text: #!/usr/bin/env python
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  """bootstrap.py
  
  Execute SCons from this source tree. It copies Python scripts and modules
  from src/ subdirectory into a subdirectory named "bootstrap/" (by default),
  and executes SCons from there with the supplied command-line arguments.
  
  This is a minimal build of SCons to bootstrap the full build of all the
  packages, as specified in our local SConstruct file.
  
  Some options are specific to this bootstrap.py script and are *not* passed
  on to the SCons script. All of these begin with the string "bootstrap_":
  
      --bootstrap_dir=DIR
  
          Sets the name of the directory into which the SCons files will
          be copied.  The default is "bootstrap" in the local subdirectory.
  
      --bootstrap_force
  
          Forces a copy of all necessary files.  By default, the
          bootstrap.py script only updates the bootstrap copy if the
          content of the source copy is different.
  
      --bootstrap_src=DIR
  
          Searches for the SCons files relative to the specified DIR,
          then relative to the directory in which this bootstrap.py
          script is found.
  
      --bootstrap_update
  
          Only updates the bootstrap subdirectory, and then exits.
  
  In addition to the above, the bootstrap.py script understands
  the following SCons options:
  
      -C, --directory
  
          Changes to the specified directory before invoking SCons.
          Because we change directory right away to the specified directory,
          the SCons script itself doesn't need to, so this option gets
          "eaten" by the bootstrap.py script.
  """
  
  import os
  import os.path
  import sys
  import glob
  import subprocess
  import filecmp
  import shutil
  
  def parseManifestLines(basedir, manifest):
      """
      Scans a MANIFEST file, and returns the list of source files.
  
      Has basic support for recursive globs '**',
      filename wildcards of the form '*.xml' and
      comment lines, starting with a '#'.
  
      :param basedir: base path to find files in. Note this does not
                      run in an SCons context so path must not need
                      further processing (e.g. no '#' signs)
      :param manifest: path to manifest file
      :returns: list of files
      """
      sources = []
      basewd = os.path.abspath(basedir)
      with open(manifest) as m:
          lines = m.readlines()
      for l in lines:
          if l.startswith('#'):
              # Skip comments
              continue
          l = l.rstrip('\n')
          if l.endswith('**'):
              # Glob all files recursively
              globwd = os.path.dirname(os.path.join(basewd, l))
              for path, dirs, files in os.walk(globwd):
                  for f in files:
                      fpath = os.path.join(globwd, path, f)
                      sources.append(os.path.relpath(fpath, basewd))
          elif '*' in l:
              # Glob file pattern
              files = glob.glob(os.path.join(basewd, l))
              for f in files:
                  sources.append(os.path.relpath(f, basewd))
          else:
              sources.append(l)
  
      return sources
  
  def main():
      script_dir = os.path.abspath(os.path.dirname(__file__))
  
      bootstrap_dir = os.path.join(script_dir, 'bootstrap')
  
      pass_through_args = []
      update_only = None
  
      requires_an_argument = 'bootstrap.py:  %s requires an argument\n'
  
      search = [script_dir]
  
      def find(filename, search=search):
          for dir_name in search:
              filepath = os.path.join(dir_name, filename)
              if os.path.exists(filepath):
                  return os.path.normpath(filepath)
          sys.stderr.write("could not find `%s' in search path:\n" % filename)
          sys.stderr.write("\t" + "\n\t".join(search) + "\n")
          sys.exit(2)
  
      def must_copy(dst, src):
          if not os.path.exists(dst):
              return 1
          return not filecmp.cmp(dst,src)
  
      # Note:  We don't use the getopt module to process the command-line
      # arguments because we'd have to teach it about all of the SCons options.
  
      command_line_args = sys.argv[1:]
  
      while command_line_args:
          arg = command_line_args.pop(0)
  
          if arg == '--bootstrap_dir':
              try:
                  bootstrap_dir = command_line_args.pop(0)
              except IndexError:
                  sys.stderr.write(requires_an_argument % arg)
                  sys.exit(1)
          elif arg[:16] == '--bootstrap_dir=':
              bootstrap_dir = arg[16:]
          elif arg == '--bootstrap_force':
              def must_copy(dst, src):
                  return 1
          elif arg == '--bootstrap_src':
              try:
                  search.insert(0, command_line_args.pop(0))
              except IndexError:
                  sys.stderr.write(requires_an_argument % arg)
                  sys.exit(1)
          elif arg[:16] == '--bootstrap_src=':
              search.insert(0, arg[16:])
          elif arg == '--bootstrap_update':
              update_only = 1
          elif arg in ('-C', '--directory'):
              try:
                  dir = command_line_args.pop(0)
              except IndexError:
                  sys.stderr.write(requires_an_argument % arg)
                  sys.exit(1)
              else:
                  os.chdir(dir)
          elif arg[:2] == '-C':
              os.chdir(arg[2:])
          elif arg[:12] == '--directory=':
              os.chdir(arg[12:])
          else:
              pass_through_args.append(arg)
  
      scons_py = os.path.join('scripts', 'scons.py')
      src_engine = os.path.join('src', 'engine')
      MANIFEST_in = find(os.path.join(src_engine, 'MANIFEST.in'))
      manifest_files = [os.path.join(src_engine, x)
                        for x in parseManifestLines(os.path.join(script_dir, src_engine),
                                                    MANIFEST_in)]
  
      files = [scons_py] + manifest_files
  
      for filename in files:
          src = find(filename)
          dst = os.path.join(bootstrap_dir, filename)
          if must_copy(dst, src):
              dir = os.path.split(dst)[0]
              if not os.path.isdir(dir):
                  os.makedirs(dir)
              try:
                  os.unlink(dst)
              except Exception as e:
                  pass
  
              shutil.copyfile(src, dst)
  
      if update_only:
          sys.exit(0)
  
      args = [sys.executable, os.path.join(bootstrap_dir, scons_py)] + pass_through_args
  
      sys.stdout.write(" ".join(args) + '\n')
      sys.stdout.flush()
  
      os.environ['SCONS_LIB_DIR'] = os.path.join(bootstrap_dir, src_engine)
  
      sys.exit(subprocess.Popen(args, env=os.environ).wait())
  
  
  if __name__ == "__main__":
      print("Please use")
      print("python scripts/scons.py")
      print("Instead of python bootstrap.py. Bootstrap.py is obsolete")
      sys.exit(-1)
      main()
  
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