upstream/mercurial-mirror Files · mercurial/revlogutils/constants.py

changegroup: allow to force delta to be against p1...

changegroup: allow to force delta to be against p1 This new developer option is useful to general more "generic" bundle. Without this option, a bundle generated from the repository use deltas similar to the one stored in the specific repository it was generated from. This makes performance testing a bit tricky. Using deltas similar to the final result means all delta stored in the bundle can be applied to the target repository without any further processing (except for the rare case of a full snapshot). The application of such bundles (almost) never exercises the (slower) path of searching for a new valid delta. This result in unrealistic and too favorable timing and profile. Instead, we introduce an option to make sure all revisions are stored as a delta against p1. It might not be the best generation option, but it guarantees that the content will be "generic", not favoring a specific target.

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        Boris Feld
    
revlog: split constants into a new `revlogutils.constants` module...

              r39365
            
      # revlogdeltas.py - constant used for revlog logic

      #

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

      # Copyright 2018 Octobus <contact@octobus.net>

      #

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

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

      """Helper class to compute deltas stored inside revlogs"""

      from __future__ import absolute_import

      from .. import (

        Gregory Szorc
    
repository: define and use revision flag constants...

              r40083
            
          repository,

        Boris Feld
    
revlog: split constants into a new `revlogutils.constants` module...

              r39365
            
          util,

      )

      # revlog header flags

      REVLOGV0 = 0

      REVLOGV1 = 1

      # Dummy value until file format is finalized.

      # Reminder: change the bounds check in revlog.__init__ when this is changed.

      REVLOGV2 = 0xDEAD

      FLAG_INLINE_DATA = (1 << 16)

      FLAG_GENERALDELTA = (1 << 17)

      REVLOG_DEFAULT_FLAGS = FLAG_INLINE_DATA

      REVLOG_DEFAULT_FORMAT = REVLOGV1

      REVLOG_DEFAULT_VERSION = REVLOG_DEFAULT_FORMAT | REVLOG_DEFAULT_FLAGS

      REVLOGV1_FLAGS = FLAG_INLINE_DATA | FLAG_GENERALDELTA

      REVLOGV2_FLAGS = REVLOGV1_FLAGS

      # revlog index flags

        Gregory Szorc
    
repository: define and use revision flag constants...

              r40083
            
      # For historical reasons, revlog's internal flags were exposed via the

      # wire protocol and are even exposed in parts of the storage APIs.

      # revision has censor metadata, must be verified

      REVIDX_ISCENSORED = repository.REVISION_FLAG_CENSORED

      # revision hash does not match data (narrowhg)

      REVIDX_ELLIPSIS = repository.REVISION_FLAG_ELLIPSIS

      # revision data is stored externally

      REVIDX_EXTSTORED = repository.REVISION_FLAG_EXTSTORED

        Boris Feld
    
revlog: split constants into a new `revlogutils.constants` module...

              r39365
            
      REVIDX_DEFAULT_FLAGS = 0

      # stable order in which flags need to be processed and their processors applied

      REVIDX_FLAGS_ORDER = [

          REVIDX_ISCENSORED,

          REVIDX_ELLIPSIS,

          REVIDX_EXTSTORED,

      ]

      REVIDX_KNOWN_FLAGS = util.bitsfrom(REVIDX_FLAGS_ORDER)

      # bitmark for flags that could cause rawdata content change

      REVIDX_RAWTEXT_CHANGING_FLAGS = REVIDX_ISCENSORED | REVIDX_EXTSTORED

        Boris Feld
    
sparse-revlog: set max delta chain length to on thousand...

              r39542
            
      SPARSE_REVLOG_MAX_CHAIN_LENGTH = 1000

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Boris Feld revlog: split constants into a new `revlogutils.constants` module...	r39365	# revlogdeltas.py - constant used for revlog logic
		#
		# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
		# Copyright 2018 Octobus <contact@octobus.net>
		#
		# This software may be used and distributed according to the terms of the
		# GNU General Public License version 2 or any later version.
		"""Helper class to compute deltas stored inside revlogs"""

		from __future__ import absolute_import

		from .. import (
Gregory Szorc repository: define and use revision flag constants...	r40083	repository,
Boris Feld revlog: split constants into a new `revlogutils.constants` module...	r39365	util,
		)

		# revlog header flags
		REVLOGV0 = 0
		REVLOGV1 = 1
		# Dummy value until file format is finalized.
		# Reminder: change the bounds check in revlog.__init__ when this is changed.
		REVLOGV2 = 0xDEAD
		FLAG_INLINE_DATA = (1 << 16)
		FLAG_GENERALDELTA = (1 << 17)
		REVLOG_DEFAULT_FLAGS = FLAG_INLINE_DATA
		REVLOG_DEFAULT_FORMAT = REVLOGV1
		REVLOG_DEFAULT_VERSION = REVLOG_DEFAULT_FORMAT \| REVLOG_DEFAULT_FLAGS
		REVLOGV1_FLAGS = FLAG_INLINE_DATA \| FLAG_GENERALDELTA
		REVLOGV2_FLAGS = REVLOGV1_FLAGS

		# revlog index flags
Gregory Szorc repository: define and use revision flag constants...	r40083
		# For historical reasons, revlog's internal flags were exposed via the
		# wire protocol and are even exposed in parts of the storage APIs.

		# revision has censor metadata, must be verified
		REVIDX_ISCENSORED = repository.REVISION_FLAG_CENSORED
		# revision hash does not match data (narrowhg)
		REVIDX_ELLIPSIS = repository.REVISION_FLAG_ELLIPSIS
		# revision data is stored externally
		REVIDX_EXTSTORED = repository.REVISION_FLAG_EXTSTORED
Boris Feld revlog: split constants into a new `revlogutils.constants` module...	r39365	REVIDX_DEFAULT_FLAGS = 0
		# stable order in which flags need to be processed and their processors applied
		REVIDX_FLAGS_ORDER = [
		REVIDX_ISCENSORED,
		REVIDX_ELLIPSIS,
		REVIDX_EXTSTORED,
		]
		REVIDX_KNOWN_FLAGS = util.bitsfrom(REVIDX_FLAGS_ORDER)
		# bitmark for flags that could cause rawdata content change
		REVIDX_RAWTEXT_CHANGING_FLAGS = REVIDX_ISCENSORED \| REVIDX_EXTSTORED
Boris Feld sparse-revlog: set max delta chain length to on thousand...	r39542
		SPARSE_REVLOG_MAX_CHAIN_LENGTH = 1000