AMBuildScript

# vim: set sts=2 ts=8 sw=2 tw=99 et ft=python:
import os, sys

class SDK(object):
  def __init__(self, sdk, ext, aDef, name, platform, dir):
    self.folder = 'hl2sdk-' + dir
    self.envvar = sdk
    self.ext = ext
    self.code = aDef
    self.define = name
    self.platform = platform
    self.name = dir
    self.path = None # Actual path
    self.platformSpec = platform

    # By default, nothing supports x64.
    if type(platform) is list:
      self.platformSpec = {p: ['x86'] for p in platform}
    else:
      self.platformSpec = platform

  def shouldBuild(self, target, archs):
    if target.platform not in self.platformSpec:
      return False
    if not len([i for i in self.platformSpec[target.platform] if i in archs]):
      return False
    return True

WinOnly = ['windows']
WinLinux = ['windows', 'linux']
WinLinuxMac = ['windows', 'linux', 'mac']
CSGO = {
  'windows': ['x86'],
  'linux': ['x86', 'x64'],
  'mac': ['x64']
}

PossibleSDKs = {
  'episode1':  SDK('HL2SDK', '2.ep1', '1', 'EPISODEONE', WinLinux, 'episode1'),
  'ep2':  SDK('HL2SDKOB', '2.ep2', '3', 'ORANGEBOX', WinLinux, 'orangebox'),
  'css':  SDK('HL2SDKCSS', '2.css', '6', 'CSS', WinLinuxMac, 'css'),
  'hl2dm':  SDK('HL2SDKHL2DM', '2.hl2dm', '7', 'HL2DM', WinLinuxMac, 'hl2dm'),
  'dods': SDK('HL2SDKDODS', '2.dods', '8', 'DODS', WinLinuxMac, 'dods'),
  'sdk2013': SDK('HL2SDK2013', '2.sdk2013', '9', 'SDK2013', WinLinuxMac, 'sdk2013'),
  'tf2':  SDK('HL2SDKTF2', '2.tf2', '11', 'TF2', WinLinuxMac, 'tf2'),
  'l4d':  SDK('HL2SDKL4D', '2.l4d', '12', 'LEFT4DEAD', WinLinuxMac, 'l4d'),
  'nucleardawn': SDK('HL2SDKND', '2.nd', '13', 'NUCLEARDAWN', WinLinuxMac, 'nucleardawn'),
  'l4d2': SDK('HL2SDKL4D2', '2.l4d2', '15', 'LEFT4DEAD2', WinLinuxMac, 'l4d2'),
  'darkm':  SDK('HL2SDK-DARKM', '2.darkm', '2', 'DARKMESSIAH', WinOnly, 'darkm'),
  'swarm':  SDK('HL2SDK-SWARM', '2.swarm', '16', 'ALIENSWARM', WinOnly, 'swarm'),
  'bgt':  SDK('HL2SDK-BGT', '2.bgt', '4', 'BLOODYGOODTIME', WinOnly, 'bgt'),
  'eye':  SDK('HL2SDK-EYE', '2.eye', '5', 'EYE', WinOnly, 'eye'),
  'csgo': SDK('HL2SDKCSGO', '2.csgo', '21', 'CSGO', CSGO, 'csgo'),
  'portal2':  SDK('HL2SDKPORTAL2', '2.portal2', '17', 'PORTAL2', [], 'portal2'),
  'blade':  SDK('HL2SDKBLADE', '2.blade', '18', 'BLADE', WinLinux, 'blade'),
  'insurgency':  SDK('HL2SDKINSURGENCY', '2.insurgency', '19', 'INSURGENCY', WinLinuxMac, 'insurgency'),
  'contagion':  SDK('HL2SDKCONTAGION', '2.contagion', '14', 'CONTAGION', WinOnly, 'contagion'),
  'bms':  SDK('HL2SDKBMS', '2.bms', '10', 'BMS', WinLinux, 'bms'),
  'doi':  SDK('HL2SDKDOI', '2.doi', '20', 'DOI', WinLinuxMac, 'doi'),
}

def ResolveEnvPath(env, folder):
  if env in os.environ:
    path = os.environ[env]
    if os.path.isdir(path):
      return path
    return None

  head = os.getcwd()
  oldhead = None
  while head != None and head != oldhead:
    path = os.path.join(head, folder)
    if os.path.isdir(path):
      return path
    oldhead = head
    head, tail = os.path.split(head)

  return None

def Normalize(path):
  return os.path.abspath(os.path.normpath(path))
  
def SetArchFlags(compiler, arch, platform):
  if compiler.behavior == 'gcc':
    if arch == 'x86':
      compiler.cflags += ['-m32']
      compiler.linkflags += ['-m32']
      if platform == 'mac':
        compiler.linkflags += ['-arch', 'i386']
    elif arch == 'x64':
      compiler.cflags += ['-m64', '-fPIC']
      compiler.linkflags += ['-m64']
      if platform == 'mac':
        compiler.linkflags += ['-arch', 'x86_64']
  elif compiler.like('msvc'):
    if builder.target.arch == 'x86':
      compiler.linkflags += ['/MACHINE:X86']
    elif builder.target.arch == 'x64':
      compiler.linkflags += ['/MACHINE:X64']

def AppendArchSuffix(binary, name, arch):
  if arch == 'x64':
    binary.localFolder = name + '.x64'

class SMConfig(object):
  def __init__(self):
    self.sdks = {}
    self.binaries = []
    self.extensions = []
    self.generated_headers = None
    self.mms_root = None
    self.mysql_root = {}
    self.spcomp = None
    self.spcomp_bins = None
    self.smx_files = {}
    self.versionlib = None
    self.archs = builder.target.arch.replace('x86_64', 'x64').split(',')

  def use_auto_versioning(self):
    if builder.backend != 'amb2':
      return False
    return not getattr(builder.options, 'disable_auto_versioning', False)

  @property
  def tag(self):
    if builder.options.debug == '1':
      return 'Debug'
    return 'Release'

  def detectProductVersion(self):
    builder.AddConfigureFile('product.version')

    # For OS X dylib versioning
    import re
    with open(os.path.join(builder.sourcePath, 'product.version'), 'r') as fp:
      productContents = fp.read()
    m = re.match('(\d+)\.(\d+)\.(\d+).*', productContents)
    if m == None:
      self.productVersion = '1.0.0'
    else:
      major, minor, release = m.groups()
      self.productVersion = '{0}.{1}.{2}'.format(major, minor, release)

  def detectSDKs(self):
    sdk_list = builder.options.sdks.split(',')
    use_all = sdk_list[0] == 'all'
    use_present = sdk_list[0] == 'present'

    for sdk_name in PossibleSDKs:
      sdk = PossibleSDKs[sdk_name]
      if sdk.shouldBuild(builder.target, self.archs):
        if builder.options.hl2sdk_root:
          sdk_path = os.path.join(builder.options.hl2sdk_root, sdk.folder)
        else:
          sdk_path = ResolveEnvPath(sdk.envvar, sdk.folder)
        if sdk_path is None or not os.path.isdir(sdk_path):
          if use_all or sdk_name in sdk_list:
            raise Exception('Could not find a valid path for {0}'.format(sdk.envvar))
          continue
        if use_all or use_present or sdk_name in sdk_list:
          sdk.path = Normalize(sdk_path)
          self.sdks[sdk_name] = sdk

    if len(self.sdks) < 1 and len(sdk_list):
      raise Exception('No SDKs were found that build on {0}-{1}, nothing to do.'.format(
        builder.target.platform, builder.target.arch))

    if builder.options.mms_path:
      self.mms_root = builder.options.mms_path
    else:
      self.mms_root = ResolveEnvPath('MMSOURCE110', 'mmsource-1.10')
      if not self.mms_root:
        self.mms_root = ResolveEnvPath('MMSOURCE_DEV', 'metamod-source')
      if not self.mms_root:
        self.mms_root = ResolveEnvPath('MMSOURCE_DEV', 'mmsource-central')

    if not self.mms_root or not os.path.isdir(self.mms_root):
      raise Exception('Could not find a source copy of Metamod:Source')
    self.mms_root = Normalize(self.mms_root)

    if builder.options.hasMySql:
      if builder.options.mysql_path:
        self.mysql_root['x86'] = builder.options.mysql_path
      else:
        for i in range(10):
          self.mysql_root['x86'] = ResolveEnvPath('MYSQL55', 'mysql-5.' + str(i))
          if self.mysql_root['x86']:
            break
      if not self.mysql_root['x86'] or not os.path.isdir(self.mysql_root['x86']):
        raise Exception('Could not find a path to MySQL!')
      self.mysql_root['x86'] = Normalize(self.mysql_root['x86'])

      # For now, ignore 64-bit MySQL on Windows
      if 'x64' in self.archs and builder.target.platform != 'windows':
        if builder.options.mysql64_path:
          self.mysql_root['x64'] = builder.options.mysql64_path
        else:
          for i in range(10):
            self.mysql_root['x64'] = ResolveEnvPath('MYSQL55_64', 'mysql-5.' + str(i) + '-x86_64')
            if self.mysql_root['x64']:
              break
        if not self.mysql_root['x64'] or not os.path.isdir(self.mysql_root['x64']):
          raise Exception('Could not find a path to 64-bit MySQL!')
        self.mysql_root['x64'] = Normalize(self.mysql_root['x64'])

  def configure(self):
    builder.AddConfigureFile('pushbuild.txt')
    
    if not set(self.archs).issubset(['x86', 'x64']):
      raise Exception('Unknown target architecture: {0}'.format(builder.target.arch))

    cxx = builder.DetectCxx()
    
    if cxx.like('msvc') and len(self.archs) > 1:
      raise Exception('Building multiple archs with MSVC is not currently supported')

    if cxx.family == 'msvc':
      if cxx.version < 1900:
        raise Exception('Only MSVC 2015 and later are supported, c++14 support is required.')
    if cxx.family == 'gcc':
      if cxx.version < 'gcc-4.9':
        raise Exception('Only GCC versions 4.9 or greater are supported, c++14 support is required.')
    if cxx.family == 'clang':
      if cxx.version < 'clang-3.4':
        raise Exception('Only clang versions 3.4 or greater are supported, c++14 support is required.')

    if cxx.like('gcc'):
      self.configure_gcc(cxx)
    elif cxx.family == 'msvc':
      self.configure_msvc(cxx)

    # Optimizaiton
    if builder.options.opt == '1':
      cxx.defines += ['NDEBUG']

    # Debugging
    if builder.options.debug == '1':
      cxx.defines += ['DEBUG', '_DEBUG']

    # Platform-specifics
    if builder.target.platform == 'linux':
      self.configure_linux(cxx)
    elif builder.target.platform == 'mac':
      self.configure_mac(cxx)
    elif builder.target.platform == 'windows':
      self.configure_windows(cxx)

    # Finish up.
    cxx.defines += [
      'SOURCEMOD_BUILD',
      'SM_USE_VERSIONLIB',
    ]
    cxx.includes += [
      os.path.join(builder.sourcePath, 'public'),
    ]
    if self.use_auto_versioning():
      cxx.defines += ['SM_GENERATED_BUILD']
      cxx.includes += [
        os.path.join(builder.buildPath, 'includes'),
        os.path.join(builder.sourcePath, 'versionlib'),
      ]

  def configure_gcc(self, cxx):
    cxx.defines += [
      'stricmp=strcasecmp',
      '_stricmp=strcasecmp',
      '_snprintf=snprintf',
      '_vsnprintf=vsnprintf',
      'HAVE_STDINT_H',
      'GNUC',
    ]
    cxx.cflags += [
      '-pipe',
      '-fno-strict-aliasing',
      '-Wall',
      '-Werror',
      '-Wno-unused',
      '-Wno-switch',
      '-Wno-array-bounds',
      '-msse',
      '-fvisibility=hidden',
    ]
    cxx.cxxflags += [
      '-std=c++11',
      '-fno-exceptions',
      '-fno-threadsafe-statics',
      '-Wno-non-virtual-dtor',
      '-Wno-overloaded-virtual',
      '-fvisibility-inlines-hidden',
    ]

    have_gcc = cxx.family == 'gcc'
    have_clang = cxx.family == 'clang'
    if cxx.version >= 'clang-3.9':
      cxx.cxxflags += ['-Wno-expansion-to-defined']
    if cxx.version == 'clang-3.9' or cxx.version == 'apple-clang-8.0':
      cxx.cflags += ['-Wno-varargs']
    if cxx.version >= 'clang-3.6' or cxx.version >= 'apple-clang-7.0':
      cxx.cxxflags += ['-Wno-inconsistent-missing-override']
    if cxx.version >= 'clang-2.9' or cxx.version >= 'apple-clang-3.0':
      cxx.cxxflags += ['-Wno-null-dereference']
    if have_clang or (cxx.version >= 'gcc-4.6'):
      cxx.cflags += ['-Wno-narrowing']
    if have_clang or (cxx.version >= 'gcc-4.7'):
      cxx.cxxflags += ['-Wno-delete-non-virtual-dtor']
    if cxx.version >= 'gcc-4.8':
      cxx.cflags += ['-Wno-unused-result']
    if cxx.version >= 'gcc-9.0':
      cxx.cxxflags += ['-Wno-class-memaccess', '-Wno-packed-not-aligned']
    if have_clang:
      cxx.cxxflags += ['-Wno-implicit-exception-spec-mismatch']
      if cxx.version >= 'apple-clang-5.1' or cxx.version >= 'clang-3.4':
        cxx.cxxflags += ['-Wno-deprecated-register']
      else:
        cxx.cxxflags += ['-Wno-deprecated']
      cxx.cflags += ['-Wno-sometimes-uninitialized']

    if have_gcc:
      cxx.cflags += ['-mfpmath=sse']
      cxx.cflags += ['-Wno-maybe-uninitialized']

    if builder.options.opt == '1':
      cxx.cflags += ['-O3']

  def configure_msvc(self, cxx):
    if builder.options.debug == '1':
      cxx.cflags += ['/MTd']
      cxx.linkflags += ['/NODEFAULTLIB:libcmt']
    else:
      cxx.cflags += ['/MT']
    cxx.defines += [
      '_CRT_SECURE_NO_DEPRECATE',
      '_CRT_SECURE_NO_WARNINGS',
      '_CRT_NONSTDC_NO_DEPRECATE',
      '_ITERATOR_DEBUG_LEVEL=0',
    ]
    cxx.cflags += [
      '/W3',
    ]
    cxx.cxxflags += [
      '/EHsc',
      '/GR-',
      '/TP',
    ]
    cxx.linkflags += [
      'kernel32.lib',
      'user32.lib',
      'gdi32.lib',
      'winspool.lib',
      'comdlg32.lib',
      'advapi32.lib',
      'shell32.lib',
      'ole32.lib',
      'oleaut32.lib',
      'uuid.lib',
      'odbc32.lib',
      'odbccp32.lib',
    ]

    if builder.options.opt == '1':
      cxx.cflags += ['/Ox', '/Zo']
      cxx.linkflags += ['/OPT:ICF', '/OPT:REF']

    if builder.options.debug == '1':
      cxx.cflags += ['/Od', '/RTC1']

    # This needs to be after our optimization flags which could otherwise disable it.
    # Don't omit the frame pointer.
    cxx.cflags += ['/Oy-']

  def configure_linux(self, cxx):
    cxx.defines += ['_LINUX', 'POSIX', '_FILE_OFFSET_BITS=64']
    cxx.linkflags += ['-lm']
    if cxx.family == 'gcc':
      cxx.linkflags += ['-static-libgcc']
    elif cxx.family == 'clang':
      cxx.linkflags += ['-lgcc_eh']

  def configure_mac(self, cxx):
    cxx.defines += ['OSX', '_OSX', 'POSIX', 'KE_ABSOLUTELY_NO_STL']
    cxx.cflags += ['-mmacosx-version-min=10.5']
    cxx.linkflags += [
      '-mmacosx-version-min=10.5',
      '-lstdc++',
      '-stdlib=libstdc++',
    ]
    cxx.cxxflags += ['-stdlib=libstdc++']

  def configure_windows(self, cxx):
    cxx.defines += ['WIN32', '_WINDOWS']

  def add_libamtl(self):
    # Add libamtl.
    self.libamtl = {}
    for arch in self.archs:
      def get_configure_fn(arch):
        return lambda builder, name: self.StaticLibrary(builder, name, arch)
      extra_vars = {'Configure': get_configure_fn(arch)}
      libamtl = builder.Build('public/amtl/amtl/AMBuilder', extra_vars)
      self.libamtl[arch] = libamtl.binary

  def AddVersioning(self, binary, arch):
    if builder.target.platform == 'windows':
      binary.sources += ['version.rc']
      binary.compiler.rcdefines += [
        'BINARY_NAME="{0}"'.format(binary.outputFile),
        'RC_COMPILE',
      ]
      if self.use_auto_versioning():
        binary.compiler.rcdefines += ['SM_GENERATED_BUILD']
    elif builder.target.platform == 'mac':
      if binary.type == 'library':
        binary.compiler.postlink += [
          '-compatibility_version', '1.0.0',
          '-current_version', self.productVersion
        ]
    if self.use_auto_versioning():
      binary.compiler.linkflags += [self.versionlib[arch]]
      binary.compiler.sourcedeps += SM.generated_headers
    return binary
    
  def LibraryBuilder(self, compiler, name, arch):
    binary = compiler.Library(name)
    AppendArchSuffix(binary, name, arch)
    self.AddVersioning(binary, arch)
    if binary.compiler.like('msvc'):
      binary.compiler.linkflags += ['/SUBSYSTEM:WINDOWS']
    return binary

  def ProgramBuilder(self, compiler, name, arch):
    binary = compiler.Program(name)
    AppendArchSuffix(binary, name, arch)
    self.AddVersioning(binary, arch)
    if '-static-libgcc' in binary.compiler.linkflags:
      binary.compiler.linkflags.remove('-static-libgcc')
    if '-lgcc_eh' in binary.compiler.linkflags:
      binary.compiler.linkflags.remove('-lgcc_eh')
    if binary.compiler.like('gcc'):
      binary.compiler.linkflags += ['-lstdc++', '-lpthread']
    if binary.compiler.like('msvc'):
      binary.compiler.linkflags += ['/SUBSYSTEM:CONSOLE']
    return binary
    
  def StaticLibraryBuilder(self, compiler, name, arch):
    binary = compiler.StaticLibrary(name)
    AppendArchSuffix(binary, name, arch)
    return binary;

  def Library(self, context, name, arch):
    compiler = context.cxx.clone()
    SetArchFlags(compiler, arch, builder.target.platform)
    return self.LibraryBuilder(compiler, name, arch)

  def Program(self, context, name, arch):
    compiler = context.cxx.clone()
    SetArchFlags(compiler, arch, builder.target.platform)
    return self.ProgramBuilder(compiler, name, arch)
    
  def StaticLibrary(self, context, name, arch):
    compiler = context.cxx.clone()
    SetArchFlags(compiler, arch, builder.target.platform)
    return self.StaticLibraryBuilder(compiler, name, arch)

  def ConfigureForExtension(self, context, compiler):
    compiler.cxxincludes += [
      os.path.join(context.currentSourcePath),
      os.path.join(context.currentSourcePath, 'sdk'),
      os.path.join(builder.sourcePath, 'public', 'extensions'),
      os.path.join(builder.sourcePath, 'sourcepawn', 'include'),
      os.path.join(builder.sourcePath, 'public', 'amtl', 'amtl'),
      os.path.join(builder.sourcePath, 'public', 'amtl'),
    ]
    return compiler

  def ExtLibrary(self, context, name, arch):
    binary = self.Library(context, name, arch)
    self.ConfigureForExtension(context, binary.compiler)
    return binary

  def ConfigureForHL2(self, binary, sdk, arch):
    compiler = binary.compiler
    
    SetArchFlags(compiler, arch, builder.target.platform)

    compiler.cxxincludes += [
      os.path.join(self.mms_root, 'core'),
      os.path.join(self.mms_root, 'core', 'sourcehook'),
    ]

    defines = ['SE_' + PossibleSDKs[i].define + '=' + PossibleSDKs[i].code for i in PossibleSDKs]
    compiler.defines += defines

    paths = [
      ['public'],
      ['public', 'engine'],
      ['public', 'mathlib'],
      ['public', 'vstdlib'],
      ['public', 'tier0'],
      ['public', 'tier1']
    ]
    if sdk.name == 'episode1' or sdk.name == 'darkm':
      paths.append(['public', 'dlls'])
      paths.append(['game_shared'])
    else:
      paths.append(['public', 'game', 'server'])
      paths.append(['public', 'toolframework'])
      paths.append(['game', 'shared'])
      paths.append(['common'])

    compiler.defines += ['SOURCE_ENGINE=' + sdk.code]

    if sdk.name in ['sdk2013', 'bms'] and compiler.like('gcc'):
      # The 2013 SDK already has these in public/tier0/basetypes.h
      compiler.defines.remove('stricmp=strcasecmp')
      compiler.defines.remove('_stricmp=strcasecmp')
      compiler.defines.remove('_snprintf=snprintf')
      compiler.defines.remove('_vsnprintf=vsnprintf')

    if compiler.like('msvc'):
      compiler.defines += ['COMPILER_MSVC', 'COMPILER_MSVC32']
      compiler.linkflags += ['legacy_stdio_definitions.lib']
    else:
      compiler.defines += ['COMPILER_GCC']

    if arch == 'x64':
      compiler.defines += ['X64BITS', 'PLATFORM_64BITS']

    # For everything after Swarm, this needs to be defined for entity networking
    # to work properly with sendprop value changes.
    if sdk.name in ['blade', 'insurgency', 'doi', 'csgo']:
      compiler.defines += ['NETWORK_VARS_ENABLED']

    if sdk.name in ['css', 'hl2dm', 'dods', 'sdk2013', 'bms', 'tf2', 'l4d', 'nucleardawn', 'l4d2']:
      if builder.target.platform in ['linux', 'mac']:
        compiler.defines += ['NO_HOOK_MALLOC', 'NO_MALLOC_OVERRIDE']

    if sdk.name == 'csgo' and builder.target.platform == 'linux':
      compiler.linkflags += ['-lstdc++']
      compiler.defines += ['_GLIBCXX_USE_CXX11_ABI=0']

    for path in paths:
      compiler.cxxincludes += [os.path.join(sdk.path, *path)]

    if builder.target.platform == 'linux':
      if sdk.name == 'episode1':
        lib_folder = os.path.join(sdk.path, 'linux_sdk')
      elif sdk.name in ['sdk2013', 'bms']:
        lib_folder = os.path.join(sdk.path, 'lib', 'public', 'linux32')
      elif arch == 'x64':
        lib_folder = os.path.join(sdk.path, 'lib', 'linux64')
      else:
        lib_folder = os.path.join(sdk.path, 'lib', 'linux')
    elif builder.target.platform == 'mac':
      if sdk.name in ['sdk2013', 'bms']:
        lib_folder = os.path.join(sdk.path, 'lib', 'public', 'osx32')
      elif arch == 'x64':
        lib_folder = os.path.join(sdk.path, 'lib', 'osx64')
      else:
        lib_folder = os.path.join(sdk.path, 'lib', 'mac')

    if builder.target.platform in ['linux', 'mac']:
      if sdk.name in ['sdk2013', 'bms'] or arch == 'x64':
        compiler.postlink += [
          compiler.Dep(os.path.join(lib_folder, 'tier1.a')),
          compiler.Dep(os.path.join(lib_folder, 'mathlib.a'))
        ]
      else:
        compiler.postlink += [
          compiler.Dep(os.path.join(lib_folder, 'tier1_i486.a')),
          compiler.Dep(os.path.join(lib_folder, 'mathlib_i486.a'))
        ]

      if sdk.name in ['blade', 'insurgency', 'doi', 'csgo']:
        if arch == 'x64':
          compiler.postlink += [compiler.Dep(os.path.join(lib_folder, 'interfaces.a'))]
        else:
          compiler.postlink += [compiler.Dep(os.path.join(lib_folder, 'interfaces_i486.a'))]

    dynamic_libs = []
    if builder.target.platform == 'linux':
      if sdk.name in ['css', 'hl2dm', 'dods', 'tf2', 'sdk2013', 'bms', 'nucleardawn', 'l4d2', 'insurgency', 'doi']:
        dynamic_libs = ['libtier0_srv.so', 'libvstdlib_srv.so']
      elif arch == 'x64' and sdk.name == 'csgo':
        dynamic_libs = ['libtier0_client.so', 'libvstdlib_client.so']
      elif sdk.name in ['l4d', 'blade', 'insurgency', 'doi', 'csgo']:
        dynamic_libs = ['libtier0.so', 'libvstdlib.so']
      else:
        dynamic_libs = ['tier0_i486.so', 'vstdlib_i486.so']
    elif builder.target.platform == 'mac':
      compiler.linkflags.append('-liconv')
      dynamic_libs = ['libtier0.dylib', 'libvstdlib.dylib']
    elif builder.target.platform == 'windows':
      libs = ['tier0', 'tier1', 'vstdlib', 'mathlib']
      if sdk.name in ['swarm', 'blade', 'insurgency', 'doi', 'csgo']:
        libs.append('interfaces')
      for lib in libs:
        lib_path = os.path.join(sdk.path, 'lib', 'public', lib) + '.lib'
        compiler.linkflags.append(compiler.Dep(lib_path))

    for library in dynamic_libs:
      source_path = os.path.join(lib_folder, library)
      output_path = os.path.join(binary.localFolder, library)

      def make_linker(source_path, output_path):
        def link(context, binary):
          cmd_node, (output,) = context.AddSymlink(source_path, output_path)
          return output
        return link

      linker = make_linker(source_path, output_path)
      compiler.linkflags[0:0] = [compiler.Dep(library, linker)]

    return binary

  def HL2Library(self, context, name, sdk, arch):
    binary = self.Library(context, name, arch)
    self.ConfigureForExtension(context, binary.compiler)
    return self.ConfigureForHL2(binary, sdk, arch)

  def HL2Project(self, context, name):
    project = context.cxx.LibraryProject(name)
    self.ConfigureForExtension(context, project.compiler)
    return project

  def HL2Config(self, project, name, sdk, arch):
    binary = project.Configure(name, '{0} - {1}'.format(self.tag, sdk.name))
    AppendArchSuffix(binary, name, arch)
    self.AddVersioning(binary, arch)
    return self.ConfigureForHL2(binary, sdk, arch)

SM = SMConfig()
SM.detectProductVersion()
SM.detectSDKs()
SM.configure()
SM.add_libamtl()

if SM.use_auto_versioning():
  SM.generated_headers = builder.Build(
    'tools/buildbot/Versioning',
    { 'SM': SM }
  )
  SM.versionlib = builder.Build(
    'versionlib/AMBuilder',
    { 'SM': SM }
  )

# Build SourcePawn externally.
SP = builder.Build('sourcepawn/AMBuildScript', {
  'external_root': SM,
  'external_amtl': os.path.join(builder.sourcePath, 'public', 'amtl'),
  'external_build': ['core'],
})
if len(SP.spcomp) > 1:
  SM.spcomp = SP.spcomp['x86']
else:
  SM.spcomp = SP.spcomp[list(SP.spcomp.keys())[0]]
SM.spcomp_bins = list(SP.spcomp.values())
for arch in SM.archs:
  SM.binaries += [
     SP.libsourcepawn[arch]
  ]

BuildScripts = [
  'loader/AMBuilder',
  'core/AMBuilder',
  'core/logic/AMBuilder',
  'extensions/bintools/AMBuilder',
  'extensions/clientprefs/AMBuilder',
  'extensions/curl/AMBuilder',
  'extensions/cstrike/AMBuilder',
  'extensions/geoip/AMBuilder',
  'extensions/mysql/AMBuilder',
  'extensions/regex/AMBuilder',
  'extensions/sdkhooks/AMBuilder',
  'extensions/sdktools/AMBuilder',
  'extensions/sqlite/AMBuilder',
  'extensions/tf2/AMBuilder',
  'extensions/topmenus/AMBuilder',
  'extensions/updater/AMBuilder',
]

if builder.backend == 'amb2':
  BuildScripts += [
    'plugins/AMBuilder',
    'tools/buildbot/PackageScript',
  ]

builder.Build(BuildScripts, { 'SM': SM })

if builder.options.breakpad_dump:
  builder.Build('tools/buildbot/BreakpadSymbols', { 'SM': SM })