CSS preprocessors are useful tools to build coherent CSS files. SASS is one of them.
To use it with Maven, we’ll use this SASS maven plugin
<build>
<plugins>
<plugin>
<groupId>org.jasig.maven</groupId>
<artifactId>sass-maven-plugin</artifactId>
<configuration>
<sassSourceDirectory>${project.basedir}/src/main/resources/sass</sassSourceDirectory>
<outputDirectory>${project.build.directory}/generated-html/v1/css</outputDirectory>
<baseOutputDirectory>${project.build.directory}/generated-html/v1/css</baseOutputDirectory>
</configuration>
</plugin>
</plugins>
</build>