intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 32 insertions, 0 deletions

diff --git a/build/scripts/gen_py_reg.py b/build/scripts/gen_py_reg.py
new file mode 100644
index 0000000000..1560135ae8
--- /dev/null
+++ b/build/scripts/gen_py_reg.py
@@ -0,0 +1,32 @@
+import sys
+
+template = '''
+extern "C" void PyImport_AppendInittab(const char* name, void (*fn)(void));
+extern "C" void {1}();
+
+namespace {
+    struct TRegistrar {
+        inline TRegistrar() {
+            PyImport_AppendInittab("{0}", {1});
+        }
+    } REG;
+}
+'''
+
+
+def mangle(name):
+    if '.' not in name:
+        return name
+    return ''.join('{}{}'.format(len(s), s) for s in name.split('.'))
+
+if __name__ == '__main__':
+    if len(sys.argv) != 3:
+        print >>sys.stderr, 'Usage: <path/to/gen_py_reg.py> <python_module_name> <output_file>'
+        print >>sys.stderr, 'Passed: ' + ' '.join(sys.argv)
+        sys.exit(1)
+
+    with open(sys.argv[2], 'w') as f:
+        modname = sys.argv[1]
+        initname = 'init' + mangle(modname)
+        code = template.replace('{0}', modname).replace('{1}', initname)
+        f.write(code)