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{ nixpkgs }:
with nixpkgs;
let
# provided by .envrc
root = builtins.getEnv "BIZ_ROOT";
# general functions to put in a lib
lines = s: lib.strings.splitString "\n" s;
removeNull = ls: builtins.filter (x: x != null) ls;
depsToPackageSet = packageSet: deps:
lib.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;
haskellDeps = import ./Deps/Haskell.nix;
# gather data needed for compiling by analyzing the main module
analyze = main: rec {
# path to the module relative to the git root
relpath = builtins.replaceStrings ["${root}/"] [""]
(builtins.toString main);
# Haskell-appropriate name of the module
module = builtins.replaceStrings ["/" ".hs"] ["." ""] relpath;
# file contents
content = builtins.readFile main;
# search for the ': out' declaration
out = builtins.head (lib.lists.flatten (removeNull
(map (builtins.match "^-- : out ([[:alnum:]._-]*)$")
(lines content))));
# collect all of the ': dep' declarations
deps = lib.lists.flatten (removeNull
(map (builtins.match "^-- : dep ([[:alnum:]._-]*)$")
(lines content)));
sysdeps = lib.lists.flatten (removeNull
(map (builtins.match "^-- : sys ([[:alnum:]._-]*)$")
(lines content)));
};
mkGhc = compiler: (deps: compiler (hp:
if (subset deps haskellDeps)
then depsToPackageSet hp deps
else throw ''
missing from nix/haskell-deps.nix:
${toString (lib.lists.subtractLists haskellDeps deps)}
''));
ghc_ = mkGhc pkgs.haskell.packages.ghc865.ghcWithHoogle;
ghcjs_ = mkGhc pkgs.haskell.packages.ghcjs86.ghcWithPackages;
in {
ghc = main:
let
data = analyze main;
ghc = ghc_ data.deps;
in stdenv.mkDerivation {
name = data.module;
src = ../../.;
nativeBuildInputs = [ ghc ] ++ depsToPackageSet nixpkgs data.sysdeps;
strictDeps = true;
buildPhase = ''
mkdir -p $out/bin
# compile with ghc
${ghc}/bin/ghc \
-Werror \
-i. \
--make ${main} \
-main-is ${data.module} \
-o $out/bin/${data.out}
'';
# the install process was handled above
installPhase = "exit 0";
} // { env = ghc; };
ghcjs = main:
let
data = analyze main;
ghcjs = ghcjs_ data.deps;
in stdenv.mkDerivation {
name = data.module;
src = ../../.;
nativeBuildInputs = [ ghcjs ];
strictDeps = true;
buildPhase = ''
mkdir -p $out/static
# compile with ghcjs
${ghcjs}/bin/ghcjs \
-Werror \
-i. \
--make ${main} \
-main-is ${data.module} \
-o ${data.out}
# optimize js output
${pkgs.closurecompiler}/bin/closure-compiler \
${data.out}/all.js > $out/static/${data.out}
'';
installPhase = "exit 0";
} // { env = ghcjs; };
env = mkShell {
name = "bizdev";
buildInputs = [
# haskell deps
(ghc_ haskellDeps)
# ghcjs doesn't need everything, and many things fail to build
(ghcjs_ [
"aeson"
"clay"
"containers"
"miso"
"protolude"
"servant"
"split"
"string-quote"
"text"
"ghcjs-base"
])
# scheme deps
nixpkgs.guile
nixpkgs.inspekt3d
nixpkgs.libfive
# python deps
(nixpkgs.python38.withPackages (p:
[ p.black p.pylint ]))
# tools
nixpkgs.cmark
nixpkgs.figlet
nixpkgs.hlint
nixpkgs.lolcat
nixpkgs.niv.niv
nixpkgs.nixops
nixpkgs.ormolu
nixpkgs.python37Packages.black
nixpkgs.python37Packages.pylint
nixpkgs.wemux
];
shellHook = ". ${./ShellHook.sh}";
};
os = cfg: (nixos (args: cfg)).toplevel;
}
|
