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 from stgit.exception import *
  24 from stgit.run import *
  25
  26 class GitConfigException(StgException):
  27     pass
  28
  29 class GitConfig:
  30     __defaults={
  31         'stgit.autoresolved':   'no',
  32         'stgit.smtpserver':     'localhost:25',
  33         'stgit.smtpdelay':      '5',
  34         'stgit.pullcmd':        'git pull',
  35         'stgit.fetchcmd':       'git fetch',
  36         'stgit.pull-policy':    'pull',
  37         'stgit.autoimerge':     'no',
  38         'stgit.keepoptimized':  'no',
  39         'stgit.extensions':     '.ancestor .current .patched',
  40         'stgit.shortnr':         '5'
  41         }
  42
  43     __cache = None
  44
  45     def load(self):
  46         """Load the whole configuration in __cache unless it has been
  47         done already."""
  48         if self.__cache is not None:
  49             return
  50         self.__cache = {}
  51         lines = Run('git', 'config', '--list', '--null').raw_output()
  52         for line in filter(None, lines.split('\0')):
  53             key, value = line.split('\n', 1)
  54             self.__cache.setdefault(key, []).append(value)
  55
  56     def get(self, name):
  57         self.load()
  58         if name not in self.__cache:
  59             self.__cache[name] = [self.__defaults.get(name, None)]
  60         return self.__cache[name][0]
  61
  62     def getall(self, name):
  63         self.load()
  64         try:
  65             return self.__cache[name]
  66         except KeyError:
  67             return []
  68
  69     def getint(self, name):
  70         value = self.get(name)
  71         if value == None:
  72             return None
  73         elif value.isdigit():
  74             return int(value)
  75         else:
  76             raise GitConfigException, 'Value for "%s" is not an integer: "%s"' % (name, value)
  77
  78     def rename_section(self, from_name, to_name):
  79         """Rename a section in the config file. Silently do nothing if
  80         the section doesn't exist."""
  81         Run('git', 'config', '--rename-section', from_name, to_name
  82             ).returns([0, 1, 128]).run()
  83         self.__cache.clear()
  84
  85     def remove_section(self, name):
  86         """Remove a section in the config file. Silently do nothing if
  87         the section doesn't exist."""
  88         Run('git', 'config', '--remove-section', name
  89             ).returns([0, 1, 128]).discard_stderr().discard_output()
  90         self.__cache.clear()
  91
  92     def set(self, name, value):
  93         Run('git', 'config', name, value).run()
  94         self.__cache[name] = value
  95
  96     def unset(self, name):
  97         Run('git', 'config', '--unset', name)
  98         self.__cache[name] = None
  99
 100     def sections_matching(self, regexp):
 101         """Takes a regexp with a single group, matches it against all
 102         config variables, and returns a list whose members are the
 103         group contents, for all variable names matching the regexp.
 104         """
 105         result = []
 106         for line in Run('git', 'config', '--get-regexp', '"^%s$"' % regexp
 107                         ).returns([0, 1]).output_lines():
 108             m = re.match('^%s ' % regexp, line)
 109             if m:
 110                 result.append(m.group(1))
 111         return result
 112
 113 config=GitConfig()
 114
 115 def config_setup():
 116     global config
 117
 118     # Set the PAGER environment to the config value (if any)
 119     pager = config.get('stgit.pager')
 120     if pager:
 121         os.environ['PAGER'] = pager
 122     # FIXME: handle EDITOR the same way ?
 123
 124 class ConfigOption:
 125     """Delayed cached reading of a configuration option.
 126     """
 127     def __init__(self, section, option):
 128         self.__section = section
 129         self.__option = option
 130         self.__value = None
 131
 132     def __str__(self):
 133         if not self.__value:
 134             self.__value = config.get(self.__section + '.' + self.__option)
 135         return self.__value
 136
 137
 138 # cached extensions
 139 __extensions = None
 140
 141 def file_extensions():
 142     """Returns a dictionary with the conflict file extensions
 143     """
 144     global __extensions
 145
 146     if not __extensions:
 147         cfg_ext = config.get('stgit.extensions').split()
 148         if len(cfg_ext) != 3:
 149             raise CmdException, '"extensions" configuration error'
 150
 151         __extensions = { 'ancestor': cfg_ext[0],
 152                          'current':  cfg_ext[1],
 153                          'patched':  cfg_ext[2] }
 154
 155     return __extensions