NixOS/nix

C API: Logging callbacks

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#11,036 opened on Jul 4, 2024

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c apifeaturegood first issueidea approved

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Description

It would be ideal to have isolated logging streams that would be associated with either an evaluator state, or store, or a context. By logs I mean output from builtins.trace and from builders.

At the moment it would be a nice feature for me but if I find I really need it then I might attempt to implement it myself.

Priorities

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Contributor guide

Research direction
Investigate current logging in Nix evaluator, identify places where log output is emitted, and design a callback mechanism in the C API to intercept those logs.
Tech stack
cpp
Domain
backendapi
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitC++
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30