OPAM 1.2.0 Released

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We are very proud to announce the availability of OPAM 1.2.0.

Upgrade from 1.1

Simply follow the usual instructions, using your preferred method (package from your distribution, binary, source, etc.) as documented on the homepage.

NOTE: There are small changes to the internal repository format (~/.opam). It will be transparently updated on first run, but in case you might want to go back and have anything precious there, you're advised to back it up.

Usability

Lot of work has been put into providing a cleaner interface, with helpful behaviour and messages in case of errors.

The documentation pages also have been largely rewritten for consistency and clarity.

New features

This is just the top of the list:

• A extended and versatile opam pin command. See the Simplified packaging workflow
• More expressive queries, see for example opam source
• New metadata fields, including source repositories, bug-trackers, and finer control of package behaviour
• An opam lint command to check the quality of packages

For more detail, see the announcement for the beta, the full changelog, and the bug-tracker.

Package format

The package format has been extended to the benefit of both packagers and users. The repository already accepts packages in the 1.2 format, and this won't affect 1.1 users as a rewrite is done on the server for compatibility with 1.1.

If you are hosting a repository, you may be interested in these administration scripts to quickly take advantage of the new features or retain compatibility.

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About OCamlPro:

OCamlPro is a R&D lab founded in 2011, with the mission to help industrial users benefit from experts with a state-of-the-art knowledge of programming languages theory and practice.

• We provide audit, support, custom developer tools and training for both the most modern languages, such as Rust, Wasm and OCaml, and for legacy languages, such as COBOL or even home-made domain-specific languages;
• We design, create and implement software with great added-value for our clients. High complexity is not a problem for our PhD-level experts. For example, we helped the French Income Tax Administration re-adapt and improve their internally kept M language, we designed a DSL to model and express revenue streams in the Cinema Industry, codename Niagara, and we also developed the prototype of the Tezos proof-of-stake blockchain from 2014 to 2018.
• We have a long history of creating open-source projects, such as the Opam package manager, the LearnOCaml web platform, and contributing to other ones, such as the Flambda optimizing compiler, or the GnuCOBOL compiler.
• We are also experts of Formal Methods, developing tools such as our SMT Solver Alt-Ergo (check our Alt-Ergo Users' Club) and using them to prove safety or security properties of programs.

Please reach out, we'll be delighted to discuss your challenges: contact@ocamlpro.com or book a quick discussion.