[OE-core] Deployment for machine X will remove its results from machine Y's deploy dir

[Mike Looijmans]

On 11/27/2014 02:17 PM, Richard Purdie wrote:
> On Thu, 2014-11-27 at 05:02 -0700, Gary Thomas wrote:
>> On 2014-11-27 01:35, Mike Looijmans wrote:
>>> Here's an example recipe to demonstrate the issue. Save it as "deployme.bb" into a recipe dir. Then build it for two machines. Building it for one machine will remove it from the
>>> deployment directory of the other. This problem has been bugging me for months, I had files just "disappear" mysteriously from the deploy directory and seemingly random times, and
>>> now I finally figured out what causes it.
>>>
>>> (cut here)
>>>
>>> SUMMARY = "Demonstrate a bug in OE deployment"
>>> DESCRIPTION = "Build this package for a machine X, then look at the image's \
>>>    deploy directory. You'll see a deployme.txt there. Now build it for another \
>>>    machine, e.g. "Y". The deployme.txt for machine X will have disappeared \
>>>    from the image dir. This appears to be a bug in OE's deployment."
>>> LICENSE = "GPLv2"
>>> LIC_FILES_CHKSUM = "file://${COREBASE}/LICENSE;md5=4d92cd373abda3937c2bc47fbc49d690"
>>>
>>> inherit allarch deploy
>>>
>>> do_compile () {
>>>       echo "Hello world!" > deployme.txt
>>> }
>>>
>>> do_deploy () {
>>>       install -d ${DEPLOYDIR}
>>>       install -m 644 ${B}/deployme.txt ${DEPLOYDIR}/
>>> }
>>>
>>> addtask deploy before do_build after do_compile
>>>
>>> (cut here)
>>
>> Very interesting & verified with the latest master.
>>
>> Have you filed a bug?  https://bugzilla.yoctoproject.org/
>
> Well, I'm not convinced this is a bug as such. You've created an
> "allarch" deploy task, how would you expect this to behave?
>
> "allarch" means that the output from this task is universal and can be
> used on all targets. It will therefore get run once.
>
> A "deploy" task is machine specific.
>
> What ends up happening is therefore the task has a stamp is
> "universally" created. When you change machine, the checksum of the task
> changes, the previous version is removed, the new version is installed.
>
> So in many ways the system is doing exactly what I would expect it to do
> and it isn't a bug in that sense.

It's not a bug in the sense that it doesn't do as it was programmed to do. I 
understand what's happening here.

I just think that the logic here is wrong. If "deploy" is machine specific, 
then the implicit "undeploy" should be machine specific too, right?

> The real question is how should an "allarch" + "deploy" task behave when
> you've specified machine specific paths? Perhaps erroring would be
> better?

That would mean that roughly all deploy tasks will fail. At best they're tied 
to MACHINE_ARCH, but never to MACHINE itself.

Would be strange to put PACKAGE_ARCH="${MACHINE}" in a recipe that clearly has 
no dependency on machine specific things. And I wrote "${MACHINE}" here on 
purpose.

I was thinking along the lines of "DEPLOY_DIR_IMAGE must have the same prefix" 
or so.

If I knew the solution, I'd have posted a patch instead of a question or report.

M.


Met vriendelijke groet / kind regards,

Mike Looijmans
System Expert


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