feat: support kconfig in component manager

tools/test_build_system/test_component_manager.py

@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: 2022-2024 Espressif Systems (Shanghai) CO LTD
+# SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
 # SPDX-License-Identifier: Apache-2.0
 import os.path
 from pathlib import Path
@@ -44,3 +44,115 @@ def test_trimmed_components_still_passed_to_cmake(idf_py: IdfPyFunc, test_app_co
         fs = f.read()
 
     assert '  example/cmp:' in fs
+
+
+class TestOptionalDependencyWithKconfig:
+    def test_direct_kconfig(self, idf_py: IdfPyFunc, test_app_copy: Path) -> None:
+        (test_app_copy / 'main' / 'idf_component.yml').write_text("""
+        dependencies:
+            example/cmp:
+              version: "*"
+              rules:
+                - if: $CONFIG{BOOTLOADER_PROJECT_VER} == 1
+            """)
+
+        idf_py('reconfigure')
+
+        with open('dependencies.lock', 'r') as f:
+            fs = f.read()
+        assert '  example/cmp:' in fs
+
+        (test_app_copy / 'main' / 'idf_component.yml').write_text("""
+        dependencies:
+            example/cmp:
+              version: "*"
+              rules:
+                - if: $CONFIG{BOOTLOADER_PROJECT_VER} != 1
+            """)
+
+        idf_py('reconfigure')
+
+        with open('dependencies.lock', 'r') as f:
+            fs = f.read()
+        assert '  example/cmp:' not in fs
+
+    def test_missing_kconfig_first_round(self, idf_py: IdfPyFunc, test_app_copy: Path) -> None:
+        (test_app_copy / 'main' / 'idf_component.yml').write_text("""
+        dependencies:
+          espressif/mdns:
+            version: "*"
+
+          example/cmp:
+            version: "*"
+            rules:
+              - if: $CONFIG{MDNS_MAX_SERVICES} == 10 # mdns kconfig CONFIG_MDNS_MAX_SERVICES default to 10
+            """)
+
+        idf_py('reconfigure')
+
+        with open('dependencies.lock', 'r') as f:
+            fs = f.read()
+        assert '  example/cmp:' in fs
+
+    def test_kconfig_load_existing_sdkconfig_defaults(self, idf_py: IdfPyFunc, test_app_copy: Path) -> None:
+        (test_app_copy / 'main' / 'idf_component.yml').write_text("""
+        dependencies:
+          example/cmp:
+            version: "*"
+            rules:
+              - if: $CONFIG{BOOTLOADER_LOG_LEVEL_WARN} == True
+            """)
+
+        (test_app_copy / 'sdkconfig.defaults').write_text("""
+            CONFIG_BOOTLOADER_LOG_LEVEL_WARN=y
+            CONFIG_LOG_DEFAULT_LEVEL_WARN=y
+        """)
+
+        idf_py('reconfigure')
+
+        with open('dependencies.lock', 'r') as f:
+            fs = f.read()
+        assert '  example/cmp:' in fs
+
+    def test_kconfig_load_missing_sdkconfig_defaults(self, idf_py: IdfPyFunc, test_app_copy: Path) -> None:
+        (test_app_copy / 'main' / 'idf_component.yml').write_text("""
+        dependencies:
+          espressif/mdns:
+            version: "*"
+
+          example/cmp:
+            version: "*"
+            rules:
+              - if: $CONFIG{MDNS_MAX_SERVICES} == 30 # mdns kconfig CONFIG_MDNS_MAX_SERVICES default to 10
+            """)
+
+        (test_app_copy / 'sdkconfig.defaults').write_text("""
+            CONFIG_MDNS_MAX_SERVICES=30
+        """)
+
+        idf_py('reconfigure')
+
+        with open('dependencies.lock', 'r') as f:
+            fs = f.read()
+        assert '  example/cmp:' in fs
+
+    def test_missing_kconfig_second_round(self, idf_py: IdfPyFunc, test_app_copy: Path) -> None:
+        (test_app_copy / 'main' / 'idf_component.yml').write_text("""
+        dependencies:
+          espressif/mdns:
+            version: "*"
+
+          example/cmp:
+            version: "*"
+            rules:
+              - if: $CONFIG{OF_COURSE_NO_ONE_USE_FOO} == "bar"
+            """)
+
+        res = idf_py('reconfigure', check=False)
+
+        assert res.returncode != 0
+        assert (
+            f'OF_COURSE_NO_ONE_USE_FOO, introduced by example/cmp, '
+            f'defined in {str(test_app_copy / "main" / "idf_component.yml")}' in res.stderr
+        )
+        assert 'Missing required kconfig option after retry.' in res.stderr