Check the forecast for today's Nix builds with a blazingly fast (🚀🔥🦀) CLI
Check the forecast for today's Nix builds
Usage: nix-forecast [OPTIONS] [INSTALLABLES]...
Arguments:
[INSTALLABLES]... A list of Nix installables to look for. If not given, all paths in nixpkgs are checked
Options:
-c, --configuration <CONFIGURATION> Flake reference pointing to a NixOS or nix-darwin configuration
-b, --binary-cache <BINARY_CACHE> URL of the substituter to check [default: https://cache.nixos.org]
-f, --flake <FLAKE> Flake reference of nixpkgs (or other package repository) [default: nixpkgs]
-s, --show-missing Show a list of store paths not found in the substituter
-h, --help Print help
-V, --version Print version
nix-forecast nixpkgs#{hello,gcc,clang,nrr}nix-forecast -c ".#nixosConfigurations.myMachine"nix-forecast -c ".#darwinConfigurations.myMac"Finding out if paths are cached can be a bit troublesome in Nix, with commands like nix build --dry-run
being the only solution a lot of the time. Meanwhile in the world of Guix, they have
had the guix weather command to do this for ages! This project aims to bring the power of that command right
to Nix
nix-weather is another project with a similar goal of bringing some of the features of guix weather to
Nix. However, it does introduce it's own spin on things and has much more of a focus on NixOS configurations.
In contrast, nix-forecast aims to be as close to the Guix command as possible, while also introducing more
generic support for Flake references, NixOS and nix-darwin
configurations, better error messages, and a (subjectively) more comfortable interface
I've also made it slightly faster :p
$ hyperfine --warmup 1 './result/bin/nix-weather --name glados --config ~/flake' './target/release/nix-forecast --configuration ~/flake#nixosConfigurations.glados'
Benchmark 1: ./result/bin/nix-weather --name glados --config ~/flake
Time (mean ± σ): 11.387 s ± 0.646 s [User: 3.422 s, System: 1.663 s]
Range (min … max): 10.490 s … 12.569 s 10 runs
Benchmark 2: ./target/release/nix-forecast --configuration ~/flake#nixosConfigurations.glados
Time (mean ± σ): 6.395 s ± 0.229 s [User: 0.992 s, System: 0.967 s]
Range (min … max): 6.231 s … 7.030 s 10 runs
Warning: Statistical outliers were detected. Consider re-running this benchmark on a quiet system without any interferences from other programs. It might help to use the '--warmup' or '--prepare' options.
Summary
./target/release/nix-forecast --configuration ~/flake#nixosConfigurations.glados ran
1.78 ± 0.12 times faster than ./result/bin/nix-weather --name glados --config ~/flake