daml ledger export: feature request - export ALL parties

[maxdeliso-da]

Working with the ledger export tool, I would like to be able to export the entirety of the ledger contents, without having to enumerate the relevant parties myself.

It's possible to add this feature from the outside, using shellscripts:

daml ledger export script --host localhost --port 6865 --sdk-version 0.0.0 --output out/test --party $(daml ledger list-parties --host localhost --port 6865 --json | jq '.[] | .party' | awk '{printf "%s%s", NR==1?"":",", $1;'} | tr -d '"' | tr -d '\r')

I think it's enough of a common use case that it's fair to request it in the tool proper.

Could there be an --allParties flag added?