Commit graph

113 commits

Author SHA1 Message Date
John Snow
a738817c1d docs/qapidoc: linting fixes
This restores the linting baseline in qapidoc. The order of some imports
change slightly here due to configuring isort a little better:
previously, isort was having difficulty understanding that "compat" and
"qapidoc_legacy" were local modules because docs/sphinx "isn't a python
package". Configuring this manually, isort chooses a different import
ordering, which _is_ intentional here.

Also: extra ignores are added for pylint. The most recent versions of
pylint don't require these ignores, but the oldest versions we support
do, so in the extra ignores go.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-id: 20250604200354.459501-3-jsnow@redhat.com
2025-06-05 12:08:53 -04:00
Markus Armbruster
6d7b3efc3f docs/sphinx/qmp_lexer: Highlight elisions like comments, not prompts
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20250404121413.1743790-8-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2025-04-08 09:04:34 +02:00
Markus Armbruster
bc361f2f9b docs/sphinx/qmp_lexer: Generalize elision syntax
Accept "... lorem ipsum ..."  in addition to "...".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20250404121413.1743790-7-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2025-04-08 09:04:34 +02:00
John Snow
25d44f57e1 docs/qapi-domain: add namespaced index support
Generate an index-per-namespace for the QAPI domain. Due to a limitation
with Sphinx's architecture, these indices must be defined during setup
time and cannot be dynamically created on-demand when a namespace
directive is encountered.

Owing to that limitation, add a configuration value to conf.py that
specifies which QAPI namespaces we'll generate indices for.

Indices will be named after their namespace, e.g. the "QMP" namespace
will generate to "qapi-qmp-index.html" and can be referenced using
`qapi-qmp-index`.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250313044312.189276-9-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-14 07:32:41 +01:00
John Snow
7127e14f15 docs/qapi_domain: add namespace support to cross-references
This patch does three things:

1. Record the current namespace context in pending_xrefs so it can be
   used for link resolution later,
2. Pass that recorded namespace context to find_obj() when resolving a
   reference, and
3. Wildly and completely rewrite find_obj().

cross-reference support is expanded to tolerate the presence or absence
of either namespace or module, and to cope with the presence or absence
of contextual information for either.

References now work like this:

1. If the explicit reference target is recorded in the domain's object
   registry, we link to that target and stop looking. We do this lookup
   regardless of how fully qualified the target is, which allows direct
   references to modules (which don't have a module component to their
   names) or direct references to definitions that may or may not belong
   to a namespace or module.

2. If contextual information is available from qapi:namespace or
   qapi:module directives, try using those components to find a direct
   match to the implied target name.

3. If both prior lookups fail, generate a series of regular expressions
   looking for wildcard matches in order from most to least
   specific. Any explicitly provided components (namespace, module)
   *must* match exactly, but both contextual and entirely omitted
   components are allowed to differ from the search result. Note that if
   more than one result is found, Sphinx will emit a warning (a build
   error for QEMU) and list all of the candidate references.

The practical upshot is that in the large majority of cases, namespace
and module information is not required when creating simple `references`
to definitions from within the same context -- even when identical
definitions exist in other contexts.

Even when using simple `references` from elsewhere in the QEMU
documentation manual, explicit namespace info is not required if there
is only one definition by that name.

Disambiguation *will* be required from outside of the QAPI documentation
when referencing e.g. block-core definitions, which are shared between
QEMU QMP and the QEMU Storage Daemon. In that case, there are two
options:

A: References can be made partially or fully explicit,
   e.g. `QMP:block-dirty-bitmap-add` will link to the QEMU version of
   the definition, while `QSD:block-dirty-bitmap-add` would link to the
   QSD version.

B: If all of the references in a document are intended to go to the same
   place, you can insert a "qapi:namespace:: QMP" directive to influence
   the fuzzy-searching for later references.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250313044312.189276-8-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
[Commit message typo fixed]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-14 07:32:21 +01:00
John Snow
b1df602ebb docs/qapidoc: add :namespace: option to qapi-doc directive
Add a :namespace: option to the qapi-doc directive, which inserts a
qapi:namespace directive into the start of the generated document. This,
in turn, associates all auto-generated definitions by this directive
with the specified namespace.

The source info for these generated lines are credited to the start of
the qapi-doc directive, which isn't precisely correct, but I wasn't sure
how to get it more accurate without some re-parsing shenanigans.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250313044312.189276-7-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-14 07:31:57 +01:00
John Snow
7c7247b252 docs/qapi-domain: add qapi:namespace directive
Add a new directive that marks the beginning of a QAPI "namespace", for
example; "QMP", "QGA" or "QSD". This directive will associate all
subsequent QAPI directives in a document with the specified
namespace. This does not change the visual display of any of the
definitions or index entries, but does change the "Fully Qualified Name"
inside the QAPI domain's object table. This allows for two different
"namespaces" to define entities with otherwise identical names -- which
will come in handy for documenting both QEMU QMP and the QEMU Storage
Daemon.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250313044312.189276-6-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-14 07:31:57 +01:00
John Snow
9ca404f004 docs/qapi-domain: add :namespace: override option
Akin to the :module: override option, the :namespace: options allows you
to forcibly override the contextual namespace associatied with a
definition.

We don't necessarily actually need this, but I felt compelled to stick
close to how the Python domain works that offers context overrides.

As of this commit, it is possible to add e.g. ":namespace: QMP" to any
QAPI directive to forcibly associate that definition with a given
namespace.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250313044312.189276-5-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-14 07:31:57 +01:00
John Snow
74d40b011c docs/qapi_domain: add namespace support to FQN
This patch adds a namespace component to the "Fully Qualified Name", in
the form of "domain:module.name". As there are no namespace directives
or options yet, this component will simply be empty as of this patch.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250313044312.189276-4-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-14 07:31:56 +01:00
John Snow
e36afc7bcc docs/qapi-domain: always store fully qualified name in signode
Currently, only the definition name is stored in the tree metadata; but
the node property is confusingly called "fullname". Rectify this by
always storing the FQN in the tree metadata.

... While we're here, re-organize the code in preparation for namespace
support to make it a bit easier to add additional components of the
FQN. With this change, there is now extremely little code left that's
taken directly from the Python domain :)

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250313044312.189276-3-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-14 07:31:56 +01:00
John Snow
8fad366260 docs/qapi_domain: isolate TYPE_CHECKING imports
When using the annotations feature, type hints do not need to be
imported at runtime, only at type check time. Move type-check-only
imports into a conditional to reduce the number of imports needed at
runtime.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250313044312.189276-2-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-14 07:31:56 +01:00
John Snow
565274da10 docs/qapidoc: generate entries for undocumented members
Presently, we never have any empty text entries for members. The next
patch will explicitly generate such sections, so enable support for it
in advance.

The parser will generate placeholder sections to indicate undocumented
members, but it's the qapidoc generator that's responsible for deciding
what to do with that stub section.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-59-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
[Tweak the stub section text]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:26:52 +01:00
John Snow
1884492e64 docs/qapidoc: Add "the members of" pointers
Add "the members of ..." pointers to Members and Arguments lists where
appropriate, with clickable cross-references - so it's a slight
improvement over the old system :)

This patch is meant to be a temporary solution until we can review and
merge the inliner.

The implementation of this patch is a little bit of a hack: Sphinx is
not designed to allow you to mix fields of different "type"; i.e. mixing
member descriptions and free-form text under the same heading. To
accomplish this with a minimum of hackery, we technically document a
"dummy field" and then just strip off the documentation for that dummy
field in a post-processing step. We use the "q_dummy" variable for this
purpose, then strip it back out before final processing. If this
processing step should fail, you'll see warnings for a bad
cross-reference. (So if you don't see any, it must be working!)

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-58-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:26:52 +01:00
John Snow
7f6f24aaf5 docs/qapidoc: add intermediate output debugger
Add debugging output for the qapidoc transmogrifier - setting DEBUG=1
will produce .ir files (one for each qapidoc directive) that write the
generated rst file to disk to allow for easy debugging and verification
of the generated document.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-57-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:26:52 +01:00
John Snow
c9b6f98803 docs/qapidoc: process @foo into `foo`
Add support for the special QAPI doc syntax to process @references as
``preformatted text``. At the moment, there are no actual
cross-references for individual members, so there is nothing to link
against. For now, process it identically to how we did in the old
qapidoc system.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-56-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:26:52 +01:00
John Snow
5c1636f7cc docs/qapidoc: implement transmogrify() method
This is the true top-level processor for the new transmogrifier;
responsible both for generating the intermediate rST and then running
the nested parse on that generated document to produce the final
docutils tree that is then - very finally - postprocessed by sphinx for
final rendering to HTML &c.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-55-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
[Use the opportunity to move the __version__ assignment to where
PEP 8 wants it]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:26:52 +01:00
John Snow
c05de7235a docs/qapidoc: add visit_entity()
Finally, the core entry method for a qapi entity.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-54-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:26:52 +01:00
John Snow
8cb0a41490 docs/qapidoc: add visit_sections() method
Implement the actual main dispatch method that processes and handles the
list of doc sections for a given QAPI entity.

Process doc sections in strict source order. This is good; reordering
doc text is undesirable. Improvement over the old doc generator, which
can reorder doc comments that don't adhere to (largely unspoken)
conventions.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-53-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
[Commit message extended]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:26:47 +01:00
John Snow
dbf51d15fd docs/qapidoc: add visit_member() method
This method is used for generating the "members" of a wide variety of
things, including structs, unions, enums, alternates, etc. The field
name it uses to do so is dependent on the type of entity the "member"
belongs to.

Currently, IF conditionals for individual members are not handled or
rendered, a small regression from the prior documentation
generator. This will be fixed in a future patch.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-52-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
52c806cad0 docs/qapidoc: add visit_returns() method
Generates :return: fields for explicit returns statements. Note that
this does not presently handle undocumented returns, which is handled in
a later commit.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-51-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
38a349ff5b docs/qapidoc: prepare to record entity being transmogrified
Prepare to keep a record of which entity we're working on documenting
for the purposes of being able to change certain generative features
conditionally and create stronger assertions.

If you find yourself asking: "Wait, but where does the current entity
actually get recorded?!", you're right! That part comes with the
visit_entity() implementation, which gets added later.

This patch is front-loaded for the sake of type checking in the
forthcoming commits before visit_entity() is ready to be added.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-50-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
6c43b008c4 docs/qapidoc: add visit_feature() method
This adds a simple ":feat name: lorem ipsum ..." line to the generated
rST document, so at the moment it's only for "top level" features.

Features not attached directly to a QAPI definition are not currently
handled! This is a small regression over the prior documentation
generator that will be addressed in a future patch.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-49-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
604df9bb00 docs/qapidoc: add add_field() and generate_field() helper methods
These are simple rST generation methods that assist in getting the types
and formatting correct for a field list entry. add_field() is a more
raw, direct call while generate_field() is intended to be used for
generating the correct field from a member object.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-48-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
3a396a865b docs/qapidoc: add format_type() method
This method is responsible for generating a type name for a given member
with the correct annotations for the QAPI domain. Features and enums do
not *have* types, so they return None. Everything else returns the type
name with a "?" suffix if that type is optional, and ensconced in
[brackets] if it's an array type.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-47-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
e9fbf1a0c6 docs/qapidoc: add visit_errors() method
Notably, this method does not currently address the formatting issues
present with the "errors" section in QAPIDoc and just vomits the text
verbatim into the rST doc, with somewhat inconsistent results.

To be addressed in a future patch.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-46-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
56e1adf293 docs/qapidoc: add visit_paragraph() method
This transforms "formerly known as untagged sections" into our pure
intermediate rST format. These sections are already pure rST, so this
method doesn't do a whole lot except ensure appropriate newlines.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-45-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
803df114fd docs/qapidoc: add preamble() method
This method adds the options/preamble to each definition block. Notably,
:since: and :ifcond: are added, as are any "special features" such as
:deprecated: and :unstable:.

If conditionals, if attached to special features, are currently
unhandled in this patch and will be addressed at a future date. We
currently do not have any if conditionals attached to special features.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-44-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
f0b2fe99f6 docs/qapidoc: add visit_freeform() method
Add the transmogrifier implementation for converting freeform doc blocks
to rST.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-43-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
5edd7411c4 docs/qapidoc: add visit_module() method
This method annotates the start of a new module, crediting the source
location to the first line of the module file.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-41-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
bd7c1496aa docs/qapidoc: add transmogrifier class stub
Add the beginnings of the Transmogrifier class by adding the rST
conversion helpers that will be used to build the virtual rST document.

This version of the class does not actually "do anything" yet; each
individual feature is added one-at-a-time in the forthcoming commits.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-40-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
45d483a851 docs/qapidoc: Fix static typing on qapidoc.py
Now that the legacy code is factored out, fix up the typing on the
remaining code in qapidoc.py. Add a type ignore to qapi_legacy.py to
prevent the errors there from bleeding out into qapidoc.py.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-38-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
7640410d5c docs/qapidoc: split old implementation into qapidoc_legacy.py
This is being done primarily to be able to type check and delint the new
implementation without needing to worry about fixing up the old
implementation.

I'm adding the new implementation into the existing file instead of into
a new file so that when the dust settles, qapidoc.py will contain the
full history of development on this generative module.

This patch *should* be pure motion, give or take the import statements.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-37-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
7d125c339d docs/qapidoc: add transmogrifier stub
This commit adds a stubbed option to the qapi-doc directive that opts-in
to the new rST generator; the implementation of which will follow in
subsequent commits.

Once all QAPI documents have been converted, this option and the old
qapidoc implementation can be dropped.

Note that moving code outside of the try...except block has no impact
because the code moved outside of that block does not ever raise a
QAPIError.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-36-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
323c668934 qapi: clean up encoding of section kinds
We have several kinds of sections, and to tell them apart, we use
Section attribute @tag and also the section object's Python type:

              type        @tag
    untagged  Section     None
    @foo:     ArgSection  'foo'
    Returns:  Section     'Returns'
    Errors:   Section     'Errors'
    Since:    Section     'Since'
    TODO:     Section     'TODO'

Note:

* @foo can be a member or a feature description, depending on context.

* tag == 'Since' can be a Since: section or a member or feature
  description.  If it's a Section, it's the former, and if it's an
  ArgSection, it's the latter.

Clean this up as follows.  Move the member or feature name to new
ArgSection attribute @name, and replace @tag by enum @kind like this:

              type         kind     name
    untagged  Section      PLAIN
    @foo:     ArgSection   MEMBER   'foo'   if member or argument
              ArgSection   FEATURE  'foo'   if feature
    Returns:  Section      RETURNS
    Errors:   Section      ERRORS
    Since:    Section      SINCE
    TODO:     Section      TODO

The qapi-schema tests are updated to account for the new section names;
"TODO" becomes "Todo" and `None` becomes "Plain" there.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-34-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
707f2bbb78 docs/qapi-domain: Fix error context reporting in Sphinx 5.x and 6.x
Sphinx 5.3.0 to Sphinx 6.2.0 has a bug where nested content in an
ObjectDescription content block has its error position reported
incorrectly due to an oversight when they added nested section support
to this directive.

(This bug is present in Sphinx's own Python and C domains; test it
yourself by creating a py:func directive and creating a syntax error in
the directive's content block. The reporting will be incorrect.)

To avoid overriding and re-implementing the entirety of the run()
method, a workaround is employed where we parse the content block
ourselves in before_content(), then null the content block to make
Sphinx's own parsing a no-op. Then, in transform_content (which occurs
after Sphinx's nested parse), we simply swap our own parsed content tree
back in for Sphinx's.

It appears a little tricky, but it's the nicest solution I can find.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-32-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
d48a8f8de3 docs/qapi-domain: warn when QAPI domain xrefs fail to resolve
This patch adds a warning (which is a build failure under our current
build settings) whenever a QAPI cross-reference fails to resolve.

This applies to any cross-references of the form :qapi:{role}:`foo`,
which covers all of the automatically generated references by the qapi
domain, and any such references that are manually written into the
documentation rst files.

Cross-references of the form `foo` do not use this system, but are
already configured to issue a warning (Again, a build failure) if the
cross-reference isn't found anywhere.

Adds warnings that look like the following:

docs/qapi/index.rst:48: WARNING: qapi:type reference target not found: 'footype' [ref.qapi]
docs/qapi/index.rst:50: WARNING: qapi:mod reference target not found: 'foomod' [ref.qapi]

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-31-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
a1fe2cd443 docs/qapi-domain: add XREF compatibility goop for Sphinx < 4.1
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 <jsnow@redhat.com>
Message-ID: <20250311034303.75779-30-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
03947c80ce docs/qapi-domain: add type cross-refs to field lists
This commit, finally, adds cross-referencing support to various field
lists; modeled tightly after Sphinx's own Python domain code.

Cross-referencing support is added to type names provided to :arg:,
:memb:, :returns: and :choice:.

:feat:, :error: and :value:, which do not take type names, do not
support this syntax.

The general syntax is simple:

:arg TypeName ArgName: Lorem Ipsum ...

The domain will transform TypeName into :qapi:type:`TypeName` in this
basic case, and also apply the ``literal`` decoration to indicate that
this is a type cross-reference.

For optional arguments, the special "?" suffix is used. Because "*" has
special meaning in rST that would cause parsing errors, we elect to use
"?" instead. The special syntax processing strips this character from
the end of any type name argument and will append ", optional" to the
rendered output, applying the cross-reference only to the actual type
name.

The intent here is that the actual syntax in doc-blocks need not change;
but e.g. qapidoc.py will need to process and transform "@arg foo lorem
ipsum" into ":arg type? foo: lorem ipsum" based on the schema
information. Therefore, nobody should ever actually witness this
intermediate syntax unless they are writing manual documentation or the
doc transmogrifier breaks.

For array arguments, type names can similarly be surrounded by "[]",
which are stripped off and then re-appended outside of the
cross-reference.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-28-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
ef137a2241 docs/qapi-domain: add warnings for malformed field lists
Normally, Sphinx will silently fall back to its standard field list
processing if it doesn't match one of your defined fields. A lot of the
time, that's not what we want - we want to be warned if we goof
something up.

For instance, the canonical argument field list form is:

:arg type name: descr

This form is captured by Sphinx and transformed so that the field label
will become "Arguments:". It's possible to omit the type name and descr
and still have it be processed correctly. However, if you omit the type
name, Sphinx no longer recognizes it:

:arg: this is not recognized.

This will turn into an arbitrary field list entry whose label is "Arg:",
and it otherwise silently fails. You may also see failures for doing
things like using :values: instead of :value:, or :errors: instead of
:error:, and so on. It's also case sensitive, and easy to trip up.

Add a validator that guarantees all field list entries that are the
direct child of an ObjectDescription use only recognized forms of field
lists, and emit a warning (treated as error by default in most build
configurations) whenever we detect one that is goofed up.

However, there's still benefit to allowing arbitrary fields -- they are
after all not a Sphinx invention, but perfectly normal docutils
syntax. Create an allow list for known spellings we don't mind letting
through, but warn against anything else.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-27-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
6a41330206 docs/qapi-domain: add :ifcond: directive option
Add a special :ifcond: option that allows us to annotate the
definition-level conditionals.

The syntax of the argument is currently undefined, but it's possible we
can apply better formatting in the future. Currently, we just display
the ifcond string as preformatted text.

Signed-off-by: Harmonie Snow <harmonie@gmail.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-26-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
d25808c2bc docs/qapi-domain: add :unstable: directive option
Although "unstable" is a feature (and *will* appear in the features
list), add a special :unstable: option to generate an eye-catch that
makes this information very hard to miss.

The forthcoming Transmogrifier in qapidoc.py will add this option
whenever it detects that the features list attached to a definition
contains the "unstable" entry.

Signed-off-by: Harmonie Snow <harmonie@gmail.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-25-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:57 +01:00
John Snow
1a0c090a5b docs/qapi-domain: add :deprecated: directive option
Although "deprecated" is a feature (and *will* appear in the features
list), add a special :deprecated: option to generate an eye-catch that
makes this information very hard to miss.

The forthcoming Transmogrifier in qapidoc.py will add this option
whenever it detects that the features list attached to a definition
contains the "deprecated" entry.

P.S., I outsourced the CSS ;)

Signed-off-by: Harmonie Snow <harmonie@gmail.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-24-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:56 +01:00
John Snow
3fe3349d23 docs/qapi-domain: add qapi:object directive
Adds the .. qapi:object:: directive, object, and :qapi:obj:`name`
cross-referencing role. This directive is meant to document both structs
and unions.

As per usual, QAPI cross-referencing for types in the member field list
will be added in a forthcoming commit.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-23-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:56 +01:00
John Snow
6d5f6f69ca docs/qapi-domain: add qapi:event directive
Adds the .. qapi:event:: directive, object, and :qapi:event:`name`
cross-referencing role.

Adds the :memb type name: field list syntax for documenting event data
members. As this syntax and phrasing will be shared with Structs and
Unions as well, add the field list definition to a shared abstract
class.

As per usual, QAPI cross-referencing for types in the member field list
will be added in a forthcoming commit.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-22-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:56 +01:00
John Snow
bac3f1313c docs/qapi-domain: add qapi:alternate directive
Add the .. qapi:alternate:: directive, object, and qapi:alt:`name`
cross-reference role.

Add the "Alternatives:" field list for describing alternate choices. Like
other field lists that reference QAPI types, a forthcoming commit will
add cross-referencing support to this field.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-21-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:56 +01:00
John Snow
902c9b0e34 docs/qapi-domain: add qapi:enum directive
Add the .. qapi:enum:: directive, object, and :qapi:enum:`name`
cross-reference role.

Add the :value name: field list for documenting Enum values.

Of note, also introduce a new "type" role that is intended to be used by
other QAPI object directives to cross-reference arbitrary QAPI type
names, but will exclude commands, events, and modules from
consideration.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-20-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:56 +01:00
John Snow
8b77f8d573 docs/qapi-domain: add "Return:" field lists
Add "Return:" field list syntax to QAPI Commands.

Like "Arguments:" and "Errors:", the type name isn't currently processed
for cross-referencing, but this will be addressed in a forthcoming
commit.

The syntax of the new field is:

:return TypeName: description
   description cont'd

This patch adds "Return" as a GroupedField, which means that multiple
return values can be annotated - this is only done because Sphinx does
not support mandatory type arguments to Ungrouped fields. Because we
want to cross-reference this type information later, we want to make the
type argument mandatory. As a result, you can technically add multiple
:return: fields, though I'm not aware of any circumstance in which you'd
need or want to. Recommendation: "Don't do that, then." The forthcoming
QAPIDoc transmogrifier does not, in fact, ever "do that".

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-19-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:56 +01:00
John Snow
9605c20477 docs/qapi-domain: add "Errors:" field lists
``:error: descr`` can now be used to document error conditions. The
format of the description is not defined here; so the ability to name
specific types is left to the document writer.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-18-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:56 +01:00
John Snow
3d9a23f92f docs/qapi-domain: add "Features:" field lists
Add support for Features field lists. There is no QAPI-specific
functionality here, but this could be changed if desired (if we wanted
the feature names to link somewhere, for instance.)

This feature list doesn't have any restrictions, so it can be used to
document object-wide features or per-member features as deemed
appropriate. It's essentially free-form text.

The syntax for this field is:

:feat name: description
    description cont'd

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-17-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:56 +01:00
John Snow
618379701b docs/qapi-domain: add "Arguments:" field lists
This adds special rendering for Sphinx's typed info field lists.

This patch does not add any QAPI-aware markup, rendering, or
cross-referencing for the type names, yet. That feature requires a
subclass to TypedField which will happen in its own commit quite a bit
later in this series; after all the basic fields and objects have been
established first.

The syntax for this field is:

:arg type name: description
   description cont'd

You can omit the type or the description. You should not omit the name;
if you do so, it degenerates into a "normal field list" entry, and
probably isn't what you want.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-16-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:10:48 +01:00