Class: Gem::Commands::VersionsCommand

Inherits:
Gem::Command
  • Object
show all
Defined in:
lib/rubygems/commands/versions_command.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ VersionsCommand

Returns a new instance of VersionsCommand.



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# File 'lib/rubygems/commands/versions_command.rb', line 5

def initialize
  super 'versions', description
end

Instance Method Details

#arguments ⇒ Object 



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# File 'lib/rubygems/commands/versions_command.rb', line 13

def arguments
  'GEMNAME        exact name of gem for which to list versions'
end

#description ⇒ Object 



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# File 'lib/rubygems/commands/versions_command.rb', line 9

def description
  'List all published versions of a gem.  Versions you have installed locally are asterisked.'
end

#execute ⇒ Object 



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# File 'lib/rubygems/commands/versions_command.rb', line 21

def execute
  name = get_one_gem_name
  locals = local_versions name

  begin
    response = ::HTTParty.get "https://rubygems.org/api/v1/versions/#{name}.json"
  rescue MultiJson::DecodeError # Rubygems' invalid JSON response of plain text trips up HTTParty.
    puts "Unable to find #{name}."
    return
  end

  if response.code == 200
    remotes = response.map { |item| item['number'] }.map { |v| Gem::Version.create v }.sort.reverse.map &:to_s
    remotes.each do |r|
      puts "#{locals.include?(r) ? '*' : ' '} #{r}"
    end
  else
    puts "Unable to find #{name}."
  end
end

#local_versions(name) ⇒ Object 



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# File 'lib/rubygems/commands/versions_command.rb', line 42

def local_versions(name)
  specs = if Gem::Specification.respond_to? :find_all_by_name
    Gem::Specification.find_all_by_name name
  else
    dep = Gem::Dependency.new name, Gem::Requirement.default
    Gem.source_index.search dep
  end
  specs.map { |spec| spec.version.to_s }
end

#usage ⇒ Object 



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# File 'lib/rubygems/commands/versions_command.rb', line 17

def usage
  "#{program_name} GEMNAME"
end