release-8.6: init

release-8.6.nix

+let
+  fetcher = { owner, repo, rev, sha256 }: builtins.fetchTarball {
+    inherit sha256;
+    url = "https://github.com/${owner}/${repo}/archive/${rev}.tar.gz";
+  };
+  head-hackage = fetcher {
+    owner = "mpickering";
+    repo = "head.hackage";
+    rev = "d26e4c7ad9e2bd6419338c644b1393f41109a9fa";
+    sha256 = "0vr2pl7yhfjik8q5ayak97xkkdr2d5anjl1s5p60nhg83r034pfc";
+  };
+in
+{ compiler ? "ghc861"
+, nixpkgs ? import head-hackage {}
+, packages ? (_: [])
+, pythonPackages ? (_: [])
+, rtsopts ? "-M3g -N2"
+, systemPackages ? (_: [])
+}:
+
+let
+  inherit (builtins) any elem filterSource listToAttrs;
+  lib = nixpkgs.lib;
+  cleanSource = name: type: let
+    baseName = baseNameOf (toString name);
+  in lib.cleanSourceFilter name type && !(
+    (type == "directory" && (elem baseName [ ".stack-work" "dist"])) ||
+    any (lib.flip lib.hasSuffix baseName) [ ".hi" ".ipynb" ".nix" ".sock" ".yaml" ".yml" ]
+  );
+  ihaskellSourceFilter = src: name: type: let
+    relPath = lib.removePrefix (toString src + "/") (toString name);
+  in cleanSource name type && ( any (lib.flip lib.hasPrefix relPath) [
+    "src" "main" "html" "Setup.hs" "ihaskell.cabal" "LICENSE"
+  ]);
+  ihaskell-src         = filterSource (ihaskellSourceFilter ./.) ./.;
+  ipython-kernel-src   = filterSource cleanSource ./ipython-kernel;
+  ghc-parser-src       = filterSource cleanSource ./ghc-parser;
+  ihaskell-display-src = filterSource cleanSource ./ihaskell-display;
+  th-lift-src = fetcher {
+    owner = "mboes";
+    repo = "th-lift";
+    rev = "8969cfb5f670d09d7d18b1e55325ada82c300ddd";
+    sha256 = "1cd55zh6iagc040w65yppcg9d9sxhxy4jn9qhd2l56wc422ywcb2";
+  };
+  displays = self: listToAttrs (
+    map
+      (display: { name = display; value = self.callCabal2nix display "${ihaskell-display-src}/${display}" {}; })
+      [
+        "ihaskell-aeson"
+        "ihaskell-blaze"
+        "ihaskell-charts"
+        "ihaskell-diagrams"
+        "ihaskell-gnuplot"
+        "ihaskell-hatex"
+        "ihaskell-juicypixels"
+        "ihaskell-magic"
+        "ihaskell-plot"
+        "ihaskell-rlangqq"
+        "ihaskell-static-canvas"
+        "ihaskell-widgets"
+      ]);
+  haskellPackages = nixpkgs.haskellPackages.extend (self: super: {
+    ihaskell          = nixpkgs.haskell.lib.overrideCabal (
+                        self.callCabal2nix "ihaskell" ihaskell-src {}) (_drv: {
+      preCheck = ''
+        export HOME=$(${nixpkgs.pkgs.coreutils}/bin/mktemp -d)
+        export PATH=$PWD/dist/build/ihaskell:$PATH
+        export GHC_PACKAGE_PATH=$PWD/dist/package.conf.inplace/:$GHC_PACKAGE_PATH
+      '';
+      doCheck = true;
+      configureFlags = (_drv.configureFlags or []) ++ [
+        # otherwise the tests are agonisingly slow and the kernel times out
+        "--enable-executable-dynamic"
+      ];
+    });
+    ghc-parser        = self.callCabal2nix "ghc-parser" ghc-parser-src {};
+    ipython-kernel    = self.callCabal2nix "ipython-kernel" ipython-kernel-src {};
+    th-lift           = super.callCabal2nix "th-lift" th-lift-src {};
+  } // displays self);
+  ihaskellEnv = haskellPackages.ghcWithPackages (self: [ self.ihaskell ] ++ packages self);
+  jupyter = nixpkgs.python3.withPackages (ps: [ ps.notebook ] ++ pythonPackages ps);
+  ihaskellSh = cmd: extraArgs: nixpkgs.writeScriptBin "ihaskell-${cmd}" ''
+    #! ${nixpkgs.stdenv.shell}
+    export GHC_PACKAGE_PATH="$(echo ${ihaskellEnv}/lib/*/package.conf.d| tr ' ' ':'):$GHC_PACKAGE_PATH"
+    export PATH="${nixpkgs.stdenv.lib.makeBinPath ([ ihaskellEnv jupyter ] ++ systemPackages nixpkgs)}:$PATH"
+    ${ihaskellEnv}/bin/ihaskell install -l $(${ihaskellEnv}/bin/ghc --print-libdir) --use-rtsopts="${rtsopts}" && ${jupyter}/bin/jupyter ${cmd} ${extraArgs} "$@"
+  '';
+in
+nixpkgs.buildEnv {
+  name = "ihaskell-with-packages";
+  buildInputs = [ nixpkgs.makeWrapper ];
+  paths = [ ihaskellEnv jupyter ];
+  postBuild = ''
+    ln -s ${ihaskellSh "notebook" ""}/bin/ihaskell-notebook $out/bin/
+    ln -s ${ihaskellSh "nbconvert" ""}/bin/ihaskell-nbconvert $out/bin/
+    ln -s ${ihaskellSh "console" "--kernel=haskell"}/bin/ihaskell-console $out/bin/
+    for prg in $out/bin"/"*;do
+      if [[ -f $prg && -x $prg ]]; then
+        wrapProgram $prg --set PYTHONPATH "$(echo ${jupyter}/lib/*/site-packages)"
+      fi
+    done
+  '';
+}