Add ccache

.ci/qt5_14/Dockerfile

@@ -3,6 +3,7 @@ MAINTAINER Matthias Kuhn <matthias@opengis.ch>
 
 RUN dnf -y install \
     bison \
+    ccache \
     clang \
     clazy \
     exiv2-devel \

.ci/qt5_14/build.sh

@@ -3,9 +3,10 @@
 mkdir /usr/src/qgis/build
 cd /usr/src/qgis/build || exit -1
 
+ccache -S
 
 cmake -GNinja \
- -DUSE_CCACHE=OFF \
+ -DUSE_CCACHE=ON \
  -DWITH_QUICK=ON \
  -DWITH_3D=ON \
  -DWITH_STAGED_PLUGINS=ON \
@@ -31,5 +32,6 @@ cmake -GNinja \
  -DWERROR=TRUE \
  ..
 
-
 ninja
+
+ccache -S

.github/workflows/qt5_14.yml

@@ -21,6 +21,14 @@ jobs:
         run: |
           docker build -t qgis_build_deps -f .ci/qt5_14/Dockerfile .
 
+
+      - name: Cache
+        id: cache
+        uses: actions/cache@v2
+        with:
+          path: ~/.ccache
+          key: qt514
+
       - name: Run build
         run: |
-          docker run -v $(pwd):/usr/src/qgis qgis_build_deps /usr/src/qgis/.ci/qt5_14/build.sh
+          docker run -v ~/.ccache:/root/ccache -v $(pwd):/usr/src/qgis qgis_build_deps /usr/src/qgis/.ci/qt5_14/build.sh