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29 lines
1.2 KiB
Nix
29 lines
1.2 KiB
Nix
# `fetchPypi` function for fetching artifacts from PyPI.
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{ fetchurl
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, makeOverridable
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}:
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let
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computeUrl = {format ? "setuptools", ... } @attrs: let
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computeWheelUrl = {pname, version, python ? "py2.py3", abi ? "none", platform ? "any"}:
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# Fetch a wheel. By default we fetch an universal wheel.
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# See https://www.python.org/dev/peps/pep-0427/#file-name-convention for details regarding the optional arguments.
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"https://files.pythonhosted.org/packages/${python}/${builtins.substring 0 1 pname}/${pname}/${pname}-${version}-${python}-${abi}-${platform}.whl";
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computeSourceUrl = {pname, version, extension ? "tar.gz"}:
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# Fetch a source tarball.
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"mirror://pypi/${builtins.substring 0 1 pname}/${pname}/${pname}-${version}.${extension}";
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compute = (if format == "wheel" then computeWheelUrl
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else if format == "setuptools" then computeSourceUrl
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else throw "Unsupported format ${format}");
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in compute (builtins.removeAttrs attrs ["format"]);
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in makeOverridable( {format ? "setuptools", sha256 ? "", hash ? "", ... } @attrs:
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let
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url = computeUrl (builtins.removeAttrs attrs ["sha256" "hash"]) ;
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in fetchurl {
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inherit url sha256 hash;
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})
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