How to set property into gwt.xml file via maven properties? - gwt

Question

I have a property in root pom.xml file: gecko1_8. I want to place this to gwt.xml file.
So I put this property to gwt.xml:
I added the following to build section:
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
<excludes>
<exclude>VAADIN.themes/*</exclude>
</excludes>
</resource>
</resources>
But at the end build failed with the error:
ERROR: Invalid property value '${gwt.user.agents}'
ERROR: Failure while parsing XML
How to place values from pom.xml to gwt.xml file via properties?
UPDATED
Interesting thing. When I use "mvn resources:resources", property's value writes correctly to gwt.xml file, but if I run "mvn clean install -pl com.myproject.module:submodule" it failes with "invalid property value".

Answer 1

You have to define a maven profile (better to define a specific profile for each cases) in your pom like this:
<profile>
<id>gecko</id>
<activation>
<activeByDefault>false</activeByDefault>
</activation>
<properties>
<user.agent.gecko>
<![CDATA[<set-property name="user.agent" value="gecko,gecko1_8" />]]>
</user.agent.gecko>
</properties>
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*YourGWTModule.gwt.xml</include>
</includes>
<filtering>true</filtering>
</resource>
</resources>
<defaultGoal>process-resources</defaultGoal>
</build>
</profile>
<properties>
<!--<user.agent>ie6,ie8,gecko,gecko1_8,opera,safari</user.agent>-->
<user.agent.all> </user.agent.all>
<user.agent.ie6> </user.agent.ie6>
<user.agent.ie8> </user.agent.ie8>
<user.agent.gecko> </user.agent.gecko>
<user.agent.opera> </user.agent.opera>
<user.agent.safari> </user.agent.safari>
</properties>
Then set it in your YourGWTModule.gwt.xml like this:
<set-property name="locale" value="default" />
<!-- Specified through pom.xml profiles -->
${user.agent.all}
${user.agent.ie6}
${user.agent.ie8}
${user.agent.gecko}
${user.agent.safari}
${user.agent.opera}
</module>
Finally run maven with profile:
mvn -P gecko install

Answer 2

There's one thing that I didn't mention but it appeared to be too important. Plugins that are used during build can have their own goals. And one of these goals can "redo" what maven-resource-plugin did.
So I had a plugin vaadin-maven-plugin:
<plugin>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-maven-plugin</artifactId>
<version>${vaadin.plugin.version}</version>
<configuration>
...
</configuration>
<executions>
<execution>
<goals>
<goal>resources</goal>
<goal>compile</goal>
</goals>
</execution>
</executions>
</plugin>
And removal of a <goal>resources</goal> fixed the issue. And now mvn clean install filters properties in my gwt.xml correctly.
Hope this solution help those who will run at such an issue.