l4/pkg/python/contrib/Lib/distutils/command/build_scripts.py

   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 69599 2009-02-13 23:02:44Z tarek.ziade $"
   8
   9 import os, re
  10 from stat import ST_MODE
  11 from distutils import sysconfig
  12 from distutils.core import Command
  13 from distutils.dep_util import newer
  14 from distutils.util import convert_path
  15 from distutils import log
  16
  17 # check if Python is called on the first line with this expression
  18 first_line_re = re.compile('^#!.*python[0-9.]*([ \t].*)?$')
  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%s%s" % (sysconfig.get_config_var("VERSION"),
 108                                            sysconfig.get_config_var("EXE"))),
 109                                     post_interp))
 110                     outf.writelines(f.readlines())
 111                     outf.close()
 112                 if f:
 113                     f.close()
 114             else:
 115                 if f:
 116                     f.close()
 117                 self.copy_file(script, outfile)
 118
 119         if os.name == 'posix':
 120             for file in outfiles:
 121                 if self.dry_run:
 122                     log.info("changing mode of %s", file)
 123                 else:
 124                     oldmode = os.stat(file)[ST_MODE] & 07777
 125                     newmode = (oldmode | 0555) & 07777
 126                     if newmode != oldmode:
 127                         log.info("changing mode of %s from %o to %o",
 128                                  file, oldmode, newmode)
 129                         os.chmod(file, newmode)
 130
 131     # copy_scripts ()
 132
 133 # class build_scripts