Here is the latest OCaml Weekly News, for the week of January 16 to 23, 2018.
Archive: https://discuss.ocaml.org/t/using-lwt-log-library-for-sending-messages-to-a-syslog-server/1432/2Deep in this thread, Hannes Mehnert said:
since you mention my logs-syslog package here, let me answer you . ;) - Lwt_logs now moved to a separate repository (see https://github.com/ocsigen/lwt/issues/468 and https://github.com/ocsigen/lwt/pull/484). NB: I never used Lwt_logs and can't answer your initial question about syslog support. - logs-syslog "depends on lot of external libraries": my perception is different, it requires `ocamlfind`, `ocamlbuild`, and `topkg` for building, plus `logs`, `ptime`, and `syslog-message` (which itself depends additionally on `astring`) at runtime. The [logs library](http://erratique.ch/software/logs/doc/Logs.html#basics) is very convenient to use IMHO, and has builtin support for both terminal, but also browser console (when cross-compiling to JS). I wrote logs-syslog to solve the exact problem - exfiltrating log messages via syslog - once logs was adopted more widely (at least by the MirageOS community, see https://mirage.io/blog/announcing-mirage-30-release#Logs-Where-You-Want-Them). Others (at Docker) wrote reporters for both [Apply system log](https://github.com/mirage/ocaml-asl) and [Windows event log](https://github.com/djs55/ocaml-win-eventlog). The syslog-message library does not yet support structured syslog ([RFC 5424](https://tools.ietf.org/html/rfc5424)), apart from that the logs-syslog library supports three transports, UDP, TCP, TLS (including client authentication) - and 3 backends: Unix (OCaml stdlib), Lwt, MirageOS. Please let me know if you have a specific use case not covered by logs-syslog. Further reading about the MirageOS syslog integration is available at https://hannes.nqsb.io/Posts/Syslog
Archive: https://discuss.ocaml.org/t/ann-sequence-1-0/1441/1Simon Cruanes announced:
I have the pleasure to announce that [sequence](https://github.com/c-cube/sequence) has reached its version 1.0. Sequence is a lightweight, high-performance library of iterators that is compatible with existing `iter` functions. Sequence 1.0 is a breaking release that comes with some simplification of the API and a bump of the minimum supported OCaml version to 4.02 that comes from jbuilder. [Short tutorial to see what Sequence is about](https://github.com/c-cube/sequence#short-tutorial) Online doc at https://c-cube.github.io/sequence/ Repo at https://github.com/c-cube/sequenceHezekiah Carty then asked:
This is great, thank you! Is there a writeup somewhere on how to pick between sequence and [gen](https://github.com/c-cube/gen)? Both seem similar in intent. Is one generally a better choice than the other?Simon Cruanes replied:
I just wrote a basic explanation here: https://github.com/c-cube/sequence#comparison-with-a-href-https-github-com-c-cube-gen-gen-a . I'll try to expand it if it's not clear enough.
Archive: https://sympa.inria.fr/sympa/arc/caml-list/2018-01/msg00045.htmlDamien Doligez announced:
The release of OCaml version 4.06.1 is imminent. We have created a release candidate for your testing pleasure. Please try it and let me know whether it works for you. We want to know about any show-stopping bugs, especially in the compilation and installation phases. This release candidate is available as an opam switch: opam switch 4.06.1+rc1 Happy hacking, -- Damien Doligez for the OCaml team. 4.06.1 ------ ### Bug fixes - MPR#7661, GPR#1459: fix faulty compilation of patterns using extensible variants constructors (Luc Maranget, review by Thomas Refis and Gabriel Scherer, report by Abdelraouf Ouadjaout and Thibault Suzanne) - MPR#7702, GPR#1553: refresh raise counts when inlining a function (Vincent Laviron, Xavier Clerc, report by Cheng Sun) - MPR#7704, GPR#1559: Soundness issue with private rows and pattern-matching (Jacques Garrigue, report by Jeremy Yallop, review by Thomas Refis) - MPR#7705, GPR#1558: add missing bounds check in Bigarray.Genarray.nth_dim. (Nicolás Ojeda Bär, report by Jeremy Yallop, review by Gabriel Scherer) - GPR#1470: Don't commute negation with float comparison (Leo White, review by Xavier Leroy) - GPR#1538: Make pattern matching compilation more robust to ill-typed columns (Gabriel Scherer and Thomas Refis, review by Luc Maranget)
Archive: https://discuss.ocaml.org/t/ann-containers-2-0-alpha1/1454/1Simon Cruanes announced:
I have the pleasure to announce that containers 2.0+alpha1 is being released. [containers](https://github.com/c-cube/ocaml-containers) is a modular, ightweight, and performant extension of the standard library. Version 2.0 introduces a monomorphic mode (thanks to @jpdeplaix) that is designed to prevent errors caused by the polymorphic "magic" operators such as `(=)`. This breaking release is also the occasion to switch to dune, and to fix some inconsistencies in the API (mostly printers). If you use containers, please give a try to 2.0+alpha1 and report any issue on the bucktracker! tag: https://github.com/c-cube/ocaml-containers/releases/tag/2.0%2Balpha1 changelog: https://github.com/c-cube/ocaml-containers/blob/2.0%2Balpha1/CHANGELOG.adoc
Here is a sneak peek at some potential future features of the Ocaml compiler, discussed by their implementers in these Github Pull Requests. - stdlib: add Pervasives.int_size https://github.com/ocaml/ocaml/pull/1572 - MPR#7710: ocamldep -sort: treat cyclic dependencies as an error https://github.com/ocaml/ocaml/pull/1578
Here are links from many OCaml blogs aggregated at OCaml Planet, http://ocaml.org/community/planet/. Full Time: Compiler Engineer at Jane Street in New York & London http://jobs.github.com/positions/9e8ba450-e72e-11e7-926f-6ce07b7015c8 Full Time: Software Developer (Functional Programming) at Jane Street in New York, NY; London, UK; Hong Kong http://jobs.github.com/positions/0a9333c4-71da-11e0-9ac7-692793c00b45
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