+lwt.2.7.0 - concurrency library

[aantron]

See the changelog. This release prepares Lwt for some minor breaking changes around 1 April. See notice.

[camelus]

❌ opam-lint errors 755e39d

• cowabloga.0.0.1 has errors:

  • error 25: Missing field 'authors'
  • error 35: Missing field 'homepage'
  • warning 36: Missing field 'bug-reports'

• cowabloga.0.0.2 has errors:

  • error 25: Missing field 'authors'
  • error 35: Missing field 'homepage'
  • warning 36: Missing field 'bug-reports'

• cowabloga.0.0.3 has errors:

  • error 25: Missing field 'authors'
  • error 35: Missing field 'homepage'
  • warning 36: Missing field 'bug-reports'

• cowabloga.0.0.4 has errors:

  • error 25: Missing field 'authors'
  • error 35: Missing field 'homepage'
  • warning 36: Missing field 'bug-reports'

• cowabloga.0.0.5 has errors:

  • error 25: Missing field 'authors'
  • error 35: Missing field 'homepage'
  • warning 36: Missing field 'bug-reports'

• cowabloga.0.0.6 has errors:

  • error 25: Missing field 'authors'
  • error 35: Missing field 'homepage'
  • warning 36: Missing field 'bug-reports'

• cowabloga.0.0.7 has errors:

  • error 25: Missing field 'authors'
  • error 35: Missing field 'homepage'
  • warning 36: Missing field 'bug-reports'

• cowabloga.0.0.8 has errors:

  • error 25: Missing field 'authors'
  • error 35: Missing field 'homepage'
  • warning 36: Missing field 'bug-reports'

• cowabloga.0.0.9 has errors:

  • error 25: Missing field 'authors'
  • error 35: Missing field 'homepage'
  • warning 36: Missing field 'bug-reports'

• release.1.1.1 has errors:

  • error 25: Missing field 'authors'
  • error 35: Missing field 'homepage'
  • warning 36: Missing field 'bug-reports'
  • warning 37: Missing field 'dev-repo'

• usb.1.3.0 has errors:

  • error 25: Missing field 'authors'
  • warning 36: Missing field 'bug-reports'
  • warning 37: Missing field 'dev-repo'

• xe.0.6.0 has errors:

  • error 25: Missing field 'authors'
  • error 35: Missing field 'homepage'
  • warning 36: Missing field 'bug-reports'

• xe.0.6.2 has errors:

  • error 25: Missing field 'authors'
  • error 35: Missing field 'homepage'
  • warning 36: Missing field 'bug-reports'

• xe.0.6.3 has errors:

  • error 25: Missing field 'authors'
  • error 35: Missing field 'homepage'
  • warning 36: Missing field 'bug-reports'

• lwt.2.7.0 has some warnings:

  • warning 41: Some packages are mentionned in package scripts of features, but there is no
    dependency or depopt toward them: "lwt_glib", "lwt_react", "lwt_ssl"

• These packages passed lint tests: cowabloga.0.1.0, cowabloga.0.2.0, cowabloga.0.2.1, dog.0.1.0, dog.0.2.0, dog.0.2.1, tlstunnel.0.1.0, tlstunnel.0.1.1, tlstunnel.0.1.2, tlstunnel.0.1.3, vpnkit.0.0.0

---

✅ Installability check (5949 → 5950)

• new installable packages (1): lwt.2.7.0

[avsm]

notes from the revdeps build in CI:

• cowabloga fails to build due to deprecation warnings, so needs upper bound:

# File "lib_test/site.ml", line 20, characters 2-14:
# Warning 3: deprecated: Lwt_unix.run
#  Use Lwt_main.run.
# File "lib_test/site.ml", line 1:
# Error: Some fatal warnings were triggered (1 occurrences)
# Command exited with code 2.
# Makefile:18: recipe for target 'all' failed

same problem for dog:

# File "src/main.ml", line 51, characters 2-14:
# Warning 3: deprecated: Lwt_unix.run
#  Use Lwt_main.run.
# File "src/main.ml", line 1:
# Error: Some fatal warnings were triggered (1 occurrences)

iocamljs-kernel may need an upper bound too:

# File "iocaml.ml", line 220, characters 18-31:
# Warning 3: deprecated: String.create
# Use Bytes.create instead.
# File "iocaml.ml", line 222, characters 12-19:
# Warning 3: deprecated: String.set
# Use Bytes.set instead.
# Error for package iocaml
# Fatal error: exception Fl_package_base.No_such_package("iocaml", "")
# Fatal error: exception Failure("Error: jsoo_mkcmis -o exported-unit.cmis.js iocaml /home/opam/.opam/4.04.0/lib/ocaml/compiler-libs/outcometree.cmi /home/opam/.opam/4.04.0/lib/ocaml/compiler-libs/topdirs.cmi /home/opam/.opam/4.04.0/lib/ocaml/compiler-libs/toploop.cmi")
# make: *** [min] Error 2

revdep build continues at https://ci.ocaml.io/ocaml/opam-repository/pr/8195

[aantron]

Will add bounds on cowabloga and dog. FTR these packages were noticed in ocsigen/lwt#107 (comment), Lwt 2.7.0 just adds an actual deprecation warning to go with the pre-existing deprecation of Lwt_unix.run. The iocamljs-kernel warning does not look related to Lwt.

[avsm]

The OPAM2 CI failures are due to ocaml/opam#2806

[aantron]

I looked through the logs, and in addition to dog and cowabloga, also found failures to build due to new deprecation warnings for release, tlstunnel, vpnkit. These packages were also noticed in ocsigen/lwt#308. I added a < "2.7.0" bound for each release of these packages that didn't already have a narrower bound.

cc @andrenth @djs55 @hannesm @avsm (hi!) @samoht

I already plan to ping the maintainers there again, in addition to maintainers of packages that still build with the warnings.

- File "lib/core/release_socket.ml", line 10, characters 2-15:
- Warning 3: deprecated: Lwt_unix.bind
-  This function will soon evaluate to a promise (-> unit Lwt.t), because the
-  bind system call can block for Unix domain sockets. See
-    https://github.com/ocsigen/lwt/issues/230
-  This will be a breaking change in Lwt 3.0.0.
-  If you don't use Unix domain sockets and use Lwt_unix.bind ... ; rather than
-  let () = Lwt_unix.bind ... in, you can ignore this warning.
-  To retain the current signature, use Lwt_unix.Versioned.bind_1
-  To use the new non-blocking version immediately, use Lwt_unix.Versioned.bind_2
-  Both alternatives require Lwt >= 2.7.0.
- File "lib/core/release_socket.ml", line 1:
- Error: Some fatal warnings were triggered (1 occurrences)

- File "tlstunnel.ml", line 120, characters 6-10:
- Warning 3: deprecated: Lwt_unix.bind
-  This function will soon evaluate to a promise (-> unit Lwt.t), because the
-  bind system call can block for Unix domain sockets. See
-    https://github.com/ocsigen/lwt/issues/230
-  This will be a breaking change in Lwt 3.0.0.
-  If you don't use Unix domain sockets and use Lwt_unix.bind ... ; rather than
-  let () = Lwt_unix.bind ... in, you can ignore this warning.
-  To retain the current signature, use Lwt_unix.Versioned.bind_1
-  To use the new non-blocking version immediately, use Lwt_unix.Versioned.bind_2
-  Both alternatives require Lwt >= 2.7.0.
- File "tlstunnel.ml", line 1:
- Error: Some fatal warnings were triggered (1 occurrences)

- File "src/hostnet/host_lwt_unix.ml", line 630, characters 12-25:
- Warning 3: deprecated: Lwt_unix.bind
-  This function will soon evaluate to a promise (-> unit Lwt.t), because the
-  bind system call can block for Unix domain sockets. See
-    https://github.com/ocsigen/lwt/issues/230
-  This will be a breaking change in Lwt 3.0.0.
-  If you don't use Unix domain sockets and use Lwt_unix.bind ... ; rather than
-  let () = Lwt_unix.bind ... in, you can ignore this warning.
-  To retain the current signature, use Lwt_unix.Versioned.bind_1
-  To use the new non-blocking version immediately, use Lwt_unix.Versioned.bind_2
-  Both alternatives require Lwt >= 2.7.0.
- File "src/hostnet/host_lwt_unix.ml", line 1:
- Error: Some fatal warnings were triggered (3 occurrences)

---

In addition, usb and xe have build failures due to missing dependencies on
camlp4, which causes lwt.syntax not to be built. I added the dependencies.

cc @diml @djs55

---

Several packages don't build due to dependency constraints involving Lwt. I noticed mirage-http-unix and mirage-www.

[aantron]

Ok, usb and xe now build, and the bot didn't attempt to build the five packages with new constraints (presumably this is the expected behavior).

[aantron]

Closing this in favor of #8196, since that PR has all the commits of this PR and more, and works just fine. Hope that's fine.