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Dune 3.18.0

The Dune Team is happy to announce the release of Dune 3.18.0!

This release contains changes to support the new x-maintenance-intent field by default. It also contains some changes regarding the cache about how it handles file permissions. It introduces a new (format-dune-file ...) stanza with the intention to formalize the dune format-dune-file command as an inside rule. Finally, it includes various bug fixes for Dune.

See full changelog

Fixed

  • Support HaikuOS: don't call execve since it's not allowed if other pthreads have been created. The fact that Haiku can't call execve from other threads than the principal thread of a process (a team in haiku jargon), is a discrepancy to POSIX and hence there is a bug about it. (@Sylvain78, #10953)

  • Fix flag ordering in generated Merlin configurations (#11503, @voodoos, fixes ocaml/merlin#1900, reported by @vouillon)

Added

  • Add (format-dune-file <src> <dst>) action. It provides a replacement to dune format-dune-file command. (#11166, @nojb)

  • Allow the --prefix flag when configuring dune with ocaml configure.ml. This allows to set the prefix just like $ dune install --prefix. (#11172, @rgrinberg)

  • Allow arguments starting with + in preprocessing definitions (starting with (lang dune 3.18)). (@amonteiro, #11234)

  • Support for opam (maintenance_intent ...) in dune-project (#11274, @art-w)

  • Validate opam maintenance_intent (#11308, @art-w)

  • Support not in package dependencies constraints (#11404, @art-w, reported by @hannesm)

Changed

  • Warn when failing to discover root due to reads failing. The previous behavior was to abort. (@KoviRobi, #11173)

  • Use shorter path for inline-tests artifacts. (@hhugo, #11307)

  • Allow dash in dune init project name (#11402, @art-w, reported by @saroupille)

  • On Windows, under heavy load, file delete operations can sometimes fail due to AV programs, etc. Guard against it by retrying the operation up to 30x with a 1s waiting gap (#11437, fixes #11425, @MSoegtropIMC)

  • Cache: we now only store the executable permission bit for files (#11541, fixes #11533, @ElectreAAS)

  • Display negative error codes on Windows in hex which is the more customary way to display NTSTATUS codes (#11504, @MisterDA)