JDK8 Preliminary Repository Layout

[David Holmes]

Kelly O'Hair said the following on 03/11/11 09:00:
> On Mar 10, 2011, at 2:50 PM, David Holmes wrote:
> 
>> Lana Steuck said the following on 03/11/11 07:03:
>>> On 03/10/2011 08:46 AM, Kelly O'Hair wrote:
>>>> Interesting point, we will need to decide which projects need jdk8 forests. I imagine some will not, and we may be
>>>> doing a little trimming down on the number of team forests.
>>> Makes sense. There are some team forests (at least one that I know of) that are not being used, so we can look into removing those and maybe combining those team forests which have more interdependencies into one forest (provided that the team members agree).
>> I've never been a fan of the "all projects are complete forests". It just increases the conceptual complexity of the repositories and the workload of keeping all the forests sync'ed up. It should be easy to add additional repositories to a project as the need arises, without requiring all repositories.
>>
> 
> But all too often, regressions in one part of the forest only manifest themselves when building the entire forest.
> So it is the responsibility of the Developer and Integrator to insure the entire forest builds and works prior
> to integrations into the 'master' (jdk7/jdk7) forest.
> Integrators are required to sync up with master, test build, and integrate the entire forest, not partials.

Developers (other than those working on the build system) rarely build 
forests. Hotspot engineers build hotspot, T&L engineers build jdk etc. 
The team integrators certainly have to combine with the "master" forest 
at the next level. But keeping a bunch of unmodified team repos up to 
date with the "master" is just pure overhead.

Maybe hotspot needs a full forest (I don't think so), but certainly 
hotspot_rt, hotspot_comp and hotspot_gc do not, in my opinion.

> By having that full forest available for the team, you can at least be sure that anyone on the team doing full
> forest builds is dealing with the same sources.
> Developers can choose to only use partials, that is certainly always possible.

If a team operates in such a way that full forest builds are needed then 
the team will use a full forest. Most of the teams do not need that. 
Having the forest just creates work for the gatekeeper.

I said all this when the forest of forests was first devised. As I said 
never been a fan, don't see the need for it.

Cheers,
David

> -kto
>