Idris2/package.nix
2021-03-09 18:27:05 +00:00

67 lines
2.4 KiB
Nix

{ stdenv
, chez
, clang
, fetchFromGitHub
, makeWrapper
}:
# Uses scheme to bootstrap the build of idris2
stdenv.mkDerivation rec {
pname = "idris2";
version = "0.3.0";
src = ./.;
strictDeps = true;
nativeBuildInputs = [ makeWrapper clang chez ];
buildInputs = [ chez ];
prePatch = ''
patchShebangs --build tests
'';
makeFlags = [ "PREFIX=$(out)" ]
++ stdenv.lib.optional stdenv.isDarwin "OS=";
# The name of the main executable of pkgs.chez is `scheme`
buildFlags = [ "bootstrap" "SCHEME=scheme" ];
checkTarget = "test";
# TODO: Move this into its own derivation, such that this can be changed
# without having to recompile idris2 every time.
postInstall = let
includedLibs = [ "base" "contrib" "network" "prelude" "test" ];
name = "${pname}-${version}";
packagePaths = builtins.map (l: "$out/${name}/${l}-${version}") includedLibs;
additionalIdris2Paths = builtins.concatStringsSep ":" packagePaths;
in ''
# Remove existing idris2 wrapper that sets incorrect LD_LIBRARY_PATH
rm $out/bin/idris2
# Move actual idris2 binary
mv $out/bin/idris2_app/idris2.so $out/bin/idris2
# After moving the binary, there is nothing left in idris2_app that isn't
# either contained in lib/ or is useless to us.
rm $out/bin/idris2_app/*
rmdir $out/bin/idris2_app
# idris2 needs to find scheme at runtime to compile
# idris2 installs packages with --install into the path given by PREFIX.
# Since PREFIX is in nix-store, it is immutable so --install does not work.
# If the user redefines PREFIX to be able to install packages, idris2 will
# not find the libraries and packages since all paths are relative to
# PREFIX by default.
# We explicitly make all paths to point to nix-store, such that they are
# independent of what IDRIS2_PREFIX is. This allows the user to redefine
# IDRIS2_PREFIX and use --install as expected.
# TODO: Make support libraries their own derivation such that
# overriding LD_LIBRARY_PATH is unnecessary
# TODO: Maybe set IDRIS2_PREFIX to the users home directory
wrapProgram "$out/bin/idris2" \
--set-default CHEZ "${chez}/bin/scheme" \
--suffix IDRIS2_LIBS ':' "$out/${name}/lib" \
--suffix IDRIS2_DATA ':' "$out/${name}/support" \
--suffix IDRIS2_PATH ':' "${additionalIdris2Paths}" \
--suffix LD_LIBRARY_PATH ':' "$out/${name}/lib"
'';
}