From patchwork Tue Mar 11 11:31:03 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Markus Armbruster X-Patchwork-Id: 14011607 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6B64CC282EC for ; Tue, 11 Mar 2025 11:51:13 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1trxqd-0003IR-8S; Tue, 11 Mar 2025 07:32:35 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1trxqG-00038Q-QF for qemu-devel@nongnu.org; Tue, 11 Mar 2025 07:32:14 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1trxq2-0006VA-Ox for qemu-devel@nongnu.org; Tue, 11 Mar 2025 07:32:12 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1741692716; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=5fZBYHPU0s8pnspvGGVnSt0xUuMA4YP0JAp3hNrbBEI=; b=Mrltsf1saC5q7yzAMKJL2MFFhajMZY32Vvf0/PbT3lv3NyBxPJJTPBh+qnwkvE9/GEWOPa MRoRrozAvra78jIavgvL9xRMFq6PPFsmcM59fVe1PmHOKf+Lvyr1TpoZ1hwEevZ+YHaliZ XqNReAoPR7P2VVXs5gNMkJB6srzAto0= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-651-smId9DynP-SzZnAlpwPY_g-1; Tue, 11 Mar 2025 07:31:54 -0400 X-MC-Unique: smId9DynP-SzZnAlpwPY_g-1 X-Mimecast-MFC-AGG-ID: smId9DynP-SzZnAlpwPY_g_1741692714 Received: from mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.15]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 01EA31955BCC for ; Tue, 11 Mar 2025 11:31:54 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.22.74.4]) by mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 596CE19560B9 for ; Tue, 11 Mar 2025 11:31:53 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 268DA21E64BD; Tue, 11 Mar 2025 12:31:38 +0100 (CET) From: Markus Armbruster To: qemu-devel@nongnu.org Cc: stefanha@redhat.com, John Snow Subject: [PULL 27/61] docs/qapi-domain: add XREF compatibility goop for Sphinx < 4.1 Date: Tue, 11 Mar 2025 12:31:03 +0100 Message-ID: <20250311113137.1277125-28-armbru@redhat.com> In-Reply-To: <20250311113137.1277125-1-armbru@redhat.com> References: <20250311113137.1277125-1-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 Received-SPF: pass client-ip=170.10.129.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: John Snow Sphinx < 4.1 handles cross-references ... differently. Factor out and isolate the compatibility goop we need to make cross references work properly in old versions of Sphinx. Yes, it's ugly. Yes, it works. No, I don't want to talk about it. Understand that this patch exists because of the overflowing love in my heart. Signed-off-by: John Snow Message-ID: <20250311034303.75779-30-jsnow@redhat.com> Acked-by: Markus Armbruster Signed-off-by: Markus Armbruster --- docs/sphinx/compat.py | 136 +++++++++++++++++++++++++++++++++++-- docs/sphinx/qapi_domain.py | 23 ++++--- 2 files changed, 144 insertions(+), 15 deletions(-) diff --git a/docs/sphinx/compat.py b/docs/sphinx/compat.py index 6bc698c5ad..f068d70388 100644 --- a/docs/sphinx/compat.py +++ b/docs/sphinx/compat.py @@ -2,14 +2,31 @@ Sphinx cross-version compatibility goop """ -from typing import Callable +import re +from typing import ( + Any, + Callable, + Optional, + Type, +) +from docutils import nodes from docutils.nodes import Element, Node, Text import sphinx -from sphinx import addnodes -from sphinx.util import nodes -from sphinx.util.docutils import SphinxDirective, switch_source_input +from sphinx import addnodes, util +from sphinx.environment import BuildEnvironment +from sphinx.roles import XRefRole +from sphinx.util import docfields +from sphinx.util.docutils import ( + ReferenceRole, + SphinxDirective, + switch_source_input, +) +from sphinx.util.typing import TextlikeNode + + +MAKE_XREF_WORKAROUND = sphinx.version_info[:3] < (4, 1, 0) SpaceNode: Callable[[str], Node] @@ -36,7 +53,7 @@ def nested_parse_with_titles( try: # Modern sphinx (6.2.0+) supports proper offsetting for # nested parse error context management - nodes.nested_parse_with_titles( + util.nodes.nested_parse_with_titles( directive.state, directive.content, content_node, @@ -45,6 +62,113 @@ def nested_parse_with_titles( except TypeError: # No content_offset argument. Fall back to SSI method. with switch_source_input(directive.state, directive.content): - nodes.nested_parse_with_titles( + util.nodes.nested_parse_with_titles( directive.state, directive.content, content_node ) + + +# ########################################### +# xref compatibility hacks for Sphinx < 4.1 # +# ########################################### + +# When we require >= Sphinx 4.1, the following function and the +# subsequent 3 compatibility classes can be removed. Anywhere in +# qapi_domain that uses one of these Compat* types can be switched to +# using the garden-variety lib-provided classes with no trickery. + + +def _compat_make_xref( # pylint: disable=unused-argument + self: sphinx.util.docfields.Field, + rolename: str, + domain: str, + target: str, + innernode: Type[TextlikeNode] = addnodes.literal_emphasis, + contnode: Optional[Node] = None, + env: Optional[BuildEnvironment] = None, + inliner: Any = None, + location: Any = None, +) -> Node: + """ + Compatibility workaround for Sphinx versions prior to 4.1.0. + + Older sphinx versions do not use the domain's XRefRole for parsing + and formatting cross-references, so we need to perform this magick + ourselves to avoid needing to write the parser/formatter in two + separate places. + + This workaround isn't brick-for-brick compatible with modern Sphinx + versions, because we do not have access to the parent directive's + state during this parsing like we do in more modern versions. + + It's no worse than what pre-Sphinx 4.1.0 does, so... oh well! + """ + + # Yes, this function is gross. Pre-4.1 support is a miracle. + # pylint: disable=too-many-locals + + assert env + # Note: Sphinx's own code ignores the type warning here, too. + if not rolename: + return contnode or innernode(target, target) # type: ignore[call-arg] + + # Get the role instance, but don't *execute it* - we lack the + # correct state to do so. Instead, we'll just use its public + # methods to do our reference formatting, and emulate the rest. + role = env.get_domain(domain).roles[rolename] + assert isinstance(role, XRefRole) + + # XRefRole features not supported by this compatibility shim; + # these were not supported in Sphinx 3.x either, so nothing of + # value is really lost. + assert not target.startswith("!") + assert not re.match(ReferenceRole.explicit_title_re, target) + assert not role.lowercase + assert not role.fix_parens + + # Code below based mostly on sphinx.roles.XRefRole; run() and + # create_xref_node() + options = { + "refdoc": env.docname, + "refdomain": domain, + "reftype": rolename, + "refexplicit": False, + "refwarn": role.warn_dangling, + } + refnode = role.nodeclass(target, **options) + title, target = role.process_link(env, refnode, False, target, target) + refnode["reftarget"] = target + classes = ["xref", domain, f"{domain}-{rolename}"] + refnode += role.innernodeclass(target, title, classes=classes) + + # This is the very gross part of the hack. Normally, + # result_nodes takes a document object to which we would pass + # self.inliner.document. Prior to Sphinx 4.1, we don't *have* an + # inliner to pass, so we have nothing to pass here. However, the + # actual implementation of role.result_nodes in this case + # doesn't actually use that argument, so this winds up being + # ... fine. Rest easy at night knowing this code only runs under + # old versions of Sphinx, so at least it won't change in the + # future on us and lead to surprising new failures. + # Gross, I know. + result_nodes, _messages = role.result_nodes( + None, # type: ignore + env, + refnode, + is_ref=True, + ) + return nodes.inline(target, "", *result_nodes) + + +class CompatField(docfields.Field): + if MAKE_XREF_WORKAROUND: + make_xref = _compat_make_xref + + +class CompatGroupedField(docfields.GroupedField): + if MAKE_XREF_WORKAROUND: + make_xref = _compat_make_xref + + +class CompatTypedField(docfields.TypedField): + if MAKE_XREF_WORKAROUND: + make_xref = _compat_make_xref diff --git a/docs/sphinx/qapi_domain.py b/docs/sphinx/qapi_domain.py index 06fe78ce0b..3b1490e29a 100644 --- a/docs/sphinx/qapi_domain.py +++ b/docs/sphinx/qapi_domain.py @@ -24,7 +24,13 @@ from docutils import nodes from docutils.parsers.rst import directives -from compat import KeywordNode, SpaceNode +from compat import ( + CompatField, + CompatGroupedField, + CompatTypedField, + KeywordNode, + SpaceNode, +) from sphinx import addnodes from sphinx.addnodes import desc_signature, pending_xref from sphinx.directives import ObjectDescription @@ -37,7 +43,6 @@ from sphinx.locale import _, __ from sphinx.roles import XRefRole from sphinx.util import logging -from sphinx.util.docfields import Field, GroupedField, TypedField from sphinx.util.nodes import make_id, make_refnode @@ -264,7 +269,7 @@ class QAPIObject(QAPIDescription): doc_field_types = [ # :feat name: descr - GroupedField( + CompatGroupedField( "feature", label=_("Features"), names=("feat",), @@ -434,7 +439,7 @@ class QAPICommand(QAPIObject): doc_field_types.extend( [ # :arg TypeName ArgName: descr - TypedField( + CompatTypedField( "argument", label=_("Arguments"), names=("arg",), @@ -442,14 +447,14 @@ class QAPICommand(QAPIObject): can_collapse=False, ), # :error: descr - Field( + CompatField( "error", label=_("Errors"), names=("error", "errors"), has_arg=False, ), # :return TypeName: descr - GroupedField( + CompatGroupedField( "returnvalue", label=_("Return"), rolename="type", @@ -467,7 +472,7 @@ class QAPIEnum(QAPIObject): doc_field_types.extend( [ # :value name: descr - GroupedField( + CompatGroupedField( "value", label=_("Values"), names=("value",), @@ -484,7 +489,7 @@ class QAPIAlternate(QAPIObject): doc_field_types.extend( [ # :alt type name: descr - TypedField( + CompatTypedField( "alternative", label=_("Alternatives"), names=("alt",), @@ -502,7 +507,7 @@ class QAPIObjectWithMembers(QAPIObject): doc_field_types.extend( [ # :member type name: descr - TypedField( + CompatTypedField( "member", label=_("Members"), names=("memb",),