Remove rubyntlm dependency from gemspec

[mperham]

Listing optional dependencies like rubyntlm in your gemspec just adds more gems to the Gemfile.lock for applications that use Savon, even though there is little chance they will ever use NTLM suppport.

[rogerleite]

I agree with you @mperham .

Optional dependency is kind a pain on rubygems. Issue #101 proves it.
I'm trying to figure out how the best way to fix this.

Suggestions? Do you have any project with optional dependency?

Thanks

[mperham]

Yes, sidekiq has an optional dependency on sinatra because the Web UI is optional. I just have to document that people need to add it to their Gemfile to use the Web UI in their application.

For development purposes, you use a Gemfile with all your dependencies listed, optional or required. The gemspec only lists required dependencies.

[mperham]

If you have a specific version requirement, the best you can do is something like this in your code:

begin
  require 'rubyntlm'
  raise ArgumentError, "Invalid version of rubyntlm, please upgrade to 1.1.15" if defined?(RubyNTLM) && RubyNTLM::VERSION < '1.1.15'
rescue LoadError
end

[rogerleite]

@mperham thanks for the tips! On version 2.2.0, rubyntlm will be optional.
Do you need this version now or i can wait more changes to release?

@tjarratt thanks a lot for the code! 👍