fix: stricter input parsing and more lenient parsing of run exports from other packages #1271
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We currently parse
python 3
aspython ==3
which is a deviation from conda-build (which has some complicated logic to add stars sometimes).With this PR we simplify the logic and ask the user to provide operators, such as
>=3
,3.*
,==3
etc.At the same time we were parsing run exports from other packages in "strict" mode. This did break for some packages (such as
libabseil
which has a run export in the form oflibabseil =*=*cpp17
that doesn't parse in strict mode).