Get list of all gem names from Rubygems

gistfile1.txt

$ gem list --verbose -r

*** REMOTE GEMS ***

GET https://api.rubygems.org/latest_specs.4.8.gz
302 Moved Temporarily
GET https://s3.amazonaws.com/production.s3.rubygems.org/latest_specs.4.8.gz
200 OK
^CERROR:  Interrupted

$ curl -O https://s3.amazonaws.com/production.s3.rubygems.org/latest_specs.4.8.gz
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  632k  100  632k    0     0   261k      0  0:00:02  0:00:02 --:--:--  262k

$ ungzip latest_specs.4.8.gz 

$ irb
irb(main):001:0> gems=Marshal.load File.read("latest_specs.4.8");gems.first
=> ["_", #<Gem::Version "1.2">, "ruby"]
irb(main):002:0> gems[0..10].map{|g| g.first }
=> ["_", "-", "0mq", "0xffffff", "1234567890_", "12_hour_time", "189seg", "1_as_identity_function", "1pass", "24games", "24point"]
irb(main):003:0> gems.count
=> 79071