[oe] Splitting meta-oe?

[Otavio Salvador]

On Thu, Feb 22, 2018 at 6:27 AM, Patrick Ohly <patrick.ohly at intel.com> wrote:
> On Thu, 2018-02-22 at 07:53 +0100, Jonas Bonn wrote:
>> On 21 February 2018 at 15:09, Martin Hundebøll <mnhu at prevas.dk>
>> wrote:
>>
>> > Now that the discussion branched out a bit...
>> >
>> > We would like better support for this too. Our setup uses a
>> > "manifest"
>> > repository with git submodules to setup the layers:
>> >
>> > > yocto/
>> > >       meta-poky/
>> > >       meta-qt5/
>> > >       meta-foo/
>> > >       meta-bar/
>> > >       conf/
>> > >            bblayers.conf
>> > >            local.conf
>> > >       .gitmodules
>> >
>> > With this setup, customers simply need to clone our yocto repo
>> > recursively, run `yocto/meta-poky/oe-init-build-env yocto` and then
>> > `bitbake image-recipe`.
>> >
>> > But this is rather inflexible, as it requires the "yocto" folder to
>> > be the
>> > build folder to activate the config files...
>> >
>> > We looked into putting the configs in "meta-foo/conf/*.conf.sample"
>> > and
>> > using TEMPLATECONF, but the "oe-init-build-env" script is rather
>> > picky
>> > about poky being the "top" directory.
>> >
>> > I guess the oe-init-build-env script can be changed to look for
>> > .templateconf in any parent folder?
>>
>>
>> Putting together a deliverable setup that's easy for the customer to
>> get
>> started with is a bit tricky.  Here's the approach that's worked well
>> for
>> me:
>>
>> /myproject
>>     /env        <-- script
>>     /build
>>     /meta-myproject
>>     /bitbake
>>     /oe-core
>>     /meta-layer1
>>     /meta-layer2
>>
>> env, build, meta-myproject are part of the myproject repo, everything
>> else is a submodule.
>
> refkit used the same approach. One thing that I would prefer to do
> differently is the location of the submodule: having them in their own
> directory would make it more transparent which code is "external" and
> which is "internal".
>
>> "env" is a script containing just the following:
>> . ./oe-core/oe-init-build-env build/ bitbake/
>
> We ended up with a top-level "oe-init-build-env" wrapper script around
> the actual oe-core/oe-init-build-env. That way the repo could be used
> the same way as poky. The script sets TEMPLATECONF, so the usual local
> build setup happens based on refkit sample files.

We have a script set and a document which describes how we do it:

http://doc.ossystems.com.br/managing-platforms.html

The script sources can be seen at:

https://code.ossystems.com.br/gitweb?p=ossystems-yocto-base-scripts.git

-- 
Otavio Salvador                             O.S. Systems
http://www.ossystems.com.br        http://code.ossystems.com.br
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