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  • Kyle Lippincott's avatar
    tests: make check-py3-compat.py actually load the specified files correctly · 4e5da64d5549
    Kyle Lippincott authored
    For most uses, this change is essentially a no-op, as this script is generally
    only run by test-check-py3-compat.t, which will already put `$TESTDIR/..` in
    `$PYTHONPATH`.
    
    When running outside of tests, however, `$PYTHONPATH` is likely not set, causing
    check-py3-compat.py to parse the file from the repo, but then import the
    installed version, and raise any errors about the installed version, not the one
    currently in the repo.
    
    Additionally, this helps users (like me) who have a strange set up where their
    home directory (and thus their hg repos) happen to be in a subdirectory of
    sys.prefix (which is /usr on my system). Since the '.' entry added to sys.path
    takes precedence over the absolute path of `$TESTDIR/..` in `$PYTHONPATH`, the
    path to the modules that it imports (and that show up in any stack trace) are
    *relative*, meaning that we don't detect them as starting with `sys.prefix`.
    
    Sample non-test invocation, and the differenc...
    4e5da64d5549