Create a final build stage with just the libs and bins

Copy the necessary libraries and binaries from the build stage into a
final stage on debian:bullseye-slim. That source code and build tools
(gcc) aren't being carried around unnecessarily.

This cuts the image size from about 1.5 GB to 180 MB.

Author: kinghuang

Dockerfile

@@ -22,12 +22,34 @@ RUN ./autogen.sh && ./configure
 RUN make -j4
 RUN make install
 
-# Expose binaries
-ENV PATH /usr/local/src/hdt-cpp/libhdt/tools:$PATH
+FROM debian:bullseye-slim
 
-# reset WORKDIR
-WORKDIR /
+# Install runtime dependencies
+RUN apt update; \
+    apt install -y --no-install-recommends \
+		libserd-0-0 \
+	; \
+	rm -rf /var/lib/apt/lists/*;
 
-# Default command
-CMD ["/bin/echo", "Available commands: rdf2hdt hdt2rdf hdtSearch"]
+# Copy in libraries and binaries from build stage.
+COPY --from=build \
+        /usr/local/lib/libcds* \
+		/usr/local/lib/libhdt* \
+		/usr/local/lib/
+COPY --from=build \
+        /usr/local/lib64/libstdc++.* \
+		/usr/local/lib64/
+COPY --from=build \
+		/usr/local/bin/hdt2rdf \
+		/usr/local/bin/hdtInfo \
+		/usr/local/bin/hdtSearch \
+		/usr/local/bin/modifyHeader \
+		/usr/local/bin/rdf2hdt \
+		/usr/local/bin/replaceHeader \
+		/usr/local/bin/searchHeader \
+		/usr/local/bin/
 
+# Add /usr/local/lib to LD_LIBRARY_PATH.
+ENV LD_LIBRARY_PATH=/usr/local/lib:/usr/local/lib64:$LD_LIBRARY_PATH
+
+CMD ["/bin/echo", "Available commands: rdf2hdt hdt2rdf hdtSearch"]