metricgen

metricgen is a lightweight helper that emits typed Go boilerplate for IBM.D modules. It reads the same contexts/contexts.yaml file used by docgen and produces strongly typed setters or utility structs that make it easier to export metrics without hand-writing repetitive code.

Usage example (from a module directory):

//go:generate go run ../../metricgen \
//          -module=db2 \
//          -contexts=contexts/contexts.yaml \
//          -out=contexts/zz_generated_contexts.go

The generated file is committed to source control and used by the collector:

• Adds typed Set helpers for every context/dimension
• Exposes label structs for dynamic charts
• Keeps naming synchronized with contexts.yaml

You can extend the tool if a module needs additional scaffolding, but in most cases the default output is sufficient.