Merge branch 'init-from-ui' into 'master'

Create first file from empty repository via UI. pt1

* Backend can now commit file to empty repository.
* Empty project UI has new file button

First step in building #1930

See merge request !1438

app/assets/stylesheets/generic/buttons.scss

@@ -173,6 +173,11 @@
       margin-right: 0px;
     }
   }
+
+  &.btn-lg {
+    font-size: 15px;
+    line-height: 1.4;
+  }
 }
 
 .btn-block {

app/services/files/create_service.rb

@@ -9,10 +9,6 @@ module Files
         return error("You are not allowed to create file in this branch")
       end
 
-      unless repository.branch_names.include?(ref)
-        return error("You can only create files if you are on top of a branch")
-      end
-
       file_name = File.basename(path)
       file_path = path
 
@@ -23,11 +19,20 @@ module Files
         )
       end
 
+      if project.empty_repo?
+        # everything is ok because repo does not have a commits yet
+      else
+        unless repository.branch_names.include?(ref)
+          return error("You can only create files if you are on top of a branch")
+        end
+
         blob = repository.blob_at_branch(ref, file_path)
 
         if blob
           return error("Your changes could not be committed, because file with such name exists")
         end
+      end
+
 
       new_file_action = Gitlab::Satellite::NewFileAction.new(current_user, project, ref, file_path)
       created_successfully = new_file_action.commit!(

app/views/projects/empty.html.haml

@@ -3,6 +3,17 @@
 
 = render "home_panel"
 
+.center.well
+  %h3
+    The repository for this project is empty
+  %p.lead
+    You can
+    = link_to '#', class: 'btn btn-new btn-lg' do
+      add a file
+     or push it via command line.
+
+%h4
+  %strong Command line instructions
 %div.git-empty
   %fieldset
     %legend Git global setup

lib/gitlab/satellite/files/new_file_action.rb

@@ -14,7 +14,14 @@ module Gitlab
           prepare_satellite!(repo)
 
           # create target branch in satellite at the corresponding commit from bare repo
+          current_ref =
+            if repo.commits.any?
               repo.git.checkout({raise: true, timeout: true, b: true}, ref, "origin/#{ref}")
+              ref
+            else
+              # skip this step if we want to add first file to empty repo
+              Satellite::PARKING_BRANCH
+            end
 
           file_path_in_satellite = File.join(repo.working_dir, file_path)
           dir_name_in_satellite = File.dirname(file_path_in_satellite)
@@ -38,10 +45,9 @@ module Gitlab
           # will raise CommandFailed when commit fails
           repo.git.commit(raise: true, timeout: true, a: true, m: commit_message)
 
-
           # push commit back to bare repo
           # will raise CommandFailed when push fails
-          repo.git.push({raise: true, timeout: true}, :origin, ref)
+          repo.git.push({raise: true, timeout: true}, :origin, "#{current_ref}:#{ref}")
 
           # everything worked
           true