27 lines
852 B
Python
27 lines
852 B
Python
# Copyright (c) Meta Platforms, Inc. and affiliates.
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#
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# This source code is licensed under both the MIT license found in the
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# LICENSE-MIT file in the root directory of this source tree and the Apache
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# License, Version 2.0 found in the LICENSE-APACHE file in the root directory
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# of this source tree.
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load(
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"@prelude//utils:utils.bzl",
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"expect",
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)
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_DEFAULT_FMT = "found different values for key \"{0}\": {} != {}"
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def update_x(dst: {"_a": "_b"}, k: "_a", v: "_b", fmt = _DEFAULT_FMT):
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p = dst.setdefault(k, v)
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expect(p == v, fmt, k, p, v)
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def merge_x(dst: {"_a": "_b"}, src: {"_a": "_b"}, fmt = _DEFAULT_FMT):
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for k, v in src.items():
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update_x(dst, k, v, fmt = fmt)
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def flatten_x(ds: [{"_a": "_b"}], fmt = _DEFAULT_FMT) -> {"_a": "_b"}:
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out = {}
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for d in ds:
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merge_x(out, d, fmt = fmt)
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return out
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