[scanner] Only store types in cache store

Only store types that can be referenced in the cache store
this reduces the size of the serialized Gtk-3.0.gir in the store
from 5.7M to 366k on my system.

It also reduces the time it takes to create a gir in gtksourceview
by 35% and the time to run the warnings test by more than 50%

This also disables the cache for passthrough mode since it needs
access to the whole serialized tree.

1 files changed, 13 insertions, 3 deletions

diff --git a/giscanner/transformer.py b/giscanner/transformer.py
index be34ff5f..70addb26 100644
--- a/giscanner/transformer.py
+++ b/giscanner/transformer.py
@@ -54,6 +54,7 @@ class Transformer(object):
         self._includes = {}
         self._include_names = set()
         self._includepaths = []
+        self._passthrough_mode = False
 
     def get_includes(self):
         return self._include_names
@@ -61,6 +62,12 @@ class Transformer(object):
     def get_pkgconfig_packages(self):
         return self._pkg_config_packages
 
+    def disable_cache(self):
+        self._cachestore = None
+
+    def set_passthrough_mode(self):
+        self._passthrough_mode = True
+
     def _append_new_node(self, node):
         original = self._namespace.get(node.name)
         # Special case constants here; we allow duplication to sort-of
@@ -169,11 +176,14 @@ None."""
         sys.exit(1)
 
     def _parse_include(self, filename, uninstalled=False):
-        parser = self._cachestore.load(filename)
+        parser = None
+        if self._cachestore is not None:
+            parser = self._cachestore.load(filename)
         if parser is None:
-            parser = GIRParser()
+            parser = GIRParser(types_only=not self._passthrough_mode)
             parser.parse(filename)
-            self._cachestore.store(filename, parser)
+            if self._cachestore is not None:
+                self._cachestore.store(filename, parser)
 
         for include in parser.get_includes():
             self.register_include(include)