Mercurial > hgrepos > Python > libs > ConfigMix

comparison configmix/config.py @ 395:0b3ffc34fa5c

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Begin a jailed configuration with access to a sub-tree of the original configuration
author Franz Glasner <f.glasner@feldmann-mg.com>
date Thu, 18 Nov 2021 18:30:59 +0100
parents 44ef854da70a
children a50f8fb16b05
comparison
equal deleted inserted replaced
394:e05195ee869d 395:0b3ffc34fa5c
116 116
117 No variable interpolation is done and no filters are applied. 117 No variable interpolation is done and no filters are applied.
118 118
119 Quoting of anything in `paths` is *not* needed and wrong. 119 Quoting of anything in `paths` is *not* needed and wrong.
120 120
121 """ 121 """
122 default = kwds.pop("default", _MARKER) 122 default = kwds.pop("default", _MARKER)
123 for path in paths: 123 for path in paths:
124 if isinstance(path, (list, tuple)): 124 if isinstance(path, (list, tuple)):
125 try: 125 try:
126 varvalue = self.getvarl(*path) 126 varvalue = self.getvarl(*path)
646 res.append(uchr(int(p[1:9], 16))) 646 res.append(uchr(int(p[1:9], 16)))
647 res.append(p[9:]) 647 res.append(p[9:])
648 else: 648 else:
649 raise ValueError("unknown quote syntax string: {}".format(s)) 649 raise ValueError("unknown quote syntax string: {}".format(s))
650 return ''.join(res) 650 return ''.join(res)
651
652 def jailed(self, rootpath=None, root=None):
653 """Return a "jailed" configuration.
654
655 """
656 if rootpath is not None and root is not None:
657 raise ValueError("only one of `rootpath' or `root' can be given")
658 if rootpath is None and root is None:
659 raise ValueError("one of `rootpath' or `root' must be given")
660 if root is not None:
661 # convert to path
662 varns, varname = self._split_ns(root)
663 if varns:
664 raise ValueError(
665 "jailed configurations do not support namespaces")
666 rootpath = [
667 self.unquote(p) for p in root.split(
668 self._HIER_SEPARATOR)
669 ]
670
671 return _JailedConfiguration(self, *rootpath)
672
673
674 class _JailedConfiguration(object):
675
676 """Chrooted into a subtree of the configuration -- no namespace support"""
677
678 __slots__ = ("_base", "_path", "_pathstr" )
679
680 def __init__(self, config, *path):
681 super(_JailedConfiguration, self).__init__()
682 self._base = config
683 self._path = path
684 if path:
685 self._pathstr = \
686 Configuration._HIER_SEPARATOR.join(
687 [Configuration.quote(p) for p in path]) \
688 + Configuration._HIER_SEPARATOR
689 else:
690 self._pathstr = ''
691 #
692 # Early error out if the chroot does not exist but allow
693 # degenerated case if `self._path` is empty.
694 #
695 if self._path:
696 self._base.getvarl(*self._path)
697
698 def getvarl(self, *path, **kwds):
699 return self._base.getvarl(*(self._path + path), **kwds)
700
701 def getvarl_s(self, *path, **kwds):
702 return self._base.getvarl_s(*(self._path + path), **kwds)
703
704 def getvar(self, varname, default=_MARKER):
705 return self._base.getvar(self._pathstr + varname, default=default)
706
707 def getvar_s(self, varname, default=_MARKER):
708 return self._base.getvar_s(self._pathstr + varname, default=default)