Abusing text/template for data transformation
summary
A small pipeline transforms raw GitHub webhooks and API payloads into concise typed JSON using a forked text/template as a DSL that returns interface values instead of strings. Templates handle tests, range loops and user functions (example: TOML configuration drives mappings and a userdata function enriches logins with employer/maintainer info). Output goes into Elasticsearch and Kibana for dashboards; the tool is open source and used successfully to build those dashboards.
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