ant fileset cannot find directory which does exist - ant

I'm running an ant build from Hudson (Ubuntu). The build fails saying:
/var/lib/hudson/jobs/Genesys Multimedia RC/workspace/current/build.xml:34: /var/lib/hudson/jobs/Genesys Multimedia RC/workspace/current/Thirdparty/current does not exist.
Extract of build.xml:
<property name="extraDir" location="Thirdparty" />
<property name="J323ClearJarDir" location="${extraDir}/JRC/Thirdparty/J323/dist" />
<property name="JavaThirdPartyJarDir" location="${extraDir}/current" />
<property name="genesys_jars" location="lib" />
<!--Set the libs needed for compulation-->
<path id="lib">
<fileset dir="${genesys_jars}" includes="*.jar" />
<fileset dir="${JavaThirdPartyJarDir}" includes="*.jar" />
<fileset dir="${frameworkClearJarsDir}" includes="*.jar" />
<fileset dir="${J323ClearJarDir}" includes="*.jar" />
<fileset dir="${jrcClearJarDir}" includes="*.jar" />
</path>
That directory DOES exist however.
And this same build script was working on Hudson (Windows).
Oh what could the matter be?

Linux's filesystem is case sensitive.
The directory is ThirdParty whilst the property was referring to Thirdparty.
I shall be switching careers to become a professional human-lampshade.

Related

How to deploy configuration files,jars and ear files in remote weblogic server using ant script

I want to deploy the jar files,configuration files and generated ear file on remote weblogic server using ant script.
I have created ant script that stop the weblogic server,delete old files(jar,config xml files,ear) copy the given source to destination,this script is work when source and destination both are having on same machine.
<project name="Svn" default="startserver">
<property name="bea.home" value="C:/Oracle/Middleware/Oracle_Home" />
<property name="weblogic.home" value="${bea.home}/wlserver" />
<property name="domain.home" value="${bea.home}/user_projects/domains" />
<property name="domain.name" value="NAPF_domain" />
<property name="host" value="10.254.5.191" />
<property name="port" value="7001" />
<property name="username" value="weblogic" />
<property name="password" value="weblogic" />
<property name="admin.server.name" value="AdminServer" />
<property name="libdeploy.dir" value="${domain.home}/${domain.name}/lib/" />
<property name="configdeploy.dir" value="${domain.home}/${domain.name}/pf-appl/config/" />
<property name="eardeploy.dir" value="${domain.home}/${domain.name}/servers/AdminServer/upload/" />
<property name="libsource.dir" value="napf-main/napf-build/release/target/Release/lib/" />
<property name="configsource.dir" value="napf-main/napf-build/release/target/Release/config/" />
<property name="earsource.dir" value="napf-main/napf-build/release/target/Release/dist/" />
<property name="napfscutitysource.dir" value="napf-main/napf-security-lib" />
<property name="sourceMonitorHome" location="NAPF_SERVER_SOURCE/SourceMonitor"/>
<path id="wls.classpath">
<fileset dir="${weblogic.home}/server/lib">
<include name="web*.jar" />
</fileset>
</path>
<taskdef name="wlserver" classname="weblogic.ant.taskdefs.management.WLServer" classpathref="wls.classpath" />
<target name="start-server">
<wlserver dir="${domain.home}/${domain.name}" host="${host}" port="${port}" domainname="${domain.name}" servername="${admin.server.name}" action="start" username="${username}" password="${password}" beahome="${bea.home}" weblogichome="${weblogic.home}" verbose="true" noexit="true" protocol="t3" classpath="${weblogic.home}/server/lib/weblogic.jar">
<jvmarg value="-server" />
<jvmarg value="-Xms256m" />
<jvmarg value="-Xmx512m" />
<jvmarg value="-XX:PermSize=128m" />
<jvmarg value="-XX:MaxPermSize=256m" />
</wlserver>
<sleep seconds="2" />
</target>
<target name="stop-server">
<wlserver dir="${domain.home}/${domain.name}" host="${host}" port="${port}" servername="${admin.server.name}" username="${username}" password="${password}" action="shutdown" beahome="${bea.home}" weblogichome="${weblogic.home}" forceshutdown="true" />
</target>
<target name="purge-deploy" description="Delete old deploy files.">
<echo message="Deleting old deploy files..." />
<delete includeEmptyDirs="true">
<!-- Delete all jar files -->
<fileset dir="${libdeploy.dir}" includes="**/*" />
<!-- Delete all config files -->
<fileset dir="${configdeploy.dir}" includes="**/*" />
</delete>
</target>
<target name="copyToSecurityLib" description="Copy files to napf security folder.">
<copy todir="${libdeploy.dir}">
<fileset dir="${napfscutitysource.dir}">
<include name="**" />
<!-- ignore files/folders starting with svn -->
<exclude name="**/.svn" />
</fileset>
</copy>
</target>
<target name="copyToDeploy" description="Copy files to deploy folder.">
<copy todir="${libdeploy.dir}">
<fileset dir="${libsource.dir}">
<include name="**" />
<!-- ignore files/folders starting with svn -->
<exclude name="**/.svn" />
</fileset>
</copy>
<copy todir="${configdeploy.dir}">
<fileset dir="${configsource.dir}">
<include name="**" />
<!-- ignore files/folders starting with svn -->
<exclude name="**/.svn" />
</fileset>
</copy>
<copy todir="${eardeploy.dir}">
<fileset dir="${earsource.dir}">
<include name="**" />
<!-- ignore files/folders starting with svn -->
<exclude name="**/.svn" />
</fileset>
</copy>
</target>
<target name="purgeReport" description="Delete old report files.">
<echo message="Deleting old report files..." />
<delete includeEmptyDirs="true">
<fileset dir="${sourceMonitorHome}" includes="**/*.csv,*.jpeg,*.smp" />
</delete>
</target>
<target name="startSourceMonitor">
<exec dir="${sourceMonitorHome}" executable="cmd" failonerror="true" spawn="false">
<arg value="/c"/>
<arg value="sourcemonitor.bat"/>
</exec>
</target>
<target name="copyReportFiles" description="Copy files to napf source directory to slave workspace directory.">
<delete includeEmptyDirs="true">
<fileset dir="${sourceMonitorWorkSpace}"/>
</delete>
<mkdir dir="${sourceMonitorWorkSpace}"/>
<sleep seconds="1" />
<copy todir="${sourceMonitorWorkSpace}">
<fileset dir="${sourceMonitorHome}">
<include name="**/*.csv" />
<include name="**/*.jpeg" />
<exclude name="**/.svn" />
</fileset>
</copy>
</target>
Please suggest.
You can try wldeploy Ant task.
First, add task definition.
<taskdef name="wldeploy" classname="weblogic.ant.taskdefs.management.WLDeploy">
<classpath>
<pathelement location="${weblogic.home}/server/lib/weblogic.jar"/>
</classpath>
</taskdef>
Next, configure each action of wldeploy task, such as deploy, redeploy, or undeploy specifically.
Example,
<!-- The deployment name for the deployed application.
If you do not specify this attribute, WebLogic Server assigns a deployment name to the application, based on its archive file or exploded directory. -->
<property name="deploy.name" value="MyApp"/>
<!-- The archive file or exploded directory to deploy. -->
<property name="deploy.source" value="MyApp.ear"/>
<!-- The list of target servers to which the application is deployed.
The value of this attribute is a comma-separated list of the target servers, clusters, or virtual hosts.
If you do not specify a target list when deploying an application, the target defaults to the Administration Server instance. -->
<property name="deploy.targets" value="MyCluster"/>
<!-- Deploying Applications -->
<target name="deploy">
<wldeploy action="deploy"
name="${deploy.name}"
user="${username}"
password="${password}"
remote="true"
adminurl="t3://${host}:${port}"
source="${deploy.source}"
targets="${deploy.targets}"/>
</target>
<!-- Redeploying Applications -->
<target name="redeploy">
<wldeploy action="redeploy"
name="${deploy.name}"
user="${username}"
password="${password}"
remote="true"
adminurl="t3://${host}:${port}"
targets="${deploy.targets}"/>
</target>
<!-- Undeploying Applications -->
<target name="undeploy">
<wldeploy action="undeploy"
name="${deploy.name}"
failonerror="false"
user="${username}"
password="${password}"
remote="true"
adminurl="t3://${host}:${port}"
targets="${deploy.targets}"/>
</target>
Please note that if we want to deploy the JAR or EAR to remote WebLogic server, we must explicitly set the remote attribute in wldeploy tag to true, since the default value is false.
More complete reference regarding the task can be found on https://docs.oracle.com/cd/E12839_01/web.1111/e13706/wldeploy.htm
The above task would work if you are just specifying the remote server file path. Essentially you would need two parameters one is remote and other being upload.
The same would work but i see an parameter is missing for the task if you are deploying from a remote server
<target name="deploy1">
<wldeploy action="deploy"
upload="true"
remote="true"
name="${deploy.name.1}"
source="${deploy.source.1}"
user="${wls.username}"
password="${wls.password}"
verbose="true"
adminurl="t3://${wls.hostname}:${wls.port}" targets="${deploy.target}" />
</target>

svnant failing when trying to tag

I want create an ant build that creates a reference tag to a given project, but I'm getting an error:
Cannot find javahl, svnkit nor command line svn client
My build.xml:
<property name="tag.name" value="...." />
<path id="path.svnant">
<pathelement location="${basedir}/svnant.jar" />
<pathelement location="${basedir}/svnClientAdapter.jar" />
</path>
<typedef resource="org/tigris/subversion/svnant/svnantlib.xml" classpathref="..." />
<path id="svnant.classpath">
<fileset dir="${svnant.lib.dir}">
<include name="**/*.jar" />
</fileset>
</path>
<target name="svntag" description="tags individual project using svnant task">
<property name="svn.tag.message" value="Tagging Project ${project.name} with tag name ${tag.name} from trunk " />
<property name="src.url" value="${svn.base.url}/${project.name}/trunk/" />
<property name="dest.url" value="${svn.base.url}/${project.name}/tags/${tag.name}" />
<echo message="${svn.project.base.path}" />
<echo message="${svn.tag.message}" />
<echo message="${src.url}" />
<echo message="${dest.url}" />
<svnSetting javahl="false" svnkit="true" username="...." password="...." id="svn.settings" />
<svn>
<copy srcUrl="${src.url}" destUrl="${dest.url}" message="${svn.tag.message}" />
</svn>
</target>
See another question for details Cannot find javahl, svnkit nor command line svn client
I recommend you to use SVNKit (http://svnkit.com/kb/user-guide-svnant.html) because it's pure java SVN implementation so can be run on platforms where java exists.

JSP is not getting copied while creating war using Ant

I am using following Ant script to create a war of simple web application.
<?xml version="1.0" encoding="UTF-8"?>
<project name="MyProject" default="war">
<path id="compile.classpath">
<fileset dir="WebContent/WEB-INF/lib">
<include name="*.jar" />
</fileset>
</path>
<target name="compile">
<javac destdir="WebContent/WEB-INF/classes" debug="true" srcdir="src">
<classpath refid="compile.classpath" />
</javac>
</target>
<target name="war" depends="compile">
<war destfile="build/myproject.war" webxml="WebContent/WEB-INF/web.xml">
<fileset dir="WebContent">
<include name="**/*.jsp" />
</fileset>
<lib dir="WebContent/WEB-INF/lib" />
<classes dir="WebContent/WEB-INF/classes" />
</war>
</target>
</project>
It's creating the war but when I am opening the war, it's not containing JSP files due to which application is not running. Any idea what is wrong?
Also, right now I am coping war manually in Weblogic. Is there any Ant command which can deploy war?
I don't know exact answer but here is my way of using Ant build.xml for webapps. Give it a try. This works inside Eclipse or run from the command line. Few key points are:
build.xml has reference to compile-time libraries, including servlet-api.jar
dynamic META-INF/MANIFEST.MF
separate targets for compile, jar and war tasks to allow easier per project custom rules
webapp war don't have individual .class files but compiled web-inf/lib/mywebapp.jar library to minimize filesystem noice
you may create web/WEB-INF/classes/ folder and put some .properties file or extreme case "binary provided" class files. They are put inside war package along with other jsp,html,js files.
folder structure is very streamlined, I can use mywebapp/web/ folder directly in Tomcat service during development. Each html, jsp etc changes are reflected at runtime. Compiling jar triggers Tomcat to reload webapp instance.
Use this common folder structure for webapp project.
/mywebapp/ant.bat
/mywebapp/build.xml
/mywebapp/classes/
/mywebapp/src/
/mywebapp/src/META-INF/MANIFEST.MF
/mywebapp/lib/
/mywebapp/web/
/mywebapp/web/WEB-INF/web.xml
/mywebapp/web/WEB-INF/lib/
/mywebapp/web/META-INF/context.xml
mywebapp/build.xml
<?xml version="1.0" encoding="UTF-8"?>
<project name="mywebapp" default="build" basedir=".">
<property name="name" value="${ant.project.name}" />
<property name="classes" value="./classes" />
<property name="src" value="./src" />
<property name="webdir" value="./web" />
<property name="version" value="1.0"/>
<property environment="env"/>
<path id="libs">
<pathelement location="lib/servlet-api.jar" />
<pathelement location="web/WEB-INF/lib/somelib1.jar" />
<pathelement location="web/WEB-INF/lib/somelib2.jar" />
<pathelement location="web/WEB-INF/lib/gson-2.2.4.jar" />
</path>
<tstamp>
<format property="TODAY" pattern="yyyy-MM-dd HH:mm:ss" />
</tstamp>
<target name="updatemanifest" description="Update manifest">
<buildnumber file="build.num"/>
<copy file="${src}/META-INF/MANIFEST.MF"
todir="${classes}/META-INF/" overwrite="true" preservelastmodified="true"
/>
<manifest file="${classes}/META-INF/MANIFEST.MF" mode="update">
<attribute name="Implementation-Version" value="${version}.${build.number} (${TODAY})" />
<attribute name="Implementation-Title" value="${name}" />
</manifest>
</target>
<target name="clean" description="Clean compiled classes">
<delete dir="${classes}" />
</target>
<target name="compile" depends="clean" description="Compile classes">
<mkdir dir="${classes}"/>
<javac srcdir="${src}" destdir="${classes}" target="1.6" source="1.6" encoding="ISO-8859-1"
debug="true" debuglevel="lines,source"
excludes="" includeantruntime="false" >
<classpath refid="libs" />
<compilerarg value="-Xlint:deprecation" />
</javac>
</target>
<target name="jar" depends="updatemanifest" description="Create a .jar file">
<echo message="Build release: ${release}" />
<jar
manifest="${classes}/META-INF/MANIFEST.MF"
jarfile="${webdir}/WEB-INF/lib/${name}.jar" >
<fileset dir="${classes}">
</fileset>
</jar>
</target>
<target name="war" depends="compile,jar" description="Create a .war file">
<delete file="${name}.war" />
<zip destfile="${name}.war"
basedir="${webdir}"
excludes="
**/CVS*
"
/>
</target>
<target name="build" depends="war" description="Build lib">
</target>
</project>
src/META-INF/MANIFEST.MF
Implementation-Title: myappname
Implementation-Version: 1.0.0 (2010-03-01)
Implementation-Vendor: My Name Ltd.
Implementation-URL: http://www.myname.com
mywebapp/build.bat
call c:\apache-ant-1.7.0\bin\ant.bat build
pause
Build script creates war package and manifest.mf within web-inf/lib/mywebapp.jar is updated to have build number, title and version. Very handy you can use folder content as a template for new webapp projects. Just edit build.xml to have new project name.
Some compile-time dependencies point mywebapp/web-inf/lib folder. Non war-packaged libraries are put to mywebapp/lib/ folder for compile time only. I like keeping each dependency within project version control so thats a reason for this lib folder. You may use *.jar wildcard ant syntax but I explictly list each file for self documentation purpose.
Here is a bonus file to be used in Tomcat during development time. It publishes webapp on Tomcat and any changes in project folder is seen immediately, its very handy for client file changes (html,js,jsp).
this file is a copypaste from mywebapp/web/META-INF/context.xml file but an explicit docBase attribute is added.
It directs Tomcat to use files directly from project folder, no redeployment needed at runtime
Start tomcat and keep it running, you may run several webapp projects withing same Tomcat instance. Sometimes bigger development projects need it.
Remote debugging hook requires some java magic not included here
tomcat/conf/Catalina/localhost/mywebapp.xml
<?xml version="1.0" encoding="UTF-8"?>
<Context docBase="C:/mywebapp/web"
debug="0" reloadable="true" crossContext="true" >
<!--
<Valve className="org.apache.catalina.valves.RemoteAddrValve"
allow="127.0.0.1" />
-->
<!--
<Valve className="org.apache.catalina.valves.RequestDumperValve"/>
-->
<!-- pooled db connection -->
<Resource name="jdbc/mywebappDB" auth="Container" type="javax.sql.DataSource"
maxActive="10" maxIdle="2" maxWait="20000"
driverClassName="com.microsoft.sqlserver.jdbc.SQLServerDriver"
username="myuserid" password="mypwd"
url="jdbc:sqlserver://mysqlserv1.com:1433;DatabaseName=MyDB;applicationName=mywebapp"
validationQuery="SELECT 1"
/>
<!-- <ResourceLink name="jdbc/mywebappDB" global="jdbc/mywebappDB" type="javax.sql.DataSource" /> -->
<Resource name="jdbc/mywebappDB2" auth="Container" type="javax.sql.DataSource"
maxActive="100" maxIdle="20" maxWait="10000"
driverClassName="com.mysql.jdbc.Driver"
username="myuserid" password="mypwd"
url="jdbc:mysql://localhost:3306/myDB2?useUnicode=true&characterEncoding=utf8"
validationQuery="SELECT 1" removeAbandoned="true" removeAbandonedTimeout="300"
/>
</Context>
ps: Ant build system is fine no matter what some people may say. Go with it as you please.

Ant BND task does not produce bundle containing any items

I'm having trouble producing a bundle after converting a maven project to an ant project. The bnd ant task creates test.jar but the file only includes a META-INF. The eclipse project is named testproj. What am I missing? Also, does anyone know of a place with more bnd ant task examples? The bnd site itself is a little lacking in this regard, especially with how to build the classpath values.
<project name="testproj" basedir="." default="build">
<patternset id="project.deploy.jars">
<include name="slf4j-api-1.6.1.jar" />
<include name="logback-core-0.9.28.jar" />
<include name="logback-classic-0.9.28.jar" />
<include name="org.osgi.compendium-4.2.0.jar" />
<include name="org.apache.felix.http.jetty-2.2.0.jar" />
<include name="jcl-over-slf4j-1.6.1.jar" />
<include name="mail-1.4.4-1.0.0.jar" />
<include name="commons-io-2.0.1.jar" />
<include name="commons-lang-2.6.jar" />
<include name="commons-codec-1.5.jar" />
<include name="commons-httpclient-3.1-osgi-1.0.0.jar" />
<include name="bndlib-1.43.0.jar" />
<include name="ojdbc5-osgi-1.0.0.jar" />
<include name="joda-time-1.6.2.jar" />
<include name="cxf-dosgi-ri-singlebundle-distribution-1.2.jar" />
</patternset>
<path id="bnd.classpath">
<fileset dir="setup/external">
<patternset refid="project.deploy.jars" />
</fileset>
</path>
<target name="build" description="Build the bundle">
<taskdef resource="aQute/bnd/ant/taskdef.properties"
classpath="setup/dev/biz.aQute.bnd.jar"
/>
<pathconvert property="bnd.classpath.string" pathsep=",">
<path refid="bnd.classpath" />
<mapper>
<chainedmapper>
<flattenmapper/>
<regexpmapper from="(.*)" to="setup/external/\1" casesensitive="no"/>
</chainedmapper>
</mapper>
</pathconvert>
<echo>${bnd.classpath.string}</echo>
<bnd
classpath="target/classes,${bnd.classpath.string}"
eclipse="true"
failok="false"
exceptions="true"
output="test.jar"
files="test.bnd"/>
</target>
</project>
test.bnd:
Import-Package:com.test.service, oracle.sql, oracle.jdbc, oracle.jdbc.driver, *
Export-Package:com.test.service
Service-Component:com.test.*
1) Did you look at the ant support included in bndtools? Neil and I go out of our way to make bndtools run in offline mode.
2) The build.xml looks not proper ant syntax? Can you make a small example and post the proper files?
3) bnd should never generate a jar without a MANIFEST.MF file. Does the run have an error?
If you can't solve the problem feel free to send me a zip file with the setup and I'll check what's going on (and report here).
Following help from the group at Google Groups bndtools (which is a group for for both bndtools and bnd), the issue is apparently that the .bnd file does not contain the Private-Package header. This is used to specify the implementation package so make it a base package for all the classes you want brought in.
After I added it, all the classes showed up and the component xml appeared again.
Thanks for your help everyone!

ANT script to compile all (css) LESS files in a dir and subdirs with RHINO

I want do compile all *.less scripts in a specific folder and it subdirs with less-rhino-1.1.3.js.
There is an example on github for doing this for a specific file, which works perfect. But I want to do the same for a complete folder. I tried a lot, here is my last try.
It doesn't work, propertyregex seems not to be standard ANT, I don't want to use such things. I am not even sure if this code would work.
<project name="test" default="main" basedir="../../">
<property name="css.dir" location="public/css"/>
<property name="tool.less" location="bin/less/less-rhino-1.1.3.js"/>
<property name="tool.rhino" location="bin/tools/rhino/js.jar"/>
<macrodef name="lessjs">
<attribute name="input" />
<attribute name="output" />
<sequential>
<java jar="${tool.rhino}" fork="true" output="#{output}">
<arg path="${tool.less}"/>
<arg path="#{input}"/>
</java>
<echo>Lessjs: generated #{output}</echo>
</sequential>
</macrodef>
<target name="main">
<echo>compiling less css</echo>
<fileset dir="${css.dir}" id="myfile">
<filename name="**/*.less" />
</fileset>
<property name="lessfilename" refid="myfile"/>
<propertyregex property="cssfilename"
input="${lessfile}"
regexp="^(.*)\.less$"
replace="^\1\.css$"
casesensitive="true" />
<lessjs input="lessfile" output="cssfilename"/>
</target>
</project>
You could use the <fileset> to include all the less files need to be compiled. Later, you could use<mapper> to mark the corresponding detination css file.
<project name="test" default="main" basedir="../../">
<property name="css.dir" location="public/css"/>
<property name="tool.less" location="bin/less/less-rhino-1.1.3.js"/>
<property name="tool.rhino" location="bin/tools/rhino/js.jar"/>
<target name="less" description="Convert LESS to CSS then concatenate and Minify any stylesheets">
<echo message="Converting LESS to CSS..."/>
<!-- Clear the former compiled css files -->
<delete includeemptydirs="true">
<fileset dir="${css.dir}" includes="*.css, **/*.css" defaultexcludes="false"/>
</delete>
<apply dir="${css.dir}" executable="java" parallel="false" failonerror="true">
<!-- Give the input bundle of less files-->
<fileset dir="${css.dir}">
<include name="*.less"/>
</fileset>
<arg value="-jar" />
<arg path="${tool.rhino}" />
<arg path="${tool.less}" />
<srcfile/>
<!-- Output the compiled css file with corresponding name -->
<mapper type="glob" from="*.less" to="${css.dir}/*.css"/>
<targetfile/>
</apply>
</target>
</project>
I was able to piece together a working solution with the help of a couple of SO answers:
ANT script to compile all (css) LESS files in a dir and subdirs with RHINO
How to correctly execute lessc-rhino-1.6.3.js from command line
I had to download LESS 1.7.5 from GitHub and modify the Ant target to look like this. The -f argument and LESS JavaScript was key:
<property name="css.dir" value="WebContent/css"/>
<property name="less.dir" value="less"/>
<property name="tool.rhino.jar" value="test-lib/rhino-1.7R4.jar"/>
<property name="tool.rhino.lessc" value="test-lib/lessc-rhino-1.7.5.js"/>
<property name="tool.rhino.less" value="test-lib/less-rhino-1.7.5.js"/>
<target name="compile-less" description="compile css using LESS">
<apply dir="${css.dir}" executable="java" parallel="false" failonerror="true">
<fileset dir="${less.dir}">
<include name="styles.less"/>
</fileset>
<arg value="-jar"/>
<arg path="${tool.rhino.jar}"/>
<arg value="-f"/>
<arg path="${tool.rhino.less}"/>
<arg path="${tool.rhino.lessc}"/>
<srcfile/>
<mapper type="glob" from="*.less" to="${css.dir}/*.css"/>
<targetfile/>
</apply>
</target>
If anyone else is coming to this question recently, as I did, they may find that the less-rhino-1.1.3.js file given in the other answers does not work with the latest version of Rhino (which for me, as of now, is 1.7R4 from MDN). But the 1.4.0 version does, which can be obtained from Github here. So the relevant snippet from my build.xml, using these later versions, is shown. Note that I'm only compiling a single .less file to a single .css file, so no iteration or mappers are used (but obviously you can get those from the other answers). Other tweaks I made were to provide the output file as the final arg to less instead of capturing output from the Ant forked process, and to remove the dependency on ant-contrib stuff (not needed for the simple one-file case).
<property name="tool.rhino" value="build/lesscss/rhino1_7R4/js.jar" />
<property name="tool.less" value="build/lesscss/less-rhino-1.4.0.js" />
<property name="single-input-lesscss-file" value="/path/to/my/style.less" />
<property name="single-output-css-file" value="/output/my/style.css" />
<target name="compileLessCss" description="Compile the single less file to css">
<sequential>
<java jar="${tool.rhino}" fork="true">
<arg path="${tool.less}" />
<arg path="${single-input-lesscss-file}" />
<arg path="${single-output-css-file}" />
</java>
</sequential>
</target>
If maven is an option for you, you could try wro4j-maven-plugin or wro4j-runner (which is a command line utility).
Using one of these, all you have do is to create an resource model descriptor (wro.xml):
<groups xmlns="http://www.isdc.ro/wro">
<group name="g1">
<css>/path/to/*.less</css>
</group>
</groups>
The rest will be handled by the wro4j library. No need to carry about how rhino works or other details.
Disclaimer: I'm working on wro4j project
I had the same issue. I developed a solution using ant-contrib. It expects all of your .less files to be in one flat directory and to be moved to another flat directory. It will change the file extension to .css in the process.
<property name="tool.rhino" value="/rhino/js.jar" />
<property name="tool.less" value="src/js/less-rhino-1.1.3.js" />
<property name="tool.ant-contrib" value="/ant-contrib/ant-contrib-1.0b3-1.0b3.jar" />
<property name="less-files-dir" value="src/css/" />
<property name="css-files-dir" value="build/css/" />
<target name="compilecss" depends="setup-ant-contrib-taskdef, get-less-files-in-dir" description="DO THIS THING">
<for list="${less-files-to-convert}" param="file-name" trim="true" delimiter=",">
<sequential>
<propertyregex property="file-name-without-extension"
input="#{file-name}"
regexp="(.*)\..*"
select="\1"
override="yes" />
<java jar="${tool.rhino}" fork="true" output="${css-files-dir}${file-name-without-extension}.css">
<arg path="${tool.less}" />
<arg path="${less-files-dir}#{file-name}" />
</java>
<echo>Lessjs: generated ${css-files-dir}${file-name-without-extension}.css</echo>
</sequential>
</for>
</target>
<target name="check-for-ant-contrib">
<condition property="ant-contrib-available">
<and>
<available file="${tool.ant-contrib}"/>
</and>
</condition>
<fail unless="ant-contrib-available" message="Ant-Contrib is not available."/>
</target>
<target name="setup-ant-contrib-taskdef" depends="check-for-ant-contrib">
<taskdef resource="net/sf/antcontrib/antlib.xml">
<classpath>
<path location="${tool.ant-contrib}" />
</classpath>
</taskdef>
</target>
<target name="get-less-files-in-dir">
<var name="files-list" value="" />
<for param="file">
<path>
<fileset dir="${less-files-dir}" includes="**/*.less" />
</path>
<sequential>
<propertyregex property="file-name-and-relative-path"
input="#{file}"
regexp=".*\\(.*)"
select="\1"
override="yes" />
<echo>file name: ${file-name-and-relative-path}</echo>
<if>
<equals arg1="${files-list}" arg2="" />
<then>
<var name="files-list" value="${file-name-and-relative-path}" />
</then>
<else>
<var name="files-list" value="${files-list},${file-name-and-relative-path}" />
</else>
</if>
</sequential>
</for>
<property name="less-files-to-convert" value="${files-list}" />
<echo>files to convert: ${less-files-to-convert}</echo>
</target>
I was unable to get this to run using a JDK 1.6 since the javascript stuff has been incorporated to the JDK. The JDK does have a jrunscript executable in the distribution but when I try to run the less-rhino.js file it fails to recognize any readFile() function. Has anyone looked into that. Otherwise I may be giving the lesscss-engine a shot and enhancing it to understand filesets.

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