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X-IronPort-Anti-Spam-Filtered: true X-IronPort-AV: E=Sophos;i="5.92,209,1650924000"; d="scan'208,217";a="17355175" X-MGA-submission: =?us-ascii?q?MDG4320apt3vbRD5kni08mP1r8QM1QEmlt4lVb?= =?us-ascii?q?qyO1VHE0lhoIrZUv4biuqio72WP+fGok6pzmI1TrrpZNQQzqc9asQtyM?= =?us-ascii?q?b/6DqswMSL6GwlcY5Q00gUoh0y20SVzI3fFZfX+bf415RbRjvQiyhVpE?= =?us-ascii?q?GsO6/ujlXGKnO4bPkVenLuKg=3D=3D?= Received: from mx1.polytechnique.org ([129.104.30.34]) by mail3-smtp-sop.national.inria.fr with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Jun 2022 10:06:53 +0200 Received: from set (set.irisa.fr [131.254.10.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ssl.polytechnique.org (Postfix) with ESMTPSA id DF27C564837; Tue, 21 Jun 2022 10:06:50 +0200 (CEST) From: Alan Schmitt To: "lwn" , "cwn" , caml-list@inria.fr Date: Tue, 21 Jun 2022 10:06:34 +0200 Message-ID: <87v8suwid1.fsf@m4x.org> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="=-=-=" X-AV-Checked: ClamAV using ClamSMTP at svoboda.polytechnique.org (Tue Jun 21 10:06:51 2022 +0200 (CEST)) X-Spam-Flag: No, tests=bogofilter, spamicity=0.073900, queueID=68F5E564A06 X-Org-Mail: alan.schmitt.1995@polytechnique.org Subject: [Caml-list] Attn: Development Editor, Latest OCaml Weekly News Reply-To: Alan Schmitt X-Loop: caml-list@inria.fr X-Sequence: 18806 Errors-To: caml-list-owner@inria.fr Precedence: list Precedence: bulk Sender: caml-list-request@inria.fr X-no-archive: yes List-Id: List-Help: List-Subscribe: List-Unsubscribe: List-Post: List-Owner: List-Archive: Archived-At: --=-=-= Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hello Here is the latest OCaml Weekly News, for the week of June 14 to 21, 2022. Table of Contents =E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2= =94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94= =80 OBazl Toolsuite - tools for building OCaml with Bazel Job offer: 3 years compiler engineer at the French tax authority OCaml 5.0, zeroth alpha release Tezt, a framework for all your tests OCaml Stdlib, Containers, Batteries, Base and F# core functions comparisons Dune 3.3.0 Old CWN OBazl Toolsuite - tools for building OCaml with Bazel =E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2= =95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95= =90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90= =E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2= =95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95= =90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90= =E2=95=90=E2=95=90=E2=95=90 Archive: Gregg Reynolds announced =E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2= =94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94= =80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80 Version 2 of OBazl, a Bazel ruleset for building OCaml code, will soon be available. I'm letting you know early because I'll be giving a presentation about the OBazl Toolsuite for the [Bazel Exchange] conference next Wed, 22 June, at 3:00 pm UDT (10:00 am CDT). It's a virtual conference so you can tune in from anywhere. The talk will focus on some of the quirks of the OCaml build discipline and how I addressed them for the OBazl ruleset. The tools are usable now, they're just not yet properly documented and packaged, and in a few places there's a little more work to be done on the code. Nonetheless there is quite a bit of documentation (CAVEAT: some of it is outdated), with more on the way soon, and there are lots of demos available. So if you're interested in using Bazel to build your OCaml code I welcome you to take a look: [The OBazl Book] Twitter handle is @obazldev Discord: [https://discord.gg/PHSAW5DUva] [Bazel Exchange] [The OBazl Book] [https://discord.gg/PHSAW5DUva] Gregg Reynolds lated added =E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2= =94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94= =80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80= =E2=94=80 PS. The conference organizers have provided this discount token: BAZEL-GR-20 It should be good for 20% off, registration is at [https://events.skillsmatter.com/bazelx2022] [https://events.skillsmatter.com/bazelx2022] Job offer: 3 years compiler engineer at the French tax authority =E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2= =95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95= =90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90= =E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2= =95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95= =90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90= =E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2= =95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90 Archive: Denis Merigoux announced =E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2= =94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94= =80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80 [En fran=C3=A7ais parce que c'est une offre d'emploi dans l'administratio= n] Bonjour =C3=A0 toutes et =C3=A0 tous, Vous aimez la programmation fonctionnelle et les compilateurs ? Vous en avez marre des offres d'emploi dans la blockchain ? =C3=87a tombe bien, j'ai ce qu'il vous faut ! Il y a deux ans, j'ai lanc=C3=A9 un grand projet de modernisation du calc= ul informatique de calcul de l'imp=C3=B4t sur le revenu =C3=A0 la Direction G=C3=A9n=C3=A9rale des Finances Publiques (DGFiP), en partenariat avec In= ria: . Le logiciel au c=C5=93ur de ce projet de modernisation est Mlang, un compilateur =C3=A9crit en OCaml pour un couple de langages d=C3=A9di=C3= =A9s utilis=C3=A9s par la DGFiP pour encoder le calcul de l'imp=C3=B4t sur le revenu. Depuis deux ans, la DGFiP travaille =C3=A0 int=C3=A9grer Mlang =C3=A0 l'infrastr= ucture officielle de calcul de l'imp=C3=B4t sur le revenu pour remplacer des syst=C3=A8mes vieillissants. C'est donc un projet =C3=A0 tr=C3=A8s fort i= mpact (80M=E2=82=AC par d'imp=C3=B4ts par an), et proche de la R&D (OCaml, libre, innovation)= ! Depuis un an, la DGFiP emploie la soci=C3=A9t=C3=A9 OCamlPro sur le proje= t mais souhaite maintenant r=C3=A9-internaliser ses comp=C3=A9tences pour garder= la souverainet=C3=A9 num=C3=A9rique sur son infrastructure de calcul. C'est l=C3=A0 que cette offre d'emploi entre en jeu ! En effet la DGFiP vient d'ouvrir un poste en CDD de 3 ans pour un.e expert.e en compilation ! Les d=C3=A9tails : =E2=80=A2 Bureaux =C3=A0 Noisy-le-Grand (+ jusqu'=C3=A0 3 jours t=C3=A9l= =C3=A9travail/semaine) =E2=80=A2 Salaire: =C3=80 n=C3=A9gocier selon exp=C3=A9rience mais simila= ire =C3=A0 "Inspecteur des finances publiques". Selon le site du minist=C3=A8re de l'=C3=A9con= omie =C3=A7a d=C3=A9buterait =C3=A0 3k=E2=82=AC net/mois. =E2=80=A2 T=C3=A2ches: Maintenance, =C3=A9volution de Mlang et travaux an= nexes Et pour l'heureux.se recrut=C3=A9.e, la cerise sur le g=C3=A2teau sera de pouvoir collaborer avec moi et l'=C3=A9quipe Prosecco d'Inria (ainsi que Rapha=C3=ABl Monat, ) :) Attention cependant : il faudra s'attendre =C3=A0 devoir =C3=A9galement aider l'=C3=A9quipe de la DGFiP sur d'autres chanti= ers en fonction des priorit=C3=A9s. De m=C3=AAme, l'objectif est de partager la comp=C3=A9tence en compilation au sein de la DGFiP, donc les profils =C3=A9vang=C3=A9lisateurs de la programmation fonctionnelle sont les bien= venus ! Pour r=C3=A9f=C3=A9rence, voici l'offre officielle compl=C3=A8te: . S'il vous pla=C3=AEt, pas d'autocensure =C3=A0 cause de ce qui est marqu=C3=A9 dans ce PDF! Si vous= avez un doute contactez-moi par retour de mail. Deadline pour les candidatures: 9 juillet. Prise de poste inconnue, s=C3=BBrement aux alentours du 1er septembre mais j'imagine que c'est n=C3=A9gociable. Denis Merigoux later added =E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2= =94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94= =80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80= =E2=94=80 Si vous =C3=AAtes int=C3=A9ress=C3=A9.e, envoyez votre CV et lettre de mo= tivation =C3=A0 bureau.si-part-rh@dgfip.finances.gouv.fr et bureau.rh-mobilite-carriere-a-recrutementchoix@dgfip.finances.gouv.fr. OCaml 5.0, zeroth alpha release =E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2= =95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95= =90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90= =E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90 Archive: octachron announced =E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2= =94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94= =80=E2=94=80=E2=94=80 Five months after the initial merge of the multicore branch into the mainline OCaml and three months after the release of OCaml 4.14.0, OCaml 5.0.0 is starting to take shape. I am thus happy to announce an exceptional zeroth alpha release of OCaml 5.0.0 (see below for the installation instructions). This alpha release is expected to be rougher than an usual alpha release, due to the full rewrite of the OCaml runtime. In particular, the bytecode debugger will only be available in the next alpha release. Similarly, there will be some changes to the internal C runtime API and to the files installed by the compiler package in the next alpha release. Moreover, this zeroth alpha release is the occasion to remind everyone that OCaml 5.0 itself is expected to be a more experimental release than usual. Notably, the native compiler will only be available on the ARM64 and x86-64 architectures in this 5.0 release. Nevertheless, this zeroth alpha version is already stable enough for fellow hackers eager to join us in our early bug hunting and opam ecosystem fixing fun, or to venture in the new era of parallelism and (experimental) effects. You can follow the progresses in stabilising the opam ecosystem on A brief summary is that at least dune, merlin, ppxlib, utop, ocamlfind, and ocamlbuild work (potentially by using patches from the alpha opam repository). If you find any bugs, please report them here: In particular, any sequential OCaml 4 library or program should be valid in OCaml 5 (except for deprecated modules and functions). Please don't hesitate to report any compatibility bugs! If you are interested by the ongoing list of bug fixes, the updated change log for OCaml 5.0.0 is available at: Installation instructions =E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2= =95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95= =8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C =E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95= =E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2= =80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80= =95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95= =E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2= =80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80= =95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95= =E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2=80=95=E2= =80=95=E2=80=95=E2=80=95=E2=80=95 The base compiler can be installed as an opam switch with the following commands on opam 2.1: =E2=94=8C=E2=94=80=E2=94=80=E2=94=80=E2=94=80 =E2=94=82 opam update =E2=94=82 opam switch create 5.0.0~alpha0 =E2=94=94=E2=94=80=E2=94=80=E2=94=80=E2=94=80 For previous version of opam, the switch creation command line is slightly more verbose: =E2=94=8C=E2=94=80=E2=94=80=E2=94=80=E2=94=80 =E2=94=82 opam update =E2=94=82 opam switch create 5.0.0~alpha0 --repositories=3Ddefault,beta= =3Dgit+https://github.com/ocaml/ocaml-beta-repository.git =E2=94=94=E2=94=80=E2=94=80=E2=94=80=E2=94=80 If you want to tweak the configuration of the compiler, you can switch to the option variant with: =E2=94=8C=E2=94=80=E2=94=80=E2=94=80=E2=94=80 =E2=94=82 opam update =E2=94=82 opam switch create ocaml-variants.5.0.0~alpha0+op= tions =E2=94=94=E2=94=80=E2=94=80=E2=94=80=E2=94=80 where `' is a comma separated list of `ocaml-option-*' packages. For instance, for a flambda and no-flat-float-array switch: =E2=94=8C=E2=94=80=E2=94=80=E2=94=80=E2=94=80 =E2=94=82 opam switch create 5.0.0~alpha0+flambda+nffa ocaml-variants.5.0= .0~alpha0+options ocaml-option-flambda =E2=94=82 ocaml-option-no-flat-float-array =E2=94=94=E2=94=80=E2=94=80=E2=94=80=E2=94=80 The command line above is slightly more complicated for an opam version anterior to opam 2.1: =E2=94=8C=E2=94=80=E2=94=80=E2=94=80=E2=94=80 =E2=94=82 opam update =E2=94=82 opam switch create --packages=3Docaml-variants.5.= 0.0~alpha0+options, =E2=94=82 --repositories=3Ddefault,beta=3Dgit+https://github.com/ocaml/oc= aml-beta-repository.git =E2=94=94=E2=94=80=E2=94=80=E2=94=80=E2=94=80 In both cases, all available options can be listed with `opam search ocaml-option'. If you want to test this version, it is strongly advised to install the alpha opam repository with =E2=94=8C=E2=94=80=E2=94=80=E2=94=80=E2=94=80 =E2=94=82 opam repo add alpha git://github.com/kit-ty-kate/opam-alpha-rep= ository.git =E2=94=94=E2=94=80=E2=94=80=E2=94=80=E2=94=80 This alpha repository contains various fixes in the process of being upstreamed. The source code for the alpha is also available at these addresses: =E2=80=A2 =E2=80=A2 Daniel B=C3=BCnzli asked and octachron replied =E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2= =94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94= =80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80= =E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2= =94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80 Does this mean we get [global warming] again ? Indeed! I should have mentioned that point! The normal development process can restart on the compiler development branch. I will also try to slowly go through the backlog of frozen PRs once the alpha releases settle down. [global warming] Tezt, a framework for all your tests =E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2= =95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95= =90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90= =E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2= =95=90=E2=95=90=E2=95=90 Archive: rbardou announced =E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2= =94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94= =80 Tezt (pronounced [/t=C9=9Bzti/]) is a test framework for OCaml that has been developed and used at Nomadic Labs to test [Octez], an OCaml implementation of the Tezos blockchain. It has become quite mature and we feel it would benefit the OCaml community at large, so we are releasing it publicly as a standalone product. Tezt is well-suited for unit tests, integration tests, and regression tests in particular. It was designed with a focus on user experience, with colourful logs, various ways to select the tests to run from the command-line, and more. It integrates well into CI pipelines. And it cleans up after itself, deleting temporary files and killing external processes. Unless you tell it not to, of course. For a more in-depth tour of Tezt, see [our latest blog post entry]. Tezt is available on opam: =E2=94=8C=E2=94=80=E2=94=80=E2=94=80=E2=94=80 =E2=94=82 opam install tezt =E2=94=94=E2=94=80=E2=94=80=E2=94=80=E2=94=80 Have a look at the [API documentation] and the [source code]. [/t=C9=9Bzti/] [Octez] [our latest blog post entry] [API documentation] [source code] OCaml Stdlib, Containers, Batteries, Base and F# core functions comparisons =E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2= =95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95= =90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90= =E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2= =95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95= =90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90= =E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2= =95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95= =90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90 Archive: Jp R announced =E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2= =94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80 Comparisons (names/signatures) of the core functions used in: =E2=80=A2 OCaml Stdlib (v4.41.0) =E2=80=A2 Containers (v3.8) =E2=80=A2 Batteries (v3.5.1) =E2=80=A2 Base (v0.15.0) =E2=80=A2 F# (v6.0) as a bonus Note: F# provides an Array.Parallel module with some functions (choose, collect, init, iter, iteri, map, mapi, partition) which could be good candidates for OCaml 5.0.0=E2=80=A6 Dune 3.3.0 =E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2= =95=90=E2=95=90 Archive: Etienne Millon announced =E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2= =94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94= =80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80 On behalf of the dune team, I=E2=80=99m pleased to announce the release of version 3.3.0. This is the first version that supports the upcoming OCaml 5.0. It also improves safety by sandboxing more rules and enabling more warnings, and there's a bunch of new features on the coq side too. Full changelog follows. Note that as usual, dune works hard not to break existing packages. So even if it mentions that rules require precise dependencies, for example, this new safety net is only enabled for project that use `(lang dune 3.3)'. Happy hacking. 3.3.0 (17-06-2022) =E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2= =95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95=8C=E2=95= =8C=E2=95=8C =E2=80=A2 Sandbox preprocessing, lint, and dialect rules by default. All = these rules now require precise dependency specifications (#5807, @rgrinberg) =E2=80=A2 Allow list expansion in the `pps' specification for preprocessi= ng (#5820, @Firobe) =E2=80=A2 Add warnings 67-69 to dune's default set of warnings. These are warnings of the form "unused X.." (#5844, @rgrinberg) =E2=80=A2 Introduce project "composition" for coq theories. Coq theories = in separate projects can now refer to each other when in the same workspace (#5784, @Alizter, @rgrinberg) =E2=80=A2 Fix hint message for `data_only_dirs' that wrongly mentions the unknown constructor `data_only' (#5803, @lambdaxdotx) =E2=80=A2 Fix creating sandbox directory trees by getting rid of buggy memoization (#5794, @rgrinberg, @snowleopard) =E2=80=A2 Handle directory dependencies in sandboxed rules. Previously, t= he parents of these directory dependencies weren't created. (#5754, @rgrinberg) =E2=80=A2 Set the exit code to 130 when dune is terminated with a signal (#5769, fixes #5757) =E2=80=A2 Support new locations of unix, str, dynlink in OCaml >=3D 5.0 (= #5582, @dra27) =E2=80=A2 The `coq.theory' stanza now produces rules for running `coqdoc'. Given a theory named `mytheory', the directory targets `mytheory.html/' and `mytheory.tex/' or additionally the aliases `@doc' and `@doc-latex' will build the HTML and LaTeX documentation repsectively. (#5695, fixes #3760, @Alizter) =E2=80=A2 Coq theories marked as `(boot)' cannot depend on other theories (#5867, @ejgallego) =E2=80=A2 Ignore `bigarray' in `(libraries)' with OCaml >=3D 5.0. (#5526,= fixes #5494, @moyodiallo) =E2=80=A2 Start with :standard when building the ctypes generated foreign stubs so that we include important compiler flags, such as -fPIC (#5816, fixes #5809). Old CWN =E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90=E2=95=90 If you happen to miss a CWN, you can [send me a message] and I'll mail it to you, or go take a look at [the archive] or the [RSS feed of the archives]. If you also wish to receive it every week by mail, you may subscribe [online]. [Alan Schmitt] [send me a message] [the archive] [RSS feed of the archives] [online] [Alan Schmitt] --=-=-= Content-Type: text/html; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable OCaml Weekly News

OCaml Weekly News

Previous Week<= /a> Up Next Week

Hello

Here is the latest OCaml Weekly News, for the week of June 14 to 21, 2022.

OBazl Toolsuite - tools for building OCaml with Bazel

Archive: https://discuss.ocaml.org/t/obazl-toolsui= te-tools-for-building-ocaml-with-bazel/10021/1

Gregg Reynolds announced

Version 2 of OBazl, a Bazel ruleset for building OCaml code, will soon be a= vailable. I'm letting you know early because I'll be giving a presentation about the OBazl Toolsuite for the Bazel Exchange conference next Wed, 22 June, at 3:00 pm UDT (10:00 am CDT). It's a virtual conference so you can tune in from anywhere.= The talk will focus on some of the quirks of the OCaml build discipline and how I addressed them for the OBazl= ruleset.

The tools are usable now, they're just not yet properly documented and pack= aged, and in a few places there's a little more work to be done on the code. Nonetheless there is quite a bit of docum= entation (CAVEAT: some of it is outdated), with more on the way soon, and there are lots of demos available. So if yo= u're interested in using Bazel to build your OCaml code I welcome you to take a look:

The OBazl Book

Twitter handle is @obazldev Discord: https://discord.gg/PHSA= W5DUva

Gregg Reynolds lated added

PS. The conference organizers have provided this discount token: BAZEL-GR= -20

It should be good for 20% off, registration is at https://events.skill= smatter.com/bazelx2022

Job offer: 3 years compiler engineer at the French tax authori= ty

Archive: https://discuss.ocaml.org/t/j= ob-offer-3-years-compiler-engineer-at-the-french-tax-authority/10023/1

Denis Merigoux announced

[En fran=C3=A7ais parce que c'est une offre d'emploi dans l'administration]

Bonjour =C3=A0 toutes et =C3=A0 tous,

Vous aimez la programmation fonctionnelle et les compilateurs ? Vous en ave= z marre des offres d'emploi dans la blockchain ? =C3=87a tombe bien, j'ai ce qu'il vous faut !

Il y a deux ans, j'ai lanc=C3=A9 un grand projet de modernisation du calcul= informatique de calcul de l'imp=C3=B4t sur le revenu =C3=A0 la Direction G=C3=A9n=C3=A9rale des Finances Publiques (DGFiP= ), en partenariat avec Inria: https://www.inria.fr/fr/mlang-modernisation-calcul-impot-revenu.

Le logiciel au c=C5=93ur de ce projet de modernisation est Mlang, un compil= ateur =C3=A9crit en OCaml pour un couple de langages d=C3=A9di=C3=A9s utilis=C3=A9s par la DGFiP pour encoder le calcul de l'imp= =C3=B4t sur le revenu. Depuis deux ans, la DGFiP travaille =C3=A0 int=C3=A9grer Mlang =C3=A0 l'infrastructure officielle de calcul de l'imp= =C3=B4t sur le revenu pour remplacer des syst=C3=A8mes vieillissants. C'est donc un projet =C3=A0 tr=C3=A8s fort impact (80M=E2=82= =AC par d'imp=C3=B4ts par an), et proche de la R&D (OCaml, libre, innovation) ! Depuis un an, la DGFiP emploie la soci=C3=A9t=C3=A9 OCamlPro = sur le projet mais souhaite maintenant r=C3=A9-internaliser ses comp=C3=A9tences pour garder la souverainet=C3=A9 = num=C3=A9rique sur son infrastructure de calcul.

C'est l=C3=A0 que cette offre d'emploi entre en jeu ! En effet la DGFiP vie= nt d'ouvrir un poste en CDD de 3 ans pour un.e expert.e en compilation ! Les d=C3=A9tails :

  • Bureaux =C3=A0 Noisy-le-Grand (+ jusqu'=C3=A0 3 jours t=C3=A9l=C3=A9tra= vail/semaine)
  • Salaire: =C3=80 n=C3=A9gocier selon exp=C3=A9rience mais similaire =C3= =A0 "Inspecteur des finances publiques". Selon le site du minist=C3=A8re de= l'=C3=A9conomie =C3=A7a d=C3=A9buterait =C3=A0 3k=E2=82=AC net/mois.
  • T=C3=A2ches: Maintenance, =C3=A9volution de Mlang et travaux annexes

Et pour l'heureux.se recrut=C3=A9.e, la cerise sur le g=C3=A2teau sera de p= ouvoir collaborer avec moi et l'=C3=A9quipe Prosecco d'Inria (ainsi que Rapha=C3=ABl Monat, ) :) Attention cependant : il faudra= s'attendre =C3=A0 devoir =C3=A9galement aider l'=C3=A9quipe de la DGFiP sur d'autres chantiers en fonction des priorit=C3=A9s. De m=C3= =AAme, l'objectif est de partager la comp=C3=A9tence en compilation au sein de la DGFiP, donc les profils =C3=A9vang=C3=A9lisateurs= de la programmation fonctionnelle sont les bienvenus !

Pour r=C3=A9f=C3=A9rence, voici l'offre officielle compl=C3=A8te: https://merigoux.ovh/assets= /OffreDGFiP.pdf. S'il vous pla=C3=AEt, pas d'autocensure =C3=A0 cause de ce qui est marqu=C3=A9 dans ce PDF! Si vous a= vez un doute contactez-moi par retour de mail.

Deadline pour les candidatures: 9 juillet. Prise de poste inconnue, s=C3=BB= rement aux alentours du 1er septembre mais j'imagine que c'est n=C3=A9gociable.

Denis Merigoux later added

Si vous =C3=AAtes int=C3=A9ress=C3=A9.e, envoyez votre CV et lettre de moti= vation =C3=A0 bureau.si-part-rh@dgfip.finances.gouv.fr et bureau.rh-mobilite-carriere-a-recrutementchoix@dgfip.finances.gouv.fr.

OCaml 5.0, zeroth alpha release

Archive: https://discuss.ocaml.org/t/ocaml-5-0-zeroth-alpha-release/100= 26/1

octachron announced

Five months after the initial merge of the multicore branch into the mainli= ne OCaml and three months after the release of OCaml 4.14.0, OCaml 5.0.0 is starting to take shape.

I am thus happy to announce an exceptional zeroth alpha release of OCaml 5.= 0.0 (see below for the installation instructions).

This alpha release is expected to be rougher than an usual alpha release, d= ue to the full rewrite of the OCaml runtime. In particular, the bytecode debugger will only be available in the= next alpha release. Similarly, there will be some changes to the internal C runtime API and to the files installed by= the compiler package in the next alpha release.

Moreover, this zeroth alpha release is the occasion to remind everyone that= OCaml 5.0 itself is expected to be a more experimental release than usual. Notably, the native compiler will only be = available on the ARM64 and x86-64 architectures in this 5.0 release.

Nevertheless, this zeroth alpha version is already stable enough for fellow= hackers eager to join us in our early bug hunting and opam ecosystem fixing fun, or to venture in the new era of para= llelism and (experimental) effects.

You can follow the progresses in stabilising the opam ecosystem on

https://g= ithub.com/ocaml/opam-repository/issues/21526

A brief summary is that at least dune, merlin, ppxlib, utop, ocamlfind, and= ocamlbuild work (potentially by using patches from the alpha opam repository).

If you find any bugs, please report them here:

https://github.com/ocaml/= ocaml/issues

In particular, any sequential OCaml 4 library or program should be valid in= OCaml 5 (except for deprecated modules and functions). Please don't hesitate to report any compatibility bugs!

If you are interested by the ongoing list of bug fixes, the updated change = log for OCaml 5.0.0 is available at:

https://github.= com/ocaml/ocaml/blob/5.0/Changes

Installation instructions

The base compiler can be installed as an opam switch with the following com= mands on opam 2.1: 

opam update
opam switch create 5.0.0~alpha0

For previous version of opam, the switch creation command line is slightly = more verbose: 

opam update
opam switch create 5.0.0~alpha0 --repositories=3Ddefault,beta=3Dgit+https:/=
/github.com/ocaml/ocaml-beta-repository.git

If you want to tweak the configuration of the compiler, you can switch to t= he option variant with: 

opam update
opam switch create <switch_name> ocaml-variants.5.0.0~alpha0+options =
<option_list>

where <option_list> is a comma separated list of o= caml-option-* packages. For instance, for a flambda and no-flat-float-array switch: 

opam switch create 5.0.0~alpha0+flambda+nffa ocaml-variants.5.0.0~alpha0+op=
tions ocaml-option-flambda
ocaml-option-no-flat-float-array

The command line above is slightly more complicated for an opam version ant= erior to opam 2.1: 

opam update
opam switch create <switch_name> --packages=3Docaml-variants.5.0.0~al=
pha0+options,<option_list>
--repositories=3Ddefault,beta=3Dgit+https://github.com/ocaml/ocaml-beta-rep=
ository.git

In both cases, all available options can be listed with opam search o= caml-option.

If you want to test this version, it is strongly advised to install the alp= ha opam repository

https://gi= thub.com/kit-ty-kate/opam-alpha-repository

with 

opam repo add alpha git://github.com/kit-ty-kate/opam-alpha-repository.git

This alpha repository contains various fixes in the process of being upstre= amed.

The source code for the alpha is also available at these addresses:

Daniel B=C3=BCnzli asked and octachron replied

Does this mean we get global warming again ?

Indeed! I should have mentioned that point! The normal development process = can restart on the compiler development branch.

I will also try to slowly go through the backlog of frozen PRs once the alp= ha releases settle down.

Tezt, a framework for all your tests

Archive: https://discuss.ocaml.org/t/ann-tezt-a-framework-for-= all-your-tests/10038/1

rbardou announced

Tezt (pronounced t= =C9=9Bzti) is a test framework for OCaml that has been developed and used at Nomadic Labs to test Octez, an OCaml implementation of the Tezos blockchain. It has become quite mature and we feel it would benefit the OCa= ml community at large, so we are releasing it publicly as a standalone product.

Tezt is well-suited for unit tests, integration tests, and regression tests= in particular. It was designed with a focus on user experience, with colourful logs, various ways to select the t= ests to run from the command-line, and more. It integrates well into CI pipelines. And it cleans up after itself, = deleting temporary files and killing external processes. Unless you tell it not to, of course.

For a more in-depth tour of Tezt, see our latest blog post entry.

Tezt is available on opam: 

opam install tezt

Have a look at the API documentation and the source code.

OCaml Stdlib, Containers, Batteries, Base and F# core function= s comparisons

Archive: https://discuss.ocaml= .org/t/ocaml-stdlib-containers-batteries-base-and-f-core-functions-comparis= ons/10041/1

Jp R announced

https://github.com/Fourchaux/OC= aml-Stdlib_Containers_Batteries_Base-and-FSharp--core-functions-comparisons=

Comparisons (names/signatures) of the core functions used in:

  • OCaml Stdlib (v4.41.0)
  • Containers (v3.8)
  • Batteries (v3.5.1)
  • Base (v0.15.0)
  • F# (v6.0) as a bonus

Note: F# provides an Array.Parallel module with some functions (choose, collect, init, iter, iteri, map, mapi, partition) which could be good candidates for OCaml 5.0.0…

Dune 3.3.0

Archive: htt= ps://discuss.ocaml.org/t/ann-dune-3-3-0/10048/1

Etienne Millon announced

On behalf of the dune team, I=E2=80=99m pleased to announce the release of = version 3.3.0. This is the first version that supports the upcoming OCaml 5.0. It also improves safety by sandboxing more= rules and enabling more warnings, and there's a bunch of new features on the coq side too. Full changelog follows.

Note that as usual, dune works hard not to break existing packages. So even= if it mentions that rules require precise dependencies, for example, this new safety net is only enabled for project = that use (lang dune 3.3).

Happy hacking.

3.3.0 (17-06-2022)

  • Sandbox preprocessing, lint, and dialect rules by default. All these ru= les now require precise dependency specifications (#5807, @rgrinberg)
  • Allow list expansion in the pps specification for preproce= ssing (#5820, @Firobe)
  • Add warnings 67-69 to dune's default set of warnings. These are warning= s of the form "unused X.." (#5844, @rgrinberg)
  • Introduce project "composition" for coq theories. Coq theories in separ= ate projects can now refer to each other when in the same workspace (#5784, @Alizter, @rgrinberg)
  • Fix hint message for data_only_dirs that wrongly mentions = the unknown constructor data_only (#5803, @lambdaxdotx)
  • Fix creating sandbox directory trees by getting rid of buggy memoization (#5794, @rgrinberg, @snowleopard)
  • Handle directory dependencies in sandboxed rules. Previously, the paren= ts of these directory dependencies weren't created. (#5754, @rgrinberg)
  • Set the exit code to 130 when dune is terminated with a signal (#5769, = fixes #5757)
  • Support new locations of unix, str, dynlink in OCaml >=3D 5.0 (#5582= , @dra27)
  • The coq.theory stanza now produces rules for running coqdoc. Given a theory named mytheory, the directory targets mytheory.ht= ml/ and mytheory.tex/ or additionally the aliases @doc an= d @doc-latex will build the HTML and LaTeX documentation repsectively. (#5695, fixes #3760, @Alizter)
  • Coq theories marked as (boot) cannot depend on other theor= ies (#5867, @ejgallego)
  • Ignore bigarray in (libraries) with OCaml >= ;=3D 5.0. (#5526, fixes #5494, @moyodiallo)
  • Start with :standard when building the ctypes generated foreign stubs s= o that we include important compiler flags, such as -fPIC (#5816, fixes #5809).

Old CWN

If you happen to miss a CWN, you can send me a message and I'll mail it to you, or go take a loo= k at the archive or the <= a href=3D"https://alan.petitepomme.net/cwn/cwn.rss">RSS feed of the archive= s.

If you also wish to receive it every week by mail, you may subscribe online.

--=-=-=--