adoptopenjdk-bin: support darwin platform

pkgs/development/compilers/adoptopenjdk-bin/jdk-darwin-base.nix

@@ -0,0 +1,59 @@
+{ name
+, url
+, sha256
+}:
+
+{ swingSupport ? true # not used for now
+, stdenv
+, fetchurl
+}:
+
+let result = stdenv.mkDerivation rec {
+  inherit name;
+
+  src = fetchurl {
+    inherit url sha256;
+  };
+
+  # See: https://github.com/NixOS/patchelf/issues/10
+  dontStrip = 1;
+
+  installPhase = ''
+    cd ..
+
+    mv $sourceRoot $out
+
+    rm -rf $out/Home/demo
+
+    # Remove some broken manpages.
+    rm -rf $out/Home/man/ja*
+
+    # for backward compatibility
+    ln -s $out/Contents/Home $out/jre
+
+    ln -s $out/Contents/Home/* $out/
+
+    mkdir -p $out/nix-support
+
+    # Set JAVA_HOME automatically.
+    cat <<EOF >> $out/nix-support/setup-hook
+    if [ -z "\$JAVA_HOME" ]; then export JAVA_HOME=$out; fi
+    EOF
+  '';
+
+  # FIXME: use multiple outputs or return actual JRE package
+  passthru.jre = result;
+
+  passthru.home = result;
+
+  # for backward compatibility
+  passthru.architecture = "";
+
+  meta = with stdenv.lib; {
+    license = licenses.gpl2Classpath;
+    description = "AdoptOpenJDK, prebuilt OpenJDK binary";
+    platforms = [ "x86_64-darwin" ]; # some inherit jre.meta.platforms
+    maintainers = with stdenv.lib.maintainers; [ taku0 ];
+  };
+
+}; in result