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path: root/lib/gitlab_update.rb
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require_relative 'gitlab_init'
require_relative 'gitlab_net'
require 'json'

class GitlabUpdate
  attr_reader :config

  def initialize(repo_path, key_id, refname)
    @config = GitlabConfig.new

    @repo_path = repo_path.strip
    @repo_name = repo_path
    @repo_name.gsub!(config.repos_path.to_s, "")
    @repo_name.gsub!(/\.git$/, "")
    @repo_name.gsub!(/^\//, "")

    @key_id = key_id
    @refname = refname
    @branch_name = /refs\/heads\/([\/\w\.-]+)/.match(refname).to_a.last

    @oldrev  = ARGV[1]
    @newrev  = ARGV[2]
  end

  def exec
    # reset GL_ID env since we already
    # get value from it
    ENV['GL_ID'] = nil

    # If its push over ssh
    # we need to check user permission per branch first
    if ssh?
      if api.allowed?('git-receive-pack', @repo_name, @key_id, @branch_name)
        update_redis
        exit 0
      else
        puts "GitLab: You are not allowed to access #{@branch_name}! "
        exit 1
      end
    else
      update_redis
      exit 0
    end
  end

  protected

  def api
    GitlabNet.new
  end

  def ssh?
    @key_id =~ /\Akey\-\d+\Z/
  end

  def update_redis
    queue = "#{config.redis_namespace}:queue:post_receive"
    msg = JSON.dump({'class' => 'PostReceive', 'args' => [@repo_path, @oldrev, @newrev, @refname, @key_id]})
    system(*config.redis_command, 'rpush', queue, msg, err: '/dev/null', out: '/dev/null')
  end
end