Ant Build-Script how to check for root privileges

Question

How can I check for root privileges with an Ant build script? I tried doing it with the shellscript task like

<shellscript shell="bash">
    if [[ `whoami` != 'root' ]]; then
        echo "You need to be root to install ooplss";
        exit 1
    fi
</shellscript>

But this won't stop the execution of the script.

Any other ideas?

Answer 1

The shellscript task is an extension of the exec task. You should be able to specify failonerror to make the build process fail if the script fails:

failonerror: Stop the buildprocess if the command exits with a return code signaling failure. Defaults to false.

<shellscript shell="bash" failonerror="true">
    if [[ `whoami` != 'root' ]]; then
        echo "You need to be root to install ooplss";
        exit 1
    fi
</shellscript>

It should however be possible to do without a shell script; the following is untested:

<fail message="You need to be root to install ooplss">
 <condition>
   <not>
     <equals arg1="root" arg2="${user.name}"/>
   </not>
 </condition>
</fail>

Answer 2

You can check the java property user.name:

<target name="checkroot">
  <condition property="isroot">
    <equals arg1="${os.user}" arg2="root"/>
  </condition>
</target>
<target name="dostuff" depends="checkroot" unless="isroot">
...
</target>

Since ant 1.7 you can also use <scriptcondition> to do something clever in a script instead of the <equals> above

Answer 3

a straight approach with Ant Plugin Flaka =

<project xmlns:fl="antlib:it.haefelinger.flaka">
  <fl:when test=" '${user.name}'.toupper eq 'ROOT' ">
    <!-- your tasks go here.. -->
  </fl:when>
</project>