Could not find gem 'sentient_user (>= 0, runtime)' in any of the gem sources.

get_gem_spec.rb

require 'rubygems/spec_fetcher'

files = { :latest => 'latest_specs',
  :prerelease => 'prerelease_specs',
  :all => 'specs' }

source =  Gem.sources.first

all_gems = Gem::SpecFetcher.new.load_specs(URI.parse(source), files[:all]).map{|g| g[0]}
latest_gems = Gem::SpecFetcher.new.load_specs(URI.parse(source), files[:latest]).map{|g| g[0]}

puts "Does all spec has sentient_user gem? #{all_gems.select{|g| g =~ /sentient_user/ }.size > 0}"

puts "Does latest spec has sentient_user gem? #{latest_gems.select{|g| g =~ /sentient_user/ }.size > 0}"

Gem.latest_rubygems_version

切换 VPN 后要删除 ~/.gem/specs/rubygems.org%80/ 中的文件