[nrf52] add support for native builds (#16898)

Co-authored-by: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com>

tests/unit_tests/build_gen/test_espidf.py

@@ -136,6 +136,54 @@ def test_get_project_cmakelists_full_emits_builtin_components_property(
     assert "JPEGDEC APPEND" not in content
 
 
+def test_get_component_cmakelists_no_link_flags() -> None:
+    """With no -Wl, flags the target_link_options block is emitted with an empty body."""
+    CORE.build_flags = set()
+    from esphome.build_gen.espidf import get_component_cmakelists
+
+    content = get_component_cmakelists()
+    assert "target_link_options(${COMPONENT_LIB} PUBLIC\n    \n)" in content
+
+
+def test_get_component_cmakelists_single_link_flag() -> None:
+    """A single -Wl, flag appears indented inside target_link_options."""
+    CORE.build_flags = {"-Wl,--gc-sections"}
+    from esphome.build_gen.espidf import get_component_cmakelists
+
+    content = get_component_cmakelists()
+    assert (
+        "target_link_options(${COMPONENT_LIB} PUBLIC\n    -Wl,--gc-sections\n)"
+        in content
+    )
+
+
+def test_get_component_cmakelists_multiple_link_flags_sorted() -> None:
+    """Multiple -Wl, flags are sorted and joined with the four-space indent."""
+    CORE.build_flags = {"-Wl,-z,noexecstack", "-Wl,--gc-sections", "-Wl,-Map=out.map"}
+    from esphome.build_gen.espidf import get_component_cmakelists
+
+    content = get_component_cmakelists()
+    expected = (
+        "target_link_options(${COMPONENT_LIB} PUBLIC\n"
+        "    -Wl,--gc-sections\n"
+        "    -Wl,-Map=out.map\n"
+        "    -Wl,-z,noexecstack\n"
+        ")"
+    )
+    assert expected in content
+
+
+def test_get_component_cmakelists_compile_flags_excluded_from_link_opts() -> None:
+    """-D and -W (non-linker) flags must not appear in target_link_options."""
+    CORE.build_flags = {"-DFOO", "-Wall", "-Wl,--gc-sections"}
+    from esphome.build_gen.espidf import get_component_cmakelists
+
+    content = get_component_cmakelists()
+    assert "-DFOO" not in content.split("target_link_options")[1]
+    assert "-Wall" not in content.split("target_link_options")[1]
+    assert "-Wl,--gc-sections" in content
+
+
 def test_get_project_cmakelists_emits_managed_components_property(
     tmp_path: Path,
 ) -> None:

tests/unit_tests/test_framework_helpers.py

@@ -25,6 +25,8 @@ from esphome.framework_helpers import (
     archive_extract_all,
     create_venv,
     download_from_mirrors,
+    get_project_compile_flags,
+    get_project_link_flags,
     get_python_env_executable_path,
     get_system_python_path,
     rmdir,
@@ -952,3 +954,84 @@ class TestSevenZipExtractAll:
         out.mkdir()
         archive_extract_all(archive, out)
         assert (out / "hello.txt").exists()
+
+
+# ---------------------------------------------------------------------------
+# get_project_compile_flags / get_project_link_flags
+# ---------------------------------------------------------------------------
+
+
+def _make_core(flags: set[str]):
+    core = MagicMock()
+    core.build_flags = flags
+    return core
+
+
+class TestGetProjectCompileFlags:
+    def test_returns_define_flags(self) -> None:
+        with patch("esphome.core.CORE", _make_core({"-DFOO", "-DBAR=1"})):
+            assert get_project_compile_flags() == ["-DBAR=1", "-DFOO"]
+
+    def test_returns_warning_flags(self) -> None:
+        with patch(
+            "esphome.core.CORE",
+            _make_core({"-Wno-error", "-Wall"}),
+        ):
+            assert get_project_compile_flags() == ["-Wall", "-Wno-error"]
+
+    def test_excludes_linker_flags(self) -> None:
+        with patch(
+            "esphome.core.CORE",
+            _make_core({"-DFOO", "-Wl,--gc-sections", "-Wl,-Map=output.map"}),
+        ):
+            assert get_project_compile_flags() == ["-DFOO"]
+
+    def test_excludes_other_flags(self) -> None:
+        with patch(
+            "esphome.core.CORE",
+            _make_core({"-O2", "-std=gnu++20", "-DFOO"}),
+        ):
+            assert get_project_compile_flags() == ["-DFOO"]
+
+    def test_empty_build_flags(self) -> None:
+        with patch("esphome.core.CORE", _make_core(set())):
+            assert get_project_compile_flags() == []
+
+    def test_result_is_sorted(self) -> None:
+        with patch(
+            "esphome.core.CORE",
+            _make_core({"-DZFLAG", "-DAFLAG", "-Wno-unused"}),
+        ):
+            result = get_project_compile_flags()
+            assert result == sorted(result)
+
+
+class TestGetProjectLinkFlags:
+    def test_returns_linker_flags(self) -> None:
+        with patch(
+            "esphome.core.CORE",
+            _make_core({"-Wl,--gc-sections", "-Wl,-Map=output.map"}),
+        ):
+            assert get_project_link_flags() == [
+                "-Wl,--gc-sections",
+                "-Wl,-Map=output.map",
+            ]
+
+    def test_excludes_compile_flags(self) -> None:
+        with patch(
+            "esphome.core.CORE",
+            _make_core({"-DFOO", "-Wall", "-Wl,--gc-sections"}),
+        ):
+            assert get_project_link_flags() == ["-Wl,--gc-sections"]
+
+    def test_empty_build_flags(self) -> None:
+        with patch("esphome.core.CORE", _make_core(set())):
+            assert get_project_link_flags() == []
+
+    def test_result_is_sorted(self) -> None:
+        with patch(
+            "esphome.core.CORE",
+            _make_core({"-Wl,-z", "-Wl,-a", "-Wl,-m"}),
+        ):
+            result = get_project_link_flags()
+            assert result == sorted(result)

tests/unit_tests/test_nrf52_framework.py

@@ -58,6 +58,9 @@ def nrf52_dirs(setup_core: Path) -> SimpleNamespace:
     toolchain_dir = tools / "toolchains" / _TOOLCHAIN_VERSION
     for d in (python_env, framework, toolchain_dir):
         d.mkdir(parents=True, exist_ok=True)
+    zephyr_scripts = framework / "zephyr" / "scripts"
+    zephyr_scripts.mkdir(parents=True, exist_ok=True)
+    (zephyr_scripts / "requirements.txt").touch()
     return SimpleNamespace(
         python_env=python_env,
         framework=framework,
@@ -102,6 +105,7 @@ class TestCheckAndInstall:
     ) -> None:
         """All three sentinels present → nothing downloaded or compiled."""
         (nrf52_dirs.python_env / ".ready").touch()
+        (nrf52_dirs.python_env / ".zephyr_reqs_ready").touch()
         (nrf52_dirs.framework / ".ready").touch()
         (nrf52_dirs.toolchain / ".ready").touch()
 
@@ -121,11 +125,13 @@ class TestCheckAndInstall:
         check_and_install()
 
         mock_nrf52_ops.create_venv.assert_called_once()
-        # pip install west, west init, west update
-        assert mock_nrf52_ops.run_command_ok.call_count == 3
-        mock_nrf52_ops.download_from_mirrors.assert_called_once()
-        mock_nrf52_ops.archive_extract_all.assert_called_once()
+        # pip install requirements, west init, west update, pip install zephyr reqs
+        assert mock_nrf52_ops.run_command_ok.call_count == 4
+        # minimal SDK + per-arch toolchain
+        assert mock_nrf52_ops.download_from_mirrors.call_count == 2
+        assert mock_nrf52_ops.archive_extract_all.call_count == 2
         assert (nrf52_dirs.python_env / ".ready").exists()
+        assert (nrf52_dirs.python_env / ".zephyr_reqs_ready").exists()
         assert (nrf52_dirs.framework / ".ready").exists()
         assert (nrf52_dirs.toolchain / ".ready").exists()
 
@@ -140,9 +146,10 @@ class TestCheckAndInstall:
         check_and_install()
 
         mock_nrf52_ops.create_venv.assert_not_called()
-        # west init + west update only (no pip install)
-        assert mock_nrf52_ops.run_command_ok.call_count == 2
-        mock_nrf52_ops.download_from_mirrors.assert_called_once()
+        # west init, west update, pip install zephyr reqs
+        assert mock_nrf52_ops.run_command_ok.call_count == 3
+        # minimal SDK + per-arch toolchain
+        assert mock_nrf52_ops.download_from_mirrors.call_count == 2
 
     def test_toolchain_only_missing(
         self,
@@ -151,24 +158,26 @@ class TestCheckAndInstall:
     ) -> None:
         """Venv and framework ready → only toolchain downloaded and extracted."""
         (nrf52_dirs.python_env / ".ready").touch()
+        (nrf52_dirs.python_env / ".zephyr_reqs_ready").touch()
         (nrf52_dirs.framework / ".ready").touch()
 
         check_and_install()
 
         mock_nrf52_ops.create_venv.assert_not_called()
         mock_nrf52_ops.run_command_ok.assert_not_called()
-        mock_nrf52_ops.download_from_mirrors.assert_called_once()
-        mock_nrf52_ops.archive_extract_all.assert_called_once()
+        # minimal SDK + per-arch toolchain
+        assert mock_nrf52_ops.download_from_mirrors.call_count == 2
+        assert mock_nrf52_ops.archive_extract_all.call_count == 2
 
-    def test_west_install_failure_raises(
+    def test_requirements_install_failure_raises(
         self,
         nrf52_dirs: SimpleNamespace,
         mock_nrf52_ops: SimpleNamespace,
     ) -> None:
-        """Failing pip install west raises EsphomeError."""
+        """Failing pip install -r requirements.txt raises EsphomeError."""
         mock_nrf52_ops.run_command_ok.return_value = False
 
-        with pytest.raises(EsphomeError, match="Install west"):
+        with pytest.raises(EsphomeError, match="Install requirements"):
             check_and_install()
 
     def test_framework_init_failure_raises(