haskell-te: d46070d8eb26807bd5d200df07743553fa24297b

     1: # Looks up info from the environment, returns a Haskell package set for nix-eval
     2: # to use during exploration
     3: with builtins;
     4: with rec {
     5:   support = import ./.. {};
     6:   hs      = if getEnv "HASKELL_PACKAGES" == ""
     7:                then support.haskellPackages
     8:                else import (getEnv "HASKELL_PACKAGES");
     9:   hsDirs  = fromJSON (getEnv "OUT_DIRS");
    10:   hsPkgs  = hs.override {
    11:     overrides = support.hsOverride (self: super: listToAttrs (map
    12:       (d: {
    13:         value = self.callPackage d {};
    14:         name  = support.pkgName (support.haskellPackages.callPackage d {}).name;
    15:       })
    16:       hsDirs));
    17:   };
    18: };
    19: 
    20: assert all (d: typeOf d == "path" || (isString d && substring 0 1 d == "/"))
    21:            hsDirs || abort "Value of 'OUT_DIRS' is '${toJSON hsDirs}'";
    22: hsPkgs