feat: add goss testing for the docker image

.github/workflows/atlantis-image.yml

@@ -148,6 +148,51 @@ jobs:
         labels: ${{ steps.meta.outputs.labels }}
         outputs: type=image,name=target,annotation-index.org.opencontainers.image.description=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.description'] }}
 
+  test:
+    needs: [changes]
+    if: needs.changes.outputs.should-run-build == 'true'
+    name: Test Image With Goss
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        image_type: [alpine, debian]
+    env:
+      # Set docker repo to either the fork or the main repo where the branch exists
+      DOCKER_REPO: ghcr.io/${{ github.repository }}
+
+    steps:
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@d70bba72b1f3fd22344832f00baa16ece964efeb # v3
+        # https://github.com/docker/build-push-action/issues/761#issuecomment-1575006515
+        with:
+          driver-opts: |
+            image=moby/buildkit:v0.13.2
+
+      - name: "Build and load into Docker"
+        if: contains(fromJson('["push", "pull_request"]'), github.event_name)
+        uses: docker/build-push-action@2cdde995de11925a030ce8070c3d77a52ffcf1c0 # v5
+        with:
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          context: .
+          build-args: |
+            ATLANTIS_BASE_TAG_TYPE=${{ matrix.image_type }}
+          push: false
+          load: true
+          tags: "${{ env.DOCKER_REPO }}:goss-test"
+          target: ${{ matrix.image_type }}
+
+      - name: "Setup Goss"
+        uses: e1himself/goss-installation-action@fbb6fb55d3e59c96045b2500eeb8ce0995d99ac1 # v1.2.1
+        with:
+          version: "v0.4.7"
+
+      - name: Execute Goss tests
+        run: |
+          dgoss run --rm ${{ env.DOCKER_REPO }}:goss-test bash -c 'while true; do sleep 1; done;'
+
   skip-build:
     needs: [changes]
     if: needs.changes.outputs.should-run-build == 'false'

goss.yaml

@@ -0,0 +1,37 @@
+# See: https://github.com/goss-org/goss/blob/master/docs/gossfile.md
+
+command:
+  # ensure atlantis is available
+  atlantis-available:
+    exec: "atlantis version"
+    exit-status: 0
+    stdout: []
+    stderr: []
+
+  # ensure conftest is available
+  conftest-available:
+    exec: "conftest -v"
+    exit-status: 0
+    stdout: []
+    stderr: []
+
+  # ensure git-lfs is available
+  git-lfs-available:
+    exec: "git-lfs -v"
+    exit-status: 0
+    stdout: []
+    stderr: []
+
+  # ensure terraform is available
+  terraform-available:
+    exec: "terraform version"
+    exit-status: 0
+    stdout: []
+    stderr: []
+
+  # ensure tofu binary is available
+  tofu-available:
+    exec: "tofu version"
+    exit-status: 0
+    stdout: []
+    stderr: []