Fix clone URL not showing if protocol is HTTPS

GitLab 11.6.2 fixed the case for HTTP. However, HTTPS still did
not work because the protocol returned to `http_enabled?`
was the actual protocol in use (e.g. `https` instead of `http`).

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/55896

app/helpers/application_settings_helper.rb

@@ -20,7 +20,7 @@ module ApplicationSettingsHelper
   def enabled_protocol
     case Gitlab::CurrentSettings.enabled_git_access_protocol
     when 'http'
-      gitlab_config.protocol
+      Gitlab.config.gitlab.protocol
     when 'ssh'
       'ssh'
     end
@@ -35,7 +35,7 @@ module ApplicationSettingsHelper
   end
 
   def http_enabled?
-    all_protocols_enabled? || enabled_protocol == 'http'
+    all_protocols_enabled? || Gitlab::CurrentSettings.enabled_git_access_protocol == 'http'
   end
 
   def enabled_project_button(project, protocol)

changelogs/unreleased/sh-fix-clone-url-for-https.yml

+---
+title: Fix clone URL not showing if protocol is HTTPS
+merge_request: 24131
+author:
+type: fixed

spec/helpers/application_settings_helper_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe ApplicationSettingsHelper do
+  context 'when all protocols in use' do
+    before do
+      stub_application_setting(enabled_git_access_protocol: '')
+    end
+
+    it { expect(all_protocols_enabled?).to be_truthy }
+    it { expect(http_enabled?).to be_truthy }
+    it { expect(ssh_enabled?).to be_truthy }
+  end
+
+  context 'when SSH is only in use' do
+    before do
+      stub_application_setting(enabled_git_access_protocol: 'ssh')
+    end
+
+    it { expect(all_protocols_enabled?).to be_falsey }
+    it { expect(http_enabled?).to be_falsey }
+    it { expect(ssh_enabled?).to be_truthy }
+  end
+
+  shared_examples 'when HTTP protocol is in use' do |protocol|
+    before do
+      allow(Gitlab.config.gitlab).to receive(:protocol).and_return(protocol)
+      stub_application_setting(enabled_git_access_protocol: 'http')
+    end
+
+    it { expect(all_protocols_enabled?).to be_falsey }
+    it { expect(http_enabled?).to be_truthy }
+    it { expect(ssh_enabled?).to be_falsey }
+  end
+
+  it_behaves_like 'when HTTP protocol is in use', 'https'
+  it_behaves_like 'when HTTP protocol is in use', 'http'
+end