Function generate_shim_metadata

build.py:171–196

Generates core.json from the library shim JAR.

()

    run_command(
        ["rustup", "component", "add", "rustc-dev", "rust-src", "llvm-tools-preview"],
        cwd=Config.ROOT_DIR,
    )

def build_runtime():
    """Builds the Java runtime support JAR."""
    if (not is_stale(Config.RUNTIME_JAR, Config.RUNTIME_SOURCES)
            and not contains_non_runtime_classes(Config.RUNTIME_JAR)):
        print(f"{Colors.GREEN}✅ Java runtime is up to date.{Colors.RESET}")
        return

    if not Config.RUNTIME_SOURCES:
        print(f"{Colors.RED}❌ No Java sources found under {Config.RUNTIME_DIR / 'src'}{Colors.RESET}")
        sys.exit(1)

    print(f"{Colors.CYAN}📚 Building Java runtime...{Colors.RESET}")

    if Config.RUNTIME_CLASSES_DIR.exists():
        shutil.rmtree(Config.RUNTIME_CLASSES_DIR)
    Config.RUNTIME_CLASSES_DIR.mkdir(parents=True, exist_ok=True)
    Config.RUNTIME_JAR.parent.mkdir(parents=True, exist_ok=True)

    source_paths = [str(path) for path in Config.RUNTIME_SOURCES]
    javac_base = ["javac", "-Xlint:-options", "-d", str(Config.RUNTIME_CLASSES_DIR)]
    proc = run_command(["javac", "--release", "8"] + javac_base[1:] + source_paths, check=False)
    if proc.returncode != 0:
        print(
            f"{Colors.YELLOW}⚠️  javac --release 8 failed; retrying with -source 8 -target 8.{Colors.RESET}"
        )
        run_command(["javac", "-source", "8", "-target", "8"] + javac_base[1:] + source_paths)