Squashed 'src/ipc/libmultiprocess/' changes from a4f92969649..1fc65008f7d

1fc65008f7d Merge bitcoin-core/libmultiprocess#237: Made SpawnProcess() behavior safe post fork()
5205a87cd90 test: check SpawnProcess post-fork safety
69652f0edfa Precompute argv before fork in SpawnProcess
30a8681de62 SpawnProcess: avoid fd leak on close failure
d0fc1081d09 Merge bitcoin-core/libmultiprocess#196: ci: Add NetBSD job
7b171f45bfc Merge bitcoin-core/libmultiprocess#234: doc: Fix typos and grammar in documentation and comments
861da39cae9 ci: Add NetBSD job
458745e3940 Fix various typos, spelling mistakes, and grammatical errors in design.md and source code comments.
585decc8561 Merge bitcoin-core/libmultiprocess#236: ci: Install binary package `capnproto` on OpenBSD instead of building it
14e926a3ff3 refactor: extract MakeArgv helper
1ee909393f4 ci: Install binary package `capnproto` on OpenBSD instead of building it
470fc518d4b Merge bitcoin-core/libmultiprocess#230: cmake: add ONLY_CAPNP target_capnp_sources option
2d8886f26c4 Merge bitcoin-core/libmultiprocess#228: Add versions.md and version.h files describing version branches and tags
c1838be565d Merge bitcoin-core/libmultiprocess#225: Improve and document act support
a173f1704ce Merge bitcoin-core/libmultiprocess#223: ci: Replace nix-shell with equivalent nix develop command
625eaca42fb Merge bitcoin-core/libmultiprocess#229: Design Documentation Update
cc234be73a6 Design doc update
81c652687b8 cmake: add ONLY_CAPNP target_capnp_sources option
6e01d2d766e Add versions.md and version.h files describing version branches and tags
4e3f8fa0d2c doc: add instructions for using act
81712ff6bbf ci: disable KVM and sandbox inside act containers
18a2237a8ef ci: Replace nix-shell with equivalent nix develop command

git-subtree-dir: src/ipc/libmultiprocess
git-subtree-split: 1fc65008f7d64161e84c08cbd93109a23dd6a1e9

ci/README.md

@@ -24,3 +24,29 @@ CI_CONFIG=ci/configs/olddeps.bash  ci/scripts/run.sh
 ```
 
 By default CI jobs will reuse their build directories. `CI_CLEAN=1` can be specified to delete them before running instead.
+
+### Running workflows with `act`
+
+You can run either the entire workflow or a single matrix entry locally. On
+macOS or Linux:
+
+1. Install [`act`](https://github.com/nektos/act) and either Docker or
+  Podman.
+2. Inside the Podman VM, create a named volume for the Nix store (ext4,
+  case-sensitive) so builds persist across runs. Recreate it any time you want
+  a clean cache:
+  ```bash
+  podman volume create libmultiprocess-nix
+  ```
+3. From the repo root, launch the workflow. The example below targets the
+  sanitize matrix entry; drop the `--matrix` flag to run every configuration.
+  ```bash
+  act \
+    --reuse \
+    -P ubuntu-latest=ghcr.io/catthehacker/ubuntu:act-24.04 \
+    --container-options "-v libmultiprocess-nix:/nix" \
+    -j build \
+    --matrix config:sanitize
+  ```
+
+

ci/configs/netbsd.bash

@@ -0,0 +1,11 @@
+CI_DESC="CI config for NetBSD"
+CI_DIR=build-netbsd
+export CXXFLAGS="-Werror -Wall -Wextra -Wpedantic -Wno-unused-parameter"
+# Hardcode GCC 14, since default GCC versions installed by NetBSD are older
+# and may not be compatible with libmultiprocess. GCC 14 was chosen because
+# it's the latest compiler available on all versions of NetBSD that we test.
+# Note that the GCC version specified here must match the version specified
+# in pkg_add in ci.yml.
+export CXX="/usr/pkg/gcc14/bin/g++"
+CMAKE_ARGS=(-G Ninja)
+BUILD_ARGS=(-k 0)

ci/scripts/run.sh

@@ -10,4 +10,4 @@ set -o errexit -o nounset -o pipefail -o xtrace
 
 [ "${CI_CONFIG+x}" ] && source "$CI_CONFIG"
 
-nix-shell --pure --keep CI_CONFIG --keep CI_CLEAN "${NIX_ARGS[@]+"${NIX_ARGS[@]}"}" --run ci/scripts/ci.sh shell.nix
+nix develop --ignore-environment --keep CI_CONFIG --keep CI_CLEAN "${NIX_ARGS[@]+"${NIX_ARGS[@]}"}" -f shell.nix --command ci/scripts/ci.sh