text: """distutils.command.build_scripts
  
  Implements the Distutils 'build_scripts' command."""
  
  __revision__ = "$Id$"
  
  import os, re
  from stat import ST_MODE
  from distutils.core import Command
  from distutils.dep_util import newer
  from distutils.util import convert_path
  from distutils import log
  
  # check if Python is called on the first line with this expression
  first_line_re = re.compile('^#!.*python[0-9.]*([ \t].*)?$')
  
  class build_scripts (Command):
  
      description = "\"build\" scripts (copy and fixup #! line)"
  
      user_options = [
          ('build-dir=', 'd', "directory to \"build\" (copy) to"),
          ('force', 'f', "forcibly build everything (ignore file timestamps"),
          ('executable=', 'e', "specify final destination interpreter path"),
          ]
  
      boolean_options = ['force']
  
  
      def initialize_options (self):
          self.build_dir = None
          self.scripts = None
          self.force = None
          self.executable = None
          self.outfiles = None
  
      def finalize_options (self):
          self.set_undefined_options('build',
                                     ('build_scripts', 'build_dir'),
                                     ('force', 'force'),
                                     ('executable', 'executable'))
          self.scripts = self.distribution.scripts
  
      def get_source_files(self):
          return self.scripts
  
      def run (self):
          if not self.scripts:
              return
          self.copy_scripts()
  
  
      def copy_scripts (self):
          """Copy each script listed in 'self.scripts'; if it's marked as a
          Python script in the Unix way (first line matches 'first_line_re',
          ie. starts with "\#!" and contains "python"), then adjust the first
          line to refer to the current Python interpreter as we copy.
          """
          _sysconfig = __import__('sysconfig')
          self.mkpath(self.build_dir)
          outfiles = []
          for script in self.scripts:
              adjust = 0
              script = convert_path(script)
              outfile = os.path.join(self.build_dir, os.path.basename(script))
              outfiles.append(outfile)
  
              if not self.force and not newer(script, outfile):
                  log.debug("not copying %s (up-to-date)", script)
                  continue
  
              # Always open the file, but ignore failures in dry-run mode --
              # that way, we'll get accurate feedback if we can read the
              # script.
              try:
                  f = open(script, "r")
              except IOError:
                  if not self.dry_run:
                      raise
                  f = None
              else:
                  first_line = f.readline()
                  if not first_line:
                      self.warn("%s is an empty file (skipping)" % script)
                      continue
  
                  match = first_line_re.match(first_line)
                  if match:
                      adjust = 1
                      post_interp = match.group(1) or ''
  
              if adjust:
                  log.info("copying and adjusting %s -> %s", script,
                           self.build_dir)
                  if not self.dry_run:
                      outf = open(outfile, "w")
                      if not _sysconfig.is_python_build():
                          outf.write("#!%s%s\n" %
                                     (self.executable,
                                      post_interp))
                      else:
                          outf.write("#!%s%s\n" %
                                     (os.path.join(
                              _sysconfig.get_config_var("BINDIR"),
                             "python%s%s" % (_sysconfig.get_config_var("VERSION"),
                                             _sysconfig.get_config_var("EXE"))),
                                      post_interp))
                      outf.writelines(f.readlines())
                      outf.close()
                  if f:
                      f.close()
              else:
                  if f:
                      f.close()
                  self.copy_file(script, outfile)
  
          if os.name == 'posix':
              for file in outfiles:
                  if self.dry_run:
                      log.info("changing mode of %s", file)
                  else:
                      oldmode = os.stat(file)[ST_MODE] & 07777
                      newmode = (oldmode | 0555) & 07777
                      if newmode != oldmode:
                          log.info("changing mode of %s from %o to %o",
                                   file, oldmode, newmode)
                          os.chmod(file, newmode)
  
      # copy_scripts ()
  
  # class build_scripts
  