Maven Modules + Building a Single Specific Module
build-process, java, maven-2
Solution
Any best practices here?
Use the Maven advanced reactor options, more specifically:
-pl, --projects
Build specified reactor projects instead of all projects
-am, --also-make
If project list is specified, also build projects required by the list
So just `cd` into the parent P directory and run:
mvn install -pl B -am
And this will build B and the modules required by B.
Note that you need to use a colon if you are referencing an `artifactId` which differs from the directory name:
mvn install -pl :B -am
As described here:
- Define modules list which shall be build in Maven multiproject build
Problem
I have a multi-module Maven project with a parent project `P` and three sub-modules `A`, `B`, and `C`. Both `B` and `C` are war projects and both depend on `A`. I can type `mvn compile` in `P` and have all of the sub-modules properly compiled. The problem comes when I want to do operations for specific modules. I'd like to be able to package a war for project `B`, but when I run the package command from `B`'s directory, it complains that it can't find the dependencies for `A`. I understand from this question: Maven and dependent modules that perhaps Maven isn't really designed for this type of dependency resolution, but that begs the question of how do I package `B`? Do I have to run `mvn package` for the entire project hierarchy when I really just want `B`? Do I have to install snapshots of A into my local repository every time I want to package `B`? This second scenario isn't much fun when `A` is still under active development. Any best practices here?