Re: Fedora 31 Self-Contained Change proposal: Limit Scriptlet Usage of core packages

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On Mon, 2019-07-01 at 17:03 -0400, Robbie Harwood wrote:
> Ben Cotton <bcotton@xxxxxxxxxx> writes:
> 
> > == Detailed Description ==
> > 
> > Currently we know how to make an installable OS with packages that
> > doesn't require the use of scriptlets, indeed rpm-ostree and others
> > have already done this on a significantly bigger scale. So we plan
> > to
> > remove direct scriptlets from most (if not all) of the packages in
> > the
> > main fedora container image for Fedora 31. This means all four of:
> > %pre/%post/%preun/%postun. After this change it'd be good to have
> > some
> > kind of temporary exception to be granted before those packages
> > could
> > add a scriptlet back (post F31 work).
> 
> Do I understand correctly that triggers aren't affected here?

 Yes.

> > Almost all of the hard work is already done, as rpm can react to
> > files
> > being dropped in specified places with known actions (Eg. In this
> > way
> > systemd components can create users or files). There are a few
> > minor
> > changes needed to packages to move from the old way of doing things
> > (Eg. calling adduser) to doing the new thing. Note that while a
> > program will still be run at installation time, those programs will
> > be
> > few and easily audited (as against the 666 slightly different ways
> > of
> > adding a user we currently have).
> 
> Is there a document describing common things that are done with
> scriptlets and the "proper", non-scriptlet way to do them?  (If not,
> could one be made?)

 I don't believe there is a single document atm. ... I could look at
putting one somewhere, although it's a bit like lumping random things
together because we happen to be doing them at the same time.

> > == Scope ==
> > 
> > Proposal owners:
> > 
> > * James Antill
> > * 1 needs to get combine.d into the distribution, and then
> > /etc/shells
> > can use that.
> > * 2 minor wrangling of package owners to tweak specfiles.
> 
> Do I understand correctly that you plan to send PRs to all packages
> in question?

 Yes.

> > * Other developers:
> > 
> > * Policies and guidelines: We should work toward only allowing new
> > scriptlets to appear with policy exceptions, in any of the fixed
> > packages. This needs to be done somewhat carefully, and post F31.
> 
> Would it be possible to write the policy first, rather than trying to
> get maintainers to conform to an unknown standard?

 The policy here is talking about after it's done, so that things don't
slide back. Kind of like the "no new sysv-init scripts" came after the
conversion to systemd unit files was accpeted/done.

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