36 lines
971 B
Python
36 lines
971 B
Python
"""An implementation of PEP-425 tag parsing, expansion and compression."""
|
|
|
|
import typing as t
|
|
|
|
|
|
class Tag(t.NamedTuple):
|
|
python: str
|
|
abi: str
|
|
arch: str # 'Platform' in the PEP
|
|
|
|
|
|
def decompress_tag(tag: str) -> t.Iterable[Tag]:
|
|
"""Decompress tag string into a sequence of compatible tuples."""
|
|
|
|
pytags, abitags, archtags = tag.split("-", 2)
|
|
for x in pytags.split('.'):
|
|
for y in abitags.split('.'):
|
|
for z in archtags.split('.'):
|
|
yield Tag(x, y, z)
|
|
|
|
|
|
def compress_tags(tags: t.Iterable[Tag]) -> str:
|
|
"""Compress a tag sequence into a string encoding compatible tuples."""
|
|
|
|
tags = set(tags)
|
|
pytags = set(t.python for t in tags)
|
|
abitags = set(t.abi for t in tags)
|
|
archtags = set(t.arch for t in tags)
|
|
|
|
tag = "-".join([
|
|
".".join(sorted(pytags)),
|
|
".".join(sorted(abitags)),
|
|
".".join(sorted(archtags)),
|
|
])
|
|
assert set(decompress_tag(tag)) == tags
|
|
return tag
|