Add haskell-accumulator (#1148)

* Added haskell-accumulator-1.0.0.0

From https://github.com/cardano-scaling/haskell-accumulator at bb606b4b17dafd90d6fae79a761c2b781d7b904c

* Add hydra team to codeowners

Author: vrom911

CODEOWNERS

@@ -136,6 +136,7 @@ _sources/quickcheck-contractmodel @input-output-hk/plutus-tools
 
 # hydra
 _sources/hydra-* @input-output-hk/hydra-engineering
+_sources/haskell-accumulator @cardano-scaling/team-hydra
 
 # performance-tracing
 _sources/cardano-topology               @input-output-hk/performance-tracing

_sources/haskell-accumulator/1.0.0.0/meta.toml

@@ -0,0 +1,3 @@
+timestamp = 2025-10-17T15:10:00Z
+github = { repo = "cardano-scaling/haskell-accumulator", rev = "bb606b4b17dafd90d6fae79a761c2b781d7b904c" }
+subdir = 'haskell-accumulator'

flake.lock

@@ -32,9 +32,15 @@
       url = "github:input-output-hk/iohk-nix";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+
+    # Required by haskell-accumulator
+    rust-accumulator = {
+      url = "github:cardano-scaling/rust-accumulator";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
-  outputs = { self, nixpkgs, flake-utils, foliage, haskell-nix, CHaP, iohk-nix, ... }:
+  outputs = { self, nixpkgs, flake-utils, foliage, haskell-nix, CHaP, iohk-nix, rust-accumulator, ... }:
     let
       inherit (nixpkgs) lib;
       inherit (import ./nix/chap-meta.nix { inherit lib CHaP; }) chap-package-latest-versions chap-package-versions mkPackageTreeWith;
@@ -263,6 +269,17 @@
               iohk-nix.overlays.crypto
               haskell-nix.overlay
               iohk-nix.overlays.haskell-nix-crypto
+
+              # Required by haskell-accumulator
+              (final: prev: {
+                librust_accumulator = rust-accumulator.defaultPackage.${final.system};
+                haskell-nix = prev.haskell-nix // {
+                  extraPkgconfigMappings = prev.haskell-nix.extraPkgconfigMappings or { } // {
+                    "librust_accumulator" = [ "librust_accumulator" ];
+                  };
+                };
+              })
+
             ];
           };
 

flake.nix

@@ -48,6 +48,7 @@ let
           echo "doc haddock $docdir/html" >> $doc/nix-support/hydra-build-products
         '';
       }];
+
     }
     (extraConfig compiler-nix-name)
   ];