package prometheus

v1.3 (2025-12-08)

• Make help / type information be OpenMetrics compatible (@Nymphium @tmcgilchrist #47). e.g. using # TYPE rather than #TYPE in the output.
• Minor documentation fixes (@tmcgilchrist @vch9 #50 #53).
• Make default Makefile target run tests (@talex5 #49).

v1.2 (2022-06-16)

• Add lwt collectors and pre-collectors (@killian-delarue, #43). Note that this is a temporary feature while we wait for OCaml 5 to be released, when this can be replaced by the use of effects.
• Fix deprecations in Fmt 0.8.10 (@MisterDA, #36).
• General build updates, upstream deprecations, etc (@talex5, #33 #34 #35 #40 #42).

v1.1 (2021-06-08)

• Allow using a custom formatter for log output (@MisterDA #31). Windows services crash if they try to use stderr.

v1.0 (2020-12-22)

• Add logging configuration (#29, @talex5). To configure a server to report counts for log messages:

  let () = Prometheus_unix.Logging.init ()

  This installs a reporter that reports the number of messages logged by each log source and at each level. The reporter also displays the timestamp and log source with each message, which is a more suitable configuration for servers.

• Add bounds on cohttp to prepare for cohttp 3 release (#28, @talex5).

v0.7 (2020-03-03)

• switch float representation to OCaml's default "%f" (#22, @toots)
• use Gc.quick_stat for faster stats (#25, @talex5)

v0.6 (2019-11-23)

• upgrade build to dune (@talex5)
• upgrade to opam2 format (@talex5)

v0.5 (2017-12-20)

• prometheus-app: update to cohttp.1.0.0 API (#15, @djs55)
• add support for histograms (#14, @stijn-devriendt and @talex5)
• add Sample_set module to clean up the API a bit (#13, @talex5)
• fix gettimeofday parameter not used in favor of Unix.gettimeofdaya (#12, @stijn-devriendt)

v0.4 (2017-08-02)

• unix: update to cohttp >= 0.99.0. Note this means the unix package requires OCaml 4.03+. The main library still only requires OCaml 4.01+

v0.3 (2017-07-03)

• Build tweaks to support topkg versioning (@avsm)

v0.2 (2017-05-18)

• add example program and update README
• switch to jbuilder
• throw a clearer error on registering a duplicate metric
• use Re rather than Str

v0.1

• Initial release.