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Preserve the order of configuration files.

Changeset 6d2a7d3c10dc …

Parent 2a8548be3b1f …

by Benjamin Pollack Jan 10 13 at 5:30 PM

Changes to one file · Browse files at 6d2a7d3c10dc Showing diff from parent 2a8548be3b1f Diff from another changeset...

Change 1 of 7 Show Changes Only Show Entire File Loading... dulwich/config.py Stacked
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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 collections import OrderedDict` `from UserDict import DictMixin` `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, DictMixin):` `"""Git configuration stored in a dictionary."""` `def __init__(self, values=None):` `"""Create a new ConfigDict."""` `if values is None:`-`values = {}`+`values = OrderedDict()` `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)` `def __getitem__(self, key):` `return self._values[key]`-+ `def __setitem__(self, key, value):` `self._values[key] = value`-+ `def keys(self):` `return self._values.keys()` `@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`+`self._values.setdefault(section, OrderedDict())[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] = {}`+`ret._values[section] = OrderedDict()` `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)`