Pass push options to GitLab /internal/post_receive API

push_opts[] is named as such so that it becomes an array in the
GitLab internal Grape::API params hash. If it were named push_opts, only
the final (scalar) push_opts parameter would be present.

Also update specs to include push_opts parameter:
- gitlab_post_receive_spec
- gitlab_net_spec for the internal API change

hooks/post-receive

@@ -9,9 +9,12 @@ gl_repository = ENV['GL_REPOSITORY']
 repo_path = Dir.pwd
 
 require_relative '../lib/gitlab_custom_hook'
+require_relative '../lib/hooks_utils'
 require_relative '../lib/gitlab_post_receive'
 
-if GitlabPostReceive.new(gl_repository, repo_path, key_id, refs).exec &&
+push_opts = HooksUtils.get_push_options
+
+if GitlabPostReceive.new(gl_repository, repo_path, key_id, refs, push_opts).exec &&
     GitlabCustomHook.new(repo_path, key_id).post_receive(refs)
   exit 0
 else

lib/gitlab_net.rb

@@ -119,11 +119,12 @@ class GitlabNet # rubocop:disable Metrics/ClassLength
     false
   end
 
-  def post_receive(gl_repository, identifier, changes)
+  def post_receive(gl_repository, identifier, changes, push_opts)
     params = {
       gl_repository: gl_repository,
       identifier: identifier,
-      changes: changes
+      changes: changes,
+      :"push_opts[]" => push_opts,	# ruby <2.2 syntax
     }
     resp = post("#{internal_api_endpoint}/post_receive", params)
 

lib/gitlab_post_receive.rb

@@ -8,18 +8,19 @@ require 'securerandom'
 class GitlabPostReceive
   attr_reader :config, :gl_repository, :repo_path, :changes, :jid
 
-  def initialize(gl_repository, repo_path, actor, changes)
+  def initialize(gl_repository, repo_path, actor, changes, push_opts)
     @config = GitlabConfig.new
     @gl_repository = gl_repository
     @repo_path = repo_path.strip
     @actor = actor
     @changes = changes
+    @push_opts = push_opts
     @jid = SecureRandom.hex(12)
   end
 
   def exec
     response = GitlabMetrics.measure("post-receive") do
-      api.post_receive(gl_repository, @actor, changes)
+      api.post_receive(gl_repository, @actor, changes, @push_opts)
     end
 
     return false unless response

spec/gitlab_net_spec.rb

@@ -174,8 +174,9 @@ describe GitlabNet, vcr: true do
   describe '#post_receive' do
     let(:gl_repository) { "project-1" }
     let(:changes) { "123456 789012 refs/heads/test\n654321 210987 refs/tags/tag" }
+    let(:push_opts) { ["ci-skip", "something unexpected"] }
     let(:params) do
-      { gl_repository: gl_repository, identifier: key, changes: changes }
+      { gl_repository: gl_repository, identifier: key, changes: changes, :"push_opts[]" => push_opts }
     end
     let(:merge_request_urls) do
       [{
@@ -185,7 +186,7 @@ describe GitlabNet, vcr: true do
       }]
     end
 
-    subject { gitlab_net.post_receive(gl_repository, key, changes) }
+    subject { gitlab_net.post_receive(gl_repository, key, changes, push_opts) }
 
     it 'sends the correct parameters' do
       expect_any_instance_of(Net::HTTP::Post).to receive(:set_form_data).with(hash_including(params))

spec/gitlab_post_receive_spec.rb

@@ -11,7 +11,8 @@ describe GitlabPostReceive do
   let(:base64_changes) { Base64.encode64(wrongly_encoded_changes) }
   let(:repo_path) { File.join(repository_path, repo_name) + ".git" }
   let(:gl_repository) { "project-1" }
-  let(:gitlab_post_receive) { GitlabPostReceive.new(gl_repository, repo_path, actor, wrongly_encoded_changes) }
+  let(:push_opts) { [] }
+  let(:gitlab_post_receive) { GitlabPostReceive.new(gl_repository, repo_path, actor, wrongly_encoded_changes, push_opts) }
   let(:broadcast_message) { "test " * 10 + "message " * 10 }
   let(:enqueued_at) { Time.new(2016, 6, 23, 6, 59) }
   let(:new_merge_request_urls) do