confluent-platform: add confluent-cli tool

pkgs/servers/confluent-platform/default.nix

@@ -1,20 +1,35 @@
-{ stdenv, lib, fetchurl, jre, makeWrapper, bash, gnused }:
+{ stdenv, lib, fetchurl, fetchFromGitHub
+, jre, makeWrapper, bash, gnused }:
 
-let 
-  scalaVersion = "2.12"; 
-in
 stdenv.mkDerivation rec {
   name = "confluent-platform-${version}";
   version = "5.3.0";
+  scalaVersion = "2.12";
 
   src = fetchurl {
     url = "http://packages.confluent.io/archive/${lib.versions.majorMinor version}/confluent-${version}-${scalaVersion}.tar.gz";
     sha256 = "14cilq63fib5yvj40504aj6wssi7xw4f7c2jadlzdmdxzh4ixqmp";
   };
 
+  confluentCli = fetchFromGitHub {
+    owner = "confluentinc";
+    repo = "confluent-cli";
+    rev = "v${version}";
+    sha256 = "18yvp56b8l074qfkgr4afirgd43g8b023n9ija6dnk6p6dib1f4j";
+  };
+
   buildInputs = [ jre makeWrapper bash ];
 
   installPhase = ''
+    cp -R $confluentCli confluent-cli
+    chmod -R +w confluent-cli
+
+    (
+      export CONFLUENT_HOME=$PWD
+      cd confluent-cli
+      make install
+    )
+
     mkdir -p $out
     cp -R bin etc share src $out
     rm -rf $out/bin/windows