[openstack-dev] [tripleo][ui] Dependency management

Alan Pevec apevec at redhat.com
Fri Mar 2 22:52:09 UTC 2018

On Mon, Jan 22, 2018 at 9:30 AM, Julie Pichon <jpichon at redhat.com> wrote:
> On 19 January 2018 at 18:43, Honza Pokorny <honza at redhat.com> wrote:
>> We've recently discovered an issue with the way we handle dependencies for
>> tripleo-ui.  This is an explanation of the problem, and a proposed solution.
>> I'm looking for feedback.
>> Before the upgrade to zuul v3 in TripleO CI, we had two types of jobs for
>> tripleo-ui:
>> * Native npm jobs
>> * Undercloud integration jobs
>> After the upgrade, the integration jobs went away.  Our goal is to add them
>> back.
>> There is a difference in how these two types of jobs handle dependencies.
>> Native npm jobs use the "npm install" command to acquire packages, and
>> undercloud jobs use RPMs.  The tripleo-ui project uses a separate RPM for
>> dependencies called openstack-tripleo-ui-deps.
>> Because of the requirement to use a separate RPM for dependencies, there is some
>> extra work needed when a new dependency is introduced, or an existing one is
>> upgraded.  Once the patch that introduces the dependency is merged, we have to
>> increment the version of the -deps package, and rebuild it.  It then shows up in
>> the yum repos used by the undercloud.
>> To make matters worse, we recently upgraded our infrastructure to nodejs 8.9.4
>> and npm 5.6.0 (latest stable).  This makes it so we can't write "purist" patches
>> that simply introduce a new dependency to package.json, and nothing more.  The
>> code that uses the new dependency must be included.  I tend to think that each
>> commit should work on its own so this can be seen as a plus.
>> This presents a problem: you can't get a patch that introduces a new dependency
>> merged because it's not included in the RPM needed by the undercloud ci job.
>> So, here is a proposal on how that might work:
>> 1. Submit a patch for review that introduces the dependency, along with code
>>    changes to support it and validate its inclusion
>> 2. Native npm jobs will pass
>> 3. Undercloud gate job will fail because the dependency isn't in -deps RPM
>> 4. We ask RDO to review for licensing
>> 5. Once reviewed, new -deps package is built
>> 6. Recheck
>> 7. All jobs pass
> Perhaps there should be a step after 3 or 4 to have the patch normally
> reviewed, and wait for it to have two +2s before building the new
> package? Otherwise we may end up with wasted work to get a new package
> ready for dependencies that were eventually dismissed.

Thanks Julie for reminding me of  this thread!

I agree we can only build ui-deps package when the review is about to merge.
I've proposed https://github.com/rdo-common/openstack-tripleo-ui-deps/pull/19
which allows us to build the package with the review and patchset
numbers, before it's merged.
Please review and we can try it on the next deps update!


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