File content as of revision 3:1198227e6421:

{
    "b1": {
        "extra_labels": [],
        "default_lib": "std",
        "core": "Cortex-M0",
        "config": {
            "base1_1": "v_base1_1_b1",
            "base1_2": "v_base1_2_b1",
            "base1_3": "v_base1_3_b1"
        }
    },
    "d1": {
        "inherits": ["b1"],
        "config": {
            "derived1": "v_derived1_d1",
            "derived2": "v_derived2_d1"
        },
        "overrides": {
            "base1_1": "v_base1_1_d1",
            "base1_2": "v_base1_2_d1"
        }
    },
    "b2": {
        "inherits": ["b1"],
        "config": {
            "base2_1": "v_base2_1_b2",
            "base2_2": "v_base2_2_b2"
        },
        "overrides": {
            "base1_2": "v_base1_2_b2"
        }
    },
    "f": {
        "inherits": ["d1", "b2"],
        "config": {
            "f1_1": "v_f1_1_f",
            "f1_2": "v_f1_2_f"
        },
        "overrides": {
            "base2_1": "v_base2_1_f",
            "base1_1": "v_base1_1_f",
            "derived2": "v_derived2_f",
            "f1_1": "v_f1_1_f_override"
        }
    }
}