In reply to @lily:lily.flowers
nah, we need to make as many packages have rsync as a build-time reverse deps as possible (/s)

In reply to @kyle:iteratee.net
But it's a one-liner.

In reply to @kyle:iteratee.net
But it's a one-liner.

In reply to @qyriad:katesiria.org
I can never remember exactly what intersection of functionality install has, but it can copy and set permissions at the same time at least

In reply to @adis:blad.is
https://github.com/NixOS/nixpkgs/pull/289231

In reply to @janne.hess:helsinki-systems.de
I tried just mapping them over fetchurl and then npm cache add but that breaks prefetch-npm-deps for some reason (Error: invalid value: integer 1710428006885, expected u8 at line 1 column 223)

In reply to @lily:lily.flowers
can you share code?

Sure:

  passthru.frontend = buildNpmPackage rec { # TODO not rec
    pname = "elma-frontend";
    inherit version;
    src = ~/projects/test; #TODO inherit
    npmDeps = stdenvNoCC.mkDerivation {
      pname = "frontend-npm-cache";
      inherit version src;
      strictDeps = true;
      __structuredAttrs = true;

      dontPatch = true;
      dontConfigure = true;

      tars = lib.mapAttrsToList (_: v: fetchurl {
          url = v.resolved;
          hash = v.integrity;
        }) (lib.filterAttrs (_: v: v ? "resolved" && v ? "integrity")
            (builtins.fromJSON (builtins.readFile "${src}/package-lock.json")).packages
        );
      buildPhase = ''
        export HOME=/build
        npm config set cache "$out"
        for tar in "''${tars[@]}"; do
          echo "Adding $(stripHash "$tar") to npm cache"
          npm cache add "$tar"
        done
        cp package-lock.json "$out"
      '';
      dontInstall = true;

      nativeBuildInputs = [ nodePackages.npm cacert nodejs nukeReferences ];

      #outputHashMode = "recursive";
      #outputHash = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
    };
  };
}

In reply to @lily:lily.flowers
can you share code?

Sure:

  passthru.frontend = buildNpmPackage rec { # TODO not rec
    pname = "frontend";
    inherit version;
    src = ~/projects/test; #TODO inherit
    npmDeps = stdenvNoCC.mkDerivation {
      pname = "frontend-npm-cache";
      inherit version src;
      strictDeps = true;
      __structuredAttrs = true;

      dontPatch = true;
      dontConfigure = true;

      tars = lib.mapAttrsToList (_: v: fetchurl {
          url = v.resolved;
          hash = v.integrity;
        }) (lib.filterAttrs (_: v: v ? "resolved" && v ? "integrity")
            (builtins.fromJSON (builtins.readFile "${src}/package-lock.json")).packages
        );
      buildPhase = ''
        export HOME=/build
        npm config set cache "$out"
        for tar in "''${tars[@]}"; do
          echo "Adding $(stripHash "$tar") to npm cache"
          npm cache add "$tar"
        done
        cp package-lock.json "$out"
      '';
      dontInstall = true;

      nativeBuildInputs = [ nodePackages.npm cacert nodejs nukeReferences ];

      #outputHashMode = "recursive";
      #outputHash = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
    };
  };
}

In reply to @janne.hess:helsinki-systems.de
please don't tell me it's ugly, I already know ;)

In reply to @lily:lily.flowers
i'll take a look when i get a chance. am at nixcon this morning