feeabe97af
Follow-up to my own #3171. That PR gave the deploy path its own cache and left the paragraph above it saying "package builds and checks reuse this" — which stopped being true in the same commit that made it false. Merged into one accurate lead-in. The surviving facts (built once, every consumer passes the same `cleanSrc`) are still worth stating; the claim about who consumes it belongs to the two blocks below, which say it correctly.
95 lines
4.4 KiB
Nix
95 lines
4.4 KiB
Nix
# Shared crane wiring for the rust workspace: the cargo source
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# filter, the once-built dependency artifacts, and the native build
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# inputs every rust derivation (packages + checks) consumes.
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# Imported per system from flake.nix.
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{ pkgs, craneLib }:
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let
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inherit (pkgs) lib;
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in
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rec {
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# Shared between buildDepsOnly + buildPackage + cargoClippy/cargoTest
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# so every derivation in the chain sees the same toolchain shape.
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# git: hive-c0re's `lifecycle::tests::setup_proposed_*` shell out to
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# `git init` + commit under `cargo test` in the sandbox.
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# sqlite: matrix-sdk's `sqlite` feature (`hive-matrix-mcp` workspace
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# member) — the matrix-sdk-sqlite + rusqlite stack links against
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# system libsqlite3 by default.
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# cmake: builds `aws-lc-sys` (BoringSSL) from source — pulled in by
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# the `rustls` (aws-lc-rs) crypto provider under the OTLP/reqwest
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# stack in `hive-metric`.
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nativeBuildInputs = [
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pkgs.git
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pkgs.sqlite
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pkgs.pkg-config
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pkgs.cmake
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];
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# Narrowed source tree the rust derivations consume: everything
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# cargo cares about (Cargo.toml/Cargo.lock + *.rs/*.toml), selected
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# via `lib.fileset` rather than crane's `cleanCargoSource` filter —
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# filesets drop directories that contain no selected files, so
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# adding or renaming a non-rust directory (nix modules, docs, …)
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# does NOT bust this src hash (an empty dir under a plain source
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# filter would). All non-rust runtime assets — branding + the claude
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# prompt template + claude-settings.json — live in the separate
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# `hyperhive-assets` derivation and are loaded by the binaries at
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# runtime from `$HIVE_ASSETS_DIR`. Net effect: only `*.rs` /
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# `*.toml` / `Cargo.lock` edits rebuild the rust derivations.
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cleanSrc = lib.fileset.toSource {
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root = ../.;
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fileset = craneLib.fileset.commonCargoSources ../.;
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};
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# The workspace's dependency tree, built once and cached as its own
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# derivation so a workspace-only edit doesn't rebuild deps. Every
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# consumer passes the same `cleanSrc`, keeping the input hash
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# consistent across the chain.
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#
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# Two dep caches, one per audience, and the split is not premature:
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# crane's `buildDepsOnly` defaults `doCheck = true`, which adds
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# `--all-targets` to the check and a `cargo test --no-run`, so the cache
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# compiles every dev-dependency and test harness in the tree. The CHECKS
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# need exactly that. A DEPLOY never runs a test binary and never links
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# one, so on the deploy path that work is compiled and thrown away.
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#
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# They are separate rather than shared because they were never actually
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# shared: CI evaluates against hyperhive's own nixpkgs pin, while a host
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# overrides it (security patches cannot wait on a lock bump upstream),
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# so the two closures differ and neither substitutes for the other. One
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# cache per audience therefore costs nobody a second build — it just
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# stops the deploy paying for artifacts only CI consumes.
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#
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# ⚠️ `buildDepsOnly` builds from `mkDummySrc`, so both hashes key on
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# Cargo.toml/Cargo.lock rather than on `.rs` files: a code edit rebuilds
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# neither, a dependency or toolchain change rebuilds both.
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cargoArtifacts = craneLib.buildDepsOnly {
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src = cleanSrc;
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# Workspace Cargo.toml is virtual (no `[package].name`), so crane
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# can't auto-derive a name. Spell it out explicitly — keeps the
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# derivation name stable across crane bumps + silences the
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# placeholder warning. Same `pname` for the dep + check
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# derivations so they share a clean naming family.
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pname = "hyperhive-workspace";
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version = "0.1.0";
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inherit nativeBuildInputs;
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};
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# The deploy path's cache: same deps, no test targets. `doCheck = false`
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# drops crane's `--all-targets` and its `cargo test --no-run`, so
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# dev-dependencies and test harnesses are never compiled here.
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#
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# Only `packages` consume this. Anything that needs to *run* a test —
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# `checks.cargo-test` — or lint one — `checks.clippy --all-targets` —
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# takes `cargoArtifacts` above instead, and would rebuild what it needs
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# if it were pointed here by mistake.
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cargoArtifactsBinOnly = craneLib.buildDepsOnly {
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src = cleanSrc;
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# Distinct pname so the two are told apart in build logs and store
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# paths; a shared name would make the useful question ("which cache
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# is this rebuild?") unanswerable at a glance.
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pname = "hyperhive-workspace-bin";
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version = "0.1.0";
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doCheck = false;
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inherit nativeBuildInputs;
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};
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}
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