CI: migrate FreeBSD job to Github Actions

.cirrus.yml

@@ -4,12 +4,6 @@ task:
   only_if: $CIRRUS_BRANCH == "main" || $CIRRUS_PR != ""
 
   matrix:
-    - name: FreeBSD
-      freebsd_instance:
-        image_family: freebsd-15-0-snap
-      install_script: pkg upgrade -y && pkg install -y base64 cmake json-c openssl pkgconf scrypt vim && sudo python3 -m ensurepip && sudo python3 -m pip install pexpect pytest
-      test_script: uname -sr && python3 --version && mkdir build && cd build && cmake -DENABLE_GUI=OFF .. && cmake --build . && cmake --build . -- check && sudo cmake --build . -- install
-
     - name: Linux, GCC, no GTK
       container:
         image: gcc:15.1

.github/workflows/ci.yml

@@ -0,0 +1,34 @@
+name: Github Actions CI
+permissions: {}
+on:
+  pull_request:
+    branches:
+      - main
+jobs:
+  freebsd15:
+    name: FreeBSD 15.0
+    runs-on: ubuntu-24.04
+    steps:
+    - uses: vmactions/freebsd-vm@7ca82f79fe3078fecded6d3a2bff094995447bbd
+      with:
+        sync: no
+        release: "15.0"
+        usesh: true
+        run: |
+          set -e
+          set -o pipefail
+          set -u
+          set -x
+          uname -rms
+          pkg install -y base64 cmake git json-c openssl pkgconf python3 py311-pexpect py311-pytest scrypt vim
+          python3 --version
+          git clone --no-checkout -- ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY} wd
+          cd wd
+          git fetch -- origin ${{ github.event.pull_request.head.sha }}
+          git checkout FETCH_HEAD
+          export CFLAGS="-Werror -g -fno-omit-frame-pointer -fsanitize=address,undefined -fno-sanitize-recover=address,undefined"
+          export UBSAN_OPTIONS=print_stacktrace=1
+          cmake -DENABLE_GUI=OFF -B build -S .
+          cmake --build build
+          cmake --build build --target check
+          cmake --install build