## 1.13.0 / 2022-08-06

[bwplotka]

• [CHANGE] Minimum required Go version is now 1.17 (we also test client_golang against the new 1.19 version).
• [ENHANCEMENT] Added prometheus.TransactionalGatherer interface for promhttp.Handler use which allows using low allocation update techniques for custom collectors. Added Transactional Gatherer allowed cached solutions #989
• [ENHANCEMENT] Added exemplar support to prometheus.NewConstHistogram. See ExampleNewConstHistogram_WithExemplar example on how to use it. Add exemplar support for const histogram #986
• [ENHANCEMENT] prometheus/push.Pusher now has context-aware methods that pass context to HTTP requests. push: Add PushContext and AddContext to Pusher #1028
• [ENHANCEMENT] prometheus/push.Pusher has now Error method that retrieve last error. Add Error API for pusher #1075
• [ENHANCEMENT] testutil.GatherAndCompare provides now readable diff on failed comparisons. smart diff to testutil.GatherAndCompare #998
• [ENHANCEMENT] Query API now supports timeouts. Update query API to support timeouts #1014
• [ENHANCEMENT] New MetricVec method DeletePartialMatch(labels Labels) for deleting all metrics that match provided labels. Implement deletion based on partially matching labels #1013
• [ENHANCEMENT] api.Config now accepts passing custom *http.Client. client: Allow configuration of http client #1025
• [BUGFIX] Raise exemplar labels limit from 64 to 128 bytes as specified in OpenMetrics spec. Raise exemplar labels limit from 64 to 128 #1091
• [BUGFIX] Allow adding exemplar to +Inf bucket to const histograms. explicitly add +inf bucket in withExemplarsMetric #1094
• [ENHANCEMENT] Most promhttp.Instrument* middlewares now support adding exemplars to metrics. This allows hooking those to your tracing middleware that retrieves trace ID and puts it in exemplar if present. Added exemplar support to http middleware. #1055
• [ENHANCEMENT] Added testutil.ScrapeAndCompare method. testutil: Add ScrapeAndCompare #1043
• [BUGFIX] Fixed GopherJS build support. Fix build against GopherJS #897
• [ENHANCEMENT] ⚠️ Added way to specify what runtime/metrics collectors.NewGoCollector should use. See ExampleGoCollector_WithAdvancedGoMetrics. collectors.GoCollector: Added rule support for granular metric configuration. #1102

New Contributors ❤️

• @alissa-tung made their first contribution in Fix deprecated NewBuildInfoCollector API #1000
• @wperron made their first contribution in Add exemplar support for const histogram #986
• @zhijian-pro made their first contribution in When prefix is empty, no more dots should be written #1005
• @dohnto made their first contribution in Refactor apiClientImpl.DoGetFallback #1021
• @tatsuhiro-t made their first contribution in push: Add PushContext and AddContext to Pusher #1028
• @sourikghosh made their first contribution in smart diff to testutil.GatherAndCompare #998
• @josephwoodward made their first contribution in Update query API to support timeouts #1014
• @stone-z made their first contribution in Implement deletion based on partially matching labels #1013
• @yolossn made their first contribution in client: Allow configuration of http client #1025
• @xrstf made their first contribution in update branch names in a few links #1039
• @dependabot made their first contribution in Bump github.com/prometheus/common from 0.33.0 to 0.34.0 #1051
• @sazary made their first contribution in Enable same linters as the Prometheus repo itself #1056
• @oiooj made their first contribution in Add Error API for pusher #1075
• @fredr made their first contribution in Update documentation for exemplar label limit #1095
• @inosato made their first contribution in Remove ioutil #1096
• @arun-shopify made their first contribution in explicitly add +inf bucket in withExemplarsMetric #1094
• @paralin made their first contribution in Fix build against GopherJS #897

Full Changelog: v1.12.1...v1.13.0

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This discussion was created from the release ## 1.13.0 / 2022-08-06.

[hairyhenderson]

I'm unable to use v1.13.0 due to #1117 - can we get a v1.13.1 released soon with the fix (#1118) which was merged over a month ago?