ci: fix coverage combine for different OS's

nox/_version.py

@@ -21,9 +21,9 @@
 from packaging.specifiers import InvalidSpecifier, SpecifierSet
 from packaging.version import InvalidVersion, Version
 
-if sys.version_info >= (3, 8):  # pragma: no cover
+if sys.version_info >= (3, 8):
     import importlib.metadata as metadata
-else:  # pragma: no cover
+else:
     import importlib_metadata as metadata
 
 

nox/command.py

@@ -24,9 +24,9 @@
 from nox.logger import logger
 from nox.popen import popen
 
-if sys.version_info < (3, 8):  # pragma: no cover
+if sys.version_info < (3, 8):
     from typing_extensions import Literal
-else:  # pragma: no cover
+else:
     from typing import Literal
 
 ExternalType = Literal["error", True, False]
@@ -62,7 +62,7 @@ def _clean_env(env: Mapping[str, str] | None = None) -> dict[str, str] | None:
     clean_env: dict[str, str] = {}
 
     # Ensure systemroot is passed down, otherwise Windows will explode.
-    if sys.platform == "win32":  # pragma: no cover
+    if sys.platform == "win32":
         clean_env["SYSTEMROOT"] = os.environ.get("SYSTEMROOT", "")
 
     clean_env.update(env)

nox/logger.py

@@ -80,16 +80,12 @@ def __init__(self, name: str, level: int = logging.NOTSET):
         logging.addLevelName(OUTPUT, "OUTPUT")
 
     def success(self, msg: str, *args: Any, **kwargs: Any) -> None:
-        if self.isEnabledFor(SUCCESS):
+        if self.isEnabledFor(SUCCESS):  # pragma: no cover
             self._log(SUCCESS, msg, args, **kwargs)
-        else:  # pragma: no cover
-            pass
 
     def output(self, msg: str, *args: Any, **kwargs: Any) -> None:
-        if self.isEnabledFor(OUTPUT):
+        if self.isEnabledFor(OUTPUT):  # pragma: no cover
             self._log(OUTPUT, msg, args, **kwargs)
-        else:  # pragma: no cover
-            pass
 
 
 logging.setLoggerClass(LoggerWithSuccessAndOutput)

noxfile.py

@@ -15,10 +15,12 @@
 
 from __future__ import annotations
 
+import contextlib
 import functools
 import os
 import platform
 import shutil
+import sqlite3
 import sys
 
 import nox
@@ -49,23 +51,32 @@ def tests(session: nox.Session, tox_version: str) -> None:
     if session.python == "3.7" and tox_version == "latest":
         return
 
+    coverage_file = (
+        f".coverage.{sys.platform}.{session.python}.tox{tox_version.lstrip('<')}"
+    )
+
     session.create_tmp()  # Fixes permission errors on Windows
     session.install("-r", "requirements-test.txt")
-    session.install("-e", ".[tox_to_nox]")
+    session.install("-e.[tox_to_nox]")
     if tox_version != "latest":
         session.install(f"tox{tox_version}")
     session.run(
         "pytest",
-        "--cov=nox",
+        "--cov",
         "--cov-config",
         "pyproject.toml",
         "--cov-report=",
         *session.posargs,
         env={
-            "COVERAGE_FILE": f".coverage.{session.python}.tox.{tox_version.lstrip('<')}"
+            "COVERAGE_FILE": coverage_file,
         },
     )
 
+    if sys.platform.startswith("win"):
+        with contextlib.closing(sqlite3.connect(coverage_file)) as con, con:
+            con.execute("UPDATE file SET path = REPLACE(path, '\\', '/')")
+            con.execute("DELETE FROM file WHERE SUBSTR(path, 2, 1) == ':'")
+
 
 @nox.session(python=["3.7", "3.8", "3.9", "3.10"], venv_backend="conda")
 def conda_tests(session: nox.Session) -> None:
@@ -84,7 +95,7 @@ def cover(session: nox.Session) -> None:
     if ON_WINDOWS_CI:
         return
 
-    session.install("coverage[toml]")
+    session.install("coverage[toml]>=5.3")
     session.run("coverage", "combine")
     session.run("coverage", "report", "--fail-under=100", "--show-missing")
     session.run("coverage", "erase")

pyproject.toml

@@ -98,8 +98,9 @@ testpaths = [ "tests" ]
 
 [tool.coverage.run]
 branch = true
-relative_files = true
 omit = [ "nox/_typing.py" ]
+relative_files = true
+source_pkgs = [ "nox" ]
 
 [tool.coverage.report]
 exclude_lines = [ "pragma: no cover", "if TYPE_CHECKING:", "@overload" ]

requirements-test.txt

@@ -1,3 +1,4 @@
+coverage[toml]>=5.3
 flask
 myst-parser
 pytest>=6.0