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-fetch',
  33         'stgit.pull-does-rebase': 'yes',
  34         'stgit.merger':         'diff3 -L current -L ancestor -L patched -m -E ' \
  35                                 '"%(branch1)s" "%(ancestor)s" "%(branch2)s" > "%(output)s"',
  36         'stgit.autoimerge':     'no',
  37         'stgit.keeporig':       'yes',
  38         'stgit.keepoptimized':  'no',
  39         'stgit.extensions':     '.ancestor .current .patched',
  40         'stgit.shortnr':         '5'
  41         }
  42
  43     __cache={}
  44
  45     def __run(self, cmd, args=None):
  46         """__run: runs cmd using spawnvp.
  47
  48         Runs cmd using spawnvp.  The shell is avoided so it won't mess up
  49         our arguments.  If args is very large, the command is run multiple
  50         times; args is split xargs style: cmd is passed on each
  51         invocation.  Unlike xargs, returns immediately if any non-zero
  52         return code is received.
  53         """
  54
  55         args_l=cmd.split()
  56         if args is None:
  57             args = []
  58         for i in range(0, len(args)+1, 100):
  59             r=os.spawnvp(os.P_WAIT, args_l[0], args_l + args[i:min(i+100, len(args))])
  60         if r:
  61             return r
  62         return 0
  63
  64     def get(self, name):
  65         if self.__cache.has_key(name):
  66             return self.__cache[name]
  67
  68         stream = os.popen('git repo-config --get %s' % name, 'r')
  69         value = stream.readline().strip()
  70         stream.close()
  71         if len(value) > 0:
  72             pass
  73         elif (self.__defaults.has_key(name)):
  74             value = self.__defaults[name]
  75         else:
  76             value = None
  77
  78         self.__cache[name] = value
  79         return value
  80
  81     def getall(self, name):
  82         if self.__cache.has_key(name):
  83             return self.__cache[name]
  84
  85         stream = os.popen('git repo-config --get-all %s' % name, 'r')
  86         values = [line.strip() for line in stream]
  87         stream.close()
  88
  89         self.__cache[name] = values
  90         return values
  91
  92     def getint(self, name):
  93         value = self.get(name)
  94         if value.isdigit():
  95             return int(value)
  96         else:
  97             raise GitConfigException, 'Value for "%s" is not an integer: "%s"' % (name, value)
  98
  99     def set(self, name, value):
 100         self.__run('git-repo-config', [name, value])
 101
 102     def sections_matching(self, regexp):
 103         """Takes a regexp with a single group, matches it against all
 104         config variables, and returns a list whose members are the
 105         group contents, for all variable names matching the regexp.
 106         """
 107         result = []
 108         stream = os.popen('git repo-config --get-regexp "^%s$"' % regexp, 'r')
 109         for line in stream:
 110             m = re.match('^%s ' % regexp, line)
 111             if m:
 112                 result.append(m.group(1))
 113         stream.close()
 114         return result
 115
 116 config=GitConfig()
 117
 118 def config_setup():
 119     global config
 120
 121     # Set the PAGER environment to the config value (if any)
 122     pager = config.get('stgit.pager')
 123     if pager:
 124         os.environ['PAGER'] = pager
 125     # FIXME: handle EDITOR the same way ?
 126
 127 class ConfigOption:
 128     """Delayed cached reading of a configuration option.
 129     """
 130     def __init__(self, section, option):
 131         self.__section = section
 132         self.__option = option
 133         self.__value = None
 134
 135     def __str__(self):
 136         if not self.__value:
 137             self.__value = config.get(self.__section + '.' + self.__option)
 138         return self.__value
 139
 140
 141 # cached extensions
 142 __extensions = None
 143
 144 def file_extensions():
 145     """Returns a dictionary with the conflict file extensions
 146     """
 147     global __extensions
 148
 149     if not __extensions:
 150         cfg_ext = config.get('stgit.extensions').split()
 151         if len(cfg_ext) != 3:
 152             raise CmdException, '"extensions" configuration error'
 153
 154         __extensions = { 'ancestor': cfg_ext[0],
 155                          'current':  cfg_ext[1],
 156                          'patched':  cfg_ext[2] }
 157
 158     return __extensions