esphome/tests/unit_tests/build_gen/test_espidf.py

"""Tests for esphome.build_gen.espidf module."""

from __future__ import annotations

import json
import logging
from pathlib import Path
from unittest.mock import patch

import pytest

from esphome.components.esp32 import (
    KEY_COMPONENTS,
    KEY_ESP32,
    KEY_EXCLUDE_COMPONENTS,
    KEY_IDF_VERSION,
    KEY_PATH,
    KEY_REF,
    KEY_REPO,
    register_exclude_components_cmake_arg,
)
import esphome.config_validation as cv
from esphome.const import KEY_CORE
from esphome.core import CORE


@pytest.fixture(autouse=True)
def _reset_core(tmp_path: Path) -> None:
    """Give each test its own CORE.build_path and a clean esp32 data slot."""
    CORE.build_path = str(tmp_path)
    CORE.data.setdefault(KEY_CORE, {})
    CORE.data[KEY_ESP32] = {
        KEY_COMPONENTS: {},
        KEY_EXCLUDE_COMPONENTS: set(),
        KEY_IDF_VERSION: cv.Version(5, 5, 4),
    }


def _write_project_description(
    tmp_path: Path, components: dict[str, str], idf_path: str = "/idf"
) -> None:
    """Stub a project_description.json with the given component_name -> dir map."""
    build_dir = tmp_path / "build"
    build_dir.mkdir(exist_ok=True)
    (build_dir / "project_description.json").write_text(
        json.dumps(
            {
                "idf_path": idf_path,
                "build_component_info": {
                    name: {"dir": dir_} for name, dir_ in components.items()
                },
            }
        )
    )


def _render(minimal: bool = False, builtin_components: list[str] | None = None) -> str:
    """Render the top-level CMakeLists with the standard variant/name patches."""
    with (
        patch("esphome.build_gen.espidf.get_esp32_variant", return_value="ESP32"),
        patch.object(CORE, "name", "test"),
    ):
        from esphome.build_gen.espidf import get_project_cmakelists

        return get_project_cmakelists(
            minimal=minimal, builtin_components=builtin_components
        )


def test_get_available_components_returns_none_without_build_path() -> None:
    """No build_path set yet: must not raise on Path(None)."""
    CORE.build_path = None
    from esphome.build_gen.espidf import get_available_components

    assert get_available_components() is None


def test_get_available_components_returns_none_without_project_description(
    tmp_path: Path,
) -> None:
    from esphome.build_gen.espidf import get_available_components

    assert get_available_components() is None


def test_get_available_components_keeps_only_idf_tree_components(
    tmp_path: Path,
) -> None:
    """Only components under idf_path/components are built-ins: src, managed,
    converted PIO libs and Arduino component_stubs are all left out."""
    _write_project_description(
        tmp_path,
        {
            "src": f"{tmp_path}/src",
            "esp_lcd": "/idf/components/esp_lcd",
            "espressif__arduino-esp32": f"{tmp_path}/managed_components/arduino",
            "JPEGDEC": f"{tmp_path}/pio_components/arduino/abc/bitbank2/JPEGDEC",
            "cbor": f"{tmp_path}/component_stubs/cbor",
            "freertos": "/idf/components/freertos",
        },
    )
    from esphome.build_gen.espidf import get_available_components

    assert sorted(get_available_components()) == ["esp_lcd", "freertos"]


def test_codegen_and_configure_writes_render_the_same_cmakelists(
    tmp_path: Path,
) -> None:
    """write_project() at codegen time (no list) and the configure-time write
    (discovered list) must agree, or ninja re-runs cmake on every build."""
    _write_project_description(
        tmp_path,
        {
            "lwip": "/idf/components/lwip",
            "cbor": f"{tmp_path}/component_stubs/cbor",
        },
    )
    from esphome.build_gen.espidf import get_available_components

    assert _render() == _render(builtin_components=get_available_components())
    assert "ESPHOME_PROJECT_BUILTIN_COMPONENTS cbor" not in _render()


def test_get_available_components_warns_when_nothing_is_under_idf_path(
    tmp_path: Path, caplog: pytest.LogCaptureFixture
) -> None:
    _write_project_description(tmp_path, {"cbor": f"{tmp_path}/component_stubs/cbor"})
    from esphome.build_gen.espidf import (
        get_available_components,
        has_discovered_components,
    )

    assert get_available_components() == []
    assert "No ESP-IDF components found under" in caplog.text
    # An empty discovery must not count as configured, or it would be latched in.
    assert not has_discovered_components()


def test_get_available_components_ignores_corrupt_or_unexpected_file(
    tmp_path: Path, caplog: pytest.LogCaptureFixture
) -> None:
    build_dir = tmp_path / "build"
    build_dir.mkdir()
    from esphome.build_gen.espidf import (
        get_available_components,
        has_discovered_components,
    )

    (build_dir / "project_description.json").write_text("{not json")
    assert get_available_components() is None
    assert not has_discovered_components()
    (build_dir / "project_description.json").write_text('{"build_component_info": {}}')
    with caplog.at_level(logging.DEBUG, logger="esphome.build_gen.espidf"):
        assert get_available_components() is None
    assert "Could not read" in caplog.text


def test_has_discovered_components_after_configure(tmp_path: Path) -> None:
    _write_project_description(tmp_path, {"lwip": "/idf/components/lwip"})
    from esphome.build_gen.espidf import has_discovered_components

    assert has_discovered_components()


@pytest.mark.parametrize("minimal", [False, True])
def test_get_project_cmakelists_emits_ldgen_override(
    minimal: bool, monkeypatch: pytest.MonkeyPatch
) -> None:
    """Both renders override the ldgen dep walker to drop the app archive,
    after include(project.cmake) which defines the original."""
    monkeypatch.delenv("ESPHOME_LDGEN_FULL_DEPS", raising=False)
    monkeypatch.delenv("ESPHOME_LDGEN_STRICT", raising=False)
    content = _render(minimal=minimal)
    assert "REMOVE_ITEM ${out_list_var} idf::src __idf_src" in content
    # Quoted so spaced elements survive and an empty list stays defined
    assert 'set(${out_list_var} "${${out_list_var}}" PARENT_SCOPE)' in content
    assert 'message(WARNING "ESPHome ldgen app archive exclusion' in content
    assert 'message(STATUS "ESPHome ldgen override target not found' in content
    assert 'message(WARNING "ESPHome ldgen override never filtered' in content
    assert content.index("tools/cmake/project.cmake") < content.index(
        "function(__ldgen_get_lib_deps_of_target"
    )
    # The never-filtered check must run after project() has walked the deps
    assert content.index("project(test)") < content.index("esphome_ldgen_armed GLOBAL")


def test_get_project_cmakelists_ldgen_strict_fails_closed(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    """ESPHOME_LDGEN_STRICT turns both degradation paths into hard errors so
    CI fails right away when an IDF bump breaks the override."""
    monkeypatch.delenv("ESPHOME_LDGEN_FULL_DEPS", raising=False)
    monkeypatch.setenv("ESPHOME_LDGEN_STRICT", "1")
    content = _render()
    assert 'message(FATAL_ERROR "ESPHome ldgen app archive exclusion' in content
    assert 'message(FATAL_ERROR "ESPHome ldgen override target not found' in content
    assert 'message(FATAL_ERROR "ESPHome ldgen override never filtered' in content
    assert "@SEVERITY@" not in content
    assert "@MISSING@" not in content


def test_get_project_cmakelists_ldgen_full_deps_escape_hatch(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    """ESPHOME_LDGEN_FULL_DEPS restores stock ldgen behavior."""
    monkeypatch.setenv("ESPHOME_LDGEN_FULL_DEPS", "true")
    content = _render()
    assert "__ldgen_get_lib_deps_of_target" not in content
    assert "esphome_ldgen_armed" not in content


def test_get_project_cmakelists_size_command_uses_json2() -> None:
    """The POST_BUILD size command uses the cheap json2 format, with --ng
    only on the 1.x tool bundled with IDF < 6."""
    content = _render()
    assert "-m esp_idf_size --ng --format=json2" in content

    CORE.data[KEY_ESP32][KEY_IDF_VERSION] = cv.Version(6, 0, 0)
    content = _render()
    assert "--ng" not in content
    assert "--format=json2" in content


def test_get_project_cmakelists_drops_empty_lwip_sources() -> None:
    """The filter comes after project(), where the lwip target exists."""
    from esphome.build_gen.espidf import (
        LWIP_EMPTY_SOURCES,
        LWIP_FULL_SOURCES_ENV,
        lwip_empty_source_gate,
    )

    content = _render()
    filter_at = content.index(
        "set_property(TARGET ${esphome_lwip_lib} PROPERTY SOURCES"
    )
    assert filter_at > content.index("project(")
    assert f"NOT DEFINED ENV{{{LWIP_FULL_SOURCES_ENV}}}" in content
    for entry in LWIP_EMPTY_SOURCES:
        assert lwip_empty_source_gate(*entry) in content


def test_get_project_cmakelists_declares_map_as_link_byproduct() -> None:
    """The link declares the map so size can build in the same ninja run."""
    content = _render()
    assert "BYPRODUCTS ${CMAKE_BINARY_DIR}/${CMAKE_PROJECT_NAME}.map" in content


def test_get_project_cmakelists_uses_supplied_builtin_components() -> None:
    """A cached list replaces project_description.json and is still filtered
    by EXCLUDE_COMPONENTS."""
    with patch.dict(CORE.cmake_args, {"EXCLUDE_COMPONENTS": "fatfs;unity"}):
        content = _render(builtin_components=["lwip", "fatfs", "esp_timer"])
    assert "ESPHOME_PROJECT_BUILTIN_COMPONENTS esp_timer APPEND" in content
    assert "ESPHOME_PROJECT_BUILTIN_COMPONENTS lwip APPEND" in content
    assert "ESPHOME_PROJECT_BUILTIN_COMPONENTS fatfs APPEND" not in content


def test_get_project_cmakelists_minimal_omits_builtin_components_property(
    tmp_path: Path,
) -> None:
    """Minimal write must not emit ESPHOME_PROJECT_BUILTIN_COMPONENTS even
    when project_description.json exists (the data may be stale on the
    first write before the discovery pass refreshes it)."""
    _write_project_description(tmp_path, {"esp_lcd": "/idf/components/esp_lcd"})

    content = _render(minimal=True)

    assert "ESPHOME_PROJECT_BUILTIN_COMPONENTS" not in content


def test_get_project_cmakelists_full_emits_builtin_components_property(
    tmp_path: Path,
) -> None:
    """Non-minimal write emits one idf_build_set_property line per built-in,
    sorted, and excludes src/managed/pio components."""
    _write_project_description(
        tmp_path,
        {
            "src": f"{tmp_path}/src",
            "esp_lcd": "/idf/components/esp_lcd",
            "freertos": "/idf/components/freertos",
            "espressif__esp-dsp": f"{tmp_path}/managed_components/esp-dsp",
            "JPEGDEC": f"{tmp_path}/pio_components/arduino/abc/bitbank2/JPEGDEC",
        },
    )

    content = _render()

    assert (
        "idf_build_set_property(ESPHOME_PROJECT_BUILTIN_COMPONENTS esp_lcd APPEND)"
        in content
    )
    assert (
        "idf_build_set_property(ESPHOME_PROJECT_BUILTIN_COMPONENTS freertos APPEND)"
        in content
    )
    # Excluded by get_available_components filtering.
    assert "espressif__esp-dsp APPEND" not in content
    assert "JPEGDEC APPEND" not in content


def test_get_project_cmakelists_emits_cmake_args() -> None:
    """Args registered via CORE.add_cmake_arg() are emitted as set() lines,
    on minimal writes too."""
    CORE.add_cmake_arg("EXECUTABLE_COMPONENT_NAME", "src")

    content = _render(minimal=True)

    assert 'set(EXECUTABLE_COMPONENT_NAME "src")' in content


def test_get_project_cmakelists_escapes_backslashes_in_cmake_args() -> None:
    """Backslashes (the only character escaping applies to; the rest are
    rejected at registration) are doubled so CMake reads the value back
    verbatim."""
    CORE.add_cmake_arg("MY_PATH", r"C:\esp\idf")

    content = _render(minimal=True)

    assert r'set(MY_PATH "C:\\esp\\idf")' in content


def test_get_project_cmakelists_emits_exclude_components(tmp_path: Path) -> None:
    """Excluded components are passed to IDF via EXCLUDE_COMPONENTS and are
    dropped from ESPHOME_PROJECT_BUILTIN_COMPONENTS even when a stale
    project_description.json still lists them (requiring an excluded
    component would pull it back into the build)."""
    _write_project_description(
        tmp_path,
        {
            "esp_lcd": "/idf/components/esp_lcd",
            "freertos": "/idf/components/freertos",
            "unity": "/idf/components/unity",
        },
    )
    CORE.data[KEY_ESP32][KEY_EXCLUDE_COMPONENTS] = {"unity", "esp_lcd"}
    register_exclude_components_cmake_arg()

    content = _render()

    assert 'set(EXCLUDE_COMPONENTS "esp_lcd;unity")' in content
    # Must be set before project() so project.cmake sees it.
    assert content.index("set(EXCLUDE_COMPONENTS") < content.index("project(test)")
    assert (
        "idf_build_set_property(ESPHOME_PROJECT_BUILTIN_COMPONENTS freertos APPEND)"
        in content
    )
    assert "ESPHOME_PROJECT_BUILTIN_COMPONENTS unity" not in content
    assert "ESPHOME_PROJECT_BUILTIN_COMPONENTS esp_lcd" not in content


def test_get_project_cmakelists_minimal_emits_exclude_components() -> None:
    """The discovery (minimal) write also excludes components so they never
    register in project_description.json."""
    CORE.data[KEY_ESP32][KEY_EXCLUDE_COMPONENTS] = {"unity"}
    register_exclude_components_cmake_arg()

    content = _render(minimal=True)

    assert 'set(EXCLUDE_COMPONENTS "unity")' in content


def test_get_project_cmakelists_no_exclude_components_line_when_empty() -> None:
    """No EXCLUDE_COMPONENTS line at all when nothing is excluded."""
    register_exclude_components_cmake_arg()

    content = _render()

    assert "EXCLUDE_COMPONENTS" not in content


def test_include_builtin_idf_component_removes_exclusion() -> None:
    """include_builtin_idf_component() drops a name from the exclusion set so
    a component a config actually uses is not passed to EXCLUDE_COMPONENTS."""
    from esphome.components.esp32 import (
        exclude_builtin_idf_component,
        get_excluded_builtin_components,
        include_builtin_idf_component,
    )

    exclude_builtin_idf_component("esp_eth")
    exclude_builtin_idf_component("unity")
    include_builtin_idf_component("esp_eth")

    assert get_excluded_builtin_components() == ["unity"]

    register_exclude_components_cmake_arg()
    content = _render()

    assert 'set(EXCLUDE_COMPONENTS "unity")' in content
    assert "esp_eth" not in content


def test_write_project_writes_exclude_components_stamp(tmp_path: Path) -> None:
    """write_project() snapshots the exclusion set; the toolchain watches the
    stamp to trigger a discovery reconfigure when the set changes (excluded
    components never register in project_description.json)."""
    CORE.build_flags = set()
    CORE.build_path = tmp_path
    CORE.data[KEY_ESP32][KEY_EXCLUDE_COMPONENTS] = {"unity", "esp_lcd"}

    with (
        patch("esphome.build_gen.espidf.get_esp32_variant", return_value="ESP32"),
        patch.object(CORE, "name", "test"),
    ):
        from esphome.build_gen.espidf import write_project

        write_project()

    stamp = tmp_path / "exclude_components.esphomeinternal"
    assert stamp.read_text() == "esp_lcd;unity"


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_component_cmakelists_globs_alternate_cpp_extensions() -> None:
    """Both app_sources glob variants include .cc/.cxx/.c++ so vendored sources
    are compiled, matching the extensions PlatformIO's builder globs by default."""
    CORE.build_flags = set()
    from esphome.build_gen.espidf import get_component_cmakelists

    content = get_component_cmakelists()
    for ext in ("cc", "cxx", "c++"):
        assert content.count(f'"${{CMAKE_CURRENT_SOURCE_DIR}}/*.{ext}"') == 2
        assert content.count(f'"${{CMAKE_CURRENT_SOURCE_DIR}}/esphome/*.{ext}"') == 2


def test_get_project_cmakelists_emits_managed_components_property(
    tmp_path: Path,
) -> None:
    """ESPHOME_PROJECT_MANAGED_COMPONENTS is always emitted (both modes)
    from the esp32 add_idf_component registry."""
    CORE.data[KEY_ESP32][KEY_COMPONENTS] = {
        "espressif/esp-dsp": {KEY_REPO: None, KEY_REF: "1.7.1", KEY_PATH: None},
        "espressif/arduino-esp32": {KEY_REPO: None, KEY_REF: "3.3.8", KEY_PATH: None},
    }

    with (
        patch("esphome.build_gen.espidf.get_esp32_variant", return_value="ESP32"),
        patch.object(CORE, "name", "test"),
    ):
        from esphome.build_gen.espidf import get_project_cmakelists

        for minimal in (True, False):
            content = get_project_cmakelists(minimal=minimal)
            assert (
                "idf_build_set_property(ESPHOME_PROJECT_MANAGED_COMPONENTS"
                " espressif__arduino-esp32 APPEND)"
            ) in content
            assert (
                "idf_build_set_property(ESPHOME_PROJECT_MANAGED_COMPONENTS"
                " espressif__esp-dsp APPEND)"
            ) in content


def test_get_project_cmakelists_replaces_cpp_standard(tmp_path: Path) -> None:
    """cg.set_cpp_standard() replaces the IDF default -std in
    CXX_COMPILE_OPTIONS between include(project.cmake) and project()."""
    with (
        patch("esphome.build_gen.espidf.get_esp32_variant", return_value="ESP32"),
        patch.object(CORE, "name", "test"),
        patch.object(CORE, "cpp_standard", "gnu++20"),
    ):
        from esphome.build_gen.espidf import get_project_cmakelists

        content = get_project_cmakelists(minimal=True)

    assert (
        "idf_build_get_property(esphome_cxx_compile_options CXX_COMPILE_OPTIONS)"
        in content
    )
    assert 'list(FILTER esphome_cxx_compile_options EXCLUDE REGEX "^-std=")' in content
    assert 'list(APPEND esphome_cxx_compile_options "-std=gnu++20")' in content
    # The replacement must come after project.cmake (which appends the IDF
    # default) and before project() (which consumes the options).
    include_pos = content.index("tools/cmake/project.cmake")
    replace_pos = content.index("CXX_COMPILE_OPTIONS")
    project_pos = content.index("project(test)")
    assert include_pos < replace_pos < project_pos


def test_get_project_cmakelists_no_cpp_standard(tmp_path: Path) -> None:
    with (
        patch("esphome.build_gen.espidf.get_esp32_variant", return_value="ESP32"),
        patch.object(CORE, "name", "test"),
        patch.object(CORE, "cpp_standard", None),
        patch.object(CORE, "cxx_build_flags", set()),
    ):
        from esphome.build_gen.espidf import get_project_cmakelists

        content = get_project_cmakelists(minimal=True)

    assert "CXX_COMPILE_OPTIONS" not in content


def test_get_project_cmakelists_cxx_build_flags(tmp_path: Path) -> None:
    """Flags registered via cg.add_cxx_build_flag() are appended to
    CXX_COMPILE_OPTIONS (C++-only, GCC warns if they reach C compiles)
    between include(project.cmake) and project()."""
    with (
        patch("esphome.build_gen.espidf.get_esp32_variant", return_value="ESP32"),
        patch.object(CORE, "name", "test"),
        patch.object(CORE, "cpp_standard", None),
        patch.object(CORE, "cxx_build_flags", {"-Wno-volatile"}),
    ):
        from esphome.build_gen.espidf import get_project_cmakelists

        content = get_project_cmakelists(minimal=True)

    flag_line = 'idf_build_set_property(CXX_COMPILE_OPTIONS "-Wno-volatile" APPEND)'
    assert flag_line in content
    include_pos = content.index("tools/cmake/project.cmake")
    flag_pos = content.index(flag_line)
    project_pos = content.index("project(test)")
    assert include_pos < flag_pos < project_pos


def test_get_component_cmakelists_no_compile_features() -> None:
    """The C++ standard is pinned project-wide via CXX_COMPILE_OPTIONS in the
    top-level CMakeLists; the src component must not set its own."""
    with patch.object(CORE, "build_flags", set()):
        from esphome.build_gen.espidf import get_component_cmakelists

        content = get_component_cmakelists()

    assert "target_compile_features" not in content


def _make_pch_project(tmp_path: Path) -> Path:
    """A build path with the core headers, an sdkconfig and a lock file."""
    from esphome.build_helpers.pch import PCH_DEFAULT_HEADERS

    CORE.build_path = tmp_path
    for header in PCH_DEFAULT_HEADERS:
        path = tmp_path / "src" / header
        path.parent.mkdir(parents=True, exist_ok=True)
        path.write_text('#include "esphome/core/defines.h"\n')
    (tmp_path / "src" / "esphome" / "core" / "defines.h").write_text("#define M 1\n")
    (tmp_path / "sdkconfig.test").write_text("CONFIG_X=y\n")
    (tmp_path / "dependencies.lock").write_text("espressif/mdns: 1.12.0\n")
    return tmp_path


def _pch_checksum() -> str:
    from esphome.build_gen.espidf import _PCH_SUM_PATH, write_pch_checksum

    with patch.object(CORE, "name", "test"):
        write_pch_checksum()
    return CORE.relative_build_path(_PCH_SUM_PATH).read_text()


def test_component_cmakelists_pch_block(monkeypatch: pytest.MonkeyPatch) -> None:
    from esphome.build_gen.espidf import get_component_cmakelists

    content = get_component_cmakelists()
    assert (
        "target_precompile_headers(${COMPONENT_LIB} PRIVATE\n"
        '    "$<$<COMPILE_LANGUAGE:CXX>:${CMAKE_CURRENT_SOURCE_DIR}/'
        'esphome/core/pch_prefix.h>"\n)'
    ) in content
    monkeypatch.setenv("ESPHOME_PCH_ENABLE", "0")
    assert "target_precompile_headers" not in get_component_cmakelists()


def test_component_cmakelists_pch_gate_on_windows(
    windows_gcc_rule: None, monkeypatch: pytest.MonkeyPatch
) -> None:
    """The block carries the rule and records its choice; the knob drops
    the gate."""
    from esphome.build_gen.espidf import get_component_cmakelists

    content = get_component_cmakelists()
    assert (
        'if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND '
        "(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 14.4 OR "
        "(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 15 AND "
        "CMAKE_CXX_COMPILER_VERSION VERSION_LESS 15.3)))\n"
        "  message(STATUS " in content
    )
    assert (
        '  set(ESPHOME_PCH OFF CACHE BOOL "ESPHome precompiled header in use" FORCE)\nelse()\n'
        in content
    )
    assert (
        '  set(ESPHOME_PCH ON CACHE BOOL "ESPHome precompiled header in use" FORCE)\n  target_precompile_headers(${COMPONENT_LIB} PRIVATE\n'
        in content
    )
    assert "endif()" in content
    monkeypatch.setenv("ESPHOME_PCH_ENABLE", "1")
    content = get_component_cmakelists()
    assert "if(CMAKE_CXX_COMPILER_VERSION" not in content
    assert "\ntarget_precompile_headers(${COMPONENT_LIB} PRIVATE\n" in content


@pytest.mark.parametrize(("choice", "written"), [("OFF", False), ("ON", True)])
def test_pch_checksum_follows_the_cmake_choice_on_windows(
    windows_gcc_rule: None, tmp_path: Path, choice: str, written: bool
) -> None:
    from esphome.build_gen.espidf import _PCH_SUM_PATH, write_pch_checksum

    _make_pch_project(tmp_path)
    with (
        patch(
            "esphome.espidf.toolchain.get_cmake_cache_value", return_value=choice
        ) as asked,
        patch.object(CORE, "name", "test"),
    ):
        write_pch_checksum()
    assert asked.call_args.args == ("ESPHOME_PCH",)
    assert CORE.relative_build_path(_PCH_SUM_PATH).exists() is written


@pytest.mark.parametrize(
    ("file", "content"),
    [
        ("src/esphome/core/defines.h", "#define M 2\n"),
        ("sdkconfig.test", "CONFIG_X=n\n"),
        ("dependencies.lock", "espressif/mdns: 1.13.0\n"),
    ],
)
def test_pch_checksum_tracks_its_inputs(
    tmp_path: Path, file: str, content: str
) -> None:
    """The checksum stands in for the .gch in ccache, so it has to change
    with a core header, the sdkconfig and a managed component version."""
    project = _make_pch_project(tmp_path)
    first = _pch_checksum()
    assert len(first.strip()) == 64
    (project / file).write_text(content)
    assert _pch_checksum() != first


def test_pch_checksum_is_the_same_for_two_devices(tmp_path: Path) -> None:
    sums = []
    for name in ("dev_a", "dev_b"):
        _make_pch_project(tmp_path / name)
        sums.append(_pch_checksum())
    assert sums[0] == sums[1]


def test_pch_checksum_disabled_writes_nothing(
    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
    from esphome.build_gen.espidf import _PCH_SUM_PATH, write_pch_checksum

    monkeypatch.setenv("ESPHOME_PCH_ENABLE", "0")
    _make_pch_project(tmp_path)
    write_pch_checksum()
    assert not CORE.relative_build_path(_PCH_SUM_PATH).exists()


# The macro body as shipped in tools/cmake/build.cmake; byte identical in
# IDF 5.5.5 and 6.1.0, so one fixture covers both supported versions.
IDF_BUILD_CMAKE = """\
some_other_cmake()

macro(__build_process_project_includes)
    # Include the sdkconfig cmake file, since the following operations require
    # knowledge of config values.
    idf_build_get_property(sdkconfig_cmake SDKCONFIG_CMAKE)
    include(${sdkconfig_cmake})

    # Make each build property available as a read-only variable
    idf_build_get_property(build_properties __BUILD_PROPERTIES)
    foreach(build_property ${build_properties})
        idf_build_get_property(val ${build_property})
        set(${build_property} "${val}")
    endforeach()

    idf_build_get_property(build_component_targets __BUILD_COMPONENT_TARGETS)

    # Include each component's project_include.cmake
    foreach(component_target ${build_component_targets})
        __component_get_property(dir ${component_target} COMPONENT_DIR)
        __component_get_property(_name ${component_target} COMPONENT_NAME)
        set(COMPONENT_NAME ${_name})
        set(COMPONENT_DIR ${dir})
        set(COMPONENT_PATH ${dir})  # this is deprecated, users are encouraged to use COMPONENT_DIR;
                                    # retained for compatibility
        if(EXISTS ${COMPONENT_DIR}/project_include.cmake)
            include(${COMPONENT_DIR}/project_include.cmake)
        endif()
    endforeach()
endmacro()
"""


def _write_idf_build_cmake(tmp_path: Path, text: str = IDF_BUILD_CMAKE) -> Path:
    idf = tmp_path / "idf"
    (idf / "tools" / "cmake").mkdir(parents=True)
    (idf / "tools" / "cmake" / "build.cmake").write_text(text)
    return idf


def test_normalized_macro_strips_comments_and_whitespace() -> None:
    from esphome.build_gen.espidf import _normalized_macro

    text = "macro(__build_process_project_includes)\n  a( b )  # tail\n\n  # only\n  c(d)\nendmacro()"
    assert _normalized_macro(text) == ["a( b )", "c(d)"]


def test_normalized_macro_none_without_macro() -> None:
    from esphome.build_gen.espidf import _normalized_macro

    assert _normalized_macro("nothing here") is None


def test_idf_macro_matches_the_shipped_body(tmp_path: Path) -> None:
    """The override's embedded copy must equal what build.cmake ships."""
    from esphome.build_gen.espidf import idf_macro_matches

    assert idf_macro_matches(_write_idf_build_cmake(tmp_path)) is True


def test_idf_macro_mismatch_detected(tmp_path: Path) -> None:
    from esphome.build_gen.espidf import idf_macro_matches

    changed = IDF_BUILD_CMAKE.replace(
        "include(${sdkconfig_cmake})", "include(${sdkconfig_cmake} NEW_ARG)"
    )
    assert idf_macro_matches(_write_idf_build_cmake(tmp_path, changed)) is False