Adds dockerfile variable to configure air-gapped hosting server as replacement for github.com

external-dependencies/kdreports/Dockerfile

@@ -56,25 +56,28 @@ RUN curl -fsSL http://${RME_ADMINSRV}/rme/deb_and_rpm_signage_key.asc --output /
 ARG QT_VERSION=6.10.2
 ARG KDREPORTS_VERSION=2.3.0
 
+# Air-gapped Harbor registry URL
+ARG HARBOR_URL=https://internal-repo.sl.defence-elec.de
+
 # Install build dependencies
 RUN apt-get update && apt-get install -y --no-install-recommends \
-    build-essential cmake git \
+    build-essential cmake curl \
     libqt6core6 libqt6gui6 libqt6widgets6 libqt6xml6 \
     qt6-base-dev \
     && rm -rf /var/lib/apt/lists/*
 
-# Clone and build KDReports
-RUN git clone --depth 1 --branch kdreports-${KDREPORTS_VERSION} \
-    https://github.com/KDAB/KDReports.git /tmp/KDReports \
-    && cd /tmp/KDReports \
-    && mkdir build && cd build \
-    && cmake -DCMAKE_BUILD_TYPE=Release \
-             -DCMAKE_INSTALL_PREFIX=/usr/local \
-             -DCMAKE_PREFIX_PATH=/opt/Qt/${QT_VERSION}/gcc_64 \
-             -DKDReports_QT6=ON .. \
-    && cmake --build . -j$(nproc) \
-    && cmake --install . \
-    && rm -rf /tmp/KDReports
+# Download and build KDReports from air-gapped Harbor registry
+RUN curl -L -o /tmp/KDReports-2.3.0.tar.gz ${HARBOR_URL}/KDReports-2.3.0.tar.gz && \
+    tar -xzf /tmp/KDReports-2.3.0.tar.gz -C /tmp && \
+    cd /tmp/KDReports && \
+    mkdir build && cd build && \
+    cmake -DCMAKE_BUILD_TYPE=Release \
+          -DCMAKE_INSTALL_PREFIX=/usr/local \
+          -DCMAKE_PREFIX_PATH=/opt/Qt/${QT_VERSION}/gcc_64 \
+          -DKDReports_QT6=ON .. && \
+    cmake --build . -j$(nproc) && \
+    cmake --install . && \
+    rm -rf /tmp/KDReports-2.3.0.tar.gz /tmp/KDReports
 
 # Create header alias for legacy includes
 RUN ln -sfn /usr/local/include/KDReports-qt6 /usr/local/include/KDReports