we require the software version number of a maven project both in the java code and in the NSIS installer script. Following the DRY principle, the version number should be stored in the maven pom only. What is the best way to get this version number in the Java code as well as in the NSIS script? Updates on the version number should of course be distributed without the developer having to care about it.
The current approach: Wherever the version number is needed, ${"versionNr"} is inserted as a substitute. Then, during the maven build phase, all java and NSIS source files are filtered and the key is replaced by the version number. To avoid changes in the checked in source code, the filtered files are actually copied to a different location not within the scm. Having the original source and the source filtered by maven causes a lot of confusion, which I would like to avoid.
Any hints?
I typically put the version parameter (like ${project.version}) in a properties-file and only apply filtering on that one file in the maven build. Like
app.version=${project.version}
Then I use this properties file in the code to get the version.