/usr/share/pyshared/dulwich/config.py is in python-dulwich 0.8.5-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 | # config.py - Reading and writing Git config files
# Copyright (C) 2011 Jelmer Vernooij <jelmer@samba.org>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; version 2
# of the License or (at your option) a later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.
"""Reading and writing Git configuration files.
TODO:
* preserve formatting when updating configuration files
* treat subsection names as case-insensitive for [branch.foo] style
subsections
"""
import errno
import os
import re
from dulwich.file import GitFile
class Config(object):
"""A Git configuration."""
def get(self, section, name):
"""Retrieve the contents of a configuration setting.
:param section: Tuple with section name and optional subsection namee
:param subsection: Subsection name
:return: Contents of the setting
:raise KeyError: if the value is not set
"""
raise NotImplementedError(self.get)
def get_boolean(self, section, name, default=None):
"""Retrieve a configuration setting as boolean.
:param section: Tuple with section name and optional subsection namee
:param name: Name of the setting, including section and possible
subsection.
:return: Contents of the setting
:raise KeyError: if the value is not set
"""
try:
value = self.get(section, name)
except KeyError:
return default
if value.lower() == "true":
return True
elif value.lower() == "false":
return False
raise ValueError("not a valid boolean string: %r" % value)
def set(self, section, name, value):
"""Set a configuration value.
:param name: Name of the configuration value, including section
and optional subsection
:param: Value of the setting
"""
raise NotImplementedError(self.set)
class ConfigDict(Config):
"""Git configuration stored in a dictionary."""
def __init__(self, values=None):
"""Create a new ConfigDict."""
if values is None:
values = {}
self._values = values
def __repr__(self):
return "%s(%r)" % (self.__class__.__name__, self._values)
def __eq__(self, other):
return (
isinstance(other, self.__class__) and
other._values == self._values)
@classmethod
def _parse_setting(cls, name):
parts = name.split(".")
if len(parts) == 3:
return (parts[0], parts[1], parts[2])
else:
return (parts[0], None, parts[1])
def get(self, section, name):
if isinstance(section, basestring):
section = (section, )
if len(section) > 1:
try:
return self._values[section][name]
except KeyError:
pass
return self._values[(section[0],)][name]
def set(self, section, name, value):
if isinstance(section, basestring):
section = (section, )
self._values.setdefault(section, {})[name] = value
def _format_string(value):
if (value.startswith(" ") or
value.startswith("\t") or
value.endswith(" ") or
value.endswith("\t")):
return '"%s"' % _escape_value(value)
return _escape_value(value)
def _parse_string(value):
value = value.strip()
ret = []
block = []
in_quotes = False
for c in value:
if c == "\"":
in_quotes = (not in_quotes)
ret.append(_unescape_value("".join(block)))
block = []
elif c in ("#", ";") and not in_quotes:
# the rest of the line is a comment
break
else:
block.append(c)
if in_quotes:
raise ValueError("value starts with quote but lacks end quote")
ret.append(_unescape_value("".join(block)).rstrip())
return "".join(ret)
def _unescape_value(value):
"""Unescape a value."""
def unescape(c):
return {
"\\\\": "\\",
"\\\"": "\"",
"\\n": "\n",
"\\t": "\t",
"\\b": "\b",
}[c.group(0)]
return re.sub(r"(\\.)", unescape, value)
def _escape_value(value):
"""Escape a value."""
return value.replace("\\", "\\\\").replace("\n", "\\n").replace("\t", "\\t").replace("\"", "\\\"")
def _check_variable_name(name):
for c in name:
if not c.isalnum() and c != '-':
return False
return True
def _check_section_name(name):
for c in name:
if not c.isalnum() and c not in ('-', '.'):
return False
return True
def _strip_comments(line):
line = line.split("#")[0]
line = line.split(";")[0]
return line
class ConfigFile(ConfigDict):
"""A Git configuration file, like .git/config or ~/.gitconfig.
"""
@classmethod
def from_file(cls, f):
"""Read configuration from a file-like object."""
ret = cls()
section = None
setting = None
for lineno, line in enumerate(f.readlines()):
line = line.lstrip()
if setting is None:
if len(line) > 0 and line[0] == "[":
line = _strip_comments(line).rstrip()
last = line.index("]")
if last == -1:
raise ValueError("expected trailing ]")
pts = line[1:last].split(" ", 1)
line = line[last+1:]
pts[0] = pts[0].lower()
if len(pts) == 2:
if pts[1][0] != "\"" or pts[1][-1] != "\"":
raise ValueError(
"Invalid subsection " + pts[1])
else:
pts[1] = pts[1][1:-1]
if not _check_section_name(pts[0]):
raise ValueError("invalid section name %s" %
pts[0])
section = (pts[0], pts[1])
else:
if not _check_section_name(pts[0]):
raise ValueError("invalid section name %s" %
pts[0])
pts = pts[0].split(".", 1)
if len(pts) == 2:
section = (pts[0], pts[1])
else:
section = (pts[0], )
ret._values[section] = {}
if _strip_comments(line).strip() == "":
continue
if section is None:
raise ValueError("setting %r without section" % line)
try:
setting, value = line.split("=", 1)
except ValueError:
setting = line
value = "true"
setting = setting.strip().lower()
if not _check_variable_name(setting):
raise ValueError("invalid variable name %s" % setting)
if value.endswith("\\\n"):
value = value[:-2]
continuation = True
else:
continuation = False
value = _parse_string(value)
ret._values[section][setting] = value
if not continuation:
setting = None
else: # continuation line
if line.endswith("\\\n"):
line = line[:-2]
continuation = True
else:
continuation = False
value = _parse_string(line)
ret._values[section][setting] += value
if not continuation:
setting = None
return ret
@classmethod
def from_path(cls, path):
"""Read configuration from a file on disk."""
f = GitFile(path, 'rb')
try:
ret = cls.from_file(f)
ret.path = path
return ret
finally:
f.close()
def write_to_path(self, path=None):
"""Write configuration to a file on disk."""
if path is None:
path = self.path
f = GitFile(path, 'wb')
try:
self.write_to_file(f)
finally:
f.close()
def write_to_file(self, f):
"""Write configuration to a file-like object."""
for section, values in self._values.iteritems():
try:
section_name, subsection_name = section
except ValueError:
(section_name, ) = section
subsection_name = None
if subsection_name is None:
f.write("[%s]\n" % section_name)
else:
f.write("[%s \"%s\"]\n" % (section_name, subsection_name))
for key, value in values.iteritems():
f.write("%s = %s\n" % (key, _escape_value(value)))
class StackedConfig(Config):
"""Configuration which reads from multiple config files.."""
def __init__(self, backends, writable=None):
self.backends = backends
self.writable = writable
def __repr__(self):
return "<%s for %r>" % (self.__class__.__name__, self.backends)
@classmethod
def default_backends(cls):
"""Retrieve the default configuration.
This will look in the repository configuration (if for_path is
specified), the users' home directory and the system
configuration.
"""
paths = []
paths.append(os.path.expanduser("~/.gitconfig"))
paths.append("/etc/gitconfig")
backends = []
for path in paths:
try:
cf = ConfigFile.from_path(path)
except (IOError, OSError), e:
if e.errno != errno.ENOENT:
raise
else:
continue
backends.append(cf)
return backends
def get(self, section, name):
for backend in self.backends:
try:
return backend.get(section, name)
except KeyError:
pass
raise KeyError(name)
def set(self, section, name, value):
if self.writable is None:
raise NotImplementedError(self.set)
return self.writable.set(section, name, value)
|