[3.7] bpo-34022: Stop forcing of hash-based invalidation with SOURCE_DATE_EPOCH (GH-9607)#10775
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…POCH (pythonGH-9607) Unconditional forcing of ``CHECKED_HASH`` invalidation was introduced in 3.7.0 in bpo-29708. The change is bad, as it unconditionally overrides *invalidation_mode*, even if it was passed as an explicit argument to ``py_compile.compile()`` or ``compileall``. An environment variable should *never* override an explicit argument to a library function. That change leads to multiple test failures if the ``SOURCE_DATE_EPOCH`` environment variable is set. This changes ``py_compile.compile()`` to only look at ``SOURCE_DATE_EPOCH`` if no explicit *invalidation_mode* was specified. I also made various relevant tests run with explicit control over the value of ``SOURCE_DATE_EPOCH``. While looking at this, I noticed that ``zipimport`` does not work with hash-based .pycs _at all_, though I left the fixes for subsequent commits. (cherry picked from commit a6b3ec5) Co-authored-by: Elvis Pranskevichus <elvis@magic.io>
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miss-islington commented Nov 28, 2018
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Unconditional forcing of
CHECKED_HASHinvalidation was introduced in3.7.0 in bpo-29708. The change is bad, as it unconditionally overrides
invalidation_mode, even if it was passed as an explicit argument to
py_compile.compile()orcompileall. An environment variableshould never override an explicit argument to a library function.
That change leads to multiple test failures if the
SOURCE_DATE_EPOCHenvironment variable is set.
This changes
py_compile.compile()to only look atSOURCE_DATE_EPOCHif no explicit invalidation_mode was specified.I also made various relevant tests run with explicit control over the
value of
SOURCE_DATE_EPOCH.While looking at this, I noticed that
zipimportdoes not workwith hash-based .pycs at all, though I left the fixes for
subsequent commits.
(cherry picked from commit a6b3ec5)
Co-authored-by: Elvis Pranskevichus elvis@magic.io
https://bugs.python.org/issue34022