config/nsinstall.py

   1 # This Source Code Form is subject to the terms of the Mozilla Public
   2 # License, v. 2.0. If a copy of the MPL was not distributed with this
   3 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
   4
   5 # This is a partial python port of nsinstall.
   6 # It's intended to be used when there's no natively compile nsinstall
   7 # available, and doesn't intend to be fully equivalent.
   8 # Its major use is for l10n repackaging on systems that don't have
   9 # a full build environment set up.
  10 # The basic limitation is, it doesn't even try to link and ignores
  11 # all related options.
  12 from __future__ import print_function
  13 from optparse import OptionParser
  14 import os
  15 import os.path
  16 import sys
  17 import shutil
  18 import stat
  19
  20 def _nsinstall_internal(argv):
  21   usage = "usage: %prog [options] arg1 [arg2 ...] target-directory"
  22   p = OptionParser(usage=usage)
  23
  24   p.add_option('-D', action="store_true",
  25                help="Create a single directory only")
  26   p.add_option('-t', action="store_true",
  27                help="Preserve time stamp")
  28   p.add_option('-m', action="store",
  29                help="Set mode", metavar="mode")
  30   p.add_option('-d', action="store_true",
  31                help="Create directories in target")
  32   p.add_option('-R', action="store_true",
  33                help="Use relative symbolic links (ignored)")
  34   p.add_option('-L', action="store", metavar="linkprefix",
  35                help="Link prefix (ignored)")
  36   p.add_option('-X', action="append", metavar="file",
  37                help="Ignore a file when installing a directory recursively.")
  38
  39   # The remaining arguments are not used in our tree, thus they're not
  40   # implented.
  41   def BadArg(option, opt, value, parser):
  42     parser.error('option not supported: {0}'.format(opt))
  43
  44   p.add_option('-C', action="callback", metavar="CWD",
  45                callback=BadArg,
  46                help="NOT SUPPORTED")
  47   p.add_option('-o', action="callback", callback=BadArg,
  48                help="Set owner (NOT SUPPORTED)", metavar="owner")
  49   p.add_option('-g', action="callback", callback=BadArg,
  50                help="Set group (NOT SUPPORTED)", metavar="group")
  51
  52   (options, args) = p.parse_args(argv)
  53
  54   if options.m:
  55     # mode is specified
  56     try:
  57       options.m = int(options.m, 8)
  58     except:
  59       sys.stderr.write('nsinstall: {0} is not a valid mode\n'
  60                        .format(options.m))
  61       return 1
  62
  63   # just create one directory?
  64   def maybe_create_dir(dir, mode, try_again):
  65     dir = os.path.abspath(dir)
  66     if os.path.exists(dir):
  67       if not os.path.isdir(dir):
  68         print('nsinstall: {0} is not a directory'.format(dir), file=sys.stderr)
  69         return 1
  70       if mode:
  71         os.chmod(dir, mode)
  72       return 0
  73
  74     try:
  75       if mode:
  76         os.makedirs(dir, mode)
  77       else:
  78         os.makedirs(dir)
  79     except Exception as e:
  80       # We might have hit EEXIST due to a race condition (see bug 463411) -- try again once
  81       if try_again:
  82         return maybe_create_dir(dir, mode, False)
  83       print("nsinstall: failed to create directory {0}: {1}".format(dir, e))
  84       return 1
  85     else:
  86       return 0
  87
  88   if options.X:
  89     options.X = [os.path.abspath(p) for p in options.X]
  90
  91   if options.D:
  92     return maybe_create_dir(args[0], options.m, True)
  93
  94   # nsinstall arg1 [...] directory
  95   if len(args) < 2:
  96     p.error('not enough arguments')
  97
  98   def copy_all_entries(entries, target):
  99     for e in entries:
 100       e = os.path.abspath(e)
 101       if options.X and e in options.X:
 102         continue
 103
 104       dest = os.path.join(target, os.path.basename(e))
 105       dest = os.path.abspath(dest)
 106       handleTarget(e, dest)
 107       if options.m:
 108         os.chmod(dest, options.m)
 109
 110   # set up handler
 111   if options.d:
 112     # we're supposed to create directories
 113     def handleTarget(srcpath, targetpath):
 114       # target directory was already created, just use mkdir
 115       os.mkdir(targetpath)
 116   else:
 117     # we're supposed to copy files
 118     def handleTarget(srcpath, targetpath):
 119       if os.path.isdir(srcpath):
 120         if not os.path.exists(targetpath):
 121           os.mkdir(targetpath)
 122         entries = [os.path.join(srcpath, e) for e in os.listdir(srcpath)]
 123         copy_all_entries(entries, targetpath)
 124         # options.t is not relevant for directories
 125         if options.m:
 126           os.chmod(targetpath, options.m)
 127       else:
 128         if os.path.exists(targetpath):
 129           # On Windows, read-only files can't be deleted
 130           os.chmod(targetpath, stat.S_IWUSR)
 131           os.remove(targetpath)
 132         if options.t:
 133           shutil.copy2(srcpath, targetpath)
 134         else:
 135           shutil.copy(srcpath, targetpath)
 136
 137   # the last argument is the target directory
 138   target = args.pop()
 139   # ensure target directory (importantly, we do not apply a mode to the directory
 140   # because we want to copy files into it and the mode might be read-only)
 141   rv = maybe_create_dir(target, None, True)
 142   if rv != 0:
 143     return rv
 144
 145   copy_all_entries(args, target)
 146   return 0
 147
 148 # nsinstall as a native command is always UTF-8
 149 def nsinstall(argv):
 150   return _nsinstall_internal([unicode(arg, "utf-8") for arg in argv])
 151
 152 if __name__ == '__main__':
 153   # sys.argv corrupts characters outside the system code page on Windows
 154   # <http://bugs.python.org/issue2128>. Use ctypes instead. This is also
 155   # useful because switching to Unicode strings makes python use the wide
 156   # Windows APIs, which is what we want here since the wide APIs normally do a
 157   # better job at handling long paths and such.
 158   if sys.platform == "win32":
 159     import ctypes
 160     from ctypes import wintypes
 161     GetCommandLine = ctypes.windll.kernel32.GetCommandLineW
 162     GetCommandLine.argtypes = []
 163     GetCommandLine.restype = wintypes.LPWSTR
 164
 165     CommandLineToArgv = ctypes.windll.shell32.CommandLineToArgvW
 166     CommandLineToArgv.argtypes = [wintypes.LPWSTR, ctypes.POINTER(ctypes.c_int)]
 167     CommandLineToArgv.restype = ctypes.POINTER(wintypes.LPWSTR)
 168
 169     argc = ctypes.c_int(0)
 170     argv_arr = CommandLineToArgv(GetCommandLine(), ctypes.byref(argc))
 171     # The first argv will be "python", the second will be the .py file
 172     argv = argv_arr[1:argc.value]
 173   else:
 174     # For consistency, do it on Unix as well
 175     if sys.stdin.encoding is not None:
 176       argv = [unicode(arg, sys.stdin.encoding) for arg in sys.argv]
 177     else:
 178       argv = [unicode(arg) for arg in sys.argv]
 179
 180   sys.exit(_nsinstall_internal(argv[1:]))