yuicompressor maven plugin and maven-war-plugin - maven

Question

I've been struggling with getting this plugin to play nicely with the maven-war-plugin for a couple of hours now and I thought it was time to ask for help. I have the plugin defined as follows:
<plugin>
<groupId>net.alchim31.maven</groupId>
<artifactId>yuicompressor-maven-plugin</artifactId>
<version>1.3.0</version>
<executions>
<execution>
<id>compressyui</id>
<phase>process-resources</phase>
<goals>
<goal>compress</goal>
</goals>
<configuration>
<nosuffix>true</nosuffix>
<warSourceDirectory>${basedir}/WebContent</warSourceDirectory>
<jswarn>false</jswarn>
</configuration>
</execution>
</executions>
</plugin>
If I remove nosuffix=true then I can see the compressed/minified -min.js files get into the war as expected, but with this flag on they are being overwritten by the maven-war-plugin (I'm assuming) when it builds the war file. I really need the file names to remain the same though ... does anyone have an idea of what I need to change in order to use the same filenames and still get the minified versions into the final war?

Answer 1

OK. I finally figured this out. You need to define a <webappDirectory> in the yuicompressor plugin that can then be referenced as a <resource> in the maven-war-plugin. In the example below I'm using <directory>${project.build.directory}/min</directory>
<plugin>
<groupId>net.alchim31.maven</groupId>
<artifactId>yuicompressor-maven-plugin</artifactId>
<version>1.3.0</version>
<executions>
<execution>
<id>compressyui</id>
<phase>process-resources</phase>
<goals>
<goal>compress</goal>
</goals>
<configuration>
<nosuffix>true</nosuffix>
<warSourceDirectory>${basedir}/WebContent</warSourceDirectory>
<webappDirectory>${project.build.directory}/min</webappDirectory>
<jswarn>false</jswarn>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<executions>
<execution>
<id>default-war</id>
<phase>package</phase>
<goals>
<goal>war</goal>
</goals>
<configuration>
<warSourceDirectory>${basedir}/WebContent</warSourceDirectory>
<encoding>UTF-8</encoding>
</configuration>
</execution>
</executions>
<configuration>
<warSourceDirectory>${basedir}/WebContent</warSourceDirectory>
<encoding>UTF-8</encoding>
<webResources>
<resource>
<directory>${project.build.directory}/min</directory>
</resource>
</webResources>
</configuration>
</plugin>

Answer 2

Just configure 'warSourceExcludes' on the WAR plugin.
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.4</version>
<configuration>
<warSourceExcludes>**/*.css,**/*.js</warSourceExcludes>
</configuration>
</plugin>

Answer 3

I would like to add the configuration which worked for me:
First, to fix m2e complaining about the 'Plugin execution not covered by lifecycle' I added the following in the parent pom taken from this post:
<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>net.alchim31.maven</groupId>
<artifactId>yuicompressor-maven-plugin</artifactId>
<versionRange>[1.0.0,)</versionRange>
<goals>
<goal>compress</goal>
</goals>
</pluginExecutionFilter>
<action>
<execute />
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
Then in the war pom I put:
<build>
<plugins>
<plugin>
<groupId>net.alchim31.maven</groupId>
<artifactId>yuicompressor-maven-plugin</artifactId>
<version>1.4.0</version>
<executions>
<execution>
<goals>
<goal>compress</goal>
</goals>
<configuration>
<linebreakpos>300</linebreakpos>
<excludes>
<exclude>**/*-min.js</exclude>
<exclude>**/*.min.js</exclude>
<exclude>**/*-min.css</exclude>
<exclude>**/*.min.css</exclude>
</excludes>
<nosuffix>true</nosuffix>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.4</version>
<configuration>
<warSourceExcludes>**/*.css,**/*.js</warSourceExcludes>
</configuration>
</plugin>
</plugins>
</build>
This generates the minified css and js files in the project build target directory while excluding the original files.
I hope this saves someone time.

Answer 4

this is my configuration, and it works fine in my maven web project:
<!-- js/css compress -->
<plugin>
<groupId>net.alchim31.maven</groupId>
<artifactId>yuicompressor-maven-plugin</artifactId>
<version>1.3.2</version>
<configuration>
<excludes>
<exclude>**/*-min.js</exclude>
<exclude>**/*.min.js</exclude>
<exclude>**/*-min.css</exclude>
<exclude>**/*.min.css</exclude>
</excludes>
<jswarn>false</jswarn>
<nosuffix>true</nosuffix>
</configuration>
<executions>
<execution>
<id>compress_js_css</id>
<phase>process-resources</phase>
<goals>
<goal>compress</goal>
</goals>
</execution>
</executions>
</plugin>
<!-- war -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<webResources>
<resource>
<directory>${project.build.directory}/${project.build.finalName}/resources</directory>
<targetPath>/resources</targetPath>
<filtering>false</filtering>
</resource>
</webResources>
<webXml>src/main/webapp/WEB-INF/web.xml</webXml>
</configuration>
</plugin>

Answer 5

The approach I use is a bit different.
First, I've configured my IDE to run mvn process-resources before the compilation/packaging. This way the files are created before the war is assembled.
It is very important to set <nosuffix>false</nosuffix> and <outputDirectory>${basedir}/src/main/resources/</outputDirectory> so the files can be created in the same directory without replacing your original source files.
<plugin>
<groupId>net.alchim31.maven</groupId>
<artifactId>yuicompressor-maven-plugin</artifactId>
<version>1.3.2</version>
<configuration>
<preProcessAggregates>false</preProcessAggregates>
<excludes>
<exclude>**/*-min.js</exclude>
<exclude>**/*.min.js</exclude>
<exclude>**/*-min.css</exclude>
<exclude>**/*.min.css</exclude>
</excludes>
<jswarn>false</jswarn>
<nosuffix>false</nosuffix> <!-- VERY IMPORTANT WILL REPLACE YOUR FILES IF YOU SET nosuffix TO TRUE OR DONT SET IT AT ALL -->
<outputDirectory>${basedir}/src/main/resources/</outputDirectory> <!-- by default the plugin will copy the minimized version to target directory -->
<failOnWarning>false</failOnWarning>
</configuration>
<executions>
<execution>
<id>compress_js_css</id>
<phase>process-resources</phase>
<goals>
<goal>compress</goal>
</goals>
</execution>
</executions>
</plugin>

Answer 6

As Jakob Kruse say, you must deal with the *.js, but no *.min.js, so my configurations is below, please notice the use of %regex[] :
<plugin>
<groupId>net.alchim31.maven</groupId>
<artifactId>yuicompressor-maven-plugin</artifactId>
<version>1.4.0</version>
<executions>
<execution>
<id>compressyui</id>
<phase>process-resources</phase>
<goals>
<goal>compress</goal>
</goals>
<configuration>
<nosuffix>true</nosuffix>
<warSourceDirectory>${basedir}/WebContent</warSourceDirectory>
<webappDirectory>${project.build.directory}/min</webappDirectory>
<jswarn>false</jswarn>
<excludes>
<exclude>**/*-min.js</exclude>
<exclude>**/*.min.js</exclude>
<exclude>**/*-min.css</exclude>
<exclude>**/*.min.css</exclude>
<exclude>**/jquery.window.js</exclude>
......
<exclude>**/compile.js</exclude>
</excludes>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.4</version>
<configuration>
<warSourceDirectory>WebContent</warSourceDirectory>
<packagingExcludes>servlet-api*.jar,target/test-classes/*</packagingExcludes>
<warSourceExcludes>test/**,%regex[.*(!min).js],%regex[.*(!min).css]</warSourceExcludes>
<webResources>
<resource>
<directory>${project.build.directory}/min</directory>
</resource>
</webResources>
</configuration>
</plugin>

Answer 7

Without pom.xml change
mvn net.alchim31.maven:yuicompressor-maven-plugin:compress
To force compress every js and css files and fail if warning
mvn net.alchim31.maven:yuicompressor-maven-plugin:compress \
-Dmaven.yuicompressor.force=true \
-Dmaven.yuicompressor.failOnWarning=true \
For more options:
http://davidb.github.io/yuicompressor-maven-plugin/usage_compress.html