Question

You can direct the installer to perform actions before installation starts by using the <preInstallationActionList> section. For example, the following code will set a different installation directory depending on the platform the installer is running on.

<preInstallationActionList>
          <setInstallerVariable>
            <name>installdir</name>
            <value>${env(SYSTEMDRIVE)}/${product_shortname}</value>
            <ruleList>
              <compareText>
               <text>${platform_name}</text>
               <logic>equals</logic>
               <value>windows</value>
              </compareText>
            </ruleList>
          </setInstallerVariable>
          <setInstallerVariable>
            <name>installdir</name>
            <value>/usr/local/${product_shortname}</value>
            <ruleList>
              <compareText>
               <text>${platform_name}</text>
               <logic>equals</logic>
               <value>linux</value>
              </compareText>
            </ruleList>
          </setInstallerVariable>
        </preInstallationActionList>