NAME

       deb-triggers - package triggers

SYNOPSIS

       triggers

DESCRIPTION

       A  package  declares  its  relationship  to  some  trigger(s) by including a triggers file in its control
       archive (i.e. DEBIAN/triggers during package creation).

       This file contains directives, one per line. Leading and trailing whitespace  and  everything  after  the
       first # on any line will be trimmed, and empty lines will be ignored.

       The trigger control directives currently supported are:

            interest trigger-name

            interest-noawait trigger-name

            Specifies  that  the  package is interested in the named trigger. All triggers in which a package is
            interested must be listed using this directive in the triggers control file. The  "noawait"  variant
            does  not  put  the  triggering  packages  in  triggers-awaited  state. This should be used when the
            functionality provided by the trigger is not crucial.

            activate trigger-name

            activate-noawait trigger-name

            Arranges that changes to this package's state will activate the specified trigger. The trigger  will
            be  activated at the start of the following operations: unpack, configure, remove (including for the
            benefit of a conflicting package), purge and deconfigure.  The "noawait" variant does  not  put  the
            triggering  packages  in triggers-awaited state. This should be used when the functionality provided
            by the trigger is not crucial.

            If this package disappears during the unpacking of another package the  trigger  will  be  activated
            when  the  disappearance  is noted towards the end of the unpack. Trigger processing, and transition
            from triggers-awaited to installed, does not cause activations.  In the  case  of  unpack,  triggers
            mentioned in both the old and new versions of the package will be activated.

       Unknown directives are an error which will prevent installation of the package.

       The  "-noawait"  variants  are  only supported since dpkg 1.16.1, and will lead to errors if used with an
       older dpkg. It is thus recommended to add a "Pre-Depends: dpkg (>= 1.16.1)" to any package that  wish  to
       use those directives.

SEE ALSO

       dpkg-trigger(1), dpkg(1), /usr/share/doc/dpkg-dev/triggers.txt.gz.

Debian Project                                     2013-04-02                                    deb-triggers(5)