qapi: Improve reporting of missing / unknown definition keys

Have check_exprs() call check_keys() later, so its error messages gain
an "in definition" line.

Both check_keys() and check_name_is_str() check the definition's name
is a string.  Since check_keys() now runs after check_name_is_str()
rather than before, its check is dead.  Bury it.  Checking values in
check_keys() is unclean anyway.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190927134639.4284-21-armbru@redhat.com>

scripts/qapi/common.py

@@ -910,8 +910,6 @@ def pprint(elems):
 
 def check_keys(expr, info, meta, required, optional=[]):
     name = expr[meta]
-    if not isinstance(name, str):
-        raise QAPISemError(info, "'%s' key must have a string value" % meta)
     required = required + [meta]
     source = "%s '%s'" % (meta, name)
     check_known_keys(expr, info, source, required, optional)
@@ -969,37 +967,18 @@ def check_exprs(exprs):
 
         if 'enum' in expr:
             meta = 'enum'
-            check_keys(expr, info, 'enum', ['data'], ['if', 'prefix'])
-            normalize_enum(expr)
         elif 'union' in expr:
             meta = 'union'
-            check_keys(expr, info, 'union', ['data'],
-                       ['base', 'discriminator', 'if'])
-            normalize_members(expr.get('base'))
-            normalize_members(expr['data'])
         elif 'alternate' in expr:
             meta = 'alternate'
-            check_keys(expr, info, 'alternate', ['data'], ['if'])
-            normalize_members(expr['data'])
         elif 'struct' in expr:
             meta = 'struct'
-            check_keys(expr, info, 'struct', ['data'],
-                       ['base', 'if', 'features'])
-            normalize_members(expr['data'])
-            normalize_features(expr.get('features'))
         elif 'command' in expr:
             meta = 'command'
-            check_keys(expr, info, 'command', [],
-                       ['data', 'returns', 'gen', 'success-response',
-                        'boxed', 'allow-oob', 'allow-preconfig', 'if'])
-            normalize_members(expr.get('data'))
         elif 'event' in expr:
             meta = 'event'
-            check_keys(expr, info, 'event', [], ['data', 'boxed', 'if'])
-            normalize_members(expr.get('data'))
         else:
             raise QAPISemError(info, "expression is missing metatype")
-        normalize_if(expr)
 
         name = expr[meta]
         check_name_is_str(name, info, "'%s'" % meta)
@@ -1013,20 +992,39 @@ def check_exprs(exprs):
                 % (name, doc.symbol))
 
         if meta == 'enum':
+            check_keys(expr, info, 'enum', ['data'], ['if', 'prefix'])
+            normalize_enum(expr)
             check_enum(expr, info)
         elif meta == 'union':
+            check_keys(expr, info, 'union', ['data'],
+                       ['base', 'discriminator', 'if'])
+            normalize_members(expr.get('base'))
+            normalize_members(expr['data'])
             check_union(expr, info)
         elif meta == 'alternate':
+            check_keys(expr, info, 'alternate', ['data'], ['if'])
+            normalize_members(expr['data'])
             check_alternate(expr, info)
         elif meta == 'struct':
+            check_keys(expr, info, 'struct', ['data'],
+                       ['base', 'if', 'features'])
+            normalize_members(expr['data'])
+            normalize_features(expr.get('features'))
             check_struct(expr, info)
         elif meta == 'command':
+            check_keys(expr, info, 'command', [],
+                       ['data', 'returns', 'gen', 'success-response',
+                        'boxed', 'allow-oob', 'allow-preconfig', 'if'])
+            normalize_members(expr.get('data'))
             check_command(expr, info)
         elif meta == 'event':
+            check_keys(expr, info, 'event', [], ['data', 'boxed', 'if'])
+            normalize_members(expr.get('data'))
             check_event(expr, info)
         else:
             assert False, 'unexpected meta type'
 
+        normalize_if(expr)
         check_if(expr, info)
         check_flags(expr, info)
 

tests/qapi-schema/alternate-base.err

@@ -1,2 +1,3 @@
+tests/qapi-schema/alternate-base.json: In alternate 'Alt':
 tests/qapi-schema/alternate-base.json:4: unknown key 'base' in alternate 'Alt'
 Valid keys are 'alternate', 'data', 'if'.

tests/qapi-schema/bad-type-bool.err

@@ -1 +1 @@
-tests/qapi-schema/bad-type-bool.json:2: 'struct' key must have a string value
+tests/qapi-schema/bad-type-bool.json:2: 'struct' requires a string name

tests/qapi-schema/bad-type-dict.err

@@ -1 +1 @@
-tests/qapi-schema/bad-type-dict.json:2: 'command' key must have a string value
+tests/qapi-schema/bad-type-dict.json:2: 'command' requires a string name

tests/qapi-schema/double-type.err

@@ -1,2 +1,3 @@
+tests/qapi-schema/double-type.json: In struct 'bar':
 tests/qapi-schema/double-type.json:2: unknown key 'command' in struct 'bar'
 Valid keys are 'base', 'data', 'features', 'if', 'struct'.

tests/qapi-schema/enum-missing-data.err

@@ -1 +1,2 @@
+tests/qapi-schema/enum-missing-data.json: In enum 'MyEnum':
 tests/qapi-schema/enum-missing-data.json:2: key 'data' is missing from enum 'MyEnum'

tests/qapi-schema/unknown-expr-key.err

@@ -1,2 +1,3 @@
+tests/qapi-schema/unknown-expr-key.json: In struct 'bar':
 tests/qapi-schema/unknown-expr-key.json:2: unknown keys 'bogus', 'phony' in struct 'bar'
 Valid keys are 'base', 'data', 'features', 'if', 'struct'.