BUILD.bazel

load("@rules_rust//rust:defs.bzl", "rust_binary", "rust_library", "rust_test")

package(default_visibility = ["//visibility:public"])

# =============================================================================
# Library
# =============================================================================
# All 33 top-level modules + their nested sub-directories are captured by the
# recursive glob. Path aliases like `#[path = "2d/mod.rs"]` in src/lib.rs and
# sub-module `mod.rs` files are transparent to Bazel — rustc resolves them at
# compile time. `.bak` files are excluded as build pollution.
#
# `src/tests/**` is excluded here because the files under it are not part of
# the cocos4-rust library (lib.rs has no `mod tests;` declaration). They
# would only be valid as either (a) a separate integration test crate —
# rejected because their `use crate::math::...` / `use crate::storage::...`
# imports assume they're INSIDE cocos4-rust — or (b) an external binary
# (quaternion_test.rs) which we handle separately as //:quaternion_demo.
LIB_SRCS = glob(
    [
        "src/**/*.rs",
    ],
    exclude = [
        "src/main.rs",
        "src/tests/**",
        "**/*.bak",
    ],
)

rust_library(
    name = "cocos4_rust",
    srcs = LIB_SRCS,
    crate_root = "src/lib.rs",
    edition = "2021",
    crate_features = [
        # Matches Cargo.toml `default` features. `js-runtime-real` is
        # intentionally NOT enabled by default in the Bazel build. We
        # verified the wiring (boa_engine/serde_json materialize into
        # @crates//:) by flipping the feature on once — see the comment
        # below for the cargo-bazel path-member workaround and the
        # downstream toolchain blocker (regress 0.10.x requires nightly).
        # Re-enable by:
        #   1. Add "js-runtime-real" to crate_features below.
        #   2. Add "@crates//:boa_engine", "@crates//:serde_json" to deps.
        #   3. Make boa_engine/serde_json NON-optional direct deps in
        #      Cargo.toml (cargo-bazel 0.61.0 ignores
        #      `crate.annotation(crate_features = [...])` for path
        #      members; declaring them as required direct deps is the
        #      bypass).
        #   4. Add a stable-capable regress pin in Cargo.lock (regress
        #      0.10.1+ uses `if`/`let` chains — rust-lang/rust#53667,
        #      #54725 — which are nightly-only). Easiest path: pin
        #      regress 0.10.0 in Cargo.toml's [patch.crates-io] with a
        #      path source mirroring the vendor/paste/ trick; or
        #      upgrade the Bazel rust toolchain to nightly.
        "std",
        "gfx-empty",
        "gfx-validator",
        "gfx-wgpu",
        "gfx-agent",
        "pipeline-custom",
        "pipeline-deferred",
        "physics-2d",
        "network-real",
        "platform-real",
        "storage-disk",
        "dragon-bones",
        "spine",
        "js-bindings",
        "terrain",
        "tiled-map",
    ],
    deps = [
        # External crates — names match crate_universe's `@crates//:` namespace,
        # which is generated from Cargo.lock.
        "@crates//:bitflags",
        "@crates//:lazy_static",
        "@crates//:rand",
    ],
)

# =============================================================================
# Binary
# =============================================================================
rust_binary(
    name = "cocos4-rust",
    srcs = ["src/main.rs"],
    crate_root = "src/main.rs",
    edition = "2021",
    deps = [":cocos4_rust"],
)

# =============================================================================
# Tests
# =============================================================================

# All 1837 inline `#[cfg(test)] mod tests { ... }` blocks across 240 .rs files
# are exercised by re-compiling the library in test mode. rules_rust's
# `rust_test` with `crate = ":lib"` wires the lib sources back in automatically.
rust_test(
    name = "cocos4_rust_test",
    crate = ":cocos4_rust",
    # No `srcs` — crate = :cocos4_rust supplies the test compilation unit
)

# Orphan: src/tests/quaternion_test.rs is a stand-alone binary (fn main()).
# Preserved per project decision — exposed as :quaternion_demo. The
# `use cocos4_rust::math::...` import assumes the binary links against
# `//:cocos4_rust` (declared in `deps`).
rust_binary(
    name = "quaternion_demo",
    srcs = ["src/tests/quaternion_test.rs"],
    crate_root = "src/tests/quaternion_test.rs",
    edition = "2021",
    deps = [":cocos4_rust"],
)

# Aggregate suite so `bazel test //...` and `bazel test //:all_tests` both
# return a single PASS/FAIL summary.
test_suite(
    name = "all_tests",
    tests = [
        ":cocos4_rust_test",
    ],
)

# Aggregate build target for convenience
filegroup(
    name = "all_sources",
    srcs = glob(["src/**/*.rs", "src/**/*.bak"]) + [
        "Cargo.toml",
        "Cargo.lock",
    ],
)