Building JavaFx application using Bitbucket pipelines - maven

Question

I am trying to build JavaFx project using bitbucket pipelines. For that I am using maven:3-jdk-8 docker image. This Docker image uses OpenJDK 8 instead of Oracle's one (due to the lincensing issue) which does not include the JavaFx part. Note that I have to use Java 8 to build my project!
Problem that I am getting is that I am not able to build the application using that docker image alone.
As proposed in an answer to the same question (https://stackoverflow.com/a/40167253/2000338):
I tried using this bitbucket-pipelines.yml to try to overcome the situation:
image: maven:3-jdk-8
pipelines:
default:
- step:
script: # Modify the commands below to build your repository.
- apt-get update
- apt-get install -y openjfx
- mvn clean install # -B batch mode makes Maven less verbose
In step 2 it seems that openjfx is installed properly.
But in step 3 I am getting following error:
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.0:compile (default-compile) on project ***********: Compilation failure: Compilation failure:
[ERROR] /opt/atlassian/pipelines/agent/build/src/main/java/********/******/****/MainFx.java:[7,26] package javafx.application does not exist
It seams that it is still complaining on the JavaFx libraries missing, but I am not aware of why.
On my developer machine (Windows 7, jdk1.8.0_221) I can execute maven build without an issue.

Answer 1

What was missing in previous approach is that the javafx library was not on the classpath. Basically in order to make maven build work I had to add the jfxrt.jar to the classpath.
I found that in the maven:3-jdk-8 image after installing javafx the library can be found in:
/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext/jfxrt.jar
Adding this file to a classpath during build run will do the trick.
One idea (that worked for me) is to include this library in application pom/dependecy part as a system scope.
In my case I made a maven profile for that:
<profiles>
<profile>
<id>docker_build</id>
<activation>
<activeByDefault>false</activeByDefault>
</activation>
<dependencies>
<dependency>
<groupId>com.oracle</groupId>
<artifactId>javaFX</artifactId>
<version>2.2</version>
<scope>system</scope>
<systemPath>${javafx-location}</systemPath>
</dependency>
</dependencies>
</profile>
</profiles>
In order to run this maven build you have to issue proper maven command to add this profile. E.g.
mvn clean install -P docker_build -Djavafx-location=/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext/jfxrt.jar
To simplify this I made a Docker image using following Dockerfile:
FROM maven:3-jdk-8
RUN apt-get update && \
apt-get install -y --no-install-recommends openjfx
COPY settings.xml /root/.m2/
which uses following maven settings.xml file:
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
https://maven.apache.org/xsd/settings-1.0.0.xsd">
<localRepository>/usr/share/maven/ref/repository</localRepository>
<activeProfiles>
<activeProfile>docker_build</activeProfile>
</activeProfiles>
<profiles>
<profile>
<id>docker_build</id>
<properties>
<javafx-location>/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext/jfxrt.jar</javafx-location>
</properties>
</profile>
</profiles>
</settings>
I also published it to the Docker hub if somebody may find it useful:
https://hub.docker.com/r/brzigonzales/maven-javafx