qapi2texi: Implement boxed argument documentation

This replaces manual references like "For the arguments, see the
documentation of ..." by a generated reference "Arguments: the members
of ...".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1489582656-31133-25-git-send-email-armbru@redhat.com>

qapi-schema.json

@@ -1017,7 +1017,7 @@
 ##
 # @migrate-set-parameters:
 #
-# Set various migration parameters.  See MigrationParameters for details.
+# Set various migration parameters.
 #
 # Since: 2.4
 #

qapi/block-core.json

@@ -1341,8 +1341,6 @@
 # The operation can be stopped before it has completed using the
 # block-job-cancel command.
 #
-# For the arguments, see the documentation of DriveBackup.
-#
 # Returns: nothing on success
 #          If @device is not a valid block device, GenericError
 #
@@ -1369,8 +1367,6 @@
 # The operation can be stopped before it has completed using the
 # block-job-cancel command.
 #
-# For the arguments, see the documentation of BlockdevBackup.
-#
 # Returns: nothing on success
 #          If @device is not a valid block device, DeviceNotFound
 #
@@ -1458,8 +1454,6 @@
 # format of the mirror image, default is to probe if mode='existing',
 # else the format of the source.
 #
-# See DriveMirror for parameter descriptions
-#
 # Returns: nothing on success
 #          If @device is not a valid block device, GenericError
 #
@@ -1731,8 +1725,6 @@
 # the device will be removed from its group and the rest of its
 # members will not be affected. The 'group' parameter is ignored.
 #
-# See BlockIOThrottle for parameter descriptions.
-#
 # Returns: Nothing on success
 #          If @device is not a valid block device, DeviceNotFound
 #
@@ -2915,8 +2907,6 @@
 # BlockBackend will be created; otherwise, @node-name is mandatory at the top
 # level and no BlockBackend will be created.
 #
-# For the arguments, see the documentation of BlockdevOptions.
-#
 # Note: This command is still a work in progress.  It doesn't support all
 # block drivers among other things.  Stay away from it unless you want
 # to help with its development.

scripts/qapi2texi.py

@@ -220,9 +220,15 @@ def visit_command(self, name, info, arg_type, ret_type,
         doc = self.cur_doc
         if self.out:
             self.out += '\n'
+        if boxed:
+            body = texi_body(doc)
+            body += '\n@b{Arguments:} the members of @code{%s}' % arg_type.name
+            body += texi_sections(doc)
+        else:
+            body = texi_entity(doc, 'Arguments')
         self.out += MSG_FMT(type='Command',
                             name=doc.symbol,
-                            body=texi_entity(doc, 'Arguments'))
+                            body=body)
 
     def visit_event(self, name, info, arg_type, boxed):
         doc = self.cur_doc