fix(cmakev2/kconfig): remove --env-file argument from base kconfgen command

The current base kconfgen command is stored in the __BASE_KCONFGEN_CMD
build property, and it includes the --env-file option pointing to the
`build/config.env` file. The `build/config.env` file does not separate
component configuration files into included and excluded components,
because it is created before any executable is added and we need it for
the initial sdkconfig generation. The global `build/config.env` can be
used for every sdkconfig format (cmake, json, txt), but not for the
kconfig_menus.json format, because kconfig_menus.json relies on the
Kconfig layout and hierarchy. Let's allow specifying the --env-file for
each kconfgen invocation and remove it from the base kconfgen command.
This allows you to specify an --env-file for each executable, each with
its own config.env file.

Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>

tools/cmakev2/kconfig.cmake

@@ -588,7 +588,6 @@ function(__create_base_kconfgen_command sdkconfig sdkconfig_defaults)
     idf_build_get_property(python PYTHON)
     idf_build_get_property(root_kconfig __ROOT_KCONFIG)
     idf_build_get_property(root_sdkconfig_rename __ROOT_SDKCONFIG_RENAME)
-    idf_build_get_property(config_env_path __CONFIG_ENV_PATH)
     idf_build_get_property(target IDF_TARGET)
 
     # Set up defaults arguments
@@ -609,8 +608,7 @@ function(__create_base_kconfgen_command sdkconfig sdkconfig_defaults)
         --sdkconfig-rename "${root_sdkconfig_rename}"
         --config "${sdkconfig}"
         ${defaults_args}
-        --env "IDF_BUILD_V2=y"
-        --env-file "${config_env_path}")
+        --env "IDF_BUILD_V2=y")
 
     # Store base command as a build property
     idf_build_set_property(__BASE_KCONFGEN_CMD "${base_kconfgen_cmd}")
@@ -627,6 +625,7 @@ function(__run_kconfgen)
     idf_build_get_property(base_kconfgen_cmd __BASE_KCONFGEN_CMD)
     idf_build_get_property(kconfgen_outputs_cmd __KCONFGEN_OUTPUTS_CMD)
     idf_build_get_property(sdkconfig SDKCONFIG)
+    idf_build_get_property(config_env_path __CONFIG_ENV_PATH)
 
     # Create full command with output file paths
     set(kconfgen_cmd ${base_kconfgen_cmd} ${kconfgen_outputs_cmd})
@@ -634,6 +633,7 @@ function(__run_kconfgen)
     idf_dbg("Running kconfgen: ${kconfgen_cmd}")
     execute_process(
         COMMAND ${kconfgen_cmd}
+        --env-file "${config_env_path}"
         RESULT_VARIABLE kconfgen_result
     )
 
@@ -736,6 +736,7 @@ function(idf_create_menuconfig executable)
         --env "IDF_INIT_VERSION=${idf_init_version}"
         --dont-write-deprecated
         ${kconfgen_outputs_cmd}
+        --env-file "${config_env_dir}/config.env"
         # Check terminal capabilities
         COMMAND ${python} "${idf_path}/tools/check_term.py"
         # Run menuconfig
@@ -758,6 +759,7 @@ function(idf_create_menuconfig executable)
         --env "IDF_ENV_FPGA=${idf_env_fpga}"
         --env "IDF_INIT_VERSION=${idf_init_version}"
         ${kconfgen_outputs_cmd}
+        --env-file "${config_env_dir}/config.env"
         USES_TERMINAL
         COMMENT "Running menuconfig..."
     )
@@ -802,6 +804,7 @@ endfunction()
 #]]
 function(idf_create_save_defconfig)
     idf_build_get_property(prepare_cmd __PREPARE_KCONFIG_CMD)
+    idf_build_get_property(config_env_path __CONFIG_ENV_PATH)
     idf_build_get_property(kconfgen_cmd __BASE_KCONFGEN_CMD)
 
     add_custom_target(save-defconfig
@@ -811,6 +814,7 @@ function(idf_create_save_defconfig)
         COMMAND ${kconfgen_cmd}
         --dont-write-deprecated
         --output savedefconfig "${CMAKE_SOURCE_DIR}/sdkconfig.defaults"
+        --env-file "${config_env_path}"
         USES_TERMINAL
         COMMENT "Saving defconfig..."
         VERBATIM