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Re: [equinox-dev] Fw: [Bug 214801] [api tools] consider Export-Package as API

PDE is planning to add support to flag missing version numbers on package 
exports (https://bugs.eclipse.org/bugs/show_bug.cgi?id=205198). The bug 
report suggest the default severity for a missing package version should 
be "ignore", but I would suggest to start it at "warning", and add a quick 
fix to set the initial version to match the current bundle version (if we 
agree that the initial package version should be the initial bundle 
version).

API tooling will aim to add support to detect invalid version numbers on 
package exports as content of a package changes - similar to the support 
API tooling will provide for bundle version number validation.

Darin Wright




Thomas Watson <tjwatson@xxxxxxxxxx> 
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01/11/2008 04:24 PM
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Re: [equinox-dev] Fw: [Bug 214801] [api tools]  consider Export-Package as 
API






I agree that tooling is needed in order to make this somewhat feasable.

On the OSGi mailing list there was a question posted about using EMF on 
another framework implementation. One of the issues was that EMF uses 
Require-Bundle on org.eclipse.core.runtime. This ends up pulling in lots 
of dependencies, one of which is org.eclipse.osgi. This makes it 
impossible to use EMF on another Framework impl. If EMF instead used 
Import-Package to get its packages then it is conceivable that EMF could 
have its dependancies resolved in another Framework impl. But using 
Import-Package for the eclipse packages without versions is dangerous 
because you do not know what you will get.

Eclipse team rarely uses Import-Package, this maybe because it is a bit 
harder. But for now I would advise against it because it is dangerous 
without versions. Until versions are established EMF should *not* move to 
Import-Package IMO.

Tom



John Arthorne ---01/11/2008 03:27:00 PM---I don't think we can even 
contemplate this without full tooling automation. As Tom says, we struggle 
to keep our bundle version


From:

John Arthorne <John_Arthorne@xxxxxxxxxx>

To:

Equinox development mailing list <equinox-dev@xxxxxxxxxxx>

Date:

01/11/2008 03:27 PM

Subject:

Re: [equinox-dev] Fw: [Bug 214801] [api tools] consider Export-Package as 
API




I don't think we can even contemplate this without full tooling 
automation. As Tom says, we struggle to keep our bundle version numbers 
correct as it is. We can maintain package versions manually up to a point, 
such as base framework packages and service packages, but any wider scope 
would become unmanageable. For most of the wider Eclipse team that 
rarely/never uses import package, there is no immediate need to version at 
the package level. 


Thomas Watson <tjwatson@xxxxxxxxxx> 
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01/11/2008 03:45 PM 


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Re: [equinox-dev] Fw: [Bug 214801] [api tools] consider Export-Package as 
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Without tooling this will be difficult. If we wanted to use the big hammer 
approach the we would have the API tooling (or plain old PDE) mark exports 
without versions as a warning/error by default or update each project 
settings in eclipse to make it an error. Now the question is what version 
would all the well established packages use? Most eclipse packages do not 
specify a version which means they have been using the default version of 
0.0.0. If a package is being versioned for the first time what should its 
version be?

- Start off using 1.0.0
- Use the Bundle-Version

I favor using the Bundle-Version for well established packages because if 
we decide to add versions to the maintenance streams then we have room to 
downgrade the versions as appropriate. Completely new packages in a 
release should start off with version 1.0.

I have been trying to version the exports of org.eclipse.osgi for the past 
few releases. It is hard to keep track of without tooling. Just look at 
how many times we forget to increment the bundle versions in Eclipse and 
that is just one version number per bundle to maintain. Now we will have 
to maintain each package version individually which is a much bigger task. 
Hopefully more advanced API tooling could detect that the API package has 
changed since last release and needs to be incremented. Does the new API 
tooling currently do something like this for Bundle-Version? 

Tom



Jeff McAffer ---01/11/2008 02:17:11 PM---Tom raises a good point that we 
keep letting slide. Are we going to ensure that all export package 
statements have version num 

From: 

Jeff McAffer <Jeff_McAffer@xxxxxxxxxx> 

To: 

equinox-dev@xxxxxxxxxxx 

Date: 

01/11/2008 02:17 PM 

Subject: 

[equinox-dev] Fw: [Bug 214801] [api tools] consider Export-Package as API





Tom raises a good point that we keep letting slide. Are we going to ensure 
that all export package statements have version numbers for 3.4? If we 
have API tooling for this then it would likely be reasonable to start 
doing. Even without tooling today, we could introduce version numbers 
based on the bundle version number for this release and then evolve from 
there (with tooling that will come in the future). 

Jeff 

----- Forwarded by Jeff McAffer/Ottawa/IBM on 01/11/2008 01:22 PM ----- 
bugzilla-daemon@xxxxxxxxxxx 
01/11/2008 10:50 AM 


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Subject
[Bug 214801] [api tools] consider Export-Package as API











https://bugs.eclipse.org/bugs/show_bug.cgi?id=214801 
Product/Component: PDE / Incubators




--- Comment #2 from Thomas Watson <tjwatson@xxxxxxxxxx>  2008-01-11 
10:50:13 -0400 ---
I agree with the concept.  All exported packages which are not marked
x-internal:=true should be versioned.  Without this it makes using
Import-Package very limiting because you cannot specify what version of 
the
package you require.  Packages marked as x-friends are questionable, but I 
can
see friend bundles depending on a particular friend package version.


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