jib cache metadata-v2.json seems to grow without bound

[briandealwis]

$ cd ~/Library/Application\ Support/google-cloud-tools-java/jib

$ ls -1 *.tar.gz | wc -l
      15

$ jq '.layers[].reference.digest' metadata-v2.json | wc -l
313

$ jq '.layers[].reference.digest' metadata-v2.json | sort -u | wc -l
13

[coollog]

Ah nice catch! Looks like we might have a bug in our cache writing system that is not detecting previous entries that are the same.

[chanseokoh]

Fortunately looks like it's just the JSON entries that we missed de-duplication. The TAR files are unique.