1 files changed, 64 insertions, 0 deletions
diff --git a/spec/bundler/support/rubygems_ext.rb b/spec/bundler/support/rubygems_ext.rb
new file mode 100644
index 0000000000..b484d63eab
--- /dev/null
+++ b/spec/bundler/support/rubygems_ext.rb
@@ -0,0 +1,64 @@
+# frozen_string_literal: true
+require "rubygems/user_interaction"
+require "support/path" unless defined?(Spec::Path)
+
+module Spec
+  module Rubygems
+    DEPS = begin
+      deps = {
+        # rack 2.x requires Ruby version >= 2.2.2.
+        # artifice doesn't support rack 2.x now.
+        "rack" => "< 2",
+        # rack-test 0.7.0 dropped 1.8.7 support
+        # https://github.com/rack-test/rack-test/issues/193#issuecomment-314230318
+        "rack-test" => "< 0.7.0",
+        "artifice" => "~> 0.6.0",
+        "compact_index" => "~> 0.11.0",
+        "sinatra" => "~> 1.4.7",
+        # Rake version has to be consistent for tests to pass
+        "rake" => "10.0.2",
+        # 3.0.0 breaks 1.9.2 specs
+        "builder" => "2.1.2",
+        "bundler" => "1.12.0",
+      }
+      # ruby-graphviz is used by the viz tests
+      deps["ruby-graphviz"] = nil if RUBY_VERSION >= "1.9.3"
+      deps
+    end
+
+    def self.setup
+      Gem.clear_paths
+
+      ENV["BUNDLE_PATH"] = nil
+      ENV["GEM_HOME"] = ENV["GEM_PATH"] = Path.base_system_gems.to_s
+      ENV["PATH"] = ["#{Path.root}/exe", "#{Path.system_gem_path}/bin", ENV["PATH"]].join(File::PATH_SEPARATOR)
+
+      manifest = DEPS.to_a.sort_by(&:first).map {|k, v| "#{k} => #{v}\n" }
+      manifest_path = "#{Path.base_system_gems}/manifest.txt"
+      # it's OK if there are extra gems
+      if !File.exist?(manifest_path) || !(manifest - File.readlines(manifest_path)).empty?
+        FileUtils.rm_rf(Path.base_system_gems)
+        FileUtils.mkdir_p(Path.base_system_gems)
+        puts "installing gems for the tests to use..."
+        install_gems(DEPS)
+        File.open(manifest_path, "w") {|f| f << manifest.join }
+      end
+
+      ENV["HOME"] = Path.home.to_s
+      ENV["TMPDIR"] = Path.tmpdir.to_s
+
+      Gem::DefaultUserInteraction.ui = Gem::SilentUI.new
+    end
+
+    def self.install_gems(gems)
+      reqs, no_reqs = gems.partition {|_, req| !req.nil? && !req.split(" ").empty? }
+      reqs = reqs.sort_by {|name, _| name == "rack" ? 0 : 1 } # TODO: remove when we drop ruby 1.8.7 support
+      no_reqs.map!(&:first)
+      reqs.map! {|name, req| "'#{name}:#{req}'" }
+      deps = reqs.concat(no_reqs).join(" ")
+      cmd = "gem install #{deps} --no-rdoc --no-ri --conservative"
+      puts cmd
+      system(cmd) || raise("Installing gems #{deps} for the tests to use failed!")
+    end
+  end
+end