Re: [PATCH-for-5.2 2/2] gitlab-ci: Avoid running the EDK2 job when not necessary

[Philippe Mathieu-Daudé]

On 11/11/20 10:18 AM, Philippe Mathieu-Daudé wrote:
> On 11/10/20 4:35 PM, Daniel P. Berrangé wrote:
>> On Tue, Nov 10, 2020 at 01:16:06PM +0100, Philippe Mathieu-Daudé wrote:
>>> The EDK2 jobs use the 'changes' keyword, which "makes it
>>> possible to define if a job should be created based on files
>>> modified by a Git push event." (see [1]). This keyword comes
>>> with a warning:
>>>
>>>   Caution:
>>>
>>>     In pipelines with sources other than the three above
>>>     changes can’t determine if a given file is new or old
>>>     and always returns true."
>>>
>>> In commit 922febe2af we moved the YAML config file from the
>>> repository root directory to the .gitlab-ci.d/ directory.
>>>
>>> We didn't respect the previous warning and disabled the
>>> 'changes' filter rule, as the files are now in a (directory)
>>> three above the YAML config file.
>>
>> This description is a bit wierd. I don't see how the location
>> in the directory tree has any relevance here.
>>
>> IIUC the caution docs quoted above are referring to what triggered 
>> the pipeline. They're saying that if the trigger was not a "branch", 
>> "merge request", or "external pull request", then the "changes" rule 
>> always evaluates true.
>>
>> The "branch" source us a bit wierd though, as I'm not seeing
>> how gitlab figures out which commits are "new" to the pipeline
>> and thus whether the files were modified or not.
>>
>> Strangely qemu-project/qemu CI for master seems to be behaving
>> correctly and skipping the jobs.
> 
> What about this one?
> 
> https://gitlab.com/berrange/qemu/-/jobs/827459510

Ping?

> 
>>
>> Something is fishy here and clearly not working, so clearly
>> changes are needed, but the commit message is not explaining
>> it for me.
>>
>>> This jobs takes ~40min, and needlessly burns the 2000 minutes
>>> available to GitLab free users. Follow the recommendations in
>>> [3] and disable this job by default (except if we push a tag
>>> or the branch contains 'edk2'). Note we do not remove the job
>>> from the pipeline, it can still be triggered manually from the
>>> WebUI.