[HaskellNG] Go back to forcing locale

[Fuuzetsu]

We used to force locale to UTF-8 for Haskell builds but now that we use mkDerivation, we're back to POSIX. It'd be nice to bring back the locale we're all used to considering unicode is quite prominent in Haskell community.

[peti]

Huh? What makes you think that Haskell builds don't run in an UTF-8 environment?

$ nix-shell '<nixpkgs>' -A haskell-ng.packages.ghc784.mtl --command 'declare -p LANG'
declare -x LANG="en_US.UTF-8"

[Fuuzetsu]

[shana@lenalee:~/programming/haddock]$ NIX_PATH='nixpkgs=/home/shana/programming/nixpkgs' nix-shell --pure

[nix-shell:~/programming/haddock]$ cat shell.nix  
with (import <nixpkgs> {}).pkgs;
let pkg = myHaskellngPackages_7101.callPackage
            ({ mkDerivation, base, Cabal, directory, filepath, haddock-api
             , process, stdenv, glibcLocales
             }:
             mkDerivation {
               pname = "haddock";
               version = "2.16.0";
               src = /home/shana/programming/haddock;
               isLibrary = false;
               isExecutable = true;
               buildDepends = [ base haddock-api glibcLocales ];
               testDepends = [ base Cabal directory filepath process ];
               preCheck = "unset GHC_PACKAGE_PATH";
               homepage = "http://www.haskell.org/haddock/";
               description = "A documentation-generation tool for Haskell libraries";
               license = stdenv.lib.licenses.bsd3;
             }) {};
in
  pkg.env

[nix-shell:~/programming/haddock]$ locale                                                                                                                                                                                                                                       
LANG=
LC_CTYPE="POSIX"
LC_NUMERIC="POSIX"
LC_TIME="POSIX"
LC_COLLATE="POSIX"
LC_MONETARY="POSIX"
LC_MESSAGES="POSIX"
LC_PAPER="POSIX"
LC_NAME="POSIX"
LC_ADDRESS="POSIX"
LC_TELEPHONE="POSIX"
LC_MEASUREMENT="POSIX"
LC_IDENTIFICATION="POSIX"
LC_ALL=

[peti]

Ah, you are right! We set the env variables in the build process, but not in the interactive shell. Thanks!