Remove file from repository feature

After click on remove file button you will be asked for commit message
via modal window. After submitting modal form file will be removed from
repository
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/controllers/projects/blob_controller.rb

@@ -7,9 +7,30 @@ class Projects::BlobController < Projects::ApplicationController
   before_filter :authorize_code_access!
   before_filter :require_non_empty_project
 
+  before_filter :blob
+
   def show
-    @blob = @repository.blob_at(@commit.id, @path)
+  end
+
+  def destroy
+    result = Files::DeleteContext.new(@project, current_user, params, @ref, @path).execute
+
+    if result[:status] == :success
+      flash[:notice] = "Your changes have been successfully commited"
+      redirect_to project_tree_path(@project, @ref)
+    else
+      flash[:alert] = result[:error]
+      render :show
+    end
+  end
+
+  private
+
+  def blob
+    @blob ||= @repository.blob_at(@commit.id, @path)
+
+    return not_found! unless @blob
 
-    not_found! unless @blob
+    @blob
   end
 end

app/views/projects/blob/_actions.html.haml

@@ -4,7 +4,7 @@
     - if allowed_tree_edit?
       = link_to "edit", project_edit_tree_path(@project, @id), class: "btn btn-small"
     - else
-      %span.btn.btn-small.disabled Edit
+      %span.btn.btn-small.disabled edit
   = link_to "raw", project_raw_path(@project, @id), class: "btn btn-small", target: "_blank"
   -# only show normal/blame view links for text files
   - if @blob.text?
@@ -13,3 +13,7 @@
     - else
       = link_to "blame", project_blame_path(@project, @id), class: "btn btn-small" unless @blob.empty?
   = link_to "history", project_commits_path(@project, @id), class: "btn btn-small"
+
+  - if allowed_tree_edit?
+    = link_to '#modal-remove-blob', class: "remove-blob btn btn-small btn-remove", "data-toggle" => "modal" do
+      remove

app/views/projects/blob/_remove.html.haml

+%div#modal-remove-blob.modal.hide
+  .modal-header
+    %a.close{href: "#", "data-dismiss" => "modal"} ×
+    %h3.page-title Remove #{@blob.name}
+    %p.light
+      From branch
+      %strong= @ref
+
+  .modal-body
+    = form_tag project_blob_path(@project, @id), method: :delete do
+      .control-group.commit_message-group
+        = label_tag 'commit_message', class: "control-label" do
+          Commit message
+        .controls
+          = text_area_tag 'commit_message', params[:commit_message], placeholder: "Removed this file because...", required: true, rows: 3
+      .control-group
+        .controls
+          = submit_tag 'Remove file', class: 'btn btn-remove'
+          = link_to "Cancel", '#', class: "btn btn-cancel", "data-dismiss" => "modal"

app/views/projects/blob/show.html.haml

@@ -2,3 +2,6 @@
   = render 'shared/ref_switcher', destination: 'blob', path: @path
 %div#tree-holder.tree-holder
   = render 'blob', blob: @blob
+
+- if allowed_tree_edit?
+  = render 'projects/blob/remove'

config/routes.rb

@@ -173,7 +173,7 @@ Gitlab::Application.routes.draw do
     end
 
     scope module: :projects do
-      resources :blob,      only: [:show], constraints: {id: /.+/}
+      resources :blob,      only: [:show, :destroy], constraints: {id: /.+/}
       resources :raw,       only: [:show], constraints: {id: /.+/}
       resources :tree,      only: [:show], constraints: {id: /.+/, format: /(html|js)/ }
       resources :edit_tree, only: [:show, :update], constraints: {id: /.+/}, path: 'edit'