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    <p>Since war overlays and war packaging all seems to happen as part of a single goal, I don't think there's a way to get in the middle of it. As a workaround, you could extract <code>web.xml</code> in an earlier phase and process it. The maven-dependency-plugin can be used in Project B to extract <code>web.xml</code> from Project A into a work directory, then run maven-config-processor-plugin on <code>web.xml</code> and place the result somewhere else, then instruct maven-war-plugin to include that processed <code>web.xml</code> before overlays. In Project B's POM:</p> <pre><code>&lt;plugins&gt; &lt;plugin&gt; &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt; &lt;artifactId&gt;maven-dependency-plugin&lt;/artifactId&gt; &lt;version&gt;2.4&lt;/version&gt; &lt;executions&gt; &lt;!-- Extract web.xml from Project A --&gt; &lt;execution&gt; &lt;id&gt;unpack-webxml&lt;/id&gt; &lt;phase&gt;generate-resources&lt;/phase&gt; &lt;goals&gt; &lt;goal&gt;unpack&lt;/goal&gt; &lt;/goals&gt; &lt;configuration&gt; &lt;artifactItems&gt; &lt;artifactItem&gt; &lt;groupId&gt;your.group&lt;/groupId&gt; &lt;artifactId&gt;project.a&lt;/artifactId&gt; &lt;version&gt;...&lt;/version&gt; &lt;type&gt;war&lt;/type&gt; &lt;overWrite&gt;true&lt;/overWrite&gt; &lt;outputDirectory&gt;${project.build.directory}/myconfig/work&lt;/outputDirectory&gt; &lt;includes&gt;WEB-INF/web.xml&lt;/includes&gt; &lt;/artifactItem&gt; &lt;/artifactItems&gt; &lt;/configuration&gt; &lt;/execution&gt; &lt;/executions&gt; &lt;/plugin&gt; &lt;plugin&gt; &lt;groupId&gt;com.google.code.maven-config-processor-plugin&lt;/groupId&gt; &lt;artifactId&gt;maven-config-processor-plugin&lt;/artifactId&gt; &lt;version&gt;2.0&lt;/version&gt; &lt;executions&gt; &lt;!-- Process extracted web.xml and place in temp build directory --&gt; &lt;execution&gt; &lt;id&gt;process-webxml&lt;/id&gt; &lt;goals&gt; &lt;goal&gt;process&lt;/goal&gt; &lt;/goals&gt; &lt;configuration&gt; &lt;outputDirectory&gt;${project.build.directory}/myconfig/build&lt;/outputDirectory&gt; &lt;transformations&gt; &lt;transformation&gt; &lt;input&gt;${project.build.directory}/myconfig/work/WEB-INF/web.xml&lt;/input&gt; &lt;output&gt;WEB-INF/web.xml&lt;/output&gt; &lt;!-- your transformation config --&gt; &lt;/transformation&gt; &lt;/transformations&gt; &lt;/configuration&gt; &lt;/execution&gt; &lt;/executions&gt; &lt;/plugin&gt; &lt;plugin&gt; &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt; &lt;artifactId&gt;maven-war-plugin&lt;/artifactId&gt; &lt;version&gt;2.1.1&lt;/version&gt; &lt;configuration&gt; &lt;webResources&gt; &lt;!-- Instruct war plugin to include temp build directory in webapp --&gt; &lt;resource&gt; &lt;directory&gt;${project.build.directory}/myconfig/build&lt;/directory&gt; &lt;includes&gt; &lt;include&gt;**&lt;/include&gt; &lt;/includes&gt; &lt;/resource&gt; &lt;/webResources&gt; &lt;overlays&gt; &lt;!-- Overlay customization if needed --&gt; &lt;/overlays&gt; &lt;/configuration&gt; &lt;/plugin&gt; &lt;/plugins&gt; </code></pre> <p>As far as I can tell, the war plugin includes <code>webResources</code> first, followed by <code>src/main/webapp</code>, followed by overlays.</p> <p>I'm not familiar with maven-config-processor-plugin, so I apologize if my configuration there is not correct.</p>
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    1. COThanks! Worked like a charm.
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    2. COMaybe said this too soon. It's not working now; the modified resource is getting overwritten by the overlay even though it indicates it's skipped it.
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    3. COBut the modified resource shows up correctly in the temporary build directory (`myconfig/build` in my answer)?
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