Include less of the generated modular QAPI headers

In my "build everything" tree, a change to the types in
qapi-schema.json triggers a recompile of about 4800 out of 5100
objects.

The previous commit split up qmp-commands.h, qmp-event.h, qmp-visit.h,
qapi-types.h.  Each of these headers still includes all its shards.
Reduce compile time by including just the shards we actually need.

To illustrate the benefits: adding a type to qapi/migration.json now
recompiles some 2300 instead of 4800 objects.  The next commit will
improve it further.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20180211093607.27351-24-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
[eblake: rebase to master]
Signed-off-by: Eric Blake <eblake@redhat.com>

4 files changed, 25 insertions, 17 deletions

diff --git a/scripts/qapi/commands.py b/scripts/qapi/commands.py
index a43bccb190..953449171b 100644
--- a/scripts/qapi/commands.py
+++ b/scripts/qapi/commands.py
@@ -241,6 +241,9 @@ class QAPISchemaGenCommandVisitor(QAPISchemaModularCVisitor):
 
     def _begin_module(self, name):
         self._visited_ret_types[self._genc] = set()
+        commands = self._module_basename('qapi-commands', name)
+        types = self._module_basename('qapi-types', name)
+        visit = self._module_basename('qapi-visit', name)
         self._genc.add(mcgen('''
 #include "qemu/osdep.h"
 #include "qemu-common.h"
@@ -251,18 +254,17 @@ class QAPISchemaGenCommandVisitor(QAPISchemaModularCVisitor):
 #include "qapi/qobject-input-visitor.h"
 #include "qapi/dealloc-visitor.h"
 #include "qapi/error.h"
-#include "%(prefix)sqapi-types.h"
-#include "%(prefix)sqapi-visit.h"
-#include "%(prefix)sqmp-commands.h"
+#include "%(visit)s.h"
+#include "%(commands)s.h"
 
 ''',
-                             prefix=self._prefix))
+                             commands=commands, visit=visit))
         self._genh.add(mcgen('''
-#include "%(prefix)sqapi-types.h"
+#include "%(types)s.h"
 #include "qapi/qmp/dispatch.h"
 
 ''',
-                             prefix=self._prefix))
+                             types=types))
 
     def visit_end(self):
         (genc, genh) = self._module[self._main_module]
diff --git a/scripts/qapi/events.py b/scripts/qapi/events.py
index 1e0b990f35..5ad6708491 100644
--- a/scripts/qapi/events.py
+++ b/scripts/qapi/events.py
@@ -165,24 +165,26 @@ class QAPISchemaGenEventVisitor(QAPISchemaModularCVisitor):
         return basename
 
     def _begin_module(self, name):
+        types = self._module_basename('qapi-types', name)
+        visit = self._module_basename('qapi-visit', name)
         self._genc.add(mcgen('''
 #include "qemu/osdep.h"
 #include "qemu-common.h"
 #include "%(prefix)sqapi-event.h"
-#include "%(prefix)sqapi-visit.h"
+#include "%(visit)s.h"
 #include "qapi/error.h"
 #include "qapi/qmp/qdict.h"
 #include "qapi/qobject-output-visitor.h"
 #include "qapi/qmp-event.h"
 
 ''',
-                             prefix=self._prefix))
+                             visit=visit, prefix=self._prefix))
         self._genh.add(mcgen('''
 #include "qapi/util.h"
-#include "%(prefix)sqapi-types.h"
+#include "%(types)s.h"
 
 ''',
-                             prefix=self._prefix))
+                             types=types))
 
     def visit_end(self):
         self._genh.add(gen_enum(self._enum_name, self._event_names))
diff --git a/scripts/qapi/types.py b/scripts/qapi/types.py
index 59826b1162..2a3c502cf6 100644
--- a/scripts/qapi/types.py
+++ b/scripts/qapi/types.py
@@ -185,13 +185,15 @@ class QAPISchemaGenTypeVisitor(QAPISchemaModularCVisitor):
 '''))
 
     def _begin_module(self, name):
+        types = self._module_basename('qapi-types', name)
+        visit = self._module_basename('qapi-visit', name)
         self._genc.preamble_add(mcgen('''
 #include "qemu/osdep.h"
 #include "qapi/dealloc-visitor.h"
-#include "%(prefix)sqapi-types.h"
-#include "%(prefix)sqapi-visit.h"
+#include "%(types)s.h"
+#include "%(visit)s.h"
 ''',
-                                      prefix=self._prefix))
+                                      types=types, visit=visit))
         self._genh.preamble_add(mcgen('''
 #include "qapi-builtin-types.h"
 '''))
diff --git a/scripts/qapi/visit.py b/scripts/qapi/visit.py
index 9b678e7263..de09966643 100644
--- a/scripts/qapi/visit.py
+++ b/scripts/qapi/visit.py
@@ -284,20 +284,22 @@ class QAPISchemaGenVisitVisitor(QAPISchemaModularCVisitor):
                                       prefix=prefix))
 
     def _begin_module(self, name):
+        types = self._module_basename('qapi-types', name)
+        visit = self._module_basename('qapi-visit', name)
         self._genc.preamble_add(mcgen('''
 #include "qemu/osdep.h"
 #include "qemu-common.h"
 #include "qapi/error.h"
 #include "qapi/qmp/qerror.h"
-#include "%(prefix)sqapi-visit.h"
+#include "%(visit)s.h"
 ''',
-                                      prefix=self._prefix))
+                                      visit=visit, prefix=self._prefix))
         self._genh.preamble_add(mcgen('''
 #include "qapi-builtin-visit.h"
-#include "%(prefix)sqapi-types.h"
+#include "%(types)s.h"
 
 ''',
-                                      prefix=self._prefix))
+                                      types=types))
 
     def visit_enum_type(self, name, info, values, prefix):
         self._genh.add(gen_visit_decl(name, scalar=True))