Class: Chef::Provider::Package::Rubygems::GemEnvironment

Inherits:
Object
  • Object
show all
Defined in:
lib/chef/provider/package/rubygems.rb

Constant Summary collapse

DEFAULT_UNINSTALLER_OPTS = 
{:ignore => true, :executables => true}

Instance Method Summary collapse

Instance Method Details

#candidate_version_from_file(gem_dependency, source) ⇒ Object

Determines the candidate version for a gem from a .gem file on disk and checks if it matches the version contraints in gem_dependency

Returns

Gem::Version a singular gem version object is returned if the gem

is available

nil returns nil if the gem on disk doesn’t match the

version constraints for +gem_dependency+



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# File 'lib/chef/provider/package/rubygems.rb', line 100

def candidate_version_from_file(gem_dependency, source)
  spec = Gem::Format.from_file_by_path(source).spec
  if spec.satisfies_requirement?(gem_dependency)
    logger.debug {"found candidate gem version #{spec.version} from local gem package #{source}"}
    spec.version
  else
    # This is probably going to end badly...
    logger.warn { "The gem package #{source} does not satisfy the requirements #{gem_dependency.to_s}" }
    nil
  end
end

#candidate_version_from_remote(gem_dependency, *sources) ⇒ Object

Finds the newest version that satisfies the constraints of gem_dependency. The version is determined from the cache or a round-trip to the server as needed. The architecture and gem sources will be set before making the query.

Returns

Gem::Version a singular gem version object is returned if the gem

is available

nil returns nil if the gem could not be found

Raises:

  • (NotImplementedError) 


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# File 'lib/chef/provider/package/rubygems.rb', line 121

def candidate_version_from_remote(gem_dependency, *sources)
  raise NotImplementedError
end

#dependency_installer(opts = {}) ⇒ Object 



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# File 'lib/chef/provider/package/rubygems.rb', line 179

def dependency_installer(opts={})
  Gem::DependencyInstaller.new(opts)
end

#find_newest_remote_version(gem_dependency, *sources) ⇒ Object

Find the newest gem version available from Gem.sources that satisfies the constraints of gem_dependency



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# File 'lib/chef/provider/package/rubygems.rb', line 128

def find_newest_remote_version(gem_dependency, *sources)
  # DependencyInstaller sorts the results such that the last one is
  # always the one it considers best.
  spec_with_source = dependency_installer.find_gems_with_sources(gem_dependency).last

  spec = spec_with_source && spec_with_source[0]
  version = spec && spec_with_source[0].version
  if version
    logger.debug { "Found gem #{spec.name} version #{version} for platform #{spec.platform} from #{spec_with_source[1]}" }
    version
  else
    source_list = sources.compact.empty? ? "[#{Gem.sources.join(', ')}]" : "[#{sources.join(', ')}]"
    logger.warn { "Failed to find gem #{gem_dependency} from #{source_list}" }
    nil
  end
end

#gem_paths ⇒ Object

The paths where rubygems should search for installed gems. Implemented by subclasses.

Raises:

  • (NotImplementedError) 


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# File 'lib/chef/provider/package/rubygems.rb', line 53

def gem_paths
  raise NotImplementedError
end

#gem_source_index ⇒ Object

A rubygems source index containing the list of gemspecs for all available gems in the gem installation. Implemented by subclasses

Returns

Gem::SourceIndex

Raises:

  • (NotImplementedError) 


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# File 'lib/chef/provider/package/rubygems.rb', line 63

def gem_source_index
  raise NotImplementedError
end

#install(gem_dependency, options = {}) ⇒ Object

Installs a gem via the rubygems ruby API.

Options

:sources rubygems servers to use Other options are passed to Gem::DependencyInstaller.new



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# File 'lib/chef/provider/package/rubygems.rb', line 150

def install(gem_dependency, options={})
  with_gem_sources(*options.delete(:sources)) do
    with_correct_verbosity do
      dependency_installer(options).install(gem_dependency)
    end
  end
end

#installed_versions(gem_dep) ⇒ Object

Lists the installed versions of gem_name, constrained by the version spec in gem_dep

Arguments

Gem::Dependency gem_dep is a Gem::Dependency object, its version

specification constrains which gems are returned.

Returns

Gem::Specification

an array of Gem::Specification objects



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# File 'lib/chef/provider/package/rubygems.rb', line 75

def installed_versions(gem_dep)
  gem_source_index.search(gem_dep)
end

#uninstall(gem_name, gem_version = nil, opts = {}) ⇒ Object

Uninstall the gem gem_name via the rubygems ruby API. If gem_version is provided, only that version will be uninstalled. Otherwise, all versions are uninstalled.

Options

Options are passed to Gem::Uninstaller.new



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# File 'lib/chef/provider/package/rubygems.rb', line 164

def uninstall(gem_name, gem_version=nil, opts={})
  gem_version ? opts[:version] = gem_version : opts[:all] = true
  with_correct_verbosity do
    uninstaller(gem_name, opts).uninstall
  end
end

#uninstaller(gem_name, opts = {}) ⇒ Object 



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# File 'lib/chef/provider/package/rubygems.rb', line 183

def uninstaller(gem_name, opts={})
  Gem::Uninstaller.new(gem_name, DEFAULT_UNINSTALLER_OPTS.merge(opts))
end

#with_correct_verbosity ⇒ Object

Set rubygems’ user interaction to ConsoleUI or SilentUI depending on our current debug level



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# File 'lib/chef/provider/package/rubygems.rb', line 174

def with_correct_verbosity
  Gem::DefaultUserInteraction.ui = Chef::Log.debug? ? Gem::ConsoleUI.new : Gem::SilentUI.new
  yield
end

#with_gem_sources(*sources) ⇒ Object

Yields to the provided block with rubygems’ source list set to the list provided. Always resets the list when the block returns or raises an exception.



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# File 'lib/chef/provider/package/rubygems.rb', line 83

def with_gem_sources(*sources)
  sources.compact!
  original_sources = Gem.sources
  Gem.sources = sources unless sources.empty?
  yield
ensure
  Gem.sources = original_sources
end