Dear Hop devs,
Pull request 4761 <https://github.com/apache/hop/pull/4761> contains a
plugin system to resolve variable expressions using 'variable resolvers'.
A description of the system is here
<https://github.com/apache/hop/blob/a394f68d003fec95f5016ac2ff74734aec119ebc/docs/hop-user-manual/modules/ROOT/pages/metadata-types/variable-resolver/index.adoc>
.
In short, if you have an expression like #{name:key:value} whenever you
resolve a variable, the following takes place:
- Name is looked up in the "Variable Resolver" metadata elements
- This metadata wraps around plugins capable of resolving variables
- The metadata element details allow the actual key to be looked up,
typically a JSON document from a secrets store.
- The appropriate value is picked from the secret.
Currently there are 3 plugins available:
1. a Pipeline variable resolver capable of anything really
2. a Google Secret Manager resolver
3. a Hashicorp Vault secret manager
If you have the time, your feedback on the PR is appreciated to make sure
we're not overlooking any obvious issues.
Thanks in advance,
Matt
