The BuildCache.Parent field was removed in API v1.42 in [moby@e0db820].
While we had to keep the Go struct field around to backfill the field for
older API versions, it's no longer part of API v1.42 and up (using the
"omitempty" is just an implementation detail).
Older clients unconditionally use the `Parents` field if set, and usage
of this field is very limited, so let's remove the field without back-
filling, and have clients use the replacement field;
https://github.com/docker/cli/blob/v28.5.1/cli/command/formatter/buildcache.go
[moby@e0db820]: e0db8207f3
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The present content size is included in the image size usage and should
be included in the total size that the layer takes up on disk.
This prevents an issue where the reclaimable amount reported by the CLI
was a negative number.
This also updates the `/system/df` endpoint to use a new type that
computes information that was previously computed by the CLI. Computing
these in the server should require less work from the CLI and ensure
the calculations are more accurate because the CLI doesn't have to
reconstruct the numbers.
Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>
