OCaml 5.0 Release Readiness

[dra27]

This issue tracks the build and readiness information of core platform tools and libraries in preparation for the OCaml 5.0 release. It’s intended as a meta-issue / holding place for TODO lists and links to other milestones/issues rather than general discussion (which is welcomed on Discuss or on linked issues).

Packages that are fixed upstream, have a PR ready, or can be used as-is for testing purpose, are in kit-ty-kate/opam-alpha-repository. A test run is done using this repository every 48 hours and the latest run can be seen in opam-health-check and compared against OCaml 4.14.

Platform tools:

• opam
• dune
• merlin - 4.6 preview available in opam-repository
• lsp-server / vscode-plugin preview package available in opam-repository
• odoc
• ocamlformat
• ocp-indent

Ecosystem:

• ocamlfind
• ocamlbuild
• ppxlib - Add 5.0 support ocaml-ppx/ppxlib#348
• mdx - builds; testsuite failing
• utop - Support new Load_path.init API ocaml-community/utop#377
• dune-release
• opam-publish

Infrastructure:

• ocaml.org
• docker base containers - Add 5.1 trunk image ocurrent/docker-base-images#171
• ocaml-ci
• opam-repo-ci