use Bundler for dependency management and Rake gem tasks

Back in 2016, we chose not to use Bundler in Ruby/OpenSSL development
because Bundler depended on openssl and could not be used for testing
openssl itself - "bundle exec rake test" would end up with loading two
different versions of openssl at the same time.

This has been resolved long time ago. We can now safely use it for
development dependency management and for Rake tasks.

.github/workflows/test.yml

@@ -22,7 +22,7 @@ jobs:
           ruby-version: ${{ matrix.ruby }}
 
       - name: depends
-        run:  rake install_dependencies
+        run:  bundle install
 
       - name: compile
         run:  rake compile -- --enable-debug
@@ -50,7 +50,7 @@ jobs:
           mingw: _upgrade_ openssl
 
       - name: depends
-        run:  rake install_dependencies
+        run:  bundle install
 
       # pkg-config is disabled because it can pick up the different OpenSSL installation
       # SSL_DIR is set as needed by MSP-Greg/setup-ruby-pkgs
@@ -110,7 +110,7 @@ jobs:
           ruby-version: ${{ matrix.ruby }}
 
       - name: depends
-        run:  rake install_dependencies
+        run:  bundle install
 
       - name: compile
         run:  rake compile -- --enable-debug --with-openssl-dir=$HOME/.openssl/${{ matrix.openssl }}

.gitignore

@@ -1,3 +1,5 @@
+/.bundle
+/Gemfile.lock
 /doc/
 /pkg/
 /tmp/

Gemfile

@@ -0,0 +1,8 @@
+source "https://rubygems.org"
+
+gemspec
+
+gem "rake"
+gem "rake-compiler"
+gem "test-unit", "~> 3.0"
+gem "rdoc"

Rakefile

@@ -1,12 +1,12 @@
-require 'rake'
 require 'rake/testtask'
 require 'rdoc/task'
+require 'bundler/gem_tasks'
 
 begin
   require 'rake/extensiontask'
   Rake::ExtensionTask.new('openssl')
 rescue LoadError
-  warn "rake-compiler not installed. Run 'rake install_dependencies' to " \
+  warn "rake-compiler not installed. Run 'bundle install' to " \
     "install testing dependency gems."
 end
 
@@ -26,26 +26,6 @@ task :debug do
   ruby "-I./lib -ropenssl -ve'puts OpenSSL::OPENSSL_VERSION, OpenSSL::OPENSSL_LIBRARY_VERSION'"
 end
 
-task :install_dependencies do
-  if ENV["USE_HTTP_RUBYGEMS_ORG"] == "1"
-    Gem.sources.replace([Gem::Source.new("http://rubygems.org")])
-  end
-
-  Gem.configuration.verbose = false
-  gemspec = Gem::Specification.load('openssl.gemspec')
-
-  gemspec.development_dependencies.each do |dep|
-    print "Installing #{dep.name} (#{dep.requirement}) ... "
-    installed = dep.matching_specs
-    if installed.empty?
-      installed = Gem.install(dep.name, dep.requirement)
-      puts "#{installed[0].version}"
-    else
-      puts "(found #{installed[0].version})"
-    end
-  end
-end
-
 namespace :sync do
   task :from_ruby do
     sh "./tool/sync-with-trunk"

openssl.gemspec

@@ -17,10 +17,5 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = ">= 2.3.0"
 
-  spec.add_development_dependency "rake"
-  spec.add_development_dependency "rake-compiler"
-  spec.add_development_dependency "test-unit", "~> 3.0"
-  spec.add_development_dependency "rdoc"
-
   spec.metadata["msys2_mingw_dependencies"] = "openssl"
 end