Disable the web plugin on macOS

The Homebrew package for its http parser dependency was disabled quite a
while ago because the library is unmaintained and no longer compiled
from source against our current compiler toolchain, so it's really hard
to build the `web` plugin on macOS. This just disables it.

This also re-enables the `parquet` plugin on macOS, as that no longer
uses illegal instruction as far as I can tell.

.github/workflows/tenzir.yaml

@@ -582,13 +582,9 @@ jobs:
  dependencies-script-path: scripts/macOS/install-dev-dependencies.sh
  cmake-extra-flags: -DTENZIR_ENABLE_BUNDLED_CAF:BOOL=ON
  bundled-plugins:
- # - Parquet uses illegal instructions on macOS in Arrow version
- # 14.0.1, so we disable it in the macOS CI. Last checked on
- # 2023-12-16.
- # - The http-parser package is disabled on Hoembrew, which means
- # we cannot build the web plugin on macOS anymore. Last checked
- # on 2024-01-31.
- - plugins/[^(parquet)(web)]*
+ # macOS runners in GitHub Actions CI are very limited, so we
+ # prefer to have fewer jobs running and build the proprietary
+ # plugins as bundled on macOS.
  - contrib/tenzir-plugins/*
  env:
  BUILD_DIR: build

plugins/web/CMakeLists.txt

@@ -1,5 +1,10 @@
 cmake_minimum_required(VERSION 3.19...3.28 FATAL_ERROR)
 
+if (APPLE)
+ message(WARNING "The http_parser library is unmaintained and no longer available on macOS; disabling the web plugin")
+ return()
+endif ()
+
 project(
  web
  DESCRIPTION "Web plugin for Tenzir"