Run Grunt.js build in Maven

gistfile1.xml

<properties>
  <js.source.dir>${project.basedir}/src/main/js</js.source.dir>
  <js.dist.dir>${js.source.dir}/dist</js.dist.dir>
</properties>

<build>
  <finalName>app name</finalName>
    <plugins>
      <plugin>
        <artifactId>maven-antrun-plugin</artifactId>
        <version>1.7</version>
        <executions>
          <execution>
            <phase>generate-sources</phase>
            <configuration>
              <target name="building">
                <echo>---- NPM INSTALL ----</echo>
                <exec executable="cmd" dir="${js.source.dir}" osfamily="windows" failonerror="true">
                  <arg line="/c npm install"/>
                </exec>
                <exec executable="bash" dir="${js.source.dir}" osfamily="unix" failonerror="true">
                  <arg line="-c 'npm install'"/>
                </exec>
                <echo>---- BOWER INSTALL ----</echo>
                <exec executable="cmd" dir="${js.source.dir}" osfamily="windows" failonerror="true">
                  <arg line="/c npm install"/>
                </exec>
                <exec executable="bash" dir="${js.source.dir}" osfamily="unix" failonerror="true">
                  <arg line="-c 'bower install'"/>
                </exec>
                <echo>---- GRUNT ----</echo>
                <exec executable="cmd" dir="${js.source.dir}" osfamily="windows" failonerror="true">
                  <arg line="/c grunt"/>
                </exec>
                <exec executable="bash" dir="${js.source.dir}" osfamily="unix" failonerror="true">
                  <arg line="-c 'grunt'"/>
                </exec>
              </target>
            </configuration>
            <goals>
              <goal>run</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      
      <!-- Include JS dist directory as webResource -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.4</version>
        <configuration>
          <webResources>
            <resource>
              <directory>${js.dist.dir}</directory>
            </resource>
          </webResources>
        </configuration>
      </plugin>
    </plugins>
  </build>