From 3b97c44e1006452aa5b08731c5cc02aec6db853c Mon Sep 17 00:00:00 2001
From: FliegendeWurst <2012gdwu+github@posteo.de>
Date: Tue, 3 Oct 2023 16:50:21 +0200
Subject: [PATCH] Add a nix expression for easier development

---
 README.md   |  4 +---
 default.nix | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+), 3 deletions(-)
 create mode 100644 default.nix

diff --git a/README.md b/README.md
index 0c040b4..026b51c 100644
--- a/README.md
+++ b/README.md
@@ -20,10 +20,8 @@ The used OLED display is from [Waveshare](https://www.waveshare.com/wiki/1.5inch
 
 ### Cross compile from NixOS x86_64
 
-Make sure to configure nixpkgs and [nur](https://github.com/nix-community/NUR) below.
-
 ```bash
-> nix-build -I nixpkgs=.../nixpkgs -I nur=.../nur-packages --arg crossSystem '(import <nixpkgs/lib>).systems.examples.muslpi' .../nur-packages -A raspi-oled-cross
+> nix-build --arg crossSystem '(import <nixpkgs/lib>).systems.examples.muslpi' -E 'with import <nixpkgs> {}; pkgsCross.muslpi.callPackage ./. { }'
 > mkdir /tmp/nixstore
 > nix copy --extra-experimental-features nix-command --extra-experimental-features flakes --no-check-sigs --to /tmp/nixstore $(readlink -f result)
 > rsync -r --links --info=progress --compress /tmp/nixstore/nix pi@himbeere-null:~/
diff --git a/default.nix b/default.nix
new file mode 100644
index 0000000..30a41b2
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,32 @@
+{ lib, fetchFromGitHub, rustPlatform, pkg-config, sqlite }:
+
+rustPlatform.buildRustPackage {
+  pname = "raspi-oled";
+  version = "unstable-infdev-4";
+
+  src = ./.;
+
+  cargoLock = {
+    lockFile = ./Cargo.lock;
+    outputHashes = {
+      "ssd1351-0.3.0" = "sha256-K6QCU9qPEuU7Ur8W6fTdi4JWk8NsVz3mLfV0afpfdBA=";
+	  # "gpio-am2302-rs-1.1.0" = "sha256-tyA/R80LtWIXoVEoxHhkmzy0IsMdMH1Oi3FTQ56XjyQ=";
+    };
+  };
+
+  nativeBuildInputs = [ pkg-config ];
+
+  cargoBuildFlags = [ "--no-default-features" ];
+
+  buildInputs = [ sqlite ];
+
+  RUSTC_BOOTSTRAP = "1";
+
+  meta = with lib; {
+    description = "OLED display of clock/calendar/temperature";
+    homepage = "https://github.com/FliegendeWurst/raspi-oled";
+    license = licenses.mit;
+    maintainers = with maintainers; [ fliegendewurst ];
+  };
+}
+