fix: resolve same-build pcfile dependencies

src/hatch_nativelib/plugin.py

@@ -38,21 +38,20 @@ def initialize(self, version: str, build_data: T.Dict[str, T.Any]) -> None:
         #     for pkg in WheelBuilder(self.root).config.packages
         # ]
 
-        pcpaths: T.Set[str] = set()
         for pcfg in self._pcfiles:
             pcfile = self._generate_pcfile(pcfg, build_data)
-            pcpaths.add(str(pcfile.parent))
-
-        if pcpaths:
-            # Add to PKG_CONFIG_PATH so that it can be resolved by other hatchling
-            # plugins if desired
-            pkg_config_path = os.environ.get("PKG_CONFIG_PATH")
-            if pkg_config_path is not None:
-                os.environ["PKG_CONFIG_PATH"] = os.pathsep.join(
-                    (pkg_config_path, *pcpaths)
-                )
-            else:
-                os.environ["PKG_CONFIG_PATH"] = os.pathsep.join(pcpaths)
+            self._add_pkg_config_path(str(pcfile.parent))
+
+    def _add_pkg_config_path(self, *paths: str) -> None:
+        current = os.environ.get("PKG_CONFIG_PATH")
+        entries = current.split(os.pathsep) if current else []
+
+        for path in paths:
+            if path not in entries:
+                entries.append(path)
+
+        if entries:
+            os.environ["PKG_CONFIG_PATH"] = os.pathsep.join(entries)
 
     def clean(self, versions: T.List[str]) -> None:
         root = pathlib.Path(self.root)

tests/packages/demo-editable-chain/pyproject.toml

@@ -0,0 +1,24 @@
+[build-system]
+requires = ["hatchling", "hatch-nativelib"]
+build-backend = "hatchling.build"
+
+[project]
+name = "demo-editable-chain"
+version = "1.2.3"
+description = "Demo editable dependency chain"
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/demo_pkg"]
+
+[[tool.hatch.build.hooks.nativelib.pcfile]]
+pcfile = "src/demo_pkg/provider.pc"
+name = "provider"
+libdir = "src/demo_pkg/lib"
+shared_libraries = ["provider"]
+
+[[tool.hatch.build.hooks.nativelib.pcfile]]
+pcfile = "src/demo_pkg/consumer.pc"
+name = "consumer"
+libdir = "src/demo_pkg/lib"
+shared_libraries = ["consumer"]
+requires = ["provider"]

tests/test_integration_build_backend.py

@@ -101,3 +101,21 @@ def test_build_generates_init_module_for_multiple_shared_libraries(
     assert shared_library_filename("demo") in init_module
     assert shared_library_filename("helper") in init_module
     assert "return libs" in init_module
+
+
+def test_build_resolves_intra_project_requires_on_first_run(project_factory) -> None:
+    project_factory.copy_package_fixture("demo-editable-chain")
+    project_factory.write(
+        f"src/demo_pkg/lib/{shared_library_filename('provider')}",
+        "not-a-real-library",
+    )
+    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")
+    assert "import demo_pkg._init_provider" in init_module