qapi: Turn generators into modules

The next commit will introduce a common driver program for all
generators.  The generators need to be modules for that.  qapi2texi.py
already is.  Make the other generators follow suit.

The changes are actually trivial.  Obvious in the diffs once you view
them with whitespace changes ignored.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20180211093607.27351-8-armbru@redhat.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
[eblake: minor tweak to keep 'blurb' one line]
Signed-off-by: Eric Blake <eblake@redhat.com>

5 files changed, 143 insertions, 115 deletions

diff --git a/scripts/qapi-commands.py b/scripts/qapi-commands.py
index e75e32e489..c20b22020e 100644
--- a/scripts/qapi-commands.py
+++ b/scripts/qapi-commands.py
@@ -255,14 +255,15 @@ class QAPISchemaGenCommandVisitor(QAPISchemaVisitor):
         self._regy += gen_register_command(name, success_response)
 
 
-(input_file, output_dir, do_c, do_h, prefix, opts) = parse_command_line()
+def main(argv):
+    (input_file, output_dir, do_c, do_h, prefix, opts) = parse_command_line()
 
-blurb = ' * Schema-defined QAPI/QMP commands'
+    blurb = ' * Schema-defined QAPI/QMP commands'
 
-genc = QAPIGenC(blurb, __doc__)
-genh = QAPIGenH(blurb, __doc__)
+    genc = QAPIGenC(blurb, __doc__)
+    genh = QAPIGenH(blurb, __doc__)
 
-genc.add(mcgen('''
+    genc.add(mcgen('''
 #include "qemu/osdep.h"
 #include "qemu-common.h"
 #include "qemu/module.h"
@@ -277,23 +278,27 @@ genc.add(mcgen('''
 #include "%(prefix)sqmp-commands.h"
 
 ''',
-               prefix=prefix))
+                   prefix=prefix))
 
-genh.add(mcgen('''
+    genh.add(mcgen('''
 #include "%(prefix)sqapi-types.h"
 #include "qapi/qmp/dispatch.h"
 
 void %(c_prefix)sqmp_init_marshal(QmpCommandList *cmds);
 ''',
-               prefix=prefix, c_prefix=c_name(prefix, protect=False)))
-
-schema = QAPISchema(input_file)
-vis = QAPISchemaGenCommandVisitor(prefix)
-schema.visit(vis)
-genc.add(vis.defn)
-genh.add(vis.decl)
-
-if do_c:
-    genc.write(output_dir, prefix + 'qmp-marshal.c')
-if do_h:
-    genh.write(output_dir, prefix + 'qmp-commands.h')
+                   prefix=prefix, c_prefix=c_name(prefix, protect=False)))
+
+    schema = QAPISchema(input_file)
+    vis = QAPISchemaGenCommandVisitor(prefix)
+    schema.visit(vis)
+    genc.add(vis.defn)
+    genh.add(vis.decl)
+
+    if do_c:
+        genc.write(output_dir, prefix + 'qmp-marshal.c')
+    if do_h:
+        genh.write(output_dir, prefix + 'qmp-commands.h')
+
+
+if __name__ == '__main__':
+    main(sys.argv)
diff --git a/scripts/qapi-event.py b/scripts/qapi-event.py
index f65ccdc8ea..1f8bf62c8b 100644
--- a/scripts/qapi-event.py
+++ b/scripts/qapi-event.py
@@ -171,14 +171,15 @@ class QAPISchemaGenEventVisitor(QAPISchemaVisitor):
         self._event_names.append(name)
 
 
-(input_file, output_dir, do_c, do_h, prefix, dummy) = parse_command_line()
+def main(argv):
+    (input_file, output_dir, do_c, do_h, prefix, dummy) = parse_command_line()
 
-blurb = ' * Schema-defined QAPI/QMP events'
+    blurb = ' * Schema-defined QAPI/QMP events'
 
-genc = QAPIGenC(blurb, __doc__)
-genh = QAPIGenH(blurb, __doc__)
+    genc = QAPIGenC(blurb, __doc__)
+    genh = QAPIGenH(blurb, __doc__)
 
-genc.add(mcgen('''
+    genc.add(mcgen('''
 #include "qemu/osdep.h"
 #include "qemu-common.h"
 #include "%(prefix)sqapi-event.h"
@@ -189,22 +190,26 @@ genc.add(mcgen('''
 #include "qapi/qmp-event.h"
 
 ''',
-               prefix=prefix))
+                   prefix=prefix))
 
-genh.add(mcgen('''
+    genh.add(mcgen('''
 #include "qapi/util.h"
 #include "%(prefix)sqapi-types.h"
 
 ''',
-               prefix=prefix))
-
-schema = QAPISchema(input_file)
-vis = QAPISchemaGenEventVisitor(prefix)
-schema.visit(vis)
-genc.add(vis.defn)
-genh.add(vis.decl)
-
-if do_c:
-    genc.write(output_dir, prefix + 'qapi-event.c')
-if do_h:
-    genh.write(output_dir, prefix + 'qapi-event.h')
+                   prefix=prefix))
+
+    schema = QAPISchema(input_file)
+    vis = QAPISchemaGenEventVisitor(prefix)
+    schema.visit(vis)
+    genc.add(vis.defn)
+    genh.add(vis.decl)
+
+    if do_c:
+        genc.write(output_dir, prefix + 'qapi-event.c')
+    if do_h:
+        genh.write(output_dir, prefix + 'qapi-event.h')
+
+
+if __name__ == '__main__':
+    main(sys.argv)
diff --git a/scripts/qapi-introspect.py b/scripts/qapi-introspect.py
index 5d9a7abeb8..cac219b4d8 100644
--- a/scripts/qapi-introspect.py
+++ b/scripts/qapi-introspect.py
@@ -167,36 +167,42 @@ const char %(c_name)s[] = %(c_string)s;
         arg_type = arg_type or self._schema.the_empty_object_type
         self._gen_json(name, 'event', {'arg-type': self._use_type(arg_type)})
 
-# Debugging aid: unmask QAPI schema's type names
-# We normally mask them, because they're not QMP wire ABI
-opt_unmask = False
 
-(input_file, output_dir, do_c, do_h, prefix, opts) = \
-    parse_command_line('u', ['unmask-non-abi-names'])
+def main(argv):
+    # Debugging aid: unmask QAPI schema's type names
+    # We normally mask them, because they're not QMP wire ABI
+    opt_unmask = False
 
-for o, a in opts:
-    if o in ('-u', '--unmask-non-abi-names'):
-        opt_unmask = True
+    (input_file, output_dir, do_c, do_h, prefix, opts) = \
+        parse_command_line('u', ['unmask-non-abi-names'])
 
-blurb = ' * QAPI/QMP schema introspection'
+    for o, a in opts:
+        if o in ('-u', '--unmask-non-abi-names'):
+            opt_unmask = True
 
-genc = QAPIGenC(blurb, __doc__)
-genh = QAPIGenH(blurb, __doc__)
+    blurb = ' * QAPI/QMP schema introspection'
 
-genc.add(mcgen('''
+    genc = QAPIGenC(blurb, __doc__)
+    genh = QAPIGenH(blurb, __doc__)
+
+    genc.add(mcgen('''
 #include "qemu/osdep.h"
 #include "%(prefix)sqmp-introspect.h"
 
 ''',
-               prefix=prefix))
-
-schema = QAPISchema(input_file)
-vis = QAPISchemaGenIntrospectVisitor(prefix, opt_unmask)
-schema.visit(vis)
-genc.add(vis.defn)
-genh.add(vis.decl)
-
-if do_c:
-    genc.write(output_dir, prefix + 'qmp-introspect.c')
-if do_h:
-    genh.write(output_dir, prefix + 'qmp-introspect.h')
+                   prefix=prefix))
+
+    schema = QAPISchema(input_file)
+    vis = QAPISchemaGenIntrospectVisitor(prefix, opt_unmask)
+    schema.visit(vis)
+    genc.add(vis.defn)
+    genh.add(vis.decl)
+
+    if do_c:
+        genc.write(output_dir, prefix + 'qmp-introspect.c')
+    if do_h:
+        genh.write(output_dir, prefix + 'qmp-introspect.h')
+
+
+if __name__ == '__main__':
+    main(sys.argv)
diff --git a/scripts/qapi-types.py b/scripts/qapi-types.py
index 6ef8c40d5b..7d23544228 100644
--- a/scripts/qapi-types.py
+++ b/scripts/qapi-types.py
@@ -240,43 +240,49 @@ class QAPISchemaGenTypeVisitor(QAPISchemaVisitor):
         self.decl += gen_object(name, None, [variants.tag_member], variants)
         self._gen_type_cleanup(name)
 
-# If you link code generated from multiple schemata, you want only one
-# instance of the code for built-in types.  Generate it only when
-# opt_builtins, enabled by command line option -b.  See also
-# QAPISchemaGenTypeVisitor.visit_end().
-opt_builtins = False
 
-(input_file, output_dir, do_c, do_h, prefix, opts) = \
-    parse_command_line('b', ['builtins'])
+def main(argv):
+    # If you link code generated from multiple schemata, you want only one
+    # instance of the code for built-in types.  Generate it only when
+    # opt_builtins, enabled by command line option -b.  See also
+    # QAPISchemaGenTypeVisitor.visit_end().
+    opt_builtins = False
 
-for o, a in opts:
-    if o in ('-b', '--builtins'):
-        opt_builtins = True
+    (input_file, output_dir, do_c, do_h, prefix, opts) = \
+        parse_command_line('b', ['builtins'])
 
-blurb = ' * Schema-defined QAPI types'
+    for o, a in opts:
+        if o in ('-b', '--builtins'):
+            opt_builtins = True
 
-genc = QAPIGenC(blurb, __doc__)
-genh = QAPIGenH(blurb, __doc__)
+    blurb = ' * Schema-defined QAPI types'
 
-genc.add(mcgen('''
+    genc = QAPIGenC(blurb, __doc__)
+    genh = QAPIGenH(blurb, __doc__)
+
+    genc.add(mcgen('''
 #include "qemu/osdep.h"
 #include "qapi/dealloc-visitor.h"
 #include "%(prefix)sqapi-types.h"
 #include "%(prefix)sqapi-visit.h"
 ''',
-               prefix=prefix))
+                   prefix=prefix))
 
-genh.add(mcgen('''
+    genh.add(mcgen('''
 #include "qapi/util.h"
 '''))
 
-schema = QAPISchema(input_file)
-vis = QAPISchemaGenTypeVisitor(opt_builtins)
-schema.visit(vis)
-genc.add(vis.defn)
-genh.add(vis.decl)
+    schema = QAPISchema(input_file)
+    vis = QAPISchemaGenTypeVisitor(opt_builtins)
+    schema.visit(vis)
+    genc.add(vis.defn)
+    genh.add(vis.decl)
+
+    if do_c:
+        genc.write(output_dir, prefix + 'qapi-types.c')
+    if do_h:
+        genh.write(output_dir, prefix + 'qapi-types.h')
+
 
-if do_c:
-    genc.write(output_dir, prefix + 'qapi-types.c')
-if do_h:
-    genh.write(output_dir, prefix + 'qapi-types.h')
+if __name__ == '__main__':
+    main(sys.argv)
diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py
index d5ca480421..3c23a9389d 100644
--- a/scripts/qapi-visit.py
+++ b/scripts/qapi-visit.py
@@ -323,47 +323,53 @@ class QAPISchemaGenVisitVisitor(QAPISchemaVisitor):
         self.decl += gen_visit_decl(name)
         self.defn += gen_visit_alternate(name, variants)
 
-# If you link code generated from multiple schemata, you want only one
-# instance of the code for built-in types.  Generate it only when
-# opt_builtins, enabled by command line option -b.  See also
-# QAPISchemaGenVisitVisitor.visit_end().
-opt_builtins = False
 
-(input_file, output_dir, do_c, do_h, prefix, opts) = \
-    parse_command_line('b', ['builtins'])
+def main(argv):
+    # If you link code generated from multiple schemata, you want only one
+    # instance of the code for built-in types.  Generate it only when
+    # opt_builtins, enabled by command line option -b.  See also
+    # QAPISchemaGenVisitVisitor.visit_end().
+    opt_builtins = False
 
-for o, a in opts:
-    if o in ('-b', '--builtins'):
-        opt_builtins = True
+    (input_file, output_dir, do_c, do_h, prefix, opts) = \
+        parse_command_line('b', ['builtins'])
 
-blurb = ' * Schema-defined QAPI visitors'
+    for o, a in opts:
+        if o in ('-b', '--builtins'):
+            opt_builtins = True
 
-genc = QAPIGenC(blurb, __doc__)
-genh = QAPIGenH(blurb, __doc__)
+    blurb = ' * Schema-defined QAPI visitors'
 
-genc.add(mcgen('''
+    genc = QAPIGenC(blurb, __doc__)
+    genh = QAPIGenH(blurb, __doc__)
+
+    genc.add(mcgen('''
 #include "qemu/osdep.h"
 #include "qemu-common.h"
 #include "qapi/error.h"
 #include "qapi/qmp/qerror.h"
 #include "%(prefix)sqapi-visit.h"
 ''',
-               prefix=prefix))
+                   prefix=prefix))
 
-genh.add(mcgen('''
+    genh.add(mcgen('''
 #include "qapi/visitor.h"
 #include "%(prefix)sqapi-types.h"
 
 ''',
-               prefix=prefix))
-
-schema = QAPISchema(input_file)
-vis = QAPISchemaGenVisitVisitor(opt_builtins)
-schema.visit(vis)
-genc.add(vis.defn)
-genh.add(vis.decl)
-
-if do_c:
-    genc.write(output_dir, prefix + 'qapi-visit.c')
-if do_h:
-    genh.write(output_dir, prefix + 'qapi-visit.h')
+                   prefix=prefix))
+
+    schema = QAPISchema(input_file)
+    vis = QAPISchemaGenVisitVisitor(opt_builtins)
+    schema.visit(vis)
+    genc.add(vis.defn)
+    genh.add(vis.decl)
+
+    if do_c:
+        genc.write(output_dir, prefix + 'qapi-visit.c')
+    if do_h:
+        genh.write(output_dir, prefix + 'qapi-visit.h')
+
+
+if __name__ == '__main__':
+    main(sys.argv)