Merge branch 'branches-ending-with-json' into 'master'

Allow branch names ending with .json for graph and network page

## What does this MR do?

Allow branch names to end with `.json` for graph and network page.

## Why was this MR needed?

Displaying branches ending on `.json` in repository view crashes because links to graph and network page can not be determined.

## What are the relevant issue numbers?

fixes #20462, #19585

See merge request !5579

7 files changed, 60 insertions, 10 deletions

diff --git a/CHANGELOG b/CHANGELOG
index b44627a9a71..2bcbe501fb1 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -37,6 +37,7 @@ v 8.11.0 (unreleased)
   - Gitlab::Metrics.current_transaction needs to be public for RailsQueueDuration
   - Fix search for notes which belongs to deleted objects
   - Add GitLab Workhorse version to admin dashboard (Katarzyna Kobierska Ula Budziszewska)
+  - Allow branch names ending with .json for graph and network page !5579 (winniehell)
   - Add the `sprockets-es6` gem
   - Multiple trigger variables show in separate lines (Katarzyna Kobierska Ula Budziszewska)
   - Profile requests when a header is passed
diff --git a/app/views/projects/graphs/show.html.haml b/app/views/projects/graphs/show.html.haml
index a985b442b2d..ac5f792d140 100644
--- a/app/views/projects/graphs/show.html.haml
+++ b/app/views/projects/graphs/show.html.haml
@@ -32,7 +32,7 @@
 :javascript
   $.ajax({
     type: "GET",
-    url: location.href,
+    url: "#{namespace_project_graph_path(@project.namespace, @project, current_ref, format: :json)}",
     dataType: "json",
     success: function (data) {
       var graph = new ContributorsStatGraph();
diff --git a/config/routes.rb b/config/routes.rb
index 371eb4bee7f..2f5f32d9e30 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -626,13 +626,17 @@ Rails.application.routes.draw do
 
         get '/compare/:from...:to', to: 'compare#show', as: 'compare', constraints: { from: /.+/, to: /.+/ }
 
-        resources :network, only: [:show], constraints: { id: /(?:[^.]|\.(?!json$))+/, format: /json/ }
-
-        resources :graphs, only: [:show], constraints: { id: /(?:[^.]|\.(?!json$))+/, format: /json/ } do
-          member do
-            get :commits
-            get :ci
-            get :languages
+        # Don't use format parameter as file extension (old 3.0.x behavior)
+        # See http://guides.rubyonrails.org/routing.html#route-globbing-and-wildcard-segments
+        scope format: false do
+          resources :network, only: [:show], constraints: { id: Gitlab::Regex.git_reference_regex }
+
+          resources :graphs, only: [:show], constraints: { id: Gitlab::Regex.git_reference_regex } do
+            member do
+              get :commits
+              get :ci
+              get :languages
+            end
           end
         end
 
diff --git a/spec/finders/branches_finder_spec.rb b/spec/finders/branches_finder_spec.rb
index 482caeee64a..6fce11de30f 100644
--- a/spec/finders/branches_finder_spec.rb
+++ b/spec/finders/branches_finder_spec.rb
@@ -20,7 +20,11 @@ describe BranchesFinder do
 
         result = branches_finder.execute
 
-        expect(result.first.name).to eq('crlf-diff')
+        recently_updated_branch = repository.branches.max do |a, b|
+          repository.commit(a.target).committed_date <=> repository.commit(b.target).committed_date
+        end
+
+        expect(result.first.name).to eq(recently_updated_branch.name)
       end
 
       it 'sorts by last_updated' do
diff --git a/spec/routing/project_routing_spec.rb b/spec/routing/project_routing_spec.rb
index 9151cd3aefe..b941e78f983 100644
--- a/spec/routing/project_routing_spec.rb
+++ b/spec/routing/project_routing_spec.rb
@@ -479,13 +479,16 @@ end
 describe Projects::NetworkController, 'routing' do
   it 'to #show' do
     expect(get('/gitlab/gitlabhq/network/master')).to route_to('projects/network#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: 'master')
-    expect(get('/gitlab/gitlabhq/network/master.json')).to route_to('projects/network#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: 'master', format: 'json')
+    expect(get('/gitlab/gitlabhq/network/ends-with.json')).to route_to('projects/network#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: 'ends-with.json')
+    expect(get('/gitlab/gitlabhq/network/master?format=json')).to route_to('projects/network#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: 'master', format: 'json')
   end
 end
 
 describe Projects::GraphsController, 'routing' do
   it 'to #show' do
     expect(get('/gitlab/gitlabhq/graphs/master')).to route_to('projects/graphs#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: 'master')
+    expect(get('/gitlab/gitlabhq/graphs/ends-with.json')).to route_to('projects/graphs#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: 'ends-with.json')
+    expect(get('/gitlab/gitlabhq/graphs/master?format=json')).to route_to('projects/graphs#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: 'master', format: 'json')
   end
 end
 
diff --git a/spec/support/test_env.rb b/spec/support/test_env.rb
index 4561aa9644d..1c0c66969e3 100644
--- a/spec/support/test_env.rb
+++ b/spec/support/test_env.rb
@@ -6,6 +6,7 @@ module TestEnv
   # When developing the seed repository, comment out the branch you will modify.
   BRANCH_SHA = {
     'empty-branch'          => '7efb185',
+    'ends-with.json'        => '98b0d8b3',
     'flatten-dir'           => 'e56497b',
     'feature'               => '0b4bc9a',
     'feature_conflict'      => 'bb5206f',
diff --git a/spec/views/projects/tree/show.html.haml_spec.rb b/spec/views/projects/tree/show.html.haml_spec.rb
new file mode 100644
index 00000000000..0f3fc1ee1ac
--- /dev/null
+++ b/spec/views/projects/tree/show.html.haml_spec.rb
@@ -0,0 +1,37 @@
+require 'spec_helper'
+
+describe 'projects/tree/show' do
+  include Devise::TestHelpers
+
+  let(:project) { create(:project) }
+  let(:repository) { project.repository }
+
+  before do
+    assign(:project, project)
+    assign(:repository, repository)
+
+    allow(view).to receive(:can?).and_return(true)
+    allow(view).to receive(:can_collaborate_with_project?).and_return(true)
+  end
+
+  context 'for branch names ending on .json' do
+    let(:ref) { 'ends-with.json' }
+    let(:commit) { repository.commit(ref) }
+    let(:path) { '' }
+    let(:tree) { repository.tree(commit.id, path) }
+
+    before do
+      assign(:ref, ref)
+      assign(:commit, commit)
+      assign(:id, commit.id)
+      assign(:tree, tree)
+      assign(:path, path)
+    end
+
+    it 'displays correctly' do
+      render
+      expect(rendered).to have_css('.js-project-refs-dropdown .dropdown-toggle-text', text: ref)
+      expect(rendered).to have_css('.readme-holder .file-content', text: ref)
+    end
+  end
+end