Protobuf IO is a Ruby equivalent of https://godoc.org/github.com/gogo/protobuf/io.
Add gem 'pbio' to your Gemfile.
File.open("file.txt", "w") do |f|
pbio = PBIO::Delimited.new(f)
pbio.write MyProtoMsg.new(title: "Foo")
pbio.write MyProtoMsg.new(title: "Bar")
end
File.open("file.txt", "r") do |f|
pbio = PBIO::Delimited.new(f)
pbio.read MyProtoMsg # => #<MyProtoMsg: title: "Foo">
pbio.read MyProtoMsg # => #<MyProtoMsg: title: "Bar">
pbio.read MyProtoMsg # => nil
f.eof? # => true
end