check has_apple_developer_tools? before calling functions like llvm_build_version/clang_build_version in brew --config
check has_apple_developer_tools? before calling functions like llvm_build_version/clang_build_version in brew --config

woodruffw/homebrew-test,woodruffw/homebrew-test,woodruffw/homebrew-test,woodruffw/homebrew-test