Maven building only changed files

Question

Lets say i have module structure like below

     Modules
       ->utils
       ->domain
       ->client
       ->services
       ->deploy (th         


        

Answer 1

For GIT

mvn install -amd -pl $(git status | grep -E "modified:|deleted:|added:" | awk '{print $2}' | cut -f1 -d"/")

OR

In your .bashrc file (.bashrc can be found in home directory ~/.bashrc , or create it if doesn't exists) add the following function.

mvn_changed_modules(){
    [ -z "$1" ] && echo "Expected command : mvn_changed_modules (install/build/clean or any maven command)" && exit 0

        modules=$(git status | grep -E "modified:|deleted:|added:" | awk '{print $2}' | cut -f1 -d"/")

                if [  -z "$modules" ];
                then
                        echo "No changes (modified / deleted / added)  found"
                else
                        echo "Changed modules are : `echo $modules`"
                        mvn $1 -amd -pl $modules
                fi
}

Then after re-starting your bash (command prompt), you can just use the following command from the ROOT directory itself.

smilyface@machine>MainDir]$ mvn_changed_module install

How it works?
As per Question mvn install -amd -pl services is the command when "some changes done in services module". So, first get module name from the changed file(s) and put it as input for mvn-install command

Say for example, below is a list of modified files (output of git status) -
services/pom.xml
services/ReadMe.txt
web/src/java/com/some/Name.java
Then services and web are the modules name which need to be build / compile / install