Class: Rubygems::Gem

Inherits:
Object
  • Object
show all
Defined in:
app/models/rubygems/gem.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, options = {}) ⇒ Gem

Returns a new instance of Gem.



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# File 'app/models/rubygems/gem.rb', line 6

def initialize(name, options={})
  @name = name
  @include_prerelease = options.fetch(:prerelease, false)
end

Instance Attribute Details

#name ⇒ Object (readonly) Also known as: to_s

Returns the value of attribute name.



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# File 'app/models/rubygems/gem.rb', line 11

def name
  @name
end

Class Method Details

.cache_key(name, date) ⇒ Object 



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# File 'app/models/rubygems/gem.rb', line 31

def self.cache_key(name, date)
  "rubygems/#{name}/releases/#{date.strftime('%Y%m%d')}/json"
end

.request_releases_of(name) ⇒ Object 



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# File 'app/models/rubygems/gem.rb', line 20

def self.request_releases_of(name)
  response = Houston.benchmark title: "GET rubygems.org" do
    Faraday.get("https://rubygems.org/api/v1/versions/#{name}.json")
  end
  raise Rubygems::Error, "Unexpected response from rubygems. Status: #{response.status}" unless response.status == 200

  MultiJson.load(response.body)
rescue Faraday::Error::ConnectionFailed
  raise Rubygems::Error, "Unable to connect to rubygems.org: #{$!.message}"
end

Instance Method Details

#fetch_releases_from_previous_cache_on_error ⇒ Object 



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# File 'app/models/rubygems/gem.rb', line 54

def fetch_releases_from_previous_cache_on_error
  yield
rescue Rubygems::Error
  Rails.logger.error "[rubygems] an error occurred fetching releases for '#{name}': #{$!}"
  Houston.report_exception $!

  # Have we cached releases any time in the last month?
  (1..30).each do |n|
    date = n.days.ago
    key = cache_key(name, date)
    if Rails.cache.exist?(key)
      Rails.logger.info "[rubygems] using releases of '#{name}' cached on #{date}"
      return Rails.cache.fetch(key)
    end
  end

  []
end

#releases ⇒ Object 



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# File 'app/models/rubygems/gem.rb', line 37

def releases
  fetch_releases_from_previous_cache_on_error do
    key = cache_key(name, Date.today)
    Rails.cache.fetch(key) { request_releases_of(name) }
  end
end

#versions ⇒ Object 



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# File 'app/models/rubygems/gem.rb', line 44

def versions
  @versions ||= begin
    versions = releases.map { |release| ::Gem::Version.new(release["number"]) }
    versions = versions.reject(&:prerelease?) unless @include_prerelease
    versions.sort.reverse
  end
end