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|
{ nixpkgs }:
with nixpkgs;
with nixpkgs.lib;
let
# provided by .envrc
root = builtins.getEnv "BIZ_ROOT";
# general functions to put in a lib
lines = s: strings.splitString "\n" s;
removeNull = ls: builtins.filter (x: x != null) ls;
depsToPackageSet = packageSet: deps:
attrsets.attrVals deps packageSet;
# returns true if a is a subset of b, where a and b are attrsets
subset = a: b: builtins.all
(x: builtins.elem x b) a;
allDeps = import ./deps.nix;
in {
buildGhc = main:
let
relpath = builtins.replaceStrings ["${root}/"] [""] (builtins.toString main);
module = builtins.replaceStrings ["/" ".hs"] ["." ""] relpath;
content = builtins.readFile main;
exe = builtins.head (lists.flatten (removeNull
(map (builtins.match "^-- : exe ([[:alnum:]._-]*)$")
(lines content))));
deps = lists.flatten (removeNull
(map (builtins.match "^-- : dep ([[:alnum:]._-]*)$")
(lines content)));
ghc = pkgs.haskell.packages.ghc865.ghcWithHoogle (hp:
if (subset deps allDeps)
then depsToPackageSet hp deps
else throw ("missing from deps.nix: ${toString (lib.lists.subtractLists allDeps deps)}")
);
in stdenv.mkDerivation {
name = module;
version = "0";
src = ./.;
nativeBuildInputs = [ ghc ];
strictDeps = true;
buildPhase = ''
mkdir -p $out/{bin,static} ${baseNameOf relpath}
# compile with ghc
${ghc}/bin/ghc -Werror -i. \
--make ${main} \
-main-is ${module} \
-o $out/bin/${exe}
'';
# the install process was handled above
installPhase = "exit 0";
} // { env = ghc; };
buildGhcjs = main:
let
relpath = builtins.replaceStrings ["${root}/"] [""] (builtins.toString main);
module = builtins.replaceStrings ["/" ".hs"] ["." ""] relpath;
content = builtins.readFile main;
exe = builtins.head (lists.flatten (seq
(map (builtins.match "^-- : exe ([[:alnum:]._-]*)$")
(lines content))));
deps = lists.flatten (seq
(map (builtins.match "^-- : dep ([[:alnum:]._-]*)$")
(lines content)));
ghcjs = ghcjs_.ghcWithPackages (hp: depsToPackageSet hp deps);
in stdenv.mkDerivation {
name = module;
version = "0";
src = ./.;
nativeBuildInputs = [ ghcjs ];
strictDeps = true;
buildPhase = ''
mkdir -p $out/{bin,static} ${baseNameOf relpath}
# compile with ghcjs
${ghcjs}/bin/ghcjs -Werror -i. \
--make ${main} \
-main-is ${module} \
-o ${exe}
# optimize js output
${pkgs.closurecompiler}/bin/closure-compiler \
${exe}.jsexe/all.js > $out/static/${exe}
'';
installPhase = "exit 0";
} // { env = ghcjs; };
globalGhc = pkgs.haskell.packages.ghc865.ghcWithHoogle (hp: depsToPackageSet hp allDeps);
}
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