feat(ci): clear ccache stats in docker image

.github/workflows/continuous-integration.yml

@@ -79,7 +79,6 @@ jobs:
 
       - name: Build and test compiler
         if: ${{ matrix.compiler == 'gcc7' }}
-        id: build-compiler
         uses: addnab/docker-run-action@v3
         with:
           registry: ghcr.io
@@ -92,8 +91,6 @@ jobs:
           shell: bash
           run: |
             set -e
-            echo "Debug: ccache statistics (prior to the build):"
-            ccache -s
             cd /compiler
             rm -rf /build
             /opt/python/cp38-cp38/bin/pip install pytest
@@ -131,8 +128,6 @@ jobs:
           shell: bash
           run: |
             set -e
-            echo "Debug: ccache statistics (prior to the build):"
-            ccache -s
             cd /compiler
             export PYTHONPATH=""
             make CCACHE=ON BUILD_DIR=/build concretecompiler python-bindings doc

builders/Dockerfile.concrete-compiler-df-env

@@ -39,3 +39,4 @@ RUN make PARALLEL_EXECUTION_ENABLED=ON BUILD_DIR=/build CCACHE=ON \
 ENV PYTHONPATH "$PYTHONPATH:/build/tools/concretelang/python_packages/concretelang_core"
 ENV PATH "$PATH:/build/bin"
 ENV RT_LIB "/build/lib/libConcretelangRuntime.so"
+RUN ccache -z

builders/Dockerfile.concrete-compiler-env

@@ -29,3 +29,4 @@ RUN make BUILD_DIR=/build CCACHE=ON concretecompiler python-bindings && \
 ENV PYTHONPATH "$PYTHONPATH:/build/tools/concretelang/python_packages/concretelang_core"
 ENV PATH "$PATH:/build/bin"
 ENV RT_LIB "/build/lib/libConcretelangRuntime.so"
+RUN ccache -z

builders/Dockerfile.concrete-compiler-gcc7-env

@@ -28,3 +28,4 @@ WORKDIR /compiler
 RUN mkdir -p /build
 RUN make -e CXX_COMPILER=$CXX CC_COMPILER=$CC BUILD_DIR=/build Python3_EXECUTABLE=/opt/python/${python_tag}/bin/python CCACHE=ON python-bindings concretecompiler
 ENV PATH "$PATH:/build/bin"
+RUN ccache -z