mercurial/node.py
author Augie Fackler <augie@google.com>
Wed, 14 Feb 2018 21:34:12 -0500
changeset 36238 f574cc00831a
parent 32684 af854b1b36f8
child 37448 d7114f883505
permissions -rw-r--r--
node: make bin() be a wrapper instead of just an alias This includes a full backout of 59affe7e and 30d0cb27. Per the review of the former, we'd rather adapt the API to behave like it used to (at least for now), and take a second run at it if it shows up in our performance numbers. I ran perfrevlogindex with and without this change and it didn't make a measurable difference, so maybe it's fine (despite my intuition to the contrary). Differential Revision: https://phab.mercurial-scm.org/D2279
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# node.py - basic nodeid manipulation for mercurial
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#
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# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
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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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from __future__ import absolute_import
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import binascii
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# This ugly style has a noticeable effect in manifest parsing
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hex = binascii.hexlify
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# Adapt to Python 3 API changes. If this ends up showing up in
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# profiles, we can use this version only on Python 3, and forward
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# binascii.unhexlify like we used to on Python 2.
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def bin(s):
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    try:
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        return binascii.unhexlify(s)
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    except binascii.Error as e:
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        raise TypeError(e)
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nullrev = -1
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nullid = b"\0" * 20
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nullhex = hex(nullid)
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# Phony node value to stand-in for new files in some uses of
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# manifests.
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newnodeid = '!' * 20
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addednodeid = ('0' * 15) + 'added'
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modifiednodeid = ('0' * 12) + 'modified'
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wdirnodes = {newnodeid, addednodeid, modifiednodeid}
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# pseudo identifiers for working directory
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# (they are experimental, so don't add too many dependencies on them)
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wdirrev = 0x7fffffff
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wdirid = b"\xff" * 20
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wdirhex = hex(wdirid)
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def short(node):
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    return hex(node[:6])