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Text File  |  2003-12-30  |  4KB  |  127 lines
  1. """distutils.command.build_scripts
  2.  
  3. Implements the Distutils 'build_scripts' command."""
  4.  
  5. # This module should be kept compatible with Python 1.5.2.
  6.  
  7. __revision__ = "$Id: build_scripts.py,v 1.21 2003/06/27 19:33:38 niemeyer 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.         ]
  28.  
  29.     boolean_options = ['force']
  30.  
  31.  
  32.     def initialize_options (self):
  33.         self.build_dir = None
  34.         self.scripts = None
  35.         self.force = None
  36.         self.outfiles = None
  37.  
  38.     def finalize_options (self):
  39.         self.set_undefined_options('build',
  40.                                    ('build_scripts', 'build_dir'),
  41.                                    ('force', 'force'))
  42.         self.scripts = self.distribution.scripts
  43.  
  44.  
  45.     def run (self):
  46.         if not self.scripts:
  47.             return
  48.         self.copy_scripts()
  49.  
  50.  
  51.     def copy_scripts (self):
  52.         """Copy each script listed in 'self.scripts'; if it's marked as a
  53.         Python script in the Unix way (first line matches 'first_line_re',
  54.         ie. starts with "\#!" and contains "python"), then adjust the first
  55.         line to refer to the current Python interpreter as we copy.
  56.         """
  57.         self.mkpath(self.build_dir)
  58.         outfiles = []
  59.         for script in self.scripts:
  60.             adjust = 0
  61.             script = convert_path(script)
  62.             outfile = os.path.join(self.build_dir, os.path.basename(script))
  63.             outfiles.append(outfile)
  64.  
  65.             if not self.force and not newer(script, outfile):
  66.                 log.debug("not copying %s (up-to-date)", script)
  67.                 continue
  68.  
  69.             # Always open the file, but ignore failures in dry-run mode --
  70.             # that way, we'll get accurate feedback if we can read the
  71.             # script.
  72.             try:
  73.                 f = open(script, "r")
  74.             except IOError:
  75.                 if not self.dry_run:
  76.                     raise
  77.                 f = None
  78.             else:
  79.                 first_line = f.readline()
  80.                 if not first_line:
  81.                     self.warn("%s is an empty file (skipping)" % script)
  82.                     continue
  83.  
  84.                 match = first_line_re.match(first_line)
  85.                 if match:
  86.                     adjust = 1
  87.                     post_interp = match.group(1) or ''
  88.  
  89.             if adjust:
  90.                 log.info("copying and adjusting %s -> %s", script,
  91.                          self.build_dir)
  92.                 if not self.dry_run:
  93.                     outf = open(outfile, "w")
  94.                     if not sysconfig.python_build:
  95.                         outf.write("#!%s%s\n" % 
  96.                                    (os.path.normpath(sys.executable),
  97.                                     post_interp))
  98.                     else:
  99.                         outf.write("#!%s%s\n" %
  100.                                    (os.path.join(
  101.                             sysconfig.get_config_var("BINDIR"),
  102.                             "python" + sysconfig.get_config_var("EXE")),
  103.                                     post_interp))
  104.                     outf.writelines(f.readlines())
  105.                     outf.close()
  106.                 if f:
  107.                     f.close()
  108.             else:
  109.                 f.close()
  110.                 self.copy_file(script, outfile)
  111.  
  112.         if os.name == 'posix':
  113.             for file in outfiles:
  114.                 if self.dry_run:
  115.                     log.info("changing mode of %s", file)
  116.                 else:
  117.                     oldmode = os.stat(file)[ST_MODE] & 07777
  118.                     newmode = (oldmode | 0555) & 07777
  119.                     if newmode != oldmode:
  120.                         log.info("changing mode of %s from %o to %o",
  121.                                  file, oldmode, newmode)
  122.                         os.chmod(file, newmode)
  123.  
  124.     # copy_scripts ()
  125.  
  126. # class build_scripts
  127.