build: introduce multi stage builds

Author: yutaro-sakamoto

Dockerfile

@@ -1,49 +1,78 @@
-FROM almalinux:9
+# Builder stage
+FROM almalinux:9 AS builder
 
 SHELL ["/bin/bash", "-c"]
 
-# classpath settings
-ENV CLASSPATH=:/usr/lib/opensourcecobol4j/libcobj.jar:/usr/lib/Open-COBOL-ESQL-4j/postgresql.jar:/usr/lib/opensourcecobol4j/ocesql4j.jar
-RUN echo 'export CLASSPATH=:/usr/lib/opensourcecobol4j/libcobj.jar:/usr/lib/Open-COBOL-ESQL-4j/postgresql.jar:/usr/lib/Open-COBOL-ESQL-4j/ocesql4j.jar' >> ~/.bashrc
+# Install build dependencies
+RUN dnf update -y && \
+    dnf install -y gcc make bison flex automake autoconf diffutils gettext java-11-openjdk-devel curl gzip tar && \
+    dnf clean all
 
-# install dependencies
-RUN dnf update -y
-RUN dnf install -y gcc make bison flex automake autoconf diffutils gettext java-11-openjdk-devel
+# Install sbt
+RUN curl -fL https://github.com/coursier/coursier/releases/latest/download/cs-x86_64-pc-linux.gz | gzip -d > cs && \
+    chmod +x cs && \
+    echo Y | ./cs setup
 
-# install sbt
-RUN curl -fL https://github.com/coursier/coursier/releases/latest/download/cs-x86_64-pc-linux.gz | gzip -d > cs && chmod +x cs && echo Y | ./cs setup
+# Set PATH for sbt
+ENV PATH="$PATH:/root/.local/share/coursier/bin"
 
-# install opensourcecobol4j
-RUN cd /root &&\
-    curl -L -o opensourcecobol4j-v1.1.7.tar.gz https://github.com/opensourcecobol/opensourcecobol4j/archive/refs/tags/v1.1.7.tar.gz &&\
-    tar zxvf opensourcecobol4j-v1.1.7.tar.gz &&\
-    cd opensourcecobol4j-1.1.7 &&\
-    ./configure --prefix=/usr/ &&\
-    make &&\
-    make install &&\
-    rm /root/opensourcecobol4j-v1.1.7.tar.gz
+# Build opensourcecobol4j
+RUN cd /tmp && \
+    curl -L -o opensourcecobol4j-v1.1.7.tar.gz https://github.com/opensourcecobol/opensourcecobol4j/archive/refs/tags/v1.1.7.tar.gz && \
+    tar zxf opensourcecobol4j-v1.1.7.tar.gz && \
+    cd opensourcecobol4j-1.1.7 && \
+    ./configure --prefix=/usr/ && \
+    make && \
+    make install
 
-# Install Open COBOL ESQL 4J
-ENV PATH="$PATH:/root/.local/share/coursier/bin"
-RUN mkdir -p /usr/lib/Open-COBOL-ESQL-4j &&\
-    cd /root/ &&\
-    curl -L -o Open-COBOL-ESQL-4j-1.1.1.tar.gz https://github.com/opensourcecobol/Open-COBOL-ESQL-4j/archive/refs/tags/v1.1.1.tar.gz &&\
-    tar zxvf Open-COBOL-ESQL-4j-1.1.1.tar.gz &&\
-    rm Open-COBOL-ESQL-4j-1.1.1.tar.gz &&\
-    cd Open-COBOL-ESQL-4j-1.1.1 &&\
-    mkdir -p /usr/lib/Open-COBOL-ESQL-4j/ &&\
-    curl -L -o /usr/lib/Open-COBOL-ESQL-4j/postgresql.jar https://jdbc.postgresql.org/download/postgresql-42.2.24.jar &&\
-    cp /usr/lib/opensourcecobol4j/libcobj.jar dblibj/lib &&\
-    cp /usr/lib/Open-COBOL-ESQL-4j/postgresql.jar dblibj/lib &&\
-    ./configure --prefix=/usr/ &&\
-    make &&\
-    make install &&\
-    rm -rf /root/Open-COBOL-ESQL-4j-1.1.1
-
-# add sample programs
+# Build Open COBOL ESQL 4J
+RUN mkdir -p /usr/lib/Open-COBOL-ESQL-4j && \
+    cd /tmp && \
+    curl -L -o Open-COBOL-ESQL-4j-1.1.1.tar.gz https://github.com/opensourcecobol/Open-COBOL-ESQL-4j/archive/refs/tags/v1.1.1.tar.gz && \
+    tar zxf Open-COBOL-ESQL-4j-1.1.1.tar.gz && \
+    cd Open-COBOL-ESQL-4j-1.1.1 && \
+    curl -L -o /usr/lib/Open-COBOL-ESQL-4j/postgresql.jar https://jdbc.postgresql.org/download/postgresql-42.2.24.jar && \
+    cp /usr/lib/opensourcecobol4j/libcobj.jar dblibj/lib && \
+    cp /usr/lib/Open-COBOL-ESQL-4j/postgresql.jar dblibj/lib && \
+    ./configure --prefix=/usr/ && \
+    make && \
+    make install
+
+# Runtime stage
+FROM almalinux:9
+
+SHELL ["/bin/bash", "-c"]
+
+# Install only runtime dependencies
+RUN dnf update -y && \
+    dnf install -y java-11-openjdk-headless && \
+    dnf clean all
+
+# Copy installed files from builder
+# Copy opensourcecobol4j executables
+COPY --from=builder /usr/bin/cobj /usr/bin/
+COPY --from=builder /usr/bin/cobjrun /usr/bin/
+COPY --from=builder /usr/bin/cob-config /usr/bin/
+COPY --from=builder /usr/bin/cobj-idx /usr/bin/
+COPY --from=builder /usr/bin/cobj-api /usr/bin/
+# Copy Open COBOL ESQL 4J executable
+COPY --from=builder /usr/bin/ocesql4j /usr/bin/
+# Copy JAR libraries
+COPY --from=builder /usr/lib/opensourcecobol4j/ /usr/lib/opensourcecobol4j/
+COPY --from=builder /usr/lib/Open-COBOL-ESQL-4j/ /usr/lib/Open-COBOL-ESQL-4j/
+# Copy configuration and copy files
+COPY --from=builder /usr/share/opensource-cobol-4j-1.1.8-hotfix1/ /usr/share/opensource-cobol-4j-1.1.8-hotfix1/
+# Copy header file
+COPY --from=builder /usr/include/libcobj.h /usr/include/
+
+# Set classpath
+ENV CLASSPATH=:/usr/lib/opensourcecobol4j/libcobj.jar:/usr/lib/Open-COBOL-ESQL-4j/postgresql.jar:/usr/lib/Open-COBOL-ESQL-4j/ocesql4j.jar
+RUN echo 'export CLASSPATH=:/usr/lib/opensourcecobol4j/libcobj.jar:/usr/lib/Open-COBOL-ESQL-4j/postgresql.jar:/usr/lib/Open-COBOL-ESQL-4j/ocesql4j.jar' >> ~/.bashrc
+
+# Add sample programs
 ADD cobol_sample /root/cobol_sample
 ADD ocesql4j_sample /root/ocesql4j_sample
 
 WORKDIR /root/
 
-CMD ["/bin/bash"]
+CMD ["/bin/bash"]