Update copy and URLs used when reverting MRs.

app/controllers/projects/commit_controller.rb

@@ -62,13 +62,32 @@ class Projects::CommitController < Projects::ApplicationController
   def revert
     return render_404 if @target_branch.blank?
 
-    create_commit(Commits::RevertService, success_notice: "The commit has been successfully reverted.",
-                                          success_path: namespace_project_commits_path(@project.namespace, @project, @target_branch),
-                                          failure_path: namespace_project_commit_path(@project.namespace, @project, params[:id]))
+    create_commit(Commits::RevertService, success_notice: "The #{revert_type_title} has been successfully reverted.",
+                                          success_path: successful_revert_path, failure_path: failed_revert_path)
   end
 
   private
 
+  def revert_type_title
+    @commit.merged_merge_request ? 'merge request' : 'commit'
+  end
+
+  def successful_revert_path
+    return referenced_merge_request_url if @commit.merged_merge_request
+
+    namespace_project_commits_url(@project.namespace, @project, @target_branch)
+  end
+
+  def failed_revert_path
+    return referenced_merge_request_url if @commit.merged_merge_request
+
+    namespace_project_commit_url(@project.namespace, @project, params[:id])
+  end
+
+  def referenced_merge_request_url
+    namespace_project_merge_request_url(@project.namespace, @project, @commit.merged_merge_request)
+  end
+
   def commit
     @commit ||= @project.commit(params[:id])
   end
@@ -99,6 +118,7 @@ class Projects::CommitController < Projects::ApplicationController
     @mr_target_branch = @target_branch
     @commit_params = {
       commit: @commit,
+      revert_type_title: revert_type_title,
       create_merge_request: params[:create_merge_request].present? || different_project?
     }
   end

app/models/commit.rb

@@ -227,6 +227,12 @@ class Commit
     parents.size > 1
   end
 
+  def merged_merge_request
+    return @merged_merge_request if defined?(@merged_merge_request)
+
+    @merged_merge_request = is_a_merge_commit? && MergeRequest.where(merge_commit_sha: id).first
+  end
+
   private
 
   def repo_changes

app/services/commits/revert_service.rb

@@ -14,7 +14,7 @@ module Commits
       if commit
         success
       else
-        error("Sorry, we cannot revert this commit automatically.
+        error("Sorry, we cannot revert this #{params[:revert_type_title]} automatically.
               It may have already been reverted, or a more recent commit may
               have updated some of its content.")
       end