Invitation: QAPI Sync meeting @ Thu Oct 7, 2021 9am - 10am (EDT) (qemu-devel@nongnu.org)

Invitation: QAPI Sync meeting @ Thu Oct 7, 2021 9am - 10am (EDT) (qemu-devel@nongnu.org)

[jsnow]

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You have been invited to the following event.

Title: QAPI Sync meeting
Let's discuss our ongoing and future work on the QAPI generator and closely  
related interfaces for QEMU.

Please prepare for the meeting by writing a small overview of your pending  
and future work, and the goals that motivate those works. If you send this  
summary to the mailing list beforehand, we'll have the opportunity to skim  
it prior to the meeting.

I am suggesting we use a public etherpad instance to keep notes during the  
meeting: https://etherpad.wikimedia.org/p/qapi-sync

During this meeting, I'd like to assemble a list of all ongoing QAPI work  
and begin work on crafting a roadmap that helps describe that work.

I don't suspect we'll finish in a single meeting, but it may be a helpful  
primer for follow-up discussions on the ML.
When: Thu Oct 7, 2021 9am – 10am Eastern Time - New York

Joining info: Join with Google Meet
https://meet.google.com/xqi-tiqs-xrz?hs=224

Join by phone
(US) +1 929-249-4854 (PIN: 637379240)

Join using SIP
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More joining options: https://tel.meet/xqi-tiqs-xrz?pin=6779067023105&hs=0

Calendar: qemu-devel@nongnu.org
Who:
     * jsnow@redhat.com - organizer
     * berrange@redhat.com
     * pbonzini@redhat.com
     * armbru@redhat.com
     * damien.hedde@greensocs.com
     * marcandre.lureau@redhat.com
     * kwolf@redhat.com
     * qemu-devel@nongnu.org

Event details:  
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DESCRIPTION:Let's discuss our ongoing and future work on the QAPI generator
  and closely related interfaces for QEMU.\n\nPlease prepare for the meeting
  by writing a small overview of your pending and future work\, and the goal
 s that motivate those works. If you send this summary to the mailing list b
 eforehand\, we'll have the opportunity to skim it prior to the meeting.\n\n
 I am suggesting we use a public etherpad instance to keep notes during the 
 meeting: https://etherpad.wikimedia.org/p/qapi-sync\n\nDuring this meeting\
 , I'd like to assemble a list of all ongoing QAPI work and begin work on cr
 afting a roadmap that helps describe that work.\n\nI don't suspect we'll fi
 nish in a single meeting\, but it may be a helpful primer for follow-up dis
 cussions on the ML.\n\n-::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:
 ~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-\nDo not edit this section of the descri
 ption.\n\nThis event has a video call.\nJoin: https://meet.google.com/xqi-t
 iqs-xrz\n(US) +1 929-249-4854 PIN: 637379240#\n\nJoin using SIP\n6779067023
 105@gmeet.redhat.com (ID: 6779067023105)\nView more joining options: https:
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Re: Invitation: QAPI Sync meeting @ Thu Oct 7, 2021 9am - 10am (EDT) (qemu-devel@nongnu.org)

[Markus Armbruster]

Thursday crept up on me...  I just noticed we haven't gotten around to
circulate a one-page summary of the topics of interest.  In the hope
that late & crude is better than never, here's mine.  If I misunderstand
you, please be lenient, and correct me on the call.

= Technical =

Marc-André is interested in language bindings, Rust in particular.  He
explored this some.  There are problems.

Kevin and Markus are interested in CLI QAPIfication, and QAPI/QOM
integration.

Daniel is interested in 100% pure QAPI-based QEMU configuration.

For proper CLI QAPIfication, the traditional / "human-friendly"syntax
should become a wrapper around "machine-friendly", just like HMP is /
should be a wrapper around QMP.  He's exploring techniques that let us
avoid writing these wrappers completely by hand.

The external QOM interfaces are not specified in QAPI, and therefore not
covered by QAPI introspection.  QAPI/QOM integration could fix that, and
also generate QOM boilerplate.

The way -device / device_add is implemented defeats type checking.  If
we fix that, users that get the types wrong break.  Libvirt does.

John and Markus are interested in making the QAPI code generator easier
to maintain.  Type hints, in particular

Markus is interested in extending QAPI special feature flags and -compat
beyond "deprecated".

= Process =

How can we make the merging of non-trivial QAPI language work less
painfully slow?