dev meeting 2025 12 10

Agenda

• https://github.com/ocaml/dune/pull/12800 (@Alizter)
• 3.21 regressions (@Alizter)
  • https://github.com/ocaml/dune/issues/12619

Notes

• present: @alizter, @electraas, @sudha247, @shonfeder, @art-w, @Leonidas-from-XIV

• https://github.com/ocaml/dune/pull/12800 (@Alizter)

  • Building oxcaml with dune, we set INSIDE_DUNE
  • This limits concurrency of dune to 1
  • So oxcaml only builds with 1 core and it takes like 1/2 hour for it to build
  • Hack is to unset INSIDE_DUNE in opam file
  • Propper fix is to decouple INSIDE_DUNE from setting concurrency
  • There is a PR in place with two commits:
    • We add an env var to set concurrency
    • We change INSIDE_DUNE to no longer determine concurrency
    • Requires setting a lot of tests to use the new concurrency env var
    • But this is creating a lot of noise in test suite due to how server works
  • Ali: has suggested putting this in release, (and blocking on it)
    • After discussion we agreed not to increase scope of the release, but that we would aim to get this in ASAP.

• 3.21 regressions and release (@Alizter)

  • https://github.com/ocaml/dune/issues/12619
  • Need a fix for opam-dune-lint (https://github.com/ocaml/dune/issues/12897)
    • If no one is using this in critical infra, then we can drop an upper bound on opam-dune-lint
  • Dune hangs on mdx tests https://github.com/ocaml/dune/issues/12900
    • This is a bug, but not something we necessarily need to block on the
    • Amber is working on the fix, we think it should
  • Fixed two critical braeking regressions
    • Breakage on alpine and freebsd: needed inlined macro
    • Ali rewrote cram lexer, which broke a single test in opam-repo-ci
  • Shon: I propose we only release what we have now, just fixing any critical regressions, main
  • https://github.com/search?q=%22INSIDE_DUNE%22&type=code
  • There is a new file stanza we would like to be in release 3.21
    • Shon: will cut new release branch

• User reaserch and feedback (@ElectrAAS)

  • Got a lot of good feedback at Tarides holiday party

• Action items

  • Shon: Reviewing the js_of_ocaml PR -- actually, there is a blocking review comment there now
  • Shon: Merging the inline tests