Got static compilation working again

.gitignore

@@ -9,3 +9,5 @@
 /tmp
 /template/testing.kbd
 .stack-work
+/bin/
+result

doc/installation.md

@@ -32,12 +32,6 @@ because you installed it yourself or because you are using NixOS, you can build
 nix-build nix
 ```
 
-Currently the process ends with an error, however only after the compilation and
-documentation-generation have been completed. If you look through output of
-`nix` you will see the paths it mentions and can find both the binary and the
-documentation. Perhaps someone more well-versed with `nix` can help me fix this
-issue.
-
 Another option with `nix` is to use the `nix-shell` to ensure you have the
 correct environment to run `stack` in. You can enter the development environment
 using:
@@ -50,6 +44,16 @@ nix-shell nix/shell.nix
 Note: we do also have to compile a little bit of C-code, so make sure `gcc` is
 installed as well.
 
+### Static compilation
+Every now and then we compile and release a static binary for Linux that should
+run on any Linux regardless of the installed libraries (i.e. `ldd` returns `not a
+dynamic executable`). If, for some reason, you want to compile a static binary for the state of HEAD yourself, please copy the contents of `./nix/static` into the `kmonad` project root, and then call:
+
+```shell
+$(nix-build --no-link -A fullBuildScript)
+```
+
+
 ### Windows environment
 
 FIXME: Windows support only for version 0.3.0 and lower. This will be fixed in

nix/default.nix

@@ -1,4 +1,5 @@
 let
-  config = import ./config.nix;
-  pkgs   = import (import ./pinned-nixpkgs.nix) { inherit config; };
-in with pkgs.haskellPackages; callPackage kmonad { doHaddock=false;}
+  # config = import ./config.nix;
+  pkgs   = import (import ./pinned-nixpkgs.nix) {};
+  kmonad = import ./kmonad.nix;
+in with pkgs.haskellPackages; callPackage kmonad {}

nix/kmonad.nix

@@ -0,0 +1,19 @@
+{ mkDerivation, base, cereal, lens, megaparsec, mtl
+, optparse-applicative, resourcet, rio, stdenv, time, unix
+, unliftio
+}:
+mkDerivation {
+  pname = "kmonad";
+  version = "0.4";
+  src = ./..;
+  isLibrary = true;
+  isExecutable = true;
+  libraryHaskellDepends = [
+    base cereal lens megaparsec mtl optparse-applicative resourcet rio
+    time unix unliftio
+  ];
+  executableHaskellDepends = [ base ];
+  doHaddock = false;
+  description = "Advanced keyboard remapping utility";
+  license = stdenv.lib.licenses.mit;
+}

nix/static-compilation.nix

@@ -25,7 +25,7 @@ let
   # Point the script at pwd, using a recent stackage snapshot
   stack2nix-script = import "${static-haskell-nix}/static-stack2nix-builder/stack2nix-script.nix" {
     inherit pkgs;
-    stack-project-dir = toString ./.;
+    stack-project-dir = toString ./..;
     hackageSnapshot   = "2020-05-24T00:00:00Z";
   };
 

nix/static/default.nix

@@ -0,0 +1,54 @@
+# Running using: $(nix-build --no-link -A fullBuildScript)
+{
+  stack2nix-output-path ? "custom-stack2nix-output.nix",
+  nixpkgs               ? import <nixpkgs> {},
+}:
+
+let
+
+  # Define basic configuration
+  cabalPackageName = "kmonad";
+  compiler         = "ghc865";
+
+  # Grab the most recent version of `static-haskell-nix` (at time of writing)
+  static-haskell-nix = nixpkgs.fetchFromGitHub
+    { owner  = "nh2";
+      repo   = "static-haskell-nix";
+      rev    = "dbce18f4808d27f6a51ce31585078b49c86bd2b5";
+      sha256 = "084hxnrywsgb73zr41argdkbhkxzm1rqn058pv1l4cp9g1gjr2rr";
+    };
+# fetchTarball https://github.com/nh2/static-haskell-nix/archive/d1b20f35ec7d3761e59bd323bbe0cca23b3dfc82.tar.gz;
+
+  # Import the pkgs provided by `static-haskell-nix`
+  pkgs = import "${static-haskell-nix}/nixpkgs.nix";
+
+  # Point the script at pwd, using a recent stackage snapshot
+  stack2nix-script = import "${static-haskell-nix}/static-stack2nix-builder/stack2nix-script.nix" {
+    inherit pkgs;
+    stack-project-dir = toString ./.;
+    hackageSnapshot   = "2020-05-24T00:00:00Z";
+  };
+
+  # Setup the builder
+  static-stack2nix-builder = import "${static-haskell-nix}/static-stack2nix-builder/default.nix" {
+    normalPkgs = pkgs;
+    inherit cabalPackageName compiler stack2nix-output-path;
+    # disableOptimization = true; # for compile speed
+  };
+
+  # Full invocation, including pinning `nix` version itself.
+  fullBuildScript = pkgs.writeScript "stack2nix-and-build-script.sh" ''
+    #!/usr/bin/env bash
+    set -eu -o pipefail
+    STACK2NIX_OUTPUT_PATH=$(${stack2nix-script})
+    export NIX_PATH=nixpkgs=${pkgs.path}
+    ${pkgs.nix}/bin/nix-build --no-link -A static_package --argstr stack2nix-output-path "$STACK2NIX_OUTPUT_PATH" "$@"
+  '';
+
+in
+  {
+    static_package = static-stack2nix-builder.static_package;
+    inherit fullBuildScript;
+    # For debugging:
+    # inherit static-stack2nix-builder;
+  }

nix/static/stack.yaml

@@ -0,0 +1,4 @@
+resolver: lts-14.7
+packages:
+- .
+extra-deps:

stack.yaml

@@ -1,5 +1,4 @@
 resolver: lts-14.7
-# resolver: lts-16.12
 packages:
 - .
 extra-deps: