Class: GemInstaller::VersionSpecifier

Inherits:
Object
  • Object
show all
Defined in:
lib/geminstaller/version_specifier.rb

Instance Method Summary collapse

Instance Method Details

#specify(version_requirement, available_versions, gem_name = nil) ⇒ Object

NOTE: available_versions should be sorted in descending order (highest versions first) This method will return the first matching version

Raises:



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# File 'lib/geminstaller/version_specifier.rb', line 5

def specify(version_requirement, available_versions, gem_name = nil)
  rubygems_version_requirement = Gem::Version::Requirement.new [version_requirement]
  if available_versions.respond_to? :to_str
    available_versions = available_versions.split(', ')
  end
  available_versions.each do |available_version_string|
    available_version = Gem::Version.new(available_version_string)
    if rubygems_version_requirement.satisfied_by?(available_version)
      return available_version.to_s
    end
  end
  gem_name_msg = ''
  if gem_name
    gem_name_msg = "for gem '#{gem_name}' "
  end
  error_msg = "The specified version requirement '#{version_requirement}' #{gem_name_msg}is not met by any of the available versions: #{available_versions.join(', ')}."
  raise GemInstaller::GemInstallerError.new(error_msg)
end