Adds ruby version to Gemfile.lock.

* Adds support for `bundle update --ruby` command to allow for updating
  ruby version in Gemfile.lock.
* Adds support for `bundle install` to allow for adding ruby version in
  Gemfile.lock.

https://www.pivotaltracker.com/story/show/106008092

Signed-off-by: JT Archie <jtarchie@gmail.com>

4 files changed, 213 insertions, 1 deletions

diff --git a/spec/commands/install_spec.rb b/spec/commands/install_spec.rb
index 5132e4cffb..07fa2db836 100644
--- a/spec/commands/install_spec.rb
+++ b/spec/commands/install_spec.rb
@@ -340,6 +340,72 @@ describe "bundle install with gem sources" do
     end
   end
 
+  describe "Ruby version in Gemfile.lock" do
+    include Bundler::GemHelpers
+
+    context "and using an unsupported Ruby version" do
+      it "prints an error" do
+        install_gemfile <<-G
+          ::RUBY_VERSION = '1.8.7'
+          ruby '~> 2.1'
+        G
+        expect(out).to include("Your Ruby version is 1.8.7, but your Gemfile specified ~> 2.1")
+      end
+    end
+
+    context "and using a supported Ruby version" do
+      before do
+        install_gemfile <<-G
+          ::RUBY_VERSION = '2.1.3'
+          ::RUBY_PATCHLEVEL = 100
+          ruby '~> 2.1.0'
+        G
+      end
+
+      it "writes current Ruby version to Gemfile.lock" do
+        lockfile_should_be <<-L
+         GEM
+           specs:
+
+         PLATFORMS
+           ruby
+
+         RUBY VERSION
+            ruby 2.1.3p100
+
+         DEPENDENCIES
+
+         BUNDLED WITH
+            #{Bundler::VERSION}
+        L
+      end
+
+      it "does not update Gemfile.lock with updated ruby versions" do
+        install_gemfile <<-G
+          ::RUBY_VERSION = '2.2.3'
+          ::RUBY_PATCHLEVEL = 100
+          ruby '~> 2.2.0'
+        G
+
+        lockfile_should_be <<-L
+         GEM
+           specs:
+
+         PLATFORMS
+           ruby
+
+         RUBY VERSION
+            ruby 2.1.3p100
+
+         DEPENDENCIES
+
+         BUNDLED WITH
+            #{Bundler::VERSION}
+        L
+      end
+    end
+  end
+
   describe "when Bundler root contains regex chars" do
     before do
       root_dir = tmp("foo[]bar")
diff --git a/spec/commands/update_spec.rb b/spec/commands/update_spec.rb
index 0ea721d738..18a9289d69 100644
--- a/spec/commands/update_spec.rb
+++ b/spec/commands/update_spec.rb
@@ -319,3 +319,122 @@ describe "bundle update" do
     expect(exitstatus).to eq(22) if exitstatus
   end
 end
+
+describe "bundle update --ruby" do
+  context "when the Gemfile removes the ruby" do
+    it "removes the Ruby from the Gemfile.lock" do
+      install_gemfile <<-G
+          ::RUBY_VERSION = '2.1.3'
+          ::RUBY_PATCHLEVEL = 100
+          ruby '~> 2.1.0'
+      G
+
+      install_gemfile <<-G
+          ::RUBY_VERSION = '2.1.4'
+          ::RUBY_PATCHLEVEL = 222
+      G
+
+      bundle "update --ruby"
+
+      lockfile_should_be <<-L
+       GEM
+         specs:
+
+       PLATFORMS
+         ruby
+
+       DEPENDENCIES
+
+       BUNDLED WITH
+          #{Bundler::VERSION}
+      L
+    end
+  end
+
+  context "when the Gemfile specified an updated Ruby verison" do
+    it "updates the Gemfile.lock with the latest version" do
+      install_gemfile <<-G
+          ::RUBY_VERSION = '2.1.3'
+          ::RUBY_PATCHLEVEL = 100
+          ruby '~> 2.1.0'
+      G
+
+      install_gemfile <<-G
+          ::RUBY_VERSION = '2.1.4'
+          ::RUBY_PATCHLEVEL = 222
+          ruby '~> 2.1.0'
+      G
+
+      bundle "update --ruby"
+
+      lockfile_should_be <<-L
+       GEM
+         specs:
+
+       PLATFORMS
+         ruby
+
+       RUBY VERSION
+          ruby 2.1.4p222
+
+       DEPENDENCIES
+
+       BUNDLED WITH
+          #{Bundler::VERSION}
+      L
+    end
+  end
+
+  context "when a different Ruby is being used than has been versioned" do
+    it "shows a helpful error message" do
+      install_gemfile <<-G
+          ::RUBY_VERSION = '2.1.3'
+          ::RUBY_PATCHLEVEL = 100
+          ruby '~> 2.1.0'
+      G
+
+      install_gemfile <<-G
+          ::RUBY_VERSION = '2.2.2'
+          ::RUBY_PATCHLEVEL = 505
+          ruby '~> 2.1.0'
+      G
+
+      bundle "update --ruby"
+      expect(out).to include("Your Ruby version is 2.2.2, but your Gemfile specified ~> 2.1.0")
+    end
+  end
+
+  context "when updating Ruby version and Gemfile `ruby`" do
+    it "updates the Gemfile.lock with the latest version" do
+      install_gemfile <<-G
+          ::RUBY_VERSION = '2.1.3'
+          ::RUBY_PATCHLEVEL = 100
+          ruby '~> 2.1.0'
+      G
+
+      install_gemfile <<-G
+          ::RUBY_VERSION = '1.8.3'
+          ::RUBY_PATCHLEVEL = 55
+          ruby '~> 1.8.0'
+      G
+
+      bundle "update --ruby"
+
+      lockfile_should_be <<-L
+       GEM
+         specs:
+
+       PLATFORMS
+         ruby
+
+       RUBY VERSION
+          ruby 1.8.3p55
+
+       DEPENDENCIES
+
+       BUNDLED WITH
+          #{Bundler::VERSION}
+      L
+    end
+  end
+end
diff --git a/spec/lock/lockfile_spec.rb b/spec/lock/lockfile_spec.rb
index bcca03983c..3776cd2070 100644
--- a/spec/lock/lockfile_spec.rb
+++ b/spec/lock/lockfile_spec.rb
@@ -1124,6 +1124,33 @@ describe "the lockfile format" do
     G
   end
 
+  it "captures the Ruby version in the lockfile", :focus do
+    install_gemfile <<-G
+      source "file://#{gem_repo1}"
+      ruby '#{RUBY_VERSION}'
+      gem "rack", "> 0.9", "< 1.0"
+    G
+
+    lockfile_should_be <<-G
+      GEM
+        remote: file:#{gem_repo1}/
+        specs:
+          rack (0.9.1)
+
+      PLATFORMS
+        ruby
+
+      RUBY VERSION
+         ruby #{RUBY_VERSION}p#{RUBY_PATCHLEVEL}
+
+      DEPENDENCIES
+        rack (> 0.9, < 1.0)
+
+      BUNDLED WITH
+         #{Bundler::VERSION}
+    G
+  end
+
   # Some versions of the Bundler 1.1 RC series introduced corrupted
   # lockfiles. There were two major problems:
   #
diff --git a/spec/resolver/basic_spec.rb b/spec/resolver/basic_spec.rb
index 416f94d4c5..f13756ea24 100644
--- a/spec/resolver/basic_spec.rb
+++ b/spec/resolver/basic_spec.rb
@@ -99,7 +99,7 @@ describe "Resolving" do
       deps << Bundler::DepProxy.new(d, "ruby")
     end
 
-    got = Bundler::Resolver.resolve(deps, @index, {}, [], "1.8.7")
+    got = Bundler::Resolver.resolve(deps, @index, {}, [], Bundler::RubyVersionRequirement.new("1.8.7", nil, nil, nil))
     got = got.map(&:full_name).sort
     expect(got).to eq(%w(foo-1.0.0 bar-1.0.0).sort)
   end