55 lines
2.1 KiB
Nix
55 lines
2.1 KiB
Nix
let
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pkgs = import <nixpkgs> {};
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unstable = import <unstable> {};
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sources = import ../nix/sources.nix;
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shh = unstable.haskell.lib.overrideCabal unstable.haskellPackages.shh (drv: {
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broken = false;
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doCheck = false;
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});
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haskellList = list: ''["${builtins.concatStringsSep ''", "'' list}"]'';
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writeHaskellScript = { name ? "haskell-script", bins ? [pkgs.coreutils], libraries ? [], imports ? []}: code:
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unstable.writers.writeHaskellBin name { libraries = libraries ++ [shh unstable.haskellPackages.string-interpolate ]; } ''
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{-# LANGUAGE DeriveDataTypeable #-}
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{-# LANGUAGE TemplateHaskell #-}
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{-# LANGUAGE QuasiQuotes #-}
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import Shh
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import Data.String.Interpolate (i)
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import qualified Data.ByteString as BS
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import qualified Data.ByteString.Lazy as LBS
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import qualified Data.ByteString.Lazy.Char8 as LBSC
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import qualified Data.Text as T
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import qualified Data.Text.Lazy as LT
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import qualified Data.Text.Encoding as TE
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import qualified Data.Text.Lazy.Encoding as LTE
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import System.Environment (getArgs)
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${builtins.concatStringsSep "\n" (map (x: "import ${x}") imports)}
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-- Load binaries from Nix packages. The dependencies will be captured
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-- in the closure.
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loadFromBins ${haskellList (builtins.map toString bins)}
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${code}
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'';
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get-niv-path = writeHaskellScript {
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name = "get-niv-path";
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bins = [pkgs.nix];
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imports = ["System.Console.CmdArgs.Implicit"];
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libraries = [ unstable.haskellPackages.cmdargs unstable.haskellPackages.text ];
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} ''
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trimQuotation = pureProc $ LTE.encodeUtf8 . LT.dropAround ('"' ==) . LTE.decodeUtf8 . trim
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main = do
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[sources, channel] <- getArgs
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let expr = [i|(import #{sources}).#{channel}|]
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nix_build ["-Q", "-E", expr, "--no-out-link"] &> devNull
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nix_instantiate ["--eval", "-E", [i|toString #{expr}|]] |> trimQuotation
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'';
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in {
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inherit writeHaskellScript get-niv-path unstable sources haskellList;
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niv = (import sources.niv {}).niv;
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home-manager = pkgs.callPackage <home-manager/home-manager> {};
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gcRetentionDays = 5;
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}
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