[new release] eio (5 packages) (1.5)

[talex5]

Effect-based direct-style IO API for OCaml

• Project page: https://github.com/ocaml-multicore/eio
• Documentation: https://ocaml-multicore.github.io/eio/

CHANGES:

New features:

• Windows paths support (@avsm @kentookura @talex5 @dra27 Move path operations to backends ocaml-multicore/eio#913 Implement Eio.Path.native as a Pi backend and add Windows support ocaml-multicore/eio#916).
  Previously, an Eio.Path.t always used POSIX-style paths, using / as the separator,
  but this didn't work well on Windows, especially with absolute paths.

• Pre-connect socket options (@avsm @art-w @talex5 Pre-connect socket options (follow up to #713) ocaml-multicore/eio#875).
  Eio.Net.connect now has ?bind_to and ?options arguments for pre-connect configuration.
  Allows an outbound socket to be configured before connect or listen.

• Add Eio.Path.of_dir (@talex5 Add Eio.Path.of_dir ocaml-multicore/eio#919).
  Just a convenience function.

Bug fixes:

• Fix handling of empty paths when using fs unconfined (@talex5 Fix handling of empty paths when using fs unconfined ocaml-multicore/eio#907, reported by @samoht, reviewed by @avsm).

  Some path operations could end up using a path of "" which resulted in an error.
  This was breaking Path.mkdirs if only the base directory already existed.

Code cleanups and performance:

• eio_posix: fix build on 32-bit platforms (@talex5 eio_posix: fix build on 32-bit platforms ocaml-multicore/eio#917, reported by @glondu).

• unix: optimise the POSIX path split to allocate much less by scanning (@avsm unix: optimise the posix split to allocate much less by scanning ocaml-multicore/eio#915, reviewed by @talex5).

• eio_linux: use a bigger stack buffer for getdents to speed up bigger dirs (@avsm use a bigger stack buffer for getdents to speed up bigger dirs ocaml-multicore/eio#910).

• Add some more tests for POSIX paths (@avsm @talex5 Add some more tests for POSIX paths ocaml-multicore/eio#918).

• Add "available" to opam files (@talex5 Add "available" to opam files ocaml-multicore/eio#921).

• Clean up dir_path handling (@talex5 @avsm Clean up dir_path handling ocaml-multicore/eio#920).

[talex5]

Summary of CI errors:

• ocluster and playwright: errors look unrelated (also failed with Eio 1.4 release)
• cohttp-bench.6.1.1 (failed: cohttp-server-lwt-unix.6.1.1 failed to build): cohttp-server-lwt-unix doesn't depend on Eio as far as I can tell. The error (/home/opam/.opam/5.5/lib/uring/dune-package: No such file or directory) perhaps suggests a race in something scanning all packages?
• opentelemetry-client-cohttp-lwt isn't using Eio I think (it's just that opentelemetry has a depopt on eio).

So looks OK to me.

[Sudha247]

Thanks @talex5! I took another look, and the CI failures indeed look unrelated. This is fine to merge.

[avsm]

Thanks! You may want to announce this on https://discuss.ocaml.org, where we have a Community category and an announce tag for this purpose.