Mercurial > hgrepos > Python > apps > py-cutils

comparison cutils/util/__init__.py @ 173:e081b6ee5570

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treesum.py now runs on Python3.4 also: use a workaround for its missing byte % formatting. No extra module is required for it to run using sha SHA and SHA-2 family of digests.
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 10 Jan 2025 12:46:44 +0100
parents 804a823c63f5
children 6154b8e4ba94
comparison
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172:804a823c63f5 173:e081b6ee5570
6 r"""Utility package. 6 r"""Utility package.
7 7
8 """ 8 """
9 9
10 __all__ = ["PY2", 10 __all__ = ["PY2",
11 "PY35",
11 "normalize_filename", 12 "normalize_filename",
12 "argv2algo", 13 "argv2algo",
13 "algotag2algotype", 14 "algotag2algotype",
14 "get_blake2b", 15 "get_blake2b",
15 "get_blake2b_256", 16 "get_blake2b_256",
24 import os 25 import os
25 import sys 26 import sys
26 27
27 28
28 PY2 = sys.version_info[0] < 3 29 PY2 = sys.version_info[0] < 3
30 PY35 = sys.version_info[:2] >= (3, 5)
29 31
30 32
31 def default_algotag(): 33 def default_algotag():
32 """Determine the "best" default algorithm. 34 """Determine the "best" default algorithm.
33 35
189 191
190 """ 192 """
191 if isinstance(what, bytes): 193 if isinstance(what, bytes):
192 return what 194 return what
193 return os.fsencode(what) 195 return os.fsencode(what)
196
197
198 def interpolate_bytes(formatstr, *values):
199 """Interpolate byte strings also on Python 3.4.
200
201 :param bytes formatstr:
202 :param values: params for interpolation: may *not* contain Unicode strings
203 :rvalue: the formatted octet
204 :rtype: bytes
205
206 """
207 assert isinstance(formatstr, bytes)
208 # Python 3.5+ or Python2 know how to interpolate byte strings
209 if PY35 or PY2:
210 return formatstr % values
211 # Workaround with a Latin-1 dance
212 tformatstr = formatstr.decode("latin1")
213 tvalues = []
214 for v in values:
215 if PY2:
216 if isinstance(v, unicode): # noqa: F821 undefined name 'unicode'
217 assert False
218 else:
219 if isinstance(v, str):
220 assert False
221 if isinstance(v, bytes):
222 tvalues.append(v.decode("latin1"))
223 else:
224 tvalues.append(v)
225 return (tformatstr % tuple(tvalues)).encode("latin1")