promformat is a small utility library to help formatting Prometheus metrics.
In most cases exposing Prometheus metrics in Rust can be easily done using the prometheus crate, using global counters registered as lazy_static!s or similar tricks. However this can have potential downsides to some use cases.
For example, you may want to set and unset metrics based on varying conditions, or register/unregister specific label sets. Such a task is tricky and cumbersome to achieve in the prometheus crate.
Using promformat is pretty straightforward:
use promformat::Metrics;
let mut metrics = Metrics::new();
let mut gauge1 = metrics.gauge("gauge_1", "Some gauge help text here");
gauge1.label("label1", "value1").label("label2", "value2").set(100);
let rendered = metrics.render();promformat is licensed under the Apache 2.0 license