#!/usr/bin/env ruby
require "fileutils"

REPO = "spec/support/gitlab-git-test.git".freeze
PACK_DIR = REPO + "/objects/pack"
GIT = %W[git --git-dir=#{REPO}].freeze
BASE_PACK = "pack-691247af2a6acb0b63b73ac0cb90540e93614043".freeze

def main
  unpack
  # We want to store the refs in a packed-refs file because if we don't
  # they can get mangled by filesystems.
  abort unless system(*GIT, "pack-refs", "--all")
  abort unless system(*GIT, "fsck")
end

# We don't want contributors to commit new pack files because those
# create unnecessary churn.
def unpack
  pack_files = Dir[File.join(PACK_DIR, "*")].reject { |pack|
    pack.start_with?(File.join(PACK_DIR, BASE_PACK))
  }
  return if pack_files.empty?

  pack_files.each do |pack|
    unless pack.end_with?(".pack")
      FileUtils.rm(pack)
      next
    end

    File.open(pack, "rb") do |open_pack|
      File.unlink(pack)
      abort unless system(*GIT, "unpack-objects", in: open_pack)
    end
  end
end

main