Creates a new SourceList
Creates a new SpecFetcher. Ordinarily you want to use the default fetcher from Gem::SpecFetcher::fetcher which uses the Gem.sources.
If you need to retrieve specifications from a different source, you can send it as an argument.
Specification constructor. Assigns the default values to the attributes and yields itself for further initialization. Optionally takes name and version.
Constructs an uninstaller that will uninstall gem
Creates a new URI formatter for uri.
Creates a new StreamUI wrapping in_stream for user input, out_stream for standard output, err_stream for error output. If usetty is true then special operations (like asking for passwords) will use the TTY commands to disable character echo.
The Console UI has no arguments as it defaults to reading input from stdin, output to stdout and warnings or errors to stderr.
The SilentUI has no arguments as it does not use any stream.
ARGV is Everything passed to the executable, does not include executable name
All other intputs are dependency injection for testing