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Text File  |  2004-11-18  |  5KB  |  132 lines
  1. """distutils.command.build_scripts
  2.  
  3. Implements the Distutils 'build_scripts' command."""
  4.  
  5. # This module should be kept compatible with Python 2.1.
  6.  
  7. __revision__ = "$Id: build_scripts.py,v 1.25 2004/11/10 22:23:15 loewis Exp $"
  8.  
  9. import sys, os, re
  10. from stat import ST_MODE
  11. from distutils import sysconfig
  12. from distutils.core import Command
  13. from distutils.dep_util import newer
  14. from distutils.util import convert_path
  15. from distutils import log
  16.  
  17. # check if Python is called on the first line with this expression
  18. first_line_re = re.compile('^#!.*python[0-9.]*([ \t].*)?$')
  19.  
  20. class build_scripts (Command):
  21.  
  22.     description = "\"build\" scripts (copy and fixup #! line)"
  23.  
  24.     user_options = [
  25.         ('build-dir=', 'd', "directory to \"build\" (copy) to"),
  26.         ('force', 'f', "forcibly build everything (ignore file timestamps"),
  27.         ('executable=', 'e', "specify final destination interpreter path"),
  28.         ]
  29.  
  30.     boolean_options = ['force']
  31.  
  32.  
  33.     def initialize_options (self):
  34.         self.build_dir = None
  35.         self.scripts = None
  36.         self.force = None
  37.         self.executable = None
  38.         self.outfiles = None
  39.  
  40.     def finalize_options (self):
  41.         self.set_undefined_options('build',
  42.                                    ('build_scripts', 'build_dir'),
  43.                                    ('force', 'force'),
  44.                                    ('executable', 'executable'))
  45.         self.scripts = self.distribution.scripts
  46.  
  47.     def get_source_files(self):
  48.         return self.scripts
  49.  
  50.     def run (self):
  51.         if not self.scripts:
  52.             return
  53.         self.copy_scripts()
  54.  
  55.  
  56.     def copy_scripts (self):
  57.         """Copy each script listed in 'self.scripts'; if it's marked as a
  58.         Python script in the Unix way (first line matches 'first_line_re',
  59.         ie. starts with "\#!" and contains "python"), then adjust the first
  60.         line to refer to the current Python interpreter as we copy.
  61.         """
  62.         self.mkpath(self.build_dir)
  63.         outfiles = []
  64.         for script in self.scripts:
  65.             adjust = 0
  66.             script = convert_path(script)
  67.             outfile = os.path.join(self.build_dir, os.path.basename(script))
  68.             outfiles.append(outfile)
  69.  
  70.             if not self.force and not newer(script, outfile):
  71.                 log.debug("not copying %s (up-to-date)", script)
  72.                 continue
  73.  
  74.             # Always open the file, but ignore failures in dry-run mode --
  75.             # that way, we'll get accurate feedback if we can read the
  76.             # script.
  77.             try:
  78.                 f = open(script, "r")
  79.             except IOError:
  80.                 if not self.dry_run:
  81.                     raise
  82.                 f = None
  83.             else:
  84.                 first_line = f.readline()
  85.                 if not first_line:
  86.                     self.warn("%s is an empty file (skipping)" % script)
  87.                     continue
  88.  
  89.                 match = first_line_re.match(first_line)
  90.                 if match:
  91.                     adjust = 1
  92.                     post_interp = match.group(1) or ''
  93.  
  94.             if adjust:
  95.                 log.info("copying and adjusting %s -> %s", script,
  96.                          self.build_dir)
  97.                 if not self.dry_run:
  98.                     outf = open(outfile, "w")
  99.                     if not sysconfig.python_build:
  100.                         outf.write("#!%s%s\n" %
  101.                                    (self.executable,
  102.                                     post_interp))
  103.                     else:
  104.                         outf.write("#!%s%s\n" %
  105.                                    (os.path.join(
  106.                             sysconfig.get_config_var("BINDIR"),
  107.                             "python" + sysconfig.get_config_var("EXE")),
  108.                                     post_interp))
  109.                     outf.writelines(f.readlines())
  110.                     outf.close()
  111.                 if f:
  112.                     f.close()
  113.             else:
  114.                 f.close()
  115.                 self.copy_file(script, outfile)
  116.  
  117.         if os.name == 'posix':
  118.             for file in outfiles:
  119.                 if self.dry_run:
  120.                     log.info("changing mode of %s", file)
  121.                 else:
  122.                     oldmode = os.stat(file)[ST_MODE] & 07777
  123.                     newmode = (oldmode | 0555) & 07777
  124.                     if newmode != oldmode:
  125.                         log.info("changing mode of %s from %o to %o",
  126.                                  file, oldmode, newmode)
  127.                         os.chmod(file, newmode)
  128.  
  129.     # copy_scripts ()
  130.  
  131. # class build_scripts
  132.