Merge bundler to standard libraries.

  rubygems 2.7.x depends bundler-1.15.x. This is preparation for
  rubygems and bundler migration.

  * lib/bundler.rb, lib/bundler/*: files of bundler-1.15.4
  * spec/bundler/*: rspec examples of bundler-1.15.4. I applied patches.
    * https://github.com/bundler/bundler/pull/6007
    * Exclude not working examples on ruby repository.
    * Fake ruby interpriter instead of installed ruby.
  * Makefile.in: Added test task named `test-bundler`. This task is only
    working macOS/linux yet. I'm going to support Windows environment later.
  * tool/sync_default_gems.rb: Added sync task for bundler.

  [Feature #12733][ruby-core:77172]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59779 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 45 insertions, 0 deletions

diff --git a/lib/bundler/cli/platform.rb b/lib/bundler/cli/platform.rb
new file mode 100644
index 0000000000..9fdab0a53c
--- /dev/null
+++ b/lib/bundler/cli/platform.rb
@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+module Bundler
+  class CLI::Platform
+    attr_reader :options
+    def initialize(options)
+      @options = options
+    end
+
+    def run
+      platforms, ruby_version = Bundler.ui.silence do
+        locked_ruby_version = Bundler.locked_gems && Bundler.locked_gems.ruby_version
+        gemfile_ruby_version = Bundler.definition.ruby_version && Bundler.definition.ruby_version.single_version_string
+        [Bundler.definition.platforms.map {|p| "* #{p}" },
+         locked_ruby_version || gemfile_ruby_version]
+      end
+      output = []
+
+      if options[:ruby]
+        if ruby_version
+          output << ruby_version
+        else
+          output << "No ruby version specified"
+        end
+      else
+        output << "Your platform is: #{RUBY_PLATFORM}"
+        output << "Your app has gems that work on these platforms:\n#{platforms.join("\n")}"
+
+        if ruby_version
+          output << "Your Gemfile specifies a Ruby version requirement:\n* #{ruby_version}"
+
+          begin
+            Bundler.definition.validate_runtime!
+            output << "Your current platform satisfies the Ruby version requirement."
+          rescue RubyVersionMismatch => e
+            output << e.message
+          end
+        else
+          output << "Your Gemfile does not specify a Ruby version requirement."
+        end
+      end
+
+      Bundler.ui.info output.join("\n\n")
+    end
+  end
+end