Commit Graph

390 Commits

Author SHA1 Message Date
John Snow
3c5f6114d9 qapi: remove "Example" doc section
Fully eliminate the "Example" sections in QAPI doc blocks now that they
have all been converted to arbitrary rST syntax using the
".. qmp-example::" directive. Update tests to match.

Migrating to the new syntax
---------------------------

The old "Example:" or "Examples:" section syntax is now caught as an
error, but "Example::" is stil permitted as explicit rST syntax for an
un-lexed, generic preformatted text block.

('Example' is not special in this case, any sentence that ends with "::"
will start an indented code block in rST.)

Arbitrary rST for Examples is now possible, but it's strongly
recommended that documentation authors use the ".. qmp-example::"
directive for consistent visual formatting in rendered HTML docs. The
":title:" directive option may be used to add extra information into the
title bar for the example. The ":annotated:" option can be used to write
arbitrary rST instead, with nested "::" blocks applying QMP formatting
where desired.

Other choices available are ".. code-block:: QMP" which will not create
an "Example:" box, or the short-form "::" code-block syntax which will
not apply QMP highlighting when used outside of the qmp-example
directive.

Why?
----

This patch has several benefits:

1. Example sections can now be written more arbitrarily, mixing
   explanatory paragraphs and code blocks however desired.

2. Example sections can now use fully arbitrary rST.

3. All code blocks are now lexed and validated as QMP; increasing
   usability of the docs and ensuring validity of example snippets.

   (To some extent - This patch only gaurantees it lexes correctly, not
   that it's valid under the JSON or QMP grammars. It will catch most
   small mistakes, however.)

4. Each qmp-example can be titled or annotated independently without
   bypassing the QMP lexer/validator.

   (i.e. code blocks are now for *code* only, so we don't have to
   sacrifice exposition for having lexically valid examples.)

NOTE: As with the "Notes" conversion (d461c27973), this patch (and the
      three preceding) may change the rendering order for Examples in
      the current generator. The forthcoming qapidoc rewrite will fix
      this by always generating documentation in source order.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20240717021312.606116-10-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2024-07-17 10:20:54 +02:00
John Snow
65fa48c79f qapi/parser: don't parse rST markup as section headers
The double-colon synax is rST formatting that precedes a literal code
block. We do not want to capture these as QAPI-specific sections.

Coerce blocks that start with e.g. "Example::" to be parsed as untagged
paragraphs instead of special tagged sections.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20240626222128.406106-14-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Indentation tweaked for consistency]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2024-07-06 08:58:24 +02:00
John Snow
d461c27973 qapi: convert "Note" sections to plain rST
We do not need a dedicated section for notes. By eliminating a specially
parsed section, these notes can be treated as normal rST paragraphs in
the new QMP reference manual, and can be placed and styled much more
flexibly.

Convert all existing "Note" and "Notes" sections to pure rST. As part of
the conversion, capitalize the first letter of each sentence and add
trailing punctuation where appropriate to ensure notes look sensible and
consistent in rendered HTML documentation. Markup is also re-aligned to
the de-facto standard of 3 spaces for directives.

Update docs/devel/qapi-code-gen.rst to reflect the new paradigm, and
update the QAPI parser to prohibit "Note" sections while suggesting a
new syntax. The exact formatting to use is a matter of taste, but a good
candidate is simply:

.. note:: lorem ipsum ...
   ... dolor sit amet ...
   ... consectetur adipiscing elit ...

... but there are other choices, too. The Sphinx readthedocs theme
offers theming for the following forms (capitalization unimportant); all
are adorned with a (!) symbol () in the title bar for rendered HTML
docs.

See
https://sphinx-rtd-theme.readthedocs.io/en/stable/demo/demo.html#admonitions
for examples of each directive/admonition in use.

These are rendered in orange:

.. Attention:: ...
.. Caution:: ...
.. WARNING:: ...

These are rendered in red:

.. DANGER:: ...
.. Error:: ...

These are rendered in green:

.. Hint:: ...
.. Important:: ...
.. Tip:: ...

These are rendered in blue:

.. Note:: ...
.. admonition:: custom title

   admonition body text

This patch uses ".. note::" almost everywhere, with just two "caution"
directives. Several instances of "Notes:" have been converted to
merely ".. note::", or multiple ".. note::" where appropriate.
".. admonition:: notes" is used in a few places where we had an
ordered list of multiple notes that would not make sense as
standalone/separate admonitions.  Two "Note:" following "Example:"
have been turned into ordinary paragraphs within the example.

NOTE: Because qapidoc.py does not attempt to preserve source ordering of
sections, the conversion of Notes from a "tagged section" to an
"untagged section" means that rendering order for some notes *may
change* as a result of this patch. The forthcoming qapidoc.py rewrite
strictly preserves source ordering in the rendered documentation, so
this issue will be rectified in the new generator.

Signed-off-by: John Snow <jsnow@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com> [for block*.json]
Message-ID: <20240626222128.406106-11-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Commit message clarified slightly, period added to one more note]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2024-07-06 08:58:24 +02:00
John Snow
83deda8769 qapi/parser: fix comment parsing immediately following a doc block
If a comment immediately follows a doc block, the parser doesn't ignore
that token appropriately. Fix that.

e.g.

> ##
> # = Hello World!
> ##
>
> # I'm a comment!

will break the parser, because it does not properly ignore the comment
token if it immediately follows a doc block.

Fixes: 3d035cd2cc (qapi: Rewrite doc comment parser)
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240626222128.406106-7-jsnow@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2024-07-06 08:58:24 +02:00
John Snow
939c639e1d qapi/parser: preserve indentation in QAPIDoc sections
Change get_doc_indented() to preserve indentation on all subsequent text
lines, and create a compatibility dedent() function for qapidoc.py that
removes indentation the same way get_doc_indented() did.

This is being done for the benefit of a new qapidoc generator which
requires that indentation in argument and features sections are
preserved.

Prior to this patch, a section like this:

```
@name: lorem ipsum
   dolor sit amet
     consectetur adipiscing elit
```

would have its body text be parsed into:

```
lorem ipsum
dolor sit amet
  consectetur adipiscing elit
```

We want to preserve the indentation for even the first body line so that
the entire block can be parsed directly as rST. This patch would now
parse that segment into:

```
lorem ipsum
   dolor sit amet
     consectetur adipiscing elit
```

This is helpful for formatting arguments and features as field lists in
rST, where the new generator will format this information as:

```
:arg type name: lorem ipsum
   dolor sit amet
     consectetur apidiscing elit
```

...and can be formed by the simple concatenation of the field list
construct and the body text. The indents help preserve the continuation
of a block-level element, and further allow the use of additional rST
block-level constructs such as code blocks, lists, and other such
markup.

This understandably breaks the existing qapidoc.py; so a new function is
added there to dedent the text for compatibility. Once the new generator
is merged, this function will not be needed any longer and can be
dropped.

I verified this patch changes absolutely nothing by comparing the
md5sums of the QMP ref html pages both before and after the change, so
it's certified inert. QAPI test output has been updated to reflect the
new strategy of preserving indents for rST.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240626222128.406106-6-jsnow@redhat.com>
[Lost commit message paragraph restored]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2024-07-06 08:58:24 +02:00
Markus Armbruster
41d0ad1d04 qapi: Rename visitor parameter @variants to @alternatives
A previous commit narrowed the type of .visit_alternate_type()
parameter @variants from QAPISchemaVariants to QAPISchemaAlternatives.
Rename it to @alternatives.

One of them passes @alternatives to helper function
gen_visit_alternate().  Rename its @variants parameter to
@alternatives as well.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
2024-05-06 12:38:27 +02:00
Markus Armbruster
d1da8af897 qapi: Rename visitor parameter @variants to @branches
The previous commit narrowed the type of .visit_object_type()
parameter @variants from QAPISchemaVariants to QAPISchemaBranches.
Rename it to @branches.

Same for .visit_object_type_flat().

A few of these pass @branches to helper functions:
QAPISchemaGenRSTVisitor.visit_object_type() to ._nodes_for_members()
and ._nodes_for_variant_when(), and
QAPISchemaGenVisitVisitor.visit_object_type() to
gen_visit_object_members().  Rename the helpers' @variants parameters
to @branches as well.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
2024-05-06 12:38:27 +02:00
Markus Armbruster
e1f684ea2e qapi: Reject "Returns" section when command doesn't return anything
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240227113921.236097-14-armbru@redhat.com>
2024-03-04 07:12:40 +01:00
Markus Armbruster
3a025d3d1f qapi: New documentation section tag "Errors"
We use section "Returns" for documenting both success and error
response of commands.

I intend to generate better command success response documentation.
Easier when "Returns" documents just he success response.

Create new section tag "Errors".  The next two commits will move error
response documentation from "Returns" sections to "Errors" sections.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240227113921.236097-4-armbru@redhat.com>
2024-03-04 07:12:40 +01:00
Markus Armbruster
51e97c14fb qapi: Slightly clearer error message for invalid "Returns" section
Change "'Returns:' is only valid for commands" to "'Returns' section
is only valid for commands".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240227113921.236097-3-armbru@redhat.com>
2024-03-04 07:12:40 +01:00
Markus Armbruster
adb0193b90 qapi: Divorce QAPIDoc from QAPIParseError
QAPIDoc stores a reference to QAPIParser just to pass it to
QAPIParseError.  The resulting error position depends on the state of
the parser.  It happens to be the current comment line.  Servicable,
but action at a distance.

The commit before previous moved most uses of QAPIParseError from
QAPIDoc to QAPIParser.  There are just three left.  Convert them to
QAPISemError.  This involves passing info to a few methods.  Then drop
the reference to QAPIParser.

The three errors lose the column number.  Not really interesting here:
it's the comment line's indentation.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240216145841.2099240-17-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26 10:43:56 +01:00
Markus Armbruster
629c5075aa qapi: Reject multiple and empty feature descriptions
The parser recognizes only the first "Features:" line.  Any subsequent
ones are treated as ordinary text, as visible in test case
doc-duplicate-features.  Recognize "Features:" lines anywhere.  A
second one is an error.

A 'Features:' line without any features is useless, but not an error.
Make it an error.  This makes detecting a second "Features:" line
easier.

qapi/run-state.json actually has an instance of this since commit
fe17522d85 (qapi: Remove deprecated 'singlestep' member of
StatusInfo).  Clean it up.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240216145841.2099240-16-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26 10:43:56 +01:00
Markus Armbruster
0b82a7440c qapi: Merge adjacent untagged sections
The parser mostly doesn't create adjacent untagged sections, and
merging the ones it does create is hardly worth the bother.  I'm doing
it to avoid behavioral change in the next commit.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240216145841.2099240-14-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26 10:43:56 +01:00
Markus Armbruster
66227e9047 qapi: Recognize section tags and 'Features:' only after blank line
Putting a blank line before section tags and 'Features:' is good,
existing practice.  Enforce it.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240216145841.2099240-12-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26 10:43:56 +01:00
Markus Armbruster
d23055b8db qapi: Require descriptions and tagged sections to be indented
By convention, we indent the second and subsequent lines of
descriptions and tagged sections, except for examples.

Turn this into a hard rule, and apply it to examples, too.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240216145841.2099240-11-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
[Straightforward conflicts in qapi/migration.json resolved]
2024-02-26 10:43:56 +01:00
Markus Armbruster
56c64dd60a qapi: Reject section heading in the middle of a doc comment
docs/devel/qapi-code-gen.txt claims "A heading line must be the first
line of the documentation comment block" since commit
55ec69f8b1 (docs/devel/qapi-code-gen.txt: Update to new rST backend
conventions).  Not true, we have code to make it work anywhere in a
free-form doc comment: commit dcdc07a97c (qapi: Make section headings
start a new doc comment block).

Make it true, for simplicity's sake.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240216145841.2099240-10-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26 10:43:56 +01:00
Markus Armbruster
31c54b92ad qapi: Rename QAPIDoc.Section.name to .tag
Since the previous commit, QAPIDoc.Section.name is either
None (untagged section) or the section's tag string ('Returns',
'@name', ...).  Rename it to .tag.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240216145841.2099240-9-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26 10:43:56 +01:00
Markus Armbruster
573e2223f9 qapi: Improve error message for empty doc sections
Improve the message for an empty tagged section from

    empty doc section 'Note'

to

    text required after 'Note:'

and the message for an empty argument or feature description from

    empty doc section 'foo'

to

    text required after '@foo:'

Improve the error position to refer to the beginning of the empty
section instead of its end.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240216145841.2099240-8-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26 10:43:56 +01:00
Markus Armbruster
bf00dc19f3 qapi: Improve error position for bogus invalid "Returns" section
When something other than a command has a "Returns" section, the error
message points to the beginning of the definition comment.  Point to
the "Returns" section instead.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240216145841.2099240-7-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26 10:43:56 +01:00
Markus Armbruster
15333abed9 qapi: Improve error position for bogus argument descriptions
When documented arguments don't exist, the error message points to the
beginning of the definition comment.  Point to the first bogus
argument description instead.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240216145841.2099240-6-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26 10:43:56 +01:00
Markus Armbruster
0ba2915b92 tests/qapi-schema: Cover 'Features:' not followed by descriptions
A 'Features:' line without any features is useless, but not an error
now.  However, a later commit will make it one, because that makes
rejecting duplicate 'Features:' easier.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240216145841.2099240-4-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26 10:43:56 +01:00
Markus Armbruster
fc68b9ffc9 tests/qapi-schema: Cover duplicate 'Features:' line
We don't actually recognize the second 'Features:' line.  Instead, we
treat it as an untagged section.

If it was followed by feature description, we'd reject that like
"description of '@feat2:' follows a section".  Less than clear.

To be improved shortly.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240216145841.2099240-3-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26 10:43:56 +01:00
Markus Armbruster
976474fdb2 tests/qapi-schema: Fix test 'QAPI rST doc'
The test compares Sphinx plain-text output against a golden reference.
To work on Windows hosts, it filters out carriage returns in both
files.  Unfortunately, the filter doesn't work: it creates an empty
file.  Comparing empty files always succeeds.

Fix the filter, and update the golden reference to current Sphinx
output.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240216145841.2099240-2-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26 10:43:56 +01:00
Markus Armbruster
0cec50119f qapi: Require member documentation (with loophole)
The QAPI generator forces you to document your stuff.  Except for
command arguments, event data, and members of enum and object types:
these the generator silently "documents" as "Not documented".

We can't require proper documentation there without first fixing all
the offenders.  We've always had too many offenders to pull that off.
Right now, we have more than 500.  Worse, we seem to fix old ones no
faster than we add new ones: in the past year, we fixed 22 ones, but
added 26 new ones.

To help arrest the backsliding, make missing documentation an error
unless the command, type, or event is in listed in new pragma
documentation-exceptions.

List all the current offenders: 117 commands and types in qapi/, and 9
in qga/.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240205074709.3613229-7-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-12 10:04:31 +01:00
Markus Armbruster
1ed1d4d608 qapi: Indent tagged doc comment sections properly
docs/devel/qapi-code-gen demands that the "second and subsequent lines
of sections other than "Example"/"Examples" should be indented".
Commit a937b6aa739q (qapi: Reformat doc comments to conform to current
conventions) missed a few instances, and messed up a few others.
Clean that up.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240205074709.3613229-5-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-12 10:04:31 +01:00
Markus Armbruster
5c24c3e2f3 tests/qapi-schema: Tidy up pylint warnings and advice
Pylint warns:

    tests/qapi-schema/test-qapi.py:139:13: W1514: Using open without explicitly specifying an encoding (unspecified-encoding)
    tests/qapi-schema/test-qapi.py:143:13: W1514: Using open without explicitly specifying an encoding (unspecified-encoding)

Add encoding='utf-8'.

Pylint advises:

    tests/qapi-schema/test-qapi.py:143:13: R1732: Consider using 'with' for resource-allocating operations (consider-using-with)

Silence this by returning the value directly.

Pylint advises:

    tests/qapi-schema/test-qapi.py:221:4: R1722: Consider using sys.exit() (consider-using-sys-exit)
    tests/qapi-schema/test-qapi.py:226:4: R1722: Consider using sys.exit() (consider-using-sys-exit)

Sure, why not.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20231025092925.1785934-1-armbru@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
2023-11-13 10:36:51 +01:00
Michael Tokarev
96420a30e0 tests/: spelling fixes
with some rewording in
 tests/qemu-iotests/298
 tests/qtest/fuzz/generic_fuzz.c
 tests/unit/test-throttle.c
as suggested by Eric.

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Eric Blake <eblake@redhat.com>
2023-09-08 13:08:52 +03:00
Markus Armbruster
290e48e8f1 qapi: Improve error message for description following section
The error message is bad when the section is untagged.  For instance,
test case doc-interleaved-section produces "'@foobar:' can't follow
'Note' section", which is okay, but if we drop the "Note:" tag, we get
"'@foobar:' can't follow 'None' section, which is bad.

Change the error message to "description of '@foobar:' follows a
section".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230510141637.3685080-1-armbru@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
[Conflict with commit 3e32dca3f0 resolved]
2023-05-22 10:03:26 +02:00
Markus Armbruster
08349786c8 qapi: Relax doc string @name: description indentation rules
The QAPI schema doc comment language provides special syntax for
command and event arguments, struct and union members, alternate
branches, enumeration values, and features: descriptions starting with
"@name:".

By convention, we format them like this:

    # @name: Lorem ipsum dolor sit amet, consectetur adipiscing elit,
    #        sed do eiusmod tempor incididunt ut labore et dolore
    #        magna aliqua.

Okay for names as short as "name", but we have much longer ones.  Their
description gets squeezed against the right margin, like this:

    # @dirty-sync-missed-zero-copy: Number of times dirty RAM synchronization could
    #                               not avoid copying dirty pages. This is between
    #                               0 and @dirty-sync-count * @multifd-channels.
    #                               (since 7.1)

The description text is effectively just 50 characters wide.  Easy
enough to read, but can be cumbersome to write.

The awkward squeeze against the right margin makes people go beyond it,
which produces two undesirables: arguments about style, and descriptions
that are unnecessarily hard to read, like this one:

    # @postcopy-vcpu-blocktime: list of the postcopy blocktime per vCPU.  This is
    #                           only present when the postcopy-blocktime migration capability
    #                           is enabled. (Since 3.0)

We could instead format it like

    # @postcopy-vcpu-blocktime:
    # list of the postcopy blocktime per vCPU.  This is only present
    # when the postcopy-blocktime migration capability is
    # enabled. (Since 3.0)

or, since the commit before previous, like

    # @postcopy-vcpu-blocktime:
    # 	  list of the postcopy blocktime per vCPU.  This is only present
    # 	  when the postcopy-blocktime migration capability is
    # 	  enabled. (Since 3.0)

However, I'd rather have

    # @postcopy-vcpu-blocktime: list of the postcopy blocktime per vCPU.
    #     This is only present when the postcopy-blocktime migration
    #     capability is enabled.  (Since 3.0)

because this is how rST field and option lists work.

To get this, we need to let the first non-blank line after the
"@name:" line determine expected indentation.

This fills up the indentation pitfall mentioned in
docs/devel/qapi-code-gen.rst.  A related pitfall still exists.  Update
the text to show it.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230428105429.1687850-14-armbru@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
[Work around lack of walrus operator in Python 3.7 and older]
2023-05-10 10:00:40 +02:00
Markus Armbruster
9b2c6746d3 qapi: Fix argument description indentation stripping
When an argument's description starts on the line after the "#arg: "
line, indentation is stripped only from the description's first line,
as demonstrated by the previous commit.  Moreover, subsequent lines
with less indentation are not rejected.

Make the first line's indentation the expected indentation for the
remainder of the description.  This fixes indentation stripping, and
also requires at least that much indentation.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230428105429.1687850-12-armbru@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
2023-05-09 09:12:48 +02:00
Markus Armbruster
a87a9b4d4f tests/qapi-schema/doc-good: Improve argument description tests
Improve the comments to better describe what they test.

Cover argument description starting on a new line indented.  This
style isn't documented in docs/devel/qapi-code-gen.rst.  qapi-gen.py
accepts it, but messes up indentation: it's stripped from the first
line, not subsequent ones.  The next commit will fix this.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230428105429.1687850-11-armbru@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
2023-05-09 09:12:43 +02:00
Markus Armbruster
5962635561 tests/qapi-schema/doc-good: Improve a comment
The QAPI generator doesn't reject undocumented members and
features (yet).  doc-good.json covers this, with clear "is
undocumented" notes to signal intent.

Except for @Variant1 member @var1, where it's "(but no @var: line)".
Less clear.  Replace by "@var1 is undocumented".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230428105429.1687850-10-armbru@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
2023-05-09 09:12:34 +02:00
Daniel P. Berrangé
a17dbc4b79 qapi: allow unions to contain further unions
This extends the QAPI schema validation to permit unions inside unions,
provided the checks for clashing fields pass.

Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20230420102619.348173-4-berrange@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2023-04-26 07:52:45 +02:00
Daniel P. Berrangé
7ce54db230 qapi: support updating expected test output via make
It is possible to pass --update to tests/qapi-schema/test-qapi.py
to make it update the output files on error. This is inconvenient
to achieve though when test-qapi.py is run indirectly by make/meson.

Instead simply allow for an env variable to be set:

 $ QAPI_TEST_UPDATE= make check-qapi-schema

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20230420102619.348173-2-berrange@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2023-04-25 15:23:06 +02:00
Markus Armbruster
de3b3f529d qapi: Require boxed for conditional command and event arguments
The C code generator fails to honor 'if' conditions of command and
event arguments.

For instance, tests/qapi-schema/qapi-schema-test.json has

    { 'event': 'TEST_IF_EVENT',
      'data': { 'foo': 'TestIfStruct',
		'bar': { 'type': ['str'], 'if': 'TEST_IF_EVT_ARG' } },
      'if': { 'all': ['TEST_IF_EVT', 'TEST_IF_STRUCT'] } }

Generated tests/test-qapi-events.h fails to honor the TEST_IF_EVT_ARG
condition:

    #if defined(TEST_IF_EVT) && defined(TEST_IF_STRUCT)
    void qapi_event_send_test_if_event(TestIfStruct *foo, strList *bar);
    #endif /* defined(TEST_IF_EVT) && defined(TEST_IF_STRUCT) */

Only uses so far are in tests/.

We could fix the generator to emit something like

    #if defined(TEST_IF_EVT) && defined(TEST_IF_STRUCT)
    void qapi_event_send_test_if_event(TestIfStruct *foo
    #if defined(TEST_IF_EVT_ARG)
                    , strList *bar
    #endif
                    );
    #endif /* defined(TEST_IF_EVT) && defined(TEST_IF_STRUCT) */

Ugly.  Calls become similarly ugly.  Not worth fixing.

Conditional arguments work fine with 'boxed': true, simply because
complex types with conditional members work fine.  Not worth breaking.

Reject conditional arguments unless boxed.

Move the tests cases covering unboxed conditional arguments out of
tests/qapi-schema/qapi-schema-test.json.  Cover boxed conditional
arguments there instead.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230316071325.492471-15-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2023-04-24 15:21:39 +02:00
Markus Armbruster
fa32eb9095 tests/qapi-schema: Cover optional conditional struct member
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230316071325.492471-13-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-04-24 15:21:39 +02:00
Markus Armbruster
39d2cc8e71 tests/qapi-schema: Clean up positive test for conditionals
Union TestIfUnion is conditional on macros TEST_IF_UNION and
TEST_IF_STRUCT.  It uses TestIfEnum, which is conditional on macro
TEST_IF_ENUM.  If TEST_IF_UNION and TEST_IF_STRUCT are defined, but
TEST_IF_ENUM isn't, the generated code won't compile.

Command test-if-cmd is conditional an macros TEST_IF_CMD and
TEST_IF_STRUCT, and uses TestIfEnum.  Similar issue.

Event TEST_IF_EVENT is conditional an macros TEST_IF_EVT and
TEST_IF_STRUCT, and uses TestIfEnum.  Similar issue.

Replace the uses of TestIfEnum in the latter two by str.

TestIfUnion is now TestIfEnum's only user.  Change TestIfEnum's
condition to TEST_IF_UNION.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230316071325.492471-12-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[Commit message corrected]
2023-04-24 15:21:39 +02:00
Markus Armbruster
40e350f0cc tests/qapi-schema: Rename a few conditionals
Positive test case

    { 'enum': 'TestIfEnum',
      'data': [ 'foo', { 'name' : 'bar', 'if': 'TEST_IF_ENUM_BAR' } ],
      'if': 'TEST_IF_ENUM' }

generates

    #if defined(TEST_IF_ENUM)
    typedef enum TestIfEnum {
	TEST_IF_ENUM_FOO,
    #if defined(TEST_IF_ENUM_BAR)
	TEST_IF_ENUM_BAR,
    #endif /* defined(TEST_IF_ENUM_BAR) */
	TEST_IF_ENUM__MAX,
    } TestIfEnum;

Macro TEST_IF_ENUM_BAR clashes with the enumeration constant.
Wouldn't compile with -DTEST_IF_BAR.

Rename the macro to TEST_IF_ENUM_MEMBER.  For consistency, rename
similar macros elsewhere as well.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230316071325.492471-11-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-04-24 15:21:39 +02:00
Markus Armbruster
8fba2f737a tests/qapi-schema: Improve union discriminator coverage
A union's 'discriminator' must name one of the common members.
QAPISchemaVariants.check() looks it up by its c_name(), then checks
the name matches exactly (because c_name() is not injective).

Tests union-base-empty and union-invalid-discriminator both cover the
case where lookup fails.  Repurpose the latter to cover the case where
it succeeds and the name check fails.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230316071325.492471-10-armbru@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
[Commit message typo fixed]
2023-04-24 15:21:39 +02:00
Markus Armbruster
e2050ef633 qapi: Fix to reject 'data': 'mumble' in struct
A struct's 'data' must be a JSON object defining the struct's members.
The QAPI code generator incorrectly accepts a JSON string instead, and
then crashes in QAPISchema._make_members() called from
._def_struct_type().

Fix to reject it: factor check_type_implicit() out of
check_type_name_or_implicit(), and switch check_struct() to use it
instead.  Also add a test case.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230316071325.492471-9-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[More detailed commit message]
2023-04-24 15:21:39 +02:00
Markus Armbruster
6f2ab6090d qapi: Fix error message when type name or array is expected
We incorrectly report "FOO should be a type name" when it could also
be an array.  Fix that.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230316071325.492471-8-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2023-04-24 15:21:39 +02:00
Markus Armbruster
2a0c975f86 qapi: Improve error message for unexpected array types
We reject array types in certain places with "cannot be an array".
Deleting this check improves the error message to "should be a type
name" or "should be an object or type name", depending on context, so
do that.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230316071325.492471-6-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-04-24 15:21:39 +02:00
Marc-André Lureau
ec91e92378 meson: replace Perl usage with Python
Let's try to remove Perl usage during build time.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20230110132700.833690-5-marcandre.lureau@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230124180127.1881110-8-alex.bennee@linaro.org>
2023-02-02 10:44:23 +00:00
Paolo Bonzini
7bef93ff06 tests/qapi-schema: remove Meson workaround
The referenced issue has been fixed since version 0.61, so remove the
workaround.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-01-06 00:51:02 +01:00
Paolo Bonzini
e3af71e900 meson: remove dead assignments
Found with "muon analyze".

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-09-01 07:42:37 +02:00
Paolo Bonzini
79db994861 qapi-schema: test: add a unit test for parsing array alternates
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20220321164243.200569-4-pbonzini@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Dead code dropped in test_visitor_in_alternate_list()]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2022-04-21 10:11:25 +02:00
Paolo Bonzini
b36dc5c279 qapi-schema: test: add a qapi-schema-test for array alternates
Check that conflicts among array alternates are detected correctly.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20220321164243.200569-3-pbonzini@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Expected test output alternate-conflict-lists.json corrected]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2022-04-21 10:11:25 +02:00
Paolo Bonzini
a58069494d qapi-schema: support alternates with array type
Detect array types as alternate branches, and turn the JSON list into
a QAPISchemaArrayType.  Array types in an alternate are represented with
QTYPE_QLIST in the type field.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20220321164243.200569-2-pbonzini@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2022-04-21 10:11:25 +02:00
Marc-André Lureau
89bcfe780a meson: drop sphinx_extn_depends
Module dependencies is now handled by depfile.py.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2021-11-08 12:27:23 +04:00
Marc-André Lureau
706bbad2ba tests/qapi-schema/meson: add depfile to sphinx doc
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2021-11-08 12:27:23 +04:00