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annotate hgext/lfs/pointer.py @ 36602:e30be4d2ac60

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lfs: use byteskwargs() on some **kwargs for python 3 compat Differential Revision: https://phab.mercurial-scm.org/D2566
author Augie Fackler <augie@google.com>
date Fri, 02 Mar 2018 11:07:07 -0500
parents 95bd9e396774
children fb6226c15e54
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1 # pointer.py - Git-LFS pointer serialization
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2 #
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3 # Copyright 2017 Facebook, Inc.
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from __future__ import absolute_import
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9
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10 import re
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11
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12 from mercurial.i18n import _
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13
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14 from mercurial import (
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15 error,
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16 pycompat,
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17 )
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18
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19 class InvalidPointer(error.RevlogError):
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20 pass
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21
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22 class gitlfspointer(dict):
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23 VERSION = 'https://git-lfs.github.com/spec/v1'
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24
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25 def __init__(self, *args, **kwargs):
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26 self['version'] = self.VERSION
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27 super(gitlfspointer, self).__init__(*args)
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28 self.update(pycompat.byteskwargs(kwargs))
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29
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30 @classmethod
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31 def deserialize(cls, text):
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32 try:
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33 return cls(l.split(' ', 1) for l in text.splitlines()).validate()
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34 except ValueError: # l.split returns 1 item instead of 2
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35 raise InvalidPointer(_('cannot parse git-lfs text: %r') % text)
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36
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37 def serialize(self):
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38 sortkeyfunc = lambda x: (x[0] != 'version', x)
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39 items = sorted(self.validate().iteritems(), key=sortkeyfunc)
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40 return ''.join('%s %s\n' % (k, v) for k, v in items)
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41
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42 def oid(self):
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43 return self['oid'].split(':')[-1]
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44
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45 def size(self):
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46 return int(self['size'])
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47
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48 # regular expressions used by _validate
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49 # see https://github.com/git-lfs/git-lfs/blob/master/docs/spec.md
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50 _keyre = re.compile(br'\A[a-z0-9.-]+\Z')
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51 _valuere = re.compile(br'\A[^\n]*\Z')
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52 _requiredre = {
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53 'size': re.compile(br'\A[0-9]+\Z'),
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54 'oid': re.compile(br'\Asha256:[0-9a-f]{64}\Z'),
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55 'version': re.compile(br'\A%s\Z' % re.escape(VERSION)),
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56 }
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57
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58 def validate(self):
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59 """raise InvalidPointer on error. return self if there is no error"""
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60 requiredcount = 0
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61 for k, v in self.iteritems():
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62 if k in self._requiredre:
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63 if not self._requiredre[k].match(v):
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64 raise InvalidPointer(_('unexpected value: %s=%r') % (k, v))
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65 requiredcount += 1
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66 elif not self._keyre.match(k):
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67 raise InvalidPointer(_('unexpected key: %s') % k)
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68 if not self._valuere.match(v):
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69 raise InvalidPointer(_('unexpected value: %s=%r') % (k, v))
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70 if len(self._requiredre) != requiredcount:
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71 miss = sorted(set(self._requiredre.keys()).difference(self.keys()))
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72 raise InvalidPointer(_('missed keys: %s') % ', '.join(miss))
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73 return self
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74
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75 deserialize = gitlfspointer.deserialize