Bug 564016 - Add c:prefix to .gir

This has a few use cases; the main one in mind right now is that
when we place this in the .typelib as well, we can use it to optimize
lookups based on GType names, by skipping entirely typelibs whose
c:prefix is not a prefix of the target type lookup.

1 files changed, 8 insertions, 6 deletions

diff --git a/giscanner/girwriter.py b/giscanner/girwriter.py
index e30bc6b..ddd562c 100644
--- a/giscanner/girwriter.py
+++ b/giscanner/girwriter.py
@@ -35,16 +35,17 @@ from .xmlwriter import XMLWriter
 
 class GIRWriter(XMLWriter):
 
-    def __init__(self, namespace, shlibs, includes, pkgs, c_includes):
+    def __init__(self, namespace, shlibs, includes, pkgs, c_includes, cprefix):
         super(GIRWriter, self).__init__()
         self.write_comment(
 '''This file was automatically generated from C sources - DO NOT EDIT!
 To affect the contents of this file, edit the original C definitions,
 and/or use gtk-doc annotations. ''')
-        self._write_repository(namespace, shlibs, includes, pkgs, c_includes)
+        self._write_repository(namespace, shlibs, includes, pkgs,
+                               c_includes, cprefix)
 
     def _write_repository(self, namespace, shlibs, includes=None,
-                          packages=None, c_includes=None):
+                          packages=None, c_includes=None, cprefix=None):
         if includes is None:
             includes = frozenset()
         if packages is None:
@@ -64,7 +65,7 @@ and/or use gtk-doc annotations. ''')
                 self._write_pkgconfig_pkg(pkg)
             for c_include in sorted(set(c_includes)):
                 self._write_c_include(c_include)
-            self._write_namespace(namespace, shlibs)
+            self._write_namespace(namespace, shlibs, cprefix)
 
     def _write_include(self, include):
         attrs = [('name', include.name), ('version', include.version)]
@@ -78,7 +79,7 @@ and/or use gtk-doc annotations. ''')
         attrs = [('name', c_include)]
         self.write_tag('c:include', attrs)
 
-    def _write_namespace(self, namespace, shlibs):
+    def _write_namespace(self, namespace, shlibs, cprefix):
         libraries = []
         for l in shlibs:
             found_libname = find_library(l)
@@ -88,7 +89,8 @@ and/or use gtk-doc annotations. ''')
 
         attrs = [('name', namespace.name),
                  ('version', namespace.version),
-                 ('shared-library', ','.join(libraries))]
+                 ('shared-library', ','.join(libraries)),
+                 ('c:prefix', cprefix)]
         with self.tagcontext('namespace', attrs):
             # We define a custom sorting function here because
             # we want aliases to be first.  They're a bit