prometheus/prometheus
promql: option to preserve comments in parser
Aberta
#15.871 aberto em 28 de jan. de 2025
component/promqlhelp wantedkind/featurenot-as-easy-as-it-lookspriority/P3
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Description
Proposal
I have a requirement to analyse and modify promql expressions to enforce some business-specific rules. This is being achieved by parsing to the AST, analysing the tree through traversal, and optionally applying modifications to the AST before rendering it back to a string.
Comments are currently stripped in this process by a hard-coded skip in the parser.
We would like this to be an option somewhere so that we can preserve these comments through the parse->AST->string process, as these comments can contain useful debugging/tracing information provided by the original query issuer.