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ClearCase Support: Installing and Implementing ClearCase TriggersA ClearCase Trigger is simply a script that runs whenever a ClearCase action is performed. Triggers are completely customizable by the ClearCase Admins (VOB owner). Triggers can run before (preop) or after (postop) a ClearCase action. By default, ClearCase does not have any triggers turned on. For example, if we would want to implement a trigger that will prevent users from permanently deleting ClearCase elements from the VOB using the "cleartool rmelem" command, here is one possible solution. First, this is how to install a UNIX trigger, called "rmelem_trigger", on the VOB called "/vob/test". The trigger is actually a Perl script at this location "/clearcase/rmelem_trigger/rmelem_trigger.pl".
In an environment with multiple types of operating systems, you may need to install a second trigger script. For example, here is the same installation command while running a different executable for Windows would be:
An example of the trigger script in Perl for UNIX would be:
If the script exits with a status of "0", then the ClearCase Trigger action (cleartool rmelem) is executed. If the script exits with a status of "1", then the ClearCase Trigger action is NOT executed. Of course, the Windows Perl script needs to be written too. To un-install a ClearCase trigger, use this command:
by Phil B.
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