Raise the maximum size limit for the dockerfile and correct the size
check. The size check was intended to use the size attribute from the
file stat, but the original gogo version confused the `Size()`
method (which returned the size of the proto message) with the `Size`
attribute (which was named `Size_`).
During the conversion, we noticed the mistake but kept the incorrect
behavior for the sake of keeping the conversion simple.
This also raises the maximum limit because 512 kB is likely a bit too
conservative. The limit has been raised to 2 MB and the limit has been
included in the error message.
Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>
Removes gogo/protobuf from buildx and updates to a version of
moby/buildkit where gogo is removed.
This also changes how the proto files are generated. This is because
newer versions of protobuf are more strict about name conflicts. If two
files have the same name (even if they are relative paths) and are used
in different protoc commands, they'll conflict in the registry.
Since protobuf file generation doesn't work very well with
`paths=source_relative`, this removes the `go:generate` expression and
just relies on the dockerfile to perform the generation.
Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>
