1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
"""Module for dealing with entry points."""
from typing import Optional, Set
# TODO importlib.metadata was introduced into the standard library in python 3.8
# so we can change this when we drop support for 3.7
# also, from importlib_metadata changed its API in v4.0, to use the python 3.10 API
# however, because of https://github.com/python/importlib_metadata/issues/308
# we do not assume that we have this API, and instead use try/except for the new/old APIs
from importlib.metadata import EntryPoint
from importlib.metadata import entry_points as eps
ENTRY_POINT_GROUP_READER = "jcache.readers"
ENTRY_POINT_GROUP_EXEC = "jcache.executors"
def list_group_names(group: str) -> Set[str]:
"""Return the entry points within a group."""
all_eps = eps()
try:
# importlib_metadata v4 / python 3.10
return all_eps.select(group=group).names
except (AttributeError, TypeError):
return {ep.name for ep in all_eps.get(group, [])}
def get_entry_point(group: str, name: str) -> Optional[EntryPoint]:
"""Return the entry point with the given name in the given group."""
all_eps = eps()
try:
# importlib_metadata v4 / python 3.10
found = all_eps.select(group=group, name=name)
ep = found[name] if name in found.names else None
except (AttributeError, TypeError):
found = {ep.name: ep for ep in all_eps.get(group, [])}
ep = found[name] if name in found else None
return ep
|
