samhuri.net/server/spec/helpers.rb

module Helpers

  def increasing?(list)
    comparisons(list).all? { |x| x && x <= 0 }
  end

  def decreasing?(list)
    comparisons(list).all? { |x| x && x >= 0 }
  end

  def comparisons(list)
    x = list.first
    list.drop(1).map do |y|
      x <=> y
    end
  end

  def git_bare?(dir)
    !File.exist?(File.join(dir, '.git'))
  end

  def git_sha(dir)
    if git_bare?(dir)
      `cd '#{dir}' && cat "$(cut -d' ' -f2 HEAD)"`.strip
    else
      `cd '#{dir}' && git log -n1`.split[1].strip
    end
  end

  def git_reset_hard(dir, ref = nil)
    if git_bare?(dir)
      raise 'git_reset_hard does not support bare repos'
    else
      args = ref ? "'#{ref}'" : ''
      `cd '#{dir}' && git reset --hard #{args}`
    end
  end

end