cargoxx/CHANGELOG.md

Changelog

All notable changes to cargoxx will be documented in this file.

[Unreleased]

Added

• M0 repo skeleton: hand-written CMakeLists.txt, bootstrap flake.nix, empty C++23 module units for every component listed in TECH_SPEC.md §1 (util, exec, manifest, lockfile, layout, linkdb, resolver, codegen, cli), root module cargoxx, and a stub main.cpp that builds an empty cargoxx binary.
• .clang-format (LLVM, 100-column) and .gitignore.
• SPEC.md, TECH_SPEC.md.
• M1 foundation in cargoxx.util: ErrorCode (numbers per TECH_SPEC.md §4), Error, Result<T> = std::expected<T, Error>, and format(Error) rendering error[Ennnn]: ... with optional --> path:line:col and hint: lines. format lives in src/util/error.cpp as a module implementation unit.
• Catch2 v3 wired through flake.nix (libc++-built override) and registered in CMake; tests/util_error.cpp covers six format cases via catch_discover_tests.
• cargoxx.manifest public types (Package, Dependency, BuildSettings, Edition, Manifest) and parse(path) returning Result<Manifest>, backed by toml++ vendored as third_party/toml.hpp. Unknown keys in [package] / [build] and unknown top-level keys are rejected; reserved fields (description, repository, [dev-dependencies], [features], [workspace]) are accepted. tests/manifest_parse.cpp covers 17 cases.
• manifest::write(m, path) serializes a Manifest as TOML using toml++. Dependencies are emitted alphabetically (matches Cargo). Round-trip property is exercised by tests/manifest_write.cpp (9 cases). Defaulted operator== on the manifest structs supports comparison.
• cargoxx.layout public types (Target, TargetKind, DiscoveredLayout) and discover(project_root, package_name). Walks src/ recursively for the library (excluding the src/bin/ subtree), enumerates src/main.cpp, src/bin/*.cpp, tests/*.cpp, examples/*.cpp flat, sorts results for deterministic output, and returns LayoutNoTarget when neither a library nor any binary is present. tests/layout_discovery.cpp covers 12 cases.
• cargoxx new <name> and cargoxx new --lib <name> scaffold a project directory with Cargoxx.toml, src/main.cpp or src/lib.cppm, and a minimal .gitignore. Hyphens in the package name are mapped to underscores when generating the module/namespace identifier. Codegen of flake.nix / CMakeLists.txt is intentionally deferred to M3. CLI11 v2.6.2 vendored at third_party/CLI11.hpp; entry point is now cargoxx::cli::run(argc, argv). tests/cmd_new.cpp covers 9 cases.
• util::satisfies(version, range) — minimal semver range matcher supporting *, ==/>=/<=/>/< operators, and comma-separated AND clauses. Versions are zero-padded to three components. tests/semver_satisfies.cpp covers 7 cases.
• cargoxx.linkdb: Recipe, Database::open(), Database::resolve(...) for curated lookups. The curated database ships at data/linkdb.json with all 25 packages from SPEC.md §11. Component-substitution helpers expand {{components}} (space-joined) in find_package and fan out {{component}} per-target. Path is injected via the CARGOXX_LINKDB_DEFAULT_PATH compile definition. nlohmann/json 3.12.0 vendored at third_party/json.hpp. SQLite overlay and add_manual are deferred to the M2 follow-up commit. tests/linkdb_lookup.cpp covers 13 cases including a smoke test that resolves all 25 curated packages.
• cargoxx.lockfile: Lockfile, LockfilePackage types and parse(path) / write(lock, path) matching the format in SPEC.md §5. Also Lockfile::nixpkgs_rev() returns the shared revision (codegen will consume this in M3). tests/lockfile_round_trip.cpp covers 9 cases.
• cargoxx.codegen: GenerateInputs plus the pure function flake_nix(in) -> std::string. Substitutes the package name, the resolved nixpkgs revision (defaulting to nixos-unstable when the lockfile pins none), and a deduplicated list of dep nixpkgs_attr entries into buildInputs. Output is byte-deterministic. tests/codegen_flake.cpp covers 7 cases. Note: SPEC §7's template did not show buildInputs; we add one between nativeBuildInputs and the env.NIX_CFLAGS_COMPILE block as the natural slot for the deps that TECH_SPEC §10 says we splice in.
• SQLite overlay: Database::open(overlay_path) now opens (and creates, if missing) a per-user linkdb.sqlite cache, applying the schema from SPEC.md §9 idempotently. Default path is $XDG_CACHE_HOME/cargoxx/linkdb.sqlite (falling back to $HOME/.cache/cargoxx/...); tests pass an explicit temp path so they never touch the user cache. Database::add_manual(pkg, range, recipe) inserts a row with source = 'manual' and verified_at = now(); resolve() consults the overlay first and falls back to curated when no overlay row matches the requested version range. Manual entries never expire; nix-probe (v0.2) entries respect a 30-day freshness window. tests/linkdb_overlay.cpp covers 7 cases (insert/persist, override-curated, version-range gating, components rejection, move semantics).