Re: Fedora Source-git SIG report #1 (June 2021)

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On Thu, Jun 24, 2021 at 8:09 PM Zbigniew Jędrzejewski-Szmek
<zbyszek@xxxxxxxxx> wrote:
>
> On Thu, Jun 24, 2021 at 03:48:54PM +0200, Tomas Tomecek wrote:
> > On Thu, Jun 24, 2021 at 12:41 PM Miro Hrončok <mhroncok@xxxxxxxxxx> wrote:
> > >
> > > On 24. 06. 21 11:16, Tomas Tomecek wrote:
> > > > ## Choosing git forge to host source-git repositories
> > > > We need to find a home for all the source-git repositories. This is
> > > > actually a really hard task because we have many options (github.com,
> > > > gitlab.com, pagure.io, src.fedoraproject.org, something custom or
> > > > on-premise) and different expectations: some projects already have
> > > > repos set up on different platforms while Pagure is the primary forge
> > > > now. Since the CPE team is investigating GitLab as a forge, it's even
> > > > harder for us to figure out the primary forge. We may end up
> > > > supporting both actually: pagure.io and gitlab.com. What are your
> > > > thoughts on this topic? Would you prefer pagure.io or gitlab.com
> > > > More info:
> > > > * https://pagure.io/fedora-source-git/sig/issue/1
> > > > * https://pagure.io/fedora-source-git/sig/issue/7
> > >
> > > I would expect that since the soruce git is just an intermediate thing,
> > > supporting "any forge" is nice to have, but hard. I'd start with some common
> > > options (Pagure + 1 other) and see where you'll get.
> >
> > Yep, that's exactly what I'd like us to do. As soon as we have the
> > service which accepts processes events up and running, it shouldn't be
> > that hard to teach it new fedora-messaging messages or webhook
> > payloads.
> >
> > > > ## High-level workflow proposal up for review
> > > > Hunor proposed a high-level workflow linked below and I strongly
> > > > recommend reading it. We have also started discussing many details in
> > > > the process, such as getting archives: should we generate one from the
> > > > source-git repo or use the official release archive from upstream?
> > >
> > > One thing to consider is that the upstream tarballs might be cryptographically
> > > signed and packages should verify the signature in %prep.
> >
> > This is a very good point - in such a case, we should always pull the
> > official upstream tarball instead of generating a new one downstream.
>
> Hmm, but how would that work? I thought that the whole point of
> source-git is to build from a commit that contains some upstream
> version + downstream patches + downstream distro config like the spec file,
> and that the build step of applying downstream patches just doesn't exist.
> If you reuse the upstream tarball, then by necessity those downstream
> patches need to be serialized and applied on top like in dist-git. So
> you lose the property that the checkout from version control is *the*
> source you build, but you also lose the property that the source you
> build is what was signed (since patches are applied).

What you just described I understand as an (upstream) maintenance
branch and is not what we call source-git.

Our definition of source-git is:
* upstream release tarball
* downstream code changes applied as patches during %prep
* additional configs for sake of building and testing

It's not that one workflow is better than the other: teams tend to
pick one and use it to maintain their project based on their
preference and ease of use.

I hope we'd be able to support both workflows but right now we focus
on the source-git part.


HTH,

Tomas
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