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JuliaIO / HDF5.jl

Save and load data in the HDF5 file format from Julia
https://juliaio.github.io/HDF5.jl
MIT License
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Convert H5Z*.jl packages into package extensions #1160

Open mkitti opened 3 months ago

mkitti commented 3 months ago

The H5Z*.jl packages such as H5Zblosc.jl implement HDF5 filter plugins. These were written before the advent of package extensions in Julia 1.9.

This pull request converts the implementations of the H5Z.jl packages into package extensions. The H5Z.jl packages are transitional packages that are shells of their former selves. They only serve two purposes:

  1. Load the weak dependency to trigger the package extension to load.
  2. Export the filter

After this pull request loading the H5Z*.jl packages could be replaced by loading the weak dependency directly. For example H5Zblosc.jl could be replaced by loading Blosc.jl. Another example is that H5Zlz4.jl could be replaced by loading CodecLZ4.jl.

Exporting the filter could be provided by leaving a function stub with no methods in HDF5.jl. For example, function BloscFilter end could be declared in HDF5.jl and then implemented in the package extensions.