updating relative path of jar while working on different OS - ant

Question

I would like to replace path of an existing jar based on OS .
Right now i am maintaning a text file called "build.start.properties" with all libraries some ting like this
/gwt/X/2.1.0/gwt-servlet.jar
/gwt/X/2.1.0/gwt-user.jar
/gwt/X/2.1.0/gwt-dev.jar
/gwt/X/2.1.0/gwt-soyc-vis.jar
/log4j/X/1.2.15/log4j-1.2.15.jar
/GWT_LOG/X/3.0.3/gwt-log-3.0.3.jar
/GWT_MATH/X/2.1/gwt-math-2.1.jar
/GWT_MATH/X/2.1/gwt-math-server-2.1.jar
/GWT_Commons_Logging/X/0.3/GWT-commons-logging/gwt-commons-logging-0.3.jar
/GWT_Commons_Logging/X/0.3/GWT-commons-logging/gwt-commons-logging-service-0.3.jar
And loading them to classptah using below target
<loadfile property="jars.list.property" srcfile="mybuild/build.start.properties">
<filterchain>
<expandproperties />
<striplinecomments>
<comment value="#" />
</striplinecomments>
<tokenfilter>
<ignoreblank />
</tokenfilter>
<prefixlines prefix="," />
<striplinebreaks />
</filterchain>
</loadfile>
<filelist id="build.libs" dir="" files="${jars.list.property}" />
<pathconvert targetos="unix" property="build_unix.libs" refid="build.libs">
<map from="C:" to="${unix.xenv}" />
<map from="" to="${unix.xenv}" />
</pathconvert>
<pathconvert targetos="windows" property="build_windows.libs" refid="build.libs">
<map from="C:" to="${windows.xenv}" />
<map from="" to="${windows.xenv}" />
</pathconvert>
<path id="build.classpath.id">
<pathelement path="${build_windows.libs}" />
<pathelement path="${build_unix.libs}" />
</path>
<echo message="Build Libraries classpath: ${toString:build.classpath.id}" />
</target>
from the above target build.classpath.id looks like
/gwt/X/2.1.0/gwt-servlet.jar:/gwt/X/2.1.0/gwt-user.jar:/gwt/X/2.1.0/gwt-dev.jar:/gwt/X/2.1.0/gwt-soyc-vis.jar:/log4j/X/1.2.15/log4j-1.2.15.jar:/GWT_LOG/X/3.0.3/gwt-log-3.0.3.jar:GWT_MATH/X/2.1/gwt-math-2.1.jar:/GWT_MATH/X/2.1/gwt-math-server-2.1.jar:/GWT_Commons_Logging/X/0.3/GWT-commons-logging/gwt-commons-logging-0.3.jar:/GWT_Commons_Logging/X/0.3/GWT-commons-logging/gwt-commons-logging-service-0.3.jar
When i work on unix I have to pic only jar names from file "build.start.properties" and update path like this
/WebContent/WEB_INF/lib/gwt-servlet.jar:/WebContent/WEB_INF/lib/gwt-user.jar:/WebContent/WEB_INF/lib/gwt-dev.jar:/WebContent/WEB_INF/lib/gwt-soyc-vis.jar:/WebContent/WEB_INF/lib/log4j-1.2.15.jar:/WebContent/WEB_INF/lib/gwt-log-3.0.3.jar:/WebContent/WEB_INF/lib/gwt-math-2.1.jar:/WebContent/WEB_INF/lib/gwt-math-server-2.1.jar:/WebContent/WEB_INF/lib/gwt-commons-logging-0.3.jar:/WebContent/WEB_INF/lib/gwt-commons-logging-service-0.3.jar

Answer 1

Use the conditions
<condition property="isWindows">
<os family="windows" />
</condition>
<condition property="isUnix">
<os family="unix" />
</condition>
On the targets then u can use
<target name="path_if_unix" if="isUnix">
<map from="C:" to="${unix.xenv}" />
<map from="" to="${unix.xenv}" />
</target>