upstream/mercurial-mirror Files · mercurial/txnutil.py

abort: added logic for of hg abort...

abort: added logic for of hg abort This is part of `GSoC19` project `Implement abort and continue commands`. This patch is part of the `abort plan`. This adds the basic logic for `hg abort`. This command aborts an multistep operation like graft, histedit, rebase, merge and unshelve if they are in an unfinished state. The first part of the logic is determining the unfinished operation from the state detection API under `statemod`. This API is extended to support `hg abort` by adding a method to register the abort logic as a function (here `abortfunc`). Once the unfinished operation is determined the registered logic is used to abort the command. The benefit of this kind of framework is that any new extension developed can support `hg abort` by registering the command and logic under statedetection API. `hg abort` currently supports `--dry-run/-n` flag only. It is used to dry run `hg abort` Further patches sequentially add support for `graft`, `rebase`, `unshelve`, `histedit` and `merge`. Differential Revision: https://phab.mercurial-scm.org/D6566

FUJIWARA Katsunori - - Load All Authors

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      # txnutil.py - transaction related utilities

      #

      #  Copyright FUJIWARA Katsunori <foozy@lares.dti.ne.jp> 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.

      from __future__ import absolute_import

      import errno

      from . import (

          encoding,

      )

      def mayhavepending(root):

          '''return whether 'root' may have pending changes, which are

          visible to this process.

          '''

          return root == encoding.environ.get('HG_PENDING')

      def trypending(root, vfs, filename, **kwargs):

          '''Open  file to be read according to HG_PENDING environment variable

          This opens '.pending' of specified 'filename' only when HG_PENDING

          is equal to 'root'.

          This returns '(fp, is_pending_opened)' tuple.

          '''

          if mayhavepending(root):

              try:

                  return (vfs('%s.pending' % filename, **kwargs), True)

              except IOError as inst:

                  if inst.errno != errno.ENOENT:

                      raise

          return (vfs(filename, **kwargs), False)

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				# txnutil.py - transaction related utilities
				#
				# Copyright FUJIWARA Katsunori <foozy@lares.dti.ne.jp> 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.

				from __future__ import absolute_import

				import errno

				from . import (
				encoding,
				)

				def mayhavepending(root):
				'''return whether 'root' may have pending changes, which are
				visible to this process.
				'''
				return root == encoding.environ.get('HG_PENDING')

				def trypending(root, vfs, filename, **kwargs):
				'''Open file to be read according to HG_PENDING environment variable

				This opens '.pending' of specified 'filename' only when HG_PENDING
				is equal to 'root'.

				This returns '(fp, is_pending_opened)' tuple.
				'''
				if mayhavepending(root):
				try:
				return (vfs('%s.pending' % filename, **kwargs), True)
				except IOError as inst:
				if inst.errno != errno.ENOENT:
				raise
				return (vfs(filename, **kwargs), False)