QEMU-Devel Archive on lore.kernel.org
 help / color / Atom feed
From: John Snow <jsnow@redhat.com>
To: Markus Armbruster <armbru@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>,
	thuth@redhat.com, Eduardo Habkost <ehabkost@redhat.com>,
	Cleber Rosa <cleber@redhat.com>,
	qemu-devel@nongnu.org, mdroth@linux.vnet.ibm.com
Subject: Re: [PATCH] qapi: Fix code generation with Python 3.5
Date: Fri, 17 Jan 2020 14:41:06 -0500
Message-ID: <a6ea59a5-0877-fdeb-5b37-9ec3f31074a4@redhat.com> (raw)
In-Reply-To: <875zhapnlt.fsf@dusky.pond.sub.org>



On 1/17/20 2:07 AM, Markus Armbruster wrote:
> John Snow <jsnow@redhat.com> writes:
> 
>> On 1/16/20 3:25 PM, Markus Armbruster wrote:
>>> Recent commit 3e7fb5811b "qapi: Fix code generation for empty modules"
>>> modules" switched QAPISchema.visit() from
>>>
>>>     for entity in self._entity_list:
>>>
>>> effectively to
>>>
>>>     for mod in self._module_dict.values():
>>>         for entity in mod._entity_list:
>>>
>>> Visits in the same order as long as .values() is in insertion order.
>>> That's the case only for Python 3.6 and later.  Before, it's in some
>>> arbitrary order, which results in broken generated code.
>>>
>>> Fix by making self._module_dict an OrderedDict rather than a dict.
>>>
>>> Fixes: 3e7fb5811baab213dcc7149c3aa69442d683c26c
>>> Signed-off-by: Markus Armbruster <armbru@redhat.com>
>>> ---
>>>  scripts/qapi/schema.py | 2 +-
>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/scripts/qapi/schema.py b/scripts/qapi/schema.py
>>> index 0bfc5256fb..5100110fa2 100644
>>> --- a/scripts/qapi/schema.py
>>> +++ b/scripts/qapi/schema.py
>>> @@ -795,7 +795,7 @@ class QAPISchema(object):
>>>          self.docs = parser.docs
>>>          self._entity_list = []
>>>          self._entity_dict = {}
>>> -        self._module_dict = {}
>>> +        self._module_dict = OrderedDict()
>>>          self._schema_dir = os.path.dirname(fname)
>>>          self._make_module(None) # built-ins
>>>          self._make_module(fname)
>>>
>>
>> This problem has bitten me *many* times. I'm wondering if there's a
>> prescription that isn't just "Wait until we can stipulate 3.6+".
> 
> No clue.
> 
> 3.5 EOL is scheduled for 2020-09-13.
> https://devguide.python.org/#status-of-python-branches
> 
> We support 3.5 because we support Debian 9.
> 
> We'd normally drop support for Debian 9 two years after Debian 10,
> i.e. July 2021.  Assuming Debian supports it that far.  Whether they can
> truly support Python 3.5 after uptstream EOL seems doubtful.
> 

We should decide whether we consider Debian LTS to be adequately
supported, yes-or-no.

We should use a rule of "two years after successor, or End-of-Support,
whichever comes first."

For Debian, is end of support three years after it comes out, or is it
when the LTS is EOL?

In this specific case, do we trust that Debian 9 LTS will continue to
patch Python3.5 all the way up until July 2021?

--js



  reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-16 20:25 Markus Armbruster
2020-01-16 21:17 ` John Snow
2020-01-17  7:07   ` Markus Armbruster
2020-01-17 19:41     ` John Snow [this message]
2020-01-18  6:54       ` Markus Armbruster
2020-02-07 21:54         ` Eduardo Habkost
2020-01-18  8:29       ` Philippe Mathieu-Daudé
2020-01-20  5:46         ` [Qemu-devel] Xenial in Travis (was: qapi: Fix code generation with Python 3.5) Thomas Huth
2020-01-17  9:34 ` [PATCH] qapi: Fix code generation with Python 3.5 Thomas Huth
2020-01-17 10:49   ` Markus Armbruster
2020-01-18  8:33     ` Philippe Mathieu-Daudé
2020-01-19 11:23       ` Philippe Mathieu-Daudé
2020-01-20 10:52 ` Alex Bennée
2020-01-20 12:53 ` Peter Maydell

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=a6ea59a5-0877-fdeb-5b37-9ec3f31074a4@redhat.com \
    --to=jsnow@redhat.com \
    --cc=armbru@redhat.com \
    --cc=cleber@redhat.com \
    --cc=ehabkost@redhat.com \
    --cc=mdroth@linux.vnet.ibm.com \
    --cc=peter.maydell@linaro.org \
    --cc=qemu-devel@nongnu.org \
    --cc=thuth@redhat.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

QEMU-Devel Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/qemu-devel/0 qemu-devel/git/0.git
	git clone --mirror https://lore.kernel.org/qemu-devel/1 qemu-devel/git/1.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 qemu-devel qemu-devel/ https://lore.kernel.org/qemu-devel \
		qemu-devel@nongnu.org
	public-inbox-index qemu-devel

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.nongnu.qemu-devel


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git