cache deb files

.github/workflows/tests.yml

@@ -6,14 +6,28 @@ jobs:
     #if: github.event_name == 'workflow_dispatch'
     runs-on: ubuntu-latest
     steps:
+    - name: Cache deb files
+      uses: actions/cache@v3
+      env:
+        cache-name: opensc-deb
+      with:
+        path: opensc*.deb
+        key: ${{ runner.os }}-${{ env.cache-name }}
+    - name: Check file existence
+      id: check_deb_files
+      uses: andstor/file-existence-action@v1
+      with:
+        files: "opensc*.deb"
     - name: Package Install
+      if: steps.check_deb_files.outputs.files_exists == 'false'
       run: |
         sudo sed -i 's/^# deb-src/deb-src/' /etc/apt/sources.list  
         sudo apt-get update
         sudo apt-get install -q -y git gcc g++ cmake swig psmisc procps debian-keyring devscripts
         sudo apt-get build-dep -q -y opensc
         sudo rm -f /usr/bin/clang-tidy
     - name: Build the package
+      if: steps.check_deb_files.outputs.files_exists == 'false'
       run: |
         dget http://archive.ubuntu.com/ubuntu/pool/universe/o/opensc/opensc_0.23.0-0.1ubuntu1.dsc  
         cd opensc-0.23.0
@@ -30,6 +44,7 @@ jobs:
   build_test:
     name: Build and Test
     runs-on: ubuntu-latest
+    needs: build_opensc
     steps:
     - name: Download backport OpenSC package
       uses: actions/download-artifact@v3