Semantic Versioning for Nix Flakes.

Thaw works by operating directly on the ref specified for your flake's inputs. If a ref exists on the input and is a valid SemVer version, thaw will attempt to upgrade it to the latest version. Both url querey param and object configuration syntax are supported.

By default, non-major upgrades are allowed, but this can be changed with the --major flag. No additional tools or components are required.

Supported flake input types:

• GitHub
• GitLab
• Gitea
• SourceHut

Need one of these supported? Open an issue or submit a pull request!

You can install this package imperatively with the following command.

nix profile install github:snowfallorg/thaw

You can install this package by adding it as an input to your Nix Flake.

{
	description = "My system thaw";

	inputs = {
		nixpkgs.url = "github:nixos/nixpkgs/nixos-23.05";

		# Snowfall Lib is not required, but will make configuration easier for you.
		snowfall-lib = {
			url = "github:snowfallorg/lib";
			inputs.nixpkgs.follows = "nixpkgs";
		};

		snowfall-thaw = {
			url = "github:snowfallorg/thaw";
			inputs.nixpkgs.follows = "nixpkgs";
		};
	};

	outputs = inputs:
		inputs.snowfall-lib.mkFlake {
			inherit inputs;
			src = ./.;

			overlays = with inputs; [
				# Use the overlay provided by this thaw.
				snowfall-thaw.overlays.default

				# There is also a named overlay, though the output is the same.
				snowfall-thaw.overlays."package/thaw"
			];
		};
}

If you've added the overlay from this flake, then in your system configuration you can add the snowfallorg.thaw package.

{ pkgs }:

{
	environment.systemPackages = with pkgs; [
		snowfallorg.thaw
	];
}

thaw

DESCRIPTION

  Upgrade Nix Flake inputs using SemVer.

USAGE

  $ thaw [options] [...inputs]

OPTIONS

  --flake, -f               Choose a flake other than the current directory
  --major, -M               Allow major version upgrades
  --init, -i                Initialize inputs to the latest version
  --dry-run, -d             Show available upgrades without applying them

  --help, -h                Show this help message
  --verbose                 Increase logging verbosity, up to 3 times