feat(extgen): make the generator idempotent and avoid touching the original source #2011
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Requires #2086 to be merged first |
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…2086) While continuing the work on #2011, I realized that constant declarations have a problem when using `iota`. I mean, it technically works, but const *blocks* we not supported which means that setting all constants to `iota` as shown in the documentation was non-sensical, as `iota` resets every time outside of const blocks. So, this is between the bug fix and the feature. To me, it's a bug fix as the behavior wasn't the one intended when creating extgen.
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The DX is currently not optimal as we need to touch and edit the original source file. It is still in WIP, but this PR aims to improve a lot the DX of the extension generator by making it idempotent.
The proposed approach is to generate a wrapper to the original source file that will call it and then make the bindings to C. The original Go source will remain untouched and the generator can be run multiple times easily.
This also adds a header comment to all generated files (C file, C headers et al.):