test: Add pkgsrc build.

Used by NetBSD, but we build on Alpine Linux for speed. Separately, we
will build on NetBSD without pkgsrc, to see whether it compiles and runs
there. That VM build is more expensive and harder to debug, so we keep
the pkgsrc Linux build for development.

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        tool: [autotools, clang-tidy, compcert, cppcheck, doxygen, goblint, infer, freebsd, misra, modules, rpm, slimcc, sparse, tcc, tokstyle]
+        tool: [autotools, clang-tidy, compcert, cppcheck, doxygen, goblint, infer, freebsd, misra, modules, pkgsrc, rpm, slimcc, sparse, tcc, tokstyle]
     runs-on: ubuntu-latest
     steps:
       - name: Set up Docker Buildx

other/docker/pkgsrc/pkgsrc.Dockerfile

@@ -0,0 +1,10 @@
+FROM toxchat/pkgsrc:latest
+
+WORKDIR /work
+COPY . /work/c-toxcore-0.2.18
+RUN ["tar", "zcf", "c-toxcore.tar.gz", "c-toxcore-0.2.18"]
+
+WORKDIR /work/pkgsrc/chat/toxcore
+RUN ["bmake", "clean"]
+RUN ["bmake", "DISTFILES=c-toxcore.tar.gz", "DISTDIR=/work", "NO_CHECKSUM=yes"]
+RUN ["bmake", "install"]

other/docker/pkgsrc/pkgsrc.Dockerfile.dockerignore

@@ -0,0 +1,23 @@
+# ===== common =====
+# Ignore everything ...
+**/*
+# ... except sources
+!**/*.[ch]
+!**/*.cc
+!**/*.hh
+!CHANGELOG.md
+!LICENSE
+!README.md
+!auto_tests/data/*
+!other/bootstrap_daemon/bash-completion/**
+!other/bootstrap_daemon/tox-bootstrapd.*
+!other/proxy/*.mod
+!other/proxy/*.sum
+!other/proxy/*.go
+# ... and CMake build files (used by most builds).
+!**/CMakeLists.txt
+!.github/scripts/flags*.sh
+!cmake/*.cmake
+!other/pkgconfig/*
+!other/rpm/*
+!so.version

other/docker/pkgsrc/run

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+. "$(cd "$(dirname "${BASH_SOURCE[0]}")/../sources" && pwd)/run.sh"