wip: Playing with github actions

.github/workflows/integration.yml

@@ -0,0 +1,50 @@
+on: [push, pull_request]
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+env:
+  IMAGE_CACHE_PATH: /tmp/.image-cache
+  IMAGE_CACHE_NAME: zsh-autosuggestions-test
+jobs:
+  # Load the ZSH_VERSIONS file as a JSON array to use as a matrix
+  # See https://stackoverflow.com/a/62953566/154703
+  determine-versions:
+    runs-on: ubuntu-22.04
+    outputs:
+      versions: ${{ steps.versions.outputs.versions }}
+    steps:
+    - uses: actions/checkout@v3
+    - id: versions
+      run: |
+        echo "versions=$(
+          grep "^[^#]" ZSH_VERSIONS \
+          | sed -E 's/(^|$)/"/g' \
+          | paste -sd ',' - \
+          | sed -e 's/^/[/' -e 's/$/]/'
+        )" >> $GITHUB_OUTPUT
+  test:
+    needs: determine-versions
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        version: ${{ fromJson(needs.determine-versions.outputs.versions) }}
+    steps:
+    - uses: actions/checkout@v3
+    - id: image-cache
+      uses: actions/cache@v3
+      with:
+        path: ${{ env.IMAGE_CACHE_PATH }}
+        key: image-cache-${{ hashFiles('Dockerfile', 'ZSH_VERSIONS') }}
+    - if: steps.image-cache.outputs.cache-hit
+      run: gunzip < $IMAGE_CACHE_PATH/$IMAGE_CACHE_NAME.tar.gz | docker load
+    - if: !steps.image-cache.outputs.cache-hit
+      run: docker build -t $IMAGE_CACHE_NAME .
+    - run: |
+        docker run -it --rm \
+          -e TEST_ZSH_BIN=zsh-${{ matrix.version }} \
+          -v $PWD:/zsh-autosuggestions $IMAGE_CACHE_NAME \
+          make test
+    - if: !steps.image-cache.outputs.cache-hit
+      run: |
+        mkdir -p $IMAGE_CACHE_PATH
+        docker save $IMAGE_CACHE_NAME | gzip > $IMAGE_CACHE_PATH/$IMAGE_CACHE_NAME.tar.gz