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1 files changed, 63 insertions, 0 deletions

diff --git a/flake.nix b/flake.nix
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+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs";
+    opam-nix.url = "github:tweag/opam-nix";
+    flake-utils.url = "github:numtide/flake-utils";
+    nixpkgs.follows = "opam-nix/nixpkgs";
+  };
+  outputs = { self, flake-utils, opam-nix, nixpkgs }:
+    let package = "stitch";
+    in flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+        on = opam-nix.lib.${system};
+        devPackagesQuery = {
+          # You can add "development" packages here. They will get added to the devShell automatically.
+          ocaml-lsp-server = "*";
+          ocamlformat = "*";
+          ocamlfind = "*";
+          utop = "*";
+          odoc = "*";
+        };
+        query = devPackagesQuery // {
+          ## You can force versions of certain packages here, e.g:
+          ## - force the ocaml compiler to be taken from opam-repository:
+          ocaml-base-compiler = "*";
+          ## - or force the compiler to be taken from nixpkgs and be a certain version:
+          # ocaml-system = "4.14.0";
+          ## - or force ocamlfind to be a certain version:
+        };
+        scope = on.buildOpamProject' { } ./. query;
+        overlay = final: prev: {
+          # You can add overrides here
+          ${package} = prev.${package}.overrideAttrs (_: {
+            # Prevent the ocaml dependencies from leaking into dependent environments
+            doNixSupport = false;
+            buildInputs =
+              [ pkgs."gmp" pkgs."libev" pkgs."openssl" pkgs."libargon2" ];
+            DUNE_PROFILE = "release";
+          });
+        };
+        scope' = scope.overrideScope' overlay;
+        # The main package containing the executable
+        main = scope'.${package};
+        # Packages from devPackagesQuery
+        devPackages = builtins.attrValues
+          (pkgs.lib.getAttrs (builtins.attrNames devPackagesQuery) scope');
+      in {
+        legacyPackages = scope';
+
+        packages.default = main;
+
+        apps.stitch.default = {
+          type = "app";
+          program = "${main}/bin/stitch";
+        };
+
+        devShells.default = pkgs.mkShell {
+          inputsFrom = [ main ];
+          buildInputs = devPackages; 
+        };
+      });
+}
+