Basic YAML map merging suitable for merging a default map with an overriding one.
The semantics favor the overrider with a twist to support a short-hand for lists that stand-in for maps of scalars to booleans. Specifically, lint rules can be enumerated as a list or as a map. To make this work, lists can be "promoted" to maps. In particular, if
linter:
rules:
- camel_case_types
- one_member_abstracts
is merged with
linter:
rules:
one_member_abstracts: false
always_specify_return_types: true
the right thing is done to get us to:
linter:
rules:
camel_case_types: true
one_member_abstracts: false
always_specify_return_types: true
R=brianwilkerson@google.com, johnmccutchan@google.com
Review URL: https://codereview.chromium.org/1425393002 .
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67dc108f39