Samuel Dionne-Riel f9b16e60da pythonPackages.protobuf: apply patch for python 3.7 only when building with it ... Change introduced in #50672. The patch does not apply on older protobuf like protobuf3_1 ``` $ nix-build -E 'with import ./. { }; python3Packages.protobuf.override { protobuf = protobuf3_1; }' unpacking sources unpacking source archive /nix/store/1zdyl0cxaa8ha2v1zp75zzdjd6j99d0m-source source root is source setting SOURCE_DATE_EPOCH to timestamp 315619200 of file source/util/python/BUILD patching sources applying patch /nix/store/yagx7hvylnnjq7lxbcia0y5lq1r736w3-0a59054c30e4f0ba10f10acfc1d7f3814c63e1a7.patch patching file google/protobuf/pyext/descriptor.cc Hunk #1 succeeded at 55 (offset -1 lines). patching file google/protobuf/pyext/descriptor_containers.cc patching file google/protobuf/pyext/descriptor_pool.cc Hunk #1 succeeded at 47 (offset -1 lines). patching file google/protobuf/pyext/extension_dict.cc Hunk #1 FAILED at 53. 1 out of 1 hunk FAILED -- saving rejects to file google/protobuf/pyext/extension_dict.cc.rej patching file google/protobuf/pyext/message.cc Hunk #1 succeeded at 82 (offset 3 lines). Hunk #2 succeeded at 1425 (offset -104 lines). ``` Since the patch isn't necessary on python versions older than 3.7, let's only apply it for version 3.7. This means that most things using older protobuf implementation will now be able to build when using an older pythonPackage set (as is most probably the case anyway). This still leaves protobuf 3.1 using packages hanging, but the errors will be localized to those that would be breaking anyway with the upgrade to 3.7 as default python.		2018-12-11 11:30:52 +01:00
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