Renaming metrics with match_type Regex?

[na-wu]

Curious if there's a way to dynamically rename metrics matched by regex in the same deterministic way it's done via glob matching

For example:

- match: "old.metric1.*.*.*"
   name: "new_metric_name_${1}_${2}_${3}"

What I mean by deterministic is that we know how many wildcards are matched, so I know how many variables I can use

My question is whether the same can be done with Regex when the number of matching wildcards is unknown, for example:

- match: "old(\\.(\\w+)+)"
   match_type: regex

should match
old.metric
old.metric.var1
old.metric.var1.var2

I want to rename these metrics to
new_metric
new_metric_var1
new_metric_var1_var2

Is this possible?

Thanks

[matthiasr]

There is no way to do this currently. To be honest, I am learning today that unbounded match groups are possible 😂

I would like to avoid reinventing syntax for this. Is there an example of regular expression "search and replace" that supports this?