Vendor all Homebrew's gems.

Homebrew's actually ended up using a fair few gems. While we want to
avoid Bundler at runtime (and this PR still does that, in fact uses
Bundler even less at runtime than it did before) writing our own version
to use at build-time seems redundant.

3 files changed, 14 insertions, 11 deletions

diff --git a/Library/Homebrew/dev-cmd/audit.rb b/Library/Homebrew/dev-cmd/audit.rb
index cb25ca794..9ea3faf11 100644
--- a/Library/Homebrew/dev-cmd/audit.rb
+++ b/Library/Homebrew/dev-cmd/audit.rb
@@ -65,6 +65,9 @@ module Homebrew
     ENV.activate_extensions!
     ENV.setup_build_environment
 
+    # Add RubyGems (for RuboCop).
+    ENV["PATH"] = PATH.new(ENV["PATH"]).append(HOMEBREW_GEM_HOME/"bin")
+
     if ARGV.named.empty?
       ff = Formula
       files = Tap.map(&:formula_dir)
diff --git a/Library/Homebrew/dev-cmd/man.rb b/Library/Homebrew/dev-cmd/man.rb
index 4e5103910..6e71c248b 100644
--- a/Library/Homebrew/dev-cmd/man.rb
+++ b/Library/Homebrew/dev-cmd/man.rb
@@ -35,7 +35,7 @@ module Homebrew
   end
 
   def regenerate_man_pages
-    Homebrew.install_gem_setup_path! "ronn"
+    Homebrew.run_bundler_if_needed!
 
     markup = build_man_page
     convert_man_page(markup, TARGET_DOC_PATH/"Manpage.md")
diff --git a/Library/Homebrew/dev-cmd/tests.rb b/Library/Homebrew/dev-cmd/tests.rb
index 72d6143fc..da1f5365c 100644
--- a/Library/Homebrew/dev-cmd/tests.rb
+++ b/Library/Homebrew/dev-cmd/tests.rb
@@ -49,8 +49,6 @@ module Homebrew
         FileUtils.rm_f "test/coverage/.resultset.json"
       end
 
-      ENV["BUNDLE_GEMFILE"] = "#{HOMEBREW_LIBRARY_PATH}/test/Gemfile"
-
       # Override author/committer as global settings might be invalid and thus
       # will cause silent failure during the setup of dummy Git repositories.
       %w[AUTHOR COMMITTER].each do |role|
@@ -59,10 +57,7 @@ module Homebrew
         ENV["GIT_#{role}_DATE"]  = "Sun Jan 22 19:59:13 2017 +0000"
       end
 
-      Homebrew.install_gem_setup_path! "bundler"
-      unless quiet_system("bundle", "check")
-        system "bundle", "install"
-      end
+      Homebrew.run_bundler_if_needed!
 
       parallel = true
 
@@ -106,10 +101,15 @@ module Homebrew
         files = files.reject { |p| p =~ %r{^test/os/linux(/.*|_spec\.rb)$} }
       end
 
-      if parallel
-        system "bundle", "exec", "parallel_rspec", *opts, "--", *args, "--", *files
-      else
-        system "bundle", "exec", "rspec", *args, "--", *files
+      files.map! { |p| HOMEBREW_LIBRARY_PATH/p }
+
+      (HOMEBREW_LIBRARY_PATH/"vendor/#{RUBY_ENGINE}/#{RUBY_VERSION}").cd do
+        if parallel
+          system "parallel_rspec", *opts, "--", *args, "--", *files
+        else
+          system "rspec", *args, "--", *files
+        end
+        FileUtils.rm_rf "tmp"
       end
 
       return if $?.success?