Mercurial > hg
view mercurial/node.py @ 40635:acd17caa699a
requires: use atomictemp=True when writing .hg/requires
We use an unusual file system at Google that allows writes (and
renames) but not deletions (for certain paths). That causes problems
when writing the requires files without atomictemp=True. There doesn't
appear to be any real drawbacks to using atomictemp, so I'm hoping we
can just change it in core.
Differential Revision: https://phab.mercurial-scm.org/D5274
author | Martin von Zweigbergk <martinvonz@google.com> |
---|---|
date | Wed, 14 Nov 2018 11:30:46 -0800 |
parents | 1e7a462cb946 |
children | 57875cf423c9 |
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# node.py - basic nodeid manipulation for mercurial # # Copyright 2005, 2006 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 import binascii # This ugly style has a noticeable effect in manifest parsing hex = binascii.hexlify # Adapt to Python 3 API changes. If this ends up showing up in # profiles, we can use this version only on Python 3, and forward # binascii.unhexlify like we used to on Python 2. def bin(s): try: return binascii.unhexlify(s) except binascii.Error as e: raise TypeError(e) nullrev = -1 # In hex, this is '0000000000000000000000000000000000000000' nullid = b"\0" * 20 nullhex = hex(nullid) # Phony node value to stand-in for new files in some uses of # manifests. # In hex, this is '2121212121212121212121212121212121212121' newnodeid = '!!!!!!!!!!!!!!!!!!!!' # In hex, this is '3030303030303030303030303030306164646564' addednodeid = '000000000000000added' # In hex, this is '3030303030303030303030306d6f646966696564' modifiednodeid = '000000000000modified' wdirfilenodeids = {newnodeid, addednodeid, modifiednodeid} # pseudo identifiers for working directory # (they are experimental, so don't add too many dependencies on them) wdirrev = 0x7fffffff # In hex, this is 'ffffffffffffffffffffffffffffffffffffffff' wdirid = b"\xff" * 20 wdirhex = hex(wdirid) def short(node): return hex(node[:6])