pythonPackages: new fetchers

Inspired by https://github.com/NixOS/nixpkgs/pull/22257.
It is recommend to use fetchpypi and, when fetching a wheel, to pass
`format = "wheel"` (typically you can just `inherit format;`).

The hash type is fixed (for now) because this is the hash type PyPI
uses.
This commit is contained in:
Frederik Rietdijk 2017-02-01 14:38:58 +01:00
parent 7b6b7f6b78
commit 695ff0dc09

View file

@ -37,9 +37,30 @@ let
graphiteVersion = "0.9.15";
fetchwheel = {pname, version, sha256, python ? "py2.py3", abi ? "none", platform ? "any"}:
# Fetch a wheel. By default we fetch an universal wheel.
# See https://www.python.org/dev/peps/pep-0427/#file-name-convention for details regarding the optional arguments.
let
url = "https://files.pythonhosted.org/packages/${python}/${builtins.substring 0 1 pname}/${pname}/${pname}-${version}-${python}-${abi}-${platform}.whl";
in pkgs.fetchurl {inherit url sha256;};
fetchtarball = {pname, version, sha256}:
# Fetch a tarball.
let
url = "mirror://pypi/${builtins.substring 0 1 pname}/${pname}/${pname}-${version}.tar.gz";
in pkgs.fetchurl {inherit url sha256;};
fetchpypi = {format ? "setuptools", ... } @attrs:
let
fetcher = (if format == "wheel" then fetchwheel
else if format == "setuptools" then fetchtarball
else throw "Unsupported kind ${kind}");
in fetcher (builtins.removeAttrs attrs ["format"]);
in {
inherit python bootstrapped-pip pythonAtLeast pythonOlder isPy26 isPy27 isPy33 isPy34 isPy35 isPy36 isPyPy isPy3k mkPythonDerivation buildPythonPackage buildPythonApplication;
inherit fetchwheel fetchtarball fetchpypi;
# helpers