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* qapi: Fix doc comment checking for commands and eventsMarkus Armbruster2019-10-291-2/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a command's 'data' is an object, its doc comment describes the arguments defined there. When 'data' names a type, the doc comment does not describe arguments. Instead, the doc generator inserts a pointer to the named type. An event's doc comment works the same. We don't actually check doc comments for commands and events. Instead, QAPISchema._def_command() forwards the doc comment to the implicit argument type, where it gets checked. Works because the check only cares for the implicit argument type's members. Not only is this needlessly hard to understand, it actually falls apart in two cases: * When 'data' is empty, there is nothing to forward to, and the doc comment remains unchecked. Demonstrated by test doc-bad-event-arg. * When 'data' names a type, we can't forward, as the type has its own doc comment. The command or event's doc comment remains unchecked. Demonstrated by test doc-bad-boxed-command-arg. The forwarding goes back to commit 069fb5b250 "qapi: Prepare for requiring more complete documentation", put to use in commit 816a57cd6e "qapi: Fix detection of bogus member documentation". That fix was incomplete. To fix this, make QAPISchemaCommand and QAPISchemaEvent check doc comments, and drop the forwarding of doc comments to implicit argument types. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20191024110237.30963-12-armbru@redhat.com>
* qapi: Clean up doc comment checking for implicit union baseMarkus Armbruster2019-10-291-11/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | An object type's doc comment describes the type's members, less the ones defined in a named base type. Cases: * Struct: the members are defined in 'data' and inherited from 'base'. Since the base type cannot be implicit, the doc comment describes just 'data'. * Simple union: the only member is the implicit tag member @type, and the doc comment describes it. * Flat union with implicit base type: the members are defined in 'base', and the doc comment describes it. * Flat union with named base type: the members are inherited from 'base'. The doc comment describes no members. Before we can check a doc comment with .check_doc(), we need .connect_doc() connect each of its "argument sections" to the member it documents. For structs and simple unions, this is straightforward: the members in question are in .local_members, and .connect_doc() connects them. For flat unions with a named base type, it's trivial: .local_members is empty, and .connect_doc() does nothing. For flat unions with an implicit base type, it's tricky. We have QAPISchema._make_implicit_object_type() forward the union's doc comment to the implicit base type, so that the base type's .connect_doc() connects the members. The union's .connect_doc() does nothing, as .local_members is empty. Dirt effect: we check the doc comment twice, once for the union type, and once for the implicit base type. This is needlessly brittle and hard to understand. Clean up as follows. Make the union's .connect_doc() connect an implicit base's members itself. Do not forward the union's doc comment to its implicit base type. Requires extending .connect_doc() so it can work with a doc comment other than self.doc. Add an optional argument for that. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20191024110237.30963-11-armbru@redhat.com>
* qapi: Fix enum doc comment checkingMarkus Armbruster2019-10-291-0/+4
| | | | | | | | | | | Enumeration type documentation comments are not checked, as demonstrated by test doc-bad-enum-member. This is because we neglect to call self.doc.check() for enumeration types. Messed up in 816a57cd6e "qapi: Fix detection of bogus member documentation". Fix it. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20191024110237.30963-10-armbru@redhat.com>
* qapi: Split .connect_doc(), .check_doc() off .check()Markus Armbruster2019-10-291-7/+27
| | | | | | | | | Splitting documentation checking off the .check() methods makes them a bit more focused, which is welcome, as some of them are pretty big. It also prepares the ground for the following commits. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20191024110237.30963-9-armbru@redhat.com>
* qapi: Add feature flags to commandsPeter Krempa2019-10-221-4/+18
| | | | | | | | | | | | | | Similarly to features for struct types introduce the feature flags also for commands. This will allow notifying management layers of fixes and compatible changes in the behaviour of a command which may not be detectable any other way. The changes were heavily inspired by commit 6a8c0b51025. Signed-off-by: Peter Krempa <pkrempa@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20191018081454.21369-3-armbru@redhat.com>
* qapi: Split up scripts/qapi/common.pyMarkus Armbruster2019-10-221-0/+1043
The QAPI code generator clocks in at some 3100 SLOC in 8 source files. Almost 60% of the code is in qapi/common.py. Split it into more focused modules: * Move QAPISchemaPragma and QAPISourceInfo to qapi/source.py. * Move QAPIError and its sub-classes to qapi/error.py. * Move QAPISchemaParser and QAPIDoc to parser.py. Use the opportunity to put QAPISchemaParser first. * Move check_expr() & friends to qapi/expr.py. Use the opportunity to put the code into a more sensible order. * Move QAPISchema & friends to qapi/schema.py * Move QAPIGen and its sub-classes, ifcontext, QAPISchemaModularCVisitor, and QAPISchemaModularCVisitor to qapi/gen.py * Delete camel_case(), it's unused since commit e98859a9b9 "qapi: Clean up after recent conversions to QAPISchemaVisitor" A number of helper functions remain in qapi/common.py. I considered moving the code generator helpers to qapi/gen.py, but decided not to. Perhaps we should rewrite them as methods of QAPIGen some day. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20191018074345.24034-7-armbru@redhat.com> [Add "# -*- coding: utf-8 -*-" lines]