On Thu, 27 Aug 2020, Barry Smith wrote:

> 
> 
> > On Aug 27, 2020, at 4:55 PM, Jed Brown <j...@jedbrown.org> wrote:
> > 
> > Barry Smith <bsm...@petsc.dev> writes:
> > 
> >>> - readdocs pipeline
> >>> - merge-pipeline - auto starts - does the pre stage and pauses.
> >> 
> >> how are they related? 
> > 
> > Not at all.   The ReadTheDocs pipeline is managed by readthedocs.org.
> > 
> >> I understood Jed wanted the readdocs pipeline done automatically so it was 
> >> easy to review any readthedocs changes since the properly formatted new 
> >> docs with the changes was made automatically in the MR and pushes. I am 
> >> fine with this, though it seems silly to always do it instead of not just 
> >> doing it when there is a change to docs or maybe a docs label. Just 
> >> curious, is this done with a merge to master ?
> > 
> > We don't have control at that granularity.  We can disable the feature, but 
> > then we don't have a good way to review changes there.  I want to make 
> > writing and reviewing documentation changes as low friction as possible 
> > (because our docs, especially the manual, are pretty low quality and often 
> > out of date).
> > 
> > I figure if ReadTheDocs feels like they're wasting too much compute, they 
> > can add a finer grained control.
> 
> As I said I am fine with this readthedocs, assume it works.
> > 
> >> The second pipeline I don't understand. Aside from letting people who 
> >> don't use the GitLab API to  not have to hunt for the Pipelines window and 
> >> cut and past their branch name in and the merge to master business does it 
> >> serve any other purpose? Could we unset this for certain people who don't 
> >> like it in the .gitlab-ci.yaml file?
> > 
> 
>   If the second pipeline has nothing to do with readthedocs then why did your 
> MR also include it? Was it two completely different  unrelated things in one 
> MR? Or does readthedocs require MR pipelines to be on and somehow this 
> requires a regular MR pipeline be run even though not directly connected to 
> readthedocs, your stopping it and waiting is the only way to prevent it from 
> running fully? What about for some people supporting stopping it and 
> cancelling it once readthedocs is done or even deleting it then so it doesn't 
> clog the pipeline window with irrelevant stuff?
> 
>    I understand the utility of this second pipeline and the button for many 
> people but it does clog up the pipelines. I think some people should be able 
> to turn it off.
> 
> 
> 
> > What's wrong with using the API to release the paused job instead of using 
> > it to start a fresh pipeline?
> 
>   Generally I like to pass the Pipeline before making a PR. So the test on 
> creating a new MR is annoying. Yes after the initial MR I might be able to 
> release the paused job in lieu of starting pipelines fresh. It would be nice 
> to send some pushes that don't trigger a pipeline start at all because I know 
> I don't need one. Maybe that is possible, I'll need to investigate.


The above is  hard for me to digest - so I think its best to frame this 
differently.

1. ReadTheDocs is not setup in .gitlab-ci.yml

2. We have merge_request pipelines - and web pipelines [api pipeline is similar 
to web]

3. I think both - web, merge_request pipelines trigger ReadTheDocs job

4. Web pipeline appears to get a 6th stage from the ReadTheDocs job [because 
both are run on the branch - and the hash matches]

5. Web pipelines are manually started. But MR pipelines are automatically 
started [I don't see an option to disable this auto start]

6. The ReadTheDocs job  is run on the branch - even when triggered by 
merge_request pipeline. As the branch hash and the merge hash
are different - they are getting listed as 2 pipelines.

And I think this separate pipeline listing by ReadTheDocs is causing grief with 
the MR webpage [it assumes the tests have passed]

So the likely fixes:

- ReadTheDocs triggered by MR pipeline should use the merge - and not the 
original branch [and not create a separate pipeline listing]. This should cut 
down the pipeline listing by half
- somehow disable auto start of MR pipelines [this should eliminate the 
remaining pipeline listings.

Satish

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