stgit/basedir.py

   1 """Access to the GIT base directory
   2 """
   3
   4 __copyright__ = """
   5 Copyright (C) 2006, Catalin Marinas <catalin.marinas@gmail.com>
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License version 2 as
   9 published by the Free Software Foundation.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19 """
  20
  21 import os
  22
  23 def __output(cmd):
  24     f = os.popen(cmd, 'r')
  25     string = f.readline().rstrip()
  26     if f.close():
  27         return ''
  28     return string
  29
  30 # GIT_DIR value cached
  31 __base_dir = None
  32
  33 def get():
  34     """Return the .git directory location
  35     """
  36     global __base_dir
  37
  38     if not __base_dir:
  39         if 'GIT_DIR' in os.environ:
  40             __base_dir = os.environ['GIT_DIR']
  41         else:
  42             __base_dir = __output('git-rev-parse --git-dir 2> /dev/null')
  43
  44     return __base_dir
  45
  46 def clear_cache():
  47     """Clear the cached location of .git
  48     """
  49     global __base_dir
  50     __base_dir = None