module ElasticAPM::Util

def self.git_sha
  sha = `git rev-parse --verify HEAD 2>&1`.chomp
  $?&.success? ? sha : nil
end

def self.hex_to_bits(str)
  str.hex.to_s(2).rjust(str.size * 4, '0')
end

def self.micros(target = Time.now)
  utc = target.utc
  utc.to_i * 1_000_000 + utc.usec
end

def self.monotonic_micros
  Process.clock_gettime(Process::CLOCK_MONOTONIC, :microsecond)
end

def self.reverse_merge!(first, *others)
  others.reduce(first) do |curr, other|
    curr.merge!(other) { |_, _, new| new }
  end
end

def self.truncate(value, max_length: 1024)
  return unless value
  value = String(value)
  return value if value.length <= max_length
  value[0...(max_length - 1)] + '…'
end