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J. Nick Koston
45525c8a82
Three fixes so 'script/cpp_unit_test.py api' actually compiles instead
of crashing in build setup:
1. script/build_helpers.py: when adding transitive component
dependencies to the post-validation config, use {} (dict) instead
of [] (list) for non-MULTI_CONF components. socket's
FILTER_SOURCE_FILES (and any other code that subscripts
CORE.config[component] with a string key) was crashing because
socket got config = [] from setdefault.
2. esphome/components/api/api_pb2_service.cpp + the codegen in
script/api_protobuf/api_protobuf.py: wrap the generated
APIConnection::read_message_ definition in #ifdef USE_API. The
class itself is only declared inside #ifdef USE_API in
api_connection.h, so without the guard the .cpp fails to compile
in any build that pulls in the api source files without setting
USE_API (e.g. cpp unit tests of api dependencies).
