Re: [m2e-dev] build-before-launch ? background m2e task ?

[Igor Fedorenko <igor@xxxxxxxxxxxxxx>]

On 11-10-17 3:13 PM, Andrei Pozolotin wrote:
> Igor:
>
> 1) to solve "build-before-launch" I implemented a plugin, which
> provides custom java launch configuration contribution, so it runs
> m2e goals before actual java app launch; it sort of works; but:
>
> question:
>
> 2) how can I get appropriate m2e / plexus scanner instance so I run
> these pre-launch m2e goals only when there are really project
> changes? scanner instance I was able to get based on what I see in
> m2e source code is somehow not incremental, it returns whole project
> file set every time I run it :-)

Resource deltas are available to project builders and m2e build
participants. If your code runs as part of
AbstractBuildParticipant.build method, this.getBuildContext().newScanner
and this.getDelta both provide access to resources changed since last build.

I do not believe there is an easy way to determine resources changes
between invocations of pre-launch hooks.

> 3) or may be there are easier ways to detect if there is a need to
> run m2e?

Is this a trick question? ;-)

> Thank you,
>
> Andrei

--
Regards,
Igor