Re: [RFC PATCH v1 0/8] qapi: add generator for Golang interface

[Victor Toso]

Hi,

On Tue, May 10, 2022 at 09:53:05AM +0100, Daniel P. Berrangé wrote:
> > > * License
> > >
> > > While the generator (golang.py in this series) is GPL v2, the
> > 
> > I'd make it v2+, just to express my displeasure with the decision to
> > make the initial QAPI generator v2 only for no good reason at all.
> 
> Our policy is that all new code should be v2+ anyway, unless it
> was clearly derived from some pre-existing v2-only code. Upto
> Victor to say whether the golang.py is considered clean, or was
> copy+paste in any parts from existin v2-only code

Should be fine to consider it v2+, the generator.

> > > generated code needs to be compatible with other Golang projects,
> > > such as the ones mentioned above. My intention is to keep a Go
> > > module with a MIT license.
> >
> > Meh.  Can't be helped, I guess.
> 
> This does make me wonder though whether the license of the QAPI
> input files has a bearing on the Go (or other $LANGUAGE) ouput
> files. eg is the Go code to be considered a derived work of the
> QAPI JSON files.

GPL does not enforce that the generated code to be GPL [0] unless
the generator copies GPL code to the output. My only concern has
been the fact that I am copying the documentation of QAPI
specification to the Go package in order to have data structures,
commands, etc. with the information provided by the
specification.

[0] https://www.gnu.org/licenses/old-licenses/gpl-2.0-faq.html#GPLOutput

> I'm not finding a clearly articulated POV on this question so
> far.

I don't find it trivial either but I've accepted that the Go data
structures are fine based on [0] and the documentation can be
split from the Go module (sadly!) if someone finds it to be a
legal issue.

Cheers,
Victor

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