Add support for /file_hooks directory

Use /file_hooks directory for File Hooks to be in
sync with feature name.
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

.codeclimate.yml

@@ -38,3 +38,4 @@ exclude_paths:
   - backups/
   - coverage-javascript/
   - plugins/
+  - file_hooks/

.rubocop.yml

@@ -25,6 +25,7 @@ AllCops:
     - 'generator_templates/**/*'
     - 'builds/**/*'
     - 'plugins/**/*'
+    - 'file_hooks/**/*'
   CacheRootDirectory: tmp
 
 Cop/StaticTranslationDefinition:

changelogs/unreleased/dz-file-hooks-dir-support.yml

+---
+title: Add support for /file_hooks directory
+merge_request: 29675
+author:
+type: changed

doc/administration/file_hooks.md

@@ -23,22 +23,22 @@ see the [system hooks] documentation.
 
 ## Setup
 
-The file hooks must be placed directly into the `plugins` directory, subdirectories
+The file hooks must be placed directly into the `file_hooks` directory, subdirectories
 will be ignored. There is an
-[`example` directory inside `plugins`](https://gitlab.com/gitlab-org/gitlab/tree/master/plugins/examples)
+[`example` directory inside `file_hooks`](https://gitlab.com/gitlab-org/gitlab/tree/master/file_hooks/examples)
 where you can find some basic examples.
 
 Follow the steps below to set up a custom hook:
 
 1. On the GitLab server, navigate to the plugin directory.
    For an installation from source the path is usually
-   `/home/git/gitlab/plugins/`. For Omnibus installs the path is
-   usually `/opt/gitlab/embedded/service/gitlab-rails/plugins`.
+   `/home/git/gitlab/file_hooks/`. For Omnibus installs the path is
+   usually `/opt/gitlab/embedded/service/gitlab-rails/file_hooks`.
 
     For [highly available] configurations, your hook file should exist on each
     application server.
 
-1. Inside the `plugins` directory, create a file with a name of your choice,
+1. Inside the `file_hooks` directory, create a file with a name of your choice,
    without spaces or special characters.
 1. Make the hook file executable and make sure it's owned by the Git user.
 1. Write the code to make the file hook function as expected. That can be
@@ -106,9 +106,9 @@ bundle exec rake file_hooks:validate RAILS_ENV=production
 Example of output:
 
 ```plaintext
-Validating file hooks from /plugins directory
-* /home/git/gitlab/plugins/save_to_file.clj succeed (zero exit code)
-* /home/git/gitlab/plugins/save_to_file.rb failure (non-zero exit code)
+Validating file hooks from /file_hooks directory
+* /home/git/gitlab/file_hooks/save_to_file.clj succeed (zero exit code)
+* /home/git/gitlab/file_hooks/save_to_file.rb failure (non-zero exit code)
 ```
 
 [system hooks]: ../system_hooks/system_hooks.md

file_hooks/.gitignore

+*
+!*/
+!.gitignore
+!.gitkeep
+!examples/*

lib/gitlab/file_hook.rb

@@ -3,16 +3,17 @@
 module Gitlab
   module FileHook
     def self.any?
-      plugin_glob.any? { |entry| File.file?(entry) }
+      dir_glob.any? { |entry| File.file?(entry) }
     end
 
     def self.files
-      plugin_glob.select { |entry| File.file?(entry) }
+      dir_glob.select { |entry| File.file?(entry) }
     end
 
-    def self.plugin_glob
-      Dir.glob(Rails.root.join('plugins/*'))
+    def self.dir_glob
+      Dir.glob([Rails.root.join('file_hooks/*'), Rails.root.join('plugins/*')])
     end
+    private_class_method :dir_glob
 
     def self.execute_all_async(data)
       args = files.map { |file| [file, data] }

lib/tasks/file_hooks.rake

 namespace :file_hooks do
-  desc 'Validate existing plugins'
+  desc 'Validate existing file hooks'
   task validate: :environment do
-    puts 'Validating file hooks from /plugins directory'
+    puts 'Validating file hooks from /file_hooks and /plugins directories'
 
     Gitlab::FileHook.files.each do |file|
       success, message = Gitlab::FileHook.execute(file, Gitlab::DataBuilder::Push::SAMPLE_DATA)

spec/lib/gitlab/file_hook_spec.rb

@@ -3,7 +3,7 @@
 require 'spec_helper'
 
 describe Gitlab::FileHook do
-  let(:file_hook) { Rails.root.join('plugins', 'test.rb') }
+  let(:file_hook) { Rails.root.join('file_hooks', 'test.rb') }
   let(:tmp_file) { Tempfile.new('file_hook-dump') }
 
   let(:file_hook_source) do