upstream/mercurial-mirror Files · mercurial/interfaces/util.py

chg: make is possible to call by default an hg binary located next to chg...

chg: make is possible to call by default an hg binary located next to chg When a single version of hg is in use and it's in the PATH, using chg is just a matter of calling chg. But when there are multiple installations of hg+chg around, and hg is referred to with an absolute path, using chg is more annoying because it requires both changing the invocation to hg to use chg, but also setting CHGHG. Currently, we set HGPATH when we build chg to remove the need to set CHGHG in the previous paragraph. But that means chg now hardcodes its installation path, which makes the installation not relocatable. Hence this proposal to make chg find ./hg relative to itself (as opposed to CHGHG=./hg which find hg relative to cwd). This only works on linux as written, but since it's opt-in, it sounds fine. Tested by hand, as I'm not sure how else to test this. Differential Revision: https://phab.mercurial-scm.org/D9006

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      # util.py - Utilities for declaring interfaces.

      #

      # Copyright 2018 Gregory Szorc <gregory.szorc@gmail.com>

      #

      # This software may be used and distributed according to the terms of the

      # GNU General Public License version 2 or any later version.

      # zope.interface imposes a run-time cost due to module import overhead and

      # bookkeeping for declaring interfaces. So, we use stubs for various

      # zope.interface primitives unless instructed otherwise.

      from __future__ import absolute_import

      from .. import encoding

      if encoding.environ.get(b'HGREALINTERFACES'):

          from ..thirdparty.zope import interface as zi

          Attribute = zi.Attribute

          Interface = zi.Interface

          implementer = zi.implementer

      else:

          class Attribute(object):

              def __init__(self, __name__, __doc__=b''):

                  pass

          class Interface(object):

              def __init__(

                  self, name, bases=(), attrs=None, __doc__=None, __module__=None

              ):

                  pass

          def implementer(*ifaces):

              def wrapper(cls):

                  return cls

              return wrapper

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				# util.py - Utilities for declaring interfaces.
				#
				# Copyright 2018 Gregory Szorc <gregory.szorc@gmail.com>
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2 or any later version.

				# zope.interface imposes a run-time cost due to module import overhead and
				# bookkeeping for declaring interfaces. So, we use stubs for various
				# zope.interface primitives unless instructed otherwise.

				from __future__ import absolute_import

				from .. import encoding

				if encoding.environ.get(b'HGREALINTERFACES'):
				from ..thirdparty.zope import interface as zi

				Attribute = zi.Attribute
				Interface = zi.Interface
				implementer = zi.implementer
				else:

				class Attribute(object):
				def __init__(self, __name__, __doc__=b''):
				pass

				class Interface(object):
				def __init__(
				self, name, bases=(), attrs=None, __doc__=None, __module__=None
				):
				pass

				def implementer(*ifaces):
				def wrapper(cls):
				return cls

				return wrapper