On Tue, Aug 20, 2013 at 7:00 AM, Ed Willink <[email protected]> wrote:

>
> While checking why a rebuild refreshed a JAR file, I discovered that an
> about.mappings file gets rewritten during a build to contain the build-id.
> This was perhaps useful 5 years ago. Has it gone obsolete? Is it used
> anywhere?
>

about.mappings in a branding plugin contains the build id (and any other
parameterizations) that are applied in the  about.properties file.  ex,
org.eclipse.rcp/about.properties contains lines:
blurb=Eclipse RCP\n\
\n\
Version: {featureVersion}\n\
Build id: {0}\n\
...

If you don't have any parameterizations in your about.properties, you don't
need the about.mappings.

In the Eclipse SDK, we still use it, and so every build must generate a new
jar with a new qualifier [1]

Later,
PW

[1]
http://git.eclipse.org/c/platform/eclipse.platform.releng.git/tree/bundles/org.eclipse.rcp/pom.xml#n31
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