ant compress and override js/css files - ant

Question

Hello i am trying to compress all the .css and .js files from a directory and overwrite the original file with the same name(no concatenation)
I am using this code https://stackoverflow.com/a/3826896/579646 (also tried numerous other tutorials) but it doesn't work.
I tried this
<target name="css.minify">
<apply executable="java" parallel="false" dest="${builddir}/${NAME}/site/assets/css" verbose="true">
<fileset dir="${builddir}/${NAME}/site/assets/css" includes="**/*.css"/>
<arg line="-jar"/>
<arg path="yuicompressor.jar"/>
<arg line="--line-break 0"/>
<srcfile/>
<arg line="-o"/>
<arg line="-v"/>
<mapper type="glob" from="*.css" to="*-min.css"/>
<targetfile/>
</apply>
<move todir="${builddir}/${NAME}/site/assets/css" overwrite="true" >
<fileset dir="${builddir}/${NAME}/site/assets/css" />
<mapper type="glob" from="*-min.css" to="*.css"/>
</move>
</target>
and this
<target name="js.minify">
<apply executable="java" parallel="false">
<fileset dir="${builddir}/${NAME}/site/assets/js" includes="**/*.js" casesensitive="no"/>
<arg line="-jar"/>
<arg path="yuicompressor.jar"/>
<srcfile/>
<arg line="-o"/>
<mapper type="glob" from="*.js" to="*.js"/>
<targetfile/>
</apply>
</target>
They both seem to fail
What am i doing wrong?

Answer 1

I did a test directly using the jar, to see why was not working.
I understood that from command line this is the right command options sequence:
$java -jar WEB-INF/lib/yuicompressor.jar -v -o <destination-file-min.js> <source-file.js>
Note that if the path (parent folders) of the destination file does not exists, the library will not create it (java.io.FileNotFoundException).
So, Ant:
<copy flatten="false" includeemptydirs="true" todir="${js.target.dir}">
<fileset dir="${js.source.dir}" excludes="**/*.*" includes="**/*" />
</copy>
<apply executable="java" dest="${js.target.dir}" parallel="false" verbose="true" ignoremissing="true">
<fileset dir="${js.source.dir}" includes="**/*.js" excludes="**/*-min.js, **/*.min.js"/>
<arg line="-jar"/>
<arg path="docroot/WEB-INF/lib/yuicompressor.jar"/>
<arg line="-o"/>
<mapper type="glob" from="*.js" to="*-min.js"/>
<targetfile/>
<srcfile/>
</apply>
The Copy before Apply is needed to create the relative path of destination minified js.
NOTE that targetfile and srcfile are reversed as expected by the jar.
I pasted only the js part.. for css it's the same.

Answer 2

I use this for both css and js and it works just fine:
<apply executable="java" parallel="false">
<fileset dir="${src.dir}/js" includes="*.js" />
<arg line="-jar" />
<arg path="${lib.path}/yuicompressor-2.4.7.jar" />
<srcfile />
<arg line="-o" />
<mapper type="glob" from="*.js" to="${dest.dir}/js/*.js" />
<targetfile />
</apply>
In the js.minify target u shared seems like u're overwriting the js files (look at the mapper tag), be careful with that.
Also in the css u're moving all the css and renaming them after compressing, this can be done all with the yui compressor target (look at my code).
I hope this helps.