mdw@git.distorted.org.uk Git - stgit/blob - stgit/config.py

   1 """Handles the Stacked GIT configuration files
   2 """
   3
   4 __copyright__ = """
   5 Copyright (C) 2005, 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, re
  22 from stgit import basedir
  23
  24 class GitConfigException(Exception):
  25     pass
  26
  27 class GitConfig:
  28     __defaults={
  29         'stgit.autoresolved':   'no',
  30         'stgit.smtpserver':     'localhost:25',
  31         'stgit.smtpdelay':      '5',
  32         'stgit.pullcmd':        'git-pull',
  33         'stgit.merger':         'diff3 -L current -L ancestor -L patched -m -E ' \
  34                                 '"%(branch1)s" "%(ancestor)s" "%(branch2)s" > "%(output)s"',
  35         'stgit.autoimerge':     'no',
  36         'stgit.keeporig':       'yes',
  37         'stgit.keepoptimized':  'no',
  38         'stgit.extensions':     '.ancestor .current .patched',
  39         'stgit.shortnr':         '5'
  40         }
  41
  42     def __run(self, cmd, args=None):
  43         """__run: runs cmd using spawnvp.
  44
  45         Runs cmd using spawnvp.  The shell is avoided so it won't mess up
  46         our arguments.  If args is very large, the command is run multiple
  47         times; args is split xargs style: cmd is passed on each
  48         invocation.  Unlike xargs, returns immediately if any non-zero
  49         return code is received.
  50         """
  51
  52         args_l=cmd.split()
  53         if args is None:
  54             args = []
  55         for i in range(0, len(args)+1, 100):
  56             r=os.spawnvp(os.P_WAIT, args_l[0], args_l + args[i:min(i+100, len(args))])
  57         if r:
  58             return r
  59         return 0
  60
  61     def get(self, name):
  62         stream = os.popen('git repo-config --get %s' % name, 'r')
  63         value = stream.readline().strip()
  64         stream.close()
  65         if len(value) > 0:
  66             return value
  67         elif (self.__defaults.has_key(name)):
  68             return self.__defaults[name]
  69         else:
  70             return None
  71
  72     def getall(self, name):
  73         stream = os.popen('git repo-config --get-all %s' % name, 'r')
  74         values = [line.strip() for line in stream]
  75         stream.close()
  76         return values
  77
  78     def getint(self, name):
  79         value = self.get(name)
  80         if value.isdigit():
  81             return int(value)
  82         else:
  83             raise GitConfigException, 'Value for "%s" is not an integer: "%s"' % (name, value)
  84
  85     def set(self, name, value):
  86         self.__run('git-repo-config', [name, value])
  87
  88     def sections_matching(self, regexp):
  89         """Takes a regexp with a single group, matches it against all
  90         config variables, and returns a list whose members are the
  91         group contents, for all variable names matching the regexp.
  92         """
  93         result = []
  94         stream = os.popen('git repo-config --get-regexp "^%s$"' % regexp, 'r')
  95         for line in stream:
  96             m = re.match('^%s ' % regexp, line)
  97             if m:
  98                 result.append(m.group(1))
  99         stream.close()
 100         return result
 101
 102 config=GitConfig()
 103
 104 def config_setup():
 105     global config
 106
 107     # Set the PAGER environment to the config value (if any)
 108     pager = config.get('stgit.pager')
 109     if pager:
 110         os.environ['PAGER'] = pager
 111     # FIXME: handle EDITOR the same way ?
 112
 113 class ConfigOption:
 114     """Delayed cached reading of a configuration option.
 115     """
 116     def __init__(self, section, option):
 117         self.__section = section
 118         self.__option = option
 119         self.__value = None
 120
 121     def __str__(self):
 122         if not self.__value:
 123             self.__value = config.get(self.__section + '.' + self.__option)
 124         return self.__value
 125
 126
 127 # cached extensions
 128 __extensions = None
 129
 130 def file_extensions():
 131     """Returns a dictionary with the conflict file extensions
 132     """
 133     global __extensions
 134
 135     if not __extensions:
 136         cfg_ext = config.get('stgit.extensions').split()
 137         if len(cfg_ext) != 3:
 138             raise CmdException, '"extensions" configuration error'
 139
 140         __extensions = { 'ancestor': cfg_ext[0],
 141                          'current':  cfg_ext[1],
 142                          'patched':  cfg_ext[2] }
 143
 144     return __extensions