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, 40 insertions, 0 deletions

diff --git a/lib/bundler/cli/issue.rb b/lib/bundler/cli/issue.rb
new file mode 100644
index 0000000000..ace0f985a9
--- /dev/null
+++ b/lib/bundler/cli/issue.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+require "rbconfig"
+
+module Bundler
+  class CLI::Issue
+    def run
+      Bundler.ui.info <<-EOS.gsub(/^ {8}/, "")
+        Did you find an issue with Bundler? Before filing a new issue,
+        be sure to check out these resources:
+
+        1. Check out our troubleshooting guide for quick fixes to common issues:
+        https://github.com/bundler/bundler/blob/master/doc/TROUBLESHOOTING.md
+
+        2. Instructions for common Bundler uses can be found on the documentation
+        site: http://bundler.io/
+
+        3. Information about each Bundler command can be found in the Bundler
+        man pages: http://bundler.io/man/bundle.1.html
+
+        Hopefully the troubleshooting steps above resolved your problem!  If things
+        still aren't working the way you expect them to, please let us know so
+        that we can diagnose and help fix the problem you're having. Please
+        view the Filing Issues guide for more information:
+        https://github.com/bundler/bundler/blob/master/doc/contributing/ISSUES.md
+
+      EOS
+
+      Bundler.ui.info Bundler::Env.new.report
+
+      Bundler.ui.info "\n## Bundle Doctor"
+      doctor
+    end
+
+    def doctor
+      require "bundler/cli/doctor"
+      Bundler::CLI::Doctor.new({}).run
+    end
+  end
+end