Add new endpoint and button to revert any commit.

app/views/projects/commit/_commit_box.html.haml

@@ -16,6 +16,8 @@
     = link_to namespace_project_tree_path(@project.namespace, @project, @commit), class: "btn btn-grouped" do
       = icon('files-o')
       Browse Files
+    = link_to '#modal-revert-commit', { 'data-target' => '#modal-revert-commit', 'data-toggle' => 'modal', class: 'btn btn-grouped'} do
+      Revert
   %div
 %p

app/views/projects/commit/_revert.html.haml

+#modal-revert-commit.modal
+  .modal-dialog
+    .modal-content
+      .modal-header
+        %a.close{href: "#", "data-dismiss" => "modal"} ×
+        %h3.page-title Revert commit
+      .modal-body
+        = form_tag revert_namespace_project_commit_path(@project.namespace, @project, @commit.id), method: :post, remote: false, class: 'form-horizontal js-create-dir-form js-requires-input' do
+          .form-group.branch
+            = label_tag 'target_branch', 'Target branch', class: 'control-label'
+            .col-sm-10
+              = text_field_tag 'target_branch', nil, required: true, class: "form-control js-target-branch"
+              - if can?(current_user, :push_code, @project)
+                .js-create-merge-request-container
+                  .checkbox
+                    - nonce = SecureRandom.hex
+                    = label_tag "create_merge_request-#{nonce}" do
+                      = check_box_tag 'create_merge_request', 1, true, class: 'js-create-merge-request', id: "create_merge_request-#{nonce}"
+                      Start a <strong>new merge request</strong> with these changes
+              - else
+                = hidden_field_tag 'create_merge_request', 1
+          .form-actions
+            = submit_tag "Revert", class: 'btn btn-create'
+            = link_to "Cancel", '#', class: "btn btn-cancel", "data-dismiss" => "modal"
+
+            - unless can?(current_user, :push_code, @project)
+              .inline.prepend-left-10
+                = commit_in_fork_help
+
+:javascript
+  new NewCommitForm($('.js-create-dir-form'))

config/routes.rb

@@ -502,6 +502,7 @@ Rails.application.routes.draw do
             get :builds
             post :cancel_builds
             post :retry_builds
+            post :revert
           end
         end