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env: prevent warning from being emitted on venv creation #420

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merged 4 commits into from
Jan 5, 2022
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env: prevent warning from being emitted on venv creation #420

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fd26419
env: prevent warning from being emitted on venv creation
layday Dec 24, 2021
8ca05dc
tests: fix logging line nos
layday Dec 24, 2021
234f8de
fixup! env: prevent warning from being emitted on venv creation
layday Jan 5, 2022
8c9262a
tests: fix line nos, again
layday Jan 5, 2022
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7 changes: 6 additions & 1 deletion src/build/env.py
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Original file line number Diff line number Diff line change
Expand Up @@ -92,7 +92,12 @@ def __enter__(self) -> IsolatedEnv:

:return: The isolated build environment
"""
self._path = tempfile.mkdtemp(prefix='build-env-')
# Call ``realpath`` to prevent spurious warning from being emitted
# that the venv location has changed on Windows. The username is
# DOS-encoded in the output of tempfile - the location is the same
# but the representation of it is different, which confuses venv.
# Ref: https://bugs.python.org/issue46171
self._path = os.path.realpath(tempfile.mkdtemp(prefix='build-env-'))
try:
# use virtualenv when available (as it's faster than venv)
if _should_use_virtualenv():
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2 changes: 1 addition & 1 deletion tests/test_env.py
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Expand Up @@ -112,7 +112,7 @@ def test_isolated_env_log(mocker, caplog, package_test_flit):
('INFO', 'Installing packages in isolated environment... (something)'),
]
if sys.version_info >= (3, 8): # stacklevel
assert [(record.lineno) for record in caplog.records] == [105, 102, 193]
assert [(record.lineno) for record in caplog.records] == [105, 107, 198]


@pytest.mark.isolated
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