python.pkgs.tensorflow{,-bin,-estimator,-tensorboard}-2: Init at 2.1.0

Major breaking change from 1.x, so treating keeping both versions for now.

(adapted from 33f11be707)
(adapted from 9e8dea7986)

pkgs/development/python-modules/tensorflow-tensorboard/2/default.nix

@@ -0,0 +1,68 @@
+{ lib, fetchPypi, buildPythonPackage, isPy3k
+, numpy
+, wheel
+, werkzeug
+, protobuf
+, grpcio
+, markdown
+, futures
+, absl-py
+, google-auth-oauthlib
+}:
+
+# tensorflow/tensorboard is built from a downloaded wheel, because
+# https://github.com/tensorflow/tensorboard/issues/719 blocks
+# buildBazelPackage.
+
+buildPythonPackage rec {
+  pname = "tensorflow-tensorboard";
+  version = "2.1.0";
+  format = "wheel";
+
+  src = fetchPypi ({
+    pname = "tensorboard";
+    inherit version;
+    format = "wheel";
+  } // (if isPy3k then {
+    python = "py3";
+    sha256 = "1wpjdzhjpcdkyaahzd4bl71k4l30z5c55280ndiwj32hw70lxrp6";
+  } else {
+    python = "py2";
+    sha256 = "1f805839xa36wxb7xac9fyxzaww92vw4d50vs6g61wnlr4byp00w";
+  }));
+
+  propagatedBuildInputs = [
+    numpy
+    werkzeug
+    protobuf
+    markdown
+    grpcio
+    absl-py
+    google-auth-oauthlib
+    # not declared in install_requires, but used at runtime
+    # https://github.com/NixOS/nixpkgs/issues/73840
+    wheel
+  ] ++ lib.optional (!isPy3k) futures;
+
+  # in the absence of a real test suite, run cli and imports
+  checkPhase = ''
+    $out/bin/tensorboard --help > /dev/null
+  '';
+
+  pythonImportsCheck = [
+    "tensorboard"
+    "tensorboard.backend"
+    "tensorboard.compat"
+    "tensorboard.data"
+    "tensorboard.plugins"
+    "tensorboard.summary"
+    "tensorboard.util"
+  ];
+
+  meta = with lib; {
+    description = "TensorFlow's Visualization Toolkit";
+    homepage = http://tensorflow.org;
+    license = licenses.asl20;
+    maintainers = with maintainers; [ abbradar ];
+  };
+}