Devour all outputs in a flake.
Running nix build .#a .#b ... .#z on a flake with that many outputs can be rather slow if the evaluation of those packages are non-trivial, as is often the case when using IFD. Nix evaluates separately for each of the argument (as if not using the eval cache).
To workaround this, we create a "consumer" flake that will depend on all outputs in the given input flake, and then run nix build on the consumer flake, which will then evaluate the input flake's packages only once.
devour-flake currently detects the following flake outputs:
| Type | Output Key |
|---|---|
| Standard flake outputs | packages, apps, checks, devShells |
| NixOS | nixosConfigurations.* |
| nix-darwin | darwinConfigurations.* |
| home-manager | legacyPackages.${system}.homeConfigurations.* |
To build all of the nammayatri flake outputs for example:
nix build github:srid/devour-flake \
-L --no-link --print-out-paths \
--override-input flake github:nammayatri/nammayatriPipe this to | cachix push <name> to push all flake outputs to cachix!
Add this repo as a non-flake input:
{
inputs = {
devour-flake.url = "github:srid/devour-flake";
devour-flake.flake = false;
};
}Then, add an overlay entry to your nixpkgs:
{
devour-flake = self.callPackage inputs.devour-flake { };
}Use pkgs.devour-flake to get a convenient executable that will devour the given flake and spit out the out paths. You can then use this in CI to build all outputs of a flake.
Note
See also: nixci, an improved version of
nix-build-all.
For a CI-friendly command that builds all flake outputs, in addition to checking for flake.lock consistency, use:
{ pkgs, ... }:
pkgs.writeShellApplication {
name = "nix-build-all";
runtimeInputs = [
pkgs.nix
pkgs.devour-flake
];
text = ''
# Make sure that flake.lock is sync
nix flake lock --no-update-lock-file
# Do a full nix build (all outputs)
# This uses https://github.com/srid/devour-flake
devour-flake . "$@"
'';
}- nixci: One command to run full Nix builds in CI or locally
- jenkins-nix-ci: Build all flake outputs in Jenkins, and push them to cachix.
- cachix-push: Push all flake outputs to cachix.
- Other projects:
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent