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fetchPypi doesn't use python under the hood and doesn't need to be tied to a specific version of python. Moving it to top level makes it more consistent with other fetchers and makes code generation easier.
28 lines
1.2 KiB
Nix
28 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, dist ? "py2.py3", 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/${dist}/${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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