Ability to block commits with certain filenames

app/controllers/projects/git_hooks_controller.rb

@@ -28,6 +28,6 @@ class Projects::GitHooksController < Projects::ApplicationController
   # Only allow a trusted parameter "white list" through.
   def git_hook_params
     params.require(:git_hook).permit(:deny_delete_tag, :delete_branch_regex,
-      :commit_message_regex, :force_push_regex, :author_email_regex, :member_check)
+      :commit_message_regex, :force_push_regex, :author_email_regex, :member_check, :file_name_regex)
   end
 end

app/models/git_hook.rb

@@ -15,6 +15,6 @@ class GitHook < ActiveRecord::Base
   end
 
   def commit_validation?
-    commit_message_regex.present? || author_email_regex.present? || member_check
+    commit_message_regex.present? || author_email_regex.present? || member_check || file_name_regex.present?
   end
 end

app/views/projects/git_hooks/index.html.haml

@@ -64,5 +64,15 @@
         to be pushed.
         If this field is empty it allows any email.
 
+  .form-group
+    = f.label :file_name_regex, "Prohibited file names", class: 'control-label'
+    .col-sm-10
+      = f.text_field :file_name_regex, class: "form-control", placeholder: 'Example: (jar|exe)$'
+      %p.hint
+        All commited filenames must not match this
+        = link_to 'Ruby regular expression', 'http://www.ruby-doc.org/core-2.1.1/Regexp.html'
+        to be pushed.
+        If this field is empty it allows any filenames.
+    
   .form-actions
     = f.submit "Save Git hooks", class: "btn btn-create"

db/migrate/20141103160516_add_file_name_regex_to_git_hooks.rb

+class AddFileNameRegexToGitHooks < ActiveRecord::Migration
+  def change
+    add_column :git_hooks, :file_name_regex, :string
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20141030133853) do
+ActiveRecord::Schema.define(version: 20141103160516) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -93,6 +93,7 @@ ActiveRecord::Schema.define(version: 20141030133853) do
     t.datetime "updated_at"
     t.string   "author_email_regex"
     t.boolean  "member_check",         default: false, null: false
+    t.string   "file_name_regex"
   end
 
   create_table "issues", force: true do |t|

lib/gitlab/git_access.rb

@@ -128,6 +128,14 @@ module Gitlab
               return false unless User.existing_member?(commit.committer_email)
             end
           end
+
+          if git_hook.file_name_regex.present?
+            commit.diffs.each do |diff|
+              if diff.renamed_file || diff.new_file
+                return false if diff.new_path =~ Regexp.new(git_hook.file_name_regex)
+              end
+            end
+          end
         end
       end