contra-tracer: init at 0.2.0.0

manifest.dhall

@@ -129,6 +129,7 @@ in  [ callHackage "PyF" "0.11.0.0"
         "https://github.com/input-output-hk/cardano-prelude"
         (Some "b6053a23f53acd5c519cc559c3861dda3ebf8b35")
         (Some "cardano-prelude-test")
+    , callHackage "contra-tracer" "0.2.0.0"
     , callHackage "data-ordlist" "0.4.7.0"
     , callCabal2nix
         "flat"

overlay.nix

@@ -79,6 +79,8 @@ final: prev: with pkgs.haskell.lib; {
 
   cardano-strict-containers = prev.callPackage (./pkgs/cardano-strict-containers.nix) { };
 
+  contra-tracer = prev.callPackage (./pkgs/contra-tracer.nix) { };
+
   data-ordlist = prev.callPackage (./pkgs/data-ordlist.nix) { };
 
   flat = prev.callPackage (./pkgs/flat.nix) { };

pkgs/contra-tracer.nix

+{ mkDerivation, base, lib }:
+mkDerivation {
+  pname = "contra-tracer";
+  version = "0.2.0.0";
+  sha256 = "9eebc1e410b2e50a7da6418b9bf194e22c92f2c05b3724aec502d82ca87262e5";
+  isLibrary = true;
+  isExecutable = false;
+  enableSeparateDataOutput = false;
+  libraryHaskellDepends = [ base ];
+  enableLibraryProfiling = false;
+  enableExecutableProfiling = false;
+  doHaddock = false;
+  jailbreak = true;
+  doCheck = false;
+  doBenchmark = false;
+  hyperlinkSource = false;
+  description = "Arrow and contravariant tracers";
+  license = lib.licenses.asl20;
+  broken = false;
+}