nixos

46 readers

1 users here now

All about NixOS - https://nixos.org/

founded 4 years ago

How to merge multiple writeShellApplication into a single package? (lemmy.ml)

submitted 1 year ago by gomp@lemmy.ml to c/nixos@lemmy.ml

7 comments fedilink hide all child comments

I need to generate a number of scripts in my configuration and make them into a single package (for ease of reference, because there are a lot of them).

So far, I'm creating the scripts via writeShellApplication, making them into packages via an overlay, merging them with buildEnv and then adding the resulting package to `systemPackages.

Something like:

nixpkgs.overlays = [ (final: prev: {
  my-hello-1 = final.writeShellApplication {
    name = "my-hello-1-script";
    text = "echo my hello wolrd 1";
  };
  my-hello-2 = final.writeShellApplication {
    name = "my-hello-2-script";
    text = "echo my hello wolrd 1";
  };
  my-hello-scripts = final.buildEnv {
    name = "my-hello-scripts";
    paths = [ final.my-hello-1 final.my-hello-2 ];
  };
}) ];

environment.systemPackages = [ pkgs.my-hello-scripts ];

This works, but I don't really need the my-hello-1 and my-hello-2 packages... can you think of a way to make do without needing them?

you are viewing a single comment's thread
view the rest of the comments

[–] gomp@lemmy.ml 2 points 1 year ago* (last edited 1 year ago) (1 children)

That was my first idea (well, I say "my"... but it was really suggested by yourself in the question I posted the other day), but it results in nixos complaining that error: A definition for option 'environment.systemPackages."[definition 1-entry 1]"' is not of type 'package'.

It might very well be that I'm doing some stupid mistake here (or maybe it's something that used to work and doesn't anymore?)... here's what I used to test it out:

  environment.systemPackages = [
    pkgs.writeShellApplication {
      name = "some-script";
      text = "echo hello wolrd";
    }
  ];

Edit:

And indeed I was the one doing stupid things: it must be

  environment.systemPackages = [
    (pkgs.writeShellApplication {
      name = "some-script";
      text = "echo hello wolrd";
    })
  ];

with the parentheses, or it's a list with two elements (a function and an attrset)...

[–] hallettj 1 points 1 year ago

Oh yeah, the need for parenthesis often has me scratching my head for a bit