yui compressor maven plugin doesnt compress the js files

Question

Hi, I am using yui compressor to compress the js files in my web app.

I have configured the plugin as indicated on yui maven plugin site yui compressor maven plugin.

This is the pom plugin conf

   <plugin>
    <groupId>net.sf.alchim</groupId>
    <artifactId>yuicompressor-maven-plugin</artifactId>
    <version>0.7.1</version>  
    <executions>
      <execution>
     <phase>compile</phase>
        <goals>
         <goal>jslint</goal>
          <goal>compress</goal>
        </goals>
      </execution>
    </executions>        
    <configuration>
    <failOnWarning>true</failOnWarning>
      <nosuffix>true</nosuffix>
      <force>true</force>
      <aggregations>
       <aggregation>
          <!-- remove files after aggregation (default: false) -->
          <removeIncluded>false</removeIncluded>
          <!-- insert new line after each concatenation (default: false) -->
          <insertNewLine>false</insertNewLine>
          <output>${project.basedir}/${webcontent.dir}/js/compressedAll.js</output>
          <!-- files to include, path relative to output's directory or absolute path-->
          <!--inputDir>base directory for non absolute includes, default to parent dir of output</inputDir-->
          <includes>                
            <include>**/autocomplete.js</include>
            <include>**/calendar.js</include>
            <include>**/dialogs.js</include>
            <include>**/download.js</include>
            <include>**/folding.js</include>
            <include>**/jquery-1.4.2.min.js</include>
            <include>**/jquery.bgiframe.min.js</include>
            <include>**/jquery.loadmask.js</include>
            <include>**/jquery.printelement-1.1.js</include>
            <include>**/jquery.tablesorter.mod.js</include>
            <include>**/jquery.tablesorter.pager.js</include>
            <include>**/jquery.dialogs.plugin.js</include>
            <include>**/jquery.ui.autocomplete.js</include>                
            <include>**/jquery.validate.js</include>  
            <include>**/jquery-ui-1.8.custom.min.js</include>
            <include>**/languageDropdown.js</include>
            <include>**/messages.js</include>
            <include>**/print.js</include>
            <include>**/tables.js</include>
            <include>**/tabs.js</include>
            <include>**/uwTooltip.js</include>
          </includes>
          <!-- files to exclude, path relative to output's directory-->

        </aggregation>
      </aggregations>
    </configuration>
    <dependencies>
         <dependency> 
 <groupId>rhino</groupId>  
  <artifactId>js</artifactId>       
  <scope>compile</scope>  
  <version>1.6R5</version> 
</dependency>  
<dependency>
        <groupId>org.apache.maven</groupId>
        <artifactId>maven-plugin-api</artifactId>
        <version>2.0.7</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.apache.maven</groupId>
        <artifactId>maven-project</artifactId>
        <version>2.0.7</version>
        <scope>provided</scope>
    </dependency><dependency>
        <groupId>net.sf.retrotranslator</groupId>
        <artifactId>retrotranslator-runtime</artifactId>
        <version>1.2.9</version>
        <scope>runtime</scope>
    </dependency>

    </dependencies>
  </plugin>

And here is the log at compress time

These will use the artifact files already in the core ClassRealm instead, to allow them to be included in PluginDescriptor.getArtifacts().


[DEBUG] Configuring mojo 'net.sf.alchim:yuicompressor-maven-plugin:0.7.1:jslint' 
[DEBUG]   (f) failOnWarning = true
[DEBUG]   (f) jswarn = true
[DEBUG]   (f) outputDirectory = C:\test\target\classes
[DEBUG]   (f) project = MavenProject: com.test.test1:test2:19-SNAPSHOT @ C:\test\pom.xml
[DEBUG]   (f) resources = [Resource {targetPath: null, filtering: false, FileSet {directory: C:\test\src,
 PatternSet [includes: {}, excludes: {**/*.class, **/*.java, site/*}]}}]
[DEBUG]   (f) sourceDirectory = C:\test\src\..\js
[DEBUG]   (f) warSourceDirectory = C:\test\src\main\webapp
[DEBUG]   (f) webappDirectory = C:\test\target\test2-19-SNAPSHOT
[DEBUG] -- end configuration --
[INFO] [yuicompressor:jslint {execution: default}]
[INFO] nb warnings: 0, nb errors: 0
[DEBUG] Configuring mojo 'net.sf.alchim:yuicompressor-maven-plugin:0.7.1:compress' -->
[DEBUG]   (f) removeIncluded = false
[DEBUG]   (f) insertNewLine = false
[DEBUG]   (f) output = C:\test\WebContent\js\compressedAll.js
[DEBUG]   (f) includes = [**/autocomplete.js, **/calendar.js, **/dialogs.js, **/download.js, **/folding.js, **/jquery-1.4.2.min.js, **/jquery.bgifram
e.min.js, **/jquery.loadmask.js, **/jquery.printelement-1.1.js, **/jquery.tablesorter.mod.js, **/jquery.tablesorter.pager.js, **/jquery.dialogs.p
lugin.js, **/jquery.ui.autocomplete.js, **/jquery.validate.js, **/jquery-ui-1.8.custom.min.js, **/languageDropdown.js, **/messages.js, **/print.js, *
*/tables.js, **/tabs.js, **/uwTooltip.js]
[DEBUG]   (f) aggregations = [net.sf.alchim.mojo.yuicompressor.Aggregation@65646564]
[DEBUG]   (f) disableOptimizations = false
[DEBUG]   (f) encoding = Cp1252
[DEBUG]   (f) failOnWarning = true
[DEBUG]   (f) force = true
[DEBUG]   (f) gzip = false
[DEBUG]   (f) jswarn = true
[DEBUG]   (f) linebreakpos = 0
[DEBUG]   (f) nomunge = false
[DEBUG]   (f) nosuffix = true
[DEBUG]   (f) outputDirectory = C:\test\target\classes
[DEBUG]   (f) preserveAllSemiColons = false
[DEBUG]   (f) project = MavenProject: com.test.test1:test2:19-SNAPSHOT @ C:\test\pom.xml
[DEBUG]   (f) resources = [Resource {targetPath: null, filtering: false, FileSet {directory: C:\test\src,
 PatternSet [includes: {}, excludes: {**/*.class, **/*.java, site/*}]}}]
[DEBUG]   (f) sourceDirectory = C:\test\src\..\js
[DEBUG]   (f) statistics = true
[DEBUG]   (f) suffix = -min
[DEBUG]   (f) warSourceDirectory = C:\test\src\main\webapp
[DEBUG]   (f) webappDirectory = C:\test\target\test2-19-SNAPSHOT
[DEBUG] -- end configuration --
[INFO] [yuicompressor:compress {execution: default}]
[INFO] generate aggregation : C:\test\WebContent\js\compressedAll.js
[INFO] compressedAll.js (407505b)
[INFO] nb warnings: 0, nb errors: 0
[DEBUG] Configuring mojo 'org.apache.maven.plugins:maven-resources-plugin:2.2:testResources' -->
[DEBUG]   (f) filters = []
[DEBUG]   (f) outputDirectory = C:\test\target\test-classes
[DEBUG]   (f) project = MavenProject: com.test.test1:test2:19-SNAPSHOT @ C:\test\pom.xml
[DEBUG]   (f) resources = [Resource {targetPath: null, filtering: false, FileSet {directory: C:\test\test
, PatternSet [includes: {}, excludes: {**/*.class, **/*.java}]}}]
[DEBUG] -- end configuration --

The problem is the files are getting aggregated into one file but without compressing.

The link above uses version 1.1 and the plugin version I am using is 0.7.1. Is this going to make any diff.

Can someone tell what is wrong here.

PS: I have obfuscated some text in log to follow the compliance in my firm. So you may find it mismatching somewhere.

Answer 1

Can you try defining separate execution for jslint and compress and see if that works?

<executions>
    <execution>
        <goals>
            <goal>jslint</goal>         
        </goals>
        <configuration> ... </configuration>
    </execution>
    <execution>
        <goals>
            <goal>compress</goal>         
        </goals>
        <configuration> ... </configuration>
    </execution>
</executions>

Answer 2

The YUI compressor (included as a dependency in this maven plugin) uses a "patched" version of Mozilla Rhino for:

• interpreting javascript
• compressing local variables names (the "patch")

By adding yourself the dependency to Rhino (in your previous question), I think these "patches" are overwritten, turning this maven plugin into something useless: the name-compressing, spaces-deleting behaviours are gone.

So remove rhino from your pom, and go back to solving your first problem!