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annotate mercurial/revlogutils/flagutil.py @ 42748:5109217a9ab6

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flagutil: move insertflagprocessor to the new module (API)
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Thu, 08 Aug 2019 01:25:37 +0200
parents 92ac6b1697a7
children 6d61be152c55
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ca5ca3badd3c flagutil: create a `mercurial.revlogutils.flagutil` module
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1 # flagutils.py - code to deal with revlog flags and their processors
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2 #
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3 # Copyright 2016 Remi Chaintron <remi@fb.com>
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4 # Copyright 2016-2019 Pierre-Yves David <pierre-yves.david@ens-lyon.org>
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5 #
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6 # This software may be used and distributed according to the terms of the
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7 # GNU General Public License version 2 or any later version.
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8
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9 from __future__ import absolute_import
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10
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11 from ..i18n import _
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12
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13 from .constants import (
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14 REVIDX_DEFAULT_FLAGS,
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15 REVIDX_ELLIPSIS,
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16 REVIDX_EXTSTORED,
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17 REVIDX_FLAGS_ORDER,
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18 REVIDX_ISCENSORED,
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19 REVIDX_RAWTEXT_CHANGING_FLAGS,
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20 )
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21
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22 from .. import (
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23 error,
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24 util
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25 )
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26
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27 # blanked usage of all the name to prevent pyflakes constraints
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28 # We need these name available in the module for extensions.
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29 REVIDX_ISCENSORED
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30 REVIDX_ELLIPSIS
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31 REVIDX_EXTSTORED
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32 REVIDX_DEFAULT_FLAGS
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33 REVIDX_FLAGS_ORDER
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34 REVIDX_RAWTEXT_CHANGING_FLAGS
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35
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36 REVIDX_KNOWN_FLAGS = util.bitsfrom(REVIDX_FLAGS_ORDER)
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37
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38 # Store flag processors (cf. 'addflagprocessor()' to register)
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39 flagprocessors = {
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40 REVIDX_ISCENSORED: None,
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41 }
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42
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43 def insertflagprocessor(flag, processor, flagprocessors):
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44 if not flag & REVIDX_KNOWN_FLAGS:
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45 msg = _("cannot register processor on unknown flag '%#x'.") % (flag)
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46 raise error.ProgrammingError(msg)
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47 if flag not in REVIDX_FLAGS_ORDER:
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48 msg = _("flag '%#x' undefined in REVIDX_FLAGS_ORDER.") % (flag)
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49 raise error.ProgrammingError(msg)
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50 if flag in flagprocessors:
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51 msg = _("cannot register multiple processors on flag '%#x'.") % (flag)
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52 raise error.Abort(msg)
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53 flagprocessors[flag] = processor