I'm trying to create a Maven POM which will pull in the correct version of alpn-boot when building the project and running the tests.
The whole thing works if I'm injecting the property from "outside" when running the build (e. g. via mvn -Dalpn-boot.version=8.1.8.v20160420 test
or as an environment variable) but not when trying to interpolate it inside the POM using ${java.version}
.
I've tried using properties-maven-plugin to accomplish this with the following settings in the pom.xml
file (snippet):
<project>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>properties-maven-plugin</artifactId>
<version>1.0.0</version>
<executions>
<execution>
<phase>initialize</phase>
<goals>
<goal>read-project-properties</goal>
</goals>
<configuration>
<files>
<file>${project.basedir}/alpn-boot/jdk-${java.version}.properties</file>
</files>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.mortbay.jetty.alpn</groupId>
<artifactId>alpn-boot</artifactId>
<version>${alpn-boot.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
Contents of one of the properties files:
$ cat alpn-boot/jdk-1.8.0_92.properties
alpn-boot.version=8.1.8.v20160420
Basically the same problem with the gmaven-plugin
:
<plugin>
<groupId>org.codehaus.groovy.maven</groupId>
<artifactId>gmaven-plugin</artifactId>
<version>1.0</version>
<executions>
<execution>
<phase>initialize</phase>
<goals>
<goal>execute</goal>
</goals>
<configuration>
<source>
alpnVersions = [ '1.8.0_92': '8.1.8.v20160420' ]
project.properties['alpn-boot.version'] = alpnVersions[System.getProperty('java.version')]
</source>
</configuration>
</execution>
</executions>
</plugin>
With both approaches I get the following error message:
[INFO] Scanning for projects...
[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[ERROR] 'dependencies.dependency.version' for org.mortbay.jetty.alpn:alpn-boot:jar must be a valid version but is '${alpn-boot.version}'. @ org.example:my-project:[unknown-version], /path/to/pom.xml, line 132, column 22
@
[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]
[ERROR] The project org.example:my-project:1.0.0-rc3-SNAPSHOT (/path/to/pom.xml) has 1 error
[ERROR] 'dependencies.dependency.version' for org.mortbay.jetty.alpn:alpn-boot:jar must be a valid version but is '${alpn-boot.version}'. @ org.example:my-project:[unknown-version], /path/to/pom.xml, line 132, column 22
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException
I ended up following the advice of @khmarbaise and add a Maven profile for each version of the JDK which needs to be supported:
<properties>
<!-- Default alpn-boot version. See <profiles> for specific profiles. -->
<alpn-boot.version>8.1.3.v20150130</alpn-boot.version>
</properties>
<dependencies>
<dependency>
<groupId>org.mortbay.jetty.alpn</groupId>
<artifactId>alpn-boot</artifactId>
<version>${alpn-boot.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<!-- Profiles for selecting the correct version of alpn-boot for each JDK.
see http://www.eclipse.org/jetty/documentation/current/alpn-chapter.html for reference. -->
<profiles>
<profile>
<id>jdk-1.8.0</id>
<activation>
<jdk>1.8.0</jdk>
</activation>
<properties>
<alpn-boot.version>8.1.0.v20141016</alpn-boot.version>
</properties>
</profile>
<!-- Lots of profiles [...] -->
<profile>
<id>jdk-1.8.0_92</id>
<activation>
<jdk>1.8.0_92</jdk>
</activation>
<properties>
<alpn-boot.version>8.1.8.v20160420</alpn-boot.version>
</properties>
</profile>
</profiles>