Mercurial > hg
view mercurial/config.py @ 50065:927da152800c
dirstate-guard: remove its usage in `backout`
We can simply replace it with a transaction.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Tue, 14 Feb 2023 00:40:27 +0100 |
parents | 642e31cb55f0 |
children | 18c8c18993f0 |
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# config.py - configuration parsing for Mercurial # # Copyright 2009 Olivia Mackall <olivia@selenic.com> and others # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. import errno import os from .i18n import _ from .pycompat import getattr from . import ( encoding, error, util, ) class config: def __init__(self, data=None): self._current_source_level = 0 self._data = {} self._unset = [] if data: for k in data._data: self._data[k] = data[k].copy() self._current_source_level = data._current_source_level + 1 def new_source(self): """increment the source counter This is used to define source priority when reading""" self._current_source_level += 1 def copy(self): return config(self) def __contains__(self, section): return section in self._data def hasitem(self, section, item): return item in self._data.get(section, {}) def __getitem__(self, section): return self._data.get(section, {}) def __iter__(self): for d in self.sections(): yield d def update(self, src): current_level = self._current_source_level current_level += 1 max_level = self._current_source_level for s, n in src._unset: ds = self._data.get(s, None) if ds is not None and n in ds: self._data[s] = ds.preparewrite() del self._data[s][n] for s in src: ds = self._data.get(s, None) if ds: self._data[s] = ds.preparewrite() else: self._data[s] = util.cowsortdict() for k, v in src._data[s].items(): value, source, level = v level += current_level max_level = max(level, current_level) self._data[s][k] = (value, source, level) self._current_source_level = max_level def _get(self, section, item): return self._data.get(section, {}).get(item) def get(self, section, item, default=None): result = self._get(section, item) if result is None: return default return result[0] def backup(self, section, key): """return a tuple allowing restore to reinstall a previous value The main reason we need it is because it handles the "no data" case. """ try: item = self._data[section][key] except KeyError: return (section, key) else: return (section, key) + item def source(self, section, item): result = self._get(section, item) if result is None: return b"" return result[1] def level(self, section, item): result = self._get(section, item) if result is None: return None return result[2] def sections(self): return sorted(self._data.keys()) def items(self, section): items = self._data.get(section, {}).items() return [(k, v[0]) for (k, v) in items] def set(self, section, item, value, source=b""): assert not isinstance( section, str ), b'config section may not be unicode strings on Python 3' assert not isinstance( item, str ), b'config item may not be unicode strings on Python 3' assert not isinstance( value, str ), b'config values may not be unicode strings on Python 3' if section not in self: self._data[section] = util.cowsortdict() else: self._data[section] = self._data[section].preparewrite() self._data[section][item] = (value, source, self._current_source_level) def alter(self, section, key, new_value): """alter a value without altering its source or level This method is meant to be used by `ui.fixconfig` only.""" item = self._data[section][key] size = len(item) new_item = (new_value,) + item[1:] assert len(new_item) == size self._data[section][key] = new_item def restore(self, data): """restore data returned by self.backup""" if len(data) != 2: # restore old data section, key = data[:2] item = data[2:] self._data[section] = self._data[section].preparewrite() self._data[section][key] = item else: # no data before, remove everything section, item = data if section in self._data: self._data[section].pop(item, None) def parse(self, src, data, sections=None, remap=None, include=None): sectionre = util.re.compile(br'\[([^\[]+)\]') itemre = util.re.compile(br'([^=\s][^=]*?)\s*=\s*(.*\S|)') contre = util.re.compile(br'\s+(\S|\S.*\S)\s*$') emptyre = util.re.compile(br'(;|#|\s*$)') commentre = util.re.compile(br'(;|#)') unsetre = util.re.compile(br'%unset\s+(\S+)') includere = util.re.compile(br'%include\s+(\S|\S.*\S)\s*$') section = b"" item = None line = 0 cont = False if remap: section = remap.get(section, section) for l in data.splitlines(True): line += 1 if line == 1 and l.startswith(b'\xef\xbb\xbf'): # Someone set us up the BOM l = l[3:] if cont: if commentre.match(l): continue m = contre.match(l) if m: if sections and section not in sections: continue v = self.get(section, item) + b"\n" + m.group(1) self.set(section, item, v, b"%s:%d" % (src, line)) continue item = None cont = False m = includere.match(l) if m and include: expanded = util.expandpath(m.group(1)) try: include(expanded, remap=remap, sections=sections) except IOError as inst: if inst.errno != errno.ENOENT: raise error.ConfigError( _(b"cannot include %s (%s)") % (expanded, encoding.strtolocal(inst.strerror)), b"%s:%d" % (src, line), ) continue if emptyre.match(l): continue m = sectionre.match(l) if m: section = m.group(1) if remap: section = remap.get(section, section) if section not in self: self._data[section] = util.cowsortdict() continue m = itemre.match(l) if m: item = m.group(1) cont = True if sections and section not in sections: continue self.set(section, item, m.group(2), b"%s:%d" % (src, line)) continue m = unsetre.match(l) if m: name = m.group(1) if sections and section not in sections: continue if self.get(section, name) is not None: self._data[section] = self._data[section].preparewrite() del self._data[section][name] self._unset.append((section, name)) continue message = l.rstrip() if l.startswith(b' '): message = b"unexpected leading whitespace: %s" % message raise error.ConfigError(message, (b"%s:%d" % (src, line))) def read(self, path, fp=None, sections=None, remap=None): self.new_source() if not fp: fp = util.posixfile(path, b'rb') assert ( getattr(fp, 'mode', 'rb') == 'rb' ), b'config files must be opened in binary mode, got fp=%r mode=%r' % ( fp, fp.mode, ) dir = os.path.dirname(path) def include(rel, remap, sections): abs = os.path.normpath(os.path.join(dir, rel)) self.read(abs, remap=remap, sections=sections) # anything after the include has a higher level self.new_source() self.parse( path, fp.read(), sections=sections, remap=remap, include=include )