From c747a18f219b3dd3d556b4e4222f613b0fd27f6f Mon Sep 17 00:00:00 2001
From: Zoe Roux <zoe.roux@zoriya.dev>
Date: Fri, 22 Dec 2023 11:12:51 +0100
Subject: [PATCH] Create flake.nix

---
 flake.lock |  46 ++++++++++++++++++++++++
 flake.nix  | 100 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 146 insertions(+)
 create mode 100644 flake.lock
 create mode 100644 flake.nix

diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..7c560f5
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,46 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1703013332,
+        "narHash": "sha256-+tFNwMvlXLbJZXiMHqYq77z/RfmpfpiI3yjL6o/Zo9M=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "54aac082a4d9bb5bbc5c4e899603abfb76a3f6d6",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-unstable",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "wlroots-src": "wlroots-src"
+      }
+    },
+    "wlroots-src": {
+      "flake": false,
+      "locked": {
+        "host": "gitlab.freedesktop.org",
+        "lastModified": 1700582773,
+        "narHash": "sha256-VUrnSG4UAAH0cBy15lG0w8RernwegD6lkOdLvWU3a4c=",
+        "owner": "wlroots",
+        "repo": "wlroots",
+        "rev": "767eedd3cbe9900687bf3b82236320dcd7b77aae",
+        "type": "gitlab"
+      },
+      "original": {
+        "host": "gitlab.freedesktop.org",
+        "owner": "wlroots",
+        "ref": "refs/tags/0.17.0",
+        "repo": "wlroots",
+        "type": "gitlab"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..fa84a9f
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,100 @@
+{
+  description = "A hackable wayland compositor based on views";
+  inputs = {
+    nixpkgs.url = "nixpkgs/nixos-unstable";
+
+    wlroots-src = {
+      type = "gitlab";
+      host = "gitlab.freedesktop.org";
+      owner = "wlroots";
+      repo = "wlroots";
+      ref = "refs/tags/0.17.0";
+      flake = false;
+    };
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    wlroots-src,
+  }: let
+    version = self.shortRev or "dirty";
+    supportedSystems = ["x86_64-linux"];
+
+    # Helper function to generate an attrset '{ x86_64-linux = f "x86_64-linux"; ... }'.
+    forAllSystems = f: nixpkgs.lib.genAttrs supportedSystems (system: f system);
+    # Nixpkgs instantiated for supported system types.
+    nixpkgsFor = forAllSystems (system:
+      import nixpkgs {
+        inherit system;
+        overlays = [self.overlay];
+      });
+  in {
+    overlay = final: prev:
+      with final; rec {
+        wlroots = prev.wlroots.overrideAttrs (old: {
+          version = wlroots-src.shortRev or "dirty";
+          src = wlroots-src;
+          buildInputs =
+            old.buildInputs
+            ++ [
+              hwdata
+              libliftoff
+              libdisplay-info
+            ];
+        });
+
+        gaze = with final;
+          final.callPackage ({inShell ? false}:
+            stdenv.mkDerivation rec {
+              name = "gaze-${version}";
+
+              # In 'nix develop', we don't need a copy of the source tree in the Nix store.
+              src =
+                if inShell
+                then null
+                else ./.;
+
+              buildInputs =
+                [
+                  zig
+                  wlroots
+                ]
+                ++ (
+                  if inShell
+                  then [
+                    # TODO: In 'nix develop', provide some developer tools.
+                  ]
+                  else []
+                );
+
+              target = "-Dcpu=baseline -Doptimize=ReleaseSafe";
+
+              buildPhase = "zig build ${target}";
+
+              doCheck = true;
+
+              checkPhase = "zig build test ${target}";
+
+              installPhase = ''
+                mkdir -p $out
+                # TODO: implement this :)
+              '';
+            }) {};
+      };
+
+    packages = forAllSystems (system: {
+      inherit (nixpkgsFor.${system}) gaze;
+    });
+    defaultPackage = forAllSystems (system: self.packages.${system}.gaze);
+
+    devShell = forAllSystems (system: self.packages.${system}.gaze.override {inShell = true;});
+
+    nixosModules.gaze = {pkgs, ...}: {
+      nixpkgs.overlays = [self.overlay];
+
+      passthru.providedSessions = ["gaze"];
+      # TODO: this
+    };
+  };
+}