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

lfs: show a friendly message when pushing lfs to a server without lfs enabled...

lfs: show a friendly message when pushing lfs to a server without lfs enabled Upfront disclaimer: I don't know anything about the wire protocol, and this was pretty much cargo-culted from largefiles, and then clonebundles, since it seems more modern. I was surprised that exchange.push() will ensure all of the proper requirements when exchanging between two local repos, but doesn't care when one is remote. All this new capability marker does is inform the client that the extension is enabled remotely. It may or may not contain commits with external blobs. Open issues: - largefiles uses 'largefiles=serve' for its capability. Someday I hope to be able to push lfs blobs to an `hg serve` instance. That will probably require a distinct capability. Should it change to '=serve' then? Or just add an 'lfs-serve' capability then? - The flip side of this is more complicated. It looks like largefiles adds an 'lheads' command for the client to signal to the server that the extension is loaded. That is then converted to 'heads' and sent through the normal wire protocol plumbing. A client using the 'heads' command directly is kicked out with a message indicating that the largefiles extension must be loaded. We could do similar with 'lfsheads', but then a repo with both largefiles and lfs blobs can't be pushed over the wire. Hopefully somebody with more wire protocol experience can think of something else. I see 'x-hgarg-1' on some commands in the tests, but not on heads, and didn't dig any further.

Martin von Zweigbergk - - Load All Authors

File last commit:

r33790:bbbbd3c3 default


                r35522:fa865878

default

Download file

             dirstateguard.py
        
                    69 lines
            
             | 2.2 KiB
            
                | text/x-python
            
             |
                PythonLexer
            
             / mercurial / dirstateguard.py
          
                    History
                
                 |
                  Annotation
                 | Raw
                 |Copy content
                 |Copy permalink

      # dirstateguard.py - class to allow restoring dirstate after failure

      #

      # Copyright 2005-2007 Matt Mackall <mpm@selenic.com>

      #

      # 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

      from .i18n import _

      from . import (

          error,

          util,

      )

      class dirstateguard(util.transactional):

          '''Restore dirstate at unexpected failure.

          At the construction, this class does:

          - write current ``repo.dirstate`` out, and

          - save ``.hg/dirstate`` into the backup file

          This restores ``.hg/dirstate`` from backup file, if ``release()``

          is invoked before ``close()``.

          This just removes the backup file at ``close()`` before ``release()``.

          '''

          def __init__(self, repo, name):

              self._repo = repo

              self._active = False

              self._closed = False

              self._backupname = 'dirstate.backup.%s.%d' % (name, id(self))

              repo.dirstate.savebackup(repo.currenttransaction(), self._backupname)

              self._active = True

          def __del__(self):

              if self._active: # still active

                  # this may occur, even if this class is used correctly:

                  # for example, releasing other resources like transaction

                  # may raise exception before ``dirstateguard.release`` in

                  # ``release(tr, ....)``.

                  self._abort()

          def close(self):

              if not self._active: # already inactivated

                  msg = (_("can't close already inactivated backup: %s")

                         % self._backupname)

                  raise error.Abort(msg)

              self._repo.dirstate.clearbackup(self._repo.currenttransaction(),

                                               self._backupname)

              self._active = False

              self._closed = True

          def _abort(self):

              self._repo.dirstate.restorebackup(self._repo.currenttransaction(),

                                                 self._backupname)

              self._active = False

          def release(self):

              if not self._closed:

                  if not self._active: # already inactivated

                      msg = (_("can't release already inactivated backup: %s")

                             % self._backupname)

                      raise error.Abort(msg)

                  self._abort()

	Site-wide shortcuts
/	Use quick search box
g h	Goto home page
g g	Goto my private gists page
g G	Goto my public gists page
g 0-9	Goto bookmarked items from 0-9
n r	New repository page
n g	New gist page

	Repositories
g s	Goto summary page
g c	Goto changelog page
g f	Goto files page
g F	Goto files page with file search activated
g p	Goto pull requests page
g o	Goto repository settings
g O	Goto repository access permissions settings
t s	Toggle sidebar on some pages

				# dirstateguard.py - class to allow restoring dirstate after failure
				#
				# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
				#
				# 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

				from .i18n import _

				from . import (
				error,
				util,
				)

				class dirstateguard(util.transactional):
				'''Restore dirstate at unexpected failure.

				At the construction, this class does:

				- write current ``repo.dirstate`` out, and
				- save ``.hg/dirstate`` into the backup file

				This restores ``.hg/dirstate`` from backup file, if ``release()``
				is invoked before ``close()``.

				This just removes the backup file at ``close()`` before ``release()``.
				'''

				def __init__(self, repo, name):
				self._repo = repo
				self._active = False
				self._closed = False
				self._backupname = 'dirstate.backup.%s.%d' % (name, id(self))
				repo.dirstate.savebackup(repo.currenttransaction(), self._backupname)
				self._active = True

				def __del__(self):
				if self._active: # still active
				# this may occur, even if this class is used correctly:
				# for example, releasing other resources like transaction
				# may raise exception before ``dirstateguard.release`` in
				# ``release(tr, ....)``.
				self._abort()

				def close(self):
				if not self._active: # already inactivated
				msg = (_("can't close already inactivated backup: %s")
				% self._backupname)
				raise error.Abort(msg)

				self._repo.dirstate.clearbackup(self._repo.currenttransaction(),
				self._backupname)
				self._active = False
				self._closed = True

				def _abort(self):
				self._repo.dirstate.restorebackup(self._repo.currenttransaction(),
				self._backupname)
				self._active = False

				def release(self):
				if not self._closed:
				if not self._active: # already inactivated
				msg = (_("can't release already inactivated backup: %s")
				% self._backupname)
				raise error.Abort(msg)
				self._abort()