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     __cache={}
  43
  44     def __run(self, cmd, args=None):
  45         """__run: runs cmd using spawnvp.
  46
  47         Runs cmd using spawnvp.  The shell is avoided so it won't mess up
  48         our arguments.  If args is very large, the command is run multiple
  49         times; args is split xargs style: cmd is passed on each
  50         invocation.  Unlike xargs, returns immediately if any non-zero
  51         return code is received.
  52         """
  53
  54         args_l=cmd.split()
  55         if args is None:
  56             args = []
  57         for i in range(0, len(args)+1, 100):
  58             r=os.spawnvp(os.P_WAIT, args_l[0], args_l + args[i:min(i+100, len(args))])
  59         if r:
  60             return r
  61         return 0
  62
  63     def get(self, name):
  64         if self.__cache.has_key(name):
  65             return self.__cache[name]
  66
  67         stream = os.popen('git repo-config --get %s' % name, 'r')
  68         value = stream.readline().strip()
  69         stream.close()
  70         if len(value) > 0:
  71             pass
  72         elif (self.__defaults.has_key(name)):
  73             value = self.__defaults[name]
  74         else:
  75             value = None
  76
  77         self.__cache[name] = value
  78         return value
  79
  80     def getall(self, name):
  81         if self.__cache.has_key(name):
  82             return self.__cache[name]
  83
  84         stream = os.popen('git repo-config --get-all %s' % name, 'r')
  85         values = [line.strip() for line in stream]
  86         stream.close()
  87
  88         self.__cache[name] = values
  89         return values
  90
  91     def getint(self, name):
  92         value = self.get(name)
  93         if value.isdigit():
  94             return int(value)
  95         else:
  96             raise GitConfigException, 'Value for "%s" is not an integer: "%s"' % (name, value)
  97
  98     def set(self, name, value):
  99         self.__run('git-repo-config', [name, value])
 100
 101     def sections_matching(self, regexp):
 102         """Takes a regexp with a single group, matches it against all
 103         config variables, and returns a list whose members are the
 104         group contents, for all variable names matching the regexp.
 105         """
 106         result = []
 107         stream = os.popen('git repo-config --get-regexp "^%s$"' % regexp, 'r')
 108         for line in stream:
 109             m = re.match('^%s ' % regexp, line)
 110             if m:
 111                 result.append(m.group(1))
 112         stream.close()
 113         return result
 114
 115 config=GitConfig()
 116
 117 def config_setup():
 118     global config
 119
 120     # Set the PAGER environment to the config value (if any)
 121     pager = config.get('stgit.pager')
 122     if pager:
 123         os.environ['PAGER'] = pager
 124     # FIXME: handle EDITOR the same way ?
 125
 126 class ConfigOption:
 127     """Delayed cached reading of a configuration option.
 128     """
 129     def __init__(self, section, option):
 130         self.__section = section
 131         self.__option = option
 132         self.__value = None
 133
 134     def __str__(self):
 135         if not self.__value:
 136             self.__value = config.get(self.__section + '.' + self.__option)
 137         return self.__value
 138
 139
 140 # cached extensions
 141 __extensions = None
 142
 143 def file_extensions():
 144     """Returns a dictionary with the conflict file extensions
 145     """
 146     global __extensions
 147
 148     if not __extensions:
 149         cfg_ext = config.get('stgit.extensions').split()
 150         if len(cfg_ext) != 3:
 151             raise CmdException, '"extensions" configuration error'
 152
 153         __extensions = { 'ancestor': cfg_ext[0],
 154                          'current':  cfg_ext[1],
 155                          'patched':  cfg_ext[2] }
 156
 157     return __extensions