Add initial version for bazel.io build manager.

pkgs/development/tools/build-managers/bazel/default.nix

···
+{ stdenv, fetchFromGitHub, jdk, zip, zlib, protobuf, pkgconfig, libarchive, unzip, makeWrapper }:
+
+stdenv.mkDerivation rec {
+  name = "bazel-20150325.9a0dc1b2";
+
+  src = fetchFromGitHub {
+    owner = "google";
+    repo = "bazel";
+    rev = "9a0dc1b2";
+    sha256 = "1bgx12bnrqxz720ljn7kdzd4678p4mxldiylll3h0v5673vgrf5p";
+  };
+
+  buildInputs = [ pkgconfig protobuf zlib zip jdk libarchive unzip makeWrapper ];
+
+  installPhase = ''
+    PROTOC=protoc bash compile.sh
+    mkdir -p $out/bin $out/share
+    cp -R output $out/share/bazel
+    ln -s $out/share/bazel/bazel $out/bin/bazel
+    wrapProgram $out/bin/bazel --set JAVA_HOME "${jdk}"
+  '';
+
+  meta = {
+    homepage = http://github.com/google/bazel/;
+    description = "Build tool that builds code quickly and reliably";
+    license = stdenv.lib.licenses.asl20;
+  };
+}

pkgs/top-level/all-packages.nix

···
 
   bam = callPackage ../development/tools/build-managers/bam {};
 
+  bazel = callPackage ../development/tools/build-managers/bazel { jdk = oraclejdk8; };
+
   binutils = if stdenv.isDarwin
     then import ../build-support/native-darwin-cctools-wrapper {inherit stdenv;}
     else callPackage ../development/tools/misc/binutils {