mdw@git.distorted.org.uk Git - chopwood/blob - agpl.py

   1 ### -*-python-*-
   2 ###
   3 ### GNU Affero General Public License compliance
   4 ###
   5 ### (c) 2013 Mark Wooding
   6 ###
   7
   8 ###----- Licensing notice ---------------------------------------------------
   9 ###
  10 ### This file is part of Chopwood: a password-changing service.
  11 ###
  12 ### Chopwood is free software; you can redistribute it and/or modify
  13 ### it under the terms of the GNU Affero General Public License as
  14 ### published by the Free Software Foundation; either version 3 of the
  15 ### License, or (at your option) any later version.
  16 ###
  17 ### Chopwood is distributed in the hope that it will be useful,
  18 ### but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ### GNU Affero General Public License for more details.
  21 ###
  22 ### You should have received a copy of the GNU Affero General Public
  23 ### License along with Chopwood; if not, see
  24 ### <http://www.gnu.org/licenses/>.
  25
  26 import contextlib as CTX
  27 import grp as GR
  28 import os as OS
  29 import pwd as PW
  30 import shlex as SL
  31 import shutil as SH
  32 import subprocess as SUB
  33 import sys as SYS
  34 import tarfile as TAR
  35 import tempfile as TF
  36 import time as T
  37
  38 from cStringIO import StringIO
  39
  40 from auto import PACKAGE, VERSION
  41 import util as U
  42
  43 @CTX.contextmanager
  44 def tempdir():
  45   d = TF.mkdtemp()
  46   try: yield d
  47   finally: SH.rmtree(d, ignore_errors = True)
  48
  49 def dirs_to_dump():
  50   dirs = set()
  51   for m in SYS.modules.itervalues():
  52     try: f = m.__file__
  53     except AttributeError: continue
  54     d = OS.path.realpath(OS.path.dirname(f))
  55     if d.startswith('/usr/') and not d.startswith('/usr/local/'): continue
  56     dirs.add(d)
  57   dirs = sorted(dirs)
  58   last = '!'
  59   dump = []
  60   for d in dirs:
  61     if d.startswith(last): continue
  62     dump.append(d)
  63     last = d
  64   return dump
  65
  66 def exists_subdir(subdir):
  67   return lambda dir: OS.path.isdir(OS.path.join(dir, subdir))
  68
  69 def filez(cmd):
  70   def _(dir):
  71     kid = SUB.Popen(SL.split(cmd), stdout = SUB.PIPE, cwd = dir)
  72     left = ''
  73     while True:
  74       buf = kid.stdout.read(16384)
  75       if not buf: break
  76       buf = left + buf
  77       i = 0
  78       while True:
  79         z = buf.find('\0', i)
  80         if z < 0: break
  81         f = buf[i:z]
  82         if f.startswith('./'): f = f[2:]
  83         yield f
  84         i = z + 1
  85       left = buf[i:]
  86     if left:
  87       raise U.ExpectedError, \
  88             (500, "trailing junk from `%s' in `%s'" % (cmd, dir))
  89   return _
  90
  91 DUMPERS = [
  92   (exists_subdir('.git'), [filez('git ls-files -coz --exclude-standard'),
  93                            filez('find .git -print0')]),
  94   (lambda d: True, [filez('find . ( ! -perm +004 -prune ) -o -print0')])]
  95
  96 def dump_dir(dir, tf, root):
  97   for test, listers in DUMPERS:
  98     if test(dir): break
  99   else:
 100     raise U.ExpectedError, (500, "no dumper for `%s'" % dir)
 101   for lister in listers:
 102     base = OS.path.basename(dir)
 103     for file in lister(dir):
 104       tf.add(OS.path.join(dir, file), OS.path.join(root, base, file),
 105              recursive = False)
 106
 107 def source(out):
 108   if SYS.version_info >= (2, 6):
 109     tf = TAR.open(fileobj = out, mode = 'w|gz', format = TAR.USTAR_FORMAT)
 110   else:
 111     tf = TAR.open(fileobj = out, mode = 'w|gz')
 112     tf.posix = True
 113   root = '%s-%s' % (PACKAGE, VERSION)
 114   seen = set()
 115   dirmap = []
 116   festout = StringIO()
 117   for dir in dirs_to_dump():
 118     dir = dir.rstrip('/')
 119     base = OS.path.basename(dir)
 120     if base not in seen:
 121       name = base
 122     else:
 123       for i in I.count():
 124         name = '%s.%d' % (base, i)
 125         if name not in seen: break
 126     dirmap.append((dir + '/', name))
 127     festout.write('%s = %s\n' % (name, dir))
 128   fest = festout.getvalue()
 129   ti = TAR.TarInfo(OS.path.join(root, 'MANIFEST'))
 130   ti.size = len(fest)
 131   ti.mtime = T.time()
 132   ti.mode = 0664
 133   ti.type = TAR.REGTYPE
 134   uid = OS.getuid(); ti.uid, ti.uname = uid, PW.getpwuid(uid).pw_name
 135   gid = OS.getgid(); ti.gid, ti.gname = gid, GR.getgrgid(gid).gr_name
 136   tf.addfile(ti, fileobj = StringIO(fest))
 137   for dir, name in dirmap:
 138     dump_dir(dir, tf, root)
 139   tf.close()
 140
 141 ###----- That's all, folks --------------------------------------------------