reference_datetime: Default to git author date

  puts str unless @options[:quiet]

end

def build_one_configuration(suite, arch, build_desc, reference_datetime)

def build_one_configuration(suite, arch, build_desc)

  FileUtils.rm_f("var/build.log")

  bits = @bitness[arch] or raise "unknown architecture ${arch}"

      script.puts "GBUILD_COMMON_CACHE=$HOME/cache/common"

    end

    script.puts "MAKEOPTS=(-j#{@options[:num_procs]})"

    (ref_date, ref_time) = reference_datetime.split

    script.puts "REFERENCE_DATETIME='#{reference_datetime}'"

    script.puts "REFERENCE_DATE='#{ref_date}'"

    script.puts "REFERENCE_TIME='#{ref_time}'"

    script.puts

    author_date = nil

    build_desc["remotes"].each do |remote|

      dir = sanitize(remote["dir"], remote["dir"])

      author_date = `cd inputs/#{dir} && git log --format=@%at -1 | date +"%F %T" -u -f -`.strip

      raise "error looking up author date in #{dir}" unless $?.exitstatus == 0

      system! "copy-to-target #{@quiet_flag} inputs/#{dir} build/"

      script.puts "(cd build/#{dir} && git reset -q --hard && git clean -q -f -d)"

    end

    script.puts

    ref_datetime = build_desc["reference_datetime"] || author_date

    (ref_date, ref_time) = ref_datetime.split

    script.puts "REFERENCE_DATETIME='#{ref_datetime}'"

    script.puts "REFERENCE_DATE='#{ref_date}'"

    script.puts "REFERENCE_TIME='#{ref_time}'"

    script.puts

    script.puts "cd build"

    script.puts build_desc["script"]

  end

distro = build_desc["distro"] || "ubuntu"

suites = build_desc["suites"] or raise "must supply suites"

archs = build_desc["architectures"] or raise "must supply architectures"

reference_datetime = build_desc["reference_datetime"] or raise "must supply reference_datetime"

ENV['DISTRO'] = distro

    arch = sanitize(arch, "architecture")

    # Build!

    build_one_configuration(suite, arch, build_desc, reference_datetime)

    build_one_configuration(suite, arch, build_desc)

    info "Grabbing results from target"

    system! "copy-from-target #{@quiet_flag} out #{build_dir}"