feat: lake: local package overrides #6411
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This PR adds the ability to override package entries in a Lake manifest via a separate JSON file. This file can be specified on the command line with
--packages
or applied persistently by placing it at.lake/package-overrides.json
.The overrides file is a subset of
lake-manifest.json
with just a version and apackages
field. The entries in the package share the syntax of the manifest file and take precedence over the entries there. Lake loads the entries from the manifest, then overrides them with those in.lake/package-overrides.json
(if any) and then those in any file passed to--packages
.