Oleks
a0852ff479
Reads the to-build derivation DAG from Nix (derivation show -r + --dry-run), applies a heuristic/history build-cost model with Amdahl core-scaling, and computes critical-path / peak-concurrency / list-scheduled makespan across a node×core grid to recommend a remote-builder shape. - schedule.py: pure critical-path, peak-concurrency, p-machine list scheduler - costmodel.py: heuristic table + --history override + core re-weighting - graph.py: DAG extraction via nix - estimate.py/cli.py: sweep + knee recommendation + report - tests: scheduler validated on toy DAGs (all pass) Prior-art gap documented (Hubble, nixbuild.net) in README.
36 lines
1.1 KiB
Nix
36 lines
1.1 KiB
Nix
{
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description = "nix-estimator — best builder configuration (nodes × cores) for a Nix build";
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inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
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outputs = { self, nixpkgs }:
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let
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systems = [ "x86_64-linux" "aarch64-linux" "aarch64-darwin" ];
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forAll = f: nixpkgs.lib.genAttrs systems (s: f nixpkgs.legacyPackages.${s});
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in
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{
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packages = forAll (pkgs: {
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default = pkgs.python3Packages.buildPythonApplication {
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pname = "nix-estimator";
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version = "0.1.0";
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pyproject = true;
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src = ./.;
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build-system = [ pkgs.python3Packages.hatchling ];
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# runtime needs `nix` on PATH to introspect derivations
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makeWrapperArgs = [ "--prefix" "PATH" ":" "${pkgs.nix}/bin" ];
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nativeCheckInputs = [ pkgs.python3Packages.pytest ];
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checkPhase = "pytest";
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};
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});
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devShells = forAll (pkgs: {
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default = pkgs.mkShell {
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packages = [
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(pkgs.python3.withPackages (ps: [ ps.pytest ]))
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pkgs.nix
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];
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};
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});
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};
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}
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