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author | sternenseemann <0rpkxez4ksa01gb3typccl0i@systemli.org> | 2021-03-18 15:14:37 +0100 |
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committer | sternenseemann <0rpkxez4ksa01gb3typccl0i@systemli.org> | 2021-03-18 15:14:37 +0100 |
commit | 88e0867d362a836eca870b0efecbefa57069fad5 (patch) | |
tree | c93f585a755eb520647218a6a950b7de9c7add10 /tests/system/kernel/bfq.nix | |
parent | 06b78c72027ed680f9e8e1e59814dc300b83f8c3 (diff) |
pkgs/sternenseemann/nix-env-diff: utility for comparing nix-env evals
nix-env-diff is a tiny utility which parses and compares the output of `nix-env -qaP --out-path`, printing all changed and added out paths (or attributes if desired). This facilitates a simple way to determine rebuilds or changed reverse dependencies when working on nixpkgs in a similar way as nixpkgs-review and ofborg do it. Both the new evaluation and the base evaluation to compare against have to be created manually using nix-env, which in turn also allows considering attribute sets that are normally not evaluated do to missing `lib.recurseIntoAttrs`. As an example, here is an example building all changed attributes in `ocaml-ng.ocamlPackages_4_12`: ``` nix-env -qaP -A ocaml-ng.ocamlPackages_4_12 --out-path -f . \ | nix-env-diff --attrs ./base-ocamlPackages_4_12 \ | xargs -n 1 -P 4 nix-instantiate --quiet -A \ | xargs nix-store --realise --builders 'ssh://edwin' ``` `./base-ocamlPackages_4_12` contains the result of the `nix-env` invocation executed on the master branch.
Diffstat (limited to 'tests/system/kernel/bfq.nix')
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