Comptability with workspace-less monorepos with multiple crates with out-of-root resources

[matdibu]

Hello! I tried to use this in a monorepo with a crate which needs some resources outside of its cargo root

monorepo
├── resources
│   └── something.json
└── my-crate
    ├── Cargo.toml
    ├── Cargo.lock
    └── src

I've tried these as nci.projects.my-crate.path values:

• ./my-crate
• ./.

combining them with

nci.crates.my-crate = {
  drvConfig = {
    mkDerivation = {
      src =
        let
          inherit (lib.fileset)
            toSource
            intersection
            fromSource
            unions
            ;
          monorepo = toSource {
            root = ./.;
            fileset = intersection (fromSource (lib.sources.cleanSource ./.)) (unions [
              ./my-crate
              ./resources/something.json
            ]);
          };
        in
        lib.mkForce monorepo;
        
      # set the package source to the subdirectory in the monorepo
      postUnpack = ''
        cd $sourceRoot/my-crate
        sourceRoot="."
      '';
    };
  };
};

but nothing I tried worked:

• src = lib.mkForce monorepo
• src = lib.mkOverride 49 monorepo
• src = lib.mkOverride 1 monorepo

how could I accomplish this?

I got it working in crane exactly like this, with the src set to the filtered monorepo, manually specified cargoToml = ./my-crate/Cargo.toml; and cargoLock = ./my-crate/Cargo.lock;, and the postUnpack hook

[90-008]

if you set nci.projects.foobar.path the src will be the path you set earlier. you could then copy the resources in the postUnpack. i'm not sure why overriding the src doesn't work but at least that should work for now.

[matdibu]

this is how this was accomplished in crane: https://crane.dev/faq/workspace-not-at-source-root.html

is there an equivalent to this in NCI ?

[matdibu]

https://github.com/nix-community/dream2nix/blob/fbec3263cb4895ac86ee9506cdc4e6919a1a2214/examples/packages/languages/rust-packaging/flake.nix#L39

this seems relevant

[matdibu]

or maybe I should just use nci.lib.buildCrate

nix-cargo-integration/src/interface.nix

Line 84 in 05760a8

buildCrate = l.mkOption {

directly, and pass it the cratePath

[matdibu]

nix-cargo-integration/src/implementation.nix

Lines 147 to 158 in 05760a8

	drvConfig
	{
	deps.craneSource = inp.crane;
	deps.mkRustToolchain = mkRustToolchain;
	name = l.mkForce cargoToml.package.name;
	version = l.mkForce cargoToml.package.version;
	mkDerivation.src = l.mkForce src;
	rust-crane.depsDrv = depsDrvConfig;
	}

does this mean that any src specified via drvConfig is immediately overridden at line 155 ?

[90-008]

nix-cargo-integration/src/implementation.nix

Lines 147 to 158 in 05760a8

	drvConfig
	{
	deps.craneSource = inp.crane;
	deps.mkRustToolchain = mkRustToolchain;
	name = l.mkForce cargoToml.package.name;
	version = l.mkForce cargoToml.package.version;
	mkDerivation.src = l.mkForce src;
	rust-crane.depsDrv = depsDrvConfig;
	}

does this mean that any src specified via drvConfig is immediately overridden at line 155 ?

yeah, that should be correct... i think we could probably replace those with l.mkDefault, not sure why they are mkForce honestly?