This is based on nixpkgs commit 862277ac9d34273cd953f42061e23d488d6b7e8b.
The resulting image is less than 25 MiB compressed.
The actual crosslink closure got shrunk from ~180 MiB to ~60 MiB just by using beam_minimal rather than beam as the base set in beams.nix!
| pkgs: let | |
| beamPkgs = with pkgs.beam_minimal; packagesWith interpreters.erlangR25; | |
| erlang = beamPkgs.erlang; | |
| elixir = beamPkgs.elixir_1_14; | |
| fetchMixDeps = beamPkgs.fetchMixDeps.override {inherit elixir;}; | |
| buildMix' = beamPkgs.buildMix'.override {inherit fetchMixDeps;}; | |
| mixRelease = beamPkgs.mixRelease.override {inherit elixir erlang fetchMixDeps;}; | |
| in {inherit erlang elixir buildMix' mixRelease fetchMixDeps;} |
| { | |
| mixRelease, | |
| fetchMixDeps, | |
| lib, | |
| }: | |
| mixRelease rec { | |
| pname = "cross-link"; | |
| version = "0.0.0"; | |
| src = ../.; | |
| mixFodDeps = fetchMixDeps { | |
| pname = "${pname}-deps"; | |
| inherit src version; | |
| sha256 = "sha256-NazEvRNJydlMuLXYRXFxnQSyhCVVy4J0G6q3nDV9XAQ="; | |
| }; | |
| } |
| { | |
| inputs.nixpkgs.url = "github:nixos/nixpkgs?ref=nixpkgs-unstable"; | |
| inputs.nobbz.url = "github:nobbz/nixos-config?ref=main"; | |
| outputs = { | |
| self, | |
| nixpkgs, | |
| nobbz, | |
| }: let | |
| pkgs = nixpkgs.legacyPackages.x86_64-linux; | |
| npkgs = nobbz.packages.x86_64-linux; | |
| spkgs = self.packages.x86_64-linux; | |
| bpkgs = import ./.nix/beams.nix pkgs; | |
| callPackage = pkgs.lib.callPackageWith (pkgs | |
| // npkgs | |
| // spkgs | |
| // { | |
| inherit callPackage; | |
| inherit (bpkgs) mixRelease fetchMixDeps; | |
| }); | |
| in { | |
| inherit (nobbz) formatter; | |
| devShells.x86_64-linux.default = callPackage ./.nix/shell.nix {}; | |
| packages.x86_64-linux = { | |
| inherit (bpkgs) erlang elixir; | |
| yamlfmt = callPackage ./.nix/yamlfmt.nix {}; | |
| crosslink = callPackage ./.nix/cross_link.nix {}; | |
| image = callPackage ./.nix/image.nix {}; | |
| }; | |
| }; | |
| } |
| { | |
| dockerTools, | |
| crosslink, | |
| }: | |
| dockerTools.buildLayeredImage { | |
| name = "${crosslink.pname}"; | |
| tag = "${crosslink.version}"; | |
| contents = crosslink; | |
| } |
As I have trouble following discussions on a gist, I'd suggest to move any further questions to the official discourse, which I can more actively watch, and where your problem is also more visible to other users.
Thanks for the advice! Makes sense about the elimination of erlang. I see that the elimination does happen in the closure, but when dockerising I see the erlang stuff return with a vengeance. I'll dig a bit deeper and report!