added GL_ID

CHANGELOG

+v3.6.3
+  - Re-exposing GL_ID to custom hooks
+
 v3.6.2
   - Enable GIT_TRACE/GIT_TRACE_PACKET/GIT_TRACE_PERFORMANCE by providing the git_trace_log_file config key

hooks/post-receive

@@ -11,7 +11,7 @@ require_relative '../lib/gitlab_custom_hook'
 require_relative '../lib/gitlab_post_receive'
 if GitlabPostReceive.new(repo_path, key_id, refs).exec &&
-    GitlabCustomHook.new.post_receive(refs, repo_path)
+    GitlabCustomHook.new(key_id).post_receive(refs, repo_path)
   exit 0
 else
   exit 1

hooks/pre-receive

@@ -17,7 +17,7 @@ require_relative '../lib/gitlab_access'
 # other hand, we run GitlabPostReceive first because the push is already done
 # and we don't want to skip it if the custom hook fails.
 if GitlabAccess.new(repo_path, key_id, refs, protocol).exec &&
-    GitlabCustomHook.new.pre_receive(refs, repo_path) &&
+    GitlabCustomHook.new(key_id).pre_receive(refs, repo_path) &&
     GitlabReferenceCounter.new(repo_path).increase
   exit 0
 else

hooks/update

@@ -3,14 +3,15 @@
 # This file was placed here by GitLab. It makes sure that your pushed commits
 # will be processed properly.
-ref_name = ARGV[0]
+ref_name  = ARGV[0]
 old_value = ARGV[1]
 new_value = ARGV[2]
 repo_path = Dir.pwd
+key_id    = ENV.delete('GL_ID')
 require_relative '../lib/gitlab_custom_hook'
-if GitlabCustomHook.new.update(ref_name, old_value, new_value, repo_path)
+if GitlabCustomHook.new(key_id).update(ref_name, old_value, new_value, repo_path)
   exit 0
 else
   exit 1

lib/gitlab_custom_hook.rb

 require 'open3'
 class GitlabCustomHook
+  attr_reader :vars
+
+  def initialize(key_id)
+    @vars = { 'GL_ID' => key_id }
+  end
+
   def pre_receive(changes, repo_path)
     hook = hook_file('pre-receive', repo_path)
     return true if hook.nil?
@@ -11,7 +17,7 @@ class GitlabCustomHook
   def post_receive(changes, repo_path)
     hook = hook_file('post-receive', repo_path)
     return true if hook.nil?
-    
+
     call_receive_hook(hook, changes)
   end
@@ -19,7 +25,7 @@ class GitlabCustomHook
     hook = hook_file('update', repo_path)
     return true if hook.nil?
-    system(hook, ref_name, old_value, new_value)
+    system(vars, hook, ref_name, old_value, new_value)
   end
   private
@@ -28,7 +34,7 @@ class GitlabCustomHook
     # Prepare the hook subprocess. Attach a pipe to its stdin, and merge
     # both its stdout and stderr into our own stdout.
     stdin_reader, stdin_writer = IO.pipe
-    hook_pid = spawn(hook, in: stdin_reader, err: :out)
+    hook_pid = spawn(vars, hook, in: stdin_reader, err: :out)
     stdin_reader.close
     # Submit changes to the hook via its stdin.

spec/gitlab_custom_hook_spec.rb

+# coding: utf-8
+require 'spec_helper'
+require 'pry'
+require 'gitlab_custom_hook'
+
+describe GitlabCustomHook do
+  let(:gitlab_custom_hook) { GitlabCustomHook.new('key_1') }
+  let(:hook_path) { File.join(ROOT_PATH, 'spec/support/gl_id_test_hook') }
+
+  context 'pre_receive hook' do
+    it 'passes GL_ID variable to hook' do
+      allow(gitlab_custom_hook).to receive(:hook_file).and_return(hook_path)
+
+      expect(gitlab_custom_hook.pre_receive('changes', 'repo_path')).to be_true
+    end
+  end
+
+  context 'post_receive hook' do
+    it 'passes GL_ID variable to hook' do
+      allow(gitlab_custom_hook).to receive(:hook_file).and_return(hook_path)
+
+      expect(gitlab_custom_hook.post_receive('changes', 'repo_path')).to be_true
+    end
+  end
+
+  context 'update hook' do
+    it 'passes GL_ID variable to hook' do
+      allow(gitlab_custom_hook).to receive(:hook_file).and_return(hook_path)
+
+      expect(gitlab_custom_hook.update('master', '', '', 'repo_path')).to be_true
+    end
+  end
+end

spec/support/gl_id_test_hook

+#!/bin/sh
+printenv GL_ID | grep -q '^key_1$'