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Maven profile snippet for smart appengine devserver restarts. It copies static files from src/main/webapp to target directory every time a change is detected. It also synchronizes compiled classes causing the Devserver to restart every time classes are changed.
<profile>
<id>m2e</id>
<activation>
<property>
<name>m2e.version</name>
</property>
</activation>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<version>1.7</version>
<executions>
<execution>
<phase>process-classes</phase>
<goals>
<goal>run</goal>
</goals>
<configuration>
<target>
<property name="target.webapp.dir"
value="${project.build.directory}/${project.build.finalName}" />
<property name="src.webapp.dir" value="${basedir}/src/main/webapp" />
<sync verbose="true" todir="${target.webapp.dir}"
includeEmptyDirs="true">
<fileset dir="${src.webapp.dir}" />
<preserveintarget>
<include name="WEB-INF/lib/**" />
<include name="WEB-INF/classes/**" />
<include name="WEB-INF/appengine-generated/**" />
</preserveintarget>
</sync>
<sync verbose="true" todir="${target.webapp.dir}/WEB-INF/classes">
<fileset dir="${basedir}/target/classes" />
</sync>
</target>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
<pluginManagement>
<plugins>
<!-- This plugin's configuration is used to store Eclipse m2e settings
only. It has no influence on the Maven build itself. -->
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<versionRange>[1.6,)</versionRange>
<goals>
<goal>run</goal>
</goals>
</pluginExecutionFilter>
<action>
<execute>
<runOnIncremental>true</runOnIncremental>
</execute>
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
</profile>
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