Simplify extension setup.#11964
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Rebased on top of #11983 which makes things a bit simpler. |
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Done. |
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Marking release critical so it gets some love.. I'd review, but really don't grok whats going on here. But if someone more knowledgeable reviewed, I'd be comfortable approving as not doing anything dangerous. |
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Sorry, can’t help either. Not experienced in setuptools. |
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As discussed on call this simplifies the build process and we will not discover any edge cases until we try to build all of the wheels / packages.
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@tacaswell do you want to entice a second reviewer? :) |
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Dunno if you want to change this one line.
setupext currently has a complex machinery to define extension modules. Essentially, the problem is that numpy may not be installed at the time the extensions are declared, so we can't call np.get_include() to get the include paths. So we use a DelayedExtension class and a hook mechanism to inject the numpy include path later, once it becomes available. Instead, we can just declare a dummy extension (so that setuptools doesn't elide the call to build_ext), then swap in the correct extensions in build_ext.finalize_options(): at that point, numpy will have been installed and we don't need any crazy machinery.
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Going to merge based on two previous +ive reviews. |
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…964-on-v3.1.x Backport PR #11964 on branch v3.1.x (Simplify extension setup.)
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setupext currently has a complex machinery to define extension modules.
Essentially, the problem is that numpy may not be installed at the time
the extensions are declared, so we can't call np.get_include() to get
the include paths. So we use a DelayedExtension class and a hook
mechanism to inject the numpy include path later, once it becomes
available.
Instead, we can just declare a dummy extension (so that setuptools
doesn't elide the call to build_ext), then swap in the correct
extensions in build_ext.finalize_options(): at that point, numpy will
have been installed and we don't need any crazy machinery.
Also closes #6928 by not attempting to reload numpy anymore.
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