Add conversion script

Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: I408debe584bcacad37e0d2f67a59440bb7ea4728

script/oss.py

@@ -0,0 +1,72 @@
+#!/usr/bin/python3
+
+import os
+import shutil
+import sys
+
+def copy_files_to_oss_project(src_root, dst_root):
+  shutil.rmtree(dst_root + "/cpp", ignore_errors=True)
+  shutil.rmtree(dst_root + "/proto", ignore_errors=True)
+  shutil.copytree(src_root + "/proto", dst_root + "/proto/")
+  shutil.copytree(src_root + "/cpp/platform/", dst_root + "/cpp/platform/")
+  shutil.copytree(src_root + "/connections/core/", dst_root + "/cpp/core/")
+  shutil.copytree(src_root + "/connections/proto/", dst_root + "/proto/connections/")
+
+def post_process_oss_files(path):
+  modified_total = 0
+  top_level = True
+  top_dirs = ["cpp", "proto"]
+  transforms = (
+    ("third_party/", ""),
+    ("location/nearby/connections/core", "core"),
+    ("location/nearby/cpp/platform", "platform"),
+    ("security/cryptauth/lib/securegcm", "securegcm"),
+    ("testing/base/public/gmock.h", "gmock/gmock.h"),
+    ("testing/base/public/gunit.h", "gtest/gtest.h"),
+    ("net/proto2/compat/public/message_lite.h", "google/protobuf/message_lite.h"),
+    ("LOCATION_NEARBY_CONNECTIONS_", ""),
+    ("LOCATION_NEARBY_CPP_", ""),
+    ("location/nearby/proto", "proto"),
+    ("location/nearby/connections/proto", "proto/connections"),
+    ("_portable_proto.pb.h", ".pb.h"),
+    (".proto.h", ".pb.h"),
+  )
+  for root, dirs, files in os.walk(path):
+    if top_level:
+      # we must convert cpp/ and proto/ subtrees.
+      # everything else is not parsed.
+      dirs.clear()
+      dirs.extend(top_dirs)
+      top_level = False
+      continue
+    for file in files:
+      fname = root + "/" + file
+      if file in ["METADATA"]:
+        os.remove(fname)
+        continue
+      modified = False
+      lines=[]
+      with open(fname, "r") as f:
+        for line in f:
+          orig = line
+          for lookup, substitute in transforms:
+            line = line.replace(lookup, substitute)
+          if orig != line:
+            modified = True
+          lines.append(line)
+      if modified:
+        with open(fname, "w") as f:
+          for line in lines:
+            f.write(line)
+        modified_total += 1
+  return modified_total
+
+def main(args):
+  src = "/google/src/cloud/%s/%s/google3/location/nearby" % (os.environ["USER"], args[1])
+  dst = args[2]
+  copy_files_to_oss_project(src, dst)
+  total = post_process_oss_files(dst)
+  print("Total modified: {} files".format(total))
+
+if __name__ == "__main__":
+  sys.exit(main(sys.argv))