Re: [netmod] Joint WGLC on "semver" and "module-versioning" drafts

[tom petch <[e-mail]>]

From: netmod <[e-mail]> on behalf of Jürgen Schönwälder <[e-mail]>
Sent: 06 June 2023 06:06

On Mon, Jun 05, 2023 at 10:32:51PM +0200, Martin Björklund wrote:
> >
> > If the goal is to produce YANG 1.2 which (i) integrates semantic
> > versioning into YANG and (ii) fixes known bugs in YANG 1.1 and (iii)
> > does not add any other new features, then having agreement on such a
> > statement will help to steer the process.
>
> I hope that (i) doesn't happen.  I think it is the proposed changes in
> draft-ietf-netmod-yang-module-versioning that require a new YANG
> version.  If this new YANG version allows for other versioning schemes
> than revision-date, then we can keep the modified semver scheme
> outside the core document.
>

I consider the module update rules a part of a versioning model. The
current update rules were written to support the current versioning
model. If we want to support multiple versioning models, then we have
to refactor the update rules out of the YANG language specification
into separate versioning specifications, i.e., traditional YANG
versioning and the new semver versioning. There are some language
mechanisms (like the import statement), that have to be flexible
enough to support multiple versioning schemes.

<tp>
I am not sure that I understand.  Authors of a compiler need to know what they might  encounter in future and so I see module update rules as a part of the language, what updates are permitted and what are not so that authors can allow for such changes.  As to which updates then become a new version, level or revision, how they are packaged, I see as a separate question.

Tom Petch
.
Is it worth factoring the versioning model out of the language? I
guess the opinions vary widely on this, depending on the dynamics of
the software environment people are working in.

/js

--
Jürgen Schönwälder              Constructor University Bremen gGmbH
Phone: [phone]         Campus Ring 1 | 28759 Bremen | Germany
Fax:   [phone]         <https://constructor.university/>

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