i put

eval "$(nix-template completions zsh)"

in my zshrc

i get _arguments: command not found when i start a new shell

happens without a config too

env -i zsh -d -f -i
eval "$(nix-template completions zsh)"

Hi @jonringer!

I got to see your chat with @zimbatm on Nix friday, where you mentioned working on this project. Loved the idea, and reading through the README.md, I got inspired by the --comments item you left on your Roadmap.

Not sure you accept contributions to this project, but I tried out something and figured you might be interested: This PR adds a --documentation-links (or -d) option to add links to relevant sections of the Nixpkgs contributor guide.

And whether you want it or not: Thanks for nix-template!

before

nix-template --stdout stdenv --from-url=https://github.com/varlink/libvarlink
Determining latest release for libvarlink
Determining sha256 for libvarlink
{ lib, stdenv, fetchFromGitHub }:

stdenv.mkDerivation rec {
  pname = "libvarlink";
  version = "22";

  src = fetchFromGitHub {
    owner = "varlink";
    repo = pname;
    rev = "version";
    sha256 = "1i15227vlc9k4276r833ndhxrcys9305pf6dga1j0alx2vj85yz2";
  };

  buildInputs = [ ];

  meta = with lib; {
    description = "C implementation of the Varlink protocol and command line tool";
    homepage = "github.com/varlink/libvarlink";
    license = licenses.CHANGE;
    maintainers = with maintainers; [ artturin ];
  };
}

after

./result/bin/nix-template --stdout stdenv --from-url=https://github.com/varlink/libvarlink
Determining latest release for libvarlink
Determining sha256 for libvarlink
{ lib, stdenv, fetchFromGitHub }:

stdenv.mkDerivation rec {
  pname = "libvarlink";
  version = "22";

  src = fetchFromGitHub {
    owner = "varlink";
    repo = pname;
    rev = "version";
    sha256 = "1i15227vlc9k4276r833ndhxrcys9305pf6dga1j0alx2vj85yz2";
  };

  buildInputs = [ ];

  meta = with lib; {
    description = "C implementation of the Varlink protocol and command line tool";
    homepage = "https://github.com/varlink/libvarlink";
    license = licenses.CHANGE;
    maintainers = with maintainers; [ artturin ];
  };
}

➜ nix-template python --nixpkgs --pname mitmproxy_wireguard --from-url https://pypi.org/project/mitmproxy_wireguard
Determining latest release for mitmproxy_wireguard
[2022-12-07T17:55:37Z ERROR nix_template::url] Unable to parse response from pypi.io to json: Error { path: Path { segments: [Map { key: "info" }, Map { key: "project_urls" }] }, original: Error("missing field `Homepage`", line: 1, column: 6718) }

format should always be set for new packages even when it defaults to setuptools because it is planned to remove the implicit default. I would suggest to add format = "setuptools"; and leave people to change it to pyproject or some other when it doesn't work.

nix-template 0.4.0

sh -c "nix-template python --fetcher github --from-url https://github.com/victorfs/parsifal"
Determining latest release for parsifal
[2022-09-21T12:20:00Z ERROR nix_template::url] Unable to parse response from github to json: Error { path: Path { segments: [] }, original: Error("invalid type: map, expected a sequence", line: 1, column: 0) }

seems mostly an issue with python template. rust projects just works.

$ nix-template python --nixpkgs --pname avocado-framework --from-url https://pypi.org/project/avocado-framework
No [PATH] provided, defaulting to "pkgs/development/python-modules/"
Determining latest release for avocado-framework
[2022-04-27T11:18:19Z ERROR nix_template::url] Unable to parse response from pypi.io to json: Error { path: Path { segments: [Map { key: "info" }, Map { key: "platform" }] }, original: Error("invalid type: null, expected a string", line: 1, column: 12039) }

Help text for the PATH argument is as follows:

<PATH>        directory or file to be written. In the case of a directory, a default.nix will be created.

However, I couldn't get this working with directories:

$ mkdir test
$ nix-template module -p test test/
Cannot write to file 'test/', already exists

Trying to add nix-template to my home-manager configuration I get:

$HOST = aarch64-unknown-linux-gnu $TARGET = aarch64-unknown-linux-gnu openssl-sys = 0.9.65 It looks like you're compiling on Linux and also targeting Linux. Currently this requires the pkg-config utility to find OpenSSL but unfortunately pkg-config could not be found. If you have OpenSSL installed you can likely fix this by installing pkg-config.

I use this expression:

nix-template =
  self.ever-given.buildRustPackage {
    src =
      super.fetchFromGitHub {
        inherit (sources.nix-template) owner repo rev sha256;
       }; 
  };

nix-template Python --from-url github.com/YoyPa/isw
Determining latest release for isw
Determining sha256 for isw
[2021-07-12T04:24:27Z ERROR nix_template::url] Unable to parse response from github to json: Error("invalid type: null, expected a string", line: 1, column: 4000)

Would be nice to have an opinionated flake layout template

{
  description = "CHANGEME";

  inputs = {
    utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, utils }:
    let
      # put devShell and any other required packages into local overlay
      localOverlay = import ./nix/overlay.nix;
      
      pkgsForSystem = system: import nixpkgs {
        overlays = [
          localOverlay
        ];
        inherit system;
      };
    in utils.lib.eachSystem [ "x86_64-linux" ] (system: rec {
      legacyPackages = pkgsForSystem system;
      packages = utils.lib.flattenTree {
        inherit (pkgs) devShell myPkg;
      };
      defaultPackage = packages.myPkg;
      apps.<mypkg> = utils.lib.mkApp { drv = packages.myPkg; }
  });
}

Might be nice to create a guided prompt workflow for generating a nix expression or project, similar to npm init

• Do want to create a new flake project? [y/n]
  • If yes, ask for what language
    • then render #51 layout
  • If no, ask for what template they would like
    • Ask for pname, version, license, maintainer

Would be nice to be able to extend a template to give an opinionated flake project setup for a template:

flake.nix
flake.lock
nix/
  overlay.nix
  <pname>.nix

Allow some way to pass that many dependencies will be needed:

E.g. nix-template -p amqp-cpp -n -d zlib -d openssl

or

nix-template -p amqp-cpp -n -- zlib openssl

Would be nice that instead of just printing the attr addition line, that nix-template will just add the attr name at an appropriate location within the file.

The steps would roughly be:

• remove all comments,
• split file on paragraphs,
• then find location
• insert new package reference