text: # created 1999/03/13, Greg Ward
  
  __revision__ = "$Id: install_lib.py,v 1.38 2001/12/06 20:57:12 fdrake Exp $"
  
  import sys, os, string
  from types import IntType
  from distutils.core import Command
  from distutils.errors import DistutilsOptionError
  from distutils.dir_util import copy_tree
  
  class install_lib (Command):
  
      description = "install all Python modules (extensions and pure Python)"
  
      # The byte-compilation options are a tad confusing.  Here are the
      # possible scenarios:
      #   1) no compilation at all (--no-compile --no-optimize)
      #   2) compile .pyc only (--compile --no-optimize; default)
      #   3) compile .pyc and "level 1" .pyo (--compile --optimize)
      #   4) compile "level 1" .pyo only (--no-compile --optimize)
      #   5) compile .pyc and "level 2" .pyo (--compile --optimize-more)
      #   6) compile "level 2" .pyo only (--no-compile --optimize-more)
      #
      # The UI for this is two option, 'compile' and 'optimize'.
      # 'compile' is strictly boolean, and only decides whether to
      # generate .pyc files.  'optimize' is three-way (0, 1, or 2), and
      # decides both whether to generate .pyo files and what level of
      # optimization to use.
  
      user_options = [
          ('install-dir=', 'd', "directory to install to"),
          ('build-dir=','b', "build directory (where to install from)"),
          ('force', 'f', "force installation (overwrite existing files)"),
          ('compile', 'c', "compile .py to .pyc [default]"),
          ('no-compile', None, "don't compile .py files"),
          ('optimize=', 'O',
           "also compile with optimization: -O1 for \"python -O\", "
           "-O2 for \"python -OO\", and -O0 to disable [default: -O0]"),
          ('skip-build', None, "skip the build steps"),
          ]
  
      boolean_options = ['force', 'compile', 'skip-build']
      negative_opt = {'no-compile' : 'compile'}
  
  
      def initialize_options (self):
          # let the 'install' command dictate our installation directory
          self.install_dir = None
          self.build_dir = None
          self.force = 0
          self.compile = None
          self.optimize = None
          self.skip_build = None
  
      def finalize_options (self):
  
          # Get all the information we need to install pure Python modules
          # from the umbrella 'install' command -- build (source) directory,
          # install (target) directory, and whether to compile .py files.
          self.set_undefined_options('install',
                                     ('build_lib', 'build_dir'),
                                     ('install_lib', 'install_dir'),
                                     ('force', 'force'),
                                     ('compile', 'compile'),
                                     ('optimize', 'optimize'),
                                     ('skip_build', 'skip_build'),
                                    )
  
          if self.compile is None:
              self.compile = 1
          if self.optimize is None:
              self.optimize = 0
  
          if type(self.optimize) is not IntType:
              try:
                  self.optimize = int(self.optimize)
                  assert 0 <= self.optimize <= 2
              except (ValueError, AssertionError):
                  raise DistutilsOptionError, "optimize must be 0, 1, or 2"
  
      def run (self):
  
          # Make sure we have built everything we need first
          self.build()
  
          # Install everything: simply dump the entire contents of the build
          # directory to the installation directory (that's the beauty of
          # having a build directory!)
          outfiles = self.install()
  
          # (Optionally) compile .py to .pyc
          if outfiles is not None and self.distribution.has_pure_modules():
              self.byte_compile(outfiles)
  
      # run ()
  
  
      # -- Top-level worker functions ------------------------------------
      # (called from 'run()')
  
      def build (self):
          if not self.skip_build:
              if self.distribution.has_pure_modules():
                  self.run_command('build_py')
              if self.distribution.has_ext_modules():
                  self.run_command('build_ext')
  
      def install (self):
          if os.path.isdir(self.build_dir):
              outfiles = self.copy_tree(self.build_dir, self.install_dir)
          else:
              self.warn("'%s' does not exist -- no Python modules to install" %
                        self.build_dir)
              return
          return outfiles
  
      def byte_compile (self, files):
          from distutils.util import byte_compile
  
          # Get the "--root" directory supplied to the "install" command,
          # and use it as a prefix to strip off the purported filename
          # encoded in bytecode files.  This is far from complete, but it
          # should at least generate usable bytecode in RPM distributions.
          install_root = self.get_finalized_command('install').root
  
          if self.compile:
              byte_compile(files, optimize=0,
                           force=self.force,
                           prefix=install_root,
                           verbose=self.verbose, dry_run=self.dry_run)
          if self.optimize > 0:
              byte_compile(files, optimize=self.optimize,
                           force=self.force,
                           prefix=install_root,
                           verbose=self.verbose, dry_run=self.dry_run)
  
  
      # -- Utility methods -----------------------------------------------
  
      def _mutate_outputs (self, has_any, build_cmd, cmd_option, output_dir):
  
          if not has_any:
              return []
  
          build_cmd = self.get_finalized_command(build_cmd)
          build_files = build_cmd.get_outputs()
          build_dir = getattr(build_cmd, cmd_option)
  
          prefix_len = len(build_dir) + len(os.sep)
          outputs = []
          for file in build_files:
              outputs.append(os.path.join(output_dir, file[prefix_len:]))
  
          return outputs
  
      # _mutate_outputs ()
  
      def _bytecode_filenames (self, py_filenames):
          bytecode_files = []
          for py_file in py_filenames:
              if self.compile:
                  bytecode_files.append(py_file + "c")
              if self.optimize > 0:
                  bytecode_files.append(py_file + "o")
  
          return bytecode_files
  
  
      # -- External interface --------------------------------------------
      # (called by outsiders)
  
      def get_outputs (self):
          """Return the list of files that would be installed if this command
          were actually run.  Not affected by the "dry-run" flag or whether
          modules have actually been built yet.
          """
          pure_outputs = \
              self._mutate_outputs(self.distribution.has_pure_modules(),
                                   'build_py', 'build_lib',
                                   self.install_dir)
          if self.compile:
              bytecode_outputs = self._bytecode_filenames(pure_outputs)
          else:
              bytecode_outputs = []
  
          ext_outputs = \
              self._mutate_outputs(self.distribution.has_ext_modules(),
                                   'build_ext', 'build_lib',
                                   self.install_dir)
  
          return pure_outputs + bytecode_outputs + ext_outputs
  
      # get_outputs ()
  
      def get_inputs (self):
          """Get the list of files that are input to this command, ie. the
          files that get installed as they are named in the build tree.
          The files in this list correspond one-to-one to the output
          filenames returned by 'get_outputs()'.
          """
          inputs = []
  
          if self.distribution.has_pure_modules():
              build_py = self.get_finalized_command('build_py')
              inputs.extend(build_py.get_outputs())
  
          if self.distribution.has_ext_modules():
              build_ext = self.get_finalized_command('build_ext')
              inputs.extend(build_ext.get_outputs())
  
          return inputs
  
  # class install_lib
  