Building on NixOS / Nix

[Loosetooth]

Just creating this issue here, in case anyone else ever wants to build this package on NixOS / Nix.

The 'difficult' part is getting the right dependencies in place in order to build the node-canvas package.

For that, I wrote the following flake.nix file, containing the dependencies.:

{
  description = "Paper.js Development";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils }: flake-utils.lib.eachDefaultSystem (system:
    # Define pkgs as a variable for easier reference
    let
      pkgs = nixpkgs.legacyPackages.${system};
    in {
      devShell = with pkgs; mkShell {
        buildInputs = [
          nodejs_18
          pnpm
          cairo
          pango
          python3
          pkg-config
          libjpeg8
          giflib
          librsvg
        ];
      };
    }
  );
}

To install and build: in the root of the package:

nix develop
pnpm install
pnpm build

Here is my flake.lock file so you can have the exact dependency versions:

{
  "nodes": {
    "flake-utils": {
      "inputs": {
        "systems": "systems"
      },
      "locked": {
        "lastModified": 1726560853,
        "narHash": "sha256-X6rJYSESBVr3hBoH0WbKE5KvhPU5bloyZ2L4K60/fPQ=",
        "owner": "numtide",
        "repo": "flake-utils",
        "rev": "c1dfcf08411b08f6b8615f7d8971a2bfa81d5e8a",
        "type": "github"
      },
      "original": {
        "owner": "numtide",
        "repo": "flake-utils",
        "type": "github"
      }
    },
    "nixpkgs": {
      "locked": {
        "lastModified": 1726463316,
        "narHash": "sha256-gI9kkaH0ZjakJOKrdjaI/VbaMEo9qBbSUl93DnU7f4c=",
        "owner": "NixOS",
        "repo": "nixpkgs",
        "rev": "99dc8785f6a0adac95f5e2ab05cc2e1bf666d172",
        "type": "github"
      },
      "original": {
        "owner": "NixOS",
        "ref": "nixos-unstable",
        "repo": "nixpkgs",
        "type": "github"
      }
    },
    "root": {
      "inputs": {
        "flake-utils": "flake-utils",
        "nixpkgs": "nixpkgs"
      }
    },
    "systems": {
      "locked": {
        "lastModified": 1681028828,
        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
        "owner": "nix-systems",
        "repo": "default",
        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
        "type": "github"
      },
      "original": {
        "owner": "nix-systems",
        "repo": "default",
        "type": "github"
      }
    }
  },
  "root": "root",
  "version": 7
}

Maintainers: we can add these two files to the root of the repo, then NIX/NixOS users can always build the package.

But feel free to close this issue if that is out of scope :)

Hopefully curious NixOS users can still find this issue to save them some time.