text: """distutils.command.build
  
  Implements the Distutils 'build' command."""
  
  import sys, os
  from distutils.core import Command
  from distutils.errors import DistutilsOptionError
  from distutils.util import get_platform
  
  
  def show_compilers():
      from distutils.ccompiler import show_compilers
      show_compilers()
  
  
  class build(Command):
  
      description = "build everything needed to install"
  
      user_options = [
          ('build-base=', 'b',
           "base directory for build library"),
          ('build-purelib=', None,
           "build directory for platform-neutral distributions"),
          ('build-platlib=', None,
           "build directory for platform-specific distributions"),
          ('build-lib=', None,
           "build directory for all distribution (defaults to either " +
           "build-purelib or build-platlib"),
          ('build-scripts=', None,
           "build directory for scripts"),
          ('build-temp=', 't',
           "temporary build directory"),
          ('plat-name=', 'p',
           "platform name to build for, if supported "
           "(default: %s)" % get_platform()),
          ('compiler=', 'c',
           "specify the compiler type"),
          ('parallel=', 'j',
           "number of parallel build jobs"),
          ('debug', 'g',
           "compile extensions and libraries with debugging information"),
          ('force', 'f',
           "forcibly build everything (ignore file timestamps)"),
          ('executable=', 'e',
           "specify final destination interpreter path (build.py)"),
          ]
  
      boolean_options = ['debug', 'force']
  
      help_options = [
          ('help-compiler', None,
           "list available compilers", show_compilers),
          ]
  
      def initialize_options(self):
          self.build_base = 'build'
          # these are decided only after 'build_base' has its final value
          # (unless overridden by the user or client)
          self.build_purelib = None
          self.build_platlib = None
          self.build_lib = None
          self.build_temp = None
          self.build_scripts = None
          self.compiler = None
          self.plat_name = None
          self.debug = None
          self.force = 0
          self.executable = None
          self.parallel = None
  
      def finalize_options(self):
          if self.plat_name is None:
              self.plat_name = get_platform()
          else:
              # plat-name only supported for windows (other platforms are
              # supported via ./configure flags, if at all).  Avoid misleading
              # other platforms.
              if os.name != 'nt':
                  raise DistutilsOptionError(
                              "--plat-name only supported on Windows (try "
                              "using './configure --help' on your platform)")
  
          plat_specifier = ".%s-%d.%d" % (self.plat_name, *sys.version_info[:2])
  
          # Make it so Python 2.x and Python 2.x with --with-pydebug don't
          # share the same build directories. Doing so confuses the build
          # process for C modules
          if hasattr(sys, 'gettotalrefcount'):
              plat_specifier += '-pydebug'
  
          # 'build_purelib' and 'build_platlib' just default to 'lib' and
          # 'lib.<plat>' under the base build directory.  We only use one of
          # them for a given distribution, though --
          if self.build_purelib is None:
              self.build_purelib = os.path.join(self.build_base, 'lib')
          if self.build_platlib is None:
              self.build_platlib = os.path.join(self.build_base,
                                                'lib' + plat_specifier)
  
          # 'build_lib' is the actual directory that we will use for this
          # particular module distribution -- if user didn't supply it, pick
          # one of 'build_purelib' or 'build_platlib'.
          if self.build_lib is None:
              if self.distribution.ext_modules:
                  self.build_lib = self.build_platlib
              else:
                  self.build_lib = self.build_purelib
  
          # 'build_temp' -- temporary directory for compiler turds,
          # "build/temp.<plat>"
          if self.build_temp is None:
              self.build_temp = os.path.join(self.build_base,
                                             'temp' + plat_specifier)
          if self.build_scripts is None:
              self.build_scripts = os.path.join(self.build_base,
                                                'scripts-%d.%d' % sys.version_info[:2])
  
          if self.executable is None and sys.executable:
              self.executable = os.path.normpath(sys.executable)
  
          if isinstance(self.parallel, str):
              try:
                  self.parallel = int(self.parallel)
              except ValueError:
                  raise DistutilsOptionError("parallel should be an integer")
  
      def run(self):
          # Run all relevant sub-commands.  This will be some subset of:
          #  - build_py      - pure Python modules
          #  - build_clib    - standalone C libraries
          #  - build_ext     - Python extensions
          #  - build_scripts - (Python) scripts
          for cmd_name in self.get_sub_commands():
              self.run_command(cmd_name)
  
  
      # -- Predicates for the sub-command list ---------------------------
  
      def has_pure_modules(self):
          return self.distribution.has_pure_modules()
  
      def has_c_libraries(self):
          return self.distribution.has_c_libraries()
  
      def has_ext_modules(self):
          return self.distribution.has_ext_modules()
  
      def has_scripts(self):
          return self.distribution.has_scripts()
  
  
      sub_commands = [('build_py',      has_pure_modules),
                      ('build_clib',    has_c_libraries),
                      ('build_ext',     has_ext_modules),
                      ('build_scripts', has_scripts),
                     ]
  