GHA CI: use larger cache for compiling

Previous default was 500MB and it couldn't fit all compile results in
it, enlarge it to 2GB. Note that 2GB isn't the actual size stored on the
server, it will be compressed again by zstd and will be a lot smaller.

.github/workflows/ci_ubuntu.yaml

@@ -18,24 +18,18 @@ jobs:
 
       - name: Install dependencies
         run: |
+          sudo add-apt-repository ppa:beineri/opt-qt-5.15.2-focal
           sudo apt update
           sudo apt install \
             build-essential cmake ninja-build pkg-config \
-            libboost-dev libssl-dev zlib1g-dev
-        # sudo apt install libqt5svg5-dev qtbase5-dev qttools5-dev # the Qt version in the standard repositories is too old...
+            libboost-dev libssl-dev qt515base qt515svg qt515tools zlib1g-dev
 
       - name: Setup ccache
         uses: Chocobo1/setup-ccache-action@v1
         with:
           update_packager_index: false
-
-      # this will be installed under /opt/qt515. CMake will still find it automatically without additional hints
-      # to speed up the process, only the required components are installed rather than the full qt515-meta-full metapackage
-      - name: Install Qt
-        run: |
-          sudo add-apt-repository ppa:beineri/opt-qt-5.15.2-focal
-          sudo apt install \
-            qt515base qt515svg qt515tools
+          ccache_options: |
+            max_size=2G
 
       - name: Install libtorrent
         run: |
@@ -63,9 +57,7 @@ jobs:
             -DVERBOSE_CONFIGURE=ON \
             --graphviz=build/target_graph.dot
           cmake --build build
-
-      - name: Install qBittorrent
-        run: sudo cmake --install build
+          sudo cmake --install build
 
       - name: Upload build artifacts
         uses: actions/upload-artifact@v2

.github/workflows/coverity-scan.yml

@@ -15,19 +15,11 @@ jobs:
 
       - name: Install dependencies
         run: |
+          sudo add-apt-repository ppa:beineri/opt-qt-5.15.2-focal
           sudo apt update
           sudo apt install \
             build-essential cmake ninja-build pkg-config \
-            libboost-dev libssl-dev zlib1g-dev
-        # sudo apt install libqt5svg5-dev qtbase5-dev qttools5-dev # the Qt version in the standard repositories is too old...
-
-      # this will be installed under /opt/qt515. CMake will still find it automatically without additional hints
-      # to speed up the process, only the required components are installed rather than the full qt515-meta-full metapackage
-      - name: Install Qt
-        run: |
-          sudo add-apt-repository ppa:beineri/opt-qt-5.15.2-focal
-          sudo apt install \
-            qt515base qt515svg qt515tools
+            libboost-dev libssl-dev qt515base qt515svg qt515tools zlib1g-dev
 
       - name: Install libtorrent
         run: |
@@ -52,7 +44,7 @@ jobs:
           mkdir coverity_tool
           tar xzf coverity_tool.tgz --strip 1 -C coverity_tool
 
-      - name: Configure qBittorrent
+      - name: Build qBittorrent
         run: |
           cmake \
             -B build \
@@ -60,9 +52,6 @@ jobs:
             -DCMAKE_BUILD_TYPE=Release \
             -DGUI=ON \
             -DVERBOSE_CONFIGURE=ON
-
-      - name: Build qBittorrent
-        run: |
           export PATH="$(pwd)/coverity_tool/bin:$PATH"
           cov-build --dir cov-int cmake --build build