1 files changed, 54 insertions, 0 deletions

diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..bcd9ed1
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,54 @@
+{
+  inputs = {
+    opam-nix.url = "github:tweag/opam-nix";
+    flake-utils.url = "github:numtide/flake-utils";
+    nixpkgs.follows = "opam-nix/nixpkgs";
+  };
+  outputs = { self, nixpkgs, flake-utils, opam-nix, ... }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+
+        package = "sand";
+        on = opam-nix.lib.${system};
+        localPackagesQuery = builtins.mapAttrs (_: pkgs.lib.last)
+          (on.listRepo (on.makeOpamRepo ./.));
+        devPackagesQuery = {
+          ocaml-lsp-server = "*";
+          ocamlformat = "*";
+          utop = "*";
+        };
+        query = devPackagesQuery // {
+          ocaml-base-compiler = "*";
+        };
+        scope = on.buildDuneProject { } package ./. query;
+        overlay = final: prev:
+          {
+            # You can add overrides here
+          };
+        scope' = scope.overrideScope' overlay;
+        # Packages from devPackagesQuery
+        devPackages = builtins.attrValues
+          (pkgs.lib.getAttrs (builtins.attrNames devPackagesQuery) scope');
+        # Packages in this workspace
+        packages =
+          pkgs.lib.getAttrs (builtins.attrNames localPackagesQuery) scope';
+      in {
+        legacyPackages = scope';
+
+        inherit packages;
+
+        devShells.default = pkgs.mkShell {
+
+          inputsFrom = builtins.attrValues packages;
+
+          buildInputs = devPackages ++ [
+            # You can add packages from nixpkgs here
+          ];
+
+          shellHook = ''
+            echo "version = `ocamlformat --version`" > .ocamlformat
+          '';
+        };
+      });
+}