Split system and script dockerfiles

Author: JakubVanek

README.md

@@ -6,11 +6,12 @@ A custom Build of OpenJDK 9 Sources for EV3, a Lego Mindstorms Brick using ARM S
 1. Install [Docker](https://docs.docker.com/engine/installation/) for your operating system.
 2. Build the jdk9 cross-compilation environment:
 ```sh
-sudo docker build -t jdk9cross build
+sudo docker build -t ev3dev-lang-java:jdk9-system -f Dockerfile.system  build
+sudo docker build -t ev3dev-lang-java:jdk9-build  -f Dockerfile.scripts build
 ```
 3. Run the newly prepared container. We recommend mounting a host directory to the the `/build` directory in the container. At least 2 GB of free space will be needed.
 ```
-sudo docker run -it -v <path on host, where the sources should be stored>:/build jdk9cross
+sudo docker run -it -v <path on host, where the sources should be stored>:/build ev3dev-lang-java:jdk9-build
 ```
 4. Let's fetch the OpenJDK sources:
 ```

build/Dockerfile.scripts

@@ -0,0 +1,13 @@
+FROM ev3dev-lang-java:jdk9-system
+
+# copy build patches & scripts
+RUN mkdir /opt/jdkcross
+COPY *.patch *.sh /opt/jdkcross/
+RUN chmod +x /opt/jdkcross/*.sh
+
+# this directory should be mounted
+VOLUME /build
+
+USER compiler
+WORKDIR /opt/jdkcross
+CMD ["/bin/bash"] ["--login"]

build/Dockerfile renamed to build/Dockerfile.system

@@ -48,23 +48,11 @@ RUN dpkg --add-architecture armel && \
         mercurial \
         zlib1g-dev
 
-
-# copy build patches & scripts
-RUN mkdir /opt/jdkcross
-COPY *.patch *.sh /opt/jdkcross/
-RUN chmod +x /opt/jdkcross/*.sh
-
-# download JDK >=8
+# download JDK 9
 RUN curl -SL http://download.java.net/java/GA/jdk9/9.0.1/binaries/openjdk-9.0.1_linux-x64_bin.tar.gz | tar -xzC /opt/jdkcross
 
-# this directory should be mounted
-VOLUME /build
-
-# prepare nonroot user
+# prepare a nonroot user
 COPY compiler.sudoers /etc/sudoers.d/compiler
 RUN chmod 0440 /etc/sudoers.d/compiler && \
     adduser --disabled-password --gecos \"\" compiler && \
     usermod -a -G sudo compiler
-USER compiler
-WORKDIR /opt/jdkcross
-CMD ["/bin/bash"] ["--login"]