Re: [netmod] import-by-semver issue
"Rob Wilton (rwilton)" <rwilton@cisco.com> Sun, 24 March 2019 09:40 UTC
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From: "Rob Wilton (rwilton)" <rwilton@cisco.com>
To: Andy Bierman <andy@yumaworks.com>, NetMod WG <netmod@ietf.org>
Thread-Topic: [netmod] import-by-semver issue
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Date: Sun, 24 Mar 2019 09:39:41 +0000
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Subject: Re: [netmod] import-by-semver issue
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Hi Andy, Yes we are currently implementing the module version field, although that may change depending on what different the final solution ends up being. Support for import-by-version is less critical for us, and hence implementation would lag. In terms of the issue that you raise: - I would expect that a compiler that understands semver to preload the semver extension, possibly allow with other common YANG type files, extensions). - For a compile that doesn’t understand semver then it would just ignore the extension, which should be fine. I agree that it would be nice if this extension was part of the core YANG language, but I don’t think that is necessarily required. Thanks, Rob From: netmod <netmod-bounces@ietf.org> On Behalf Of Andy Bierman Sent: 23 March 2019 19:01 To: NetMod WG <netmod@ietf.org> Subject: [netmod] import-by-semver issue Hi, I am wondering if there are implementations of this draft: https://tools.ietf.org/html/draft-verdt-netmod-yang-semver-00 Specifically, implementation of the 'version' extension https://tools.ietf.org/html/draft-verdt-netmod-yang-semver-00#section-3 IMO it is a really bad idea to put the semantics of how to import modules in one of the modules that is imported. Your example shows ietf-semver imported first with no extension, but it could be last with a version extension. // all other imports, then last.... import ietf-semver { prefix "semver"; semver:version 1.1.2; } Translation unit parsing is something that needs to be built into the compiler. This should be part of YANG 1.2 if it is done. import example-module { prefix exmod; version 1.2.0+; } To a compiler writer, the difference is huge. (ietf-semver extensions need to be built-in statements in YANG, at least 'version') BTW, all the import examples are missing the mandatory prefix-stmt Andy
- [netmod] import-by-semver issue Andy Bierman
- Re: [netmod] import-by-semver issue Rob Wilton (rwilton)
- Re: [netmod] import-by-semver issue Andy Bierman
- Re: [netmod] import-by-semver issue Rob Wilton (rwilton)
- Re: [netmod] import-by-semver issue Juergen Schoenwaelder
- Re: [netmod] import-by-semver issue Rob Wilton (rwilton)
- Re: [netmod] import-by-semver issue Martin Bjorklund
- Re: [netmod] import-by-semver issue Rob Wilton (rwilton)
- Re: [netmod] import-by-semver issue Juergen Schoenwaelder
- Re: [netmod] import-by-semver issue Andy Bierman
- Re: [netmod] import-by-semver issue Martin Bjorklund