Add ccache to native JAR CI builds

Signed-off-by: kshackleton1 <kshackleton1@bloomberg.net>

Author: kennethshackleton

.github/workflows/continuous-integration.yml

@@ -43,13 +43,13 @@ jobs:
           if [ "${{ runner.os }}" = "Linux" ]; then
             if command -v apk > /dev/null 2>&1; then
               apk update
-              apk add --no-cache bash git gcc g++ musl-dev make curl tar sed gnupg file perl linux-headers cmake diffutils tcl unzip openjdk17
+              apk add --no-cache bash git gcc g++ musl-dev make curl tar sed gnupg file perl linux-headers cmake diffutils tcl unzip openjdk17 ccache
             else
               dnf update -y
-              dnf install -y git gcc gcc-c++ libstdc++-static glibc-devel make curl tar sed bash gnupg file perl kernel-headers cmake diffutils tcl unzip
+              dnf install -y git gcc gcc-c++ libstdc++-static glibc-devel make curl tar sed bash gnupg file perl kernel-headers cmake diffutils tcl unzip ccache
             fi
           elif [ "${{ runner.os }}" = "macOS" ]; then
-            brew install make tcl-tk mimalloc
+            brew install make tcl-tk mimalloc ccache
           elif [ "${{ runner.os }}" = "Windows" ]; then
             choco install mingw make magicsplat-tcl-tk -y --no-progress
           fi
@@ -159,6 +159,20 @@ jobs:
           path: OpenSSL/build
           key: openssl-${{ matrix.platform }}-${{ hashFiles('OpenSSL/openssl.properties', 'OpenSSL/build.gradle.kts', 'OpenSSL/build_libraries.sh') }}
 
+      - name: 'ccache'
+        if: runner.os != 'Windows'
+        uses: actions/cache@v5
+        with:
+          path: ~/.cache/ccache
+          key: ccache-${{ matrix.platform }}
+          restore-keys: ccache-${{ matrix.platform }}-
+
+      - name: 'Configure ccache'
+        if: runner.os != 'Windows'
+        run: |
+          ccache --set-config=max_size=300M
+          ccache --zero-stats
+
       - name: 'Configure Gradle'
         run: |
           echo 'org.gradle.caching=false' >> gradle.properties
@@ -180,6 +194,10 @@ jobs:
           fi
           ./gradlew :selekt-sqlite3-sqlcipher:jar
 
+      - name: 'ccache stats'
+        if: runner.os != 'Windows'
+        run: ccache --show-stats
+
       - name: 'Verify native library'
         run: |
           LIB=$(find SQLite3/build/intermediates/libs \( -name 'libselekt.*' -o -name 'selekt.dll' \) -type f | head -1)