treefile: Support variable substitution in metadata
#5165
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I want to stop abusing the `rojig` key in the CoreOS treefiles. But before we can switch over to `metadata`, we need variable substitution supported there too. Note the `metadata` key can have arbitrarily nested values. For now, we just implement variable substitution for the first level of values since that's all we need.
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cgwalters
approved these changes
Nov 17, 2024
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I want to stop abusing the
rojigkey in the CoreOS treefiles. But before we can switch over tometadata, we need variable substitution supported there too.Note the
metadatakey can have arbitrarily nested values. For now, we just implement variable substitution for the first level of values since that's all we need.