1 files changed, 93 insertions, 0 deletions
diff --git a/third_party/libwebrtc/tools_webrtc/remove_extra_namespace.py b/third_party/libwebrtc/tools_webrtc/remove_extra_namespace.py
new file mode 100755
index 0000000000..21ac2d1aa2
--- /dev/null
+++ b/third_party/libwebrtc/tools_webrtc/remove_extra_namespace.py
@@ -0,0 +1,93 @@
+#!/usr/bin/env vpython3
+
+# Copyright (c) 2023 The WebRTC project authors. All Rights Reserved.
+#
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file in the root of the source
+# tree. An additional intellectual property rights grant can be found
+# in the file PATENTS.  All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+"""Remove extra namespace qualifications
+
+Looks for names that don't need to be qualified by namespace, and deletes
+the qualifier.
+
+Depends on namespace names being properly formatted
+"""
+import os
+import glob
+import sys
+import re
+import argparse
+
+
+def remove_extra_namespace_from_file(namespace, filename):
+    print('Processing namespace', namespace, 'file', filename)
+    with open(filename) as file:
+        newfile = open(filename + '.NEW', 'w')
+        namespaces = []
+        changes = 0
+        for line in file:
+            match = re.match(r'namespace (\S+) {', line)
+            if match is not None:
+                namespaces.insert(0, match.group(1))
+                newfile.write(line)
+                continue
+            match = re.match(r'}\s+// namespace (\S+)$', line)
+            if match is not None:
+                if match.group(1) != namespaces[0]:
+                    print('Namespace mismatch')
+                    raise RuntimeError('Namespace mismatch')
+                del namespaces[0]
+                newfile.write(line)
+                continue
+            # Remove namespace usage. Only replacing when target
+            # namespace is the innermost namespace.
+            if len(namespaces) > 0 and namespaces[0] == namespace:
+                # Note that in namespace foo, we match neither ::foo::name
+                # nor morefoo::name
+                # Neither do we match foo:: when it is not followed by
+                # an identifier character.
+                usage_re = r'(?<=[^a-z:]){}::(?=[a-zA-Z])'.format(
+                    namespaces[0])
+                if re.search(usage_re, line):
+                    line = re.sub(usage_re, '', line)
+                    changes += 1
+            newfile.write(line)
+    if changes > 0:
+        print('Made', changes, 'changes to', filename)
+        os.remove(filename)
+        os.rename(filename + '.NEW', filename)
+    else:
+        os.remove(filename + '.NEW')
+
+
+def remove_extra_namespace_from_files(namespace, files):
+    for file in files:
+        if os.path.isfile(file):
+            if re.search(r'\.(h|cc)$', file):
+                remove_extra_namespace_from_file(namespace, file)
+        elif os.path.isdir(file):
+            if file in ('third_party', 'out'):
+                continue
+            subfiles = glob.glob(file + '/*')
+            remove_extra_namespace_from_files(namespace, subfiles)
+        else:
+            print(file, 'is not a file or directory, ignoring')
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        prog='remove_extra_namespace.py',
+        description=__doc__.strip().splitlines()[0],
+        epilog=''.join(__doc__.splitlines(True)[1:]),
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+    )
+    parser.add_argument('--namespace')
+    parser.add_argument('files', nargs=argparse.REMAINDER)
+    args = parser.parse_args()
+    return remove_extra_namespace_from_files(args.namespace, args.files)
+
+
+if __name__ == '__main__':
+    sys.exit(main())