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-rw-r--r--lib/bundler/resolver/base.rb107
1 files changed, 107 insertions, 0 deletions
diff --git a/lib/bundler/resolver/base.rb b/lib/bundler/resolver/base.rb
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index 0000000000..ad19eeb3f4
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+++ b/lib/bundler/resolver/base.rb
@@ -0,0 +1,107 @@
+# frozen_string_literal: true
+
+require_relative "package"
+
+module Bundler
+ class Resolver
+ class Base
+ attr_reader :packages, :requirements, :source_requirements
+
+ 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 [](name)
+ @base[name]
+ end
+
+ def delete(specs)
+ @base.delete(specs)
+ end
+
+ def get_package(name)
+ @packages[name]
+ end
+
+ def base_requirements
+ @base_requirements ||= build_base_requirements
+ end
+
+ def unlock_names(names)
+ indirect_pins = indirect_pins(names)
+
+ if indirect_pins.any?
+ loosen_names(indirect_pins)
+ else
+ pins = pins(names)
+
+ if pins.any?
+ loosen_names(pins)
+ else
+ unrestrict_names(names)
+ end
+ end
+ end
+
+ def include_prereleases(names)
+ names.each do |name|
+ get_package(name).consider_prereleases!
+ end
+ end
+
+ private
+
+ def indirect_pins(names)
+ names.select {|name| @base_requirements[name].exact? && @requirements.none? {|dep| dep.name == name } }
+ end
+
+ def pins(names)
+ names.select {|name| @base_requirements[name].exact? }
+ end
+
+ def loosen_names(names)
+ names.each do |name|
+ version = @base_requirements[name].requirements.first[1]
+
+ @base_requirements[name] = Gem::Requirement.new(">= #{version}")
+
+ @base.delete_by_name(name)
+ end
+ end
+
+ def unrestrict_names(names)
+ names.each do |name|
+ @base_requirements.delete(name)
+ end
+ 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
+ end
+ end
+end