Hi list, I've seen some strange behavior with pom property replacement and I was wondering if this is a bug or expected behaviour.
I have a sample project[1] with the build-helper-maven-plugin which I try to configure to use the regex-property goal. Since Java 7 the Regexp matcher of Java understands named groups, but they use the same notation as Maven properties, i.e. ${name} I tried: <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>build-helper-maven-plugin</artifactId> <configuration> <replacement>${regexVersion}${regexGroupId}</replacement> </configuration> </plugin> I expected Maven to not touch my variables if it couldn't replace them. So I was a little confused when I executed mvn -X and saw the following output: [DEBUG] (f) replacement = ${regexVersion}null It looks like Maven didn't touch the first variable but it replaced the second with null. First question: is this expected behaviour? Second question: how can I escape variables so that Maven doesn't try to escape them? [1] https://github.com/nickstolwijk/MavenPropReplacement.git With regards, Nick Stolwijk ~~~ Try to leave this world a little better than you found it and, when your turn comes to die, you can die happy in feeling that at any rate you have not wasted your time but have done your best ~~~ Lord Baden-Powell