src/encoding/text: Encode Info metric labels

Author: mxinden

CHANGELOG.md

@@ -4,8 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [0.11.0] - 2021-06-08
+## [0.11.1] - 2021-06-08
+### Fixed
+- Encode Info metric labels.
 
+## [0.11.0] - 2021-06-08
+### Added
 - Add support for OpenMetrics Info metrics (see [PR 18]).
 
 [PR 18]: https://github.com/mxinden/rust-open-metrics-client/pull/18

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "open-metrics-client"
-version = "0.11.0"
+version = "0.11.1"
 authors = ["Max Inden <mail@max-inden.de>"]
 edition = "2018"
 description = "Open Metrics client library allowing users to natively instrument applications."

src/encoding/text.rs

@@ -551,6 +551,7 @@ where
 {
     fn encode(&self, mut encoder: Encoder) -> Result<(), std::io::Error> {
         encoder
+            .with_label_set(&self.0)
             .encode_suffix("info")?
             .no_bucket()?
             .encode_value(1u32)?
@@ -674,7 +675,7 @@ mod tests {
 
         let expected = "# HELP my_info_metric My info metric.\n".to_owned()
             + "# TYPE my_info_metric info\n"
-            + "my_info_metric_info 1\n"
+            + "my_info_metric_info{os=\"GNU/linux\"} 1\n"
             + "# EOF\n";
         assert_eq!(expected, String::from_utf8(encoded.clone()).unwrap());
 

src/metrics/info.rs

@@ -12,7 +12,7 @@ use crate::metrics::{MetricType, TypedMetric};
 ///
 /// let _info = Info::new(vec![("os", "GNU/linux")]);
 /// ```
-pub struct Info<S>(S);
+pub struct Info<S>(pub(crate) S);
 
 impl<S> Info<S> {
     pub fn new(label_set: S) -> Self {