho user list
> >> Subject: Re: [tycho-user] [EXTERNAL] Re: Need info about mirroring
> >> maven artifacts in a p2 mirror with Nexus
> >>
> >> On 03/08/2016 11:20 AM, Justin Georgeson wrote:
> >>> You could use the maven-dependency-plugin to dynamically pull those
> >> dependencies from a standard M2 repo, and then package them into your
> >> bundle jar with a Bundle-Classpath header to include those extra jar files.
> >> This also requires setting Eclipse-BundleShape header to "dir" in
> >> your manifest so your plugin is extracted into a folder when
> >> installed into a product.
> >>
> >> I've heard of this option before, but I've never fully understood the
> >> details well enough to move forward with it.  Are there existing
> >> simple (but
> >> complete) examples that I can reference for this?
> >
> > Don't know about public examples, but the Bundle-Classpath header is
> > documented here
> >
> > https://urldefense.proofpoint.com/v2/url?u=http-3A__wiki.osgi.org_wiki
> > _Bundle-2DClassPath&d=CwICAg&c=PskvixtEUDK7wuWU-
> tIg6oKuGYBRbrMXk2FZvF0
> >
> UfTo&r=dLxYM3PBhAqFnkH7uKz_OVZL1uyui4QoEmBCjCmEiTk&m=4I8tMYY2
> k40ggyQRL
> > -
> _8ChDDwhTU1CPSSkR9NeONVlE&s=IuB_2BnZ09zY4B_sDxEIhhi4U6U2RXhAP
> Rm5DoTgM
> > wM&e=
> >
> > The dependency plugin I would suggest using the copy goal
> >
> > https://urldefense.proofpoint.com/v2/url?u=https-
> 3A__maven.apache.org_
> > plugins_maven-2Ddependency-2Dplugin_copy-
> 2Dmojo.html&d=CwICAg&c=Pskvix
> > tEUDK7wuWU-
> tIg6oKuGYBRbrMXk2FZvF0UfTo&r=dLxYM3PBhAqFnkH7uKz_OVZL1uyui4
> > QoEmBCjCmEiTk&m=4I8tMYY2k40ggyQRL-
> _8ChDDwhTU1CPSSkR9NeONVlE&s=gQb0B-Wx
> > rhgh7Z0Dob1NxoCpI6f-j_3EY7RNChZhXVw&e=
> > https://urldefense.proofpoint.com/v2/url?u=https-
> 3A__maven.apache.org_
> > plugins_maven-2Ddependency-
> 2Dplugin_usage.html&d=CwICAg&c=PskvixtEUDK7
> > wuWU-
> tIg6oKuGYBRbrMXk2FZvF0UfTo&r=dLxYM3PBhAqFnkH7uKz_OVZL1uyui4QoE
> mBC
> > jCmEiTk&m=4I8tMYY2k40ggyQRL-
> _8ChDDwhTU1CPSSkR9NeONVlE&s=9LrgEVu4vE3zWk
> > OmQRiirzRMmkbmjjNshGzM2rl4hwo&e=
> >
> > Put all the jar files in a folder like "libs", at the root instead of the target
> folder. This is because of how the bin.includes entries in the build.properties
> file are handled. In the bin.includes property you'll need to include the "libs"
> folder. Then in your Manifest you can have something like 'Bundle-Classpath:
> libs/*' and 'Eclipse-Bundle-Shape: dir'.
> 
> In addition to my pending question about the purpose and need for "Eclipse-
> Bundle-Shape", I could use some additional clarification on the need to put
> this "libs" folder outside of the "target" folder. You indicate this  is because of
> how "bin.includes" works, but I'd appreciate a full explanation.

The Eclipse-BundleShape header tells P2 that when it installs the plugin jar into a product, it should expand the contents. You build produces a jar, your software site holds it as a jar, but at runtime (open Eclipse IDE, Help -> Install New Software, install your feature) it will be a folder instead of jar (${ECLIPSE}/plugins/com.example.plugin_1.2.3.4444/ instead of ${ECLIPSE}/plugins/com.example.plugin_1.2.3.4444.jar). 

http://eclipsesource.com/blogs/2009/01/20/tip-eclipse-bundleshape/

In regards to the bin.includes, with the exception of the compiled classes (the '.' in bin.includes) I believe all the other entries are relative to ${project.basedir}. So if you put the jar files in target/libs and added "target/libs" to your bin.includes, your bundle will have "target/libs" instead of "libs". 

> >
> > Your bundle jar should end up with the "libs" folder at the root, and P2 will
> install your bundle as an expanded folder instead of the jar file. It needs to
> be expanded for the jar file(s) in the "libs" folder to be loaded at runtime
> when the bundle is started.
> >
> >>> The Nexus P2 metadata feature is useful if you're doing a 'mvn
> >>> deploy' of
> >> an OSGi compliant bundle or feature jar. It reads the metadata in the
> >> jar files and publishes them to a P2 repo inside the Maven repo. It
> >> doesn't support extra p2.inf requirements though (at least it didn't
> >> in my case), and the bug I field was closed as WONTFIX because that
> >> functionality was only beta and the comment implied a big internal
> >> rewrite that would obviate it. However they wouldn't provide any further
> information.
> >>> To use pomDependencies=consider the dependencies in the Maven
> repo
> >> have to already be OSGi bundle jars. You can have a separate Maven
> >> project which depends on the non-OSGI jar, uses bundle-maven-plugin
> >> to produce an OSGi version, 'mvn deploy' that, and then your
> >> eclipse-plugin project can list the modified version as a standard
> >> maven pom dependency in conjunction with
> pomDependencies=consider.
> >> There is no transitive resolution of these dependencies, and you'll
> >> still have to list the dependency in your manifest too.
> >>>> -----Original Message-----
> >>>> From: tycho-user-bounces@xxxxxxxxxxx [mailto:tycho-user-
> >>>> bounces@xxxxxxxxxxx] On Behalf Of David M. Karr
> >>>> Sent: Tuesday, March 08, 2016 12:49 PM
> >>>> To: Tycho user list
> >>>> Subject: [EXTERNAL] Re: [tycho-user] Need info about mirroring
> >>>> maven artifacts in a p2 mirror with Nexus
> >>>>
> >>>> On 03/08/2016 10:28 AM, Tom Bryan (tombry) wrote:
> >>>>> I don't remember your original use case, but is the problem you're
> >>>>> hitting similar to this user's situation?
> >>>>> https://urldefense.proofpoint.com/v2/url?u=http-
> >>>> 3A__stackoverflow.com_
> >>>>> questions_35346113_using-2Dthird-2Dparty-2Dlibraries-2Din-
> >>>> 2D&d=CwICAg&
> >>>>> c=PskvixtEUDK7wuWU-
> >>>> tIg6oKuGYBRbrMXk2FZvF0UfTo&r=dLxYM3PBhAqFnkH7uKz_OV
> >>>>> ZL1uyui4QoEmBCjCmEiTk&m=5KhxhnQhnyctf3V1EaF89bva189AfbJ-
> >>>> cixX8Rplgy4&s=
> >>>>> lXkou9wjJu-b6MRCwKJbKLpLF0QCXw3WlFT0f-iiuto&e=
> >>>>> eclipse-rcp-tycho-app/
> >>>>> I think that my reply on that thread explains the current state of
> >>>>> affairs and the problem bridging between Eclipse and Tycho on one
> >>>>> hand and normal Maven artifacts and dependencies on the other.
> >>>> I guess my situation is similar to that, yes.
> >>>>
> >>>> The present build just "hard-stores" the jars in the project and
> >>>> references them in the classpath in the manifest. I need to remove
> >>>> them from the project itself and replace them with some sort of
> >>>> declarative dependencies, as I can't store jars in our git repo
> >>>> (it's a project
> >> policy, but I agree with it).
> >>>>> The problem is that even if you could automatically convert a JAR
> >>>>> to an Eclipse plug-in and add it to the Maven repository, you're
> >>>>> still going to have to reference that specific plug-in in your
> >>>>> Eclipse plug-in that uses that library, right?  Are you just
> >>>>> hoping to create some automation that follows the Maven
> dependency
> >>>>> tree for some specific artifact and then creates an equivalent set
> >>>>> of Eclipse "library plug-ins" with the correct transitive
> >>>>> references?  Once you do that, your developers will still need all
> >>>>> of those plug-ins in their local
> >>>> development environments, right?
> >>>>
> >>>> I had assumed that once the jars I need are properly
> >>>> OSGi-configured into the Nexus p2 repo, I can specify that repo in
> >>>> my target platform, along with the dependencies I need, and then my
> >>>> code will be
> >> able to use those classes.
> >>>> Is there anything else I need?
> >>>>
> >>>>> Tycho is great for handling Eclipse bundles, but as soon as you
> >>>>> try to include a complex third party (JAR) library into your RCP
> >>>>> application, you hit this problem.  It would be great if Tycho
> >>>>> users could help articulate what a workable solution would look like.
> >>>>> That way, maybe someone can solve that problem so that we don't
> >>>>> have a bunch of different software teams having to work around
> >>>>> this disconnect between the Maven world and the Eclipse-tycho
> world.
> >>>>>
> >>>>> ---Tom
> >>>>>
> >>>>> On 3/8/16, 12:53 PM, "tycho-user-bounces@xxxxxxxxxxx on behalf of
> >>>>> David
> >>>> M.
> >>>>> Karr" <tycho-user-bounces@xxxxxxxxxxx on behalf of
> >>>>> davidmichaelkarr@xxxxxxxxx> wrote:
> >>>>>
> >>>>>> A while ago, I asked questions in here (and other channels) about
> >>>>>> my Eclipse plugin build, using Tycho, which was "hard-storing"
> >>>>>> some maven artifacts in the project instead of specifying them
> >>>>>> "declaratively".  I tried for quite a while to figure out how to
> >>>>>> specify them as Maven dependencies, but I never got it to work.
> >>>>>>
> >>>>>> I started to understand that the only way to get this to work was
> >>>>>> to be able to access those artifacts in a p2 repository, so I can
> >>>>>> specify those dependencies in my target platform.  The
> >>>>>> administrator of the Nexus server that I use has been working on
> >>>>>> this, but he's telling me that the artifacts mirrored in this
> >>>>>> repository have to be OSGi
> >>>> bundles.
> >>>>>> A "plain" Maven artifact jar won't work.
> >>>>>>
> >>>>>> I'm now understanding that it's straightforward to "augment" an
> >>>>>> existing Maven artifact with the appropriate META-
> INF/MANIFEST.MF
> >>>>>> file to have it be recognized and properly used as an OSGi bundle.
> >>>>>> This can be done at build time with the "maven-bundle-plugin",
> >>>>>> but Nexus also has the ability (I don't know the details yet) to
> >>>>>> semi-automatically add manifest info to artifacts so they can be
> >>>>>> used in a
> >>>> p2 repo.
> >>>>>> However, I'm also hearing that even if the artifact is a valid
> >>>>>> OSGi bundle, it won't properly work in a p2 repo unless it can
> >>>>>> somehow see "features".  What do I have to do to plain Maven
> >>>>>> artifact jars to make them usable in an Eclipse plugin build as
> >>>>>> repository targets in a target platform specification?
> >>>>>>
> >>>>>> _______________________________________________
> >>>>>> tycho-user mailing list
> >>>>>> tycho-user@xxxxxxxxxxx
> >>>>>> To change your delivery options, retrieve your password, or
> >>>>>> unsubscribe
> >>>>> >from this list, visit
> >>>>>> https://urldefense.proofpoint.com/v2/url?u=https-
> 3A__dev.eclipse.
> >>>>>> or
> >>>>>> g_
> >>>>>> mailman_listinfo_tycho-2Duser&d=CwICAg&c=PskvixtEUDK7wuWU-
> >>>> tIg6oKuGYBR
> >>>>
> >>
> brMXk2FZvF0UfTo&r=dLxYM3PBhAqFnkH7uKz_OVZL1uyui4QoEmBCjCmEiTk
> >>>> &m=5Khxh
> >>>>>> nQhnyctf3V1EaF89bva189AfbJ-
> >>>> cixX8Rplgy4&s=ni2u4HPqgrBZTJ7T0YDLFXCOOBsZ
> >>>>>> vWVu6ULTBdsWOeg&e=
> >>>>>>
> >>>>> _______________________________________________
> >>>>> tycho-user mailing list
> >>>>> tycho-user@xxxxxxxxxxx
> >>>>> To change your delivery options, retrieve your password, or
> >>>>> unsubscribe from this list, visit
> >>>>> https://urldefense.proofpoint.com/v2/url?u=https-
> >>>> 3A__dev.eclipse.org_m
> >>>>> ailman_listinfo_tycho-2Duser&d=CwICAg&c=PskvixtEUDK7wuWU-
> >>>> tIg6oKuGYBRbr
> >>>>
> >>
> MXk2FZvF0UfTo&r=dLxYM3PBhAqFnkH7uKz_OVZL1uyui4QoEmBCjCmEiTk&
> >>>> m=5KhxhnQh
> >>>>> nyctf3V1EaF89bva189AfbJ-
> >>>> cixX8Rplgy4&s=ni2u4HPqgrBZTJ7T0YDLFXCOOBsZvWVu
> >>>>> 6ULTBdsWOeg&e=
> >>>> _______________________________________________
> >>>> tycho-user mailing list
> >>>> tycho-user@xxxxxxxxxxx
> >>>> To change your delivery options, retrieve your password, or
> >>>> unsubscribe from this list, visit
> >>>> https://urldefense.proofpoint.com/v2/url?u=https-
> >>>> 3A__dev.eclipse.org_mailman_listinfo_tycho-
> >>>> 2Duser&d=CwICAg&c=PskvixtEUDK7wuWU-
> >>>>
> >>
> tIg6oKuGYBRbrMXk2FZvF0UfTo&r=dLxYM3PBhAqFnkH7uKz_OVZL1uyui4QoE
> >>>> mBCjCmEiTk&m=5KhxhnQhnyctf3V1EaF89bva189AfbJ-
> >>>>
> >>
> cixX8Rplgy4&s=ni2u4HPqgrBZTJ7T0YDLFXCOOBsZvWVu6ULTBdsWOeg&e=
> >>> _______________________________________________
> >>> tycho-user mailing list
> >>> tycho-user@xxxxxxxxxxx
> >>> To change your delivery options, retrieve your password, or
> >>> unsubscribe from this list, visit
> >>> https://urldefense.proofpoint.com/v2/url?u=https-
> >> 3A__dev.eclipse.org_m
> >>> ailman_listinfo_tycho-2Duser&d=CwICAg&c=PskvixtEUDK7wuWU-
> >> tIg6oKuGYBRbr
> >>
> MXk2FZvF0UfTo&r=dLxYM3PBhAqFnkH7uKz_OVZL1uyui4QoEmBCjCmEiTk&
> >> m=MJuWCGW7
> >>> LT6lrT2I3SN1QD4asTdVy-
> >> ZnrfCPp5OnJG0&s=w5vtyzy3eMOAszEoz1mdV4rO6_hU662m
> >>> FjIoDYpWWWY&e=
> >> _______________________________________________
> >> tycho-user mailing list
> >> tycho-user@xxxxxxxxxxx
> >> To change your delivery options, retrieve your password, or
> >> unsubscribe from this list, visit
> >> https://urldefense.proofpoint.com/v2/url?u=https-
> >> 3A__dev.eclipse.org_mailman_listinfo_tycho-
> >> 2Duser&d=CwICAg&c=PskvixtEUDK7wuWU-
> >>
> tIg6oKuGYBRbrMXk2FZvF0UfTo&r=dLxYM3PBhAqFnkH7uKz_OVZL1uyui4QoE
> >> mBCjCmEiTk&m=MJuWCGW7LT6lrT2I3SN1QD4asTdVy-
> >>
> ZnrfCPp5OnJG0&s=w5vtyzy3eMOAszEoz1mdV4rO6_hU662mFjIoDYpWWWY
> >> &e=
> > _______________________________________________
> > tycho-user mailing list
> > tycho-user@xxxxxxxxxxx
> > To change your delivery options, retrieve your password, or
> > unsubscribe from this list, visit
> > https://urldefense.proofpoint.com/v2/url?u=https-
> 3A__dev.eclipse.org_m
> > ailman_listinfo_tycho-2Duser&d=CwICAg&c=PskvixtEUDK7wuWU-
> tIg6oKuGYBRbr
> >
> MXk2FZvF0UfTo&r=dLxYM3PBhAqFnkH7uKz_OVZL1uyui4QoEmBCjCmEiTk&
> m=4I8tMYY2
> > k40ggyQRL-
> _8ChDDwhTU1CPSSkR9NeONVlE&s=igbqvgJ6FWIlM36UrlL5tCha7yrpBhLr
> > cGIFv2fmKIE&e=
> 
> _______________________________________________
> tycho-user mailing list
> tycho-user@xxxxxxxxxxx
> To change your delivery options, retrieve your password, or unsubscribe
> from this list, visit https://urldefense.proofpoint.com/v2/url?u=https-
> 3A__dev.eclipse.org_mailman_listinfo_tycho-
> 2Duser&d=CwICAg&c=PskvixtEUDK7wuWU-
> tIg6oKuGYBRbrMXk2FZvF0UfTo&r=dLxYM3PBhAqFnkH7uKz_OVZL1uyui4QoE
> mBCjCmEiTk&m=4I8tMYY2k40ggyQRL-
> _8ChDDwhTU1CPSSkR9NeONVlE&s=igbqvgJ6FWIlM36UrlL5tCha7yrpBhLrcGI
> Fv2fmKIE&e=

Follow-Ups:
- Re: [tycho-user] [EXTERNAL] Re: Need info about mirroring maven artifacts in a p2 mirror with Nexus
  - From: David M. Karr

References:
- [tycho-user] Need info about mirroring maven artifacts in a p2 mirror with Nexus
  - From: David M. Karr
- Re: [tycho-user] Need info about mirroring maven artifacts in a p2 mirror with Nexus
  - From: Tom Bryan (tombry)
- Re: [tycho-user] Need info about mirroring maven artifacts in a p2 mirror with Nexus
  - From: David M. Karr
- Re: [tycho-user] [EXTERNAL] Re: Need info about mirroring maven artifacts in a p2 mirror with Nexus
  - From: Justin Georgeson
- Re: [tycho-user] [EXTERNAL] Re: Need info about mirroring maven artifacts in a p2 mirror with Nexus
  - From: David M. Karr
- Re: [tycho-user] [EXTERNAL] Re: Need info about mirroring maven artifacts in a p2 mirror with Nexus
  - From: Justin Georgeson
- Re: [tycho-user] [EXTERNAL] Re: Need info about mirroring maven artifacts in a p2 mirror with Nexus
  - From: David M. Karr

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