1 files changed, 167 insertions, 0 deletions
diff --git a/Biz/Bild.nix b/Biz/Bild.nix
new file mode 100644
index 0000000..44c500a
--- /dev/null
+++ b/Biz/Bild.nix
@@ -0,0 +1,167 @@
+{ nixpkgs ? import ./Bild/Nixpkgs.nix }:
+
+with nixpkgs;
+
+let
+  ghcCompiler = "ghc865";
+  ghcjsCompiler = "ghcjs86";
+
+  # provided by .envrc
+  root = builtins.getEnv "BIZ_ROOT";
+
+  # general functions to put in a lib
+  lines = s: lib.pipe s [
+    (builtins.split "\n")
+    (builtins.filter (x: builtins.typeOf x == "string"))
+  ];
+  removeNull = ls: builtins.filter (x: x != null) ls;
+
+  selectAttrs = deps: packageSet:
+    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 = hpkgs: import ./Bild/Deps/Haskell.nix hpkgs;
+
+  mkGhcPackageSet = pkgs.haskell.packages.${ghcCompiler}.ghcWithHoogle;
+  mkGhcjsPackageSet = pkgs.haskell.packages.${ghcjsCompiler}.ghcWithPackages;
+
+in rec {
+  # 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 ["${root}/"] [""]
+        (builtins.toString main);
+    # Haskell-appropriate name of the module
+    module = builtins.replaceStrings ["/" ".hs"] ["." ""] relpath;
+    # file contents
+    content = builtins.readFile main;
+    # search for the ': out' declaration
+    out = lib.pipe content [
+      lines
+      (map (builtins.match "^-- : out ([[:alnum:]._-]*)$"))
+      removeNull
+      lib.lists.flatten
+      builtins.head
+    ];
+    # collect all of the ': dep' declarations
+    deps = lib.pipe content [
+      lines
+      (map (builtins.match "^-- : dep ([[:alnum:]._-]*)$"))
+      removeNull
+      lib.lists.flatten
+    ];
+    # collect ': sys' declarations
+    sysdeps = lib.pipe content [
+      lines
+      (map (builtins.match "^-- : sys ([[:alnum:]._-]*)$"))
+      removeNull
+      lib.lists.flatten
+    ];
+  };
+
+  ghcPackageSetFull = mkGhcPackageSet haskellDeps;
+
+  ghc = main:
+    let
+      data = analyze main;
+      ghc = mkGhcPackageSet (hp: selectAttrs data.deps hp);
+    in stdenv.mkDerivation {
+      name = data.module;
+      src = ../.;
+      nativeBuildInputs = [ ghc ] ++ selectAttrs data.sysdeps nixpkgs;
+      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 = mkGhcjsPackageSet (hp: selectAttrs data.deps hp);
+    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
+      (mkGhcPackageSet haskellDeps)
+      # ghcjs doesn't need everything, and many things fail to build
+      (mkGhcjsPackageSet (hp: with hp; [
+        aeson
+        clay
+        containers
+        miso
+        protolude
+        servant
+        split
+        string-quote
+        text
+        ghcjs-base
+      ]))
+
+      # python deps
+      (nixpkgs.python38.withPackages (p:
+        [ p.black p.pylint ]))
+
+      # tools
+      nixpkgs.haskell.packages.${ghcCompiler}.apply-refact
+      nixpkgs.cmark
+      nixpkgs.figlet
+      nixpkgs.haskell.packages.${ghcCompiler}.fast-tags
+      nixpkgs.hlint
+      nixpkgs.lolcat
+      nixpkgs.niv.niv
+      nixpkgs.nixops
+      nixpkgs.ormolu
+      nixpkgs.python37Packages.black
+      nixpkgs.python37Packages.pylint
+      nixpkgs.shellcheck
+      nixpkgs.wemux
+      nixpkgs.gmnisrv
+      nixpkgs.gmni
+      (pkgs.writeScriptBin "ftags" (builtins.readFile ./Ide/ftags.sh))
+    ] ++ lib.optional nixpkgs.stdenv.isLinux [
+      # scheme deps (i think these are broken on macOS)
+      nixpkgs.guile
+      nixpkgs.inspekt3d
+      nixpkgs.libfive
+
+      nixpkgs.ccze
+    ];
+    shellHook = ". ${./Bild/ShellHook.sh}";
+  };
+
+  os = cfg: (nixos (args: cfg)).toplevel;
+}