# Shared crane wiring for the rust workspace: the cargo source
# filter, the once-built dependency artifacts, and the native build
# inputs every rust derivation (packages + checks) consumes.
# Imported per system from flake.nix.
{ pkgs, craneLib }:
let
  inherit (pkgs) lib;
in
rec {
  # Shared between buildDepsOnly + buildPackage + cargoClippy/cargoTest
  # so every derivation in the chain sees the same toolchain shape.
  # git: hive-c0re's `lifecycle::tests::setup_proposed_*` shell out to
  # `git init` + commit under `cargo test` in the sandbox.
  # sqlite: matrix-sdk's `sqlite` feature (`hive-matrix-mcp` workspace
  # member) — the matrix-sdk-sqlite + rusqlite stack links against
  # system libsqlite3 by default.
  # cmake: builds `aws-lc-sys` (BoringSSL) from source — pulled in by
  # the `rustls` (aws-lc-rs) crypto provider under the OTLP/reqwest
  # stack in `hive-metric`.
  nativeBuildInputs = [
    pkgs.git
    pkgs.sqlite
    pkgs.pkg-config
    pkgs.cmake
  ];

  # Narrowed source tree the rust derivations consume: everything
  # cargo cares about (Cargo.toml/Cargo.lock + *.rs/*.toml), selected
  # via `lib.fileset` rather than crane's `cleanCargoSource` filter —
  # filesets drop directories that contain no selected files, so
  # adding or renaming a non-rust directory (nix modules, docs, …)
  # does NOT bust this src hash (an empty dir under a plain source
  # filter would). All non-rust runtime assets — branding + the claude
  # prompt template + claude-settings.json — live in the separate
  # `hyperhive-assets` derivation and are loaded by the binaries at
  # runtime from `$HIVE_ASSETS_DIR`. Net effect: only `*.rs` /
  # `*.toml` / `Cargo.lock` edits rebuild the rust derivations.
  cleanSrc = lib.fileset.toSource {
    root = ../.;
    fileset = craneLib.fileset.commonCargoSources ../.;
  };

  # Build the workspace's dependency tree once, cached as its own
  # derivation. Package builds and checks reuse this via
  # `inherit cargoArtifacts;` so a workspace-only edit doesn't rebuild
  # deps. All consumers use the same `cleanSrc` so the input hash
  # stays consistent across the chain.
  cargoArtifacts = craneLib.buildDepsOnly {
    src = cleanSrc;
    # Workspace Cargo.toml is virtual (no `[package].name`), so crane
    # can't auto-derive a name. Spell it out explicitly — keeps the
    # derivation name stable across crane bumps + silences the
    # placeholder warning. Same `pname` for the dep + check
    # derivations so they share a clean naming family.
    pname = "hyperhive-workspace";
    version = "0.1.0";
    inherit nativeBuildInputs;
  };
}