Description
ROS2 Galactic.
Simple Example of the Bug.
Consider the file UUID.msg, identical with ros2/unique_identifier_msgs/msg/UUID.msg:
# A universally unique identifier (UUID).
#
# http://en.wikipedia.org/wiki/Universally_unique_identifier
# http://tools.ietf.org/html/rfc4122.html
uint8[16] uuid
Consider the file UUID.idl, generated by ROS2:
// generated from rosidl_adapter/resource/msg.idl.em
// with input from unique_identifier_msgs/msg/UUID.msg
// generated code does not contain a copyright notice
module unique_identifier_msgs {
module msg {
typedef uint8 uint8__16[16];
@verbatim (language="comment", text=
" A universally unique identifier (UUID)." "\n"
"" "\n"
" http://en.wikipedia.org/wiki/Universally_unique_identifier" "\n"
" http://tools.ietf.org/html/rfc4122.html")
struct UUID {
uint8__16 uuid;
};
};
};
Consider the file UUID.proto, this is the file generated by rosidl_typesupport_protobuf/rosidl_adapter_proto/bin/rosidl_adapter_proto:
// generated from rosidl_adapter_proto/resource/idl.proto.em
// with input from unique_identifier_msgs:msg/UUID.idl
// generated code does not contain a copyright notice
syntax = "proto3";
package unique_identifier_msgs.msg.pb;
// A universally unique identifier (UUID).
http://en.wikipedia.org/wiki/Universally_unique_identifier
http://tools.ietf.org/html/rfc4122.html
message UUID
{
bytes uuid = 293563397;
}
This is wrong and protoc will not compile it.
Lines 9-12 should instead be this:
// A universally unique identifier (UUID).
//
// http://en.wikipedia.org/wiki/Universally_unique_identifier
// http://tools.ietf.org/html/rfc4122.html
I think the problem is with this expression inside msg.proto.em: comment = "//" + re.sub(r"\\n", "\n//", annotation.value["text"]). However, I do not know why this ever worked, maybe re changed or an issue about different python versions. On my environment, if I change this line to comment = "//" + re.sub(r"\n", "\n//", annotation.value["text"]), then generation works OK.