Add automatic build

Author: JakubVanek

README.md

@@ -16,42 +16,62 @@ The output consists of these parts:
 
 0. Clone/download this repo to your computer.
 1. Install [Docker](https://docs.docker.com/engine/installation/) for your operating system.
-2. Build the jdk cross-compilation environment:
+2. Build the jdk cross-compilation OS:
 ```sh
 sudo docker build -t ev3dev-lang-java:jdk-stretch -f system/Dockerfile  system
+```
+
+### Semi-manual build
+3. Build the jdk cross-compilation environment:
+```sh
 sudo docker build -t ev3dev-lang-java:jdk-build   -f scripts/Dockerfile scripts
 ```
-3. Run the newly prepared container. You have to mount a host directory to the the `/build` directory in the container,
+4. Run the newly prepared container. You have to mount a host directory to the the `/build` directory in the container,
 otherwise the build would get discarded. The final build needs at least 6.5 GB of free space (in the build directory).
 ```
-sudo docker run --rm -it -v <path on host, where the sources should be stored>:/build ev3dev-lang-java:jdk-build
+sudo docker run --rm -it -v $BUILD_DIRECTORY:/build ev3dev-lang-java:jdk-build
 ```
-4. Select the OpenJDK version you want to cross-compile (select only one):
+Please change the `$BUILD_DIRECTORY` to a valid path.
+5. Select the OpenJDK version you want to cross-compile (select only one):
 ```
 export JDKVER=9      # OpenJDK 9 with ARM32 JIT
 export JDKVER=9zero  # OpenJDK 9 with Zero interpreter
 export JDKVER=10     # OpenJDK 10 with ARM32 JIT
 export JDKVER=10zero # OpenJDK 10 with Zero interpreter
 ```
-5. Before we can start the build process, Boot JDK must be downloaded:
+6. Before we can start the build process, Boot JDK must be downloaded:
 ```
 ./prepare.sh
 ```
-6. Now we can download the OpenJDK sources:
+7. Now we can download the OpenJDK sources:
 ```
 ./fetch.sh
 ```
-7. The OpenJDK source tree should be ready. Now you can start the cross-build itself:
+8. The OpenJDK source tree should be ready. Now you can start the cross-build itself:
 ```
 ./build.sh
 ```
-8. Create the zipped images:
+9. Create the zipped images:
 ```
 ./zip.sh
 ```
-9. If the build was successful, JDK packages were created in `/build/jri-ev3.tar.gz`, `/build/jdk-ev3.tar.gz` and `/build/jmods.tar.gz`.
+10. If the build was successful, JDK packages were created in `/build/jri-ev3.tar.gz`, `/build/jdk-ev3.tar.gz` and `/build/jmods.tar.gz`.
 If you have mounted `/build`, you can access the files from the host.
 
+### Automatic build
+3. Build the jdk cross-compilation environment:
+```sh
+sudo docker build -t ev3dev-lang-java:jdk-autobuild -f scripts/Dockerfile.autorun scripts
+```
+4. Run the newly prepared container. You have to mount a host directory to the the `/build` directory in the container,
+otherwise the build would get discarded. The final build needs at least 6.5 GB of free space (in the build directory).
+```
+sudo docker run --rm -it -v $BUILD_DIRECTORY:/build -e JDKVER='X' ev3dev-lang-java:jdk-autobuild
+```
+`X` can be one of `9`, `9zero`, `10` and `10zero`. Please change the `$BUILD_DIRECTORY` to a valid path.
+5. If the build was successful, JDK packages were created in `$BUILD_DIRECTORY/jri-ev3.tar.gz`, `$BUILD_DIRECTORY/jdk-ev3.tar.gz` and `$BUILD_DIRECTORY/jmods.tar.gz`.
+
+
 ## ~~JShell on the EV3~~
 
 No longer supported. JShell backend on the EV3 is a huge overkill.

scripts/Dockerfile.autorun

@@ -0,0 +1,12 @@
+FROM ev3dev-lang-java:jdk-stretch
+
+# copy build patches & scripts
+COPY *.patch *.sh /opt/jdkcross/
+RUN chmod +x /opt/jdkcross/*.sh
+
+# this directory should be mounted
+VOLUME /build
+
+USER compiler
+WORKDIR /opt/jdkcross
+CMD ["/opt/jdkcross/autorun.sh"]

scripts/autorun.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+set -e
+
+cd "$(dirname ${BASH_SOURCE[0]})"
+
+./prepare.sh
+./fetch.sh
+./build.sh
+./zip.sh