Contents

#!/usr/bin/env ruby

TARBALL = ARGV[0]

require 'digest/sha1'
require 'fileutils'

class Builder
  def initialize(redis_branch, tmp_dir)
    @redis_branch = redis_branch
    @tmp_dir = tmp_dir
    @build_dir = File.join(@tmp_dir, "cache", "redis-#{redis_branch}")
  end

  def run
    download_tarball
    if old_checkum != checksum
      build
      update_checksum
    end
    0
  end

  def download_tarball
    command!('wget', tarball_url, '-O', tarball_path)
  end

  def tarball_path
    File.join(@tmp_dir, "redis-#{@redis_branch}.tar.gz")
  end

  def tarball_url
    "https://github.com/antirez/redis/archive/#{@redis_branch}.tar.gz"
  end

  def build
    FileUtils.rm_rf(@build_dir)
    FileUtils.mkdir_p(@build_dir)
    command!('tar', 'xf', tarball_path, '-C', File.expand_path('../', @build_dir))
    Dir.chdir(@build_dir) do
      command!('make')
    end
  end

  def update_checksum
    File.write(checksum_path, checksum)
  end

  def old_checkum
    File.read(checksum_path)
  rescue Errno::ENOENT
    nil
  end

  def checksum_path
    File.join(@build_dir, 'build.checksum')
  end

  def checksum
    @checksum ||= Digest::SHA1.file(tarball_path).hexdigest
  end

  def command!(*args)
    puts "$ #{args.join(' ')}"
    unless system(*args)
      raise "Command failed with status #{$?.exitstatus}"
    end
  end
end

exit Builder.new(ARGV[0], ARGV[1]).run

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
redis-4.0.3	bin/build
redis-4.1.0.beta1	bin/build
redis-4.0.2	bin/build