问题
I've been getting this warning whenever I run my tests or start rails server.
When I run grep from .rvm folder I see the following:
grep -R 'Digest::Digest' .
./rubies/ruby-2.1.0/lib/ruby/2.1.0/openssl/digest.rb: warn('Digest::Digest is deprecated; Use Digest')
- additional references to openssl and ruby 2.1.0
So it looks like it's a Ruby 2.1.0 bug. Are there any fixes? There are no patches available yet as far as I can tell.
Whilst my app uses Fog and a bunch of other gems that have issues relating to this message, I'm using patched versions that don't have the bug. So I reckon Ruby is at fault here.
回答1:
Borrowing the reply from this thread
OpenSSL::Digest::Digest has been discouraged to use from very ancient era such as Ruby 1.8 and finally was deprecated recently.
If you search for the error message, you will see that a lot of gems, including fog, were still using the deprecated syntax.
I assume it will take a while before all the gems will be updated. If you came across the deprecation in one of the libs you use, I encourage you to report it to the maintainer.
Here's a few examples
- https://github.com/fog/fog/pull/2473
- https://github.com/alexreisner/geocoder/pull/580
- https://github.com/ruby/ruby/pull/446
It's likely your Rails app depends on a gem that is using that old syntax.
回答2:
If you're using bundler, a good way to find out what is causing the problem is to grep through all the gems defined in your Gemfile:
# grep (ack or ag) the problem code
bundle show --paths | xargs grep -r Digest::Digest
# here was my output
~/.gem/ruby/2.1.0/gems/fog-1.15.0/lib/fog/cloudstack.rb: @@digest = OpenSSL::Digest::Digest.new('sha1')
~/.gem/ruby/2.1.0/gems/fog-1.15.0/lib/fog/core/hmac.rb: @digest = OpenSSL::Digest::Digest.new('sha1')
~/.gem/ruby/2.1.0/gems/fog-1.15.0/lib/fog/core/hmac.rb: @digest = OpenSSL::Digest::Digest.new('sha256')
# update appropriate gems (in my case fog)
gem install fog
bundle update fog
Also make sure you aren't locked on a gem version in your Gemfile.
# change
gem 'fog', '~> 1.15.0'
# to
gem 'fog', '~> 1.0'
# or omit the version if you are a cowboy/girl
回答3:
Use OpenSSL::Digest instead of deprecated OpenSSL::Digest::Digest
来源：https://stackoverflow.com/questions/21184960/ruby-digestdigest-is-deprecated-use-digest