'Generic Commit'

Dockerfile.dropshell-build

@@ -15,9 +15,17 @@ ENV CCACHE_DIR=/ccache
 ENV CCACHE_COMPILERCHECK=content
 ENV CCACHE_MAXSIZE=2G
 
-COPY . .
+# Copy only build files first (for better layer caching)
+COPY CMakeLists.txt cmake_prebuild.sh ./
+COPY src/version.hpp.in src/
 
-# Configure and build with ccache using cache mounts
+# Run prebuild script early (this rarely changes)
+RUN bash cmake_prebuild.sh
+
+# Copy source files (this invalidates cache when source changes)
+COPY src/ src/
+
+# Configure project (this step is cached unless CMakeLists.txt changes)
 RUN --mount=type=cache,target=/ccache \
     --mount=type=cache,target=/build \
     mkdir -p /build && \
@@ -38,11 +46,12 @@ RUN --mount=type=cache,target=/ccache \
     -DOPENSSL_INCLUDE_DIR=/usr/local/include \
     ${CMAKE_TOOLCHAIN_FILE:+-DCMAKE_TOOLCHAIN_FILE=$CMAKE_TOOLCHAIN_FILE}
 
-# Build with cache mounts
+# Run prebuild script
 RUN --mount=type=cache,target=/ccache \
     --mount=type=cache,target=/build \
     cmake --build /build --target run_prebuild_script
 
+# Build project (ccache will help here when only some files change)
 RUN --mount=type=cache,target=/ccache \
     --mount=type=cache,target=/build \
     cmake --build /build