Creates the symlinks to run the applications in the gem. Moves the symlink if the gem being installed has a newer version.
Performs various checks before installing the gem such as the install repository is writable and its directories exist, required Ruby and rubygems versions are met and that dependencies are installed.
Version and dependency checks are skipped if this install is forced.
The dependent check will be skipped if the install is ignoring dependencies.
Writes the .gem file to the cache directory
Given a name and requirement, downloads this gem into cache and returns the filename. Returns nil if the gem cannot be located.
Find and fetch gem name tuples that match dependency.
If matching_platform is false, gems for all platforms are returned.
Return the best specification that contains the file matching path.
Return the latest installed spec for gem name.
Specification attributes that must be non-nil
Make sure the YAML specification is properly formatted with dashes
Finds all gems that satisfy dep
Choose from a list of options. question is a prompt displayed above the list. list is a list of option strings. Returns the pair [option_name, option_index].
Private method to assemble query from attributes, scope, filter, and extensions.
Returns the destination encoding name as a string.