Add nix dev shell

Author: stevenroose

flake.lock

@@ -0,0 +1,91 @@
+{
+	description = "rust-bitcoinkernel";
+
+	inputs = {
+		nixpkgs.url = "nixpkgs/nixos-25.05";
+		flake-utils.url = "github:numtide/flake-utils";
+		fenix = {
+			url = "github:nix-community/fenix";
+			inputs.nixpkgs.follows = "nixpkgs";
+		};
+	};
+
+	outputs = { self, nixpkgs, flake-utils, fenix }:
+		flake-utils.lib.eachDefaultSystem (system:
+			let
+				pkgs = import nixpkgs {
+					inherit system;
+				};
+
+				rustVersion = "1.71.0";
+				rustToolchain = fenix.packages.${system}.fromToolchainName {
+					name = rustVersion;
+					sha256 = "sha256-ks0nMEGGXKrHnfv4Fku+vhQ7gx76ruv6Ij4fKZR3l78=";
+				};
+				rustBuildToolchain = fenix.packages.${system}.combine [
+					rustToolchain.rustc
+					rustToolchain.cargo
+					rustToolchain.rust-src
+					rustToolchain.rust-std
+				];
+
+				rustToolchainNightly = fenix.packages.${system}.fromToolchainName {
+					name = "nightly";
+					sha256 = "sha256-x+EWymRPcdfpK3I1N+Rr3RE0ld/KmNPEJGDnyxFyByE=";
+				};
+				rustBuildToolchainNightly = fenix.packages.${system}.combine [
+					rustToolchainNightly.rustc
+					rustToolchainNightly.cargo
+					rustToolchainNightly.rust-src
+					rustToolchainNightly.llvm-tools
+					rustToolchainNightly.rust-std
+				];
+				rustPlatformNightly = pkgs.makeRustPlatform {
+					cargo = rustBuildToolchainNightly;
+					rustc = rustBuildToolchainNightly;
+				};
+				rustfilt = rustPlatformNightly.buildRustPackage rec {
+					pname = "rustfilt";
+					version = "0.2.1";
+					src = pkgs.fetchFromGitHub {
+						owner = "luser";
+						repo = "rustfilt";
+						rev = version;
+						hash = "sha256-zb1tkeWmeMq7aM8hWssS/UpvGzGbfsaVYCOKBnAKwiQ=";
+					};
+					cargoLock.lockFile = "${src}/Cargo.lock";
+				};
+			in {
+				devShells.default = pkgs.mkShell {
+					packages = [
+						rustBuildToolchain
+
+						pkgs.cmake
+						pkgs.boost.dev
+						pkgs.cargo-fuzz
+					];
+
+					LIBCLANG_PATH = "${pkgs.llvmPackages.clang-unwrapped.lib}/lib/";
+				};
+
+				devShells.nightly = pkgs.mkShell {
+					packages = [
+						rustBuildToolchainNightly
+
+						pkgs.cmake
+						pkgs.boost.dev
+						pkgs.cargo-fuzz
+
+						pkgs.libllvm
+						pkgs.cargo-llvm-cov
+						rustfilt
+					];
+
+					LIBCLANG_PATH = "${pkgs.llvmPackages.clang-unwrapped.lib}/lib/";
+					LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath [
+						pkgs.gcc.cc.lib
+					];
+				};
+			}
+		);
+}