fix(void): report pywhispercpp 1.5.0 and load CPU variants at runtime (#49)

Fixes #43
Fixes #44

tests/test_pywhispercpp_loader.py

@@ -0,0 +1,50 @@
+"""Preloading must leave ggml's runtime-selected CPU variants to ggml (#44)."""
+
+from pathlib import Path
+from unittest.mock import patch
+
+from vocalinux.utils import pywhispercpp_loader
+
+
+def _preload_names(tmp_path: Path, *names: str) -> list[str]:
+    """Run the preloader over ``names`` in one directory and return what it dlopens."""
+    for name in names:
+        (tmp_path / name).write_bytes(b"")
+    loaded: list[str] = []
+
+    def record(path: str, mode: int = 0) -> object:
+        loaded.append(Path(path).name)
+        return object()
+
+    with (
+        patch.object(pywhispercpp_loader, "find_shared_library_dirs", return_value=[str(tmp_path)]),
+        patch.object(pywhispercpp_loader, "_PRELOADED_LIBS", []),
+        patch.object(pywhispercpp_loader.ctypes, "CDLL", side_effect=record),
+    ):
+        pywhispercpp_loader.preload_shared_libraries()
+    return loaded
+
+
+def test_preload_leaves_runtime_cpu_variants_to_ggml(tmp_path: Path) -> None:
+    """Variants share one symbol table; preloading them RTLD_GLOBAL would interpose them."""
+    loaded = _preload_names(
+        tmp_path,
+        "libggml.so.0",
+        "libggml-base.so.0",
+        "libggml-cpu-x64.so",
+        "libggml-cpu-haswell.so",
+        "libggml-vulkan.so",
+        "libwhisper.so.1",
+    )
+
+    assert not [name for name in loaded if name.startswith("libggml-cpu-")]
+    assert {"libggml.so.0", "libggml-base.so.0", "libggml-vulkan.so", "libwhisper.so.1"} <= set(
+        loaded
+    )
+
+
+def test_preload_keeps_the_single_cpu_library_of_a_non_variant_build(tmp_path: Path) -> None:
+    """Without GGML_CPU_ALL_VARIANTS the CPU backend is a dependency and must be preloaded."""
+    loaded = _preload_names(tmp_path, "libggml.so.0", "libggml-cpu.so")
+
+    assert "libggml-cpu.so" in loaded