[Caml-list] Attn: Development Editor, Latest OCaml Weekly News

Alan Schmitt
2019-10-15T07:28:29Z

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Hello

Here is the latest OCaml Weekly News, for the week of October 08
to 15,
2019.

Table of Contents
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capnp-rpc 0.4.0
Ocaml-protoc.plugin.1.0.0
Old CWN

capnp-rpc 0.4.0
═══════════════

Archive:
<https://discuss.ocaml.org/t/ann-capnp-rpc-0-4-0/4524/1>

Thomas Leonard announced
────────────────────────

I'm pleased to announce the release of [capnp-rpc 0.4.0], an
OCaml
implementation of the Cap'n Proto RPC specification.

If you haven't used the library before, please see the
[documentation
and tutorial]. Cap'n Proto RPC aims to provide secure,
efficient,
typed communications between multiple parties.

This library is now being used to build [ocaml-ci], where it is
used
for all communication between the web frontend and backend
services,
and to provide a command-line client.

[capnp-rpc 0.4.0]
<https://github.com/mirage/capnp-rpc/releases/tag/v0.4.0>

[documentation and tutorial]
<https://github.com/mirage/capnp-rpc/blob/master/README.md>

[ocaml-ci] <https://github.com/ocaml-ci/ocaml-ci>

Main changes since v0.3
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

Breaking changes:

• Wrap errors with the ``Capnp' tag to make it easier to compose
with
other types of error.

• Prefix all command-line options with `capnp-'.
e.g. `--listen-address' is now `--capnp-listen-address'. The
old
names were confusing for applications that supported other
protocols
too (e.g. a web server).

New features:

• Add `Capability.with_ref' convenience function. This
automatically
calls `dec_ref' when done.

• Add Unix `Cap_file' module to load and save `Sturdy_refs'. In
particular, this ensures that saved cap files get a mode of
`0o600',
since they contain secrets.

• Export cmdliner network address parsing. This is useful if
you
don't want to use the default option parsing. For example, if
you
want to make Cap'n Proto an optional feature of your program.

• Upgrade from `uint' (which is deprecated) to the newer
`stdint'.
The latest version of `uint' is just a wrapper around
`stdint', so
this shouldn't break anything if you are using the latest
version.

• Put cmdliner options in their own man-page section. Use
`Capnp_rpc_unix.manpage_capnp_options' to control where in
your
man-page they appear.

• Enable `SO_KEEPALIVE' for TCP connections. For use with
Docker's
libnetwork, try something like this in your `stack.yml':
┌────
│ sysctls:
│ - 'net.ipv4.tcp_keepalive_time=60'
└────

Ocaml-protoc.plugin.1.0.0
═════════════════════════

Archive:
<https://discuss.ocaml.org/t/ann-ocaml-protoc-plugin-1-0-0/4535/1>

Anders Fugmann announced
────────────────────────

I'm happy to announce the second release of
[ocaml-protoc-plugin].

Ocaml-protoc-plugin is a plugin to googles `protoc' compiler
which
generates type idiomatic to ocaml from `.proto' files including
full
compliant serialization and deserialization functions.

[ocaml-protoc-plugin]
<https://github.com/issuu/ocaml-protoc-plugin>

Most noteworthy changes in this release:
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

• Full proto2 support.
• The list of dependencies has been slimmed way down, and now
only
depends on `conf-protoc' (the `protoc' compiler and googles
*well
known types*).
• Buckescript support.
• Added options to change the ocaml (type for scalar types (int,
int64
or int32).

Many thanks to Wojtek Czekalski for helping trimming
dependencies and
for Buclescript support.

Full changelog:
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

• Support enum aliasing
• Avoid name clash with on 'name'
• Fix code generation when argument contains a path
• Refactor internal types to make serialization and
deserialization
type spec symmetrical.
• Optimize deserialization for messages with max_id < 1024
• Don't depend on Base in runtime
• Slim runtime dependencies: Remove need for base, ocplib-endian
and
ppx_let
• Honor [packed=…] flag.
• Make fixed scalar types default to int32 and int64
• Support proto2 specification
• Add options to switch between int64|int32 and int
• Fix name clash problem with special enum names
• Refactor serialization and deserialization to simplify emitted
code
• Eagerly evaluate serialization (for speed).

Old CWN
═══════

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[Alan Schmitt]

[send me a message] <mailto:alan.schmitt@polytechnique.org>

[the archive] <http://alan.petitepomme.net/cwn/>

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[online] <http://lists.idyll.org/listinfo/caml-news-weekly/>

[Alan Schmitt] <http://alan.petitepomme.net/>

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