chore(ci): add CI workflow for OpenBSD (aws#3754)

.github/s2n_openbsd.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License").
+# You may not use this file except in compliance with the License.
+# A copy of the License is located at
+#
+#  http://aws.amazon.com/apache2.0
+#
+# or in the "license" file accompanying this file. This file is distributed
+# on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+# express or implied. See the License for the specific language governing
+# permissions and limitations under the License.
+#
+set -eu
+export CTEST_PARALLEL_LEVEL=$(sysctl -n hw.ncpuonline)
+
+cmake . -Brelease -GNinja -DCMAKE_BUILD_TYPE=Release
+cmake --build ./release -j $CTEST_PARALLEL_LEVEL
+ninja -C release test
+cmake --build ./release --target clean #Saves on copy back rsync time
+
+cmake . -Bbuild -GNinja -DCMAKE_BUILD_TYPE=Debug
+cmake --build ./build -j $CTEST_PARALLEL_LEVEL
+ninja -C build test
+cmake --build ./build --target clean #Saves on copy back rsync time

.github/workflows/ci_openbsd.yml

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+name: OpenBSD
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  testopenbsd:
+    runs-on: macos-12
+    name: CI OpenBSD
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build and test in OpenBSD
+        id: test
+        uses: vmactions/[email protected]
+        with:
+          mem: 2048
+          prepare: |
+            # The / (root) mount point in the VM doesn't have enough disk
+            # space to build the project. These commands put the actual 'work'
+            # directory in the /home mount (which has lots of disk space) and
+            # creates symlinks to 'work' in the locations that the runner uses
+            # when copying artifacts back and forth between the VM and macOS
+            # host.
+            mv /Users/runner /home
+            rm -rf /Users
+            ln -s /home /Users
+            ln -sf /home/work /root/work
+            pkg_add ninja cmake
+            pkg_info
+          run: |
+            sysctl -n kern.version
+            .github/s2n_openbsd.sh
+      - name: upload test results
+        if: always()
+        uses: actions/upload-artifact@master
+        with:
+          name: all_test_output
+          path: |
+            release/testing/temporary
+            build/testing/temporary