CI: test OpenBSD + FreeBSD in Linux VM

.github/workflows/bsd.yml

@@ -0,0 +1,52 @@
+name: tox
+on: [push, pull_request]
+permissions:
+  # BOLD WARNING: do not add permissions, this workflow executes remote code
+  contents: read
+env:
+  FORCE_COLOR: 1
+concurrency: 
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  freebsd:
+    name: freebsd
+    timeout-minutes: 20
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v4
+      - uses: vmactions/freebsd-vm@v1
+        prepare: pkg install -y python
+        usesh: true
+        copyback: false
+        run: |
+          uname -a \
+          && pkg info python \
+          && python -m pip install --upgrade pip \
+          && python -m pip install tox \
+          && tox -e run-module \
+          && tox -e run-entrypoint \
+          && tox -e py
+
+  openbsd:
+    name: openbsd
+    timeout-minutes: 20
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v4
+      - uses: vmactions/openbsd-vm@v1
+        prepare: pkg_add python
+        usesh: true
+        copyback: false
+        run: |
+          uname -a \
+          && pkg_info python \
+          && python -m pip install --upgrade pip \
+          && python -m pip install tox \
+          && tox -e run-module \
+          && tox -e run-entrypoint \
+          && tox -e py