fix: skip empty dependency initializer imports

src/hatch_nativelib/plugin.py

@@ -258,7 +258,8 @@ def _write_libinit_py(
         # TODO: should this be a fatal error
         if r.returncode == 0:
             module = r.stdout.decode("utf-8").strip()  # type: ignore[arg-type, union-attr]
-            contents.append(f"import {module}")
+            if module:
+                contents.append(f"import {module}")
 
     if contents[-1] != "":
         contents.append("")

tests/packages/demo-empty-init-dependency/pyproject.toml

@@ -0,0 +1,22 @@
+[build-system]
+requires = ["hatchling", "hatch-nativelib"]
+build-backend = "hatchling.build"
+
+[project]
+name = "demo-empty-init-dependency"
+version = "1.2.3"
+description = "Demo empty initializer dependency"
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/demo_pkg"]
+
+[[tool.hatch.build.hooks.nativelib.pcfile]]
+pcfile = "src/demo_pkg/virtual.pc"
+name = "virtual"
+
+[[tool.hatch.build.hooks.nativelib.pcfile]]
+pcfile = "src/demo_pkg/consumer.pc"
+name = "consumer"
+libdir = "src/demo_pkg/lib"
+shared_libraries = ["consumer"]
+requires = ["virtual"]

tests/test_integration_build_backend.py

@@ -119,3 +119,17 @@ def test_build_resolves_intra_project_requires_on_first_run(project_factory) ->
     assert result.returncode == 0, result.stdout + result.stderr
     init_module = project_factory.read("src/demo_pkg/_init_consumer.py")
     assert "import demo_pkg._init_provider" in init_module
+
+
+def test_build_skips_requirement_without_init_module(project_factory) -> None:
+    project_factory.copy_package_fixture("demo-empty-init-dependency")
+    project_factory.write(
+        f"src/demo_pkg/lib/{shared_library_filename('consumer')}",
+        "not-a-real-library",
+    )
+
+    result = project_factory.build_wheel()
+
+    assert result.returncode == 0, result.stdout + result.stderr
+    init_module = project_factory.read("src/demo_pkg/_init_consumer.py")
+    compile(init_module, "_init_consumer.py", "exec")