base58

Pure Haskell base58, base58check encoding/decoding (docs.ppad.tech/base58).
git clone git://git.ppad.tech/base58.git
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flake.nix (1647B)

      1 {
      2   description = "Pure Haskell base58 and base58check encodings.";
      3 
      4   inputs = {
      5     ppad-sha256 = {
      6       type = "git";
      7       url  = "git://git.ppad.tech/sha256.git";
      8       ref  = "master";
      9     };
     10     flake-utils.follows = "ppad-sha256/flake-utils";
     11     nixpkgs.follows = "ppad-sha256/nixpkgs";
     12   };
     13 
     14   outputs = { self, nixpkgs, flake-utils, ppad-sha256 }:
     15     flake-utils.lib.eachDefaultSystem (system:
     16       let
     17         lib = "ppad-base58";
     18 
     19         pkgs = import nixpkgs { inherit system; };
     20         hlib = pkgs.haskell.lib;
     21 
     22         sha256 = ppad-sha256.packages.${system}.default;
     23 
     24         hpkgs = pkgs.haskell.packages.ghc981.extend (new: old: {
     25           ppad-sha256 = sha256;
     26           ${lib} = new.callCabal2nixWithOptions lib ./. "--enable-profiling" {
     27             ppad-sha256 = new.ppad-sha256;
     28           };
     29         });
     30 
     31         cc    = pkgs.stdenv.cc;
     32         ghc   = hpkgs.ghc;
     33         cabal = hpkgs.cabal-install;
     34       in
     35         {
     36           packages.default = hpkgs.${lib};
     37 
     38           devShells.default = hpkgs.shellFor {
     39             packages = p: [
     40               (hlib.doBenchmark p.${lib})
     41             ];
     42 
     43             buildInputs = [
     44               cabal
     45               cc
     46             ];
     47 
     48             inputsFrom = builtins.attrValues self.packages.${system};
     49 
     50             doBenchmark = true;
     51 
     52             shellHook = ''
     53               PS1="[${lib}] \w$ "
     54               echo "entering ${system} shell, using"
     55               echo "cc:    $(${cc}/bin/cc --version)"
     56               echo "ghc:   $(${ghc}/bin/ghc --version)"
     57               echo "cabal: $(${cabal}/bin/cabal --version)"
     58             '';
     59           };
     60         }
     61       );
     62 }
     63