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, 94 insertions, 0 deletions

diff --git a/lib/bundler/env.rb b/lib/bundler/env.rb
new file mode 100644
index 0000000000..8b990baf40
--- /dev/null
+++ b/lib/bundler/env.rb
@@ -0,0 +1,94 @@
+# frozen_string_literal: true
+require "bundler/rubygems_integration"
+require "bundler/source/git/git_proxy"
+
+module Bundler
+  class Env
+    def write(io)
+      io.write report
+    end
+
+    def report(options = {})
+      print_gemfile = options.delete(:print_gemfile) { true }
+      print_gemspecs = options.delete(:print_gemspecs) { true }
+
+      out = String.new("## Environment\n\n```\n")
+      out << "Bundler   #{Bundler::VERSION}\n"
+      out << "Rubygems  #{Gem::VERSION}\n"
+      out << "Ruby      #{ruby_version}"
+      out << "GEM_HOME  #{ENV["GEM_HOME"]}\n" unless ENV["GEM_HOME"].nil? || ENV["GEM_HOME"].empty?
+      out << "GEM_PATH  #{ENV["GEM_PATH"]}\n" unless ENV["GEM_PATH"] == ENV["GEM_HOME"]
+      out << "RVM       #{ENV["rvm_version"]}\n" if ENV["rvm_version"]
+      out << "Git       #{git_version}\n"
+      out << "Platform  #{Gem::Platform.local}\n"
+      out << "OpenSSL   #{OpenSSL::OPENSSL_VERSION}\n" if defined?(OpenSSL::OPENSSL_VERSION)
+      %w(rubygems-bundler open_gem).each do |name|
+        specs = Bundler.rubygems.find_name(name)
+        out << "#{name} (#{specs.map(&:version).join(",")})\n" unless specs.empty?
+      end
+
+      out << "```\n"
+
+      unless Bundler.settings.all.empty?
+        out << "\n## Bundler settings\n\n```\n"
+        Bundler.settings.all.each do |setting|
+          out << setting << "\n"
+          Bundler.settings.pretty_values_for(setting).each do |line|
+            out << "  " << line << "\n"
+          end
+        end
+        out << "```\n"
+      end
+
+      return out unless SharedHelpers.in_bundle?
+
+      if print_gemfile
+        out << "\n## Gemfile\n"
+        out << "\n### #{Bundler.default_gemfile.relative_path_from(SharedHelpers.pwd)}\n\n"
+        out << "```ruby\n" << read_file(Bundler.default_gemfile).chomp << "\n```\n"
+
+        out << "\n### #{Bundler.default_lockfile.relative_path_from(SharedHelpers.pwd)}\n\n"
+        out << "```\n" << read_file(Bundler.default_lockfile).chomp << "\n```\n"
+      end
+
+      if print_gemspecs
+        dsl = Dsl.new.tap {|d| d.eval_gemfile(Bundler.default_gemfile) }
+        out << "\n## Gemspecs\n" unless dsl.gemspecs.empty?
+        dsl.gemspecs.each do |gs|
+          out << "\n### #{File.basename(gs.loaded_from)}"
+          out << "\n\n```ruby\n" << read_file(gs.loaded_from).chomp << "\n```\n"
+        end
+      end
+
+      out
+    end
+
+  private
+
+    def read_file(filename)
+      File.read(filename.to_s).strip
+    rescue Errno::ENOENT
+      "<No #{filename} found>"
+    rescue => e
+      "#{e.class}: #{e.message}"
+    end
+
+    def ruby_version
+      str = String.new("#{RUBY_VERSION}")
+      if RUBY_VERSION < "1.9"
+        str << " (#{RUBY_RELEASE_DATE}"
+        str << " patchlevel #{RUBY_PATCHLEVEL}" if defined? RUBY_PATCHLEVEL
+        str << ") [#{RUBY_PLATFORM}]\n"
+      else
+        str << "p#{RUBY_PATCHLEVEL}" if defined? RUBY_PATCHLEVEL
+        str << " (#{RUBY_RELEASE_DATE} revision #{RUBY_REVISION}) [#{RUBY_PLATFORM}]\n"
+      end
+    end
+
+    def git_version
+      Bundler::Source::Git::GitProxy.new(nil, nil, nil).full_version
+    rescue Bundler::Source::Git::GitNotInstalledError
+      "not installed"
+    end
+  end
+end