Merge RubyGems/Bundler master.

  Pick from https://github.com/rubygems/rubygems/commit/5ace20dbecfeaf09fba5f616193f3cfcff70ba00

3 files changed, 51 insertions, 14 deletions

diff --git a/lib/bundler/resolver/base.rb b/lib/bundler/resolver/base.rb
index 78b798f4ec..6921c047a7 100644
--- a/lib/bundler/resolver/base.rb
+++ b/lib/bundler/resolver/base.rb
@@ -1,19 +1,47 @@
 # frozen_string_literal: true
 
+require_relative "package"
+
 module Bundler
   class Resolver
     class Base
-      def initialize(base, additional_base_requirements)
+      attr_reader :packages, :requirements, :source_requirements
+
+      def initialize(source_requirements, dependencies, base, platforms, options)
+        @source_requirements = source_requirements
+
         @base = base
-        @additional_base_requirements = additional_base_requirements
+
+        @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 [](name)
         @base[name]
       end
 
-      def delete(spec)
-        @base.delete(spec)
+      def delete(specs)
+        specs.each do |spec|
+          @base.delete(spec)
+        end
+      end
+
+      def get_package(name)
+        @packages[name]
       end
 
       def base_requirements
@@ -24,10 +52,14 @@ module Bundler
         names.each do |name|
           @base.delete_by_name(name)
 
-          @additional_base_requirements.reject! {|dep| dep.name == name }
+          @base_requirements.delete(name)
         end
+      end
 
-        @base_requirements = nil
+      def include_prereleases(names)
+        names.each do |name|
+          get_package(name).consider_prereleases!
+        end
       end
 
       private
@@ -38,7 +70,6 @@ module Bundler
           req = Gem::Requirement.new(ls.version)
           base_requirements[ls.name] = req
         end
-        @additional_base_requirements.each {|d| base_requirements[d.name] = d.requirement }
         base_requirements
       end
     end
diff --git a/lib/bundler/resolver/candidate.rb b/lib/bundler/resolver/candidate.rb
index 681f9aca73..e695ef08ee 100644
--- a/lib/bundler/resolver/candidate.rb
+++ b/lib/bundler/resolver/candidate.rb
@@ -26,9 +26,8 @@ module Bundler
 
       def initialize(version, specs: [])
         @spec_group = Resolver::SpecGroup.new(specs)
-        @platforms = specs.map(&:platform).sort_by(&:to_s).uniq
         @version = Gem::Version.new(version)
-        @ruby_only = @platforms == [Gem::Platform::RUBY]
+        @ruby_only = specs.map(&:platform).uniq == [Gem::Platform::RUBY]
       end
 
       def dependencies
@@ -88,9 +87,7 @@ module Bundler
       end
 
       def to_s
-        return @version.to_s if @platforms.empty? || @ruby_only
-
-        "#{@version} (#{@platforms.join(", ")})"
+        @version.to_s
       end
     end
   end
diff --git a/lib/bundler/resolver/package.rb b/lib/bundler/resolver/package.rb
index 7d64632860..7499a75006 100644
--- a/lib/bundler/resolver/package.rb
+++ b/lib/bundler/resolver/package.rb
@@ -15,12 +15,13 @@ module Bundler
     class Package
       attr_reader :name, :platforms, :dependency, :locked_version
 
-      def initialize(name, platforms, locked_specs, unlock, dependency: nil)
+      def initialize(name, platforms, locked_specs:, unlock:, prerelease: false, dependency: nil)
         @name = name
         @platforms = platforms
         @locked_version = locked_specs[name].first&.version
         @unlock = unlock
         @dependency = dependency || Dependency.new(name, @locked_version)
+        @prerelease = @dependency.prerelease? || @locked_version&.prerelease? || prerelease ? :consider_first : :ignore
       end
 
       def to_s
@@ -47,8 +48,16 @@ module Bundler
         @unlock.empty? || @unlock.include?(name)
       end
 
+      def ignores_prereleases?
+        @prerelease == :ignore
+      end
+
       def prerelease_specified?
-        @dependency.prerelease?
+        @prerelease == :consider_first
+      end
+
+      def consider_prereleases!
+        @prerelease = :consider_last
       end
 
       def force_ruby_platform?