x264.rb

require 'formula'

class X264DownloadStrategy < CurlDownloadStrategy
  def tarball_path
    Pathname.new("#{HOMEBREW_CACHE}/#{name}-#{resource.version}#{ext}")
  end

  def ext
    '.tar.gz'
  end
end

class GitVersion
  def initialize(downloader)
    @downloader = downloader
  end

  def get_revision
    `cd #{git_cache} && git rev-list origin/master | sort | wc -l | awk '{print $1}'`.strip
  end

  def get_head_hash
    `cd #{git_cache} && git rev-list origin/master | head -1 | cut -c 1-7`.strip
  end

  private
  def git_cache
    @downloader.cached_location
  end
end

class X264 < Formula
  homepage 'http://www.videolan.org/developers/x264.html'
  url 'http://git.videolan.org/?p=x264.git;a=snapshot;h=aff928d2a2f601072cebecfd1ac5ff768880cf88;sf=tgz', :using => X264DownloadStrategy
  sha1 '51ce24e35d67360e721538541e9e8a1a6961779d'
  version 'r2397'
  head 'http://git.videolan.org/git/x264.git'

  devel do
    url 'http://git.videolan.org/?p=x264.git;a=snapshot;h=d6b4e63d2ed8d444b77c11b36c1d646ee5549276;sf=tgz', :using => X264DownloadStrategy
    sha1 '733997577215ec233b2ca9382bbd679f9c668d2a'
    version 'r2409'
  end

  depends_on 'yasm' => :build

  option "enable-shared",       "build shared library"
  option "enable-static",       "build static library"
  option "disable-opencl",      "disable OpenCL features"
  option "disable-gpl",         "disable GPL-only features"
  option "disable-thread",      "disable multithreaded encoding"
  option "disable-interlaced",  "disable interlaced encoding support"
  option "bit-depth=10",        "set output bit depth 10"
  option "enable-debug",        "add -g"
  option "enable-gprof",        "add -pg"
  option "enable-strip",        "add -s"
  option "enable-pic",          "build position-independent code"
  option "disable-avs",         "disable avisynth support"
  option "disable-swscale",     "disable swscale support"
  option "disable-lavf",        "disable libavformat support"
  option "disable-ffms",        "disable ffmpegsource support"
  option "disable-gpac",        "disable gpac support"
  option "disable-lsmash",      "disable lsmash support"

  def install
    args = ["--prefix=#{prefix}"]
    args << "--enable-shared"   if build.include? "enable-shared"
    args << "--enable-static"   if build.include? "enable-static"
    args << "--disable-opencl"  if build.include? "disable-opencl"
    args << "--disable-gpl"     if build.include? "disable-gpl"
    args << "--disable-thread"  if build.include? "disable-thread"
    args << "--bit-depth=10"    if build.include? "bit-depth=10"
    args << "--enable-debug"    if build.include? "enable-debug"
    args << "--enable-gprof"    if build.include? "enable-gprof"
    args << "--enable-strip"    if build.include? "enable-strip"
    args << "--enable-pic"      if build.include? "enable-pic"
    args << "--disable-avs"     if build.include? "disable-avs"
    args << "--disable-swscale" if build.include? "disable-swscale"
    args << "--disable-lavf"    if build.include? "disable-lavf"
    args << "--disable-ffms"    if build.include? "disable-ffms"
    args << "--disable-gpac"    if build.include? "disable-gpac"
    args << "--disable-lsmash"  if build.include? "disable-lsmash"


    system "./configure", *args

    if build.head?
      git = GitVersion.new(@active_spec.downloader)
      _version = "r" + git.get_revision
      _hash = git.get_head_hash
    else
      _version = version.to_s
      _hash = url.slice(/h=(\w+);/, 1).slice(0..6)
    end

    inreplace 'x264_config.h' do |s|
      s.gsub! "X264_VERSION \"\"", "X264_VERSION \" #{_version} #{_hash}\""
      s.gsub! ".x", ".#{_version[1..-1]} #{_hash}"
    end

    File.open('x264_config.h', 'a') do |file|
      file << "#define X264_REV #{_version[1..-1]}\n"
      file << "#define X264_REV_DIFF 0\n"
    end

    system "make install"
  end
end