use & support recent hnix-store master == 0.4

M  default.nix
M  hnix.cabal
M  src/Nix/Effects/Derivation.hs

default.nix: fx overlay call

default.nix

@@ -91,7 +91,7 @@
 #   , nixos-20.03  # Last stable release, gets almost no updates to recipes, gets only required backports
 #   ...
 #   }
-, rev ? "24eb3f87fc610f18de7076aee7c5a84ac5591e3e"
+, rev ? "8ba15f6383c74e981d8038fa19cc77ed0c53ba22"
 
 , pkgs ?
     if builtins.compareVersions builtins.nixVersion "2.0" < 0
@@ -125,16 +125,16 @@ let
      then getDefaultGHC
      else compiler;
 
-  #  2020-05-23: NOTE: Currently HNix-store needs no overlay
-  # hnix-store-src = pkgs.fetchFromGitHub {
-  #   owner = "haskell-nix";
-  #   repo = "hnix-store";
-  #   rev = "0.2.0.0";
-  #   sha256 = "1qf5rn43d46vgqqgmwqdkjh78rfg6bcp4kypq3z7mx46sdpzvb78";
-  # };
+  #  2020-12-31: NOTE: Remove after `hnix-store 0.4` arrives into Nixpkgs
+  hnix-store-src = pkgs.fetchFromGitHub {
+    owner = "haskell-nix";
+    repo = "hnix-store";
+    rev = "fd09d29b8bef4904058f033d693e7d928a4a92dc";
+    sha256 = "0fxig1ckzknm5g19jzg7rrcpz7ssn4iiv9bs9hff9gfy3ciq4zrs";
+  };
 
   overlay = pkgs.lib.foldr pkgs.lib.composeExtensions (_: _: {}) [
-    # (import "${hnix-store-src}/overlay.nix")
+    (import "${hnix-store-src}/overlay.nix" pkgs pkgs.haskell.lib)
     (self: super:
       pkgs.lib.optionalAttrs withHoogle {
       ghc = super.ghc // { withPackages = super.ghc.withHoogle; };
@@ -223,6 +223,17 @@ let
     root = packageRoot;
 
     overrides = self: super: {
+      # 2020-12-07 We really want cryptohash-sha512, but it conflicts with
+      # recent versions of base, for seemingly no valid reason.
+      # As the update is slow to happen, just jailbreak here
+      # See https://github.com/haskell-hvr/cryptohash-sha512/pull/3
+      # and https://github.com/haskell-hvr/cryptohash-sha512/pull/5
+      cryptohash-sha512 = pkgs.haskell.lib.unmarkBroken ( pkgs.haskell.lib.doJailbreak super.cryptohash-sha512 );
+
+      # 2020-12-07 hnix-store-remote fails when trying to connect to a real hnix daemon.
+      # probably due to nix sandbox restrictions.
+      hnix-store-remote = pkgs.haskell.lib.dontCheck super.hnix-store-remote;
+
       # 2020-08-04 hnix uses custom LayoutOptions and therefore is
       # likely to be affected by the change in the ribbon width
       # calculation in prettyprinter-1.7.0.

hnix.cabal

@@ -402,8 +402,8 @@ library
     , gitrev >= 1.1.0 && < 1.4
     , hashable >= 1.2.5 && < 1.4
     , hashing >= 0.1.0 && < 0.2
-    , hnix-store-core >= 0.3.0 && < 0.4
-    , hnix-store-remote >= 0.2.0 && < 0.3
+    , hnix-store-core >= 0.4.0 && < 0.5
+    , hnix-store-remote >= 0.4.0 && < 0.5
     , http-client >= 0.5.14 && < 0.6 || >= 0.6.4 && < 0.7
     , http-client-tls >= 0.3.5 && < 0.4
     , http-types >= 0.12.2 && < 0.13

src/Nix/Effects/Derivation.hs

@@ -112,7 +112,7 @@ hashDerivationModulo (Derivation {
       $  "fixed:out"
       <> (if hashMode == Recursive then ":r" else "")
       <> ":" <> (Store.algoName @hashType)
-      <> ":" <> (Store.encodeBase16 digest)
+      <> ":" <> (Store.encodeInBase Store.Base16 digest)
       <> ":" <> path
     outputsList -> throwError $ ErrorCall $ "This is weird. A fixed output drv should only have one output named 'out'. Got " ++ show outputsList
 hashDerivationModulo drv@(Derivation {inputs = (inputSrcs, inputDrvs)}) = do
@@ -122,7 +122,7 @@ hashDerivationModulo drv@(Derivation {inputs = (inputSrcs, inputDrvs)}) = do
       Just hash -> return (hash, outs)
       Nothing -> do
         drv' <- readDerivation $ Text.unpack path
-        hash <- Store.encodeBase16 <$> hashDerivationModulo drv'
+        hash <- Store.encodeInBase Store.Base16 <$> hashDerivationModulo drv'
         return (hash, outs)
     )
   return $ Store.hash @'Store.SHA256 $ Text.encodeUtf8 $ unparseDrv (drv {inputs = (inputSrcs, inputsModulo)})
@@ -135,7 +135,7 @@ unparseDrv (Derivation {..}) = Text.append "Derive" $ parens
         case mFixed of
           Nothing -> parens [s outputName, s outputPath, s "", s ""]
           Just (Store.SomeDigest (digest :: Store.Digest hashType)) ->
-            parens [s outputName, s outputPath, s $ prefix <> Store.algoName @hashType, s $ Store.encodeBase16 digest]
+            parens [s outputName, s outputPath, s $ prefix <> Store.algoName @hashType, s $ Store.encodeInBase Store.Base16 digest]
         )
     , -- inputDrvs
       list $ flip map (Map.toList $ snd inputs) (\(path, outs) ->
@@ -257,7 +257,7 @@ defaultDerivationStrict = fromValue @(AttrSet (NValue t f m)) >=> \s -> do
     drvPath <- pathToText <$> writeDerivation drv'
 
     -- Memoize here, as it may be our last chance in case of readonly stores.
-    drvHash <- Store.encodeBase16 <$> hashDerivationModulo drv'
+    drvHash <- Store.encodeInBase Store.Base16 <$> hashDerivationModulo drv'
     modify (\(a, b) -> (a, MS.insert drvPath drvHash b))
 
     let outputsWithContext = Map.mapWithKey (\out path -> principledMakeNixStringWithSingletonContext path (StringContext drvPath (DerivationOutput out))) (outputs drv')