Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/pluggy/_tracing.py: 50%
Shortcuts on this page
r m x toggle line displays
j k next/prev highlighted chunk
0 (zero) top of page
1 (one) first highlighted chunk
Shortcuts on this page
r m x toggle line displays
j k next/prev highlighted chunk
0 (zero) top of page
1 (one) first highlighted chunk
1"""
2Tracing utils
3"""
5from __future__ import annotations
7from typing import Any
8from typing import Callable
9from typing import Sequence
10from typing import Tuple
13_Writer = Callable[[str], object]
14_Processor = Callable[[Tuple[str, ...], Tuple[Any, ...]], object]
17class TagTracer:
18 def __init__(self) -> None:
19 self._tags2proc: dict[tuple[str, ...], _Processor] = {}
20 self._writer: _Writer | None = None
21 self.indent = 0
23 def get(self, name: str) -> TagTracerSub:
24 return TagTracerSub(self, (name,))
26 def _format_message(self, tags: Sequence[str], args: Sequence[object]) -> str:
27 if isinstance(args[-1], dict):
28 extra = args[-1]
29 args = args[:-1]
30 else:
31 extra = {}
33 content = " ".join(map(str, args))
34 indent = " " * self.indent
36 lines = ["{}{} [{}]\n".format(indent, content, ":".join(tags))]
38 for name, value in extra.items():
39 lines.append(f"{indent} {name}: {value}\n")
41 return "".join(lines)
43 def _processmessage(self, tags: tuple[str, ...], args: tuple[object, ...]) -> None:
44 if self._writer is not None and args:
45 self._writer(self._format_message(tags, args))
46 try:
47 processor = self._tags2proc[tags]
48 except KeyError:
49 pass
50 else:
51 processor(tags, args)
53 def setwriter(self, writer: _Writer | None) -> None:
54 self._writer = writer
56 def setprocessor(self, tags: str | tuple[str, ...], processor: _Processor) -> None:
57 if isinstance(tags, str):
58 tags = tuple(tags.split(":"))
59 else:
60 assert isinstance(tags, tuple)
61 self._tags2proc[tags] = processor
64class TagTracerSub:
65 def __init__(self, root: TagTracer, tags: tuple[str, ...]) -> None:
66 self.root = root
67 self.tags = tags
69 def __call__(self, *args: object) -> None:
70 self.root._processmessage(self.tags, args)
72 def get(self, name: str) -> TagTracerSub:
73 return self.__class__(self.root, self.tags + (name,))