Pass the proxy settings to GitWorktree from GitRepository

This commit also adds a path setting to the proxy url because
without it the url validation was failing in libgit2. It wants
at least a trailing slash.

https://bugzilla.redhat.com/show_bug.cgi?id=1735712

app/models/git_repository.rb

@@ -231,9 +231,20 @@ def worktree_params
         params[:password] = auth.password
       end
     end
+    params[:proxy_url] = proxy_url if proxy_url?
     params
   end
 
+  def proxy_url?
+    !!Settings.git_repository_proxy.host
+  end
+
+  def proxy_url
+    uri_opts = Settings.git_repository_proxy.to_h.slice(:host, :port, :scheme, :path)
+    uri_opts[:path] ||= "/"
+    URI::Generic.build(uri_opts).to_s
+  end
+
   def broadcast_repo_dir_delete
     MiqQueue.broadcast(
       :class_name  => self.class.name,

config/settings.yml

@@ -840,6 +840,7 @@
   :port:
   :user:
   :scheme:
+  :path:
 :help_menu:
   :documentation:
     :type: default

spec/models/git_repository_spec.rb

@@ -93,6 +93,19 @@
         expect(repo.default_authentication.password).to eq(password)
       end
 
+      it "sends the proxy settings to the worktree instance" do
+        stub_settings(:git_repository_proxy => {
+          :host => "example.com",
+          :port => "80",
+          :scheme => "http",
+          :path => "/proxy"
+        })
+        expect(GitWorktree).to receive(:new).with(hash_including(:proxy_url => "http://example.com:80/proxy")).twice.times.and_return(gwt)
+        expect(gwt).to receive(:pull).with(no_args)
+
+        repo.refresh
+      end
+
       context "self signed certifcate" do
         let(:verify_ssl) { OpenSSL::SSL::VERIFY_NONE }