[jira] [Created] (COMPRESS-399) OSGI package versions are overly pessimistic, except when they're overly optimisic

["Simon Spero (JIRA)" <ji...@apache.org>]

Simon Spero created COMPRESS-399:
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             Summary: OSGI package versions are overly pessimistic, except when they're overly optimisic 
                 Key: COMPRESS-399
                 URL: https://issues.apache.org/jira/browse/COMPRESS-399
             Project: Commons Compress
          Issue Type: Bug
          Components: Build
    Affects Versions: 1.14
            Reporter: Simon Spero
            Priority: Minor
             Fix For: 1.15


The OSGI versions in the current distributions are not being correctly generated.  OSGI relies on package version numbers following semantic version properly for correct resolution.  

Current version numbers have been generated from the maven version. This has lead to new minor version increases for packages that have no API changed; it has also concealed   major (breaking) changes to several packages since 1.0.

I have created two branches that address the issue.
Both add the bundle:baseline goal to the verify phase of the build. 
The also both have packageinfo files added to every package, containing the package version. These are picked up by the bundle manifest generator, and are used if no explicit version is given in the "Export-Package" command. 

Both branches bump the major version number for packages with any minor changes to 2.0.0.  This makes the bundle correct, but does not fix improper import declarations made by users of earlier bundles.   

One branch uses the version number  from the oldest version that has no changes when compared to HEAD, and which has not had any breaking changes since 1.0.0.  This will fail the build because version numbers should be increasing, and may cause issues if an importing bundle uses a range that requires an identical, but higher numbered version of the package

The other branch uses version 1.14.0 for all packages with no major changes. 

A third alternative, which I didn't add, is to just set all packages be version 1.14.0, and just bump major versions when required going forward. The bulk of the major changes happened a good few versions back,  so it's not as bad as it could be. 

If you have a preferred option, I can create a pull request on Github 



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