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refactor: move core information to its own class and file
This simplifies calling into Collector, and will make core information available in more places.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| # Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0 | ||
| # For details: https://github.com/nedbat/coveragepy/blob/master/NOTICE.txt | ||
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| """Management of core choices.""" | ||
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| from __future__ import annotations | ||
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| import os | ||
| import sys | ||
| from typing import Any | ||
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| from coverage import env | ||
| from coverage.disposition import FileDisposition | ||
| from coverage.exceptions import ConfigError | ||
| from coverage.pytracer import PyTracer | ||
| from coverage.sysmon import SysMonitor | ||
| from coverage.types import TFileDisposition, Tracer, TWarnFn | ||
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| try: | ||
| # Use the C extension code when we can, for speed. | ||
| from coverage.tracer import CTracer, CFileDisposition | ||
| HAS_CTRACER = True | ||
| except ImportError: | ||
| # Couldn't import the C extension, maybe it isn't built. | ||
| if os.getenv("COVERAGE_CORE") == "ctrace": # pragma: part covered | ||
| # During testing, we use the COVERAGE_CORE environment variable | ||
| # to indicate that we've fiddled with the environment to test this | ||
| # fallback code. If we thought we had a C tracer, but couldn't import | ||
| # it, then exit quickly and clearly instead of dribbling confusing | ||
| # errors. I'm using sys.exit here instead of an exception because an | ||
| # exception here causes all sorts of other noise in unittest. | ||
| sys.stderr.write("*** COVERAGE_CORE is 'ctrace' but can't import CTracer!\n") | ||
| sys.exit(1) | ||
| HAS_CTRACER = False | ||
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| class Core: | ||
| """Information about the central technology enabling execution measurement.""" | ||
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| tracer_class: type[Tracer] | ||
| tracer_kwargs: dict[str, Any] | ||
| file_disposition_class: type[TFileDisposition] | ||
| supports_plugins: bool | ||
| packed_arcs: bool | ||
| systrace: bool | ||
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| def __init__(self, warn: TWarnFn, timid: bool, metacov: bool) -> None: | ||
| core_name: str | None | ||
| if timid: | ||
| core_name = "pytrace" | ||
| else: | ||
| core_name = os.getenv("COVERAGE_CORE") | ||
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| if core_name == "sysmon" and not env.PYBEHAVIOR.pep669: | ||
| warn("sys.monitoring isn't available, using default core", slug="no-sysmon") | ||
| core_name = None | ||
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| if not core_name: | ||
| # Once we're comfortable with sysmon as a default: | ||
| # if env.PYBEHAVIOR.pep669 and self.should_start_context is None: | ||
| # core_name = "sysmon" | ||
| if HAS_CTRACER: | ||
| core_name = "ctrace" | ||
| else: | ||
| core_name = "pytrace" | ||
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| if core_name == "sysmon": | ||
| self.tracer_class = SysMonitor | ||
| self.tracer_kwargs = {"tool_id": 3 if metacov else 1} | ||
| self.file_disposition_class = FileDisposition | ||
| self.supports_plugins = False | ||
| self.packed_arcs = False | ||
| self.systrace = False | ||
| elif core_name == "ctrace": | ||
| self.tracer_class = CTracer | ||
| self.tracer_kwargs = {} | ||
| self.file_disposition_class = CFileDisposition | ||
| self.supports_plugins = True | ||
| self.packed_arcs = True | ||
| self.systrace = True | ||
| elif core_name == "pytrace": | ||
| self.tracer_class = PyTracer | ||
| self.tracer_kwargs = {} | ||
| self.file_disposition_class = FileDisposition | ||
| self.supports_plugins = False | ||
| self.packed_arcs = False | ||
| self.systrace = True | ||
| else: | ||
| raise ConfigError(f"Unknown core value: {core_name!r}") |
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