| author | Yuya Nishihara <yuya@tcha.org> |
| Fri, 18 Dec 2020 20:35:11 +0900 | |
| changeset 46172 | d04c0e494cfe |
| parent 45671 | 2d6aea053153 |
| child 46704 | 913485776542 |
| permissions | -rw-r--r-- |
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# revlogdeltas.py - constant used for revlog logic |
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# |
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# Copyright 2005-2007 Matt Mackall <mpm@selenic.com> |
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# Copyright 2018 Octobus <contact@octobus.net> |
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# |
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# This software may be used and distributed according to the terms of the |
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# GNU General Public License version 2 or any later version. |
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"""Helper class to compute deltas stored inside revlogs""" |
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from __future__ import absolute_import |
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from ..interfaces import repository |
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# revlog header flags |
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REVLOGV0 = 0 |
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REVLOGV1 = 1 |
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# Dummy value until file format is finalized. |
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# Reminder: change the bounds check in revlog.__init__ when this is changed. |
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REVLOGV2 = 0xDEAD |
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# Shared across v1 and v2. |
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FLAG_INLINE_DATA = 1 << 16 |
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# Only used by v1, implied by v2. |
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FLAG_GENERALDELTA = 1 << 17 |
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REVLOG_DEFAULT_FLAGS = FLAG_INLINE_DATA |
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REVLOG_DEFAULT_FORMAT = REVLOGV1 |
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REVLOG_DEFAULT_VERSION = REVLOG_DEFAULT_FORMAT | REVLOG_DEFAULT_FLAGS |
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REVLOGV1_FLAGS = FLAG_INLINE_DATA | FLAG_GENERALDELTA |
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REVLOGV2_FLAGS = FLAG_INLINE_DATA |
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# revlog index flags |
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# For historical reasons, revlog's internal flags were exposed via the |
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# wire protocol and are even exposed in parts of the storage APIs. |
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# revision has censor metadata, must be verified |
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REVIDX_ISCENSORED = repository.REVISION_FLAG_CENSORED |
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# revision hash does not match data (narrowhg) |
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REVIDX_ELLIPSIS = repository.REVISION_FLAG_ELLIPSIS |
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# revision data is stored externally |
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REVIDX_EXTSTORED = repository.REVISION_FLAG_EXTSTORED |
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# revision data contains extra metadata not part of the official digest |
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REVIDX_SIDEDATA = repository.REVISION_FLAG_SIDEDATA |
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# revision changes files in a way that could affect copy tracing. |
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REVIDX_HASCOPIESINFO = repository.REVISION_FLAG_HASCOPIESINFO |
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REVIDX_DEFAULT_FLAGS = 0 |
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# stable order in which flags need to be processed and their processors applied |
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REVIDX_FLAGS_ORDER = [ |
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REVIDX_ISCENSORED, |
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REVIDX_ELLIPSIS, |
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REVIDX_EXTSTORED, |
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REVIDX_SIDEDATA, |
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REVIDX_HASCOPIESINFO, |
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] |
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# bitmark for flags that could cause rawdata content change |
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REVIDX_RAWTEXT_CHANGING_FLAGS = ( |
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REVIDX_ISCENSORED | REVIDX_EXTSTORED | REVIDX_SIDEDATA |
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) |
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SPARSE_REVLOG_MAX_CHAIN_LENGTH = 1000 |