class Bundler::Resolver::Base

def [](name)
  @base[name]
end

def base_requirements
  @base_requirements ||= build_base_requirements
end

def build_base_requirements
  base_requirements = {}
  @base.each do |ls|
    req = Gem::Requirement.new(ls.version)
    base_requirements[ls.name] = req
  end
  base_requirements
end

def delete(specs)
  specs.each do |spec|
    @base.delete(spec)
  end
end

def get_package(name)
  @packages[name]
end

def include_prereleases(names)
  names.each do |name|
    get_package(name).consider_prereleases!
  end
end

def initialize(source_requirements, dependencies, base, platforms, options)
  @source_requirements = source_requirements
  @base = base
  @packages = Hash.new do |hash, name|
    hash[name] = Package.new(name, platforms, **options)
  end
  @requirements = dependencies.map do |dep|
    dep_platforms = dep.gem_platforms(platforms)
    # Dependencies scoped to external platforms are ignored
    next if dep_platforms.empty?
    name = dep.name
    @packages[name] = Package.new(name, dep_platforms, **options.merge(:dependency => dep))
    dep
  end.compact
end

def unlock_names(names)
  names.each do |name|
    @base.delete_by_name(name)
    @base_requirements.delete(name)
  end
end