Remove anonymous support due to deprecation.

Fixes #275

This change is needed due to the deprecation warning/removal made
by Github on the gist tool. See https://blog.github.com/2018-02-18-deprecation-notice-removing-anonymous-gist-creation/
for more info.

Author: esteban zapata

lib/gist.rb

@@ -127,7 +127,8 @@ def multi_gist(files, options={})
 
     existing_gist = options[:update].to_s.split("/").last
     if options[:anonymous]
-      access_token = nil
+      raise 'Anonymous gist support has been removed by Github. ' \
+        'See: https://blog.github.com/2018-02-18-deprecation-notice-removing-anonymous-gist-creation/'
     else
       access_token = (options[:access_token] || auth_token())
     end

spec/rawify_spec.rb

@@ -6,7 +6,16 @@
   end
 
   it "should return the raw file url" do
-    Gist.gist("Test gist", :output => :raw_url, :anonymous => true).should == "https://gist.github.com/anonymous/XXXXXX/raw"
+    Gist.gist("Test gist", :output => :raw_url, :anonymous => false).should == "https://gist.github.com/anonymous/XXXXXX/raw"
+  end
+
+  it 'should raise an error when trying to do operations without being logged in' do
+    error_msg = 'Anonymous gist support has been removed by Github. ' \
+      'See: https://blog.github.com/2018-02-18-deprecation-notice-removing-anonymous-gist-creation/'
+
+    expect do
+      Gist.gist("Test gist", output: :raw_url, anonymous: true)
+    end.to raise_error(StandardError, error_msg)
   end
 end
 

spec/shorten_spec.rb

@@ -5,11 +5,20 @@
 
   it "should return a shortened version of the URL when response is 200" do
     stub_request(:post, "https://git.io/create").to_return(:status => 200, :body => 'XXXXXX')
-    Gist.gist("Test gist", :output => :short_url, :anonymous => true).should == "https://git.io/XXXXXX"
+    Gist.gist("Test gist", :output => :short_url, anonymous: false).should == "https://git.io/XXXXXX"
   end
 
   it "should return a shortened version of the URL when response is 201" do
     stub_request(:post, "https://git.io/create").to_return(:status => 201, :headers => { 'Location' => 'https://git.io/XXXXXX' })
-    Gist.gist("Test gist", :output => :short_url, :anonymous => true).should == "https://git.io/XXXXXX"
+    Gist.gist("Test gist", :output => :short_url, anonymous: false).should == "https://git.io/XXXXXX"
+  end
+
+  it 'should raise an error when trying to get short urls without being logged in' do
+    error_msg = 'Anonymous gist support has been removed by Github. ' \
+      'See: https://blog.github.com/2018-02-18-deprecation-notice-removing-anonymous-gist-creation/'
+
+    expect do
+      Gist.gist("Test gist", output: :short_url, anonymous: true)
+    end.to raise_error(StandardError, error_msg)
   end
 end

spec/spec_helper.rb

@@ -11,7 +11,7 @@
     mocks.syntax = :should
   end
   config.expect_with :rspec do |expectations|
-    expectations.syntax = :should
+    expectations.syntax = [:should, :expect]
   end
 end