1 files changed, 89 insertions, 0 deletions
diff --git a/hadrian/shell.nix b/hadrian/shell.nix
new file mode 100644
index 0000000000..041bf092a2
--- /dev/null
+++ b/hadrian/shell.nix
@@ -0,0 +1,89 @@
+# Invoking nix-shell sets up an environment where we can build ghc
+# by only invoking hadrian.
+
+
+{ _nixpkgs ? import <nixpkgs> {} }:
+
+let
+
+  nixpkgs = import (_nixpkgs.fetchFromGitHub {
+    owner = "NixOS";
+    repo = "nixpkgs";
+    rev = "e7a327da5cffdf5e77e1924906a4f0983591bd3e";
+    sha256 = "1xzil4mayhggg2miwspbk12nihlszg0y4n6i4qacrxql5n75f0hr";
+  }){ overlays = [cabalHashes]; };
+
+
+
+  cabalHashes = sel: super: {
+    all-cabal-hashes = super.fetchurl {
+      url    = "https://github.com/commercialhaskell/all-cabal-hashes/archive/b2b93ae610f5f1b51d22b191f972dc3dec8f94c6.tar.gz";
+      sha256 = "0bffclpqbw62xff36qlzxghr042mhv0m06k5ml4298w6fv7ly1xw";
+    };
+  };
+
+  haskellPackages = nixpkgs.haskell.packages.ghc822;
+
+  removeBuild = path: type:
+    let baseName = baseNameOf (toString path);
+    in
+        ! (baseName == "_build"
+           || baseName == "dist"
+           || baseName == "dist-newstyle"
+           || baseName == ".stack-work"
+           || baseName == "config.log"
+           || baseName == "config.status"
+           || baseName == "shell.nix"
+           || nixpkgs.lib.hasSuffix ".sh" baseName
+           || !(nixpkgs.lib.cleanSourceFilter path type)) ;
+
+  filterSrc = path: builtins.filterSource removeBuild path;
+
+
+  hadrianPackages = nixpkgs.haskell.packages.ghc822.override {
+    overrides = self: super: let
+        localPackage = name: path: self.callCabal2nix name (filterSrc path) {};
+      in {
+        hadrian = localPackage "hadrian" ./. ;
+        happy = nixpkgs.haskell.lib.dontCheck (super.happy);
+        shake = self.callHackage "shake" "0.16.2" {};
+        extra = self.callHackage "extra" "1.6.4" {};
+        QuickCheck = self.callHackage "QuickCheck" "2.10" {};
+        Cabal = localPackage "Cabal" ./../libraries/Cabal/Cabal ;
+        filepath = localPackage "filepath" ./../libraries/filepath ;
+        text = localPackage "text" ./../libraries/text  ;
+        hpc = localPackage"hpc" ./../libraries/hpc ;
+        parsec = localPackage "parsec" ./../libraries/parsec ;
+        HUnit = nixpkgs.haskell.lib.dontCheck (self.callHackage "HUnit" "1.3.1.2" {});
+        process = localPackage "process" ./../libraries/process ;
+        directory = localPackage "directory" ./../libraries/directory ;
+      }; };
+
+  cabalPackages = nixpkgs.haskell.packages.ghc822.override {
+    overrides = self: super: let
+        localPackage = name: path: self.callCabal2nix name (filterSrc path) {};
+      in {
+        Cabal = localPackage "Cabal" ./../../cabal/Cabal ;
+        cabal-install = self.callPackage ./../../cabal/cabal-install.nix {};
+      }; };
+
+
+in
+  nixpkgs.lib.overrideDerivation nixpkgs.haskell.packages.ghcHEAD.ghc
+    (drv: {
+      name = "ghc-dev";
+      nativeBuildInputs = drv.nativeBuildInputs ++
+        [ hadrianPackages.hadrian
+          nixpkgs.arcanist
+          nixpkgs.git
+          nixpkgs.gmp.dev nixpkgs.gmp.out
+          nixpkgs.ncurses.dev nixpkgs.ncurses.out
+          nixpkgs.python3Packages.sphinx
+          nixpkgs.texlive.combined.scheme-basic
+          (nixpkgs.haskell.packages.ghc822.ghcWithPackages
+            (ps: [ps.html ps.regex-compat ps.dump-core]))
+
+          #cabalPackages.cabal-install
+        ];
+    })
+