go-gst/flake.nix

{
  description = "Golang+gstreamer dev environment";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    gotk4-nix.url = "github:diamondburned/gotk4-nix";
    gotk4-nix.inputs = {
      nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = {
    self,
    nixpkgs,
    gotk4-nix,
    ...
  }: let
    systems = ["x86_64-linux" "aarch64-darwin"];
    forAllSystems = nixpkgs.lib.genAttrs systems;
  in {
    formatter = forAllSystems (system: nixpkgs.legacyPackages.${system}.alejandra);
    devShells = forAllSystems (system: let
      pkgs = import nixpkgs {
        inherit system;
      };
    in {
      default = pkgs.mkShell {
        nativeBuildInputs = with pkgs;
          [
            go
            go-tools # staticcheck & co.
            pkg-config

            gst_all_1.gstreamer
            gst_all_1.gst-editing-services
            gst_all_1.gst-libav
            gst_all_1.gst-plugins-bad
            gst_all_1.gst-plugins-base
            gst_all_1.gst-plugins-good
            gst_all_1.gst-plugins-rs
            gst_all_1.gst-plugins-ugly
            gst_all_1.gst-rtsp-server
            # gst_all_1.gst-vaapi not available in darwin
          ]
          ++ (gotk4-nix.lib.mkShell {inherit pkgs;}).baseDependencies;

        GO111MODULE = "on";
        CGO_ENABLED = "1";

        # needed for running delve
        # https://github.com/go-delve/delve/issues/3085
        # https://nixos.wiki/wiki/C#Hardening_flags
        # hardeningDisable = ["all"];

        # print the go version and gstreamer version on shell startup
        shellHook = ''
          ${pkgs.go}/bin/go version
          ${pkgs.gst_all_1.gstreamer}/bin/gst-launch-1.0 --version
        '';
      };
    });
  };
}