Add OCI tests to CI

.github/workflows/oci.yml

@@ -0,0 +1,68 @@
+name: oci
+
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    branches: [main]
+
+permissions:
+  contents: read
+  id-token: write
+
+concurrency:
+  group: "${{ github.workflow }}-${{ github.ref }}"
+  cancel-in-progress: true
+
+env:
+  SCCACHE_GHA_ENABLED: "true"
+  SCCACHE_GHA_VERSION: "1"
+
+jobs:
+  oci:
+    runs-on: ubuntu-22.04
+    defaults:
+      run:
+        shell: nix develop .#oci --command bash {0}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@v13
+
+      - name: Setup Nix cache
+        uses: DeterminateSystems/magic-nix-cache-action@v7
+
+      - name: Configure SCCache
+        uses: actions/github-script@v7
+        with:
+          script: |
+            core.exportVariable('ACTIONS_CACHE_URL', process.env.ACTIONS_CACHE_URL);
+            core.exportVariable('ACTIONS_RUNTIME_TOKEN', process.env.ACTIONS_RUNTIME_TOKEN);
+
+      - name: Initialize Nix shell
+        run: nix develop .#oci
+
+      - name: Run OCI tests
+        run: |
+          set -eufo pipefail
+          cd examples/oci
+          cargo build
+          cargo run &
+          PID="${!}"
+          sleep 3
+          oci-distribution-spec-conformance
+          kill "${PID}"
+
+      - name: Upload test results to Codecov
+        if: always() && !cancelled()
+        uses: codecov/test-results-action@v1
+        with:
+          files: examples/oci/junit.xml
+          fail_ci_if_error: true
+          token: "${{ secrets.CODECOV_TOKEN }}"
+
+      - name: Show SCCache stats
+        if: always() && !cancelled()
+        run: sccache --show-stats

CHANGELOG.md

@@ -9,7 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
-- Fleshed out hyper example.
+- Added OCI example.
 
 ### Fixed