Using FilterSet to generate a file from a template with Ant
See:
Copy a template file to a directory, replacing @TOKENS@ with build.properties values:
<copy file="template.conf" tofile="config.conf" overwrite="true">
<filterset>
<filter token="USERNAME" value="${auth.username}"/>
<filter token="PASSWORD" value="${auth.password}"/>
<filterset>
</copy>
The template file:
username=DavidKeen password=@PASSWORD@
The build.properties file:
auth.username=my_username auth.password=my_password